JP3408143B2 - Wind sorting means - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wind force separating means for separating solids from each other by a gas flow, and in particular, a lightweight material such as a bag or vinyl sheet, a medium weight material such as a can or a plastic bottle, or a glass. Suitable for separation from heavy items such as bottles,
For example, the present invention relates to a wind power sorter suitable for a waste recycling facility for recovering reusable components such as cans, bottles and plastic bottles from the recovered waste and reusing them as resources.

[0002]

2. Description of the Prior Art Depending on the flow of gas, for example, bags or vinyl
Japanese Patent Application Laid-Open No. 8-309287, Japanese Patent Application Laid-Open No. 8-309286, and Japanese Patent Application Laid-Open No. 8-309286 disclose a wind power sorter for separating lightweight materials such as lucite from medium-weight materials such as cans and plastic bottles or heavy materials such as glass bottles. JP-A-57-48274,
The wind power sorting device described in Japanese Patent Laid-Open No. 5-64771 is known.

Among such known wind power sorting devices, for example, a wind power sorting device for sorted refuse disclosed in Japanese Patent Laid-Open No. 8-309287 is shown in FIG. In this figure, there is provided a mesh-shaped exhaust screen 2 which is wound in a trackless manner so as to face the air ejection nozzle 1a of the nozzle header 1. Then, the winding-side end of the mesh-shaped exhaust screen 2 is provided at a position outside the range in which the air flow from the air jet nozzle 1a collides, and the lightweight chute 3 is provided below the winding-side end. It is provided.

Further, at the entrance of the light-weight chute 3, a roller 4 facing the exhaust screen 2 and driven in the winding direction of the exhaust screen 2 is provided. In such a configuration, by using the flow of the air ejected from the air ejection nozzle 1a, the objects to be sorted carried by the input conveyor are affected by the medium-weight substance that is influenced by the air flow and the influence of the air flow. Difficult heavy objects are selected by utilizing the difference in the flight distance, while light objects are flown to the mesh-shaped exhaust screen 2 facing the air jet nozzle 1a. The mesh-shaped exhaust screen 2 is rotated to a position outside the range where the air flow collides, that is, to the solid exclusion part of the exhaust screen 2 that excludes the lightweight object pressed against the screen surface. Move and collect lightweight items.

[0005]

However, the following problems occur in such a conventional wind power sorter. (1) Many of the objects to be sorted contain sewage, and this sewage becomes a mist through the lightweight object 5 or by the flow of air and adheres to the exhaust screen 2, The exhaust screen 2 becomes sticky. Then, the lightweight object 5 that should fall due to the action of gravity may not fall at the winding-side end of the exhaust screen 2 that is located outside the range where the air flow collides.

In this case, as the mesh-shaped exhaust screen 2 moves, the lightweight object attached to the mesh-shaped exhaust screen 2 is peeled off by the exhaust screen outer frame (outer wall) at the winding-side end of the exhaust screen 2. The expected effect (scraper effect) is expected. However, due to the structure, a certain amount of space is required between the mesh-shaped exhaust screen 2 that is rolled up and the fixed outer frame. Further, due to manufacturing error or the like, the distance may be increased, and the lightweight object 5 may pass through the narrow distance.

When the lightweight object 5 passes through this narrow space, the lightweight object 5 moves to the back side together with the movement of the mesh-shaped exhaust screen 2 and is carried to a position where there is a flow of air from the air ejection nozzle 1a. It is blown away by the air flow and scattered around the device. (2) Due to the structure of the exhaust screen, it is necessary to open a mesh of a certain size to allow air to pass therethrough. Therefore, fine particles such as dust and dust smaller than this mesh will be screened.
The air that has passed through the exhaust screen and passed through the exhaust screen has a structure to be discharged to the outside of the device, so that minute objects such as dust and dust are scattered around the device. (3) As described above, the sewage from the objects to be sorted becomes mist-like through the lightweight material or by the flow of air and adheres to the exhaust screen 2, so that the exhaust screen 22 has adhesiveness. In this case, dust and dirt flying along with the flow of air from the air ejection nozzle 1a easily adhere to the exhaust screen 2, and when adhered, they dry and harden.

By repeating this, a layer of dust and dust that adheres to the exhaust screen 2 grows. Therefore, if it is used for a long period of time, the size of the mesh will be reduced and finally it will be blocked. In order to prevent this, periodical cleaning is required, and labor required for cleaning work is frequently required. (4) As described above, due to the adhesion and growth of dust and dirt on the exhaust screen 2, the size of the exhaust screen 2 becomes small, and the resistance when the air from the air ejection nozzle 1a passes through the exhaust screen 2 becomes large. Become. Since there is no air escape path other than the exhaust screen 2 and a plurality of chutes through which the objects to be sorted fall, the amount of air escaping to each chute increases from the design time because the ventilation resistance of the exhaust screen 2 increases. With the flow of the air, the lightweight material directly flows into the chutes other than the lightweight material chute 3.

Therefore, the longer the time of use, the greater the amount of lightweight material mixed in the chutes other than the lightweight material chute 3. (5) Further, in the conventional wind power sorting apparatus, there is a problem that the working environment of the facility is deteriorated, and the above-mentioned problem that the sorting ability is deteriorated with the lapse of usage time. And to prevent this,
There is also a problem that the exhaust screen 2 needs to be frequently cleaned, the labor required for the cleaning work is frequently required, and the efficiency is poor because the exhaust screen 2 cannot be continuously used for a long time.

The present invention has been made in view of the above-mentioned problems of the prior art, and it is possible to reliably remove the light objects adhering to the exhaust screen on the light object chute, and to remove fine particles such as dust and dust around the apparatus. It is possible to prevent it from scattering to the outside, and there is no change in performance such as entry of lightweight objects into chutes other than lightweight chutes due to dust and dirt adhering to the exhaust screen, and continuous use for a long time. It is an object of the present invention to provide a wind power sorting means that is capable of and is efficient.

[0011]

In order to achieve the above object, the wind force selection means of the invention according to claim 1 separates solids from each other by a gas flow from a gas injection nozzle,
In the wind-powered selection means having an exhaust screen at the discharge part of the gas flow, the exhaust screen removing the solids flying by the gas flow and pressed against the screen surface, in the gas flow downstream side of the solid removal part of the exhaust screen, It is characterized in that a solid exclusion nozzle for ejecting gas toward the solid exclusion portion is provided.

According to a second aspect of the present invention, a wind force that separates the supplied solids by the difference in the flight distance by the gas flow from the gas ejection nozzle that is arranged below the terminal end of the solid supply unit and that is directed obliquely upward. In the selection means, a plurality of chutes are provided below the gas flow from the gas ejection nozzle, and the chute arranged farthest from the gas ejection nozzle is used as a light weight chute for collecting light weight, and the gas flow In the wind screening means provided with an exhaust screen so that the solids removal unit for removing the solids that has come in and is pressed against the screen surface is located above the lightweight chute, in the gas flow downstream of the solids removal unit of the exhaust screen. On the side, a solid exclusion nozzle for ejecting a gas toward the solid exclusion portion is provided.

The solid exclusion portion of the exhaust screen is a position outside the range on the exhaust screen where the gas flow from the gas ejection nozzle collides, or a position farthest from the gas ejection nozzle, such as a lightweight object. The solid on the exhaust screen is the place on the exhaust screen where the force of the gas flow is weakened and the object pressed on the exhaust screen surface is the most likely to fall, and it is essential that there is a solid removal facility. Not. Therefore,
In the present specification, the solid exclusion portion of the exhaust screen is to be understood in the broadest sense.

According to a third aspect of the present invention, a part of the gas from the gas supply means for supplying the gas to the gas ejection nozzle is
It is characterized in that it is supplied to the solid exclusion nozzle. The invention according to claim 4 is characterized in that a gas inlet of gas supply means for supplying gas to the gas ejection nozzle is provided on the gas flow downstream side of the exhaust screen.

According to a fifth aspect of the present invention, an opening is provided side by side on the gas flow downstream side of the solids removal section of the exhaust screen so as to communicate with the outside and allow external air to flow to the gas suction port. Is characterized by. The invention according to claim 6 is characterized in that the opening is closer to a gas suction port of the gas supply means than the solid exclusion nozzle.

According to a seventh aspect of the invention, in the opening,
It is characterized in that means for adjusting the opening area is provided. The invention according to claim 8 is characterized in that the exhaust screen is a bar screen having a plurality of slits and provided with a pressing member that moves in the slits in a state of protruding from each slit toward the gas flow upstream side. And

The operation of the present invention will be described. Claim 1
In the invention according to the above aspect, for example, a lightweight object of solids that has flown by the gas flow from the gas ejection nozzle is pressed against the exhaust screen by the gas flow.
The pressed lightweight material is carried to its solids exclusion by the movement of the exhaust screen.

In the solid exclusion part of the exhaust screen,
Being sticky with sewage etc. with an exhaust screen,
Even if the lightweight object is difficult to separate, the lightweight object is blown off by the gas ejected from the solid exclusion nozzle toward the solid exclusion part of the exhaust screen, and falls into, for example, the lightweight object chute. At the same time, the eyes of the exhaust screen of the solid exclusion part are kept clean without clogging.

In the invention according to claim 2, the light weight of the solids is carried by the flow of the gas discharged from the gas jet nozzle, and is pressed against the exhaust screen against which the gas from the gas jet nozzle collides, Floating from the ejection nozzle to the lightest weight chute placed farthest.
On the other hand, for example, a medium-weight or heavy-weight object other than a light-weight object is not pressed against the exhaust screen and falls into a predetermined chute other than the light-weight object chute due to the gas flow.

The lightweight material pressed against the exhaust screen by the flow of gas is carried to the solids removal section by the movement of the exhaust screen. In the solid exclusion part of the exhaust screen, even if the exhaust screen is sticky and sticky, and it is difficult for the lightweight object to come off, the lightweight object moves from the solid exclusion nozzle to the solid exclusion part of the exhaust screen. It is blown away by the gas ejected toward and falls into, for example, a lightweight material chute. At the same time, the eyes of the exhaust screen of the solid exclusion part are kept clean without clogging.

In the invention according to claim 3, a part of the gas from the gas supply means for supplying the gas to the gas ejection nozzle can be supplied to the solid exclusion nozzle, and it is necessary to provide a gas supply means dedicated to the solid exclusion nozzle. Disappear. In the invention according to claim 4, for example, in the case of lightweight solids, a gas flow from the gas ejection nozzle and a gas flow attracted from a gas suction port provided on the gas flow downstream side of the exhaust screen are provided. Carried by the overlapping gas streams, they are pressed against the exhaust screen and float to the lightest chute located farthest from the gas ejection nozzle.

Dust and dust contained in the objects to be sorted,
A fine lightweight material smaller than the eyes of the exhaust screen is carried by the gas flow from the gas ejection nozzle, and even if it passes through the eyes of the exhaust screen, it is attracted from the gas suction port, and again,
Since it is supplied from the gas ejection nozzle via the gas supply means, there is an opportunity to be collected again. In the invention according to claim 5, a flow of air flowing into the gas suction port is generated from an opening located on the gas flow downstream side of the solid exclusion portion of the exhaust screen, and a part of this air flow is solid from the opening. It escapes from the screen back side of the exclusion part to the screen front side of the exhaust screen, merges with the gas flow from the gas ejection nozzle, again escapes from the central screen front side of the exhaust screen to the screen back side, and is attracted to the gas suction port.

Sewage generated from the object to be sorted by the flow of air passing from the back side of the screen of the exhaust screen solids removal section to the front side of the screen and the gas ejected from the solids removal nozzle toward the exhaust screen solids removal section. Even if it adheres to the exhaust screen and becomes sticky, the lightweight object is surely blown off, and falls and is collected in, for example, the lightweight object chute. At the same time, the eyes of the exhaust screen of the solid exclusion part are kept clean without clogging.

Even if the air flowing from the back side of the screen to the front side of the screen is not generated, the air flowing from the opening to the gas suction port is generated. Then, the gas flow to the gas suction port that is drawing in the gas ejected from the gas ejection nozzle, that is, the gas flow that acts to press the lightweight object against the exhaust screen, has extremely disappeared. It is easy to fall. Therefore, the gas flow from the solids exclusion nozzle works more effectively.

In the invention according to claim 6, the opening is
By setting the position closer to the solid exclusion nozzle,
The flow of gas ejected from the solids removal nozzle is not affected by the flow of air flowing from the opening to the gas inlet, and the lightweight product is ejected from the solids removal nozzle toward the solids removal part of the exhaust screen. The effect of blowing off can be accurately exhibited.

In the invention according to claim 7, by adjusting the opening area of the opening, the flow rate or flow velocity of the gas flowing from the opening to the gas suction port is adjusted. In the invention according to claim 8, for example, the lightweight object pressed against the bar screen by the gas flow from the gas ejection nozzle is
The pushing member projecting from the slit of the bar screen to the upstream side of the gas flow pushes the gas toward the solids removing portion and carries it. During this time, among the dust and dirt adhering to the bar screen, those between the slits of the bar screen are scraped off by the moving pressing member, and those on the surface of the bar screen are scraped while pressed against the bar screen. It is scraped off by something.

[0027]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. In addition, the embodiment described below,
It is an example of the case where the wind power sorting means of the present invention is applied to a recycling facility for separately collected garbage. In FIGS. 1 and 2, the wind force sorting means for separating solids from each other by a gas flow is equipped with a supply conveyor 10 for supplying sorted refuse (sorted objects).

As the supply conveyor 10, for example,
A vibration conveyor is applied, and a conveyor such as a belt conveyor is also applicable. The conveying outlet end of the supply conveyor 10 is inserted into the inside of the main body casing 11 of the wind-power sorting means through an opening 11a. In this case, the object to be sorted is supplied from the supply conveyor 10, but instead of the supply conveyor 10, the outlet of another device is directly attached so that the object to be sorted discharged from the device is supplied. Is also good.

At the end of the supply conveyor 10 located inside the main body casing 11, a light weight material (bags, sheets, etc.) and a heavy material (cans, bottles, plastic bottles, etc.) are separated with high accuracy. An object holding bar 12 is installed. Below the transport outlet end of the supply conveyor 10,
An air ejection nozzle 13 as a gas ejection nozzle is provided, and a tip ejection port 13A thereof has a main body casing 11
And penetrates inside the main body casing 11.

Air is supplied to the air jet nozzle 13 by a blower 14 as a gas supply means. An adjustable flow straightening plate 13B that adjusts the ejection direction of air is installed at the tip ejection port 13A of the air ejection nozzle 13, and the ejection direction of the air is obliquely above the conveying direction of the supply conveyor 10.

Further, a plurality of chutes are provided at the bottom of the main body casing 11 below the flow of the air jetted from the air jet nozzles 13 to sort the separated dust according to its weight or specific gravity. As a plurality of chutes, a heavy-weight chute 15 and a light-weight chute 16 are sequentially installed from the supply conveyor 10 side in a direction away from the chute 15.

The heavy items refer to items other than bags and sheets, that is, cans, bottles, plastic bottles, etc., and the light items refer to the bags and sheets. Here, the bar screen 1 is used as an exhaust screen that separates solids from each other by an air flow and eliminates solids that are blown by the air flow and pressed against the screen surface.
7 is provided.

That is, in the opening 11A (the air flow discharge portion from the air jet nozzle 13) opened on the upper surface of the main body casing 11 above the heavy-weight chute 15 and the light-weight chute 16 of the opening 11A. A bar screen 17 along the opening surface is provided so as to face the air ejection nozzle 13. A plurality of slits 17A are formed in the bar screen 17, and the slits 17A project from the slits 17A to the upstream side of the air flow from the air ejection nozzles 13, that is, in the state of projecting downward in FIG. Slit 17A
A claw 17B as a pressing member that moves inside is provided.

In the bar screen 17, the longitudinal direction of the slit 17A is the direction along the air flow (longitudinal direction).
Is set to. The vicinity of the end of the slit 17A in the moving direction of the claw 17B is the solid exclusion portion 17G of the bar screen 17, and is set at a position outside the range where the air flow collides, or farthest from the air ejection nozzle 13. A light material chute 16 for collecting light material is located below the solid exclusion portion 17G.

The bar screen 17 is bent downward at the upper portion of the lightweight material chute 16. The solid exclusion portion 17G of the bar screen 17 extends from the bending start point where the light weight chute 16 is bent downward to the end of the slit 17A. The bending start point of the bar screen 17 may be from the entrance of the lightweight chute 16, that is, the position above the partition wall 11B that separates the chutes 15 and 16 to the end of the slit 17A.
It is preferable that the bending starts from above the central portion of 6.

As shown in FIG. 2, the movable claw 17B is attached to and driven by an endless belt, for example, a bar 17D provided over two chains 17C wound in an endless track type. And the air jet nozzle 1
The claw 17B protruding to the 3 side moves from the supply conveyor 10 side (the heavy material chute 15 side) to the light material chute 16 side.

The two chains 17C are wound around a driving sprocket 17E and a driven sprocket 17F, and by the rotational driving of the driving sprocket 17E,
It is moved so that the claw 17B moves the slit 17A.
It is designed to move inside. The bar screen 1
The specific structure of 7 may be formed by parallel bars, rods, wires (wires), etc. Generally, flat steel is used and the thickness surfaces (side surfaces) of the flat steels are arranged so as to be on the front side. A structure is preferable in which spacers are provided at one end and the other end so that the openings (widths of the slits 17A) are evenly spaced and tightened and assembled with through bolts.

The aperture of the bar screen 17 is preferably as thin as possible, but may be about 10 to 30 mm. Further, depending on the size of the object to be sorted, it is possible to further increase the opening. Further, the partition wall portion 11 that separates the heavy-weight chute 15 and the light-weight chute 16 in the main body casing 11 from each other.
At the upper end of B, a guide roller 18 (see FIG. 8) is installed facing the bar screen 17.

The guide roller 18 is used for the bar screen 1
The claw 17B protruding to 7 rotates in the operating direction (clockwise in the figure). Bar screen 17 and guide roller 18
The interval is set to, for example, about 150 mm, but it is desirable to make it as small as possible as long as the lightweight object can move to the lightweight object chute 16 side.

On the other hand, on the downstream side of the air flow of the bar screen 17, that is, on the back side of the screen of the bar screen 17, an air suction port 11C communicating with the suction port of the blower 14 which is a gas supply means for supplying air to the air ejection nozzle 13.
Is provided. In addition, the solid exclusion portion 17G of the bar screen 17 communicates with the outside on the downstream side of the air flow, in other words, near the solid exclusion portion 17G of the bar screen 17 on the downstream side of the air flow, and external air is introduced into the air suction port 11C. An opening 11D is formed so as to flow.

Further, on the downstream side of the solid exclusion portion 17G of the bar screen 17 in the air flow, that is, the bar screen 17
In the vicinity of the solids removing portion 17G on the downstream side of the air flow, the solids removing nozzle 27 that ejects air toward the solids removing portion 17G.
Is provided. That is, in the main body casing 11,
Above the bar screen 17 position, the bar screen 1
A cover portion 11E that covers 7 is formed.

The air suction port 11C is provided substantially in the center of the cover 11E, and the air suction port 11C is connected to the suction port of the blower 14 via the air pipe 20. In addition, the bar screen 17 of the cover portion 11E
At the position corresponding to the solid exclusion portion 17G of
D is formed. The position in the vicinity of the solid exclusion part 17G where the opening 11D is formed may be any position corresponding to any of the solid exclusion parts 17G, but preferably in the vicinity of the side end of the cover part 11E.

The opening 11D is provided with means for adjusting the opening area. For example, as shown in FIG. 3, slide grooves 11b are provided on both side edges of the opening 11D of the main body casing 11, and both end edges of the opening adjusting plate 21 are slidably inserted and supported in the slide grooves 11b. Further, the fixing screw 22 is screw-fitted to the portion where the slide groove 11b is formed, and the slide groove 1 of the opening adjustment plate 21 is
The opening degree of the opening 11D is adjusted by a sliding operation along 1b, and the opening adjusting plate 21 is fixed by the fixing screw 22 at the adjusted position.

Further, the solid removal nozzle 27 is provided along the side portion inside the opening 11D of the cover portion 11E. That is, as shown in FIG. 3, a plurality of solids are arranged at predetermined intervals along the side of the bar screen 17 on the side distant from the air suction port 11C in both sides of the opening along the direction orthogonal to the longitudinal direction of the slit 17A. Exclusion nozzle 27
Is installed.

Due to the installation position of the solids removal nozzle 27, the position of the opening 11D is set substantially closer to the air suction port 11C than the solids removal nozzle 27. Tip ejection port 27A of each solid removal nozzle 27
Is directed from the opening 11D to the solid exclusion portion 17G of the bar screen 17.

The air supplied from the blower 14 is supplied to each of the solids removing nozzles 27 by the blower 14 and the air jet nozzle 13.
Are supplied via a first branch pipe 20A branched from an air pipe 20 connecting the two and a plurality of second branch pipes 20B further branched from the first branch pipe 20A. Is supported in the opening 11D by the second branch pipe 20B.

The solid removal nozzle 27 has the opening 11
Instead of being provided inside D, it may be provided near the outside of the opening 11D. In addition, as shown in FIG.
Air suction port 11 of both sides of the opening along the direction orthogonal to the longitudinal direction of slit 17A of bar screen 17 of D
Air inlet 27'a at one end on the side farther from C
At the other end, air jet outlets 27'b are respectively provided, and solid exclusion nozzles 27 'having a shape that widens from the air inlet 27'a to the air jet 27'b are installed. Good.

Air supplied from the blower 14 is supplied to the air introduction port of the solids removal nozzle 27 'via a first branch pipe 20A branched from an air pipe 20 connecting the blower 14 and the air jet nozzle 13. Supplied. Next, the operation of the wind power selection means having such a configuration will be described. The lightweight object A among the sorting objects supplied from the supply conveyor 10 into the main body casing 11 is the screen back side of the bar screen 17 where the air flow from the air ejection nozzle 13 collides with the air from the air ejection nozzle 13. The flow of air attracted from the air suction port 11C installed in the upper part (in the figure) is carried by the strong overlapping air flow and is pressed against the bar screen 17 installed facing the air ejection nozzle 13. Floating from the air ejection nozzle 13 to the lightest material chute 16 arranged furthest away.

On the other hand, heavy objects B other than the light object A do not reach the bar screen 17 and are not carried by the air flow and fall into the heavy object chute 15. That is, the heavy objects B of cans, bottles, and plastic bottles having a high specific gravity pass through between the lightweight object holding bars 12 and fall directly onto the heavy object chute 15, or under the influence of the air flow, the bar screen Lightweight chute 1 facing 17 and supply conveyor 10
6 collides with the wall 11B of the heavy load chute 15 in the vicinity of the entrance portion of 6, and falls into the heavy load chute 15.

The lightweight object A pressed against the bar screen 17 has a claw 17B protruding from the slit 17A of the bar screen 17 toward the upstream side of the air flow (downward in FIG. 1).
As a result, the flow of air from the air ejection nozzle 13 is raked toward a position outside the range of collision or a position farthest from the air ejection nozzle 13 to the solid exclusion portion 17G.

During this time, the slits 1 of the bar screen 17 out of dust and dust adhering to the bar screen 17
7B is scraped off by moving claw 17B, and the one on the surface of bar screen 17 is bar screen 17
It is scraped off by the lightweight object A that is pressed against the object. Then, in the solid exclusion portion 17G, which is located at a position outside the range where the air flow collides, or at the farthest position from the air ejection nozzle 13, the air flow pushing the lightweight object A against the bar screen 17 and the air sucking The gravity acting on the lightweight object A is superior to the force of the flow of
The lightweight material A falls on the lightweight material chute 16 provided at the lower part of this position. That is, above the light weight chute 16,
Air flow from the air ejection nozzle 13 and the air suction port 11
The air flow attracted from C disappears or becomes weak, and the lightweight object A falls due to gravity.

At this time, the sewage and the like contained in the supplied objects to be sorted adheres to the bar screen 17 through the lightweight object 5 or by the flow of air to adhere to the bar screen 17 and become sticky. Even if the lightweight object A is difficult to separate from the bar screen 17 or the moving claw 17B,
Since a solids removal nozzle 27 that ejects air toward the solids removal unit 17G is provided on the air flow downstream side (back side of the screen) of the solids removal unit 17G of the bar screen 17, it is separated from the bar screen 17 or the moving claw 17B. The hardened lightweight object A is reliably blown off by the air jetted from each solids removal nozzle 27 toward the solids removal portion 17G of the bar screen 17, and falls into the lightweights chute 16. Therefore, the slit 17A of the solid exclusion portion 17G is kept clean without clogging.

Further, in this apparatus, the air jet nozzle 13
A part of the air ejected from the solid ejection nozzle 27 leaks from the outlet of each chute, and the entire amount of air ejected from the air ejection nozzle 13 or the solid ejection nozzle 27 does not flow into the air suction port 11C. A flow of air that flows into the air suction port 11C from the upper opening 11D is always generated. Part of this air flow is the opening 1
1D to the screen back side of the bar screen 17 (above the bar screen 17 in FIG. 1) to the screen front side of the bar screen 17 (bar screen 1 in FIG. 1)
7), merges with the air flow from the air jet nozzle 13, and again passes from the center screen front side of the bar screen 17 (below the bar screen 17) to the screen back side (above the bar screen 17). , Is attracted to the air suction port 11C. The lightweight object A is caused by the flow of air from the back side of the bar screen 17 to the front side of the screen due to the action of gravity, and thus the lightweight object chute 16
Pushed to the side.

Therefore, by the synergistic action of this air flow and the air ejected from the solid exclusion nozzle 27,
Even if the sewage generated from the objects to be sorted adheres to the bar screen 17 and becomes sticky, the lightweight object A
Is reliably dropped and collected by the lightweight shoe 16 and the slit 17A of the solid exclusion portion 17G is kept clean without clogging.

Even if the air flow from the back side of the bar screen 17 to the front side of the screen is not generated, the air flow from the opening 11D to the air suction port 11C is generated.
In G, the flow of air to the air suction port 11C that draws in the air ejected from the air ejection nozzle 13, that is, the flow of air that acts to press the lightweight object against the bar screen 17 is extremely reduced. Therefore, lighter weight items are more likely to fall. Therefore, the air flow ejected from the solid removal nozzle 27 works more effectively.

In particular, the opening 11D is used as the solid exclusion nozzle 2
By setting the position closer to the air suction port 11C than 7, the flow of air ejected from the solids removal nozzle 27 is not affected by the flow of air flowing into the air suction port 11C from the opening 11D, and solids removal is performed. The effect of blowing and dropping the lightweight object A by the flow of the air ejected from the nozzle 27 toward the solid exclusion portion 17G of the bar screen 17 is properly exerted.

Since the opening adjusting plate 21 for adjusting the opening degree of the opening 11D is provided, the opening 1
The flow rate or the flow rate of the air flowing into the air suction port 11C from 1D can be adjusted, and the bar screen 1 can be adjusted according to the degree to which the sewage generated from the object to be sorted adheres to the bar screen 17.
It is possible to optimally adjust the force for pushing the lightweight object A due to the flow of air passing through 7 from above to below, and it is possible to more accurately drop and collect the lightweight object A on the lightweight object shoe 16.

In addition, as in this embodiment, a bar screen 17 having a plurality of slits 17A and having a claw 17B which moves in the slit 17A in a state of protruding from each slit 17A to the upstream side of the air flow is provided. As a result of the adoption, the claw 17B has moved to project to the upstream side of the air flow.
However, in the solid exclusion portion 17G, that is, in the portion where the slit 17A is bent to the upstream side of the air flow, the nail 17 is gradually retracted with respect to the slit 17A of the bar screen 17 that is sufficiently narrow for the size of the lightweight object A. The lightweight object A carried by being hooked on 17B is separated from the claw 17B by the scraper effect of the bar screen 17 and dropped into the lightweight object chute 16.

Therefore, even if the lightweight object A remains attached to the bar screen 17, it moves to the solids removing portion 17G of the bar screen 17 as the claw 17B moves, and is ejected from the solids removing nozzle 27. Due to the action of the air, even if the sewage generated from the object to be sorted adheres to the bar screen 17 and becomes sticky, the light object A surely falls and is collected in the light object shoe 16. To be done. In addition, the slit 17A of the bar screen 17
Is kept clean without clogging in the entire area by the movement of the claw 17B and the air flow ejected from the solid exclusion nozzle 27.

The lightweight material A that has floated on the air flow from the air jet nozzle 13 or has peeled off from the middle of the bar screen 17 is lightened by the guide roller 18 provided at the entrance of the lightweight material chute 16. Is quickly drawn into the lightweight chute 16 without accumulating at the entrance of the lightweight chute 16. It should be noted that dust and dust contained in the objects to be sorted supplied by the supply conveyor 10 and a minute lightweight object A that is smaller than the interval between the slits 17A of the bar screen 17 will not follow the air flow from the air ejection nozzle 13. The slit 17A of the bar screen 17
Even if it passes through, it is attracted from the air suction port 11C installed on the upper part of the bar screen 17 and is again supplied from the air ejection nozzle 13 via the blower 14, so that it is possible to be collected again.

Further, depending on the situation of supply of the objects to be sorted, when the heavy goods B such as cans, bottles, and plastic bottles are overlapped and supplied on the bags A, the lightweight goods A, etc. With the following action of the lightweight article holding bar 12, the lightweight article A is prevented from receiving the weight of the heavy article B and falling onto the heavy article chute 15. That is, from the lower end portion of the supply conveyor 10 to the bar-shaped lightweight object holding bars 12 that are attached in a plurality in the width direction of the supply conveyor 10 so as to cross the flow of air from the air ejection nozzles 13, the lightweight object A is weighed. Receive the weight of the object B and place the heavy object B on the light object A.
Even if the object is dropped while riding, due to the size and flexibility of the lightweight object A, the heavy object B on the lightweight object A is held while the lightweight object A is held by the lightweight object holding bar 12. It falls on the heavy-weight chute 15 from between the bars 12. The lightweight object A, which was held down by the weight of the heavy object B, rides on the flow of air from the air ejection nozzle 13 due to the removal of the heavy object B and flies toward the bar screen 17.
This prevents the lightweight object A from receiving the weight of the heavy object B and falling onto the heavy object chute 15.

In the above embodiment, the heavy load chute 15 is selected so that the heavy load B and the light load A are sorted.
The light-weight object chute 16 and the light-weight object chute 16 are sequentially installed from the supply conveyor 10 side in the direction away from the supply conveyor 10, but as shown in FIG. 5, heavy objects (bottles etc.) B and medium-weight objects (cans, plastic bottles). Type) C and light weight items (bags, sheets, etc.) A so that the heavy weight chute 15, the medium weight chute 19 and the light weight chute 16 are separated from the supply conveyor 10 side. They may be installed in order.

In this case, when the heavy goods B having a high specific gravity are supplied from the supply conveyor 10, they pass through the light weight holding bars 12 and fall directly into the heavy goods chute 15. Further, when the cans and the plastic bottles, which are the medium-weight materials C having a relatively low specific gravity, are supplied from the supply conveyor 10, they are affected by the flow of air and are light in weight facing the bar screen 17 and the supply conveyor 10. It collides with the wall of the medium weight chute 19 reaching the entrance of the material chute 16 and falls into the medium weight chute 19.

Bags, sheets, and the like, which are lightweight items A having a low specific gravity, fall on the lightweight item chute 16 by the same action as that of the embodiment shown in FIGS. As described above, according to the wind force selection means of this configuration, the bar screen 1
The air suction port 11C of the blower 14 that supplies air to the air ejection nozzle 13 is provided on the downstream side of the air flow of No. 7, and
A solids removal nozzle 27 for ejecting air toward the solids removal unit 17G is provided on the downstream side of the solids removal unit 17G of the bar screen 17, and a downstream of the solids removal unit 17G of the bar screen 17 on the air flow side. , An opening 11 communicating with the outside and allowing the outside air to flow to the air suction port 11C
Since D is installed side by side, it is possible to prevent fine particles such as dust and dust from scattering around the device, and the sewage generated from the objects to be sorted is bar screen 17
It is possible to easily drop the lightweight material A by dropping it onto the lightweight material shoe 15 even if it adheres to the surface and becomes tacky.

Further, in the above embodiment, the lightweight object pressed against the bar screen 17 fixed by the flow of air from the air jet nozzle 13 is moved by the claw 17B which moves in the slit 17A of the bar screen 17,
The structure is such that the air is flown above the light-weight chute 16 or the solid ejection part 17G, which is the farthest position from the air ejection nozzle 13, and the claw 17B is gradually retracted into the slit 17A of the bar screen 17. Therefore, when the claw 17B retracts, a lightweight object is not caught by the slit 17A,
It is reliably separated and drops by the air jetted from the solids removal nozzle 27. As a result, there is no need to clean the dust and dirt adhering to the bar screen 17, and the dust and dirt adhere to the bar screen 17 so that the performance of the device (a light object enters a chute other than the light object chute 16) can be improved. There is no change and surely removes the lightweight objects attached to the bar screen 17 on the lightweight object chute 16,
It has advantages such as no scattering of lightweight objects around the device.

In the above embodiment, the moving structure of the claw 17B projecting the bar screen 17 toward the air ejecting nozzle 13 is the bar 1 extending over the two chains 17C.
Although the example in which the claw 17B is attached to the 7D and the claw 17B is moved is given, as shown in FIG.
A means for installing a plurality of claws 17B attached to the shaft 23 in the rotation direction of the shaft 23 and feeding may be further used. Further, although not shown, a rod-shaped member provided with a plurality of claws is moved vertically and horizontally by a crank mechanism so as to be discharged from the slit. For example, when the claws protrude, the inside of the slit may be moved to the solids removing portion side and returned to the original state in the retracted state. In short, a scraping means for a lightweight object may be used.

The claw need not be moved continuously, but the claw may be moved intermittently or periodically.
Further, in the above embodiment, the bar screen 1
Although the example in which 7 is bent downward at the upper part of the light weight chute 16 is installed, as shown in FIG. 7, the bar screen 17 is straight and the bar screen 17 is provided with a claw 17B protruding toward the air ejection nozzle. Chain 1 whose track is a track that moves diagonally upward above the lightweight chute
It is also possible to use a combination of a bar screen and a claw having another shape such as a configuration of 7C. In this case, the solid exclusion portion 17G of the bar screen 17 extends from the position on the bar screen 17 where the track of the claw 17B moves obliquely upward in the upper part of the lightweight chute to the end of the slit 17A.
Becomes

Further, in the above-described embodiment, in the shape of the claw 17B projecting to the air ejection nozzle 13 side, an example in which a bar-shaped member crosses the bar screen 17 perpendicularly to draw a lightweight object is shown. However, it is also possible to use a method of scraping a lightweight object with a nail having a different shape such as a method of manufacturing a nail with a flat plate or a method of installing the nail with respect to the bar screen 17 with the angle of the nail inclined with respect to the vertical.

Further, in the above-described embodiment, the guide roller 18 is configured to rotate and drive a pipe-shaped member as shown in FIG. 8. However, the guide roller 18 has a blow-through hole through which a part of the air flow blows. May be provided. For example, as shown in FIG. 9, a pipe-shaped guide roller 18 is provided with holes 18A forming blow-through holes on the surface thereof, or, as shown in FIG. 10, a mesh-like material whose meshes are blow-through holes. Guide roller 18 formed with a pipe
May be

The unique function of the guide roller 18 having the blow-through hole will be described with reference to FIG. That is, in FIG. 11 (A), the lightweight object A is pressed against the outer peripheral surface of the guide roller 18 by the flow of air, and in FIG. 11 (B), it is pressed against the outer peripheral surface of the guide roller 18 by the rotation of the guide roller 18. The lightweight object A is rotationally moved, and in the same figure (C), the air blown through the guide roller 18 causes the lightweight object A to peel off from the outer peripheral surface of the guide roller 18.

In the above embodiment, the air suction port 11C is installed above the bar screen 17, air is drawn by the blower 14, and the air is jetted again from the air jet nozzle 13 and the solid removal nozzle 27. I gave an example,
A dust collector such as a cyclone is installed between the air suction port 11C and the blower 14, and after collecting fine substances such as dust and dust in the air that has passed through the bar screen 17, with the dust collector. Inviting with a blower, air jet nozzles 13, 27
From the bar screen 1
It is possible to prevent clogging of both nozzles due to dust and the like in the air that has passed through 7.

In the above embodiment, the bar screen 17 is provided on the ceiling of the main body casing 11 of the apparatus, but as shown in FIG.
It may be provided on the inclined wall or vertical wall of 1 '. In this case, a plurality of chutes 24 to 26 are provided below the air flow, and the chute 26 arranged furthest from the air ejection nozzle 13 is used as a lightweight object chute for collecting lightweight objects. The solid removal portion 17G may be located in the vicinity of the slit end portion in the moving direction of, and the solid removal portion 17G may be positioned closer to the lightweight object chute 26.

At this time, the longitudinal direction of the slits of the bar screen 17 does not have to be a parallel direction (longitudinal direction) along the air flow as in the previous embodiment, but a direction perpendicular to the air flow (lateral direction). Alternatively, it does not matter even if it is in an oblique direction having a predetermined angle with the air flow. Further, as shown in FIG. 13, the lightweight chute 26 may of course be provided at a position where an air flow to the side of the air intake port 11C does not occur.

Further, in each of the above-mentioned embodiments,
As the exhaust screen, a bar screen 17 having a plurality of slits 17A and having a claw 17B (pushing member) that moves in the slit 17A in a state of protruding from each slit 17A to the upstream side of the air flow is adopted. Thirteen
As shown in, a mesh-shaped exhaust screen 2 may be adopted.

Further, in each of the above embodiments, the wind power sorting means according to the present invention is shown as an example of a single wind power sorting means. Of course, it may be installed in another device such as a bag-breaking sorting machine by being provided in a bag-breaking machine that breaks existing garbage bags.

[0076]

As described above, according to the first aspect of the present invention.
According to the wind force selection means of (2) and (2), since the solid exclusion nozzle for ejecting gas toward the solid exclusion portion is provided on the gas flow downstream side of the solid exclusion portion of the exhaust screen, the exhaust screen is attached. It becomes sticky with sewage and can be blown off even if it is difficult to remove a lightweight object.
For example, it is possible to reliably remove the light objects attached to the exhaust screen on the lightweight chute, prevent the exhaust screen from being clogged, and attach dust or dust to the exhaust screen, for example, the lightweight chute. Other than that, there is no change in performance such as entry of lightweight objects into the chute, stable and continuous use is possible, and efficient wind power sorting can be performed.

According to the third aspect of the invention, it is not necessary to provide a gas supply means dedicated to the solids removal nozzle, and the equipment cost can be kept low. According to the invention of claim 4, the gas flow from the gas ejection nozzle and the gas flow attracted from the gas suction port provided on the gas flow downstream side of the exhaust screen are overlapped with each other to form a solid. Since they are separated from each other, the capacity of the blower can be utilized to the maximum extent, and the efficiency is small, and the small, lightweight objects that have passed through the eyes of the exhaust screen are attracted from the gas suction port, and the gas supply means is re-established. Since it is supplied from the gas ejection nozzle via the above, there is an opportunity to be collected again.
It is possible to prevent fine particles such as dust and dust from scattering around the device.

According to the fifth aspect of the present invention, the screen of the exhaust screen solids removing section has a structure in which the flow of air flowing into the gas suction port is generated from the opening on the downstream side of the gas flow of the solids removing section of the exhaust screen. By the synergistic effect of the flow of air that escapes from the back side to the front side of the screen and the gas ejected from the solids removal nozzle toward the exhaust screen solids removal part, the sewage generated from the sorting object adheres to the exhaust screen. Even if it becomes sticky, the lightweight objects will surely fall and be collected.

Even if there is no air flow from the back side of the exhaust screen to the front side of the screen, the air flow from the opening to the gas suction port is generated. The gas flow acting as a pressing force is extremely small, and thus the lightweight object is more likely to fall, and the gas flow from the solid exclusion nozzle works more effectively.

According to the invention of claim 6, the opening is
By setting it at a position closer to the gas suction port than the gas ejection nozzle for solids removal, the flow of gas ejected from the solids removal nozzle is not affected by the flow of air flowing from the opening to the gas suction port, The effect of blowing off a lightweight object by the gas ejected from the exclusion nozzle toward the solid exclusion portion of the exhaust screen can be accurately exhibited.

According to the invention of claim 7, by adjusting the opening area of the opening, the flow rate or flow velocity of the air flowing from the opening to the gas suction port can be adjusted. As a result, for example, a lightweight object is exhausted by the air flow. The force of peeling from clean can be adjusted, and lightweight objects can be dropped and collected more accurately. According to the invention of claim 8, there is no need to clean the dust and the dust adhering to the exhaust screen (bar screen), and the device performance (for example, other than the lightweight chute other than the light weight chute is eliminated by the dust and the dust adhering to the exhaust screen. There is no change in that light items get into the chute)
It has the advantages that the lightweight material attached to the exhaust screen is reliably removed on the lightweight material chute or the like, and the lightweight material is not scattered around the device.

[Brief description of drawings]

FIG. 1 is a front cross-sectional view showing an embodiment of a wind force selection unit according to the present invention.

FIG. 2 is an exploded perspective view of the above embodiment.

3A and 3B are diagrams showing a configuration of an adjustment plate for an opening and a configuration of a solid exclusion nozzle in the above embodiment, FIG. 3A is a plan view, and FIG. 3B is a sectional view taken along the line AA in FIG.

FIG. 4 is a diagram showing another example of the configuration of the adjustment plate for the opening and the configuration of the solid exclusion nozzle according to the above embodiment,
(A) is a plan view, (B) is a sectional view taken along the line AA in (A).

FIG. 5 is a front cross-sectional view of another embodiment.

6A and 6B are views showing another example of the moving structure of the claw, where FIG. 6A is a schematic perspective view and FIG. 6B is a front sectional view.

FIG. 7 is a front sectional view showing another example of the moving structure of the bar screen and the claw.

FIG. 8 is a schematic perspective view showing a configuration of a guide roller in each of the above-described embodiments.

FIG. 9 is a schematic perspective view showing the configuration of another example of the guide roller in each of the above-described embodiments.

FIG. 10 is a schematic perspective view showing the configuration of another example of the guide roller in each of the above-described embodiments.

11A to 11C are schematic diagrams illustrating the operation of each guide roller in FIGS. 9 and 10.

FIG. 12 is a front sectional view showing another example of the installation position of the exhaust screen.

FIG. 13 is a plan sectional view of another embodiment.

FIG. 14 is a plan cross-sectional view showing the configuration of a conventional wind power sorting device.

[Explanation of symbols]

2 exhaust screen 10 Supply conveyor 11C air inlet 11D opening 13 Air jet nozzle 14 blower 15 Heavy goods chute 16 Lightweight Shoot 17 bar screen 17A slit 17B nail 17G Solid Exclusion Unit 19 medium weight shoots A lightweight B heavy goods C medium weight 20 air piping 20A First branch pipe 20B Second branch pipe 21 Opening adjustment plate 27 Solid exclusion nozzle 27 'Solid exclusion nozzle

─────────────────────────────────────────────────── --- Continuation of the front page (56) References JP-A-8-309287 (JP, A) JP-A-5-273 (JP, A) JP-A-6-198210 (JP, A) Actual development Sho-61- 204682 (JP, U) West German patent application publication 2522148 (DE, A1) (58) Fields investigated (Int.Cl. ⁷ , DB name) B07B 1/00-15/00

Claims (8)

(57) [Claims] 1. A wind force provided with an exhaust screen at a discharge part of the gas flow, which separates solids from each other by a gas flow from a gas jet nozzle and removes solids which come flying by the gas flow and are pressed against the screen surface. In the sorting means, a solids removing nozzle for ejecting gas toward the solids removing section is provided on the gas flow downstream side of the solids removing section of the exhaust screen. 2. A wind force selection means for separating the supplied solids from each other by the difference in the flight distance thereof by a gas flow from a gas ejection nozzle which is arranged below the terminal end of the solid supply part and is directed obliquely upward, A plurality of chutes are provided below the gas flow from the gas ejection nozzle, and the chute arranged farthest from the gas ejection nozzle is used as a light weight chute for collecting light weight objects, and the chute placed by the gas flow flies to the screen surface. In the wind sorting means provided with an exhaust screen so that the solid excluding part for excluding the solid pressed against is located above the lightweight chute, in the gas flow downstream side of the solid excluding part of the exhaust screen, the solid A wind force selection means, characterized in that a solid exclusion nozzle for ejecting gas toward the exclusion portion is provided. 3. The wind force selection unit according to claim 1, wherein a part of the gas from the gas supply unit that supplies the gas to the gas ejection nozzle is supplied to the solid exclusion nozzle. 4. A gas flow downstream side of the exhaust screen,
The wind power selection means according to any one of claims 1 to 3, further comprising a gas suction port of a gas supply means for supplying gas to the gas ejection nozzle. 5. An opening, which is in communication with the outside and allows external air to flow to the gas suction port, is provided on the downstream side of the solid exclusion portion of the exhaust screen in the gas flow direction. The wind force selection means according to any one of 1 to 4. 6. The wind force selection means according to claim 5, wherein the opening is closer to the gas suction port of the gas supply means than the solid removal nozzle. 7. The wind power selection means according to claim 5, wherein the opening is provided with a means for adjusting the opening area thereof. 8. The exhaust screen is a bar screen having a plurality of slits and provided with a pressing member that moves in the slits in a state of protruding from each slit toward the upstream side of the gas flow. Item 9. The wind force selection device according to any one of items 1 to 8.