JP2001279609A - Method of removing bituminous material spraying device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bituminous material spraying device capable of spraying bituminous material and washing the inside of a line after the spraying by an air pressure from one air tank produced by a vehicle engine as a drive source without using any hydraulic device. SOLUTION: A compressor is driven by a vehicle engine, and the compressed air is accumulated in an air tank and supplied from the air tank to a bituminous material tank. The bituminous material in the tank is passed through a pipe, and sprayed from a spray nozzle fitted to a spray pipe on a road surface. After spraying, compressed air is fed from the air tank to the pipe and the spray pipe to recover the bituminous material remaining in the pipes to the bituminous material tank and to wash clean the insides of the pipes. The spray nozzle is formed so as to wash clean the inside thereof by discharging the bituminous material to the outside by the compressed air.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a spraying apparatus which is mounted on a bitumen material spraying vehicle and sprays bituminous material such as asphalt emulsion on a road surface.

[0002]

2. Description of the Related Art As shown in FIGS. 19 and 20, a conventional apparatus for spraying bitumen material such as asphalt emulsion comprises an engine 51, a hydraulic pump 52, a bituminous material tank 53, a bituminous material scattering pump 54, and a pump 50. A spray tube provided with a drive hydraulic motor 55 and the like and having a number of spray nozzles 56 at the rear end of the spray truck 50.
57 is provided so as to be extendable and contractible in the width direction of the road surface. Then, a hydraulic motor 55 is driven by the engine 51 via a hydraulic pump 52, and the bitumen material spray pump 54 is operated by the drive to drive the bitumen material tank 53.
The inside bituminous material is supplied to a spraying pipe 57 through a pipe 56, and is sprayed from a spraying nozzle 56 to a road surface.

[0003] As a simple type of bituminous material dispersing apparatus, a hydraulic pump is driven by a traveling engine of a vehicle, a hydraulic motor for driving an air compressor is actuated by the pressurized oil, and compressed air from the air compressor is supplied to the bituminous material. There is also generally used an apparatus configured to press-fit the inside of a tank to pressurize the inside of the tank and discharge an amount of bituminous material corresponding to the applied pressure from the inside of the tank to a spraying tube for spraying.

[0004]

However, in the former bituminous material dispersing apparatus, the bituminous material dispersing pump 54, the hydraulic pump 52 for driving the dispersing pump 54, and the hydraulic motor
55. In addition, when auxiliary equipment such as hydraulic oil tanks and oil filters, and auxiliary equipment such as pipes are required, the structure becomes complicated and cost increases, as well as when it is difficult to arrange in a body where space is limited. And it cannot be adopted for a small spreader vehicle of 2 ton class or less. On the other hand, according to the latter bituminous material spraying apparatus, the bitumen material in the tank is supplied to the spraying pipe by the compressed air of the air compressor as compared to the former spraying apparatus using the bituminous material spraying pump. Therefore, the whole device can be simplified, but hydraulic equipment similar to the former spraying device is required,
There is a problem that operation and management become complicated and skill is required.

[0005] In recent years, along with downsizing of repair work on general roads and downsizing of paving work in urban areas, it can be mounted on 2-ton class trucks that can easily run on narrow roads and is easy to operate. There has been a demand for a bituminous material spraying device that can be operated in such a way that an air compressor is driven by using an auxiliary engine different from the vehicle engine. In this case, the operation and maintenance of the auxiliary engine together with the vehicle engine are performed. Management is required. For example, when the vehicle engine is a diesel engine and the auxiliary engine is a gasoline engine, it is necessary to prepare and inject fuel and engine oil respectively so as not to make a mistake. In addition, the auxiliary engine is driven together with the vehicle engine during pavement work, so that noise is further increased and the surrounding environment is deteriorated.

In addition, in a bituminous material spraying apparatus using air as a driving source, the air pressure at the time of spraying and at the time of cleaning the inside of a pipe after spraying is different, so that several pieces of air according to the intended use are used. At present, air tanks are mounted and installed on spray vehicles. In other words, the air pressure required to pressurize the inside of the bituminous material tank when spraying bituminous material is a low pressure of 0.1 to 0.18 MPa, which is necessary to discharge and clean the bituminous material remaining in the pipes after spraying. Air pressure is medium pressure
0.3 to 0.4 MPa. Furthermore, the air pressure for operating the actuators such as the spray nozzle opening / closing cylinder is
It must be done with a pressure of ~ 0.7 MPa.

Since several air tanks corresponding to each pressure are used to supply these different pressures as described above, a large installation space is required, and other equipments are arranged on the spreading vehicle. There is a problem that the space is limited and a great deal of labor and time are required for maintenance, inspection, and repair of the air tank.

The present invention has been made in view of the above-mentioned problems, and has as its object to use a hydraulic device such as a bitumen material spray pump, a hydraulic pump for driving the spray pump, and a hydraulic motor. Without using the vehicle engine as the drive source, the air pressure from one air tank
It is an object of the present invention to provide a bituminous material dispersing apparatus which can spray a bituminous material with a simple operation and wash the inside of a pipe after the spraying, and which can be adopted even in a 2-ton vehicle-type dispersing vehicle.

[0009]

According to one aspect of the present invention, there is provided a bituminous material dispersing apparatus according to the present invention, comprising: a bituminous material tank installed on a bituminous material dispersing vehicle; A spray pipe provided with a plurality of spray nozzles disposed at the rear end of the spreader is connected and communicated with a spray pipe provided with a bituminous material pumping pipe provided with a first switching valve comprising a three-way switching valve in the piping. In a bituminous material dispersing device in which the bituminous material return port of the spraying tube and the bituminous material tank are connected and communicated by a bituminous material return tube having a second switching valve, compressed air of an air compressor driven by a vehicle engine is supplied. The air tank is stored in an air tank through an air supply pipe, and the first to third air pipes are connected to and communicate with the air tank, and the first air pipe is used for operating a first switching valve of the spray pipe. Connected to Linda through the third switching valve,
On the other hand, the second air pipe and the air suction pipe communicating with the suction side of the air compressor are connected to an air inlet / outlet pipe communicating with the bitumen material tank via a fourth switching valve. And the third air pipe is connected to and communicated with the bituminous material pumping pipe via a first switching valve including the three-way switching valve.

[0010] In the bituminous material spraying apparatus,
According to the invention, an output shaft is freely connected to a counter gear in a meshing gear train of a transmission connected to a vehicle engine via a clutch mechanism, and the output shaft is connected to a drive shaft of an air compressor via a V-belt. The invention according to claim 3 is characterized in that the compressor is configured to decelerate and drive the compressor.
An unloader that rotates the air compressor without load when the air pressure in the air tank reaches a set pressure or more is interposed, and the exhaust pipe is connected and communicated.

Further, the invention according to claim 4 is characterized in that a regulator is interposed in the middle of the second air pipe from the air tank to the fourth switching valve and in the first air pipe. The invention according to claim 5, wherein a branch air pipe is connected to and communicates with the third air pipe, and the bituminous material communicates with the branch air pipe through a fifth switching valve formed of a three-way switching valve into a bituminous material tank. A supply / drain pipe and an intake / discharge hose provided with an on-off valve are connected and communicated with each other, and a bituminous material distributing bar is connected to a pipe portion between the fifth switching valve and the on-off valve in the intake / discharge hose via the on-off valve. Is connected.

[0012]

When the air compressor is driven by the vehicle engine, compressed air is stored in the air tank through the air supply pipe. To spray the bituminous material, the compressed air in the air tank is supplied to the first switching valve actuating cylinder comprising a three-way switching valve via a third switching valve through a first air pipe connected to and communicating with the air tank, By operating the cylinder, the first switching valve is opened to the side of the bituminous material tank and the spraying pipe so that the pressure feeding pipe between the bituminous material tank and the spraying pipe is connected. Simultaneously, when the fourth switching valve is operated to connect the second air pipe to the air inlet / outlet pipe, the compressed air in the air tank flows from the second air pipe via the fourth switching valve to the air sending / discharge pipe. Into the bituminous material tank, and the inside of the bituminous material tank is pressurized, and the pressure causes the bituminous material in the tank to be supplied into the spraying pipe through the above-mentioned pressure feeding pipe.

In this state, when the spray nozzle is opened and the second switching valve is closed, the bitumen material pumped from the bitumen material tank to the inside of the spray pipe through the pressure feed pipe is ejected from the spray nozzle and sprayed on the road surface. .

After the bitumen material spraying operation is completed, the spray nozzle is closed, and the third switching valve is switched to compress the first switching valve operating cylinder by compressed air supplied through the first air pipe from the air tank. Operate in the opposite direction,
By this operation, the first switching valve is switched to cut off the communication between the pressure-feeding pipe on the spraying pipe side and the pressure-feeding pipe on the bitumen material tank side, while bringing the pressure-feeding pipe on the spraying pipe side into communication with the third air pipe side. Further, when the second switching valve is operated to bring the return pipe into communication with the bitumen material tank and the spray pipe,
Compressed air sent from the air tank to the third air pipe is sent from the pressure feed pipe to the spray pipe through the first switching valve, flows through the return pipe through the spray pipe, and remains in the pressure feed pipe and the spray pipe. The bituminous material is returned into the bituminous material tank through the return pipe, and the inside of the pressure pipe and the spray pipe is washed.

Next, the spray nozzle is opened and the second
When the compressed air in the air tank is supplied to the third air pipe with the switching valve closed, the compressed air is press-fitted from the third air pipe into the spray pipe through the pressure feed pipe, and further,
It is discharged from the spray tube to the outside through all spray nozzles. Therefore, the bitumen material remaining in the spray nozzle is discharged and removed to the outside, and the spray nozzle is also cleaned.

According to a second aspect of the present invention, the air compressor for feeding the compressed air into the air tank is connected to a counter gear in a meshing gear train of the transmission connected to the vehicle engine via a clutch mechanism so that the output shaft can be freely turned on and off. Since it is configured to be driven from this output shaft via a V-belt, the vehicle engine can be shared for driving the air compressor by a simple mechanism, and at the same time as when transporting a bitumen material spraying vehicle. When it is no longer necessary to drive the air compressor, the drive of the air compressor can be stopped by disconnecting the output shaft from the transmission side counter gear.

In addition, since the air compressor is configured to be decelerated and driven via the V-belt, when the air compressor is connected via a clutch mechanism at the time of spraying, the air-belt is driven by the V-belt even if the vehicle engine operates up to the maximum speed. The compressor can be driven so that it does not rotate beyond the allowable maximum number of revolutions. Further, as described above, the output shaft is freely connected to the counter gear of the transmission so that it can be turned on and off, and the drive shaft is driven from this output shaft via the V-belt. The air compressor can be installed in a wider space, and the space can be effectively utilized in a narrow space. Even if the output shaft and the drive shaft of the compressor are slightly eccentric, the V-belt can be used. The compressor can be reliably and stably driven by absorption.

According to a third aspect of the present invention, when the air pressure in the air tank reaches a set pressure or more, the air compressor is unloaded to the air supply pipe for supplying the compressed air of the air compressor to the air tank. By installing an unloader that rotates, the air compressor performs no-load rotation when the air pressure in the air tank reaches the set pressure during the work of spraying bituminous material, eliminating unnecessary fuel consumption and economical operation. It becomes possible. In addition, the unloader has an effect of minimizing the energy loss of the vehicle engine even if the crack is left uncut.

Further, according to the fourth aspect of the present invention, the regulator is interposed in the middle of the second air pipe from the air tank to the fourth switching valve and in the first air pipe. The pressure can be adjusted from the individual air tanks to an air pressure suitable for operating a cylinder for switching the first switching valve through the first air pipe and an air pressure optimal for pressurizing the inside of the bituminous material tank through the second air pipe. And the high pressure air in the air tank is supplied to the third air pipe as it is, and the bitumen material remaining in the pressure feed pipe and the spray nozzle can be smoothly and reliably recovered and eliminated in a short time. .

Further, as described in claim 5, a branch air pipe is connected to and communicates with the third air pipe, and the branch air pipe is connected to the inside of the bituminous material tank via a fifth switching valve comprising a three-way switching valve. And a suction / discharge hose provided with an on-off valve connected and connected to a bituminous material supply / discharge pipe connected to the port, and a piping portion between the fifth switching valve and the on-off valve in the suction / discharge hose is connected via an on-off valve. By connecting the bituminous material distributing bar in advance, the fifth switching valve is operated to make the suction / discharge hose communicate with the bituminous material sending / discharging side, and further,
By operating the fourth switching valve, the air inlet / outlet pipe communicating with the bitumen material tank is connected to the air suction pipe side, and in this state, the air compressor is driven to remove the air in the bituminous material tank. When exhausted through the inlet / discharge pipe, air suction pipe, and exhaust pipe, the inside of the bitumen material tank is depressurized and suction force is generated in the suction / discharge hose, and the tip is immersed in the storage tank etc. A desired amount of bituminous material can be injected and filled into the bituminous material tank from the hose through the bituminous material feeding / discharging pipe.

Further, when the bituminous material put in the bituminous material tank is manually spread during pavement work, as described above, the compressed air in the air tank is supplied from the second air pipe to the bituminous material through the air inlet / outlet pipe. When the bitumen material tank is pressurized and the inside of the bituminous material tank is pressurized, the fifth switching valve is operated to connect the delivery / discharge pipe communicating with the bituminous material tank to the hand-spreading bar side. The bituminous material inside the tank is discharged to the hand-spread bar through an air supply / drain pipe by air pressure that pressurizes the inside of the tank, and the hand-spread bar can be operated to spray the bituminous material on the road surface.

When the inside of the bitumen material tank is emptied after the pavement work is completed, the compressed air in the air tank is supplied from the second air pipe into the bituminous material tank through the air inlet / outlet pipe as described above. When press-fitting and pressurizing the inside of the bitumen material tank, operating the fifth switching valve to connect the feed / discharge pipe communicating with the bituminous material tank to the suction / discharge hose side,
The bituminous material in the bituminous material tank can be discharged to a storage tank or the like through a suction / discharge hose from a supply / discharge pipe by air pressure that pressurizes the inside of the tank.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A specific embodiment of the present invention will be described with reference to the drawings.
This bite material spraying vehicle A has a small truck chassis of 2 ton class, and a spraying material tank 1 storing asphalt latex spraying material is mounted on the vehicle body. And an air compressor 3 and an air tank 4 driven by a vehicle engine 2 (shown in FIG. 2). Further, on the lower surface of the rear end portion of the vehicle body, a scatter pipe 5 composed of a long hollow pipe is provided.
A plurality of spray nozzles 6 are attached to the spray pipe 5 at small intervals in the length direction.

As shown in FIG. 2, the vehicle engine 2 includes:
The transmission 8 is connected to the transmission 8 via a clutch mechanism 7, and power is transmitted from the transmission 8 to the rear wheels. Further, an output shaft 81 for transmitting the driving force of the vehicle engine 2 to the air compressor side is freely connected to a reverse counter gear 8a of the transmission 8 so that the output shaft 81 can be turned on and off. This coupling structure spline-fits the gear 82 to the output shaft 81,
An actuator 83 operated by vacuum pressure used for a booster brake or the like of a vehicle is provided, and the actuator 82 slides the gear 82 on the output shaft 81 so as to mesh with or disengage with the counter gear 8a. What constitutes.

Therefore, when the gear 82 is engaged with the counter gear 8a during the operation of the vehicle engine 2, the output shaft 81 is driven to rotate by the vehicle engine 2, and the counter gear 8a is rotated.
When the gear 82 is disengaged from the output shaft 81, the output shaft 81 stops, that is,
The power is not transmitted to the air compressor 3 side. Also, a small-diameter pulley 9a is attached to the tip of the output shaft 81.
And a large-diameter pulley 9b is fixed to the drive shaft of the air compressor 3, and the air compressor 3 is decelerated via a V-belt 10 stretched between these pulleys 9a and 9b.

FIG. 3 shows a piping system for bituminous material.
Inside the bottom of the bituminous material tank 1 and the bituminous material dispersing pipe 5
And a return port 12 provided at both ends of the bituminous material dispersing tube 5.
One end of a return pipe 13 is connected to and communicated with the other end of the return pipe 13.
Inside. A first switching valve 14 composed of a three-way switching valve is interposed in the above-mentioned bituminous material pressure feeding pipe 11, and one opening of the first switching valve 14 communicates with the bituminous material tank 1 side. Piping section 11 of bitumen material pumping pipe 11
a, and a pipe portion 11b of the bitumen material pressure-feeding pipe 11, which communicates with the other side of the spray pipe 5 side, is communicated with the other opening. A drain cock 15 is provided in a pipe portion 11a communicating with the bitumen material tank 1 side.

Further, a third air pipe 32 to be described later is communicated with the remaining opening of the first switching valve 14, and the operation of the first switching valve 14 allows the pipe portions 11a and 11b of the bituminous material pumping pipe 11 to communicate with each other. The communication between the third air pipe 32 and the pipe section 11b of the bitumen material pressure feeding pipe 11 on the side of the spray pipe 5 is switched. In addition, a second switching valve for switching the direction of opening and closing the line of the return pipe 13 during the return pipe 13 is provided.
16 are interposed.

In the bottom of the bituminous material tank 1, one end of a bituminous material sending / discharging pipe 17 is provided separately from the pressure feeding pipe 11.
The other end of the bituminous material feeding / discharging pipe 17 is connected in communication with one opening of a fifth switching valve 18 comprising a three-way switching valve. The proximal end of a suction / discharge hose 20 having an opening / closing cock 19 is connected to another opening of the hose in a communicating state. In addition, the fifth
A branch air pipe 43 branched from the third air pipe 32 is connected to the remaining opening of the switching valve 18 through a check valve 21 and an opening / closing cock 22 in a communicating state.
Connecting a bituminous material distributing bar 24 having an on-off cock 23 in a pipe between the fifth switching valve 18 and the on-off cock 19 at 20;
They are communicating.

FIG. 4 shows the circuit of the air pipe. The discharge port of the air compressor 3 and the air tank 4 are connected to each other.
Connected by an air feed pipe 26 for feeding compressed air from the air compressor 3 to the air tank 4 through a check valve 25;
An unloader 27 which is connected to the air compressor 3 and rotates the air compressor 3 without load when the air pressure in the air tank 4 reaches a set pressure or more is interposed in the air supply pipe 26. Further, a pipe between the unloader 27 and the check valve 25 is connected to an on-off valve 28.
The exhaust pipe 29 provided with is branched.

The air tank 4 has a first air pipe.
30, one end of the second air pipe 31 and one end of the third air pipe 32 are separately connected and communicated, and the first air pipe 30 is provided with a third switching valve 33 having the other end provided in the pipe 30. Through the first
The switching lever 14a (shown in FIG. 3) of the switching valve 14 is connected and communicated with a cylinder 34 for operating the switching lever 14a. Further, the switching valve 35 for opening and closing the spray nozzle 6 is connected to the third switching valve 33 via a pipe. And a nozzle opening / closing cock 37 is opened / closed through a nozzle opening / closing air pipe 36 connected to the nozzle opening / closing switching valve 35.

A regulator 38 for reducing the high-pressure air in the air tank 4 to an appropriate pressure and adjusting the pressure in the bitumen material tank 1 to a constant pressure is interposed in the second air pipe 31. At the same time, one end of an air suction pipe 39 is connected and communicated with the suction side of the air compressor 3, and the other end of the second air pipe 31 and the other end of the air suction pipe 39 are connected via a fourth switching valve 40. It communicates with one end of the air inlet and outlet pipe 41,
Further, the other end of the air supply / discharge pipe 41 is connected to and communicated with the upper portion of the bituminous material tank 1, and the fourth switch valve 40 is operated to connect the air supply / discharge pipe 41 to the first air pipe. It is configured to switch between the 31 side and the air suction pipe 39 side.
Further, an on-off valve 44 is provided in a pipe leading to the regulator 38.
Is provided.

On the other hand, as shown in FIG. 3, the third air pipe 32 is connected to the first switching valve 14 via a regulator 42, a solenoid valve 46, and a check valve 47, and the regulator 42 and the solenoid 46 One end of the branch air pipe 43 is connected to and communicated with the pipeline between the pipe and the other end of the branch air pipe 43 via the check valve 21 and the open / close cock 22 as described above.
The switching valve 18 is connected and communicated.

Next, the operation of the bituminous material dispersing apparatus in the embodiment configured as described above will be described. First, when the bituminous material is sprayed on the road surface, the vehicle engine 2 is started, the vehicle is advanced at a desired speed from the clutch mechanism 7 via the transmission 8, and the actuator 83 is operated by the vacuum pressure used for the booster brake and the like. When the gear 82 meshes with the counter gear 8a, the driving force of the vehicle engine 2 is transmitted through the transmission 8 to the output shaft.
81 to the air compressor 3 via the V-belt 10.
Is decelerated and the compressed air is charged and stored in the air tank 4 through the air supply pipe 26 by the operation of the air compressor 3. When the air pressure in the air tank 4 reaches the set pressure, the unloader 27 operates and the air compressor 3
Is in a no-load rotation state.

As described above, at the time of filling and storing compressed air from the air compressor 3 into the air tank 4, as shown in FIGS.
The third switching valve 33 on the air pipe 30 side is in a closed state in which compressed air is prevented from flowing from the first air pipe 30 to the first switching valve operating cylinder 34 side, and the third switching valve 33 is also on the second air pipe 31 side. The on-off valve 44 is closed to prevent the supply of compressed air from the second air pipe 31 to the air supply / discharge pipe 41 side.
Further, the communication between the third air pipe 32 and the air pressure supply pipe 11 is also cut off by the first switching valve 14, and the branch air pipe 43 is also connected to the bituminous material supply / discharge pipe 17 by the fifth switching valve 18.
The communication with the suction / discharge hose 20 is shut off.

After the compressed air is filled and stored in the air tank 4, the spraying vehicle A is run at a constant speed by the vehicle engine 2, and a number of spraying nozzles 6 arranged in the spraying pipe 5 are used to spread the road surface to the road surface. Work to spray bituminous material. First, as shown in FIG. 6, when the open / close valve 44 is opened and the fourth switching valve 40 is operated to connect the second air pipe 31 to the air supply / discharge pipe 41, the air tank 4 Compressed air from the second air pipe 31 through the fourth switching valve 40 and the air inlet / outlet pipe 41 into the bituminous material tank 1,
The inside of the bituminous material tank 1 is pressurized by a predetermined air pressure set by a regulator 38 interposed in the second air pipe 31.

As described above, the inside of the bitumen material tank 1 is pressurized by the compressed air, and at the same time, the third switching valve 33 is excited to switch the first air pipe 30 through the third switching valve 33 to switch the first switching valve. To the cylinder 34 for
Is operated to rotate the lever 14a of the first switching valve 14, whereby the first switching valve 14 is connected to the bituminous material tank 1 as shown in FIG.
And the pipe portion 11b communicating with the spraying pipe 5 side, the bitumen material in the bituminous material tank 1 pressurized by the compressed air is spread through the bituminous material pressure feeding pipe 11 to the spraying pipe 5b.
Supplied within.

In this state, as shown in FIGS. 5 and 6, the second switching valve 16 is closed and the spray nozzle opening / closing switching valve 35 is excited to change the compressed air in the air tank 4 to the spray nozzle opening / closing. Air piping 36 for opening and closing the nozzle from valve 35
When the air is supplied to the side, the compressed air flowing through the air pipe 36 operates the nozzle opening / closing cock 37 to open all the spray nozzles 6, and the bituminous material flows into the spray nozzle 6 from inside the spray pipe 5 and the road surface Is to be sprayed.

The spray nozzles 6 are mounted as shown in FIG. 18 so as to communicate with the spray pipe 5 at small intervals in the length direction of the spray pipe 5 as shown in FIG. A valve body 60 that opens and closes with compressed air is provided. That is, the valve body 60 is fixed with the tubular valve body 61 penetrating between the upper and lower wall surfaces of the spray tube 5 and is fixed to the lower end of the valve body 61 protruding from the lower wall surface of the spray tube 5. 6 is mounted, and a rod 63 is disposed inside the valve body 61 so as to be slidable up and down.
The piston is mounted slidably in the upper end cylinder portion 64 of the
By pressing the lower end of the rod 62 closely to the valve seat 66 under normal conditions, the lower end of the valve body 61 in the spray pipe 5 and in the vicinity of the upper part of the valve seat 66 is pressed. The through hole 67 formed in the side portion is closed to shut off the communication from the inside of the spray pipe 5 to the spray nozzle 6 side, and the air pipe 36 through the inflow port 69 to the pressurizing chamber 68 on the lower surface side of the piston 63. By supplying compressed air from the side, the rod 62 is separated from the valve seat 66 so that the through hole 67 communicates with the spray nozzle 6.

The spraying width of the valve body 60 is set by a nozzle opening / closing cock 37 provided at the rear of the vehicle body in preparation for spraying, and the spraying nozzle opening / closing switching valve 35 and the nozzle are controlled by an external operation from the driver's seat or the like. Opening / closing cock 37, each spray nozzle 6
Is opened and closed by actuating the valve body 61 disposed at the same time. Therefore, any valve body 60 is opened and closed by remote control, and a desired number of spray nozzles 6 according to the spray width are spread from the bitumen in the spray pipe 5. It is configured to spray the material.

Next, in order to spray the bituminous material by using the manual spray bar 24 on the road surface or the like that could not be sprayed by the spray nozzle 6, as shown in FIG. While the inside of the bituminous material tank 1 is pressurized through 31, the third switching valve 33 is switched so that the first switching valve switching cylinder 34 is operated from the first air pipe 30 through the third switching valve 33 in the reverse direction. 34, the lever 14a of the first switching valve 14 is turned in the opposite direction to the above, and the first switching valve 14 is used to feed the bituminous material communicated with the bituminous material tank 1 as shown in FIG. The communication between the pipe portion 11a of the pipe 11 and the pipe portion 11b communicating with the spray pipe 5 side is cut off. Further, the communication between the third air pipe 32 and the first switching valve 14 is cut off by a solenoid valve 46 disposed in the third air pipe 32.

In this state, the fifth switching valve 18 provided on the branch air pipe 43 side is operated to cut off the communication between the branch air pipe 43 and the bitumen material suction / discharge hose 20 and to connect the bitumen material supply / discharge pipe 17 with the bitumen material supply / discharge pipe 17. The bite material suction / discharge hose 20 is communicated through the fifth switching valve 18. Further, the opening / closing cock 19 provided on the bituminous material suction / discharge hose 20 is closed, while the opening / closing cock 23 on the manual dispensing bar 24 side is opened. Then, the bituminous material in the bituminous material tank 1 pressurized by the compressed air is supplied from the bituminous material sending / discharging pipe 17 into the manual spreading bar 24 through the fifth switching valve 18, and the manual spreading bar 24 is operated. The bituminous material spouted from the hand-spread bar 24 is sprayed on a desired road surface while a member operates.

After completion of the pavement work, in order to recover the bituminous material remaining in the pipe into the tank 1, as shown in FIG. 10, the on-off valve 44 on the second air pipe 31 side is closed and the fourth air pipe is closed. The switching valve 40 is operated to cut off the communication between the air supply / discharge pipe 41 and the second air pipe 31 and the air suction pipe 39, and the third switching valve 33 is excited so that the air in the air tank 4 is removed. Compressed air is supplied to the first switching valve switching cylinder 34 through the first air pipe 30, and the first switching valve 14 is fed by the cylinder 34 to the bitumen material tank 1, as shown in FIG. While the pipe section 11a of the pipe 11 is shut off, the pipe section 11b communicating with the spray pipe 5 side is switched to a state in which it is communicated with the third air pipe 32, and all the spray nozzles 6 are closed. The open / close cock 22 in the branch air pipe 43 is closed.

In this state, the second switching valve 16 in the return pipe 13 is set.
Is opened to bring the return pipe 13 into communication with the bitumen material tank 1 and the spray pipe 5, while the solenoid valve 46 is opened to supply the compressed air in the air tank 4 to the third air pipe 32.
As shown in FIG. 9, compressed air adjusted to a predetermined air pressure by a regulator 42 provided in this piping is supplied from a third air piping 32 to a piping portion 11 b of a bituminous material pumping piping 11 through a first switching valve 14. The bitumen material which is pressure-fed and remains in the pipe portion 11b is caused to flow into the spray pipe 5 side by the air flow, and further, the compressed air is flowed into the spray pipe 5 and the bitumen remaining in the spray pipe 5 is left. Material also returns from return port 12
13 and is collected in the tank 1 through the return pipe 13 and the pipe portion 11 of the bituminous material feed pipe 11
b, and the inside of the spraying pipe 5 and the inside of the return pipe 13 are washed by compressed air flowing therethrough.

To remove the bituminous material remaining in the spraying nozzle 6 and clean the inside of the spraying nozzle 6, the return pipe 13 is closed by the second switching valve 16 as shown in FIG.
As shown in FIG. 12, the third switching valve 33 and the spray nozzle opening / closing switching valve 35 are excited to supply the compressed air from the air tank 4 from the first air pipe 30 to the third switching valve 33, the pipeline 45, the spray nozzle. By supplying the nozzle opening / closing cock 37 to the nozzle opening / closing air pipe 36 through the opening / closing switching valve 35, all the spray nozzles 6 are opened.

In this state, the solenoid valve 46 is opened to release the compressed air in the air tank 4 to the third air in the same manner as in the washing of the pipe portion 11b of the bituminous material pumping pipe 11 and the inside of the spray pipe 5 and the return pipe 13. When the compressed air is supplied to the pipe 32, the compressed air is ejected from the spray nozzle 6 through the third air pipe 32, through the first switching valve 14, the pipe portion 11b of the bitumen material pumping pipe 11, and the spray pipe 5, as shown in FIG. The bitumen material remaining in the spray nozzle 6 is discharged to the outside and the inside of the spray nozzle 6 is cleaned.

Further, in order to remove the bitumen material remaining in the manual dispensing bar 24 and clean the manual dispensing bar 24, as shown in FIG. 13, a solenoid disposed on the third air pipe 32 side is used. The valve 46 is closed to connect the air tank 4 from the third air pipe 32 to the branch air pipe 43, and the opening / closing cock 22 is opened.
Switch valve 18 with branch air piping 43 and bitumen material intake / discharge hose
20 is connected to the hose 20 and the opening / closing cock 19 in the hose 20 is closed. When compressed air is supplied to the 43 side,
The compressed air is pressure-fed to the manual spreading bar 24 through the branch air pipe 43 to discharge the bituminous material remaining in the manual winding bar 24 to the outside.

After the application of the bituminous material to the road surface,
In order to discharge all the bitumen material remaining in the tank 1 to a bituminous material storage tank (not shown) or the like, as shown in FIG.
The fifth switching valve 18 is switched so that the bituminous material supply / discharge pipe 17 and the bituminous material intake / discharge hose 20 communicate with each other.
While opening the opening / closing cock 19 inside, the opening / closing cock 23 on the side of the manual dispensing bar 24 communicating with the hose 20 is closed. In this state, as shown in FIG.
When the compressed air in the tank is pressure-fed into the bituminous material tank 1 through the second air pipe 31, the fourth switching valve 40, and the air inlet / outlet pipe 41 to pressurize the inside of the bituminous material tank 1, As shown in FIG. 14, the bituminous material was
It flows out into the bitumen material suction / discharge hose 20 through the switching valve 18 and is discharged to the outside from the open end of the hose 20.

In order to supply the bituminous material stored in the bituminous material storage tank into the tank 1, as shown in FIG. 17, a fourth switching valve 40 is connected to the air inlet / outlet pipe 41 and the air. Air suction pipe 39 connected to the suction side of compressor 3
And the opening and closing valve 28 of the exhaust pipe 29 communicating with the discharge side of the air compressor 3 is opened, while the fifth switching valve 18 is set to the bite material supply / discharge as shown in FIG. The pipe 17 and the bitumen material suction / discharge hose 20 are switched so as to communicate with each other, and the open / close cock 19 in the hose 20 is opened.

In this state, the end of the hose 20 is immersed in the bituminous material storage tank 1 and the air compressor 3
Is operated, the air in the bituminous material tank 1 is exhausted to the outside through the air inlet / outlet pipe 41 through the air suction pipe 39 and the exhaust pipe 29, and the pressure in the bituminous material tank 1 is reduced. The suction force is generated in the discharge pipe 17 and the bitumen material in the storage tank is sucked into the bitumen material suction / discharge hose 20 and supplied from the hose 20 into the bituminous material tank 1 through the bitumen material supply / drain pipe 17. It can be charged.

[0050]

As described above, according to the bituminous material dispersing apparatus of the present invention, the compressed air is stored in one air tank by driving the air compressor by the vehicle engine, and the compressed air is used to store the compressed air. It is designed to spray bituminous material in the material tank and to clean the inside of the pipe after spraying is completed, so not only can noise generation be minimized, but also hydraulic pumps and hydraulic motors Since no device is employed, the entire device can be simplified, a device optimal for a small bituminous material spreader can be constructed, and operation and management can be facilitated.

According to the second aspect of the present invention, the output shaft is freely connected to the counter gear in the meshing gear train of the transmission connected to the vehicle engine via the clutch mechanism, and the V-belt is connected from the output shaft. It is necessary to drive the air compressor, such as when transporting a bituminous material spreading vehicle, while sharing the vehicle engine for driving the air compressor by a simple mechanism. When it runs out, the drive of the air compressor can be stopped by disconnecting the output shaft from the transmission side counter gear.

In addition, since the air compressor is configured to be decelerated via the V-belt, when the air compressor is connected via the clutch mechanism during spraying, the air-belt is driven by the V-belt even when the vehicle engine operates up to the maximum speed. The compressor can be driven so that it does not rotate beyond the allowable maximum number of revolutions. Further, as described above, the output shaft is freely connected to the counter gear of the transmission so that it can be turned on and off, and the drive shaft is driven from this output shaft via the V-belt. The air compressor can be installed in a wider space, and the space can be effectively utilized in a narrow space. Even if the output shaft and the drive shaft of the compressor are slightly eccentric, the V-belt can be used. The compressor can be reliably and stably driven by absorption.

According to the third aspect of the present invention, when the air pressure in the air tank reaches a predetermined pressure or more, the air compressor is rotated without load to the air supply pipe for supplying the compressed air of the air compressor to the air tank. Since the unloader is installed, when the air pressure in the air tank reaches the set pressure during the work of spraying bituminous material, the air compressor can be set to no-load rotation, thus eliminating wasteful fuel consumption and economical Operation becomes possible. In addition, the unloader has an effect of minimizing the energy loss of the vehicle engine even if the crack is left uncut.

Further, according to the fourth aspect of the present invention, the regulator is interposed in the middle of the second air pipe from the air tank to the fourth switching valve and in the first air pipe. The pressure can be reduced from an individual air tank to an air pressure suitable for operating a cylinder for switching a first switching valve through a first air pipe, and an air pressure optimal for pressurizing a bituminous material tank through a second air pipe. A uniform spray amount can be set, and high-pressure air in the air tank is supplied to the third air pipe as it is, so that the bitumen material remaining in the pressure feed pipe and the spray nozzle can be smoothly and reliably collected and eliminated in a short time. it can.

According to the invention of claim 5, a branch air pipe is connected to and communicates with the third air pipe, and the bitumen material tank is connected to the branch air pipe via the fifth switching valve formed of a three-way switching valve. A bituminous material supply / discharge pipe connected to the inside and a suction / discharge hose provided with an on / off valve are connected and connected, and a pipe portion between the fifth switching valve and the on / off valve in the suction / discharge hose is connected via an on / off valve. Since the bitumen material distributing bar is connected, the air compressor is driven to reduce the pressure in the bituminous material tank, so that suction force is generated in the suction and discharge hose, and the tip is immersed in the storage tank etc. The required amount of bituminous material can be injected and filled into the bituminous material tank through the bituminous material feeding and discharging pipe from the suction and discharge hose, while the bituminous material placed in the bituminous material tank is manually distributed during pavement work When the inside bituminous material tank pressurized state by the compressed air in the air tank, the fifth
When the switching valve is operated to connect the feed / discharge pipe communicating with the bitumen material tank to the manual distributing bar side, the bituminous material in the bituminous material tank is manually operated through the feed / discharge pipe by air pressure that pressurizes the tank. It is discharged to the sprinkling bar and the manual sprinkling bar can be operated to spray bituminous material on the road surface.

When the inside of the bituminous material tank is emptied after the paving work is completed, the compressed air in the air tank is supplied from the second air pipe to the bituminous material tank through the air inlet / outlet pipe as described above. While pressurizing the inside of the bituminous material tank to pressurize it, the fifth switching valve is operated to connect the feed / discharge pipe communicating with the bituminous material tank to the suction / discharge hose side, thereby reducing the bitumen in the bituminous material tank. The material can be discharged to the storage tank or the like from the supply / discharge pipe through the suction / discharge hose by the air pressure that pressurizes the inside of the tank.

[Brief description of the drawings]

FIG. 1 is a simplified side view of a spreading vehicle,

FIG. 2 is a simplified explanatory view showing a drive transmission mechanism between a vehicle engine and a compressor;

FIG. 3 is a piping system diagram of bituminous material,

FIG. 4 is a circuit diagram of an air line;

FIG. 5 is a piping system diagram when bituminous material is sprayed,

FIG. 6 is a circuit diagram of the air pipe,

FIG. 7 is a piping system diagram when bituminous materials are manually spread,

FIG. 8 is a circuit diagram of the air pipe,

FIG. 9 is a piping diagram at the time of bitumen material recovery,

FIG. 10 is a circuit diagram of the air pipe,

FIG. 11 is a piping diagram at the time of washing the spray nozzle,

FIG. 12 is a circuit diagram of the air line,

FIG. 13 is a diagram of a piping system at the time of washing a hand-spread bar,

FIG. 14 is a piping system diagram when discharging bituminous material in a tank,

FIG. 15 is a circuit diagram of the air pipe,

FIG. 16 is a piping system diagram at the time of sucking and filling bituminous material into a tank,

FIG. 17 is a circuit diagram of the air pipe,

FIG. 18 is a longitudinal side view of a spray nozzle attached to a spray tube,

FIG. 19 is a simplified side view showing a conventional example.

FIG. 20 is a pipeline diagram of the distribution pipeline.

[Explanation of symbols]

 A Bituminous Material Spraying Car 1 Bituminous Material Tank 2 Vehicle Engine 3 Air Compressor 4 Air Tank 5 Spraying Tube 6 Spraying Nozzle 10 V Belt 11 Bitumen Material Pressure Feeding Pipe 14 First Switching Valve 16 Second Switching Valve 18 Fifth Switching Valve 26 Air Inlet Piping 27 Unloader 30 First air piping 31 Second air piping 32 Third air piping 34 Cylinder 38, 42 Regulator

 ────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Motoyuki Izumi 2-14-21 Moundoshima, Nishiyodogawa-ku, Osaka-shi, Osaka F-term in Norita Machinery Co., Ltd. 2D052 AA09 AC01 BA20 CA00 CA26

Claims (5)

[Claims] 1. A three-way switching valve comprising: a bitumen material tank installed on a bituminous material dispersing vehicle; and a dispersing tube having a plurality of dispersing nozzles disposed at a rear end of the bituminous material distributing vehicle. (1) The switching valve is connected and communicated by a bituminous material feeding pipe provided in the pipe, and the bituminous material return port of the spray pipe and the bituminous material tank are connected and communicated by a bituminous material return pipe having a second switching valve. The compressed air of an air compressor driven by a vehicle engine is stored in an air tank through an air supply pipe, and the
A third air pipe is connected and communicated, and the first air pipe is connected and connected to a cylinder for operating the first switching valve of the spray pipe via a third switching valve, while the second air pipe is connected to the air compressor. An air suction pipe communicating with the suction side is connected to and connected to an air supply / discharge pipe communicating with the bituminous material tank via a fourth switching valve, and the third air pipe is connected to the three-way pipe. A bituminous material dispersing apparatus, which is connected to and communicates with the bituminous material pressure-feeding pipe via a first switching valve including a switching valve. 2. An output shaft is freely connected to a counter gear in a meshing gear train of a transmission connected to a vehicle engine via a clutch mechanism, and the output shaft is connected to a drive shaft of an air compressor via a V-belt. The bituminous material dispersing apparatus according to claim 1, wherein the air compressor is configured to be decelerated and driven. 3. An air supply pipe for supplying compressed air of an air compressor to an air tank is provided with an unloader for rotating the air compressor without load when the air pressure in the air tank reaches a predetermined pressure or more, and an exhaust pipe. The bituminous material spraying device according to claim 1, wherein the bitumen material is connected and communicated. 4. The bituminous material according to claim 1, wherein a regulator is interposed in the middle of the second air pipe from the air tank to the fourth switching valve and in the first air pipe. Spraying device. 5. A third air pipe is connected and connected to a branch air pipe, and the branch air pipe is opened and closed with a bituminous material supply / discharge pipe connected to a bituminous material tank via a fifth switching valve comprising a three-way switching valve. A suction and discharge hose provided with a valve is connected and communicated, and a bitumen material distributing bar is connected to a piping portion of the suction and discharge hose between the fifth switching valve and the on-off valve via the on-off valve. The apparatus for spraying bituminous material according to claim 1, wherein: