JP2001279663A - Self-advancing soil improving machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To highly accurately maintain the mixing ratio of earth and sand to a soil improving material by surely supplying a fixed quantity of earth and sand to a mixer even when using various earth and sand as an improving object. SOLUTION: This self-advancing soil improving machine for carrying out the mixture by a carrying-out conveyor 9 by mixing earth and sand P with the soil improving material by introducing the earth and sand P inputted to an earth and sand hopper 2 to the mixer 3 via a vibrating feeder 4 and a carrying-in conveyor 5, is provided with the vibrating feeder 4 having an earth and sand placing plate 27 for placing the earth and sand P inputted to the earth and sand hopper 2, an exciting driving device 28 for generating rotary driving force, a vibrating shaft 31 for converting the rotary driving force into vibration of the earth and sand placing plate 27, a pulley 32, a belt 33 and rotary drums 34 and 34.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a self-propelled soil improving machine for improving soil by mixing earth and sand put in a sand hopper with a soil improving material, and more particularly, to a case where various kinds of earth and sand are to be improved. Even so, the present invention relates to a self-propelled soil conditioner capable of surely supplying a fixed amount of earth and sand to a mixing device and maintaining a mixing ratio of earth and sand and a soil conditioner with high accuracy.

[0002]

2. Description of the Related Art For example, in burial work for gas pipes, water and sewage works, and other road works and foundation works,
It is desirable to backfill the excavated soil. However, when the generated soil is not suitable for backfilling (for example, when it contains a large amount of foreign matter such as rocks, brick pieces, concrete pieces, metals, or clayey soil with extremely small particle size and high viscosity) If the soil itself is too soft and the soil itself, which is difficult and difficult, is soft and backfilling may cause land subsidence, etc.), use a soil improvement material mainly composed of lime, cement, etc. in the generated soil. The excavation site is buried after being mixed and solidified and improved into high quality reusable soil.

[0003] In such a machine for improving soil quality,
Based on the background of difficulty in securing land for a soil improvement plant or decentralization of land, for example, Japanese Patent Application Laid-Open No. 9-195265.
As described in Japanese Patent Application Laid-Open Publication No. H10-260, a self-propelled soil improvement machine has been proposed in which the soil improvement machine is made capable of running on its own and has mobility. This self-propelled soil improvement machine is, for example, a hydraulic shovel or the like that introduces the earth and sand put into the earth and sand hopper to a mixing device via a conveyor for mixing, mixes the soil with the soil improvement material, and carries out the mixture by a discharge conveyor. It has become.

At this time, a supply opening (gate) of a predetermined size is provided on a side wall of the earth and sand hopper on the side of the conveyor for conveyance in order to minimize a variation in a mixing ratio of the earth and sand with the soil improvement material. Of the input sand that is provided and is conveyed in a substantially horizontal direction on the conveyor belt, only the sand that has passed through the supply opening (= the height of the opening, that is, only a constant volume) is outside the sand hopper. To the mixing device. In this way, a constant amount of soil improving material is always supplied from the soil improving material supply device while the fixed amount of soil and sand is supplied to the mixing device.

[0005]

In recent years, under the background of the promotion of waste recycling such as the enforcement of the Recycling Resources Promotion Law (so-called Recycling Law) (October 1991), the need for soil improvement of excavated soil has increased. The nature and condition of sediment targeted for soil improvement are becoming extremely diverse. Therefore, as the soil to be improved, for example, a sandy soil having a high sand content and a low degree of tackiness, or a clay with a very small particle size and a high tackiness, such as those having greatly different soil properties themselves are included. Has become. Further, there may be a mixture of different materials having different water contents, and a mixture of sand-like materials and those obtained by compressing the soil into a mass.

[0006] On the other hand, under the background of the promotion of waste recycling as described above, the need for quality improvement of improved soil, which is a soil improvement product, is also increasing, and various properties and properties as described above are required.
There is a constant demand for high quality improved soil from the soil generated. For that purpose, it is necessary to control the mixing ratio of the soil and the soil improvement material with high precision to eliminate the fluctuation.
Here, in the above-described conventional technology, the variation in the mixing ratio is reduced by keeping the amount of the earth and sand and the supply amount of the soil improvement material substantially constant as described above, and the amount of the earth and sand is reduced by the supply opening (gate). ) Makes the height (volume) constant.

However, even with the same volume of earth and sand, the amount of sediment deposited in the earth and sand hopper, the moisture content of the earth and sand,
And the density (viscosity) of the earth and sand may change due to the soil properties and other factors, and the weight (self-weight) may change. Therefore, in the method of placing and transporting the earth and sand on the belt of the conveyor belt conveyor,
There is a possibility that a certain amount of earth and sand cannot always be supplied to the mixing device. In particular, in the case of highly viscous earth and sand, the force of the viscosity exceeds the frictional force from the belt due to the own weight of the earth and sand, and the belt of the conveyor belt conveyor slips, which may make the conveyance itself difficult. Therefore, there is a possibility that the mixing ratio between the soil and the soil improvement material may vary, and it is difficult to stably produce high quality improved soil.

In a large-sized soil improvement plant provided with a stationary soil improvement device, a measuring means for controlling a mixing ratio between the soil and the soil improvement material in order to improve the quality of the improved soil. Although it is possible to provide such a measuring means, it is difficult to separately provide such a weighing means in a self-propelled soil improvement machine because of a limitation in a mounting space.

[0009] An object of the present invention is to reliably supply a fixed amount of sediment to a mixing device even when a wide variety of earth and sand is to be improved, and to accurately determine the mixing ratio between the soil and the soil improving material. It is to provide a self-propelled soil improvement machine that can be maintained.

[0010]

Means for Solving the Problems (1) In order to achieve the above object, according to the present invention, earth and sand introduced into an earth and sand hopper are introduced into a mixing device through a conveying means and mixed with a soil improvement material.
In a self-propelled soil improvement machine that unloads the mixture on a conveyor, the transporting means includes a plate member on which the earth and sand put in the earth and sand hopper is placed, and the plate member is vibrated to remove the earth and sand on the plate member. A vibrating feeder provided with vibrating means for moving in the transport direction.

In the present invention, the conveying means includes a vibrating feeder, and the earth and sand put in the earth and sand hopper is placed on the plate member, and the plate member is vibrated by the vibrating means, and The earth and sand are transported by sequentially moving them in the transport direction. By performing the conveyance using the vibration in this manner, if the vibration operation by the vibration means is controlled to be constant, the conveyance capacity is such that the conveyance conveyor is used even if the density or viscosity of the earth and sand changes. It is not affected as in the conventional structure.

For example, when the vibrating means is constituted by a driving means for generating a rotational driving force and a converting means for converting the rotational driving force into vibration of the plate member, the vibration means is controlled by the rotation speed of the driving means. The frequency of the vibration of the plate member is determined, and the amplitude of the vibration of the plate member is determined by the conversion structure of the conversion means. Since the earth and sand transport amount is uniquely determined by the frequency and amplitude of the vibration, the earth and sand transport amount can be easily made constant by making them constant. As a result, it is possible to reliably supply a fixed amount of the earth and sand to the mixing device, and it is possible to maintain the mixing ratio of the earth and sand and the soil improving material in the mixing device with high accuracy.

(2) In the above (1), preferably,
A driving unit for generating a rotational driving force,
Converting means for converting the rotational driving force into vibration of the plate member.

(3) In the above (1) or (2), preferably, the plate member is arranged to be inclined so as to have a downward gradient toward the transport direction.

The movement of the earth and sand in the transport direction on the plate member can be made smoother, and the fixed amount can be more reliably supplied.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the self-propelled soil improvement machine of the present invention will be described below with reference to the drawings.

FIG. 1 is a side view showing the entire structure of the self-propelled soil conditioner of the present embodiment, and FIG. 2 is a top view thereof.

In FIG. 1 and FIG. 2, the self-propelled soil improvement machine receives the earth and sand to be improved by a working tool such as a bucket of a hydraulic shovel, and sorts the injected earth and sand into a predetermined particle size. Details will be described later) Sieve unit 1,
A sediment hopper 2 for receiving the sediment selected by the sieve unit 1, a mixing device (processing tank) 3 for mixing the sediment introduced from the sediment hopper 2 with a predetermined soil improvement material and discharging the same downward, and a sediment hopper 2. A soil improvement machine body 7 equipped with a vibration feeder 4 and a carry-in conveyor 5 for transporting and receiving the received earth and sand to the mixing device 3 and a soil improvement material supply device 6 for supplying the soil improvement material; A traveling body 8 provided below the soil improvement machine main body 7;
2. The rear side of the self-propelled soil conditioner receiving the mixture mixed and discharged downward (the other side in the longitudinal direction of the truck frame soil conditioner mounting portion 10A described later, the right side in FIG. 2).
And a carry-out conveyor 9 for carrying and carrying out.

The traveling body 8 includes a track frame 10
And left and right crawler tracks 11 as running means. The track frame 10 is formed of, for example, a substantially rectangular frame, and holds the sieve unit 1, the earth and sand hopper 2, the mixing device 3, the soil improvement material supply device 6, a power unit (machine room) 93 described later, and the like. And a leg 10B connecting the soil improvement machine mounting portion 10A and the left / right crawler track 11 described above. The endless track crawler belt 11 is stretched between a drive wheel 12 and a driven wheel (idler) 13 rotatably supported by the legs 10B, and is provided on the drive wheel 12 for left and right running. The self-propelled soil improvement machine is made to run by the application of driving force by the hydraulic motor 14.

The sieve unit 1 is provided with the earth and sand hopper 2
At the same time, the truck frame soil improvement machine mounting portion 10
A is mounted above one end in the longitudinal direction (the left-right direction in FIG. 1) (the front side of the self-propelled soil improvement machine, that is, the left side in FIG. 1).

The sieve unit 1 is a so-called vibrating sieve capable of vibrating in the vertical direction. A spring 17 is mounted on a support member 16 provided on a support post 15 erected on the truck frame soil improvement machine mounting portion 10A. A support frame 18 elastically supported through the support frame, a grid member 19 (see FIG. 2) mounted on the support frame 18, and a vibration axis (not shown) of the grid member 19 are inserted therein. The rotating drum 20 includes a vibration hydraulic motor 21 for generating a driving force for rotating the rotating drum 20, and a guard 22 provided on the lattice member 19. Then, the driving force of the vibration hydraulic motor 21 is transmitted to the rotating drum 20 via the belt 23, and is rotated in a counterclockwise direction in FIG.
The vibration axis of the lattice member 19 inserted into the inside of the rotating member 0 rotates. At this time, the weight distribution of the rotary drum 20 is eccentric so that its center of gravity is separated from the vibration axis by a predetermined distance (or the rotary drum 20 itself is mounted eccentric to the vibration axis). Vibration due to the eccentric structure is applied to the vibration axis, whereby the lattice member 19 and the support frame 18 vibrate while maintaining substantially horizontal.

Thus, of the components of various sizes contained in the earth and sand charged into the sieve unit 1, the grid member 19
Of the grid member 19 is moved to the front side (left side in FIG. 1) of the self-propelled soil improvement machine on the grid member 19, and is discharged by flowing down. It is adapted to be introduced into the lower earth and sand hopper 2. This eliminates solid foreign substances such as rocks, concrete, and metal blocks contained in the earth and sand, and also has a function of reducing the bulk density of the earth and sand so that sufficient air is contained inside the earth and sand.

The guard 22 attached to the upper part of the sieve unit 1 covers three surfaces on the rear end side (right side in FIG. 1) and right and left end sides (upper and lower sides in FIG. 2) in the upper part of the sieve unit 1. And prevents the injected earth and sand from flowing down from the three surfaces.

The sediment sorted by the sieve unit 1 is put into a sediment hopper 2 located immediately below the sieve unit 1, and is driven by a vibrating feeder 4 and a carry-in conveyor 5 provided as a conveying means provided in a soil improvement machine body 7. , To the mixing device 3.

FIG. 3 is a side view showing a detailed structure of an example of the earth and sand hopper 2 and the vibration feeder 4, and FIG. 4 is a perspective view showing a detailed structure of an example of the earth and sand hopper 2 and the vibration feeder 4. FIG. 5 is a cross-sectional view taken along the line VV in FIG. 3 (however, earth and sand P are also shown for clarification of the operation described later). 3 to 5, the earth and sand hopper 2 is fixed to the support member 16 and has a diameter that increases upward for convenience when the earth and sand is smoothly fed from the sieve unit 1. The bottom has a box shape (in other words, a substantially rectangular tube shape or a frame shape), and the upper and lower sides are open.

The vibration feeder 4 is a unit configured to be capable of vibrating (oscillating) as shown by an arrow C (see FIG. 13 to be described later) while maintaining a substantially horizontal position. Left and right
A support post 24 erected on the left and right beam portions 10Ab (see FIG. 5) passed between the right two front and rear beam portions 10Aa.
And a support frame 26 elastically supported via a spring 25
And a plate-like earth and sand mounting plate 27 horizontally mounted on the support frame 26, and a vibration driving device 28. The vibration drive device 28 has a hydraulic motor 29,
A pulley 30 is connected to an output shaft 29a of the hydraulic motor 29. A vibration shaft 31 is rotatably mounted on the support frame 26 on which the sediment mounting plate 27 is mounted, at a position below the lower limit position of the sediment mounting plate 27 (see FIG. 3). ). Both ends of the vibrating shaft 31 protrude from both side surfaces of the support frame 26, and a pulley 32 is mounted on one end thereof, and a driving force is applied between the pulley 32 and the pulley 30 of the vibration driving device 28. A transmission belt 33 is provided by winding.

The rotating drums 34, 3 are provided at both ends of the vibration shaft 31.
4 are attached. The position of the center of gravity of the rotating drum 34 is located at a predetermined distance from the vibration shaft 31 (or the rotating drum 34 itself may be eccentrically mounted on the rotating shaft). Rotation in the direction), the center of gravity is displaced,
The whole earth and sand mounting plate 27 vibrates (oscillates) as shown by an arrow C (see FIG. 13).

The injected sediment P (see FIG. 5) is sequentially conveyed on the sediment loading plate 27 from the left side to the right side in FIG. 3, and the downstream end (right side in FIG. 3) in the feeding direction of the sediment conveying plate 27. It is mounted on a belt 40 (details will be described later) of the carry-in conveyor 5 located below the portion 27a (see FIG. 4).

At this time, of the four side walls 2a to 2d constituting the frame of the earth and sand hopper 2, the three side walls 2a to 2c except for the side wall 2d on the rear side of the soil improvement machine are mounted on the vibratory feeder 4. It faces the surface of the mounting plate 27 with a very small gap (see FIG. 5), and the gap is covered with rubber 35 to prevent the earth and sand P from leaking. In the side wall 2 d of the earth and sand hopper 2, an earth and sand supply opening (outflow port) 36 whose width dimension is slightly smaller than the width of the conveyor belt 40 of the carry-in conveyor 5 is formed. The soil P having a height corresponding to the height of the opening 36 is cut out and flows down onto the carry-in conveyor 5 (see also FIG. 13 described later).

As shown in FIG. 1, the carry-in conveyor 5 extends below the rear end (right end in FIG. 1) of the vibrating feeder 4 and below the soil improving material supply device. The carry-in conveyor 5 has a lower upstream side (left side in FIG. 1) and a higher downstream side (right side in FIG. 1). In detail, one side from the longitudinal side of the truck frame soil improvement machine mounting portion 10A to the other side. Towards the side (to the rear of the self-propelled soil improvement machine)
It is provided so as to be inclined at a predetermined angle. Then, the carry-in conveyor 5 includes a frame 37
And a conveyor belt 40 wound and provided between a drive wheel 38 supported by the frame 37 and driven by a carry-in conveyor hydraulic motor (not shown) and a driven wheel (idler) 39.
A guide roller 41 for supporting the transport surface of the transport belt 40; and regulating plates 42 provided on both left and right sides in the width direction at the downstream end of the transport surface of the transport belt 40.
And

The transport belt 40 has a well-known adjusting mechanism on the driven wheel 39 side, and the guide roller 41
Are arranged at predetermined pitch intervals below the conveying surface of the conveying belt 40.

FIG. 6 is a side sectional view showing the entire structure of the soil improving material supply device 6, and FIG.
FIG. 8 is a horizontal cross-sectional view of FIG.
It is sectional drawing by II cross section.

6 to 8, the soil conditioner supply device 6 is located on the rear side (right side in FIG. 1) of the self-propelled soil conditioner with respect to the sieve unit 1 and is shown in FIG. As described above, the truck frame soil improvement machine mounting portion 10
A is mounted on almost the middle part in the longitudinal direction of A. In detail, it is supported by a frame-shaped base plate 44 provided on four (or three) columns 43 erected on the truck frame soil improvement machine mounting portion 10A. At this time, the downstream end of the carry-in conveyor 5 extends to between the columns 43, 43, and in such a positional relationship, is directly above the downstream end of the carry-in conveyor 5. The soil P supplied from the soil hopper 2 by the soil improvement material supply device 6
On the carry-in conveyor 5, a predetermined amount of soil improvement material is added.

The soil improving material supply device 6 includes a storage tank 45 for storing a predetermined amount of the soil improving material, and a storage tank 45 for storing the predetermined amount of the soil improving material.
And a feeder 46 for supplying a soil improving material by a predetermined amount.

The storage tank 45 has a substantially cylindrical shape as a whole and has a space for storing the soil improving material therein, and has a variable height (details will be described later). That is, the storage tank 45 has a lower side installed on the base plate 44 and a lower tank portion 47 having a bottomed cylindrical shape,
A top plate 48 and a bellows 49 as an upper tank having a variable upper volume provided between the lower tank 47 and the top 48 are provided.

The top plate portion 48 is formed of a plate whose outer peripheral side is bent downward, and has a substantially circular opening 50 at the center thereof.
The opening 50 is provided with an openable and closable lid 51 above the opening 50. A cutter 52 is attached to the top plate 48 below the position where the opening / closing lid 51 is provided. The cutter 52 is attached to a support arm 53 connected to the lower surface of the opening / closing lid 51.

When filling the storage tank 45 with the soil improving material, a crane 54 (see FIG. 2) provided on one side of the truck frame soil improving machine mounting portion 10A is used. Although not shown in detail, the crane 54 includes an arm that has a base end pivotally connected to the truck frame soil improvement machine mounting portion 10A and that expands and contracts in a telescopic manner, and a cylinder that moves the arm up and down. The hook connected to the wire can be moved up and down by winding up and down the wire at the tip of the arm.

That is, the opening / closing lid 51 provided on the top plate 48
Is opened, the flexible container is hung by the crane 54 and inserted into the storage tank 45 from the open / close lid 51, the flexible container is pressed against the cutter 52 by its own weight, the lower end thereof is cut off, and the soil inside the flexible container is cut off. The improving material is supplied into the storage tank 45. At this time, in order to ensure that the soil improvement material flows into the storage tank 45 from the flexible container cut by the cutter 52 and does not overflow or scatter around, the support arm to which the cutter 52 is attached is attached. 53
Is provided at a position where it enters from the top plate 48 by a predetermined depth.

The soil improving material is mixed with the sand P to improve or modify the soil, and a material suitable for the purpose of the soil improving and reforming is appropriately used.
Normally, when performing soil improvement to strengthen the ground or burying pipes, if excavated soil is used as backfill soil to backfill the area around the pipe laying part, solidified goods such as lime and cement, Particularly, lime is suitably used, and various additives and the like for promoting solidification are mixed with the lime as needed.

On the other hand, the lower tank portion 47 is composed of a bottom plate 55 and a peripheral body portion 56, as shown in FIGS. At this time, a soil improvement material supply opening 57 having a predetermined opening diameter is provided in the lower tank bottom plate 55, and the soil improvement material is supplied to the feeder 46 from this opening 57. In order to realize a smooth and reliable supply to the feeder 46, a stirring means 58 in the hopper is provided at a lower portion in the lower tank portion 47.

The stirring means 58 in the hopper is provided with a rotating shaft 59 extending through the center of the bottom plate 55 of the lower tank 47.
And a plurality of (four in this embodiment) main stirring blades 60 attached to the lower tank 4.
7 is disposed at a position close to the bottom plate 55. On the other hand, the bottom plate 5 is located at a position outside the lower tank 47 of the rotating shaft 59.
5 is connected to a stirring hydraulic motor 61 fixedly provided on the back surface side. Here, the stirring hydraulic motor 61 may be constituted by an electric motor or the like.

The radially outer end of the main stirring blade 60 extends to the vicinity of the inner surface of the peripheral body 56 of the lower tank 47 so as to connect the front ends of the main stirring blades 60 in the circumferential direction. , A ring-shaped holding member 62 is fixedly provided. In the holding member 62, one or a plurality of auxiliary stirring blades 63 are respectively mounted between connecting portions to the main stirring blades 60 located at the front and rear. Each of these auxiliary stirring blades 63 protrudes from the radially inner surface of the holding member 62 along the bottom plate 55 of the lower tank portion 47 toward the rotation shaft 59 by a predetermined length.

The opening 57 for supplying the soil improvement material is provided in the bottom plate 5.
5, the rotation path of the auxiliary stirring blade 63 includes the upper part of the position where the soil improvement supply opening 57 is opened. (See FIG. 7). The rotation direction of the stirring means 58 in the hopper is the direction indicated by the arrow in FIG. 7, and the main stirring blade 60 has, as shown in FIG. Has become. Further, the side surface 65 of the auxiliary stirring blade 63 on the front side in the rotation direction on the plane, from the side connected to the holding member 62, that is, from the outer peripheral side of the lower tank portion 47 toward the rotation center side in the rotational direction rearward. It is inclined to face.

FIG. 9 is a side sectional view showing the detailed structure of the feeder 46. As shown in FIG. In FIG. 9, the feeder 46
Has a casing 66 fixed to the lower surface of the soil improving material supply opening 57 in the storage tank 45.

The casing 66 has an inflow port 67 communicating with the soil improvement material supply opening 57 and a supply port 6 opened downward.
8 and a wall at an intermediate portion thereof has an arc-shaped quantitative supply section 6.
It is 9. A rotor 70 is provided inside the fixed-quantity supply unit 69 so as to be fitted to a rotating shaft 71, and the rotor 70 is driven to rotate by a feeder motor (not shown). Rotor 7
At 0, a plurality of partition walls 72 substantially slidably contacting the inner wall surface of the fixed amount supply unit 69 are radially provided, and each time the rotor 70 rotates a predetermined angle, it corresponds to a space between the adjacent partition walls 72. The soil improvement material is separated, and the soil improvement material for the volume of the space is supplied in a fixed amount.

Therefore, by controlling the rotation speed of the rotor 70 to be constant, the supply amount of the soil improving material can be controlled to be constant. In this manner, the feeder 46 is provided with a predetermined supply amount (constant amount) set by adjusting the soil improving material in advance.
Can be supplied at The storage tank 45 is divided into upper and lower parts, and the bellows 49 is provided on the upper side to increase the storage capacity of the soil improvement material in the storage tank 45 and to make the entire self-propelled soil improvement machine a trailer or the like. This is to reduce the height dimension when transporting by using. Hereinafter, this point will be described.

That is, the lower tank portion 47 and the top plate portion 48 are formed of a hard member such as a steel plate.
The bellows portion 49 is capable of extending and contracting in the vertical direction. Thus, when the bellows portion 49 is extended (operating state), a large amount of the soil improving material can be stored inside, while the bellows portion 49 is contracted (retracted state), and the height of the self-propelled soil conditioner is reduced. Is shortened. That is, the bellows 49
Function as height adjusting means of the soil quality improving material supply device 6.

Here, the operating state in which the bellows part 49 is extended and the retracted state in which the bellows part 49 is contracted need to be selectively fixed. For this purpose, mounting plates 73 are provided on the top plate portion 48 so as to extend laterally as shown in FIG. 1, and a support rod 74 is vertically provided on each of the mounting plates 73. . Further, guide cylinders 75 are erected on the base plate 44 at positions corresponding to the vertical positions of the support rods 74, respectively. The support rods 74 are slidably inserted into the guide cylinders 75, respectively. Thus, the guide cylinder 75 and the support rod 74 are fitted in a telescope shape, and the support rod 74 can penetrate the guide cylinder 75 and protrude downward.

At this time, the support rod 74 is provided with two pin insertion holes 76 at the top and bottom (only the upper one is shown in FIG. 1), and the guide cylinder 75 has only one pin insertion hole at a predetermined position. 77 is drilled. When the stopper pin (not shown) is inserted with the insertion hole 76 below the support rod 74 aligned with the guide cylinder pin insertion hole 77, the bellows 49 is maintained in the extended operating state. (The state shown in FIG. 1). On the other hand, when the stopper pin is inserted by aligning the pin insertion hole 76 above the support rod 74 with the pin insertion hole 77 of the guide cylinder 75, the bellows portion 49 is held in the retracted state. .

The earth and sand hopper 2, the vibration feeder 4, the carry-in conveyor 5, and the soil improvement material supply device 6 described above
It functions as a material supply unit that supplies a material for soil improvement comprising soil and soil improvement material.

FIG. 10 is a top view showing the detailed structure of the mixing device 3, and FIG. 11 is a side sectional view taken along the line XI-XI in FIG. 10 and 11, the mixing device 3 includes a truck frame soil improvement machine mounting portion 10A.
A mixing device main body 78, which is provided at a middle portion in the longitudinal direction of the mixing device and is composed of a rectangular container arranged in the longitudinal direction (= substantially horizontal direction), and a front side (left side in FIG. 1) of the mixing device main body 78
A mounting portion 79 which is provided on both sides in the width direction on the rear side (the right side in FIG. 1) and which is mounted on an upper surface of the mounting portion 10A of the truck frame soil improvement device via bolts or the like, and a front side of the mixing device main body 78. An introduction port 80 provided at an upper portion for introducing earth and sand from the carry-in conveyor 5 and soil improvement material from the soil improvement material supply device 6;
A discharge port 81 provided at a lower portion on the rear side of the mixing device main body 78 and an even number (two in this embodiment) of paddle mixers 82 provided in the mixing device main body 78 in parallel with each other.
And

The mixing device main body 78 is connected to the inlet 8.
Portions other than 0 and the discharge port 81 have a closed structure.

The paddle mixer 82 has a rotating shaft 83
And a plurality of blades (paddles) 84 intermittently provided as a stirring / transferring member on the rotating shaft 83, and bearings 85, 85 for rotatably supporting both ends of the rotating shaft 83.

At this time, the rear end of the rotating shaft 83 is extended into a driving section 86 provided at the rear end of the mixing device main body 78. A transmission gear 87 is connected to the rear end of each rotation shaft 83, and both transmission gears 87, 87 mesh with each other. One (upper in FIG. 10) transmission gear 87 is connected to an output shaft of a mixing hydraulic motor 88, and by rotating the mixing hydraulic motor 88,
The two rotating shafts 83 are simultaneously driven to rotate in opposite directions.

At this time, the paddle 84 is
And a predetermined angle (for example, every 90 °) as shown in FIG.
By rotating the rotating shaft 83 as described above, the paddle 84 is driven to rotate, and the earth and sand and the soil reforming material guided into the mixing device main body 78 are agitated and uniform. While being mixed, the liquid is transferred toward the discharge port 81 side. The transfer amount can be appropriately adjusted by changing the angle of the paddle 84.

As described above, the earth and sand introduced from the inlet 80 of the mixing apparatus main body 78 and the soil improving material are uniformly stirred and mixed by the action of the paddle mixer 82 and transferred to the outlet 81. The improved soil is produced during the transfer. The improved soil thus produced is discharged from the discharge port 81 onto the carry-out conveyor 9 by its own weight. At this time, since the mixing device 3 is installed together with other devices and the like on the truck frame soil improvement machine mounting portion 10A, the overall size of the mixing device 3 is limited, but by using the paddle mixer 82, the inside of the container is limited. In this case, stirring and mixing can be performed efficiently.

As described above, the mixing device main body 78
Has a closed shape except for the inlet 80 and the outlet 81, but solid foreign matter or the like enters the mixing device main body 78 and hinders the smooth operation of the paddle mixer 82. The operation of the paddle mixer 82 may be stopped. When a solidifying material such as lime or cement is used as the soil improving material, if the soil improving material remains in the mixing device main body 78,
There is a possibility of sticking to the inner surface of the mixing device main body 78, the paddle 84, or the like. Further, since the paddle 84 wears out over a long period of time, it is necessary to repair or replace it as appropriate. As described above, the opening / closing door 89 is provided on the side surface or the upper surface of the mixing device main body 78 for the purpose of the internal inspection and repair of the mixing device main body 78. Further, the opening and closing door 89 may be provided on the lower surface.

Although not shown in detail, the bottom of the mixing device main body 78 has a curved shape substantially coinciding with the rotation trajectory of the paddle 84, so that the earth and sand and the soil improving material can be removed from the lower end of the mixing device main body. To prevent stagnation in the corners and the like.

The mixing device 3 described above functions as a processing mechanism for stirring and mixing earth and sand with the soil improving material.

The unloading conveyor 9 drives the belt 91 by the unloading conveyor hydraulic motor 90, thereby transporting the mixture (improved soil) that has fallen onto the belt 91 from the mixing device 3. .

The unloading conveyor 9 has a portion near the end on the transport side (in other words, the rear side of the self-propelled soil improvement machine, right side in FIG. 1) suspended from a power unit 93 (details will be described later) via a support member 92. Supported. Further, a portion (not shown) near the end on the non-transport side (the front side of the self-propelled soil conditioner, left side in FIG. 1) and the intermediate portion 94 in the transfer direction are lower than the track frame soil conditioner mounting portion 10A. It is located in. Among them, the transport direction intermediate portion 94 is supported so as to be suspended from the track frame soil improvement machine mounting portion 10A via an intermediate member (not shown), and the portion near the opposite end on the opposite side to the transport side is also supported by the support member ( (Not shown)
And is supported so as to be hung from the truck frame soil improvement machine mounting portion 10A via the base.

With the support structure as described above, the unloading conveyor 9 extends horizontally for a small distance in the transport direction below the mixing device 3 as shown in FIG. In the space below the (end) 95, it is arranged to extend obliquely upward in the carry-out direction (rightward in FIG. 1).

The unloading conveyor 9 described above functions as an improved soil discharging unit.

Here, the sieve unit 1, the vibration feeder 4, the carry-in conveyor 5, the stirring device 74 in the hopper, the mixing device 3, the carry-out conveyor 9, and the crawler crawler 11 are provided in the self-propelled soil improvement machine. It is driven by power from a power source, that is, an engine (not shown) as a prime mover and at least one hydraulic pump (the same) driven by the engine. The pressure oil from the hydraulic pump is
Through a control valve device (not shown) having a control valve for controlling the direction and flow rate of the pressurized oil, the sieve unit 1, the vibration feeder 4, the carry-in conveyor 5, the hopper stirring means 58, the mixing device 3, and the carry-out The vibration hydraulic motors 21 corresponding to the conveyor 9 and the crawler track 11, respectively.
And 29, the carry-in conveyor hydraulic motor, the agitation hydraulic motor 61, the mixing hydraulic motor 88, the carry-out conveyor hydraulic motor, and the left and right traveling hydraulic motors 14 to supply corresponding The hydraulic motor rotates.

The engine, the hydraulic pump, and the control valve device are all provided with a power unit loading member 96 (see FIG. 1) above the other end in the longitudinal direction of the truck frame soil improvement machine mounting portion 10A. The power unit 93 is provided in the mounted power unit 93. As shown in FIG. 1, the power unit 93 is located further to the rear of the self-propelled soil improvement machine than the mixing device 3 (to the right in FIG. 1).

A driver's seat 97, which is a section on which an operator rides, is provided in an area in front of the power unit 93 (left side in FIG. 1) of the self-propelled soil improvement machine. This driver's seat 9
An operation means 98 (7) for switching the left / right traveling control valve (not shown) provided in the control valve device to control the driving speed of the left / right traveling hydraulic motor 14 is provided on the control valve device 7. For example, left and right operation levers) are provided.

The components of the power unit 93 described above are disposed on a power unit frame 99 (see FIG. 1) which forms a basic lower structure of the power unit 93.
The power unit frame 99 is mounted via the power unit loading member 96 (see FIG. 1) above the other end (rear side) in the longitudinal direction of the truck frame self-propelled soil conditioner attaching portion 10A.

In the above, the earth and sand placing plate 2
7 constitutes the plate member described in each claim,
The direction from one side to the other side (from the front side to the rear side of the self-propelled improvement machine, left to right in FIG. 1) of the longitudinal direction of the truck frame soil improvement machine mounting portion 10A corresponds to the conveyance direction, and the vibration feeder The conveyor 4 and the carry-in conveyor 5 constitute a transport unit having a plate member and a vibrating unit. The vibrating means has a driving means and a converting means, and the vibrating driving device 28 constitutes the driving means, and the vibrating shaft 31,
The pulley 32, the belt 33, and the rotating drums 34, 34 constitute the converting means for converting the rotation generated by the driving means into vibration.

Next, the operation and operation of this embodiment will be described below.

For example, when earth and sand are put into the sieve unit 1 of the self-propelled soil improvement machine by a bucket of a hydraulic shovel or the like, the sediment component sorted by the sieve unit 1 and passed through the lattice member 19 is moved downward by the earth and sand hopper 2. Introduced to. The earth and sand put into the earth and sand hopper 2 is placed on the earth and sand placing plate 27 of the vibration feeder 4 below the earth and sand hopper 2, and is conveyed toward the rear of the self-propelled soil improvement machine.

FIGS. 12 and 13 show the state at this time. FIG. 12 is a horizontal sectional view showing a basic operation of the vibration feeder 4, and FIG. 13 is a longitudinal sectional view showing a basic operation of the vibration feeder 4. As shown in FIGS. 12 and 13,
The sediment P on the sediment mounting plate 27 of the vibration feeder 4 is gradually reduced in order toward the rear side of the self-propelled soil improvement machine by the vibration (oscillation) of the sediment mounting plate 27 as shown by an arrow C in FIG. It is slid and flows down onto the belt 40 of the carry-in conveyor 5 through the earth and sand supply opening 36 of the earth and sand hopper 2, and is further conveyed by the carry-in conveyor 5 to the rear of the soil conditioner (right side in FIG. 1). Is done. Loading conveyor 5
In the vicinity of the downstream end in the transport direction, a predetermined amount of soil improving material is added from the storage tank 45 to the surface of the transported sediment P via the feeder 46, and the mixture thereof is introduced into the mixing device 3.

The earth and sand and the soil improvement material introduced into the mixing device 3 are uniformly stirred and mixed by the paddle mixers 82 and 82 in the mixing device main body 78 to form aggregated improved soil to form a belt of the unloading conveyor 9. It is discharged onto 91. And
The improved soil is further conveyed to the rear of the self-propelled soil conditioner by the carry-out conveyor 9 and finally discharged from the rear part of the self-propelled soil conditioner.

Here, in a soil improvement operation using a conventional soil improvement machine that does not use a vibration feeder as a conveying means, a carry-in conveyor is provided substantially directly below a sand hopper, and the carry-in conveyor is a feeder of a soil improvement material supply device. Is provided so as to extend to the vicinity immediately below. The earth and sand put into the earth and sand hopper is placed on the belt of the carry-in conveyor, and is conveyed to the rear of the soil improvement machine by the carry-in conveyor. In addition, a sediment supply opening of a predetermined size is provided on a wall on the conveyance direction side of the carry-in conveyor of the earth and sand hopper, and only the conveyed earth and sand that has passed through the earth and sand supply opening is out of the earth and sand hopper. It is conveyed and introduced into the mixing device, so that the amount (volume) of the supplied sediment is made constant.

However, even with the same volume of earth and sand, the amount of sediment deposited in the earth and sand hopper, the water content of the earth and sand,
In addition, since the density and viscosity of the earth and sand may change due to soil characteristics and the like, and the weight (self-weight) may change, there is a possibility that a certain amount of earth and sand cannot always be supplied to the mixing device.
In particular, in the case of highly viscous earth and sand, the force of the viscosity exceeds the frictional force from the belt due to its own weight of the earth and sand, and the belt of the carry-in conveyor slips, which may make the conveyance itself difficult. Therefore, there is a possibility that the mixing ratio between the soil and the soil improvement material may vary, and it is difficult to stably produce high quality improved soil.

Therefore, in the present embodiment, one of the transport means is used.
The vibratory feeder 4 is provided as one of them, and the sediment P put into the sediment hopper is placed on the sediment placing plate 27, and the sediment placing plate 27 is vibrated, and the sediment placing plate 2
7 is transported by sequentially moving the earth and sand P in the transport direction (the rear of the soil improvement machine). By performing the conveyance using the vibration in this manner, the conveyance amount of the sediment P can be mainly set only by the frequency and amplitude of the vibration of the sediment mounting plate 27. If the amplitude is kept constant, the earth and sand transport amount can be easily made constant regardless of the density and viscosity of the earth and sand P. Thereby, since the quantitative supply of the earth and sand P to the mixing device 3 can be reliably performed, the mixing ratio of the earth and sand P and the soil improving material in the mixing device 3 can be maintained with high accuracy.

The frequency of the earth and sand mounting plate 27 can be controlled by adjusting the number of revolutions of the vibration feeder hydraulic motor 29, and the amplitude can be easily adjusted by adjusting the uneven weight distribution of the rotary drum 34 in advance. Can be set to a predetermined value.

Further, in the embodiment of the self-propelled soil improvement machine of the present invention, the earth and sand placing plate 27 is horizontally provided substantially directly below the earth and sand hopper 2, but the earth and sand placing plate shown in FIG. As in the case of the plate 100, it may be inclined downward in the transport direction. Thereby, the earth and sand placing plate 1
00 on the earth and sand P placed on the sand
In addition to the action of the vibration of 00, the action of gravity caused by the inclination of the sediment placing plate 100 downward in the transport direction is added, so that the sediment transporting ability can be further improved, and the sediment transport on the sediment placing plate 100 can be improved. The movement in the transport direction can be made smoother, and the fixed amount can be supplied more reliably.

Further, in the above-described embodiment of the present invention, the feeder 46 is fed from the soil improving material feeder 6 onto the earth and sand which is constantly fed onto the conveyor belt 40 of the carry-in conveyor 5 by the vibrating feeder 4. The mixing ratio of the soil and the soil improving material was stabilized by supplying the soil improving material at a predetermined supply amount (constant amount) adjusted and set in advance. However, when it is desired to control the mixing ratio with higher accuracy, the rotor 70 is required to be further adjusted in accordance with the amount of soil.
May be controlled to control the supply amount of the soil improvement material. For example, a known earth and sand weight detection mechanism (not shown) for detecting the weight of earth and sand (strictly speaking, a mixture of earth and sand and a soil improvement material) conveyed by the conveyor belt 40 is provided on the unloading conveyor 9. The detection signal is input to, for example, a controller (not shown), and the controller controls the rotation speed of the hydraulic motor of the feeder 46 according to the detection signal, and adjusts the supply amount of the soil improving material from the soil improving material supplying device 6. adjust. That is, when the amount of the mixture increases (in other words, when the amount of earth and sand increases), the rotation speed of the rotor 70 is increased to increase the supply amount of the soil improving material, and when the amount of the mixture decreases (the amount of earth and sand decreases). (If it is,) the rotation speed of the rotor 70 is made slow to reduce the amount of rain supplied with the soil improvement material.

Here, the earth and sand weight detection mechanism does not directly measure the amount of earth and sand supplied to the mixing device 3 in the carry-in conveyor 5, but the amount of the mixture of earth and sand and the soil improving material on the carry-out conveyor 9 ( Weight).
Since the amount of sediment can be indirectly detected also by detecting the weight of the mixture, the mixing ratio between the supplied sediment and the soil improving material can be controlled accordingly.

In this case, it is desirable to use a variable speed electric motor as the feeder motor in order to control the supply of the soil improvement material by the rotation of the rotor 70 with high precision. If the speed is made variable, a hydraulic motor may be used.

Further, in the embodiment of the present invention, the mixing of the earth and sand with the soil improving material is performed in the mixing apparatus 3 by a mixing method using a stirring means. However, the present invention is not limited to this. As described in JP-A-9-195265, a mixing apparatus using a so-called crushing method may be used. Further, in the above-described embodiment of the present invention, the case where the crawler track 11 is provided as the traveling means has been described as an example. However, the invention is not limited to this, and the traveling means may be configured by a wheel type or the like. Further, the sieve unit 1 provided on the earth and sand hopper 2 is a vibrating sieve, but is not limited to this, and may be a fixed sieve. In these cases, a similar effect is obtained. In one embodiment of the present invention,
The sediment supply opening 36 in the side wall 2d on the rear side of the soil improvement machine of the sediment hopper 2 has a fixed structure, but is not limited to this. ) May be variable. At this time, the gate may be adjusted in two or three steps, or the height may be arbitrarily adjusted within a certain range. In this way, by adjusting the opening area for discharging the sediment P, the supply amount of the sediment P can be more finely adjusted in addition to the above-described conveyance amount control on the vibration feeder 4 side.

Further, in one embodiment of the present invention, when introducing the sediment P from the sieve unit 1 into the opening of the sediment hopper 2, a means for preventing the sediment P from spilling or leaking is particularly provided. Although not provided, for example, a side cover made of a rubber plate or the like may be hung from the vicinity of the lower surface of the grid member 19 of the sieve unit 1 to the inside of the earth and sand hopper 2 to prevent the above-mentioned spilling and leakage of the earth and sand. .

[0083]

According to the present invention, the conveying means is provided with a vibrating feeder and conveys by using vibration. Therefore, if the vibrating operation by the vibrating means is controlled to be constant, the conveying capacity can be increased.
Even if the density and viscosity of the earth and sand change, they are not affected. Therefore, even when various kinds of earth and sand are targeted for improvement, the quantitative supply of the earth and sand to the mixing device can be reliably performed, and the mixing ratio between the earth and sand and the soil quality improving material can be maintained with high accuracy.

[Brief description of the drawings]

FIG. 1 is a side view showing the overall structure of an embodiment of a self-propelled soil conditioner of the present invention.

FIG. 2 is a top view of the self-propelled soil conditioner shown in FIG.

FIG. 3 is a side view showing a detailed structure of a sediment hopper and a vibration feeder shown in FIG.

FIG. 4 is a perspective view showing a detailed structure of a sediment hopper and a vibration feeder shown in FIG.

FIG. 5 is a transverse sectional view taken along a line VV in FIG. 3;

FIG. 6 is a side sectional view showing the entire structure of the soil improving material supply device shown in FIG.

FIG. 7 is a horizontal sectional view taken along the line VII-VII in FIG. 6;

FIG. 8 is a transverse sectional view taken along the line VIII-VIII in FIG. 7;

FIG. 9 is a side sectional view illustrating a detailed structure of the feeder illustrated in FIG. 6;

FIG. 10 is a top view illustrating a detailed structure of the mixing device illustrated in FIG.

11 is a side sectional view taken along the line XI-XI in FIG. 10;

FIG. 12 is a horizontal sectional view showing a basic operation of the vibration feeder shown in FIG.

FIG. 13 is a longitudinal sectional view showing a basic operation of the vibration feeder shown in FIG.

FIG. 14 is a view showing a modification in which the earth and sand mounting plate is inclined downward in the transport direction.

[Explanation of symbols]

2 Sediment hopper 3 Mixing device 4 Vibration feeder (conveying means) 5 Carry-in conveyor (conveying means) 9 Unloading conveyor (conveyor) 27 Sediment placing plate (plate member) 28 Vibration driving device (driving means, vibrating means) 31 Vibration axis (converting means, vibrating means) 32 Pulley (converting means, vibrating means) 33 Belt (converting means, vibrating means) 34 Rotary drum (converting means, vibrating means) 100 Sediment loading plate (plate member) P earth and sand

Continued on the front page (72) Inventor Fujio Sato 650, Kandamachi, Tsuchiura-shi, Ibaraki Prefecture F-term in the Tsuchiura Plant of Hitachi Construction Machinery Co., Ltd. (Reference) 2D040 AB07 CD07 EA02 EB07

Claims (3)

[Claims] 1. A self-propelled soil improvement machine for introducing earth and sand into a mixing device via a conveying means, mixing the soil with a soil improving material, and discharging the mixture by a conveyor, wherein the conveying means comprises: A vibration feeder comprising: a plate member on which the earth and sand put in the earth and sand hopper is placed; and a vibration unit that vibrates the plate member and moves the earth and sand on the plate member in the transport direction. Self-propelled soil improvement machine. 2. The self-propelled soil improvement machine according to claim 1, wherein said vibrating means includes a driving means for generating a rotational driving force, and a converting means for converting the rotational driving force into vibration of the plate member. A self-propelled soil improvement machine characterized by comprising: 3. The self-propelled soil improvement machine according to claim 1, wherein said plate member is disposed so as to be inclined downward toward said transport direction. Type soil improvement machine.