JPH0143522B2 - - Google Patents

Description

[Detailed Description of the Invention] This invention aims to restore the aeration and drainage properties of the hardened plowing platform around the roots of crops such as fruit trees, by driving an air blower into the plowing platform from below. The present invention relates to a driving control device in a tiller expansion and softening device that blows out pressurized air to expand and soften the tiller.

In order to save labor, the equipment frame is suspended from a traction machine such as a tractor using a work equipment lifting mechanism, and the air tiller and its air blower can be raised and lowered by the lifting mechanism to the equipment equipment frame. It is mounted so that it can be easily moved to a desired position by a traction machine, and the air blowing body is driven to a predetermined depth by a driving mechanism to blow out and inflate pressurized air into the ground. When moving after finishing softening, the lifting mechanism pulls out the air blower to reduce the hanging length from the equipment frame, and then the work equipment lifting mechanism lifts the equipment frame by a small amount of lift. The applicant has developed a tiller expansion device configured to allow
It is proposed separately.

However, when the tiller is particularly hardened, it is difficult to pull out the driven air blower using the lifting mechanism.
The work equipment lifting mechanism lifts the air blower to more than its full depth and pulls it out, but this adds additional pull-out resistance to the inflation device, which is suspended overhanging the traction machine. , there is a risk that the front part of the towing machine will float up and cause it to fall over. In such a case, we thought that tapping the air blowing body a little would make it easier to pull it out, so we have devised the following technical means in this invention.

That is, the air blowing body 10 of the air cultivating section I is mounted on the machine frame 1 suspended from the traction machine 4 by the work machine lifting mechanism H, so that it can be raised and lowered by the lifting mechanism L.
is driven into the ground by a driving mechanism K, and the plowing platform expansion device is configured to blow out pressurized air from the air blowing body 10. When the equipment frame 1 is moved up by the working equipment lifting mechanism H, a detector S is provided to detect the above-mentioned upward movement of the equipment frame 1 to the air cultivating section I. This is a driving control device for a plowing platform expansion device which operates a driving mechanism K by using a driving mechanism K.

Since this invention is configured as described above, the following technical effects can be obtained.

That is, when the tiller is so hard that the lifting mechanism L can hardly pull out the air blowing body 10 and the working machine elevating mechanism H is trying to pull out the air blowing body 10, the air tilling section I is near the end position of the driving stroke, and at this time, the equipment frame 1 begins to move upward with respect to the air cultivating section I due to the operation of the work equipment lifting mechanism H, so the detector S is activated, and the detector S is activated. As a result of the operation, the driving mechanism K operates and the air blowing body 10 is driven dry, so that the air blowing body 10 can easily escape from the ground.
The accident in which the front part of the vehicle floated up has been resolved. The start of this dry striking operation is performed in conjunction with the lifting operation of the work equipment lifting mechanism H when the tiller is abnormally hard and the lifting mechanism L cannot function. Since the blank firing operation is automatically performed, there is also the advantage that there is no waste and no special attention is required from the operator.

An embodiment of the present invention will be explained based on the drawings. As shown in the left side view in Fig. 1 and the rear view in Fig. 2, an air reservoir 2 and a compressor 3 are fixedly installed on the equipment frame 1, and the pressurized air is supplied to the air cultivating section I, which will be described later. is supplied by, for example, a hose. The front lower part of the device frame 1 is pivotally connected to the rear of the left and right lower links 5, 5 which are pivotally connected to the rear lower part of the towing machine 4, and the top which is pivotally connected to the center of the upper part of the towing machine 4. Attach the rear of link 6 to device frame 1
It is pivotally connected to an upright mast 7 and formed into a parallel link with a top link 6 and lower links 5, 5 of equal length, and rotates up and down as the lift piston of the traction machine 4 moves up and down. When the left and right lift arms 8, 8 of the working machine elevating mechanism H move the lower links 5, 5 up and down via the lift rods 9, 9, the machine frame 1 is configured to always move up and down in the same posture. Then, an air tank 12 is installed on the driving mechanism K, which has an air blowing body 10 provided at the lower part, and rollers 13, 13 are pivotally supported on the left and right sides of the air tank 12 to form an air cultivation section I, which is stood on a receiving plate 14. Rollers 13 are loosely fitted into the provided vertical rails 15, 15 having a U-shaped cross section, so that the air cultivating part I can move up and down in a straight line along the vertical rails 15, 15.

A lifting cylinder 16 is attached to the vertical rails 15, 15, and a receiving plate 18 fixed to the top of the air tank 12 is supported on the top of the piston 17, and as the piston moves in and out, the air cultivation section I moves up and down the vertical rail. 15
It is configured as a lifting mechanism L that linearly moves up and down along... Then, a hollow cylindrical horizontal rod 19 is arranged and fixed in the left-right direction on the device frame 1, and a horizontal frame 20 that is fitted in the horizontal rod 19 and can be moved left and right has a U-shaped cross section. The rails 21, 21 are arranged and fixed in the front and back direction, and the mounting plates 22, 22 fixed to the vertical rails 15, 15 have rollers 23, 23, 23,
23 are disposed and pivoted in the front and rear, and the rollers 23... are loosely fitted to the front and rear rails 21, 21. Although not shown, the front and rear rails 21, 21 and the mounting plates 22, 2
Vertical rails 15, 15 by means of springs latched to 2.
lock in place.

As shown in FIG. 3, the driving mechanism K is a mechanism in which a striking piston 24 strikes the head of the air blower 10 using a known air hammer (not shown), for example.
As shown in FIG.
The main supply route for the pressurized air in the air reservoir 2 is through the supply valve A, the switching valve B, and the injection valve C, but the air is also supplied from the dry injection valve G. The air tank 12 is connected so as to be supplied to the impact piston 24, and the pressurized air in the air tank 12 is connected to the blow valve D.
Further, the pressurized air in the air reservoir 2 is supplied to the lower surface of the piston 17 of the lifting cylinder 16 via the lifting valve E. Connect each.

When the pressure in the air tank 12 reaches a predetermined pressure (for example, 10 kg/cm ² ), the supply valve A closes its normally open contact 28a by the actuator 28c as shown in FIG. When the electromagnetic solenoid _a1 is energized, the communication path _a2 from the air reservoir 2 to the switching valve B is opened as shown in the figure, and when the predetermined pressure is not reached, the actuator 28c is is in contact with the normally closed contact 28b, so the supply valve A is closed by _{the spring A3} .
The spool returns and the connection between the air reservoir 2 and the switching valve B is cut off. Switching valve B and lifting valve E
is designed to operate in conjunction with the grounding operation of the receiving plate 14, and a grounding detector 31 is connected to a bracket 29 fixed to the horizontal rod 19 by means of a pin 30.
When the receiving plate 14 is grounded, the grounding detector 31 is also grounded, and as shown in FIG. When separated from the respective spools b ₁ and e ₁ , the communication passage b ₂ of the switching valve B communicates the supply valve A with the driving valve C,
In addition, the exhaust passage _e2 of the lifting valve E releases the pressurized air in the lifting cylinder 16 to the atmosphere, and although not shown, when the receiving plate 14 is suspended above the ground surface. In this case, the spools b ₁ and e ₁ are pushed by the spring 32, and the switching valve B cuts off the passage to the driving valve C.
The lifting valves E are each configured to supply pressurized air from the air reservoir 2 to the lifting cylinder 16 via a communication passage _e3 .

The injection valve C is connected to the air blowing body 10 against the receiving plate 14.
The switching valve B and the striking piston 24 are controlled to communicate with each other until it reaches a downward movement position of a certain depth, that is, a predetermined driving depth.
For example, a long actuating piece 35 is attached to the air tank 12 of the air cultivation section I to the vertical rail 15 via the mounting plate 34, and is attached so as to be movable up and down with bolts 36, 36 as shown in FIG. As shown in FIG. 4, until the body 10 reaches a predetermined driving depth,
The main body 35a of the actuating piece 35 is the spool of the driving valve C.
Push in c ₁ (in the illustrated example, the roller of the driving valve C comes into contact with the main body part 35a and the spool c ₁ is pushed in)
Therefore, as shown in Fig. 4, switching valve B is switched by driving valve C.
A passage toward the striking piston 24 is opened, and a driving operation is performed. Although not shown, when the air blowing body 10 reaches a predetermined driving depth, the stop portion at the bottom of the actuating piece opens. 35b, the spool _c1 returns to the right in FIG. 4, the passage from the switching valve B to the striking piston 24 is closed, and the driving operation is completed. Then, the driving operation is interrupted in the middle of the predetermined driving depth, and
In order to blow pressurized air into the tiller, an interruption valve F is provided between the switching valve B and the driving valve C. Since the interruption switch 39 is normally placed on the input side, the interruption valve F is connected to the switching valve B. The driving operation is performed without interruption by communicating with the driving valve C, but the driving operation can be interrupted by switching the interruption switch 39 to the off position at a desired driving depth. ing.

The detector S that operates the dry firing valve G is attached to one of the vertical rails 15 as illustrated in FIG. Position it as you wish,
When the air blower 10 is driven to within a predetermined depth, the roller 13 is above the actuator Sc and the roller 13 is attached to the actuator Sc as shown in FIGS.
Since there is no contact, the normally open contact Sa remains open, and the dry firing valve G closes to the air reservoir 2 as shown in Figure 4.
Then, when the equipment frame 1 is lifted by the lifting operation of the work equipment lifting mechanism H while the air blower 10 is being driven, the air is removed directly from the blowing piston 24. Since the blower 10 and the air tiller I do not move and the detector S moves upward together with the vertical rail 15, the actuator Sc of the detector S hits the stationary roller 13 as shown in Figs. 6 and 8. The normally open contact Sa closes and the electromagnetic solenoid _g1 of the dry shot valve G is energized, so the communication passage _g2 of the dry shot valve G opens the supply path 40 and hits the pressurized air in the air reservoir 2. It is configured to be supplied to the piston 24.

In the illustrated example, the detector S is attached to the vertical rail 15 via a square-shaped stopper 41 fitted into a groove in the vertical rail 15, and the detector S is attached to the vertical rail 15 so that the roller is not in the normal contact position shown in FIGS. 6 and 8. When the detector S approaches the roller 13 further, the left and right convex portions of the stopper 41 collide with the roller 13, thereby preventing the detector S from being damaged. Note that the reference numeral 40 is an unload valve.

In the normal state, the blow valve D has a valve seat 36a that communicates the air tank 12 with the vertical hole 10a as shown in FIG.
_d1 is closed, but when the injection switch 38 is turned on, the electromagnetic solenoid 37 is energized and the valve portion _d1 moves downward from the position shown in FIG. 4, and the valve seat 36a is closed.
is opened, the pressurized air in the air tank 12 flows into the vertical hole 10a of the air blower 10, and blows into the ground from the blow-off holes 10b at the lower part of the vertical hole 10a.

Next, if the lift arms 8, 8 are raised until the grounding detector 31 is separated, the spring 32 causes the push plate 33 to push the spool e ₁ of the lift valve E, so that the air reservoir 2 , 2 is supplied to the lifting cylinder 16 via the lifting valve E and the piston 17
will protrude and sufficiently lift the pneumatic cultivation section I, and the air blowing body 10 will escape from the ground. Further, as the air cultivating section I moves upward, the spool _c1 of the driving valve C comes into contact with the main body part 35a of the actuating piece 35, and a passage from the switching valve B to the striking piston 24 is opened. However, on the other hand,
Since the spool _b1 of the switching valve B is pushed by the actuating plate 33, the pressure air in the air reservoirs 2, 2 closes the flow path to the injection valve C by the switching valve B.
The driving operation remains stopped. Therefore, the traction machine 4 is moved to position the air blower 10 above the desired tilling position, and the operating lever of the work equipment lifting mechanism H of the traction machine 4 is operated in the downward direction to lift the lift arm 8, 8 is rotated downward, the device frame 1 also moves downward, and first the grounding detector 31
is grounded, the spools e ₁ , b ₁ of the lifting valve E and switching valve B are released from the pushing force of the pushing plate 33 as shown in FIG. Since the piston 17 and the air cultivating section I are discharged into the atmosphere from the exhaust passage _e2 of the upper valve E, the lower end of the air blowing body 10 is in contact with the ground, and the switching valve B is not driven. Since the passage to valve C is opened, if the air tank 12 has a predetermined pressure, the pressurized air in the air reservoirs 2, 2 will pass through the supply valve A, the switching valve B, the interruption valve F, and the driving valve C to the driving mechanism K. striking piston 2
4, the air blower 10 is struck to start the driving process, and the tiller is gradually crushed and expanded. When the tilling mechanism I gradually moves down along the vertical rails 15, 15 and the air blowing body 10 penetrates to a predetermined depth, the spool c ₁ of the driving valve C is inserted into the stop portion 35b of the operating piece 35.
As a result, the driving valve C closes off the pressurized air from the switching valve B toward the striking piston 24, and the driving stroke ends. Therefore, if the operator operates the blowout switch 38, the valve part
d ₁ opens, the pressurized air in the air tank 10 flows into the vertical hole 10a of the air blower 10, and the lower blowout hole 1
From 0b..., air is ejected forcefully into the ground, allowing air to penetrate into the crushed plowing disks, causing them to swell and soften sufficiently.

After the fume is released, the equipment frame 1 is lifted by operating the lifting lever of the work equipment lifting mechanism H.
The device frame 1 first moves up a little and the grounding detector 31 separates, so the lifting valve E operates and the lifting cylinder 1
6 is supplied with pressurized air, the piston 17 comes into contact with the receiving plate 18, lifts the air cultivating section I, and pulls out the air blower 10. If the tiller is of normal hardness, the air blower 10 can move upward at this time, so the roller 13 will move away from the detector S, and the dry blowing valve G will not operate, but the hardness will increase. Since the air blowing body 10 cannot be pulled out by the lifting force of the piston 17 in the plowing platform, only the device frame 1 moves upward and the detector S is placed on the roller 13 as shown in FIGS. 6 and 8. The actuating body Sc comes into contact, the normally open contact Sa closes, the blank firing valve G operates, and a blank firing operation is performed. When the tiller becomes soft due to this dry striking operation, the air tiller I moves upward (relative to the machine frame 1) by the force of the piston 17.
The actuating body Sc separates from the roller 13, the blank driving operation ends, and the device frame 1 is lifted high.

Incidentally, the driving mechanism K is not limited to the air hammer type shown in the example, but may be driven by an eccentric crank driven by a compressor drive shaft, for example, to drive the striking piston 28.
The air blowing body 10 may be driven by hitting the air blower 10, and a structure in which the clutch portion of the eccentric crank is connected by the operation of the detector S is also included in the present invention.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, in which Fig. 1 is an overall side view, Fig. 2 is a rear view of the main part of Fig. 1, Fig. 3 is a partially cutaway front view of the driving mechanism, and Fig. 4 is a partially cutaway front view of the driving mechanism. The figure is a control circuit diagram, Figures 5 and 6 are views taken along arrow H in Figure 2, showing the respective states, and Figures 7 and 8 are main parts in Figures 5 and 6, respectively. FIG. Code explanation, 1...Equipment machine frame, 4...Traction machine, 1
0...Air blowing body, H...Work equipment lifting mechanism, I...
...Air tilling mechanism, K...Driving mechanism, L...Lifting mechanism, S...Detector.

Claims (1)

[Claims] 1. The air blower of the pneumatic tiller, which is mounted on the machine frame suspended by the work equipment lifting mechanism to the traction machine so that it can be raised and lowered by the lifting mechanism, is driven into the ground by the driving mechanism. In a plowing platform expansion device configured to blow out pressurized air from the air blowing body, when the pneumatic tilling section is near the end position of the driving stroke, the device frame is moved up by the working machine lifting mechanism. Driving control in a tiller expansion device in which a detector is provided to detect the above-mentioned upward movement of the air tiller portion of the device frame, and a driving mechanism is operated by the operation of the detector. Device.