JPH0440965B2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field The present invention provides an agricultural spreader connected to a tractor with a cabin, in which the opening/closing and opening degree of the shutter along the bottom of the hopper can be remotely controlled from inside the cabin. Regarding the constructed switchgear.

(b) Prior Art and its Problems A conventional agricultural sprayer connected to a tractor and used to spray fertilizers and agricultural chemicals is known, for example, as disclosed in Japanese Utility Model Application Publication No. 56-52926.

However, with this technology, the opening of the shutter is automatically adjusted according to the traveling speed of the tractor, and the operator cannot adjust the opening of the shutter according to field conditions or fertilizer conditions. be. Furthermore, when the tractor body is stopped, it is not possible to open the shutter and take out the remaining amount of fertilizer.

Furthermore, in an agricultural spreader, a technology is known in which a switch for adjusting the amount of fertilizer dispensed is provided near the seat, as disclosed in Japanese Utility Model Publication No. 75829/1983.

As another prior art, Utility Model Application Publication No. 59-122024 extends the shutter opening/closing lever along the bottom of the hopper forward and upward, and the operator operates this lever while facing backwards while sitting in the driver's seat. are doing.

However, as modern tractors have come to have a cabin in the driver's seat, it is no longer possible for the worker to open and close the shutter while sitting in the driver's seat, and the worker must get off the tractor and operate the shutter each time. This is an inconvenience.

An object of the present invention is to provide an opening/closing device for an agricultural sprayer that solves these problems.

(c) Means for solving the problems The problems to be solved by the present invention are as described above.
The means for solving this problem is as follows.

In an agricultural spreader that is connected to a tractor with a cabin and sprays fertilizers and agricultural chemicals, an opening/closing lever 24 is connected to a shutter 22 along the bottom surface of the hopper 10 via an intermediary member, and the opening/closing lever 24 is driven by a motor M. transmission member or hydraulic cylinder C
An operating switch for connecting the piston rod of and operating the motor M or hydraulic cylinder C is provided in the driver's seat in the cabin, and at both ends of the rotation width of the opening/closing lever 24,
An opening-side limit switch and a closing-side limit switch are provided to set the opening degree of the shutter 22, and the opening-side limit switch can be moved and adjusted in the vicinity of the opening/closing lever 24.

(D) Embodiment In Figures 1, 2, and 5, 1 is a tractor body, and a cabin 3 that covers the driver's seat 2 is attached to the rear upper part, and two lower links 4 and 1 are attached to the back. It has a three-point link consisting of the top link 5 of the book. 6 is a battery provided in the engine section of the aircraft. Reference numeral 7 denotes an arm pivotally attached to the back of the fuselage 1, which is connected to the center of the lower link 4 by a rod 8. When the operating lever (not shown) is pushed forward, the arm 7 rotates counterclockwise to close the lower link. Raise 4.

Reference numeral 10 denotes a hopper with a considerable width, the upper surface of which is covered with a cover plate 11, which is connected with a hinge so that it can be opened and closed freely, and the front and rear sides of the hopper have an arcuate bottom surface 1 that slopes downward.
Consecutive with 2. Reference numeral 13 denotes a rectangular underframe on which the hopper 10 is placed. Four groove-shaped beams are assembled into a rectangular frame to have a width approximately 1/3 of the hopper 10, and two beams are installed on the rear crosspiece of this underframe. Attach the leg piece 14 of the hopper 10 to the center of the rear slope of the hopper 10, bend the two supports 15 established on the front crosspiece of the underframe 13 a little, align it with the center of the front slope of the hopper 10, and attach it to the top of the slope. Support 15 is attached to the angle beam 16 attached to the edge.
Join the apical ends of. Hopper 10 has two pillars 1
The two lower links 4 are connected to the base plate 17 protruding from the bent portion of the beam 16, and the top link 5 is connected to the protruding piece 18 provided at the center of the beam 16.
The hopper 10 is connected to the tractor body 1 through the three-point links 4 and 5 by the arm 7 and the protruding piece 18, and the three-point links 4 and 5 are connected to the hopper 10 by the rotation of the arm 7.
Raise the hopper and support it in a horizontal position.
When the hopper is removed from the three-point link, the underframe 13 is placed on the ground to support the hopper.

20 is a gear box provided at the center of the bottom of the hopper 10, which houses a worm and a worm gear (both not shown).
A built-in worm is attached to the drive shaft 19 that enters from the front, and a driven shaft that exits from both sides (not shown)
A worm gear is attached to the drive shaft 19, and the drive shaft 19 is connected to a power take-off shaft (not shown) of the tractor, and the driven shaft is rotated at a reduced speed. 21 is a stirring impeller provided at the bottom of the hopper 10. A large number of blades arranged at a certain pitch are attached to a core shaft, the inner end of the core shaft is connected to the driven shaft coming out of the gear box 20, and the outer end is connected to the driven shaft of the hopper. It is supported by a bearing (not shown) at the side end, and an impeller 21 is rotated at the bottom of the hopper 10 to stir and feed out the fertilizer.

This hopper 10 has a large number of oblong outlets at a constant pitch over the entire length of the bottom surface 12, and a long shutter 22 along the bottom surface is fitted into a guide (not shown) attached to the bottom surface of the hopper. Hold it freely and slide in the direction.

The shutter 22 is also provided with a large number of outlets 23, as shown in FIGS. 2 and 5, and the size, total number, and pitch of the outlets 23 are made equal to the outlet of the hopper 10. 24 is a short opening/closing lever that is slightly bent, and is placed in the center of the hopper 10 and parallel to the front slope.
The metal 25 of the elbow part is planted on the substrate 17, loosely fitted onto the pin, and supported so as to be freely slidable.

26 is a relay rod made of a round bar, whose front end is bent sideways and fitted into the round hole at the lower end of the opening/closing lever 24, extended horizontally to the rear, bent its rear end downward, and this rear end is connected continuously. Fit into the round hole at the front end of piece 27. The continuous joint piece 27 is L-shaped when viewed from above, and the metal 28 at the elbow
is loosely fitted onto a pin set on the front crosspiece of the underframe 15, and the rear end is connected to the shutter 22 via a pin 29.

When the opening/closing lever 24 is moved to the front side A as shown in FIGS. 2 and 5, the relay rod 26 moves rearward as shown by arrow A1, and the connecting piece 27 rotates clockwise as shown by arrow A2. , the shutter 22 moves to the right as shown by the arrow A3, the outlet 23 of the shutter aligns with the outlet of the hopper 10, opens this outlet, and moves the opening/closing lever 24 to the opposite rear side B, the relay rod 26
moves forward as shown by arrow B1, and the connecting piece 27 rotates counterclockwise as shown by arrow B2, so the shutter 22 moves to the left as shown by arrow B3, and the exit 23 of the shutter is aligned with the exit of the hopper 10. Close this exit by deviating from it.

The opening/closing mechanism described above is a prior art developed in 1983.
This is almost the same as Publication No. 122024, and in the prior art, the opening/closing lever was made longer and operated manually by the operator.

In this embodiment, the opening/closing lever 24 is shortened and linked to a motor or hydraulic cylinder, so that the hopper can be opened and closed by remote control.

The first embodiment is a hopper 1 shown in FIGS. 1 and 2.
An angle bracket 30 is welded at right angles to the center of the beam 16 attached to the front slope of the beam 16 so as to protrude forward and downward.
1 is planted and covered with collars 32, 32, and a band-shaped guide piece 33 is attached to the pins 31, 31 to form an elongated guide groove 34 between it and the bracket 30, and the opening/closing lever 24 is inserted into this guide groove. Insert the upper end and hold it freely moving forward and backward. Reference numeral 35 denotes a scale attached to the top surface of the bracket 30, and limit switches La and Lb are attached to both ends of this scale, so that the mounting position of the limit switch La on the opening side can be changed through the elongated hole 36 of the bracket, and the limit switch Lb on the closing side can be changed. Fix it.

M is a motor that moves the opening/closing lever 24, and is attached to a key-shaped seat plate 37 fixed to the center of the guide piece 33, and connected to a chain ring 38 on the motor shaft and chain rings 39, 39 loosely fitted to the pins 31, 31. A chain 40 is hung, a part of the chain is tied to a pin 41 protruding from the opening/closing lever 24, and the opening/closing lever 24 is moved forward or backward through the chain 40 by forward and reverse rotation of the motor M. Reference numeral 42 denotes a switch box provided in the driver's seat 2 of the tractor, which is equipped with an operation switch S1 and an indicator light P1, and is connected to the middle of the electric path from the battery 6 of the tractor to the motor M and limit switches La and Lb. Here, the operation switch S1 uses a 3-contact, 2-set changeover switch, and the limit switch La,
Lb is a normally closed contact type, and these switches, battery 6, indicator light P1 and motor M are connected to the third
Connect according to the wiring diagram shown in Figure 4.

In this first embodiment, when the lever 43 of the operating switch S1 is pushed forward, its contact piece comes into contact as shown in FIG. Rotate D2 counterclockwise. This rotation of motor M causes the second
In the figure, the chain 40 moves counterclockwise;
Since the opening/closing lever 24 connected to the chain moves forward as shown by the arrow A, the shutter 22 moves in the direction of the arrow A3 via the relay rod 26 and the connecting piece 27,
The outlet 23 of the shutter coincides with the outlet of the hopper 10 and opens this outlet. When the shutter 22 fully opens the hopper outlet, the opening/closing lever 24 pushes the lever of the limit switch La on the opening side and turns off this switch, so the indicator light P1 goes out and the motor M
The opening/closing lever 24 and the shutter 22 also stop. In addition, if you change the mounting position of the limit switch La on the opening side using the elongated hole 36,
Since the amount of movement of the shutter 22 is different, the hopper 1
The opening degree of the 0 outlet can be adjusted. Next, when the switch lever 43 of the operation switch S1 is tilted backward, its contact pieces come into contact as shown in FIG. Rotate in the direction.

This rotation of the motor M causes the chain 40 to move clockwise in FIG. 22 moves in the direction of arrow B3, and the outlet 23 of the shutter deviates from the outlet of the hopper 10 and closes this outlet 23.

When the shutter 22 closes the hopper outlet, the opening/closing lever 24 pushes the lever of the limit switch Lb on the closing side and turns off this switch, so the indicator light P1 goes out and the motor M also stops, and accordingly, the opening/closing lever 24 and the limit switch Lb turn off. The shutter 22 stops. Since the stop position of the shutter 22 is constant when closing the outlet of the hopper 10, the limit switch Lb on the closing side is fixed to the bracket 30. In addition, the limit switches La and Lb close their internal contacts immediately when the opening/closing lever 24 is released.

In the second embodiment, as shown in FIG. 5, an angle bracket 44 is welded at right angles to the center of the beam 16 attached to the front slope of the hopper 10 so as to protrude forward and downward. The cylinder C is installed and the piston rod 45 is connected to the upper end of the opening/closing lever 24. 46 is a scale attached to the top surface of the bracket 44, and limit switches are installed at both ends of this scale.
Install Wa and Wb and switch the limit switch on the opening side.
The mounting position of Wa can be changed using the elongated hole 47 of the bracket, and the limit switch on the closing side can be changed.
Fix Wb. V is a solenoid valve attached to the bracket 44, which is connected to the hydraulic unit U of the tractor shown in FIGS.
advance and retreat. 48 is a switch box installed in the driver's seat of the tractor, and is equipped with an operation switch S2 and two indicator lights P2 and P3.
Connect in the middle of the electrical circuit from the solenoid valve V to the limit switches Wa and Wb. Operation switch S2 is 3
Use the contact changeover switch to set the limit switch.
Use normally closed contacts for Wa and Wb. Connect these switches to the battery 6, indicator lights P2 and P3, and solenoid valve V as shown in the wiring diagrams shown in Figures 6 and 7. Flow control valve R and hydraulic unit U
Connect the pipes according to the same piping diagrams in Figures 6 and 7.

In this second embodiment, when the lever 49 of the operating switch S2 is pushed forward, its contacts come into contact as shown in FIG. 6, current flows in the direction of the arrow F1, the indicator light P2 lights up, and the The solenoid on the left side is energized and the spool is sucked to the left, the pressure oil sent from the hydraulic unit U flows in the direction of arrow F2 and enters the front part of the hydraulic cylinder C, and the pressure oil in the rear part flows in the direction of arrow F3. direction and returns to the hydraulic unit U. As a result, the piston rod 45 is drawn into the hydraulic cylinder C as shown by arrow F4, and the opening/closing lever 24 connected thereto moves forward as shown by arrow A in FIG. The shutter 22 is moved in the direction of arrow A3 through the shutter 22, so that the outlet 23 of the shutter coincides with the outlet of the hopper 10 and opens this outlet. When the shutter 22 fully opens the hopper outlet, the opening/closing lever 24 pushes the lever of the limit switch Wa to turn off the switch, turning off the indicator light P2 and deenergizing the solenoid of the solenoid valve V. 45, the opening/closing lever 24, and the shutter 22 stop. Note that if the mounting position of the limit switch Wa is changed using the elongated hole 47, the amount of movement of the shutter 22 will be different.
The opening degree of the outlet of the hopper 10 can be adjusted.

Next, when the switch lever 49 of the operating switch S2 is tilted to the rear, its contacts come into contact as shown in FIG. 7, current flows in the direction of arrow G1, indicator light P3 lights up, and the right The solenoid is energized and the spool is sucked to the right, the pressure oil sent from the hydraulic unit U flows in the direction of arrow G2 and enters the rear of the hydraulic cylinder C, and the pressure oil in the front part flows in the direction of arrow G3. It flows back to the hydraulic unit U. As a result, the piston rod 45 is pulled into the hydraulic cylinder C, and the opening/closing lever 24 connected to the piston rod 45 is moved into the fifth position.
Since the shutter 22 moves in the direction of the arrow B3 via the relay rod 26 and the connecting piece 27, the outlet 23 of the shutter moves toward the rear as shown by the arrow B in the figure.
0 exit and close this exit.

When the shutter 22 closes the outlet of the hopper, the opening/closing lever 24 pushes the lever of the limit switch Wb and turns off this switch, so the indicator light P3 goes out and the solenoid of the solenoid valve V is also deenergized, and accordingly, the piston rod 45 Then, the opening/closing lever 24 and shutter 22 stop. Note that when the exit of the hopper 10 is closed, the stop position of the shutter 22 is constant, so the limit switch Wb is fixed to the bracket 30. Further, the limit switches Wa and Wb close their internal contacts immediately when the opening/closing lever 24 is released.

The above describes two embodiments of the present invention, and the present invention is not limited to these embodiments, and the settings can be changed within the scope of the invention. For example, the chain 40 may be replaced with a timing belt or other transmission member. May be used.

(E) Effects of the Invention Since the present invention is configured as described above, it has the following effects.

First, in an agricultural spreader connected to a tractor with a cabin, a transmission member driven by a motor or a piston rod of a hydraulic cylinder is connected to the shutter opening/closing lever along the bottom of the hopper, and the motor or hydraulic cylinder is operated. Since the switch is installed in the driver's seat inside the cabin, the shutter can be opened and closed extremely easily using this operating switch. Moreover, the trouble of having the operator get off the tractor one by one to open and close the shutter is eliminated, and there is an effect that the working efficiency of the agricultural spreader installed in the tractor with a cabin can be greatly improved.

Second, by making the limit switch on the opening side movable and adjustable, the opening degree of the shutter can be adjusted and the amount of fertilizer applied can be adjusted, so the position of the limit switch can be adjusted depending on the difference in the field or the type of fertilizer. By doing so, the amount of spraying can be easily adjusted.

[Brief explanation of drawings]

The drawings show two embodiments of the present invention; FIG. 1 is a side view of the first embodiment and a tractor with a cabin provided therewith; FIG. 2 is an enlarged perspective view of the main parts of the first embodiment; Figures 3 and 4 are wiring diagrams of the first embodiment, Figure 5 is an enlarged perspective view of the main parts of the second embodiment, and Figures 6 and 7 are wiring and piping diagrams of the second embodiment. It is. 1...Tractor body, 10...Hopper, 22...
Shutter, 24...Opening/closing lever, 26, 27...Intermediary member, M...Motor, 40...Chain, C...Hydraulic cylinder, 45...Piston rod thereof, S1, S2...Operation switch.

Claims (1)

[Claims] 1. Hopper 10 is an agricultural sprayer that is connected to a tractor with a cabin and sprays fertilizers and pesticides.
An opening/closing lever 24 is connected to the shutter 22 along the bottom surface of the shutter 22 via an intermediary member, and a transmission member driven by a motor M or a piston rod of a hydraulic cylinder C is connected to this opening/closing lever 24. An operating switch for operating the shutter C is provided in the driver's seat in the cabin, and an opening-side limit switch and a closing-side limit switch for setting the opening degree of the shutter 22 are provided at both ends of the rotation range of the opening/closing lever 24, and An opening/closing device for an agricultural spreader, characterized in that a limit switch can be moved and adjusted in the vicinity of an opening/closing lever 24.