JP2003170118A - Schaking equipment for earth and sand and self- propelled soil improving machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide schaking equipment for earth and sand which can efficiently sort even the clay earth and sand of a high water content and a self-propelled soil improving machine equipped therewith. <P>SOLUTION: This schaking equipment has a main body 12A of a frame shape, a screen 13 which is disposed within this main body 12A and sorts the earth and sand received therein according to grain sizes and rotary vanes 52 which are disposed below the screen 13 and disintegrate the earth and sand stagnating on the screen 13. In the rotary vanes 52, at least portions of their trail R of rotation are through the gaps between vertical screen members 13a and 13a of the screen 13. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a soil and sand sieving device for selecting soil and sand according to a particle size, and a self-propelled soil improvement machine equipped with the sieving device.

[0002]

2. Description of the Related Art In recent years, under the background of promoting the reuse of waste, such as enforcement of the so-called recycling law (October 1991),
For example, soil and sand (such as so-called construction soil) as a recycling material generated in burying construction of gas pipes, water and sewer construction, and other road construction and foundation construction, etc. is stirred and mixed with a soil improvement agent to be recycled. Improvement soil is being done. At this time, in order to obtain the improved soil having a uniform grain size within a predetermined range, it is important to select only the soil and sand having a predetermined grain size or less to be used as a recycling raw material.

In recent years, in particular, the properties of earth and sand as a recycle material have been diversified, and in some cases, the earth and sand as a material may contain clay having a high viscosity. In view of the above background, even when such earth and sand is used as a recycled raw material, high quality improved soil (having a grain size within a predetermined range) is always required.

Therefore, in order to deal with this, for example,
A sieving device for earth and sand as described in JP-A-9-11225 has already been proposed. This sieving apparatus for earth and sand is what is called a so-called ribble flow type vibrating screen, and the sieving apparatus main body (screen frame) is provided in a tilted shape and has a substantially frame shape, and the earth and sand received in the screen frame. A grid member (vibrating screen) for selecting the number of particles according to the grain size, and a vibrating means for vibrating the screen frame by transmitting the driving force of an electric motor through a pulley.

In the above-mentioned prior art, the electric motor is rotationally driven in a direction (so-called reverse direction) in which a force that causes the sand to flow from the lower end side in the inclination direction to the upper end side in the inclination direction is applied on the lattice member. As a result, the residence time on the lattice member is increased, and the sieving work can be performed more efficiently than in the case of the normal direction driving.

[0006]

However, the above-mentioned conventional techniques have the following problems. In other words, when the water content of clay, which is highly viscous, becomes particularly large, the water content inside the soil oozes out on the surface due to vibration
As a result, the particles may adhere to each other and grow to form lumps. In such a case, it is difficult to pass through the meshes of the lattice member for sorting even if the lattice member is made to flow from the lower end side to the upper end side to gain residence time as in the above-mentioned conventional technique. Further, when it becomes a lump, it may be rotated by vibration in the vicinity of the upper end portion in the inclination direction of the lattice member to form a cylindrical lump, and in this case, it is also difficult to discharge the lump. In this way, the clod remains or is clogged on the lattice member, and as a result, the area of the portion (actual sieving portion) of the lattice member that can effectively perform the sorting function is reduced, and the sorting efficiency is significantly reduced.

The present invention has been made on the basis of the above-mentioned matters, and an object thereof is a sieving apparatus for earth and sand capable of efficiently selecting even viscous earth and sand having a large water content ratio, and a self-propelled earth quality equipped with the sieving apparatus. It is to provide an improved machine.

[0008]

(1) In order to achieve the above object, a sieving apparatus for earth and sand according to the present invention comprises a sieving apparatus body having a substantially frame shape, and earth and sand received by the sieving apparatus body. And a rotary blade that is provided below the grid member and crushes the earth and sand accumulated on the grid member.

When viscous sand having a large water content is put on the lattice member and the lattice member is vibrated by, for example, a vibrating means for sorting, moisture in the soil exudes to the surface due to the vibration, whereby particles are generated. They adhere to each other and grow to form lumps. In this case, it may be difficult to pass through the sieve mesh of the lattice member, and may stay in the vicinity of the end of the lattice member and rotate due to vibration to form a cylindrical mass. Therefore, in the present invention, a rotary vane is provided below the lattice member, and by crushing the lump of earth and sand that remains on the lattice member, it is possible to prevent the lump of soil from remaining or clogging the lattice member. Therefore, the area of the part (actual sieving part) of the lattice member that can effectively perform the selection function can be increased, and the selection can be performed efficiently.

(2) In the above (1), preferably,
The rotary vanes are arranged such that at least a part of a rotation locus thereof penetrates a gap between the lattices of the lattice member.

(3) In (1) or (2) above, preferably, the lattice member is provided so as to be inclined, and the rotary vanes are provided on the upper end side or the lower end side of the lattice member in the inclination direction. It is provided in at least one of them.

(4) In the above item (3), more preferably, the rotary blade is provided on the upper end side of the lattice member in the inclination direction.

(5) In any one of the above (1) to (4), and preferably, a vibrating means for vibrating the main body of the sieving apparatus is provided.

(6) In order to achieve the above object, the self-propelled soil improvement machine of the present invention comprises a main body frame provided with a traveling means, and a mixing device provided substantially centrally in the longitudinal direction of the main body frame. A hopper provided on one side in the longitudinal direction of the main body frame, a sieving apparatus body oscillatably supported on the upper part of the hopper, a grid member provided on the sieving apparatus body for selecting the received earth and sand according to the particle size, and A sieving device provided below the lattice member and having a rotary blade for crushing the sediment accumulated on the lattice member, and a sieving device provided below the hopper, which conveys the soil received by the hopper to the mixing device. And a carry-out conveyor extending from a lower position of the mixing device to an outer position on the other side in the longitudinal direction of the main body frame.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a sieving apparatus for earth and sand according to the present invention will be described below with reference to the drawings. FIG. 1 is a side view showing the overall structure of a self-propelled soil improvement machine equipped with an embodiment of the earth and sand sieving apparatus of the present invention, and FIG. 2 is a top view thereof. 1 and 2, reference numeral 1 denotes a traveling body, which is a pair of left and right traveling devices 2 and a pair of main body frames 3 extending substantially parallel to the upper portion of the traveling device 2. It consists of and. Further, 4 is a track frame of the traveling device 2, and the track frame 4 is connected to the lower part of the main body frame 3. Reference numerals 5 and 6 are driven wheels (idlers) and drive wheels provided at both ends of the track frame 4, 7 is a crawler belt (a crawler track) wound around the driven wheels 5 and 6 and 8 is a drive wheel 6. It is a drive unit directly connected. A plurality of support posts 9a and 9b are provided upright on the body frame 3, and these support posts 9a and 9b support the support frames 10 and 11.

Reference numeral 12 denotes the earth and sand sieving device of the present embodiment, which selects the earth and sand to be charged according to the particle size. This sieving device 12 is equipped with a screen 13 (see FIG. 2) having a predetermined mesh size inside a sieving device main body 12A having a substantially frame shape, and one side of the main body frame 3 in the longitudinal direction (see FIG. 1).
It is oscillatably supported via a spring 14 on the upper left side. This sieving device 12 is provided with a hydraulic motor 4 for vibration, which will be described later.
Vibration is given by 9 (details will be described later), which removes earth and sand larger than the size of the eyes of the screen 13,
Sediment that is less than the size of the screen 13 is screen 1
It is designed to lead to the lower part of 3.

Reference numeral 15 is a hopper that receives the soil and sand selected by the sieving device 12, and the hopper 15 has a substantially frame-like shape with an upward expansion and is supported so as to be positioned substantially directly below the sieving device 12. It is supported by the post 9a.

Reference numeral 16 denotes a conveyer conveys the earth and sand received by the hopper 15. The conveyer 16 is provided from below the hopper 15 to the inlet cylinder 3 of the mixing device 35 described later.
6 It is extended to the upper part with an upward slope. Reference numeral 16A is a conveyor frame of the transfer conveyor 16, and the conveyor frame 16A is supported by the support posts 9a. 17A and 17B are drive wheels and driven wheels provided at both ends of the conveyor frame 16A, 18 is a conveyor belt wound around the drive wheels 17A and driven wheels 18B, and 19 is a plurality of conveyor belts that support the conveyor surface of the conveyor belt 18. It is a support roller of. A drive device (not shown) is connected to the drive wheel 17A to drive the drive wheel 17A to circulate the conveyor belt 18.

Reference numeral 20 is a soil-quality-improving-material supply device for adding the soil-quality-improving material to the soil on the conveyor 16. The soil quality improving material supply device 20 includes a substantially cylindrical soil quality improving material storage tank 21, and a rotary feeder 22 for guiding the soil quality improving material in the storage tank 21 downward. In addition, the storage tank 21 includes a bottomed cylindrical lower tank portion 23 and a bellows-shaped upper tank portion 24 connected to an upper portion thereof.
And a top plate portion 25 provided so as to cover the upper part thereof.
And is supported on the support frame 11 via a base plate 26. Reference numeral 27 denotes an opening / closing lid of a soil improvement material receiving port (not shown) provided substantially at the center of the top plate portion 25. The opening / closing lid 27 is rotated on the top plate portion 25 via a hinge 28 (see FIG. 2). It is movably mounted.

Reference numeral 29 is a mounting portion provided at a plurality of locations (four locations in the present embodiment) on the outer peripheral portion of the top plate portion 25, and 30 is a column fixedly provided below the mounting portion 29. Pin holes 31 (only the upper one is shown in FIG. 1) are formed at predetermined positions on the upper and lower sides of 30, respectively. Reference numeral 32 is a plurality of guide cylinders standing on the base plate 26.
0 is slidably inserted in the guide tube 32 in the vertical direction so that it can project below the base plate 26.
Reference numeral 33 is a stopper pin for fixing the support column 30 to the guide cylinder 32, and the stopper pin 33 is inserted into the pin hole 31 of the support column 30 via a pin hole (not shown) of the guide cylinder 32.

That is, for example, at the time of operation, the support 30
Is slid upward to extend the bellows-shaped upper tank portion 24, and the stopper pin 33 is inserted into the pin hole 31 below the support column 30 through the pin hole of the guide cylinder 32.
As in the state shown in FIG. 1, a sufficient internal volume of the storage tank 21 is ensured. Further, when the self-propelled soil conditioner is transported by a trailer or the like, the pillar 30 is slid downward to reduce the upper tank portion 24, and the total height of the self-propelled soil conditioner exceeds the transportation limit. It can be held in a lowered state.

Although not shown in the drawings, the rotary feeder 22 has a rotor, which has a plurality of partition walls radially projecting from the rotating shaft, for preventing the congestion, and the soil introduced from the storage tank 21 into the space between the partition walls. The improvement material is led out downward like a water mill and added to the transported earth and sand on the conveyor 16. Further, an unillustrated agitating means in the hopper is provided at a lower portion in the lower tank portion 26, and the soil improving material in the storage tank 21 is smoothly cut out to the rotary feeder 22 by the agitating means in the hopper. It is like this.

Reference numeral 34 designates a crane (see FIG. 2) provided on one side (upper side in FIG. 2) of the self-propelled soil conditioner. It is provided on a support base 35 attached to the body frame 3 on one side (upper side in FIG. 2). This crane 3
4 is a support portion 34A that stands upright from the support base 35,
A base portion is pivotally connected to the support portion 34A, an arm portion 34B that extends and contracts in the longitudinal direction and swivels substantially horizontally, a cylinder portion (not shown) that raises and lowers the arm portion 34B, and a tip portion of the arm portion 34B are provided. And a winch portion 34C. Normally, when filling the soil improvement material into the storage tank 21, the upper opening / closing lid 27 is opened, the flexible container is lifted by the crane 34, and the flexible container is inserted into the soil improvement material receiving port (not shown). There is. At this time, although not particularly shown, a lattice member is supported substantially horizontally just below the soil-improving material receiving port in the storage tank 21, and a cutter whose tip is directed upward is provided on the lattice member. ing. As a result, the flexible container inserted into the soil improvement material receiving port by the crane 34 is pressed against the cutter by its own weight and the bottom portion is torn, and the soil improvement material flows out into the storage tank 21 from here.

Reference numeral 35 is a mixing device for mixing the earth and sand introduced from the conveyor 16 and the soil conditioner to produce improved soil. Although not particularly shown, the mixing device 35 includes a plurality of substantially parallel paddle type mixers (not shown) therein, and the paddle mixers allow the conveyor 16 to be conveyed.
The soil and the soil conditioner introduced from the plant are mixed to produce the improved soil. In addition, this mixing device 35
Is provided substantially horizontally in the vicinity of the center in the longitudinal direction (left-right direction in FIG. 1) of the main body frame 3, and an inlet cylinder 36 of earth and sand and a soil improvement agent is provided on the upper side of one side (left side in FIG. 1) of the other. At the bottom of the side (right side in Fig. 1), an outlet cylinder for improved soil (not shown)
Is equipped with. A driving device 37 drives the paddle mixer.

Reference numeral 38 is a discharge conveyor for discharging the improved soil derived from the mixing device 35 to the outside of the machine. The discharge conveyor 38 is from the lower side of the outlet cylinder (not shown) of the mixing device 35 to the other side (right side in FIG. 1). ), It extends substantially horizontally for a predetermined distance, and then extends upward from the lower part of the driving device 37 of the mixing device 35. 39 is a conveyor frame of the discharge conveyor 38, and the conveyor frame 39 is supported by a supporting member 40 and the like from a power unit 41 (described later), a main body frame 3 and the like. 42 is this discharge conveyor 3
8 is a drive wheel provided at the downstream side (the right side in FIG. 1) in the transport direction, and 43 is a drive wheel 42 and a driven wheel (not shown) provided at the upstream side (the left side in FIG. 1) in the transport direction of the discharge conveyor 38. The rotated conveyor belt 44 is a plurality of support rollers that support the conveyor surface of the conveyor belt 43. Further, 45 is a drive device (see FIG. 2) directly connected to the drive wheel 42, and this drive device 45 rotationally drives the drive wheel 42 to circulate the conveyor belt 43.

The power unit 41 is not particularly shown,
An engine as a power source of the drive device for each device described above, at least one hydraulic pump driven by this engine, and a plurality of controls for controlling the flow of pressure oil supplied from this hydraulic pump to the drive device for each device It is provided with a valve and the like, and is supported at the other end (right side in FIG. 1) in the longitudinal direction of the main body frame 3 via a support member 46. Further, although not shown in the figure for the purpose of preventing complexity, a driver's seat on which an operator rides is provided in a section on the front side (left side in FIG. 1) of the power unit 41. The driver's seat is provided with an operation lever for operating the traveling device 2 and an operation panel for operating other devices.

In the self-propelled soil conditioner having the above-mentioned structure, the most significant feature of the present embodiment is the rotation for crushing the lump of earth and sand retained on the screen 13 in the sieving device 12. The blades are provided. Hereinafter, FIG. 3 is a side view showing the detailed structure of the sieving device 12, FIG. 4 is a front view showing the detailed structure of the sieving device 12, and V in FIG.
This detailed structure will be described with reference to FIG. 5, which is a side sectional view taken along the line -V.

4 in these FIGS. 3, 4 and 5.
Reference numeral 7 denotes side plates 1 which are both side portions in the width direction of the sieving apparatus main body 12A (the direction perpendicular to the paper surface in FIGS. 3 and 5 and the horizontal direction in FIG. 4).
Rotating shafts (see FIG. 5) extending substantially horizontally through the substantially central portions of the rotating shafts 2a and 12a (see FIG. 5), and bearings (not shown) that support both ends of the rotating shaft 47. And a bearing portion fixed to the side plates 12a, 12a with an unbalanced weight (not shown) inside, and 49 is a plate on one side of the bearing portion 48 (front side in the plane of FIG. 3 and right side in FIG. 4). It is a hydraulic motor for vibration fixed via 50.

The unbalanced weight has, for example, a disk shape in which a through hole for inserting the rotary shaft 47 is provided at a position deviated from the center, and inside the bearing portions 48, 48, both ends of the rotary shaft 47 are provided. Further, in the axial direction (perpendicular to the paper surface in FIG. 3, lateral direction in FIG. 4) of the bearing support part,
The rotary shaft 47 is inserted and fixed from both ends. The output shaft (not shown) of the vibration hydraulic motor 49 is connected to the end of one side of the rotary shaft 47 (the front side in FIG. 3 and the right side in FIG. 4). As a result, when the vibration hydraulic motor 49 is rotationally driven, the unbalanced weight is rotationally driven together with the rotary shaft 47 to vibrate the sieving device 12 whose four corners are supported by the springs 14.

Reference numeral 51 indicates the side plate 12 at a position below the screen 13 on the upper end side of the sieving device 12, for example, in the inclination direction.
Fixed shafts having both ends fixed to the inner peripheral surfaces of a and 12a and extending substantially horizontally in the width direction, and 52 are rotary vanes inserted through the fixed shaft 51.

The screen 13 includes a large number of vertical screen members 13a extending in the front-rear direction of the self-propelled soil improvement machine (the left-right direction in FIGS. 3 and 5, and the direction perpendicular to the paper surface in FIG. 4).
These and a large number of horizontal screen members 13b extending in the right angle direction (that is, the width direction) are assembled in a lattice shape. However, as described later, the rotary blade 5
In the area where 2 is inserted and arranged, the arrangement pitch of the horizontal screen members 13b is wider than others so as not to interfere with the rotation locus R (indicated by a broken line in FIG. 5).

The rotary blade 52 has a substantially cylindrical ring portion 52a at the center and a pair of blade portions 52b, 52b projecting in opposite directions from the outer peripheral surface of the ring portion 52a.
It consists of and. The rotary blades 52 are formed by the vertical screen members 13a, 13a adjacent to each other on the screen 13.
The fixed shafts 51 are arranged so as to be inserted one by one into the gaps therebetween, and are arranged so that at least a part of the rotation locus R thereof penetrates the gap between the vertical screen members 13a, 13a. (See FIG. 4). These rotary blades 52 are rotatably supported by the sieving device 12 independently of each other, for example, by the inner peripheral surface of each ring portion 52a slidingly sliding on the outer peripheral surface of the fixed shaft 51. . The blade portion 52b is, for example, a substantially wedge-shaped plate, and has a shape convenient for crushing earth and sand.

In the above, the traveling device 2 constitutes the traveling means described in each of the claims, and the transport conveyor 16
Is a conveying means provided at the lower part of the hopper for conveying the earth and sand received by the hopper to the mixing device.
8 constitutes a carry-out conveyor extending from the lower position of the mixing device to the outer position on the other side in the longitudinal direction of the main body frame.
Further, the screen 13 constitutes a lattice member which is provided in the main body of the sieving device and sorts the received earth and sand according to the particle size,
The vibrating hydraulic motor 49 constitutes a vibrating means for vibrating the sieving apparatus main body.

Next, the operation and action of the self-propelled soil conditioner equipped with one embodiment of the earth and sand sieving apparatus of the present invention having the above structure will be described below. (1) Ordinary earth and sand When the earth and sand to be modified is not cohesive soil or has a normal water content ratio, the vibration hydraulic motor 49 is rotated in the forward direction (arrow A in FIG. 5). . As a result, the sieving device 12 vibrates so that a force that causes the deposited earth and sand to flow on the screen 13 from the upper end side in the inclination direction to the lower end side in the inclination direction is applied. In this state,
When an operator puts sand into the sieving device 12 with a hydraulic excavator or the like, the thrown sand flows on the screen 13 from the upper end side to the lower end side in the inclination direction on the screen 13. As a result, those smaller than the mesh size of the screen 13 fall downward, and the sand larger than the mesh size of the screen 13 cannot pass through the screen 13 and remains on the lattice surface and is discharged from the lower end side of the sieving device 12 in the inclination direction. It

(2) In the case of cohesive soil having a high water content ratio When the soil to be modified is a viscous soil having a relatively high water content ratio, the vibration hydraulic motor 49 is rotated in the reverse direction (direction of arrow A in FIG. 5). Rotate to. Thereby, the sieving device 12
Vibrates so that the force that causes the deposited earth and sand to flow on the screen 13 from the lower end side in the tilt direction to the upper end side in the tilt direction. On the other hand, since the force due to gravity acts on the earth and sand from the upper end side in the inclining direction to the lower end side in the inclining direction due to the above-mentioned inclined structure, the residence time of the introduced earth and sand in this case on the screen 13 The length of time becomes longer, and it is possible to perform the work of selecting soil more efficiently than in the case of the normal rotation drive of the vibration hydraulic motor 49 in the above (1).

However, when the earth and sand put in as described above is viscous earth and sand having a large water content ratio, the water content inside the earth and sand oozes out to the surface due to vibration, whereby earth and sand particles adhere to each other and grow to form a lump. May be. In such a case, even if the sediment is slowly flowed from the upper end side to the lower end side in the inclination direction of the screen 13 to increase the residence time as described above, it is difficult to pass through the eyes of the screen 13 for selection. Becomes Furthermore, since this lump stays on the upper end side of the screen 13 facing the flow direction of the earth and sand, the stayed lump is rotated by vibration and the screen 1
There is a case where a cylindrical mass is formed in the vicinity of the upper end portion of 3, and in this case, it is also difficult to discharge the lump from the lower end side of the sieving device 12.

At this time, each of the rotary blades 52 is individually transmitted, for example, in the direction of arrow c by the vibration applied to the sieving device 12 by the hydraulic motor 49 for vibration being transmitted from the side plate 12a through the fixed shaft 51. Or the pendulum movement in the directions of arrow c and d. The rotary vanes 52 that perform these rotations or pendulum motions are
The lumps of earth and sand that have accumulated in the vicinity of the upper end of the are struck to crush these lumps of sand. As a result, when the crushed earth and sand become smaller than the size of the mesh of the screen 13, they pass through the screen 13 and fall below the sieving device 12.

Even when the crushing blades 52 cannot hit the soil lumps even if they hit the crushing blades 52, the wedge-shaped crushing blades 52 hold the soil lumps, thereby transmitting the vibration of the sieving device 12 to the soil lumps. It can be crushed gradually. Also,
In this way, even when one crushing blade 52 is trapped in the clod, the other crushing blades 52 can move freely without hindering the operation, so that the clod can be efficiently crushed.

In this way, by crushing the clods of soil retained on the screen 13 by the crushing blades 52, it is possible to prevent clods of clods from remaining on or clogging the screen 13. Therefore, the area of the portion (actual sieving portion) of the screen 13 that can effectively perform the sediment selection function can be increased, and the sediment can be efficiently selected.

The earth and sand selected by the sieving device 12 as described in (1) or (2) above is placed on the lower conveyor 16 via the hopper 15 and conveyed. The soil improvement material supply device 20 uses the rotary feeder 22 to transfer the soil improvement material in the storage tank 21 to the conveyor 1.
A certain amount will be supplied to the soil transported in 6. Then, the earth and sand and the soil conditioner introduced into the mixing device 35 by the transport conveyor 16 are uniformly stirred and mixed in the mixing device 35, and are discharged onto the discharge conveyor 38 as improved soil. The improved soil is conveyed by the discharge conveyor 38, and finally discharged outside the self-propelled soil improvement machine.

In the above embodiment of the earth and sand sieving apparatus of the present invention, the crushing blades 52 are rotatably arranged with respect to the fixed shaft 51, and are freely rotated or pendulum according to the vibration of the sieving apparatus 12. I tried to exercise, but it is not limited to this. That is, as shown in FIG.
The driven pulley 53 is provided on the crushing shaft 51 'supported by bearings (not shown) provided on the 2a and 12a, and the drive pulley 54 is also provided on the rotary shaft 47. Belt 55 hung around 53
Transmits the rotational driving force of the rotating shaft 47 to the crushing shaft 51 ',
The crushing blade 52 fixed to the crushing shaft 51 'may be forcibly driven to rotate. In this case, the crushing shaft 51 '
The crushing blade 52 can crush the lump of soil more reliably by the rotational driving force of 1. Therefore, the soil can be more efficiently sorted.

[0042]

According to the present invention, a rotary vane is provided below the lattice member in the main body of the sieving apparatus so as to be able to crush the earth and sand accumulated on the lattice member. It can prevent clogging. Therefore, the actual sieving area of the lattice member can be increased, and the soil can be efficiently selected.

[Brief description of drawings]

FIG. 1 is a side view showing the overall structure of a self-propelled soil improvement machine equipped with an embodiment of the earth and sand sieving apparatus of the present invention.

FIG. 2 is a top view showing the overall structure of a self-propelled soil improvement machine equipped with an embodiment of the earth and sand sieving apparatus of the present invention.

FIG. 3 is a side view showing a detailed structure of an embodiment of the earth and sand sieving apparatus of the present invention.

FIG. 4 is a front view showing a detailed structure of an embodiment of the earth and sand sieving apparatus of the present invention.

5 is a side sectional view taken along the line VV in FIG.

FIG. 6 is a side sectional view showing a detailed structure of a modified example of the embodiment of the earth and sand sieving device of the present invention.

[Explanation of symbols]

2 Traveling device (traveling means) 3 body frame 12 Sieving equipment 12A sieving device body 13 screen (lattice member) 15 hoppers 16 Transport conveyor (transport means) 35 Mixing device 38 Discharge conveyor (carry-out conveyor) 49 Excitation hydraulic motor (excitation means) 52 rotating blades

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) B02C 23/08 B02C 23/08 Z B07B 1/04 B07B 1/04 A 1/28 1/28 Z 1 / 50 1/50 E02D 3/12 102 E02D 3/12 102 E02F 7/00 E02F 7/00 DF Term (reference) 2D040 AB07 CD07 EB04 4D021 AA03 AB04 CA03 CB01 CB18 DA01 DA20 DB11 EA05 4D065 CA05 CB10 CC01 EB03 DD04 4ED0 4 DD08 DD13 DD14 EE02 EE13 EE18 EE19 GA03 GB03

Claims (6)

[Claims] 1. A substantially frame-shaped sieving apparatus main body, a grid member provided in the sieving apparatus main body for selecting the received sand according to the particle size, and provided below the grid member and above the grid member. A sieving device for earth and sand, comprising: a rotary blade that disintegrates the earth and sand that stays in the ground. 2. The sieving apparatus for earth and sand according to claim 1,
The earth and sand sieving device, wherein the rotary vanes are arranged so that at least a part of a rotation trajectory thereof penetrates a gap between the lattices of the lattice member. 3. The earth and sand sieving apparatus according to claim 1 or 2, wherein the lattice member is provided so as to be inclined, and the rotary blade is at least one of an upper end side and a lower end side of the lattice member in the inclination direction. A sieving device for earth and sand characterized by being provided in either one of them. 4. The sieving apparatus for earth and sand according to claim 3,
The said rotary blade is provided in the said inclination direction upper end side of the said lattice member, The sieve apparatus for earth and sand characterized by the above-mentioned. 5. The earth and sand sieving apparatus according to any one of claims 1 to 4, further comprising a vibrating means for vibrating the main body of the sieving apparatus. 6. A main body frame provided with a traveling means, a mixing device provided substantially centrally in the longitudinal direction of the main body frame, a hopper provided on one side in the longitudinal direction of the main body frame, and a vibration on an upper portion of the hopper. Sieving device body supported as possible,
A sieving device provided in the main body of the sieving device, which has a lattice member for selecting the received sediment according to the particle size, and a rotary blade provided below the lattice member and for crushing the sediment retained on the lattice member. And a carrying means provided at a lower part of the hopper for carrying the earth and sand received by the hopper to the mixing device, and a carrying-out extending from a position below the mixing device to an outer position on the other side in the longitudinal direction of the main body frame. A self-propelled soil improvement machine characterized by having a conveyor.