JP2000230231A - Self-propelled soil improving machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a structure for protecting a soil improving material in a soil improving material hopper which is extremely convenient for the inspection and maintenance of the inside of a processing tank by holding the processing tank at the closed state other than an introduction section of earth, sand and the soil improving material and a discharge section of improved soil. SOLUTION: A processing tank 60 for stirring and mixing sediment and lime in a process mechanism section 4 is provided with a paddle mixer 64 in it, and it is formed with an upper face 60a, an upper side face 60b formed into a rectangular frame shape and a main body section 60c fixed to the lower end section of the upper side face 60b by welding. The main body section 60c has a tandem concave curved face shape nearly matched with the rotating locus of a paddle 66. An opening for maintenance is formed on the side face, openable closing members 71 are fitted to the opening at the required positions, two small openings are provided on the upper face 60a of the processing tank 60, tubular inspection port members 72, 73 are provided on the openings, and opening/closing covers 74, 75 are removably connected to the inspection port members 72, 73 by hinges.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a machine used for improving soft ground and strengthening the ground, and for improving the quality of earth and sand to meet a predetermined purpose. The present invention relates to a self-propelled soil improvement machine that performs soil improvement while traveling appropriately.

[0002]

2. Description of the Related Art For example, in burying gas pipes, water and sewage works, other road works, foundation works, etc., it is desirable to backfill excavated soil, 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 occurs 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 soils into reusable resources. As described above, in order to make it possible to reuse soft soil and the like that may cause land subsidence when backfilling the soil generated by excavation, for example, a soil improvement material mainly composed of lime or the like in earth and sand Is mixed with earth and sand to solidify. 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. A typical mixing method of the soil and the soil improvement material is a mixing method using a stirring means. And a crushing method provided with a rotary striker are conventionally known. The mixing method is
A stirring means is provided in the tank, and the earth and sand and the soil improving material are charged into the tank and uniformly stirred and mixed by the stirring means. The stirrer performs a batch type process that only performs the function of stirring and mixing the inside of the tank, and a screw-type stirrer is provided to stir and mix the soil and soil improvement material in a predetermined direction. In some cases, a continuous process is performed in which the soil and soil improvement material are continuously supplied and the generated improved soil is continuously discharged. A crushing type soil improvement machine as another method of soil improvement processing is disclosed in, for example, JP-A-9-195265. This crushing type soil improvement machine is provided with a crushing machine consisting of a rotary hitter, and the earth and sand and the soil improvement material are dropped from the upper position toward the rotary hitter, and the rotary hitter is rotated in the meantime. By doing so, the soil and the soil improvement material are hit and broken.

Here, a soil improvement machine using a crushing method is
Rather than stirring and mixing, the quality of the improved soil produced in terms of crushing by impact cannot be obtained, particularly in terms of the degree of mixing between the soil and soil improvement material. On the other hand, the mixing type soil improvement machine can mix the sand and soil improvement material uniformly and control the mixing ratio. It can be. Therefore, when producing high quality improved soil on an industrial scale, a mixing type soil improvement machine is advantageously used.

[0005] However, the mixing type soil improvement machine according to the prior art uses a large mixing device and an extremely large volume soil improvement material hopper, and the earth and sand is transported by a belt conveyor to the earth and sand hopper to process a large amount of earth and sand. It is generally configured as a large plant that is suitable for Therefore, in such a large-scale plant, it is possible to efficiently produce high-quality improved soil in which the soil and soil improvement material are extremely uniformly mixed, but the soil is collected from a wide area, and the produced improved soil covers a wide range. Since the supply is supplied, the transportation cost becomes extremely high, and the dump truck frequently passes.

[0006]

Here, as a mixing type soil improvement machine, a self-propelled vehicle having a compact and compact configuration and substantially all components for performing soil improvement processing incorporated in a traveling vehicle. If it is configured as a type soil improvement machine, it can be carried into a small yard where a relatively small amount of earth and sand is accumulated and soil improvement processing can be performed.
The above-mentioned problems of transportation costs of the earth and sand and the improved soil, obstacles in traffic, and the like are suppressed, and since the soil improvement machine is reused for a plurality of yards, there are advantages such as improvement in mechanical efficiency.

[0007] In view of the above, the present inventors have proposed a soil improvement processing means for producing improved soil by stirring and mixing soil and soil improvement material together with a hopper and the like for supplying soil and soil improvement material. Developed a self-propelled soil improvement machine attached to
A patent application was filed as Japanese Patent Application No. 10-209647.
This soil improvement machine is constituted by a processing tank provided with a paddle mixer as a soil improvement processing means, a carrying-in conveyor is connected to the processing tank, and the carrying-in conveyor receives earth and sand from a soil hopper and a soil improving material hopper. Are respectively supplied.

[0008] With this configuration, it is possible to continuously and efficiently produce a high-quality soil improving material in which the soil and the soil improving material are uniformly mixed with a small and compact structure. In addition, since the self-propelled soil improvement machine has mobility and can be easily transported by a trailer or the like, it can be appropriately carried into a plurality of relatively small yards and accumulated in the yard. It has excellent features such as improvement. However, the self-propelled soil improvement machine according to the prior application is not without its problems.

In order to modify the earth and sand into a backfill material, a ground improvement material, and the like, a soil improvement material that solidifies the earth and sand, that is, a solidification material is used. As the solidification material, lime is usually used. . Some soils to be subjected to the soil improvement treatment include those in a wet state containing a large amount of water. When lime is mixed with such wet earth and sand, heat is generated by the reaction between lime and water, and a large amount of water vapor is generated. In order to increase the volume of the soil improvement material hopper as much as possible after downsizing the soil improvement machine, this soil improvement material hopper is located at the top of the treatment tank,
Moreover, it is arranged at a position very close to the processing tank.
Therefore, when the upper part of the treatment tank is open, the soil improvement material hopper is placed in a high humidity atmosphere due to the generation of steam,
The lime stored in the soil improvement material hopper is solidified or deteriorated due to the influence of moisture in the air. Therefore, the treatment tank must be constituted by a container which is as closed as possible except for an opening which is necessary for introducing earth and sand and solidified material and discharging the improved soil.

Meanwhile, a paddle mixer or the like having a paddle planted on a rotating shaft is used as a mixing means in the processing tank.
The earth and sand and the solidified material are stirred and mixed by the paddle mixer. The earth and sand supplied into the treatment tank may contain solid foreign matters such as rocks and concrete pieces, and foreign matters such as vinyl sheets, etc., which impede the normal operation of the paddle mixer. In an extreme case, the paddle mixer may be locked. Therefore, when the operation of the paddle mixer is hindered due to the entry of foreign matter, the foreign matter must be removed. Further, since the solidifying material solidifies the earth and sand, the solidifying material and the earth and sand may adhere to the rotating shaft and the paddle in the paddle mixer, or may adhere to the inner wall of the treatment tank. Therefore, the inside of the processing tank must be easily cleaned. Furthermore, since the paddle stirs the earth and sand and the solidified material, and wear occurs early, the paddle must be repaired or replaced. For this,
In the invention of the prior application, an opening / closing door having a so-called double door structure is provided on the side of the processing tank, and by opening the opening / closing door, foreign matter that has entered inside, cleaning, repair, and the like can be performed. In order to perform maintenance work to be performed, the inside of the processing tank can be opened quickly and smoothly.

Here, in order to prevent the above-mentioned trouble from occurring and to detect it at an early stage so as not to reach a fatal state, the inside of the processing tank can be constantly inspected. There is a need. Since this inspection needs to be performed on a daily basis, particularly at the time of startup, it is necessary to be able to easily inspect the inspection and to confirm the operation state of the entire paddle mixer provided in the processing tank. However, as described above, it is not always desirable to use the opening / closing door provided on the side of the processing tank to perform internal inspection. That is, when performing soil improvement treatment, a pressing force at the time of stirring acts on the side portion of the treatment tank, and the like. It is necessary to provide a locking means that can be firmly held, and cannot be easily opened and closed. Also, to inspect the entire paddle mixer at the same time,
This operation is extremely cumbersome, since multiple doors must be opened. In particular, since the opening / closing door is attached to the side surface of the processing tank via the hinge, there is a possibility that earth and sand, solidified material, and the like may enter the hinge at the time of opening / closing, and a smooth opening / closing operation may not be performed. Further, when it is necessary to inspect the inside of the treatment tank after the soil improvement processing is started, opening the opening / closing door may cause inconvenience such as earth and sand or soil improvement material overflowing from the opening.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and an object of the present invention is to keep a treatment tank in a closed state except a portion for introducing earth and sand and a soil improvement material and a portion for discharging improved soil. Therefore, it is an object to protect the soil improving material in the soil improving material hopper and to make the structure convenient for inspecting the inside of the treatment tank and performing maintenance.

[0013]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present invention provides a main body frame connected to a traveling means, which includes a soil hopper, a soil improvement material hopper, and earth and sand supplied from both hoppers. And soil improvement processing means for mixing the soil improvement material, the soil improvement processing means comprising a processing tank equipped with a screw-type mixing means for stirring and mixing the soil and soil improvement material. The treatment tank is composed of a closed long container, and an opening for introducing soil and soil improvement material at an upper portion on one end thereof and a discharging portion for improving soil at a lower portion on the other side are respectively opened. At least one inspection hole is formed at the upper position, and at least a part of the container wall is provided with a maintenance opening. These inspection holes and the maintenance opening can be opened and closed by closing members respectively. None assumed, it is an its features that it has a configuration in which further placing the soil improvement agent hopper at the top position of the processing tank.

Here, if the inspection hole provided in the upper part of the processing tank is provided at the upper position of the discharge part and at the intermediate position between the discharge part and the introduction part, the whole mixing means can be more effectively used. When a lid that can be opened and closed by a hinge is attached to these inspection holes, the opening and closing operation is facilitated. Since the inspection needs to be performed even after the soil improvement process is started, a configuration in which a net is attached to these inspection holes is excellent in securing safety at the time of the inspection. Further, an inspection hole is provided at or near the upper part of the discharge unit at the upper position of the processing tank, and a lid that can be opened and closed is attached to the inspection hole. A configuration may be adopted in which a maintenance opening having an openable / closable door mounted at a position is formed.

The mixing means provided in the processing tank may be constituted by a paddle mixer for transferring the earth and sand and the soil improving material from the introduction part to the discharge part of the processing tank while stirring and mixing. In this case, it is desirable that the side surface of the processing tank is formed in an arc shape larger by a predetermined dimension than the rotation trajectory of the paddle of the paddle mixer, because the entire inside of the processing tank can be stirred. Then, a maintenance opening is formed in the side surface of the processing tank, and a closing member is provided in the maintenance opening so as to be openable and closable.
It is desirable that the inner surface of the closing member has a wall surface shaped along an arc. Further, the closing member includes locking means for holding the maintenance opening in a closed state, and inclination holding means for holding the locking means at a position inclined by a predetermined angle with respect to the maintenance opening when the locking means is detached. If the configuration is such that the maintenance opening can be completely opened by pulling out the closing member held by the inclined holding means, it is extremely convenient for maintenance work. As the soil improvement material supplied from the soil improvement material hopper, various types of solidification materials and other types can be used depending on the purpose, and any type can be used. In the case of generated lime or the like, it is particularly advantageous to adopt the above-described configuration.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show the overall configuration of the self-propelled soil improvement machine. First, in FIG. 1, reference numeral 1 denotes a lower traveling body, and the lower traveling body 1 is provided with crawler-type means having a crawler belt 1a. Although the illustrated lower traveling body 1 is a crawler-type traveling means, taking into consideration the case where earth and sand are intermittently introduced, it is necessary to prevent the entire vehicle body from becoming unstable due to an impact load at the time of earth and sand introduction. This is to prevent it. Therefore, in the case where the earth and sand are continuously charged by a conveyor or the like, it may be configured by a wheel-type traveling body.

The lower traveling body 1 is provided with a body frame 2 constituting a chassis connected thereto.
Are provided with various mechanisms and devices. In the main body frame 2, when the left side in FIGS. 1 and 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 section 5 extends obliquely upward from a position below the processing mechanism section 4.
A machine room 6 containing machines such as an engine, a hydraulic pump, and a directional control valve unit is provided at an upper position of the machine room. The machine room 6 is supported by the main body frame 2.

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. . For this purpose, the carry-in conveyor 10 is provided, and in the transport direction of the carry-in conveyor 10, the earth and sand hopper 20 is installed on the most upstream side, that is, the front side of the machine, and the soil improvement material hopper 30 is installed on the rear side. In addition, loading conveyor 1
The transport amount of the soil improving material is measured according to 0, and the supply amount of the soil improving material from the soil improving material hopper 30 is adjusted according to the measured amount.

As is apparent from FIG. 3, the carry-in conveyor 10 is provided so as to be inclined from the end of the main body frame 2 at a predetermined angle. The carry-in conveyor 10 includes a conveyor belt 11, and the conveyor belt 11
The driven wheel 13 and the driven wheel 14 are wound around and provided on the driven wheel 14 side, and a well-known tension adjusting mechanism is provided on the driven wheel 14 side. 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, on both left and right sides of the transport surface of the transport belt 11, regulating plates 16, 16 are located at positions upstream of the mounting portion of the earth and sand hopper 20.
The regulating plate 16 determines the height of the conveyance by the conveyance belt 11, whereby the conveyance amount of the earth and sand can be controlled. This conveyor 10
Is provided in an inclined state in which the downstream side is low and rises obliquely upward toward the upstream side.

The earth and sand hopper 20 is constructed as apparent from 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. And this earth and sand hopper 20
Of the four peripheral wall surfaces constituting the above, 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, and the wall surfaces 20b and 20c on both sides are carried in. Control plate 1 of conveyor 10
6 abuts. As a result, the end position of the carry-in conveyor 10 except for the upstream side thereof is
Are substantially closed by the wall surfaces 20a, 20b, and 20c of FIG.

The carry-in conveyor 10 in the earth and sand hopper 20
The lower end of the wall surface 20d located on the upstream side in the feed direction is arranged at substantially the same height as the height of the regulating plate 16,
As a result, the earth and sand supply port 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 pressure is applied to the earth and sand that has passed through the supply port 21 by an urging means such as a spring. Accordingly, the earth and sand hopper 20 supplies 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 supply port 21, and the pressing force of the pressing roller 22.

The earth and sand is not directly supplied to the earth and sand hopper 20. The sieve unit 23 removes solid foreign matters such as rocks, concrete, metal lumps, and the like, and reduces the bulk density of the earth and sand so that the inside of the earth and sand is reduced. The air is allowed to fall on the conveyor belt 11 after sufficient air is contained. As described above, by reducing the bulk density of the earth and sand, the earth and sand can be smoothly transported by the loading conveyor 10 with a light load. Therefore, as shown in FIGS. 6 and 7, the sieving unit 23 has a frame 24, and the grid members 25 are arranged vertically and horizontally at a predetermined pitch interval on the frame 24. Therefore, a mesh is formed by the vertical and horizontal pitch intervals of the grid member 25, and those having a particle size of this mesh size are selectively guided into the sediment hopper 20, and objects larger than that are placed on the grid member 25. Will remain.

Here, the sieve unit 23 may be configured as a fixed sieve, but is desirably a vibrating sieve. Note that there are various modes for configuring the vibrating sieve, but in the illustrated one, the sieve unit 23 is vibrated in the vertical direction. For this,
The sieving unit 23 is supported on the support member 18 so as to be able to vibrate vertically. A spring receiving member 26 is fixedly provided at the four corners of the frame 24, and a spring 27 is interposed between the support member 18 and the spring receiving member 26, so that the frame 24 is supported. It is elastically supported by the member 18. The vibration member 28 is connected to the lattice member 25, and the vibration member 28 causes the lattice member 25 to move up and down in the support frame 24. Vibration means 28
Has a vibration member 28b that is driven to rotate by a motor (electric motor or hydraulic motor) 28a.
b is a rotating drum, and the vibrating member 28b is
4 is connected to a vibration shaft (not shown) provided in
When the vibrating member 28b is rotationally driven by a, the entire sieve unit 23 is vibrated. As a result, the separation of the earth and sand from the solid matter is promoted, and the solid matter and the like separated at the upper part of the grid member 25 are removed by falling onto the ground on the near side along the vibration of the grid member 25 and the inclination thereof. You.

Next, as shown in FIGS. 8 and 9, four soil improvement material hoppers 30 arranged on the upstream side of the earth and sand transport direction by the carry-in conveyor 10 are provided on the main body frame 2. It is supported by a frame-shaped base plate 32 provided on a support 31. Therefore, the carry-in conveyor 10 includes the columns 31, 31.
A predetermined amount of soil improvement material is added to the earth and sand supplied from the earth and sand hopper 20 on the carry-in conveyor 10 to the earth and sand. Here, the soil improvement material is mixed with earth and sand in order to improve or modify the soil quality, and a material suitable for the purpose of each soil improvement and reforming is used. Here, in the soil improvement, in order to convert the inferior earth and sand into a material that is useful as a ground improvement or backfill soil, a solidification material is used as the soil improvement material, and lime is suitably used as the solidification material. Therefore, in the following description, lime is used as the solidifying material. However, soil improvement materials
In the case of solidifying materials other than lime or a mixture of various additives for accelerating solidification, as well as ground reforming and acid soil reforming, use appropriate soil improvement materials, respectively. be able to.

The soil improving material hopper 30 is composed of a storage tank 33 for storing a predetermined amount of lime, and a feeder 34 connected to a lower portion of the storage tank 33 and supplying a predetermined amount of lime. Here, the storage tank 33 has a substantially cylindrical shape, has a space for storing lime therein, and has a variable height dimension. Accordingly, the storage tank 33 includes a base portion 35 having a lower portion provided on the base plate 32 and having an open upper end, a top plate portion 36, and a bellows portion 37 provided between the base portion 35 and the top plate portion 36.
It is composed of The base 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 vertical direction. When the bellows portion 37 is extended, the operating state shown in FIG. It becomes possible to store a large amount of lime inside. FIG. 10 shows the bellows 37
When the storage state is set as described above, the height of the soil improvement machine is reduced as described later. Thereby, when performing the soil improvement process, the volume of the storage tank 33 is increased so that a large amount of lime can be stored, and when transporting the soil improvement machine, the storage tank 33 is stored. The height is suppressed so that the height is stored within the range of the height limit when the vehicle is transported on a road by a trailer or the like.

The base 35 in the storage tank 33 is
A bottom plate 35a and a circumferential body 35b are provided. As shown in FIG.
8 are provided. The stirring member 38 in the hopper is provided with a stirring blade 38a disposed near the bottom plate 35a inside the base portion 35 and connected to the stirring blade 38a.
And a motor 38c that rotates the rotating shaft 38b. In order to supply lime from the storage tank 33 to the feeder 34, the agitating member 38 in the hopper smoothly feeds lime from the communication hole 39 provided in the bottom plate 35a of the base 35 to the feeder 3.
4. In addition, an inspection door 40 that can be opened and closed is provided on the peripheral body 35 b of the base 35. In the drawing, reference numeral 39a denotes a lime take-out port, and the storage tank 33 is maintained even after the soil improvement processing is completed.
If there is still lime inside, one or more places are provided to discharge this lime,
a is configured to be openable and closable.

The top plate portion 36 is formed by bending an outer peripheral edge of a circular plate body downward, and a substantially circular opening 36a is formed at the center thereof. An openable / closable cover 41 is formed. Further, at positions outside the opening / closing lid 41, at least three hook locking members 42 are provided. 12 and 13, a cutter 43 is attached to the cutter supporting portion 43a below the portion of the top plate 36 where the opening / closing lid 41 is provided. Here, the lime is filled in the flexible container, and the lime is directly supplied from the flexible container to the storage tank 33. The cutter 43 is provided to cut off the lower end of the flexible container. The cutter 43 and its support arm 43a are connected to the top plate 36 so that lime from the flexible container cut by the cutter 43 reliably flows into the storage tank 33 and does not overflow or scatter around.
From a predetermined depth.

The bellows portion 37 is composed of a flexible sheet 37a having high strength and a ring-shaped support 37b fixed at a predetermined pitch in the vertical direction on the outer periphery of the flexible sheet 37a. When filling, bellows 3
7 serves as a shape retaining member for preventing the whole from bulging outward. The lower end of the flexible sheet 37a is
5 is fixed to the upper end of the peripheral body 35a, and the upper end is fixed to the ring 36b of the top plate 36.

The soil improving material hopper 30 has the bellows portion 37 which can be extended and contracted in the middle, so that the bellows portion 37 is extended in the operating state shown in FIG. In the stored state, it is necessary to hold the data fixedly. To this end, mounting plates 36b are provided on the top plate portion 36 so as to extend laterally at three locations at approximately 120 ° intervals, and each of the mounting plates 36b is provided with a support rod 45.
Is hanging. Further, the guide cylinders 4 are provided on the base plate 32 at positions corresponding to the positions where the support rods 45 are vertically provided.
The support rods 45 are slidably inserted into the guide cylinders 46, respectively. As a result, the guide cylinder 46 and the support rod 45 are fitted in a telescope shape, and the support rod 45 can penetrate the guide cylinder 46 and protrude downward.

This is for fixing the bellows portion 37 to each position of the operating state or the retracted state. The support rod 45 is provided with two pin insertion holes 45a and 45b at upper and lower positions. Indicates one pin insertion hole (not shown)
Are provided at predetermined positions. When the stopper pin (or screw) 47 is inserted in a state where the pin insertion hole 45a below the support rod 45 is aligned with the pin insertion hole of the guide cylinder 46, the bellows portion 37 is maintained in an extended operating state. You. On the other hand, the pin insertion hole 45 above the support rod 45
When the stopper pin 47 is inserted by aligning b with the pin insertion hole of the guide cylinder 46, the bellows portion 37 is held in the stored state.

The feeder 34 connected to the storage tank 33 is for supplying lime to the treatment tank 60 at a regulated supply amount. That is, as shown in FIGS.
The feeder 34 has a casing 48 fixed to the lower surface of the communication hole 39 in the storage tank 33.
8 has an inflow port 49a communicating with the communication hole 39 and a supply port 49b opened downward, and an intermediate wall surface thereof forms an arc-shaped quantitative supply section 49c.
Is provided with a rotor 50 rotatably. The rotor 50 is provided with a plurality of radially extending partitions 50a substantially in sliding contact with the inner wall surface of the fixed-quantity supply section 49c.
The amount of lime corresponding to the space between a and 50a, that is, a fixed amount of lime is supplied. Therefore, the supply amount of lime can be controlled by controlling the rotation speed of the rotor 50, and the supply amount of lime increases as the rotation speed of the rotor 50 increases. In order to rotationally drive the rotor 50, a rotating shaft 51 inserted into the casing 48 so as to be relatively non-rotatable is provided.
A pulley 51a is attached to the rotating shaft 51, and a power transmission means 53 such as a transmission belt is interposed between the pulley 51a and the output shaft 52a of the motor 52. I have. Here, in order to strictly control the supply amount of lime due to the rotation of the rotor 50, the motor 52
It is desirable to use a variable speed electric motor, but if it is configured to make the rotation speed variable by a flow control valve or the like,
It may be constituted by a hydraulic motor.

As described above, earth and sand and lime are conveyed by the conveyor belt 11 constituting the carry-in conveyor 10, and the end of the carry-in conveyor 10 is used to stir and mix the earth and sand and lime in the processing mechanism 4. Processing tank 6 as a mechanism to perform
Connected to 0. 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. The soil improving material hopper 30 is arranged at a predetermined interval above the processing tank 60.

FIGS. 17 to 20 show the processing mechanism section 4.
2 shows the internal configuration of the processing tank 60 that constitutes FIG. First, FIG.
As is clear from FIG. 18, an inlet 62 forming an inlet is provided at an upper part on the front side of the processing tank 60, and an outlet 63 forming a discharge part is connected at the lower part on the rear side. The other parts have a closed structure. This is an upper part of the treatment tank 60, and the soil improving material hopper 30 is disposed at a position close to it,
This is because the lime which solidifies when it comes into contact with moisture is stored in the soil improving material hopper 30, and the steam generated when processing the soil containing a large amount of water in the treatment tank 60 generates the soil improving material hopper 30. In order not to be emitted in the direction of.

As shown in FIGS. 19 and 20, two paddle mixers 64 are provided in the processing tank 60 in parallel. The paddle mixer 64 has a rotating shaft 65, on which a large number of paddles 66, which are intermittently provided blades as stirring / transfer members, are implanted at a predetermined angle. When 65 is rotated, paddle 66
Is rotated and the inside of the processing tank 60 is stirred, and the earth and sand and the lime introduced into the processing tank 60 are transferred to the discharge port 63 side while being stirred and uniformly mixed. Then, this transfer amount changes according to the angle of the paddle 66.

As described above, in the present embodiment, two paddle mixers 64 are provided, and
Are arranged at positions where the phase is 90 °. However, the number of the paddle mixers 64 and the arrangement intervals of the paddles 66 are determined by the relationship between the height and width of the processing tank 60. For example, if the height of the processing tank 60 is increased, a large paddle having a large turning radius can be attached.
Although the number of paddle mixers 64 may be small, the processing tank 60
When the height dimension of the paddle is reduced and the width is increased, the radius of rotation of the paddle becomes small, so that the number of paddle mixers is increased. Therefore, in order to have a predetermined stirring efficiency,
The size of the processing tank 60 and the number of the paddle mixers 64 may be appropriately set depending on the relationship between the width of the main body frame 2 and the height of the entire vehicle. However, in order to smoothly and efficiently mix, stir, and transfer the soil and lime in the treatment tank 60, the number of the paddle mixers 64 is an even number, and the adjacent paddle mixers 64, 64 are in opposite directions. It is desirable to set so that it rotates.

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. The output shaft of a hydraulic motor 70 is connected to one of the transmission gears 69, and by rotating this hydraulic motor 70, both rotating shafts 65, 65 provided with paddles 66 are simultaneously rotated in opposite directions. Drive.

Here, the processing tank 60 has an upper surface 60a, an upper side surface 60b formed in a rectangular frame shape, and a main body portion 60c fixed to the lower end of the upper side surface 60b by welding or the like.
, And the main body 60c has a double concave curved surface shape substantially coinciding with the rotation locus of the paddle 66. The stirring and mixing of the earth and sand with the solidified material by the paddle mixer 64 are performed substantially inside the main body 60c or from the main body 60c to the lower part of the upper side surface part 60b, and furthermore, the earth and sand or lime is removed at the lower corners and the like. To prevent stagnation. On the other hand, the upper side of the upper side surface 60b and the upper surface 60a are agitated.
Soil and solidified materials that are mixed do not directly reach.

The upper surface 60a is a lid of the processing tank 60, which prevents the earth and sand and solidified material from being scattered when the paddle mixer 64 is operated, and the water vapor and the like generated in the processing tank 60 from being discharged upward as it is. This is to prevent it. Here, the upper surface 60a may be formed of a single plate body. However, since the upper surface 60a is removed at the time of maintenance work as described later, for example, the upper surface 60a may be formed with a portion where the inlet 62 is formed. , Three plate members 60a disposed at a portion located above the outlet 63 and an intermediate portion thereof.
F, 60aR, and 60aM, and desirably connected to the upper side surface 60b by means such as bolts so as to be detachable.

As described above, the processing tank 60 is connected to the inlet 62.
Although the portion except for the outlet 63 has a closed structure, solid foreign matter or the like enters the processing tank 60,
There is a possibility that the smooth operation of the paddle mixer 64 may be impaired, or in extreme cases, the operation of the paddle mixer 64 may be stopped. When a solidifying material such as lime or cement is used as the lime, if the lime is left in the processing tank 60 while remaining, it may stick to the inner surface of the processing tank 60 or the paddle 66. Further, the paddle 66 may be worn over a long period of time. Therefore, the processing tank 60
To remove foreign matter that has entered the interior, clean it,
In addition, so-called maintenance work for repairing or replacing parts is required. Also, in order to determine whether maintenance work is required, what kind of maintenance work is needed, and the timing of performing the maintenance work,
An internal inspection of the processing tank 60 is also required.

For this purpose, an opening for maintenance is formed on the side surface of the processing tank 60, and a required opening portion (three in the drawing) is provided with a closing member 71 which can be opened and closed. The closing member 71 is provided not only on one side surface of the processing tank 60 but also on the opposite side surface. Also,
Two small openings are provided on the upper surface of the processing tank 60, and these openings have cylindrical inspection port members 7.
2 and 73 are provided, and these inspection port members 72 and 7 are provided.
Opening / closing lids 74 and 75 are detachably connected to 3 by hinges or the like. Further, the opening / closing lids 74, 75 are provided with locking means 74a, 75a.
4a, 75a allow the opening / closing lids 74, 75 to hold the inspection port members 72, 73 in a closed state.

The inspection port members 72 and 73 are provided so that the operation state of the inside of the processing tank 60, particularly, the operation state of the paddle mixer 64 can be confirmed from the upper side.
Since the two paddle mixers 64 are mounted, the inspection port members 72 and 73 are connected to the two paddle mixers 64 and
64, the inspection port member 72 is provided at an upper position of the discharge port 63, and the inspection port member 73
Is disposed at a substantially intermediate position between the inspection port member 72 and the introduction port 62. Since the inlet 62 is always open, the inlet 62 also functions as an opening for internal inspection. Therefore, the inlet 62 and the opening / closing lids 74 and 7 are provided.
If the inspection port members 72 and 73 are sequentially viewed with the 5 opened, almost the entire inside of the processing tank 60 can be inspected.

Here, the inspection is performed on the base plate 3 on which the processing tank 60 and the soil improving material hopper 30 arranged on the processing tank 60 are mounted.
2 can be carried out by sticking the neck of the person performing the inspection. The inside of the processing tank 60 can be inspected while the paddle mixer 64 is operated. Further, the inspection opening members 72 and 73 are provided with protective nets 76, respectively, so that an operator's hand or the like cannot be inserted during the inspection. Moreover, since the stirring force of the earth and sand and the solidified material by the operation of the paddle mixer 64 does not reach the positions of the inspection port members 72 and 73,
The locking means 74a and 75a may have any configuration as long as the locking means 74a and 75a can be held to such an extent that the vehicle does not rattle due to the vibration of the vehicle, and the opening and closing operations thereof are facilitated.

On the other hand, the maintenance work requires an opening as wide as possible. This is why the closing member 71 is provided on the side of the processing tank 71. The configuration of an opening / closing mechanism for opening / closing a maintenance member provided in the processing tank 60 of the closing member 71 will be described with reference to FIGS. FIG. 21 shows a state in which the closing member 71 is mounted, and FIG. 22 shows a state in which the opening / closing lid 72 is removed. Further, FIG. 23 shows the closing member 71 on one side of the processing tank 60 in a half-open state and the closing member 71 on the other side in a closed state. Thus, a mounting frame 77 is fixedly provided at the maintenance opening where the closing member 71 is mounted, and a connecting member 78 is provided on the mounting frame 77 at one or more locations on each side. The connecting member 78 has a thumbscrew 79 pivotally attached thereto. The closing member 71 is provided with a plurality of fastening plates 80 projecting from the tip side so as to correspond to the positions where the thumb screws 79 are provided, respectively. Halfway through, slits 81 are formed at intervals slightly wider than the outer diameter of the screw shaft of the thumb screw 79.

Therefore, as shown in FIG.
After the closing member 71 is joined to the mounting frame 77 with the 9 being bent with respect to the connecting member 78, when the thumb screws 79 are set up, each of the thumb screws 79 enters into the slit 81 of the fastening plate 80. In this state, by screwing and tightening the nut portion of the thumbscrew 79, the closing member 71 can be fixed as shown in FIG. When the closing member 71 is closed, the inner plate 71 is closed.
a constitutes a part of the main body portion 60c of the processing bath 60, and therefore, the inner surface plate portion 71a has a curved surface shape that matches the curved surface shape of the main body portion 60c. Has an almost completely continuous concave surface shape. Here, this inner surface plate portion 71a
A small gap is formed between the inner wall of the main body 60c in the processing tank 60 and the main body 60c of the processing tank 60. Is a substantially uniform surface.

The closing member 71 is further opened in a half-open state shown in FIG. 23, that is, the closing member 71 is opened. However, the closing member 71 is not completely separated from the mounting frame 77 but can be held at a predetermined angle. Has become. For this purpose, a pair of stopper plates 82 are fixedly provided so as to extend downward on the closing member 71, and the processing tank 60 is provided with a small gap outside the both stopper plates 82. A pair of regulating plates 83 are attached. The regulating plate 83 is mounted so that the plate surface faces in the vertical direction, and the upper end thereof is in contact with the lower end surface of the closing member 71 or faces with a slight gap. An inclined receiving portion 83a inclined at a predetermined angle is formed on the side. In the drawing, reference numeral 84 denotes a handle for opening and closing the closing member 71.

With the above construction, when the thumb screw 79 fixing the closing member 71 is detached, the lower end of the closing member 71 first comes into contact with the regulating plate 83, and the load of the closing member 71 is reduced. Is received by the regulating plate 83. In addition, since the stopper plate 82 extends at a position inside the both regulating plates 83 in the closing member 71, the closing member 71 is held substantially fixed in the front-rear direction.
When the handle 84 is gripped and the closing member 71 is tilted forward, the inclined receiving portion 83a of the regulating plate 83 comes into contact with the surface of the closing member 71, and the stopper plate 82 engages with the mounting frame 77. The closing member 71 is held substantially fixed in that position. Here, processing tank 6
Reference numeral 0 is fixed to the main body frame 2, and since the main body frame 60 extends on both left and right sides of the processing tank 60, the closing member 71 is supported by the engagement between the stopper plate 82 and the mounting frame 77. Rather, for more stable support, as shown in FIG. 23, the support can be made to abut on the main body frame 2. Of course, if the closing member 71 is pulled out from this state in the direction of the arrow in FIG. 23, the closing member 71 can be completely separated from the processing tank 60.

The present embodiment is configured as described above, and improves the soil quality of the earth and sand generated by excavation and the like by the treatment tank 60. For this purpose, a means for charging the earth and sand into the earth and sand hopper 20 is required. Become. For example, a hydraulic shovel or the like can be used as a means for charging the earth and sand. Therefore, the excavator is scooped up with a bucket of a hydraulic shovel and thrown into a sand 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,
Lime is supplied from the soil improvement material hopper 30 and supplied onto the surface of the earth and sand. A mixture of earth and sand and lime is fed into the processing tank 60 from the end of the carry-in conveyor 10 through the inlet 62, and the sand and lime are discharged while being stirred and mixed by the action of the paddle mixer 64 provided in the processing tank 60. Exit 6
It moves to the position of 3. The soil and lime are uniformly mixed in the treatment tank 60 to produce an improved soil in a state of aggregate. The improved soil can be deposited at a predetermined position from the discharge port 63 by the improved soil discharge unit 5 including a discharge conveyor.

Incidentally, there is a possibility that various foreign matters are mixed in the earth and sand. When the earth and sand is put into the earth and sand hopper 20 by a hydraulic excavator or the like, most of the foreign matters can be removed by the sieving unit 23, but the paddle mixer 64 is still required. There is a possibility that foreign matter that affects the operation of the processing tank 60 may enter the processing tank 60. In addition, since the processing of solidifying the earth and sand is performed in the processing tank 60, if the contents of the processing tank 60 are not completely discharged after the processing operation is completed, the earth and sand solidified by the solidified material may be generated on the inner surface of the tank or the like. It adheres to the paddle 66, the rotary shaft 65, and the like that constitute the paddle mixer 64, and sticks.
Further, since the paddles 66 constituting the paddle mixer 64 are worn during the soil improvement process, the paddle mixers 64 need to be replaced at an appropriate time.

From the above points, first, the inside of the processing tank 60 must be frequently inspected to confirm whether or not the soil improvement processing can be performed smoothly. Inspection port members 72 and 73 are provided on the upper surface 60a of the processing tank 60,
Since the opening / closing lids 74 and 75 are provided in the inspection port members 72 and 73, the interior of the processing tank 60 can be easily inspected by opening the opening / closing lids 74 and 75. By looking through the inlet 62 in addition to the inspection port members 72 and 73, it is possible to confirm almost the entire movement of the paddle mixer 64 in the processing tank 60. Here, processing tank 6
Although the soil improvement material hopper 30 is disposed in the upper part of 0, at least the carry-in conveyor 10 is interposed between the soil improvement material hopper 30 and the processing tank 60, and there is a certain interval between them. The opening / closing lids 74 and 75 do not cause any particular trouble in opening / closing and looking in.

Therefore, for example, by inspecting the inside of the processing tank 60 immediately before the start of the soil improvement processing and checking the amount of sticking of the soil and lime, it is possible to confirm whether the processing tank 60 operates normally. In addition, due to this inspection, processing tank 6
The timing of internal cleaning of 0 can be accurately determined. When an abnormality occurs in the operation state of the paddle mixer 64, for example, when the vibration of the processing tank 60 becomes violent or the resistance to the rotation of the rotating shaft 65 becomes large, the inspection port member 7 is opened.
The cause can be easily investigated by looking at the reference numerals 2, 73 and the inlet 62. In order to confirm such a trouble, the paddle mixer 64 needs to be in the operating state. However, the inspection port members 72 and 73 are provided with the net body 76 so that a hand or the like cannot be inserted into the inside. Because
The safety of the inspection work performed while rotating the paddle mixer 64 is ensured. The inlet 62 is always open, and no special protection member is provided. However, since the carry-in conveyor 10 faces the inlet 62,
It is difficult to insert a hand or the like into the inlet 62.

On the other hand, the maintenance work can be performed by detaching the closing member 71 provided on the side of the processing tank 60 from the mounting frame 77. Thus, at the time of maintenance work that can be performed easily such as removing solid foreign matter, the closing member 71 is placed in the half-open state shown in FIG. here,
Since the weight of the closing member 71 in the half-open state is received by the regulating plate 83, the opening / closing operation can be easily performed.

When performing maintenance work such as internal cleaning and repair / replacement of parts, if the closing member 71 is kept in a half-open state, the closing member 71 may be an obstacle. In such a case, the closing member 71 is pulled out in the direction of the arrow from the state of FIG. 23, and as shown in FIG.
The inside of the mounting frame 77 is completely opened.

Further, when completely cleaning the inside or the like, it may be necessary to open not only the side of the processing tank 60 but also the upper part. In this case, the processing tank 60
By separating the upper surface 60a from the upper side surface 60b. The upper surface 60a is composed of three plate members 60aF, 6
Since it is composed of 0aR and 60aM, maintenance of an appropriate portion can be performed by removing at least one of these plates. As described above, by configuring the upper surface 60a with three plate members, the weight at the time of attachment and detachment can be reduced, so that the workability is improved.

Since the base plate 32 on which the soil improving material hopper 30 is mounted is disposed at an upper position of the processing tank 60, it obstructs maintenance work from the upper side of the processing tank 60. For this reason, the base plate 32 is configured as an elevating support member for the soil improving material hopper 30 capable of elevating. The raising and lowering mechanism of the base plate 32 is used to expand and contract the bellows 37 of the storage tank 33 described above in the vertical direction.
It is provided between the mounting plate 36b of the top plate 36 and the base plate 32, and has substantially the same structure as a telescope-shaped height adjustment mechanism. That is, as shown in FIGS. 24 and 25, the support column 31 for supporting the base plate 32 on the main body frame 2 is composed of a support rod 100 and a guide cylinder 101 into which the support rod 100 is inserted. The rod 100 is the base plate 3
2 is provided on the lower surface. A guide tube 101 is provided upright on the main body frame 2.
01, a support rod 100 is inserted.
The distance between the base plate 32 and the processing tank 60 can be adjusted by adjusting the length of fitting of the base plate 32 to the guide tube 101.

The base plate 32 is moved to such an extent that the lime does not fly around when the feeder 34 of the soil improving material hopper 30 provided on the base plate 32 is close to the carrying surface of the carry-in conveyor 10 and lime is supplied to the carry-in conveyor 10. Figure 24 in close proximity
In the state where the opening and closing door 73 can be opened upward and the upper surface 60a is detached, the operator can set the processing tank 60
25 can be displaced up and down between the maintenance position shown in FIG. 25 in which the base plate 32 is raised to a position where the maintenance can be performed smoothly. Then, in order to move the base plate 32 up and down between the operating position and the maintenance position and to be able to hold the base plate 32 fixedly at these positions, one pin insertion hole is provided in the guide cylinder 101 at a predetermined position. In addition, two pin insertion holes 100a and 100b are formed vertically on the support rod 100 side. Guide tube 101
When the stopper pin 102 is inserted through the pin insertion hole 100b on the side and the pin insertion hole 100b on the lower side in alignment with each other, the base plate 32 is held at the lowered operation position, and the base plate 32
Is pulled up, and the pin insertion hole 10 on the upper side of the support rod 100 is pulled up.
When the stopper pin 102 is inserted by aligning the pin 0a with the pin insertion hole of the guide cylinder 101, the base plate 32 is
The processing tank 60 is held at a maintenance position in which the upper part of the processing tank 60 is opened far apart from the upper part of the processing tank 60. As a result, the maintenance worker can use the wide space formed between the base plate 32 and the processing tank 60 as a space for maintenance, and can perform a smooth maintenance operation.

Here, the vertical movement of the base plate 32 between the operating position and the maintenance position can be easily performed by using a crane. Thus, the soil improving material hopper 30 is filled with lime in the storage tank 33, and this filling operation is performed from a flexible container. Since the soil improving material hopper 30 is located at a high place, the opening / closing lid 41 provided on the top plate portion 36 is opened, and the flexible container is suspended, and inserted into the storage tank 33 from the opening / closing lid 41. Must. For this purpose, the main body frame 2 is provided with a crane 110 at a position on one side thereof. This crane 110
As shown in FIG.
0a, a support member 110b is erected on the revolving portion 110a, and a base end of an arm 110c that expands and contracts in a telescopic manner is pivotally supported on the support member 110b.
It is configured so that it can be raised at 0d. A hook 111 is connected to the tip of the arm 110c via a wire 112, and the hook 111 is moved up and down by winding up and down the wire 112. This crane 11 is used to raise and lower the base plate 32 on which the soil improvement material hopper 30 is installed.
0 is used.

The hook locking member 42 is provided on the top plate portion 36 of the storage tank 33 in the soil improvement material hopper 30.
When the hook 111 is pulled up by hooking the suspension wire 113 on the hook 111 of the crane 110, the base plate 32 can be raised from the operating position to the maintenance position.
Is lowered, the base plate 32 can be lowered from the maintenance position to the operating position. However, this base plate 32
Up and down is performed with the stopper pin 102 detached. Further, the stopper pin 102 is mounted to fix the relative positional relationship between the support rod 45 vertically suspended from the mounting plate 36b of the top plate 36 of the soil improvement material hopper 30 and the guide cylinder 46. When the hook 47 is lifted and lowered with the 47 attached and detached,
The bellows 37 constituting the storage tank 33 expands and contracts in the vertical direction. As a result, the storage tank 33 is displaced between the operating state shown in FIG. 8 and the storage state of the bellows 37 shown in FIG. be able to.

Here, as a member mounted on the side of the processing tank 60 and closing the maintenance opening,
21 to 23 as well as the opening and closing door 90 shown in FIGS. 27 and 28. The opening / closing door 90 has an inner surface plate portion 90 a in which the inner surface of the main body portion 60 c in the processing bath 60 has a substantially continuous concave curved surface shape, and closes an opening 91 for maintenance formed in a side portion of the processing bath 60. For this purpose, a pair of brackets 90b are extended downward at the lower ends thereof, and hinges 93 are connected between the brackets 92 and the support arms 92 provided on the main body 60c of the processing tank 60. And the upper side surface 60
b, a pair of hooks 94 are fixedly provided at positions on both sides of the opening / closing door 90, and the hooks 94 are provided at both ends of a shaft 95 which is supported on the opening / closing door 90 by a shaft support 90c so as to be movable in the horizontal direction. A fixedly provided engaging member 96 is engaged. An operation lever 97 is connected to an intermediate portion of the shaft 95 and extends downward. A stopper 98 is fixedly provided on the surface of the opening / closing door 90, and a lever housing 98a is formed on the stopper 98 at a locking position where the engaging member 96 faces the hook 94. Operation lever 9
Numeral 7 is a thin metal plate having elasticity. The operating lever 97 can be elastically deformed in a direction away from the surface of the opening / closing door 90 to be housed / separated in the lever housing portion 98a of the stopper 98. The engaging member 96 can be detached from the hook 94 by shifting the engaging member 97 in the lateral direction with the detachment from the stopper 98. In the drawing, reference numeral 99 denotes a handle for opening and closing operation.

With the above configuration, the operation lever 97
By operating, the opening and closing operation of the opening and closing door 90 can be performed between the closed state shown by the solid line and the open state shown by the virtual line. Here, the opening / closing door 90 is opened downward, so that the opening / closing door 90 can be held in a state opened by a predetermined angle. The means for holding the door 90 is the main body frame 2 or the support arm 92 as in the case of the closing member 71.

Further, in order to make the maintenance work on the upper side of the processing tank easier, an opening / closing door 161 can be provided on the upper surface 160a of the processing tank 160 as shown in FIG. Here, the processing tank 160
Since the soil and the like hardly adhere to the upper surface 160a side, the opening / closing door 161 can be hingedly connected to the upper surface 160a by a hinge. The opening / closing door 161 has a processing tank 16.
Since no pressing force or the like in the direction of pushing up from the inside of 0 is applied, no locking means is provided or a simple locking means is provided.

By the way, an inlet is provided in the processing tank,
A carry-in conveyor is connected to this inlet, but in order to minimize the release of water vapor, the distance between the carry-in conveyor and the inlet is made as small as possible, and the earth and sand and soil improvement material carry-in conveyor is connected to the inlet. It is necessary to reduce the head to reach. To do this, as shown in FIG.
An oblique notch 262a is provided at a portion where the inlet 262 of the processing tank 260 is formed, and a notch 260a is also formed at an end surface of the processing tank 260, so that the carry-in conveyor 10 is partially fitted into the notches 260a and 262a. And attach it. Accordingly, even when the opening area of the inlet 262 is reduced, when the earth and sand and the soil improvement material are supplied from the carry-in conveyor 10 to the inlet 262, the material is not scattered to the surroundings. Further, since the height position of the carry-in conveyor 10 is reduced, the height dimension of the soil improvement material hopper 30 located at the upper part of the carry-in conveyor 10 can be increased accordingly, and the amount of stored lime can be increased.

[0062]

As described above, the present invention is constructed as described above, and the steam or the like generated inside the processing tank degrades the soil improving material in the soil improving material hopper disposed above the processing tank. It is possible to suppress the solidification of the processing tank, and to easily perform the inspection and maintenance work inside the processing 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 soil improvement processing 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 a soil improvement material hopper 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 hopper in a stored state.

11 is a cross-sectional view of a base part forming a storage tank in the soil improvement material hopper of FIG.

FIG. 12 is a plan view similar to FIG. 9 with the opening / closing lid removed.

FIG. 13 is a cross-sectional view taken along the line BB of FIG. 9, with the base portion omitted.

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 the line CC of FIG. 14;

16 is a sectional view taken along line DD of FIG.

FIG. 17 is a plan view of a processing tank in one embodiment of the present invention.

18 is a front view of FIG.

FIG. 19 is a sectional view taken along line EE of FIG. 17;

20 is a sectional view taken along line FF of FIG. 17;

FIG. 21 is a front view showing a configuration of a closing member for closing a maintenance opening formed in the processing tank according to the embodiment of the present invention, and showing the closing member in a closed state.

FIG. 22: At the same position in FIG. 21 in the processing tank,
It is a figure showing the state where the closing member was removed.

23 is a cross-sectional view showing the closing member of FIG. 21 in a half-open state on one side of the processing tank and a closed state on the other side.

FIG. 24 is an operation explanatory view showing a state in which the distance between the base plate on which the soil improvement material hopper is mounted and the processing tank according to the embodiment of the present invention is adjusted, and FIG. It is.

FIG. 25 is an operation explanatory view showing a state in which the distance between the base plate on which the soil improvement material hopper is mounted and the processing tank according to the embodiment of the present invention is adjusted, and FIG. It is.

FIG. 26 is an explanatory view of the operation of the crane for raising and lowering the base plate on which the soil improvement material hopper is mounted according to the embodiment of the present invention.

FIG. 27 is a cross-sectional view showing another example of the closing member according to the embodiment of the present invention, and showing the closing member in a closed state.

FIG. 28 is a sectional view of FIG. 27;

FIG. 29 is a plan view showing another configuration example of the processing tank in the embodiment of the present invention.

FIG. 30 is a cross-sectional view of a main part of still another processing tank according to an embodiment of the present invention.

[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 12 Sieving means 30 Soil improving material hopper 31 Support column 32 Base plate 33 Storage tank 34 Feeder 35 Base part 36 Top plate part 60 , 16
0,260 Processing tank 60a Upper surface 60b Upper side surface 60c Main body 64 Paddle mixer 65 Rotating shaft 66 Paddle 71 Closing member 71a Side plate 72,73 Inspection port member 74,75
Opening / closing lid 77 Mounting frame 79 Thumb screw 80 Fastening plate 82 Stopper plate 83 Regulatory plate 90, 161
Door

 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Toshikazu Murai 650, Kandamachi, Tsuchiura-shi, Ibaraki Prefecture Within the Tsuchiura Plant of Hitachi Construction Machinery Co., Ltd. Inside the Tsuchiura Plant (72) Inventor Yasuharu Yamamoto 1-1, Yashita, Gasanki-cho, Okazaki City, Aichi Prefecture Hitachi Construction Machinery Co., Ltd. No. 2 Date R-Construction Machinery Co., Ltd. F-term (reference) 2D040 AB09 AC05 CA03 CD07 EB04 4D004 AA32 AC07 BA02 CA15 CA34 CB28 CC12 4G078 AB20 BA01 BA07 DA01 DB02

Claims (7)

[Claims] An earth and sand hopper, a soil improvement material hopper, and soil improvement treatment means for mixing soil and soil improvement material supplied from both hoppers are installed on a main body frame connected to a traveling means, This soil improvement treatment means is a self-propelled soil improvement machine comprising a treatment tank equipped with a screw-type mixing means for stirring and mixing earth and sand with the soil improvement material. A container is formed, and an introduction portion for soil and soil improvement material is opened at an upper portion on one end side, and a discharge portion for improved soil is opened at a lower portion on the other side, and at least one inspection hole is formed at an upper portion. In addition, at least a part of the container wall is provided with a maintenance opening, and the inspection hole and the maintenance opening can be respectively opened and closed by a closing member. A self-propelled soil improvement machine, characterized in that the soil improvement material hopper is arranged on the soil. 2. An inspection hole provided at an upper portion of the processing tank is provided at an upper position of the discharge portion and at an intermediate position between the discharge portion and the introduction portion, and the inspection holes can be opened and closed by a hinge. The self-propelled soil improvement machine according to claim 1, wherein a lid is mounted. 3. The self-propelled soil improvement machine according to claim 2, wherein a net is attached to the inspection hole. 4. An inspection hole is provided at an upper position of or near the discharge unit at an upper position of the processing tank, and a lid which can be opened and closed is attached to the inspection hole, and a position at which the inspection hole is formed. 2. The self-propelled soil improvement machine according to claim 1, wherein a maintenance opening having an openable and closable door is formed at a position between the opening and the introduction portion. 5. The self-propelled vehicle according to claim 1, wherein said mixing means is constituted by a paddle mixer for transferring earth and sand and a soil improvement material from said introduction part to said discharge part of said processing tank while stirring and mixing. Type soil improvement machine. 6. A side surface of the processing tank is formed in an arc shape that is larger by a predetermined dimension than a rotation locus of a paddle of the paddle mixer, and the maintenance opening is formed in a side surface of the processing tank. The self-propelled soil improvement machine according to claim 5, wherein the closing member is provided in the opening for opening so as to be openable and closable, and the inner surface of the closing member has a wall surface shaped along the arc. 7. The closing member is provided with locking means for holding the maintenance opening in a closed state, and at a position inclined by a predetermined angle with respect to the maintenance opening when the locking means is detached. 7. The self-propelled soil according to claim 6, further comprising a tilt holding means for holding, wherein the maintenance opening can be completely opened by pulling out a closing member held by the tilt holding means. Improved machine.