JP3274841B2 - Spreading device for solidification material for ground improvement - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to ground improvement, which is a type of civil engineering work, and is suitable for spraying a powdery solidified material such as cement mixed with soft ground of a foundation ground with stirring. The present invention relates to an apparatus for dispersing a solidifying material for ground improvement.

[0002]

2. Description of the Related Art Conventionally, a solidifying material such as cement is forcibly mixed with soft ground of a foundation ground in the ground,
There is a ground improvement for forming a solidified mixed soil such as a columnar shape, a wall shape, and a block shape. In order to stir and mix the solidified material and the soft soil, a well-known mixing device equipped with a stirrer is used. Prior to the stirring and mixing, a required amount of solidified material is sprayed on the ground to be improved. Here, when scattering the solidified material, it is necessary to pay attention to the scattering of the powder. In particular, careful attention is needed at construction sites adjacent to houses. It is also important that the solidified material be accurately and uniformly spread over a large number of areas in a required amount in consideration of the mixing ratio with the soft soil. For this purpose, a spraying device dedicated to the solidifying material is used.

[0003] As this type of spraying apparatus, there is a spraying apparatus including a measuring box (spraying box) disclosed in Japanese Patent Application Laid-Open No. 9-304155 filed by the present applicant. As shown in FIG. 18, the spraying device includes a backhoe 41 and a spray box 43 attached to a tip of an arm 42 or the like. The scatter box 43 is a hollow shape with only the bottom open. The spray box 43 includes a cyclone 44 for discharging a powdery solidifying material such as cement therein, and a spray box 4.
Dust collector 45 for collecting powder soaring in 3
And a viewing window 47 provided on the side surface of the scatter box 43 and closed with a transparent plate 46. According to this spraying device, the spray box 43 is installed on the ground by operating the arm 42 and the like of the backhoe 41, and the inside of the box 43 is sealed. In this state, by discharging the solidified material from the cyclone 44, the spray box 4
Spread the solidified material on the ground within the range of 3. At this time, since the solidified material is sprayed in the scattering box 43, the solidified material does not fly outside the box 43, and the solidified material is not lost. Further, the solidified material discharged into the spray box 43 can be seen through the viewing window 47 from the outside, so that the amount of the solidified material sprayed can be easily adjusted.

[0004]

However, in the above-mentioned conventional spraying device, as shown in FIG. 18, the spraying box 43 is connected to the tip of the arm 42 via a plurality of connecting members 48 projecting from the side wall thereof. , Link mechanism 50 of bucket cylinder 48
Is directly connected as an attachment equivalent to a bucket. As is well known, the arm 42 is connected to a boom 51 and is connected to an arm cylinder 52 provided on the boom 51. When the arm cylinder 52 is driven, the inclination of the arm 42 with respect to the boom 51 is changed. When the bucket cylinder 48 is driven, the inclination of the spray box 43 with respect to the arm 42 is changed. Here, by appropriately driving the two cylinders 48 and 52, respectively, the arm 42 and the spray box 4
3 is moved, and the scatter box 43 is moved up and down, or the inclination of the scatter box 43 is changed.

Therefore, depending on the movement of the arm 42 and the scatter box 43, for example, when the arm 42 is to be drawn to the boom 51, the scatter box 43 connected to the tip of the arm 42 or the like is moved by the link mechanism 50 or the bucket cylinder. There is a possibility of interference with the spray box 48, which limits the freedom of movement of the spray box 43. For this reason, when the ground improvement is performed in a complicated section shape, in order to freely move the spray box 43 according to the shape, the backhoe 4
1 itself has to be frequently moved back and forth, left and right, and there is a possibility that work loss may be increased. In addition, since the scatter box 43 is directly connected to the arm 42 and the link mechanism 50, when the bucket is previously attached to the arm 42 or the like, the bucket is removed every time the scatter box 43 is attached to the arm 42 or the like. Must be done, and the work becomes cumbersome.

The present invention has been made in view of the above circumstances, and an object of the present invention is to increase the degree of freedom of movement of a spray box in a device having a spray box provided on an arm of a backhoe, An object of the present invention is to provide an apparatus for dispersing a solidifying material for ground improvement, which makes it possible to simplify the operation of mounting a box.

[0007]

In order to achieve the above object, the present invention according to claim 1 is provided on an arm of a backhoe, is surrounded by an upper wall and a side wall, is open at a bottom side, and has an upper wall and a side wall. A hollow spray box provided with a ventilation hole in at least one of the above, a solidifying material discharging means for discharging powdery solidifying material used for ground improvement into the spray box, and A dust collector for collecting the powder that is discharged and soars is provided, and a spray box is placed on the ground, and the solidified material discharged from the solidified material discharging means is sprayed on the ground from the opening on the bottom side. In the spraying device, when the spraying box is placed on the ground near the tip of the arm and at the side of the arm and attached to the arm via the connecting means,
Then, pierce the ground and create a gap between the ground and the lower edge of the spray box.
It is intended to provide a sealing member for sealing .

[0008] According to the above configuration, the spray box is installed on the ground by operating the arm of the backhoe, and the inside of the spray box is sealed. In this state, the solidified material is discharged onto the ground within the range of the spray box by discharging the solidified material into the spray box by the solidified material discharging means. At this time, a part of the air in the spray box is replaced by the solidified material and discharged to the outside through the ventilation hole. Here, since the solidified material is sprayed in the spray box, the solidified material does not scatter outside the spray box,
There is no loss of solidified material. Further, since the powder soared in the spray box is collected by the dust collector, the scattering of the powder in the spray box is quickly calmed down. Therefore, when the scatter box is to be moved to the next place, the powder does not scatter outside from the opening on the bottom side of the scatter box. To move the spray box to an arbitrary position, an arm or the like is driven. Here, spraying boxes a vicinity of the distal end of the arm
Since it is attached to the arm via the connecting means arranged on the side of the arm, the arm and the like and the spray box do not interfere with each other no matter how the arm is moved. Therefore,
The movement of the arm is not restricted by the spray box.
When the spray box is placed on the ground, the sealing member
The gap between the ground and the lower edge of the spray box is sealed.
Will be. Therefore, the solidified material was discharged into the spray box.
Sometimes, the powder of solidified material is sprayed together with air in the spray box.
Spouting from the lower edge is suppressed.

In order to achieve the above object, according to a second aspect of the present invention, in the configuration of the first aspect, the sealing member is configured to move the spray box placed on the ground in a horizontal direction. It is intended to function as a rake.

According to the above construction, in addition to the effect of the first aspect of the invention, by moving the spray box placed on the ground in the horizontal direction, the sealing member functions as a rake and is sprayed on the ground. Acts on the solidified material, and the solidified material is leveled.
Further, the sealing member functions as a rake and acts on the ground before and after the improvement, and the ground is leveled.

According to a third aspect of the present invention, in accordance with the first or second aspect of the present invention, the solidified material discharging means includes a cyclone arranged in a spray box. , The cyclone includes a discharge port that opens downward to discharge the solidified material, and the discharge port includes:
It is intended that diffusion means for diffusing the discharged solidified material in the spray box is provided.

According to the above construction, claim 1 or claim
In addition to the effect of the second aspect, when the solidified material is discharged from the discharge port of the cyclone, the solidified material is diffused in the spray box by the diffusion means. Therefore, the kinetic energy given to the solidified material at the time of discharge from the discharge port is reduced.

According to a fourth aspect of the present invention, there is provided the invention according to one of the first to third aspects of the present invention, wherein a part of the powder toward the dust collector is placed in the spray box. In order to collect in advance, it is intended to provide an air release sheet that restricts the passage of powder and allows the passage of air.

[0014] According to the above configuration, claims 1 to claim
In addition to the effect of the third aspect of the invention, the powder soaring in the spray box is collected by the dust collector, and a part of the powder going to the dust collector is collected in advance by the air release sheet. Become. Therefore, the amount of powder collected by the dust collector in one application is reduced.

According to a fifth aspect of the present invention, in order to achieve the above object, in the structure of one of the first to fourth aspects, the side wall of the spray box is covered with a transparent plate whose inside can be seen through. The purpose is to provide a broken viewing window.

[0016] According to the above configuration, claims 1 to claim
In addition to the effect of the invention of the fourth aspect , since the viewing window closed by the transparent plate is provided on the side wall of the spray box, the solidified material discharged and sprayed into the spray box can be externally passed through the viewing window. It becomes more transparent.

According to a sixth aspect of the present invention, in order to achieve the above object, a scale for measuring a solidified material to be sprayed is provided on a side wall of the spray box in the configuration of the fifth invention. The purpose is.

According to the above construction, in addition to the effect of the fifth aspect of the invention, the solidified material seen through the viewing window can be calibrated by the scale. Therefore, it is possible to confirm the excess or deficiency of the amount of the solidified material to be sprayed on the scale.

According to a seventh aspect of the present invention, in accordance with the first aspect of the present invention, the solidifying material discharging means includes a cyclone arranged in a spray box,
The cyclone includes a discharge port that opens downward to discharge the solidified material, and an opening / closing lid that allows the discharge port to be closed is provided in order to restrict the excess solidified material from overflowing from the discharge port. It is intended.

According to the above configuration, in addition to the operation of the first aspect, the following operation is performed. That is, when the discharge of the solidified material from the discharge port of the cyclone is to be stopped, there is a possibility that an excessive solidified material may overflow from the discharge port due to the residual pressure in the cyclone. According to the configuration of the present invention, when the discharge of the solidified material from the discharge port is to be stopped,
When the operator operates the opening / closing lid from the outside of the spray box to close the discharge port, overflow of excess solidified material from the discharge port is restricted. Further, the solidified material accumulated by closing the discharge port can be used at a spraying position where the solidified material is sprayed next.

[0021]

BEST MODE FOR CARRYING OUT THE INVENTION [First Embodiment] Hereinafter, a first embodiment of a device for spreading a solidifying material for ground improvement according to the present invention will be described in detail with reference to the drawings.

FIG. 1 shows a schematic configuration of a spraying apparatus according to the present embodiment. The spraying device includes a well-known backhoe 1, a scattering box 3 provided on an arm 2 of the backhoe 1, a cyclone 4 provided on the scattering box 3, and a dust collector 5 provided on the backhoe 1.

FIG. 2 is a sectional view of the scatter box 3, FIG. 3 is a plan view of the scatter box 3, and FIG. 4 is a bottom view of the scatter box 3. The scatter box 3 having a rectangular parallelepiped shape includes an upper wall 3a and a side wall 3
It has a hollow shape surrounded by b, and only its bottom side is open to have an opening 3c. Vent holes 6, 7 are provided in the upper wall 3a and the side wall 3b.

The cyclone 4 fixed to the upper wall 3a is for discharging a powdery solidifying material such as cement used for ground improvement into the spray box 3. The lower part of the cyclone 4 is arranged in the spray box 3, and a lower end thereof is provided with a discharge port 4a that opens downward to discharge the solidified material. The cyclone 4 is provided with a hose joint 8 including a suction port 8a. As shown in FIG.
Is connected to a hose 10 extending from a lorry 9.
Then, the powdered solidified material stored in the tank 11 of the lorry 9 is pressure-fed into the cyclone 4 through the hose 10 and the hose joint 8 together with air. The cyclone 4 imparts swirling motion to the powder of the solidified material fed therein, and separates the powder from air by centrifugal force acting on the powder. The separated powder, that is, the solidified material is discharged into the spray box 3 from the discharge port 4a.

The discharge port 4a is provided with a diffusion plate 12 constituting a diffusion means of the present invention for diffusing the discharged solidified material in the spray box 3. 7 and 8 show the diffusion plate 12.
1 shows a front view and a plan view, respectively. Metal diffusion plate 12
Has a substantially quadrangular pyramid shape, and its tip is fixed to a peripheral wall of the discharge port 4a by a fixture (not shown).

The dust collector 5 is for collecting powder that is discharged into the spray box 3 and soars. As shown in FIG. 1, a hose-shaped duct 13 extending from the dust collector 5 is
It is connected to a dust collection port 14 (see FIG. 2) opened on the side wall of the spray box 3. Therefore, by operating the dust collector 5, the powder soared in the spray box 3 is sucked and collected by the dust collector 5 through the dust collection port 14 and the duct 13. The powder collected by the dust collector 5 is transferred to the spray box 3 again for reuse.

The spray box 3 is placed on the ground with the bottom opening 3c facing down. In this state, the solidified material discharged from the discharge port 4a of the cyclone 4 is sprayed on the ground from the opening 3c. As shown in FIGS.
On the lower four sides, a continuous ridge 15 projecting downward as a sealing member of the present invention and a flange 16 projecting in the horizontal direction are provided. The ridge 15 is used to seal a gap between the ground and the lower edge of the scatter box 3 when the scatter box 3 is placed on the ground. The ridge 15 is
By moving the spray box 3 placed on the ground in the horizontal direction, it also functions as a rake. The flange 16 holds the ridge 15 when the spray box 3 is placed on the ground.
Is to confirm that a predetermined amount has penetrated the ground, and also to increase the contact area of the spray box 3 with the ground.

As shown in FIG. 2, the air release sheet 17 is placed inside the spray box 3 so as to surround the cyclone 4.
Is provided. The air release sheet 17 is for previously collecting a part of the powder sucked toward the dust collector 5. The air release sheet 17 is formed of one or a plurality of layers of cloth, and has a mesh that restricts the passage of powder and allows the passage of air. 5 and 6 show an enlarged example of the shape of the sheet 17 and its mesh 17a. In addition, the ventilation holes 6 and 7 are provided with the air release sheet 17.
Is closed by.

On one side wall 3b of the scatter box 3, an observation window 19 whose inside is closed by a transparent plate 18 which can be seen through is provided. The transparent plate 18 is formed of glass or a transparent member on which a clear film or the like is pasted, and is removable as necessary. On the side wall 3b provided with the viewing window 19, a scale 20 for measuring the solidified material to be sprayed is provided. FIG.
As shown in the figure, this scale 20 is made of a plurality of lines drawn in parallel with the side wall 3b in the horizontal direction.
The application amounts of 00 kg, 750 kg, and 1000 kg are displayed.

In the spraying apparatus, the spraying box 3 configured as described above is arranged near the tip of the arm 2 of the backhoe 1 and beside the arm 2, and as shown in FIGS. It is attached to a bucket 21 previously mounted on the arm 2. At the lower end of the bracket 22 attached to the upper part of the scatter box 3, a lateral shake preventing device 23 for preventing the lateral movement of the scatter box 3 is provided. A stay 24 protruding laterally is provided on one side wall 3b of the scatter box 3. The scatter box 3 is attached to the bucket 21 by applying a stay 24 to a lower surface of the bucket 21 and connecting the anti-sway device 23 to a side wall of the bucket 21. In this embodiment, the bucket 21, the anti-sway device 23, and the bracket 22 constitute the connecting means of the present invention.

Here, as is well known, the arm 2 is connected to a boom 25 provided on the backhoe 1, and is connected to an arm cylinder 26 provided on the boom 25.
The boom 25 is moved up and down by a boom cylinder 27. When the arm cylinder 26 is driven, the inclination of the arm 2 with respect to the boom 25 is changed. Arm 2
The bucket cylinder 28 provided in the
Is connected to the bucket 21. When the bucket cylinder 28 is driven, the inclination of the bucket 21 with respect to the arm 2 is changed. Here, by appropriately driving each of the three cylinders 26 to 28, the boom 25, the arm 2, and the bucket 21 are respectively moved, and the spray box 3 is moved up and down together with the bucket 21, and the inclination of the spray box 3 is reduced. be changed.

Next, the mode of use of the spraying device configured as described above will be described. The spraying of the solidified material using this spraying device is performed by forcibly mixing and mixing the solidified material with the soft soil of the foundation ground in the ground, so that the solidified pillar-shaped, wall-shaped and block-shaped mixed treated soil can be dispersed. It is performed as part of the ground improvement to be formed. Prior to agitating and mixing the solidified material and the soft soil, the spraying device is used to spray a required amount of the solidified material on the ground to be improved.

That is, in order to spray the solidified material using this spraying device, the arm 2 of the backhoe 1 and the boom 25
By operating the like, as shown in FIG. 1, the scatter box 3 is placed on the ground with the opening 3c downward, and the inside of the scatter box 3 is sealed. At this time, for example, as shown in FIG.
It is arranged at the center of one small section 30 previously divided into a plurality of rectangular sections. The small section 30 is set to be larger than the plane area of the scatter box 3. Therefore, in order to spray the solidified material over the entire area of the small section 30, the spray box 3 is moved in the horizontal direction. In this state, the solidified material pumped from the tank 11 of the lorry 9 is discharged to the discharge port 4a of the cyclone 4.
From the spray box 3, the solidified material is sprayed on the ground within the range of the spray box 3. At this time, part of the air in the spray box 3 is replaced by the solidified material, and the air holes 6,
7 is discharged to the outside through the air release sheet 17. Since the solidified material powder is collected by the sheet 17,
There is no leakage to the outside through the ventilation holes 6 and 7. Here, since the solidified material is sprayed in the spray box 3, the solidified material does not scatter outside the spray box 3 and the solidified material is not lost. Further, the powder soared in the spray box 3 is collected by the air release sheet 17 and the dust collector 5, so that the scattering of the powder in the spray box 3 is quickly calmed down. Therefore, when the scatter box 3 is lifted from the ground to move to the next place, that is, the next small section 30, the powder of the solidified material does not scatter to the outside from the opening 3c of the scatter box 3. For this reason, it is possible to prevent the occurrence of dust pollution due to the scattering of the powder, and it is possible to prevent the loss of scattering of the solidified material. This effect is particularly effective at construction sites adjacent to houses.

Since the spraying apparatus has several other features, it has several functions and effects not found in the conventional spraying apparatus. That is, according to this spraying device, when the spraying box 3 is placed on the ground,
A continuous ridge 15 provided at the lower edge of the box pierces the ground, the lower edge of the spray box 3 is sealed with the ground, and the gap between them is eliminated. Therefore, when the solidified material is discharged into the spray box 3, the powder of the solidified material, together with the air in the spray box 3, tends to squirt from between the lower edge of the box 3 and the ground. Effectively suppressed. For this reason, it is possible to prevent the powder of the solidified material from leaking from the lower edge of the spray box 3 at the time of spraying the solidified material, and in that sense, to more surely prevent the generation of dust pollution due to the scattering of the powder. Can be prevented. In addition, in this spraying device, since the flange 16 is provided on the lower edge of the spray box 3, by confirming that the flange 16 is in contact with the ground, the ridge 15 penetrates the ground by a predetermined amount. You can be sure that. The contact area of the spray box 3 with the ground is increased by the flange 16. For this reason, the powder in the spray box 3 hardly leaks to the outside, the scattering of the powder to the outside can be suppressed, and the occurrence of dust pollution can be more reliably prevented.

According to the spraying apparatus, when the solidified material is discharged from the discharge port 4a of the cyclone 4, the solidified material is diffused in the spray box 3 by the diffusion plate 12. Therefore,
The kinetic energy given to the solidified material when the solidified material is discharged from the discharge port 4a is reduced. As a result, it is possible to suppress the powder from rising when the solidified material falls to the ground.

According to this spraying device, the side wall 3 of the spray box 3
Since the viewing window 19 closed with the transparent plate 18 is provided in b, the solidified material sprayed in the spray box 3 can be seen through the viewing window 19 from the outside. Therefore, whether or not the solidified material is sprayed in the spray box 3 can be confirmed through the viewing window 19. In addition, in this spraying device, the solidified material seen through the viewing window 19 can be weighed by the scale 20 provided on the side wall 3b. Therefore, it is possible to check with the scale 20 whether the amount of the solidified material to be sprayed through the viewing window 19 is excessive or insufficient. As a result, the amount of the solidified material to be sprayed in the spray box 3 can be appropriately adjusted as needed, and the required amount of the solidified material can be accurately sprayed. Furthermore, in this spraying device,
Since the rise of the powder is suppressed by the diffusion plate 12 as described above, it is possible to calibrate the amount of sprayed material immediately after discharging the solidified material, and in that sense, the efficiency of the work of spraying the solidified material is improved. Can be improved.

According to this spraying device, the powder soaring in the dust box 3 is collected by the dust collector 5, and a part of the powder going to the dust collector 5 is stored in the dust box 3. The air is collected in advance by the provided air release sheet 17. Therefore, the amount of powder collected by the dust collector 5 in one application is reduced. As a result, the accumulation rate of the powder in the dust collector 5 can be reduced, and as a result, the dust collecting capability of the dust collector 5 can be maintained at a high level for a long time.

As shown in FIG. 9, the spray box 3 is once disposed in the center of the small section 30, and after the required amount of the solidified material is sprayed as described above, the solidified material is spread over the entire area of the small section 30. Needs to be expanded. For this purpose, after the solidified material is once discharged into the spray box 3, the spray box 3 is slightly lifted by moving the arm 2 or the like of the backhoe 1 and moved horizontally on the ground, so that the spread area of the solidified material is spread. Is expanded. At this time, the ridge 15 provided on the lower edge of the spray box 3 functions as a rake and acts on the ground, so that the solidified material on the ground is leveled. For this reason, the work for spreading the solidified material can be performed more smoothly, and in that sense, the work efficiency of the whole spraying work can be improved. In addition, the ridges 15 function as rakes and act on the ground before and after the improvement, and the ground is leveled.

By the way, at the time of spraying the solidified material,
As described above, it is necessary to move the scatter box 3 in the small section 30 or between different small sections 30. Therefore, the arm 2 of the backhoe 1 and the boom 25
Moving the spray box 3 up and down or tilting the spray box 3. Here, in the above-mentioned conventional spraying device, depending on the movement of the arm 42 and the spray box 43, the spray box 43 connected to the tip of the arm 42 or the like is connected to the link mechanism 50.
And there is a possibility of interference with the bucket cylinder 48, which limits the degree of freedom of movement of the spray box 43. Therefore, the backhoe 41 itself must be frequently moved in order to freely move the scatter box 43 in accordance with the complicated section shape, and the work loss tends to increase. However, in the spraying device of this embodiment,
The scatter box 3 is disposed near the tip of the arm 2 and the bucket 2
Since it is attached to the arm 2 via 2 etc.,
No matter how the arm 2 is moved, the arm 2 and the like and the spray box 3 do not interfere with each other. Therefore, the movement of the arm 2 is not restricted by the spray box 3. As a result,
The degree of freedom of movement of the scatter box 3 can be increased. That is, the spray box 3 can be freely moved only by moving the arm 2 and the boom 25 without frequently moving the backhoe 1 back and forth and left and right, and in this sense, the work of spraying the solidified material. Efficiency can be increased. In the conventional spraying apparatus, the spraying box 43 is used.
Is directly connected to the arm 42 and the link mechanism 50, and when a bucket is attached to the arm 42 or the like, the bucket has to be removed in order to attach the scattering box 43 to the arm 42 or the like. . However, in the spraying device of this embodiment, the spray box 3 is mounted on the arm 2 by being mounted on the bucket 21. For this reason, it is not necessary to remove the bucket 21 each time the scatter box 3 is mounted, and the work of mounting the scatter box 3 can be simplified. When the work by the bucket 21 is restarted, the work by the bucket 21 can be performed immediately by simply removing the spray box 3 from the bucket 21 after spraying the solidified material.

[Second Embodiment] Next, a second embodiment which embodies the apparatus for dispersing the solidifying material for ground improvement of the present invention will be described with reference to the drawings. In each of the following embodiments including this embodiment, the first
The same members as those of the embodiment are denoted by the same reference numerals, and description thereof will be omitted. Therefore, each of the following embodiments will be described focusing on points different from the first embodiment.

FIGS. 10 and 12 show cross-sectional views of the scatter box 3, and FIGS. 11 and 13 show bottom views of the scatter box 3 corresponding to FIGS. 10 and 12 (with the diffusion plate 12 removed). State is shown). In this embodiment, cyclone 4
The first embodiment is different from the first embodiment in that an opening / closing device having an opening / closing lid 31 capable of closing the discharge port 4a is provided on the side wall 3b of the spray box 3.

In dispersing the solidified material on the ground surface using the spray box 3, the solidified material required for the area of the small section 30 was introduced into the spray box 3 from the discharge port 4 a of the cyclone 4. At this time, the feed of the solidified material from the lorry 9 is stopped. However, even if the feeding of the solidified material from the lorry 9 is stopped, the solidified material and the residual pressure remain in the hose 10 and the cyclone 4, so that the supply of the solidified material near the discharge port 4 a is stopped. It takes a little time, and there is a possibility that excess solidified material exceeding the required amount overflows from the discharge port 4a and is put into the spray box 3. Therefore, in this embodiment, in order to prevent the excess solidified material from overflowing from the discharge port 4a, an opening / closing device having an opening / closing lid 31 capable of closing the discharge port 4a is provided in the spray box 3. This opening / closing lid 3
Reference numeral 1 denotes a discharge port 4a that can be closed by an operation from outside the spray box 3. That is, the opening / closing lid 31 is
a is a disk shape slightly larger than the outer diameter of
An operation rod 32 extending in the horizontal direction is attached to 1. The operating rod 32 extends out of the scatter box 3 through the side wall 3b, and a handle 33 is provided at one end thereof. The opening / closing lid 31 and the operation rod 32 are supported slidably in a horizontal direction with respect to a guide frame (not shown). In this embodiment, interference between the opening / closing lid 31 and the diffusion plate 12 is avoided by devising the arrangement of the fixtures of the diffusion plate 12.

Therefore, before the solidifying material is put into the spray box 3, the operator pulls the handle 33 so that FIG.
As shown at 0 and 11, the opening / closing lid 31 is arranged at a retreat position where the discharge port 4a is opened. In this state, by operating the lorry 9 and the cyclone 4, the solidified material is discharged from the discharge port 4 a and is put into the spray box 3. At this time, the worker observes the amount of the solidified material charged through the viewing window 19, but when the pressure feed from the lorry 9 is stopped and the discharge of the solidified material from the discharge port 4a is about to be stopped. When the operator pushes the handle 33 as necessary, the opening / closing lid 31 is disposed at the closing position for closing the discharge port 4a as shown in FIGS. This allows
The overflow of the excess solidified material from the discharge port 4a is restricted.
As a result, a required amount of the solidified material can be accurately charged and sprayed into the spray box 3. Further, the solidified material accumulated by closing the discharge port 4a can be used at a location where the solidified material is to be sprayed next.

[Third Embodiment] Next, a third embodiment of the present invention will be described with reference to the drawings.

FIGS. 14 and 16 are cross-sectional views of the scattering box 3, and FIGS. 15 and 17 are bottom views of the scattering box 3 corresponding to FIGS. 14 and 16 (however, the diffusion plate 12 is removed). State is shown). This embodiment is different from the second embodiment in that the opening / closing lid 34 is of a two-part type.

That is, the two-part opening / closing lid 34 is
a, and has a disk shape as a whole slightly larger than the outer diameter of the discharge port 4a. As shown in FIG. 15, the respective divided pieces 34a of the opening / closing lid 34 are provided so as to be movable in the horizontal direction with respect to the pivot point. An operation rod 32 extending in the horizontal direction is attached to this rotation fulcrum.
A handle 33 is provided at one end of the operation rod 32 penetrating through “b”. The opening / closing lid 34 is supported by a support shaft (not shown) around a pivot point, and the operation rod 32 is supported slidably in a horizontal direction with respect to a guide frame (not shown). In this embodiment, interference between the opening / closing lid 34 and the diffusion plate 12 is avoided by devising the arrangement of the fixture for the diffusion plate 12.

Therefore, before the solidifying material is put into the spray box 3, the operator pushes the handle 33 so that each of the divided pieces 34a of the opening / closing lid 34 as shown in FIGS.
Are opened with each other to open the discharge port 4a. In this state,
By operating the lorry 9 and cyclone 4,
The solidified material is discharged from the discharge port 4a and is put into the spray box 3. At this time, the worker observes the amount of the solidified material charged through the viewing window 19, but when the pressure feed from the lorry 9 is stopped and the discharge of the solidified material from the discharge port 4a is about to be stopped. When the operator pulls out the handle 33 as necessary, the divided pieces 34a of the opening / closing lid 34 are closed to each other and the discharge port 4a is closed as shown in FIGS. Thereby, the overflow of the excessive solidified material from the discharge port 4a is restricted. As a result, a required amount of the solidified material can be accurately charged and sprayed into the spray box 3. Further, the solidified material accumulated by closing the discharge port 4a can be used at a location where the solidified material is to be sprayed next.

It should be noted that the present invention is not limited to the above-described embodiments, and may be carried out as follows without departing from the spirit of the invention.

(1) In each of the above embodiments, the spray box 3 is attached to the arm 2 via the bucket 21. On the other hand, when the attachment previously attached to the tip of the arm 2 is a tool other than the bucket 21, the scatter box 3 may be attached to the arm 2 via another tool.

(2) In each of the above embodiments, the spray box 3 is arranged near the tip of the arm 2 and beside the arm 2 and is attached to the arm 2 via the bucket 21. On the other hand, the spray box may be disposed near, at the top of the arm, above, below, or in front of the arm and attached to the arm via the bucket 21.

(3) In each of the above embodiments, the ridge 15 is provided as a sealing means on the lower edge of the spray box 3, but any member having a function similar to the ridge 15 other than the ridge 15 may be used. May be provided. Alternatively, a sealing means such as the ridge 15 can be omitted from the lower edge of the spray box 3.

(4) In each of the above embodiments, the diffusion plate 12 having a quadrangular pyramid shape is provided as the diffusing means at the discharge port 4a of the cyclone 4. However, the present invention is not limited to the quadrangular pyramid shape. A diffusion plate having a shape may be provided, and a member other than the diffusion plate 12 may be provided as long as the member has a function similar to that of the diffusion plate 12. Alternatively, a diffusion unit such as the diffusion plate 12 may be omitted from the discharge port 4a.

(5) In each of the above embodiments, the air release sheet 17 is provided in the spray box 3. However, if the member has a function similar to the air release sheet 17, a member other than the air release sheet 17 may be provided. Can also. Alternatively, the air release sheet 17 can be omitted from the spray box 3.

(6) In each of the above embodiments, the viewing window 19 closed by the transparent plate 18 is provided on the side wall 3b of the spray box 3.
These can be omitted. If possible by design
The entire spray box may be made of a transparent synthetic resin. In this way, even if the viewing window 19 is omitted, the inside of the spray box can be seen through.

(7) In each of the above-described embodiments, the scale 20 is provided on the side wall 3b of the spray box 3 in accordance with the viewing window 19. However, the scale 20 may be provided outside the side wall 3b or inside. Is also good. Alternatively, this scale can be omitted.

(8) In each of the above embodiments, the cyclone 4 is provided as the solidified material discharging means for discharging the solidified material into the spray box 3, but any device having a function similar to the cyclone 4 may be used. Equipment other than the cyclone 4 can be provided.

(9) In each of the above embodiments, the discharge port 4a
The opening / closing lid 31 and the two-part split opening / closing lid 34 are slightly larger than the discharge port 4a, but if the discharge port can be closed, a triangle, a quadrangle, a polygon, each cone, each column, etc. It may be shaped.

Further, since the above-described embodiments include the following inventions in addition to the inventions described in the claims, the inventions are described below together with the effects.

(A) provided on the arm of the backhoe,
A hollow dispersion box having a bottom side opened by being surrounded by an upper wall and a side wall, and having a ventilation hole provided in at least one of the upper wall and the side wall; A solidifying material discharging means for discharging the solidifying material, and a dust collector for collecting powder which is discharged into the spraying box and soars, and the spraying box is placed on the ground, In a spraying device configured to spray the solidified material discharged from a discharging unit onto the ground from the opening on the bottom side, when the spraying box is placed on the ground, the ground is stabbed on the ground and the ground is spread. An apparatus for dispersing a solidifying material for ground improvement, comprising a sealing member for sealing a gap with a lower edge of a box.

According to the invention (a), when the solidified material is discharged into the spray box, the powder of the solidified material is ejected together with the air in the spray box from between the lower edge of the box and the ground. However, this is effectively suppressed. Therefore, when the solidified material is sprayed, the powder of the solidified material can be prevented from leaking from the lower edge of the spray box, and in that sense, the occurrence of dust pollution due to the scattering of the powder can be more reliably prevented. can do.

(B) provided on the arm of the backhoe,
A hollow dispersion box having a bottom side opened by being surrounded by an upper wall and a side wall, and having a ventilation hole provided in at least one of the upper wall and the side wall; A solidifying material discharging means for discharging the solidifying material, and a dust collector for collecting powder which is discharged into the spraying box and soars, and the spraying box is placed on the ground, In a spraying device configured to spray the solidified material discharged from the discharging unit onto the ground from the opening on the bottom side, the solidified material discharging unit includes a cyclone arranged in the spray box, wherein the cyclone is A discharge port that opens downward to discharge the solidified material, wherein the discharge port is provided with diffusion means for diffusing the discharged solidified material in the spray box. Of solidifying material for soil improvement.

According to the present invention (b), when the solidified material is discharged from the discharge port of the cyclone, the solidified material is diffused in the spray box by the diffusion means. Therefore, the kinetic energy given to the solidified material when the solidified material is discharged from the discharge port is reduced. As a result, it is possible to suppress the powder from rising when the solidified material falls to the ground.

(C) provided on the arm of the backhoe,
A hollow dispersion box having a bottom side opened by being surrounded by an upper wall and a side wall, and having a ventilation hole provided in at least one of the upper wall and the side wall; A solidifying material discharging means for discharging the solidifying material, and a dust collector for collecting powder which is discharged into the spraying box and soars, and the spraying box is placed on the ground, In a spraying device that sprays the solidified material discharged from the discharging means on the ground from the opening on the bottom side, in the spraying box, in order to previously collect a part of the powder toward the dust collector. And an air release sheet for restricting the passage of the powder and permitting the passage of air.

According to the invention (c), the powder soaring in the dust box is collected by the dust collector, and a part of the powder going to the dust collector is provided in the dust box. The air will be collected in advance by the air release sheet. Therefore, the amount of powder collected by the dust collector in one application is reduced. As a result, the accumulation rate of the powder in the dust collector can be reduced, and as a result, the dust collecting ability of the dust collector can be maintained at a high level for a long time.

[0065]

According to the first aspect of the present invention,
In an apparatus provided with a spray box provided on an arm of a backhoe, the spray box may be located near the tip of the arm and at the end of the arm.
It is arranged on the side and is attached to the arm via connecting means. Therefore, no matter how the arm is moved, the arm and the like and the scatter box do not interfere with each other, and the movement of the arm is not restricted by the scatter box. As a result, the degree of freedom of movement of the scatter box can be increased, and the effect of simplifying the mounting operation of the scatter box can be achieved. Also, according to the configuration of the invention described in claim 1,
A sealing member is provided on the lower edge of the cloth box. Therefore, the sealing member
Penetrates the ground and seals the gap between the ground and the lower edge of the spray box.
And the solidified material was discharged into the spray box.
Sometimes the powder of the solidified material blows out from the lower edge of the box with air.
Is suppressed. As a result, the powder of solidified material
Prevents leakage from the edge and prevents dust
The effect that the occurrence of harm can be more reliably prevented
Demonstrate.

According to the second aspect of the present invention, in the first aspect of the present invention, the sealing member functions as a rake. Therefore, in addition to the operation and effect of the invention of claim 1, by moving the spray box placed on the ground in the horizontal direction, the sealing member functions as a rake and acts on the ground, and the spraying is performed on the ground. The solidified material is leveled. For this reason, the operation for spreading the solidified material can be smoothly performed, and the effect of improving the efficiency of the entire operation can be exhibited.

According to a third aspect of the present invention, in the first or second aspect of the present invention, the solidified material discharge means is provided with a discharge port which opens downward to discharge the solidified material. With a cyclone containing
Diffusion means for diffusing the solidified material is provided. Therefore, in addition to the function and effect of the invention of claim 1 or claim 2 , when the solidified material is discharged from the discharge port, the solidified material is diffused by the diffusion means and given to the solidified material at the time of discharge. Kinetic energy is reduced. As a result, it is possible to prevent the powder from rising when the solidified material falls to the ground.

[0068] According to the configuration of the invention according to claim 4, in the configuration of one invention of claims 1 to 3, in spraying boxes to regulate the passage of the powder to permit the passage of air An air release sheet is provided. Therefore, in addition to the function and effect of the invention of claims 1 to 3 , a part of the powder is previously collected by the air release sheet in the spray box, so that the dust is collected by the dust collector in one spray. The amount of collected powder is reduced. As a result, the accumulation rate of the powder in the dust collector can be reduced, and the dust collecting ability of the dust collector can be maintained at a high level for a long time.

[0069] According to the configuration of the invention according to claim 5, in the configuration of one invention of claims 1 to 4, the side walls of the spray box, inside is blocked by the see-through transparent plate Prying Windows are provided. Therefore, in addition to the function and effect of the invention of claims 1 to 4 , the solidified material sprayed in the spray box can be seen through the viewing window from the outside. For this reason, the effect that the presence or absence of the dispersion of the solidified material in the dispersion box can be confirmed through the viewing window is exhibited.

According to the structure of the invention described in claim 6 , in the structure of the invention of claim 5 , a scale for measuring the solidified material is provided on the side wall of the spray box. Therefore, in addition to the function and effect of the invention of claim 6, it is possible to confirm the excess or deficiency of the amount of the solidified material to be sprayed on the scale. As a result, the amount of the solidified material to be sprayed in the spray box can be appropriately adjusted, and the required amount of the solidified material can be accurately sprayed.

According to a seventh aspect of the present invention, in the first aspect of the present invention, the solidified material discharging means is constituted by a cyclone including a discharge port that opens downward to discharge the solidified material. In order to prevent the excess solidification material from overflowing from the discharge port, an opening / closing lid is provided so that the discharge port can be closed. Therefore, in addition to the function and effect of the invention of claim 1, when the discharge of the solidified material from the discharge port is to be stopped, the operator operates the opening / closing lid from outside the spray box to close the discharge port. Thereby, the overflow of the excess solidified material from the discharge port is regulated. As a result, an effect that a required amount of the solidified material can be accurately introduced and sprayed into the spray box is exhibited. Further, the solidified material accumulated by closing the discharge port can be used at a spraying position where the solidified material is sprayed next.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram showing a spraying device according to an embodiment.

FIG. 2 is also a cross-sectional view showing a scatter box.

FIG. 3 is a plan view showing a scatter box.

FIG. 4 is a bottom view showing the scatter box.

FIG. 5 is an enlarged plan view showing the air release sheet and the mesh thereof.

FIG. 6 is an enlarged plan view showing the shape of the air vent sheet and its mesh.

FIG. 7 is a front view showing the spray plate.

FIG. 8 is a plan view showing the spray plate.

FIG. 9 is a plan view showing the arrangement of the scatter boxes in a small section for ground improvement.

FIG. 10 is a sectional view showing a scatter box according to the second embodiment.

FIG. 11 is a bottom view showing the scatter box.

FIG. 12 is a sectional view showing a scatter box.

FIG. 13 is a bottom view showing the scatter box.

FIG. 14 is a cross-sectional view showing a scatter box according to the third embodiment.

FIG. 15 is a bottom view showing the scatter box.

FIG. 16 is a cross-sectional view showing a scatter box.

FIG. 17 is also a bottom view showing the scatter box.

FIG. 18 is a schematic configuration diagram showing a conventional spraying device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Backhoe 2 Arm 3 Scattering box 3a Upper wall 3b Sidewall 3c Opening 4 Cyclone 4a Discharge port 5 Dust collector 6 Vent hole 7 Vent hole 9 Roller wheel (4, 9 constitute solidified material discharge means) 12 Diffusion plate (Diffusion means) 15 ridges (sealing means) 17 air release sheet 18 transparent plate 19 viewing window 20 scale 21 bucket 22 bracket 23 anti-sway device (21 to 23 constitute connecting means) 31 opening / closing lid 34 opening / closing lid

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-9-304155 (JP, A) JP-A-8-311861 (JP, A) JP-A-3-76029 (JP, U) (58) Survey Field (Int.Cl. ⁷ , DB name) E02D 3/12 103 G01F 11/00 G01F 19/00

Claims (7)

(57) [Claims] A hollow spray box provided on an arm of a backhoe, surrounded by an upper wall and a side wall, and having a bottom side opened, and a ventilation hole provided in at least one of the upper wall and the side wall; A solidifying material discharging means for discharging a powdery solidifying material used for ground improvement in a box, and a dust collector for collecting powder that is discharged and fluttered into the spray box, Place the scatter box on the ground,
In the spraying apparatus, the solidified material discharged from the solidified material discharging means is sprayed on the ground from the opening on the bottom side .
And is attached to the arm via connecting means, and when the spray box is placed on the ground,
Seal the gap between the ground and the lower edge of the spray box.
An apparatus for dispersing a solidifying material for ground improvement, comprising a sealing member configured as described above . 2. The spraying apparatus according to claim 1 , wherein the sealing member functions as a rake by moving the spraying box placed on the ground in a horizontal direction. Spreading device for solidifying material for ground improvement. 3. A spraying device according to claim 1 or claim 2, wherein the solidifying material discharge means includes a arranged a cyclone in said spraying box, the cyclone is to eject the solidified material Spreading of the solidification material for ground improvement, comprising: a discharge port that opens downward, wherein the discharge port is provided with diffusion means for diffusing the discharged solidified material in the spray box. apparatus. 4. A spraying device according to one of claims 1 to 3, in said spray box, in order to advance collecting a portion of the powder towards the dust collector, of the powder An apparatus for dispersing a solidifying material for ground improvement, comprising an air release sheet for restricting passage and allowing air to pass. 5. A spraying device according to 4 claim 1 to claim, in the side wall of the spray box, characterized in that a viewport whose inside is blocked by the see-through transparent plate Spreading equipment for solidifying material for ground improvement. 6. The spraying device according to claim 5 , wherein a scale for measuring the sprayed solidified material is provided on a side wall of the spraying box. . 7. The spraying apparatus according to claim 1, wherein the solidified material discharging means includes a cyclone disposed in the spray box, wherein the cyclone is directed downward to discharge the solidified material. Including a discharge port that opens, in order to restrict the excess solidified material from overflowing from the discharge port,
An apparatus for dispersing a solidifying material for ground improvement, comprising an opening / closing lid capable of closing the discharge port.