Protective frame of speed sprayer and speed sprayer

Abstract

To protect a driver from an obstacle in the front during spraying and traveling, and protect a driver when a vehicle overturns.SOLUTION: During spraying and traveling of a speed sprayer 100, an upper frame 13b is rotated forward from an upright position and a connection frame 13c is inclined forward to a forward inclination position positioned in front of the front end of a seat 5 in plan view, thereby a safe region S2 for an obstacle such as a branch from the front during spraying and traveling is formed backward of a region surrounded by a portal frame 13x inclined forward, and safety of almost a face part lower than the nose, the neck and the chest of a driver D who sits on the seat 5 and drives and operates is secured. In addition, a safe region S3 when a vehicle overturns is formed below a region which is lower than a virtual line VL2 connecting the upper part of the portal frame 13x inclined forward and the upper part of the tip of the speed sprayer 100 and is surrounded by the portal frame 13x inclined forward, and safety when the vehicle overturns during spraying and traveling of a driver D who sits on the seat 5 and drives and operates is also secured.SELECTED DRAWING: Figure 8

Description

[Technical Field]

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

[0002] Conventionally, agricultural tractors have been known that are provided with a two-pillar safety frame on the rear of the vehicle body to protect the operator in the event of a rollover (see, for example, Patent Document 1). This two-pillar safety frame is erected on both the left and right sides of the vehicle behind the seat where the driver sits and operates the vehicle, and is gate-shaped when viewed from the front to the rear of the vehicle. This safety frame protects the driver in the event of a rollover, thereby improving the safety of tractor operation. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 01-136845 Summary of the Invention [Problem to be solved by the invention]

[0004] If such a tractor safety frame is applied as a protective frame to an agricultural vehicle, such as a speed sprayer without a cabin, while driving through an orchard, for example, spraying chemicals, obstacles such as branches may come from the front and hit the driver, mainly in the neck or chest, and improvements are required.

[0005] Therefore, the present invention aims to provide a protective frame for a speed sprayer that can protect the driver from obstacles such as branches from the front while the speed sprayer is spraying, and can also protect the driver in the event of the vehicle overturning while the speed sprayer is normally running. [Means for solving the problem]

[0006] The protective frame (13) of the speed sprayer (100) according to the present invention is applied to a speed sprayer (100) that includes, from the front to the rear of a vehicle (1), a seat (5) for a driver (D) to sit on, a chemical tank (6) that stores a chemical solution, and an engine room (7) that houses a drive source, in that order, and also includes, at the rear, a spray head (8) having a plurality of spray nozzles (11) for spraying the chemical solution, and a blower (9) that sends air to the spray head (8) from the front-to-rear direction of the vehicle, and that is operated by the driver (D) seated in the seat (5) while traveling, blows air from the blower (9) to the spray head (8), and sprays the chemical solution from the spray nozzles (11) around the vehicle (1), and the protective frame (13) ensures a safety area (S1, S2, S3) for the driver (D) seated in the seat (5), and the seat (5) The vehicle is characterized in that it comprises lower frames (13a) extending upward and arranged so as to sandwich the rear side from both the left and right sides of the vehicle, and portal frames (13x) connected to the upper parts of the lower frames (13a) and forming a portal shape when viewed in the longitudinal direction of the vehicle, the portal frames (13x) comprising upper frames (13b) connected to the upper parts of the lower frames (13a) and extending upward, and a connecting frame (13c) connecting the upper parts of the upper frames (13b) to each other, the upper frames (13b) being rotatably connected to the lower frames (13a) and movable between an upright position in which they are upright relative to the lower frames (13a), and a forward-leaning position in which they are rotated forward from the upright position and tilted forward so that the connecting frame (13c) is positioned forward of the front end of the seat (5) in a plan view.

[0007] With this protective frame (13) of the speed sprayer (100), when the speed sprayer (100) is operating normally, the upper frame (13b) is raised to an upright position, thereby forming a safety area (S1) in the event of a vehicle rollover below an imaginary line (VL1) connecting the top of the upright gate-shaped frame (13x) and the top of the tip of the speed sprayer (100), thereby ensuring the safety of the driver (D) seated in the seat (5) and operating the vehicle in the event of a vehicle rollover during normal operation. On the other hand, when the speed sprayer (100) is traveling to spray, the upper frame (13b) is rotated forward from the upright position and tilted forward to a forward-leaning position in which the connecting frame (13c) is positioned forward of the front end of the seat (5) in a plan view. This forms a safety area (S2) behind the area surrounded by the forward-leaning gate-shaped frame (13x) to protect against obstacles such as branches from the front while traveling to spray, ensuring the safety of the face, neck, chest, etc. of the driver (D) seated in the seat (5) and operating the vehicle. In addition, while the speed sprayer (100) is traveling to spray, a safety area (S3) in the event of vehicle rollover is formed below the imaginary line (VL2) connecting the top of the forward-leaning portal frame (13x) and the top of the tip of the speed sprayer (100), and below the area surrounded by the forward-leaning portal frame (13x), thereby ensuring the safety of the driver (D) seated in the seat (5) and operating the vehicle in the event of vehicle rollover while traveling to spray. In other words, the forward-leaning positioning of the upper frame (13b) can protect the driver (D) from obstacles such as branches coming from the front while the speed sprayer (100) is traveling to spray, and can protect the driver (D) in the event of vehicle rollover while traveling to spray, and the upright positioning of the upper frame (13b) can protect the driver (D) in the event of vehicle rollover while the speed sprayer (100) is traveling normally.

[0008] Here, if the upper frame (13b) can be rotated rearward relative to the lower frame (13a) and tilted backward to move to a rearward tilted position where it is positioned above the chemical solution tank (6), then by rotating and tilting the upper frame (13b) rearward relative to the lower frame (13a), the speed sprayer (100) can be easily stored in, for example, a warehouse or a tent, and the ease with which the driver (D) can get in and out of the seat (5) can be improved.

[0009] 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 a bracket (13i) having position holes (13p, 13q, 13r, 13s) into which the lock pin (13m) can be inserted and removed is connected to the lower frame (13a) on a rotation trajectory of the lock pin hole (13n) about the rotation fulcrum of the upper frame (13b). The lock pin (13m) inserted into the lock pin hole (13n) is inserted into the position hole (13p, 13q, 13r, 13s) corresponding to the position, thereby locking the upper frame (13b). ) are locked in the corresponding position, and the lock pin (13m) inserted into the lock pin hole (13n) is pulled out from the position hole (13p, 13q, 13r, 13s) corresponding to the position, thereby making the upper frame (13b) rotatable relative to the lower frame (13a) and movable to another position. Then, by a simple operation of inserting and removing the lock pin (13m) into the position hole (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] Furthermore, if each of the lock pins (13m) located on the left and right sides of the vehicle is configured to be inserted and removed from the respective position holes (13p, 13q, 13r, 13s) from the same left-right direction of the vehicle, the lock pins (13m) can be inserted and removed from one direction in the left-right direction of the vehicle, so there is no need to go around to the opposite side of the vehicle (1) to insert and remove the other lock pin (13m), thereby improving workability.

[0011] Furthermore, at the boundary between the upper frame (13b) and the connecting frame (13c), the part on the side away from the seat (5) in the left-right direction of the vehicle is configured as an inclined portion (13h) that slopes downward as it moves away from the seat (5) in the left-right direction of the vehicle when the upper frame (13b) is in an upright position. Therefore, when the upper frame (13b) is in a forward-leaning position, the inclined portion (13h) slopes from front to rear as it moves away from the seat (5) in the left-right direction of the vehicle. Therefore, during spraying driving, the inclined portion (13h) can easily deflect obstacles such as branches coming from the front to the rear.

[0012] Furthermore, when the lower frame (13a) is connected to the top of the fender (12) connected to the body frame (2), the protection frame (13) can be made compact in the left-right direction of the vehicle. [Effects of the Invention]

[0013] In this way, the present invention protects the driver from obstacles such as branches coming from the front while the speed sprayer is spraying, and also protects the driver in the event of the vehicle overturning while the speed sprayer is running normally. [Brief explanation of the drawings]

[0014] [Figure 1] 1 is a perspective view of a speed sprayer equipped with a protective frame according to an embodiment of the present invention, viewed from diagonally above the front right. [Figure 2] FIG. 2 is a perspective view of the speed sprayer shown in FIG. 1, seen from diagonally above the front left. [Figure 3] FIG. 3 is a front view showing the protection frame in FIGS. 1 and 2. [Figure 4] 4 is an enlarged front view showing a rotational connection portion and a lock portion on the vehicle right side of the protection frame in FIG. 3. [Figure 5] 4 is an enlarged perspective view showing a rotational connection portion, a locking portion, and an unlocked state maintaining portion on the left side of the vehicle of the protection frame in FIG. 3. FIG. [Figure 6] This is a right side view of the speed sprayer, showing the safety area in the event of a vehicle rollover when the speed sprayer is running normally with the upper frame of the protective frame in the upright position. [Figure 7] This is an oblique view of the speed sprayer when viewed from diagonally above the front right with the upper frame of the protective frame in a forward tilted position. [Figure 8] This is a right side view of the speed sprayer, showing the safety area against obstacles such as branches from the front and the safety area in the event of the vehicle overturning when the speed sprayer is spraying with the upper frame of the protective frame in a forward-leaning position. [Figure 9] This is a plan view of the speed sprayer to explain the state in which the upper frame of the protective frame is in a forward-leaning position while the speed sprayer is spraying, deflecting obstacles such as branches from the front. [Figure 10] This is an oblique view of the speed sprayer when viewed from above and to the front right with the upper frame of the protective frame in a rearward tilted position. [Figure 11] This is a right side view of the speed sprayer with the upper frame of the protective frame in a rearward tilted position. DETAILED DESCRIPTION OF THE INVENTION

[0015] A preferred embodiment of a speed sprayer equipped with a protective frame according to the present invention will now be described with reference to the accompanying drawings. Figs. 1 and 2 are perspective views of a speed sprayer equipped with a protective frame according to an embodiment of the present invention. Fig. 3 is a front view of the protective frame. Fig. 4 is a front view showing an enlarged view of the pivotal connection and locking portion of the protective frame on the right side of the vehicle. Fig. 5 is a perspective view showing an enlarged view of the pivotal connection, locking portion, and unlocked state maintaining portion of the protective frame on the left side of the vehicle. Fig. 6 is a right side view of 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 forward-inclined position. Figs. 10 and 11 are views showing the speed sprayer with the upper frame in a rearward-inclined position. The speed sprayer of this embodiment sprays chemicals while traveling, for example, through an orchard. In the following description, "front," "rear," "left," and "right" refer to directions relative to the speed sprayer.

[0016] As shown in Figures 1 and 2, the speed sprayer 100 comprises a self-propelled vehicle 1 in which a driver sits and operates the vehicle, and the vehicle 1 has a front wheel 3 and a rear wheel 4 on the left and right sides of a vehicle frame (vehicle body) 2 extending in the fore-and-aft direction of the vehicle, which are rotatable.

[0017] The vehicle 1 that makes up the speed sprayer 100 is equipped with, from front to rear, a seat 5 where the driver sits and drives the vehicle using the steering wheel and performs operations such as spraying the chemical solution, a chemical solution tank 6 for storing the chemical solution, an engine room 7 that houses the engine and chemical solution pressure pump that serve as the driving source, a spray head 8 for spraying the chemical solution that is pressurized from the chemical solution tank 6 by driving the chemical solution pressure pump around the vehicle 1, and a blower 9 for sending air sucked in from the rear to the spray head 8.

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

[0019] The body frame 2 includes a front frame extending forward, and the seat 5 and other components are provided on this front frame. Fenders 12 that cover the front wheels 3 from above are connected to the body frame 2 on both sides of the seat 5. As shown in Figures 1, 2 and 9, the seat 5 is located toward the right side of the vehicle (the left side in Figure 9).

[0020] As shown in Figures 1 to 3, this speed sprayer 100 is provided with a protective frame 13 that is arranged to sandwich the rear side of the seat 5 on both the left and right sides of the vehicle, and is gate-shaped when viewed from the front to back of the vehicle, and as shown in Figure 6, extends above the head of the driver D seated in the seat 5 and is configured to surround the driver D.

[0021] As shown in Figures 1 to 3, the protective frame 13 comprises lower frames 13a that are connected to the fenders 12, stand upright, and extend upward so as to sandwich the seat 5 from both the left and right sides of the vehicle, and gate-shaped frames 13x that are connected to the upper parts of the lower frames 13a and have a gate shape when viewed in the fore-and-aft direction of the vehicle.

[0022] As mentioned above, the seat 5 is located closer to the right side of the vehicle (the left side in Figures 1 and 2), and therefore the lower frame 13a on the right side of the vehicle (the left side in Figure 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 Figure 3) is curved to protrude forward and erected on the fender 12, which is further forward and in the left-right direction of the vehicle than the seat 5.

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

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

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

[0026] These lower frame 13a, upper frame 13b, connecting frame 13c, curved frame 13d, curved frame 13e, straight frame 13f and curved frame 13g are made of, for example, square pipes, which are general structural square steel pipes, and are connected to each other, for example, by welding, except for the connecting portion between lower frame 13a and upper frame 13b.

[0027] The upper frame 13b is rotatably connected to the lower frame 13a. The rotational connection portion and lock portion connecting 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 although hidden in the drawing, an unlocked state maintaining portion as shown in Fig. 5 is provided on the left side of the vehicle (the right side in Fig. 3) (details will be described later).

[0028] As shown in Figures 3 to 5, a flat bracket 13i that is approximately fan-shaped when viewed from the left to right of the vehicle is arranged on the left side of the vehicle (the right side in Figure 3) of the upper part of each lower frame 13a, and a U-shaped support portion 13j that is open downward is provided on the lower part of each upper frame 13b so as to cover the upper end of the lower frame 13a and the bracket 13i from above.

[0029] A pin 13k penetrates 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, and the lower part of the support part 13j of the upper frame 13b is rotatably supported on the upper part of the lower frame 13a with the pin 13k as a fulcrum, thereby forming a rotational connection. In this state, the bracket 13i is fixed immovably to the upper part of the lower frame 13a.

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

[0031] The position hole 13p shown in Figures 5, 7, 8, 10 and 11 is used exclusively during normal driving, and is where the lock pin 13m is inserted when the upper frame 13b is set to the upright position in which it is held upright vertically upward, as shown in Figures 5 and 6.

[0032] The position hole 13q shown in Figures 5, 6, 10 and 11 is used exclusively during spraying travel, and is where the lock pin 13m is inserted when the upper frame 13b is tilted forward to a predetermined position, as shown in Figures 7 and 8.

[0033] The position hole 13r shown in Figures 6 to 8 is used to insert a lock pin 13m when tilting the upper frame 13b backward as shown in Figures 10 and 11, and is used exclusively when storing the vehicle in a warehouse, tent, etc.

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

[0035] 4 and 5, an E-type retaining ring 13t for axial positioning of the lock pin 13m is fitted to the tip side of the lock pin 13m at a position axially inward from the bracket 13i. A compression spring 13u is interposed between the E-type retaining ring 13t and the side of the U-shaped support part 13j that forms the lower part of the upper frame 13b on the right side of the vehicle (the left side in FIG. 4) so ​​as to surround the lock pin 13m.

[0036] Then, with the E-type retaining ring 13t pressed against the bracket 13i by the biasing force of the compression spring 13u, the lock pin 13m is inserted into one of the position holes 13p to 13s of the bracket 13i and into the lock pin hole 13n on the left side of the vehicle (the right side in FIG. 4) of the U-shaped support part 13j that forms the lower part of the upper frame 13b, whereby the upper frame 13b is locked in a position corresponding to one of the position holes 13p to 13s. This is how the locking part is configured.

[0037] Furthermore, the locking section on the left side of the vehicle (the right side in FIG. 3) is provided with an unlocked state maintaining section. As shown in FIG. 5, this unlocked state maintaining section includes a straight notch 13v provided across lock pin hole 13n on the side of the vehicle right side (the left side in FIG. 5) of U-shaped support section 13j that forms the lower part of upper frame 13b, and a spring pin 13w driven through lock pin 13m in a direction perpendicular to the axial direction.

[0038] When the lock pin 13m is locked, the spring pin 13w is positioned within the notch 13v, and is pulled out from the lock pin hole 13n or one of the position holes 13p to 13s on the side of the U-shaped support portion 13j that forms the lower part of the upper frame 13b on the left side of the vehicle (right side in Figure 5) against the biasing force of the compression spring 13u. The unlocked lock pin 13m is then rotated to a position where it intersects with the notch 13v, and the biasing force of the compression spring 13u causes the spring pin 13w to press against the side of the U-shaped support portion 13j on the right side of the vehicle (left side in Figure 5), thereby maintaining the unlocked state.

[0039] In the speed sprayer 100 configured in this manner, during normal driving, the lock pin 13m is inserted into the position hole 13p as shown in Figures 5 and 6, and the upper frame 13b is positioned and locked in an upright position that stands vertically upward as shown in Figures 1 to 3 and 6. In this state, the speed sprayer 100 drives normally.

[0040] In this state, as shown in Figure 6, a safety area S1 in the event of vehicle rollover is formed below the imaginary line VL1 connecting the top of the upright gate-shaped frame 13x and the top of the tip of the speed sprayer 100, ensuring the safety of the driver D seated in the seat 5 and operating the vehicle in the event of vehicle rollover during normal driving.

[0041] That is, the upright positioning of the upper frame 13b can protect the driver D in the event of the vehicle overturning during normal driving of the speed sprayer 100.

[0042] Here, when driving to spray, the driver D first pulls the lock pin 13m on the left side of the vehicle (right side in Figure 3) against the spring force of the compression spring 13u (see Figure 5), pulls it out of the lock pin hole 13n and position hole 13p on the side of the left side of the vehicle (right side in Figure 5) of the support part 13j, rotates the unlocked lock pin 13m pulled out of the position hole 13p to a position where it intersects with the cutout part 13v, and presses the spring pin 13w against the side of the U-shaped support part 13j on the right side of the vehicle (left side in Figure 5), maintaining the unlocked state.

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

[0044] When the upper frame 13b is tilted forward and the lock pin 13m on the right side of the vehicle (left side in FIG. 3) passes through the position hole 13s and reaches the position hole 13q (see FIG. 5), the rotation of the upper frame 13b is stopped. Then, the lock pin 13m on the right side of the vehicle (left side in 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, driver D rotates lock pin 13m on the left side of the vehicle (the right side in FIG. 3) and, referring to FIG. 5, releases lock pin 13m on the left side of the vehicle with spring pin 13w aligned with notch 13v. Then, due to the biasing force of compression spring 13u, lock pin 13m on the left side of the vehicle is inserted into position hole 13q and lock pin hole 13n, and upper frame 13b on the left side of the vehicle is locked. At this time, spring pin 13w is positioned within notch 13v.

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

[0047] In this forward-leaning position, as shown in Figure 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-leaning gate-shaped frame 13x, ensuring the safety of the face, neck, chest, etc. of the driver D sitting in the seat 5 and operating the vehicle.

[0048] In addition, during spraying, a safety area S3 in the event of vehicle rollover is formed below the imaginary line VL2 connecting the top of the forward-leaning gantry frame 13x and the top of the tip of the speed sprayer 100, and below the area surrounded by the forward-leaning gantry frame 13x, thereby ensuring the safety of the driver D, who is seated in the seat 5 and operating the vehicle, in the event of vehicle rollover during spraying.

[0049] In other words, the forward-leaning positioning of the upper frame 13b protects the driver D from obstacles such as branches coming from the front while the speed sprayer 100 is traveling to spray, and also protects the driver D in the event of the vehicle tipping over while traveling to spray.

[0050] Furthermore, as shown in Figure 9, the boundary between the upper frame 13b and the connecting frame 13c, the part on the side that is further away from the seat 5 in the left-right direction of the vehicle, i.e., the aforementioned inclined portion 13h on the left side of the vehicle, is inclined from front to rear as it moves away from the seat 5 in the left-right direction of the vehicle (left side of the vehicle; right side as shown in Figure 9) when the upper frame 13b is in a forward-leaning position.Therefore, during spraying driving, the inclined portion 13h can easily deflect obstacles such as branches from the front to the rear, as shown by the arrow.

[0051] When storing the speed sprayer 100 in, for example, a warehouse or tent, the driver D unlocks the lock pin 13m on the left side of the vehicle (the right side in FIG. 3) and, while maintaining the unlocked state, unlocks the lock pin 13m on the right side of the vehicle (the left side in FIG. 3), just as in the case of tilting the upper frame 13b forward as described above. Then, as shown in FIGS. 10 and 11, the driver D rotates the upper frame 13b relative to the lower frame 13a to tilt 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 using the biasing force of the compression spring 13u, thereby locking the upper frame 13b on the right side of the vehicle. The lock pin 13m on the left side of the vehicle is also locked in the same manner as described above. Then, the upper frame 13b moves to a rearward tilted position where it is positioned above the liquid chemical tank 6, as shown in FIGS. 10 and 11.

[0053] By tilting the upper frame 13b backward in this way, the speed sprayer 100 can be easily stored in, for example, a warehouse, a tent, etc. Furthermore, the ease with which the driver D can get in and out of the seat 5 can be improved.

[0054] The present embodiment also provides the following advantages and effects: When lock pin 13m inserted into lock pin hole 13n at the bottom of upper frame 13b is inserted into one of position holes 13p to 13r provided in bracket 13i at the top of lower frame 13a, upper frame 13b is locked in the corresponding upright position, forward-leaning position, or backward-leaning position, and when lock pin 13m inserted into lock pin hole 13n is pulled out of one of position holes 13p to 13r of bracket 13i corresponding to the upright position, forward-leaning position, or backward-leaning position, upper frame 13b becomes rotatable relative to lower frame 13a and can be moved to another position. Therefore, upper frame 13b can be rotated and locked at a desired position by the simple operation of inserting and removing lock pin 13m into and from position holes 13p to 13r of bracket 13i at the top of lower frame 13a.

[0055] Furthermore, each of the lock pins 13m located on the left and right sides of the vehicle can be inserted and removed from the respective position holes 13p to 13r from the same direction in the left and right direction of the vehicle (the right side of the vehicle), so there is no need to go around to the opposite side of the vehicle 1 to insert and remove the other lock pin 13m, improving workability.

[0056] Furthermore, since the lower frame 13a is connected onto the fender 12 which is connected to the body frame 2, the protection frame 13 can be made compact in the left-right direction of the vehicle.

[0057] In addition, when the speed sprayer 100 is traveling, for example, spraying, the lock pin 13m may be inserted into the position hole 13s as needed to set the speed sprayer 100 to an intermediate forward tilt position between the upright position and the forward tilt position.

[0058] The present invention has been specifically described above based on its embodiments, but the present invention is not limited to the above embodiments. For example, in the above embodiments, the protective frame 13 is made of square pipes, which is considered to be particularly suitable, but it may also be made of round pipes, round bars, flat plates, etc., as long as rigidity can be ensured.

[0059] In addition, in the above embodiment, the application to a speed sprayer 100 is described in which the spray head 8 and the blower 9 are arranged in this order from the front to the rear of the vehicle 1, and air is sent from the rear of the vehicle to the front spray head 8 by driving the blower 9, and the chemical solution is sprayed from the spray head 8 around the vehicle 1.However, the present invention can also be applied to a speed sprayer in which the blower 9, the spray head 8, and the spray head plate are arranged in this order from the front to the rear of the vehicle 1, and air is sent from the front to the rear spray head 8 and the spray head plate by driving the blower 9, and the chemical solution is sprayed around the vehicle 1 from the spray head 8 and the spray head plate. [Explanation of symbols]

[0060] 1...vehicle, 2...body frame, 5...seat, 6...chemical tank, 7...engine compartment, 8...spray head, 9...blower, 11...spray nozzle, 12...fender, 13...protective frame, 13a...lower frame, 13b...upper frame, 13c...connecting frame, 13h...inclined portion, 13i...bracket, 13m...lock pin, 13n...lock pin hole, 13p-13s...position hole, 13x...portrait frame, 100...speed sprayer, D...driver, S1, S2, S3...safety area.

Claims

1. A vehicle (1) is provided with, from the front to the rear, a seat (5) on which a driver (D) sits, a chemical tank (6) storing a chemical solution, and an engine room (7) storing a drive source, in that order, and at the rear, a spray head (8) having a plurality of spray nozzles (11) for spraying the chemical solution, and a blower (9) for sending air to the spray head (8) from the front-to-rear direction of the vehicle, the speed sprayer (100) being applied to a speed sprayer that, while traveling by operation of the driver (D) seated in the seat (5), sends air from the blower (9) to the spray head (8) and sprays the chemical solution from the spray nozzles (11) around the vehicle (1), and a protective frame (13) is provided to ensure a safety area (S1, S2, S3) for the driver (D) seated in 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; a portal frame (13x) connected to each upper portion of the lower frame (13a) and having a portal shape when viewed in the vehicle front-rear direction, The portal frame (13x) includes upper frames (13b) connected to the upper portions of the lower frames (13a) and extending upward; a connecting frame (13c) that connects 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 in which it stands upright relative to the lower frame (13a) and a forward-leaning position in which it rotates forward from the upright position and leans forward, so that the connecting frame (13c) is positioned forward of the front end of the seat (5) in a plan view; The protective frame (13) of the speed sprayer (100) has a boundary between the upper frame (13b) and the connecting frame (13c) that is located on the side away from the seat (5) in the left-right direction of the vehicle as an inclined portion (13h) including a linear frame (13f) that slopes downward as it moves away from the seat (5) in the left-right direction of the vehicle when the upper frame (13b) is in the upright position.

2. The inclined portion (13h) is The straight frame (13f), a curved first curved frame (13e) connecting one end of the straight frame (13f) and the upper frame (13b); a second curved frame (13g) connecting the other end of the straight frame (13f) and the connecting frame (13c); 2. The protective frame (13) of the speed sprayer (100) according to claim 1, wherein the straight frame (13f) is longer than the first curved frame (13e) and the second curved frame (13g).

3. A speed sprayer (100) comprising, from the front to the rear of a vehicle (1), a seat (5) on which a driver (D) sits, a chemical tank (6) storing a chemical solution, and an engine room (7) storing a drive source, in that order, and also comprising, at the rear, a spray head (8) having a plurality of spray nozzles (11) for spraying the chemical solution, and a blower (9) for sending air to the spray head (8) from the front-to-rear direction of the vehicle, and which, while traveling, is operated by the driver (D) seated in the seat (5), sends air from the blower (9) to the spray head (8) and sprays the chemical solution from the spray nozzles (11) around the vehicle (1), a protective frame (13) for securing a safety area (S1, S2, S3) for the driver (D) seated in the seat (5); The protective frame (13) includes a lower frame (13a) extending upward and disposed so as to sandwich the rear side of the seat (5) from both sides in the left-right direction of the vehicle; a portal frame (13x) connected to each upper portion of the lower frame (13a) and having a portal shape when viewed in the vehicle front-rear direction, The portal frame (13x) includes upper frames (13b) connected to the upper portions of the lower frames (13a) and extending upward; a connecting frame (13c) that connects 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 in which it stands upright relative to the lower frame (13a) and a forward-leaning position in which it rotates forward from the upright position and leans forward, so that the connecting frame (13c) is positioned forward of the front end of the seat (5) in a plan view; A speed sprayer (100) in which the boundary between the upper frame (13b) and the connecting frame (13c) on the side away from the seat (5) in the left-right direction of the vehicle is an inclined portion (13h) including a linear frame (13f) that slopes downward as it moves away from the seat (5) in the left-right direction of the vehicle when the upper frame (13b) is in the upright position.

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