Safety frame for chemical spray vehicle and chemical spray vehicle

Abstract

To provide a safety frame of a chemical spray vehicle that can secure a safety area, with a simple and compact structure.SOLUTION: A safety frame 6 is constituted of a seat mounting base 6a which is mounted on a recessed part 8a of a chemical tank 8 together with a seat 5, and a frame part 6b extending upward on the same plane from above a rear end part of the seat mounting base 6a, where a safety area for securing safety of a driver D is formed, at a side lower than a virtual line VL connecting an upper portion of the frame part 6b to an upper portion of a tip part of the chemical spray vehicle 100. This can secure a safer area with a simple and compact structure, in comparison with a safety frame made by a conventional technique in which a portal main frame is erected behind or beside the seat, a portal front part frame is erected in front of the seat, and upper parts at both sides in a lateral direction of a vehicle of the frames are connected to each other through respective upper frames.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a safety frame for a chemical spray vehicle. [Background technology]

[0002] Conventionally, boom sprayers have been known in which side booms on both sides of a vehicle are extended so that they are aligned with a center boom provided at the front of the vehicle, and the vehicle is self-propelled by a driver seated in the driver's seat while spraying chemical solution from multiple spray nozzles provided on the center boom and side booms.

[0003] With this boom sprayer, there is a risk of the boom sprayer rotating forward with the front wheels as a fulcrum and tipping over when entering a farm field, etc. For this reason, the boom sprayer has a safety area secured by a safety frame to protect the driver in the event of the vehicle tipping over with the front wheels as a fulcrum.

[0004] For example, in the following Patent Document 1, a gate-shaped main frame serving as a main pillar is erected on the floor above the vehicle body frame (machine frame) behind and to the side of the seats so as to straddle the chemical tank from the left and right direction of the vehicle, and a gate-shaped front frame is erected in front of the seats so as to be connected to the vehicle body frame, and the upper parts of the main frame on both left and right sides of the vehicle and the upper parts of the front frame on both left and right sides of the vehicle are connected by the respective upper frames to form a safety frame. The area surrounded by this safety frame is called the safety area. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2004-074094 A Summary of the Invention [Problem to be solved by the invention]

[0006] However, in the safety frame of the boom sprayer described in Patent Document 1, there is a demand for ensuring a safety area for the operator in the event of the vehicle tipping over with an even simpler and more compact configuration.

[0007] The present invention has been made to solve such problems, and aims to provide a safety frame for pesticide spraying vehicles, such as boom sprayers, that can ensure a safety area with a simple and compact configuration. [Means for solving the problem]

[0008] The safety frame (6) of the pesticide spraying vehicle (100) according to the present invention has a chemical liquid tank (8) for spraying mounted on a vehicle body frame (3), and a recess (8a) for accommodating a seat (5) on which a driver (D) sits is formed in the center of the upper front end of the chemical liquid tank (8), and the safety frame (6) of the pesticide spraying vehicle (100) ensures a safety area for the driver (D) seated in the seat (5) in the recess (8a) in the event of the vehicle tipping over. The safety frame (6) of the pesticide spraying vehicle (100) comprises a seat mounting base (6a) accommodated in the recess (8a) and sandwiched between the recess (8a) and the seat (5), and attached to the recess (8a) together with the seat (5), and a frame portion (6b) attached to the seat mounting base (6a). The frame portion (6b) is characterized in that it includes a first upright frame (6h) that is connected onto the rear end of the seat mounting base (6a) behind and to the side of the seat (5) and is accommodated so as to fit into the recess (8a) and extends upward, widening frames (6i) that are connected to the upper parts of the first upright frames (6h) and extend above the recess (8a) and the separation width between the opposing frames in the left-right direction of the vehicle widens as it extends upward, second upright frames (6j) that are connected to the upper parts of the widening frames (6i) and extend up to above the head of the driver (D), and an upper frame (6k) that connects the upper parts of the second upright frames (6j) together and extends in the left-right direction of the vehicle.

[0009] According to the safety frame (6) of the chemical spraying vehicle (100), the safety frame (6) is composed of a seat mounting base (6a) that is attached together with the seat (5) to the recess (8a) of the chemical tank (8), and a frame portion (6b) that extends upward from the rear end of the seat mounting base (6a) on the same plane, and a safety area that ensures the safety of the driver (D) is formed below an imaginary line (VL) that connects the upper part of the frame portion (6b) and the upper part of the front end of the chemical spraying vehicle (100). Therefore, a gate-shaped main frame is erected behind and to the sides of the seat, and a gate-shaped front frame is erected in front of the seat, and the upper parts of the main frame on both left and right sides of the vehicle and the upper parts of the front frame on both left and right sides of the vehicle are connected by the respective upper frames, and compared to the safety frame of the prior art in which the area surrounded by the frames is the safety area, the safety area can be ensured by the safety frame (6) of a simple and compact configuration. In addition, the first upright frame (6h) connected to the rear end of the seat mounting base (6a) is received in the recess (8a) so as to fit therein, thereby increasing the rigidity of the safety frame (6) and improving the ease of mounting. In addition, the safety frame (6) can be attached when the seat (5) is attached to the recess (8a), so assembly is easy. In addition, since the structure of the safety frame (6) is simple, even if the safety frame (6) needs to be repaired due to the vehicle tipping over, it is easy to do so. In addition, even if the seat mounting base (6a) is deformed due to the vehicle tipping over, the frame part (6b) is also displaced accordingly because the frame part (6b) is integrated with the seat mounting base (6a), so the amount of displacement of the relative safety space between the driver (D) and the safety frame (6) is small.

[0010] Here, if a lower frame (6g) is provided that extends in the left-right direction of the vehicle, is connected to the lower ends of the first upright frames (6h, 6h), and is connected onto the rear end of the seat mounting base (6a), the frame portion (6b) of the safety frame (6) is made into an annular frame portion (6b) of the lower frame (6g), the first upright frame (6h), the widening frame (6i), the second upright frame (6j), and the upper frame (6k), thereby making the structure more robust.

[0011] Furthermore, if the separation width (W1) between the second upright frames (6j, 6j) in the left-right direction of the vehicle is smaller than the left-right width (W2) of the liquid tank (8), the left-right width of the vehicle (1) can be narrowed and the vehicle can be made more compact, compared to the conventional technology in which the safety frame is positioned outside the liquid tank in the left-right direction of the vehicle.

[0012] In addition, the pesticide sprayer (100) is a boom sprayer equipped with a side boom (16) having a plurality of nozzles (18) for spraying pesticides, and the side boom (16) is folded when spraying pesticides is not being performed and is stored at the side of the vehicle frame (3) in a diagonally rear-upward position. As described above, the separation width (W1) between the second upright frames (6j, 6j) in the left-right direction of the vehicle is smaller than the left-right width (W2) of the pesticide tank (8), so that collision between the side boom (16) and the safety frame (6) can be reliably prevented when the side boom (16) is stored. Effect of the Invention

[0013] Thus, according to the present invention, a safety frame for a pesticide spraying vehicle can be provided that can ensure a safety area with a simple and compact configuration. [Brief description of the drawings]

[0014] [Figure 1] 1 is a perspective view showing a pesticide spraying vehicle equipped with a safety frame according to an embodiment of the present invention. [Diagram 2] FIG. 2 is a side view of the pesticide spraying vehicle shown in FIG. [Diagram 3] FIG. 2 is a front view of the pesticide spraying vehicle shown in FIG. [Figure 4] FIG. 4 is a perspective view showing a liquid chemical tank and a seat and a safety frame attached to the liquid chemical tank in FIGS. 1 to 3. [Diagram 5] FIG. 5 is an exploded perspective view of the liquid chemical tank, the seat, and the safety frame shown in FIG. [Figure 6] FIG. 5 is a perspective view showing the seat and the safety frame in FIG. 4. [Figure 7]FIG. 7 is a front view of the seat and safety frame shown in FIG. 6. [Figure 8] FIG. 7 is a side view of the seat and safety frame shown in FIG. 6. [Figure 9] FIG. 9 is an exploded perspective view of the seat and the safety frame shown in FIGS. 6 to 8. [Figure 10] FIG. 10 is a rear view showing the safety frame in FIGS. 6 to 9. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] A preferred embodiment of a pesticide spraying vehicle equipped with a safety frame according to the present invention will be described below with reference to the accompanying drawings. Figures 1 to 3 are views showing a pesticide spraying vehicle equipped with a safety frame according to an embodiment of the present invention, Figures 4 and 5 are views showing a pesticide tank, a seat, and a safety frame, Figures 6 to 9 are views showing the seat and safety frame, and Figure 10 is a rear view showing the safety frame. In this embodiment, the pesticide spraying vehicle is a boom sprayer that sprays pesticide liquid, for example, on crops while traveling in a field. In the following description, "front," "rear," "left," and "right" refer to directions based on the boom sprayer.

[0016] As shown in FIGS. 1 to 3, the boom sprayer 100 is a self-propelled type that is driven and operated by a driver D seated thereon, and includes a travellable vehicle 1 and a boom device 2 for spraying a chemical solution from the vehicle 1.

[0017] 1 and 2, the vehicle 1 is equipped with a generally rectangular body frame 3 that is long in the front-rear direction of the vehicle. A seat 5 for a driver D to sit on and operate the vehicle using a steering wheel 4 and to spray chemicals is provided on the front of the body frame 3, and a safety frame 6 is provided standing upward behind the seat 5 (described in detail later).

[0018] An engine room 7 that houses an engine, a chemical liquid pressure-feed pump, etc. is provided on the rear of the body frame 3. On the body frame 3, between the seat 5 and the engine room 7 and below the seat 5 connected thereto, a chemical liquid tank 8 that contains the chemical liquid to be sprayed from the boom device 2 is mounted.

[0019] A pair of front wheels 9 and a pair of rear wheels 10 are provided at the front and rear of the body frame 3 below both sides in the left-right direction of the vehicle. The front wheels 9 and rear wheels 10 rotate when driven by the engine. In this embodiment, the vehicle is four-wheel drive, so the front wheels 9 and rear wheels 10 rotate, but the vehicle may be front-wheel drive and rear-wheel drive. A step 11 is provided on the left side of the body frame 3 to allow for going up and down onto the body frame 3 (floor).

[0020] A pair of four-bar link mechanisms 12 serving as boom lifts are disposed in the left-right direction of the vehicle so as to extend forward on the vehicle body frame 3 in front of the seat 5. The boom device 2 is supported on the vehicle body frame 3 via the four-bar link mechanisms 12. When the four-bar link mechanism 12 is actuated by the extension and contraction of an electric hydraulic cylinder (actuator) 13 (see FIG. 2), a horizontal control device 14 (see FIGS. 1 and 3) connected to the front link of the four-bar link mechanism 12 rises and falls.

[0021] The boom device 2 includes the above-mentioned horizontal control device 14 connected to a front link extending in the up-down direction of the four-bar link mechanism 12, a center boom 15 swingably connected to the horizontal control device 14 and extending in the left-right direction of the vehicle, and, as shown in Figs. 1 to 3, a pair of side booms 16 rotatably connected to both ends of the center boom 15. The center boom 15 is supported by the horizontal control device 14 so as to be swingable like a pendulum in the left-right direction of the vehicle so as to be kept horizontal by gravity. In other words, the center boom 15 becomes horizontal by gravity in accordance with the horizontal control device 14. A locking device for arbitrarily stopping the horizontal control of the center boom 15 is attached to the horizontal control device 14.

[0022] Nozzle pipes 17 are attached along the center boom 15 and side booms 16, respectively, and each nozzle pipe 17 is provided with a plurality of spray nozzles 18 for spraying chemicals along the longitudinal direction. When spraying chemicals, the side booms 16 are rotated from the closed position shown in the figure to an open position in which they are in a straight line with the center boom 15.

[0023] The boom sprayer 100 is self-propelled by the engine while the chemical liquid pressure feed pump is driven, and the chemical liquid in the chemical liquid tank 8 is sprayed downward from the spray nozzle 18 via the nozzle pipe 17 of the center boom 15 and the side boom 16. When chemical liquid spraying is not being performed, the side boom 16 is rotated and folded to the closed position shown in the figure, and is stored to the side of the body frame 3 with the rear raised at an angle.

[0024] In this boom sprayer 100, as shown in Figures 1, 4 and 5, a recess 8a that is open forward and upward is formed in the center of the upper front end of the chemical tank 8, and the seat 5 and the lower side of the safety frame 6 are housed in this recess 8a.

[0025] The safety frame 6 is intended to protect the driver D seated in the seat 5, and as shown in Figures 6 to 10, comprises a seat mounting base 6a and a frame portion 6b connected to the rear end of the seat mounting base 6a and erected thereon.

[0026] The seat attachment base 6a is for attaching the seat 5 to the recess 8a of the liquid tank 8, and includes a base 6c and a seat attachment portion 6d.

[0027] 5, the base 6c is formed in a flat plate shape that generally matches the shape of the bottom of the recess 8a of the liquid tank 8. As shown in Fig. 5 and Fig. 9, the rear half of the base 6c is wide in the left-right direction of the vehicle and has a shape that can be accommodated in the recess 8a of the liquid tank 8.

[0028] As shown in Figures 6 to 10, the seat mounting part 6d is disposed on a base 6c. The seat mounting part 6d is attached to the base 6c so as to be rotatable in the up-down direction with its front end part as a fulcrum. As shown in Figure 9, male screws 6f for fixing the bottom part of the seat 5 are protruding from the front end part of the seat mounting part 6d at left and right positions in the left-right direction of the vehicle. Rubber bushes 6e for absorbing shocks when the seat 5 is rotated are protruding from both the left and right sides of the rear side of the seat mounting part 6d.

[0029] 6 to 10, the frame section 6b includes a lower frame 6g, a first upright frame 6h, a widening frame 6i, a second upright frame 6j, and an upper frame 6k. The lower frame 6g, the first upright frame 6h, the widening frame 6i, the second upright frame 6j, the upper frame 6k, and the curved frames connecting adjacent frames are made of, for example, round pipes, and are connected to each other by, for example, welding.

[0030] The lower frame 6g extends in the left-right direction of the vehicle and is slightly shorter than the width of the rear end of the base 6c of the seat mounting base 6a in the left-right direction of the vehicle.

[0031] The first upright frame 6h is connected to both ends of the lower frame 6g and extends vertically upward. The width of the first upright frame 6h in the left-right direction of the vehicle (the distance between the outer edges) is set so that the first upright frame 6h fits into the recess 8a of the liquid tank 8 (see FIG. 5).

[0032] The widening frames 6i are connected to the upper ends of the first upright frames 6h via curved frames and extend above the recesses 8a (see Figs. 3 and 4). These widening frames 6i are configured so that the separation width between the opposing frames in the left-right direction of the vehicle increases as they move upward, and is greater than the width of the recesses 8a in the left-right direction of the vehicle.

[0033] The second upright frames 6j are connected to the upper ends of the widening frames 6i via curved frames, and extend vertically upward.

[0034] The upper frame 6k extends in the left-right direction of the vehicle, and is connected to the upper ends of the second upright frames 6j via respective curved frames.

[0035] Then, as shown in Figures 5 to 9, the lower end portions of the lower frame 6g and the first upright frame 6h of the frame portion 6b are attached and fixed, for example by welding, onto the rear end portion of the base 6c of the seat mounting base 6a, thereby obtaining the safety frame 6.

[0036] Furthermore, as shown in Figures 5 and 9, the bottom of the seat 5 is fixed to the safety frame 6 by the male screw 6f of the seat mounting portion 6d, the first upright frame 6h of the frame portion 6b is accommodated so as to fit into the recess 8a of the chemical tank 8, and with the seat 5 rotated forward, the seat mounting base 6a is attached and fixed to the recess 8a of the chemical tank 8, for example, by a bolt (see Figure 4).

[0037] In this state, as shown in Figures 1 to 3, the safety frame 6 (frame portion 6b) is erected from the rear and side of the seat 5, extends above the head of the driver D seated in the seat 5, and is configured to surround the driver D from behind. That is, as shown in Figure 2, a safety area to ensure the safety of the driver D is defined below an imaginary line VL connecting the upper portion of the frame portion 6b of the safety frame 6 and the upper portion of the front end of the chemical spraying vehicle 100.

[0038] In addition, when viewed from the front-rear direction of the vehicle, as shown in FIG. 3, the separation width W1 in the left-right direction of the vehicle of the second upright frames 6j constituting the frame portion 6b of the safety frame 6 (the distance between the outer edges of the second upright frames 6j) is smaller than the width W2 in the left-right direction of the vehicle of the liquid tank 8.

[0039] A seat belt (not shown) is fastened to the seat 5, and the driver D is fixed to the seat 5 as one body.

[0040] Thus, according to this embodiment, the safety frame 6 that ensures the safety area (see FIG. 2) of the driver D seated on the seat 5 is composed of the seat mounting base 6a that is attached to the recess 8a of the chemical tank 8 together with the seat 5, and the frame portion 6b that extends upward from the rear end of the seat mounting base 6a on the same plane. Therefore, compared to the conventional safety frame in which a gate-shaped main frame is erected behind and to the side of the seat, and a gate-shaped front frame is erected in front of the seat, the upper parts of the main frame on both sides in the left and right direction of the vehicle and the upper parts of the front frame on both sides in the left and right direction of the vehicle are connected by the respective upper frames, and the area surrounded by the frames is the safety area, the safety frame 6 can ensure the safety area with a simple and compact configuration. In addition, the first upright frame 6h connected to the rear end of the seat mounting base 6a is accommodated so as to fit into the recess 8a, so that the rigidity of the safety frame 6 is increased and the mounting property is improved. In addition, since the safety frame 6 can be attached when the seat 5 is attached to the recess 8a, assembly is easy. In addition, since the structure of the safety frame 6 is simple, even if the safety frame 6 needs to be repaired due to the vehicle tipping over, the repair can be easily performed. Even if the seat mounting base 6a is deformed due to the vehicle tipping over, the frame portion 6b is also displaced accordingly because the frame portion 6b is integrated with the seat mounting base 6a, and the relative displacement of the safety space between the driver D and the safety frame 6 is small.

[0041] Furthermore, according to this embodiment, the safety frame 6 is provided with a lower frame 6g that extends in the left-right direction of the vehicle, is connected to the lower ends of the first upright frames 6h, 6h, and is connected onto the rear end of the seat mounting base 6a. Therefore, the frame portion 6b of the safety frame 6 is annular frame portion 6b made up of the lower frame 6g, the first upright frame 6h, the widening frame 6i, the second upright frame 6j, and the upper frame 6k, making the structure more robust.

[0042] Furthermore, since the separation width W1 between the second upright frames 6j, 6j in the left-right direction of the vehicle is smaller than the left-right width W2 of the liquid tank 8, the left-right width of the vehicle 1 can be narrower and more compact than in the conventional technology in which the safety frame is positioned outside the liquid tank in the left-right direction of the vehicle.

[0043] The side boom 16 has a plurality of spray nozzles 18 for spraying chemical solutions, and when chemical solution spraying is not being performed, the side boom 16 is folded up and stored at the side of the body frame 3 in a diagonally upward rearward position, and as described above, the separation width W1 in the left-right direction of the vehicle between the second upright frames 6j, 6j is smaller than the width W2 in the left-right direction of the vehicle of the chemical solution tank 8, so that it is possible to reliably prevent the side boom 16 and the safety frame 6 from colliding when the side boom 16 is stored. In the prior art, the safety frame was erected on the floor next to the chemical solution tank on the body frame, and so there was a risk of the side boom and the safety frame coming into contact when the side boom was stored.

[0044] Furthermore, according to this embodiment, the following actions and effects are also achieved. That is, as shown in Fig. 2, the frame portion 6b constituting the safety frame 6 extends from above the base 6c of the seat mounting base 6a (see Fig. 5), and therefore, as shown in Fig. 2, compared to the prior art in which the main frame constituting the safety frame extends upward from the floor on the vehicle body frame, it is shorter in the height direction by a difference H. Therefore, when an external force F acts on the upper part of the frame portion 6b when the vehicle overturns, the moment can be reduced by the difference H compared to the prior art.

[0045] The lower frame 6g is not essential and may be omitted if the rigidity of the seat mounting base 6a can be ensured.

[0046] Although the present invention has been specifically described above based on the embodiments thereof, the present invention is not limited to the above embodiments. For example, in the above embodiment, the frame portion 6b is formed from a round pipe, which is considered to be particularly suitable, but it may be formed from, for example, a round bar, a square pipe, or a flat plate, and the key is that rigidity can be ensured.

[0047] In addition, in the above embodiment, the side booms 16 are connected to both ends of the center boom 15, but the present invention can also be applied to a boom sprayer in which the side booms 16 are connected to only one end of the center boom 15.

[0048] The present invention can also be applied to a crawler-type boom sprayer that is rotatably mounted on a vehicle body frame that constitutes a vehicle and has a crawler looped between a drive wheel and an idler wheel that are spaced apart in the front-rear direction.The present invention can also be applied to a self-propelled speed sprayer that uses air from a blower to spray a chemical solution from a spray nozzle around the vehicle while traveling, in other words, to a chemical spraying vehicle. [Explanation of symbols]

[0049] 3...vehicle frame, 5...seat, 6...safety frame, 6a...seat mounting base, 6b...frame section, 6g...lower frame, 6h...first upright frame, 6i...widening frame, 6j...second upright frame, 6k...upper frame, 8...chemical tank, 8a...recess, 16...side boom, 18...nozzle, 100...boom sprayer (chemical spraying vehicle), D...driver, W1...clearance width, W2...vehicle left-right width.

Claims

1. A chemical spraying vehicle (100) has a chemical spray tank (8) mounted on a vehicle body frame (3), and a recess (8a) for accommodating a seat (5) on which a driver (D) sits is formed in the center of the upper front end of the chemical spraying vehicle (8), and a safety area is secured for the driver (D) seated in the seat (5) within the recess (8a) in the event of the vehicle tipping over. a seat mounting base (6a) that is accommodated in the recess (8a) and sandwiched between the recess (8a) and the seat (5), supports the seat (5), and is attached to the chemical liquid tank (8) at the position of the recess (8a); and a frame portion (6b) that is attached to the seat mounting base (6a), The frame portion (6b) is a first upright frame (6h) connected to the rear end of the seat mounting base (6a) at the rear and side of the seat (5) and received in the recess (8a) so as to fit therein and extend upward; widening frames (6i) each connected to an upper portion of the first upright frames (6h) and extending above the recessed portion (8a), the width of the space between the frames being opposed to each other in the left-right direction of the vehicle increasing upward; A second upright frame (6j) is connected to the upper part of each of the widening frames (6i) and extends above the head of the driver (D); A safety frame (6) for a pesticide spraying vehicle (100), comprising: an upper frame (6k) that connects the upper portions of the second upright frames (6j) and extends in the left-right direction of the vehicle.

2. A chemical spraying vehicle (100) has a chemical spray tank (8) mounted on a vehicle body frame (3), and a recess (8a) is formed in the center of the upper front end of the chemical spray tank (8) to accommodate a seat (5) on which a driver (D) sits, the recess (8a) being defined by a bottom, left and right sides and a rear, and a safety area is ensured for the driver (D) seated in the seat (5) within the recess (8a) in the event of the vehicle tipping over. a plate-shaped seat mounting base (6a) that is accommodated in the recess (8a) and sandwiched between the bottom of the recess (8a) and the seat (5), supports the seat (5) and is attached to the bottom of the recess (8a), and a frame portion (6b) that is attached to the seat mounting base (6a); The frame portion (6b) is a first upright frame (6h) connected to the rear end of the seat mounting base (6a) at the rear and side of the seat (5) and received in the recess (8a) so as to fit therein and extend upward; widening frames (6i) each connected to an upper portion of the first upright frames (6h) and extending above the recessed portion (8a), the width of the space between the frames being opposed to each other in the left-right direction of the vehicle increasing upward; A second upright frame (6j) is connected to the upper part of each of the widening frames (6i) and extends above the head of the driver (D); A safety frame (6) for a pesticide spraying vehicle (100), comprising: an upper frame (6k) that connects the upper portions of the second upright frames (6j) and extends in the left-right direction of the vehicle.

3. A chemical spraying vehicle (100) has a chemical spray tank (8) mounted on a vehicle body frame (3), and a recess (8a) for accommodating a seat (5) on which a driver (D) sits is formed in the center of the upper front end of the chemical spraying vehicle (8), and a safety area is secured for the driver (D) seated in the seat (5) within the recess (8a) in the event of the vehicle tipping over. a seat mounting base (6a) that is accommodated in the recess (8a) and sandwiched between the recess (8a) and the seat (5) and that is attached to the recess (8a) together with the seat (5), and a frame portion (6b) that is attached to the seat mounting base (6a), The frame portion (6b) is a first upright frame (6h) connected to the rear end of the seat mounting base (6a) at the rear and side of the seat (5) and received in the recess (8a) so as to fit therein and extend upward; widening frames (6i) each connected to an upper portion of the first upright frames (6h) and extending above the recessed portion (8a), the width of the space between the frames being opposed to each other in the left-right direction of the vehicle increasing upward; A second upright frame (6j) is connected to the upper part of each of the widening frames (6i) and extends above the head of the driver (D); an upper frame (6k) that connects upper portions of the second upright frames (6j) to each other and extends in the left-right direction of the vehicle; A safety frame (6) for a pesticide spraying vehicle (100), characterized in that it comprises a lower frame (6g) extending in the left-right direction of the vehicle, connected to the lower ends of the first upright frames (6h, 6h), and connected onto the rear end of the seat mounting base (6a).

4. A safety frame (6) for a pesticide spraying vehicle (100) as described in claim 1 or 2, characterized in that it is provided with a lower frame (6g) extending in the left-right direction of the vehicle, connected to the lower ends of the first upright frames (6h, 6h), and connected onto the rear end of the seat mounting base (6a).

5. A safety frame (6) for a pesticide spraying vehicle (100) as described in any one of claims 1 to 4, characterized in that the separation width (W1) between the second upright frames (6j, 6j) in the left-right direction of the vehicle is smaller than the left-right width (W2) of the pesticide tank (8).

6. The chemical spray vehicle (100) is a boom sprayer, The boom sprayer includes a side boom (16) having a plurality of nozzles (18) for spraying a chemical solution, The safety frame (6) of a pesticide spraying vehicle (100) as described in claim 5, characterized in that the side boom (16) is folded when spraying of pesticide is not being performed and stored in a diagonally rear-upward position on the side of the vehicle frame (3).

7. A pesticide spraying vehicle (100) equipped with the safety frame (6) described in any one of claims 1 to 6.

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