JP4451758B2 - Soil improvement machine - Google Patents

Description

  The present invention relates to a soil conditioner that is suitably used for improving soil quality such as excavated residual soil that is generated in large quantities at a construction site such as civil engineering.

  In general, in civil engineering work such as construction work and road construction, a large amount of excavated residual soil is generated due to excavation work of earth and sand using a hydraulic excavator. And, in order to reuse this excavated residual soil as backfill material and foundation ground material, there is known a soil improvement machine that generates improved soil by adding and mixing soil improvement materials such as lime and cement to the excavated residual soil. (For example, refer to Patent Document 1).

JP 2000-45263 A

  The soil improvement machine according to this prior art supplies a hopper that receives the soil to be modified to improve the soil, a transport device that transports the soil to be modified received in the hopper, and supplies the soil improvement material to the soil to be modified. The soil improvement material supply device, the mixing tank into which the soil to be reformed and the soil quality improving material conveyed by the transport device are charged, and the soil to be modified and the soil quality improving material mixed in the mixing tank And a discharge device for discharging the improved soil generated in the mixing tank.

  Here, the mixing tank of the soil improvement machine is formed in a box shape with a bottom, and an inlet for charging the soil to be modified and the soil improvement material is formed on the upper side of the mixing tank, and the bottom of the mixing tank The part is formed with a discharge port for discharging the improved soil generated in the mixing tank toward the discharge device.

  On the other hand, the mixing device includes two rotating shafts arranged in parallel in the mixing tank at a constant interval and rotated in synchronization with a motor, and a plurality of blades provided on the two rotating shafts so as to protrude in the radial direction. It consists of members (paddles), and the two target rotary shafts are rotationally driven by a motor, whereby the soil to be reformed and the soil conditioner are stirred and mixed by the blade members of the rotary shafts.

  Then, the soil to be reformed and the soil conditioner introduced into the mixing tank from the inlet of the mixing tank are generated as improved soil by being stirred and mixed by the mixing device, and the improved soil is mixed by the mixing device. After being sent to the discharge port of the tank, it is led out to a discharge device (discharge conveyor) through the discharge port, and discharged to the outside of the soil improvement machine by the discharge device.

  By the way, if the soil to be reformed transported by the transport device includes foreign matter that cannot be crushed, such as gravel (rock) or rooting, this foreign matter is mixed with the soil to be reformed together with the soil to be reformed. Will be thrown in.

  In this way, when the soil to be modified containing foreign matter is introduced into the mixing tank, the soil to be reformed and the soil conditioner are agitated and mixed by the blade member of the mixing device and discharged from the inlet of the mixing tank. While moving to the outlet, there is a problem that foreign matter is caught between the mixing tank and the blade member, between the blade members of two adjacent rotating shafts, and the operation of the mixing device is stopped.

  When the mixing device is stopped by biting in the foreign matter, after the scraped soil and the like in the mixing tank is scraped to the outside, the blade member that has bitten the foreign matter among the plurality of blade members is specified. Therefore, a complicated restoration work such as removing foreign matter from between the blade member and the mixing tank is required. For this reason, a great amount of labor and time are required for this restoration work, and there is a problem that the productivity of the improved soil using the soil improvement machine is significantly reduced.

  On the other hand, if the soil to be reformed that is transported by the transport device contains a crushed soil mass such as clay, the soil mass should be put into the mixing tank in a finely crushed state beforehand. Therefore, it is required to promote the refinement of the improved soil produced in the mixing tank.

  The present invention has been made in view of the above-described problems of the prior art, so that the proper operation of the mixing apparatus is prevented from being hindered by foreign matters contained in the soil to be modified, and the productivity of the improved soil can be increased. The purpose is to provide an improved soil conditioner.

  Another object of the present invention is to provide a soil conditioner capable of reducing the size of the improved soil when the improved soil is generated from the soil to be reformed containing clay blocks such as clay. There is.

In order to solve the above-described problems, the present invention provides a hopper that receives the soil to be modified to be improved, a transport device that transports the soil to be modified received in the hopper, and supplies a soil quality improving material to the soil to be modified. The soil improvement material supply device, the mixing tank into which the soil to be modified and the soil quality improvement material conveyed by the transport device are charged, and the soil to be modified and the soil quality improvement material mixed in the mixing tank Between the downstream position in the conveying direction of the conveying apparatus and the upper position of the mixing apparatus in the mixing tank. It is applied to a soil improvement machine provided with an auxiliary mixing device that is provided and stirred and mixed before the soil to be reformed conveyed by the conveying device is put into the mixing tank .

A feature of the configuration adopted by the invention of claim 1 is that the auxiliary mixing device has a rotating shaft provided extending in a direction substantially perpendicular to the conveying direction of the conveying device, and a radial direction of the rotating shaft. It is constituted by a plurality of stirring tools provided and driving means for selectively rotating the rotating shaft in the same direction as or opposite to the conveying direction of the conveying device .

In the invention of claim 2, the rotating shaft of the auxiliary mixing device is a single rotating shaft, and when the rotating shaft is rotated in the same direction as the conveying direction of the conveying device by the driving means, When the rotating shaft is rotated in the direction opposite to the transport direction of the transport device by the drive means, the foreign substance is forwarded to the discharge device side by the stirrer. There exists in the structure which crushes between conveyance apparatuses .

According to a third aspect of the present invention, the rotation shaft of the auxiliary mixing device is a plurality of rotation shafts arranged side by side in the transport direction of the transport device, and each of the rotary shafts is transported in the transport direction of the transport device by the driving means. When the rotating shafts are rotated in the opposite directions by the drive means, the foreign matter in the soil to be reformed is forwarded to the discharge device side by the stirrer. There exists in the structure which crushes the lump in earth and sand between each said stirring tool .

According to the first aspect of the present invention, the soil to be reformed conveyed by the conveying device can be stirred and mixed by the auxiliary mixing device before being put into the mixing tank. Here, the driving means of the auxiliary mixing device selectively rotates the rotating shaft provided with the plurality of stirring tools in the same direction as or opposite to the conveying direction of the conveying device. When rocks) and foreign matter such as roots are included, the drive means rotates the rotating shaft in the same direction as the transport direction of the transport device, so that the foreign material is advanced to the vicinity of the discharge device and the inside of the mixing tank. It is possible to reduce the problem that foreign matter is caught between the mixing tank and the mixing device. On the other hand, if it contains crushed possible clods in reforming target soil, by drive means rotates in a direction opposite to the conveying direction of the conveying device the rotation axis, pre Me a clod finely crushed Therefore, the improved soil produced in the mixing tank can be made fine and uniform.

According to the invention of claim 2, the drive means rotates the rotating shaft of the auxiliary mixing device in the same direction as the conveying direction of the conveying device, so that the foreign matter contained in the soil to be reformed is stirred by the rotating shaft. It can be hooked on a tool and advanced, and can be put in the vicinity of the discharge device in the mixing tank. Thereby, the distance by which the foreign material in a mixing tank is sent out to a discharge device by a mixing device can be shortened, and this part can reduce the trouble that a foreign material is caught between a mixing device and a mixing tank. Can improve the productivity of the improved soil. On the other hand, the drive means rotates the rotating shaft of the auxiliary mixing device in the direction opposite to the conveying direction of the conveying device, so that the crushed debris contained in the soil to be reformed is converted into each stirring tool of the rotating shaft. And can be crushed by being sandwiched between the transport device. As a result, the lump contained in the soil to be modified can be put into the mixing tank in a finely crushed state beforehand, so that the improved soil generated in the mixing tank can be made fine and uniform. be able to.

According to the invention of claim 3, when foreign matter is contained in the soil to be reformed, by rotating a plurality of rotating shafts in the same direction as the transport direction of the transport device , The fine particles can pass between the stirrers, and only the foreign matters can be delivered and forwarded between the stirrers of the respective rotating shafts, and put into the vicinity of the discharge device in the mixing tank. As a result, the distance at which the foreign matter in the mixing tank is sent out to the discharge device by the mixing device can be greatly shortened, and this prevents the foreign matter from being caught between the mixing device and the mixing tank. Can be reduced.

On the other hand, if the soil to be reformed contains a debris that can be crushed , by rotating a plurality of rotating shafts in opposite directions, the lump can be mixed with a stirring tool of one adjacent rotating shaft. It can be finely pulverized between the stirring tools of other rotating shafts. Thereby, since the earth lump can be thrown into the mixing tank in a more finely crushed state, further refinement and homogenization of the improved soil generated in the mixing tank can be achieved.

  Hereinafter, an embodiment of a soil improvement machine according to the present invention will be described in detail with reference to FIGS. 1 to 10.

  First, FIG. 1 thru | or FIG. 7 shows the 1st Embodiment of this invention, 1 has shown the self-propelled soil improvement machine. Here, the soil improvement machine 1 is reused as a backfill material, a foundation ground material, and the like by adding and mixing a soil improvement material such as lime and cement into excavation residual soil generated at a civil engineering work site, for example. It produces improved soil. And the soil improvement machine 1 is roughly comprised by the below-mentioned traveling body 2, the frame 7, the hopper 8, the conveyance conveyor 9, the soil improvement material supply apparatus 12, the mixing tank 21, the paddle mixer 25, the discharge conveyor 33, the auxiliary mixing apparatus 41, etc. Has been.

  Reference numeral 2 denotes a self-propelled crawler-type traveling body. The traveling body 2 includes a track frame 3, drive wheels 4 and idle wheels 5 provided on the track frame 3, and the drive wheels 4 and idle wheels 5. It is composed of left and right crawlers (crawler belts) 6, 6 and the like wound around. The traveling body 2 performs straight traveling in the front and rear directions, turning traveling in the left and right directions, and the like in accordance with an operation on the travel lever 50 described later.

  Reference numeral 7 denotes a frame provided on the track frame 3 of the traveling body 2. The frame 7 includes a base frame 7A extending forward and rearward on the track frame 3, and one side (front side) of the base frame 7A in the length direction. ) And a front frame 7B to which a later-described hopper 8, a transport conveyor 9 and the like are attached, and a soil improvement material supply device 12 and the like which are provided to rise upward at an intermediate portion in the front and rear directions of the base frame 7A. The intermediate frame 7C to be attached and the rear frame 7D provided on the other side (rear side) in the length direction of the base frame 7A and to which a later-described building cover 48 and the like are attached form a strong support structure.

  Reference numeral 8 denotes a hopper attached to the front frame 7B. The hopper 8 receives the soil to be modified whose soil quality should be improved. Here, the hopper 8 is surrounded by, for example, a side wall inclined obliquely downward from above, and an upper end side thereof is a rectangular upper opening end 8A. Further, the lower end side of the hopper 8 is a rectangular lower opening end 8B having a smaller area than the upper opening end 8A, and the lower opening end 8B opens on a transfer conveyor 9 described later.

  The hopper 8 receives, for example, soil (reformation target soil) excavated by a hydraulic excavator (not shown) from the upper opening end 8A, and this modification target soil A is transferred to the transport conveyor 9 through the lower opening end 8B. It is to be input.

  Reference numeral 9 denotes a transfer conveyor as a transfer device located on the lower side of the hopper 8 and attached to the front frame 7B. The transfer conveyor 9 is moved forward from the lower side of the hopper 8 toward the mixing tank 21 described later. , Extends backwards. Here, the conveyor 9 is attached to the front frame 7B and extends forward and backward, and is provided with a plurality of rollers, and is guided by the rollers of the conveyor frame 10 and extends forward and backward. A belt 11 that forms an endless track and a drive motor (not shown) such as a hydraulic motor that drives the belt 11 are roughly configured.

  Then, the conveyor 9 carries the belt 11 around the conveyor frame 10 so that the reforming target soil A loaded from the lower opening end 8B of the hopper 8 is loaded on the belt 11 and conveyed. The modification target soil A is continuously fed into the mixing tank 21.

  12 is a soil improvement material supply device attached to the intermediate frame 7C, and the soil improvement material supply device 12 supplies soil improvement material B such as lime and cement to the soil A to be reformed conveyed by the conveyor 9. To do. Here, as shown in FIG. 3, the soil conditioner supply device 12 includes a storage tank 13, a chute 15, a screw feeder 16, and the like, which will be described later.

  Reference numeral 13 denotes a storage tank for storing the soil improvement material B, and the storage tank 13 is formed in a bellows shape that can be folded upward and downward by a stretchable material such as a polyethylene rubber material. A flat top plate 13A having a substantially rectangular shape is provided on the upper end side of the storage tank 13, and the top plate 13A has an opening 13B for receiving the soil improvement material B and an opening 13B. , And a cover body 13 </ b> C that can be closed.

  On the other hand, on the intermediate frame 7C, four support columns 14 are mounted so as to be slidable in the upward and downward directions surrounding the storage tank 13, and the corners of the top plate 13A of the storage tank 13 are formed by these support columns 14. By supporting from the lower side, the bellows-like storage tank 13 is held in the extended state.

  Reference numeral 15 denotes a chute attached to the lower end side of the storage tank 13, and the chute 15 is formed in a substantially square-shaped funnel shape gradually tapering from the upper end side toward the lower end side. Connected to the lower end of the tank 13, the lower end of the chute 15 is inserted into a casing 17 described later. And the chute | shoot 15 throws in the soil improvement material B stored in the storage tank 13 in the casing 17. FIG.

  Reference numeral 16 denotes a screw feeder provided on the lower end side of the chute 15. The screw feeder 16 includes a casing 17 and a screw shaft 18 which will be described later, as shown in FIG.

  Reference numeral 17 denotes a cylindrical casing attached to the lower end side of the chute 15. The casing 17 extends obliquely upward from the chute 15 toward the transport conveyor 9 and extends forward and rearward. It is something to house. Here, an introduction port 17A into which the lower end portion of the chute 15 is inserted is formed on the upper surface side of the rear portion of the casing 17, and the introduction port 17A introduces the soil improvement material B introduced from the chute 15 into the casing 17. It is to be introduced. Further, on the lower surface side of the front portion of the casing 17, a lead-out port 17B that opens to the rear upper surface side of the transport conveyor 9 (belt 11) is formed. It is derived to the target earth and sand A.

  A screw shaft 18 is rotatably accommodated in the casing 17, and the screw shaft 18 is provided with spiral blades on the outer peripheral side thereof, and is rotationally driven by a drive motor 19 such as a hydraulic motor.

  Then, the screw feeder 16 rotates the screw shaft 18 in the casing 17 by the drive motor 19, thereby sending the soil improvement material B introduced into the casing 17 from the introduction port 17 </ b> A forward by the screw shaft 18. Then, it is dropped downward through the outlet 17B of the casing 17. Accordingly, an appropriate amount of soil quality improving material B is continuously supplied to the reforming target soil A transported by the transport conveyor 9.

  Reference numeral 20 denotes a crane device for transporting the soil improvement material B into the storage tank 13 of the soil improvement material supply device 12, and the crane device 20 is located on the right side of the soil improvement material supply device 12 as shown in FIG. And is erected on the base frame 7A. And the crane apparatus 20 lifts the soil-improvement material (not shown) packed in the bag upwards, for example, and conveys it in the storage tank 13. FIG.

  21 is a mixing tank that is located below the screw feeder 16 and is attached to the base frame 7A. As shown in FIGS. 4 to 6, the mixing tank 21 is formed as a box with a bottom as a whole, The modification target soil A transported by the transport conveyor 9 and the soil quality improving material B supplied to the modification target soil A by the screw feeder 16 are input.

  Here, the mixing tank 21 is fixed to the front end portion of the bottom surface portion 21A extending in the front and rear directions, and the lower side extends upward from the bottom surface portion 21A in the vertical direction, and the upper side obliquely upwards toward the rear. A front surface portion 21B extending to the rear surface, a rear surface portion 21C fixed to the rear end portion of the bottom surface portion 21A and extending in the vertical direction, a left side surface portion 21D fixed to the left end portions of the bottom surface portion 21A, the front surface portion 21B, and the rear surface portion 21C; It consists of a bottom surface portion 21A, a front surface portion 21B, and a right side surface portion 21E fixed to the right end of the rear surface portion 21C. And inside the mixing tank 21, two paddle mixers 25, 25 described later are rotatably provided.

  In this case, as shown in FIG. 6, the bottom surface portion 21 </ b> A of the mixing tank 21 is formed in a concave curved shape in which two arcs are arranged in the left and right directions so as to allow rotation of each paddle mixer 25. Moreover, as shown in FIG. 4, the height dimension of the front part side (front surface part 21B side) of the mixing tank 21 is set higher than the rear part side (rear surface part 21C side). On the part side, an after-mentioned auxiliary mixing device 41 is arranged.

  In addition, a plurality of (for example, three) upper lid bodies 22 are detachably attached to the upper end side of the mixing tank 21, and the upper end side of the mixing tank 21 is closed by attaching these upper lid bodies 22. is there. Moreover, when each upper cover body 22 is removed, the upper end side of the mixing tank 21 is largely opened, and the maintenance work for each paddle mixer 25 and the like can be performed.

  Reference numeral 23 denotes a charging port provided on the front side of the mixing tank 21. The charging port 23 is formed, for example, in the front surface portion 21B of the mixing tank 21 and extends left and right. As shown in FIG. 4, the rear end side of the transport conveyor 9 is inserted into the mixing tank 21 through the insertion port 23 and is transported by the belt 11 of the transport conveyor 9, and the soil to be modified A and the soil quality improvement. The soil quality improving material B supplied to the reforming target soil A by the material supply device 12 is configured to be charged together into the mixing tank 21 from the charging port 23.

  24 is a discharge port provided on the rear side of the mixing tank 21, and the discharge port 24 is formed, for example, on the rear end side (rear surface portion 21C side) of the bottom surface portion 21A. It opens above the conveyor 33. And the improved soil C produced | generated by mixing the earth-to-be-modified A and the soil improvement material B in the mixing tank 21 becomes a structure discharged | emitted to the discharge conveyor 33 through the discharge port 24. FIG.

  25 and 25 are left and right paddle mixers as a mixing device rotatably provided in the mixing tank 21. These left and right paddle mixers 25 and the soil to be reformed A and the soil quality charged in the mixing tank 21 The improved material B is agitated and mixed to produce improved soil C used for the backfill material and the like. Here, as shown in FIGS. 4 to 6, each paddle mixer 25 includes a rotating shaft 26, a paddle 31, and the like, which will be described later.

  Reference numeral 26 denotes a rotating shaft of the paddle mixer 25. The rotating shaft 26 is formed in a light cylindrical shape using a pipe material or the like as shown in FIG. 4, and extends in the mixing tank 21 in the forward and backward directions. A front support shaft 26A is connected to the front end side of the rotary shaft 26, and the front support shaft 26A is rotatably supported by a bearing 27 attached to the front surface portion 21B of the mixing tank 21. On the other hand, a rear support shaft 26B is connected to the rear end side of the rotary shaft 26, and the rear support shaft 26B is rotatably supported by a bearing 28 attached to the rear surface portion 21C of the mixing tank 21.

  Further, a drive motor 29 such as a hydraulic motor attached to the rear surface portion 21C of the mixing tank 21 is connected to the rear end portion of the rear side support shaft 26B rotatably supported by the bearing 28, so that the left and right rotations can be performed. The shafts 26 are rotated in opposite directions by the drive motor 29. A timing gear 30 is attached between the bearing 28 and the drive motor 29 in the rear support shaft 26B, and the timing gear 30 is engaged with each other when the left and right rotating shafts 26 are rotated. The start and stop timings of the respective rotary shafts 26 are made to coincide with each other, and the later-described paddles 31 provided on the respective rotary shafts 26 are prevented from interfering with each other.

  31 are a number of paddles attached to each rotary shaft 26. Each paddle 31 has an arm 31A protruding in the radial direction of the rotary shaft 26 and a rectangular shape bolted to the arm 31A. The stirring plate 31B. Here, the arms 31 </ b> A are arranged at a constant interval in the longitudinal direction (front and rear directions) of the rotating shaft 26 and are arranged at a constant angular interval (for example, 90 degrees) in the circumferential direction of the rotating shaft 26. . On the other hand, the stirring plate 31B is attached to the arm 31A with a constant inclination angle with respect to the axial direction of the rotary shaft 26.

  Then, the left and right paddle mixers 25 are rotated in opposite directions in the mixing tank 21 by the drive motor 29, and the soil to be modified A and the soil improvement material B introduced into the mixing tank 21 are supplied to each paddle 31. The improved soil C is generated by stirring and mixing with the stirring plate 31B. At this time, since the stirring plate 31B of each paddle 31 is inclined with respect to the axial direction of the rotating shaft 26, the improved soil C generated in the mixing tank 21 is moved to the rear side of the mixing tank 21 by the stirring plate 31B. And is discharged to a discharge conveyor 33 (to be described later) through a discharge port 24 provided in the bottom surface portion 21A of the mixing tank 21.

  Reference numeral 32 denotes a scraping bar protruding from the rear side of each rotary shaft 26. The scraping bar 32 protrudes in the radial direction of the rotary shaft 26 as shown in FIG. Arranged above the outlet 24. The scraping bar 32 scrapes the accumulated improved soil C toward the discharge conveyor 33 when a large amount of the improved soil C generated in the mixing tank 21 is accumulated around the discharge port 24. .

  Reference numeral 33 denotes a discharge conveyor as a discharge device that extends forward and backward while tilting obliquely upward from the lower side of the mixing tank 21, and the discharge conveyor 33 is disposed in the mixing tank 21 as shown in FIG. The improved soil C generated in the above is discharged to the outside of the soil improvement machine 1.

  Here, as shown in FIGS. 1 and 2, the discharge conveyor 33 is attached to the base frame 7A and the like and extends in the front and rear directions, the front side is disposed below the mixing tank 21, and the rear side is oblique. An upwardly inclined conveyor frame 34, a belt 35 that is guided by a plurality of rollers provided on the conveyor frame 34 to form an endless track extending forward and backward, and a drive of a hydraulic motor or the like that drives the belt 35 The motor 36 is generally configured.

  And the discharge conveyor 33 conveys the improved soil C discharged | emitted from the discharge port 24 of the mixing tank 21 to the rear side of the soil improvement machine 1 by the belt 35 by making the belt 35 circulate along the conveyor frame 34. And it discharges continuously outside the soil improvement machine 1.

  Reference numeral 41 denotes an auxiliary mixing device provided in the mixing tank 21. The auxiliary mixing device 41, as shown in FIG. 4 and the like, is positioned downstream of the conveying conveyor 9 in the conveying direction (arrow F direction) and each paddle mixer 25. It is arrange | positioned between the upper side positions. The auxiliary mixing device 41 stirs and mixes the reforming target soil A transported by the transport conveyor 9 before it is put into the mixing tank 21, and is composed of a rotating shaft 42, each stirrer 45, and the like described later. Has been.

  Reference numeral 42 denotes a single rotating shaft that constitutes the auxiliary mixing device 41. The rotating shaft 42 is disposed in the vicinity of the charging port 23 provided in the mixing tank 21, and is located behind the conveying conveyor 9 inserted into the charging port 23. Extending in a direction (left and right) substantially perpendicular to the transport direction of the transport conveyor 9 (the direction indicated by the arrow F in FIG. 4) with a slight gap formed between the end (downstream side position) Is provided. As shown in FIGS. 5 and 6, one end side (left end side) of the rotating shaft 42 is rotatably supported by a bearing 43 provided on the left side surface portion 21 </ b> D of the mixing vessel 21, and the other end side of the rotating shaft 42. The (right end side) is rotatably supported by a bearing 44 provided on the right side surface 21E of the mixing tank 21.

  45, 45,... Are a number of stirrers attached to the rotating shaft 42. Each stirrer 45 is made of a rod-shaped body having a smaller diameter than the rotating shaft 42 and projects in the radial direction of the rotating shaft 42. . Here, each stirrer 45 is arranged in a comb-like shape with a constant interval in the axial direction (left and right directions) of the rotating shaft 42 as shown in FIG. 6 and the like, and as shown in FIG. They are arranged in the circumferential direction of 42 with a constant angular interval (for example, 45 degrees). In FIGS. 5 and 6, the number of stirring tools 45 arranged in the circumferential direction of the rotating shaft 42 is thinned out.

  Here, as shown in FIG. 4, the rotation shaft 42 of the auxiliary mixing device 41 is disposed on the downstream side in the transport direction (in the direction of arrow F) of the transport conveyor 9. For this reason, the distance from the rear end of the conveyor 9 inserted in the inlet 23 of the mixing tank 21 to the outlet 24 of the mixing tank 21 is L1, and each of the stirring tools 45 provided on the rotating shaft 42 is discharged. If the distance from the front end of the stirring tool 45 located on the outlet 24 side to the discharge port 24 is L2, the distance L2 from the front end of the stirrer 45 to the discharge port 24 is discharged from the rear end of the conveyor 9. It is smaller than the distance L1 to the outlet 24 (L2 <L1).

  Reference numeral 46 denotes a drive motor such as a hydraulic motor that rotates the rotary shaft 42. The drive motor 46 is attached to the right side surface portion 21 E of the mixing tank 21 and is coupled to the other end side of the rotary shaft 42 supported by the bearing 44. Connected through. Here, as shown in FIG. 4, the drive motor 46 moves the rotating shaft 42 in the direction indicated by the arrow RF, which is the same as the direction of conveyance of the transfer conveyor 9 (the direction indicated by arrow F), and as shown in FIG. Is selectively rotated in the direction indicated by the arrow RR, which is the opposite direction to the direction of conveyance (the direction indicated by arrow F).

  And, for example, as shown in FIG. 4, when the foreign material D that cannot be crushed, such as gravel (stone), rooting, etc. is included in the reforming target sand A transported by the transport conveyor 9, the drive motor 46 is The rotating shaft 42 is rotated in the same direction (arrow RF direction) as the transport direction (arrow F direction) of the conveyor 9. As a result, the foreign matter D does not fall directly from the conveyor 9 into the mixing tank 21, but is forwarded by being caught by each stirring tool 45 provided on the rotating shaft 42, and the discharge conveyor 33 in the mixing tank 21. It comes to fall to a position close to the discharge port 24 that opens upward. Further, fine particles other than the foreign matter D in the soil A to be modified pass between the respective stirring tools 45 and fall into the mixing tank 21.

  In this case, the distance L2 from the front end portion of the stirring tool 45 to the discharge port 24 is smaller than the distance L1 from the rear end portion of the transport conveyor 9 to the discharge port 24. It is possible to reduce the distance at which the foreign matter D that has fallen on the head is sent out to the discharge port 24 by each paddle 31 of the paddle mixer 25. Therefore, the number of times that the foreign matter D is agitated by the paddle 31 can be reduced, and a problem that the foreign matter D is caught between the paddle 31 and the mixing tank 21 while the foreign matter D is sent to the discharge port 24 can be reduced.

  On the other hand, for example, as shown in FIG. 7, when the soil to be reformed A conveyed by the conveyor 9 includes a debris that can be crushed such as clay, the drive motor 46 rotates the rotating shaft 42. The conveying conveyor 9 is rotated in the direction opposite to the conveying direction (arrow F direction) (arrow RR direction). Thereby, the soil mass E is pinched | interposed between each stirring tool 45 provided in the rotating shaft 42, and the conveyance conveyor 9 (belt 11), and falls in the mixing tank 21 in the state finely crushed between both. To do.

  As described above, when the auxiliary mixing device 41 rotates the rotating shaft 42 in the same direction as the conveying direction of the conveying conveyor 9, the auxiliary mixing device 41 removes the foreign matter D contained in the reforming target soil A from the outlet 24 side of the mixing tank 21. A foreign matter advance operation is carried out to advance to the discharge conveyor 33 side, and the problem of foreign matter D being caught between the paddle 31 and the mixing tank 21 of the paddle mixer 25 is reduced.

  Further, when the auxiliary mixing device 41 rotates the rotating shaft 42 in the direction opposite to the conveying direction of the conveying conveyor 9, the auxiliary mixing device 41 converts the soil mass E contained in the reforming target sand A with each stirring tool 45 of the rotating shaft 42. The clot crushing operation for crushing with the conveying conveyor 9 is performed to make the clot E finer.

  1 and 2 is a building cover 48 provided on the rear frame 7D, and an engine, a hydraulic pump driven by the engine, etc. (both not shown) are included in the building cover 48. The power source is housed. Various hydraulic actuators mounted on the soil improvement machine 1 are driven by pressure oil supplied from a hydraulic pump.

  Reference numeral 49 denotes a cab provided in the vicinity of the building cover 48, and 50 denotes a travel lever disposed on the cab 49. An operator who gets on the cab 49 operates the travel lever 50 to operate the travel body. By driving the left and right crawlers 2, the soil improvement machine 1 can be self-propelled to the work site.

  The soil improvement machine 1 according to the present embodiment has the above-described configuration, and the operation thereof will be described below.

  First, an operator gets into the cab 49 of the soil improvement machine 1 and operates the travel lever 50 of the cab 49. As a result, the left and right crawlers 6 of the traveling body 2 are driven forward or backward, and the soil improvement machine 1 self-travels to the work site and stops.

  Next, in a state where the soil improvement machine 1 is stopped at the work site, the soil improvement material B such as lime and concrete packed in a bag is lifted using the crane device 20, and this soil improvement material B is supplied to the soil improvement material supply device. Twelve storage tanks 13 are charged.

  At this time, the bag filled with the soil improvement material B is torn by a cutter (not shown) provided in the storage tank 13, and as shown in FIG. Material B is stored. Then, the soil improvement material B in the storage tank 13 is introduced into the casing 17 of the screw feeder 16 through the chute 15.

  On the other hand, the soil to be reformed A is put into the hopper 8 of the soil improvement machine 1 using a hydraulic excavator or the like (not shown). As a result, the soil A to be reformed is guided from the upper opening end 8A of the hopper 8 to the lower opening end 8B and falls onto the belt 11 of the conveyor 9 from the lower opening end 8B as shown in FIG. To do.

  The reforming target soil A that has fallen on the belt 11 of the transport conveyor 9 is transported to the mixing tank 21 by the belt 11. The soil improvement material B introduced into the casing 17 of the screw feeder 16 is sent to the outlet 17B of the casing 17 by the screw shaft 18 and is transported by the conveyor 9 from the outlet 17B. Supplied to earth and sand A.

  In this way, the soil improvement material B is added to the reforming target soil A transported by the transport conveyor 9 before the mixing tank 21, and the reforming target sand A and the soil improvement material B are mixed with the mixing tank 21. Are put together into the mixing tank 21 from the inlet 23.

  At this time, since the two paddle mixers 25 are rotating in the mixing tank 21, the soil to be reformed A and the soil improvement material B introduced into the mixing tank 21 are stirred and mixed by the paddles 31 of each paddle mixer 25. Is done. As a result, in the mixing tank 21, an improved soil C in which the soil to be modified A and the soil quality improving material B are appropriately mixed is generated, and the improved soil C is added to the paddle 31 of each paddle mixer 25 in the mixing tank 21. It is sent out to the discharge port 24.

  And the improved soil C produced | generated in the mixing tank 21 falls on the belt 35 of the discharge conveyor 33 from the discharge port 24, and is discharged | emitted outside the soil improvement machine 1 by being conveyed by this belt 35. .

  By performing a series of soil improvement operations using the soil improvement machine 1 in this way, the improved soil C suitable for use as backfill material, foundation ground material, etc. from excavation residual soil generated by civil engineering work, etc. Can be produced.

  Next, the case where the foreign material D which cannot be crushed, such as a gravel (rock) and root extraction, is contained in the modification | reformation target sand A is demonstrated, referring FIG.

  In this case, the rotation shaft 42 of the auxiliary mixing device 41 provided between the transport conveyor 9 and the paddle mixer 25 is set in the same direction (arrow F direction) as the transport direction (arrow F direction) of the transport conveyor 9. Rotate. Thereby, the foreign substance D thrown into the mixing tank 21 from the transport conveyor 9 is caught by each stirring tool 45 provided on the rotating shaft 42 without falling directly into the mixing tank 21 from the transport conveyor 9. And is dropped to a position in the mixing tank 21 that is close to the discharge port 24 (foreign matter advance operation).

  Accordingly, the distance (L2) in which the foreign matter D falling into the mixing tank 21 is sent to the discharge port 24 by each paddle 31 of the paddle mixer 25 can be shortened, and the foreign matter D is agitated by the paddle 31 correspondingly. Since the number of times can be reduced, it is possible to reduce the problem of being caught between the paddle 31 and the mixing tank 21 while the foreign matter D is sent to the discharge port 24. And the foreign material D which fell to the position which approached the discharge port 24 is discharged | emitted from the discharge port 24 to the discharge conveyor 33 with the improved soil C produced | generated in the mixing tank 21. FIG.

  As described above, the auxiliary mixing device 41 performs the foreign substance advance operation, thereby reducing the problem that the foreign substance D is caught between the paddle 31 of the paddle mixer 25 and the mixing tank 21 and removing the caught foreign substance D. Since complicated restoration work can be eliminated, the productivity of the improved soil C can be increased by operating the paddle mixer 25 continuously over a long period of time.

  Next, the case where the crushed earth lump E such as clay is included in the modification target soil A will be described with reference to FIG.

  In this case, the rotation shaft 42 of the auxiliary mixing device 41 provided between the transport conveyor 9 and the paddle mixer 25 is in a direction opposite to the transport direction (arrow F direction) of the transport conveyor 9 (arrow RR direction). Rotate to Thereby, the earth lump E thrown in into the mixing tank 21 from the conveyance conveyor 9 is pinched | interposed between each stirring tool 45 provided in the rotating shaft 42, and the conveyance conveyor 9 (belt 11), and the earth A for reforming A Can be put into the mixing tank 21 in a state of being finely crushed to the same extent (a lump crushing operation).

  Thus, since the auxiliary mixing device 41 performs the lump crushing operation, the lump E contained in the reforming target sand A can be put into the mixing tank 21 in a finely crushed state beforehand. The improved soil C produced in the mixing tank 21 can be made fine and uniform, and the improved soil C can be produced with good quality.

  Next, FIGS. 8 to 10 show a second embodiment of the present invention. The feature of this embodiment is that an auxiliary mixing device having two rotating shafts is provided. In the present embodiment, the same components as those in the first embodiment described above are denoted by the same reference numerals, and the description thereof is omitted.

  In the figure, 61 is an auxiliary mixing device provided in the mixing tank 21, and this auxiliary mixing device 61 is used in this embodiment instead of the auxiliary mixing device 41 according to the first embodiment described above. is there. The auxiliary mixing device 61 is disposed between the downstream position in the transport direction (arrow F direction) of the transport conveyor 9 and the upper position of each paddle mixer 25, and is to be reformed earth and sand A transported by the transport conveyor 9. Is mixed with stirring before being put into the mixing tank 21. Here, the auxiliary mixing device 61 is composed of two rotating shafts 62 and 68, which will be described later, the respective stirring tools 65 and 71, and the like.

  62 is one of the rotation shafts arranged along with the rotation shaft 68 to be described later in the transport direction of the transport conveyor 9 (the direction indicated by the arrow F in FIG. 8). The rotation shaft 62 is connected to the inlet 23 of the mixing tank 21. Provided extending in the direction (left, right) substantially perpendicular to the transport direction of the transport conveyor 9 with a slight gap formed between the rear end (downstream position) of the inserted transport conveyor 9 ing. 9, one end side (left end side) of the rotating shaft 62 is rotatably supported by a bearing 63 provided on the left side surface portion 21D of the mixing tank 21, and the other end side (right end side) of the rotating shaft 62 is provided. ) Is rotatably supported by a bearing 64 provided on the right side surface portion 21E of the mixing tank 21.

  65 are a large number of stirring tools protruding in the radial direction of the rotating shaft 62. Each stirring tool 65 is a rod-shaped body having a smaller diameter than the rotating shaft 62. As shown in FIG. They are arranged in a comb-like shape with a constant interval in the axial direction of 62, and are also arranged with a constant angular interval (for example, 45 degrees) in the circumferential direction of the rotating shaft 62 as shown in FIG. In FIG. 9, the number of stirring tools 65 arranged in the circumferential direction of the rotating shaft 62 is thinned out.

  Reference numeral 66 denotes a drive motor such as a hydraulic motor that rotates the rotary shaft 62. The drive motor 66 is attached to the right side surface portion 21 E of the mixing tank 21 and is coupled to the other end side of the rotary shaft 62 supported by the bearing 64. Connected through. And the drive motor 66 rotates the rotating shaft 62 in the arrow RF direction which becomes the same direction as the conveyance direction (arrow F direction) of the conveyance conveyor 9. FIG.

  Reference numeral 68 denotes the other rotating shaft provided adjacent to the rotating shaft 62 in the conveying direction of the conveying conveyor 9 (in the direction of arrow A). The rotating shaft 68 is provided with the rotating shaft 62 in the mixing tank 21. 23, and extends in a direction (left and right) substantially orthogonal to the transport direction of the transport conveyor 9 with a slight gap formed between the rotary shaft 62 and the transport shaft 9. 9, one end side (left end side) of the rotating shaft 68 is rotatably supported by a bearing 69 provided on the left side surface portion 21D of the mixing vessel 21, and the other end side (right end side) of the rotating shaft 68 is provided. ) Is rotatably supported by a bearing 70 provided on the right side surface portion 21E of the mixing tank 21.

  71, 71,... Are a number of stirring tools protruding in the radial direction of the rotating shaft 68. Each stirring tool 71 is made of a rod-shaped body having a smaller diameter than the rotating shaft 68, and is constant in the axial direction of the rotating shaft 68. Are arranged in a comb-like shape with a certain interval, and are arranged with a certain angular interval (for example, 45 degrees) in the circumferential direction of the rotating shaft 68. And as shown in FIG. 9, each stirring tool 71 of the rotating shaft 68 and each stirring tool 65 of the rotating shaft 62 become the structure which continues with a slight clearance in the axial direction of each rotating shaft 62,68. Yes.

  Here, as shown in FIG. 8, the rotation shaft 62 and the rotation shaft 68 of the auxiliary mixing device 61 are arranged adjacent to the downstream side in the transport direction (arrow F direction) of the transport conveyor 9. For this reason, the distance from the rear end portion of the conveyor 9 inserted into the input port 23 of the mixing tank 21 to the discharge port 24 of the mixing tank 21 is L1, and each of the stirring tools 71 provided on the rotary shaft 68 is discharged. Assuming that the distance from the tip of the stirring tool 71 located on the outlet 24 side to the discharge port 24 is L3, the distance L3 from the tip of the stirring tool 71 to the discharge port 24 is discharged from the rear end of the conveyor 9. The distance L1 is smaller than the distance L1 to the outlet 24, and is further smaller than the distance L2 from the tip of the stirring tool 45 of the rotating shaft 42 to the outlet 24 according to the first embodiment shown in FIG. 4 (L3 < L2 <L1).

  Reference numeral 72 denotes a drive motor such as a hydraulic motor that rotates the rotation shaft 68. The drive motor 72 is attached to the right side surface portion 21 E of the mixing tank 21 and is coupled to the other end side of the rotation shaft 68 supported by the bearing 70. Connected through. Then, the drive motor 72 causes the rotation shaft 68 to move in the direction indicated by the arrow RF, which is the same as the conveyance direction (arrow F direction) of the conveyor 9 as shown in FIG. 8, and as shown in FIG. Is selectively rotated in the direction indicated by the arrow RR, which is the opposite direction to the direction of conveyance (the direction indicated by arrow F).

  For example, as shown in FIG. 8, when the soil to be reformed A transported by the transport conveyor 9 contains foreign matter D that cannot be crushed, such as gravel (stone) and root removal, the drive motor 66 rotates. The shaft 62 is rotated in the same direction (arrow F direction) as the transfer direction (arrow F direction) of the transfer conveyor 9, and the drive motor 72 is rotated in the same direction as the transfer direction of the transfer conveyor 9 (arrow RF). Direction).

  As a result, the foreign matter D does not fall directly into the mixing tank 21 from the transport conveyor 9, but is forwarded to the rotating shaft 68 side by being caught by each stirring tool 65 of the rotating shaft 62. It is advanced by being caught by each stirring tool 71, and comes to fall in the position close to the discharge port 24 opened on the discharge conveyor 33 in the mixing tank 21. Further, fine particles other than the foreign matter D in the soil A to be modified pass between the respective stirring tools 65 of the rotating shaft 62 and the respective stirring tools 71 of the rotating shaft 68 and fall into the mixed layer 21.

  In this case, a distance L3 from the front end portion of the stirring tool 71 of the rotating shaft 68 to the discharge port 24 is smaller than a distance L1 from the rear end portion of the transport conveyor 9 to the discharge port 24, and further, the first L shown in FIG. The distance L2 from the front-end | tip part of the stirring tool 45 of the rotating shaft 42 to the discharge port 24 by this embodiment is smaller.

  For this reason, the distance by which the foreign matter D that has been forwarded by the stirrer 71 and dropped into the mixing tank 21 is sent to the discharge port 24 by each paddle 31 of the paddle mixer 25 can be greatly shortened. Accordingly, the number of times that the foreign matter D is stirred by the paddle 31 can be further reduced, and the problem that the foreign matter D is caught between the paddle 31 and the mixing tank 21 while being delivered to the discharge port 24 can be reliably reduced. it can.

  On the other hand, for example, as shown in FIG. 10, when the soil to be reformed A transported by the transport conveyor 9 includes a crushed soil mass E such as clay, the drive motor 66 transports the rotary shaft 62. While rotating the conveyor 9 in the same direction (arrow F direction) as the conveying direction (arrow F direction), the drive motor 72 rotates the rotary shaft 68 in the direction opposite to the conveying direction of the conveyor 9 (arrow RR direction). Rotate.

  As a result, the soil mass E is sandwiched between each stirring tool 65 of the rotating shaft 62 and each stirring tool 71 of the rotating shaft 68 and finely crushed. In this case, each stirrer 65 of the rotating shaft 62 and each stirrer 71 of the rotating shaft 68 are continuous with a slight gap in the axial direction of the respective rotating shafts 62, 68. The earth lump E sandwiched between 65 and each stirring tool 71 of the rotating shaft 68 can be put into the mixing tank 21 in a state of being further finely crushed between the two.

  As described above, when the auxiliary mixing device 61 rotates the rotating shaft 62 and the rotating shaft 68 in the same direction as the conveying direction of the conveying conveyor 9, the auxiliary mixing device 61 removes the foreign matter D contained in the soil A to be reformed from the mixing tank 21. In this configuration, the foreign matter is fed forward to the discharge port 24 side (discharge conveyor 33 side) to reduce the problem that the foreign matter D is caught between the paddle 31 and the mixing tank 21 of the paddle mixer 25. .

  In addition, the auxiliary mixing device 61 rotates the rotating shaft 62 in the same direction as the conveying direction of the conveying conveyor 9 and rotates the rotating shaft 68 in the direction opposite to the conveying direction of the conveying conveyor 9. A structure in which the clot E is crushed between the stirrers 65 of the rotary shaft 62 and the stirrers 71 of the rotary shaft 68 to reduce the size of the clot E. It has become.

  The soil improvement machine according to the present embodiment has the auxiliary mixing device 61 as described above, and the basic operation is not different from that according to the first embodiment described above.

  However, according to the present embodiment, the rotary shaft 62 provided with a large number of stirring tools 65 and the rotary shaft 68 provided with a large number of stirring tools 71 are provided adjacent to the transport direction of the transport conveyor 9. It is configured.

  Thus, for example, as shown in FIG. 8, when foreign matter D such as gravel or rooting is included in the soil to be reformed A conveyed by the conveyor 9, the rotating shaft 62 and the rotating shaft 68 are transferred to the conveyor. 9, the foreign matter D is transferred between the stirring tool 65 of the rotating shaft 62 and the stirring tool 71 of the rotating shaft 68 and is largely advanced to the vicinity of the discharge port 24 of the mixing tank 21. I can do it.

  In this way, the auxiliary mixing device 61 advances the foreign matter D contained in the soil to be modified A to the vicinity of the discharge port 24 of the mixing tank 21, so that the stirring tool 71 of the rotating shaft 68 enters the mixing tank 21. The distance by which the fallen foreign matter D is sent to the discharge port 24 by each paddle 31 of the paddle mixer 25 can be greatly shortened. As a result, the number of times the foreign matter D is agitated by the paddle 31 can be further reduced, and the problem that the foreign matter D is caught between the paddle 31 and the mixing tank 21 while being delivered to the discharge port 24 is reliably reduced. Can do.

  On the other hand, for example, as shown in FIG. 10, when the crushed earth lump E such as clay is included in the reforming target soil A transported by the transport conveyor 9, the rotating shaft 62 is moved in the transport direction of the transport conveyor 9. And rotating the rotating shaft 68 in the direction opposite to the conveying direction of the conveying conveyor 9, a lump between the stirring tools 65 of the rotating shaft 62 and the stirring tools 71 of the rotating shaft 68 is rotated. E can be sandwiched and the earth block E can be crushed more finely.

  As described above, the auxiliary mixing device 61 introduces the soil block E contained in the modification target soil A into the mixing tank 21 in a state of being finely crushed in advance, thereby improving the soil C generated in the mixing tank 21. Can be further refined and homogenized, and high-quality improved soil C can be produced.

  In the above-described second embodiment, the case where the two rotating shafts 62 and 68 are arranged side by side in the transport direction of the transport conveyor 9 is illustrated. However, the present invention is not limited to this. For example, three or more rotating shafts may be arranged in the transport direction of the transport conveyor 9. In this case, by rotating each rotating shaft in the same direction as the transport direction of the transport conveyor 9, foreign matter D such as gravel contained in the soil A to be reformed is advanced to the vicinity of the discharge port 24 of the mixing tank 21. It is possible to crush the soil mass E contained in the soil A to be reformed by rotating adjacent rotating shafts in opposite directions.

  Moreover, in each embodiment mentioned above, the case where the two paddle mixers 25 are provided as a mixing apparatus provided in the mixing tank 21 is illustrated. However, the present invention is not limited to this. For example, a screw-type mixer may be used instead of the paddle mixer 25.

  Moreover, in each embodiment mentioned above, the soil improvement machine 1 which has the crawler type traveling body 2 which can be self-propelled is mentioned as an example, and is demonstrated. However, the present invention is not limited to this, and may be configured to include, for example, a wheel-type traveling body.

It is a front view which shows the soil improvement machine by the 1st Embodiment of this invention. It is a top view which shows a soil improvement machine. It is a partially broken front view which shows roughly the structure of a hopper, a conveyance conveyor, a soil improvement material supply apparatus, a mixing tank, a discharge conveyor, etc. in FIG. FIG. 4 is an enlarged cross-sectional view of a main part illustrating the auxiliary mixing device, the mixing tank, the paddle mixer, and the like in FIG. It is sectional drawing which looked at the mixing tank, the paddle mixer, the auxiliary | assistant mixing apparatus, etc. from the arrow VV direction in FIG. It is sectional drawing which looked at the mixing tank, the paddle mixer, the auxiliary | assistant mixing apparatus, etc. from the arrow VI-VI direction in FIG. It is sectional drawing of the principal part expansion similar to FIG. 4 which shows the clot crushing operation | movement by an auxiliary mixing apparatus. It is sectional drawing of the principal part expansion which shows the auxiliary mixing apparatus by the 2nd Embodiment, a mixing tank, a paddle mixer, etc. in the state which an auxiliary mixing apparatus performs foreign material advance operation | movement. It is sectional drawing which looked at the mixing tank, the paddle mixer, the auxiliary | assistant mixing apparatus, etc. from the arrow IX-IX direction in FIG. It is sectional drawing of the principal part expansion similar to FIG. 8 which shows the clot crushing operation | movement by an auxiliary mixing apparatus.

Explanation of symbols

2 Traveling body 7 Frame 8 Hopper 9 Conveyor (conveyor)
12 Soil Improvement Material Supply Device 13 Storage Tank 15 Chute 16 Screw Feeder 21 Mixing Tank 23 Input Port 24 Discharge Port 25 Paddle Mixer (Mixing Device)
33 Discharge conveyor 41, 61 Auxiliary mixing device 42 Rotating shaft 62 Rotating shaft (one rotating shaft)
68 Rotating shaft (the other rotating shaft)
45, 65, 71 Stirrer 46, 66, 72 Drive motor A Soil to be modified B Soil improvement material C Improved soil D Foreign matter E Clot

Claims (3)

A hopper that receives the soil to be modified to be improved, a transport device that transports the soil to be modified received in the hopper, a soil conditioner supply device that supplies a soil quality improving material to the soil to be modified, and the transport A mixing tank into which the soil to be reformed and the soil quality improving material conveyed by an apparatus are charged, and mixing to generate the improved soil by mixing the soil to be reformed and the soil quality improving material in the mixing tank A device, a discharge device for discharging the improved soil generated in the mixing tank, and a downstream position in the transport direction of the transport device in the mixing tank and an upper position of the mixing device. In the soil conditioner provided with an auxiliary mixing device that is provided and stirred and mixed before the reforming target soil transported by the transporting device is put into the mixing tank ,
The auxiliary mixing device includes a rotation shaft provided so as to extend in a direction substantially orthogonal to the conveyance direction of the conveyance device, a plurality of agitators protruding in a radial direction of the rotation shaft, and the rotation shaft. soil improvement machine, characterized in that the configuration in the same direction as the transporting direction or in opposite directions by a drive means for selectively rotating the device. The rotating shaft of the auxiliary mixing device is a single rotating shaft,
When the rotating shaft is rotated in the same direction as the transport direction of the transport device by the drive means, the foreign matter in the soil to be reformed is advanced to the discharge device side by the stirring tool,
Wherein when said rotary shaft by the drive means is rotated in the direction opposite to the conveying direction of the conveying device is formed by a structure which disintegrated the clod of the reforming target in soil between the transport device and the mixing tool according Item 1. A soil conditioner according to item 1. The rotating shafts of the auxiliary mixing device are a plurality of rotating shafts arranged side by side in the transport direction of the transport device,
When each rotating shaft is rotated in the same direction as the transport direction of the transport device by the driving means, the foreign matter in the soil to be reformed is advanced to the discharge device side by the stirring tool,
Soil modifying machine according to the when the rotary shafts are rotated in opposite directions to each other is formed by a structure which disintegrated the clod of the reforming target in soil between each mixing tool according to claim 1 by the driving means.

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