JPH0645476U - Boom sprayer nozzle boom folding device - Google Patents

Abstract

(57) [Abstract] [Purpose] The nozzle boom moves up and down along the unevenness of the ground to keep the distance between the nozzle and the ground constant, and it is possible to spray evenly and without damaging the grass etc. Furthermore, it is necessary to prevent the nozzle boom from rising during spraying work, and to tilt the nozzle boom with a small, lightweight and inexpensive power cylinder. [Structure] An extension portion 4a inside a mounting fulcrum 6 of a nozzle boom 4 having a support wheel 5 provided on a frame 17,
A tip end of a telescopic rod 7a of the power cylinder 7 is pivotally supported 8, and an outer tip end of a bracket 9 extending outward from a base end portion 7b of the power cylinder 7 is axially fixed to the frame 17 side. And a spring 11 for pulling the base end portion 7b of the power cylinder 7 upward.
Further, between the frame 17 and the nozzle boom 4, a boom for pulling the nozzle boom 4 in the upright state in the folding direction.
A tension spring 12 is provided.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a boom boom sprayer nose boom folding device used in golf courses, farms, orchards and the like.

[0002]

[Prior art]

 The boom sprayer is configured, for example, by providing a nozzle boom for spraying a liquid on a frame arranged at a rear portion of a working vehicle body in which a liquid tank containing a chemical liquid, fertilizer, etc. is mounted. The nozzle boom has a long length in order to widen the spread width, and is used by being provided so as to extend horizontally horizontally on both left and right sides of the work vehicle body.

However, the long nozzle boom takes a space during storage and traveling on a road, and its handling is troublesome and time-consuming, so that it is foldable. That is, a fixed nozzle is provided on a frame arranged in the center of the rear part of the work vehicle body, and tiltable nozzle booms are provided on both left and right ends of the frame. In addition, it was configured so that it would fold upward while standing on the road.

[0004]

[Problems to be solved by the device]

 To extend the nozzle boom to the left and right and to fold it upright, a power cylinder such as a large hydraulic cylinder is used in the case of a relatively large boom sprayer, and a manual cylinder is used in the case of a small boom sprayer. Was done by. However, in either case, since the nozzle boom is fixed horizontally on the left and right of the work vehicle during the spraying work, the distance between the nozzle boom and the nozzles attached to it and the ground is constant. However, the amount of spray varied due to the unevenness of the ground, making uniform spraying difficult.

Further, in the case of controlling the nozzle boom only by the power cylinder, a large cylinder is required, which is expensive, and in the case of manual operation, the driver must drop down when moving and working, and the nozzle boom must be removed. It had to be raised and lowered, which was troublesome.

The present invention has been made in view of the above circumstances, and the nozzle boom moves up and down in conformity with the unevenness of the ground to keep the distance between the nozzle and the ground constant, so that uniform spraying is possible. In addition, the nozzle boom is tilted smoothly to prevent damage to the grass and the like due to the impact when the supporting wheels touch the ground, and to prevent the nozzle boom from floating during spraying. -The tilting mechanism can be tilted with a small, lightweight, and inexpensive power cylinder.

[0007]

[Means for Solving the Problems]

 That is, according to the present invention, a telescopic rod end of a power cylinder is axially fixed to an extension portion inside a mounting fulcrum of a nozzle boom having a support ring provided on a frame, and the base end of the power cylinder is fixed. And a spring for pulling the base end of the power cylinder upward is provided while the outer tip of the bracket extending outward from the section is axially fixed to the frame side. Further, a boom tension spring for pulling the nozzle boom in the upright folding direction is provided between the frame and the nozzle boom.

[0008]

[Action]

 In the present invention, the base end portion 7b of the power cylinder 7 is not completely fixed but is axially fixed and movable via the projecting bracket 9. Therefore, even after the nozzle boom 4 is inclined and overhanging, 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. When retracting and traveling on the road, the telescopic rod 7a of the power cylinder 7 is extended so that the nozzle boom 4 is attached to the frame 17 with the mounting fulcrum 6 as an axis. And it is folded upright.

Next, when the operator arrives at the work site, the nozzle boom 4 is tilted and projected to both sides of the work vehicle body 1.

That is, the telescopic rod 7a of the power cylinder 7 is contracted, the nozzle boom 4 is tilted horizontally, and 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 constantly support the nozzle boom 4 in a suspended state by the power cylinder 7, so that the power cylinder 7 can be small, lightweight and inexpensive.

Further, in the traveling and spraying work after the support wheels 5 are in contact with the ground, the unevenness of the ground E is transmitted to the nozzle booms 4 via the support wheels 5. Here, in the present invention, a bracket 9 is extended outward from the base end portion 7b of the power cylinder 7, and the outer end of the bracket 9 is axially fixed to the frame 17 side by a pin 10. Therefore, the power cylinder 7 can swing around the pin 10, and the nozzle boom 4 moves up and down along the unevenness of the ground E, so that the distance between the nozzle 3a and the ground E is kept constant. Sagging and uniform spraying.

Further, during the spraying operation, the reaction force of the spray of the chemical liquid or the like acts in the direction of lifting the nozzle boom 4, but in the present invention, the power cylinder 7 is mounted above the base end portion 7b of the power cylinder 7. Since the spring 11 for pulling the nozzle boom is provided, the inward extension 4a of the nozzle boom 4 is pulled upward by the spring 11 via the power cylinder 7, and conversely the tip direction of the nozzle boom 4 is directed toward the ground side. Since it is pushed, it is possible to prevent the nozzle boom 4 from being lifted up unexpectedly during the spraying work.

Further, due to the positional relationship between the attachment fulcrum 6 of the nozzle boom 4 and the connecting portion of the tip end of the telescopic rod 7a of the power cylinder 7 with respect to the nozzle boom 4, the support wheel is supported on the ground E when the nozzle boom 4 is extended. The overhanging speed becomes slower as 5 approaches, and the impact does not damage the lawn or the like when the supporting wheel 5 touches the ground.

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

[0016]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings.

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

The folding of the nozzle boom 4 means folding from the overhanging state at the horizontal position to the upright state.

In the figure, 5 is a caster wheel type support wheel provided at an appropriate position of the tilting nozzle boom 4, and is adjusted in advance to a height for supporting the nozzle boom 4 in parallel with 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 pin 8 at the extension 4a. The axis is stopped. Next, the bracket 9 is extended outward from the base end portion 7b of the power cylinder 7, and the outer tip end thereof is locked by the pin 10 to the frame 17 side.

Further, a spring 11 for pulling the power cylinder 7 upward (counterclockwise as viewed in the figure) is provided at the base end portion 7b of the power cylinder 7. That is, one end of the spring 11 is connected inward from the axial 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 should be noted that it is desirable that the power cylinder 7 be of an electric type in order to simplify the apparatus. More preferably, the nozzle boom 4 is erected between the bracket 17a projecting on the inner upper surface of the frame 17 and the bracket 4b projecting on the upper surface outside the fulcrum 6 of the nozzle boom 4 in the upright folding direction. A tension spring 12 for pulling is provided.

In the figure, 13 is a hose for supplying a chemical solution or the like to the nozzles 3 and 3a, and 14 is a force in the front-rear direction to the nozzle boom 4, for example, the nozzle boom 4 that is bulged during movement. In case of hitting an obstacle, the joint part for swinging the nozzle boom 4 forward or backward to escape is provided, 15 is a hand correction spray nozzle, and 16 is a hose reel for the hand correction spray nozzle. Is.

In the present invention having the above-mentioned structure, the base end portion 7b of the power cylinder 7 used for overhanging and folding the nozzle boom 4 is not completely fixed but swings. 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 vehicle body 1 (frame 17), and the unevenness of the ground E is caused by the grounding of the support wheels 5. Since it moves up and down along the ground and keeps parallel to the ground E, uniform spraying is performed.

Further, during the spraying work, the nozzle boom 4 does not unexpectedly lift up due to the reaction force of the spray of the chemical liquid and the overhang of the nozzle boom 4 is smooth, and the power cylinder 7 is provided. Can be small, lightweight, and inexpensive.

[0026]

According to the present invention, unlike the prior art, since the nozzle boom moves up and down along the unevenness of the ground to keep the distance between the nozzle and the ground constant, uniform spraying is possible, and the nozzle Since the tilting of the boom is performed smoothly, the turf is not damaged by the impact when the support wheels touch the ground, and the lift of the nozzle boom is prevented during spraying work. It is possible to obtain the effect that the tilting of the frame can be performed by a small, lightweight and inexpensive power cylinder.

[Brief description of drawings]

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

FIG. 2 is a rear view of the boom sprayer according to the present invention with a part thereof omitted.

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

[Explanation of symbols]

 1 Working Carriage 3 Fixed Nozzle 4 Nozzle Bum 4a Extension 5 Support Wheel 6 Mounting Support 7 Power Cylinder 7a Telescopic Rod 7b Base End 9 Bracket 11 Spring 12 Boom Tension Spring 17 Frame

Claims (2)

[Scope of utility model registration request] 1. An extension 4a inside a mounting fulcrum 6 of a nozzle boom 4 having a support wheel 5 provided on a frame 17.
In addition, the tip of the telescopic rod 7a of the power cylinder 7 has a shaft stopper 8
The outer tip of the bracket 9 extending outward from the base end portion 7b of the power cylinder 7 is attached to the frame 17
A nozzle boom folding device for a boom sprayer, characterized in that a shaft 11 is provided on the side and a spring 11 for pulling the base end portion 7b of the power cylinder 7 upward is provided. 2. The nozzle boom folding of a boom sprayer according to claim 1, further comprising a boom tension spring 12 provided between the frame 17 and the nozzle boom 4 for pulling the nozzle boom 4 in the upright folding direction. apparatus.