JPH048727Y2 - - Google Patents

Description

[Detailed explanation of the invention] This invention aims to restore the air permeability and drainage of the hardened tillage around the roots of fruit trees, etc. by inserting an air blower into the tiller and applying pressure from below. This invention relates to a soil conditioner supplying device for a tiller expansion and softening device which blows out air to expand and soften the tiller, and also blows soil improvers such as fertilizer and lime into the tiller.

As such a device, the applicant has proposed, for example, Japanese Patent Application No. 1983-
No. 173478, the main part of which is shown in Figure 1, is the guide tube 2 of the driving mechanism 1.
The upper part of the air blowing body 4 is tightly fitted into the guide cylinder 2, and the head 4a of the air blowing body 4 is struck by the striking piston 3 of the striking mechanism installed in the guide tube 2 to drive the air blowing body 4 into the ground. When a predetermined depth is reached, the air blowing valve 5 is opened to blow the pressurized air from the air tank 6 into the ground from the blowing hole at the bottom of the air blowing body 4 through the blowing hole 4b. The switching valve 7 provided in the upper part of the hopper is communicated with the hopper 8 to blow out the pressurized air in the air reservoir 9 to the lower part of the hopper 8, and the suction action at this time transfers the soil conditioner in the hopper 8 to the supply pipe 10. The structure is such that the air flows into the air and is ejected into the ground from the ejection hole 4b in the lower part of the air blower 4 via the switching valve 7 and the ejection hole 4b. However, nozzle 4
The soil conditioner adhering to b and the vicinity of the switching valve 7 is
It may also flow back and adhere to the fitting portions of the striking piston 3 and the head 4a of the air blowing body 4 and the guide tube 2, causing the striking piston 3 to become stiff and difficult to perform a striking action.

Therefore, in this invention, in a tiller expansion device configured such that the air blower perforates the soil using a striking mechanism, and the air blower is configured to introduce pressurized air and a soil conditioner into the air blower, The air blowing body 1
1 includes a flange portion 11 that is integral with the flange portion 11 and projects in the radial direction.
a is provided, and the flange 11a is connected to the cylinder 1.
5, and a donut-shaped impact piston 14 is placed on the inner bottom surface of the flange 1, and a donut-shaped impact piston 14 is placed concentrically with the air blowing body.
1a, so that the striking piston 14 can strike the flange 11a, and an air tank 21 is disposed above the cylinder 15 to supply the air. A tank 22 is formed in the center of the blowing body 11 so that the upper end of the blowhole 11b formed vertically is exposed and can be opened and closed with an air jet valve 23, and the upper part of the air tank 21 is filled with a soil conditioner 25. The air tank 21 and the tank 22 for the soil conditioner 25 are connected to each other so that the air tank 21 and the tank 22 for the soil conditioner 25 can be freely opened and closed by a valve 24, so that the operating space of the impact piston is isolated from the introduction path of the soil conditioner. It is designed to ensure smooth movement of the striking piston.

The specific structure will be explained based on an example shown in the drawings. As shown in FIG. 21 and the tank 22 for the soil conditioner 25, and the jet holes 11c, 11c are opened at the lower end.
Furthermore, a collar 11a is provided at the intermediate portion. On the other hand, the driving mechanism 12 includes a cylinder 15, a hollow cylindrical impact piston 14, and a ball valve 19. It is configured to occlude the One flow path m communicates with the upper surface of the striking piston 14 in the cylinder 15, and the other flow path n
communicates with the lower surface of the percussion piston 14 within the cylinder 15.

Furthermore, an exhaust hole 20 communicating with the outside is provided in the middle portion of the cylinder 15, and this exhaust hole 20 branches into two passages 20a and 20b. One passage 20a opens above the upper end surface 14a of the striking piston 14 when the striking piston 14 is located at the lower end in the cylinder 15, and the other passage 20b opens above the upper end surface 14a of the striking piston 14. When the striking piston 14 is located downward, it is closed by the side surface of the striking piston 14, and when the striking piston 14 is raised, the stepped portion 14b provided at a slightly lower part of the striking piston 14 is closed. It is formed to open at a lower position. Further, the air blowing body 11 is connected to the cylinder 15 of the driving mechanism 12.
It passes through the center of the striking piston 14 in a vertically slidable manner.

Next, the operation of the driving mechanism 12 will be explained. First, as shown in FIG. 4, when the striking piston 14 reaches the lowest position, the internal pressure causes the ball valve 19 to move in the direction of closing the passage m and opening the passage n. Therefore, the pressurized air supplied from the driving valve 17, which will be described later, is supplied to the lower side of the striking piston 14 through the flow path n.
will rise. At this time, the air above the striking piston 14 is discharged to the outside from the exhaust hole 20 via the passage 20a. After the upper end surface 14a of the striking piston 14 passes through the passage 20a, there is no escape route for the air in the upper part of the cylinder 15, so that the upward inertia of the striking piston 14 and the air supplied to the lower part of the striking piston 14 are reduced. Due to the synergistic effect with the compressed air, the air in the upper part of the cylinder 15 is compressed and rises to the position shown by the chain line in FIG. When the striking piston 14 reaches the position indicated by the chain line, the lower passage 20b is opened and the air in the lower part of the cylinder 15 is removed.
Further, as mentioned above, as the pressure at the upper part of the cylinder 15 increases, the ball valve 19 moves in the direction of closing the flow path n, and the pressurized air from the flow path l flows into the flow path m.
It is supplied to the upper part of the cylinder 15 through the upper part of the cylinder 15. For this reason, the striking piston 14 is configured to suddenly descend and strike the collar provided on the air blowing body 11, thereby driving the air blowing body 11 into the ground.

An air tank 2 is placed above the air blowing body 11.
1 and a tank 22, a blow hole 11b which is vertically bored in the center of the air blowing body 11 is formed to communicate with the air tank 21 and the tank 22, and when the air blow valve 23 is opened, the pressurized air in the air tank 21 is released. The valve 24 is configured so that the air is ejected into the ground from the blowhole 11c at the bottom of the air blowing body 11 through the blowhole 11b.
When the air blowout valve 23 is opened, the soil improver 25 filled in the tank 22 passes through the air tank 21 and the blowholes 11b and blows out into the ground from the blowholes 11c along with pressurized air. The air blowing body 11 is mounted on the device frame 26 so as to be vertically movable, and in the illustrated example, as shown in a side view in FIG. The roller 27... which is pivotally supported on the device frame 2
The receiving member 29, which is fixed to the air tank 21 by engaging with the vertical rails 28, 28 of 6, is connected to the vertical rails 28, 28.
8, and a closing plate 31 is fixed to the lower end of the vertical rails 28, 28, so that when the air blowing body 11 is in the downward movement position, the air blowing body 11 moves up from the closing plate 31. The vertical rails 28, 2 are attached to the front and rear rails 32, 32, which are provided so as to protrude downward from the holes 31a, and which are fixed to the device frame 26.
Roller 3 is pivotally supported on side plates 33, 33 integral with 8.
4, 34, 34, 34 are engaged so that the side plates 33, 33 (that is, the air blowing body 11) can move back and forth to some extent with respect to the device frame 26 against the spring. Then, the lower part of the equipment frame 26 is connected to the left and right lower links 36, 36 of a traction machine 35 such as a tractor, and the mast 38 of the equipment frame 26 of the top link 37 of the traction machine 35 is connected. The left and right lift arms 39, 39, which are rotated up and down by the rotation of the lift piston, are connected to the lift rod 40,
When the lower links 36, 36 are moved up and down via the lower links 40, the device frame 26 and the air blower 11 are configured to always move up and down in the same posture.

Then, during work, if the traction machine 35 is moved to position the air blower 11 above the desired plowing position and the lift arms 39 are lowered, the device frame 26 will be lowered, but inside the lifting cylinder 30. Since the pressure air has been removed, the piston 30a and the air blowing body 11 are in the downward movement position, and as the device frame 26 is lowered, the lower end of the air blowing body 11 first touches the ground, and the air blowing body 11 is vertically moved. When the closing plate 31 moves relative to the rails 28, 28 and comes into contact with the ground, the grounding detector 41 operates and the not-illustrated switching valve opens and is pushed open by the not-illustrated operating piece. The pressurized air in the air reservoir 9 flows into the cylinder chamber 18 from the driving valve 17, and the striking piston 14 starts the striking operation as described above, and the air blowing body 11 is gradually driven into the ground. When the air blowing body 11 reaches a desired depth, the spool of the driving valve 17 comes off from the operating piece (not shown), so the driving valve 17 becomes closed, and the driving operation of the air blowing body 11 stops. do. Therefore, by operating the operating levers 42 and 43, the air jet valves 23 and 24 are opened, and the pressurized air in the air tank 21 and the soil conditioner 25 in the tank 22 are released into the blowhole 11b of the air blower 11.
The air is vigorously ejected into the ground from the blow-off holes 11c at the lower end, further crushing the plowing platform, and dispersing air and the soil conditioner 25 into the ground. When the inflation and softening operation is completed, the lift arms 39, 39 are raised to move the device frame 26 upward, and the air blowing body 1
1 can be pulled out from underground. At this time, pressurized air is supplied to the lifting cylinder 30 to move the piston 30a upward, thereby helping the upward movement of the air blower 11 and lifting the lift arm 39, This compensates for the lack of lift due to 39.

Since the soil conditioner supply device in the tiller expansion and softening device according to this invention has the configuration as detailed in the above-mentioned embodiment, the operating space of the impact piston 14 is isolated from the introduction path of the soil conditioner 25. As a result, the fear that the soil conditioner 25 would enter the vicinity of the striking piston 14 and become stubborn has been completely eliminated, and therefore the striking operation can always be performed smoothly. It will be done.

[Brief explanation of drawings]

Fig. 1 is a partially cutaway front view showing the main parts of a conventional soil improvement device, and Fig. 2 and subsequent figures show an embodiment of this invention. Figure 3 is a rear view, Figure 4 is a partially cutaway front view showing the main parts of the soil conditioner supply device, and Figure 5 A and B are the main parts showing the respective operating states of the ball valve in Figure 4. It is an enlarged view. Explanation of symbols, 11... Air blowing body, 11a... Flange, 14... Impact piston, 15... Cylinder,
18... Cylinder chamber, 25... Soil conditioner.

Claims (1)

[Scope of utility model registration request] The air blower perforates the soil using a striking mechanism, and the air blower 11 is installed in a plowing platform expansion device configured to allow pressurized air and a soil conditioner to be introduced into the air blower. is provided with a radially projecting flange portion 11a integrally with the flange portion 11a, and the flange portion 11a is placed on the inner bottom surface of the cylinder 15, and further,
A donut-shaped impact piston 14 is installed concentrically with the air blowing body into the cylinder 1 above the flange 11a.
5 so that the striking piston 14 can strike the flange 11a, and
An air tank 21 is disposed in the upper part of the cylinder 15, and an air blowing valve 23 is arranged so that the upper end of the blowhole 11b formed vertically in the center of the air blowing body 11 is exposed.
The air tank 21 is formed to be openable and closable.
A tiller swell characterized in that a tank 22 filled with a soil conditioner 25 is connected to the upper part of the plow board, and the air tank 21 and the tank 22 for the soil conditioner 25 are connected to each other so that they can be opened and closed with a valve 24. Soil conditioner supply device for soft equipment.