JP2002274655A - Powder feeder and self-running soil improving machine loaded with it - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a powder feeder capable of reducing variation in feed amount, resolving a powder jam and reducing rotational resistance, and a soil improving machine loaded with it. SOLUTION: A thin plate 50 is rotatably substantially horizontally provided above a lower face plate 12 having a first discharge opening provided below a powder feeding hopper 10. A case 21 is formed by an upper plate 22 having a supply opening to the powder feeder, a base plate 23 having a second discharge opening and a drum plate 24 below the lower face plate 12. A rotor having an inner member 2 and a plurality of feeder blades 43 fitted thereto is disposed in the case 21, and a clearance gap between the lower face of the upper plate 22 and the top face of the rotor 40 is set small to form a labyrinth part 45.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a powder supply device for constantly supplying a fixed amount of powder, and a self-propelled soil improvement machine equipped with the powder supply device.

[0002]

2. Description of the Related Art Several examples of a conventional powder supply apparatus have been proposed. One example is Japanese Patent Application No. 2000-1.
There is one disclosed in Japanese Patent No. 44717.

FIG. 11 is a side sectional view of an improvement material hopper and an improvement material supply device for a self-propelled soil improvement machine disclosed in Japanese Patent Application No. 2000-144717, and FIG.
FIG. 11 and 12, the hopper 1
In the lower part of 0, a case 21 composed of an upper plate 22, a bottom plate 23 having a discharge port 26a, and a cylindrical body plate 24 is provided. The outer member 41 and the inner member 4
2 and a rotating body 40 composed of a plurality of feeder blades 43 forming a square 44 by connecting the outer member 41 and the inner member 42 to each other via a bearing 46 so as to be rotatable. Make up. The lower end of the hopper 10
The opening is opened in approximately half of the rotating body 40 in a plan view, and the powder improving material is filled in the rotating body 40 in the P portion, and then the upper part is quantitatively measured by the cutting plate 31 provided at the end of the opening. It is designed to be worn. As shown in FIG. 12, the upper plate 22 is provided above the discharge port 26a so as to cover substantially half of the rotating body 40 in plan view, and as shown in FIG.
A gap K is provided between the lower surface of the rotating body 2 and the upper surface of the rotating body 40. The cover 7 is provided above the outlet 26a of the upper plate 22.
0 is attached to open and close freely. The rotating body 40 is rotationally driven by two motors 47, 47 in a direction indicated by a white arrow. The belt conveyor 6 is disposed below the discharge port 26a, and the shape of the edge 27 of the discharge port 26a on the upstream side with respect to the rotation direction of the rotating body 40 is such that the central portion thereof is convex in the rotation direction of the rotating body 40. It has a curve.

Next, the operation will be described. The improving material (powder such as cement and quicklime) charged into the hopper 10 is filled in the rotating body 40 at the portion P, is cut off by the scoring plate 31, and a predetermined amount is discharged with the rotation of the rotating body 40. Exit 26
a to be supplied on the soil to be improved on the belt conveyor 6. Thereafter, the mixture is mixed by a mixing device (not shown) to obtain a desired improved soil. During the operation, the inner member 42 of the rotating body 40 is
When the improving material adheres to the inner wall surface of the square 44 surrounded by the outer member 41 and the feeder blade 43, an error occurs in the supply amount. Therefore, the operator opens the cover 70 and cleans the inside of the rotating body 40 as necessary.

[0005]

However, the above configuration has the following problems. A large gap K is provided between the lower surface of the upper plate 22 of the case 21 and the upper surface of the rotating body 40, and the distance between the cutting plate 31 and the discharge port 26a is short in plan view. Therefore, for example, when the improving material is pressure-fed to the hopper 10 by air, the excess improving material extruded by the pressure of the air is discharged from the discharge port 26a through the gap K, and the supply amount from the improving material supplying device is supplied. Therefore, a desired improved soil cannot be obtained because the mixing ratio with the soil changes. In addition, there is a problem that the cost is increased because the improving material is used extra. If the improving material in the hopper 10 is in a compacted state, particles of the improving material support each other, or particles adhere to each other due to moisture, viscosity, etc., each cell 44 of the improving material supplying device
After the improvement material is filled, the improvement material is likely to form rat holes and bridges, so that the improvement material may not be constantly and smoothly filled in each square 44. For this reason, the supply amount of the improving material from the improving material supply device may vary. The center of the edge 27 of the outlet 26a of the improving material supply device 20a has a convex shape in the rotation direction of the rotating body 40.
For this reason, there is a problem that a part of the dropped improving material is scattered on the left and right sides of the belt conveyor 6, is not evenly supplied on the belt conveyor 6, and a uniform high quality improved soil cannot be obtained. In the case of a humid or slightly viscous improving material, the inner member 42 and the outer member 4
Since the improving material adheres to the respective wall surfaces of the squares 44 formed by the feeder blades 1 and the feeder blades 43 and the internal volume of the squares 44 decreases, the supply amount changes. For this reason, the operator must open and clean the cover 70, which is troublesome. Between the body plate 24 of the case 21 and the outer member 41 of the rotating body 40, or between the upper plate 22 of the case 21 and the rotating body 40.
In some cases, the improving material may be clogged during this time, resulting in a large rotational resistance and a large driving force.

The present invention has been made in view of the above-mentioned problems, and it is possible to reduce the variation in the amount of powder to be supplied, to uniformly supply the powder on a vietnam conveyor, and to eliminate the clogging of the powder. It is an object of the present invention to provide a powder supply device which can be easily formed, has low rotational resistance, and saves driving force, and a soil improvement machine equipped with the powder supply device.

[0007]

In order to achieve the above object, a first invention is to provide a lower plate having a first discharge port below a hopper for supplying powder, and A plate having a plate thickness of 4 mm to 20 mm disposed substantially horizontally above the discharge port 1 is rotatably provided.

According to the first aspect of the present invention, the rotatable, horizontally disposed plate is provided above the first discharge port of the hopper. Before the particles of each other support each other or adhere to each other due to moisture, viscosity, etc., vibration is applied by this plate to prevent rat holes and bridges from being formed in the powder above the first discharge port. . Therefore, the powder can be constantly discharged from the first discharge port. Further, since a thin plate arranged substantially horizontally is rotated in the horizontal direction, the rotation resistance is small, and power can be saved.

According to a second aspect based on the first aspect, the substantially horizontally disposed plate has a configuration in which the width of the distal end portion is smaller than the width of the proximal end portion in plan view.

According to the second aspect of the present invention, since the distal end of the plate is made thinner than the base end, the powder is not compacted between the distal end of the plate and the inner surface of the hopper. Therefore, no large rotational resistance is generated, and power can be saved.

A third invention is based on the first or second invention,
The plate arranged substantially horizontally has a configuration in which the tip portion is inclined in the rotation direction in plan view.

According to the third aspect of the present invention, since the tip of the plate is inclined in the rotation direction, the outer powder inside the hopper is scraped inward, and the occurrence of compaction at the outer periphery of the hopper can be prevented.

According to a fourth aspect of the present invention, there is provided a case formed by an upper plate and a bottom plate, a body plate provided between the upper plate and the bottom plate, an inner member in the case, and a plurality of members attached to the inner member. A rotating body having a plurality of feeder blades, a powder supply port for the rotating body provided on the upper plate, and a second discharge port provided on the bottom plate. The outlet is
A belt conveyor is provided over substantially the entire width of the belt conveyor disposed below the second discharge port.
The shape of the edge on the upstream side of the discharge port is formed such that the normal of the edge is directed to the center line of the belt conveyor in the rotation direction of the rotating body.

According to the fourth invention, the second discharge port of the powder supply device is provided over substantially the entire width of the belt conveyor, and the shape of the edge on the upstream side of the second discharge port is changed to the normal line of the edge. Are formed so as to face the center line of the belt conveyor in the rotation direction of the rotating body. Therefore, much of the powder discharged from the second discharge port is discharged near the center of the belt conveyor,
As a result, almost evenly over the entire width of the belt conveyor,
And it is supplied without spilling from the left and right ends,
It is possible to supply a constant amount of powder without bias.

According to a fifth aspect of the present invention, there is provided a case formed of a hopper, an upper plate and a lower plate provided below the hopper, and a body plate provided between the upper plate and the bottom plate. A rotating body including an inner member and a plurality of feeder blades attached to the inner member, a supply port for powder to the rotating body provided on the upper plate, and a second discharge port provided on the bottom plate. In the powder supply device provided with, the supply port is provided over a plurality of feeder blades, and is formed to be inclined from the inner member side to the outside in the rotation direction of the rotating body. And

According to the fifth aspect, the supply port of the powder to the rotating body of the feeder is provided over a plurality of feeder blades, and is directed outward from the inner member of the rotating body in the rotating direction of the rotating body. It was formed by tilting. Therefore, as the rotating body rotates, the powder is gradually supplied and filled from the inside to the outside between the feeder blades, so that the powder can be uniformly filled between the feeder blades of the rotating body. In addition, the accuracy of the supply amount can be improved. Further, since the powder is finally supplied to the outside, it is difficult to consolidate the powder on the outside, so that the rotational resistance can be reduced.

According to a sixth aspect of the present invention, there is provided a case formed of a hopper, an upper plate and a bottom plate provided below the hopper, and a body plate provided between the upper plate and the bottom plate. An inner member, a rotating body including a plurality of feeder blades attached to the inner member are provided, a supply port for powder to the rotating body is provided on the upper plate, and a second discharge port is provided on the bottom plate. In the provided powder supply device, a plate disposed substantially horizontally above the upper plate having the supply port is rotatably provided, and the supply port and the second discharge port are provided at a rotation center of the rotating body. for,
They are arranged so as to be substantially opposed to each other.

According to the sixth aspect, the rotatable plate is provided below the hopper, and the powder supply device is provided below the hopper, so that the powder in the hopper is periodically vibrated by the rotation of the plate. The powder feeding device is used to prevent the formation of rat holes and bridges due to compaction of the powder above the discharge port, support of the particles of the powder, or adhesion due to moisture or viscosity. Powder is supplied smoothly. In addition, the supply port and the second discharge port of the powder supply device were disposed substantially opposite to each other with respect to the center of rotation. For this reason, the distance between the supply port and the second discharge port becomes longer. For example, even when powder is pressure-fed into the hopper by air, the second pressure is supplied from the supply port by air pressure.
The amount of powder leaking to the discharge port of the second discharge port is small, and the amount of extra powder discharged from the second discharge port is reduced. As a result, the accuracy of the amount of powder supplied from the powder supply device to the outside can be improved.

According to a seventh aspect of the present invention, there is provided a case formed of a hopper, an upper plate and a bottom plate provided below the hopper, and a body plate provided between the upper plate and the bottom plate. An inner member, a rotating body including a plurality of feeder blades attached to the inner member are provided, a supply port for powder to the rotating body is provided on the upper plate, and a second discharge port is provided on the bottom plate. In the provided powder supply device, an upper surface of the rotating body and a lower surface of the upper plate are brought close to each other to form a labyrinth.

According to the seventh aspect, the labyrinth is formed between the upper surface of the rotating body of the powder supply device and the lower surface of the upper plate, so that, for example, even when the powder is pressure-fed into the hopper by air, the rotation is prevented. Since it is difficult for powder to enter through the gap between the upper body surface and the lower surface of the upper plate, the amount of extra powder discharged from the second discharge port by air pressure is reduced, and the accuracy of the powder supply amount can be improved.

An eighth invention is based on the sixth or seventh invention,
The supply port to the rotating body is provided so as to extend over a plurality of feeder blades, and is formed so as to be inclined from the inner member of the rotating body outward in the rotating direction of the rotating body.

According to the eighth invention, in addition to the effect of the sixth or seventh invention, since the supply port of the feeder is inclined in the rotation direction from the inner member of the rotating body toward the outside, each of the feeders is inclined as the rotating body rotates. Since the powder is gradually supplied and filled from the inside to the outside between the feeder blades, the powder can be uniformly filled between the respective feeder blades of the rotating body, and the accuracy of the powder supply amount is further improved. Can be improved. Further, since the powder is finally supplied to the outside of the grid between the feeder blades, the powder on the outside is less likely to be compacted, and the rotational resistance can be reduced.

A ninth invention is based on the sixth or seventh invention,
A cleaning device for cleaning at least one of the inside of the rotating body, the gap between the upper surface of the rotating body and the lower surface of the upper plate, and the inner peripheral surface of the case is provided.

According to the ninth invention, a cleaning device (for example, air for cleaning with air) for cleaning at least one of the inside of the rotating body, the gap between the upper surface of the rotating body and the lower surface of the upper plate, and the inner peripheral surface of the case. Spouts, etc.)
The clogging and adhesion of the powder to each part are prevented beforehand. Accordingly, the accuracy of the amount of powder supplied from the powder supply device can be improved, and the rotational resistance of the rotating body can be reduced to save power.

According to a tenth aspect of the present invention, an improved soil hopper, a hopper for soil improvement material, an upper plate and a bottom plate attached to a lower portion of the hopper, and an upper plate and a bottom plate of the hopper are provided on a vehicle body having a lower traveling body. A case formed by a body plate provided between the body and a rotating body having an inner member and a plurality of feeder blades attached to the inner member provided in the case; To provide a supply port for the improved material to the rotating body,
A powder feeder provided with a second discharge port in the bottom plate, rotating the rotating body to move the improving material received from the supply port, and discharging a predetermined amount of the improving material from the second discharge port, and a hopper Self-propelled soil improvement machine equipped with a mixing device that improves the soil quality by mixing the soil from the powder and the improving material from the powder supply device. The rotatable plate is provided rotatably, and the supply port and the second discharge port of the powder supply device are disposed so as to be substantially opposed to each other with respect to the rotation center of the rotating body.

According to the tenth aspect, since the plate is provided so as to be substantially horizontally rotatable above the upper plate having the supply port at the lower portion of the hopper for soil improvement material, the improvement material is smoothly supplied to the powder supply device. Is done. Further, since the supply port from the hopper of the powder supply device and the second discharge port are provided so as to be substantially opposed to each other with respect to the center of rotation, the second material can be supplied even if the improving material is pressure-fed to the hopper by air. The variation in the supply amount of the improving material from the discharge port is reduced. As a result, a self-propelled soil improvement machine with improved material supply accuracy can be obtained.

According to an eleventh aspect based on the tenth aspect, the upper surface of the rotating body of the powder supply device and the lower surface of the upper plate are brought close to each other to form a labyrinth.

According to the eleventh aspect, since the labyrinth is provided between the rotating body and the upper plate of the powder supply device, the variation of the supply amount of the improving material from the powder supply device is reduced, and the accuracy of supplying the improving material is improved. A better self-propelled soil improvement machine can be obtained.

[0029]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a powder feeder according to the present invention and a self-propelled soil improvement machine equipped with the same will be described below in detail with reference to the drawings.

FIG. 1 is a side sectional view of a powder supply device 20 disposed below the hopper 10, and FIG.
FIG. 3 is a view taken in the direction of arrows, and FIG. 3 is a view taken in the direction of arrows BB in FIG. Figure 1,
2 and 3, a cylindrical member 1 is provided below the hopper 10.
1 is provided, and a lower surface plate 12 attached to a lower portion of the cylindrical member 11 is provided with a first discharge port 13. still,
The hopper 10 here stores powder such as an improving material,
That is, it refers to a hopper main body and, for example, a feed conduit connected to a lower portion of the hopper main body and guided to a predetermined place, and the lower surface plate 12 is provided at a lower portion of such a feed conduit or the like. This includes what is done. Below the lower surface plate 12, a case 21 is formed by an upper plate 22, a bottom plate 23, and a cylindrical body plate 24. A case 21 is formed at a position of the upper plate 22 corresponding to the first discharge port 13. Is provided with a supply port 25. Inside the case 21, a plurality of feeders that connect a cylindrical outer member 41, a cylindrical inner member 42, and the outer member 41 and the inner member 42, and partition the cells into a plurality of squares 44 each having a predetermined volume. A rotating body 40 having a blade 43 is housed. The rotating body 40 is a bearing 4 having inner teeth 46a on the inner ring.
6, three motors 47, 4 each having a pinion 47a rotatably supported by the inner teeth 46a.
7, 47 are driven to rotate. The rotation direction of the rotating body 40 is a direction indicated by a white arrow in FIGS. A gap S between the upper end surface of the outer member 41, the inner member 42, and the lower surface of the upper plate 22 of the case 21 and the lower surface of the upper plate 22 of the case 21 is set small, and a labyrinth portion 45 is formed therebetween. The gap S is, for example, about 3 mm.

As shown in FIG. 2, a first discharge port 13 provided on the lower plate 12 and a supply port 2 provided on the upper plate 22 are provided.
5 has the same shape and is in communication with each other, and a side plate 30 connecting the lower plate 12 and the upper plate 22 is provided around the same. The first discharge port 13 and the supply port 25 are provided over a plurality of feeder blades 43, and the shape thereof is changed from the inner member 42 of the rotator 40 toward the outer member 41.
It is formed to be inclined in the rotation direction of 0. Here, the opening area of the supply port 25 is formed so as to gradually increase from the inside to the outside. The rotating body 4 of the supply port 25
A grinding plate 31 is attached to the downstream end of the zero rotation direction. In the present embodiment, the upper plate 22 of the case 21 is provided below the lower plate 12, but the height of the rotating body 40 may be increased so that the lower plate 12 and the upper plate 22 may be the same member. .

FIG. 4 is a view taken in the direction of the arrows C--C in FIG. 2, and the cut-off plate 31 is provided at the end of the supply port 25.
It is fastened by bolts 33 to a plate member 32 connecting the upper plate 22 and 2. The lower end surface of the sliding plate 31 protrudes from the lower surface of the upper plate 22 by a predetermined length H smaller than the gap S. The value of H is, for example, 1 mm.

In FIG. 3, a second discharge port 26 is provided in the bottom plate 23 of the case 21.
Below the belt is a belt conveyor 6 that transports the discharged powder.
Is arranged. A pair of guide plates 6a, 6a are disposed on both left and right sides of the belt conveyor 6, to prevent a conveyed material such as an improved soil from spilling left and right. The second discharge port 26 is provided substantially at right angles to the conveying direction of the belt conveyor 6 over substantially the entire width between the guide plates 6a, 6a.
The shape of the edge 27 on the upstream side with respect to the rotation direction of the
The normal line 7 is formed so as to face the center line XX of the belt conveyor 6 in the rotation direction of the rotating body 40 as indicated by the arrow in the figure. Then, as shown in FIG. 2, the supply port 25 and the second discharge port 26 are provided at positions substantially facing the rotation center of the rotating body 40.

1 and 2, a thin plate 50 having a small thickness in the vertical direction is horizontally disposed above the lower plate 12. The thickness is 4 mm to 20 mm depending on the type of powder and the like. In the present embodiment, the thickness is 6 mm. Board 5
Numeral 0 is fastened by a bolt 53 to a cover plate 48 attached to the upper surface of the bearing 46, and rotates together with the rotating body 40. As shown in FIG. 2, the plate 50 is composed of a long plate 51 and a short plate 52. The tip of the long plate 51 is close to the inner peripheral surface of the cylindrical member 11, and the tip of the short plate 52 is a rotating body. 40 is located substantially in the middle between the outer member 41 and the inner member 42. Both the long plate 51 and the short plate 52 have sharp tips, and are inclined in the rotation direction.

As shown in FIG. 3, the powder supply device 20 is provided with a cleaning device 60. The cleaning device 60 includes three air nozzles 61a, 61b, and 61c attached to the body plate 24 of the case 21. FIG. 5 is a view taken in the direction of arrow D-D in FIG.
Reference numeral 1 a is attached to the lower side of the body plate 24, and blows compressed air into a labyrinth portion 45 between the lower surface of the upper plate 22 and the upper surface of the rotating body 40. 6 is a view taken in the direction of arrows EE in FIG. 3. The air nozzle 61b is attached to the lower part of the side surface of the body plate 24, and the compressed air is supplied to the body plate 24 and the rotary
0 and the outer member 41. Further, FIG. 7 is a view taken along the line FF of FIG.
1c is attached obliquely upward to the lower surface of the bottom plate 23,
Compressed air is blown from the lower part of the second discharge port 26 in the direction of the arrow in FIG.

FIG. 8 is a side view of the hopper 10, and FIG. 9 is a plan view thereof. Below the hopper 10, the cylindrical powder supply device 20 described above is arranged. The upper portion of the hopper 10 is a quadrangle in plan view, and the lower portion forms a polygon along the outer peripheral surface of the cylindrical member 11 provided at the lower portion of the hopper, and is a dodecagon in the present embodiment.
The upper part forming a quadrangle and the lower part forming a dodecagon are connected by a plurality of rectifying plates 10a, 10b, 10c..., And the angle α between the surface of each rectifying plate 10a, 10b, 10c. Are all larger than the angle of repose of the powder. In the present embodiment, α is configured to be 45 ° or more. In FIG. 8, the angle α between the surface of the current plate 10e and the horizontal plane is typically shown.

The operation and effect of the above configuration will be described below. Since the labyrinth portion 45 is formed by reducing the gap S between the lower surface of the upper plate 22 constituting the case 21 and the upper surface of the rotating body 40, the supply port 25 and the second discharge port 26
And the passage resistance of the powder between them increases. In addition, supply port 2
5 and the second discharge port 26 are provided at positions opposite to the rotation center of the rotating body 40, so that the resistance of the passage of the powder between the supply port 25 and the second discharge port 26 is further increased. . Therefore, for example, even when the powder is fed to the hopper 10 by air, the powder is supplied to the supply port 2 by air pressure as in the related art.
5 is extruded through a gap between the second discharge port 26 and the second discharge port 26, and the amount of powder discharged from the second discharge port 26 is smaller than a predetermined amount. Can be improved.

The supply port 25 is provided over a plurality of feeder blades 43 of the rotating body 40, and is formed to be inclined in the rotating direction from the inner member 42 side of the rotating body 40 to the outer member 41 side. Therefore, as the rotating body 40 rotates, the powder is gradually supplied from the inside to the outside of each cell 44 and is uniformly filled, so that the amount becomes constant, and the accuracy of the supply amount of the powder is improved. Further, since the powder is finally supplied to the outside of each cell 44, the powder is hardly compacted in the vicinity of the outer member 41 of the rotating body 40, and the rotational friction resistance between the powder and the cutting plate 31 is small. Become. Furthermore, the cutting plate 31
And the lower end thereof is protruded from the upper plate 22 by a predetermined length, so that the rotational frictional resistance between the powder in each square 44 after being cut by the cutting plate 31 and the lower surface of the upper plate 22 is reduced. However, the driving force of the rotating body 40 can be further reduced.

A second discharge port 26 is provided over substantially the entire width of the belt conveyor 6, and the shape of the edge 27 on the upstream side in the rotation direction of the rotating body 40 is defined by the normal of the edge 27 and the rotating direction of the rotating body 40. , So as to face the center line of the belt conveyor 6. For this reason, the discharged powder increases in the vicinity of the center line of the belt conveyor 6 and scatters to the left and right, and as a result, is scattered substantially evenly on the belt conveyor 6, and reliably without spilling to the left and right. Supplied, it is possible to supply the powder quantitatively without bias.

Above the lower plate 12 provided at the lower part of the hopper 10, a plate 50 made of a thin plate having a plate thickness of about 4 mm to 20 mm and having a long plate 51 on one side and a short plate 52 on the other side is substantially horizontal. And provided rotatably. Due to the rotation of the plate 50, the powder in the hopper 10 is periodically vibrated,
A rat hole or a bridge is prevented from being formed due to compaction of the powder above the (supply port 25), support of the particles of the powder, or adhesion due to moisture or viscosity. Therefore,
Powder is smoothly supplied from the first discharge port 13 (supply port 25) to each square 44 of the rotating body 40, and the accuracy of the supply amount of the powder supply device is improved. In addition, the tip of the long plate 51 is brought close to the inner peripheral surface of the cylindrical member 11 of the hopper 10, and
Since the distal end of the plate 50 (here, the distal end of the long plate 51) is sharper than the base end, the powder is compacted between the inner peripheral surface of the cylindrical member 11 and the distal end of the long plate 51. Never.
In addition, since the entire plate 50 has a thin plate structure in the rotation direction, the rotational resistance of the plate 50 is reduced, and the driving force can be reduced. Since the short plate 52 shorter than the long plate 51 is provided on the other side, the rotation resistance can be reduced as compared with the case of the long plate 51. Further, since the tip portion is inclined in the rotation direction, the powder on the outer peripheral portion of the hopper 10 is scraped inward,
It is possible to prevent the occurrence of consolidation at the outer peripheral portion of the hopper, and it is easy to scrape the powder when the amount of the powder in the hopper 10 is reduced by stopping the supply of the powder to the hopper 10. Powder residue can be reduced.

A cleaning device 60 is provided at a predetermined position of the powder supply device 20 to clean the powder in the gap between the upper plate 22 and the body plate 24 of the case 21 and the rotating body 40 with compressed air. Clogging is reduced, so that rotational resistance is reduced, and power can be reduced. Further, since the inside of each of the squares 44 formed between the respective feeder blades 43 of the rotating body 40 is cleaned, the improving material does not adhere to the inner wall of each of the squares 44, the capacity of each of the squares 44 is always constant, and the Variations in the amount of powder supplied from the body supply device 20 can be reduced, and supply accuracy can be improved.

The upper part of the hopper 10 is made into a quadrangle, the lower part is made into a polygonal shape close to a circle, and a plurality of rectifying plates 10a, 1
. 0b, 10c,..., A large capacity hopper 10 can be obtained with a small field product relative to the cylindrical hopper. Moreover, since the angle formed between the horizontal plane and the surfaces and ridges of each of the plurality of straightening plates 10a, 10b, 10c... Is larger than the angle of repose of the powder, the flow of the powder in the hopper 10 becomes smoother There is no clogging of powder in the hopper 10.

In the above embodiment, the rotating body 4
0, the outer member 41 is provided.
You don't have to have one. In this case, the rotating body 40 is supplied with powder in a grid formed by the inner member 42, the feeder blade 43, and the body plate 24 of the case 21, and the grid is supplied at a constant rate.

FIG. 10 is a side view of the self-propelled soil improvement machine 1 equipped with the hopper 10 and the powder supply device 20 according to the present invention. An example of the traveling soil improvement machine 1 will be described. In FIG. 10, a mixing device 4 is mounted substantially at the center of a vehicle body 3 having a crawler-type lower traveling body 2, and a hopper 10 for soil improvement material and a powder for quantitatively supplying the improvement material are provided behind the mixing device 4. The body supply device 20 is mounted. The hopper 10 includes a rotatable plate 50 above the lower plate 12 as described above (see FIG. 1). As described above (see FIG. 2), the powder supply device 20 rotates the supply port 25 for supplying the improving material from the hopper 10 and the second discharge port 26 for quantitatively discharging the supplied improving material. It is provided at a position substantially opposed to the center. The lower surface of the upper plate 22 of the case 21 and the rotating body 4
The labyrinth portion 45 is formed by setting a small gap S with zero. An improved soil hopper 5 is disposed behind the hopper 10 and the powder supply device 20, and a belt conveyor 6 is disposed below the improved soil hopper 5 and the powder supply device 20. The improved soil from the improved soil hopper 5 and the improved material from the powder supply device 20 are transported into the mixing device 4 at a predetermined mixing ratio. An improved soil transport device 7 is provided from below the mixing device 4 to the front, and a power unit 8 is provided in front of the mixing device 4 and above the improved soil transport device 7. Note that the lower traveling body 2 may be a wheel type.

Next, the operation will be described. The soil to be improved is conveyed from the soil hopper 5 to be improved by the belt conveyor 6, and the improved material stored in the hopper 10 is supplied thereon by the powder supply device 20 by a predetermined amount and conveyed into the mixing device 4. . The soil to be improved and the improving material are mixed by the mixing device 4 to produce improved soil, and the improved soil is carried out from the front of the vehicle body by the improved soil transport device 7.

Since the self-propelled soil improvement machine 1 is equipped with the hopper 10 and the powder supply device 20 for the soil improvement material according to the present invention, the accuracy of the supply amount of the improvement material is high as described above.
A predetermined amount of the improving material is always evenly supplied on the soil to be improved. Therefore, it is possible to stably produce a high-quality improved soil. Further, since the power required for driving the powder supply device 20 is small, the power device 8 can be reduced in size, and the self-propelled soil improvement machine 1 having good performance and compactness can be configured.

As described above, the present invention has the following effects. Periodic vibration is applied to the powder by a thin plate rotatably provided at the bottom of the hopper, so that the powder above the discharge port from the hopper to the outside (supply port to the powder supply device, etc.) Can be prevented from being formed, and the amount of powder discharged from the discharge port can be quantified. Thereby, the accuracy of the powder supply amount from the powder supply device can be improved. Since the tip of the plate is thin and sharp, and has a shape that is inclined forward in the rotation direction, compaction of the powder at the outer peripheral portion of the hopper can be prevented, and rotation resistance can be reduced.

A predetermined space is provided between the upper surface of the rotating body of the powder supply device provided below the lower plate below the hopper (integral with the upper plate of the case containing the powder supply device) and the lower plate. Since the labyrinth part having the narrow gap is provided, the passage resistance of the powder such as the improving material can be increased. In addition, the supply port to the powder supply device provided on the lower plate and the discharge port from the powder supply device provided on the case bottom plate are located on opposite sides with respect to the rotation center of the rotating body. The distance becomes longer and the resistance of the powder passing from the supply port to the discharge port increases.
As a result, even when the powder is fed into the hopper by air pressure, the powder does not exceed the specified amount and is discharged from the discharge port, and the accuracy of the powder supply amount from the powder supply device can be improved.

The discharge port of the powder from the powder supply device is formed such that the normal line of the edge on the upstream side of the rotating body faces the center of the belt conveyor below the discharge port in the rotation direction. Since the powder is supplied uniformly and reliably over the entire width of the belt conveyor without spilling from the belt conveyor, the accuracy of the supply amount can be improved. The powder supply port to the powder supply device is formed so as to be inclined in the rotation direction from the inside to the outside of the rotating body over a plurality of feeder blades. It is hard to be in a state, whereby the rotational resistance of the rotating body can be reduced.

In a self-propelled soil improvement machine equipped with the powder supply device configured as described above as an improvement material supply device, the supply amount of the improvement material is accurately supplied without variation. And the improving material can be stably and accurately maintained and mixed. Accordingly, it is possible to manufacture a high quality improved soil, and it is possible to reduce the manufacturing cost of the improved soil by eliminating the unnecessary use of the improving material.

[Brief description of the drawings]

FIG. 1 is a side sectional view of a powder supply device of the present invention.

FIG. 2 is a view as viewed in the direction of arrows AA in FIG. 1;

FIG. 3 is a view taken in the direction of arrows BB in FIG. 1;

FIG. 4 is a view taken in the direction of arrows CC in FIG. 2;

FIG. 5 is a view as seen in the direction of the arrows D in FIG. 3;

FIG. 6 is a view as seen from the direction of arrows EE in FIG. 3;

FIG. 7 is a view on arrow FF of FIG. 3;

FIG. 8 is a side view of the hopper.

FIG. 9 is a plan view of the hopper.

FIG. 10 is a side view of a self-propelled soil improvement machine equipped with the powder supply device of the present invention.

FIG. 11 is a side view of a conventional powder supply device.

FIG. 12 is a view taken in the direction of arrows GG in FIG. 11;

[Explanation of symbols]

1. Self-propelled soil improvement machine 2. Lower traveling body 3. Body 4
... Mixing device, 5 ... Improved soil hopper, 6 ... Belt conveyor, 10 ... Hopper, 11 ... Cylinder member, 12 ... Bottom plate, 1
3 ... first discharge port, 20 ... powder supply device, 21 ... case, 22 ... top plate, 23 ... bottom plate, 24 ... body plate, 25 ... supply port, 26 ... second discharge port, 27 ... edge, 31: ground plate, 40: rotating body, 41: outer member, 42: inner member, 43
... feeder blade, 45 ... labyrinth part, 50 ... plate,
60: cleaning device, 61a, 61b, 61c: air nozzle.

Claims (11)

[Claims] 1. A first hopper (10) for supplying powder is provided at a lower portion thereof.
A lower plate (12) having a discharge port (13) is provided, and a first discharge port is provided.
A plate (4 mm to 20 mm thick (5
0) is provided rotatably. 2. The powder supply device according to claim 1, wherein
A powder supply device, wherein the plate (50) disposed substantially horizontally has a width at a distal end portion smaller than a width at a base end portion in plan view. 3. The powder supply device according to claim 1, wherein the plate (50) arranged substantially horizontally has a tip end inclined in the rotation direction in plan view. . 4. A top plate (22), a bottom plate (23), and an upper plate (2)
2) and a case (21) formed by a body plate (24) provided between the bottom plate (23), an inner member (42) in the case (21), and an attachment to the inner member (42). And a rotating body (40) including a plurality of feeder blades (43), and a rotating body (40) provided on the upper plate (22).
Supply port (25) for powder to the bottom plate, and a second discharge port in the bottom plate.
In the powder supply device (20) provided with (26), the second discharge port is (26), and the belt conveyor (6) arranged below the second discharge port (26) is connected to the belt conveyor (6). 6) is provided over almost the entire width, and the shape of the edge (27) on the upstream side of the second discharge port (26) is such that the normal of the edge (27) is oriented in the rotation direction of the rotating body (40). , A powder feeder formed so as to face the center line of the belt conveyor (6). 5. A hopper (10), an upper plate (22) and a bottom plate (23) provided below the hopper (10), and provided between the upper plate (22) and the bottom plate (23). Case (2) formed by body plate (24)
1), inside the case (21), an inner member (42), and the inner member (42).
And a rotating body (40) having a plurality of feeder blades (43) attached to the upper plate (22), and a supply port (25) for powder to the rotating body (40) provided on the upper plate (22). In the powder supply device (20) provided with the second discharge port (26) in the bottom plate, the supply port (25)
The rotating member (4) is provided over a plurality of feeder blades (43) and extends outward from the inner member (42) side.
0) A powder supply device formed to be inclined in the rotation direction. 6. A hopper (10), an upper plate (22) and a bottom plate (23) provided below the hopper (10), and provided between the upper plate (22) and the bottom plate (23). Case (2) formed by body plate (24)
1), inside the case (21), an inner member (42), and the inner member (42).
And a rotating body (40) having a plurality of feeder blades (43) attached to the upper plate (22), and a supply port (25) for powder to the rotating body (40) provided on the upper plate (22). The second outlet (2
In the powder supply device (20) provided with 6), the supply port (25)
A plate (5) disposed substantially horizontally above the upper plate (22) having
0) is provided rotatably, the supply port (25) and the second discharge port (2
And 6) are disposed substantially opposite to each other with respect to the rotation center of the rotating body (40). 7. A hopper (10), an upper plate (22) and a bottom plate (23) provided below the hopper (10), and provided between the upper plate (22) and the bottom plate (23). Case (2) formed by body plate (24)
1), inside the case (21), an inner member (42), and the inner member (42).
And a rotating body (40) having a plurality of feeder blades (43) attached to the upper plate (22), and a supply port (25) for powder to the rotating body (40) provided on the upper plate (22). The second outlet (2
In the powder supply device (20) provided with 6), the rotating body (40)
A powder supply device, wherein a labyrinth (45) is formed by bringing an upper surface of the first plate and a lower surface of the upper plate (22) close to each other. 8. The powder supply device according to claim 6, wherein a supply port (25) to the rotating body (40) is provided over a plurality of feeder blades (43), and the rotation port is connected to the rotating body. A powder supply device characterized in that the powder supply device is formed so as to be inclined from the inner member (42) of the body (40) outward in the rotation direction of the rotating body (40). 9. The powder supply device according to claim 6, wherein an inside of the rotating body (40), a gap between an upper surface of the rotating body (40) and a lower surface of the upper plate (22), and the case are provided. Cleaning device (60) for cleaning at least one of the inner peripheral surfaces of (21)
A powder supply device comprising: An improved soil hopper (5), a hopper (10) for soil improvement material, and a lower part of the hopper (10) attached to a vehicle body (3) having a lower traveling body (2). Top plate (22) and bottom plate (23)
And a body plate (2) provided between the upper plate (22) and the bottom plate (23).
4) and a case (21) formed by, in the case (21),
A rotating body (40) including an inner member (42) and a plurality of feeder blades (43) attached to the inner member (42) is provided, and the upper plate (22) is rotated from a hopper (10). A supply port (25) of the improving material to the body (40) is provided, a second discharge port (26) is provided in the bottom plate (23), and the rotating body (40) is rotated to supply the material from the supply port (25). A powder feeder (20) for moving the received improving material and discharging the improving material by a predetermined amount from the second discharge port (26), and a soil hopper to be improved.
In a self-propelled soil conditioner (1) provided with a mixing device (4) for improving the soil by mixing the soil from (5) and the improving material from the powder supply device (20), the hopper (10 ), Supply port (2
A plate (50) arranged substantially horizontally above an upper plate (22) having 5)
Rotatably provided, the supply port of the powder supply device (20)
(25) The self-propelled soil improvement machine characterized in that the (25) and the second discharge port (26) are arranged substantially opposite to each other with respect to the rotation center of the rotating body (40). 11. The self-propelled soil improvement device according to claim 10, wherein an upper surface of a rotating body (40) of the powder supply device (20);
A self-propelled soil improvement machine, wherein a labyrinth (45) is formed by bringing the lower surface of the upper plate (22) close to the lower surface.