JPH1052208A - Boom sprayer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a boom sprayer capable of smoothly carrying out the expanding and housing operations of a nozzle boom and attaining the operations by a simple and small structure. SOLUTION: This boom sprayer comprises a nozzle boom 12 having an end rotatably connected through a horizontal shaft to a base and a power cylinder 24 which is linked to the nozzle boom 12 and rocks the nozzle boom between an inverted position extending in the horizontal direction and a standing position extending in the vertical direction. The tip end of an expansion and contraction rod 26 of the power cylinder 24 is linked to an arm 34 laid at the base part of the nozzle boom 12. The arm 34 has an upwardly projecting shape when the nozzle boom 12 is in the inverted position. The power cylinder 24 is extended in the horizontal direction and the axis of the power cylinder is arranged approximately in accord with a straight line connecting a connecting point 36 when the nozzle boom 12 is at the standing position to the connecting point 36 when the nozzle boom 12 is at the inverted position and the base part of the power cylinder 24 is rockingly fixed to the base.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a golf course, a farm, etc.
The present invention relates to a boom sprayer mainly used for spraying liquid drugs, fertilizers, and the like.

[0002]

2. Description of the Related Art Conventionally, a boom sprayer has been used.
2. Description of the Related Art There is known an apparatus for spraying chemicals, fertilizer, and the like on a golf course, a farm, or the like while driving a work vehicle. The boom sprayer has a work vehicle mounted with a liquid tank containing a liquid such as a chemical or a fertilizer. A pair of left and right nozzle booms extending in the horizontal direction are provided on both left and right sides of the rear part of the work vehicle, and each nozzle boom has a plurality of nozzles along a longitudinal direction, and a large area of liquid can be obtained by one run. Can be sprayed on. On the other hand, when the spraying of the liquid is not performed, the nozzle boom can be stored in the vertical direction as viewed from the rear of the work vehicle so as not to be in the way. With the worker on the work body,
The nozzle boom can be deployed to the lying position by remote control,
As a boom sprayer provided with an automatic boom folding device that can be stored in an upright position, for example, there is a device disclosed in Japanese Utility Model Laid-Open No. 6-45476 by the present applicant. The boom sprayer according to this invention is:
Nozzle boom (4) having a base end rotatably connected to a base (frame 17) via a horizontal shaft (fulcrum 6)
And a power cylinder (7) connected to the nozzle boom (4) and swinging the nozzle boom (4) between a laterally extending lying position and a vertically extending standing position. A spring (11) is provided to pull the base end of the power cylinder (7) upward in order to urge the nozzle boom (4) against the ground via the power cylinder (7). . Further, in order to assist the nozzle boom (4) to be moved to a standing position by the power cylinder (7), the nozzle boom (4)
A boom tension spring (12) is provided for pulling in a direction in which the boom is raised.

[0003]

However, the conventional boom sprayer utilizes the expansion and contraction of a telescopic rod of a power cylinder and the spring force of a tension spring. The tension force of the tension springs (12) and (11) acts on the cylinder (7), and as the size of the nozzle boom (4) increases, a power cylinder having a larger force must be used. Furthermore, since it is constituted by a combination of a power cylinder and a plurality of springs, there is a disadvantage that the structure of the device is complicated. Therefore, the present invention
It is an object of the present invention to provide a boom sprayer that can smoothly perform the operation of deploying and storing the nozzle boom and achieve the operation with a simple and small structure.

[0004]

SUMMARY OF THE INVENTION The present invention achieves the above-mentioned object by a mechanism having only a link which basically does not use a spring, which is completely different from the above-mentioned conventional apparatus in which a power cylinder and a spring are combined. The present invention includes a nozzle boom 12 having a base end rotatably connected to a base 14 via a horizontal shaft 18, and a falling position connected to the nozzle boom 12 and extending the nozzle boom 12 in a lateral direction. And a power cylinder 24 that swings between a vertical position and a standing position extending in the vertical direction, wherein the distal end of the telescopic rod 26 of the power cylinder 24 is provided at the base end of the nozzle boom 12. 34, the arm 34 has a shape protruding upward when the nozzle boom 12 is in the down position, the power cylinder 24 extends in the lateral direction,
Further, the axis is arranged so as to substantially coincide with a straight line XX connecting the connection point 26 when the nozzle boom 12 is in the upright position and the connection point 26 when the nozzle boom 12 is in the down position. The base end of the power cylinder 24 is swingably attached to the base 14.

The nozzle boom 12 according to the present invention is rotatable about the horizontal axis 18 with respect to the base 14, and is connected to the arm 34 of the nozzle boom 12 at the connection point 36. The power cylinder 24 swings between the falling position and the standing position by the telescopic rod 26. During this time, the connection point 36 at the tip of the telescopic rod 26 moves between a protruding position and a retracted position while drawing an arc around the horizontal axis 18,
The power cylinder 24 swings with respect to the base 14. The power cylinder 24 is arranged in the lateral direction, so that the direction of action of the force provided by the telescopic rod 26 is also in the lateral direction. The nozzle boom 12
Is located at the horizontal position, and when the movable point is to be moved toward the upright position, the connecting point 36, which is the point of application of the force by the telescopic rod 26, is connected to the horizontal axis 18 passing through the horizontal axis 18 (the origin of the moment). , The lateral force of the telescopic rod 26 increases the tangential component of the arc in the tangential direction of the arc, thus giving a greater moment to the nozzle boom 12. . Therefore, a smooth rise of the storing operation of the nozzle boom 12 can be obtained. Further, an axis of the power cylinder 24 is connected to a straight line XX connecting the connection point 36 when the nozzle boom 12 is at the upright position and the connection point 36 when the nozzle boom 12 is at the falling position. They are arranged to almost match. Thereby, the direction of action of the force of the telescopic rod 26 can be directed to the average direction of the tangent of the arc over the entire stroke between the lying position and the vertical position. Make the most of the force in the direction
A large moment can be generated around the horizontal axis 18. With the configuration using the link of the present invention, the nozzle boom 12 can be smoothly moved with a simple structure. The power cylinder 2
Since the power of No. 4 can be used efficiently, a small power cylinder can be used, and since the power cylinder 24 is arranged in the lateral direction, the entire mechanism can be reduced in size.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS As an embodiment of the present invention, the power cylinder 24 is attached to the base 14 via a swingable link member 40, and the nozzle boom 12 is provided at a distance from the ground. Interval holding means 22 for holding
Having. The telescopic rod 2 of the power cylinder 24
6 protrudes, the nozzle boom 12 moves to the lying position, and the spacing means 22 contacts the ground. When the boom sprayer 2 is run on the undulating ground in a state where the nozzle boom 12 is laid down, the nozzle boom 1 is moved by the spacing means 22.
2 oscillates along the ups and downs of the ground while the distance from the ground is kept constant. When the nozzle boom 12 swings, the swingable link member 40 is connected to the power cylinder 24.
It is absorbed by giving escape to the base end of the. Further, according to another embodiment of the present invention, the link member 40 is configured to restrict the movement of the power cylinder 24 due to the swing of the nozzle boom 12 from the horizontal position downward by a predetermined angle α or more. Stopper 4 for restricting rotation of
6. When the link member 40 comes into contact with the stopper 46, the nozzle boom 12 is prevented from swinging downward from the lying position by the predetermined angle α or more. Thereby, for example, the interval holding means 22
When a certain distance from the ground is not maintained, such as when falling into a groove in the ground, the nozzle boom 12 does not swing beyond the predetermined angle α, so that the tip of the nozzle boom 12 hits the ground or the like. Damage can be prevented.

[0007]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a plan view schematically showing a boom sprayer. As shown in FIG. 1, the boom sprayer 2 includes a work body 6 that can be driven and driven in a driver's seat 4 and a tank 8 that stores the liquid to be sprayed, which is loaded on the work body 6. At the rear of the work body 6, a hose support base 10 for mounting a hose (not shown) wound on a reel used when the worker sprays liquid or the like with a hand-held nozzle is provided. Have been. A frame 14 constituting a base for supporting the nozzle boom 12 is attached to a further rear portion of the hose support base 10. FIG. 2 is a rear view of the boom sprayer 2. Referring to FIG. 2, the frame 14 for supporting the nozzle boom 12 has a horizontal member 16 extending in a horizontal direction. The nozzle booms 12 are provided at left and right ends of the horizontal member 16 symmetrically, respectively. The nozzle boom 12 is connected to the horizontal member 1.
6 is pivotally mounted on a horizontal axis 18 along the front-rear direction of the work body 6 so as to be vertically swingable, and the nozzle boom 12 extends vertically (in FIG.
The nozzle boom 12 swings between a lying position (shown on the right side of the work body 6 in FIG. 2) in which the nozzle boom 12 extends in the lateral direction. The nozzle boom 12 is provided with a plurality of nozzles 20 provided along a longitudinal direction thereof for spraying a liquid agent or the like toward the ground at predetermined intervals, and sprays the liquid agent or the like from each nozzle 20. When the spraying operation is not performed, the nozzle boom 12 is moved to the lying position.
The nozzle boom 12 is moved to the upright position so as not to be in the way. The unfolding operation and the storing operation can be performed by a worker operating the work vehicle body 6 by remote control from the driver's seat 4. The mechanism for moving the nozzle boom 12 will be described later in detail.

Although not shown, the horizontal member 1
In No. 6, nozzles are arranged at predetermined intervals as a central nozzle boom. Below the nozzle boom 12, the nozzle boom 12 is held at a certain distance from the ground.
Are provided as spacing means. The wheel 22 is always grounded by the weight of the nozzle boom 12 on the ground. Therefore, when the ground is inclined, the nozzle boom 12 rotates along the inclination of the ground, and the distance between the nozzle boom 12 and the ground is always kept constant. The working traveling speed of the boom sprayer 2 is normally about 3 km / h.
Is relatively slow, the wheel 22 does not spring up due to the unevenness of the ground, and the wheel 22 is always kept in contact with the ground by the weight of the nozzle boom 12.
It is more preferable to use a caster wheel type wheel 22. 3 to 5 are detailed views of the moving mechanism of the nozzle boom 12 shown on the right side of FIG. 3 shows the nozzle boom 12 in the lying down position in which the nozzle boom 12 is deployed in the horizontal direction, and FIG.
FIG. 5 shows a state in which the nozzle boom 12 is pivoted further downward than the horizontal position of the falling position.

Referring to FIG. 3, an electric power cylinder 24 is provided above the horizontal member 16 and extends at an acute angle to the horizontal direction. At the end closer to the boom 12, there is provided a telescopic rod 26 which reciprocates straight between a retracted position and an extended position. A connecting member 28 is connected to an end of the horizontal member 16 at a first connection point 30 so as to be rotatable about the horizontal shaft 18. A base end of the nozzle boom 12 is connected to an outer end of the connection member 28 on the opposite side to the first connection point 30 via a U-shaped connection portion 32. As shown in FIG. 3, the connecting member 28 is integrally provided with an L-shaped arm 34 projecting vertically upward from the longitudinal axis of the nozzle boom 12, and the nozzle boom of the L-shaped arm 34 is provided. The distal end of the telescopic rod 26 of the power cylinder 24 is rotatably connected to a distal end portion of the power cylinder 24 at a second connection point 36. The second connection point 36
As shown in FIG. 3, is vertically displaced by a distance L ₁ upward from a horizontal axis passing through the first connection point 30 and by a distance L _{2 in the} horizontal direction from the first connection point 30. ing.

The base end of the power cylinder 24 has a third end.
It is pivotally connected to the upper end of a link member 40 at a connection point 38.
The lower end of the link member 40 is pivotally connected at a fourth connection point 44 to a stopper mounting member 42 fixed above the horizontal member 16 and extending vertically upward. A stopper 46 is attached to a side surface of the stopper attachment member 42 facing the nozzle boom 12. As will be described later, the stopper 46 is attached to the nozzle boom 12.
Is a predetermined angle α below the horizontal direction, for example, 20 °
The link member 40 is prevented from rotating downward so as not to rotate. Nozzle boom 1 configured as described above
The second moving mechanism operates as follows. When the telescopic rod 26 of the power cylinder 24 is in the projecting position (FIG. 3)
When the power cylinder 24 is retracted from the power cylinder 24 toward the retracted position (see FIG. 4), the force of the power cylinder 24 to be pulled in the lateral direction is:
The L-shaped arm 34 is applied to the nozzle boom 12 via the second connection point 36 (point of application of force). While the telescopic rod 26 moves between the extended position (see FIG. 3) and the retracted position (see FIG. 4), the second connecting point 36 at the distal end of the telescopic rod 26 is connected to the first connecting point. 3
0, the first connection point 30 and the second connection point 3
The distance L ₃ between the 6 moves from the position A while drawing an arc whose radius is to position A '(see FIG. 4). A moment about the first connection point 30 is generated by a component force in the tangential direction of the arc of the force pulled in the lateral direction of the power cylinder 24, and the nozzle boom 12 is rotated. The nozzle boom 12 is gripped in an upright state by the appropriate nozzle boom holding means 48 including a bracket and an insertion pin at the upright position. Here, the telescopic rod 2
The longitudinal axis of the power cylinder 24 at the retracted position and the extended position of No. 6 is disposed substantially on the extension of a line XX connecting the position A and the position A ′ shown in FIG. That is, the longitudinal axis of the power cylinder 24 is disposed substantially parallel to a tangent line at an intermediate point between the position A and the position A ′ on the arc.

As shown in FIG. 5, when the ground is not horizontal, for example, when it is inclined below the horizontal, the nozzle boom 12 and the wheels 22 move downward along the inclination of the ground, At this time, with the movement of the nozzle boom 12, the power cylinder 24 also moves as the link member 40 rotates. The wheel 22
When the nozzle boom 12 is inclined downward by 20 ° or more with respect to the horizontal direction, for example, when the nozzle falls into a groove on the ground, the link member 40 comes into contact with the stopper 46 so that the link member 40 Of the nozzle boom 12 is prevented.
Is also prevented. According to the present embodiment, since the power cylinder 24 is disposed in the horizontal direction at an acute angle with respect to the horizontal axis, a larger horizontal direction is provided by the power cylinder 24 at the upright position of the nozzle boom 12. With this force, the nozzle boom 12 can be reliably held at the upright position. Further, according to the present embodiment, the nozzle boom 12 is prevented from pivoting downward by more than 20 ° with respect to the horizontal direction by the contact of the link member 40 with the stopper 46. Therefore, in a range where the inclination of the ground is within an angle of 20 ° with respect to the horizontal direction, the nozzle boom 12 can rotate around the first connection point 30, and the distance between the nozzle boom 12 and the ground can be increased. Is kept constant, and the liquid agent or the like can be evenly sprayed. On the other hand, when the wheel 22 falls into a groove on the ground, the nozzle boom 1
2 does not rotate beyond an angle of 20 °, it is possible to prevent the swinging tip of the nozzle boom 12 from hitting the ground and being damaged.

The present invention is not limited to the embodiments described above, and various modifications can be made within the scope of the invention described in the claims, which are also included in the scope of the present invention. It goes without saying that they are things. In the present embodiment, the link member 40 is connected to the stopper mounting member 42, but the link member 40 may be directly connected to the horizontal member 16. Also,
In the present embodiment, the nozzle arm 12 is gripped by the nozzle arm holding means 48 in the upright position, however, when the telescopic rod 26 of the power cylinder 24 moves to the retracted position, Since the nozzle arm 12 is held in the upright position by force, it is not essential to provide the nozzle arm holding means 48.

[0013]

According to the present invention, it is possible to provide a boom sprayer capable of smoothly performing the operation of expanding and storing the nozzle boom and achieving the operation with a simple structure.

[Brief description of the drawings]

FIG. 1 is a plan view schematically showing a boom sprayer.

FIG. 2 is a rear view of a boom sprayer.

FIG. 3 is a diagram illustrating a lying position in which a nozzle boom is deployed in a horizontal direction.

FIG. 4 is a view showing an upright position where a nozzle boom is housed in a vertical direction.

FIG. 5 is a diagram illustrating a state in which the nozzle boom is rotated further downward than a horizontal direction.

[Explanation of symbols]

 2 Boom sprayer 12 Nozzle boom 14 Base 18 Horizontal axis 22 Spacing means 24 Power cylinder 26 Telescopic rod 34 Arm 36 Connection point 40 Link member 46 Stopper

Claims (3)

[Claims] A nozzle boom (1) having a proximal end rotatably connected to a base (14) via a horizontal shaft (18).
2) and a power cylinder (24) connected to the nozzle boom (12) and swinging the nozzle boom (12) between a laterally extending lying position and a vertically extending standing position; The distal end of the telescopic rod (26) of the power cylinder (24) is connected to an arm (34) provided at the base end of the nozzle boom (12) at a connection point (36). The arm (34) has a shape protruding upward when the nozzle boom (12) is in the lying position, the power cylinder (24) extends in the lateral direction, and has an axis thereof. A straight line (XX) connecting the connection point (36) when the nozzle boom (12) is in the upright position and the connection point (36) when the nozzle boom (12) is in the lying position is approximately one Are arranged to also base end portion of said power cylinder (24) said base (14)
A boom sprayer, which is mounted to be swingable with respect to the boom sprayer. 2. The power cylinder (24) is attached to the base (14) via a swingable link member (40), and the nozzle boom (12) maintains a distance from the ground. 2. A boom sprayer according to claim 1, further comprising a spacing means (22). 3. The link member (40) is moved so as to limit the movement of the power cylinder (24) accompanying the swing of the nozzle boom (12) from a horizontal position downward by a predetermined angle (α) or more. Stopper (46) for restricting rotation
The boom sprayer according to claim 2, comprising: