Protective Frame of Speed Sprayer

Abstract

To protect a driver from an obstacle from the front during spray-traveling and protect the driver at the time of vehicle rollover.SOLUTION: During spray-traveling of a speed sprayer 100, an upper frame 13b is rotated forward from an upright position, and a connection frame 13c is tilted forward to a forward tilt position located in front of a front end of a seat 5 in plan view. Thus, a safety area S2 against an obstacle such as a branch from the front during spray-traveling is formed behind an area surrounded by a forward-tilted gate-shaped frame 13x, thereby ensuring safety of a lower face part substantially below the nose, the neck, the chest or the like of a driver D seated on the seat 5 and performing driving operation. In addition, a safety area S3 during vehicle rollover is formed below a virtual line VL2 connecting an upper portion of the forward-tilted gate-shaped flame 13x and an upper portion of a tip end portion of the speed sprayer 100 and below the area surrounded by the forward-tilted gate-shaped flame 13x, thereby also ensuring safety of the driver D seated on the seat 5 and performing driving operation at the time of vehicle rollover during spray-traveling.SELECTED DRAWING: Figure 8

Description

Technical Field

[0001] The present invention relates to a protective frame for a speed sprayer.

Background Art

[0002] Conventionally, in a tractor as an agricultural vehicle, in the event of a rollover, in order to protect the operator, a two-pillar safety frame is provided on the rear part of the vehicle body, which is known (see, for example, Patent Document 1). This two-pillar safety frame is erected so as to sandwich the rear of the seat where the driver sits and operates the vehicle from both sides in the left-right direction of the vehicle, forming a portal shape in the front-rear direction view of the vehicle. And this safety frame can protect the driver when the vehicle rolls over and improve the safety of tractor work.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] When such a safety frame of a tractor is applied as a protective frame to a speed sprayer without a cabin in an agricultural vehicle, during spraying travel, for example, when traveling in an orchard while spraying a chemical solution, obstacles such as branches may hit the driver's neck and chest mainly from the front, and improvement is required.

[0005] Therefore, an object of the present invention is to provide a protective frame for a speed sprayer that can protect the driver from obstacles such as branches from the front during spraying travel of the speed sprayer, can protect the driver when the vehicle rolls over during spraying travel, and in addition, can protect the driver when the vehicle rolls over during normal travel of the speed sprayer.

Means for Solving the Problems

[0006] The protective frame (13) of the speed sprayer (100) according to the present invention includes, from the front to the rear of the vehicle (1), a seat (5) on which the driver (D) sits, a chemical liquid tank (6) storing the chemical liquid, and an engine room (7) storing the drive source, in this order. At the rear, it is provided with a nozzle head (8) having a plurality of spray nozzles (11) for spraying the chemical liquid, and a blower (9) for sending air from the front-rear direction of the vehicle into the nozzle head (8). While running by the operation of the driver (D) sitting on the seat (5), air is sent from the blower (9) to the nozzle head (8), and the chemical liquid from the spray nozzles (11) is sprayed around the vehicle (1). The protective frame (13) is applied to the speed sprayer (100) and secures safety areas (S1, S2, S3) for the driver (D) sitting on the seat (5). The protective frame (13) includes a lower frame (13a) arranged to sandwich the rear side of the seat (5) from both sides in the left-right direction of the vehicle and extending upward, and a portal frame (13x) connected to the upper part of each of the lower frames (13a) and forming a portal shape in the front-rear direction view of the vehicle. The portal frame (13x) includes an upper frame (13b) connected to the upper part of each of the lower frames (13a) and extending upward, and a connecting frame (13c) connecting the upper parts of the upper frames (13b). The upper frame (13b) is rotatably connected to the lower frame (13a) and is movable between an upright position upright with respect to the lower frame (13a) and a forward-tilted position where it rotates forward from the upright position and the connecting frame (13c) is located in front of the front end of the seat (5) in a plan view.

[0007] According to the protective frame (13) of such a speed sprayer (100), during normal running of the speed sprayer (100), by standing the upper frame (13b) upright to the upright position, a safety area (S1) during vehicle rollover is formed below the virtual line (VL1) connecting the upper part of the upright portal frame (13x) and the upper part of the tip of the speed sprayer (100), ensuring the safety of the driver (D) sitting on the seat (5) and performing driving operations during vehicle rollover in normal running. On the other hand, during spraying operation of the speed sprayer (100), by rotating the upper frame (13b) forward from the upright position to the forward-tilted position where the connecting frame (13c) is located in front of the front end of the seat (5) in plan view, a safety area (S2) against obstacles such as branches from the front during spraying operation is formed behind the area surrounded by the forward-tilted portal frame (13x), ensuring the safety of the driver (D) sitting on the seat (5) and performing driving operations, such as the safety of the face part below the nose, neck, chest, etc. of the driver (D). In addition, during spraying operation of the speed sprayer (100), a safety area (S3) during vehicle rollover is formed below the virtual line (VL2) connecting the upper part of the forward-tilted portal frame (13x) and the upper part of the tip of the speed sprayer (100), and below the area surrounded by the forward-tilted portal frame (13x), ensuring the safety of the driver (D) sitting on the seat (5) and performing driving operations during vehicle rollover in spraying operation. That is, by the forward-tilt positioning of the upper frame (13b), protection of the driver (D) against obstacles such as branches from the front during spraying operation of the speed sprayer (100) and protection of the driver (D) during vehicle rollover in spraying operation can be realized, and by the upright positioning of the upper frame (13b), protection of the driver (D) during vehicle rollover in normal running of the speed sprayer (100) can be realized.

[0008] Here, when the upper frame (13b) is rotatable rearward with respect to the lower frame (13a) and movable to a rear-tilt position where it is located above the chemical liquid tank (6), by rotating and rear-tilting the upper frame (13b) with respect to the lower frame (13a), for example, the speed sprayer (100) can be easily stored in a warehouse, tent, etc., and the boarding and alighting performance of the driver (D) with respect to the seat (5) can be improved.

[0009] Further, a lock pin hole (13n) into which a lock pin (13m) is inserted is formed in the lower part of the upper frame (13b), and in the lower frame (13a), on the rotation locus of the lock pin hole (13n) with the rotation fulcrum of the upper frame (13b) as the fulcrum, a bracket (13i) having position holes (13p, 13q, 13r, 13s) into which the lock pin (13m) can be inserted and removed at positions corresponding to the positions is connected. When the lock pin (13m) inserted into the lock pin hole (13n) is inserted into the position holes (13p, 13q, 13r, 13s) corresponding to the positions, the upper frame (13b) is locked in the corresponding position, and when the lock pin (13m) inserted into the lock pin hole (13n) is pulled out from the position holes (13p, 13q, 13r, 13s) corresponding to the positions, the upper frame (13b) is made rotatable with respect to the lower frame (13a) and movable to other positions. With an easy operation of inserting and removing the lock pin (13m) into and from the position holes (13p, 13q, 13r, 13s) of the bracket (13i) connected to the lower frame (13a), the upper frame (13b) can be rotated to a desired position and locked.

[0010] Also, when each of the lock pins (13m) located on the left and right in the vehicle left-right direction is configured to be inserted into and removed from the respective position holes (13p, 13q, 13r, 13s) from the same direction in the vehicle left-right direction, since the lock pin (13m) can be inserted and removed from one direction in the vehicle left-right direction, there is no need to reach around to the opposite side of the vehicle (1) to insert and remove the other lock pin (13m), and the workability can be improved.

[0011] Also, at the boundary between the upper frame (13b) and the connecting frame (13c), the portion on the side away from the seat (5) in the vehicle left - right direction is an inclined portion (13h) that slopes downward as it goes in the direction away from the seat (5) in the vehicle left - right direction with the upper frame (13b) in the upright position. When the upper frame (13b) is in the forward - tilted position where it is tilted forward, the inclined portion (13h) slopes from the front to the rear as it goes in the direction away from the seat (5) in the vehicle left - right direction. Therefore, during spraying travel, the inclined portion (13h) can easily deflect obstacles such as branches from the front to the rear.

[0012] Also, if the lower frame (13a) is connected on the fender (12) connected to the vehicle body frame (2), the protection frame (13) can be made more compact in the vehicle left - right direction.

Advantages of the Invention

[0013] Thus, according to the present invention, it is possible to protect the driver from obstacles such as branches from the front during spraying travel of the speed sprayer, protect the driver during vehicle rollover during spraying travel, and protect the driver during vehicle rollover during normal travel of the speed sprayer.

Brief Description of the Drawings

[0014]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

MODE FOR CARRYING OUT THE INVENTION

[0015] Hereinafter, a preferred embodiment of a speed sprayer equipped with a protective frame according to the present invention will be described with reference to the accompanying drawings. FIGS. 1 and 2 are perspective views showing a speed sprayer equipped with a protective frame according to an embodiment of the present invention, FIG. 3 is a front view showing the protective frame, FIG. 4 is a front view showing an enlarged view of a pivot connection portion and a lock portion on the right side of the vehicle of the protective frame, FIG. 5 is a perspective view showing an enlarged view of a pivot connection portion and a lock portion on the left side of the vehicle of the protective frame and a lock release state maintaining portion, FIG. 6 is a right side view showing the speed sprayer with the upper frame of the protective frame in an upright position, FIGS. 7 to 9 are views showing the speed sprayer with the upper frame in a forwardly inclined position, and FIGS. 10 and 11 are views showing the speed sprayer with the upper frame in a rearwardly inclined position. The speed sprayer of the present embodiment sprays a chemical solution while traveling in, for example, an orchard. In the following description, "front", "rear", "left", and "right" are directions based on the speed sprayer.

[0016] As shown in FIGS. 1 and 2, the speed sprayer 100 includes a self-propelled vehicle 1 on which a driver sits and performs driving operations. The vehicle 1 rotatably has front wheels 3 and rear wheels 4 on the left and right sides of a vehicle body frame (vehicle body) 2 extending in the vehicle front-rear direction.

[0017] In the vehicle 1 constituting the speed sprayer 100, in order from the front side to the rear side, there are a seat 5 on which the driver sits and performs driving operations using a steering wheel, chemical solution spraying operations, etc., a chemical solution tank 6 for storing the chemical solution, an engine room 7 for storing an engine as a drive source, a chemical solution pressure feed pump, etc., a nozzle head 8 for spraying the chemical solution pumped from the chemical solution tank 6 by driving the chemical solution pressure feed pump around the vehicle 1, and a blower 9 for sending the air sucked from the rear to the nozzle head 8.

[0018] The blower 9 is covered by a blower cover 10, and a plurality of spray nozzles 11 are arranged at intervals in an arc shape along the nozzle head 8 on the front side of the blower 9 so that the chemical solution is sprayed upward and laterally.

[0019] The vehicle body frame 2 includes a front frame that extends forward, and the seat 5 and the like are provided on this front frame. Fenders 12 that cover the front wheels 3 from above are connected to the vehicle body frame 2 at positions on both sides of the seat 5. As shown in FIGS. 1, 2, and 9, the seat 5 is arranged closer to the right side of the vehicle (the left side in the illustration of FIG. 9).

[0020] In this speed sprayer 100, as shown in FIGS. 1 to 3, it is arranged so as to sandwich the rear part side of the seat 5 from both sides in the vehicle left - right direction, forms a portal shape when viewed in the vehicle front - rear direction, and as shown in FIG. 6, a protective frame 13 is provided that extends above the head of the driver D sitting on the seat 5 and is configured to surround the driver D.

[0021] As shown in FIGS. 1 to 3, the protective frame 13 includes lower frames 13a that are respectively connected to and erected on the fenders 12 so as to sandwich the seat 5 from both sides in the vehicle left - right direction and extend upward, and portal frames 13x that are connected to the upper parts of the respective lower frames 13a and form a portal shape when viewed in the vehicle front - rear direction.

[0022] As described above, since the seat 5 is arranged closer to the right side of the vehicle (the left side in the illustrations of FIGS. 1 and 2), the lower frame 13a on the right side of the vehicle (the left side in the illustration of FIG. 3) is erected at a position closer to the seat 5 on the fender 12, and the lower frame 13a on the left side of the vehicle (the right side in the illustration of FIG. 3) is curved so as to protrude forward and is erected on the fender 12 that is separated from the seat 5 in the vehicle left - right direction and forward.

[0023] The portal frame 13x includes upper frames 13b that are connected to the upper parts of the respective lower frames 13a and extend upward, and a connecting frame 13c that connects the upper parts of the upper frames 13b.

[0024] The upper frame 13b on the right side of the vehicle (the left side shown in FIG. 3) and the connecting frame 13c are connected via a curved frame 13d, and the upper frame 13b on the left side of the vehicle (the right side shown in FIG. 3) and the connecting frame 13c are connected via a short curved frame 13e, a relatively long straight frame 13f, and a short curved frame 13g.

[0025] Therefore, the boundary portion between the upper frame 13b on the left side of the vehicle (the right side shown in FIG. 3) and the connecting frame 13c is an inclined portion 13h that inclines downward as it goes toward the left side of the vehicle (the right side shown in FIG. 3), which is a direction away from the seat 5 in the vehicle left-right direction.

[0026] These lower frames 13a, upper frames 13b, connecting frames 13c, curved frames 13d, curved frames 13e, straight frames 13f, and curved frames 13g are constituted by, for example, angle pipes which are square steel pipes for general structures, and are connected to each other by, for example, welding except for the connecting portions between the lower frames 13a and the upper frames 13b.

[0027] The upper frame 13b is rotatably connected to the lower frame 13a. Here, the rotational connection portion and the lock portion that connect the lower frame 13a and the upper frame 13b shown on the left and right in FIG. 3 have the same configuration as shown in FIG. 4, and on the left side of the vehicle (the right side shown in FIG. 3), although hidden in the figure, a lock release state maintaining portion as shown in FIG. 5 is provided (details will be described later).

[0028] As shown in FIGS. 3 to 5, flat plate-shaped brackets 13i having a substantially fan shape in a view in the vehicle left-right direction are respectively arranged on the upper left side of the vehicle of each of the lower frames 13a, and on the lower part of each of the upper frames 13b, U-shaped support portions 13j that are open downward are respectively provided so as to cover the upper end portions of the lower frames 13a and the brackets 13i from above.

[0029] The upper part of the lower frame 13a, the lower part of the bracket 13i, and the lower part of the support part 13j of the upper frame 13b are penetrated by a pin 13k. The lower part of the support part 13j of the upper frame 13b is supported rotatably with the pin 13k as a fulcrum on the upper part of the lower frame 13a, and a rotation connection part is constituted. In this state, the bracket 13i is fixed immovably to the upper part of the lower frame 13a.

[0030] On both sides of the U-shaped support part 13j that forms the lower part of the upper frame 13b, lock pin holes 13n, 13n into which a lock pin 13m can be inserted and removed are respectively formed. Further, in the bracket 13i, position holes 13p to 13s into which the lock pin 13m can be inserted and removed are opened on the rotation locus of the lock pin hole 13n of the support part 13j with the pin 13k as a rotation fulcrum (see FIGS. 6 and 8 for the position hole 13r).

[0031] As shown in FIGS. 5 and 6, the position hole 13p shown in FIGS. 5, 7, 8, 10, and 11 is for inserting the lock pin 13m when the upper frame 13b is set in the upright position upright upward, and is exclusively adopted during normal running.

[0032] As shown in FIGS. 7 and 8, the position hole 13q shown in FIGS. 5, 6, 10, and 11 is for inserting the lock pin 13m when the upper frame 13b is set in the forward tilt position tilted forward by a predetermined amount, and is exclusively adopted during spraying running.

[0033] As shown in FIGS. 10 and 11, the position hole 13r shown in FIGS. 6 to 8 is for inserting the lock pin 13m when the upper frame 13b is set in the rearward tilt position tilted rearward, and is exclusively adopted, for example, when storing in a warehouse or a tent.

[0034] As shown in FIGS. 5, 6, 10, and 11, the position hole 13s is for inserting the lock pin 13m when the upper frame 13b is set in the intermediate forward tilt position between the upright position and the forward tilt position.

[0035] As shown in FIGS. 4 and 5, on the tip side of the lock pin 13m, an E-ring 13t for positioning the lock pin 13m in the axial direction is fitted at a position inside the bracket 13i in the axial direction. A compression spring 13u is interposed between the side portion on the right side of the vehicle (the left side in the illustration of FIG. 4) of the U-shaped support portion 13j at the lower part of the upper frame 13b and the E-ring 13t so as to surround the lock pin 13m.

[0036] Then, due to the biasing force of the compression spring 13u, with the E-ring 13t in pressure contact with the bracket 13i, the lock pin 13m is inserted into any one of the position holes 13p to 13s of the bracket 13i and the lock pin hole 13n on the left side of the vehicle (the right side in the illustration of FIG. 4) of the U-shaped support portion 13j at the lower part of the upper frame 13b, whereby the upper frame 13b is locked in a position corresponding to any one of the position holes 13p to 13s. The lock portion is configured in this way.

[0037] In addition, a lock release state maintaining portion is provided in the lock portion on the left side of the vehicle (the right side in the illustration of FIG. 3). As shown in FIG. 5, this lock release state maintaining portion includes a single-character notch portion 13v provided so as to cross the lock pin hole 13n on the side portion on the right side of the vehicle (the left side in the illustration of FIG. 5) of the U-shaped support portion 13j at the lower part of the upper frame 13b, and a spring pin 13w driven in so as to penetrate the lock pin 13m in a direction orthogonal to the axial direction.

[0038] When the locking pin 13m is locked, the spring pin 13w is located within the notch 13v. Against the biasing force of the compression spring 13u, the locking pin 13m that has been pulled out from either the locking pin hole 13n or one of the position holes 13p - 13s on the side of the U-shaped support portion 13j at the lower part of the upper frame 13b on the left side of the vehicle (the right side in the illustration of FIG. 5) and unlocked is rotated to a position intersecting the notch 13v. As a result, the spring pin 13w is pressed against the side of the U-shaped support portion 13j on the right side of the vehicle (the left side in the illustration of FIG. 5) by the biasing force of the compression spring 13u, and the unlocked state is maintained.

[0039] According to the speed sprayer 100 configured as described above, during normal driving, as shown in FIGS. 5 and 6, the locking pin 13m is inserted into the position hole 13p, and the upper frame 13b is locked in an upright position standing vertically upward as shown in FIGS. 1 - 3 and 6. In this state, the speed sprayer 100 drives normally.

[0040] In this state, as shown in FIG. 6, a safety area S1 is formed below the virtual line VL1 connecting the upper part of the upright portal frame 13x and the upper part of the tip of the speed sprayer 100, ensuring the safety of the driver D sitting on the seat 5 and operating the vehicle during a rollover while driving normally.

[0041] That is, by positioning the upper frame 13b upright, protection of the driver D during a rollover of the vehicle while the speed sprayer 100 is driving normally can be achieved.

[0042] Here, when spraying and traveling, first, the driver D pulls the lock pin 13m on the left side of the vehicle (the right side in the illustration of FIG. 3) against the biasing force of the compression spring 13u (see FIG. 5), pulls it out from the lock pin hole 13n and the position hole 13p on the left side of the vehicle (the right side in the illustration of FIG. 5) of the support portion 13j, rotates the lock pin 13m pulled out from the position hole 13p and unlocked to a position intersecting the notch portion 13v, presses the spring pin 13w against the side portion on the right side of the vehicle (the left side in the illustration of FIG. 5) of the U-shaped support portion 13j, and maintains the unlocked state.

[0043] Next, the driver D pulls the lock pin 13m on the right side of the vehicle (the left side in the illustration of FIG. 3) against the biasing force of the compression spring 13u, pulls it out from the lock pin hole 13n and the position hole 13p on the left side of the support portion 13j to unlock it. In this state, the upper frame 13b is rotated forward with respect to the lower frame 13a. At this time, the tip of the lock pin 13m moves in contact with and sliding on the inner surface of the bracket 13i on the right side of the vehicle (the left side in the illustration of FIG. 3) due to the biasing force of the compression spring 13u.

[0044] As the upper frame 13b is tilted forward, when the lock pin 13m on the right side of the vehicle (the left side in the illustration of FIG. 3) reaches the position hole 13q (see FIG. 5) beyond the position hole 13s, the rotation of the upper frame 13b is stopped. Then, the lock pin 13m on the right side of the vehicle (the left side in the illustration of FIG. 3) is inserted into the position hole 13q and the lock pin hole 13n by the biasing force of the compression spring 13u, and the upper frame 13b on the right side of the vehicle is locked.

[0045] Next, the driver D rotates the lock pin 13m on the left side of the vehicle (the right side in the illustration of FIG. 3), and referring to FIG. 5, releases the hand from the lock pin 13m on the left side of the vehicle with the spring pin 13w aligned with the notch portion 13v. Then, the lock pin 13m on the left side of the vehicle is inserted into the position hole 13q and the lock pin hole 13n by the biasing force of the compression spring 13u, and the upper frame 13b on the left side of the vehicle is locked. At this time, the spring pin 13w is located within the notch portion 13v.

[0046] This state is the forward tilt position of the upper frame 13b, as shown in FIGS. 7 and 8. In this state, as shown in FIG. 9, in plan view, the connecting frame 13c is located in front of the front end of the seat 5. Thus, the upper frame 13b is movable between an upright position and a forward tilt position.

[0047] In this forward tilt position, as shown in FIG. 8, a safety area S2 against obstacles such as branches from the front during spraying travel is formed behind the area surrounded by the forward tilted portal frame 13x, and the safety of the driver D sitting on the seat 5 and performing driving operations, such as the face portion generally below the nose, the neck, and the chest, is ensured.

[0048] In addition, during spraying travel, a safety area S3 during vehicle rollover is formed below an imaginary line VL2 connecting the upper part of the forward tilted portal frame 13x and the upper part of the tip of the speed sprayer 100, and below the area surrounded by the forward tilted portal frame 13x, and the safety of the driver D sitting on the seat 5 and performing driving operations during vehicle rollover during spraying travel is also ensured.

[0049] That is, by positioning the upper frame 13b in the forward tilt position, protection of the driver D against obstacles such as branches from the front during spraying travel of the speed sprayer 100 and protection of the driver D during vehicle rollover during spraying travel can be achieved.

[0050] Also, as shown in FIG. 9, at the boundary between the upper frame 13b and the connecting frame 13c, the portion on the side away from the seat 5 in the vehicle left - right direction, that is, the inclined portion 13h on the left side of the vehicle described above, in the state where the upper frame 13b is in the forward tilt position, is inclined from the front to the rear as it goes in the direction away from the seat 5 in the vehicle left - right direction (left side of the vehicle; right side in the illustration of FIG. 9). Therefore, during spraying travel, the inclined portion 13h can easily deflect obstacles such as branches from the front to the rear, as indicated by the arrow.

[0051] Here, when storing the speed sprayer 100 in, for example, a warehouse or a tent, the driver D unlocks the lock pin 13m on the left side of the vehicle (the right side shown in FIG. 3) and maintains the unlocked state, and then unlocks the lock pin 13m on the right side of the vehicle (the left side shown in FIG. 3) in the same manner as when tilting the upper frame 13b forward described above. Then, as shown in FIGS. 10 and 11, the driver D rotates the upper frame 13b with respect to the lower frame 13a and tilts it backward.

[0052] Next, when the lock pin 13m on the right side of the vehicle reaches the position hole 13r (see FIGS. 6 to 8), the driver D stops the rotation of the upper frame 13b, and inserts the lock pin 13m on the right side of the vehicle into the position hole 13r and the lock pin hole 13n by the biasing force of the compression spring 13u to lock the upper frame 13b on the right side of the vehicle. Also, the lock pin 13m on the left side of the vehicle is locked in the same manner as described above. Then, as shown in FIGS. 10 and 11, the upper frame 13b moves to the rear-tilt position located on the chemical liquid tank 6.

[0053] In this way, by tilting the upper frame 13b backward, the speed sprayer 100 can be easily stored in, for example, a warehouse or a tent. Also, the boarding and alighting performance of the driver D with respect to the seat 5 can be improved.

[0054] Further, according to the present embodiment, the following operations and effects are also achieved. That is, the lock pin 13m inserted into the lock pin hole 13n at the lower part of the upper frame 13b is inserted into any one of the position holes 13p to 13r provided in the bracket 13i at the upper part of the lower frame 13a, whereby the upper frame 13b is locked in any one of the corresponding upright position, forward tilt position, or rearward tilt position. When the lock pin 13m inserted into the lock pin hole 13n is pulled out from any one of the position holes 13p to 13r of the bracket 13i corresponding to the upright position, forward tilt position, or rearward tilt position, the upper frame 13b is made rotatable with respect to the lower frame 13a and movable to other positions. Therefore, by the easy operation of inserting and removing the lock pin 13m into and from the position holes 13p to 13r of the bracket 13i at the upper part of the lower frame 13a, the upper frame 13b can be rotated to a desired position and locked.

[0055] Also, since each of the lock pins 13m located on the left and right in the vehicle left - right direction can be inserted into and removed from the respective position holes 13p to 13r from the same direction (the right side of the vehicle) in the vehicle left - right direction, there is no need to reach around to the opposite side of the vehicle to insert and remove the other lock pin 13m, and the workability can be improved.

[0056] Further, since the lower frame 13a is connected to the fender 12 connected to the vehicle body frame 2, the compactification of the protective frame 13 in the vehicle left - right direction can be achieved.

[0057] Note that, for example, during spraying travel of the speed sprayer 100, if necessary, the lock pin 13m may be inserted into the position hole 13s to set an intermediate forward tilt position between the upright position and the forward tilt position.

[0058] As described above, the present invention has been specifically described based on its embodiments. However, the present invention is not limited to the above embodiments. For example, in the above embodiments, the protective frame 13 is preferably composed of square pipes, but it may also be, for example, round pipes, round bars, flat plates, etc. The key is that rigidity can be ensured.

[0059] Also, in the above embodiment, the nozzle head 8 and the blower 9 are arranged in this order from the front part to the rear part of the vehicle 1. The application of the speed sprayer 100 that sends air from the rear of the vehicle to the nozzle head 8 at the front by driving the blower 9 and sprays the chemical liquid from the nozzle head 8 around the vehicle 1 has been described. However, the blower 9, the nozzle head 8, and the nozzle plate can be arranged in this order from the front part to the rear part of the vehicle 1. By driving the blower 9, air can be sent from the front of the vehicle to the nozzle head 8 and the nozzle plate at the rear, and it can also be applied to the speed sprayer that sprays the chemical liquid from the nozzle head 8 and the nozzle plate around the vehicle 1.

Explanation of Reference Numerals

[0060] 1... Vehicle, 2... Body frame, 5... Seat, 6... Chemical liquid tank, 7... Engine room, 8... Nozzle head, 9... Blower, 11... Spray nozzle, 12... Fender, 13... Protective frame, 13a... Lower frame, 13b... Upper frame, 13c... Connecting frame, 13h... Inclined part, 13i... Bracket, 13m... Lock pin, 13n... Lock pin hole, 13p - 13s... Position holes, 13x... U-shaped frame, 100... Speed sprayer, D... Driver, S1, S2, S3... Safety areas.

Claims

1. From the front to the rear of the vehicle (1), there are provided, in this order, a seat (5) on which the driver (D) sits, a chemical liquid tank (6) storing a chemical liquid, and an engine room (7) storing a drive source. At the rear part, there are provided a nozzle head (8) having a plurality of spray nozzles (11) for spraying the chemical liquid, and a blower (9) for sending air to the nozzle head (8) from the front-rear direction of the vehicle. While running by the operation of the driver (D) sitting on the seat (5), air is blown from the blower (9) to the nozzle head (8), and the chemical liquid from the spray nozzles (11) is applied to a speed sprayer (100) that sprays the chemical liquid around the vehicle (1). A protective frame (13) that secures a safety area (S1, S2, S3) for the driver (D) sitting on the seat (5), a lower frame (13a) disposed so as to sandwich the rear side of the seat (5) from both sides in the left-right direction of the vehicle and extending upward, and a portal frame (13x) connected to the upper part of each of the lower frames (13a) and forming a portal shape when viewed in the front-rear direction of the vehicle, The portal frame (13x) includes an upper frame (13b) connected to the upper part of each of the lower frames (13a) and extending upward, and a connecting frame (13c) connecting the upper parts of the upper frames (13b), The upper frame (13b) is rotatably connected to the lower frame (13a), and is movable between an upright position perpendicular to the lower frame (13a) and a forward-tilted position where it rotates forward from the upright position and the connecting frame (13c) is located in front of the front end of the seat (5) in a plan view, A lock pin hole (13n) into which a lock pin (13m) is inserted is formed in the lower part of the upper frame (13b), On the lower frame (13a), a bracket (13i) having position holes (13p, 13q, 13r, 13s) into and from which the lock pin (13m) can be inserted and removed is connected at positions corresponding to the positions on the rotation locus of the lock pin hole (13n) with the rotation fulcrum of the upper frame (13b) as the fulcrum, When the lock pin (13m) inserted into the lock pin hole (13n) is inserted into the position holes (13p, 13q, 13r, 13s) corresponding to the position, the upper frame (13b) is locked in the corresponding position, When the lock pin (13m) inserted into the lock pin hole (13n) is pulled out from the position holes (13p, 13q, 13r, 13s) corresponding to the position, the upper frame (13b) is made rotatable with respect to the lower frame (13a) and movable to another position. The protection frame (13) of the speed sprayer (100) is characterized in that each of the lock pins (13m) located on the left and right in the vehicle left - right direction is inserted into and removed from the respective position holes (13p, 13q, 13r, 13s) from the same direction in the vehicle left - right direction.

2. The upper frame (13b) is characterized in that it is movable to a rear - tilted position where it rotates rearward with respect to the lower frame (13a), tilts backward, and is located above the chemical liquid tank (6), as claimed in claim 1, for the protection frame (13) of the speed sprayer (100).

3. At the boundary between the upper frame (13b) and the connecting frame (13c), the portion on the side away from the seat (5) in the vehicle left - right direction is an inclined portion (13h) that slopes downward as it goes in the direction away from the seat (5) in the vehicle left - right direction in a state where the upper frame (13b) is in the upright position, as claimed in claim 1 or 2, for the protection frame (13) of the speed sprayer (100).

4. The lower frame (13a) is characterized in that it is connected to a fender (12) connected to the vehicle body frame (2), as claimed in any one of claims 1 to 3, for the protection frame (13) of the speed sprayer (100).

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