JP2000153196A - Boom sprayer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To adjust the intervals of nozzles in the longitudinal direction of a boom appropriately in accordance with the spraying situation. SOLUTION: A nozzle pipe 19 is suspended from a boom 18 and extended along the boom 18. A plurality of fitting blocks 20 are fitted to the nozzle pipe 19 at equal intervals. A connection pipe 34 is bonded freely rotatably to the lower end part of each fitting block 20 around a vertical line (when the boom 18 is expanded horizontally). Nozzles 47 are fitted to both end parts of the connection pipe 34 and spray a spray liquid supplied from the nozzle pipe 19 through the connection pipe 34.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a boom sprayer that travels in a field or the like and sprays a spray liquid onto agricultural products or the like, and more particularly to a boom sprayer that can change the interval between nozzles in the longitudinal direction of the boom. .

[0002]

2. Description of the Related Art In a conventional boom sprayer, a nozzle pipe extends along the boom while being suspended from the boom.
The plurality of nozzles are fixed to the nozzle pipe at equal intervals.

[0003]

Problems to be Solved by the Invention 62-1835
No. 62 discloses a multi-headed hose in which nozzles are attached to the hose at appropriate intervals. Each nozzle must be attached to the hose at the position of the through hole so that the spray liquid is supplied from the through hole formed in the hose, and the nozzle pitch is fixed to the interval between the through holes of the hose. And change is difficult. Also in the conventional boom sprayer, the interval between nozzles (hereinafter, appropriately referred to as “pitch”) is fixed. Since the planting interval of the crop varies depending on the field, when the planting interval is different from the pitch of the nozzle, the spray liquid from the nozzle does not properly hit the crop, and the spraying efficiency is reduced.

[0004] It is an object of the present invention to provide a boom sprayer which can overcome the above problems.

[0005]

[Means for Solving the Problems]

The boom sprayer (10) of the present invention has the following (a) to (d). (A) A long body (19) suspended from the boom (18) and extending along the boom (18) (b) Provided on the long body (19) at appropriate intervals in the longitudinal direction of the long body (19) A plurality of rotary connecting portions (61) which are rotatably connected to each other around an axis perpendicular to the longitudinal direction of the elongated body (19). A shaft member (34) connected to the connecting portion (61) and extending in a direction perpendicular to the rotation axis (d) A nozzle (47) attached to both ends of the shaft member (34) and spraying the spray liquid

[0007] The elongated body (19) and the shaft-like member (34) are not limited to a nozzle pipe and a pipe body, respectively. That is, the spray liquid is not limited to being supplied through the long body (19) and the shaft-like member (34), but is supplied from the pump through a flexible pipe or the like (eg, a hose). The spray liquid may be supplied directly.

In a field, a boom sprayer (10)
When spraying the spray liquid from the nozzle (47), the boom (18)
The boom sprayer (10) expands to the left and right. boom
In the expanded state of (18), the shaft-like member (34) is rotatable around a predetermined straight line, for example, a vertical line, by the rotation connecting portion (61). Due to the change in the rotational position of the shaft member (34) around the rotary coupling portion (61), the interval between the nozzles (47) in the longitudinal direction of the elongated body (19) (hereinafter referred to as the "pitch of the nozzle (47)" Changes.) In this way, the pitch of the nozzles (47) is not fixed, but can be adjusted according to the spraying condition by changing the rotational position around the rotary joint (61).

According to the boom sprayer (10) of the present invention, the rotary connecting portions (61) are arranged at regular intervals in the longitudinal direction of the elongated body (19).

The shaft member (34) is perpendicular to the longitudinal direction of the elongated body (19), that is, the shaft member (34) is parallel to the running direction of the boom sprayer (10). At this time (FIG. 5), each pitch of the nozzles (47) is L. As the shaft member (34) rotates from a direction perpendicular to the longitudinal direction of the elongated body (19), the nozzles (47) at both ends of the shaft member (34)
Are separated from each other in the longitudinal direction of the elongated body (19). Thus, the nozzle
Not only make the pitch of (47) equal to L,
It can be changed as appropriate.

According to the boom sprayer (10) of the present invention, the shaft-shaped member (34) is pivotally connected at the center in the longitudinal direction.
(61) and the nozzles (4
The interval of 7) is set in the range of L / 2 to L.

The shaft member (34) is perpendicular to the longitudinal direction of the elongated body (19), that is, the shaft member (34) is parallel to the running direction of the boom sprayer (10). At this time (FIG. 5), each pitch of the nozzles (47) is L. As the shaft-like member (34) rotates from a direction perpendicular to the longitudinal direction of the elongated body (19), the length of the shaft-like member (34) adjacent to the elongated body (19) in the longitudinal direction is increased. The distance of the shaft member (34) closer to the longitudinal direction of the long body (19) decreases, and the longitudinal direction of the long body (19) for the nozzles (47) at both ends of each shaft member (34) decreases. Distance increases. At a predetermined rotational position of the shaft member (34) (FIGS. 6 and 7), each pitch of the nozzles (47) is L / 2. In this way, the equal pitch of the shaft member (34) can be freely switched between L and L / 2.

According to the boom sprayer (10) of the present invention, the length of the shaft member (34) is adjustable.

The length of the shaft member (34) can be adjusted by rotating
With respect to 1), only one side may be possible, or both sides may be possible. When the shaft member (34) is at an angle other than a right angle with respect to the boom (18), the nozzles (47) at both ends of the shaft member (34) are changed according to a change in the length of the shaft member (34). The position of the elongated body (19) in the longitudinal direction changes. Thus, adjustment of the rotational position of the shaft member (34), and the shaft member (34)
The pitch of the nozzle (47) can be adjusted as appropriate from both the adjustment of the length of the nozzle.

According to the boom sprayer (10) of the present invention, the nozzle (47) is attached to the shaft member (34) so that its direction can be adjusted.

The direction of each nozzle (47) is usually
It is considered downward as 2). However, in each shaft-shaped member (34), the orientation of one and the other is, for example, diagonally forward and diagonally backward with respect to immediately below, or diagonally left and diagonally right with respect to directly below,
Make them different. In this manner, the spray liquid is applied to the object to be sprayed (62) from various angles, so that the efficiency of spraying the spray liquid to the object to be sprayed (62) can be increased.

According to the boom sprayer (10) of the present invention, the elongated body (19) and the shaft member (34) are a nozzle pipe (19) and a pipe body (34), respectively, and each nozzle (47) Is supplied with a spray liquid from a nozzle pipe (19) via a pipe body (34).

[0018]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a side view of the boom sprayer 10 when the boom device 12 is stored. The boom sprayer 10 has a traveling vehicle 11 that is made freely movable by front, rear, left and right tires 15, and a boom device 12 that is provided at a front end of the traveling vehicle 11. Boom 18 of boom device 12
When retracted (FIG. 1), is closed to the standing position, and during work (FIG. 2), it expands to the left and right sides of the traveling vehicle 11 and becomes horizontal. The spray liquid tank 13 is disposed at the rear of the traveling vehicle 11 and stores a spray liquid such as a chemical solution or a fertilizer. An engine (not shown) that generates rotational power for the tires 15 is provided in a hood 14 at the front of the traveling vehicle 11, and a nozzle pipe that is driven by the engine to suck the spray liquid in the spray liquid tank 13 and 19
A pump (not shown) for discharging to (FIG. 2) is housed.

FIG. 2 is a front view when the boom sprayer 10 is performing a spraying operation in a field. Boom 18
Is horizontally extended to the left and right sides of the traveling vehicle 11, and the boom device
The spray liquid is sprayed downward as sprays 16 from the nozzles 47 (FIG. 3) arranged at regular intervals along 12.

FIG. 3 shows the boom in the boom sprayer 10.
FIG. 18 is a transverse sectional view of a predetermined position in a longitudinal direction of 18. The boom in FIG.
Numeral 18 is in the expanded position, and extends in the horizontal direction of the traveling vehicle 11, and the pair of nozzles 47 are arranged in the front-rear direction of the boom sprayer 10. Straight nozzle pipe
19 extends in parallel with the lower surface side of the boom 18 along the boom 18, and the spray liquid is pumped from a pump mounted on the traveling vehicle 11. The mounting block 20 includes an upper body 21 and a lower body 22 which are arranged at substantially equal intervals in the longitudinal direction of the nozzle pipe 19 and are joined to each other in the up-down direction. The upper body 21 and the lower body 22 are mounted on the outer periphery of the upper half and the lower half of the nozzle pipe 19, respectively. The stay 23 has an L-shaped cross section including a horizontal portion and an upright portion, and an upper end portion of the upright portion is fixed to a side portion of the boom 18 by a bolt 24,
The horizontal part is located directly below the boom 18. Two bolts
17 is an upper body 21 and a lower body 22 of the mounting block 20.
And the mounting block 20 is fixed to the lower surface side of the horizontal portion of the stay 23. Lower body 22
Is provided with a fitting portion that fits into the through hole of the nozzle pipe 19 from outside to inside of the nozzle pipe 19, an O-ring 29 is fitted to the outer peripheral base portion of the fitting portion, and the upper body 21 and the lower The body 22 is pressed against the outer peripheral surface of the nozzle pipe 19 by the tightening force of the body 22 to prevent liquid leakage. The lower portion of the lower body 22 is a small diameter portion 25, and the annular groove 27 is a small diameter portion 25.
It is formed on the periphery of the lower end of the nozzle, and communicates with the vertical hole 26 inside, and further communicates with the inside of the nozzle pipe 19 through the vertical hole 26.

The connecting pipe 34 has a boss portion 35 fitted to the peripheral portion of the small diameter portion 25 and a pipe portion 36 projecting at right angles to the boss portion 35 on both sides in the radial direction. Washer 37, small diameter part 25
While being mounted on both ends of the boss 35,
Is fitted to the lower end of the small-diameter portion 25 and tightens the boss 35 and the washer 37 to the step of the lower body 22 while allowing the rotation of the boss 35 with respect to the small-diameter portion 25. The passage 41 is formed in the pipe portion 36 and ensures communication with the annular groove 27 at any rotational position of the connecting pipe 34 with respect to the mounting block 20.
The nozzle 47 has a holding portion 48 attached to the end of the pipe portion 36,
A nozzle unit 49 for spraying the spray liquid from the passage 41 with the spray 16.

If the mounting structure of the holding portion 48 to the end of the conduit portion 36 employs a mounting structure of the boss portion 35 to the small-diameter portion 25, the direction of the nozzle 47 is changed to the axis of the conduit portion 36. Can be changed around. In this case, when the connecting pipe 34 extends in the front-rear direction of the boom sprayer 10,
By changing the rotation position of the nozzle 47 around 36, the nozzle 47
Of the boom sprayer 10 changes from right below. When the connecting pipe 34 extends in the left-right direction of the boom sprayer 10, the nozzle around the pipe 36
By changing the rotational position of 47, the direction of the nozzle 47 changes from directly below to the front-back direction of the boom sprayer 10.

FIG. 4 is a cross-sectional view of a structure that allows the length from the lower body 22 to the nozzle 47 to be adjustable. The distal end portion 53 of the conduit 36 has a male screw 55 in a range closer to the proximal side by a predetermined distance from the distal end. The fitting portion 54 is a holding portion of the nozzle 47.
48 is attached integrally, and the reduced diameter part 57 near the holding part 48
And a distant enlarged portion 56. The inner diameter of the reduced diameter portion 57 is equal to the outer diameter of the distal end portion 53, and the female screw 58 on the inner peripheral side of the enlarged diameter portion 56 is screwed with the male screw 55 of the distal end portion 53. Due to the rotation of the fitting portion 54 with respect to the distal end portion 53, the screwing position of the male screw 55 and the female screw 58 is moved, and the position of the nozzle 47 in the axial direction of the conduit 36 changes. The O-ring 59 is a fitting portion for the tip 53.
Prevents liquid leakage against relative rotation of 54. 4 can also be used as a structure for adjusting the direction of the nozzle 47.

FIG. 5 shows a state in which the connecting pipe 34 is perpendicular to the boom 18. The pivot point 61 is connected to the connecting pipe 34
, That is, the center axis of the lower body 22 of the mounting block 20, and are arranged at equal intervals L in the longitudinal direction of the boom 18. In FIG. 5 to FIG.
Are set in the range of L / 2 to L. The nozzles 47 on both sides of the connecting pipe 34 are located at overlapping positions in the longitudinal direction of the boom 18, and the pitches of the nozzles 47 in the longitudinal direction of the boom 18 are all L. When the crops 62 in the field are planted at L intervals in the left-right direction of the boom sprayer 10, the rotational position of the connecting pipe 34 is adjusted as shown in FIG.

FIG. 6 shows a state in which the connecting pipes 34 have been rotated by a predetermined angle in the same direction from the rotational position of FIG. All connecting pipes 34 are parallel to each other. At the rotational position of the connecting pipes 34 in FIG.
In the connection pipes 34 adjacent to each other in the longitudinal direction of the boom 18, the nozzles 47 closer to the longitudinal direction of the boom 18 also have a distance of L / 2 in the longitudinal direction of the boom 18. It has become. As a result, all the pitches of the nozzle 47 as a whole are L / 2. When the crops 62 in the field are planted at an interval of L / 2 in the horizontal direction of the boom sprayer 10, the rotational position of the connecting pipe 34 is adjusted as shown in FIG.

FIG. 7 shows a state in which the connection pipes 34 adjacent to each other in the longitudinal direction of the boom 18 are rotated by a predetermined angle in the opposite direction from the rotation position of FIG. The connecting pipes 34 in the adjacent relationship have rotation angles opposite to each other with the direction perpendicular to the boom 18 being 0 °, and are arranged in a “C” shape in plan view. The connecting pipes 34 which are alternately arranged in the longitudinal direction of the boom 18 are parallel to each other. The nozzles 47 at both ends of each connecting pipe 34 are at a distance of L / 2 in the longitudinal direction of the boom 18, and the connecting pipes 34 in a “C” -shaped relationship are closer to each other in the longitudinal direction of the boom 18. Nozzles 47 are also at a distance of L / 2 in the longitudinal direction of the boom 18. Thereby, as a whole nozzle 47,
Each pitch is L / 2.

FIG. 8 shows a nozzle suitable for spraying conditions when the interval between the crops 62 is different between the range of the ridge 63 and the range of the ridge passage 64.
47 shows the rotation position. The crops 62 are planted in two rows in the ridge 63, and the interval between the crops 62 in the longitudinal direction of the boom 18 is L1 between the crops 62 in the same ridge 63,
L2 (L2 and L1 are not equal) is between the crops 62 that are closer to each other in the adjacent ridges 63. On the other hand, the pivot point 61 is L1 + L in the longitudinal direction of the boom 18.
2 are arranged at equal intervals. And all connecting pipes
Numerals 34 are rotated by a predetermined angle equal to the same rotation direction from a direction perpendicular to the longitudinal direction of the boom 18 and rotated in the same direction, and are parallel to each other. The nozzles 47 at both ends of each connecting pipe 34 have a distance of L1 in the longitudinal direction of the boom 18,
Also, connecting pipes that are adjacent to each other in the longitudinal direction of the boom 18
Nozzle closer to the longitudinal direction of boom 18 between 34
47 are at a distance of L2 in the longitudinal direction of the boom 18. Thus, despite the existence of the furrow passage 64, the furrow 63
Arrange the nozzle 47 almost directly above the two rows of crops 62,
The spray liquid can be sprayed from each nozzle 47 to the crop 62 on the ridge 63 from the nozzle 47.

FIG. 9 illustrates the interval between the nozzles 47 in the longitudinal direction of the boom 18 when the length of the connecting pipe 34 is adjusted. In each connection pipe, the nozzle 47 on one side has a shorter distance from the pivot point 61 than the nozzle 47 on the other side. As a result, the nozzles 47 at both ends of each connecting pipe 34 boom
L3 distance in the longitudinal direction of 18, and boom
In the connection pipes 34 adjacent to each other in the longitudinal direction of the nozzle 18, nozzles 47 closer to the longitudinal direction of the boom 18 have a distance of L4 (L4 and L3 are not equal) in the longitudinal direction of the boom 18. ing. Thus, the pitch of the nozzles 47 alternates between L3 and L4 in the longitudinal direction of the boom 18 alternately.

[Brief description of the drawings]

FIG. 1 is a side view of a boom sprayer shown in a retracted state of a boom device.

FIG. 2 is a front view when a boom sprayer is performing a spraying operation in a field.

FIG. 3 is a cross-sectional view of the boom sprayer at a predetermined position in a longitudinal direction of the boom.

FIG. 4 is a cross-sectional view of a structure that allows the length from the lower body to the nozzle to be adjustable.

FIG. 5 is a diagram showing a state in which the connecting pipe is at right angles to the boom.

FIG. 6 is a diagram showing a state in which each connecting pipe is at a rotation position rotated by a predetermined angle in the same direction from the rotation position of FIG. 5;

7 is a view showing a state in which connecting pipes adjacent to each other in the longitudinal direction of the boom are rotated by a predetermined angle equal to each other in the opposite direction from the rotational position of FIG.

FIG. 8 is a diagram showing a rotation position of a nozzle suitable for spraying conditions when the interval between agricultural products is different between a ridge range and a ridge passage range.

FIG. 9 is a diagram exemplifying the interval between nozzles in the longitudinal direction of the boom when the length of the connecting pipe is adjusted.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Boom sprayer 18 Boom 19 Nozzle pipe (long body) 34 Connecting pipe (axial member pipe body) 47 Nozzle 61 Rotation point (rotation connection part) 62 Agricultural crop (spray target)

Claims (6)

[Claims] 1. An elongated body (19) suspended from a boom (18) and extending along the boom (18), (b) the elongated body (1)
9) a plurality of members which are provided on the elongated body (19) at appropriate intervals in the longitudinal direction and which connect the joined bodies so as to be rotatable around an axis perpendicular to the longitudinal direction of the elongated body (19). Rotating joints (6
1), (c) each of the rotary joints (6
An axial member connected to 1) and extending in a direction perpendicular to the rotation axis
(34) and (d) nozzles (47) attached to both ends of the shaft-shaped member (34) for spraying a spray liquid. 2. The elongate body (19), wherein:
The boom sprayer according to claim 1, wherein the boom sprayers are arranged at equal intervals in the longitudinal direction of the boom. 3. The shaft-shaped member (34) is connected to the rotation connection portion (61) at the center in the longitudinal direction, and the distance between the nozzles (47) at both ends of the shaft-shaped member (34) is L / L. The boom sprayer according to claim 2, wherein the boom sprayer is set within a range of 2 to L. 4. A boom sprayer according to claim 1, wherein said shaft-shaped member is adjustable in length. 5. The boom sprayer according to claim 1, wherein said nozzle (47) is attached to said shaft-shaped member (34) so that its direction can be adjusted. 6. The elongated body (19) and the shaft member (34) are a nozzle pipe (19) and a pipe body (34), respectively, and each of the nozzles (47) is connected to the nozzle pipe (19). ) From the conduit body
The boom sprayer according to any one of claims 1 to 5, wherein the spray liquid is supplied via (34).