JP2001032320A - Soil-improvement material feeder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent compression and solidification of a soil improvement material inside even when a large storage tank, in which a large amount of the soil improvement material can be stored for reducing the supply frequency of the soil improvement material, is used as a soil-improvement material feeder. SOLUTION: An in-hopper agitating means 44 is installed in the lower tank section 35 of a storage tank 33. The in-hopper agitating means 44 is composed of a device in which a plurality of main agitating blades 46 are mounted on a shaft 45, ring-shaped holding members 48 are fixed and set up among the front end sections of the main agitating blades 46, and a plurality of auxiliary agitating blades 49 are fitted to the holding members 48. An inclined partition wall 51 for partitioning the inside of the storage tank 33 into an upper storage region and a lower storage region is installed between the lower tank section 35 and a bellows section 37, and has a guide surface inclined to an oblique lower section towards a center from a connection section to the lower tank section 35, a passage section 51a opened in fixed size is formed at a central section, and an opening 50 for supplying a soil improvement material is arranged at the lower section of the inclined partition wall 51.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a machine for improving the quality of earth and sand to meet a predetermined purpose, for example, for improving soft ground and strengthening the ground. The present invention relates to a soil improving material supply device for supplying a soil improving material such as the above.

[0002]

2. Description of the Related Art For example, in burial of gas pipes, water and sewage works and other road works, foundation works, etc., it is desirable to backfill soil generated by excavation, but since generated soil is not suitable for backfilling. Then, the excavated soil is carried out and new high quality soil is carried in to fill the excavated area. For example,
If the soil itself is soft, such as clayey soil with extremely small particle size and high viscosity, or soil that is too hard to solidify due to excessive weathering, land subsidence, etc. May occur. However, since the poor soil generated by excavation at a construction site is a kind of industrial waste, its disposal place is restricted. Therefore, there is a strong need to convert poor soil into reusable resources. In this way, in order to make it possible to reuse soft soil and the like that may cause land subsidence when the soil generated by excavation is backfilled, for example, soil that mainly contains lime or cement The improver is mixed with earth and sand and solidified. As a result, it is possible to convert the soil into high-quality soil that is suitably used for backfilling an excavated site.

[0003] The soil improvement treatment for solidifying the soil is performed by mixing the soil and the soil improvement material. The mixing of the soil and the soil improvement material is performed in a stirring vessel provided with stirring means having a predetermined structure. Do with. Here, the soil improvement processing method can be roughly classified into a batch processing method and a continuous processing method. In the batch type treatment, a predetermined amount of earth and sand and a soil improvement material are supplied into a stirring vessel provided with a stirring means, and the inside of the vessel is sufficiently stirred to produce a fixed quantity of improved soil. On the other hand, in the continuous processing method, the earth and sand and the soil improving material are continuously supplied to the mixer, and the process of mixing the soil and the soil improving material in the mixer is continuously performed. The obtained improved soil is continuously discharged from the mixer. Here, the mixing method of the earth and sand and the soil improvement material by the continuous processing method includes a mixing method,
A crushing method or the like has been put to practical use. The mixing method is unique in that the earth and sand and the soil improvement material are mixed by stirring means in a mixer and transferred to the discharge section side.The disintegration method uses a disintegrator equipped with a rotary striker, While the improvement material is dropped from a high place in the crushing machine, a blow is applied by a rotary blower to crush the soil and mix the soil and the soil improvement material.

[0004] Regardless of whether the mixing method is adopted or the crushing method is used, when soil improvement is performed by continuous processing, the sand and the soil improving material are continuously supplied as a mixer or a crusher. There must be. For example, when the soil quality is improved by a plant method, the soil and sand that have been piled up at a predetermined deposition site or the like are used. Further, when the soil quality is directly improved at the excavation work site, the soil generated by the excavation is supplied as it is. Therefore, since the earth and sand can be supplied to the mixer or the like directly using a machine such as a hydraulic shovel or via a belt conveying means or the like, the operation of supplying the earth and sand can be continuously performed.

On the other hand, the soil improving material is usually packed in a bag by a flexible container or the like, and is supplied to the mixer or the like from the flexible container. The soil improving material is added to the earth and sand. Yes, the amount depends on the supply of earth and sand. Therefore, in order to produce a high quality soil, it is necessary to control the supply of the soil improvement material. In addition, the soil improvement material scatters around and does not pollute the surrounding environment, and does not absorb moisture etc. at the stage before mixing with earth and sand, etc.
From the viewpoint of handling, it is common to use a storage tank and a feeder which are kept in a substantially sealed state in order to store the soil improvement material, and supply the mixture to a mixer or the like from the storage tank via a feeder. By providing the feeder with a supply amount control function, the soil improving material can be supplied from the feeder according to the supply amount of the earth and sand so as to have a required mixing ratio. Therefore, the supply amount of the soil conditioner is limited, and the soil conditioner must be replenished when the storage tank is empty. In this replenishment work, the lid provided at the upper part of the storage tank is opened, and the soil improving material is supplied from the flexible container into the storage tank, but the flexible container filled with the soil improving material is extremely large in size and weight. Therefore, it is usually suspended in a crane and supplied into the storage tank. Therefore, the work of replenishing the soil improvement material into the storage tank requires a considerable amount of time and labor, and during this time, the soil improvement processing is usually stopped.

[0006]

As described above, the operation efficiency of the soil improvement machine largely depends on the volume of the storage tank for supplying the soil improvement material. In other words, if the capacity of the storage tank is small, frequent replenishment of the soil improving material must be performed, so that the interruption time of the treatment is prolonged. Therefore, in consideration of the processing efficiency and the like, it is desirable that the capacity of the storage tank be as large as possible so that a large amount of soil improvement material can be stored. Here, it is necessary to stir the inside of the storage tank in order to reliably and smoothly feed the soil improvement material from the storage tank having a large volume to the feeder.

When a large amount of soil improvement material is stored in a storage tank and the soil improvement material is added to the earth and sand while stirring the storage tank, the material of the soil improvement material is In some cases, as described with reference to FIG. 27, inconveniences such as the solidification in the storage tank and the supply becoming impossible occur. In particular, in the case where lime or the like is used as a solidifying material for solidifying earth and sand as a soil quality improving material in order to strengthen the ground or the like, this inconvenience becomes even more remarkable.

In FIG. 27, T is a storage tank for storing the soil improving material, and F is a feeder for supplying the soil improving material from the storage tank T by a fixed amount. The feeder F is provided below the opening P for supplying soil improvement material formed in the bottom plate of the storage tank T. In addition, storage tank T
A rotating shaft A is mounted so as to penetrate the center of the bottom plate, and a stirring blade S extending in the radial direction is connected to the rotating shaft A near the bottom plate in the storage tank T. It is provided. Further, the rotation shaft A extends outside the storage tank T and is connected to a rotation driving means R such as a motor.

Now, it is assumed that the soil improving material has been stored almost completely in the storage tank T. At this time, gravity due to the soil improving material acts in the storage tank T in the direction of the arrow x. Then, this gravity becomes maximum at the position of the bottom plate in the storage tank T. On the other hand, in the storage tank T, the stirring blade S
Is rotating, the action of the stirring blade S causes
A force for pushing the soil improving material from the central portion side of the storage tank T toward the inner surface side of the peripheral trunk portion, that is, a force in the direction of the arrow y in the drawing acts. In addition, the position where the stirring blade S is provided is the lower position of the storage tank T, that is, the position where the gravitational force is maximum and the position in the vicinity thereof. The force in the direction of the arrow y by the stirring blade S is indicated by an arrow z
As a result, the force in the direction of pushing the soil improvement material upward along the inner surface of the circumferential body of the storage tank T acts. Since the direction of the action of gravity from above and the action of stirring from below are opposite directions, the soil improvement material is compressed from above and below with an extremely strong force. Due to the action of this compressive force, the soil improving material itself may be solidified in the vicinity of the lower end on the inner surface of the peripheral body of the storage tank T. In particular, when lime is used as a soil improvement material, the degree of solidification by compression becomes extremely large. And the storage tank T
When the solidification of the soil improvement material occurs on the inner peripheral surface side near the bottom plate in the inside, the portion cannot be used as the soil improvement material, and the soil improvement material not only wastes but also the storage tank T Can not be used efficiently
In addition, the stirring resistance of the stirring blade S is significantly increased, which causes inconvenience that smooth stirring cannot be performed. Further, the solidified soil improving material must be removed as appropriate, but there is a problem that the solidified soil improving material is extremely troublesome to remove since the solidified soil improving material sticks to the inner surface of the storage tank T. In addition, such inconveniences become more serious as the volume of the storage tank is increased.

Here, in order to suppress the compaction and solidification of the soil improvement material in the storage tank, it is conceivable to change the shape of the bottom of the storage tank. For example, if the bottom of the storage tank is formed in an inverted conical shape, the soil improving agent can be smoothly fed into the feeder by substantially no stirring or by applying a slight stirring force. However, in this case, the volume with respect to the height of the storage tank is reduced by the inverted conical shape, and a sufficient amount of the soil conditioner cannot be stored unless the height of the storage tank is increased.
When the height of the storage tank is increased as described above, not only is the work of supplying the soil improvement agent to the storage tank troublesome, but also when the soil improvement machine is a self-propelled type, the height of the entire machine is large. Therefore, it becomes inconvenient to transport the machine.

The present invention has been made in view of the above points, and an object of the present invention is to provide a soil-improving material supply device that uses a large amount of soil-improving material in order to reduce the frequency of replenishment of the soil improving material. The purpose is to prevent the soil improvement material from being compressed and solidified inside even when a large storage tank that can store the soil is used.

[0012]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present invention provides a soil improving material mixed with earth and sand along a route along which earth and sand are conveyed. A storage tank for the soil improvement material, a feeder connected to a lower portion of the storage tank, for supplying the soil improvement material to the conveyed soil in a fixed amount, and A tank agitating means for agitating the inside of the tank, the inside of the storage tank is provided with an inclined partition wall inclined downward toward the center thereof, and the inside of the storage tank is an upper storage area and a lower storage area. These storage areas are communicated with each other by a communication passage formed in the center of the inclined partition wall, and the bottom plate of the storage tank is provided with a soil improving material for the feeder at a position covered by the inclined partition wall. Supply It is an its features that it has a structure to form an opening.

Here, when at least the lower side of the storage tank is formed in a cylindrical shape with a bottom, the inclined partition may be configured to have a generally inverted frustoconical inclined surface. Further, the tank agitating means includes a rotating shaft disposed to penetrate a center portion of the bottom plate of the storage tank, and a plurality of rotating shafts connected to a position of the rotating shaft in the storage tank and radially extending near the bottom plate. It can be set as the structure provided with the stirring blade of this. In addition, these stirring blades are used as main stirring blades, and the tip portions of these main stirring blades are connected by a circular holding member, and the holding member has a plurality of auxiliary stirring blades radially inward with a predetermined pitch interval. When configured for mounting,
Pressing of the soil improving material toward the inner peripheral surface of the peripheral body of the storage tank by the tank agitating means can be suppressed. And in this case, the formation position of the soil improvement material supply opening is
These auxiliary stirring blades are arranged within the range of the rotation locus, particularly on the side close to the inner peripheral surface. Also, when the auxiliary stirring blade is inclined such that the side of the end face facing the rotation direction near the center of rotation faces rearward in the rotation direction, the pressing force of the auxiliary stirring blade against the inner peripheral surface of the soil improving material against the storage tank is reduced. It is more effective in controlling.

In performing the soil improvement treatment, the amount of the soil improvement material to be added varies depending on the purpose of use of the generated improved soil. In the case where the amount of the soil improving material added to the soil is small, for example, the cylindrical communication portion restricting member extended toward the bottom plate of the storage tank is formed in the formation portion of the communication opening of the inclined partition wall provided in the storage tank. By connecting and providing
The amount of soil improvement material sent from the upper storage area to the lower storage area can be limited. Further, if the communicating portion restricting member is configured to be capable of adjusting the position of the inclined partition wall in the vertical direction, when the supply amount of the soil improving material changes according to the purpose of the soil improving or the like,
By adjusting the position of the communication portion throttle member, the passage area from the upper storage area to the lower storage area can be adjusted. For example, when strengthening the ground, it is necessary to add a large amount of soil improvement material.Therefore, the passage restricting member is raised to increase the passage area from the upper storage region to the lower storage region, and to bury pipes. When performing, etc., when excavated soil is backfilled around the pipe laying portion, so-called backfill soil, the amount of soil improvement material added is small, so the passage narrowing member is lowered to reduce the passage cross-sectional area. Controls such as reduction can be performed.

The machine for performing the soil improvement process may be of a stationary type. However, a transport conveyer is mounted on a self-propelled vehicle as a mixing means and a sediment conveying means, and a feeder together with a storage tank is provided on the conveyer. As a configuration for installation, it may be configured to transport to an appropriate place and perform soil improvement. When the storage tank is configured as a self-propelled soil improvement machine, in order to increase the volume of the storage tank as much as possible and to reduce the height of the storage tank during transportation, the storage tank is moved vertically by using, for example, a bellows or the like. The upper tank part which can be extended and retracted and the lower tank part having a cylindrical shape with a bottom on the lower side may be provided continuously.
In this case, the inclined partition wall is fixed to the upper part of the lower tank part. As a method of mixing the earth and sand with the soil improving material, it is preferable to employ a mixing method in order to make the degree of mixing uniform, but it is needless to say that the mixing method can also be applied to a crushing method using a rotary striker. No.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. Here, in this embodiment, a self-propelled soil improvement machine in which a soil improvement machine is installed in a traveling vehicle is used, and a mixing method using stirring means is used as a mixing method of earth and sand and a soil improvement material. However, the present invention is not limited to these configurations.

FIGS. 1 and 2 show the overall construction of a self-propelled soil improvement machine, and FIG. 3 shows an exploded view of the mechanism. First, in FIG. 1, reference numeral 1 denotes a lower traveling body, and the lower traveling body 1 has a configuration including crawler-type means having a crawler belt 1a. In addition, as traveling means,
It can also be constituted by a wheel type or the like. The lower traveling body 1 is provided with a body frame 2 constituting a chassis connected thereto, and the body frame 2 is provided with various mechanisms and devices. In the main body frame 2, when the left side in FIG. 2 is set to the front of the machine, a material supply unit 3 is disposed at a front position. A processing mechanism unit 4 is mounted on the rear side, and an improved soil discharging unit 5 is further provided rearward from the processing mechanism unit 4. The improved soil discharging part 5 extends obliquely upward from a position below the processing mechanism part 4,
At an upper position of the processing mechanism unit 4, a machine room 6 in which machines such as an engine, a hydraulic pump, and a direction switching valve unit are incorporated is provided.

The material supply unit 3 is for supplying a material comprising soil and soil improving material for soil improvement, and controls a mixing ratio between the supplied soil and soil improving material. It has become. For this purpose, a carry-in conveyor 10 is provided, and a sediment hopper 20 is provided at the most upstream side, that is, in front of the machine in the carrying direction of the carry-in conveyor 10.
However, a soil improving material supply device 30 is installed on the rear side. Also, by measuring the amount of earth and sand transported by the loading conveyor 10,
The supply amount of the soil improving material from the soil improving material supply device 30 is adjusted according to the measured amount.

The carry-in conveyor 10 is provided so as to be inclined so as to rise from the end of the main body frame 2 at a predetermined angle. The carry-in conveyor 10 has a conveyor belt 11, which is provided between a drive wheel 13 supported by a frame 12 and a driven wheel 14, and a well-known tension adjusting mechanism on the driven wheel 14 side. It has. In order to support the transport surface of the transport belt 11, guide rollers 15 are provided below the transport surface at predetermined pitch intervals. Further, regulating plates 16, 16 are provided on both left and right sides of the transport surface of the transport belt 11 at positions upstream of the mounting portion of the earth and sand hopper 20. The conveyor 10 is provided in an inclined state in which the upstream side is low and rises obliquely upward toward the downstream side.

The earth and sand hopper 20 is configured as shown in FIGS. The earth and sand hopper 20 is formed of a substantially frame-shaped member, and has upper and lower openings. The earth and sand hopper 20 has an upper end fixed to a support member 18 provided on a support post 17 erected on the main body frame 2, and the lower end thereof corresponds to the inclination angle of the carry-in conveyor 10. Angle is inclined. Of the four peripheral walls constituting the earth and sand hopper 20, the wall surface 20a located on the downstream side of the carry-in conveyor 10 faces the surface of the conveyor belt 11 with a very small gap. The wall surfaces 20b and 20c are in contact with the regulating plate 16 of the carry-in conveyor 10. As a result, the end position of the carry-in conveyor 10 except for the upstream side thereof,
Oa, 20b, and 20c provide a substantially closed state.

The carry-in conveyor 10 in the earth and sand hopper 20
The lower end of the wall surface 20d located on the downstream side in the feed direction is arranged at a position substantially equal to the height of the regulating plate 16,
As a result, the earth and sand outlet 21 is formed in the earth and sand hopper 20. Further, a pressure roller 22 provided with a large number of pressing claws 22a on the outer peripheral surface is provided on the outer surface side (or the inner surface side) of the wall surface 20d of the earth and sand hopper 20, and the pressure roller 22 has an action of its own weight or A predetermined pressing force can be applied to the earth and sand that has passed through the outlet 21 by urging means such as a spring. Therefore, from the earth and sand hopper 20, a certain amount of earth and sand determined by the conveying speed of the conveyor belt 11 in the carry-in conveyor 10, the opening area of the outlet 21 and the pressing force of the pressure roller 22 is supplied to the processing mechanism unit 4. . Also, the earth and sand is not directly supplied to the earth and sand hopper 20, but solid foreign substances such as rocks, concrete, metal lumps, etc. are eliminated by the sieving unit 23, and the bulk density of the earth and sand is reduced, so that the inside of the earth and sand is sufficiently reduced. Then, it is dropped on the conveyor belt 11 after the air is contained.

The sieve unit 23 may be configured as a fixed sieve, but in the case shown in FIGS. 6 and 7, the sieve unit 23 is configured as a vibrating sieve that vibrates in the vertical direction. As a specific configuration, spring receiving members 26 are provided at four corners of the frame 24 of the sieving unit 23.
Are fixedly provided, and the support member 18 and the spring receiving member 26 are provided.
A spring 27 is interposed between the frame member and the frame member 24, and the frame body 24 is elastically supported by the support member 18. The lattice member 25 is provided with vibration means 28 for vertically moving the lattice member 25 mounted on the support frame 24. The vibrating means 28 has a vibrating member 28b which is rotationally driven by a driving means 28a. The vibrating member 28b is composed of a rotating drum, and has a lattice member 2 therein.
The end of a vibrating shaft (not shown) provided at 5 is inserted, and by rotating this vibrating member 28b, the vibrating shaft and the lattice member 25 connected thereto vibrate.

The carry-in conveyor 10 is provided with a soil improving material supply device 30 on the downstream side in the earth and sand transport direction. As shown in FIGS. 8 to 13, this soil improvement material supply device 30 includes four (or three)
It is supported by a frame-shaped base plate 32 provided on a support 31 of the book. Accordingly, the carry-in conveyor 10 extends to a position between the columns 31, 31, and a predetermined amount of soil improvement material is added on the carry-in conveyor 10 to the earth and sand supplied from the earth and sand hopper 20. become. Here, the soil improvement material is mixed with the earth and sand in order to improve or modify the soil quality, and a material suitable for the purpose of the soil improvement and reforming is used. When using as excavated soil as backfill soil to backfill the area around the pipe laying part when performing soil improvement to strengthen the ground or burying pipes, solidified material such as lime or cement, Particularly, lime is preferably used, and various additives and the like for promoting solidification are mixed with the lime as needed.

The soil improving material supply device 30 includes a storage tank 33 for storing a predetermined amount of soil improving material, and a storage tank 3 for storing the predetermined amount of soil improving material.
3 and a feeder 34 for supplying a soil improving material by a predetermined amount. Here, storage tank 3
Numeral 3 has a substantially cylindrical shape as a whole and has a space for storing the soil improving material therein. Here, in the illustrated one, the height dimension is variable. For this purpose, the storage tank 33 has a lower portion
A bellows as an upper tank part which is installed on the bottom and has a bottomed cylindrical lower tank part 35, a top plate part 36, and a variable upper part volume provided between the lower tank part 35 and the top plate part 36. Part 3
And 7.

The lower tank portion 35 and the top plate portion 36 are formed of a hard member such as a steel plate, and the bellows portion 37 is capable of extending and contracting in the up-down direction. As shown in the operating condition, a large amount of soil improvement material can be stored inside. FIG. 10 shows the stored state of the bellows 37. When the storage state is set as described above, the height of the soil improvement machine is reduced as described later. Therefore, the bellows portion 37 functions as height adjusting means of the soil improving material supply device 30.

The top plate 36 is formed of a plate whose outer peripheral side is bent downward, and has a substantially circular opening 36a formed in the center thereof. Are formed. At least three hook locking members 39 are provided outside the opening / closing lid 38. As shown in FIG. 11, the cutter 4 is located at a position below the top plate 36 where the opening / closing lid 38 is provided.
The cutter 40 is attached to a support arm 40 a connected to the lower surface of the opening / closing lid 38. The soil improvement material is filled in a flexible container, and the soil improvement material is directly supplied to the storage tank 33 from the flexible container.
Numeral 0 is for tearing off the lower end of the flexible container. Then, the soil improvement material is reliably stored in the storage tank 3 from the flexible container cut by the cutter 40.
The support arm 40a to which the cutter 40 is attached is provided at a position where the support arm 40a enters the ceiling plate 36 by a predetermined depth so as not to flow into the inside 3 and overflow or scatter around.

Here, the storage tank 33 is divided into upper and lower parts,
The bellows portion 37 is provided on the upper side in order to reduce the storage capacity of the soil improvement material in the storage tank 33 and to reduce the height dimension when the entire machine is transported by a trailer or the like. Therefore, it is necessary to selectively fix the operation state in FIG. 8 in which the bellows 37 is extended and the storage state in FIG. For this reason, the top plate portion 36 has approximately 120 °
The mounting plates 36b are provided so as to extend laterally at three locations at intervals, and a support rod 41 is vertically provided on each of the mounting plates 36b. Further, guide cylinders 42 are erected on the base plate 32 at positions corresponding to the vertical positions of the respective support rods 41, and the support rods 41 are slidably inserted into the guide cylinders 42, respectively. I have. As a result, the guide cylinder 42 and the support rod 41 are fitted in a telescope shape, and the support rod 41 can penetrate the guide cylinder 42 and protrude downward. The support rod 41 is provided with two pin insertion holes 41a and 41b at upper and lower positions in order to fix the bellows portion 37 in the extended operation state and the contracted storage state. Is provided with a pin insertion hole (not shown) at only one position. The support rod 41 is inserted into the pin insertion hole of the guide cylinder 42.
When the stopper pin 43 is inserted in a state where the pin insertion holes 41a at the lower part of the bellows are aligned with each other, the bellows portion 37 is maintained in an extended operating state. On the other hand, when the stopper pin 43 is inserted by aligning the pin insertion hole 41b above the support rod 41 with the pin insertion hole of the guide cylinder 42, the bellows 37 is held in the retracted state.

The lower tank portion 35 of the storage tank 33
Is a bottom plate 35, as shown in FIGS.
a and a peripheral body 35b.
5 is provided with a hopper stirring means 44. The stirring means 44 in the hopper has a plurality of rotating shafts 45 (4 in the drawing) extending through the central portion of the bottom plate 35a of the lower tank portion 35.
The main stirring blade 46 is attached to a position close to the bottom plate 35 a in the lower tank 35. On the other hand, at a position outside the lower tank portion 35 of the rotating shaft 45, the rotating shaft 45 is connected to a rotation driving means 47 fixedly provided on the back side of the bottom plate 35a. Here, the rotation driving means 47 is constituted by a hydraulic motor, an electric motor, or the like.

The tip of the main stirring blade 46 extends to the vicinity of the inner surface of the peripheral body 35b of the lower tank 35, and a ring-shaped holding member 48 is fixedly provided between the tip of each main stirring blade 46. Have been. In the holding member 48, one or a plurality of auxiliary stirring blades 49 are respectively mounted between connecting portions to the main stirring blades 46 located at the front and rear. Each of the auxiliary stirring blades 49 protrudes from the inner surface of the holding member 48 along the bottom plate 35a of the upper tank portion 35 toward the rotation shaft 45 by a predetermined length.

The stirring means 44 in the hopper having the above configuration
Is provided on the bottom plate 35a of the lower tank portion 35 to supply the soil improving material from the storage tank 33 to the feeder 34, and the soil improving material is smoothly and reliably supplied from the soil improving material supply opening 50 having a predetermined opening diameter. To the feeder 34. Here, the opening 50 for supplying the soil improvement material
Is provided at a position close to the outer peripheral side of the bottom plate 35a, that is, the side connected to the peripheral body 35b.
The rotation trajectory 9 includes the upper part of the position where the soil improving material supply opening 50 is opened. The rotation direction of the stirring means 44 in the hopper is the direction indicated by the arrow in FIG. 13A, and the main stirring blade 46 has a front side surface in the rotation direction as shown in FIG. The inclined surface 46a rises upward. Further, the side surface 49a on the front side in the rotation direction of the auxiliary stirring blade 49 is on the plane thereof, from the side connected to the holding member 48, that is, from the outer peripheral side of the lower tank portion 35 toward the rotation center side in the rotational direction rearward. It is inclined to face.

Further, between the lower tank portion 35 and the bellows portion 37 constituting the upper tank portion, an inclined partition wall 51 having a substantially inverted frustoconical shape is provided. The inclined partition wall 51 is made of a steel plate or the like, and its outer peripheral end is fixed to the upper surface of the lower tank portion 35 by means of screws, welding, or the like. Further, it has a guide surface which is inclined obliquely downward toward the center from the connection portion to the lower tank portion 35, and an opening of a predetermined size is formed in the center. Therefore, the inside of the storage tank 33 is partitioned into an upper storage area on the bellows 37 side and a lower storage area on the lower tank section 35 side by the inclined partition wall 51. In addition, the upper storage area and the lower storage area communicate with each other through an opening formed in the central portion of the inclined partition wall 51, and the opening of the inclined partition wall 51 serves as a communication passage 51a therebetween.
Here, the inclined partition wall 51 extends at least to a position that almost completely covers the soil improving material supply opening 50 formed in the bottom plate 35a, and preferably extends to a position closer to the center than the inner end position of the auxiliary stirring blade 49. Extending.

The feeder 34 connected to the storage tank 33 is for supplying the soil improving material at a regulated supply amount. That is, as shown in FIGS. 14 to 16, the feeder 34 has a casing 52 fixed to the lower surface of the soil improving material supply opening 50 in the storage tank 33, and the casing 52 has a soil improving material supplying opening 50. And a supply port 52b opened downward, and an intermediate wall surface thereof is an arc-shaped quantitative supply section 52c. A rotor 53 is provided inside the quantitative supply section 52c with a rotating shaft. 54, the rotor 53
Are driven to rotate by a rotation shaft 54.
The rotor 53 is provided with a plurality of partition walls 53a that are substantially in slidable contact with the inner wall surface of the fixed quantity supply unit 52c, and are radially provided.
Each time the rotor 53 rotates by a predetermined angle, the partition wall 53 adjacent to the rotor 53 rotates.
The soil improving material corresponding to the space between a and 53a is separated. Therefore, every time the rotor 53 rotates by a predetermined angle, the soil improving material for the volume of the space described above is supplied in a fixed amount. Therefore, by controlling the rotation speed of the rotor 53, it is possible to control the supply amount of the soil improvement material,
That is, the higher the rotation speed of the rotor 53, the greater the supply amount of the soil improving material. For this purpose, the rotating shaft 54
Is extended to the outside of the casing 52, and a pulley 54a is provided so as to be connected to an end of the rotating shaft 54. A transmission belt or the like is provided between the pulley 54a and the output shaft 55a of the motor 55. A power transmission member 56 is interposed. Here, in order to strictly control the supply amount of the soil improvement material due to the rotation of the rotor 53, it is desirable to use a variable speed electric motor as the motor 55. If so, a hydraulic motor may be used.

In the soil-improving material supply device 30 configured as described above, the storage tank 33 is filled with the soil-improving material, and this filling operation is performed from a flexible container. Since the soil improving material supply device 30 is located at a high place, the open / close lid 38 provided on the top plate 36 is opened, and the flexible container is suspended, and the flexible container is suspended from the open / close lid 38 into the storage tank 33. It must be inserted so that its lower end is cut off by the cutter 40. For this purpose, the main body frame 2 is provided with a crane 57 at a position on one side thereof. This crane 57
As shown in FIG. 17, a turning portion 57a is provided on the main body frame 2, a support member 57b is erected on the turning portion 57a, and a base end of an arm 57c which expands and contracts in a telescopic shape is provided on the support member 57b. The section is pivotally supported so that the cylinder 57d can perform a raising / lowering operation. And the arm 57
A wire 59 connected to a hook 58 is connected to the tip of c, and the hook 58 can be moved up and down by winding up and down the wire 59.

As described above, the earth and sand and the soil improving material are conveyed by the conveyor belt 11 constituting the carry-in conveyor 10, and the end of the carry-in conveyor 10 is formed between the sand and the soil improving material in the processing mechanism unit 4. It is connected to the processing tank 60 as a mechanism for stirring and mixing. The processing tank 60 is formed of a rectangular container arranged in the longitudinal direction of the main body frame 2, that is, in a substantially horizontal direction. At positions before and after the processing container 60, mounting portions 61 projecting to the left and right are continuously provided. Reference numeral 61 is fixedly installed on the upper surface of the main body frame 2 by bolts or the like. Therefore, FIGS. 18 to 21 show the internal configuration of the processing tank 60 constituting the processing mechanism unit 4.

First, as apparent from FIGS. 18 and 19, an inlet 62 forming an inlet portion is provided at an upper portion on the front side of the processing tank 60, and an outlet port forming a discharge portion is provided at a lower portion on the rear side. 63 are provided in connection with each other, and the other parts are sealed. As shown in FIGS. 20 and 21, an even number, for example, two paddle mixers 64 are provided in parallel in the processing tank 60. The paddle mixer 64 has a rotating shaft 65 on which a large number of paddles 66, which are intermittently provided blades serving as a stirring / transferring member, are planted at a predetermined angle (for example, every 90 °). By rotating the rotation shaft 65, the paddle 6
6 is driven to rotate, the inside of the processing tank 60 is stirred, and the earth and sand and the soil improving material guided into the processing tank 60 are transferred to the discharge port 63 side while being stirred and uniformly mixed. Will be. Then, this transfer amount changes according to the angle of the paddle 66.

Since the processing tank 60 is installed together with other equipment on the main body frame 2, its overall dimensions are limited. In order to efficiently stir and mix in the restricted container. , A paddle mixer 64 is used. Both ends of the rotary shaft 65 of each paddle mixer 64 are
7 and 67, the tip of the rotating shaft 65 is connected to a driving unit 6 provided at the front end of the processing tank 60.
8 extending into the housing. A transmission gear 69 is connected to the tip of each rotating shaft 65.
9, 69 are mutually meshed. One transmission gear is connected to the output shaft of a hydraulic motor 70, and by rotating this hydraulic motor 70, both rotating shafts 65, 65 provided with paddles 66 are simultaneously driven in opposite directions. Is driven to rotate. Here, the bottom of the processing tank 60 has a curved surface shape that substantially matches the rotation trajectory of the paddle 66, thereby preventing earth and sand and soil improving material from staying at the corners and the like at the lower end of the processing tank 60. I have.

As described above, the processing tank 60 is connected to the inlet 62.
The processing tank 60 has a sealed shape except for the discharge port 63. However, solid foreign matter or the like may enter the processing tank 60, impeding the smooth operation of the paddle mixer 64, or in an extreme case, the operation of the paddle mixer 64. Or stop. When a solidifying material such as lime or cement is used as the soil improvement material, if the soil improvement material remains in the treatment tank 60, it can stick to the inner surface of the treatment tank 60 or the paddle 66. There is. In addition, paddle 66
Is worn out over a long period of time, and therefore needs to be repaired or replaced as appropriate. From the above, it is necessary to inspect the inside of the processing tank 60 and to repair it if necessary. For this purpose, an opening / closing door 71 is provided at an appropriate position on a side surface of the processing tank 60, and an inspection hole 72 provided with a lid is provided at an upper portion thereof. Further, if necessary, an opening / closing door may be provided on the upper portion, and the lower surface may be opened / closed.

In the treatment tank 60 having the above configuration, the earth and sand introduced from the inlet 62 and the soil improving material are uniformly stirred and mixed by the action of the paddle mixer 64, and transferred to the outlet 63. In the meantime, improved soil is produced.
The improved soil thus produced is discharged from the discharge port 63 to the improved soil discharge section 5 by the action of its own weight. Here, the improved soil discharging section 5 has a carry-out conveyor 80.

Next, FIG. 22 shows a state in which soil improvement processing is being performed using a soil improvement machine. The figure shows that a soil improvement machine is arranged in a small-scale yard to improve the soil quality of the soil previously deposited in this yard. Is required. For example, a hydraulic excavator PS is suitably used as the means for charging earth and sand.

In order to improve soil quality in the yard,
Sediment deposited with a predetermined spread is picked up in order from the end by a bucket B of a hydraulic shovel PS, and put into a soil hopper 20 of a soil improvement machine. This earth and sand hopper 2
While the earth and sand is being conveyed by the carry-in conveyor 10 from 0,
The soil improvement material is supplied from the soil improvement material supply device 30,
Supplied on the surface of earth and sand. And the loading conveyor 10
The mixture of the earth and sand and the soil improving material is fed into the processing tank 60 from the end through the inlet 62, and the soil and the soil improving material are stirred and mixed by the action of the paddle mixer 64 provided in the processing tank 60. It moves to the position of the discharge port 63. Then, the improved soil in the aggregated state is produced by uniformly mixing the earth and sand and the soil improvement material in the treatment tank 60. The improved soil is discharged from discharge port 63 to discharge conveyor 80.
And is deposited at a predetermined position.

As described above, when the produced improved soil is deposited at a predetermined position on the discharge conveyor 71, the improved soil may be deposited directly at the location where the soil has been removed from the location where the soil has been accumulated. However, since the improved soil has an aggregated shape, it may be desirable to classify the soil according to the particle size. Therefore, the sorting device 81 is provided. The sorting device 81 is configured as a portable type, and includes a sieve 82 and a transfer conveyor 83. The sieve 82 has a mesh size that allows passage of a particle having a predetermined particle size, for example, 13 mm or less, 20 mm or less, or 25 mm or less, and is desirably constituted by a vibrating sieve. After passing through the sieve 82, the improved soil having a uniform particle size is deposited on a predetermined deposition location by the transfer conveyor 83. Also,
Since the improved soil having a large particle size that has not passed through the sieve 82 has the same quality in that the solidification treatment has been performed,
The improved soil having a large particle size is used as it is or after being subjected to a process for equalizing the particle size, as a material for backfilling or the like.

Incidentally, the volume of the storage tank 33 in the soil conditioner supplying device 30 determines the continuous operation time of the soil conditioner. The soil improvement is performed continuously. If the soil and the soil improvement material are supplied to the treatment tank 60, the soil is continuously stirred and mixed, and the improved soil is continuously discharged. Therefore, continuous processing becomes possible as long as the supplied material is not stopped. Here, the materials to be supplied are earth and sand and a soil improvement material. While the earth and sand are sequentially supplied during the treatment, the soil improvement material is provided by a soil improvement material supply device 30 having a predetermined volume. Storage tank 33
Since it is supplied from a batch system, it must be refilled before the soil improvement material inside is completely consumed.

The operation of replenishing the soil improving material into the storage tank 33 is performed as follows. First, with the opening / closing lid 38 provided on the top plate portion 36 opened, a flexible container is hooked on the hook 58 of the crane 57 and lifted up.
The flexible container is arranged at an upper position of the opening 36 a of the top plate 36 opened by opening the opening / closing lid 38, and the wire 59 is paid out, so that the lower part of the flexible container enters the inside of the storage tank 33. Since the cutter 40 is provided in the storage tank 33, the flexible container is cut by the cutter 40, so that the soil improving material is supplied into the storage tank 33 from the cut portion. Then, since the worker performs the replenishment operation of the soil improving material at a position near the soil improving material supply device 30 of the soil improving machine, the hydraulic excavator PS must be stopped, so that the soil improving process is substantially performed. Must be interrupted.

From the above, the continuous operation time of the soil improvement treatment substantially depends on the volume of the storage tank 33. Therefore, it is necessary to use a large storage tank so that the soil improvement machine can be operated continuously for as long as possible. The storage tank 33 is provided with a bellows 37 as an upper tank.
This is the reason why the bellows portion 37 is expanded and contracted. When soil improvement is performed in a predetermined yard, the inner volume of the storage tank 33 is increased by extending the bellows portion 37 so that a large amount of soil improvement material can be stored at one time. When transporting the soil improvement machine, the bellows 37 is reduced.

When the bellows portion 37 is extended, the storage tank 3
When the height of the soil improving material 3 becomes extremely large and the inside thereof is almost completely filled with the soil improving material, the storage tank 3
In 3, the weight of the soil improvement material acts downward. Also,
In the storage tank 33, the operation of the stirring means 44 in the hopper, particularly the rotation of the main stirring blade 46, causes the storage tank 33 to rotate.
Inside, a flow is formed in the direction in which the soil improvement material is pushed out from the central portion toward the outer peripheral side. Then, the flow of the soil improvement material is transferred to the peripheral body portion 35 in the lower tank portion 35.
Since the flow is regulated by the inner surface of b, the flow is converted into an upward flow, that is, a flow in the direction opposite to the direction of its own weight of the soil conditioner.

By the way, inside the storage tank 33, an inclined partition wall 51 is provided between the bellows portion 37 constituting the upper tank portion and the lower tank portion 35 so as to partition into an upper storage region and a lower storage region. Therefore, the weight of the soil improving material in the upper storage area in the bellows portion 37 is received by the surface of the inclined partition wall 51. Moreover, since the in-hopper stirring means 44 is provided in the lower tank portion 35, that is, in the lower storage area, the in-hopper stirring means 4 is provided.
At the position where 4 is arranged, the own weight of the soil conditioner located in the upper storage area in the bellows portion 37 does not substantially act.

[0047] From the above, in the storage tank 33, as shown in FIG. 23, in the upper reservoir region due to its own weight is inclined partition wall 51 of the soil improvement agent, gravity acts in the direction indicated by the arrow X ₁ and, and on the lower reservoir region, the direction of gravity indicated by the arrow X ₂ acts. However, in the lower storage area, the own weight of the soil improving material below the position of the inclined partition wall 51 acts, and there is no effect of the own weight of the soil improving material in the upper storage area. That is, by providing the inclined partition wall 51, the force of compressing the soil improvement material toward the bottom plate 35a of the lower tank 35 is significantly reduced. Since the stirring means 44 in the hopper is arranged in the lower storage area,
The resistance to the rotation by the rotation driving means 47 is significantly reduced, and the rotation can be smoothly performed with a light load.

[0048] When the hopper stirring means 44 is actuated, the rotation of the main agitating blade 46, as indicated by the arrow Y ₁ in FIG. 23, flows as soil improvement material is pushed toward the center side toward the outer periphery Will be. However, the stirring means 44 in the hopper is provided with a predetermined number of auxiliary stirring blades 49 in addition to the main stirring blades 46 and at different positions in the rotation direction with respect to the main stirring blades 46. The auxiliary stirring blade 49 is inclined so as to be rearward in the rotation direction toward the rotation center. Thus, by the action of the auxiliary agitating blade 49, the soil improvement agent, as shown in FIG by the arrow Y _2, force is exerted to push back toward the outer peripheral side to the center. As a result, in the rotation locus region of the auxiliary stirring blade 49, the soil improving material is stirred so as to be in a kind of turbulent state, and fluidization is further promoted at this position. Since the soil improving material supply opening 50 is arranged in this turbulent region, the supply of the soil improving material from the storage tank 33 side to the feeder 34 side is further promoted.

Here, the force in the direction of pushing the soil improvement material back to the center, that is, the force in the Y ₂ direction is applied by the main stirring blade 46 to the Y direction.
Set so that it is weaker than the force in _one direction. Moreover,
The auxiliary stirring blade 49 has a length that does not extend to the portion of the communication passage 51 a formed in the center of the inclined partition wall 51 in order to allow the soil improving material to flow from the upper storage area to the lower storage area. As a result, at the position of the communication passage 51a, the main stirring blade 46
Only Y ₁ direction force due to from act, transition soil improvement agent from the upper reservoir region to the lower reservoir region can be smoothly performed. Furthermore, the partitioning of both storage areas is
Since the inclined surface descends toward the communication passage 51a, all the soil improving material in the upper storage area surely moves to the lower storage area.

As described above, in the lower tank portion 35, the flow direction of the soil improving material is pushed back by the auxiliary stirring blades 49 in the direction opposite to the flow direction of the main stirring blades 46. The radially outward acting force by the main stirring blade 46 is set to be larger.
Therefore, the soil improvement material flows upward along the inner surface of the circumferential body 35b, that is, a flow is formed in the direction of the arrow Z in FIG. However, Y to cancel the Y ₁ direction
Since _{the two} directions of force is working, the vector in the Z direction is reduced, and because the this Z direction due to the weight of soil improvement agent also reduced the pressing force of gravity direction X ₂ from above in the opposite direction, The degree to which the soil improvement material is compressed by these opposing forces is extremely small, and there is no possibility that the soil improvement material is compressed and solidified in the vicinity of the bottom plate 35a on the side of the peripheral body 35b of the lower tank portion 35.

The amount of the soil improving material supplied from the soil improving material supply opening 50 to the feeder 34 depends on the amount of the soil improving material added to the soil. On the other hand, the transfer of the soil improvement material from the upper storage area to the lower storage area is performed by the rotation of the main stirring blade 46, and therefore, the inflow and outflow of the soil improvement material into the lower storage area are almost the same. I have to do it. When the ground is improved, the mixing ratio of the soil improvement material to the soil is generally larger than the improved soil used as the backfill material. Therefore, it is necessary to change the supply amount of the soil improvement material according to the use of the improved soil produced by the soil improvement machine.

When the hopper stirring means 44 has a predetermined structure, the amount of the soil improving material flowing from the upper storage area to the lower storage area depends on the opening diameter of the communication passage 51 formed in the inclined partition wall 51. It changes with. That is, when the opening diameter of the communication passage 51 is increased, the inflow amount of the soil improvement material increases by that much. Therefore, for example, in the case where the inclined partition wall is configured so as to have an appropriate communication path opening diameter when performing ground improvement, in the case where the inclined partition wall is used for manufacturing a backfill material, as shown in FIG. A communication portion throttle member 100 is provided below the inclined partition wall 51. This communication part throttle member 1
Reference numeral 00 denotes a ring-shaped member having a predetermined width, and an annular gap is formed between a lower end portion thereof and a bottom plate 35a of the lower tank portion 35. Therefore, this gap is formed by the communication path 100.
a. The opening area of the communication passage 100a is smaller than the area of the opening of the inclined partition wall 51. Thereby, the passage area for the soil improving material to transfer from the upper storage area to the lower storage area is reduced. As a result, the inflow and outflow of the soil improvement material in the lower storage area can be balanced, the inflow to the lower storage area exceeds the outflow, and the pressure in the lower storage area abnormally increases. There is no shortage of supply of the soil improvement material to the feeder 34.

Further, with the configuration as shown in FIG. 25, it is possible to arbitrarily adjust the transfer amount of the soil improving material from the upper storage area to the lower storage area. That is, as shown in the drawing, a portion of the inclined wall portion 51 that opens as the communication passage 51a is provided with the holding cylinder 10 vertically extending downward.
1 is provided, and a ring-shaped communicating portion throttle member 102 is arranged so as to surround the holding cylinder 101. The communication area between the upper storage area and the lower storage area is changed by adjusting the position of the communication section restricting member 102 in the vertical direction. For this purpose, an adjusting means 103 is provided between the communicating portion throttle member 102 and the holding cylinder 101. The adjusting means 103 includes a bracket 104 extending from the outer peripheral surface of the holding cylinder 101 and the communicating portion restricting member 1.
02 and a bracket 105 extending from the outer peripheral surface of the screw shaft 10 between the two brackets 104, 105.
6 and is fixed with a nut 107.

With such a configuration, the communication area can be set to an arbitrary value by appropriately adjusting the height position of the lower end portion of the communication portion restricting member 102 by the nut 107. Therefore, when the improved soil improved by the soil improvement machine is used, for example, for ground improvement, the communication portion throttle member 102 is raised to increase the passage area, and is used as a backfill material. In this case, by fixing the communication portion throttle member 102 to the lowered position, the cross-sectional area of the passage can be reduced. Therefore, this soil improvement material supply device 30 can be used commonly for ground improvement and for producing backfill materials at excavated sites.

Further, the agitating means in the hopper is for agitating the soil improving material in the lower storage area and sending it into the feeder 34 through the opening 50 for supplying the soil improving material. Therefore, when the supply amount of the soil improvement material per unit time is large, it is necessary to stir the soil improvement material by the hopper stirring means more efficiently and to increase the outward transfer amount. To this end, as shown in FIG. 26, the end surface 146a of the main stirring blade 146 that constitutes the stirring device 144 in the hopper is inclined forward in the rotation direction, and is moved rearward in the rotation direction toward the tip end. Tilt toward This allows a greater amount of outward flow for the soil conditioner.

The feed rate of the soil improving material supplied by the feeder 34 can be controlled by changing the rotation speed of the motor 55. Also, when the processing work itself is different, such as ground improvement and backfilling, and when performing various types of soil improvement processing, there is a significant difference in the mixing ratio between soil and soil improvement material It is desirable to change the supply amount of the soil improvement material per rotation of the rotor itself by replacing the rotor 53 in the feeder 34. When the supply amount of the soil improvement material is small, the stirring means in the hopper may be the one shown in FIG.
When the in-hopper stirring means 44 having the configuration shown in FIG. 3 is used, and the supply amount of the soil improving material is large, the in-hopper stirring means 44 shown in FIG.
4 can also be used.

[0057]

As described above, the present invention is constructed as described above. In order to perform the soil improvement process continuously for a long time, even if the storage tank serving as the supply source of the soil improvement material is enlarged, The inside of the storage tank can be smoothly stirred with a light load, and there is an effect that the soil improving material is not compressed from above and below and solidified in the storage tank.

[Brief description of the drawings]

FIG. 1 is a plan view of a self-propelled soil improvement machine showing one embodiment of the present invention.

FIG. 2 is a front view of FIG.

FIG. 3 is an exploded view showing a structure of each mechanism for performing a soil improvement process in FIG. 2 in an exploded manner.

FIG. 4 is a cross-sectional view of the earth and sand hopper according to the embodiment of the present invention.

FIG. 5 is a sectional view taken along line AA of FIG. 4;

FIG. 6 is a plan view of a sieve unit according to the embodiment of the present invention.

FIG. 7 is a front view of FIG. 6;

FIG. 8 is a front view of the soil improvement material supply device according to the embodiment of the present invention.

FIG. 9 is a plan view of FIG.

FIG. 10 is a front view similar to FIG. 8, showing the storage tank of the soil improvement material supply device in a stored state.

FIG. 11 is a plan view showing the soil improving material supply device of FIG. 8 with an open / close lid removed.

FIG. 12 is a sectional view taken along the line BB of FIG. 9;

FIG. 13A is a sectional view taken along the line CC of FIG.
FIG. 2B is a cross-sectional view of the main stirring blade.

FIG. 14 is a plan view of a feeder according to the embodiment of the present invention.

FIG. 15 is a sectional view taken along line DD of FIG. 14;

FIG. 16 is a sectional view taken along the line EE of FIG. 15;

FIG. 17 is a front view showing a configuration of a crane installed in the self-propelled soil improvement machine according to one embodiment of the present invention.

FIG. 18 is a plan view of a processing tank in one embodiment of the present invention.

FIG. 19 is a front view of FIG. 18;

FIG. 20 is a sectional view taken along line FF of FIG. 18;

21 is a sectional view taken along the line GG of FIG.

FIG. 22 is an operation explanatory view showing a state in which soil improvement is performed in the yard by the self-propelled soil improvement machine according to one embodiment of the present invention.

FIG. 23 is an operation explanatory view of the soil conditioner supply device according to the embodiment of the present invention.

FIG. 24 is a sectional view similar to FIG. 12, showing another example of the configuration of the soil conditioner supply device according to the present invention.

FIG. 25 is a cross-sectional view of a main part showing another configuration example of the soil conditioner supply device according to the present invention.

FIG. 26 is a plan view showing another example of the configuration of the in-hopper stirring means used in the present invention.

FIG. 27 is a diagram illustrating the operation of a conventional soil improvement material supply device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Lower traveling body 2 Main body frame 3 Supply part 4 Processing mechanism part 5 Discharge part 10 Carry-in conveyor 20 Sediment hopper 23 Sieving means 30 Soil improving material supply device 31 Post 32 Base plate 33 Storage tank 34 Feeder 35, 135 Lower tank part 36 Top plate part 37 Bellows part 38 Opening / closing lid 39 Hook locking tool 40 Cutter 44, 144 In-hopper stirring means 45 Rotating shaft 46, 146 Main stirring blade 47 Rotation driving means 48 Holding member 49 Auxiliary stirring blade 50 Soil improving material supply opening 51 Slant partition 51a, 100a
Communication passage 53 Rotor 54 Crane 58 Hook 60 Processing tank 64 Paddle mixer 100, 102
Communication passage restricting member 101 Holding cylinder 103 Adjusting means

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yasuharu Yamamoto 2-6-1 Otemachi, Chiyoda-ku, Tokyo Inside the Hitachi Construction Machinery Co., Ltd. (72) Inventor Tetsushiro Miura 2-6-Otemachi, Chiyoda-ku, Tokyo No. 2 Sun Construction Machinery Co., Ltd. AA01 AB01 AB20 BA01 BA07 DA01 EA10

Claims (8)

[Claims] 1. A method for supplying a soil improving material to be mixed with earth and sand in the course of transporting the earth and sand, and mixing the soil and the soil improving material by a mixing means. A storage tank, a feeder that is connected to a lower portion of the storage tank and supplies a constant amount of soil improvement material to the conveyed sediment, and a tank agitating unit that agitates the inside of the storage tank; and The storage tank is provided with an inclined partition wall inclined downward toward the center thereof, and the storage tank is partitioned into an upper storage area and a lower storage area, and both storage areas are formed at the center of the inclined partition wall. It is communicated by a passage, and on the bottom plate of the storage tank,
An apparatus for supplying a soil improving material, wherein an opening for supplying a soil improving material to the feeder is formed at a position covered by the inclined partition wall. 2. The storage tank has a cylindrical shape with a bottom at least on a lower side, and the inclined partition wall has an inclined surface having a substantially inverted frusto-conical shape. A rotating shaft arranged to penetrate the center of the bottom plate of the tank, and a plurality of stirring blades connected to a position of the rotating shaft in the storage tank and radially extended near the bottom plate. The soil improvement material supply device according to claim 1, wherein: 3. Each of the stirring blades is used as a main stirring blade, and the leading ends of the main stirring blades are connected to each other by a circular holding member. 3. The soil improvement material supplying apparatus according to claim 2, wherein an auxiliary stirring blade is attached, and a formation position of the soil improvement material supply opening is configured to be within a range of a rotation locus of the auxiliary stirring blade. . 4. The supply of soil improvement material according to claim 3, wherein the auxiliary stirring blade is configured to be inclined such that a side closer to the center of rotation of an end face in the front in the rotation direction faces rearward in the rotation direction. apparatus. 5. A configuration in which the inclined partition wall is provided with a cylindrical communication portion throttle member extending toward the bottom plate side of the storage tank connected to a communication passage forming portion between upper and lower storage regions. The soil improvement material supply device according to claim 1, wherein: 6. The soil improvement material supply device according to claim 5, wherein the communication portion throttle portion is configured to be vertically displaceable. 7. A structure in which a transport conveyor is mounted on a self-propelled vehicle as said mixing means and earth and sand transport means, and a feeder is installed on said transport conveyor together with said storage tank. The soil improvement material supply device described in the above. 8. The storage tank has a configuration in which an upper tank portion that can expand and contract in the up-down direction and a lower tank portion that has a cylindrical shape with a bottom on the bottom side are connected to each other.
The soil improvement material supplying apparatus according to claim 7, wherein the apparatus is fixed to an upper portion of the lower tank portion.