JP3648082B2 - Vibrating screen - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention is used for sorting objects to be sorted such as non-burnable garbage, oversized garbage, construction waste, etc., and relates to an improvement of a vibrating screen that is screened while being sorted.
[0002]
[Prior art]
In general, incombustible waste or the like separately collected in a bag for resource recycling is first broken by a bag breaker and then crushed by a crusher. Next, the incombustible waste that has been crushed is sent to a vibrating screen after iron is collected by a magnetic separator, and is screened according to the size of the screen. By the sorting process using the vibrating screen, a burden on a sorting machine such as a subsequent round sorter or an aluminum sorter is reduced.
[0003]
FIG. 3 is a schematic perspective view showing an example of a conventional vibrating screen. The vibrating screen has a trough 10 having a substantially concave cross-sectional shape, and a slit-shaped eye 11a (gap between the trough 10 and the trough 10). ) And a plurality of plate-like support members 12 which are disposed below the screen 11 and support the screen 11 in the trough 10, and are supplied onto the screen 11. The sorting object 13 such as incombustible waste and oversized waste is screened while being conveyed.
[0004]
Thus, the to-be-sorted items 13 such as incombustible waste and oversized waste that have been subjected to bag breaking, crushing, and iron removal processing by the bag breaker, crusher, and magnetic separator are first upstream of the screen 11 (see FIG. 3). Diagonally to the upper right).
[0005]
The objects to be sorted 13 supplied on the screen 11 are sequentially conveyed from the upstream side (oblique upper right side in FIG. 3) to the downstream side (oblique lower left side in FIG. 3) while receiving vibration on the screen 11. Going to be. During this time, small items (such as earth and sand, glass pieces, ceramic pieces, etc.) in the object to be sorted 13 pass through the eyes 11a of the screen 11 and fall onto the trough 10, and the trough 10 is subjected to a vibration action on the trough 10. It is sequentially transported from the upstream side to the downstream side, and is dropped and discharged out of the trough 10 from the discharge port 10a formed at the downstream end of the trough 10.
[0006]
On the other hand, large items (relatively large incombustible materials, paper, cloth, plastic, wood pieces, aluminum cans, etc.) in the objects 13 that have not passed through the eyes 11a of the screen 11 continue on the screen 11 from upstream. It is transported to the downstream side, and is dropped and discharged from the trough 10 from the downstream end of the screen 11.
[0007]
In this way, the objects to be sorted 13 such as incombustible waste are sorted by the vibrating screen into the objects to be sorted 13 having a certain size or larger and the objects to be sorted 13 having a smaller size than the certain size.
[0008]
[Problems to be solved by the invention]
By the way, in the conventional vibrating screen, since the support member 12 that supports the screen 11 in the trough 10 is arranged in a grid pattern at a lower position of the screen 11, the interval W between the support members 12 is set. It is relatively narrow. However, since the eyes 11a of the screen 11 are formed in a slit shape, even if the object to be sorted 13 is longer than the width of the eyes 11a of the screen 11 included in the object 13 to be sorted. During transportation, when the posture becomes parallel along the eyes 11 a of the screen 11, it sometimes passes through the eyes 11 a of the screen 11 and falls onto the trough 10.
[0009]
Therefore, the conventional vibrating screen has a problem that the long object 13 falls from the screen 11 onto the trough 10 and is caught in a bridge shape between the support members 12 having a relatively small interval. (See FIG. 4). When the object to be sorted 13 is caught between the support members 12, the flow of the object to be sorted 13 on the trough 10 is hindered, and the object to be sorted 13 stagnate on the trough 10, resulting in poor conveyance. In this case, the operation of the vibrating screen was temporarily stopped, and it was necessary to remove the object to be sorted 13 caught on the support member 12.
[0010]
The present invention has been made in view of such problems, and the object thereof is to prevent the object to be sorted from being caught by the screen support material and prevent the conveyance of the object to be sorted on the trough. It is to provide a vibrating screen.
[0011]
[Means for Solving the Problems]
In order to achieve the above object, the present invention comprises a screen for sieving a material to be sorted supported by a plurality of support members disposed below the screen in a trough, and transports the material to be sorted supplied on the screen. However, in a vibrating screen that is sifted into large and small, the support materials are arranged in a staggered manner so that the distance between the support materials is wide, and the object to be transported that has dropped from the screen onto the trough is placed between the support materials. It is characterized by not getting caught.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a schematic perspective view showing an example of a vibrating screen according to an embodiment of the present invention. The vibrating screen includes a trough 1 supported in a swingable manner, and a screen 2 disposed in the trough 1. The non-combustible waste that is composed of a plurality of support members 3 that support the screen 2 in the trough 1 and a drive unit 4 that vibrates the trough 1 and the screen 2 is subjected to bag breaking, crushing, and iron removal. In addition, the sorting process can be performed while conveying the object to be sorted 5 such as bulky garbage.
[0013]
The trough 1 is formed in a substantially concave shape by a metal plate such as a steel plate, and has a rectangular bottom wall 1a and both end portions of the bottom wall 1a (oblique upper left portion and oblique lower right portion in FIG. 1). The left and right side walls 1b are connected to each other vertically, and the upstream side walls 1c are connected to the upstream end of the bottom wall 1a (obliquely upper right portion in FIG. 1).
The trough 1 is arranged in an inclined posture in which the downstream side (oblique lower left side in FIG. 1) is slightly lower than the upstream side (oblique upper right side in FIG. 1), and a spring or the like is attached to a fixed member (not shown). Is supported so as to be swingable through an elastic support (not shown).
Further, the bottom wall 1a portion on the downstream side of the trough 1 is formed with a discharge port 1d opened downward to discharge a small object 5 that has passed through the screen 2 and dropped onto the trough 1. Has been.
[0014]
In addition, on the upstream side of the trough 1, an object supply port (illustrated) for supplying an object to be sorted 5 such as incombustible waste and bulky waste that has been subjected to bag breaking, crushing, and iron removal treatment onto the screen 2. (Omitted) is formed.
Further, on the downstream side of the trough 1, a discharge port (not shown) for discharging a large object to be sorted 5 remaining on the screen 2 is formed in addition to the above-described discharge port 1 d.
[0015]
The screen 2 is arranged in the trough 1 in a posture parallel to the bottom wall 1a of the trough 1, and the object 5 to be sorted such as incombustible waste thrown into the trough 1 is covered with a certain size or more. The selection object 5 and the to-be-sorted object 5 having a size less than a certain size are screened.
That is, the screen 2 has a strip metal plate 2a such as a plurality of steel plates in a posture along the longitudinal direction of the trough 1 (from diagonally upper right to diagonally lower left in FIG. 1) and in the width direction of the trough 1 (from diagonally upper left in FIG. 1). (Slightly lower right direction) and arranged in parallel with a certain interval, and formed by forming a large number of slit-like eyes 2b (clearances) that allow the passage of smaller objects 5 between the belt-like metal plates 2a. Has been.
The width W ₁ of the eyes 2b of the screen 2 is set so as to gradually increase from the upstream side (oblique upper right side in FIG. 1) to the downstream side (oblique lower left side in FIG. 1). It is possible to prevent clogging due to the object to be sorted 5 conveyed on the top.
[0016]
The screen 2 is supported in the trough 1 by a plurality of support members 3 arranged below the screen 2.
The plurality of support members 3 support the screen 2 so that the flow of the object to be selected 5 is not obstructed when the object to be selected 5 dropped on the trough 1 is conveyed from the upstream side to the downstream side on the trough 1. It is made of a long metal plate such as a steel plate.
In addition, each support member 3 has a bottom wall of the trough 1 in a posture along the conveying direction of the object to be sorted 5 (from the diagonally upper right to the diagonally lower left direction in FIG. 1) and so that the interval W ₂ between the support members 3 is widened. It is arranged in a staggered pattern on 1a, and its upper and lower ends are fixed to the bottom wall 1a of the trough 1 and the lower surface of the screen 2 by welding or the like. In this way, the support members 3 are arranged in a staggered manner on the bottom wall 1 a of the trough 1, and the distance W ₂ between the support members 3 is widened, so that the objects dropped from the eyes 2 b of the screen 2 onto the trough 1 are covered. It is possible to prevent the selected item 5 from being caught between the support members 3.
[0017]
It should be noted that the distance W ₂ between the support members 3, the number of the support members 3, etc. Is selected so as to flow smoothly and smoothly on the trough 1 from the upstream side to the downstream side without being caught between the support members 3.
Further, the upstream end of each strip-shaped metal plate 2a forming the screen 2 is fixed to the upstream side wall 1c of the trough 1 by welding or the like.
Further, among the strip-shaped metal plates 2 a forming the screen 2, the strip-shaped metal plates 2 a at the left and right ends are fixed to the left and right side walls 1 b of the trough 1 by welding or the like.
[0018]
The drive unit 4 vibrates the trough 1 and the screen 2 with a constant frequency and amplitude, and is linked to the trough 1. A conventionally known vibrator (vibrator) is used for the vibrating portion.
[0019]
Thus, in the vibrating screen having the above-described configuration, the objects to be sorted 5 such as incombustible garbage and oversized garbage, which have been subjected to bag breaking treatment, crushing treatment, and iron removal treatment by a bag breaking machine, a crushing machine, and a magnetic separator, respectively, It is supplied to the upstream side of the screen 2 (oblique upper right side in FIG. 1).
[0020]
The object to be sorted 5 supplied on the screen 2 is coupled with the fact that the entire vibrating screen is tilted and vibrated, and on the screen 2 while being vibrated on the screen 2 (see FIG. 1). It is sequentially conveyed from the diagonally upper right side to the downstream side (diagonal lower left side in FIG. 1). During this time, the objects to be sorted 5 (earth and sand, glass pieces, ceramic pieces, etc.) smaller than the width W ₁ of the eyes 2b of the screen 2 pass through the eyes 2b of the screen 2 and drop onto the trough 1, and the trough 1 The trough 1 is sequentially conveyed from the upstream side to the downstream side on the bottom wall 1 a of the trough 1, and is dropped and discharged out of the trough 1 from the discharge port 1 d formed at the downstream end of the trough 1.
[0021]
In addition, since the screen 2 for sieving the object to be sorted 5 gradually increases in width W _{1 of the} eyes 2b from the upstream side to the downstream side, the object to be sorted 5 is screened during sieving of the object to be sorted 5. Even if the screen 2 is likely to become clogged, the object 5 to be sorted is pushed downstream by the object 5 moving on the screen 2 from the upstream side to the downstream side, and gradually becomes wider. It will fall on the trough 1 from the eye 2b, and clogging will be prevented.
[0022]
On the other hand, relatively large items (large incombustible materials, paper, cloth, plastic, wood pieces, aluminum cans, etc.) in the objects to be sorted 5 that have not passed through the eyes 2b of the screen 2 continue on the upstream side of the screen 2 ( 1 is transported from the diagonally upper right side of FIG. 1 to the downstream side (diagonal lower left side of FIG. 1), and is dropped and discharged from the downstream end of the screen 2 to the outside of the trough 1 through a discharge port (not shown).
[0023]
By the way, in the vibrating screen, the size of the object to be sorted 5 falling from the screen 2 onto the trough 1 is defined by the width W ₁ of the eye 2 b of the screen 2. Accordingly, the object to be sorted 5 larger than the width W ₁ of the eyes 2b of the screen 2 or the elongated object 5 which is also longer than the width W _{1 of the} eyes 2b is basically from the screen 2 to the trough 1. It will not fall.
However, in the case of the object to be sorted 5 that is longer than the width W ₁ of the eyes 2b of the screen 2, the eyes of the screen 2 are in a parallel posture along the slit eyes 2b during conveyance. It may fall on the trough 1 through 2b. In this case, the object to be selected 5 may be caught in a bridge shape between the support members 3 arranged on the trough 1 to obstruct the flow of the object to be selected 5.
However, in the above-described vibrating screen, a plurality of support members 3 that support the screen 2 are arranged in a staggered manner between the trough 1 and the screen 2 so that the interval W ₂ between the support members 3 is widened. Therefore, even if the long object to be sorted 5 falls on the trough 1, it does not get caught in a bridge shape between the support members 3, and the trough 1 can be smoothly and upstream from the upstream side to the downstream side. It is transported smoothly (see FIG. 2).
[0024]
In this way, the objects to be sorted 5 are subjected to the sorting process by the vibrating screen into the objects to be sorted 5 having a certain size or more and the objects to be sorted 5 having a size smaller than a certain size. Thereafter, the object to be sorted 5 subjected to the sorting process is continuously sent to the next processing step.
[0025]
In the above embodiment, the entire vibrating screen is arranged in an inclined posture in which the downstream side is slightly lower than the upstream side. However, in other embodiments, the entire vibrating screen is horizontally disposed. You may make it arrange | position with an attitude | position.
[0026]
In the above-described embodiment, the width W ₁ of the eyes 2b of the screen 2 is gradually increased from the upstream side toward the downstream side. However, in other embodiments, the eyes of the screen 2 The widths W ₁ of 2b may all be the same interval.
[0027]
In the above embodiment, the eyes 2b of the screen 2 are formed in a slit shape. However, in other embodiments, the eyes 2b of the screen 2 may be formed in a mesh shape.
[0028]
In the above embodiment, the support member 3 that supports the screen 2 is formed in a long plate shape. However, in another embodiment, the support member 3 may be formed in a rod shape. good.
[0029]
【The invention's effect】
As is clear from the above description, the vibrating screen of the present invention is arranged in a staggered manner to support the screen so that the space between the supporting materials is wide. Even when a material to be sorted longer than the size falls, the material to be sorted is smoothly and smoothly conveyed from the upstream side to the downstream side on the trough without being hooked between the support members.
As a result, the vibrating screen according to the present invention does not impede the flow of the objects to be sorted on the troughs that are successively fed by the objects to be sorted caught in a bridge shape between the supporting materials. The removal work of the object to be sorted caught in the container is also unnecessary.
[Brief description of the drawings]
FIG. 1 is a schematic perspective view showing an example of a vibrating screen according to an embodiment of the present invention.
FIG. 2 is a plan view showing a main part of a vibrating screen.
FIG. 3 is a schematic perspective view of a conventional vibrating screen.
FIG. 4 is a plan view showing a main part of a conventional vibrating screen.
[Explanation of symbols]
1 is a trough, 2 is a screen, 3 is a support material, 5 is an object to be selected, and W ₂ is an interval between the support materials.

Claims (1)

In the vibrating screen, the screen for sorting the objects to be sorted is supported in the trough by a plurality of support members arranged below the screen, and the screened materials to be sorted are conveyed to the large and small size while being conveyed. The vibrating screen is characterized in that the support materials are arranged in a staggered manner so that the distance between the support materials is wide, and the object to be transported that has dropped from the screen onto the trough is not caught between the support materials. .

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