JP2005254467A - Separation apparatus of plastic container - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a separation apparatus of plastic containers capable of accurately and rapidly separating a used PET bottle recovered by a local government and the labels mounted thereon. <P>SOLUTION: The separation apparatus of plastic containers is equipped with a housing 10 provided with a charging port 12 for charging the PET bottle while labels are attached to the PET bottle, a first discharge port 13 for discharging the crushed PET bottle from which labels removed and a second discharge port 14 for discharging the labels peeled from the PET bottle. The rotary blades 16 radially mounted on a rotary shaft 15 to crush the PET bottle by the rotary motion of the rotary shaft and generating air streams from the first discharge port 13 to the second discharge port 14 in the housing and the baffle plates 17 arranged so as not to interfere with the rotary blades 16 are provided in the housing 10. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an apparatus for removing and separating labels attached to plastic containers such as plastic bottles when recycling the plastic containers.

  A bottle made of polyethylene terephthalate containing a soft drink and a so-called PET bottle is widely distributed. At the stage where PET bottles are distributed in the market, a label made of a material different from that of the container body and printed on the surface is attached to display the product name and contents.

  Used PET bottles are collected separately by local governments for recycling. Recycling is promoted to use as a raw material for fiber regeneration by separating polyethylene terephthalate from collected PET bottles. In addition, promotion of use as a raw material for recycled PET bottles is planned.

By the way, PET bottles collected as resource waste are collected and transported in a randomly compressed state so that the volume is not bulky. Among them, there are cases in which paper or plastic labels remain in the container body and are mixed. In order to effectively recycle PET bottles, it is necessary to separate these different substances such as labels. In order to do that, it was necessary to remove the label manually using a cutter knife or the like, so a huge amount of time was required, and the one whose shape was extremely deformed by compression could only be incinerated. For mechanized ones, a method of crushing PET bottles and separating them by wind separation is performed (for example, refer to the technique described in the patent document shown below). The problem was the poor purity.
JP 2003-291144 A

  Therefore, an object of the present invention is to provide an apparatus capable of accurately and quickly separating a main body of plastic containers such as a plastic bottle and labels attached thereto.

  The present invention comprises means for crushing plastic containers such as plastic bottles with labels attached thereto, and means for separating and collecting the labels separated by crushing and the main body of the containers. Is a separating apparatus for plastic containers. The crushing means is composed of a rotary blade or a rotary blade and a fixed protrusion (hereinafter also referred to as “baffle plate”) arranged so as not to interfere with the rotation trajectory of the tip portion. The means for separating and collecting is configured such that the crushed PET bottle falls while the labels peeled off using an air stream are floated. In this case, the airflow is an ascending airflow that flows from the bottom to the top of the apparatus. A rotary blade that crushes plastic containers such as plastic bottles can be configured to generate an updraft by its rotation, thereby allowing two functions to coexist.

  That is, the separation device for plastic containers according to the present invention includes a rotating blade in a casing that is sealed with a bottom plate and a top plate, and does not interfere with the inner wall of the casing from the top and bottom of the rotating blade. A baffle plate is provided. It is also possible to attach a blade that controls the airflow to the tip of the rotary blade. As a result, the rotating blade rotates in one direction, so that it is possible to generate an ascending air flow with a vortex in the housing more efficiently. An upper side of the housing is provided with an inlet for feeding plastic bottles, and an outlet for discharging the crushed plastic bottle is provided below the housing. A discharge port for labels is provided in the upper part of the housing.

  The apparatus for separating plastic containers of the present invention crushes a plastic bottle by a synergistic action of a rotary blade and / or a rotary blade and a fixed blade installed in a housing, and peels off a label attached to the plastic bottle. At the same time, the label peeled off by the rising air flow accompanied with the vortex generated in the housing can be floated upward to separate the crushed plastic bottle falling downward, and each can be taken out from another outlet. In this way, it is possible to accurately and quickly separate the plastic bottle casing and the label that is a different material attached thereto.

  That is, the separation device for plastic containers according to the present invention includes an inlet for feeding a plastic container with labels attached thereto, a first outlet for discharging a plastic bottle from which a label has been removed and crushed, and a pet A housing having a second discharge port for discharging the label peeled from the bottle is provided. The inside of the housing is mounted radially around the rotating shaft, and the PET bottle is crushed by the rotational movement of the rotating shaft, and an air flow is generated from the first outlet to the second outlet in the housing. A rotary blade and a baffle plate arranged so as not to interfere with the rotary blade are provided.

  The rotating blades that are mounted radially around the rotating shaft and the baffle plate that is arranged so as not to interfere with the rotating blades are provided inside the housing, so that the labels remain attached by the rotating blade and the baffle plate. The plastic container is crushed, the labels and the plastic container body are separated, and air is selected by the air flow generated by the rotation of the rotary blade, and each is discharged from the first discharge port and the second discharge port. Yes.

  According to the present invention, the rotary blade installed in the casing, or the rotary blade and the baffle plate cooperate to have various shapes, compressed indiscriminately and extremely deformed and compressed into a lantern shape or a bandit shape. Even if PET bottles are mixed and introduced, the bottle body and labels can be separated and recovered. Thereby, the purity of the flakes of PET bottles recycled and recycled can be increased. Moreover, since the rotary blade and the baffle which crush a plastic bottle are stored in a housing | casing and the plastic bottle and label which are crushed do not scatter around, it can work safely and efficiently.

  The plastic container separating apparatus of the present invention, as typified by a commercially available PET bottle, is a plastic container main body, and the contents, the manufacturer's display or the product name, etc. are printed on it. It is an apparatus that can separate and collect labels. In the following description, a plastic bottle with a label attached is used as an example. However, the present invention is not limited to this, and even containers having different purposes and uses have similar shapes or configurations. Can be applied to various things.

  The apparatus includes an inlet for feeding a PET bottle with a label attached to a cylindrical casing, a first outlet for discharging a crushed PET bottle from which the label has been removed, and the pet. And a second outlet for discharging the label peeled from the bottle. The inlet for feeding the PET bottle with the label attached and the second outlet for discharging the peeled label are provided above the center of the housing, and the first outlet for discharging the crushed PET bottle is a housing. Is provided below.

  The internal structure of the housing is equipped with a rotary blade that is mounted radially around the rotation axis and a baffle plate that is arranged so as not to interfere with the rotary blade, thereby crushing the plastic bottle. . The baffle plates are provided so as to sandwich the tip portion of the rotary blade from above and below, but are arranged so as not to interfere with each other. The plastic container separating apparatus of the present invention peels the label from the plastic bottle by effectively operating the rotary blade and the baffle plate. In other words, PET bottles can be crushed with a rotating blade, and in addition to this, even when a PET bottle is sandwiched between the rotating blade and a baffle plate, even compressed PET bottles can be crushed well and the labels are peeled off. It is possible to do.

  A plurality of rotary blades are preferably provided along the longitudinal direction of the rotary shaft, and are attached in multiple stages so as to cross each other. Of the rotary blades mounted in multiple stages, at least one rotary blade may have a blade plate attached to its tip. By attaching the slats, when the rotary blade is rotated around the rotation axis, it is possible to efficiently generate an updraft accompanied by a vortex from the bottom to the top of the housing. In the configuration of such a rotary blade, the rotary blade installed at the upper side mainly functions for crushing the PET bottle, while the rotary blade installed at the lower side and attached with the blade is sufficiently A function of further crushing a plastic bottle that has not been crushed and efficiently generating an air flow is provided. That is, the rotary blade functions to crush the PET bottle and has a function of generating an ascending airflow accompanied with a vortex. At this time, the first exhaust port provided below the housing serves as an air intake port, and the second exhaust port serves as an air exhaust port.

  The cross-sectional shape of the rotary blade does not necessarily have a sharp blade shape at the end, but is a rod shape, a flat plate shape, etc., with an appropriate gap so that a crushed plastic bottle falls. Any configuration is acceptable. In order to generate an airflow by rotation, a twist may be included like a propeller. The same applies to the baffle plate fixed to the inner wall of the housing. The shape of the baffle plate is not particularly limited as long as it is arranged so as not to interfere with the rotation of the rotary blade, and various shapes such as a rectangular shape and a conical shape are used. be able to. For the purpose of pinching and crushing PET bottles with a rotating blade and a baffle plate, micro protrusions may be formed on their surfaces, making the surface difficult to slip on the surface of the rotating blades, for example by making the surface a satin finish It is preferable to keep it.

  The PET bottle thrown in from the loading port is rotated under the influence of the rotary blade, and is accordingly scattered toward the inner wall of the housing by centrifugal force. The baffle plate provided on the inner wall of the housing collaborates with the rotary blade to crush the PET bottles that have been blown to the inner wall by centrifugal force and separate the labels and the PET bottles. The peeled labels are floated without falling due to the air flow generated by the rotation of the rotary blade, are collected on the air flow, and are discharged from the second discharge port. You may arrange | position a 2nd discharge port at the front-end | tip of the connection pipe connected to the housing so that label discharge may be carried out toward the outer side from the inner side of a housing | casing. By providing an auxiliary blower in the middle of the connecting pipe, it is possible to more efficiently generate an airflow that flows from the inside to the outside of the housing, and it is possible to further promote the discharge of labels. On the other hand, the crushed PET bottle falls without being floated by the airflow in the housing due to its weight. By providing multiple stages of rotating blades along the longitudinal direction of the rotating shaft, the PET bottle will be crushed by the action of the rotating blade and baffle plate multiple times while falling, and the label and PET bottle Can be separated. Thereby, even if it is a plastic bottle extremely compressed and formed into a bandit, the label can be surely removed. Eventually, the PET bottle from which the label has been peeled is discharged from the first discharge port provided below the housing.

  As described above, according to the separation device for plastic containers of the present invention, it is possible to perform wind selection by crushing and airflow using the rotary motion of the rotary blade within the housing. From the two outlets, a container body such as a PET bottle and labels attached thereto can be separated and collected.

  Next, embodiments of the present invention will be described with reference to the drawings. Note that in the drawings referred to below, the same portions or portions having similar functions are denoted by the same reference numerals, and repetitive description thereof is omitted.

  A side view of the plastic container separating apparatus according to the first embodiment is shown in FIG. 1, and a corresponding top view is shown in FIG. Therefore, in the following description relating to this embodiment, both FIG. 1 and FIG. 2 will be referred to.

  The casing 10 molded into a cylindrical shape is formed of a rigid plate and is fixed by a gantry 11 so that the injected PET bottles are not scattered unnecessarily. The housing 10 has an inlet 12 for feeding plastic containers such as PET bottles, a first outlet 13 for discharging the PET bottles from which the labels have been removed, and a second outlet 14 for discharging the labels. Is provided.

  The charging port 12 is provided in the upper part of the housing 10, and the introduction path 22 is provided in a spiral shape along the outer peripheral portion of the side wall of the cylindrical housing 10. This spiral introduction path has an effect of preventing splashes from jumping out of the housing 10 when the plastic bottle is crushed. In addition, there is an effect of promoting the generation of vortex flow inside the housing 10.

  A first discharge port for discharging the plastic bottle that has been crushed after the labels have been removed is provided in the lower portion of the housing 10. Since the housing 10 is fixed to the gantry 11 by bolts, nuts, welding, or the like, the first discharge port 13 attached to the lower side portion of the housing 10 can be disposed at a position higher than the floor surface, and the opening portion can be formed. By providing it slightly downward, it is easy to discharge and collect the crushed PET bottles.

  The second discharge port 14 provided in the upper part of the housing 10 is a place for discharging and collecting the labels peeled from the plastic bottle, and is provided at the tip of the connecting pipe 19 attached to the top plate of the housing 10. Collection of labels is made easy. Further, the auxiliary blower 20 is installed in the connecting pipe 19 connected to the housing 10 to generate an air flow that flows from the inside to the outside of the housing 10, thereby further facilitating the discharge of labels.

  The rotary blade 16 is radially attached to the rotary shaft 15 and is rotated by the main motor 21. FIG. 3 is a diagram for explaining the details of the rotary shaft 15 and the rotary blade, and shows a state where a plurality of rotary blades 16 are alternately attached to the rotary shaft 15 in a radial manner. In particular, the rotary blades 16 are preferably attached in multiple stages so as to cross each other in the longitudinal direction of the rotary shaft 15. A blade plate 23 may be attached to the tip of some of the rotary blades 16. This vane plate 23 is warped, and by rotating the rotary blade 16 in one direction around the rotary shaft 15, it is possible to efficiently generate an air flow from below to above.

  As shown in FIG. 1, a baffle plate 17 is provided inside the housing 10 so as to sandwich the tip of the rotary blade 16 from above and below. When a plurality of rotary blades 16 are provided, the baffle plates 17 and the rotary blades 16 are arranged alternately. By arranging in this way, the plastic bottle put into the housing can be sandwiched in the gap between the rotary blade 16 and the baffle plate 17 and efficiently and crushed efficiently.

  According to such a plastic container separating apparatus, a labeled plastic bottle or a plastic bottle with a label that has been compressed indiscriminately and deformed and compressed into a lantern shape or a bandit shape in the following manner is used. The main body can be separated and recovered.

  The rotating blade 16 that rotates in the housing 10 has a blade plate 23 attached to the tip of at least a part of the rotating blade 16 to generate a rising airflow. That is, an updraft is generated with a vortex that sucks air from the first discharge port 13 and discharges air from the second discharge port 14. The PET bottle thrown in from the loading port 12 is rotated by the influence of the rotary blade 16 and is accordingly scattered on the inner wall of the housing 10 by centrifugal force. A baffle plate 17 is provided on the inner wall of the casing 10, and the plastic bottles that are blown to the inner wall by centrifugal force are crushed by the rotary blade 16 or the rotary blade 16 and the baffle plate 17. In addition, the plastic bottles that are extremely compressed and in the form of bandits will have their labels removed by the impact of colliding with the baffle.

  Labels that are formed thinner than PET bottles float under the influence of rising airflow, whereas relatively heavy PET bottles fall while being crushed by the rotary blade 16. The crushed plastic bottle falls to the bottom plate 18 and is discharged from the first discharge port 13. The airflow in the housing 10 flows out from the second discharge port 14 ahead through the connecting pipe 19 attached to the top plate of the housing 10. Since the labels are carried out on the airflow, they can be collected from the second outlet 14. Since the auxiliary blower 20 provided on the upper portion of the housing 10 can collect the airflow inside the housing 10 in the pipe, it can effectively act to discharge labels.

  As described above, according to the plastic container separating apparatus in the first embodiment, the two blades provided in the housing 10 are different from each other by performing wind selection by crushing and airflow using the rotational motion of the rotary blade 16. Thus, the main body of the plastic bottle and the labels attached thereto can be taken out separately.

  FIG. 4 shows a side view of the plastic container separating apparatus in the second embodiment, and FIG. 5 shows a corresponding top view. Accordingly, in the following description relating to this embodiment, reference is made to both FIG. 4 and FIG.

  A casing 10 formed in a cylindrical shape with a rigid plate is fixed by a gantry 11. Inside the housing 10, a rotating shaft 15 and a rotating blade 16 attached thereto are provided. The rotating shaft 15 is configured to rotate by transmitting the power of the main motor 21. The details of the rotary blade 16 are the same as those described in the first embodiment with reference to FIG. 3, and it is preferable to provide a plurality of rotary blades 16 radially about the rotary shaft 15. A baffle plate 17 is provided on the inner wall of the housing 10 so as to sandwich the tip of the rotary blade 16 from above and below. The baffle plate 17 is formed of a block-like rigid body, and is attached to the inner wall of the housing 10 by fixing means such as welding or bolts and nuts so as to be alternately arranged with the rotary blades 16. With such a configuration, the plastic bottle put into the housing can be sandwiched in the gap between the rotary blade 16 and the baffle plate 17 and efficiently and crushed efficiently.

  As a typical configuration, 12 rotary blades 16 can be provided substantially by penetrating through the rotating shaft 15 six rigid plates provided with a through-hole in the center. That is, the six-stage rotary blade 16 is formed. The blade 23 is attached to the lower two tips. By adopting such a configuration, the upper four rotary blades 16 mainly function for crushing the plastic bottles, and the lower two sheets are auxiliary for further crushing the plastic bottles that have not been sufficiently crushed. In addition to a typical function, the function of the tip blade plate 23 to generate an updraft accompanied by a vortex can be made to coexist by the rotation of the rotary blade 16.

  A plastic bottle loading port 12 is provided at the top of the housing 10. The charging port is provided with a first fixed loading motor 24 and a second fixed loading motor 25, and the plastic bottles inserted from the charging port 12 are sequentially encased by a pressing plate 26 attached to the rotating shaft of the motor. It is a mechanism to send it into the interior of 10. Even if a large amount of PET bottles are introduced from the loading port once by these fixed amount carrying-in motors, they are not directly fed into the housing 10 and are continuously fed into the housing 10 so that the main motor 21 is overloaded. It is possible to prevent the rotation from stopping.

  A bottom plate 18 is provided at the lower part of the housing 10, and a first discharge port 13 formed by forming a through-hole in the vicinity thereof is provided. From the 1st discharge port 13, the PET bottle which was crushed by the rotary blade 16 and the baffle plate 17 in the inside of the housing 10, and labels were peeled is discharged.

  A small-diameter through-hole is opened in the upper part of the housing 10, and a connecting pipe 19 is connected in accordance with the position. The connecting pipe 19 corresponds to a path for discharging labels from the inside to the outside of the housing 10, and a tip of the connecting pipe 19 serves as a second discharge port 14 for discharging the labels. An auxiliary blower 20 is disposed in the middle of the connecting pipe 19 to generate an air flow from the inside to the outside of the housing 10 to further promote the discharge of labels.

  According to such a plastic container separating apparatus, a plastic bottle with a label or a plastic bottle with a label that has been compressed indiscriminately and deformed and compressed into a lantern shape or a bandit shape is appropriately inserted from the inlet 12. Thus, the label and the container body of the PET bottle can be automatically separated and collected. That is, an appropriate amount of the labeled plastic bottle introduced from the loading port 12 is sequentially transferred into the housing 10 by the first fixed amount carry-in motor 24 and the second fixed amount carry-in motor 25. With this mechanism, since a large number of PET bottles are not carried into the housing 10 at a time, the load state for the main motor 21 is constant, and a constant rotation speed can be maintained. Thereby, the advantage that damage to the main motor 21 can be prevented is provided. Further, it is possible to avoid damaging the rotating shaft 15 and the movable parts of the belt and gears connecting the rotating shaft 15 and the main motor 21.

  The rotating blade 16 that rotates in the housing 10 has a blade plate 23 attached to the tip of at least a part thereof, and sucks air from the first discharge port 13 and discharges air from the second discharge port 14. An air current with such a vortex is generated. As a result, an updraft is generated inside the housing 10. The PET bottle thrown in from the loading opening 12 rotates under the influence of the rotary blade 16 and, at the same time, scatters toward the inner wall of the housing 10 by centrifugal force. The plastic bottle is crushed by the rotary blade 16 or the rotary blade 16 and the baffle plate 17.

  Since the labels are thin and light, they float under the influence of the rising airflow, while the relatively heavy PET bottle falls while being crushed by the rotary blade 16. By providing a plurality of rotary blades 16 and arranging them on the rotary shaft 15 in multiple stages, the plastic bottle is crushed by the action of the rotary blade 16 and the baffle plate 17 a plurality of times, and the label and the plastic bottle are more reliably Can be separated. Thereby, even if it is a plastic bottle extremely compressed and formed into a bandit, the label can be surely removed. The dust generated along with the crushing rises together with the labels by the rising airflow generated by the rotary blade 16. By the auxiliary action of the auxiliary blower 20, the labels and dust are discharged from the second outlet 14 through the connecting pipe 19 from the inlet. The second discharge port 14 is provided with a container such as a bag that has pores such as paper, cloth, or non-woven fabric and allows air to permeate and collect dust of a certain size or more. The dust generated by this treatment can be prevented from diffusing around.

  As described above, according to the plastic container separating apparatus of the second embodiment, the rotary motion of the rotary blade 16 is used to perform wind selection by crushing and airflow, and two different exhausts provided on the housing 10 are provided. From the outlet, the main body of the plastic bottle and the labels attached thereto can be separated and recovered.

It is a figure which shows the side view of the separation apparatus of the plastic containers in a 1st Example. It is a figure which shows the top view of the separation apparatus of the plastic containers in a 1st Example. It is a figure explaining the detail of the rotating shaft 15 and rotary blade in a 1st Example. It is a figure which shows the side view of the separation apparatus of the plastic containers in 2nd Example. It is a figure which shows the top view of the separation apparatus of the plastic containers in 2nd Example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Housing 11 Base 12 Loading port 13 1st discharge port 14 2nd discharge port 15 Rotating shaft 16 Rotary blade 17 Baffle plate 18 Bottom plate 19 Connecting pipe 20 Auxiliary blower 21 Main motor 22 Introduction path 23 Blade plate 24 1st fixed_quantity | distribution motor 25 Second constant delivery motor 26 Press plate

Claims (5)

A loading port for loading a plastic container with labels attached thereto, a first outlet for discharging a plastic bottle from which the label has been removed and crushed, and a second outlet for discharging a label peeled from the plastic bottle A main body provided with a discharge port;
The plastic bottle is mounted radially inside the main body around the rotation shaft, and the plastic bottle is crushed by the rotational movement of the rotation shaft, and an air flow is generated from the first discharge port to the second discharge port inside the main body. An apparatus for separating plastic containers, comprising: a rotating blade to be moved; and a baffle plate disposed so as not to interfere with the rotating blade. A loading port for loading a plastic container with labels attached thereto, a first outlet for discharging a plastic bottle from which the label has been removed and crushed, and a second outlet for discharging a label peeled from the plastic bottle A main body provided with a discharge port;
Inside the main body, provided with a rotary blade radially mounted around the rotation axis, and a baffle plate arranged so as not to interfere with the rotary blade,
The rotary blade and the baffle plate crush the plastic container with the labels attached thereto, separate the labels and the plastic container main body, and wind-select by the air current generated by the rotation of the rotary blade, An apparatus for separating plastic containers characterized by being discharged from the first discharge port and the second discharge port.   3. The apparatus for separating plastic containers according to claim 1, wherein the loading port is provided with a fixed amount carry-in motor and a pressing plate rotated thereby.   The apparatus for separating plastic containers according to claim 1 or 2, wherein a plurality of rotary blades are provided along the longitudinal direction of the rotary shaft and are mounted in multiple stages so as to cross each other.   5. The plastic container separating apparatus according to claim 4, wherein a blade plate is attached to a tip of at least one of the plurality of rotary blades.

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