JP2001317042A - Mixed material feeding device of soil improving machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To certainly prevent a fine powder-like soil improving material, etc., from being scattered to the surroundings during soil improving treatment. SOLUTION: A tunnel member 100 mounted on a mixed material carrying path from a soil hopper 20 to an introduction part 41 of a mixing container 40 is composed of right and left side-surface covers 101, 101 and a ceiling cover 102 mounted across the covers 101, 101. The cover 101 is connected to a regulation plate 16 of a mixed material carrying conveyor 10. One end of the cover 101 is made a flange part 100a abutting on the end wall 20a of the soil hopper 20, and the other end thereof is made to change direction downward in the inversion part of the conveyor 10. A flange part 100b abutting on the periphery of the introduction port 41 of the cylindrically protruding mixing container 40 is formed in the other end of the cover 101. Furthermore, an opening 102a for introduction is formed in the ceiling cover 102, and a cylindrical body 103 for connection, which is mounted on a feeder 32, is guided through the medium of the opening 102a to the inside of the tunnel member 100.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a soil improvement machine for improving the quality of earth and sand to meet a predetermined purpose, for example, to improve soft ground and strengthen the ground. More particularly, the present invention relates to a mixed material supplying apparatus for a soil improving machine which can supply a soil improving material to a mixing means without scattering the material to the outside.

[0002]

2. Description of the Related Art For example, in improving or strengthening the ground, a soil improvement machine is used to produce an improved soil in which a soil improvement material made of a solidified material or the like is uniformly mixed with earth and sand. This soil improvement machine stirs the soil and soil improvement material.
A mixer for mixing, and a means for supplying earth and sand and soil improving material to the mixer,
For example, a mixing type soil improvement machine disclosed in Japanese Patent Application Laid-Open No. 2000-45263,
A crushing type soil improvement machine and the like disclosed in Japanese Patent No. 95265 are conventionally known. These soil improvement machines have crawler-type running means, are small and compact, and are portable, so that soil and sand generated by excavation and the like are deposited at predetermined positions, and soil improvement is performed. The machine can be transported to the site where the soil is deposited, where the soil can be improved.

[0003] Here, the structure of the mixing means is different between the mixing type soil improvement machine and the crushing type soil improvement machine, but the mixed materials supplied to the mixing means are soil and soil improvement material. However, there is no particular difference in the configuration of the supply means. That is, the mixed material supply device includes a soil hopper, a soil improving material hopper, and a mixed material transport conveyor that transports the mixed material supplied from the soil hopper and the soil improving material hopper to the mixing means. Specifically, a frame-shaped earth and sand hopper is provided on a conveyor belt constituting the mixed material conveyor, and earth and sand is charged into the earth and sand hopper. Further, the soil improvement material hopper includes a storage tank for the soil improvement material and a feeder that supplies the soil improvement material to the mixed material conveying conveyor almost continuously in a constant amount. However, the supply position of the soil improvement material is generally located on the front side, that is, on the downstream side from the supply position of the earth and sand. Therefore, the soil improvement material is dropped by its own weight from a position separated by a predetermined distance from the conveyor belt. Configured to supply.

[0004] The soil improvement machine having the above structure is used for treating earth and sand generated by burying gas pipes and the like, water and sewage works, other road works, foundation works, and the like. The city or its suburbs. For example, taking foundation work for constructing a building such as a large building as an example, the amount of excavated soil converted into improved soil required in this foundation work is extremely large, and If the soil is transferred to the plant for soil improvement treatment and the resulting improved soil is carried to the foundation work site, the dump truck for transporting the earth and sand and the improved soil must be moved frequently. Instead, it can cause traffic obstacles.

[0005] A portable soil improvement machine can effectively cope with such a situation. In other words, in performing the foundation work,
For example, excavating earth and sand with a hydraulic excavator, making it necessary for soil improvement to be deposited at a predetermined position on this site, and when a certain amount of soil is deposited, after transporting the soil improvement machine by a trailer or the like, It is possible to improve the soil quality by self-propelled to the sedimentation area. As a result, traffic obstacles can be suppressed, and transportation costs for earth and sand and improved soil can be reduced, which is extremely advantageous in terms of processing costs and the like.

[0006]

As already explained,
The soil to be improved is generated in or near a city, and the soil improvement process is an outdoor operation. Therefore, when performing soil improvement processing, it is necessary to take care not to scatter dust and dust in order to preserve the surrounding environment. Even when the earth and sand is put into the earth and sand hopper with a hydraulic shovel, etc., and the soil improvement material is supplied from a position away from the mixed material conveyor, the amount of earth and sand transported on the mixed material conveyor is kept to some extent. Since there,
The feeder does not need to be very far from the mixed material conveyor. Further, the mixing means is provided with a mixing means and a crushing means inside a housing such as a mixing container or the like, so that scattering of dust and dust can be suppressed. Furthermore, in the case of the mixing method, the improved soil generated in the mixing vessel is subjected to dust or dirt on the discharge side because the soil improvement material to be scattered adheres to the surface of the soil or is taken into the soil. There is no scattering of dust.

[0007] However, depending on weather conditions, if soil improvement processing is performed on a particularly windy day, dust and dust may be scattered by the wind during that time. The scattering of the earth and sand is not so serious, and if the scattering seems to be severe, the scattering can be suppressed by watering or the like. On the other hand, such measures cannot be taken for soil improvement materials. In particular, when the purpose of the soil improvement material is to solidify earth and sand such as ground reinforcement, a solidification material containing lime, cement, or the like as a main component is used. Therefore, when lime, cement and the like are scattered in the form of fine powder, the degree of contamination of the surrounding environment becomes serious. For this reason, in a residential area or the like, depending on weather conditions, such as a windy day, the soil improvement process must be stopped.

The present invention has been made in view of the above points, and an object of the present invention is to prevent the fine powdery soil improving material or the like from scattering around during the soil improving process. The purpose is to ensure prevention.

[0009]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present invention is provided for a soil improvement machine having a mixing means for uniformly mixing earth and sand and a soil improvement material. Soil hopper provided with a storage tank in a closed state, a feeder connected to the storage tank, and a mixing and conveying method in which the soil improving material from the feeder is added to the earth and sand supplied from the earth and sand hopper. A mixed material supply device for a soil improvement machine having a configuration including a material transport conveyor, wherein the mixed material transport path includes:
The tunnel from the outlet of the earth and sand hopper to the mixing means is covered with a tunnel member for preventing scattering of the soil improving material, and the feeder has a connection for guiding the soil improving material into the tunnel member. It is characterized in that it is configured to be provided by connecting cylinders.

Here, the mixing means can be constituted by, for example, a mixing vessel equipped with a paddle mixer. When this type of mixing means is used, an introduction portion for the mixed material is provided on the upper surface on one end side of the mixing container. Then, the mixed material transport conveyor is configured to transport the mixed material to an upper position of the introduction section, and to supply the mixed material to the mixing container by dropping the mixed material by its own weight from the end of the mixed material transport conveyor. In order to stably hold the earth and sand conveyed by the mixed material conveying conveyor, regulating plates for preventing the earth and sand from spilling from the left and right sides of the conveyor belt are arranged on both left and right sides of the conveyor belt. In this case, the tunnel member is composed of a side cover connected to both of the restriction plates and a ceiling cover provided so as to bridge between the upper portions of the both side covers. The connecting cylinder is configured to be connected to an opening formed in the ceiling cover of the tunnel member.

The tunnel member does not need to extend the entire length of the transport path of the mixed material to the mixing container. For example, a cover for covering a falling portion of the mixed material from the mixed material transport conveyor can be extended from the mixed material introduction portion provided in the mixing container. In this case, the end of the tunnel member is connected to the direction change portion cover. Thereby, the tunnel member becomes substantially linear along the mixed material conveying conveyor, so that even if this tunnel member is formed of a flexible member, sufficient shape retention can be provided. Therefore, by configuring this tunnel member with a flexible member, when the entire machine vibrates,
The vibration can be absorbed by the bending of the tunnel member.

Although the transport path of the mixed material is covered by the tunnel member, a gap may still be formed at the connection between the mixed material transport conveyor and the mixing means. Therefore, by connecting the negative pressure generating means to either the tunnel member or the direction change portion cover, it is possible to prevent the pulverized soil improvement material or the like from leaking from inside the tunnel member and the direction change portion cover. Further, the connecting cylinder for supplying the soil improvement material from the feeder to the inside of the tunnel member may be formed of a hard cylindrical member, but from the viewpoint of vibration and the like, it is preferably configured of a rubber cylinder formed in a substantially cylindrical shape. desirable.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. First, FIGS. 1 and 2 show the entire configuration of a self-propelled soil improvement machine, and FIG. 3 shows an exploded configuration of a soil improvement mechanism.

In the drawing, reference numeral 1 denotes a lower traveling body,
The lower traveling body 1 is provided with crawler-type means having, for example, left and right crawler tracks 1a. A main body frame 2 constituting a chassis is installed on the lower traveling body 1, and a mixed material supply unit 3 for supplying a mixed material composed of earth and sand and a soil improvement material to the main body frame 2 is agitated and mixed. Mixing means 4, an improved soil discharging section 5, and the like. In view of the processing flow, the arrangement position of the mixed material supply unit 3 is forward,
It is on the upstream side. The conveying direction of the mixed material in the mixed material supply unit 3 is obliquely upward. Further, since the improved soil generated by the mixing means 4 is discharged downward, the improved soil discharger 5 receives the improved soil at a lower position of the mixing means 4 and is transported obliquely upward. Further, a driving device 6 having a built-in driving machine such as an engine, a hydraulic pump, and a direction switching valve unit is installed at an upper position of the mixing means 4.

The mixed material supply section 3 has a mixed material transport conveyor 10, to which soil and sand are supplied from a soil hopper 20, and then to a soil improver hopper 30. The mixed material transport conveyor 10 has a transport belt 11, which is provided between a drive wheel 13 supported by a frame 12 and a driven wheel 14. An adjustment mechanism is provided. 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 right and left sides of the conveying surface of the conveying belt 11 at positions downstream of the mounting portion of the earth and sand hopper 20, and the restricting plates 16 are conveyed by the conveying belt 11. The height is determined, and the transport amount of the earth and sand is controlled by this. That is, the earth and sand conveyed while being accumulated on the conveyor belt 11 is held so as not to spill left and right.

A vibrating sieve 21 is provided above the sediment hopper 20. The vibrating sieve 21 is tilted, and independently of the sediment hopper 20, a vibrating support member 22 made of a spring or the like is used. It is supported by a support member 17 provided on the frame 2. Here, the vibrating sieve 21 is configured by providing a grid, a wire mesh, or the like on the upper surface of a frame-shaped member fitted to the earth and sand hopper 20. The vibrating sieve 21 is provided with a vibration means 23. Therefore, vibrating sieve 2
When the vibrating sieve 21 is vibrated in the vertical direction by the vibrating means 23 when the vibrating sieve 21 is thrown on the top 1, solid foreign matters such as concrete, rocks, and metals are separated from the injected sediment, and only the sediment enters the sediment hopper 20. It is captured. The solid foreign matter that is separated by the vibrating screen 21 and remains thereon moves downward along the inclination of the vibrating screen 21 and falls on the ground. As a result, solid foreign matter is removed from the injected earth and sand, and is taken into the earth and sand hopper 20 having a predetermined volume. In addition, the sieve provided in the earth and sand hopper 20 may be a fixed sieve, or may not be provided if solid foreign matter is removed in advance.

The soil improving material hopper 30 has a storage tank 31 for storing a predetermined amount of the soil improving material, and a feeder 32 for supplying the soil improving material from the storage tank 31 onto the transport belt 11 of the mixed material transporting conveyor 10. It has.
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. For example, when used as ground improvement or backfill soil, lime or cement, or a mixture of these with various additives for promoting solidification is used.

The storage tank 31 is a substantially cylindrical container, and in the illustrated case, a bellows portion 31a is provided on the upper side.
The height dimension is made variable by extending and contracting the bellows 31a. In addition, a lid 33 is provided on the upper portion of the storage tank 31 so that the soil improving material can be supplied. When the lid 33 is opened, the soil improving material is supplied from the flexible container. It has become. Then, when the lid 33 is closed after the soil improving material is supplied, the storage tank 31 is substantially closed. The configuration of the storage tank is not limited to the one having the bellows portion described above, but may be any as long as it has a lid and can be substantially sealed in a state in which a predetermined amount of soil improvement material is stored. .

On the other hand, the feeder 32 is for supplying the soil improving material in the storage tank 31 at a regulated supply amount. To this end, as shown in FIG.
Is connected to the lower surface of the storage tank 31, and the upper side of the casing 34 of the feeder 32 is connected to a soil improvement material supply port 35 formed in the lower surface 31 b of the storage tank 31. An inflow portion 34a through which the soil improvement material flows in from the supply port 35, and an outflow portion 34b which opens at an upper portion of the conveyor belt 11 in the mixed material conveyor 10 at the lower portion. A substantially arc-shaped supply amount control unit 34c is provided between the inflow unit 34a and the outflow unit 34b. The supply amount control unit 34c includes a rotor 3 driven by a motor (not shown).
6 is mounted, and by the rotation of the rotor 36,
The soil improvement material taken in from the inflow portion 34a is
b and the rotor 36
The supply amount of the soil improving material can be changed according to the number of rotations. In the figure, 37 is the storage tank 3
1 is a stirring rod for stirring the inside.

The end of the mixed material transport conveyor 10 is connected to a mixing container 40 constituting the mixing means 4. The mixing container 40 is a rectangular container arranged in the longitudinal direction of the main body frame 2, that is, in a substantially horizontal direction. As shown in FIGS. 5 and 6, an introduction portion is provided at an upper portion on the front side of the mixing container 40. An inlet 41 is provided, and a lower outlet on the rear side is connected to an outlet 42 forming a discharge portion. The other portions are substantially sealed. In the mixing container 40, two paddle mixers 43 are provided in parallel as a means for stirring and mixing the earth and sand and the soil improvement material. The paddle mixer 43 has a rotating shaft 44
A large number of paddles 45 are implanted on the rotating shaft 44 at a predetermined angle (for example, every 90 °).
Is rotationally driven to stir the inside of the mixing container 40, and the earth and sand and the soil improving material guided into the mixing container 40 are transferred toward the discharge port 42 while being stirred and uniformly mixed. The number of paddle mixers provided in the mixing container 40 is appropriately set according to the relationship between the width and height of the mixing container 40. However, it is desirable to provide an even number of paddle mixers.

In the mixing vessel 40 having the above structure, the earth and sand introduced from the inlet 41 and the soil improving material are uniformly stirred and mixed by the action of the paddle mixer 43.
Improved soil is produced while being transported toward the outlet 42. The improved soil thus produced is discharged from the discharge port 42 to the improved soil discharge section 5 by the action of its own weight. Here, the improved soil discharging unit 5 includes a carry-out conveyor 50 that conveys the improved soil generated by the mixing means 4. This unloading conveyor 50
Extends obliquely upward from the lower part of the mixing vessel 40, and the improved soil is deposited at a predetermined position at a predetermined position.

Next, FIG. 7 shows an example of 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 excavator PS, and put into a soil hopper 20 of a soil improvement machine. While the earth and sand is conveyed from the earth and sand hopper 20 by the mixed material conveying conveyor 10, the earth and soil improving material is supplied from the earth and soil improving material hopper 30 and supplied onto the surface of the earth and sand. Then, a mixture of the earth and sand and the soil improving material is fed into the mixing vessel 40 from the end of the mixed material transporting conveyer 10 through the inlet 41, and the soil and the soil improving material are actuated by the paddle mixer 43 provided in the mixing vessel 40. While the mixture is stirred and mixed
Move to the position. Then, by mixing the earth and sand and the soil improving material uniformly in the mixing container 40, an improved soil in which the soil quality is improved or modified is produced. This improved soil is deposited at a predetermined position from a discharge port 42 via a discharge conveyor 50.

As described above, the produced improved soil is conveyed to the carry-out conveyor 50 constituting the improved soil discharging means and is deposited at a predetermined position. At the transfer end position of the carry-out conveyor 50, the improved soil sorting device 60 is provided. Is provided. This sorting device 6
Reference numeral 0 denotes a portable type, which includes a sieve 61 and a transfer conveyor 62. The sieve 61 has a mesh size that allows passage of a predetermined particle size or less, 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 61, the improved soil having a uniform particle size is transferred to the transfer conveyor 6.
In step 2, it is deposited at a predetermined deposition location. In addition, since the improved soil having a large particle size that has not passed through the sieve 61 is of the same quality in that the solidification treatment has been performed, the improved soil having a large particle size is also subjected to a treatment for equalizing or uniforming the particle size. After that, it is used as a mixed material for backfilling.

[0025] Incidentally, the soil improvement treatment deals with granules or powders of earth and sand and soil improvement material, and since the treatment is performed in the field, there is a possibility that these soil and soil improvement material may scatter outside. There is. Therefore, in order to prevent contamination of the surrounding environment, it is necessary to prevent or suppress scattering to the outside.

The earth and sand is put on the vibrating sieve 21, vibrated by the vibrating sieve 21, and flows into the earth and sand hopper 20. Then, the conveyed material is conveyed by the mixed material conveying conveyer 10 and supplied into the mixing container 40. While the earth and sand are conveyed along the mixed material conveying conveyer 10, the feeder 32 is fed from the storage tank 31 in the soil improvement material hopper 30.
The soil improvement material is added via the. The mixed material composed of the earth and sand and the soil improving material supplied from the mixed material conveying conveyor 10 into the mixing container 40 is mixed with the improved soil while being transferred while being stirred and mixed by the paddle mixer 43 provided in the mixing container 40. Become. The improved soil is transferred from the mixing container 40 to the discharge conveyor 50, and is deposited at a predetermined position via the sorting device 60.

Here, the earth and sand hopper 20 is a frame-shaped member, and the mixing container 40 is substantially sealed except for an inlet 41 and an outlet 42. Further, the improved soil has a very small possibility of scattering since the soil improving material is attached to the soil surface or incorporated into the soil. From the above, there is the highest possibility that the earth and sand on the vibrating sieve 21 and the soil improving material supplied from the feeder 32 to the mixed material conveying conveyor 10 are scattered as particles or powder. Vibration is applied to the earth and sand on the vibrating sieve 21. If the earth and sand has a small particle size and a small water content, the earth and sand may be scattered around when vibrated. In order to prevent the scattering of the fine-grained soil, the scattering can be prevented or suppressed by, for example, mixing with a soil having a high water content or spraying water.

When the soil improving material is supplied from the feeder 32 to the sand conveyed to the conveyor belt 11 of the mixed material conveying conveyor 10, the fine powder soil improving material is scattered. Further, since the soil improvement material is added onto the earth and sand on the conveyor belt 11, the soil improvement material is exposed on the mixed material conveyor 10. Furthermore, the mixing container 4
The transition of the mixed material to zero is guided to the introduction portion 41 of the mixing container 40 as falling by its own weight. Therefore, in the transport path of the mixed material from the earth and sand hopper 20 to the introduction portion 41 of the mixing container 40, the soil improving material may be scattered to the outside in the form of fine powder. As the soil improvement material, various materials are used. For example, as a material for solidifying earth and sand, a solidification material such as lime or cement is used. When such solidified material is scattered in the form of fine powder, the surrounding environment is greatly contaminated.In addition, if the wind is strong, not only the amount of scattered material is increased, but also scattered far away. Is contaminated. Therefore, in the present invention, environmental pollution is prevented by taking measures to prevent scattering of the soil improvement material, so that even in the vicinity of a residential area, etc., the soil improvement processing can be performed without disturbing the surroundings. .

Then, as shown in FIGS. 8 and 4,
A tunnel member 100 is provided between the earth and sand hopper 20 and the introduction portion 41 of the mixing container 40, and the transport path of the mixed material from the mixed material transport conveyer 10 to the mixing container 40 is substantially complete by the tunnel member 100. It is configured to be sealed. Here, the tunnel member 10
Reference numeral 0 denotes left and right side covers 101, 101 and a ceiling cover 102 provided so as to bridge between the two side covers 101, 101. This tunnel member 10
0 indicates that the side cover 101 is a conveyer for mixed material 1
0 is connected to the regulating plate 16 by means such as screwing. A flange 100a is formed at one end of the tunnel member 100. The flange 100a is in contact with the end wall 20a of the earth and sand hopper 20, and the other end of the tunnel member 100 is Is turned downward at the reversal part, and a flange portion 100b is formed at the end thereof.
Is in contact with the periphery of the inlet 41 of the mixing container 40 projecting in a cylindrical shape. Here, the flange portions 100a, 100
b can be fixed to the earth and sand hopper 20 and the inlet 41 by screws or the like, respectively.
By increasing the connection strength between the side cover 101 and the regulating plate 16, the flange portions 100a and 100b can be held in an unfixed state.

Further, as apparent from FIG. 4, the feeder 3 is provided on the ceiling cover 102 of the tunnel member 100.
2, an introduction opening 102a is formed. A connecting cylinder 103 is fixed to an end face of the outflow portion 34b in the casing 34 of the feeder 32 by means such as a screw. The connecting cylinder 103 is connected to the tunnel member 10 through an introduction opening 102a. Guided inside. In addition, the connecting cylinder 103 is connected to the transport belt 1.
1, the connecting cylinder 103 is opened at a position higher than the earth and sand conveyance height position.
1 is kept out of contact with the earth and sand.

With the above configuration, the tunnel member 100 has a function of sealing the conveying path of the mixed material from the position of the end wall 20 a of the earth and sand hopper 20 to the inlet 41 of the mixing container 40. Thus, the soil improving material is supplied from the feeder 32 to the closed space of the tunnel member 100 via the connecting cylinder 103. Therefore, there is no possibility that the soil improvement material is scattered to the outside, and the pollution of the surrounding environment can be suppressed. Further, since the inlet 41 of the mixing container 40 is also open to the closed space, even if the earth and sand or the soil improving material is flipped up by the operation of the paddle mixer 43 provided in the mixing container 40, it overflows to the outside. No more.

During the soil improvement process, the whole machine vibrates, and the direction, magnitude, frequency, etc. of the vibration vary in each part. The tunnel member 100 is connected to the earth and sand hopper 20, the mixed material transporting conveyor 10, and the mixing container 40.
03 is connected between the soil improving material hopper 30 and the tunnel member 100. Therefore, the tunnel member 100 and the connection cylinder 103 can be formed of a hard member such as a metal or a hard plastic, but may be deformed or damaged by vibration of each part. In order to prevent this, it is desirable that at least the connection cylinder 103 be made of an elastic member such as rubber. Further, when the entire cover member 100 is also formed of an elastic member such as rubber, deformation and damage can be reliably prevented. However, when the entire tunnel member 100 is formed of an elastic member, the direction of the tunnel member 100 is changed from obliquely upward to downward at the transition from the end of the mixed material transport conveyor 10 to the introduction portion 41 of the mixing container 40. Therefore, this portion may not have sufficient shape retention. In such a case, the connection cylinder 103 may be formed of an elastic member such as rubber, and the tunnel member 100 may be formed of a hard member.

As described above, as shown in FIG. 9, the introduction portion 41 of the mixing container 40 is provided with the direction changing portion cover 200 in which a hard member made of metal or the like is formed in an arc shape.
The tunnel member 201 may be connected to the direction changing portion cover 200 so as to protrude from the leading portion 41. Here, the tunnel member 20
1 is a left and right side cover 202 connected to the regulating plate 16.
And a ceiling cover 203 provided so as to bridge between the two side covers 202. The side covers 202 and the ceiling cover 203 are substantially linear. Therefore, even if they are formed of an elastic member such as rubber, the shape retention can be improved by mounting them with a certain degree of tension. Therefore,
Even if vibrations having different degrees and directions occur between the earth and sand hopper 20 and the mixed material transport conveyor 10 and the mixing container 40, the vibration can be effectively absorbed by the elastic member, and the tunnel member 2
01 is prevented, and noise is reduced. The connection cylinder 204 connected to the feeder 32 passes through the introduction opening 203a formed in the ceiling cover 203 of the tunnel member 201, and is guided to the upper portion of the mixed material transport conveyor 10. Similarly, the body 204 is desirably formed of an elastic member such as rubber.

However, no matter which type of tunnel member is used, it is impossible to completely cover the wound portion of the conveyor belt 11 around the drive wheel 13 in the mixed material conveyor 10. Therefore, even if the tunnel member is provided, there is a possibility that the fine powdery soil improvement material leaks out of the tunnel member. Therefore, as shown in FIG. 9, the direction change portion cover 200 (when the tunnel member 100 shown in FIG. 8 is used, the tunnel member 100) is connected to a negative pressure source (not shown). A negative pressure suction hose 205 is connected and provided.
To apply a suction force to the mixed material transporting path by the mixed material transporting conveyor 10. As a result, the fine powdery soil improving material floating inside the direction changing portion cover 200 and the tunnel member 201 is recovered by the suction force of the negative pressure suction hose 205.

[0035]

As described above, the present invention has an effect that, for example, it is possible to reliably prevent the fine powdery soil-improving material from being scattered around during the soil-improving process.

[Brief description of the drawings]

FIG. 1 is a front view of a soil improvement machine according to an embodiment of the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is an exploded view of a soil improvement mechanism in the soil improvement machine of FIG.

FIG. 4 is a cross-sectional view of a supply section of a soil improvement material from a feeder of a soil improvement material hopper to a mixed material transport conveyor, showing one embodiment of the present invention.

FIG. 5 is a plan view of a mixing unit showing one embodiment of the present invention.

6 is a sectional view taken along line AA of FIG.

FIG. 7 is an operation explanatory view showing a state in which soil improvement processing is performed using the soil improvement machine according to the embodiment of the present invention.

FIG. 8 is a front view showing components of a mixed material transport path provided with a tunnel member according to the embodiment of the present invention.

FIG. 9 is a front view showing components of a mixed material transport path provided with a tunnel member according to another embodiment of the present invention.

[Explanation of symbols]

REFERENCE SIGNS LIST 1 Lower traveling body 2 Main body frame 3 Mixed material supply section 4 Mixing means 5 Improved soil discharge section 10 Mixed material transport conveyor 11 Transport belt 16 Control plate 20 Earth and sand hopper 30 Soil quality improvement material hopper 31 Storage tank 32 Feeder 40 Mixing container 41 Inlet 42 Outlet 100, 201 Tunnel member 101, 202 Side cover 102, 203
Ceiling covers 103, 204 Connecting cylinder 200 Turning cover 205 Negative pressure suction hose

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yasuharu Yamamoto 2-6-2 Otemachi, Chiyoda-ku, Tokyo Inside Nikko Construction Machinery Co., Ltd. (72) Inventor Yoshihiro Hoshino 650, Kandatecho, Tsuchiura-shi, Ibaraki Hitachi Inside the Tsuchiura Plant of the Machinery Company (72) Inventor Hisayuki Hashimoto 650, Kandamachi, Tsuchiura-shi, Ibaraki Prefecture Inside the Tsuchiura Plant of Hitachi Construction Machinery Co., Ltd. (72) Tetsushiro Miura 2-6 Otemachi, Chiyoda-ku, Tokyo No. 2 F-term in Ritsuku Construction Machinery Co., Ltd. (reference) 2D040 AB07 CD07 EA02 EB04 4G037 AA03 DA30 EA03 4G078 AA13 AB20 BA01 DA01 EA10

Claims (6)

[Claims] A soil hopper, a storage tank in a substantially sealed state, and a feeder connected to the storage tank provided in a soil improvement machine having mixing means for uniformly mixing the soil and the soil improvement material. Soil improving machine having a soil improving material hopper provided with: and a mixed material transporting conveyor that constitutes a mixed material transporting path configured to transport the mixed material by adding the soil improving material from the feeder to the earth and sand supplied from the earth and sand hopper. In the mixed material supply device, a portion of the mixed material conveying path from an outlet of the earth and sand hopper to the mixing means is covered with a tunnel member for preventing scattering of soil improvement material. A mixed material supply device for a soil improvement machine, characterized in that a connecting cylinder for guiding the soil improvement material is connected and provided in the tunnel member. 2. The mixing means has a mixing container equipped with a paddle mixer, and a mixing material introduction section is provided on an upper surface on one end side of the mixing container, and the mixing material transport conveyor transfers the mixing material into the introduction section. Is transported to the upper position, and is supplied to the mixing container by dropping under its own weight from the end of the mixed material transport conveyor, and the transported earth and sand is transported to the left and right sides of the transport belt constituting the mixed material transport conveyor. Without placing a regulating plate for holding,
The tunnel member is composed of a side cover connected to the two regulating plates, and a ceiling cover provided so as to bridge between upper portions of the both side covers, and the connection cylinder is a ceiling cover of the tunnel member. The mixed material supply device for a soil improvement machine according to claim 1, wherein the mixed material supply device is configured to be connected to an opening formed in the soil improvement machine. 3. An arc-shaped direction changing portion cover is provided at an introduction portion of the mixed material in the mixing container so as to cover a falling portion of the mixed material from the mixed material transporting conveyor, and the tunnel member is provided. 3. A mixed material supply device for a soil improvement machine according to claim 2, wherein said device is connected to said direction changing portion cover. 4. The apparatus according to claim 3, wherein the tunnel member is formed of a flexible member. 5. The mixed material supply device for a soil improvement machine according to claim 1, wherein a negative pressure generating means is connected to the tunnel member or the direction change portion cover. 6. The mixed material supply device for a soil improvement machine according to claim 1, wherein the connecting cylinder is formed of a rubber cylinder formed in a substantially cylindrical shape.