JP2006241849A - Soil improvement machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a soil improvement machine capable of surely sending earth and sand thrown in a hopper to a transport device. <P>SOLUTION: Through-holes 25C, 26C and 27C are made in the left circumferential surface 25, the right circumferential surface 26 and the front circumferential surface 27 of the hopper 24, the insides of the circumferential surfaces 25, 26 and 27 are covered with the left flexible sheet 29, the right flexible sheet 31 and the front flexible sheet 33, pressure cylinders 35 pressing the flexible sheets 29, 31 and 33 are provided to the outside of the circumferential wall surfaces 25, 26 and 27 through the through-holes 25C, 26C and 27C. Even if earth and sand A thereby adhere to the upper surfaces of the flexible sheets 29, 31 and 33, rods 35B of the pressure cylinders 35 pressure the flexible sheets 29, 31 and 33 through the through-holes 25C, 26C and 27C to deform the flexible sheets 29, 31 and 33, and the earth and sand A adhering to the upper surface thereof are separated to surely send the earth and sand to the transport conveyor 8. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a soil improvement machine suitably used for improving the soil quality of construction generated soil and soft ground generated at a construction site such as civil engineering work.

  In general, in civil engineering work such as construction work and road construction, a large amount of construction generated soil is generated due to excavation work of earth and sand using a hydraulic excavator. And in order to reuse this construction generated soil as backfill material and foundation ground material, or to strengthen soft ground, improved soil is generated by adding and mixing soil improvement materials such as lime and cement to the soil. Soil improvement machines are known.

  Here, the soil condition improvement machine according to the prior art usually includes a hopper into which the soil to be improved (soil to be modified) is loaded, a transport device that transports the sand put into the hopper, and the transport device. Mixing tank into which the transported earth and sand and the soil conditioner are charged, a mixing device for mixing the earth and sand and the soil conditioner in the mixing tank to generate the improved soil, and an exhaust for discharging the generated improved soil It is roughly constituted by the device.

  Then, when the soil whose soil quality is to be improved is put into the hopper of the soil improvement machine using a hydraulic excavator or the like, the soil is transported to the mixing tank by the transport device, and the soil improvement material is put into the mixing tank. Is done. And the improved soil is produced | generated by stirring and mixing the earth and sand thrown into the mixing tank with a mixing device, and this improved soil is discharged | emitted by the discharge device to the exterior of a soil improvement machine.

  Here, the hopper of the soil improvement machine is usually formed by a frame-shaped peripheral wall surface, and at least an upper opening portion of the peripheral wall surface is an inclined surface inclined obliquely downward toward the transport device. Thus, the earth and sand thrown into the hopper can be smoothly sent out to the conveying device along the inclined surface of the hopper.

  However, when the soil whose soil quality is to be improved is clay, such as clay, the soil thrown into the hopper adheres to the inside of the inclined surface, so that the soil is directed toward the transport device. There is a problem that it cannot be sent out smoothly.

  On the other hand, a soil improvement machine has been proposed in which the inclined surface of the hopper is covered from the inside with a flexible sheet made of a material such as rubber or fluororesin. The soil improvement machine according to this prior art covers the inclined surface of the hopper with a flexible sheet, and transmits the vibration from the mixing device to the flexible sheet, so that the viscous earth and sand is put into the hopper. Even in such a case, the earth and sand can be reliably peeled off from the flexible sheet and smoothly sent out to the conveying device (see, for example, Patent Document 1).

JP 2001-73403 A

  However, the conventional soil improvement machine described above generates a large amount of earth and sand at once in the hopper, and when this earth and sand is pressed against the flexible sheet by its own weight, it occurs when the mixing device or the like operates. Even if the vibration to be transmitted is transmitted to the flexible sheet, there is a problem that it is difficult to reliably send the earth and sand adhering to the flexible sheet toward the transport device.

  The present invention has been made in view of the above-described problems of the prior art, and can reliably send out the sand put in the hopper toward the conveying device, thereby improving the productivity of the improved soil. The purpose is to provide an improved machine.

  In order to solve the above-described problems, the present invention provides a hopper formed by a frame-shaped peripheral wall surface for introducing earth and sand whose soil quality should be improved, a conveying device for conveying the earth and sand charged into the hopper, and the conveying device. It is applied to a soil improvement machine provided with a mixing device that mixes the earth and sand conveyed by the above and a soil improvement material to generate improved soil.

  The feature of the configuration adopted by the invention of claim 1 is that the hopper includes a through-hole penetrating the peripheral wall surface, a flexible sheet covering the inside of the peripheral wall surface, and an outer side of the peripheral wall surface. There is provided a sheet pressing means for pressing the sheet to the inside of the peripheral wall surface through the through hole.

  The invention of claim 2 is that the seat is configured as a fixed end whose upper end side is fixed to the peripheral wall surface of the hopper and whose lower end side is a free end movable along the peripheral wall surface of the hopper.

  The invention of claim 3 is that the sheet pressing means is constituted by a reciprocating actuator provided with a pressing member that presses the sheet through the through hole of the hopper.

  According to a fourth aspect of the present invention, the sheet pressing means includes a rotation actuator provided outside the peripheral wall surface of the hopper, a rotation-reciprocation conversion mechanism for converting the rotation motion of the rotation actuator into a reciprocation, and the rotation-reciprocation. It exists in having comprised with the press member attached to a motion conversion mechanism and pressing a sheet | seat through the through-hole of a hopper.

  According to the first aspect of the present invention, the sheet pressing means is configured to cover the inner surface of the peripheral wall surface constituting the hopper with the sheet, so that the sheet pressing means is provided with the hopper even if the viscous sand put in the hopper adheres to the upper surface of the sheet. By pressing the sheet from the outside to the inside of the peripheral wall surface through the through hole provided in the peripheral wall surface, the flexible sheet can be deformed, and the earth and sand adhering to the sheet can be peeled off from the sheet Can do. Therefore, even when a large amount of viscous earth and sand is put into the hopper, the earth and sand can be reliably sent out from the hopper to the conveying device, and the productivity of the improved earth can be increased.

  According to the invention of claim 2, since the upper end side of the sheet is fixed to the peripheral wall surface of the hopper and the lower end side of the sheet is configured as a free end, when the sheet is pressed through the through hole of the hopper by the sheet pressing means, When the lower end side moves along the peripheral wall surface of the hopper, the sheet can be raised in a mountain shape from the peripheral wall surface of the hopper. Thereby, the earth and sand adhering to a sheet | seat can be peeled, and it can send out reliably from a hopper to a conveying apparatus.

  According to the invention of claim 3, by operating the reciprocating actuator, the pressing member presses the sheet from the outside to the inside of the peripheral wall surface through the through hole, so that the sheet is raised from the peripheral wall surface of the hopper into a mountain shape. The earth and sand adhering to the sheet can be reliably peeled off.

  According to the invention of claim 4, when the rotary actuator is operated, the rotary motion of the rotary actuator is converted into the reciprocating motion by the rotary-reciprocating motion converting mechanism, and the pressing member attached to the rotary-reciprocating motion converting mechanism is The sheet is pressed from the outside to the inside of the peripheral wall surface through the through hole. Thereby, a sheet | seat can be raised in a mountain shape from the surrounding wall surface of a hopper, and the earth and sand adhering to this sheet | seat can be peeled reliably.

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

  First, FIG. 1 thru | or FIG. 10 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 to construction generated soil generated at a civil engineering work site, for example. To produce improved soil. And the soil improvement machine 1 is roughly comprised by the below-mentioned traveling body 2, the conveyance conveyor 8, the soil improvement material supply apparatus 11, the mixing tank 17, the paddle mixer 18, the discharge conveyor 20, the hopper 24, etc.

  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 of a travel lever 40 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 transport conveyor 8, a hopper 24 and the like are attached, and a soil improvement material supply device 11 and the like which are provided to rise upward in the middle of 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 to which a later-described building cover 38 and the like are attached form a strong support structure.

  Reference numeral 8 denotes a transfer conveyor as a transfer device located below the hopper 24, which will be described later, and attached to the front frame 7B. The transfer conveyor 8 is moved substantially horizontally from the lower side of the hopper 24 toward the mixing tank 17. , Extends backwards. Here, the conveyor 8 is attached to the front frame 7B and extends forward and backward, and is provided with a plurality of rollers. The conveyor 8 is guided by the rollers of the conveyor frame 9 and extends forward and backward. The belt 10 generally forms an endless track.

  Then, the conveyor 8 circulates the belt 10 along the conveyor frame 9 to load and convey the earth and sand A dropped from the hopper 24 on the belt 10, and the earth and sand A is continuously mixed into the mixing tank 17. To be put in.

  11 is a soil improvement material supply device attached to the intermediate frame 7C. The soil improvement material supply device 11 supplies soil improvement material B such as lime and cement to the soil A transported by the transport conveyor 8. is there. Here, as shown in FIG. 3, the soil conditioner supply device 11 includes a storage tank 12, a chute 14, a screw feeder 15, and the like, which will be described later.

  Reference numeral 12 denotes a storage tank that stores the soil improvement material B. The storage tank 12 is formed in a bellows shape that can be folded upward and downward by a stretchable material such as a polyethylene rubber material. Further, a flat top plate 12A having a substantially rectangular shape is provided on the upper end side of the storage tank 12, and the top plate 12A has an opening 12B for receiving the soil improvement material B and an opening 12B. , A cover body 12 </ b> C that covers the cover in a closable manner.

  On the other hand, on the intermediate frame 7C, four struts 13 are attached so as to be slidable upward and downward, surrounding the storage tank 12, and the corners of the top plate 12A of the storage tank 12 are attached by these struts 13. By supporting from the lower side, the bellows-like storage tank 12 is held in the extended state.

  Reference numeral 14 denotes a chute attached to the lower end side of the storage tank 12, and the chute 14 is formed in a substantially square-shaped funnel shape that gradually tapers from the upper end side toward the lower end side. Connected to the lower end of the tank 12, the lower end of the chute 14 is inserted into a casing 15A of a screw feeder 15 to be described later. And the chute | shoot 14 throws in the soil improvement material B stored in the storage tank 12 in the casing 15A.

  Reference numeral 15 denotes a screw feeder provided on the lower end side of the chute 14. The screw feeder 15 rotates in the casing 15A and a cylindrical casing 15A attached to the lower end side of the chute 14, as shown in FIG. The screw shaft 15 </ b> B that can be provided is generally configured.

  Here, the casing 15 </ b> A extends forward and rearward while being inclined obliquely upward from the lower end side of the chute 14 toward the transport conveyor 8. An introduction port 15C into which the lower end of the chute 14 is inserted is formed on the upper surface side of the rear portion of the casing 15A. The introduction port 15C introduces the soil improvement material B introduced from the chute 14 into the casing 15A. To do. Further, a lead-out port 15D that opens to the rear upper surface side of the conveyor 8 (belt 10) is formed on the front lower surface side of the casing 15A, and the lead-out port 15D allows the soil quality improving material B to pass through the soil A on the belt 10. Is derived from

  Further, the screw shaft 15B rotatably provided in the casing 15A is provided with spiral blades on the outer peripheral side thereof, and is rotated in the casing 15A by a drive motor 15E such as a hydraulic motor.

  Then, the screw feeder 15 rotates the screw shaft 15B in the casing 15A by the drive motor 15E, thereby sending the soil improvement material B introduced into the casing 15A from the introduction port 15C forward by the screw shaft 15B. Then, it is dropped downward through the outlet 15D of the casing 15A. Thus, an appropriate amount of the soil quality improving material B is continuously supplied to the earth and sand A conveyed by the conveyor 8.

  Reference numeral 16 denotes a crane device that transports the soil improvement material B into the storage tank 12, and the crane device 16 is positioned on the right side of the soil improvement material supply device 11 and stands on the base frame 7A as shown in FIG. It is installed. And the crane apparatus 16 lifts the soil improvement material (not shown) packed in the bag upwards, for example, and conveys it in the storage tank 12. FIG.

  Reference numeral 17 denotes a mixing tank located on the lower side of the screw feeder 15 and attached to the base frame 7A. The mixing tank 17 is formed in a box shape extending in the front and rear directions as shown in FIG. The earth and sand A conveyed by 8 and the soil quality improving material B supplied from the screw feeder 15 are put together. For this reason, on the upper surface side of the front part of the mixing tank 17, a loading port 17 </ b> A into which the earth and sand A conveyed by the conveying conveyor 8 and the soil quality improving material B supplied from the screw feeder 15 are charged is formed.

  A paddle mixer 18 (described later) is provided in the mixing tank 17, and the soil A and the soil quality improving material B introduced into the mixing tank 17 are stirred and mixed by the paddle mixer 18, thereby improving the soil in the mixing tank 17. C is generated. Further, on the rear side of the mixing tank 17, a discharge port 17 </ b> B for discharging the improved soil C generated in the mixing tank 17 toward a discharge conveyor 20 described later is formed.

  Reference numeral 18 denotes a left and right two paddle mixers (only one is shown) as a mixing device rotatably provided in the mixing tank 17, and the paddle mixer 18 moves forward in the mixing tank 17 as shown in FIG. A plurality of paddles 18A projecting outward in the radial direction are provided on the outer peripheral side of the shaft body extending in the rearward direction.

  The left and right paddle mixers 18 are rotated in opposite directions in the mixing tank 17 by the drive motor 19, and the earth and sand A and the soil conditioner B introduced into the mixing tank 17 are stirred and mixed by the paddles 18A. By doing so, the improved soil C is generated. At this time, each paddle 18A stirs and mixes the earth and sand A and the soil conditioner B in the mixing tank 17 to generate the improved soil C, and the generated improved soil C is directed to the outlet 17B of the mixing tank 17. It is configured to send out.

  Reference numeral 20 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 17. The discharge conveyor 20 is an improved soil C generated in the mixing tank 17. Is discharged to the outside of the soil improvement machine 1.

  Here, the discharge conveyor 20 is attached to the base frame 7A and the like, extends in the front and rear directions, and is disposed on the lower side of the mixing tank 17 at the front side and the conveyor frame 21 with the rear side inclined obliquely upward, The belt 22 is generally constituted by a belt 22 that forms an endless track extending in the forward and backward directions by being guided by a plurality of rollers provided in the conveyor frame 21, and a drive motor 23 that drives the belt 22.

  The discharge conveyor 20 circulates the belt 22 along the conveyor frame 21 to load the improved soil C discharged from the discharge port 17B of the mixing tank 17 on the belt 22 and to the rear side of the soil improvement machine 1 The improved soil C is continuously discharged out of the soil improvement machine 1.

  Reference numeral 24 denotes a hopper positioned on the upper side of the conveyor 8 and attached to the front frame 7B. The hopper 24 includes a left peripheral wall surface 25 formed of a steel plate or the like, as shown in FIGS. The peripheral wall surface 26, the front peripheral wall surface 27, and the rear peripheral wall surface 28 are configured in a frame shape, and the earth and sand A to be improved in soil quality is input. The upper end side of the hopper 24 is a rectangular opening extending in the front and rear directions, and the lower end side of the hopper 24 is a rectangular opening narrower than the belt 10 of the transport conveyor 8. Therefore, the earth and sand A introduced into the hopper 24 from the upper opening is loaded on the belt 9 of the conveyor 8 through the lower opening.

  Here, the left peripheral wall surface 25 constitutes an upper opening portion of the hopper 24 and is inclined leftward and downward from the lower end side of the left inclined surface 25A. And a left vertical surface 25B that constitutes the opening portion. Further, the right peripheral wall surface 26 constitutes an upper opening portion of the hopper 24 and has a right inclined surface 26A inclined obliquely downward toward the transfer conveyor 8, and a lower side of the hopper 24 that hangs down from the lower end side of the right inclined surface 26A. It is comprised by the right vertical surface 26B which comprises an opening part.

  Further, the front peripheral wall surface 27 constitutes an upper opening portion of the hopper 24 and has a front inclined surface 27A inclined obliquely downward toward the transport conveyor 8, and a lower side of the front inclined surface 27A. It is comprised by the front vertical surface 27B which comprises the opening part of the side. Furthermore, the rear peripheral wall surface 28 closes the rear end portions of the left inclined surface 25A and the right inclined surface 26A and closes the rear end portions of the upper vertical surface 28A extending in the vertical direction and the left vertical surface 25B and the right vertical surface 26B. And a lower vertical surface 28 </ b> B extending in the vertical direction.

  25C, 25C,... Are a plurality of through holes formed in the left inclined surface 25A constituting the left peripheral wall surface 25. Each of the through holes 25C penetrates the left inclined surface 25A upward and downward, and will be described later. Is closed by the adhesive sheet 29. 26C, 26C,... Are a plurality of through holes formed in the right inclined surface 26A constituting the right peripheral wall surface 26. Each through hole 26C penetrates the right inclined surface 26A upward and downward, and will be described later. It is closed by the flexible sheet 31. Further, 27C, 27C,... Are a plurality of through holes formed in the front inclined surface 27A constituting the front peripheral wall surface 27. Each through hole 27C penetrates the front inclined surface 27A upward and downward, and will be described later. The front flexible sheet 33 is closed.

  Reference numeral 29 denotes a left flexible sheet that covers the inside of the left peripheral wall surface 25 constituting the hopper 24. The left flexible sheet 29 is made of a flexible material such as rubber, a resin material, or a woven cloth. It is formed in a substantially trapezoidal flat plate shape and covers the left inclined surface 25A from above, thereby closing each through hole 25C formed in the left inclined surface 25A. Here, as shown in FIGS. 5 and 7 and the like, the upper end side of the left flexible sheet 29 is a fixed end sandwiched between a belt-like sheet fixing plate 30 extending in the front and rear directions and the left inclined surface 25A. 29A, and the lower end side of the left flexible sheet 29 is a free end 29B that can move upward and downward along the left inclined surface 25A.

  31 is a right flexible sheet that covers the inside of the right peripheral wall surface 26 that constitutes the hopper 24. The right flexible sheet 31 is also substantially made of a flexible material such as rubber, a resin material, or a woven fabric. It is formed in a trapezoidal flat plate shape, and closes each through hole 26C by covering the right inclined surface 26A from above. Here, the upper end side of the right flexible sheet 31 is a fixed end 31 </ b> A sandwiched between the belt-shaped sheet fixing plate 32 extending in the front and rear directions and the right inclined surface 26 </ b> A, and the lower end of the right flexible sheet 31. The side is a free end 31B that is movable upward and downward along the right inclined surface 26A.

  Reference numeral 33 denotes a front flexible sheet that covers the inside of the front peripheral wall surface 27 that constitutes the hopper 24. The front flexible sheet 33 is also substantially made of a flexible material such as rubber, resin material, or woven cloth. It is formed in the shape of a flat plate having a trapezoidal shape, and closes each through hole 27C by covering the front inclined surface 27A from above. Here, the upper end side of the front flexible sheet 33 is a fixed end 33A sandwiched between a belt-like sheet fixing plate 34 extending in the left and right directions and the front inclined surface 27A. The lower end side is a free end 33B that can move upward and downward along the front inclined surface 27A.

  35, 35,... Are a plurality of pressing cylinders (reciprocating actuators) as sheet pressing means provided outside the peripheral wall surfaces 25, 26, 27 constituting the hopper 24. A lower side of the two through holes 25C formed in the inclined surface 25A, a lower side of the two through holes 26C formed in the right inclined surface 26A, and a single through hole 27C formed in the front inclined surface 27A. A total of five are provided on the lower side.

  Here, the pressing cylinder 35 is constituted by, for example, a hydraulic cylinder, and as shown in FIGS. 6 to 9, a tube 35A attached to the front frame 7B supporting the hopper 24 via a bracket 36, and the inside of the tube 35A. And a rod 35B as a pressing member that is fixed to the piston and that expands and contracts (reciprocates) with respect to the tube 35A.

  Then, as shown in FIG. 8, the pressing cylinder 35 provided outside the left inclined surface 25A causes the rod 35B to be retracted outside the left inclined surface 25A by contracting the rod 35B into the tube 35A. As shown, the rod 35B is extended from the tube 35A to project the rod 35B to the inside of the left inclined surface 25A through the through hole 25C.

  Here, when the rod 35B of the pressing cylinder 35 extends, the rod 35B presses the left flexible sheet 29 to the inside of the left inclined surface 25A through the through hole 25C. As a result, the free end 29B of the left flexible sheet 29 moves upward along the left inclined surface 25A, and the left flexible sheet 29 can be deformed so as to protrude from the left inclined surface 25A into a mountain shape. Thus, the striking force can be directly applied to the earth and sand A attached to the upper surface side of the left flexible sheet 29 from the lower surface side of the left flexible sheet 29 by the rod 35B, and The upper and lower surfaces of the flexible sheet 29 (the surface to which the earth and sand A adheres) can be stretched and deformed, so that the earth and sand A can be reliably peeled from the left flexible sheet 29. It is the structure which can be reliably sent out on the belt 10 of the conveyance conveyor 8 through an opening part.

  Similarly, the rod 35B of the pressing cylinder 35 provided on the outer side of the right inclined surface 26A presses the right flexible sheet 31 to the inner side of the right inclined surface 26A through the through hole 26C. The earth and sand A adhering to the upper surface of the flexible sheet 31 can be reliably peeled off. Further, the rod 35B of the pressing cylinder 35 provided outside the front inclined surface 27A presses the front flexible sheet 33 to the inside of the front inclined surface 27A through the through hole 27C, whereby the front flexible sheet The earth and sand A adhering to the upper surface of 33 can be reliably peeled off.

  As shown in FIG. 10, among the through holes 25C drilled in the left inclined surface 25A, the push-up rod 37 gripped by the operator is inserted into the through hole 25C where the pressing cylinder 35 is not disposed. The left flexible sheet 29 can be pressed by the push-up bar 37. Similarly, the through hole 26C in which the pressing cylinder 35 is not disposed among the through holes 26C of the right inclined surface 26A, and the through hole in which the pressing cylinder 35 is not disposed among the through holes 27C of the front inclined surface 27A. The push-up rod 37 gripped by the operator is also inserted into the 27C.

  1 and 2 is a building cover provided on the rear frame 7D. Inside the building cover 38 is an engine, a hydraulic pump driven by the engine, etc. (none of which are shown). 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.

  39 is a driver's cab provided in the vicinity of the building cover 38, and 40 is a travel lever disposed on the driver's cab 39. An operator who has entered the driver's cab 39 operates the travel lever 40 to adjust the travel body 2. By driving the left and right crawlers 6, 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 39 of the soil improvement machine 1 and operates the travel lever 40 of the cab 39. 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 16, and this soil improvement material B is supplied to the soil improvement material supply device. 11 into the storage tank 12.

  At this time, the bag filled with the soil improvement material B is torn by a cutter (not shown) provided in the storage tank 12, and the storage tank 12 has a powdery soil improvement as shown in FIG. Material B is stored. Then, the soil improvement material B in the storage tank 12 is introduced into the casing 15 </ b> A of the screw feeder 15 through the chute 14.

  On the other hand, the soil A is put into the hopper 24 of the soil improvement machine 1 using a hydraulic excavator or the like (not shown). Thereby, as shown in FIG. 3, the earth and sand A are guided from the upper opening of the hopper 24 to the lower opening, and fall onto the belt 10 of the transport conveyor 8 through the lower opening.

  And the earth and sand A which fell on the belt 10 of the conveyance conveyor 8 is conveyed by the belt 10 to the mixing tank 17. FIG. Further, the soil quality improving material B introduced into the casing 15A of the screw feeder 15 is sent to the outlet 15D of the casing 15A by the screw shaft 15B, and is sent to the earth and sand A conveyed by the conveyor 8 from the outlet 15D. Supplied.

  Thus, the soil improvement material B is added to the earth and sand A conveyed by the conveyor 8 before the mixing tank 17, and these earth and sand A and the soil quality improvement material B are put together into the mixing tank 17. The

  At this time, since the two paddle mixers 18 are rotating in the mixing tank 17, the earth and sand A and the soil conditioner B introduced into the mixing tank 17 are agitated and mixed by the paddles 18 </ b> A of the respective paddle mixers 18. . Thereby, in the mixing tank 17, the improved soil C in which the earth and sand A and the soil conditioner B are appropriately mixed is generated, and this improved soil C is discharged from the outlet 17B of the mixing tank 17 by the paddle 18A of each paddle mixer 18. Is sent to.

  And the improved soil C produced | generated in the mixing tank 17 falls on the belt 22 of the discharge conveyor 20 from the discharge port 17B, and is discharged | emitted outside the soil improvement machine 1 by being conveyed by this belt 22. .

  In this way, by performing a series of soil improvement work using the soil improvement machine 1, improved soil suitable for use as a backfill material, foundation ground material, etc. from construction generated soil generated by civil engineering work, etc. C can be produced.

  Here, in the present embodiment, even when the earth and sand A having viscosity is put into the hopper 24, the earth and sand A can be reliably sent from the hopper 24 to the conveyor 8. The case where the soil A having viscosity is put into the hopper 24 will be described.

  First, when a large amount of viscous earth and sand A is put into the hopper 24, the earth and sand A adheres to the upper surfaces of the flexible sheets 29, 31, and 33 by their own weight. In this case, by operating the pressing cylinders 35 provided outside the peripheral wall surfaces 25, 26, and 27 constituting the hopper 24, as shown in FIGS. The rod 35B is expanded and contracted.

  Thereby, the rod 35B of the pressing cylinder 35 provided outside the left peripheral wall surface 25 presses the left flexible sheet 29 to the inside of the left inclined surface 25A through the through hole 25C, and the left flexible sheet 29 is moved to the left inclined surface. It can deform | transform so that it may protrude from 25A in a mountain shape. As a result, a striking force can be applied directly to the earth and sand A attached to the upper surface of the left flexible sheet 29 from the lower surface side of the left flexible sheet 29 by the rod 35B, and the left flexible sheet By expanding and contracting and deforming the upper surface of the sheet 29 (the surface on which the earth and sand A adheres), the earth and sand A can be reliably peeled from the left flexible sheet 29. Thus, even if the earth and sand A adheres to the upper surface of the left flexible sheet 29, the earth and sand A is surely peeled off from the left flexible sheet 29, and the conveyance conveyor 8 passes through the opening on the lower side of the hopper 24. It can be sent out on the belt 10.

  Similarly, the rod 35B of the pressing cylinder 35 provided on the outer side of the right peripheral wall surface 26 presses the right flexible sheet 31 to the inner side of the right inclined surface 26A through the through hole 26C. The earth and sand A adhering to the adhesive sheet 31 can be peeled off, and the rod 35B of the pressing cylinder 35 provided outside the front peripheral wall surface 27 causes the front flexible sheet 33 to go inside the front inclined surface 27A through the through hole 27C. The earth and sand A adhering to the front flexible sheet 33 can be peeled off by pressing and the right flexible sheet 31 and the earth and sand A peeled from the front flexible sheet 33 are placed under the hopper 24. It can be reliably sent out onto the belt 10 of the conveyor 8 through the opening.

  As shown in FIG. 10, the operator appropriately inserts a push-up rod 37 into the through-hole 25C in which the pressing cylinder 35 is not disposed among the respective through-holes 25C of the left inclined surface 25A. By pressing the left flexible sheet 29, the earth and sand A adhering to the left flexible sheet 29 can be peeled off. Similarly, a push-up bar 37 is appropriately inserted into each through-hole 26C of the right inclined surface 26A and each through-hole 27C of the front inclined surface 27A, and the right flexible sheet 31 and the front By pressing the flexible sheet 33, the earth and sand A adhering to each of the flexible sheets 31 and 33 can be peeled off.

  Thus, according to the present embodiment, the through holes 25C, 26C, and 27C are provided in the left peripheral wall surface 25, the right peripheral wall surface 26, and the front peripheral wall surface 27 that constitute the hopper 24, and the inside of each peripheral wall surface 25, 26, and 27 is provided. Are covered with the left flexible sheet 29, the right flexible sheet 31, and the front flexible sheet 33, and the flexible sheets 29, 26C, 27C are formed outside the peripheral wall surfaces 25, 26, 27 through the through holes 25C, 26C, 27C. A pressing cylinder 35 that presses 31 and 33 is provided.

  As a result, even if the viscous sand A that has been put into the hopper 24 adheres to the upper surfaces of the flexible sheets 29, 31, 33, the rod 35B of the pressing cylinder 35 can pass through the through holes 25C, 26C, 27C. By pressing the flexible sheets 29, 31, 33, the flexible sheets 29, 31, 33 can be deformed and the earth and sand A adhering to the upper surface can be reliably peeled off. Accordingly, even when a large amount of viscous earth and sand A is introduced into the hopper 24, the earth and sand A can be reliably delivered from the hopper 24 toward the belt 10 of the transport conveyor 8, and the productivity of the improved earth C is improved. Can be increased.

  Further, since the operator can eliminate the troublesome work of removing the earth and sand A attached to the flexible sheets 29, 31, and 33 using a scoop or the like on the hopper 24 having a poor footing, the soil conditioner 1 can be used. Workability and safety of the used work can be improved.

  Next, FIG. 11 to FIG. 15 show a second embodiment of the present invention. The feature of the present embodiment is that the sheet pressing means is a rotary actuator and a rotation that converts the rotary motion of the rotary actuator into a reciprocating motion. -It has comprised by the reciprocating motion conversion mechanism and the press member attached to the rotation-reciprocating motion converting mechanism. 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, reference numerals 41, 41,... Denote a plurality of sheet pressing devices as sheet pressing means provided on the outer sides of the peripheral wall surfaces 25, 26, 27 constituting the hopper 24. Instead of the pressing cylinder 35 according to the embodiment, the present embodiment is used. As shown in FIGS. 13 to 15, the sheet pressing device 41 includes a motor 43, a link mechanism 44, a rod 45, and the like which will be described later.

  Reference numeral 42 denotes a bracket attached to the front frame 7B that supports the hopper 24. The bracket 42 includes a horizontal plate portion 42A protruding leftward and rightward from the front frame 7B, and upward from a middle portion of the horizontal plate portion 42A. And a vertical plate portion 42B that rises. A motor 43 described later is attached to the protruding end side of the horizontal plate portion 42A, and a cylindrical portion 42C into which a rod 45 described later is slidably fitted is formed on the upper end side of the vertical plate portion 42B. ing.

  Reference numeral 43 denotes a motor as a rotary actuator attached to the protruding end side of the horizontal plate portion 42A constituting the bracket 42. The motor 43 is constituted by, for example, a hydraulic motor, and the peripheral wall surfaces 25, 26, 27 is disposed outside. The output shaft 43A of the hydraulic motor 43 is configured such that a proximal end side of a first link 44A described later is fixed.

  Reference numeral 44 denotes a link mechanism as a rotation-reciprocation conversion mechanism that converts the rotation of the motor 43 into a reciprocation of the rod 45 described later. The link mechanism 44 has a first end fixed to the output shaft 43A of the motor 43 at the base end side. The link 44 </ b> A and the second link 44 </ b> B having a proximal end pin-pinned to the distal end side of the first link 44 </ b> A and a distal end side pin-coupled to the lower end side of the rod 45 are configured.

  Reference numeral 45 denotes a rod as a pressing member attached to the link mechanism 44. The rod 45 is made of a cylindrical steel bar or the like, and is inserted into the cylindrical portion 42C of the bracket 42 so as to be slidable upward and downward. Yes. Further, the tip end side of the second link 44 </ b> B constituting the link mechanism 44 is pin-coupled to the lower end side of the rod 45.

  Therefore, when the output shaft 43A of the motor 43 rotates, the rotation of the motor 43 (output shaft 43A) is transmitted to the rod 45 by the link mechanism 44, and the rod 45 is attached to the bracket 42 as shown in FIGS. It is configured to move (reciprocate) continuously upward and downward along the cylindrical portion 42C.

  The soil improvement machine according to the present embodiment has a configuration in which the sheet pressing device 41 as described above is provided outside the peripheral wall surfaces 25, 26, and 27 constituting the hopper 24. Hereinafter, the operation of the sheet pressing device 41 will be described. Will be described.

  First, when the earth and sand A adheres to the upper surfaces of the flexible sheets 29, 31 and 33 provided in the hopper 24 by putting the clay and sand A having viscosity into the hopper 24, the motor of the sheet pressing device 41. 43 (output shaft 43A) is rotated. As a result, the rotation of the motor 43 is transmitted to the rod 45 by the link mechanism 44, and the rod 45 continuously moves upward and downward along the cylindrical portion 42C of the bracket 42 as shown in FIGS. (Reciprocating).

  Thereby, the rod 45 can press the left flexible sheet 29 to the inside of the left inclined surface 25A through the through-hole 25C, and the left flexible sheet 29 can be deformed so as to protrude from the left inclined surface 25A into a mountain shape. The earth and sand A can be reliably peeled from the left flexible sheet 29. Thus, even if the earth and sand A adheres to the upper surface of the left flexible sheet 29, the earth and sand A is surely peeled off from the left flexible sheet 29, and the conveyance conveyor 8 passes through the opening on the lower side of the hopper 24. The belt 10 can be reliably fed out.

  Similarly, the rod 45 of the sheet pressing device 41 provided outside the right peripheral wall surface 26 is attached to the right flexible sheet 31 by pressing the right flexible sheet 31 through the through hole 26C. The earth and sand A can be peeled off, and the rod 45 of the sheet pressing device 41 provided outside the front peripheral wall surface 27 presses the front flexible sheet 33 through the through-hole 27C. The adhering earth and sand A can be peeled off, and the earth and sand A peeled off from the right flexible sheet 31 and the front flexible sheet 33 is sent out onto the belt 10 of the transport conveyor 8 through the lower opening of the hopper 24. be able to.

  Thus, also in the present embodiment, the rod 45 of the sheet pressing device 41 is inserted into the through-hole even if the viscous earth and sand A introduced into the hopper 24 adheres to the upper surfaces of the flexible sheets 29, 31 and 33. By pushing up the flexible sheets 29, 31, 33 from below through 25C, 26C, 27C, the flexible sheets 29, 31, 33 are deformed, and the earth and sand A adhering to the upper surface is reliably peeled off. Can do. Accordingly, even when a large amount of viscous earth and sand A is introduced into the hopper 24, the earth and sand A can be smoothly sent out from the hopper 24 toward the transport conveyor 8, and the productivity of the improved earth C can be increased. Can do.

  In each embodiment mentioned above, each peripheral wall surface 25, 26, and 27 which constitutes hopper 24 is formed using a steel plate etc., and inclined surface 25A, 26A, and 27A of each peripheral wall surface 25, 26, and 27 is formed. The case where a plurality of through holes 25C, 26C, and 27C are formed is illustrated. However, the present invention is not limited to this. For example, as in the modification shown in FIG. 16, each of the peripheral wall surfaces 25 ', 26', 27 is formed using, for example, a grating steel plate having a lattice-like through hole (gap). 'May be formed.

  In each of the above-described embodiments, the left peripheral wall surface 25 of the hopper 24 is configured by the left inclined surface 25A and the left vertical surface 25B, and the right peripheral wall surface 26 is configured by the right inclined surface 26A and the right vertical surface 26B. The case where the surrounding wall surface 27 is comprised by 27 A of front inclined surfaces and the front vertical surface 27B is illustrated. However, the present invention is not limited to this. For example, each of the peripheral wall surfaces 25, 26, and 27 may be configured only by the inclined surfaces 25A, 26A, and 27A.

  Moreover, in each embodiment mentioned above, the case where the upper end side of the left flexible sheet | seat 29 is made into the fixed end 29A and the lower end side is made into the free end 29B is illustrated. However, the present invention is not limited to this, and the upper and lower ends of the left flexible sheet 29 are fixed to the left peripheral wall surface 25 of the hopper 24 as in another modification shown in FIG. It is good also as a structure used as the fixed ends 29A and 29C. The same applies to the right flexible sheet 31 and the front flexible sheet 33.

  Further, in each of the above-described embodiments, the left flexible sheet 29, the right flexible sheet 31, and the front are individually provided for the left peripheral wall surface 25, the right peripheral wall surface 26, and the front peripheral wall surface 27 that constitute the hopper 24. The case where the flexible sheet | seat 33 is provided is illustrated. However, the present invention is not limited to this. For example, a single flexible sheet in which these flexible sheets are integrated is formed, and the left peripheral wall surface 25 and the right peripheral wall surface 26 are formed by the single flexible sheet. The front peripheral wall surface 27 may be covered from the inside.

  In addition, by forming each flexible sheet 29, 31, 33 as a transparent sheet made of, for example, vinyl resin, the inside of the hopper 24 through the through holes 25C, 26C, 27C of the peripheral wall surfaces 25, 26, 27. You may comprise so that it can see through.

  In the second embodiment described above, the link mechanism 44 is exemplified as a rotation-reciprocation conversion mechanism that converts the rotation of the motor 43 into the reciprocation of the rod 45. However, the present invention is not limited to this, and the rotation-reciprocating motion conversion mechanism may be configured by other mechanisms such as a crankshaft and a cam.

  Furthermore, in the first embodiment described above, a case where a total of five pressing cylinders 35 as sheet pressing means are provided outside the peripheral wall surfaces 25, 26, 27 constituting the hopper 24 is illustrated. However, the present invention is not limited to this. For example, one to four, or six or more pressing cylinders 35 may be provided. The same applies to the sheet pressing device 41 according to the second embodiment.

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 the hopper, conveyance conveyor, mixing apparatus, etc. in FIG. It is a disassembled perspective view which shows a hopper, a flexible sheet | seat, etc. It is an enlarged plan view which expands and shows the hopper in FIG. It is the front view which looked at the hopper, the conveyance conveyor, the press cylinder, etc. from the arrow VI-VI direction in FIG. It is sectional drawing which looked at the hopper, the flexible sheet | seat, the press cylinder, etc. from the arrow VII-VII direction in FIG. It is the expanded sectional view which expanded the hopper, flexible sheet | seat, press cylinder, etc. in FIG. It is an expanded sectional view similar to FIG. 8 which shows the state which pressed the flexible sheet | seat with the press cylinder. It is an expanded sectional view which shows the state which pressed the flexible sheet | seat with the raising stick inserted in the through-hole. It is a front view similar to FIG. 6 which shows the hopper, conveyance conveyor, sheet press apparatus, etc. by 2nd Embodiment. It is sectional drawing which looked at the hopper, the flexible sheet | seat, the sheet press apparatus, etc. from the arrow XII-XII direction in FIG. It is the expanded sectional view which expanded the hopper, flexible sheet | seat, sheet | seat press apparatus, etc. in FIG. It is an expanded sectional view similar to FIG. 13 which shows the state which the sheet press apparatus started pressing the flexible sheet. It is an expanded sectional view similar to FIG. 13 which shows the state which pressed the flexible sheet with the sheet | seat pressing apparatus. It is a disassembled perspective view similar to FIG. 4 which shows the modification of a hopper. It is an expanded sectional view similar to FIG. 8 which shows the modification of a flexible sheet | seat.

Explanation of symbols

2 Running body 8 Conveyor (conveyor)
11 Soil improvement material supply device 17 Mixing tank 18 Paddle mixer (mixing device)
20 Discharge conveyor 24 Hopper 25, 25 'Left peripheral wall surface 25C, 26C, 27C Through hole 26, 26' Right peripheral wall surface 27, 27 'Front peripheral wall surface 29 Left flexible sheet (sheet)
29A, 29C, 31A, 33A Fixed end 29B, 31B, 33B Free end 31 Right flexible sheet (sheet)
33 Front flexible sheet (sheet)
35 Pressing cylinder (sheet pressing means, reciprocating actuator)
35A Tube 35B Rod (Pressing member)
41 Sheet pressing device (sheet pressing means)
43 Motor (rotary actuator)
44 Link mechanism (rotation-reciprocating motion conversion mechanism)
45 Rod (Pressing member)

Claims (4)

A hopper formed by a frame-shaped peripheral wall surface for introducing soil to improve soil quality, a transport device for transporting the soil put into the hopper, and the soil and soil quality improving material transported by the transport device A soil improvement machine comprising a mixing device for producing improved soil by mixing
The hopper includes a through hole that penetrates the peripheral wall surface, a flexible sheet that covers the inside of the peripheral wall surface, and an inner side of the peripheral wall surface that is disposed on the outside of the peripheral wall surface through the through hole. A soil improvement machine characterized by comprising a sheet pressing means for pressing the sheet.   The soil improvement machine according to claim 1, wherein the sheet has a fixed end fixed at the upper end side to the peripheral wall surface of the hopper and the lower end side as a free end movable along the peripheral wall surface of the hopper.   The soil improvement machine according to claim 1 or 2, wherein the sheet pressing means is constituted by a reciprocating actuator provided with a pressing member that presses the sheet through the through-hole of the hopper.   The sheet pressing means is attached to the rotary actuator provided outside the peripheral wall surface of the hopper, the rotation-reciprocation conversion mechanism for converting the rotation motion of the rotation actuator into a reciprocation, and the rotation-reciprocation conversion mechanism. The soil improvement machine according to claim 1 or 2, comprising a pressing member that presses the sheet through a through hole of the hopper.

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