JPH047163B2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field]

The present invention is a self-propelled type that easily performs deep plowing by towing a soil improvement work machine with a self-propelled vehicle and ejecting compressed air vigorously at predetermined intervals deep into the soil to create cracks in the soil. This relates to a pneumatic soil conditioner.

[Conventional technology]

As a soil improvement working machine of this type of self-propelled pneumatic soil improvement machine, for example, as disclosed in Japanese Patent Application Laid-Open No. 59-42801, a cylindrical structure is installed at the rear of a plate-like frame extending in the front and rear direction. A vertical blade body (fumarole strut) to which a conduit is fixed is integrally installed, and an auxiliary tank (sub tank) is fixed to the top of this conduit to temporarily store compressed air sent from a pressure accumulation tank (main tank). It is known that the vertical blade is equipped with a fumarole having a fumarole at the bottom, and the compressed air in the pressure storage tank is intermittently ejected from the fumarole into the soil via an auxiliary tank. . In addition, as disclosed in Japanese Patent Application Laid-open No. 56-163309, a vertical blade body with a digging body fixed to its lower end and a blowhole opened at the lower part of its leading edge is attached to a frame so that it can be swung up and down. Attached to the rear end of a swinging arm whose intermediate part is pivoted, the vertical blade swings up and down and back and forth (reciprocating motion) around the pivot point of the swinging arm.
There are also known ones that do this.

[Problems to be solved by the invention]

The device disclosed in Japanese Unexamined Patent Publication No. 59-42801 has a problem in that the traction resistance of the vertical blade body and the fume body is large. In addition, in the blade disclosed in JP-A-56-163309, although the traction resistance of the vertical blade body is reduced, the vertical blade body itself, which has a nozzle opening at the leading edge, swings with a back-and-forth motion component. Therefore, except when the vertical blade is at the front end of the swing, there is a space between the front edge of the vertical blade and the soil that leads to the ground surface, and when compressed air is blown from the nozzle at this time, the compressed air Either the vertical blade blows through to the ground surface through the gap, reducing the efficiency of the compressed air by halving the deep plowing area, or the vertical blade swings so that the compressed air blows out when the vertical blade is at the front end of the swing. In addition to requiring a mechanism to synchronize the compressed air jet and the compressed air jet, there were also problems such as the need for the supply pipe that supplies compressed air to the vertical blade body to have a structure that can withstand rocking.

[Means to solve the problem]

Therefore, in order to solve the above-mentioned conventional problems, the present invention equips a self-propelled vehicle with a soil improvement work machine that can be raised and lowered, and the soil improvement work machine includes a compressor and a compressor that is pressurized by the compressor. A tank that stores compressed air, a fumarole that intermittently blows the compressed air supplied from this tank into the soil, and a fumarole strut that is fixed to the fuselage so that it protrudes long downward from the fuselage with the fumarole at its lower end. and a cutting blade body that is provided on the front side along the fumarole strut and behind the fumarole of the fumarole and that moves reciprocally, and the cutting blade reciprocates when inserted into the soil together with the fumarole and the fumarole support. It is characterized by moving and cutting the soil in front of the fumarole column and behind the fumarole of the fumarole.

[Effect]

With such a configuration, the soil improvement work machine of the present invention moves forward while cutting the soil in front of the fumarole column, where the traction resistance is greatest, with the cutting blade, thereby reducing the traction resistance of the fume column. let me, and,
This prevents compressed air from blowing through.

【Example】

Hereinafter, one embodiment of the present invention will be described with reference to the drawings. In FIG. 1, reference numeral 1 designates a well-known riding tractor (self-propelled vehicle), and the rear of this tractor 1 includes a top link 2 and a pair of left and right lower links 3.
A three-point link hitch mechanism 4 consisting of
A soil improvement work machine 5 is mounted via this three-point link hitch mechanism 4 so as to be movable up and down. The soil improvement work machine 5 is provided with a top mast 7 connected to the top link 2 and a pair of left and right lower link connecting pins 3a connected to the lower link 3 at the front of a pair of left and right main frames 6. 6, the top mast 7 is connected to the connecting pin 3
It is pivoted about position a and is connected to the tractor 1 by a three-point linkage mechanism 4 so as to be movable up and down.
A compressor 8 is mounted between the main frames 6 and has an input shaft 8a projecting forward. At the rear end of the main frame 6 behind the compressor 8,
A main tank 9 is provided which is square in side view, extends long in the width direction of the fuselage, and is hollow and also serves as a horizontal frame. This main tank 9 communicates with the compressor 8 via a communication pipe (not shown). Furthermore, a fume strut 11 is attached to the main tank 9 via an attachment member 10 so as to protrude significantly downward. At the lower end of this fumarole column 11,
A fumarole 12 that protrudes forward is attached. Power is transmitted to the input shaft 8a from the PTO shaft 1a of the tractor 1 via an extendable propeller shaft 13. A sub-tank 14 is fixedly installed above the mounting member 10. The sub-tank 14 communicates with the main tank 9 via a switching valve (not shown), and also communicates with an air supply pipe 15 attached to the back of the blow-up strut 11 via the switching valve. Although not shown, a control mechanism is provided for switching both the switching valves at a predetermined timing. A thin portion 11a is formed at the front end edge of the jet strut 11. The fumarole 12 also includes a base 12a that is attached to the lower end of the fumarole strut 11 and protrudes forward, a tapered part 12b, a neck part 12c, and a sharpened part 12 that are sequentially formed on the distal end side of the base 12a.
d, and has a blowhole 16 opened in the neck portion 12c, and a vent hole (not shown) communicating with the air supply pipe 15 is provided in the base portion 12a and the tapered portion 12b to communicate with the blowhole 16. A cutting blade 17 is provided on the front side along the front edge of the jet strut 11 and behind the jet port 16 . This cutting blade 17 has a blade edge 17a formed on its front edge, has a bent portion from the upper end to the front side, and a swing arm 18 is integrally connected to this bent portion, and the connected portion also serves as a horizontal frame. The main tank 9 is pivotally supported via a shaft 20 between a pair of left and right brackets 19 projecting downward from the main tank 9 so as to be vertically movable.
The tip of the swing arm 18 is supported by a swing mechanism 21 shown in detail in FIGS. 2 and 3. The swinging mechanism 21 rotatably supports a spherical bearing 23 fixed to the tip of the swinging arm 18 at the lower part of the swinging plate 22, and also supports an eccentric shaft 24 at the upper part of the swinging plate 22. A cam 25 is fixed, a bearing 26 is provided on the outer periphery of the eccentric cam 25, and a spherical bearing 27 provided on the outer periphery of the bearing 26 is rotatably supported. The rotating shaft 24 is
Bearing member 2 supported by support frame 6a extending from a frame installed between main frames 6
8 and has a pulley 29, and this pulley 29 and a pulley 30 provided on the input shaft 8a.
A belt 31 is stretched between the two and receives rotational power. Then, the eccentric rotational motion of the eccentric cam 25 caused by the rotation of the rotating shaft 24 is transmitted to the swinging arm 18 via the swinging plate 22, and the cutting blade 17 moves back and forth around the shaft 20 as shown in FIG. It's starting to oscillate. Brackets 32 (one not shown) are suspended from the left and right ends of the main frame 6, and a shaft rod 33 is rotatably inserted between the brackets 32, 32. One end of the strut arm 34 is fixed, and a support ring 35 is pivotally supported at the other end of the strut arm 34. On the other hand, a support frame 36 is provided to protrude upward from the main frame 6 above the support wheel 35. A rotation piece 37 is attached to this support frame 36, and a rotation handle 38 is attached to the upper end of the rotation piece 37. A screw rod 39 attached to is rotatably supported. The lower end of the threaded cylinder 40, which is threadedly engaged with the threaded rod 39, is pivotally supported by the intermediate portion of the support arm 34. The left and right support wheels 35 are simultaneously reversibly displaced by rotating the rotation handle 38. On the other hand, a support rod 43a of a skid 43 is provided at the other end of the support arm 41, which is fixed to the tip of the main frame 6 and projects forward, through a support tube 42, so that the support rod 43a of the skid 43 can be adjusted up and down. A potentiometer 44 is provided on the rear upper surface, and a sensor rod 45 extending rearward from the potentiometer 44 is rotatably provided. A cord 46 connected to the potentiometer 44
is electrically connected to a solenoid valve of a hydraulic system (not shown) provided on the tractor 1. The skid 43 and the sensor rod 45
is provided behind the wheel 1b of the tractor 1, and the sensor rod 45 is weakly urged downward by a spring (not shown). A support frame 4 is attached to the main frame 6 behind the top mast 7.
7 is erected, and the rear end of a hydraulic cylinder 48 is pivotally connected to the upper end of this support frame 47, and the tip of the piston 48a of this hydraulic cylinder 48 is at the upper end of the top mast 7 and at the pivot point 2b with the top link 2.
It is pivoted to. Note that a clutch mechanism may be interposed in the power transmission system of the swing mechanism 21. Next, the operation of the above embodiment will be explained. The soil improvement work machine 5 is attached to the rear of the tractor 1 via a three-point link hitch mechanism 4, and the ground contact height is adjusted by rotating a rotary handle 38 and rotating a support wheel 35 around a shaft rod 33. By determining the soil insertion depth of the fumarole 12 and adjusting the ground height of the skid 43 so that it is approximately equal to the ground contact height of the support wheel 35, the traction line DL (correct traction direction) of the fumarole 12 is determined. ), that is, the moving direction is adjusted to be horizontal. In this state, the vertical movement of the three-point link hitch mechanism 4 is made free, and the tractor 1 is
Power is transmitted from the PTO shaft 1a to the input shaft 8a via the propeller shaft 13, and when the compressor 8 is driven and towed by the tractor 1, the fume gas 12
is towed and moves forward until the supporting wheels 35 touch the ground at a depth that is a set depth into the soil. At this time, the rotation of the input shaft 8a causes the pulley 30 to rotate, which rotates the rotating shaft 24 via the belt 31 and the pulley 29, and the swinging mechanism 21 operates to rotate the shaft 20 through the swinging arm 18. The cutting blade 17 is swung back and forth with a small stroke, the soil is cut by the blade edge 17a, and the traction resistance of the following fumarole column 11 is significantly reduced. The air compressed by the compressor 8 is stored in a main tank 9, and is further sent from the main tank 9 to a sub-tank 14 where it is stored in pressure. One batch of compressed air stored in the sub-tank 14 is sent to the fumarole 16 of the fumarole 12 via the air supply pipe 15 and is vigorously blown into the soil, causing cracks in the deep soil to perform deep plowing. At this time, the cutting blade 17
Since the compressed air is swung back and forth at a far rear position, the compressed air ejected from the jet nozzle 16 does not blow upward through the gap cut by the cutting blade 17.
Such fumarole operation is performed intermittently by switching and controlling the switching valve by the control mechanism as the aircraft advances, and deep plowing work is performed in the soil through which the fumarole 12 has passed. During such deep plowing work, if the field surface GL is flat (almost horizontal), the tractor 1 and the soil improvement work equipment 5 maintain an almost constant posture via the three-point hitch mechanism 4, as shown in Fig. 1. Move and drive.
The sensor rod 45 slides on the field surface leveled by the skid 43, and is connected to the hydraulic cylinder 4 without moving up and down.
No. 8 does not expand or contract, and the fumarole 12 advances through the soil while keeping its traction line DL moderately horizontal, resulting in low traction resistance and performing stable fumarole work. However, there are large undulations in the field surface GL,
As shown in FIG. 4, when the relative movement posture of the tractor 1 and the soil improvement work equipment 5 changes, the positions of the pivot points 2a, 2b, 3a, 3b of the three-point linkage mechanism 4 and the pivot points of the support frame 47 and the hydraulic cylinder 48 change. Fulcrum 4
7a, the forward and backward posture of the soil improvement work machine 5 changes, and the traction line DL of the fumarole 12 changes upward or downward (as shown by the dotted line). The back and forth tilting is achieved by rotating the sensor rod 45 by the support rod 41 and skid 43, which tilt together, and the potentiometer 4
4, the signal is transmitted to the solenoid valve via the cord 46 to operate it, and the piston 48a of the hydraulic cylinder 48 is expanded and contracted to move the soil improvement work machine 5 to the lower link hitch pin via the support frame 47. 3a as the center, and the fumarole 1
The traction line DL in step 2 is corrected so that it is almost parallel to the field surface GL to avoid misalignment. As a result, the traction resistance of the fumarole 12 is small, and a large load is not applied to the attachment base of the fumarole 12 to the fumarole strut 11, and the hole formed by the fumarole 12 becomes larger vertically, causing the fumarole orifice. This prevents the compressed air ejected from the hole 16 from blowing backward through the hole. The control of the forward and backward posture of the soil improvement work machine 5 will be explained in more detail with reference to FIG. 4.
There is a mountain Y on the field surface GL, and the self-propelled vehicle 1 and the soil improvement work machine 5 act in a direction to move away from each other at the three-point link hitch mechanism 4 position, and the soil improvement work machine 5 tilts forward. Then, the traction line DL of the fumarole 12 tries to change in the direction of the dotted arrow, but at this time, the sensor rod 45 rotates in the downward direction, extends the piston 48a of the hydraulic cylinder 48, and changes the movement posture of the soil improvement work machine 5. Correct the traction line of fumarole 12
DL is corrected in the direction of the solid arrow, thus preventing compressed air from blowing through. In addition, b is a case where there is a valley T on the field surface GL, and in this case, the self-propelled vehicle 1 and the soil improvement work machine 5
act in the direction of approaching each other at the three-point link hitch mechanism 4 position, the soil improvement work equipment 5 tilts backward, and the traction line DL of the fumarole 12 attempts to change in the direction of the dotted arrow, but at this time The sensor rod 45 rotates in the upward direction to contract the piston 48a of the hydraulic cylinder 48, corrects the moving posture of the soil improvement work equipment, corrects the traction line DL of the fume 12 in the direction of the solid arrow, and moves the compressed air. Prevent blow-through. In the above embodiment, the cutting blade 17 is not limited to being able to swing back and forth, but may be configured to move up and down, or in a combination of up and down, and back and forth. Also, skid 43, sensor rod 4
5. Potentiometer 44 etc. are soil improvement work equipment 5.
It may be provided at other positions where changes in the moving posture of the sensor can be detected.

【Effect of the invention】

As explained above, according to the self-propelled pneumatic soil improving machine of the present invention, since the cutting blade that reciprocates in front of the fumarole column fixed to the machine body is provided,
The traction resistance of the blower strut can be significantly reduced. Further, since the cutting blade is provided at a position remote from the position of the fumarole, the compressed air ejected from the fumarole does not blow by, and stable deep plowing work can be performed. Furthermore, since the traction resistance of the fume struts is reduced, the required power is reduced, and the self-propelled vehicle that tows the soil improvement work machine can be downsized.

[Brief explanation of drawings]

Figure 1 is an overall side view of the self-propelled pneumatic soil conditioner, Figure 2 is a vertical side view of the swing mechanism, and Figure 3 is the
A sectional view taken along the - line in the figure, and FIG. 4 is an explanatory view of the operation. 1... Riding type tractor, 2... Totsuprinku,
2a, 2b... Pivot point, 3... Lower link, 3a
...Lowering connection pin, 4...Three-point link hitch mechanism, 5...Soil improvement work machine, 6...Main frame, 6a...Bracket, 7...Top mast, 8...Compressor, 9...Main tank, 10...
...Mounting member, 11... Fumarole strut, 11a... Thin width part, 12... Fumarole, 12a... Base, 12b...
...Tapered part, 12c... Neck, 12d... Pointed part, 13... Propeller shaft, 14... Sub-tank, 15... Air supply pipe, 16... Fumarole, 17...
...cutting blade, 17a...blade edge, 18...swing arm, 19...bracket, 20...shaft, 21...
Swing mechanism, 22... Swing plate, 23, 27...
... Spherical bearing, 24 ... Rotating shaft, 25 ... Eccentric cam, 26 ... Bearing, 28 ... Bearing member, 2
9, 30...Pulley, 31...Belt, 32...
Bracket, 33... Axis rod, 34... Support arm, 35... Support wheel, 36... Support frame, 3
7... Rotating piece, 38... Rotating handle, 39...
Screw rod, 40...Screw cylinder, 41...Support arm,
42...Support tube, 43...Skids, 43a...
Support rod, 44... Potentiometer, 45... Sensor rod, 46... Cord, 47... Support frame, 47a... Pivotal point, 48... Hydraulic cylinder, 48... Piston, GL... Field surface, DL …
...Towing line of fumarole, Y...peak, T...trough.

Claims (1)

[Claims] 1. A soil improvement work machine is mounted on a self-propelled vehicle so that it can be raised and lowered, and the soil improvement work machine includes a compressor, a tank for storing compressed air pressurized by the compressor, and a compressed air supplied from the tank. A fumarole that intermittently blows air into the soil, a fumarole strut fixed to the fuselage so as to protrude long downwards from the fuselage with this fumarole at its lower end, and a fumarole at the front side along the fumarole strut. a cutting blade that is provided rearward from the mouth and reciprocates, the cutting blade reciprocates while being inserted into the soil together with the fumarole and the fumarole support;
A self-propelled pneumatic soil improvement machine characterized by cutting soil in front of a fumarole support and behind a fumarole of a fumarole.