JPH088076Y2 - Plastic band shredder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a band shredder, and more particularly to a shredder for a plastic band for packing.

[Conventional technology]

Bundling and unbundling machines for packing plastic bands (particularly polypropylene bands) such as corrugated cardboard used for industrial and commercial purposes are often found at present, but the plastic bands after unbundling are flexible and therefore easy. It does not become a dense mass, but has a huge volume instead of weight.

For this reason, the waste materials of the plastic band are currently handled by manually binding them together or pushing them into a garbage bag to reduce the volume of the waste material and then closing the mouth of the bag. In particular, the waste material of the plastic band used for industrial use requires a great number of man-hours required for its treatment and a large waste material transportation cost.

[Problems to be solved by the device]

Under these circumstances, the present invention cuts plastic band waste material into pieces, increases the stacking density when the waste material accumulates, reduces the man-hours required for waste material processing and waste material transportation costs, and further improves the automatic production line. It is an object of the present invention to provide a device which can be incorporated into a device and can reasonably process waste materials.

[Means for solving the problem]

In order to achieve the above-mentioned object, the present invention has a pair of feed rollers that sandwich a plastic band and convey the plastic band by its rotation, and a pair of feed rollers that have a flat blade and a rotary blade and are conveyed by the pair of feed rollers. A plastic band that holds a plastic band conveyed by the pair of feed rollers between a combination blade that cuts the plastic band that comes in cooperation with the flat blade and the rotary blade and a base that supports the flat blade. And an auxiliary roller for guiding the blade to the cutting portion between the flat blade and the rotary blade, and a spray for spraying a conductive liquid toward the plastic band which is arranged and conveyed between the pair of feed rollers and the combination blade. A nozzle, and a plastic band, which is conveyed in opposition to the auxiliary roller, enters between the auxiliary roller and an entrance portion of the base, It is characterized in that the chamfered portion is formed so as to spread between the base toward the entering direction of the lath tic band and the auxiliary roller.

[Action]

When a plastic band is supplied between the rotating feed rollers, the plastic band is bitten by the feed roller from its tip and conveyed. Next, the plastic band is sandwiched between the auxiliary roller and the tip of the base and guided by the auxiliary roller to the cutter portion.
In this cutter part, the plastic band to be forcibly fed is continuously shredded by the intermittent association between the blade mounting surface of the flat blade and the blade mounting surface of the rotating rotary blade.

Further, the plastic band conveyed by the pair of feed rollers surely enters between the auxiliary band and the chamfered portion formed on the base. Also, the conductive liquid is sprayed by the spray nozzle to remove static electricity of the plastic band before cutting.

As a result, the waste material of the plastic band is shredded, the stacking density when the waste material is accumulated is increased, the man-hour required for the waste material processing and the transportation cost of the waste material are reduced, and it can be incorporated in the automatic production line. Processing can be done reasonably.

〔Example〕

An embodiment of a plastic band slicing machine 1 according to the present invention (hereinafter simply referred to as a band slicing machine 1) will be described below with reference to FIG. 1 or FIG.

As shown in FIG. 1, a plastic band 7 such as a polypropylene band to be shredded is fed from the upper side to the lower side, and a pair of feed rollers 21 and 25 for sandwiching the band 7 are provided at the upper part of the drawing. Are provided facing each other.

The feed rollers 21 and 25 are adapted to rotate in the directions of the arrows by motor driving (not shown), and to feed the sandwiched band 7 downward by the frictional force between the band 7 and the feed rollers 21 and 25. There is.

Further, the feed rollers 21 and 25 are preferably provided with a clamp mechanism that changes the gap between the rollers.

As the clamp mechanism, for example, an air cylinder (not shown) may be used to move the feed roller 25 left and right in the arrow (a) or (b) direction as shown.
As a result, before sandwiching the band 7, the feed roller 25 is moved in the direction of the arrow (a), the gap between the feed roller 21 and the feed roller 25 is widened, and the band 7 is inserted into this gap. After that, the roller 25 can be moved in the arrow (B) direction to reliably clamp the band 7.

Below the feed rollers 21 and 25, there is provided a combination blade of a flat blade 40 and a rotary blade 50 for finely cutting the fed plastic band 7.

The flat blade 40 is fixed to the lower part of the tip of the fixed base 41, and the flat blade 40 is further provided with a blade attachment portion 40a at the lower end of the tip.

The rotary blade 50 combined with the flat blade 40 is fitted on a shaft (not shown) and is rotated by a motor (not shown).

On the outer peripheral surface of the rotary blade 50, a spiral blade attachment portion 50a
Are arranged in a predetermined number (4 sheets in this embodiment), and the plastic band 7 bitten by the shearing force between the blade attaching portion 50a and the blade attaching portion 40a of the flat blade 40 is cut into small pieces. Has become.

Immediately upstream (upstream side) of such a combination blade of the flat blade 40 and the rotary blade 50, an auxiliary roller is provided along the moving path of the band 7.
31 is provided. In the case of the present embodiment, the auxiliary roller 31 holds the plastic band 7 by the combination with the front end portion 41a of the base 41 facing each other, and is rotated by a motor drive (not shown). The upper part of the front end of the base 41 is the plastic band 7
It is preferable to chamfer so that it can be easily held.

This serves to hold down the plastic band 7 during cutting and ensures that the end of the plastic band 7 is finely cut even after it has slipped out of the feed rollers 21 and 25, and the remaining material including the end of the plastic band 7 is the cutter part. It does not stay at the entrance.

Note that the other party that faces the auxiliary roller 31 and holds the band 7 is not limited to the tip end portion of the base 41, and various types such as the front end portion of the flat blade 40 or a newly provided roller can be used.

It is preferable to provide a spray nozzle 60 between the auxiliary roller 31 and the feed rollers 21 and 25, and a plastic for cutting conductive liquid such as water or a surfactant aqueous solution from the spray nozzle 60. It sprays toward the band 7 to remove static electricity.

As a result, it is possible to prevent the band pieces 7a that have been cut into pieces from being attached to the periphery of the machine due to static electricity.

Needless to say, the aqueous surfactant solution or the like may be applied using various known applying means regardless of the spray nozzle 60.

Next, the operation of the plastic band shredder 1 according to the present invention constructed as described above will be briefly described.

First, when the plastic band 7 is supplied between the rotating feed rollers 21 and 25, the plastic band 7
The leading end is bitten into the feed rollers 21 and 25 and conveyed.

Then, it is inserted between the auxiliary roller 31 and the tip portion 41a of the base 41, and guided by the auxiliary roller 31 to the cutter portion.

At the cutter portion, the plastic band 7 is finely cut into band pieces 7a due to intermittent association between the blade mounting surface 40a of the flat blade 40 and the blade mounting surface 50a of the rotating rotary blade 50.

The band piece 7a thus cut into pieces is usually stored in a garbage bag (not shown) or the like and discarded.

When the pair of feed rollers 21 and 25 are provided with a clamp mechanism that changes the gap between the rollers, the following initial operation is usually performed.

That is, first, as shown in FIG.
25 is moved in the direction of arrow (a) and the feed rollers 21, 2
Waiting with the gap 5 wide open, at the same time detecting the insertion of the plastic band 7, at the same time, the feed roller 25 is moved in the direction of the arrow (b) to narrow the gap between the feed rollers 21 and 25 and grip the plastic band 7. Put in. By providing such a clamp mechanism, reliable operation can be guaranteed.

The present apparatus described above can be used alone, and a series of automation can be achieved, for example, by connecting it to a debinding device for cutting and removing the plastic band from the cardboard box bound with the plastic band. it can. In this case, the plastic band unbundled in the unbundling step can be continuously cut into small pieces by this device.

In addition to the plastic band, the present device can be applied to waste materials such as telephone cards after punching, and plastic plates such as used telephone cards and the like.

[Effect of device]

The present invention is a roller that clamps and sends out a plastic band, a combination blade of a flat blade and a rotary blade that cuts the plastic band sent by this feed roller into small pieces,
Since an auxiliary roller provided immediately before the combined blade is provided, the waste material of the plastic band is shredded, the stacking density when the waste material is accumulated is increased, and the man-hours required for the waste material treatment and the transportation cost of the waste material are reduced. It can be reduced and can be incorporated into an automatic production line, and waste materials can be treated rationally.

 Furthermore, high-speed cutting is possible.

Further, since the present invention is equipped with the spray nozzle for spraying the conductive liquid toward the conveyed plastic band, the static electricity of the plastic band to be cut from this can be removed. As described above, by removing the static electricity of the plastic band before cutting, it is possible to prevent the cut band piece from being attached to the peripheral mechanical portion by static electricity. Further, the chamfered part is formed so that the plastic band that faces the auxiliary roller and enters the base band enters between the auxiliary roller and the auxiliary roller, and the space between the plastic band and the auxiliary roller expands in the entrance direction of the plastic band. Since the plastic band is reliably inserted into the space between the base and the auxiliary roller, the plastic band does not cause jamming before the combination blade. This is particularly effective for reliably guiding the used plastic band, which is a waste material, which is often straight and not bent, to the cut portion.

[Brief description of drawings]

FIG. 1 is a schematic perspective view of the plastic band shredder of the present invention, and FIG. 2 is a front view thereof. 1 …… Plastic band shredder, 7 …… Plastic band, 21,25 …… Feed roller, 31 …… Auxiliary roller, 40
…… Flat blade, 50 …… Rotating blade.

Claims (1)

[Scope of utility model registration request] 1. A pair of feed rollers for sandwiching a plastic band and conveying the plastic band by its rotation, and a plastic band having a flat blade and a rotary blade and conveyed by the pair of feed rollers is a flat blade. A combination blade that cuts in cooperation with a rotary blade, and a plastic band conveyed by the pair of feed rollers is clamped between a base that supports the flat blade to form a plastic band with the flat blade and the rotary blade. An auxiliary roller that guides the cutting portion between the pair of feed rollers and a combination blade, and a spray nozzle that sprays a conductive liquid toward a plastic band that is conveyed, and the auxiliary The plastic band advances toward the entrance of the base, where the plastic band that is conveyed facing the roller enters between it and the auxiliary roller. A plastic band slicing machine, characterized in that a chamfered portion is formed so that a space between a base and an auxiliary roller expands in the inserting direction.