JPH0441963Y2 - - Google Patents

Description

[Detailed explanation of the invention] [Industrial application field] The front loader of an agricultural riding tractor is widely used as a multi-purpose tractor for purposes such as leveling the land and transporting compost. The bucket can be removed and the boom of the boom sprayer can be attached, making it easy to adjust the boom up and down.

[Conventional technology]

Most boom sprayers have a frame with a chemical tank attached to the three-point linkage of a tractor, and a boom attached to the rear of the frame. The height of the boom was adjusted manually or hydraulically.

In other words, in the case of a manual type, in which a chemical tank c is mounted on a frame b having a stand a as shown in Figs. 2 and 3, a guide frame d is provided at the rear of the frame b, and upper and lower A large number of boom mounting holes e are drilled in the direction, and the center boom f is fixed to these holes with bolts g at an appropriate height.
As shown in the figures to FIG. 6, the center boom f is guided by guide rollers h and slid up and down with respect to the guide frame d by a hydraulic cylinder j installed on a stay i.

[The problem that the idea attempts to solve]

In the conventional case, it is necessary to provide a guide frame at the rear of the frame in any case.Especially in the manual type, the bolt g is removed, the center boom f is lifted, and the bolt is fixed again at a predetermined height, so this work is possible. It is difficult to do so. In addition, the hydraulic type requires a hydraulic cylinder, stay, guide device, etc., and since it is attached to the rear of the frame, the frame needs to have the strength to support the boom. The balance was poor and it was not possible to mount a large-capacity chemical tank. In order to maintain balance, a balance weight was attached to the front of the tractor, which increased the overall weight, which caused problems such as the tractor being pressed against the field. Also, during spraying, it was not possible to adjust the boom height according to the height of the spraying target. The nozzle nozzle is fixed to the boom and faces downwards, so the spray speed and wind can affect the spray speed and the mist discharged from the nozzle may be washed away before it can reach the spray target. It was a lot.

[Means to solve the problem]

Here, this invention includes a tractor 1, a chemical tank 5 mounted on a frame 6 via a three-point link 4 at the rear of the tractor 1, and a driver's seat 14.
an operating rod 7 which extends forward and whose base end is pivoted to the side edge of the tractor 1 and is swingable up and down by a first hydraulic cylinder 12; A link 15 that is swingable via a cylinder 13, a bracket 8 that is attached to the operating rod 7 and the front end of the link 15, and a leg 11 that can be attached to and detached from the bracket 8 and that can be moved laterally. A chemical liquid spraying device consisting of an expandable spray rod 9 is proposed.

[Effect]

Next, an embodiment of this invention shown in the drawings will be described.

In FIG. 1, reference numeral 1 denotes a tractor having front wheels 2 and rear wheels 3, and a frame 6 on which a chemical tank 5 is mounted is connected to the rear of the rear wheels 3 via a three-point link 4. On the other hand, remove the bucket from the bracket 8 of the bucket attachment part at the tip of the pair of operating rods (front loader lift arms) 7 that protrude forward of the tractor 1, and attach the spray rod (boom) 9 using the pin 10. The spray rod 9 is removably pivoted, and a leg portion (boom stand) 11 is detachably and foldably formed at the end of the spray rod 9 so that it can stand on its own when the spray rod 9 is removed. More specifically, the spray rod 9 consists of a center boom and side booms pivotally supported at both ends of the center boom so as to be openable and closable, and boom stands 11 are attached near both ends of the center boom, and a bracket 8 is attached to the center boom. A center boom bracket is fixedly attached, which is removable by means of a pin 10.

The operating rod 7 extends in front of the driver's seat 14 of the tractor 1, and its base end is pivotally supported on the side edge of the tractor 1. A second hydraulic cylinder, ie, a tilting hydraulic cylinder 13, which is capable of swinging at one end, and whose one end is supported by the operating rod 7 and a link 15 is connected to the other end, and the first hydraulic cylinder 12 cooperate with each other. The front end of the operating rod 7 and the link 15 are pivotally connected to a bracket 8 which is connected to the spray rod 9 with a pin 10. This is achieved by

When spraying a chemical solution, the spray rod 9 is in an expanded state, and its driving means is a conventional method of opening and closing the spray rod, either manually, or hydraulically using a hydraulic power source from a tractor, or mounted on a frame. A hydraulic type using a hydraulic power source is possible.

The above configuration can be easily achieved in an agricultural tractor by simply removing the bucket attached to the tip of the front loader lift arm and pivoting the spray rod, depending on the necessity of agricultural work.

[Effect of idea]

The mechanism of this invention having the above structure has the following effects. That is, a. The hydraulic system for driving the front loader lift arm can be used as is, and a boom sprayer in which the nozzle height of the spray rod can be adjusted by hydraulic pressure can be obtained at low cost.

b. Since the spray rod is not attached to the frame of the sprayer, there is no need for a frame to support the spray rod, which increases safety in terms of strength.

c) The weight balance of the tractor is improved because a spray rod is attached to the front, and a large capacity tank for chemical solutions is attached, improving work efficiency.

d Since the spray rod is located in the front, visibility is improved and the risk of the spray rod hitting obstacles is reduced.

e By using the front loader lift arm as the operating rod, the spray rod can be raised higher than before, allowing the boom sprayer to spray chemicals even on tall crops.

f The operating rod extends forward for good visibility, and during spraying, it is easy to change the spray rod to an appropriate height depending on the growth level and height of the sprayed target.

g Since the operating rod is equipped with a tilting hydraulic cylinder, the direction of the nozzle of the downwardly facing spray rod can be adjusted depending on the speed of the tractor and the direction of the wind.

h The legs are provided at the bottom of the spray rod, so
Since it can be stored upright, it does not have to be carried by multiple people or placed close to the ground when stored, which reduces the risk of the nozzle being soiled or damaged by being hit. .

i The spray rod is pin connected to the bracket,
Since it is easy to attach and detach, you can quickly switch to other tasks.

[Brief explanation of drawings]

Figure 1 is a side view showing the mechanism of this invention, Figure 2 is a side view of a conventional manual boom height adjustment device, Figure 3 is a rear view of the device shown in Figure 2, and Figure 4 is a side view of the mechanism of this invention. A side view of a conventional device for adjusting boom height using hydraulic pressure.
It is an enlarged view of arrow A in the figure. In the figure, 1...Tractor, 7...Operation stick (front loader lift arm), 9...Spray rod (boom), 11...Legs (boom stand),
12...First hydraulic cylinder (vertical hydraulic cylinder), 13... Second hydraulic cylinder (tilt hydraulic cylinder).

Claims (1)

[Scope of utility model registration request] A tractor 1, a chemical solution tank 5 mounted on a frame 6 at the rear of the tractor 1 via a three-point link 4, and a first tank extending in front of the driver's seat 14 and having its base end pivoted on the side edge of the tractor 1. Hydraulic cylinder 1
2, the operation stick 7 that can be swung up and down, and this operation stick 7.
a link 15 whose base end is pivotally connected to the link 15 and is swingable via a second hydraulic cylinder 13; a bracket 8 attached to the operating rod 7 and the front end of the link 15; A chemical liquid dispersion device consisting of a spray rod 9 which has legs 11 at the bottom and can be expanded laterally.