JP2003105800A - Self-running soil improvement machine and bridge preventing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a self-running soil improvement machine capable of smoothly carrying the sediment in a hopper to the outside of the hopper to secure the stable supply quantity of sediment, and a bridge preventing device for use in it. SOLUTION: In this self-running soil improvement machine, the received sediment to be modified is mixed with a soil modifier material to be modified. This machine includes a hopper 12 for receiving the sediment to be modified, a carrying conveyer 13 for carrying the sediment to be modified received by the hopper 12, a movable wall 12A constituting the wall surface in the downstream in the sediment carrying direction by the carrying conveyer 13 of the hopper 12, and a driving device 25 for driving the movable wall 12A.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a self-propelled soil conditioner that receives soil, mixes it with a soil conditioner and reforms it, and a cross-linking prevention device used therefor.

[0002]

2. Description of the Related Art In recent years, under the background of promoting waste reuse such as the establishment of a so-called construction recycling promotion plan by the Ministry of Construction (1997), for example, burial work for gas pipes, water and sewer work, and other road works. -At various sites where foundation work etc. are performed, the soil and sand are mixed with the soil improvement material by stirring and mixing, and improved soil products for recycling and improved soil for laying ground on the surface layer of residential land, road subgrades, etc. Needs for self-propelled soil improvement machines to generate are expanding. As such a self-propelled soil improvement machine, for example, Japanese Patent Laid-Open No. 2000-2000
As described in JP-A-45263, a hopper that receives earth and sand (earth and sand hopper), a conveyer that conveys earth and sand in the hopper (intake conveyor), and a soil property that adds a soil improvement agent to the earth and sand on the conveyer conveyor. An improvement material supply device (soil quality improvement material hopper), a mixing device (treatment tank) that mixes the soil and sand and the soil quality improvement material introduced from the conveyor to generate improved soil, and the improved soil derived from this mixing device. A device provided with a discharge conveyor (carry-out conveyor) for discharging outside has already been proposed.

In this prior art, the hopper is formed in a substantially frame-like shape of which the upper and lower sides are opened and which is widened upward.
For example, it plays the role of receiving the earth and sand thrown in by a heavy loader such as a hydraulic excavator and guiding it to the transport conveyor below it. In addition, a gate having a predetermined area (width and height) is formed on the wall surface of the hopper on the downstream side in the transport direction by the transport conveyor, and the gate having a predetermined area (width and height) is formed at the end opposite to the transport conveyor, and is discharged from the hopper by the transport conveyor. The earth and sand are cut out with a predetermined cross-sectional area (width and height) when passing through this gate. In the above-mentioned conventional technique, the earth and sand are continuously cut out from the hopper with a predetermined cross-sectional area in this manner.

[0004]

Here, the earth and sand received in the hopper is conveyed to the wall surface side of the hopper provided with the gate by the conveyor as described above. At this time, the earth and sand that does not pass through the gate is pressed against the wall surface of the hopper provided with the gate, and further receives the pressing force from the earth and sand conveyed later. in this case,
Although it depends on the properties of the soil to be modified, for example, when clay that has a very small particle size and high viscosity is targeted for modification, the soil that is pressed against the wall surface of the hopper provided with the gate as described above will It may be further pressed against the wall surface by the earth and sand transported from it, where it may be compacted and strongly solidified. As a result, the amount of earth and sand cut out to the outside of the hopper decreases, a so-called bridge phenomenon may occur in the hopper in some cases, and the earth and sand may not be carried out to the outside of the hopper at all.

The present invention has been made based on the above matters, and an object thereof is a self-propelled type capable of smoothly transporting the earth and sand in the hopper to the outside of the hopper and securing a stable earth and sand supply amount. An object of the present invention is to provide a soil improvement machine and a cross-linking prevention device used therefor.

[0006]

[Means for Solving the Problems] (1) In order to achieve the above object, the present invention is a self-propelled soil improvement machine that mixes the received soil with a soil improvement agent to modify the soil. It is configured to include a hopper, a conveyor that conveys the earth and sand received by the hopper, a movable wall that constitutes a downstream side wall surface of the hopper in the earth and sand conveyance direction by the conveyor, and a drive device that drives the movable wall. .

In the present invention, the downstream side wall surface of the conveyor in the hopper in the earth and sand conveying direction is movable.
That is, for example, even when a clay soil or the like is to be modified, the earth and sand in the hopper can be loosened by the movement of the downstream side wall surface which is pressed by the conveyor. As a result, it is possible to prevent the soil and sand from being compacted and strongly compacted in the hopper. Therefore, the occurrence of the bridging phenomenon in the hopper can be prevented, so that the earth and sand can be smoothly transported to the outside of the hopper, and a stable earth and sand supply amount can be secured.

(2) In the above item (1), preferably,
The movable wall is configured to make a circular motion.

(3) In above (1), and preferably, the movable wall is configured to swing.

(4) Any one of (1) to (3) above
In the above, preferably, a plurality of rod-shaped members are arranged in a row below the movable wall.

As a result, the earth and sand conveyed by the conveyor can be scraped and disentangled by a plurality of rod-shaped members, so that the soil and sand can be prevented from being compacted more effectively.
Further, when a large foreign substance or the like is mixed in the soil to be modified, the foreign substance is blocked by a rod-shaped member to prevent the foreign substance from being carried out of the hopper. It is possible to prevent in advance a defect such as a foreign substance being caught in the device. Further, since the foreign matter can be removed from the soil to be modified, it is possible to generate improved soil having a smaller amount of the foreign matter mixed therein.

(5) In order to achieve the above-mentioned object, the present invention is a self-propelled soil improving machine for mixing the received soil with a soil improving agent to modify the hopper and the hopper for receiving the soil. The transport conveyor for transporting the earth and sand received in 1., and the disassembling means for loosening the earth and sand on the downstream side in the earth and sand transportation direction by the conveyor in the hopper.

(6) In order to achieve the above object, the present invention further comprises: a movable wall which constitutes a downstream side wall surface of a hopper for receiving earth and sand in a earth and sand conveying direction by a conveyor, and a drive device which drives the movable wall. Is provided.

(7) In the above (6), preferably,
The movable wall is configured to make a circular motion.

(8) In the above (6), and preferably, the movable wall is configured to swing.

(9) Any one of (6) to (8) above
In the above, preferably, a plurality of rod-shaped members are arranged in a row below the movable wall.

(10) In order to achieve the above-mentioned object, the present invention is also provided with a loosening means for loosening the earth and sand received by the hopper and conveyed by the conveyor.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a self-propelled soil improvement machine of the present invention will be described below with reference to the drawings. Self-propelled soil improvement machine, for example, construction generated soil improvement such as construction generated soil generated at a construction site, etc. is mixed with a soil improvement material on site to produce an improved soil product for recycling,
Alternatively, the soil that has been excavated from the surface of a site for construction of residential land, etc. can be modified on the spot to generate improved soil that can be backfilled to the surface for strengthening the ground, or excavation of a specified location within the site at a site for road construction, etc. It is widely used for surface soil stabilization treatment, such as modifying the soil obtained in this way on-site to generate improved soil to be laid as a roadbed material.

FIG. 1 is a side view showing the overall structure of an embodiment of a self-propelled soil improvement machine of the present invention, FIG. 2 is a top view thereof, and FIG. 3 is a front view seen from the left side in FIG. 1 to 3, reference numeral 1 denotes a traveling body, and this traveling body 1 is a left / right 1
It is composed of a pair of traveling devices 2 and a pair of main body frames 3 extending substantially parallel to the upper portion of the traveling device 2. 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, and 7 is a crawler belt (infinite track track) wound around the driven wheels 5 and the drive wheels 6,
Reference numeral 8 is a drive device directly connected to the drive wheels 6. 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 a hopper (details will be described later) that receives the soil to be modified, and the hopper 12 is formed in a substantially frame shape having upper and lower openings. One side (left side in Fig. 1)
Supported by. Further, the earth and sand to be modified are often thrown in by heavy equipment such as a hydraulic excavator, and the hopper 12 is opened upward in consideration of the convenience of throwing in the sand by a heavy equipment such as a hydraulic excavator. Has been formed.

Reference numeral 13 denotes a conveyor for conveying the earth and sand received by the hopper 12. The conveyor 13 is provided below the hopper 12 and has an inlet cylinder 49 of a mixing device 47 which will be described later.
(See FIG. 7, which will be described later) It extends upwardly upward. Reference numeral 14 denotes a conveyor frame of the transfer conveyor 13, and the conveyor frame 14 has the support post 9
It is supported by a, 9b and the like. Reference numerals 15 and 16 denote drive wheels and driven wheels provided at both ends of the conveyor frame 14, 17 denotes a conveyor belt wound around the drive wheels 15 and the driven wheels 16, and 18 denotes a plurality of conveyor belts that support the conveyor surface of the conveyor belt 17. It is a support roller of. A drive device (not shown) that drives the drive wheel 15 to circulate the conveyor belt 17 is connected to the drive wheel 15.

FIG. 4 is a side sectional view schematically showing the structure of the hopper 12, and FIG. 5 is a sectional view taken along the line VV in FIG. In FIGS. 4 and 5, reference numeral 12A is a movable wall forming a wall surface on the downstream side (the right side in FIG. 4) in the earth and sand conveyance direction by the conveyor 13 of the hopper 12. This movable wall 1
2A is separated from the conveyor belt 17 of the conveyor 13 by a predetermined distance, and a gap corresponding to the width of the movable wall 12A existing between the movable wall 12A and the conveyor belt 17 is the earth and sand of the hopper 12. It opens as an outlet 12B. That is, the earth and sand in the hopper 12 is transferred to the conveyor 13
By this, the soil and sand outlet 12B is cut out at the width and height.

Reference numeral 19 is a bracket fixed to the outer wall of the movable wall 12A, and 20 is an eccentric shaft inserted into the bracket 19. The eccentric shaft 20 has, for example, the support shaft 10 (see FIG. 1) with the rotation center shaft 20A protruding from both ends.
A peripheral body portion 20B, which is rotatably supported by a frame (not shown) provided above and is eccentric with respect to the rotation center shaft 20A, is rotatably inserted into the bracket 19. 21A is a bracket fixed to the outer wall of the movable wall 12A at a position higher than the bracket 19;
Is a bracket fixed to a frame 22 provided above the support frame 10, 23 is a bracket 21A,
21B is an arm interposed between both ends of this arm 23.
It is rotatably connected to the brackets 21A and 21B via pins 24 and 24. That is, the movable wall 12A forming the downstream side wall surface of the hopper 12 is supported by a frame (not shown) provided above the support frame 10 independently of the hopper 12 and the frame 22.

Further, 25 is the support frame 10 (see FIG. 1).
The driving device 25 (see FIG. 5) provided above the driving device 25 is directly connected to the rotation center shaft 20A on one end side (left side in FIG. 5) of the eccentric shaft 20. That is, when the drive device 25 is driven, the movable wall 1 of the support structure is
As shown by the arrow in FIG. 4, 2A orbits (vibrates) in a substantially elliptical locus such that the lower end thereof is pushed up inside the hopper 12. As a result, the movable wall 12A is moved to the transport conveyor 13 inside the hopper 12.
The earth and sand on the downstream side in the earth and sand conveyance direction (that is, the earth and sand on the right side in FIG. 4, in other words, the earth and sand in the vicinity of the movable wall 12A) is exerted to loosen by applying an upward force to the inside of the hopper 12.

Although the movable wall 12A oscillates in a clockwise locus in the drawing in FIG. 4, it is assumed that the drive device 25 is oscillated in a counterclockwise locus by reversing the direction of rotation. It doesn't matter. Further, the support mechanism of the movable wall 12A described above is the cover 26 (see FIG. 1).
Protected by.

Returning to FIG. 1 to FIG. 3, 27 is a soil-improving material supply device for adding the soil-improving material to the earth and sand on the conveyor 13. This soil-improving material supply device 27 has a substantially rectangular horizontal cross section. Storage tank 28 for improving material, screw feeder 29 for leading out the soil improvement material in this storage tank 28, and substantially quadrangular pyramid shape that plays a role of a funnel for guiding the soil improvement material in storage tank 28 to the screw feeder 29. And a shoot 30 of Also, the storage tank 2
Reference numeral 8 is composed of a bellows portion 32, which is connected to a flange-shaped frame plate 31 above the chute 30, and a top plate portion 33 which covers the top of the bellows portion 32. Reference numeral 34 designates an inlet (see FIG. 2) for filling the soil-improving material, which is provided substantially in the center of the top plate 33, and 35 is an opening / closing lid of the soil-improving material inlet 34. It is attached to 33 by a hinge 36 (see FIG. 2).

Reference numeral 37 denotes a plurality of (three in this example) mounting portions provided on the outer peripheral portion of the top plate portion 33, and 38 denotes columns fixedly provided below the mounting portions 37. Has a pin hole 39 (only the upper one is shown in FIGS. 1 and 3) at a predetermined position. 40 is a substantially frame-shaped base plate supported by the support frame 11, 41 is a plurality of guide cylinders standing on the base plate 40, and the guide cylinders 41 support the frame plate 31 of the chute 30 described above. is doing. That is, the columns 38 are slidably inserted in the guide cylinders 41 in the vertical direction to form the base plate 40.
Of the storage tank 28, and the bellows portion 32 expands and contracts in accordance with the slide of the support column 38 so that the height of the storage tank 28 is variable. Also,
A pin hole (not shown) is formed near the tip of the guide cylinder 41.

Reference numeral 42 is a stopper pin for fixing the support column 38 to the guide cylinder 41, and the stopper pin 42 is the guide cylinder 4
It is to be inserted into the pin hole 39 of the support column 38 via the pin hole (not shown) of FIG. That is, for example, at the time of operation or the like, the bellows portion 32 is extended, and the stopper pin 42 is inserted into the pin hole 39 on the lower side of the support column 38 through the pin hole of the guide cylinder 41 to obtain the state shown in FIG. The storage tank 28
When the self-propelled soil improvement machine is transported by a trailer, etc., the bellows portion 32 is contracted and the pin hole 39 on the upper side of the support column 38 is inserted through the pin hole of the guide cylinder 41. By inserting the stopper pin 42, the total height of the self-propelled soil improvement machine can be maintained in a state of being lowered to a height that clears the transportation restriction.

Reference numeral 43 denotes a casing of the screw feeder 29. The casing 43 is formed in a substantially cylindrical shape and has a screw 44 inside. The screw 44 is rotationally driven by a drive device (not shown), and the screw feeder 29 transfers the soil improvement material introduced into the casing 43 from the chute 30 to the left side in FIG. The earth and sand transported near the end of the downstream side (the right side in FIG. 1) of the conveyor 13 in the transport direction from the outlet of the soil improvement material (not shown) provided on the lower side of one side (the left side in FIG. 1) in the longitudinal direction of the casing 43. In addition, soil improvement materials are added in fixed quantities. Note that FIG.
As shown in FIG. 1, the screw feeder 29 is arranged so that the upstream side (the right side in FIG. 1) in the transfer direction enters the lower space.
It is arranged so as to be lower with respect to the downstream side (the left side in FIG. 1) in the transfer direction, and the height of the soil improvement material supply device 27 is taken into consideration correspondingly.

Reference numeral 45 denotes a crane (see FIGS. 2 and 3) provided on one side (upper side in FIG. 2) of the self-propelled soil conditioner. This crane 45 is one side (in the width direction) of the self-propelled soil conditioner. It is provided on a support base 46 attached to the main body frame 3 (on the left side in FIG. 3). In addition, the crane 45 is mounted on the support base 4
6, a support portion 45A that is provided upright from above, and this support portion 45A.
The arm 45B has a base end pivotally connected to A, expands and contracts in the longitudinal direction, and swings substantially horizontally, a cylinder 45C for raising and lowering the arm 45B, and a winch 45D provided at the tip of the arm 45B. Normally, when the soil improvement material is filled in the storage tank 28, the upper opening / closing lid 3
5 is opened and the flexible container is lifted by this crane 45 and inserted into the soil improvement material receiving port 34.

At this time, although not particularly shown in order to prevent complication, the top plate portion 33 is provided with a cutter whose tip is directed upward so as to be positioned substantially directly below the soil improvement material receiving port 34 in the storage tank 28. It is provided. This allows the crane 45
The flexible container inserted into the soil quality improving material receiving port 34 by the above is pressed against the cutter by its own weight, the bottom portion is cut, and the soil quality improving material flows out into the storage tank 28 from here.

Reference numeral 47 is a mixing device for mixing the earth and sand introduced from the conveyer 13 and the soil conditioner to produce improved soil. 6 is a horizontal sectional view showing the detailed structure of the mixing device 47, and FIG. 7 is a side sectional view taken along the line VII-VII in FIG. 6 and 7, reference numeral 48 is a substantially box-shaped main body of the mixing device 47, and the mixing device main body 48 is
An inlet cylinder 49 for earth and sand and a soil-improving material is provided on the upper side on one side (left side in FIG. 7) in the longitudinal direction, and an outlet cylinder 50 for improved soil is provided on the lower side on the other side (right side in FIG. 7). 48A is a lid that constitutes the upper surface of the mixing device body 48 excluding the inlet cylinder 49, and a plurality of lids 48A (three in this example) together with the inlet cylinder 49 on the mixing device body 48. They are installed side by side and bolted together. That is, by removing the lid 48A and the inlet tube 49, the upper surface of the mixer main body 48 can be entirely opened.
However, the lid 48A may have a single-sheet structure.

Reference numeral 51 denotes a plurality (two in this example) of paddle mixers provided in the mixer main body 48. The paddle mixers 51 are arranged substantially parallel to the longitudinal direction of the mixer main body 48 (left-right direction in FIG. 6). The rotary shaft 52 is hollow (may be solid), and a plurality of paddles 53 are radially provided on the rotary shaft 52. The paddle 53 has a smooth surface inclined by a predetermined angle with respect to the axial direction of the rotary shaft 52 (in this case, the right direction in FIG. 6) so as to face the rotational direction of the paddle mixer 51.

Reference numeral 54 denotes a bearing that rotatably supports both ends of the rotary shaft 52 of the paddle mixer 51, 55 denotes a gear provided at the other end (right end in FIG. 6) of the rotary shaft 52, and 56 denotes a drive device of the paddle mixer 51. Output shaft 56a of this drive device 56
Is directly connected to the other end (right end in FIG. 6) of the rotary shaft 52.
Further, the gears 55 of the adjacent rotary shafts 52 are meshed with each other so that the adjacent paddle mixers 51 are rotationally driven in the opposite directions at substantially the same rotational speed.

With such a structure, the mixing device 47 is
The earth and sand and the soil conditioner introduced from the conveyer 13 through the inlet cylinder 49 are mixed by the paddle mixer 51 (strictly speaking, the paddle 53) to form improved soil, which is then transferred to the opposite side and downward from the outlet cylinder 50. It is supposed to be derived. In addition, 57 is a gear box including the gear 55,
Reference numeral 58 denotes a scraping blade that scrapes the generated improved soil toward the outlet cylinder 50 to prevent the improved soil from being compacted on the inner wall of the mixing device body 48 on the outlet cylinder 50 side.

Returning to FIG. 1 to FIG. 3, 59 is the mixing device 4.
7 is a discharge conveyor that discharges the improved soil extracted from the outside of the machine. The discharge conveyor 59 extends from below the outlet cylinder 50 (see FIG. 7) of the mixing device 47 to the outside (in this case, the right side in FIG. 1). After extending substantially horizontally for a predetermined distance, it extends upward from the lower part of the driving device 56 of the mixing device 47.

Reference numeral 60 is a conveyor frame of the discharge conveyor 59, and the conveyor frame 60 is the support member 6
It is supported by the power unit 68, the main body frame 3 and the like, which will be described later, through the components 1, 62 and the like. 63 is this discharge conveyor 59
Drive wheels provided at the downstream (right side in FIG. 1) end in the transport direction of
64 is a conveyor belt, and the conveyor belt 64 is a drive wheel 6
3 and the driven conveyor (not shown) provided on the upstream side (left side in FIG. 1) in the transport direction of the discharge conveyor 59. 65
Is a plurality of support rollers for supporting the conveying surface of the conveyor belt 64, and 66 is a drive device (see FIG. 2) directly connected to the drive wheel 63. The drive device 66 rotationally drives the drive wheel 63 to convey the conveyor belt 64. It is designed to be driven in circulation. In addition, 67 is a side cover of the discharge conveyor 59,
The side covers 67 are provided on both upper sides of the conveyor frame 60 in the width direction (vertical direction in FIG. 2).

Reference numeral 68 denotes the power unit mentioned above. The power unit 68 is supported by the other end (right side in FIG. 1) in the longitudinal direction of the main body frame 3 via a support member 69. The power unit 68 is not particularly shown in order to prevent complication, but at least one hydraulic pump that discharges pressure oil to be supplied to the drive unit of each device described above, an engine that drives this hydraulic pump, and a hydraulic pressure. A plurality of control valves for controlling the direction and flow rate (or only direction) of the pressure oil supplied from the pump to each drive device are provided inside.

Reference numeral 70 denotes a driver's seat provided in a section on the front side (left side in FIG. 1) of the power unit 68.
A pair of operation levers 71 for operating the drive device of the traveling device 2 and an operation panel 72 (see FIG. 2) for operating the drive devices of other devices such as the drive device 56 of the mixing device 47 are provided. There is.

Next, the operation and action of the self-propelled soil improvement machine of the present embodiment having the above structure will be described. For example, when the earth and sand to be modified is put into the hopper 12 by a hydraulic excavator or the like, the earth and sand received by the hopper 12 is placed on the conveyor 13 below and conveyed. The soil quality improving material supply device 27 supplies the soil quality improving material in the storage tank 28 to the earth and sand conveyed by the conveyor 13 by the screw feeder 29 in constant amounts. Then, the earth and sand and the soil conditioner introduced into the mixing device 47 by the conveyer 13 are uniformly stirred and mixed by the paddle mixer 51,
It is led out as improved soil on the discharge conveyor 59. The improved soil is conveyed by the discharge conveyor 59 and finally discharged outside the self-propelled soil improvement machine.

Here, in FIGS. 4 and 5, the earth and sand put into the hopper 12 is conveyed toward the earth and sand outlet 12B of the hopper 12 by the conveyor 13. At this time, the sediment that does not pass through the sediment outlet 12B is removed from the movable wall 1
It will be pressed against 2A and will receive the pressing force from the earth and sand transported later. In this case, depending on the property of the sand to be modified, if, for example, a clay having a very small particle size and a high viscosity is targeted for the modification, the sand pressed against the movable wall 12A by the above-mentioned procedure is There is a possibility that the sand and sand conveyed from the hopper 12 further presses it against the movable wall 12A, consolidating it in the hopper 12 and strongly tightening it. As a result, the amount of earth and sand cut out to the outside of the hopper 12 may decrease, and in some cases a so-called bridge phenomenon may occur in the hopper 12, and the earth and sand may not be carried out to the outside of the hopper 12 at all.

However, as described above, in the present embodiment, the movable wall 12A has a structure capable of revolving movement (vibration). As indicated by the arrow, the sediment outlet 12
Since the movable wall 12A orbits so as to mainly apply an upward force to the sediment near the B, the sediment pushed against the movable wall 12A can be loosened. As a result, it is possible to prevent the soil and sand from being compacted and strongly compacted in the hopper 12. Therefore, it is possible to prevent the occurrence of the crosslinking phenomenon in the hopper 12,
The earth and sand can be smoothly transported to the outside of the hopper 12, and as a result, a stable earth and sand supply amount can be secured.

When the lower end of the movable wall 12A is rotated around the lower end of the movable wall 12A in a direction opposite to the arrow in FIG. 4, the lower end of the movable wall 12A moves the earth and sand out of the hopper 12. Since the action of scraping is added, it is possible to further improve the transportability of the earth and sand to the outside of the hopper 12, depending on the nature of the earth and sand. Needless to say, the movable wall 12A can be used as the downstream side wall surface of the hopper 12, which is stopped and simply fixed, without necessarily operating the movable wall 12A. Therefore, when it is not necessary to orbit the movable wall 12A depending on the nature of the earth and sand, or when it is inconvenient to orbit, it can be used as a normal fixed hopper.

FIG. 8 is a cross-sectional view schematically showing the structure of a hopper provided in a modified example of the self-propelled soil improvement machine of the above embodiment, and is a view corresponding to FIG. 5 described above. However, the same parts as those in the previous figures are designated by the same reference numerals and the description thereof will be omitted. In FIG. 8, 73 is a plurality of rod-shaped members provided on the lower part of the movable wall 12A (that is, the end of the conveyor 13 facing the conveyor belt 17), and these rod-shaped members 73 are respectively conveyed to the lower end of the movable wall 12A. The belt 17 is fixed vertically with a predetermined gap (a gap to the extent that the lower end of the rod-shaped member 73 does not interfere with the conveyor belt 17 during the circular movement of the movable wall 12A), and is fixed vertically. 8 in the left-right direction) are arranged in a comb-like shape at predetermined intervals. The present modification has the same configuration as that of the above-described embodiment except that the rod-shaped member 73 is provided.

Also in this modification, the same effect is obtained, and since the rod-shaped member 73 makes an orbital movement integrally with the movable wall 12A, it is transported through the earth and sand in the vicinity of the earth and sand outlet 12B or the earth and sand outlet 12B. Since it is possible to crush the earth and sand to plow it, it is possible to more effectively prevent the earth and sand from being consolidated. Further, when a large foreign matter or the like is mixed in the soil to be modified, the foreign matter is blocked by the rod-shaped member 73 to prevent the foreign matter from being carried out of the hopper 12. It is possible to prevent in advance such a problem that the foreign matter is introduced into the inside and causes the inside to be caught. Furthermore, since it is possible to prevent foreign matter from being mixed into the mixing device 47 in advance, it is possible to generate improved soil having a high quality with less foreign matter.

In this modification, the shape of the rod-shaped member 73 may be changed according to the nature of the earth and sand, for example, an arc shape. Also, the cross section may be changed to a shape suitable for the property of the earth and sand, such as a square, a circle, an ellipse, and a streamline. The point is that the shape is such that the soil can be cultivated without hindering the transportation. In addition, the rod-shaped member 73
Although it is described that the rods are fixed to the movable wall 12A, the present invention is not limited to this and may be configured to be attachable to and detachable from the movable wall 12A, and the rod-shaped members 73 are independent of each other. The shape may be connected. In this way, when the rod-shaped member 73 is integrally configured and can be attached to and detached from the movable wall 12A, when exchanging with another shape according to the property of the earth and sand or when exchanging due to wear, exchange work It improves the sex.

Next, another embodiment of the self-propelled soil improvement machine of the present invention will be described. FIG. 9 is a side sectional view schematically showing the structure of a hopper provided in the self-propelled soil improvement machine of the present embodiment, and is a view corresponding to FIG. 4 described above. However, the same parts as those in the previous figures are designated by the same reference numerals and the description thereof will be omitted. This Figure 9
In the figure, 74 is a hydraulic cylinder (which may be an electric cylinder), and both ends thereof are attached to brackets 76A and 76B fixed to a frame 75 provided on the outer wall lower side of the movable wall 12A and above the support frame 10 (see FIG. 1). On the other hand, they are rotatably connected via pins 77, 77. Further, 78 is a bracket fixed to the upper side of the outer wall of the movable wall 12A, 79 is a bracket fixed to a frame 80 provided above the support frame 10 (see FIG. 1), and these brackets 78 and 79 are connected via a pin 81. They are rotatably connected to each other. Other configurations are the same as those in the above-described one embodiment.

That is, in the present embodiment, the hydraulic cylinder 74 is appropriately or repeatedly expanded and contracted so that the lower end of the movable wall 12A can be seen in FIG.
It can be swung in the direction of the arrow inside. As a result, also in this embodiment, the movable wall 1
An upward force is mainly applied to the earth and sand pressed against the 2A so that the earth and sand can be untied, so that the earth and sand can be prevented from being compacted in the hopper 12 and strongly compacted. Therefore, the occurrence of the bridging phenomenon in the hopper 12 can be prevented, so that the earth and sand can be smoothly transported to the outside of the hopper 12, and as a result, a stable earth and sand supply amount can be secured.

Next, still another embodiment of the self-propelled soil improvement machine of the present invention will be described. FIG. 10 is a side sectional view schematically showing the structure of a hopper provided in the self-propelled soil improvement machine of the present embodiment, and is a view corresponding to FIG. 4 described above. However, the same parts as those in the previous figures are designated by the same reference numerals and the description thereof will be omitted.
In FIG. 10, 82 is an arm fixed to the outer wall of the movable wall 12A, and 83 and 84 are both supporting frames 10 (see FIG.
(See) The frame provided above. 85, 85 are brackets fixed to the lower part of the frame 83 at a predetermined interval,
86 and 86 are brackets 85 and 8 above the arm 82.
It is a bracket fixed at approximately the same interval as 5. 87,8
7 are arms having substantially the same size, and these arms 87,
Both ends of 87 are rotatably connected to the brackets 85 and 86 via pins 88 and 88, respectively.
89 is a hydraulic cylinder (it may be an electric cylinder),
Both ends of the hydraulic cylinder 89 are rotatably connected to the end of the arm 82 (the right end in FIG. 10) and a bracket 90 fixed to the frame 84 via pins 91, 91.

That is, in the present embodiment, the movable wall 1
2A is supported by a parallel link structure, and by appropriately or repeatedly expanding and contracting the hydraulic cylinder 89,
With the frame 83 as a base point, the structure is such that the frame 83 can be entirely swung in the direction indicated by the arrow in FIG. Therefore, also in the present embodiment, it is possible to obtain the same effect as that of the above-described embodiment of FIG. 9 and also to swing the movable wall 12A as a whole, and thus, compared with the above-described embodiment, It can effectively loosen earth and sand.

In both of the embodiments shown in FIGS. 9 and 10, the hydraulic cylinders 74 and 89 are used as the drive device for the movable wall 12A. However, for example, a crank mechanism is used to convert rotary motion into reciprocating motion. It may be configured to convert. Needless to say, the rod-shaped member 73 described in the modification of FIG. 8 can be applied to both the embodiments of FIGS. 9 and 10. Also in these cases, the same effect as the modification of FIG. 8 can be obtained.

Here, in each of the embodiments and modifications of the present invention described above, for example, a self-propelled soil improvement machine equipped with a sieve device or a soil improvement material supply device equipped with a so-called rotary feeder is installed. It can also be applied to self-propelled soil improvement machines. The self-propelled soil improvement machine having such a configuration will be described below.

FIG. 11 is a side view showing the entire structure of a self-propelled soil improvement machine equipped with a sieve device and a soil improvement material supply device equipped with a rotary feeder, and FIG. 12 is a top view thereof. However, in these FIG. 11 and FIG. 12, the same reference numerals are given to the portions that perform the same functions as those in the previous drawings. The self-propelled soil improvement machine shown in FIGS. 11 and 12 and the previous FIG.
The main structural difference from the self-propelled soil improvement machine shown in FIG. 3 is that, as described above, the sieving device 92 is provided above the hopper 12 to sort the input sand according to the particle size. A so-called rotary feeder 93 is provided as a soil-improving-material supplying means of the soil-improving-material supplying device 27. The rest of the configuration is almost the same as the self-propelled soil improvement machine shown in FIGS.

In FIGS. 11 and 12, 94 is a frame body as the main body of the sieving device 92 having upper and lower openings, 95 is a spring for supporting the frame body 94 on the support frame 10 in a vibrating manner, and 96 is a frame body 94. 11 (see FIG. 12), the lattice 96 is inclined so that the left side in FIG. 11 is lowered. Reference numeral 97 is an eccentric drum, and the eccentric drum 97 is a rotary shaft (not shown) inserted through the frame 94.
Are provided at both ends, and the center of gravity is separated from the center of rotation by a predetermined distance. Reference numeral 98 is a drive device for the sieve device 92 (see FIG. 12), and 99 is a drive force for the drive device 98.
It is a belt that is transmitted to 7.

That is, the sieving device 92 is adapted to vibrate the entire device on the support frame 10 by rotating the eccentric drum 97. As a result, of the earth and sand that have been thrown in, large lumps having a particle size equal to or larger than the size of the grid 96 and foreign substances are removed and discharged to the outside of the machine (in this case, the left side in FIG. 11), and the particle size is the grid 96. Those smaller than the mesh size are selected and introduced into the hopper 12 as the soil to be modified.

The rotary feeder 93 has a built-in rotary-driving rotor having a plurality of partition walls radially provided on the rotary shaft, although not shown in order to prevent complication. The soil improving material received in the space between the partition walls is sequentially added to the earth and sand on the transport conveyor 13 located below. Similarly, although not particularly shown, this self-propelled soil improvement machine is provided with a stirring means for cutting out the soil improvement material to the rotary feeder 93 near the bottom of the storage tank 28.
It is considered that the soil improvement material can be smoothly supplied to the rotary feeder 93.

The above-described respective embodiments and modified examples of the present invention can be applied to the self-propelled soil improvement machine as shown in FIGS. 11 and 12 as described above. The effect can be obtained.

Further, the self-propelled soil improvement machine shown in FIGS. 11 and 12 is a sieve device 92 composed of a so-called vibrating sieve.
However, the above-described respective embodiments and modified examples of the present invention can be applied to a self-propelled soil improvement machine in which a mere fixed screen that does not vibrate is provided above the hopper. It is needless to say that the configuration described above can be applied to a so-called slant provided above the sieving device 92 in consideration of the ability of the sieving device 92 to feed the soil. Similar effects are obtained in these cases.

With regard to the self-propelled soil improvement machine shown in FIGS. 11 and 12, since large foreign matters and large lumps contained in the soil to be reformed are removed by the screen device 92 in advance, there is little foreign matter and good quality. It has the advantage that it can produce improved soil. Therefore, for example, it is particularly suitable for the construction soil improvement such as the construction soil generated at a construction site or the like is mixed with the soil improvement material on the site to generate an improved soil product for recycling.

On the other hand, in general, when a large amount of soil improvement material is supplied, the screw feeder can adjust the supply amount of the soil improvement material more accurately than the rotary feeder. Therefore, the self-propelled soil improving machine equipped with the soil improving agent supply device for supplying the soil improving agent by the screw feeder has an advantage that it can deal with various kinds of soil to be improved. That is, the self-propelled soil improvement machine of FIGS. 1 to 3 equipped with the soil improvement agent supply device 27 for supplying the soil improvement agent by the screw feeder 29 is more than the self-propelled soil improvement machine of FIGS. 11 and 12. Moreover, there is an advantage that it can deal with various types of soil.

In particular, the self-propelled soil conditioner shown in FIGS. 1 to 3 can be applied to, for example, earth and sand containing large lumps and stones, earth and sand having high viscosity, and the like which is difficult to pass through the lattice. ,
The sieving device is omitted. Therefore, for example, by modifying the earth and sand excavated in the surface layer of a residential land construction site, etc. on the spot, to generate improved soil to be backfilled to the surface layer to strengthen the ground, or at a predetermined site in the site such as a road construction site. It is considered that it can be widely applied to surface ground stabilization treatment, such as modifying the soil obtained by excavation on the spot to generate improved soil to be laid as a roadbed material.

However, in any of the self-propelled soil improvers of FIGS. 1 to 3 and the self-propelled soil improvers of FIGS. 11 and 12, soil is accepted and used as a soil improver. The basic structure of generating improved soil by mixing is similar, and although each has applicability as described above,
They both have versatility for the above-mentioned construction soil improvement and surface ground stabilization treatment.

Lastly, in the above description, the self-propelled soil improvement machine provided with the so-called crawler type traveling device 2 having the crawler belt 7 has been described as an example, but the present invention is not limited to this and, for example, a so-called wheel type traveling body is used. It may be equipped with a self-propelled soil improvement machine. Further, for example, in a self-propelled soil improving machine equipped with a so-called crushing type mixing device for crushing and mixing earth and sand and a soil improving material by using a rotary impactor rotating at high speed, etc., each embodiment of the present invention And the modifications are applicable. Similar effects are obtained in these cases.

[0064]

According to the present invention, since the downstream side wall surface of the conveyor in the hopper in the earth and sand conveying direction is a movable wall,
It is possible to loosen the earth and sand pressed against the movable wall, and to prevent the earth and sand from being compacted and strongly compacted. Therefore, it is possible to prevent the bridging phenomenon from occurring in the hopper, so that the earth and sand can be smoothly transported to the outside of the hopper, and as a result, a stable earth and sand supply amount can be secured.

[Brief description of drawings]

FIG. 1 is a side view showing the overall structure of an embodiment of a self-propelled soil improvement machine of the present invention.

FIG. 2 is a top view showing the overall structure of an embodiment of the self-propelled soil improvement machine of the present invention.

FIG. 3 is a front view showing the entire structure of one embodiment of the self-propelled soil improvement machine of the present invention, as viewed from the left side in FIG. 1.

FIG. 4 is a side sectional view schematically showing the structure of a hopper provided in an embodiment of the self-propelled soil improvement machine of the present invention.

FIG. 5 is a cross-sectional view taken along the line VV in FIG. 4, which schematically illustrates the structure of a hopper provided in an embodiment of the self-propelled soil improvement machine of the present invention.

FIG. 6 is a horizontal cross-sectional view showing a detailed structure of a mixing device provided in an embodiment of the self-propelled soil improvement machine of the present invention.

FIG. 7 is a side sectional view taken along the line VII-VII in FIG. 6 showing the detailed structure of the mixing device provided in the embodiment of the self-propelled soil improvement machine of the present invention.

FIG. 8 is a cross-sectional view schematically showing the structure of a hopper provided in a modification provided with a rod-shaped member in one embodiment of the self-propelled soil improvement machine of the present invention, and is a view corresponding to FIG. 5. .

FIG. 9 is a side sectional view schematically showing the structure of a hopper provided in another embodiment of the self-propelled soil improvement machine of the present invention, and is a view corresponding to FIG. 4.

FIG. 10 is a side sectional view schematically showing a structure of a hopper provided in still another embodiment of the self-propelled soil improvement machine of the present invention, and is a view corresponding to FIG. 4.

FIG. 11 is a side view showing the entire structure of a self-propelled soil improvement machine to which the present invention can be applied, which is equipped with a soil improvement material supply device equipped with a sieve device and a rotary feeder. is there.

FIG. 12 is a top view showing the entire structure of a self-propelled soil improvement machine to which the present invention can be applied, which is equipped with a soil improvement material supply device equipped with a sieve device and a rotary feeder. is there.

[Explanation of symbols]

12 hoppers 12A movable wall (unraveling means) 13 Conveyor 73 Rod member 25 Drive

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Hiroki Takeuchi             Hitachi Construction Machinery Co., Ltd.             Ceremony Company Tsuchiura Factory F-term (reference) 2D040 AB07 CD07 EB04                 4D067 CG06 GA03 GB05                 4G037 AA06 EA03

Claims (10)

[Claims] 1. A self-propelled soil improvement machine for mixing received soil with a soil improvement agent for reforming, a hopper for receiving the soil, a conveyor for conveying the soil received by the hopper, and a hopper for the hopper. A self-propelled soil improvement machine comprising: a movable wall forming a downstream side wall surface in the earth and sand conveyance direction by the conveyor, and a drive device for driving the movable wall. 2. The self-propelled soil improvement machine according to claim 1, wherein the movable wall makes a circular motion. 3. The self-propelled soil improvement machine according to claim 1, wherein the movable wall swings. 4. The self-propelled soil improvement machine according to claim 1, wherein a plurality of rod-shaped members are provided in a row below the movable wall. . 5. A self-propelled soil conditioner for mixing and modifying the received soil with a soil improving material, comprising: a hopper for receiving the sediment, a conveyor for conveying the soil received by the hopper, and an inside of the hopper. 2. A self-propelled soil improvement machine, comprising: a loosening means for loosening the earth and sand on the downstream side in the earth and sand conveying direction by the conveyor. 6. A bridging prevention device comprising a movable wall which constitutes a downstream side wall surface of a hopper that receives sediment in a conveying direction of a sediment by a conveyor, and a drive device which drives the movable wall. 7. The bridging prevention device according to claim 6, wherein the movable wall orbits. 8. The bridging prevention device according to claim 6, wherein the movable wall oscillates. 9. The bridging prevention device according to claim 6, wherein a plurality of rod-shaped members are provided in a row below the movable wall. 10. A cross-linking prevention device comprising: a loosening means for loosening earth and sand received by a hopper and conveyed by a conveyor.