JP2018043201A - Flow inhibition tool for screen of sieve device, screen for sieve device, and sieve device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide: a screening efficiency improvement tool for a screen of a sieve device having improved screening efficiency; the screen of the sieve device having improved screening efficiency; and the sieve device having improved screening efficiency.SOLUTION: Screening efficiency improvement tools 61, 62, 63 are erected on a screen 5 of a sieve device 1 for inputting a screening object from the upstream side and discharging a screened residual from the downstream side, inhibiting flow of the screening object in the interval between the upstream and the downstream of the screen 5. A residence time on the screen 5 of the screening object is adjusted to be long.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a sieving device, and more particularly to a sieving efficiency improvement tool for a screen of a sieving device, a screen for a sieving device, and a sieving device, which can increase the time during which a sieving object stays on the screen. .

  A sieving apparatus is used to continuously separate a large amount of objects including solids of various sizes by size.

  As such a sieving device, there is one shown in Patent Document 1. The sieving apparatus described in Patent Document 1 performs a sieving process by putting a crushed product that is a sieving object into a sieving net that is a screen. The crushed product that has been input is separated into a solid that passes through the screen and a solid that remains on the screen in the process of flowing from upstream to downstream of the sieve screen.

Japanese Patent Laid-Open No. 10-52650

  In the sieving apparatus as shown in Patent Document 1, the sieving object is placed on the sieving mesh due to various factors such as sieving motion conditions, the shape and size of the sieving object, and the shape and arrangement of the screen holes. In the process of flowing from upstream to downstream, there is a problem that the sieving object cannot be sufficiently separated for each size and the sieving efficiency is not improved.

  Therefore, from the above points, the present invention provides a sieving efficiency improvement tool for a screen of a sieving apparatus with improved sieving efficiency, a screen of a sieving apparatus with improved sieving efficiency, and a sieving apparatus with improved sieving efficiency. The purpose is to provide.

  In order to solve the above-mentioned problems, the sieving efficiency improvement tool according to claim 1 is erected on a screen of a sieving apparatus in which a sieving object is introduced upstream and a residue screened downstream is discharged. The flow of the sieving object is hindered between the upstream side and the downstream side of the screen, and the time for the sieving object to stay on the screen is lengthened.

  According to the sieving efficiency improvement tool of claim 1, since the time for which the sieving object stays on the screen is lengthened, the sieving efficiency can be improved. Therefore, it is not necessary to separately provide a line for returning the sieving object that has not been sufficiently separated from the downstream to the upstream of the screen, or it is possible to reduce the number of times of returning by the return line. Therefore, energy required for sieving can be suppressed.

  The sieving efficiency improving tool according to claim 2 is the sieving efficiency improving tool according to claim 1, wherein the sieving efficiency improving tool is freely attached to and detached from the screen.

  According to the sieving efficiency improvement tool of the second aspect, the same function as the sieving efficiency improvement tool of the first aspect is achieved, and it can be attached to the screen of the existing sieving apparatus. Moreover, it becomes possible to attach to the arbitrary positions of a screen so that the time which a sieving target object stays on a screen can be made longer. Therefore, sieving efficiency can be further improved according to the sieving object or sieving motion.

  The sieving efficiency improving tool according to claim 3 is the sieving efficiency improving tool according to claim 1 or 2, wherein the sieving efficiency improving tool has corners or sharp edges formed by two flat surfaces or two curved surfaces. The tip of these corners and sharp edges includes those arranged to face in the direction opposite to the direction of flow of the sieving object.

  The sieving object may be a mass of a plurality of solids. If the mass is larger than the pores of the screen, the mass cannot pass through the screen. Therefore, a plurality of solids constituting the lump are discharged from the downstream without being sieved. According to the sieving efficiency improvement tool of claim 3, the sieving efficiency improvement tool acts in the same manner as the sieving efficiency improvement tool of claim 1 or 2, and the corner of the sieving efficiency improvement tool in the process of the mass flowing from upstream to downstream. When hitting a part or pointed edge, the mass is divided into a plurality of solids. Since the separated solid can be sieved with a screen, further improvement in sieving efficiency can be realized.

  The sieving efficiency improving tool according to claim 4 is the sieving efficiency improving tool according to claim 3, wherein the sieving efficiency improving tool guides the flow of the sieving object toward the corner and the sharp edge. Including those provided.

  According to the sieving efficiency improvement tool of claim 4, in addition to acting similarly to the sieving efficiency improvement tool of claim 3, toward the corners and sharp edges of the sieving efficiency improvement tool of claim 3. The sieving efficiency improvement tool according to claim 4 guides the flow of the sieving object. Thereby, it is possible to improve the probability of colliding a lump contained in the sieving object and larger than the hole of the screen with the corners and sharp edges of the sieving efficiency improvement tool of claim 3. By this collision, the lump is divided into a plurality of solids. Since the separated solid can be sieved with a screen, further improvement in sieving efficiency can be realized.

  The sieving efficiency improvement tool according to claim 5 is the sieving efficiency improvement tool according to any one of claims 1 to 4, wherein the sieving efficiency improvement tool is a screen that extends in the width direction of the screen and extends from upstream to downstream. Including those provided to guide the flow of the sieving object from the vicinity of the outer edge toward the center in the width direction of the screen.

  In the sieving device, in order to support the screen, a hole may not be formed in the vicinity of the outer edge of the screen. Therefore, in the vicinity of the outer edge of the screen that faces the width direction of the screen and extends from upstream to downstream, it becomes a region where the sieving object cannot be sieved. If the sieving object flows in this region from the upstream to the downstream, the sieving efficiency may be reduced.

  According to the sieving efficiency improving tool of claim 5, the sieving target portion that flows in the vicinity of the outer edge of the screen is operated in the width direction of the screen in addition to the same function as the sieving efficiency improving tool of any of claims 1 to 4. By guiding toward the center, the sieving efficiency can be improved.

  The screen for a sieving apparatus according to claim 6 is a screen of a sieving apparatus in which a sieving object is introduced into the upstream side, and the residue screened on the downstream side is discharged. Has a sieving efficiency improvement tool.

  The sieving apparatus according to claim 7 is a sieving apparatus having a screen into which a sieving object is introduced on the upstream side and a residue screened on the downstream side is discharged. Prepare.

  The screen for the sieving device according to claim 6 and the sieving device according to claim 7 have the same operational effects as any one of claims 1 to 5.

  The sieving efficiency improvement tool according to any one of claims 1 to 5, the screen for the sieving device according to claim 6, and the sieving device according to claim 7 can achieve excellent sieving efficiency.

It is a schematic perspective view from the side surface direction of the sieve apparatus which has a sieving efficiency improvement tool of this invention. It is a schematic perspective view from the front direction of the sieve apparatus of FIG.

  A sieve device 1 according to an embodiment of the present invention will be described with reference to the drawings.

  As shown in FIG. 1, the sieving device 1 includes a gantry 2, a sieving support 3 that is swingably attached to the gantry 2, and a sieving body 4 that is supported by the sieving support 3.

  The object screened by the sieving device 1 of the present embodiment is a wood chip.

  The gantry 2 accommodates a drive unit 21 that moves the sieve support 3. The drive unit 21 moves the sieve support 3 so that the sieve support 3 and the sieve body 4 move together.

  The sieve body 4 is a substantially rectangular box in top view. In the perspective view from the side surface direction of FIG. 1, the sieve body 4 is upstream on the right side and downstream on the left side. Further, in the perspective view from the front direction of FIG. 2, the sieve body 4 has an upstream side on the upstream side and a downstream side on the near side. In the perspective view from the front direction of FIG. 2, the sieve body 4 has a lateral direction in the width direction.

  As shown in FIGS. 1 and 2, the sieve body 4 has an upstream wall 41 and side walls 42 and 42. There is no wall on the downstream side of the box body 4 and it is open. A screen 5 is laid in the space surrounded by the upstream wall 41 and the side walls 42, 42. The side walls 42, 42 are in the vicinity of the outer edge of the screen 5 that faces the width direction of the screen 5 and extends from upstream to downstream. In the present embodiment, the surface of the screen 5 is inclined from the upstream side toward the downstream side.

  A sieving object is placed on the upstream side of the screen 5. As the sieving body 4 moves, the sieving object that has been introduced flows on the screen 5 in the downstream direction. In the present embodiment, the screen 5 performs a turning motion in a plane.

  As shown in FIG. 1, the screen 5 is provided with a number of holes 51 having a predetermined size. Among the sieving objects flowing on the screen 5, those smaller than the holes 51 pass through the screen 5 and are sieved. The sieving object is sieved, and the residue remaining on the screen 5 is discharged from the open part on the downstream side of the box body 4. The passing material that has passed through the screen 5 through the hole 51 is discharged from the passing material discharge port 43 below the screen 5 and slightly upstream from the position where the residue is discharged.

  On the screen 5, an inverted V-shaped plate 61 and flow guide plates 62 and 63 are erected as a sieving efficiency improving tool.

  As shown in FIG. 2, the inverted V-shaped plate 61 has a wall portion 61 a that rises in a direction to stand on the screen 5, and a base portion 61 b that extends along the surface of the screen 5 from the lower end of the wall portion 61 a.

  Similarly, as shown in FIG. 2, the flow guide plates 62 and 63 rise along the surface of the screen 5 from the wall portions 62 a and 63 a that rise in the direction of standing on the screen 5 and from the lower ends of the wall portions 62 a and 63 a, respectively. And extending base portions 62b and 63b.

  The inverted V-shaped plate 61 and the flow guide plates 62 and 63 can be attached to and detached from the screen 5. Although not shown in FIGS. 1 and 2, the base 61 b of the inverted V-shaped plate 61 and the bases 62 b and 63 b of the flow guide plates 62 and 63 are in contact with the screen 5 by, for example, bolts and nuts. It can be fixed in the state.

  As shown in FIG. 2, the base 61 b of the inverted V-shaped plate 61 in the top view and the bases 62 b and 63 b of the flow guide plates 62 and 63 are formed on the screen 5 so as to extend downstream along the surface of the screen 5. It can be attached. In order to prevent sieving objects flowing from upstream to downstream at the level difference between the base 61 b of the inverted V-shaped plate 61 and the bases 62 b and 63 b of the flow guide plates 62 and 63 and the screen 5. It is.

  The top-view inverted V-shaped plate 61 has a corner portion formed by two planes of the wall portions 61a and 61a. The inverted V-shaped plate 61 as viewed from above is arranged so that the end of this corner is directed in the direction opposite to the direction of flow of the sieving object. In other words, the inverted V-shaped plate 61 as viewed from above is arranged so that the bent portion of the V shape protrudes toward the upstream side.

  When the sieving object flowing from the upstream to the downstream on the screen 5 reaches the wall 61a of the inverted V-shaped plate 61 when viewed from above, the sieving object is guided toward the side end along the wall 61a. The direction in which the sieving object is guided is different from the direction flowing from upstream to downstream. Specifically, the velocity component in the direction flowing from upstream to downstream when the sieving object is guided is smaller than the velocity component in the direction flowing from upstream to downstream when the sieving object is not guided. It has become. Therefore, the inverted V-shaped plate 61 in the top view can obstruct the flow of the sieving object between the upstream side and the downstream side of the screen 5, and can increase the time during which the sieving object stays on the screen 5. The guided sieving object flows again downstream beyond the side edge of the wall portion 61a.

  When there is a lump composed of a plurality of solids in the sieving object flowing from upstream to downstream on the screen 5, the lump collides with the corner or wall 61a of the inverted V-shaped plate 61 when viewed from above. Can divide the mass into a plurality of solids.

  As shown in FIGS. 1 and 2, the flow guide plate 62 is configured such that both side ends of the wall portion 62 a spread in the width direction of the screen 5. The flow guide plate 62 is configured such that one side end of the wall portion 62a is positioned downstream of the other side end.

  When the sieving object flowing from the upstream to the downstream on the screen 5 reaches the wall 62a of the flow guide plate 62, the sieving object is guided toward one side end along the wall 62a. The direction in which the sieving object is guided is different from the direction flowing from upstream to downstream. Similar to the inverted V-shaped plate 61 in the top view, the flow guide plate 62 obstructs the flow of the sieving object between the upstream side and the downstream side of the screen 5, and allows time for the sieving object to stay on the screen 5. Can be long. The guided sieving object flows again downstream after passing over one side end of the wall 62a.

  When there is a lump composed of a plurality of solids in the sieving object flowing from upstream to downstream on the screen 5, the lump is the wall portion of the flow guide plate 62 in the same manner as the inverted V-shaped plate 61 in top view. By colliding with 62a, the lump can be divided into a plurality of solids.

  A corner portion of the inverted V-shaped plate 61 in a top view is disposed at a position downstream of one side end of the wall portion 62a. Therefore, the flow guide plate 62 guides the flow of the sieving object toward the corner portion of the inverted V-shaped plate 61 when viewed from above.

  As shown in FIGS. 1 and 2, the flow guide plate 63 also has both side ends of the wall portion 63 a extending in the width direction of the screen 5 in the same manner as the flow guide plate 62. The flow guide plate 63 is configured such that one side end of the wall portion 63a is positioned downstream of the other side end.

  As shown in FIG. 2, the other side end on the upstream side in the wall portion 63 a is opposite to the width direction of the screen 5 and extends in the vicinity of the outer edge of the screen 5 extending from the upstream side toward the downstream side wall 42 of the sieve body 4. 42 abuts.

  One side end on the downstream side of the wall 63 a is located near the center in the width direction of the screen 5.

  When the sieving object flowing in the vicinity of the outer edge of the screen 5 from the upstream to the downstream reaches the wall 63a of the flow guide plate 63, the sieving object is guided toward one side end along the wall 63a. The direction in which the sieving object is guided is different from the direction flowing from upstream to downstream. Similar to the inverted V-shaped plate 61 in the top view, the flow guide plate 63 obstructs the flow of the sieving object between the upstream side and the downstream side of the screen 5, and allows time for the sieving object to stay on the screen 5. Can be long. The guided sieving object flows again downstream after passing over one side end of the wall 63a.

  When there is a lump composed of a plurality of solids in the sieving object flowing from upstream to downstream on the screen 5, the lump is the wall portion of the flow guide plate 63 in the same manner as the inverted V-shaped plate 61 in top view. By colliding with 63a, the lump can be divided into a plurality of solids.

  Although the said embodiment demonstrated the case where the target object sieved by the sieve apparatus 1 is a wood chip, it is not limited to this. Objects to be sieved include crushed rock, sand, earth or coal, crushed cement material or slag, crushed concrete or asphalt, crushed ceramics, crushed glass, crushed Ice, crushed metal, crushed fiber, pulp, wood or rice husk, crushed paper, crushed food, crushed rubber or plastic, crushed firewood, crushed municipal waste, crushed medical It may be waste, powder or the like.

  In the said embodiment, although the case where the sieve main body 4 was a substantially rectangular box in top view was demonstrated, it is not limited to this. The sieve body may be a box having another shape such as a circle in top view.

  Although the said embodiment demonstrated the case where the surface of the screen 5 was in the state inclined toward the downstream side from the upstream, it is not limited to this. The screen surface may be horizontal.

  In the above-described embodiment, the case where the screen 5 performs a turning motion in a plane has been described. However, the present invention is not limited to this. For example, the sieving may be performed by different types of movements, such as the movement of the sieving body so as to continuously generate diagonal forward vibrations on the screen.

  In the above-described embodiment, the case where the screen 5 is provided with the inverted V-shaped plate 61 and the flow guide plates 62 and 63 as a sieving efficiency improvement tool has been described. However, the screen 5 is not limited thereto. Absent. For example, a column having a polygonal cross section may be erected on the screen 5 as a sieving efficiency improvement tool.

  In the above-described embodiment, the top view inverted V-shaped plate 61 and the flow guide plates 62 and 63, which are sieving efficiency improving tools, respectively, are the wall portions 61a, 62a, and 63a that rise in the direction of standing on the screen 5, and the wall portions. Although the case where it has the base parts 61b, 62b, and 63b extended along the surface of the screen 5 from the lower end of 61a, 62a, 63a was demonstrated, it is not limited to this. The top-view inverted V-shaped plate and the flow guide plate, which are sieving efficiency improving tools, may have other configurations as long as they can stand up from the screen.

  In the above embodiment, the case where the top-view reversed V-shaped plate 61 and the flow guide plates 62 and 63 can be attached to or detached from the screen 5 using bolts and nuts has been described. However, the present invention is not limited to this. For example, the sieving efficiency improvement tool may be freely attached to and detached from the screen by a magnet or the like.

  In the above-described embodiment, the case where the inverted V-shaped plate 61 in the top view has a corner portion formed by two flat surfaces of each plate material has been described, but the present invention is not limited to this. The inverted V-shaped plate in the top view may have, for example, a corner or a sharp edge formed by two curved surfaces.

  In the above embodiment, as shown in the figure, the case has been described in which the wall portions 62a and 63a of the flow guide plates 62 and 63 are flat plates, but the present invention is not limited to this. The wall portion of the flow guide plate may be a curved plate, for example.

DESCRIPTION OF SYMBOLS 1 Sieve apparatus 2 Base 3 Sieve support body 4 Sieve body 5 Screen 21 Drive part 41 Upstream wall 42 Side wall 43 Passing material discharge port 51 Hole 61 Reverse view V-shaped plate 61a Wall part 61b Base 62, 63 Flow guide plate 62a, 63a Wall 62b, 63b Base

The present invention relates to a sieving device, and more particularly to a flow obstruction tool for a screen of a sieving device, a screen for a sieving device, and a sieving device, which can increase the time during which a sieving object stays on the screen.

  A sieving apparatus is used to continuously separate a large amount of objects including solids of various sizes by size.

  As such a sieving device, there is one shown in Patent Document 1. The sieving apparatus described in Patent Document 1 performs a sieving process by putting a crushed product that is a sieving object into a sieving net that is a screen. The crushed product that has been input is separated into a solid that passes through the screen and a solid that remains on the screen in the process of flowing from upstream to downstream of the sieve screen.

Japanese Patent Laid-Open No. 10-52650

  In the sieving apparatus as shown in Patent Document 1, the sieving object is placed on the sieving mesh due to various factors such as sieving motion conditions, the shape and size of the sieving object, and the shape and arrangement of the screen holes. In the process of flowing from upstream to downstream, there is a problem that the sieving object cannot be sufficiently separated for each size and the sieving efficiency is not improved.

Therefore, from the above points, the present invention provides a flow blocking device for a screen of a sieving apparatus with improved sieving efficiency, a screen of the sieving apparatus with improved sieving efficiency, and a sieving apparatus with improved sieving efficiency. For the purpose.

In order to solve the above-mentioned problem, the screen flow obstruction tool of the sieving apparatus according to claim 1 is configured such that the position where the sieving object is put and placed directly on the surface of the screen is upstream, and the sieving is performed. The position where the generated residue is discharged is downstream, and the sieving object flows from the upstream to the downstream by the vibration of the screen while maintaining the state where the sieving object is placed on the surface of the screen. In the screen of the sieving device in which the sieving object is sieved, a rigid body standing from the surface of the screen, and by vibrating integrally with the screen, the surface of the screen, together with the sieving object inhibited to flow from upstream to downstream, the sieving object extends the time to stay on the surface of the screen Mass of the sieving object flowing on the surface of the screen is adapted to be divided by the collision.

According to the flow obstruction tool for the screen of the sieving apparatus according to the first aspect, the sieving object stays on the screen for a long time, so that the sieving efficiency can be improved. Therefore, it is not necessary to separately provide a line for returning the sieving object that has not been sufficiently separated from the downstream to the upstream of the screen, or it is possible to reduce the number of times of returning by the return line. Therefore, energy required for sieving can be suppressed.

Moreover, according to the flow obstruction tool for the screen of the sieving device of claim 1, since the lump of the sieving object flowing on the surface of the screen collides with the flow obstruction tool and is divided, the sieving efficiency is further improved. be able to.

According to a second aspect of the present invention, there is provided a screen flow inhibiting device for a screen of a sieving apparatus according to the first aspect , wherein the flow inhibiting device for the screen of the first aspect of the sieving device performs a swiveling motion integrally with the screen.

According to a third aspect of the present invention, there is provided a flow obstruction tool for a screen of the sieving apparatus according to the first or second aspect , wherein the flow obstruction tool for the screen of the first or second aspect is freely attachable to and detachable from the screen.

According to the flow obstruction tool for the screen of the sieving device of claim 3, it acts in the same manner as the flow obstruction device for the screen of the sieving device of claim 1 or 2, and is attached to the screen of the existing sieving device. it can. Moreover, it becomes possible to attach to the arbitrary positions of a screen so that the time which a sieving target object stays on a screen can be made longer. Therefore, sieving efficiency can be further improved according to the sieving object or sieving motion.

The flow obstruction tool for the screen of the sieving device according to claim 4 is the flow obstruction device for the screen of the sieving device according to any one of claims 1 to 3, wherein the two flat surfaces form corners or two curved surfaces. It has sharp edges , and the corners and the tips of the sharp edges are arranged to face in the direction opposite to the flow direction of the sieving object on the surface of the screen . including.

The sieving object may be a mass of a plurality of solids. If the mass is larger than the pores of the screen, the mass cannot pass through the screen. Therefore, a plurality of solids constituting the lump are discharged from the downstream without being sieved. According to the flow obstruction tool for the screen of the sieving device of claim 4, it acts in the same way as the flow obstruction device for the screen of the sieving device of any one of claims 1 to 3, and the lump is directed from upstream to downstream. In the course of flowing, the mass breaks up into a plurality of solids when it collides with the corners or sharp edges of the screen block for the screen device . Since the separated solid can be sieved with a screen, further improvement in sieving efficiency can be realized.

The flow obstruction tool for the screen of the sieving device according to claim 5 is the flow obstruction tool for the screen of the sieving device according to claim 4 , wherein the flow of the sieving object is directed toward the corner or the sharp edge. Including those provided to guide.

According to the flow inhibiting device for the screen of the sieving device of claim 5, the flow inhibiting device for the screen of the sieving device of claim 4 works in addition to the flow inhibiting device for the screen of the sieving device of claim 4. towards the corners or sharp edges of the tool, the flow inhibiting device for screen sieve apparatus according to claim 5 is to guide the flow of sieving object. Accordingly, it is possible to improve the probability that a lump that is included in the sieving object and that is larger than the hole of the screen collides with a corner or a sharp edge of the flow blocker for the screen of the sieving apparatus according to claim 4 . By this collision, the lump is divided into a plurality of solids. Since the separated solid can be sieved with a screen, further improvement in sieving efficiency can be realized.

Flow impedance device for screen sieve apparatus according to claim 6, in any of the flow impedance device of claims 1 to 5, from the vicinity of the outer periphery of the screen extending from upstream to downstream opposite the width direction of the screen including those provided to guide the flow of the sieving object toward a widthwise center of the screen.

  In the sieving device, in order to support the screen, a hole may not be formed in the vicinity of the outer edge of the screen. Therefore, in the vicinity of the outer edge of the screen that faces the width direction of the screen and extends from upstream to downstream, it becomes a region where the sieving object cannot be sieved. If the sieving object flows in this region from the upstream to the downstream, the sieving efficiency may be reduced.

According to the flow obstruction tool for the screen of the sieving device according to claim 6, it acts in the same manner as the flow obstruction device for the screen of the sieving device according to any one of claims 1 to 5, and in addition, the sieving flowing near the outer edge of the screen By guiding the part to be divided toward the center in the width direction of the screen, the sieving efficiency can be improved.

The screen for the sieving apparatus according to claim 7 has a position where the sieving object is placed and placed directly on the surface thereof as an upstream, and a position where the screened residue is discharged as a downstream. For the sieving device, the sieving object is sieved by flowing from the upstream toward the downstream while maintaining the state where the sieving object is directly mounted on the surface. A screen , comprising a flow obstruction tool for the screen of the sieving device according to claim 1 .

The sieve device according to claim 8, being turned the sieving object, the position where the direct mounted state on the surface and upstream, and the position where the residue was sieved is discharged downstream, said sieve Having a screen of a sieving device in which the sieving object is sieved by flowing from the upstream toward the downstream while maintaining the state where the sieving object is directly placed on the surface A sieving device comprising a screen for the sieving device of claim 7 .

The screen for the sieving device according to the seventh aspect and the sieving device according to the eighth aspect have the same effects as any one of the first to sixth aspects.

The flow obstruction tool for the screen of the sieving device according to claims 1 to 6, the screen for the sieving device of claim 7, and the sieving device of claim 8 can achieve excellent sieving efficiency.

It is a schematic perspective view from the side surface direction of the sieve apparatus which has the flow obstruction tool for the screens of the sieve apparatus of this invention. It is a schematic perspective view from the front direction of the sieve apparatus of FIG.

  A sieve device 1 according to an embodiment of the present invention will be described with reference to the drawings.

  As shown in FIG. 1, the sieving device 1 includes a gantry 2, a sieving support 3 that is swingably attached to the gantry 2, and a sieving body 4 that is supported by the sieving support 3.

  The object screened by the sieving device 1 of the present embodiment is a wood chip.

  The gantry 2 accommodates a drive unit 21 that moves the sieve support 3. The drive unit 21 moves the sieve support 3 so that the sieve support 3 and the sieve body 4 move together.

  The sieve body 4 is a substantially rectangular box in top view. In the perspective view from the side surface direction of FIG. 1, the sieve body 4 is upstream on the right side and downstream on the left side. Further, in the perspective view from the front direction of FIG. 2, the sieve body 4 has an upstream side on the upstream side and a downstream side on the near side. In the perspective view from the front direction of FIG. 2, the sieve body 4 has a lateral direction in the width direction.

  As shown in FIGS. 1 and 2, the sieve body 4 has an upstream wall 41 and side walls 42 and 42. There is no wall on the downstream side of the box body 4 and it is open. A screen 5 is laid in the space surrounded by the upstream wall 41 and the side walls 42, 42. The side walls 42, 42 are in the vicinity of the outer edge of the screen 5 that faces the width direction of the screen 5 and extends from upstream to downstream. In the present embodiment, the surface of the screen 5 is inclined from the upstream side toward the downstream side.

  A sieving object is placed on the upstream side of the screen 5. As the sieving body 4 moves, the sieving object that has been introduced flows on the screen 5 in the downstream direction. In the present embodiment, the screen 5 performs a turning motion in a plane.

  As shown in FIG. 1, the screen 5 is provided with a number of holes 51 having a predetermined size. Among the sieving objects flowing on the screen 5, those smaller than the holes 51 pass through the screen 5 and are sieved. The sieving object is sieved, and the residue remaining on the screen 5 is discharged from the open part on the downstream side of the box body 4. The passing material that has passed through the screen 5 through the hole 51 is discharged from the passing material discharge port 43 below the screen 5 and slightly upstream from the position where the residue is discharged.

The screen 5 is provided with an inverted V-shaped plate 61 and flow guide plates 62 and 63 as a flow obstruction for the screen of the sieving device .

  As shown in FIG. 2, the inverted V-shaped plate 61 has a wall portion 61 a that rises in a direction to stand on the screen 5, and a base portion 61 b that extends along the surface of the screen 5 from the lower end of the wall portion 61 a.

  Similarly, as shown in FIG. 2, the flow guide plates 62 and 63 rise along the surface of the screen 5 from the wall portions 62 a and 63 a that rise in the direction of standing on the screen 5 and from the lower ends of the wall portions 62 a and 63 a, respectively. And extending base portions 62b and 63b.

  The inverted V-shaped plate 61 and the flow guide plates 62 and 63 can be attached to and detached from the screen 5. Although not shown in FIGS. 1 and 2, the base 61 b of the inverted V-shaped plate 61 and the bases 62 b and 63 b of the flow guide plates 62 and 63 are in contact with the screen 5 by, for example, bolts and nuts. It can be fixed in the state.

  As shown in FIG. 2, the base 61 b of the inverted V-shaped plate 61 in the top view and the bases 62 b and 63 b of the flow guide plates 62 and 63 are formed on the screen 5 so as to extend downstream along the surface of the screen 5. It can be attached. In order to prevent sieving objects flowing from upstream to downstream at the level difference between the base 61 b of the inverted V-shaped plate 61 and the bases 62 b and 63 b of the flow guide plates 62 and 63 and the screen 5. It is.

  The top-view inverted V-shaped plate 61 has a corner portion formed by two planes of the wall portions 61a and 61a. The inverted V-shaped plate 61 as viewed from above is arranged so that the end of this corner is directed in the direction opposite to the direction of flow of the sieving object. In other words, the inverted V-shaped plate 61 as viewed from above is arranged so that the bent portion of the V shape protrudes toward the upstream side.

  When the sieving object flowing from the upstream to the downstream on the screen 5 reaches the wall 61a of the inverted V-shaped plate 61 when viewed from above, the sieving object is guided toward the side end along the wall 61a. The direction in which the sieving object is guided is different from the direction flowing from upstream to downstream. Specifically, the velocity component in the direction flowing from upstream to downstream when the sieving object is guided is smaller than the velocity component in the direction flowing from upstream to downstream when the sieving object is not guided. It has become. Therefore, the inverted V-shaped plate 61 in the top view can obstruct the flow of the sieving object between the upstream side and the downstream side of the screen 5, and can increase the time during which the sieving object stays on the screen 5. The guided sieving object flows again downstream beyond the side edge of the wall portion 61a.

  When there is a lump composed of a plurality of solids in the sieving object flowing from upstream to downstream on the screen 5, the lump collides with the corner or wall 61a of the inverted V-shaped plate 61 when viewed from above. Can divide the mass into a plurality of solids.

  As shown in FIGS. 1 and 2, the flow guide plate 62 is configured such that both side ends of the wall portion 62 a spread in the width direction of the screen 5. The flow guide plate 62 is configured such that one side end of the wall portion 62a is positioned downstream of the other side end.

  When the sieving object flowing from the upstream to the downstream on the screen 5 reaches the wall 62a of the flow guide plate 62, the sieving object is guided toward one side end along the wall 62a. The direction in which the sieving object is guided is different from the direction flowing from upstream to downstream. Similar to the inverted V-shaped plate 61 in the top view, the flow guide plate 62 obstructs the flow of the sieving object between the upstream side and the downstream side of the screen 5, and allows time for the sieving object to stay on the screen 5. Can be long. The guided sieving object flows again downstream after passing over one side end of the wall 62a.

  When there is a lump composed of a plurality of solids in the sieving object flowing from upstream to downstream on the screen 5, the lump is the wall portion of the flow guide plate 62 in the same manner as the inverted V-shaped plate 61 in top view. By colliding with 62a, the lump can be divided into a plurality of solids.

  A corner portion of the inverted V-shaped plate 61 in a top view is disposed at a position downstream of one side end of the wall portion 62a. Therefore, the flow guide plate 62 guides the flow of the sieving object toward the corner portion of the inverted V-shaped plate 61 when viewed from above.

  As shown in FIGS. 1 and 2, the flow guide plate 63 also has both side ends of the wall portion 63 a extending in the width direction of the screen 5 in the same manner as the flow guide plate 62. The flow guide plate 63 is configured such that one side end of the wall portion 63a is positioned downstream of the other side end.

  As shown in FIG. 2, the other side end on the upstream side in the wall portion 63 a is opposite to the width direction of the screen 5 and extends in the vicinity of the outer edge of the screen 5 extending from the upstream side toward the downstream side wall 42 of the sieve body 4. 42 abuts.

  One side end on the downstream side of the wall 63 a is located near the center in the width direction of the screen 5.

  When the sieving object flowing in the vicinity of the outer edge of the screen 5 from the upstream to the downstream reaches the wall 63a of the flow guide plate 63, the sieving object is guided toward one side end along the wall 63a. The direction in which the sieving object is guided is different from the direction flowing from upstream to downstream. Similar to the inverted V-shaped plate 61 in the top view, the flow guide plate 63 obstructs the flow of the sieving object between the upstream side and the downstream side of the screen 5, and allows time for the sieving object to stay on the screen 5. Can be long. The guided sieving object flows again downstream after passing over one side end of the wall 63a.

  When there is a lump composed of a plurality of solids in the sieving object flowing from upstream to downstream on the screen 5, the lump is the wall portion of the flow guide plate 63 in the same manner as the inverted V-shaped plate 61 in top view. By colliding with 63a, the lump can be divided into a plurality of solids.

  Although the said embodiment demonstrated the case where the target object sieved by the sieve apparatus 1 is a wood chip, it is not limited to this. Objects to be sieved include crushed rock, sand, earth or coal, crushed cement material or slag, crushed concrete or asphalt, crushed ceramics, crushed glass, crushed Ice, crushed metal, crushed fiber, pulp, wood or rice husk, crushed paper, crushed food, crushed rubber or plastic, crushed firewood, crushed municipal waste, crushed medical It may be waste, powder or the like.

  In the said embodiment, although the case where the sieve main body 4 was a substantially rectangular box in top view was demonstrated, it is not limited to this. The sieve body may be a box having another shape such as a circle in top view.

  Although the said embodiment demonstrated the case where the surface of the screen 5 was in the state inclined toward the downstream side from the upstream, it is not limited to this. The screen surface may be horizontal.

  In the above-described embodiment, the case where the screen 5 performs a turning motion in a plane has been described. However, the present invention is not limited to this. For example, the sieving may be performed by different types of movements, such as the movement of the sieving body so as to continuously generate diagonal forward vibrations on the screen.

In the above embodiment, the case where the screen 5 is provided with the inverted V-shaped plate 61 and the flow guide plates 62 and 63 as a flow blocking device for the screen of the sieving device has been described, but the present invention is not limited thereto. It will never be done. For example, a column having a polygonal cross section may stand upright on the screen 5 as a flow blocking tool for the screen of the sieving device .

In the above embodiment, the top-view reversed V-shaped plate 61 and the flow guide plates 62 and 63, which are flow obstructions for the screen of the sieving device , are respectively wall portions 61a, 62a, and 63a that rise in the direction of standing on the screen 5. The base portions 61b, 62b, and 63b extending along the surface of the screen 5 from the lower ends of the wall portions 61a, 62a, and 63a have been described. However, the present invention is not limited to this. The top-view reverse V-shaped plate and the flow guide plate, which are flow obstructions for the screen of the sieving device, may have other configurations as long as they can stand up from the screen.

In the above embodiment, the case where the top-view reversed V-shaped plate 61 and the flow guide plates 62 and 63 can be attached to or detached from the screen 5 using bolts and nuts has been described. However, the present invention is not limited to this. For example, the flow obstruction tool for the screen of the sieving device may be attached to and detached from the screen by a magnet or the like.

In the above-described embodiment, the case where the inverted V-shaped plate 61 in the top view has a corner portion formed by two flat surfaces of each plate material has been described, but the present invention is not limited to this. The inverted V-shaped plate in top view may have, for example, a sharp edge formed by two curved surfaces .

  In the above embodiment, as shown in the figure, the case has been described in which the wall portions 62a and 63a of the flow guide plates 62 and 63 are flat plates, but the present invention is not limited to this. The wall portion of the flow guide plate may be a curved plate, for example.

DESCRIPTION OF SYMBOLS 1 Sieve apparatus 2 Base 3 Sieve support body 4 Sieve body 5 Screen 21 Drive part 41 Upstream wall 42 Side wall 43 Passing material discharge port 51 Hole 61 Reverse view V-shaped plate 61a Wall part 61b Base 62, 63 Flow guide plate 62a, 63a Wall 62b, 63b Base

  The present invention relates to a sieving device, and more particularly to a flow obstruction tool for a screen of a sieving device, a screen for a sieving device, and a sieving device, which can increase the time during which a sieving object stays on the screen.

  A sieving apparatus is used to continuously separate a large amount of objects including solids of various sizes by size.

  As such a sieving device, there is one shown in Patent Document 1. The sieving apparatus described in Patent Document 1 performs a sieving process by putting a crushed product that is a sieving object into a sieving net that is a screen. The crushed product that has been input is separated into a solid that passes through the screen and a solid that remains on the screen in the process of flowing from upstream to downstream of the sieve screen.

Japanese Patent Laid-Open No. 10-52650

  In the sieving apparatus as shown in Patent Document 1, the sieving object is placed on the sieving mesh due to various factors such as sieving motion conditions, the shape and size of the sieving object, and the shape and arrangement of the screen holes. In the process of flowing from upstream to downstream, there is a problem that the sieving object cannot be sufficiently separated for each size and the sieving efficiency is not improved.

  Therefore, from the above points, the present invention provides a flow blocking device for a screen of a sieving apparatus with improved sieving efficiency, a screen of the sieving apparatus with improved sieving efficiency, and a sieving apparatus with improved sieving efficiency. For the purpose.

In order to solve the above-mentioned problem, the flow blocking tool for a screen of the sieving apparatus according to claim 1 is provided with holes of a predetermined size for sieving the sieving object , and the sieving object The position at which the screen is placed directly on the screen surface is the upstream, the position where the screened residue is discharged is the downstream, and the screen moves from the upstream to the downstream by the movement of the screen. In the screen of the sieving apparatus, the sieving object smaller than the hole is sieved through the hole, and the sieving object remaining on the surface of the screen is discharged as the residue . A rigid body erected from the surface of the screen, having corners formed by two planes or sharp edges formed by two curved surfaces, and tips of these corners and sharp edges On the surface of the screen The kicking direction of flow of said sieving object including those that are arranged to face in opposite directions.

  According to the flow obstruction tool for the screen of the sieving apparatus according to the first aspect, the sieving object stays on the screen for a long time, so that the sieving efficiency can be improved. Therefore, it is not necessary to separately provide a line for returning the sieving object that has not been sufficiently separated from the downstream to the upstream of the screen, or it is possible to reduce the number of times of returning by the return line. Therefore, energy required for sieving can be suppressed.

  Moreover, according to the flow obstruction tool for the screen of the sieving device of claim 1, since the lump of the sieving object flowing on the surface of the screen collides with the flow obstruction tool and is divided, the sieving efficiency is further improved. be able to.

Furthermore, according to the flow obstruction tool for the screen of the sieving device according to claim 1, when the lump collides with a corner or a sharp edge of the flow obstruction device for the screen of the sieving device in the process of flowing from upstream to downstream. , The mass is divided into multiple solids. Since the separated solid can be sieved with a screen, further improvement in sieving efficiency can be realized.

The flow restrictor for the screen of the sieving device according to claim 2 is the flow restrictor for the screen of the sieving device according to claim 1 , and is attachable to and detachable from the screen.

According to the flow obstruction tool for the screen of the sieving apparatus of the second aspect , the flow obstruction tool for the screen of the sieving apparatus of the first aspect operates in the same manner and can be attached to the screen of the existing sieving apparatus. Moreover, it becomes possible to attach to the arbitrary positions of a screen so that the time which a sieving target object stays on a screen can be made longer. Therefore, sieving efficiency can be further improved according to the sieving object or sieving motion.

The flow obstruction tool for the screen of the sieving apparatus according to claim 3 is the flow obstruction tool for the screen of the sieving apparatus according to claim 1 or 2 , wherein the sieving object is directed toward the corner or the sharp edge. Including those provided to guide the flow.

According to the flow inhibiting device for screen sieve apparatus according to claim 3, in order to act in the same manner as the flow inhibiting device for screen sieve apparatus according to claim 1 or 2, the sieve device according to claim 1 or 2 screens The flow blocker for the screen of the sieving apparatus according to claim 3 guides the flow of the sieving object toward the corner or the sharp edge of the flow blocker. Thereby, it is possible to improve the probability that a lump that is included in the sieving object and that is larger than the hole of the screen collides with a corner or a sharp edge of the flow obstruction tool for the screen of the sieving apparatus according to claim 1 or 2. it can. By this collision, the lump is divided into a plurality of solids. Since the separated solid can be sieved with a screen, further improvement in sieving efficiency can be realized.

The flow obstruction tool for the screen of the sieving device according to claim 4 is the flow obstruction tool according to any one of claims 1 to 3 , wherein the flow obstruction tool faces the width direction of the screen and extends from the vicinity of the outer edge of the screen extending from upstream to downstream. It is provided so as to guide the flow of the sieving object toward the center in the width direction of the screen.

  In the sieving device, in order to support the screen, a hole may not be formed in the vicinity of the outer edge of the screen. Therefore, in the vicinity of the outer edge of the screen that faces the width direction of the screen and extends from upstream to downstream, it becomes a region where the sieving object cannot be sieved. If the sieving object flows in this region from the upstream to the downstream, the sieving efficiency may be reduced.

According to the flow obstruction tool for the screen of the sieving device of claim 4 , the same function as the flow obstruction device for the screen of the sieving device of any one of claims 1 to 3 , and the sieve flowing in the vicinity of the outer edge of the screen By guiding the part to be divided toward the center in the width direction of the screen, the sieving efficiency can be improved.

The screen for the sieving apparatus according to claim 5 is provided with a hole of a predetermined size for sieving the sieving object, and the sieving object is put and placed directly on the surface of the screen. The position to be placed is the upstream, the position where the sieving residue is discharged is the downstream, and the screen moves from the upstream to the downstream by the movement of the screen, and is smaller than the hole. things, sieved through said hole, said sieving objects remaining on the surface of the screen is a screen for screen device which is discharged as the residue, any of claims 1 to 4 A flow obstruction for the screen of the sieving device.

The sieving apparatus according to claim 6 is provided with holes of a predetermined size for sieving the sieving object, and the sieving object is placed and placed directly on the surface of the screen . The position to be in the state is the upstream, the position where the sieved residue is discharged is the downstream, the flow of the screen from the upstream to the downstream by the movement of the screen, the sieving object smaller than the hole, the hole passes through and sieved, the sieve fraction object remaining on the surface of the screen is a screen device having a screen for screen device which is discharged as the residue, according to claim 5 A screen for a sieve device is provided.

The screen for the sieving device of claim 5 and the sieving device of claim 6 have the same function and effect as any one of claims 1 to 4 .

The flow obstruction tool for the screen of the sieving device according to claims 1 to 4 , the screen for the sieving device of claim 5 , and the sieving device of claim 6 can achieve excellent sieving efficiency.

It is a schematic perspective view from the side surface direction of the sieve apparatus which has the flow obstruction tool for the screens of the sieve apparatus of this invention. It is a schematic perspective view from the front direction of the sieve apparatus of FIG.

  A sieve device 1 according to an embodiment of the present invention will be described with reference to the drawings.

  As shown in FIG. 1, the sieving device 1 includes a gantry 2, a sieving support 3 that is swingably attached to the gantry 2, and a sieving body 4 that is supported by the sieving support 3.

  The object screened by the sieving device 1 of the present embodiment is a wood chip.

  The gantry 2 accommodates a drive unit 21 that moves the sieve support 3. The drive unit 21 moves the sieve support 3 so that the sieve support 3 and the sieve body 4 move together.

  The sieve body 4 is a substantially rectangular box in top view. In the perspective view from the side surface direction of FIG. 1, the sieve body 4 is upstream on the right side and downstream on the left side. Further, in the perspective view from the front direction of FIG. 2, the sieve body 4 has an upstream side on the upstream side and a downstream side on the near side. In the perspective view from the front direction of FIG. 2, the sieve body 4 has a lateral direction in the width direction.

  As shown in FIGS. 1 and 2, the sieve body 4 has an upstream wall 41 and side walls 42 and 42. There is no wall on the downstream side of the box body 4 and it is open. A screen 5 is laid in the space surrounded by the upstream wall 41 and the side walls 42, 42. The side walls 42, 42 are in the vicinity of the outer edge of the screen 5 that faces the width direction of the screen 5 and extends from upstream to downstream. In the present embodiment, the surface of the screen 5 is inclined from the upstream side toward the downstream side.

  A sieving object is placed on the upstream side of the screen 5. As the sieving body 4 moves, the sieving object that has been introduced flows on the screen 5 in the downstream direction. In the present embodiment, the screen 5 performs a turning motion in a plane.

  As shown in FIG. 1, the screen 5 is provided with a number of holes 51 having a predetermined size. Among the sieving objects flowing on the screen 5, those smaller than the holes 51 pass through the screen 5 and are sieved. The sieving object is sieved, and the residue remaining on the screen 5 is discharged from the open part on the downstream side of the box body 4. The passing material that has passed through the screen 5 through the hole 51 is discharged from the passing material discharge port 43 below the screen 5 and slightly upstream from the position where the residue is discharged.

  The screen 5 is provided with an inverted V-shaped plate 61 and flow guide plates 62 and 63 as a flow obstruction for the screen of the sieving device.

  As shown in FIG. 2, the inverted V-shaped plate 61 has a wall portion 61 a that rises in a direction to stand on the screen 5, and a base portion 61 b that extends along the surface of the screen 5 from the lower end of the wall portion 61 a.

  Similarly, as shown in FIG. 2, the flow guide plates 62 and 63 rise along the surface of the screen 5 from the wall portions 62 a and 63 a that rise in the direction of standing on the screen 5 and from the lower ends of the wall portions 62 a and 63 a, respectively. And extending base portions 62b and 63b.

  The inverted V-shaped plate 61 and the flow guide plates 62 and 63 can be attached to and detached from the screen 5. Although not shown in FIGS. 1 and 2, the base 61 b of the inverted V-shaped plate 61 and the bases 62 b and 63 b of the flow guide plates 62 and 63 are in contact with the screen 5 by, for example, bolts and nuts. It can be fixed in the state.

  As shown in FIG. 2, the base 61 b of the inverted V-shaped plate 61 in the top view and the bases 62 b and 63 b of the flow guide plates 62 and 63 are formed on the screen 5 so as to extend downstream along the surface of the screen 5. It can be attached. In order to prevent sieving objects flowing from upstream to downstream at the level difference between the base 61 b of the inverted V-shaped plate 61 and the bases 62 b and 63 b of the flow guide plates 62 and 63 and the screen 5. It is.

  The top-view inverted V-shaped plate 61 has a corner portion formed by two planes of the wall portions 61a and 61a. The inverted V-shaped plate 61 as viewed from above is arranged so that the end of this corner is directed in the direction opposite to the direction of flow of the sieving object. In other words, the inverted V-shaped plate 61 as viewed from above is arranged so that the bent portion of the V shape protrudes toward the upstream side.

  When the sieving object flowing from the upstream to the downstream on the screen 5 reaches the wall 61a of the inverted V-shaped plate 61 when viewed from above, the sieving object is guided toward the side end along the wall 61a. The direction in which the sieving object is guided is different from the direction flowing from upstream to downstream. Specifically, the velocity component in the direction flowing from upstream to downstream when the sieving object is guided is smaller than the velocity component in the direction flowing from upstream to downstream when the sieving object is not guided. It has become. Therefore, the inverted V-shaped plate 61 in the top view can obstruct the flow of the sieving object between the upstream side and the downstream side of the screen 5, and can increase the time during which the sieving object stays on the screen 5. The guided sieving object flows again downstream beyond the side edge of the wall portion 61a.

  When there is a lump composed of a plurality of solids in the sieving object flowing from upstream to downstream on the screen 5, the lump collides with the corner or wall 61a of the inverted V-shaped plate 61 when viewed from above. Can divide the mass into a plurality of solids.

  As shown in FIGS. 1 and 2, the flow guide plate 62 is configured such that both side ends of the wall portion 62 a spread in the width direction of the screen 5. The flow guide plate 62 is configured such that one side end of the wall portion 62a is positioned downstream of the other side end.

  When the sieving object flowing from the upstream to the downstream on the screen 5 reaches the wall 62a of the flow guide plate 62, the sieving object is guided toward one side end along the wall 62a. The direction in which the sieving object is guided is different from the direction flowing from upstream to downstream. Similar to the inverted V-shaped plate 61 in the top view, the flow guide plate 62 obstructs the flow of the sieving object between the upstream side and the downstream side of the screen 5, and allows time for the sieving object to stay on the screen 5. Can be long. The guided sieving object flows again downstream after passing over one side end of the wall 62a.

  When there is a lump composed of a plurality of solids in the sieving object flowing from upstream to downstream on the screen 5, the lump is the wall portion of the flow guide plate 62 in the same manner as the inverted V-shaped plate 61 in top view. By colliding with 62a, the lump can be divided into a plurality of solids.

  A corner portion of the inverted V-shaped plate 61 in a top view is disposed at a position downstream of one side end of the wall portion 62a. Therefore, the flow guide plate 62 guides the flow of the sieving object toward the corner portion of the inverted V-shaped plate 61 when viewed from above.

  As shown in FIGS. 1 and 2, the flow guide plate 63 also has both side ends of the wall portion 63 a extending in the width direction of the screen 5 in the same manner as the flow guide plate 62. The flow guide plate 63 is configured such that one side end of the wall portion 63a is positioned downstream of the other side end.

  As shown in FIG. 2, the other side end on the upstream side in the wall portion 63 a is opposite to the width direction of the screen 5 and extends in the vicinity of the outer edge of the screen 5 extending from the upstream side toward the downstream side wall 42 of the sieve body 4. 42 abuts.

  One side end on the downstream side of the wall 63 a is located near the center in the width direction of the screen 5.

  When the sieving object flowing in the vicinity of the outer edge of the screen 5 from the upstream to the downstream reaches the wall 63a of the flow guide plate 63, the sieving object is guided toward one side end along the wall 63a. The direction in which the sieving object is guided is different from the direction flowing from upstream to downstream. Similar to the inverted V-shaped plate 61 in the top view, the flow guide plate 63 obstructs the flow of the sieving object between the upstream side and the downstream side of the screen 5, and allows time for the sieving object to stay on the screen 5. Can be long. The guided sieving object flows again downstream after passing over one side end of the wall 63a.

  When there is a lump composed of a plurality of solids in the sieving object flowing from upstream to downstream on the screen 5, the lump is the wall portion of the flow guide plate 63 in the same manner as the inverted V-shaped plate 61 in top view. By colliding with 63a, the lump can be divided into a plurality of solids.

  Although the said embodiment demonstrated the case where the target object sieved by the sieve apparatus 1 is a wood chip, it is not limited to this. Objects to be sieved include crushed rock, sand, earth or coal, crushed cement material or slag, crushed concrete or asphalt, crushed ceramics, crushed glass, crushed Ice, crushed metal, crushed fiber, pulp, wood or rice husk, crushed paper, crushed food, crushed rubber or plastic, crushed firewood, crushed municipal waste, crushed medical It may be waste, powder or the like.

  In the said embodiment, although the case where the sieve main body 4 was a substantially rectangular box in top view was demonstrated, it is not limited to this. The sieve body may be a box having another shape such as a circle in top view.

  Although the said embodiment demonstrated the case where the surface of the screen 5 was in the state inclined toward the downstream side from the upstream, it is not limited to this. The screen surface may be horizontal.

  In the above-described embodiment, the case where the screen 5 performs a turning motion in a plane has been described. However, the present invention is not limited to this. For example, the sieving may be performed by different types of movements, such as the movement of the sieving body so as to continuously generate diagonal forward vibrations on the screen.

  In the above embodiment, the case where the screen 5 is provided with the inverted V-shaped plate 61 and the flow guide plates 62 and 63 as a flow blocking device for the screen of the sieving device has been described, but the present invention is not limited thereto. It will never be done. For example, a column having a polygonal cross section may stand upright on the screen 5 as a flow blocking tool for the screen of the sieving device.

  In the above embodiment, the top-view reversed V-shaped plate 61 and the flow guide plates 62 and 63, which are flow obstructions for the screen of the sieving device, are respectively wall portions 61a, 62a, and 63a that rise in the direction of standing on the screen 5. The base portions 61b, 62b, and 63b extending along the surface of the screen 5 from the lower ends of the wall portions 61a, 62a, and 63a have been described. However, the present invention is not limited to this. The top-view reverse V-shaped plate and the flow guide plate, which are flow obstructions for the screen of the sieving device, may have other configurations as long as they can stand up from the screen.

  In the above embodiment, the case where the top-view reversed V-shaped plate 61 and the flow guide plates 62 and 63 can be attached to or detached from the screen 5 using bolts and nuts has been described. However, the present invention is not limited to this. For example, the flow obstruction tool for the screen of the sieving device may be attached to and detached from the screen by a magnet or the like.

  In the above-described embodiment, the case where the inverted V-shaped plate 61 in the top view has a corner portion formed by two flat surfaces of each plate material has been described, but the present invention is not limited to this. The inverted V-shaped plate in top view may have, for example, a sharp edge formed by two curved surfaces.

  In the above embodiment, as shown in the figure, the case has been described in which the wall portions 62a and 63a of the flow guide plates 62 and 63 are flat plates, but the present invention is not limited to this. The wall portion of the flow guide plate may be a curved plate, for example.

DESCRIPTION OF SYMBOLS 1 Sieve apparatus 2 Base 3 Sieve support body 4 Sieve body 5 Screen 21 Drive part 41 Upstream wall 42 Side wall 43 Passing material discharge port 51 Hole 61 Reverse view V-shaped plate 61a Wall part 61b Base 62, 63 Flow guide plate 62a, 63a Wall 62b, 63b Base

Claims (7)

The sieving object is put in the upstream side, and the screen of the sieving device where the residue screened on the downstream side is discharged is erected,
A sieving efficiency improvement tool for a screen of a sieving apparatus, wherein the flow of the sieving object is inhibited between the upstream side and the downstream side of the screen, and the time for the sieving object to stay on the screen is lengthened.   The sieving efficiency improving tool for a screen of a sieving apparatus according to claim 1, wherein the sieving efficiency improving tool is freely attached to and detached from the screen.   The sieving efficiency improvement tool has corners or sharp edges formed by two planes or two curved surfaces, and the tips of these corners and sharp edges are the direction of flow of the sieving object. The screen sieving efficiency improvement tool for the screen of the sieving device according to claim 1, wherein the sieving device is disposed so as to face in a direction opposite to the direction of the screen.   The sieving efficiency improving tool includes a sieving efficiency improver that is provided to guide the flow of the sieving object toward the corner and the sharp edge. Efficiency improver.   The sieving efficiency improving tool is provided so as to guide the flow of the sieving object from the vicinity of the outer edge of the screen facing the width direction of the screen and extending from upstream to downstream toward the center of the screen in the width direction. The sieving efficiency improvement tool for the screen of the sieving device according to any one of claims 1 to 4, wherein A screen of a sieving device in which a sieving object is charged upstream and a residue screened on the downstream side is discharged,
6. A screen for a sieving apparatus, comprising the sieving efficiency improving tool according to claim 1. A sieving device having a screen into which a sieving object is charged upstream and a residue screened on the downstream side is discharged,
A sieve device comprising the screen of claim 6.

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