JP2008106446A - Asphalt emulsion spraying apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To make spray density uniform without performing complicated switch operating work even if changing the spray width of an asphalt emulsion. <P>SOLUTION: Spray bars 18R, 18L formed by arranging a plurality of spray nozzles 19A-19E, 19a-19e for spraying the asphalt emulsion supplied from an emulsion tank, at spaces in the width direction of a traveling vehicle, are arranged in two front and rear rows, and the two front and rear rows of spray bars 18R, 18L are provided to be relatively movable along the arranged direction of the spray nozzles 19A-19E, 19a-19e. A control device 17 is provided for automatically turning on/off the emulsion spray of the spray nozzles in one spray bar relative to the spray nozzles in the other spray bar out of the spray nozzles 19A-19E, 19a-19e put in a longitudinally overlapped state. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an asphalt emulsion spraying apparatus, and more particularly to an asphalt emulsion spraying apparatus dedicated to emulsion spraying for spraying an asphalt emulsion on a lower road surface.

  Asphalt finisher equipped with asphalt emulsion spraying device, asphalt emulsion is accumulated in the hopper while being sprayed on unpaved roadbed, asphalt pavement or concrete pavement etc. It is known that the asphalt mixture is fed on the emulsion sprayed on the lower road surface by a delivery device and spread with a screed.

  In the asphalt emulsion spraying apparatus applied to such an asphalt finisher, a plurality of spray bars in which a plurality of spray nozzles for spraying asphalt emulsion supplied from the emulsion tank are arranged at intervals in the width direction of the traveling vehicle, There is one that adjusts the spreading width by being provided so as to be relatively movable along the arrangement direction in a state along the arrangement direction of the spray nozzles (for example, Patent Document 1, Patent Document 2, Patent Document). 3).

In the asphalt emulsion spraying device, when the spray bars are overlapped with each other in the spray nozzle arrangement direction, the spray nozzles of both spray bars exist in the overlapping portion. As a result, the spray density of the asphalt emulsion is increased only in the overlapping portion. Therefore, it is necessary to perform an operation such as turning off the spray nozzle in the portion overlapping one of the spray bars with respect to the other. Conventionally, this on / off operation of the spray nozzle has been manually performed via a switch.
Japanese Utility Model Publication No. 1-1775. Japanese Patent No. 3542903. Japanese Patent No. 3797958.

  However, when the spray nozzle is manually turned on / off via a switch, there is a problem that a part that is not sprayed or a part that overlaps spray is formed due to forgetting to turn on or forgetting to switch on. Further, there is a problem that a complicated switch operation work of turning the switch on and off has to be further performed.

  Therefore, even if the spreading width of the asphalt emulsion is changed, there is a technical problem to be solved in order to make the spreading density uniform without performing complicated switch operation work. The present invention aims to solve this problem.

  The present invention has been proposed in order to achieve the above object, and the invention according to claim 1 is characterized in that a plurality of spray nozzles for spraying asphalt emulsion supplied from the emulsion tank are spaced apart in the width direction of the traveling vehicle. In the asphalt emulsion spraying apparatus, spray bars arranged in an open manner are arranged in at least two front and rear rows, and the two front and rear spray bars are provided so as to be relatively movable along the direction of the spray nozzle arrangement. Among the spray nozzles that overlap each other by the relative movement of the spray bars in a row, switch control that automatically turns on / off the emulsion spray of the spray nozzle in one spray bar with respect to the spray nozzle in the other spray bar An asphalt emulsion spraying device is provided.

  According to this configuration, when the spray width of the asphalt emulsion is changed and the front and rear spray bars are relatively moved so that the spray nozzles overlap in the front and rear, the switch control means is configured to switch the spray nozzles overlapping in the front and rear. Among them, since the emulsion spraying of the spray nozzle in one spray bar is automatically turned on / off to the spray nozzle in the other spray bar, the operator does not need to perform complicated switch operation work.

  According to a second aspect of the present invention, in the first aspect, the switch control means is provided with an automatic / manual switching selection means capable of automatically or manually performing an emulsion spraying on / off operation in the spray nozzle. An asphalt emulsion spraying device is provided.

  According to this configuration, the on / off operation of the emulsion spraying in the spray nozzle can be performed either automatically or manually.

  According to a third aspect of the present invention, a plurality of switch levers for individually operating the switches in the switch control means are provided on one side of the two rows of the front and rear spray bars along the arrangement direction of the spray nozzles. And when the two front and rear spray bars are relatively moved, the striker provided on the other spray bar contacts the switch lever in order and switches the operation of the switch lever, and There is provided an asphalt emulsion spraying device in which the switch control means controls on / off of the spray nozzle by a switching signal of the switch lever.

  According to this configuration, when the two front and rear spray bars are relatively moved, a signal is sent to the switch control means by switching the operation of the switch lever corresponding to the movement, and the spray nozzles at the locations corresponding to the relative movement positions are An on / off operation is automatically performed.

  According to the first aspect of the present invention, even if the spreading width of the asphalt emulsion is changed, the on / off operation for the overlapping spray nozzles is automatically performed by the switch means, so that the operator can perform complicated switch operation work. There is no need to do so, and the burden on the operator is reduced. Further, when the switch is forgotten to be turned on or the switch is forgotten to be turned off, there is no occurrence of a portion that is not sprayed or a portion that is sprinkled twice, and the spraying density can be made uniform.

  In the invention according to claim 2, since the on / off operation of the emulsion spraying in the spray nozzle can be performed either automatically or manually, the spray nozzle can be manually operated at the time of inspection, for example. In addition to the effects of the present invention, workability is improved.

  The invention according to claim 3 can easily know the relative positions of the front and rear spray bars using the arrangement of the switch levers, so that the structure can be simplified. In addition to the effects, cost reduction can be expected.

  Spreading asphalt emulsion supplied from the emulsion tank to achieve the goal of making the spray density uniform without complicated switch operation even if the spray width of the asphalt emulsion is changed. Spray bars in which a plurality of spraying nozzles arranged at intervals in the width direction of the traveling vehicle are arranged in at least two front and rear rows, and the two front and rear spray bars are arranged along the direction in which the spray nozzles are arranged. In the asphalt emulsion spraying device provided so as to be relatively movable, among the spray nozzles that overlap each other by the relative movement of the two rows of spray bars, emulsion spraying of the spray nozzle in one spray bar is performed on the other spray bar. This is realized by providing a switch control means that automatically turns on and off the spray nozzle in the spray bar.

  Hereinafter, the asphalt emulsion spraying apparatus of the present invention will be described with reference to preferred examples.

  1 and 2 show an example of an asphalt finisher to which an asphalt emulsion spraying apparatus according to an embodiment of the present invention is applied.

  1 and 2, the asphalt finisher 1 has a vehicle body 3 supported by front wheels (steering wheels) 2a and rear wheels (drive wheels) 2b, and the power of the engine in the power unit 4 mounted on the vehicle body 3 is shown. A self-propelled vehicle (running vehicle) 5 traveling by the vehicle 5, a hopper 6 for accommodating the asphalt mixture provided at the front of the vehicle 5, and the width direction of the vehicle body 3 at the rear of the vehicle 5 (FIG. 1). Between the bottom of the hopper 6 and the spreading screw 7 in the front-rear direction (in the vertical direction in FIG. 2, the direction perpendicular to the paper surface in FIG. 2). A bar feeder (feeding device) 8 provided along the left and right directions in FIGS. 1 and 2, and a front end is rotatably supported on both sides in the center in the front-rear direction of the vehicle 5, and a rear end is a cylinder 9 is supported by the vehicle body 3 so as to be movable up and down. Leveling arm 10, a screed 11 which is supported by the rear end of the leveling arm 10 and can be turned up and down by a cylinder (not shown) and which can be expanded and contracted in the width direction of the vehicle 5, and an asphalt emulsion spraying device. 12 and a driver's seat 14 having a control device 13. This configuration is basically the same as that of an asphalt finisher equipped with a conventional asphalt emulsion spraying device.

  The asphalt emulsion spraying device 12 is supplied with an asphalt emulsion in an emulsion tank 15 mounted at the center upper part in the front-rear direction of the vehicle body 3, and an emulsion spraying mechanism 16 for spraying the supplied asphalt emulsion on the lower road surface. 3 and 4) and a control device 17 (see FIG. 3) as switch control means for switching the supply of the asphalt emulsion to the emulsion spraying mechanism 16.

  As shown in FIGS. 3 and 4, the emulsion spraying mechanism 16 has square cylindrical spray bars 18 </ b> R and 18 </ b> L extending along the width direction of the vehicle 5. The spray bars 18R and 18L are arranged in two rows in the front-rear direction, and are disposed so as to be relatively movable along the longitudinal direction (the width direction of the vehicle 4).

  The spray bar 18R has a plurality of (this embodiment) attached to the lower part of the spray bar 18R with a predetermined interval in the longitudinal direction of the spray bar 18R and with the mouth for ejecting the asphalt emulsion facing downward. 5) spray nozzles 19A, 19B, 19C, 19D, and 19E with valves, and emulsion open / close valves 21R1 to 21R5 corresponding to the spray nozzles 19A, 19B, 19C, 19D, and 19E, respectively. Yes.

  Emulsion electromagnetic open / close valves 21R1 to 21R5 are individually operated by open / close switches SW1 to SW4 and the like provided in the control device 17. When the open / close switches SW1 to SW4 are turned on, the valves open and compressed air from the compressor 25 is opened. Is supplied to the spray nozzles 19A to 19E through the pipe 26, and the supplied compressed air opens the valves in the spray nozzles 19A to 19E, and the asphalt supplied from the emulsion tank 15 via the emulsion pump 24 and the flow path 20 is supplied. The emulsion is sprayed through spray nozzles 19A-19E. On the other hand, when the on / off switches SW1 to SW4 are turned off, the valve is closed, the supply of compressed air from the compressor 25 is stopped, the valves in the spray nozzles 19A to 19E are also closed, and asphalt emulsion spraying is also stopped. ing.

  On the other hand, in the same manner as the spray bar 18R, the spray bar 18L has a predetermined interval in the longitudinal direction of the spray bar 18L, and the mouth from which the asphalt emulsion is ejected faces downward. Spraying nozzles 19a, 19b, 19c, 19d, 19e with a plurality of valves (five in the present embodiment) attached to the lower part of the nozzle, and an electromagnetic on-off valve 21L1 for emulsion corresponding to each of the spraying nozzles 19a-19e. To 21L5.

  Emulsion electromagnetic open / close valves 21L1 to 21L5 are individually operated by open / close switches SW1 to SW4 and the like provided in the control device 17, and open when the open / close switches SW1 to SW4 are turned on. Is supplied to the spray nozzles 19a to 19e through the pipe 26, the valves in the spray nozzles 19a to 19e are opened by the supplied compressed air, and the asphalt supplied from the emulsion tank 15 via the emulsion pump 24 and the flow path 20 is supplied. The emulsion is sprayed through spray nozzles 19a to 19e with valves. On the other hand, when the on / off switches SW1 to SW4 are turned off, the valve is closed, the supply of compressed air from the compressor 25 is stopped, the valves in the spray nozzles 19A to 19E are also closed, and asphalt emulsion spraying is also stopped. ing.

  Further, on the front spray bar 18R, switch levers LS1, LS2, LS3, and LS4 corresponding to the spray nozzles 19A, 19B, 19C, and 19D are respectively protruded toward the rear spray bar 18L. Is provided. These switch levers LS1, LS2, LS3, and LS4 individually correspond to the open / close switches SW1 to SW4, and by tilting, the open / close switches SW1 to SW4 corresponding to the tilted switch levers LS1 to LS4 are turned on. It is supposed to work off.

  On the other hand, when the spray bars 18R and 18L move relative to the rear spray bar 18L, the spray nozzle 19A on the spray bar 18R side, the spray nozzle 19a on the spray bar 18L side, the spray nozzles 19B and 19b, and the spray nozzle similarly. 19C and 19c, and the spray nozzles 19D and 19d are in contact with the switch levers LS1, LS2, LS3, and LS4 in order, and tilt all the switch levers LS1 to LS4 within the corresponding range. A striker 22 is provided for switching the open / close switches SW1 to SW4 from on to off through this tilting. Note that the tilting of the switch levers LS1 to LS4 returns to the upright state when the contact with the striker 22 is released.

  The control device 17 is connected to the emulsion electromagnetic on-off valves 21L1 to 21L5 via signal supply lines 23a to 23e, and is connected to the emulsion electromagnetic on-off valves 21R1 to 21R5 via signal supply lines 23A to 23E. Yes. In addition, the open / close switch SW1 linked to the switch lever LS1 is provided in the circuit portion 17A connected to the signal supply line 23A, and linked to the switch lever LS2 in the circuit portion 17a connected to the signal supply line 23a. The open / close switch SW2 is linked to the switch lever LS3 in the circuit portion 17B connected to the signal supply line 23B, and the open / close switch SW3 is linked to the switch river LS4 in the circuit portion 17b connected to the signal supply line 23b. An open / close switch SW4 is provided.

  The asphalt emulsion spraying device 12 configured in this way, when changing the spray width of the asphalt emulsion, moves the spray bars 18R and 18L relative to each other in the left-right direction, and is formed in the vehicle width direction formed by the spray bar 18R and the spray bar 18L. Change the length of the. At that time, the spraying of the emulsion by the spray nozzles 19A to 19E and 19a to 19e is controlled through the electromagnetic solenoid valves 21R1 to 21R5 and 21L1 to 21L5 for the emulsion to make the spray density uniform. An example of a spraying format used to make the spraying density uniform is a relationship diagram between the pavement width and emulsion electromagnetic on-off valves 21R1 to 21R5 and 21L1 to 21L5 shown in FIG.

  Next, the operation of the asphalt emulsion spraying device 12 in the present embodiment will be described with reference to FIGS.

  In FIG. 5, (a) shows the maximum pave width L1, and in this state, the spray nozzle of the spray bar 18R and the spray nozzle of the spray bar 18L are not overlapped in the front-rear direction, and the switch lever All of LS1 to LS4 are in an upright state, and all of the open / close switches SW1 to SW4 interlocked with the switch levers LS1 to LS4 are in an on state. As a result, the control device 17 opens all the electromagnetic solenoid valves for emulsions 21R1 to 21R5, 21L1 to 21L5, and maintains the “ON” operation in which asphalt emulsion is sprayed from all the spray nozzles 19A to 19E and 19a to 19e. ing.

  In FIG. 5, (b) shows a pave width L2 that is narrower than the maximum pave width L1, and in this state, the spray nozzle 19A of the spray bar 18R and the spray nose 19a of the spray bar 18L overlap in the front-rear direction. The switch lever LS1 is tilted, the switch levers LS2 to LS4 are upright, the open / close switch SW1 in the control device 17 is off, and the open / close switches SW2 to SW4 are on. As a result, the control device 17 closes the emulsion electromagnetic on-off valve 21R1 and opens the emulsion electromagnetic on-off valves 21R2 to 21R5, 21L1 to 21L5, and stops spraying of the asphalt emulsion from the spray nozzle 19A ("OFF"). Operation), the “on” operation in which the asphalt emulsion is sprayed from the spray nozzles 19B to 19E and 19a to 19e is held. That is, the spray nozzles 19A and 19a overlapping in the front-rear direction make the spray density uniform by spraying asphalt emulsion only to one of the spray nozzles 19a to eliminate the overlapping spray portion.

  In FIG. 5, (c) shows a pave width L3 that is narrower than the pave width L2. In this state, the spray nozzles 19A and 19B of the spray bar 18R and the spray noses 19a and 19b of the spray bar 18L are in the front-rear direction. The switch levers LS1 and LS2 are tilted, the switch levers LS3 and LS4 are upright, the open / close switches SW1 and SW2 in the control device 17 are off, and the open / close switches SW3 and SW4 are on. As a result, the control device 17 closes the emulsion electromagnetic on / off valves 21R1 and 21L1 and opens the emulsion electromagnetic on / off valves 21R2 to 21R5 and 21L2 to 21L5 to stop the asphalt emulsion spraying from the spray nozzles 19A and 19a. (“OFF” operation), “ON” operation in which the asphalt emulsion is sprayed from the spray nozzles 19B to 19E and 19b to 19e is held. In other words, the spray nozzles 19A and 19B and the spray nozzles 19a and 19b that overlap in the front-rear direction disperse the asphalt emulsion by spraying only one of the spray nozzles 19b and 19B, respectively, thereby eliminating the overlapping spraying portion and making the spray density uniform. .

  In FIG. 5, (d) shows a pave width L4 that is narrower than the pave width L3. In this state, the spray nozzles 19A, 19B, 19C of the spray bar 18R and the spray noses 19a, 19b, 19c of the spray bar 18L Are overlapped in the front-rear direction, the switch levers LS1, LS2, LS3 are tilted, the switch lever LS4 is upright, the open / close switches SW1, SW2, SW3 in the control device 17 are off, and the open / close switch SW4 is on It is in. As a result, the control device 17 closes the emulsion electromagnetic on / off valves 21R1, 21L1, and 21R2, opens the emulsion electromagnetic on / off valves 21R3 to 21R5, 21L2 to 21L5, and opens the asphalt emulsion from the spray nozzles 19A, 19a, and 19B. The spraying is stopped (“off” operation), and the “on” operation in which the asphalt emulsion is sprayed from the spray nozzles 19C to 19E and 19b to 19e is maintained. That is, the spray nozzles 19A, 19B, and 19C and the spray nozzles 19a, 19b, and 19c that overlap in the front-rear direction eliminate the overlapping spraying portion by spraying the asphalt emulsion only to the one spray nozzle 19b, 19c, and 19C, respectively. Make spraying density uniform.

  In FIG. 5, (e) is when the pave width L5 is narrower than the pave width L4. In this state, the spray nozzles 19A, 19B, 19C, 19D of the spray bar 18R and the spray noses 19a, 19b of the spray bar 18L, 19c and 19d overlap with each other in the front-rear direction, the switch levers LS1, LS2, LS3, and LS4 are in an operating state, and the open / close switches SW1, SW2, SW3, and SW4 in the control device 17 are all in an open state. As a result, the controller 17 closes the emulsion electromagnetic on / off valves 21R1, 21L1, 21R2, and 21L2, opens the emulsion electromagnetic on / off valves 21R3 to 21R4, and 21L3 to 21L5, and spreads the spray nozzles 19A, 19a, 19B, and 19b. The asphalt emulsion is stopped from being sprayed ("off" operation), and the "on" operation in which the asphalt emulsion is sprayed from the spray nozzles 19C to 19E and 19c to 19e is maintained. That is, the spray nozzles 19A, 19B, 19C, and 19D and the spray nozzles 19a, 19b, 19c, and 19d that overlap in the front-rear direction are overlapped by spraying asphalt emulsion only on one spray nozzle 19c and 19d, 19C, and 19D, respectively. Eliminate the part to be sprayed and make the spraying density uniform.

  On the contrary, when the pave width is increased from the pave width L5 to the pave width L1, the operation opposite to this is performed, that is, (e) to (a) are controlled in this order.

  Thus, in Example 1 above, when the asphalt emulsion spraying width is changed and the front and rear spray bars 18L and 18R are relatively moved, the spray nozzles 19A to 19E and 19a to 19e overlap each other in the front and back. As a control means, the control device 17 automatically enters the emulsion spraying of the spray nozzle in one spray bar among the spray nozzles 19A to 19E and 19a to 19e overlapping before and after the spray nozzle in the other spray bar. Therefore, the operator does not have to perform complicated switch operation work.

  FIG. 6 is a control system diagram showing a second example of the asphalt emulsion spraying apparatus in the present embodiment. In the second embodiment, automatic / manual changeover switches Sa21, Sa22, Sa23, Sa24 as automatic / manual changeover switch means are provided in the signal supply lines 23A, 23B, 23a, 23b in the control device 17, and signal supply lines are provided. Since manual switches Sm21 to Sm26 are provided in 23C, 23D, 23E, 23c, 23d, and 23e, and other configurations are the same as those in FIG. 3, the same members are denoted by the same reference numerals and duplicated. Description is omitted.

  This second embodiment is the same as the first embodiment when the movable pieces of the automatic / manual changeover switches Sa21 to Sa24 are switched to the contact a (automatic) side and all the manual switches Sm21 to Sm26 are turned on. The operation circuit form is obtained, and the same operation as in the first embodiment is obtained.

  Further, when any of the manual switches Sm21 to Sm26 is switched from on to off in the work inspection or the like, the emulsion electromagnetic on-off valves 21R3 to 21R5 and 21L3 to 21L5 corresponding to the manual switches Sm21 to Sm26 switched off. Is in a closed operation state, and the spraying of asphalt emulsion from the corresponding spray nozzles 19C to 19E, 19c to 19e can be stopped.

  Furthermore, when any of the movable pieces of the automatic / manual change-over switches Sa21, Sa22, Sa23, Sa24 is switched to the contact m (manual) side for work inspection or the like, the corresponding electromagnetic on-off valve for emulsion (21R1, 21R1, 21R2, 21L1, 21L2) are in a manual operation mode, and asphalt emulsion can be sprayed from the corresponding spray nozzles (19A, 19B, 19a, 19b) without depending on the operation of the open / close switches SW1 to SW4. It can be done.

  Therefore, in the second embodiment, by combining the switching operation of the automatic / manual changeover switches Sa21, Sa22, Sa23, Sa24 and the operation of the manual switches Sm21 to Sm26, the automatic operation and the combined operation of automatic and manual, and , Allowing only manual operation.

  FIG. 7 is a control system diagram showing a third example of the asphalt emulsion spraying apparatus in the present embodiment. In the third embodiment, manual switches Sm31 to Sm40 are provided in conjunction with the automatic / manual changeover switch Sa30, and the other components are the same as in FIG. A duplicate description is omitted.

  In the third embodiment, the manual switches Sm31 to Sm40 are interlocked with the automatic / manual changeover switch Sa30, and when the movable piece of the automatic / manual changeover switch Sa30 is switched to the contact a (automatic) side, Sm40 is turned off all at once, and the same automatic operation circuit as that in the first embodiment is formed to be in the automatic operation mode. On the other hand, when the movable piece of the automatic / manual changeover switch Sa30 is switched to the contact m (manual) side, the manual switches Sm31 to Sm40 are turned on all together, without depending on the operation of the open / close switches SW1 to SW4. Asphalt emulsion can be sprayed from the spray nozzles (19A-19E, 19a-19e).

  It should be noted that the present invention can be variously modified without departing from the spirit of the present invention, and the present invention naturally extends to the modified ones. For example, in the structure of the present embodiment, a structure in which spray bars are arranged in two rows in the front and rear directions is shown, but two or more rows may be used.

1 is a top view of an asphalt finisher provided with an asphalt emulsion spraying device according to an embodiment of the present invention. Similarly, the side view of the asphalt finisher provided with the asphalt emulsion spraying apparatus which concerns on one embodiment of this invention. The control system figure which shows the 1st Example of the asphalt emulsion spraying apparatus in one embodiment of this invention. Similarly, the schematic structure perspective view of the emulsion spraying mechanism in an asphalt emulsion spraying apparatus. It is a figure which shows the relationship between the pavement width | variety of the asphalt emulsion spraying apparatus in 1st Example, and an emulsion valve | bulb, (a) is a figure when it is pavement width L1, (b) is a figure when it is pavement width L2, (c) is a figure when it is the pavement width L3, (d) is a figure when it is the pavement width L4, and (e) shows a figure when it is the pavement width L5. The control system figure which shows the 2nd Example of the asphalt emulsion spraying apparatus in this Embodiment. The control system figure which shows the 3rd Example of the asphalt emulsion spraying apparatus in this Embodiment.

Explanation of symbols

16 Emulsion spreading mechanism 17 Control device (switch control means)
17A, 17a, 17B, 17b Circuit unit 18R, 18L Spray bar 19A-19E Spray nozzle 19a-19e Spray nozzle 20 Flow path 21R1-21R5 Emulsion valve 21L1-21L5 Emulsion valve 22 Striker 23A-23E Signal supply lines 23a-23e Signal supply Line SW1-SW4 Open / close switch LS1-LS4 Switch lever L1-L5 Pave width

Claims (3)

A spray bar in which a plurality of spray nozzles for spraying asphalt emulsion supplied from an emulsion tank are arranged at intervals in the width direction of the traveling vehicle is arranged in at least two front and rear rows. In an asphalt emulsion spraying device provided so as to be relatively movable along the direction of arrangement of the spray nozzles,
Among the spray nozzles that overlap each other by the relative movement of the two rows of spray bars, the spray spraying of the spray nozzle in one spray bar is automatically turned on and off with respect to the spray nozzle in the other spray bar. An asphalt emulsion spraying device provided with switch control means.   2. An asphalt emulsion spraying means according to claim 1, wherein said switch control means is provided with an automatic / manual switching selection means capable of automatically or manually performing an emulsion spraying operation at said spray nozzle. apparatus.   A plurality of switch levers for individually operating the switches in the switch control means on the spray bar on one side of the two front and rear rows of spray bars, provided at predetermined intervals along the arrangement direction of the spray nozzles, When the two front and rear spray bars are moved relative to each other, a striker provided on the other spray bar contacts the switch lever in order to switch the operation of the switch lever, and the switch control means includes the switch lever. The asphalt emulsion spraying apparatus according to claim 1 or 2, wherein on / off of said spraying nozzle is controlled by a switching signal.

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