JP2001232231A - Sand sorting apparatus and tronmel used for the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make a tronmel possible to reliably and quickly move sand, reliably and efficiently carry out classification of sand with particle size within a standard and sand with particle size out of the standard, to make a sand transporting apparatus possible to transport a large quantity of uniform sand, and to reliably attain sufficient water draining capability by efficiently transmitting the vibration to transporting members. SOLUTION: The sand sorting apparatus is provided with a water tank 2, a tronmel 9 for separating sand with a particle size within a standard and sand with a particle size out of the standard, a sand carrying out apparatus 17 comprising a wrapping connector driving member 15 wound around a plurality of transmission wheels 10-14 and a plurality of carrying out members 16, linear guide rails 18 installed in the sand carrying out direction, guide members 19 fixed in the down face of the carrying out members 16 and engaged with the guide rails 18 in a manner the members can slide, an inclined tank 20 so disposed slantingly to the lower side of the guide rails 18, and a vibration application apparatus 21 to apply vibration to the carrying out members 16 through the guide rails 18 and the guide members 19.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sand sorter and a trommel usable for the same, and more particularly, to a final process for producing high-quality crushed sand using a crushed sand manufacturing device for concrete. A sand sorting device that separates the sand of the grain size from the sand of the non-standard size and separates the water contained in the sand of the inside standard size; It relates to trommel for separation.

[0002]

2. Description of the Related Art An apparatus for producing crushed sand for concrete supplies raw sand and water into a cylindrical drum containing a medium stone, and agitates the medium stone with the rotation of the cylindrical drum. Is a device that produces crushed sand by crushing or grinding. The crushed sand crushed to the standard particle size passes through a sieve mesh provided on the outer peripheral surface of the discharge-side end of the cylindrical drum together with water, and is discharged out of the crushed sand production device for concrete.

[0003] The sand sorting apparatus separates the crushed sand of the specified size and the crushed sand of the non-specified size discharged from the crushed sand production device for concrete, and separates water contained in the crushed sand of the specified size. For example, Japanese Patent Application Laid-Open
FIG. 1 shows a sand sorter 201 described in Japanese Patent Application Laid-Open No. 10-305237.
It is shown in FIG. This means that sand and water are rotatably arranged in the water tank 202, and sand and water are supplied in a mixed state from one end in the axial direction. A generally cylindrical trommel 204 for discharging nonstandard sand out of the water tank 202 from the end side.
And an endless winding transmission member 206 wound around a pair of transmission wheels 205 and a plurality of unloading members 207 connected to the winding transmission member 206. A sand unloading device 208 for unloading to the outside, a guide member 209 arranged along the sand unloading direction by the unloading member 207, and regulating the movement of the unloading member 207 in the direction orthogonal to the unloading direction at the time of unloading. 209
A vibration imparting device 210 for imparting vibration to the unloading member 207 via the
Sorting apparatus 201 having a support member 211 for supporting the sand
It is.

As shown in FIG. 20, the trommel 204 of such a conventional sand sorter 201 has a first small-diameter portion 212 at one axial end, a second small-diameter portion 213 at the other axial end, and
A large-diameter portion 214 having a sieve mesh 203 on the outer periphery is provided therebetween. The end of the first small diameter portion 212 is the large diameter portion 2.
14, the inner peripheral surface 216 of the first small diameter portion 212 and the inner peripheral surface 217 of the end wall 215 of the large diameter portion 214 are substantially orthogonal to each other. The small-diameter portion 213 has an end inserted into the large-diameter portion 214 to form a cylindrical insertion portion 218 having the same diameter as the second small-diameter portion 213. Then, as shown in FIG. 21 which is a cross-sectional view taken along the line EE of FIG. 20, a mesh having substantially the same roughness as the sieve mesh 203 is provided between the inner peripheral surface 220 of the large diameter portion 214 and the insertion portion 218. And a large-diameter portion 21 is provided.
4 is sent to the inner peripheral surface 216 of the insertion portion 218 as the trommel 204 rotates. As shown in FIG. 20, a feed plate 223 for feeding sand toward the discharge port 222 with the rotation of the trommel 204 is provided on the inner peripheral surface 221 of the second small diameter portion 213.

[0005] As shown in FIG.
4, a plurality of push-up plates 22 projecting radially outward to push up the sand in the water tank 202 along the inclined wall portion 224.
5 is provided, and the lower end position of the circulating movement path of the carry-out member 207 by the winding transmission member 206 of the sand carry-out device 208 is positioned near the water surface in the water tank 202, and the push-up plate 225 is provided. To scoop up the sand pushed up near the water surface.

[0006] The guide member 209 is connected to the carry-out member 2.
07, a roller having a guide groove at an axially intermediate portion is fixed coaxially with a plurality of support shafts 226 arranged at regular intervals in the sand discharge direction. Then, when the unloading member 207 moves on the guide member 209,
By sequentially engaging the protrusions on the lower surface side of the carrying-out member 207 with the guide grooves, the movement in the direction perpendicular to the sand carrying-out direction is restricted, and the vibration from the vibration applying device 210 is transmitted via the guide member. Is transmitted to apply vibration to the carrying-out member 207.

[0007]

However, such a conventional sand sorter 201 has the following problems. That is, as shown in FIG. 20, the trommel 204 includes an inner peripheral surface 216 of the first small-diameter portion 212 and the end wall of the large-diameter portion 214 at a connection portion between the first small-diameter portion 212 and the large-diameter portion 214. When the sand and water supplied to the first small-diameter portion 212 in a mixed state move to the large-diameter portion 214, the inner wall surface of the end wall 215 of the large-diameter portion 214 Since it travels along the inner surface 217, there is a problem that quick movement of sand and water cannot be secured. Further, as shown in FIG. 21, since the mesh plate 219 for sending sand from the inner peripheral surface 220 of the large diameter portion 214 to the inner peripheral surface 221 of the second small diameter portion 213 is a flat plate, the trommel 204 Is rotated, and when the inclination of the mesh plate 219 reaches a certain angle, the sand falls linearly and is sent into the second small diameter portion 213.
There is also a problem in that the mesh plate 219 is not sufficiently sieved out of the sand of the standard size, and a considerable amount of the sand of the standard size is mixed with the sand of the non-standard size and discharged to the outside of the water tank 202.

Further, as shown in FIG. 19, the sand unloading device 208 includes
Is positioned so that the lower end position of the circulation movement path is near the water surface in the water tank 202 and scoops up the sand pushed up near the water surface by the push-up plate 225. Even if the large sand is pushed up to the vicinity of the water surface, it is settled immediately, so that the amount of sand that is scooped by the carrying-out member 207 at one time is reduced,
There is a problem that the scooped-up sand tends to have a small particle size.

Further, the guide member 209 is constituted by a plurality of support shafts 226 and rollers arranged at a predetermined interval, and the guide members 209 are discontinuously and sequentially engaged with the carry-out member 207 to transmit vibration. A portion where vibration is not transmitted to the discharge member 207 occurs between the adjacent rollers, and the vibration from the vibration imparting device 210 cannot be transmitted efficiently, so that drainage from the discharge member 207 is effectively performed. There is no problem. Further, although the guide member 209 is a member that is intensely worn due to contact with the carry-out member 207, it is difficult to replace the guide member 209 and the cost increases. .

The present invention has been made in view of the above-mentioned problems, and in the above-mentioned trommel, while ensuring rapid movement of sand inside, separation of sand having a standardized particle size and sand having a non-standardized particle size is performed. In the sand unloading device, it is possible to carry out a large amount of sand uniformly, and to efficiently transmit vibrations to the unloading member. It is an object of the present invention to provide a sand sorting device capable of ensuring a high drainage performance.

[0011]

The specific means for solving the above technical problems are as follows. That is, the sand sorting device according to claim 1 is a water tank, which is rotatably arranged in the water tank, supplies sand and water in a mixed state from a supply port, and passes sand having a standard particle size through a sieve mesh on the outer periphery. A generally cylindrical trommel for discharging sand having a non-standard particle size from the discharge port to the outside of the water tank while discharging the sand into the water tank, an endless winding transmission member wound around a plurality of transmission wheels, and the winding transmission A sand unloading device that has a plurality of unloading members connected to the member and that unloads the sand with the specified grain size out of the water tank, and a straight line that is linearly arranged along a sand unloading direction of the unloading member. A guide rail having a shape, a guide member fixed to the lower surface of the carry-out member and slidably engaged with the guide rail to regulate movement of the carry-out member in a direction orthogonal to the sand carry-out direction; To cover under the guide rail An inclined tank that is disposed obliquely and collects water discharged from the discharge member, and a vibration applying device that vibrates the guide rail and applies vibration to the discharge member via the guide member. It is characterized by the following.

According to a second aspect of the present invention, in the sand sorting apparatus according to the first aspect, the inclined tank is separated from the water tank and independently supported by a support member, and the vibration imparting device is tilted. The guide rail is coupled to a tank, and the guide rail is vibrated through the inclined tank.

According to a third aspect of the present invention, in the sand sorting apparatus according to the first or second aspect, a part of a circulating movement path of the carrying-out member by the wrapping transmission member passes below the trommel. It is assumed that.

According to a fourth aspect of the present invention, there is provided a sand sorting apparatus according to any one of the first to third aspects, wherein the carrying-out member has a bottom wall and a back wall rising vertically from a rear end of the bottom wall. Each of the bottom wall and the back wall is provided with a plurality of drain holes, and the cross-sectional area of the drain hole at the front side of the back wall is provided at the upper edge of the drain hole of the back wall. An introduction portion that is inclined obliquely upward from the rear side toward the front side is formed so as to be larger than the cross-sectional area of the drainage hole, and the unloading member is inclined upward by the winding transmission member at the time of unloading. It is configured to be moved, and at the time of unloading, the introduction portion of the drain hole of the back wall faces substantially vertically.

According to a fifth aspect of the present invention, there is provided a sand sorting apparatus according to any one of the first to fourth aspects, wherein the plurality of trommels are arranged in parallel.

According to a sixth aspect of the present invention, there is provided a sand sorting apparatus according to any one of the first to fifth aspects, wherein a plurality of the sand discharging devices are arranged in parallel.

The trommel according to claim 7 has a first small-diameter portion having a supply port at one axial end, a second small-diameter portion having a discharge port at the other axial end, and a large-diameter portion therebetween. First
In the trommel in which the small diameter portion and the second small diameter portion are each rotatably supported and a sieve mesh is provided on the outer periphery of the large diameter portion, the first small diameter portion is connected to the large diameter portion by a first small diameter portion. A projecting portion is formed that has a conveying surface that is continuous from the inner peripheral surface of the portion and that is provided to protrude into the large-diameter portion. A cylindrical insertion portion to be inserted into the large-diameter portion to have the same diameter as the second small-diameter portion is formed, and an arc-shaped curved net-like plate having a mesh having substantially the same roughness as the sieve net is formed. The inner peripheral surface of the large-diameter portion and a communication hole provided in the insertion portion are connected to form a continuous transport surface.

According to an eighth aspect of the present invention, there is provided the trommel according to the configuration of the seventh aspect, wherein a sieve mesh provided on an outer periphery of the large diameter portion is divided into a plurality by a frame constituting the large diameter portion. The projecting portion is configured to expand the projecting portion body outward at a position corresponding to a radially inward side of the sieve mesh, and a projecting portion main body including a cylindrical portion having the same diameter as the first small diameter portion. And an inclined conveying surface formed by the following.

According to a ninth aspect of the present invention, there is provided the trommel according to the seventh or eighth aspect, wherein a part or all of the inner peripheral surface of the large-diameter portion, the first small-diameter portion and the second small-diameter portion has
A plurality of feed plates forming a feed surface for sending sand to the discharge port side with the rotation are provided.

[0020] A sand sorting apparatus according to claim 10 is the sand sorting apparatus according to any one of claims 1 to 6,
The trommel according to any one of claims 7 to 9 is used.

[0021]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIGS. 1 and 2, a sand sorting device 1 of the present embodiment has a water tank 2 and a large-diameter portion 3 located at an intermediate portion in the axial direction rotatably arranged in the water tank 2. Sand and water are supplied in a mixed state from the supply port 5 of the first small-diameter portion 4 on one end side, and sand having a standard particle size is discharged into the water tank 2 through a sieve mesh 6 on the outer periphery of the large-diameter portion 3. A generally cylindrical trommel 9 for discharging sand having a non-standard particle size from the discharge port 8 of the second small diameter portion 7 at the other end in the axial direction to the outside of the water tank 2, and a plurality of transmission wheels 10, 11, 12, 13, 14;
And a plurality of unloading members 16 connected to the wrapping transmission member 15 and having the endless winding transmission member 15 wound therearound. A device 17 and a linear guide rail 18 that is linearly arranged along the sand discharge direction by the discharge member 16;
A guide member 19 fixed to the lower surface of the carry-out member 16 and slidably engaged with the guide rail 18 to regulate the movement of the carry-out member 16 in a direction perpendicular to the sand carry-out direction; An inclined tank 20 that is disposed to be inclined so as to cover a lower part of the discharge member 18 and collects water discharged from the discharge member 16, and transmits vibration to the guide rail 18, and the discharge member via the guide member 19. 1
6 is provided with a vibration imparting device 21 for imparting vibration.
FIG. 2 is a plan view showing a state in which the winding transmission member 15 and the unloading member 16 of the sand sorting device 1 according to the present embodiment are omitted.

Hereinafter, the structure of the trommel 9 will be described. As shown in FIGS. 3 and 4, the large-diameter portion 3 has a frame structure having the following configuration. That is,
An annular frame 24 having the same diameter as the annular frames 22 and 23 is arranged concentrically at a central portion between the two annular frames 22 and 23 having an L-shaped cross section. Has an annular projection 25 projecting outward in the radial direction.
Are formed integrally and have a T-shaped cross section. For example, four long plate-shaped linear frames 26 are provided on the inner peripheral side of the respective annular frames 22, 23, 24 so as to extend in the axial direction of the annular frames 22, 23, 24. 3 are arranged at intervals of 90 ° in the circumferential direction, and each straight frame 26 is, for example, each annular frame 22, 23,
The annular frames 22, 23, and 24 are integrally connected by welding to the inner peripheral surface of the annular frame.

At one end in the axial direction of the large diameter portion 3, one end wall 27 constituting an end wall excluding a portion connected to the first small diameter portion 4, and at the other axial end of the large diameter portion 3, the second small diameter portion 7 is formed. The other end wall 28 which constitutes the end wall except for the connection portion with the annular frame 2 having the large diameter portion 3 is formed by a concentric hollow plate.
It is formed by being fixed to 2 and 23, respectively. As shown in FIG. 5, which is a cross-sectional view taken along the line AA in FIG. 4, a sieve net 6 made of a net-like body curved in an arc-shaped cross section is detachably attached to the outside of the frame structure. . Further, a perforated iron plate curved in an arc-shaped cross section may be detachably attached to the outside in parallel with the sieve mesh 6.

Here, as shown in FIG. 5, the sieve mesh 6 is divided into four in the circumferential direction of the large-diameter portion 3 in accordance with the number of portions partitioned by the straight frame 26, and
As shown in the figure, the large-diameter portion 3 is divided into two parts in the axial direction before and after the annular frame 24, so that a total of eight sieve meshes 6 can be attached to the large-diameter portion 3. The mesh of the sieve mesh 6 has a roughness that allows only sand having a particle size within the standard to pass. As shown in FIG. 6, each peripheral edge of the sieve mesh 6 holds a shape curved in an arc-shaped cross section by being fixed to a flexible support plate 29 made of a thin metal plate or the like. At both ends in the circumferential direction of the support plate 29, bent portions 30 bent radially outward for attachment to the frame structure are integrally provided. As shown in FIG. 7, a perforated iron plate 31 attached to the outside of the sieve mesh 6 is provided.
Is formed in substantially the same shape as the sieve mesh 6 and, like the sieve mesh 6, is divided into four in the circumferential direction of the large diameter portion 3 and into two in the axial direction. A large number of circular holes 32 are formed on the surface. The size of the circular hole 32 is sufficiently larger than the mesh of the sieve screen 6.

As shown in FIGS. 3 and 5, on the outer peripheral side of each straight frame 26, an outer frame 33 having a U-shaped cross section extending in the axial direction of the annular frames 22, 23, 24 in parallel with the straight frames 26 is arranged. Have been. Then, the sieve mesh 6 having an arc-shaped cross section is arranged along the outer peripheral sides of the annular frames 22, 23, 24. At this time, the bent portions 30 at both ends in the circumferential direction of the sieve mesh 6 are respectively butted against the opposing vertical portions 34 of the two adjacent outer frames 33, and provided on the bent portions 30 and the vertical portions 34, respectively. The bent portion 30 is detachably connected to the vertical portion 34 by a bolt / nut 35 passing through the hole. Also, as shown in FIG.
Both ends in the axial direction of the sieve mesh 6 abut against the vertical portions 36 and 37 of the annular frame 22 on one end or the annular frame 23 on the other end, and abut one side surface of the annular protrusion 25 of the central annular frame 24. It has become. When the perforated iron plate 31 is attached, the perforated iron plate 31 is also attached in parallel with the perforated iron plate 31 so as to cover the perforated iron plate 31 from outside.

As shown in FIGS. 3 and 8, the trommel 9
The first small-diameter portion 4 and the second small-diameter portion 7 are each formed in a cylindrical shape.
8, 39. The support member 38 at one end in the axial direction of the trommel 9 is provided on a base 41 arranged adjacent to one side wall 40 of the water tank 2 via a support tool 42 and a support shaft 43, respectively. Are rotatably arranged. An annular projection 4 is provided on the outer periphery of the first small diameter portion 4.
The first small diameter portion 4 is rotatably supported from both sides by the rotatable engagement of the grooved roller 44 with the annular protrusion 45, and the axial movement of the trommel 9 is restricted.

A driven sprocket 46 is provided on the outer periphery of the first small diameter portion 4. A driving sprocket 48 is mounted on an output shaft of a first motor 47 for driving the trommel 9 to rotate. The driving sprocket 48 and the driven sprocket 46 are connected to a chain 49.
And a chain 49 by the first motor 47.
The trommel 9 is driven to rotate in the direction of the arrow R via.

On the other hand, as shown in FIG. 3, the supporting member 39 at the other axial end of the trommel 9 is connected to the other side wall 50 of the water tank 2.
A pair of grooved rollers 44 is mounted on a base 51 arranged adjacent to the
Are rotatably arranged. An annular projection 52 is formed on the outer periphery of the second small-diameter portion 7, and the groove-shaped roller 44 is rotatably engaged with the annular projection 52, thereby supporting the second small-diameter portion 7 rotatably from both sides. At the same time, the axial movement of the trommel 9 is restricted.

As shown in FIG. 4, a supply port 5 is formed at the end of the first small diameter section 4 opposite to the large diameter section 3, and the supply port 5 has a chute in the first small diameter section 4. The member 53 is inserted. The chute member 53 supplies sand and water in a mixed state into the first small-diameter portion 4 from a concrete sand manufacturing device (not shown) or the like.

As shown in FIG. 4 and FIG. 9, which is a perspective view seen from the AA direction in FIG. 4, the first small diameter portion 4 is connected to the large diameter portion 3 by the first small diameter portion 3. A projecting portion 55 is formed, which has a conveying surface 54 that is continuous from the inner peripheral surface of the portion and is provided to project into the large-diameter portion 3. Thereby, the supply port 5
When the sand and water supplied from the container move into the large-diameter portion 3, the sand and water fall from the tip of the protruding portion 55 and quickly reach the bottom surface of the large-diameter portion 3. Can move quickly from the first small-diameter portion 4 to the large-diameter portion 3 as compared with the case where the water moves along the inner surface of the one end wall 27 of the large-diameter portion 3. Further, the protrusion 55
Is to expand the protruding portion main body 56 outwardly at a position corresponding to a radially inward side of the sieve mesh 6 and a protruding portion main body 56 formed of a cylindrical portion having the same diameter as the first small diameter portion 4. And an inclined conveying surface 57 formed by The position corresponding to the radially inner side of the sieve screen 6 where the inclined transfer surface 57 is provided is defined as a position where the inclined transfer surface 57 and the sieve screen 6 are aligned in a line when viewed from the rotation center of the protrusion 55. Are arranged at four positions in accordance with the sieve mesh 6. As a result, most of the sand and water moving to the large-diameter portion 3 are collected on the inclined conveying surface 57 and fall on the sieve screen 6, and hardly fall on the straight frame 26. In addition, it is possible to more efficiently discharge sand having a particle size within the standard.

As shown in FIG. 4, the connecting portion of the second small-diameter portion 7 with the large-diameter portion 3 is connected to the second small-diameter portion 7 and has the same diameter as the second small-diameter portion 7. A cylindrical insertion portion 58 to be inserted into the inside is formed. A lid 59 is attached to the distal end of the insertion portion 58 with bolts and nuts.

As shown in FIG. 4 and FIG. 10 which is a cross-sectional view taken along the line BB of FIG. 4, the connecting portion of the second small-diameter portion 7 with the large-diameter portion 3 has roughly the same coarseness as the sieve mesh 6. A net-like plate 60 having a net mesh and curved in an arc shape connects the inner peripheral surface of the large-diameter portion 3 and the communication hole 61 provided in the insertion portion 58 to form a continuous transport surface. Is provided. Here, the mesh plate 60 is formed by fixing a flexible support plate made of a thin metal plate or the like similar to the sieve mesh 6 to each peripheral edge of a mesh body formed in a rectangular plate shape having a constant width. It is formed by bending in the longitudinal direction. Here, the two mesh plates 60 are provided so as to form a continuous transport surface from the inner peripheral surface of the large diameter portion 3 to the outer peripheral surface of the insertion portion 58. A radially inner end portion 62 of each mesh plate 60 is connected to a rectangular communication hole 61 provided in the insertion portion 58 so that the transport surface communicates with the insertion portion 58, and a radially outer end portion 62 is formed. End 63
Is fixed to the straight frame 26. At this time, the radially outer end 63 of the mesh plate 60 is more rotated in the rotational direction of the trommel 9 (arrow R direction) than the radially inner end 62.
Arrange so that it is located in front. As a result, when the trommel 9 rotates, sand having a non-standard particle size coarser than the mesh of the mesh plate 60 is inserted into the insertion portion 58 from the inner peripheral surface of the large diameter portion 3 by the mesh plate 60 through the communication hole 61. (See FIG. 18). In addition, the sand of the grain size within the standard is
0 and is returned to the inside of the large diameter portion 3.

As shown in FIG. 11, which is a cross-sectional view taken along the line CC of FIG. 4, the other end wall 28 of the large diameter portion 3 in the mesh plate 60 is formed.
A side wall plate 64 is provided at a side end opposite to the side. The side wall plate 64 is a plate-like body formed in a substantially circular arc shape having a width that is wider on the radially outer side and narrower on the radially inner side of the trommel 9, and whose upper edge is smaller than the conveying surface of the mesh plate 60. Is attached so as to protrude inward in the direction, and sand of a non-standard particle size moving on the transport surface of the mesh plate 60 by forming a side wall of the transport surface is covered with a side end of the mesh plate 60. From falling into the inside of the large-diameter section 3. As shown in FIG. 4, a belt conveyor 65 is disposed below the discharge port 8 of the second small-diameter portion 7 so as to convey sand having a non-standard particle size discharged from the trommel 9. .

As shown in FIGS. 4, 5 and 10, the inner peripheral surfaces of the large-diameter portion 3, the first small-diameter portion 4 and the second small-diameter portion 7 carry sand along with the rotation thereof to the discharge port 8 as shown in FIG. A plurality of feed plates 66 forming a feed surface 67 for feeding to the side are provided. As shown in FIG. 12, the feed plate 66 has a large diameter portion 3 and a first small diameter portion 4.
Alternatively, it is a substantially rectangular plate-like member that stands substantially perpendicularly to the inner peripheral surface of the second small diameter portion 7, and one surface thereof forms the feed surface 67. The feed surface 67 is arranged to be inclined at a certain angle with respect to the rotation direction of the trommel 9, and the sand is sent to the discharge port 8 side by moving along the inclination of the feed surface 67. Although not shown, the feed surface 67 of the feed plate 66 may be provided with a plurality of holes. The opening size of the hole is set to be slightly larger than the roughness of the mesh of the sieve screen 6, and rough sand can be sieved depending on whether or not it passes through the hole. It can be quickly sent to the discharge port 8 side.

Next, the structure of the sand sorting device 1 according to the present embodiment other than the trommel 9, such as the sand unloading device 17, will be described. As shown in FIGS. 1 and 2, the water tank 2 is formed in a substantially cubic shape that is long in the front-rear direction of the sand sorter 1, that is, in the longitudinal direction, and has a width larger than the length of the large diameter portion 3 of the trommel 9. have. The water tank 2 has a drain hole 69 in a front end wall 68 thereof, and is adjusted so that the height of the water surface in the water tank 2 is constant. An inclined surface 70 is formed near the rear end of the water tank 2, and the inclined surface 70 forms a rear end wall of the water tank 2. The trommel 9 is disposed so that its rotation axis is slightly in front of the center of the water tank 2 and parallel to the width direction of the water tank 2, and the lower part of the large diameter portion 3 is immersed in the water in the water tank 2.

The sand discharge device 17 includes a plurality of transmission vehicles 1.
It has an endless winding transmission member 15 wound around 0, 11, 12, 13, and 14 and a plurality of unloading members 16 connected to the winding transmission member 15. This is to scoop up the sand having the standard particle size discharged into the water tank 2 and carry it out of the water tank 2.

The plurality of transmission vehicles 10, 11, 12, 1
3 and 14, two sprockets arranged in parallel are configured as a pair, and the rotating shaft 71 is supported on the side walls 40 and 50 at the forefront of the water tank 2,
The lower part thereof is supported by a pair of first sprockets 10 immersed in the water in the water tank 2 and the side walls 40 and 50 of the water tank 2 behind the trommel 9, and the rotation shaft 72 is supported by the lower part in the water tank 2. A pair of left and right first struts 73 and a pair of left and right first sprockets 73 erected adjacent to the outside of the side walls 40 and 50 of the water tank 2 in front of and behind the trommel 9, respectively, are immersed in water. 2 pillars 7
The rotation shafts 75 and 76 are respectively supported on the upper part of 4,
A pair of fifth sprockets 14 and a pair of fourth sprockets 13 arranged at a position higher than the trommel 9, and a pair of left and right support beams 77 extending rearward from the second support 74, and a rotating shaft 78 thereof. Is supported by the fifth
It is arranged at substantially the same height as the sprocket 14 and the fourth sprocket 13 and is constituted by a pair of third sprockets 12 driven to rotate by the second motor 79. Note that the support beam 77 is also supported by a third support 80 erected behind the second support 74. A hopper 81 is provided below the third sprocket 12, and a belt conveyor 82 is provided below the hopper 81.

The sand discharge device 17 has two endless winding transmission members 15 arranged in parallel, and the winding transmission members 15 are respectively the first to fifth sprockets 10, 11, 12, 13, and 14.
Here, a chain is used as the wrapping transmission member 15. In order to adjust the tension of the wrapping transmission member 15, the supporting portion of the rotating shaft 71 of the first sprocket 10 is movable in the front-rear direction. That is, the rotation shaft 71 of the first sprocket 10 is attached to the side wall 40 of the water tank 2,
Since the support member 83 is supported by being attached to the upper surface of the support member 50, the tension of the wrapping transmission member 15 can be increased by moving the support member 83 forward, and can be increased by moving the support member 83 rearward. The tension of the hook transmission member 15 can be relaxed.

The second motor 79 is fixed behind the third sprocket 12 on the upper surface of the support beam 77. A driving sprocket 84 is mounted on the output shaft of the second motor 79, and a driven sprocket 85 is mounted coaxially with the third sprocket 12, and a driving chain 86 is wound around the driving sprocket 84 and the driven sprocket 85 to form a second sprocket. The driving force of the motor 79 is transmitted to the third sprocket 12. And the second motor 7
By rotating the third sprocket 12 according to 9, the wrapping transmission member 15 can be driven to circulate.

A plurality of carrying-out members 16 are attached to the pair of winding transmission members 15 at predetermined intervals. FIG.
As shown in FIG. 3 and FIG. 14, the carrying-out member 16 has a bottom wall 87, a back wall 88 that rises vertically from the rear end of the bottom wall 87, and a pair of left and right side walls 89 integrally formed of synthetic resin or the like. The bottom wall 87 and the back wall 8 are formed between the side walls 89.
A plurality of ribs 90 are formed integrally with each other to form a wall parallel to the side wall 89 by connecting the plurality of ribs 90 to each other. A large number of drain holes 91 are formed in the bottom wall 87, and a large number of drain holes 92 are also formed in the back wall 88.

As shown in FIG. 15, the drain hole 9 of the back wall 88 is provided.
2 is inclined obliquely upward from the rear side to the front side such that the cross-sectional area of the drain hole 92 on the front side of the back wall 88 is larger than the cross-sectional area of the drain hole 92 on the rear side. The formed introduction portion 114 is formed. The introduction unit 11
Numeral 4 is formed so that the unloading member 16 faces substantially vertically when the unloading member 16 is inclined as shown in FIG. On the other hand, the drain hole 91 of the bottom wall 87 is formed in a normal circular hole shape.

The unloading member 16 is connected to the wrapping transmission member 15 via a support member 93. That is, as shown in FIGS. 13 and 14, the support member 93 connects the upper ends of a pair of front and rear U-shaped members 94 and 95 made of metal with a pair of right and left straight frames 96, and A pair of left and right mounting plates 97 for connection to the wrapping transmission member 15 are fixed to the front of the upper surface of the linear frame 96. One mounting transmission member 15 is connected to each mounting plate 97. The lower end of the front U-shaped member 94 is connected to the bottom wall 87, and the rear U-shaped member 95 is connected to the back wall 88, so that the support member 93 is integrally fixed. At the front end of the bottom wall 87, a metal introducing plate 98 for introducing sand accumulated on the bottom surface of the water tank 2 into the carrying-out member 16 is attached. An inclined portion 99 is formed.

As shown in FIG. 14, the lower surface of the carry-out member 16, ie, the lower surface of the bottom wall 87, is slidably engaged with a guide rail 18 to be described later, ie, in the sand carry-out direction, 2 for regulating the movement of the unloading member 16 in a direction orthogonal to the driving direction of the winding transmission member 15
The guide members 19 are provided in parallel with each other. Each of the guide members 19 has a trapezoidal groove 100 that is long in the front-rear direction, that is, in the sand discharge direction.
As shown in FIG. 16 which is a cross-sectional view, the trapezoidal groove 100 engages from above the guide rail 18. The length of the guide member 19 is formed to be substantially the same as the length of the bottom wall 87 of the carrying-out member 16 in the front-rear direction. Although the material of the guide member 19 is not particularly limited, it is preferable that the material has high wear resistance and elasticity. For example, abrasion-resistant rubber or abrasion-resistant synthetic resin can be used. Here, the reason why it is desirable to have elasticity is to prevent generation of noise due to collision between the guide rail 18 and the guide member 19 engaged with the guide rail 18 when the guide rail 18 is vibrated.

As shown in FIGS. 1 and 2, the guide rail 18 is formed of a linear member that is linearly arranged along the direction in which sand is carried out by the carry-out member 16.
Here, the unloading member 16 is moved obliquely rearward and upward from the rear end of the water tank 2 at a portion of the winding transmission member 15 connecting the second sprocket 11 and the third sprocket 12, thereby forming the water tank 2. The sand inside is to be carried out. That is, the direction in which the sand is carried out by the carry-out member 16 is a direction in which the winding transmission member 15 moves obliquely rearward and upward in parallel with a portion connecting the second sprocket 11 and the third sprocket 12. Therefore, the guide rail 18 is arranged below the portion of the winding transmission member 15 connecting the second sprocket 11 and the third sprocket 12 so as to be parallel to the winding transmission member 15 of the portion. It extends linearly obliquely rearward and upward from the vicinity of the rear end of the water tank 2.

The guide rail 18 is formed of a long rectangular flat plate having a constant thickness, and is arranged vertically so that one edge in the width direction becomes an upper surface, that is, a sliding surface with the guide member 19. Then, the two guide rails 18 are arranged at an interval equal to the interval between the two guide members 19 provided on one unloading member 16 so as to be engageable with the guide member 19.
Are arranged in parallel. Here, the guide rail 18
As will be described later, it is fixed inside the inclined tank 20 and arranged at a predetermined position, and has a length from the vicinity of the rear end of the water tank 2 to the vicinity of the hopper 81.

As shown in FIG. 1 and FIG.
Numeral 0 is for recovering the water discharged from the carrying-out member, which is disposed so as to be inclined so as to cover below the guide rail 18. Specifically, the inclined tank 20 is a groove-shaped member having a substantially U-shaped cross section, and has a slightly longer length than the guide rail 18, and as shown in FIG.
6 has a width that is sufficiently larger than the width.

A guide rail 18 is fixed inside the inclined tank 20. The fixing structure of the guide rail 18 is as follows. That is, as shown in FIGS. 1 and 16, a plurality of shaft insertion holes 101 are formed at regular intervals in the guide rail 18, and a plurality of support shafts 102 are inserted through the shaft insertion holes 101. The guide rails 18 are fixed to the inclined tank 20 by fixing both ends of the support shaft 102 to the side walls 103 on both sides of the inclined tank 20, respectively. A cylindrical stopper 104 is provided between the side walls 103 on both sides of the inclined tank 20 and the guide rail 18 and between the two guide rails 18, respectively.
02, the guide rail 18 is positioned in the left-right direction. The support shaft 102 is fixed to the inclined tank 20 by the support shaft 10.
2, a male screw 105 is formed at both ends, and a shaft fixing hole 106 is formed on each side wall of the inclined tank 20, and both ends of the support shaft 102 are inserted into the holes 106, respectively. This is achieved by screwing a nut 107 into the male screw 105 projecting to the side.

As shown in FIGS. 1 and 16, on the lower surface of the inclined tank 20, a vibration is applied to vibrate the guide rail 18 and apply vibration to the carry-out member 16 via the guide member 19. The device 21 is connected. As the vibration imparting device 21, for example, a vibration motor or the like can be used, but is not limited thereto. Any device that can generate a constant vibration can be used.

The inclined tank 20 is separated from the water tank 2 and independently supported by a support member 108. Specifically, as shown in FIG. 16, two support frames 109 long in the width direction of the inclined tank 20 are fixed to the lower surface of the inclined tank 20 in parallel with each other, and the support frames 109 are respectively provided with vibration isolating members. The inclined tank 20 is supported by being placed on two support pillars 111 vertically provided on the floor via 110. Anti-vibration member 110
For example, a vibration-proof rubber formed in a cylindrical shape or the like can be used. At this time, as shown in FIG. 1, the front end 112 of the inclined tank 20 is disposed so as to have a gap between the front end 112 and the inclined surface 70 constituting the rear end wall of the water tank 2.

Accordingly, when the inclined tank 20 is vibrated by the vibration imparting device 21, the vibration is interrupted by the vibration isolating member 110, so that the vibration is not transmitted to the support column 111. Since there is a gap between the water tank 2 and the water tank 2, no vibration is transmitted to the water tank 2. Therefore, only the inclined tank 20 can be vibrated by the vibration applying device 21, and the vibration is not transmitted over a wide range.
Can be vibrated efficiently.

The support frame 109 fixed to the inclined tank 20 is connected to the support beam 77 located above at both ends by wires 113 capable of adjusting the expansion and contraction. The anti-vibration member 110 is fixed to the inclined tank 20 and is detachably attached to the support column 111 by being fitted from above. Therefore, the wire 113 is shortened by the adjusting mechanism, and the inclined tank 20 is lifted up.
The vibration isolating member 110 is separated from the support pillar 111. Then, if the support pillar 111 is moved to another place, the inclined tank 2
0 can be easily lowered to the floor surface, and maintenance such as replacement of the guide rail 18 and the like can be performed.

In the sand sorter 1 according to the present embodiment, the trommel 9 and the sand unloading device 17 are provided one by one. However, in order to increase the throughput of the sand sorter 1, the trommel 9 and the sand remover 17 are provided. It is also possible to arrange a plurality of sand sorters 8 in parallel.

Hereinafter, the operation of the sand sorting apparatus having the above configuration will be described. First, the classification of sand by the trommel 9 will be described. As shown in FIGS. 3 and 8, during operation, the trommel 9 is driven by the first motor 47 to be driven on the drive sprocket 48, the chain 49 and the first small diameter portion 4. It is rotationally driven in the direction of arrow R via a sprocket 46. In this state, sand and water are supplied into the first small diameter portion 4 of the trommel 9 via the chute member 53 from a concrete sand manufacturing device or the like (not shown).

The sand and water introduced into the first small-diameter portion 4 move toward the large-diameter portion 3 by the feed plate 66, and fall from the tip of the projecting portion 55 to the bottom of the large-diameter portion 3 (see FIG. 4). 4). Then, as shown in FIG. 17, with the rotation of the large diameter portion 3, as shown in FIG. 17, when a perforated iron plate 31 is further provided through the circular holes 32 of the perforated iron plate 31, In other words, sand S having a particle size capable of passing through the mesh of the sieve screen 6
1 and water are discharged into the water tank 2. Here, since the feed plate 66 is provided on the inner peripheral surface of the large diameter portion 3, sand and water are agitated by the feed plate 66, and the discharge of the sand S1 having the standard particle size is promoted. At the same time, sand S2 having a non-standard particle size that does not pass through the mesh of the sieve mesh 6 is quickly sent to the second small diameter portion 7 side. When the outside of the sieve mesh 6 is covered with the perforated iron plate 31, damage to the sieve mesh 6 from the outside is prevented.

As shown in FIG. 18, the sand that has reached the connection between the large-diameter portion 3 and the second small-diameter portion 7 at the discharge-side end is removed from the large-diameter portion 3.
Is rotated by the mesh plate 60, and the mesh plate 60 has a mesh of the same size as the sieve mesh 6, so that the sand S1 having the in-standard particle size passes through the mesh plate 60. It falls again to the bottom in the large diameter part 3, and is eventually discharged into the water tank 2 through the sieve screen 6. Here, the mesh plate 60
Has a curved shape in the shape of an arc, and its inclination angle is gentler downward as it goes along the arc shape.
The sand that is scooped up by the net-like plate 60 and moves on it moves downward with the rotation of the trommel 9,
Since the moving speed becomes slow at a portion where the inclination angle is gentle, the moving speed is gradually increased, and furthermore, since the conventional mesh plate 60 moves a longer distance than the case of the flat plate shape,
It is possible to increase the efficiency of re-sieving the sand S1 having the in-specification particle size.

On the other hand, sand having a non-standard particle size,
The sand S2 larger than the mesh 0 is scooped up by the mesh plate 60, moves downward with the rotation of the large-diameter portion 3, passes through the communication hole 61, falls into the insertion portion 58, and from the insertion portion 58. It is sent to the outlet 8 of the second small diameter portion 7 by the feed plate 66,
It is discharged from the outlet 8 to the belt conveyor 65 outside the trommel 9 (see FIG. 4).

At the connection between the second small diameter portion and the large diameter portion, a mesh plate 60 for scooping only the non-standard size sand S2 is provided. Since the small-diameter portion 7 is fed, sand S2 having a non-standard particle size can be smoothly discharged. Further, even if the sand S1 having the standardized particle size is once scooped by the mesh plate 60, the sand S1 having the standardized particle size falls to the bottom side of the large-diameter portion 3 through the mesh of the mesh plate 60. It is hardly discharged from the small diameter portion 7 side.

Next, a description will be given of the work of carrying out the sand S1 having the standard particle size from the water tank 2. As shown in FIG. 1, the height of the water surface in the water tank 2 is kept constant by a drain hole 69 provided in a front end wall 68, and the trommel 9 has a large diameter portion 3.
Is disposed at a height at which it is immersed in the water tank 2, so that the sand supplied into the trommel 9 is fluidized by being immersed in the water in the water tank 2 in addition to the water supplied at the same time. And the separation is promoted and the sieving efficiency is increased.

On the other hand, the second motor 79 on the support beam 77
Rotates the third sprocket 12 via the driving sprocket 84, the driving chain 86 and the driven sprocket 85, whereby the winding transmission member 15 is wound around the first to fifth sprockets 10, 11, 12, 13, 14. Circular drive is performed in the hung state.

Each of the unloading members 16 attached to the winding transmission member 15 is immersed in the water in the water tank 2 from the front side of the first sprocket 10 in accordance with the circulation drive of the winding transmission member 15, and Pass below 9. At this time, the unloading member 16 removes the sand S1 discharged from the trommel 9 and falls, and the sand S1 that has already fallen and accumulated at the bottom of the water tank 2.
1. Scoop up and store in it. Since the introduction plate 98 (see FIG. 13) is attached to the tip of the bottom wall 87 of the carrying-out member 16, the sand S1 is smoothly taken into the carrying-out member 16. Should the introduction plate 98 be damaged,
Only the introduction plate 98 needs to be replaced.

Thereafter, the carrying-out member 16 containing the sand S1
At a portion passing under the second sprocket 11 and coming out of the water and connecting the second sprocket 11 and the third sprocket 12, obliquely rearward and upward from the rear end of the water tank 2 while being guided by the guide rail 18. Go to At this time, as shown in FIG. 16, the guide member 19 fixed to the lower surface of the carrying-out member 16 slides and moves while engaging with the guide rail 18, so that it is orthogonal to the moving direction of the carrying-out member 16. The movement of the carry-out member 16 in the direction is regulated.

The vibration motor 7 of the vibration applying device 21
The vibration is transmitted to the guide rail 18 via the inclined tank 20 by the 4 and the vibration is applied to each of the carrying-out members 16 via the guide member 19, so that the carrying-out member 16 vibrates, and the bottom wall 87 and the back Water is forcibly drained from the carrying-out member 16 through the drain holes 91 and 92 of the wall 88. In this case, as described above, the introduction portion 114 of the drain hole 92 of the back wall 88 in a state where the unloading member 16 is inclined on the inclined tank 20.
Are oriented in a substantially vertical direction, so that drainage from the drainage holes 92 is performed more effectively, and clogging of the drainage holes 92 is less likely to occur. The water discharged from the carry-out member 16 flows on the inner side surface of the inclined tank 20 arranged so as to cover the lower part of the guide rail 18 and forms a rear end wall of the water tank 2 from a front end 112 thereof. Falling on the slope 70,
From there, it is returned into the water tank 2.

The unloading member 16 that has passed over the guide rail 18 and has reached the third sprocket 12 is turned upside down above the third sprocket 12, so that sand S 1 having a standardized particle size is hopper 81. The sand S1 is discharged from the hopper 81 to the belt conveyor 82.
Is discharged by Unloading member 16 that has finished discharging sand S1
Passes through the fourth sprocket 13 and the fifth sprocket 14 from the third sprocket 12 and passes through the first sprocket 1
From the front side of the water tank 2, the process moves to a descending process of dipping again in the water in the water tank 2, and the sand S <b> 1 is scooped up again in the water tank 2.

[0064]

As is apparent from the above description, according to the sand sorter according to the first aspect of the present invention, the supplied sand is separated into sand having a standardized particle size and sand having a non-standardized particle size. In addition to the effect of being able to separate the water contained in the sand of the standard particle size, a linear guide rail linearly arranged along the direction in which the sand is carried out by the carrying-out member, A guide member fixed to the lower surface and slidably engaged with the guide rail to regulate the movement of the carry-out member in a direction orthogonal to the sand carry-out direction. Can be continuously engaged and the vibration can be constantly transmitted, so that the vibration can be efficiently transmitted from the vibration applying device to the discharge member, and the drainage from the discharge member can be effectively performed. In addition, by providing an inclined tank that is inclined so as to cover the lower part of the guide rail, water discharged from the carrying-out member can be collected and returned to the water tank.

According to a second aspect of the present invention, in addition to the effects described above, in addition to the above-described effects, the inclined tank is separated from the water tank and independently supported by a supporting member, and the vibration applying device is connected to the inclined tank. By vibrating the guide rail through the inclined tank, the vibration applied by the vibration applying device is not transmitted to other parts such as a water tank, and the vibration is transmitted through the inclined tank, the guide rail, and the guide member. Thus, there is an advantage that the noise is effectively transmitted to the carrying-out member and the generation of noise due to the vibration is reduced.

According to the sand sorting device of the third aspect of the present invention, in addition to the above-described effects, a part of the circulating movement path of the carrying-out member by the wrapping transmission member passes below the trommel, Since the carrying-out member can scoop up the sand discharged from the trommel and the sand that has fallen and the sand that has already fallen and accumulated at the bottom of the water tank, the sand can be stored in the inside thereof.
You can surely scoop up a large amount of sand at one time,
Unlike the conventional method, the sand that is scooped is not biased toward small particles, so that a large amount of uniform sand can be carried out.

According to the sand sorting device of claim 4 of the present invention, in addition to the above-mentioned effects, the carrying-out member has a bottom wall and a back wall which rises vertically from the rear end of the bottom wall, Each of the bottom wall and the back wall is provided with a plurality of drain holes, and the cross section of the drain hole on the front side of the back wall is formed at the upper edge of the drain hole on the back wall. An introduction portion that is inclined obliquely upward from the rear side to the front side so as to be larger than the area is formed, and the unloading member is moved obliquely upward in the inclined posture by the winding transmission member during unloading. When the sand is carried out obliquely upward by the carry-out member, the water near the back wall of the carry-out member is It is smoothly introduced into the drain hole through the introduction section, and this drain hole Since the al drained, the advantage of improved drainage efficiency.

According to the sand sorting apparatus of the fifth aspect of the present invention, in addition to the above-described effects, by arranging a plurality of the trommels in parallel, a larger amount of sand can be used for sand having a standard particle size and a non-standard particle size. And the amount of processing by the sand sorter can be greatly increased.

According to the sand sorting device of the sixth aspect of the present invention, in addition to the above-described effects, by disposing a plurality of the sand discharging devices in parallel, a larger amount of sand is discharged from the water tank.
Since the wastewater can be drained, the throughput of the sand sorting device can be greatly increased.

According to the trommel according to claim 7 of the present invention, the connecting portion of the first small diameter portion with the large diameter portion has a transfer surface continuous from the inner peripheral surface of the first small diameter portion and has a large diameter. By forming the protruding portion provided to protrude into the portion, the first
When sand and water supplied from the supply port of the small-diameter portion move into the large-diameter portion, they fall from the tip of the protruding portion and quickly reach the bottom surface of the large-diameter portion. Sand and water can be moved more quickly than when water moves along the inner surface of one end wall of the large diameter portion. A cylindrical insertion portion is formed at a connection portion of the second small-diameter portion with the large-diameter portion, the cylindrical insertion portion being inserted into the large-diameter portion to have the same diameter as the second small-diameter portion following the second small-diameter portion. An arcuately curved mesh plate having a mesh of approximately the same roughness as the sieve mesh connects the inner peripheral surface of the large diameter portion and the communication hole provided in the insertion portion to form a continuous transport surface. The sand that is scooped up by the mesh plate and moves on it moves gradually from the steep slope part to the gentle slope part with the rotation of the trommel. In addition, since the conventional mesh plate moves over a longer distance than in the case of a flat plate shape, the efficiency of re-sieving sand having a particle size within the standard can be increased.

According to the trommel according to claim 8 of the present invention, in addition to the above effects, the sieve mesh provided on the outer periphery of the large diameter portion is divided into a plurality by the frame constituting the large diameter portion. In the case, the projecting portion expands the projecting portion body outward at a position corresponding to a radially inward side of the sieve mesh, and a projecting portion main body formed of a cylindrical portion having the same diameter as the first small diameter portion. By having the inclined conveying surface formed by doing, most of the sand and water moving to the large diameter portion will be collected on the inclined conveying surface and fall on the sieve mesh, the frame Since it hardly falls on the sand, the sand with the particle size within the standard can be discharged more efficiently.

According to the trommel according to the ninth aspect of the present invention, in addition to the above-described effects, a part or all of the inner peripheral surface of the large diameter portion, the first small diameter portion, and the second small diameter portion is provided. By providing a plurality of feed plates forming a feed surface for sending sand to the discharge port side with the rotation, sand and water can be sent to the discharge port side at a constant speed inside the trommel. Can be prevented from accumulating at one location and obstructing the flow. In addition, particularly in the large diameter portion, the feed plate also has an action of appropriately stirring sand and water, so that the efficiency of sieving of sand by the sieve net can be increased.

According to the sand sorter of the tenth aspect of the present invention, a sand sorter having both the above-described effects of the trommel and the above-described effects of the sand sorter can be provided.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating a sand sorting device according to an embodiment of the present invention.

FIG. 2 is a plan view showing a state in which a winding transmission member and an unloading member are omitted in the sand sorting device according to the embodiment.

FIG. 3 is a front view of the trommel according to the embodiment.

FIG. 4 is a sectional view of the trommel according to the embodiment.

FIG. 5 is a sectional view taken along line AA of FIG. 4;

FIG. 6 is a perspective view showing a trommel sieve net according to the present embodiment.

FIG. 7 is a perspective view showing a perforated iron plate of the trommel according to the present embodiment.

FIG. 8 is a side view of the trommel according to the present embodiment as viewed from the supply port side.

FIG. 9 is a perspective view seen from the AA direction in FIG. 4;

FIG. 10 is a sectional view taken along line BB of FIG. 4;

FIG. 11 is a sectional view taken along the line CC of FIG. 4;

FIG. 12 is a perspective view showing a feed plate of the trommel according to the embodiment.

FIG. 13 is an upper perspective view showing a carry-out member of the sand carry-out device according to the present embodiment.

FIG. 14 is a lower perspective view showing a discharge member of the sand discharge device according to the embodiment.

FIG. 15 is a cross-sectional view showing an unloading member of the sand unloading device according to the embodiment.

FIG. 16 is a sectional view taken along line DD of FIG. 1;

FIG. 17 is a sectional view taken along line AA of FIG. 4 in use.

18 is a sectional view taken along the line BB of FIG. 4 at the time of use.

FIG. 19 is a sectional view showing a sand sorting device according to a conventional example.

FIG. 20 is a sectional view showing a trommel according to a conventional example.

FIG. 21 is a sectional view taken along line EE of FIG. 20;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sand sorter 2 Water tank 3 Large diameter part of trommel 4 First small diameter part of trommel 5 Trommel supply port 6 Sieve mesh of trommel 7 Second small diameter part of trommel 8 Outlet of trommel 9 Trommel 10, 11, 12, 13 , 14 Transmission wheel 15 Winding transmission member 16 Unloading member 17 Sand unloading device 18 Guide rail 19 Guide member 20 Inclined tank 21 Vibration imparting device 54 Projection conveying surface 55 Projection 56 Projection main body 57 Projection inclined transportation surface 58 Insertion part 60 Reticulated plate 61 Communication hole 66 Feed plate 67 Feed surface 87 Bottom wall of discharge member 88 Back wall of discharge member 91, 92 Drain hole of discharge member 108 Support member of inclined tank 114 Introduction part of discharge hole of discharge member

Claims (10)

[Claims] 1. A water tank, which is rotatably disposed in the water tank, supplies sand and water in a mixed state from a supply port, and discharges sand having a specified particle size into the water tank through an outer sieve mesh. A generally cylindrical trommel for discharging sand having a non-standard particle size from the outlet to the outside of the water tank; an endless winding transmission member wound around a plurality of transmission wheels; and a plurality of unloading members connected to the winding transmission member. A sand take-out device having a member and carrying out the sand of the standard particle size out of the water tank; a linear guide rail linearly arranged along a sand carry-out direction by the carry-out member; A guide member fixed to the lower surface of the member and slidably engaged with the guide rail to restrict movement of the carry-out member in a direction perpendicular to the sand carry-out direction; The unloading is arranged at an angle An inclined tank for collecting the water discharged from the timber, said guide rail is vibrated, sand sorting device and a vibration imparting device for imparting vibration to the carry-out member through said guide member. 2. The method according to claim 2, wherein the inclined tank is separated from the water tank and independently supported by a support member, and the vibration applying device is coupled to the inclined tank, and the guide rail is vibrated through the inclined tank. The sand sorting apparatus according to claim 1, wherein: 3. The sand sorting apparatus according to claim 1, wherein a part of a circulation movement path of the carry-out member by the winding transmission member passes below the trommel. 4. The carrying-out member has a bottom wall and a back wall that rises vertically from a rear end of the bottom wall. The bottom wall and the back wall are provided with a plurality of drain holes, respectively, and the back wall is provided. At the upper edge of the drain hole, an introduction inclined obliquely upward from the rear side to the front side so that the cross-sectional area of the drain hole on the front side of the back wall is larger than the cross-sectional area of the drain hole on the rear side. A portion is formed, and the carrying-out member is configured to be moved obliquely upward in an inclined posture by the wrapping transmission member at the time of carrying out, and at the time of carrying-out, the introduction portion of the drain hole of the back wall has a substantially vertical direction. The sand sorting device according to any one of claims 1 to 3, which is directed to the sand sorting device. 5. The sand sorting apparatus according to claim 1, wherein a plurality of the trommel are arranged in parallel. 6. The sand sorting device according to claim 1, wherein a plurality of the sand discharging devices are arranged in parallel. 7. A first small-diameter portion having a supply port at one end in the axial direction, a second small-diameter portion having a discharge port at the other end in the axial direction, and a large-diameter portion between the first small-diameter portion and the second small-diameter portion. In a trommel having a small diameter portion rotatably supported and a sieve mesh provided on an outer periphery of the large diameter portion, an inner peripheral surface of the first small diameter portion is provided at a connection portion of the first small diameter portion with the large diameter portion. A projecting portion that is provided so as to protrude into the large-diameter portion and has a conveying surface that is continuous with the second small-diameter portion; and a connection portion between the second small-diameter portion and the large-diameter portion is connected to the second small-diameter portion. A cylindrical insertion portion to be inserted into the large-diameter portion with the same diameter as the portion is formed, and a mesh plate curved in an arc shape having a mesh of approximately the same roughness as the sieve mesh is formed of the large-diameter portion. A trommel provided so as to form a continuous conveyance surface by connecting an inner peripheral surface and a communication hole provided in the insertion portion. 8. The sieve mesh provided on the outer periphery of the large diameter portion,
In a case where the projection is divided into a plurality of parts by a frame constituting a large diameter portion, the projection is a projection main body formed of a cylindrical portion having the same diameter as the first small diameter portion, and a radially inward side of the sieve mesh. 8. The trommel according to claim 7, further comprising a slanted conveying surface formed by expanding the protruding portion body outward at a position corresponding to. 9. A feed surface for sending sand to the discharge port side with the rotation thereof is formed on an inner peripheral surface of a part or all of the large diameter portion, the first small diameter portion, and the second small diameter portion. 9. The trommel according to claim 7, wherein a plurality of feed plates are provided. 10. The sand sorter according to claim 1, wherein the trommel according to any one of claims 7 to 9 is used.