JP2589518Y2 - Boom sprayer nozzle boom folding device - Google Patents

Description

[Detailed description of the invention]

[0001]

The present invention relates to golf courses, farms,
The present invention relates to a nozzle boom folding device for a boom sprayer used in an orchard or the like.

[0002]

2. Description of the Related Art A boom sprayer has a structure in which, for example, a nozzle boom for spraying a liquid is provided on a frame disposed at a rear portion of a working body equipped with a liquid tank containing a chemical solution, fertilizer, and the like. Have been. And the nozzle boom is
It is configured to be long in order to widen the spray width, and is provided so as to protrude horizontally horizontally on both the left and right sides of the work vehicle.

[0003] However, the long nozzle boom takes up space during storage and running on a road, etc., and is cumbersome and cumbersome to handle, so that it is freely foldable. That is, a fixed nozzle is provided on a frame disposed in the center of the rear part of the work vehicle, and nozzle booms are provided on both sides of the frame so that the nozzle boom can be tilted. When running, it is configured to be folded upright.

[0004]

In the case of a relatively large boom sprayer, a power cylinder such as a large hydraulic cylinder or the like is used for extending the nozzle boom to the left and right and standing up and down. In the case of a boom sprayer, it has been performed manually. However, in any case, since the nozzle boom is fixed horizontally on the left and right sides of the work vehicle during the spraying operation, the distance between the nozzle boom and the nozzle attached thereto and the ground is not constant. In addition, the amount of application varied due to the unevenness of the ground, and it was difficult to perform uniform application.

Further, when the nozzle boom is controlled only by the power cylinder, a large cylinder is required and it becomes expensive, and in the case of manual operation, the driver goes down one by one when moving and working, and the nozzle boom is raised and lowered. Had to be done.

The present invention has been made in view of the above circumstances, and the nozzle boom moves up and down in accordance with the unevenness of the ground to maintain a constant distance between the nozzle and the ground, thereby enabling uniform spraying. The nozzle boom is tilted smoothly to prevent damage to turf and the like due to impact when the support wheel comes into contact with the ground, and furthermore, when spraying the nozzle boom.
In this configuration, the lifting of the nozzle is effectively prevented, and the tilting of the nozzle boom can be performed with a small, lightweight, and inexpensive power cylinder.

[0007]

That SUMMARY OF THE INVENTION The present invention is, in the extension of the mounting fulcrum inward of the nozzle boom having a support wheel provided in the frame, the tip of the telescopic rod is locked shaft pin to the power cylinder , abolish the shaft pin outward tip to the frame side of the bracket to extend toward the outside from the proximal end of the power cylinder Rutotomoni inner than Jikutome position by the pin of the proximal end of the power cylinder One end
Is connected is obtained by a structure in which a spring pulling the power cylinder upwards, further between the frame <br/> over arm before Symbol nozzle, a boom extension spring pulling direction folding upright the nozzle This is a configuration provided.

[0008]

According to the present invention, the base end 7b of the power cylinder 7 is not completely fixed but extends outward from the base end 7b .
The outer end of the bracket 9 is attached to the frame 17 by the pin 10.
And please caution is configured to moving locked axis. Therefore, even after the nozzle boom 4 is inclined and protruded, the nozzle boom 4 is not fixed in a horizontal state with respect to the frame 17 and moves up and down along the unevenness of the ground E.

First, the extension of the nozzle boom 4 will be described.
Is extended, and the nozzle boom 4 is folded upright about the fulcrum 6 attached to the frame 17.

Next, when arriving at the work site, the nozzle boom 4 is tilted and overhangs on both sides of the work body 1.

That is, the telescopic rod 7a of the power cylinder 7 is contracted, the nozzle boom 4 is tilted horizontally,
The support wheel 5 is grounded. As a result, the nozzle boom 4 is supported by the support wheel 5, and the load on the power cylinder 7 is reduced. Therefore, in the present invention, it is not necessary to always support the nozzle boom 4 in a suspended state with the power cylinder 7, so that the power cylinder 7 can be small, light and inexpensive.

Further, in the traveling spraying operation after the support wheel 5 is touched, the unevenness of the ground E is caused by the nozzle block through the support wheel 5.
Is passed on to system 4. Here, the present invention has a configuration in which a bracket 9 extends outward from a base end portion 7b of the power cylinder 7 and the outer distal end of the bracket 9 is axially fixed to the frame 17 by a pin 10. Therefore, the power cylinder 7 is swingable about the pin 10, so that the nozzle boom 4 moves up and down along the unevenness of the ground E,
The distance between the nozzle 3a and the ground E is kept constant, and uniform spraying is performed.

Further, during the spraying operation, the reaction force of the spray of the chemical solution or the like acts in a direction to lift the nozzle boom. In the present invention, the pin 10 of the base end portion 7b of the power cylinder 7 is used.
Because coupled at one end than the inward Jikutome position according to pulling the power cylinder 7 upward spring 11 is provided, the inner extension portion 4a of the nozzle boom 4 via a power cylinder 7 by the spring 11 Since the nozzle boom 4 is pulled upward and the tip end direction of the nozzle boom 4 is pressed to the ground side, it is possible to prevent the nozzle boom 4 from unexpectedly largely floating during the spraying operation.

Further, a fulcrum 6 for mounting the nozzle boom 4
And the position of the connecting portion of the distal end of the telescopic rod 7a of the power cylinder 7 with respect to the nozzle boom 4,
When the support wheel 5 approaches the ground E when the support wheel 5 is overhanging, the overhang speed becomes slower, and when the support wheel 5 touches the ground, the impact does not damage the turf or the like.

Further, if a boom extension spring 12 is provided between the frame 17 and the nozzle boom 4 to pull the nozzle boom 4 in the upright folding direction, the force required for the upright folding of the nozzle boom 4 can be reduced. Thus, the power cylinder 7 can be made smaller, lighter, and cheaper.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings.

As shown in FIGS. 1 and 2, in the illustrated example of a boom sprayer, a liquid tank 2 is mounted on a self-propelled work body 1 and a fixed nozzle 3 is provided on a frame 17 at a rear portion. During the spraying operation, the nozzle booms 4 are extended horizontally at the left and right ends of the frame 17, and the nozzle booms are configured to be foldable. The fixed nozzle 3 and the nozzle nozzle are pumped by a pump (not shown).
A chemical solution or the like is sprayed from a nozzle 3a provided in the system 4.

Note that the folding of the nozzle boom 4 means that the nozzle boom 4 is folded upward from a protruding state at a horizontal position.

In the drawing, reference numeral 5 denotes a caster wheel type support wheel provided at an appropriate position of the tilting nozzle boom 4, which is previously adjusted to a height which supports the nozzle boom 4 parallel to the ground E. is there.

In the present invention, an extension 4a is formed inside the mounting fulcrum 6 of the horizontal nozzle boom 4, and the tip of the telescopic rod 7a of the power cylinder 7 is pivotally connected to the extension 4a by a pin 8. Is stopped. Next, a bracket 9 extends outward from a base end portion 7b of the power cylinder 7 and its outer end is pinned to the frame 17 by a pin 10.

Further, a base end 7b of the power cylinder 7
The power cylinder 7 upward (counterclockwise as viewed in the figure)
Is provided. That is, one end of the spring 11 is connected inward from the shaft stop position of the base end portion 7b of the power cylinder 7, and the other end is locked to the frame 17 side.

It is desirable that the power cylinder 7 be electrically driven to simplify the apparatus. More preferably, the bracket 1 protruding from the inner upper surface of the frame 17
A tension spring 12 is provided between the bracket 7a and a bracket 4b protruding from the upper surface of the nozzle boom 4 at a position outside the fulcrum 6. The tension spring 12 pulls the nozzle boom 4 in the upright folding direction.

In the drawing, reference numeral 13 denotes a hose for supplying a chemical solution or the like to the nozzles 3 and 3a, and reference numeral 14 denotes a force in the front-rear direction on the nozzle boom 4, for example, the nozzle boom 4 which is extended during movement.
Is a joint for swinging the nozzle boom 4 forward or backward to release when hitting an obstacle, 15 is a hand-held correction spray nozzle, and 16 is a hose for the hand-corrected spray nozzle. is there.

In the present invention having the above structure, the base end 7b of the power cylinder 7 used for projecting and folding the nozzle boom 4 swings without being completely fixed. Therefore, even after the nozzle boom 4 is extended, the nozzle boom 4 is not fixed in a horizontal state with respect to the work body 1 (frame 17). Moving and keeping parallel with the ground E, uniform spraying is performed.

Further, during the spraying operation, the nozzle boom 4 is not unexpectedly largely lifted up due to the reaction force of the spray of the chemical solution or the like, and the overhang of the nozzle boom 4 is smooth. Lightweight and inexpensive.

[0026]

According to the present invention, unlike the related art, the nozzle boom moves up and down along the unevenness of the ground to maintain a constant distance between the nozzle and the ground, so that uniform spraying is possible. -Since the tilting of the boom is performed smoothly, the lawn and the like are not damaged by the impact when the support wheel touches the ground, the lifting of the nozzle boom during the spraying operation is prevented, and the tilting of the nozzle boom is further improved. Can be performed with a small, lightweight, and inexpensive power cylinder.

[Brief description of the drawings]

FIG. 1 is a perspective view of a boom sprayer according to an embodiment of the present invention as viewed from the rear.

FIG. 2 is a partially omitted rear front view of the boom sprayer according to the present invention.

FIG. 3 is an enlarged perspective view of a main part of FIGS. 1 and 2;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Work body 3 Fixed nozzle 4 Nozzle boom 4a Extension part 5 Support wheel 6 Mounting fulcrum 7 Power cylinder 7a Telescopic rod 7b Base end part 9 Bracket 11 Spring 12 Boom tension spring 17 Frame

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) A01M 7/00 B05B 17/00

Claims (2)

(57) [Scope of request for utility model registration] 1. A support wheel provided on a frame ( 17 ).
Attachment fulcrum for nozzle boom ( 4 ) having ( 5 )
(6) in the extension of the inner (4a), a power cylinder (7)
The tip of the telescopic rods (7a) is locked axial pin (8),
Wherein the outer tip of the bracket (9) that extends toward the outside from the proximal end of said power cylinder (7) (7b) Frame
(17) axis abolish a pin (10) on the side Rutotomoni, wherein the pin of the proximal end of the power cylinder (7) (7b) (1
0), one end is connected inward of the shaft stop position by
A spring ( 1 ) that pulls the work cylinder (7) upward
1 ) A nozzle boom folding device for a boom sprayer, characterized in that: To wherein said nozzle boom (4) and the frame (17) between, the boom sprayer of claim 1 having a boom extension spring (12) pulls in the direction folded upright the nozzle boom (4) Nozzle boom folding device.