JPH0453229Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field This invention is a technology for opening and closing the shutter in response to the raising and lowering of the agricultural spreader in an agricultural spreader that is attached to the rear of an agricultural tractor via a work equipment attachment device. Regarding.

(b) Prior Art The technology of opening and closing the shutter of an agricultural sprayer by remote control from the cockpit has been well known. For example, Japanese Patent Application Laid-Open No. 61-289809.

(c) Problems that the invention aims to solve In these conventional technologies, the shutter was opened and closed by operating a motor, hydraulic cylinder, etc. by operating a shutter opening/closing operation switch installed near the tractor seat. and
It is necessary to operate the shutter open/close switch each time the agricultural spreader is raised or lowered, and if the shutter is not opened or closed at the same time as the raising/lowering operation at the end of the rotation, the chemicals may solidify at the end of the rotation. They even spread it to unrelated locations. Also,
If you forget to press the switch to start the work equipment after a rotation, or if the start of spraying is delayed, you will have to start over.

Therefore, the present invention attempts to open and close the shutter in accordance with the raising and lowering of the agricultural spreader.

(d) Means for solving the problem In view of the above points, the present invention is constructed as follows.

In the shutter opening/closing device of an agricultural spreader, a rotation detection sensor is provided at the rotation base of the work equipment mounting device A of the tractor or the rotation base of the lifting lever 5,
The shutter 22 is opened and closed by operating an actuator in response to a signal from the rotation detection sensor.

(e) Embodiment The purpose of the present invention is as described above, and the structure of the present invention will be explained based on the structure of the embodiment shown in the attached drawings.

FIG. 1 is an overall side view of an agricultural tractor equipped with an agricultural spreader having a shutter opening/closing device of the present invention. FIG. 2 is a perspective view of a shutter opening/closing device using a motor. Figures 3 and 4 are electrical circuit diagrams of the shutter opening/closing device. FIG. 5 is a perspective view of a shutter opening/closing device using a hydraulic cylinder. Figure 6 is also an electric circuit diagram and a hydraulic circuit diagram. FIG. 7 is a side view showing the positional relationship between the lower link and the sensor during work. FIG. 8 is a side view of the agricultural spreader when it is raised. 9th
The figure is also a side view of the agricultural spreader when it is lowered and the work is stopped.

In FIG. 1, an engine and a battery 2 are housed in a bonnet 1 of a tractor T with a cabin, and a lift lever 5 and an operation box 6 of a work equipment mounting device are arranged near a seat 3 in a cabin 4. A main switch 40, an open lamp 41, and a close lamp 42 are provided on the operation box 6.
A relay R is installed inside the operation box.
A lift arm 7 and a lower link 9 protrude rearward from the rear of the body of the tractor T, and a lift link 1 is provided between the tip of the lift arm 7 and the middle part of the lower link 9.
1 is interposed, and a top link 10 is pivotally supported by a hitch 8 fixed to the rear of the machine body, forming a three-point link type work equipment mounting device A, and an agricultural spreader is attached to the rear end of the lower link 9 and top link 10. B is installed.

Agricultural spreader B has a rectangular underframe 12.
A hopper 13 is placed on top of the hopper 13, and an agitator shaft 15 is installed horizontally at the bottom of the hopper 13. Blades 15a, 15a, . This stirs the spraying agent. Note that a configuration for driving the agitator shaft 15 is not shown. Drop holes for discharging the spraying agent are opened at regular intervals on the lower surface of the hopper 13, and a shutter 22, which also has an opening 22a, is fitted into the drop holes so as to be slidable from below to the left and right. , the drop hole can be opened and closed.

A mounting frame 14 is erected at the front of the underframe 12, the shutter opening/closing device of the present invention is attached to the upper part of the mounting frame 14, and the lower link 9 is pivotally connected to a mounting plate 17 protruding from the lower part of the mounting frame 14. It is equipped with a rotation detection sensor.

That is, in the shutter opening/closing device, as shown in FIG. The other end of the arm 27 pivotally supports one end of a connecting rod 26 , the other end of the connecting rod 26 is pivotally supported by one end of an opening/closing lever 24 , and the central portion of the opening/closing lever 24 is lateral to the mounting plate 17 . It is pivoted on a protruding pin. Then,
By rotating the opening/closing lever 24, the shutter 22 can be rotated left and right to open and close the drop hole at the bottom of the hopper 13.

Further, a beam 16 is installed horizontally on the mounting frame 14, and a bracket 30 is installed in front of the beam 16.
is provided protrudingly, a scale is engraved on the bracket 30, limit switches La and Lb are provided on both the front and rear sides of the bracket 30, and the limit switch La is bolted to a long hole opened in the bracket 30. It is fixed so that its position can be adjusted back and forth on the elongated hole, and the opening degree of the shutter 22 can be adjusted.

Then, the collars 32, 3 are attached to the side of the bracket 30.
A plate 33 is fixedly mounted through the bracket 30 and the plate 33, and the other end of the opening/closing lever 24 is inserted between the bracket 30 and the plate 33 and between the limit switches La and Lb. On the other hand, a motor mounting plate 23 is fixedly attached to the central side surface of the plate 33, and a motor M, which is an actuator such as a DC motor capable of forward and reverse rotation, is mounted.

A sprocket 19 is fixed to the drive shaft of the motor M, and sprockets 20 and 21 are rotatably supported at both ends of the plate 33. A pin 24a protruding from the opening/closing lever 24 is connected to a predetermined position of the chain 25.

When a hydraulic cylinder is used as another embodiment of the actuator, a solenoid valve 34 is disposed on the bracket 30 as shown in FIG.
is attached, and the tip of the piston rod 35a of the hydraulic cylinder 35 and the tip of the opening/closing lever 24 are pivotally connected, so that the shutter 22 can be opened and closed by expanding and contracting the hydraulic cylinder 35.

Further, the mounting plate 17 includes a lower link 9.
is pivotally supported, and a rotation detection sensor for detecting the position of the agricultural spreader B is provided. As shown in FIG.
Limit switches Lc and Ld are fixedly protruding from the mounting stays 7 and facing the tips of the mounting stays 36 and 37, respectively. Therefore, when the rear link 9 rotates upward as shown in Fig. 8, the limit switch Lc
is turned ON and the lower link 9 is rotated downward as shown in FIG. 9, the limit switch Ld is arranged to turn ON.

However, the mounting position of the rotation detection sensor is as shown in Fig. 1. Even if the limit switches Lc1 and Ld1 are installed at the rotation base of the lower link 9 on the machine side, the limit switch Lc2 is installed at the rotation base of the lift arm 7. ，
Ld2 may be provided, or limit switches Lc3 and Ld3 may be provided at the rotating base of the lifting lever 5.
Further, instead of the limit switch, a rotation angle sensor may be provided on the rotation shaft to detect rotation and control the actuator based on the detected rotation.

(f) Effect of the invention In such a configuration, when the shutter 22 is opened and closed by the motor M, the lower link 9 is in parallel when it is in the working state as shown in FIG. As shown in Figure 3, when the main switch 40 is turned on, the limit switch
Since Lc and Ld are not turned on, relay R does not operate, and its contacts r1 and r2 remain as they are, and motor M operates and rotates in the X direction, opening/closing lever 24, connecting rod 26, and L. shape arm 27
The shutter 22 can also be opened by moving in the direction of the arrow X.

Then, when the opening/closing lever 24 rotates further and the end contacts the limit switch La and turns on, one contact La1 of the limit switch La opens and the rotation of the motor M stops, and the other contact La2 closes and the open lamp 41 lights up to clearly indicate that the shutter 22 is open. However, open lamp 4
1. As shown in FIG. 6, the close lamp 42 is connected in series with the contacts r1 and r2, respectively, and the shutter 22
It is also possible to keep the light on all the time when the door is opened or closed.

Also, when the work is stopped and the agricultural spreader B is lowered and the limit switch Lc is turned on as shown in Figure 8, or when the agricultural spreader B is rotated as shown in Figure 9, etc.
When the limit switch Ld is turned on by raising the limit switch Ld, as shown in Fig. 4, the relay R is activated and its contacts r1 and r2 rotate to the other side, and the motor M rotates in the Y direction opposite to the above. be. Contact at this time
Since La2 is opened, the open lamp 41 is turned off.

Then, as shown in FIG. 2, the opening/closing lever 24,
The connecting rod 26 and the L-shaped arm 27 move in the direction of arrow Y, the shutter 22 is closed, and the end of the opening/closing lever 24 comes into contact with the limit switch Lb, turning it ON.
Then, one contact Lb1 of limit switch Lb
opens, motor M stops rotating, and the other contact
When Lb2 is closed, the close lamp 42 lights up, clearly indicating that the shutter 22 is closed.

At this time, if the main switch 40 is turned OFF, the relay R is also turned OFF, and its contacts r1,
r2 returns to its original state as shown in FIG. 3, but since no current flows through the motor M, the shutter 22 remains closed. Even if the main switch 40 is turned on again in this state, the limit switch Lc or Ld is closed, so the relay R is turned on at the same time as the limit switch Lc or Ld is closed.
is activated, and the shutter 22 does not open.

Also, instead of motor M, hydraulic cylinder 3
5, as shown in Figs. 5 and 6, the limit switch is not activated during the work shown in Fig. 7.
Since Lc and Ld are open, relay R is not activated and its contact r1 remains as is, the open lamp 41 lights up and the solenoid 43 is turned on.
Then, the electromagnetic valve 34 is switched, the hydraulic cylinder 35 is contracted, and the shutter 22 is opened in the same manner as described above. When the end of the opening/closing lever 24 comes into contact with the limit switch La and turns on, the circuit opens, the solenoid 43 turns off, and the operation of the hydraulic cylinder 35 also stops.

Then, when the work is stopped or the agricultural spreader B is raised as shown in Figure 8 or 9, the limit switch Lc or Ld closes, so the relay R is activated and the contact r1 moves. The open lamp 41 goes out and the close lamp 42 turns on, and at the same time, the solenoid 44 is turned on and the solenoid valve 34 is turned on.
The hydraulic cylinder 35 is extended and the shutter 22 is closed. Then, the end of the opening/closing lever 24 comes into contact with the limit switch Lb.
When turned ON, the circuit opens and solenoid 44 turns OFF.
Therefore, the operation of the hydraulic cylinder 35 also stops. 45 is a variable throttle for adjusting the operating speed of the hydraulic cylinder 35; 46 is a relief valve;
47 is a hydraulic pump.

(g) Effects of the invention With the above configuration, the invention provides the following effects.

In other words, when working, the shutter opens and closes automatically just by operating the lift lever of the work equipment, making operation easier, and there is no need to forget to open or close the shutter or delay in opening or closing the shutter. This made it possible to improve work efficiency.

[Brief explanation of the drawing]

FIG. 1 is an overall side view of an agricultural tractor equipped with an agricultural spreader having a shutter opening/closing device of the present invention. FIG. 2 is a perspective view of a shutter opening/closing device using a motor. Figure 3 is an electrical circuit diagram of the shutter opening/closing device when the shutter is open. Figure 4 is an electrical circuit diagram of the shutter opening/closing device when the shutter is closed. FIG. 5 is a perspective view of a shutter opening/closing device using a hydraulic cylinder. 6th
The figure is also an electric circuit and hydraulic circuit diagram. FIG. 7 is a side view showing the positional relationship between the lower link and the sensor during work. FIG. 8 is a side view of the agricultural spreader when it is raised. FIG. 9 is a side view of the agricultural spreader when it is lowered and the work is stopped. A...Work machine attachment device, B...Agricultural spreader,
Lc, Ld...Limit switch, M...Motor,
5... Lifting lever, 9... Lower link, 22...
Shutter, 35... Hydraulic cylinder.

Claims (1)

[Scope of utility model registration request] In the shutter opening/closing device of an agricultural spreader, a rotation detection sensor is provided at the rotation base of the work equipment mounting device A of the tractor or the rotation base of the lifting lever 5,
A shutter opening/closing device for an agricultural spreader, characterized in that a shutter 22 is opened and closed by operating an actuator in response to a signal from the rotation detection sensor.