JP5284674B2 - Powder spreader - Google Patents

Description

  The present invention relates to a powder spraying apparatus used when powder such as a stabilizer is sprayed on a road surface, for example, in pavement work.

Conventionally, the stabilization method used for road paving works is to improve the bearing capacity by mixing and solidifying stabilizers (improving materials) such as cement and lime into the roadbed soil to obtain the strength and durability of the roadbed. I am letting. As the construction method, for example, a powder dispersion car as disclosed in Patent Document 1 is used, and a stabilizer is dispersed with a constant thickness thickness while running the vehicle. It is common to improve the surface ground by mixing with earth and sand.
In Patent Document 1, a belt conveyor is provided on a vehicle body provided with a crawler type traveling body, and a powder tank having an opening at the bottom is disposed on the belt conveyor. A structure is disclosed in which a discharge duct is attached, and the powder conveyed from the belt conveyor is dropped in the discharge duct and scattered on the road surface while the vehicle is running.
Utility Model Registration No. 2557619

However, the conventional stable processing method has the following problems.
In other words, the powder spreading vehicle of Patent Document 1 has a structure in which the powder in the powder tank is directly dropped onto the road surface from the belt conveyor through the discharge duct. In other words, the powder fall height is determined by the position of the rear end of the belt located above the belt conveyor, that is, the crawler type traveling unit, the upper body thereof, and further mounted on the body via a gantry or the like. It becomes the position of the height which match | combined each height dimension with the belt conveyor made. Therefore, there has been a problem that a large amount of dust is generated when the powder discharged from the belt conveyor is landed on the road surface or before it is landed.
In Patent Document 1, the powder is allowed to pass through the discharge duct. However, since it is a method of spraying while moving the vehicle, the vehicle moves forward immediately after the powder is sprinkled on the road surface. In addition, the dust generated at the time of spraying continued to float around the sprayed powder for a while, and the dust could not be suppressed, leaving room for improvement in that respect. .

  The present invention has been made in view of the above-described problems, and an object thereof is to provide a powder spraying device that can suppress the generation of dust.

In order to achieve the above object, in the powder spraying device according to the present invention, a powder storage tank is mounted on a traveling vehicle, and a discharge portion having an opening / closing mechanism is provided in the storage tank, and powder is discharged from the discharge portion. A powder spraying device that discharges and sprays on a road surface, and lays a canvas that forms an air layer at a predetermined interval between the bottom surface of the storage tank and the bottom surface of the storage tank to the air layer. A discharge mechanism that ejects compressed air and supplies compressed air into the storage tank through the canvas, and a rear end of the storage tank that receives the powder discharged from the storage tank and opens at the lower end It has a hopper with a spray port close to the road surface, and a rotary discharge device that is provided inside the lower end of the hopper and sprays the powder in the hopper from the spray port to the road surface. Yes.

  In the present invention, the powder in the hopper is received from the spraying port by driving the rotary discharge device provided inside the lower end of the hopper while receiving the powder in the storage tank with the hopper and running the traveling vehicle. Scattered on the road surface. The fall height of the powder sprayed from the hopper at this time coincides with the height discharged from the rotary discharge device, and this rotary discharge device is at a position inside the lower end portion of the hopper close to the road surface, Since the powder is sprinkled on the road surface immediately after falling from the rotary discharge device, it is difficult for dust to stand up and generation of dust can be suppressed. And since it spreads by a rotary discharge device at a position close to the road surface, there is no problem that powder is scattered in the air in the middle of dropping and variations in the amount of dispersion occur, and a uniform thickness can be secured.

In the powder spraying apparatus according to the present invention, it is preferable that the storage tank is provided with a discharge mechanism that positively discharges the powder inside thereof from the discharge unit.
In the present invention, the powder can be reliably supplied to the hopper even when the remaining amount in the storage tank is reduced as compared with the case where the powder is naturally discharged by its own weight in the storage tank.

In the powder spraying apparatus according to the present invention, the discharge mechanism preferably has a configuration in which compressed air is supplied from the bottom surface of the storage tank into the storage tank and the compressed air and powder are mixed.
In the present invention, since the powder is fluidized by mixing the compressed air and the powder supplied into the storage tank, the powder can be smoothly discharged from the discharge portion.

In the powder spraying device according to the present invention, one end of the storage tank is disposed in the storage tank, the other end is disposed on the inlet of the hopper, and the compressed air is distributed to the discharge port side of the other end. It is preferable that a pressure feed pipe for transferring the powder is provided.
In the present invention, the compressed air is mixed in the storage tank so that the powder in the storage tank has fluidity, and further, the powder in the storage tank is sucked in by the pressure feed pipe that gives the flow to the discharge port side by the compressed air. Since it can be pumped to the hopper side with a function, the powder can be reliably supplied into the hopper.

Moreover, in the powder spraying apparatus according to the present invention, it is preferable that a scattering prevention cover for covering a region between the discharge portion and the hopper is provided.
In the present invention, it is possible to prevent dust from scattering when powder is discharged from the discharge portion of the storage tank to the hopper.

According to the powder spraying device of the present invention, by spraying the powder on the road surface by rotating discharge device which is arranged at a position close to the road surface at the lower portion inside the ho Tsu path, on the vehicle body as in the prior art, Alternatively, it is possible to drop and spray powder from a lower position than when dropping powder from a discharge port provided in the storage tank on the vehicle body, thus reducing the amount of dust generated during spraying. be able to.
In the powder spraying device of the present invention, compressed air is accumulated in the air layer by ejecting compressed air from the bottom surface, and further, the compressed air is ejected from the fabric of the canvas. As a result, the compressed air ejected into the storage tank flows over the entire area of the storage tank, so that the stabilizing material does not partially stay in the storage tank, and the internal tank can be reliably stabilized without tilting. The material can be discharged, and the amount of dust generated when the stabilizing material is dispersed can be suppressed.

Hereinafter, a powder spraying apparatus according to a first embodiment of the present invention will be described with reference to FIGS. 1 and 2.
FIG. 1 is a partially broken side view showing an outline of a stabilizing material spraying apparatus according to a first embodiment of the present invention, and FIG. 2 is a view of the stabilizing material spraying apparatus shown in FIG.

  1 and 2, the stabilizer 1 (powder spreader) according to the first embodiment is used when cement or pavement is used when the target ground is a soft ground with a small supporting force. Stable treatment material such as lime (hereinafter referred to as “stabilizer N (powder)”) is sprayed on the road surface, and then the stabilizer N and soil that have been sprayed using a construction machine such as a stabilizer are mixed and supported on the ground. It is an apparatus that is used in the stabilization treatment method that gives power, and is used for spraying the stabilizer N.

The stabilizer 1 (1A) is a device in which a storage tank 6 for a stabilizer N is mounted on a vehicle 2 (traveling vehicle), and the stabilizer N is discharged from the rear end of the storage tank 6 and sprayed onto a road surface G. It is.
The vehicle 2 includes a vehicle main body 3, a crawler type traveling unit 4 provided below the vehicle main body 3, a cab 5 provided at the front of the vehicle main body 3, and a storage tank mounted at the rear part of the vehicle main body 3. 6. In the following description, the front side in the front-rear direction (traveling direction) of the vehicle 2 is defined as “front end”, and the rear side is defined as “rear end”.

  The storage tank 6 is supplied with a stabilizing material N from a supply port (not shown), and is provided with three discharge ports 6a, 6a, 6a (discharge portions) at a position at the lower end of the rear end. It can be discharged. The storage tank 6 has a structure that can be tilted by rotating the front side up and down (in the direction of arrow E) around the lower end of the rear end. It tilts stepwise and the maximum tilt angle is 25 degrees.

  Further, the stabilizing material spraying apparatus 1A is provided with an opening / closing mechanism 11 for opening and closing each of the discharge ports 6a of the storage tank 6 and a rear end portion of the storage tank 6, and is stably discharged from the discharge port 6a. The material N is received from the charging port 12a, and the spraying port 12d whose lower end is opened is disposed near the road surface G. The hopper 12 is provided on the inner side 12c of the lower end of the hopper 12. The amount of the stabilizer N supplied from the storage tank 6 into the hopper 12 in conjunction with the rotary feeder 13 (rotary discharge device) for spraying on the road surface G from the spray port 12d and the amount of powder in the hopper 12. And a supply amount adjusting mechanism 14 for adjusting.

  The opening / closing mechanism 11 includes an opening / closing gate 11a for opening / closing the discharge port 6a of the storage tank 6, and an expansion / contraction driving portion 11b having a cylinder tip fixed to the opening / closing gate 11a. In the opening / closing mechanism 11, the expansion / contraction drive unit 11 b is connected to a drive control unit 17, which will be described later. ) Has been adjusted.

  The hopper 12 has an input port 12a disposed at a position where the stabilizer N discharged from the discharge port 6a can be received, and is fixed to the storage tank 6 via a cover body 19 for preventing scattering. In the present embodiment, the lower end portion of the hopper 12 (the position of the spraying port 12d) can suppress the fall height of the stabilizing material N to the lowest, and the distance from the road surface G is set. It is located at a height that is a thickness dimension (in FIGS. 1 and 2, a gap is provided between the stabilizing material N sprayed for easy viewing and the spraying port 12 d of the hopper 12). . Furthermore, as shown in FIG. 2, the specific shape of the hopper 12 is a hem-expanding shape in which the width dimension gradually increases from the input port 12a toward the spray port 12d as seen from the rear of the vehicle 2, In the side view shown in FIG. 1, the thickness of the opening of the insertion port 12 a (in the front-rear direction) is increased. In addition, the length dimension of each part, such as the shape of the hopper 12, and the width dimension of the spout 12d, can be arbitrarily set.

  Although not particularly shown, the hopper 12 can be supported by a fixing member from the vehicle body 3 or the like. The cover body 19 has one end fixed to the storage tank 6 and the other end fixed to the input port 12 a of the hopper 12 so as to cover the passage of the stabilizer N discharged from the discharge port 6 a of the storage tank 6. ing. The cover body 19 is formed of a bellows-like member that can be expanded and contracted, can be deformed in accordance with the inclined position of the storage tank 6, and dust generated when the stabilizer N is discharged from the discharge port 6 a to the hopper 12. It is designed to prevent scattering.

  The rotary feeder 13 has a known structure having an accommodating portion partitioned by a plurality of blades around the rotation axis, and the rotation axis is arranged in the width direction of the vehicle 2 (the left-right direction in FIG. 2) on the inner side 12c of the lower end portion of the hopper 12. Alternatively, it is disposed along the traveling direction (front-rear direction) of the vehicle 2) and is provided so as to be rotatable about the rotation axis. As described above, the rotary feeder 13 provided in the hopper 12 is supplied with the stabilizer N in the accommodating portion positioned above, and the stabilizer N in the accommodating portion falls downward when the accommodating portion moves downward by rotation. It has a structure to do. The rotary feeder 13 can adjust the application amount of the stabilizing material N by changing the rotation speed.

  In addition, a plurality of guides for guiding the stabilizer N supplied from the storage tank 6 in the hopper 12 so as to be supplied in a uniform amount in the width direction of the hopper 12 (direction orthogonal to the front-rear direction of the vehicle 2). Plates 20, 20,... Are arranged. As a result, the stabilizer N can be supplied in a uniform amount in the axial direction to the rotary feeder 13 extending in the width direction, and the thickness of the stabilizer N spread on the road surface G is kept constant. can do.

  The supply amount adjusting mechanism 14 will be described later with a level sensor 15 (15A, 15B) for detecting the amount of the stabilizing material N in the hopper 12 and powder amount information T obtained by detection with the level sensors 15A, 15B. Based on the information of the output unit 16 output to the drive control unit 17 and the tank inclination control unit 18, the drive control unit 17 for controlling the opening / closing mechanism 11 based on the powder amount information T, and the information of the output unit 16. And a tank inclination control unit 18 for controlling the inclination angle of the storage tank 6.

As shown in FIG. 1, the level sensor 15 includes an upper level sensor 15A that detects the upper limit position of the stabilizer N in the hopper 12 and a lower level sensor 15B that also detects the lower limit position. The upper level sensor 15 </ b> A is disposed at a predetermined position below the charging port 12 a of the hopper 12, and the lower level sensor 15 </ b> B is disposed at a position above the rotary feeder 13. In the present embodiment, as shown in FIG. 2, since the discharge ports 6a, 6a, 6a are arranged at three locations in the width direction of the vehicle 2, so as to correspond to the positions of the respective discharge ports 6a, Three combinations of a pair of upper and lower level sensors 15A and 15B are arranged at a predetermined interval in the width direction. Three output units 16 are also provided corresponding to each of the three sets of level sensors 15.
The level sensor 15 continues to transmit an ON signal to the output unit 16 when the stable material N exists in the detection range and detects the stable material N, and outputs an OFF signal when the stable material N is not detected. It continues to transmit to the output unit 16.

  The supply amount adjusting mechanism 14 obtains the powder amount information T from the on / off signals of the level sensors 15A and 15B, and controls the opening / closing mechanism 11 of the storage tank 6 based on the powder amount information T to open / close the gate 11a. The stabilizer N can be supplied into the hopper 12 without excess or deficiency.

  When the drive control unit 17 receives the powder amount information T in the hopper 12 detected by the level sensor 15 from the output unit 16, the drive control unit 17 drives each cylinder of each expansion / contraction drive unit 11b to expand / contract, thereby opening / closing the open / close gate 11a. To control. That is, when the drive control unit 17 receives a signal from the level sensor 15 indicating that the amount of the stabilizing material N in the hopper 12 has decreased from the lower limit position from the output unit 16, the drive control unit 17 opens the open / close gate 11a. When the signal indicating that the stabilizer N has accumulated in the hopper 12 to the upper limit position is received from the output unit 16, the open / close gate 11a is closed and stabilized. Control to stop the discharge of the material N is performed.

  The tank inclination control unit 18 is connected to the output unit 16, and a predetermined amount of the stabilizing material N is accumulated in the hopper 12 after a predetermined set time has elapsed from the start of discharging the stabilizing material N discharged from the storage tank 6. If not (that is, if the upper level sensor 15A does not become an ON signal), it is determined that the amount of the stabilizing material N discharged from the storage tank 6 is not an appropriate amount, and is tilted so that the storage tank 6 is tilted. The apparatus (not shown) is configured to be controlled. Then, the stabilizing material N can be reliably supplied into the hopper 12 by discharging the stabilizing material N from the housing tank 6 by the inclination of the housing tank 6. The tilt control of the storage tank 6 at this time is a method in which the storage tank 6 is tilted stepwise by 5 degrees. Here, in FIG. 1, the tank inclination control unit 18 is provided in the cab 5, but is not limited to this installation position.

Next, the operation of the stabilizing material spraying apparatus 1 according to the first embodiment will be specifically described with reference to the drawings.
As shown in FIG. 1 and FIG. 2, in the present stabilizing material spraying apparatus 1 </ b> A, the stabilizing material N in the storage tank 6 is received by the hopper 12 and is provided on the inner side 12 c of the lower end portion of the hopper 12 while the vehicle 2 is traveling. By rotating the rotary feeder 13, the stabilizing material N in the hopper 12 is sprayed on the road surface G from the spraying port 12 d. The falling height of the stabilizer N sprayed from the hopper 12 at this time coincides with the height discharged from the rotary feeder 13, and the position of the inner side 12 c of the lower end portion of the hopper 12 where the rotary feeder 13 is close to the road surface G. Since the stabilizer N is rubbed onto the road surface G immediately after falling from the rotary feeder 13, it is difficult for dust to stand up and generation of dust can be suppressed.
Further, since the rotary feeder 13 sprays at a position close to the road surface G, there is no problem that the stabilizing material N scatters in the air in the middle of the fall and the spray amount varies, and a uniform thickness can be secured. .

  And in this stabilizing material spraying apparatus 1A, when the supply amount adjusting mechanism 14 is provided, the stabilizing material N in the hopper 12 can be managed, and when the amount of the stabilizing material N becomes less than the set lower limit position. In addition, the stabilizer N can be supplied from the storage tank 6 so that the set upper limit position is reached. For this reason, it is possible to prevent the stabilizing material N from disappearing in the hopper 12, and it is possible to always spread with a constant thickness. In addition, since the stabilizer N is not excessively inserted into the hopper 12, it is possible to prevent a problem that the hopper 12 is clogged and a load is applied to the rotation of the rotary feeder 13, and a predetermined thickness is not secured.

  Further, when the stabilizing material N in the storage tank 6 is reduced, when the stabilizing material N is not discharged from the discharge port 6a of the storage tank 6 or when the discharge amount decreases, the tank inclination control unit 18 By tilting the storage tank 6, the stabilizing material N in the storage tank 6 can be discharged with fluidity.

  As described above, in the powder spraying apparatus according to the first embodiment, the hopper is managed while being controlled by the supply amount adjusting mechanism 14 so that the amount of the stabilizer N supplied from the storage tank 6 into the hopper 12 is stabilized. The stabilizer N is sprayed on the road surface G by the rotary feeder 13 arranged at a position close to the road surface G at the lower end portion 12c of the vehicle 12 so that the exhaust provided on the vehicle body or the storage tank on the vehicle body as in the conventional case. Since the stabilizer N can be dropped and sprayed from a lower position as compared with the case where the powder is dropped from the outlet and sprayed, the amount of dust generated during spraying can be suppressed.

  Next, other embodiments will be described with reference to the accompanying drawings. However, the same or similar members and parts as those of the above-described first embodiment are denoted by the same reference numerals, and description thereof is omitted. A configuration different from the embodiment will be described.

FIG. 3 is a partially broken side view showing an outline of the stabilizing material spraying apparatus according to the second embodiment, and FIG. 4 is a view of the stabilizing material spraying apparatus shown in FIG.
As shown in FIGS. 3 and 4, the stabilizer distribution device 1 (1 </ b> B) according to the second embodiment includes a screw feeder 21 (discharge mechanism) at the bottom of the storage tank 6, and the storage tank is provided with the screw feeder 21. The stabilizing material N in 6 is supplied into the hopper 12. That is, a screw feeder 21 in which a bottom opening 6b is formed on the rear end side of the bottom portion of the storage tank 6, the intake opening is communicated with the bottom opening 6b, and the rotation axis direction is disposed in the front-rear direction of the vehicle 2, Are arranged in the width direction of the vehicle 2. A discharge gate 22 (opening / closing mechanism) that can be opened and closed is provided on the lower surface side of the rear end portion (discharge end portion) of the screw feeder 21. The position of the discharge gate 22 is provided at a position directly above the input port 12 a of the hopper 12 and inside the cover body 19.

The storage tank 6 of the second embodiment is also provided so as to be able to incline in steps of, for example, 5 degrees, as in the first embodiment.
Here, the configurations and functions of the hopper 12, the rotary feeder 13, and the supply amount adjusting mechanism 14 are the same as those in the first embodiment described above, and thus detailed description thereof will be omitted.
The drive control unit 17 of the supply amount adjusting mechanism 14 controls opening / closing of the discharge gate 22 of the screw feeder 21 based on the signal of the powder amount information T output from the output unit 16. The rotation of the screw feeder 21 is interlocked with the discharge gate 22, and rotates when the discharge gate 22 is open, so that the stabilizing material N in the storage tank 6 is supplied to the hopper 12 and the discharge gate 22 is closed. The rotation is stopped at the time of. The rotational speed of the screw feeder 21 may be constant or variable depending on the opening amount of the discharge gate 22.

  In addition, the tilt control of the storage tank 6 is managed by the tank tilt control unit 18 in accordance with the supply time of the stabilizer N into the hopper 12 as in the first embodiment, and the screw feeder 21 is rotated to stabilize the stabilizer. If the first level sensor 15A does not turn on after a certain time from the start of N discharge, it is determined that the amount of the stabilizing material N discharged from the storage tank 6 is not an appropriate amount, and the storage tank 6 is tilted. It is the structure controlled by.

  In the second embodiment, the screw feeder 21 is driven to rotate, the stabilizer N in the storage tank 6 is discharged from the discharge gate 22, and the stabilizer N can be reliably supplied into the hopper 12. The same actions and effects as those of the first embodiment described above can be achieved, and the amount of dust generated when the stabilizer N is dispersed can be suppressed.

FIG. 5 is a partially broken side view showing an outline of the stabilizer distribution device according to the third embodiment, and FIG. 6 is a view of the stabilizer dispersion device shown in FIG.
As shown in FIG. 5 and FIG. 6, the stabilizer dispersing device 1 (1C) according to the third embodiment is
A canvas 23 is laid on the bottom surface 6c side of the storage tank 6 (see FIG. 1) of the stabilizer 1A of the first embodiment described above, and compressed air 29 is supplied into the storage tank 6 from the tank bottom surface 6c. The internal stabilizing material N has a structure having a discharge mechanism for providing fluidity.
Here, the configurations and functions of the hopper 12, the rotary feeder 13, and the supply amount adjusting mechanism 14 are the same as those in the first embodiment described above, and thus detailed description thereof will be omitted.

  Specifically, the stabilizing material spraying device 1C has an inclined surface that decreases from the front side toward the discharge port 6a on the rear side on the bottom surface 6c of the storage tank 6, and a state in which a predetermined interval is provided over the entire bottom surface 6c. The canvas 23 is laid. That is, an air layer 28 having a uniform thickness is formed between the bottom surface 6 c and the canvas 23. For the canvas 23, a well-known cloth material having a texture can be used. The stabilizer N in the storage tank 6 is stored on the canvas 23. In the third embodiment, the storage tank 6 is not provided with a tilt function, and the tank tilt control unit 18 (see FIG. 5) provided in the first and second embodiments constituting the supply amount adjusting mechanism 14. 1 and FIG. 3) are omitted.

  A plurality of jet outlets 24, 24,... Are provided on the bottom surface 6c of the storage tank 6, and these jet outlets 24 are connected to an air supply pipe 25 connected to an air compressor 26 via an electromagnetic valve 27. . The opening / closing gate 11 a that opens and closes the discharge port 6 a of the storage tank 6 is controlled by the drive control unit 17 based on an output signal (powder amount information T) from the output unit 16. The ejection of the compressed air 29 into the storage tank 6, that is, the driving of the air compressor 26 is configured to be interlocked with the open / close gate 11a.

  That is, in the stabilizer dispersing device 1C, the compressed air 29 is accumulated in the air layer 28 and further accumulated in the air layer 28 by ejecting the compressed air 29 from the ejection ports 24, 24,... The compressed air 29 is ejected from the fabric of the canvas 23. As a result, the stabilizer N in the storage tank 6 and the compressed air 29 are mixed to increase fluidity, and an inclined surface is formed in which the bottom surface 6c of the storage tank 6 is lowered toward the discharge port 6a and easily flows. Therefore, the discharge port 6a is opened, and at the same time, the stabilizer N can be smoothly discharged from the discharge port 6a into the hopper 12.

  In the third embodiment, since the compressed air 29 ejected into the storage tank 6 flows over the entire area of the storage tank 6, the stabilizer N does not partially stay in the storage tank 6, As in the first and second embodiments described above, the internal stabilizer N can be reliably discharged without tilting the storage tank 6, and the amount of dust generated when the stabilizer N is sprayed is suppressed. be able to.

FIG. 7 is a partially cutaway side view showing an outline of the stabilizing material spraying apparatus according to the fourth embodiment, and FIG. 8 is a view of the stabilizing material spraying apparatus shown in FIG.
As shown in FIGS. 7 and 8, the stabilizer distribution device 1 (1D) according to the fourth embodiment is a modified version of the third embodiment described above, and the storage tank 6 has a discharge port. 6a (see FIG. 5) is not provided, and instead, the storage tank 6 is provided with a pressure feeding pipe 30 (30A, 30B). Specifically, the shape of the bottom surface 6c of the storage tank 6 is formed with an inclined surface such that the intermediate portion 6d is lowest in the front-rear direction. The canvas 23 is laid on the bottom surface 6 c with a space, and an air layer 28 is formed between the bottom surface 6 c and the canvas 23.

  The pressure feeding pipes 30 (30A, 30B) are provided on both the left and right sides of the storage tank 6. One end (suction port 30a) is disposed in the storage tank 6 and the other end (discharge port 30b) is the storage tank. 6 is arranged so as to be located on the charging port 12a of the hopper 12 outside of the hopper 12. Here, the discharge port 30b of the pressure feeding tube 30 corresponds to a discharge portion of the present invention. And it is the structure which sends compressed air from the intermediate part (air supply port 30c) of the pressure feed pipe 30, and distribute | circulates the compressed air toward the discharge port 30b.

  In addition, an opening / closing valve 31 (opening / closing mechanism) that opens and closes the flow path in the pressure feeding tube 30 is provided on the downstream side (the discharge port 30b side) of the pressure feeding tube 30 from the air supply port 30c. ing. The opening / closing operation of the opening / closing valve 31 is controlled by the drive control unit 17 based on the output signal (powder amount information T) of the output unit 16. The ejection of the compressed air 29 into the storage tank 6, that is, the driving of the air compressor 26 is configured to interlock with the opening / closing valve 31.

  And the air supply pipe 25 connected to the air compressor 26 in the fourth embodiment is a first supply pipe connected to the jet port 24 on the lower surface 6c of the storage tank 6 as in the third embodiment described above. 25a and a second supply pipe 25b extending to the air supply port 30c of the pressure feed pipe 30.

  In the fourth embodiment, in addition to the action of mixing the compressed air in the storage tank 6 to make the stabilizer N in the storage tank 6 fluid, the flow to the discharge part side is further given by the compressed air. Since the pressure feeding pipe 30 has a function of sucking the stabilizing material N in the storage tank 6 and can be pumped to the hopper 12 side, the stabilizing material N can be reliably supplied into the hopper 12, and the first described above. As in the third to third embodiments, the amount of dust generated when the stabilizing material N is dispersed can be suppressed.

As mentioned above, although the 1st-4th embodiment of the powder spraying apparatus by this invention was described, this invention is not limited to said embodiment, It can change suitably in the range which does not deviate from the meaning. It is.
For example, in the first to fourth embodiments, the stabilizing material N such as cement or lime is used as the powder. However, the material is not limited to this material. For example, a powder such as fly ash or bentonite is used. It is also possible. Furthermore, as an application target of the powder spraying apparatus, in this embodiment, the stabilizing material processing method is used in the pavement work, but is not limited thereto.

Further, in the present embodiment, the position of the lower end portion (spraying port 12d) of the hopper 12 is set to a height at which the distance from the road surface G is set to a thickness dimension, but is limited to this height position. Absent. In short, it is only necessary that the spout 12d and the rotary feeder 13 are close to the road surface G.
The hopper 12 fixed to the vehicle main body 3 is loaded on a transport vehicle, for example, in order to transport the present stabilizer spraying device 1 itself, that is, the stabilizer spraying device 1 is climbed on the slope and loaded on the carrier vehicle. It is preferable to provide a mechanism capable of moving in the vertical direction so that the lower end of the hopper 12 does not contact the road surface when moving the hopper 12. For example, by placing a parallel link mechanism between the hopper 12 and the vehicle main body 3, the hopper 12 is placed above the height at the time of spraying when the hopper 12 and the road surface are in contact with each other as described above. It can be moved to a position.

Further, in the present embodiment, the level sensor 15 is provided at two locations above and below the hopper 12, but is not limited to this. For example, only the lower limit position of the amount of the stabilizer N accumulated in the hopper 12 is used. Alternatively, a level sensor 15 may be provided, and a control method may be used in which the stabilizing material N is supplied from the storage tank 6 into the hopper 12 for a certain period of time when a lower limit signal is detected.
Further, the shape, capacity, height on the vehicle body 3 and the like of the storage tank 6 can be arbitrarily set. The hopper 12 can also be shaped and dimensioned according to the position of the discharge portion of the storage tank 6.

  In this embodiment, the rotary feeder 13 is employed as the rotary discharge device provided in the lower end portion inside 12c of the hopper 12. However, for example, a screw type discharge mechanism or the like may be used. As an example of this screw type discharge mechanism, a casing extending along the width direction inside the lower end portion of the hopper, and a pair of screw feeders arranged in the direction of the rotation axis with a rotation axis arranged in the casing. A casing to which a structure having the above structure can be applied has an opening for supplying powder at the center of the upper part, and a spout is formed on the side surface extending in the axial direction of the casing. That is, the powder in the hopper is supplied from the opening to the axial central portion in the casing, and the powder is moved from the axial central portion to both ends by a pair of screw feeders, and is uniformly distributed throughout the casing. It is a structure that spreads and overflows the powder from the spray port and sprays it onto the road surface.

It is a partially broken side view which shows the outline | summary of the stabilizer distribution apparatus by the 1st Embodiment of this invention. It is the figure which looked at the stabilizer distribution apparatus shown in FIG. 1 from back. It is a partially broken side view which shows the outline | summary of the stabilizer distribution apparatus by the 2nd Embodiment of this invention. It is the figure which looked at the stabilizer distribution apparatus shown in FIG. 3 from back. It is a partially broken side view which shows the outline | summary of the stabilizer distribution apparatus by the 3rd Embodiment of this invention. It is the figure which looked at the stabilizer distribution apparatus shown in FIG. 5 from back. It is a partially broken side view which shows the outline | summary of the stabilizer distribution apparatus by the 4th Embodiment of this invention. It is the figure which looked at the stabilizer distribution apparatus shown in FIG. 7 from back.

Explanation of symbols

1 Stabilizer application device (powder application device)
2 Vehicle 6 Storage tank 6a Discharge port 6c Bottom surface 11 Opening / closing mechanism 11a Opening / closing gate 12 Hopper 12a Input port 12c Inner side of lower end 12d Sprinkling port 13 Rotary feeder (rotary discharge device)
14 Supply amount adjusting mechanism 15, 15A, 15B Level sensor 16 Output unit 17 Drive control unit 18 Tank tilt control unit 19 Cover body (scattering prevention cover)
21 Screw feeder (discharge mechanism)
22 Discharge gate (opening / closing mechanism)
23 Canvas 24 Spout 25 Air supply pipe 29 Compressed air 30 Pressure feed pipe 30b Discharge port (discharge part)
31 Open / close valve (open / close mechanism)
G road surface

Claims (4)

A powder spraying device that mounts a powder storage tank on a traveling vehicle, has a discharge part provided with an opening and closing mechanism in the storage tank, discharges powder from the discharge part, and sprays it on a road surface,
On the bottom side of the storage tank, a canvas that forms an air layer with a predetermined interval is laid, and compressed air is jetted from the bottom surface of the storage tank to the air layer through the canvas. A discharge mechanism for supplying compressed air into the storage tank;
A hopper provided at a rear end portion of the storage tank, receiving the powder discharged from the storage tank, and having a spray port having a lower end opened close to the road surface;
A rotary discharge device provided inside the lower end portion of the hopper, for spraying the powder in the hopper from the spray port to the road surface;
A powder spraying device characterized by comprising: The powder spraying device according to claim 1, wherein the storage tank is provided with a discharge mechanism that positively discharges the powder in the storage tank from the discharge unit. Said discharge mechanism supplies compressed air from the bottom of the holding tank into the receiving tank, Ri configuration der to mix and the compressed air and the powder,
One end of the storage tank is disposed in the storage tank, the other end is disposed on the inlet of the hopper, and the compressed air is circulated to the discharge port side of the other end. The powder spraying apparatus according to claim 2, wherein a pressure feeding pipe for transporting is provided . The powder spraying device according to any one of claims 1 to 3, wherein a scattering prevention cover is provided between the discharge unit and the hopper so as to cover a region therebetween.

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