Sieve device and sieve system

Abstract

To provide a sieve device and a sieve system capable of appropriately screening sediments.SOLUTION: A sieve device 40 comprises: screening means including a screen frame 44 supported so as to be able to vibrate by a self-propelled truck 41 and sieves 46 and 48 mounted to the screen frame; and vibration means for vibrating the screening means. The vibration means includes first vibration means 50 for vertically vibrating one first end side of the screening means, and second vibration means 60 for vertically vibrating the other second end side of the screening means. The first vibration means vertically vibrates the screening means more greatly than the second vibration means (V1 and V2).SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a sieving device and a sieving system for sieving soil and sand from grounds, tennis courts, parks, etc. [Background technology]

[0002] When baseball fields, soccer fields, tennis courts, softball fields, parks, etc. (hereinafter collectively referred to as "grounds") are used for a long period of time, the soil becomes hardened due to trampling, wind, rainwater, and dryness.

[0003] For this reason, the ground needs to be regularly maintained. Generally, maintenance involves digging up the surface layer of the ground and leveling it. The excavated soil is sifted through a sieve to remove large stones and lumps, and the sieve soil is then spread on the ground and pressed evenly with a roller or similar.

[0004] Patent Document 1 discloses a self-propelled sieve device in which a mesh sieve is placed on the side wall supported by a number of coil springs on a cart, and the side wall is vibrated up and down by a vibration motor rotated by the driving force of an engine, thereby vibrating the mesh. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2020-146651 A DISCLOSURE OF THEINVENTION [Problem to be solved by the invention]

[0006] However, since the vibration of the sieve mesh is insufficient, the sieve is easily clogged and a large amount of residual soil does not pass through the sieve, reducing the sieve efficiency.

[0007] An object of the present invention is to provide a sieve device and a sieve system that can suitably sift soil and sand. [Means for solving the problem]

[0008] The sieve device according to the present invention comprises: A sieve means having a sieve frame supported on a self-propelled carriage in a vibrating manner and a sieve attached to the sieve frame; a vibration means for vibrating the sieve means; A sieve device having the vibration means includes a first vibration means for vertically vibrating one first end side of the sieve means, and a second vibration means for vertically vibrating the other second end side of the sieve means, The first vibration means vibrates the sieve means up and down to a greater extent than the second vibration means.

[0009] the first vibration means includes a first rotation means, a first rotation shaft rotated by the first rotation means, and a first eccentric cam attached to the first rotation shaft; The eccentric cam may be configured to abut against the sieve frame.

[0010] The sieve means may include a first sieve attached to the sieve frame, and a second sieve disposed below the first sieve and having finer mesh than the first sieve.

[0011] The first sieve and the second sieve may be in the form of a mesh.

[0012] A discharge conveyor for discharging the sieve clay sieved by the sieve means can be disposed below the sieve means.

[0013] The sieve system of the present invention further comprises: The sieve device described above; a hydraulic excavator including a screen bucket connected to an arm, the screen bucket having a plurality of rotary blades arranged in parallel above a discharge outlet formed on the bottom surface of the bucket, the rotary blades being rotated in opposite directions to each other to sieve the scooped up soil and sand and drop it from the discharge outlet; A sieve system comprising: The sieving means of the sieving device is disposed below the screen bucket, and the soil and sand sieved by the screen bucket is sieved again by the sieving device.

[0014] The discharge outlet of the screen bucket can drop the soil toward the second end side of the sieve device. Effect of the Invention

[0015] According to the sieve device of the present invention, the sieve can be moved in a carving-like manner by vibrating the first end up and down more than the second end, thereby preventing the sieve from clogging and reducing the residual soil that does not pass through the sieve, thereby increasing the sieve efficiency. [Brief description of the drawings]

[0016] [Figure 1] FIG. 1 is an explanatory diagram showing a schematic configuration of a sieve system of the present invention. [Diagram 2] FIG. 2 is a plan view of the screen bucket. [Diagram 3] FIG. 3 is a vertical sectional view of the screen bucket. [Figure 4] FIG. 4 is an explanatory diagram showing a schematic configuration of the sieve device. [Diagram 5] FIG. 5 is a plan view of the first sieve. [Figure 6] FIG. 6 is a plan view of the second sieve. [Figure 7] FIG. 7 is an explanatory diagram showing a vibrating state of the sieve means. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] A sieve system 10 according to the present invention will now be described with reference to the drawings.

[0018] Fig. 1 is an explanatory diagram showing a schematic configuration of a sieve system 10 according to one embodiment of the present invention. As shown in Fig. 1, the sieve system 10 can be configured to include a hydraulic excavator 30 equipped with a screen bucket 20, and a sieve device 40 equipped with two types of sieves 46, 48. In the following, the right side in Fig. 1 will be referred to as the front (second end side) and the left side as the rear (first end side), but the orientation of each mechanism is not limited to this embodiment.

[0019] <Hydraulic excavator 30 equipped with screen bucket 20> The hydraulic excavator 30 comprises an upper rotating body 33 arranged on a crawler 31 or wheel-type lower traveling body, and a boom 34 and an arm 35 connected to the upper rotating body 33 so as to be rotatable up and down. The screen bucket 20 is connected to the tip of the arm 35 so as to be rotatable up and down as well. A known configuration can be adopted for the hydraulic excavator 30, and therefore detailed explanation of the configuration and operation will be omitted.

[0020] As shown in Figs. 2 and 3, the screen bucket 20 can be configured to include a bucket 21 attached to an arm 35 (see Fig. 1) and rotary blades 24, 24 housed in the bucket 21. The bucket 21 has teeth 22 at its tip for digging up soil S1 (Fig. 1), and a discharge port 23 at its bottom. The discharge port 23 is equipped with rotary blades 24, 24 formed by axially arranging blades 26 on a rotary shaft 25, 25 suspended between the sides of the bucket 21. The rotary blades 24, 24 can be rotated in opposite directions by the hydraulic pressure of the hydraulic excavator 30. When sieving, the rotary blades 24, 24 rotate as shown by the arrow R in Fig. 3 to push out the soil. When a large stone or the like gets stuck between the rotary blades 24, 24, the rotary blades 24, 24 are rotated in the opposite direction to the arrow R to remove the blockage.

[0021] The blade 26 can be made of metal or resin. For example, the blade 26 can have 8 to 12 blades, a diameter of 150 mm to 300 mm, and a thickness of 20 mm to 50 mm. The rotary blades 24, 24 are arranged at intervals of 0 mm to 50 mm, and by rotating the rotary blades 24, 24 of this embodiment, the maximum diameter of the soil S4 to be sieved can be set to 5 mm to 50 mm. It should be understood that the numerical values, including those in the following description, are examples for understanding the invention and do not limit the present invention.

[0022] <Sieve device 40> The sieving device 40 is a device that re-sieves the soil S2 sieved by the screen bucket 20 into finer soil and carries it out via the conveyors 70, 71. As shown in Fig. 1, the sieving device 40 can be configured to include a cart 41 that is self-propelled by a crawler 42 having a power source such as an engine. The sieving device 40 may be of a type towed by a tractor, and may be configured to receive power from the drive shaft of the tractor to vibrate the sieves 46, 48 and drive the conveyors 70, 71.

[0023] The sieve device 40 of this embodiment is configured such that two types of sieve means (a first sieve 46 and a second sieve 48: see Figs. 4 to 6) with different mesh sizes are arranged vertically on a cart 41 shown in Fig. 1, and a discharge conveyor 70 is arranged below the second sieve 48. The sieves are not limited to a two-tiered configuration as shown in the figure, but may be arranged in one tier or three or more tiers. The first sieve 46 is a sieve for sieving soil S2, and the second sieve 48 is a sieve for sieving soil S3 sieved by the first sieve 46. These sieves 46, 48 are attached vertically within a sieve frame 44 as shown in Fig. 4. The sieve frame 44 is a rectangular frame body whose upper surface and rear side (left side in FIG. 1) are entirely open or at least the rear end sides of the sieves 46, 48 are open, and is attached to the cart 41 via vibration means 50, 60 described below so as to be swingable up and down and / or back and forth. Desirably, in order to prevent the sieve frame 44 from floating up, the sieve frame 44 is biased against the cart 41 by a spring or the like. Soil and sand S2 discharged from the screen bucket 20 is poured into the opening on the upper surface of the sieve frame 44.

[0024] The upper first sieve 46 sieves the soil S2 discharged from the screen bucket 20. The first sieve 46 has a coarser mesh size than the second sieve 48. For example, the first sieve 46 can be a lattice-shaped mesh attached to a sieve frame 44 as shown in FIG. 5. The mesh size is preferably 25 mm×25 mm to 100 mm×100 mm. The first sieve 46 can be swung up and down and / or back and forth together with the sieve frame 44 by the sieve frame 44 being supported by the cart 41 so as to be swingable up and down and / or back and forth.

[0025] 1, the first sieve 46 can be configured to allow the sieved soil S3 to fall downward through the mesh, and allow large residual soil D1 that did not pass through the first sieve 46 to fall from the rear out of the cart 41. Desirably, the first sieve 46 is tilted so that the rear end side (first end side) is lower.

[0026] The lower second sieve 48 is disposed below the first sieve 46 as shown in FIG. 1, and sieves the soil S3 sieved by the first sieve 46. The second sieve 48 is a sieve with finer meshes than the first sieve 46. For example, the second sieve 48 can be a lattice-shaped mesh attached to the sieve frame 44 as shown in FIG. 6. The mesh size is preferably 5 mm×5 mm to 50 mm×50 mm. The second sieve 48 can also be swung up and down and / or back and forth together with the sieve frame 44, as the sieve frame 44 is supported by the cart 41 so as to be swung up and down and / or back and forth.

[0027] 1, the second sieve 48 drops the sieved soil S4 downward. Large residual soil D2 that does not pass through the second sieve 48 can be configured to drop from the rear out of the cart 41, similar to the first sieve 46. Desirably, the second sieve 48 is tilted so that the rear end side (first end side) is lower.

[0028] As shown in FIG. 1, below the second sieve 48, there is an output conveyor 70 onto which soil (sieve soil) S4 that has passed through the second sieve 48 falls and which outputs the sieve soil S4. The output conveyor 70 outputs the soil S4 toward the front (second end side) of the sieving device 40. The output conveyor 70 can be configured by stretching a rotatable belt between rollers, and one of the drive rollers can be configured to be rotated by the hydraulic pressure of the cart 41 or the like. It is preferable that the output conveyor 70 is configured so as not to be affected by the vibrations of the sieving device 40, as shown in FIG. 7.

[0029] The sieve frame 44 is connected to vibration means 50, 60, and is vibrated up and down and / or back and forth by the vibration means. The vibration means can be configured to include a first vibration means 50 driven by a first rotation means 52, and a second vibration means 60 driven by a second rotation means 62. As shown in Figures 1 and 4, the first vibration means 50 is disposed on the rear side (first end side) of the sieve frame 44 from which the residual soil D1, D2 is discharged (left side in the figures), and the second vibration means 60 is disposed on the front side opposite the first end side (second end side: right side in the figures).

[0030] The first vibration means 50 vibrates the rear end side (second end side) of the sieve frame 44 up and down and / or back and forth. The first vibration means 50 can be configured, for example, as shown in FIG. 4, by mounting a first eccentric cam 54 on a first rotation shaft 53 rotated by a first rotation means 52 driven to rotate by hydraulic pressure or the like of the dolly 41, but is not limited thereto. The first rotation shaft 53 extends in the left-right direction of the sieve device 40, and the first eccentric cam 54 abuts against, for example, a frame 45 of the sieve frame 44, and vibrates the sieve frame 44 up and down and / or back and forth by its rotation, as shown in FIGS. 7(a) and (b). The first vibration means 50 is configured to vibrate the sieve frame 44 up and down and / or back and forth more than the second vibration means 60 described next. For example, the amplitude of the vibration of the sieve frame 44 by the first vibration means 50 is larger than that by the second vibration means 60, and can be set to about 50 mm to 250 mm. In this embodiment, the amplitude of the vibration of the sieve frame 44 by the first vibration means 50 can be determined by increasing the eccentricity of the first eccentric cam 54. The illustrated first eccentric cam 54 is an elliptical cam, but may be a circular cam or a cam of another shape.

[0031] The second vibration means 60 vibrates the front end side (second end side) of the sieve frame 44 up and down and / or back and forth. The second vibration means 60 can be configured, for example, as shown in FIG. 4, by mounting a second eccentric cam 64 on a second rotation shaft 63 rotated by a second rotation means 62 driven to rotate by hydraulic pressure or the like of the carriage 41, but is not limited thereto, and a configuration similar to that of the above-mentioned Patent Document 1 can also be adopted. The second rotation shaft 63 extends in the left-right direction of the sieve device 40, and the second eccentric cam 64 abuts against, for example, the frame 45 of the sieve frame 44, and vibrates the sieve frame 44 up and down and / or back and forth by its rotation, as shown in FIGS. 7(a) and (b). The second vibration means 60 is configured to have a smaller amplitude of the sieve frame 44 than the above-mentioned first vibration means 50. For example, the amplitude of the sieve frame 44 by the second vibration means 60 can be about 15 mm to 100 mm. In this embodiment, the amplitude of the vibration of the sieve frame 44 by the second vibration means 60 can be adjusted by making the amount of eccentricity of the second eccentric cam 64 smaller than that of the first eccentric cam 54. Note that the illustrated second eccentric cam 64 is an elliptical cam, but it may be a circular cam or a cam of another shape.

[0032] 7, by making the amplitude of vibration of the sieve frame 44 by the first vibration means 50 larger than the amplitude of vibration of the sieve frame 44 by the second vibration means 60, the first end side, which is the rear side, of the sieve frame 44 is carved out largely. This allows the first sieve 46 and the second sieve 48 to increase the carving efficiency on the rear side, and reduces the amount of residual soil D1, D2 discharged from the rear side.

[0033] As shown in FIG. 1, the front (second end side) of the sieve device 40 has a sending-out conveyor 71 that transports the sieve soil S4 discharged by the discharge conveyor 70 to a desired position and piles it up. The sending-out conveyor 71 and the discharge conveyor 70 are partially overlapped with each other so that the discharge conveyor 70 is on the upper side, and the sieve soil S4 discharged from the discharge conveyor 70 falls as shown by the arrow T1 and is received by the send-out conveyor 71 and transferred (arrow T2). The send-out conveyor 71 is formed by stretching a rotatable belt between rollers, and one of the driving rollers can be rotated by the hydraulic pressure of the dolly 41. The send-out conveyor 71 is a conveyor separate from the discharge conveyor 70 and can be swung left and right and can be swung up and down, so that the sieve soil S4 can be discharged in a desired direction. The discharge conveyor 70 and the send-out conveyor 71 can also be formed from a single conveyor.

[0034] The sieving device 40 also has a surplus soil conveyor 72 at the rear (second end side) to carry out the surplus soil D1, D2 that remains after sieving. The surplus soil conveyor 72 collects the surplus soil D1, D2 that falls from the rear side (first end side) of the first sieve 46 and the second sieve 48, carries it out and piles it up in a desired position or direction (arrow U in FIG. 1 indicates the direction of movement of the surplus soil that is carried out toward the back of the page). A rotatable belt is stretched between the rollers, and one of the drive rollers can be configured to be rotated by the hydraulic pressure of the cart 41 or the like. The surplus soil conveyor 72 is formed to be swingable left and right and swingable up and down, so that the surplus soil D1, D2 can be carried out in a desired direction.

[0035] <Sieving method> A method for sieving soil on a ground using the sieve system 10 of the present invention will be described below with reference to Fig. 1. First, the surface soil of the ground is raked up and piled up into a mountain shape using a bulldozer or the like (S1 in Fig. 1). Next, a hydraulic excavator 30 and a sieving device 40 are moved next to the mountain-shaped pile of soil S1.

[0036] In the sieve device 40, the delivery conveyor 71 and the residual soil conveyor 72 are adjusted to a desired angle and direction. Then, the first vibration means 50 and the second vibration means 60 are driven to vibrate the first sieve 46 and the second sieve 48 together with the sieve frame 44, while the conveyors 70, 71, and 72 are driven to rotate.

[0037] Then, the hydraulic excavator 30 is used to scoop up the soil S1 with the screen bucket 20. In this state, the screen bucket 20 is moved onto the first sieve 46, preferably above the center of the first sieve 46 toward the front side (the second end side), and the rotary blades 24, 24 are rotated (arrow R in FIG. 3). As a result, the soil S1 in the bucket 21 is finely crushed between the rotary blades 24, 24 and falls vigorously from the discharge port 23 onto the first sieve 46 (symbol S2). Note that any residual soil remaining in the screen bucket 20 without being sieved can be thrown out to an appropriate location by rotating the rotary blades 24, 24 in the direction opposite to the arrow R.

[0038] 7, the first sieve 46 and the second sieve 48 are vibrated up and down and / or back and forth by the first vibration means 50 and the second vibration means 60. The first vibration means 50 vibrates the sieves 46, 48 more strongly than the second vibration means 60, so that the vibration (arrow V1) of the rear side (first end side: left side in the figure) of the first sieve 46 and the second sieve 48 is greater than the vibration (arrow V2) of the front side (second end side).

[0039] The soil and sand S2 forcefully discharged from the screen bucket 20 hits the front side of the first sieve 46 with force and is mostly crushed into small pieces. It is also sieved by the vibration of the first sieve 46. The soil and sand S2 sieved by the screen bucket 20 may contain elongated lumps of soil and sand (denoted by the symbol S2') as shown in the circled area A in Fig. 1, but these hit the first sieve 46 with force and can be crushed in part or in whole by the vibrating first sieve 46.

[0040] The first sieve 46 vibrates to sieve the soil S2. The soil S2 that was not sieved at the front side moves to the rear side (first end side) due to the vibration of the first sieve 46. Since the first sieve 46 vibrates the rear side (first end side) more than the front side (second end side), the soil S2 is largely carved at the rear side (first end side), and crushing progresses all at once. As a result, the lumpy soil (for example, S2') is also partially or entirely crushed and becomes small in diameter. Then, the soil S3 that passed through the first sieve 46 falls onto the second sieve 48. On the other hand, the large lumpy soil D1 that did not pass through the first sieve 46 moves further rearward on the first sieve 46, is discharged from the rear as shown in FIG. 1, falls onto the surplus soil conveyor 72, and is carried out (arrow U), and piled up as surplus soil.

[0041] The soil S3 that passes through the first sieve 46 falls onto the second sieve 48 and is further sieved by the second sieve 48. The vibration of the second sieve 48 further breaks up some of the lumpy soil S3 into smaller particles that pass through the second sieve 48. The rear side (first end side) of the second sieve 48 also vibrates strongly, so the soil S3 is carved into large pieces and the crushing progresses. The soil S4 that passes through the second sieve 48 is the sieve soil. The sieve soil S4 falls onto the discharge conveyor 70. Note that the soil D2 that does not pass through the second sieve 48 is discharged from the rear of the second sieve 48 and falls onto the residual soil conveyor 72 to be carried out (arrow U) and piled up as residual soil.

[0042] The sieve soil S4 that has fallen onto the carry-out conveyor 70 is sent forward by the carry-out conveyor 70 and reaches the send-out conveyor 71, where it can be piled up in a mountain shape at a desired position (reference symbol S5).

[0043] The obtained sieve soil S5 is then spread evenly on the ground using a bulldozer or the like, and the maintenance is completed by pressing and leveling it with a roller or the like. The remaining soil D1 and D2 can then be removed.

[0044] According to the sieving system 10 of the present invention and the sieving method using the same, the soil of the ground is scooped on-site and sieved in three stages, so that the sieve soil S4 can be suitably prepared. In particular, the soil S2 sieved by the screen bucket 20 contains slender lumps of soil S2', but by dropping these lumps into the first sieve 46, some of them can be finely crushed, so that the amount of residual soil and the amount of recovery can be reduced. In addition, the first sieve 46 and the second sieve 48 are designed to have one end carved out larger than the other, so that sieving can be performed efficiently, and clogging of the sieves 46, 48 due to large vibration can also be reduced.

[0045] Conventional sieving equipment can sieve approximately 10 to 15 m of soil per hour. 3 The sieve becomes clogged and requires maintenance at regular intervals. However, with the sieve device 40 and sieve system 10 of the present invention, the soil can be sieved at a rate of about 50 to 70 m3 per hour. 3 That's about 480m per day. 3 Therefore, for a typical ground, the sieving process can be completed in about two days.

[0046] The above description of the embodiment is for the purpose of explaining the present invention, and should not be interpreted as limiting the invention described in the claims or narrowing its scope. Furthermore, the components of the present invention are not limited to the above embodiment, and various modifications are possible within the technical scope described in the claims. [Explanation of symbols]

[0047] 10 Sieve System 20 Screen Bucket 21 Bucket 23 Outlet 24 Rotary Blade 40 Sieve device 46 1st sieve 48 Second sieve 50 First vibration means (vibration means) 54 First eccentric cam 60 Second vibration means (vibration means) 64 Second eccentric cam 70 Discharge Conveyor

Claims

1. A sieve means having a sieve frame supported on a self-propelled carriage in a vibrating manner and a sieve attached to the sieve frame; a vibration means for vibrating the sieve means; A sieve device having the vibration means includes a first vibration means for vertically vibrating one first end side of the sieve means, and a second vibration means for vertically vibrating the other second end side of the sieve means, The first vibration means vibrates the sieve means up and down to a greater extent than the second vibration means. Sieve device.

2. the first vibration means includes a first rotation means, a first rotation shaft rotated by the first rotation means, and a first eccentric cam attached to the first rotation shaft; The eccentric cam abuts against the sieve frame.

2. The sieve apparatus of claim 1.

3. The sieve means includes a first sieve attached to the sieve frame, and a second sieve disposed below the first sieve and having a finer mesh than the first sieve.

3. The sieve apparatus of claim 2.

4. The first sieve and the second sieve are mesh-shaped.

4. The sieve apparatus of claim 3.

5. A discharge conveyor for discharging the sieve soil sieved by the sieve means is disposed below the sieve means.

5. The sieve apparatus of claim 4.

6. A sieve device according to any one of claims 1 to 5; a hydraulic excavator including a screen bucket connected to an arm, the screen bucket having a plurality of rotary blades arranged in parallel above a discharge outlet formed on the bottom surface of the bucket, the rotary blades being rotated in opposite directions to each other to sieve the scooped up soil and sand and drop it from the discharge outlet; 1. A sieve system comprising: The sieve means of the sieve device is disposed below the screen bucket, and the soil and sand sieved by the screen bucket is sieved again by the sieve device. Sieve system.

7. The discharge port of the screen bucket drops the soil toward the second end side of the sieve device. The sieve system of claim 6.

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