JPH0441562B2 - - Google Patents

Description

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

The present invention relates to a soil improvement work machine, and more specifically, the present invention relates to a soil improvement work machine that has a pressure accumulation function that intermittently blows pressurized air into the soil from a compressor driven by receiving power from a tractor.
This invention relates to a soil improvement machine that can be used as a pressurized air supply source for external equipment.

[Conventional technology]

As a typical soil improvement machine, it moves through the field while being towed by a tractor, and intermittently blows out pressurized air from the fumarole at the lower end of the knife body to penetrate the deep layers of the soil. Examples include those that improve soil by forming cracks.

[Problems to be solved by the invention]

Field work using pressurized air is not limited to soil improvement work; for example, it can be used to select air-driven pruning schedules, or as a pressure source to pressurize chemical solutions when injecting them into the soil. An example of this is the chemical liquid injection work. In this type of work, a compressor is brought into the field and the pressurized air obtained by this is supplied to the working machine using a flexible tube, and it is essential to have a compressor available. However, in the above-mentioned soil improvement work machine, the capacity of the compressor is kept in a dormant state except during soil improvement work. This is because when a compressor and an air tank included in a soil improvement work machine are used as a source of pressurized air, the knife body cannot be kept in a stored position, making it impossible to smoothly transmit power. Also, if the drain valve opens or the intermittent drive valve operates when the knife body is in the retracted position,
The pressure accumulation function deteriorated or compressed air spewed out intermittently from the fumarole, which was dangerous for workers, and the function could not be used.

[Means to solve the problem]

The present invention prevents compressed air from blowing out from a fumarole in an inactive state, and allows the compressor installed in a soil improvement work machine to be used as a pressurized air supply source when performing other work in the field. purpose. In order to achieve the objective, the soil improvement work machine of the present invention includes a compressor mounted on a work machine frame, an air tank that stores pressurized air supplied from the compressor, and an upper end of which is attached to the work machine frame with a pivot point. a knife body whose lower end rotates between a hanging state and a horizontal state; a fume gas provided at the lower end of the knife body; and a pressurized air supply pipe connecting the knife body to the air tank. , an intermittent drive valve provided in the middle of the pressurized air supply pipe, a coulter provided movably up and down on the working machine frame at a position in front of the knife body in a hanging state, and ground pressure applied to the coulter. a fume control mechanism that detects that the intermittent drive valve is not in operation and sets the intermittent drive valve to a non-operating state, and a connection device provided on the air tank, and when the fume work by the fume body is not performed, the fume control mechanism The pressurized air in the air tank is supplied to external equipment through a device. A drain valve is provided that is closed when the knife body is in the intermediate position, so that compressed air can be used for external equipment without opening the drain valve. In addition, a stand that can be raised and lowered and a gauge wheel that can be moved up and down are provided on the front left and right sides and rear left and right sides of the work machine frame, respectively, and when the knife body is in an intermediate state between the horizontal state and the vertical state, the stand and the gauge wheel It is also possible to hold the coulter in a state where no ground pressure is applied.

【Example】

Embodiments of the present invention will be described below with reference to the accompanying drawings. First, in the figure, reference numeral 10 indicates the entire working machine, and this working machine 10 is formed by a working machine frame 11 and a mast 12 erected at the front end of the working machine frame 11. A mounting seat 12a for the top link _T1 is formed at the upper end, and the lower end of the mast 12 is expanded in the width direction of the work equipment frame 11 and fixed to the work equipment frame 11. The mounting pin 12b of the lower link _T2 is provided protrudingly. A compressor 13 is mounted near the rear end of the work equipment frame 11, and the pressurized air compressed by the compressor 13 is transferred to a hollow air tank 14 which also serves as a rear horizontal member forming the work equipment frame 11. The compressor 13 is connected at one end to the PTO shaft of the tractor, and is driven by receiving power transmitted through a drive shaft 15 that can be expanded and contracted by a spline 15a and bent by a universal joint 15b. be done. Further, in the center of the air tank 14 at the rear end of the work machine frame 11, there is a mounting seat 16 formed of a pair of plate pieces, and the upper end of a knife body 20, which will be described later, is attached to this mounting seat 16. The knife body 20 is pivotally connected by a pivot 25 so that the lower end portion of the knife body 20 can rotate forward in the direction of work progress along a vertical plane. This knife body 20 has a blade edge 21 on the front edge that facilitates cutting, and has a chisel function and a cannonball-shaped fume 22 attached to the lower end, and operates by sensing the tank internal pressure from the air tank 14. Air can be ejected from the nozzle hole 22a of the fume gas body 22 through the intermittent drive valve 23, the flexible supply pipe 24, and the pipe line inside the knife body 20. The knife body 20 is pivotally attached to the mounting seat 16 by a pivot 25, and has a pin hole 26 on the upper end side of the pivot point, and has a pin hole 26 that is inserted into one of two fixing holes 16a and 16b pre-drilled in the mounting seat 16. By inserting the fixing pin 27, a holding mechanism is formed which can hold either the working posture or the storage posture. The fixing holes 16a and 16b are arranged on a concentric circle centered on the pivot point, and the fixing hole 16a allows the knife body 20 to maintain a working posture, and the fixing hole 16b allows the knife body 20 to maintain a stored posture. . On both sides of this knife body 20, support arms 31 are attached to a bearing tube 31a provided on the work machine frame 11.
The depth of the knife body 20 can be selected by determining the length of the downward projection of the gauge wheel 32 from the working machine frame 11, the height of which can be adjusted by moving up and down. Further, a rolling coulter 33 is provided in front of the knife body 20 in the direction of movement, and a support arm 34 of this rolling coulter 33 is bent in an L shape when viewed from the front (back), and its lower end is connected to the shaft. The supporting arm 34 supports the rolling coulter 33, and can be freely inserted into and removed from a bearing portion 36 provided at the free end of a swinging arm 35 pivotally mounted near the front end of the working frame 11. This swinging arm 35 is supported by a spring 35
a prevents the rolling coulter 33 from falling downward due to its own weight. This swinging arm 35 has a function of operating a micro switch 37 provided on the working frame 11 to stop the ejection of pressurized air from the fumes 22 at the lower end of the knife body 20 when the knife body 20 is not in operation. It has This micro switch 37 controls the opening/closing operation of the intermittent drive valve 23, and when the rolling coulter 33 leaves the ground and the pressure on the micro switch 37 is released, the opening/closing operation of the intermittent jetting valve 23 is stopped and the The supply of pressurized air to body 22 is blocked. That is, the pressure sensing sensor 23 provided in the air tank
A is configured to sense a constant pressure and actuate the intermittent drive valve 23 using the signal, and this sensing signal is transmitted between the micro switch 37 provided on the work machine frame 11 and the swinging arm 35 of the rolling coulter 33. The control mechanism is configured to restrict the operation of the intermittent drive valve 23 by intermittent signals by disconnecting the connection. As another embodiment, instead of the electric circuit configuration of the previous embodiment, the pressure of the compressed air in the air tank may be used. As shown in FIG. 9, the configuration in this case is that air piping is connected to the fume gas 22 provided at the lower end of the knife body 20 via an intermittent drive valve 23 that operates by sensing a constant pressure from the air tank 14. Piping is connected from the air tank 14 to the intermittent drive balm 23 via a mechanical valve 23B provided on the work equipment frame 11 to connect the swing arm 35 of the rolling coulter 33.
The control mechanism is configured such that the mechanical valve 23B is opened and closed by contact and release, and the intermittent drive valve 23 is in an operable state only in the open state. The swing arm 35 that supports the support arm 34 of the rolling coulter 33 and the bearing section 36 are offset from each other in the direction of movement, and the support arm 34 supported by the swing arm 35 has its lower end bent into an L shape. Because of this, it can be offset from the plane of rotation of the knife body 20. Further, by releasing the fixed state of the support arm 34 from the bearing portion 36 and rotating it half a rotation around the bearing portion 36, the movement trajectories of the rolling coulter 33 and the knife body 20 can be made to coincide with each other. Further, on both sides of the front end of the work machine frame 11, a stand 39 that can be extended and contracted with respect to the ground is inserted into and supported by a support tube 39a. It is now possible to choose the In particular, a drain hole 41 is bored near the mounting seat 16 of the air tank 14, and a mechanical valve 42 as a drain valve is attached to this drain hole 41, and an operator 42a of this mechanical valve 42 protrudes. It is blocked in the state where it is. A roller lever 42 that presses this operator 42a
b protrudes from the upper part of the rotating region of the knife body 20, and the roller lever 4
By pushing 2b, the operator 42a is pushed in indirectly, and the mechanical valve 42 can be opened. Note that the mechanical valve 42 may be opened by the knife body 20 directly pushing the operator 42a. Fixing holes 16a, 1 bored in the mounting seat 16
A fixing hole 16x is further drilled in the middle of 6b,
The knife body 20 can maintain a state (intermediate position) just before it takes the stored position, in other words, just before pressing the operator 42a of the drain valve. The air tank 14 is provided with a supply port 43 for supplying pressurized air to the outside.
A connector 45 for connecting a supply pipe 44 is attached to 3. This connector 45 includes a supply pipe 4
A one-way automatic opening/closing valve is used that opens only when 4 is connected. Next, the storage state of the knife body in the soil improvement work machine according to the present invention will be explained. First, in order to store the knife body 20, the top link T ₁ ,
The soil improvement work machine attached to the tractor by the lower link T ₂ is lifted by the lifter, and after the knife body 20 is pulled out to the soil surface, the fixing pin 27 is extracted from the knife body 20 and the knife body 20 is
are pivoted only by the pivot 25. From this state, by rotating the knife body 20 and inserting the fixing pin 27 into the fixing hole 16b again at a position where its upper end is lower than the fixing hole 16a, the knife body 20 returns to its original position by its own weight. The knife body 20 is kept in the stored state (completely stored state in FIG. 7). Thereafter, the stand 39 is lowered and extended to a length that allows it to touch the ground, and the pin 38
By replacing it, the extended state of its length is maintained. Furthermore, the supporting arm 3 of the rolling coulter 33
4 by a half turn along the horizontal plane, the knife pair 20 is offset from the storage space. At this time, the soil improvement work machine is in a stable state on the ground due to the stand 39 and the gauge wheel 32 (FIGS. 3 and 4). In parallel with this knife body storage work, the knife body 2
When the knife body 20 is rotated about the axis 25 and gradually approaches the stored state (the stored state in FIG. 6), the knife body 20
Since the roller lever 42b of the mechanical valve 42 protrudes into the rotation area, it comes into contact with the side surface of the knife body 20, thereby pushing the operator 42a. The mechanical valve 42 is opened by pressing the operator 42a, and the drain accumulated in the air tank 14 is spouted out from the drain hole 41 (FIGS. 5 and 6). When operating the compressor 13 to supply pressurized air from the air tank 14 to other equipment, if the drain hole 41 is open, it will be impossible to supply pressurized air. It is necessary to maintain the posture in the region immediately before the storage posture region where the mechanical valve 42 opens. Further, the rolling coulter 33 is separated from the soil surface, and the swing arm 35 is separated from the micro switch 37 provided on the working machine frame 11. That is, by cutting off the internal pressure signal of the air tank, the intermittent drive valve 23 itself stops operating and enters a closed state. The drive source for the compressor 13 is power transmitted by a drive shaft 15 connected to the PTO shaft of the tractor, and
T ₁ , work equipment 10 attached by lower link T ₂
If lifted, universal joint 1
5b bends the drive shaft 15. in this case,
Since the smaller the angle at which the drive shaft 15 is bent, the smoother the power transmission is, an upper limit is set for the amount of lift of the work implement 10 when used as a source of pressurized air. Next, an example of using the soil improvement work machine according to the present invention will be explained. First, the soil improvement work machine 10 is lifted by the lift function of the tractor. This lift height is limited to a state in which the drive shaft 15 that transmits the driving force of the compressor 13 is close to a straight line, in other words, within a range where power can be transmitted smoothly. Since the knife body 20 is pivotally attached to the mounting seat 16 by a pivot 25, the fixing pin 27 is inserted into the fixing hole 16.
If it is removed from a, it can be rotated around the pivot shaft 25, so by aligning the pin hole 26 from the fixing hole 16a to the fixing hole 16x, and passing the fixing pin 27 through the pin hole 26 and the fixing hole 16x, the middle of the knife body 20 can be rotated. Maintain posture. Moreover, the intermediate posture can also be maintained by touching the rear end of the fumarole 22 to the ground. In this intermediate position, the swinging arm 35 is lowered by the weight of the rolling coulter 33, so the micro switch 37 is not pushed but remains open, and the on-off valve 3
8 is closed and pressurized air is not supplied to the intermittent drive valve 23, so even if the pressure in the air tank 14 increases, air will not be ejected. By connecting the supply pipe 44 to the connector 45, the pressurized air stored in the air tank 14 is supplied to a desired device. During the pressurized air supply work, the soil improvement work machine 10 is slightly lifted, but this position is not suitable for the stand 3.
9. By adjusting the height of the gauge wheel 32, it is possible to maintain its position, and in short, the drive shaft 1
5 is close to a straight line, the micro switch 37 and the swinging arm 35 are slightly apart, and the knife body 20 is not in the storage position, it can be used as a pressurized air supply device.

【Effect of the invention】

As is clear from the above description, the soil improvement work machine of the present invention can smoothly transmit power from the tractor, and also has a supply port for supplying pressurized air to the blower of the knife body in the air tank. Since the pressurized air supply port is provided, it can be effectively used as a source of pressurized air to external equipment. Furthermore, since the knife body can take an intermediate position just before opening the drain hole, the drain valve does not have to be opened, and compressed air can be used efficiently. In addition, since the stand and gauge wheel can provide reliable support even when used in a fixed position for long periods of time, there is no risk of the rolling coulter contacting the ground and inadvertently blowing out compressed air from the fumarole, so you can work with peace of mind. It is something that can be done.

[Brief explanation of drawings]

The attached drawings show an embodiment of the present invention, in which Fig. 1 is a side view of the soil improvement work machine in a working state, Fig. 2 is a rear view thereof, and Fig. 3 is a side view showing the knife body in a fully retracted state. , FIG. 4 is a rear view of the same, FIG. 5 is a partially enlarged sectional view of FIG. 2, FIG. 6 is an enlarged rear view of FIG. 4, FIG. 7 is a side view showing various states of the knife body, and FIG. 8 and 9 are explanatory diagrams illustrating different control systems. 10...Work machine, 11...Work machine frame, 1
2...Mast, 12a...Mounting seat, 12b...Mounting pin, 13...Compressor, 14...Air tank, 15...Drive shaft, 16...Mounting seat, 16
a, 16b, 16x... fixed hole, 20... knife body, 21... blade edge, 22... fumarole, 23... intermittent drive valve, 23A... pressure sensing sensor, 23B
...Mechanical valve, 24... Supply pipe, 25...
... Pivot, 31 ... Support arm, 32 ... Gauge wheel, 33 ... Rolling coulter, 34 ... Support arm, 35 ... Swinging arm, 36 ... Bearing section, 37 ...
Micro switch, 38...pin, 39...stand, 41...drain hole, 42...mechanical valve, 43...supply port, 44...supply pipe, 4
5... Connection tool.

Claims (1)

[Scope of Claims] 1. A compressor mounted on a work equipment frame, an air tank for accumulating pressurized air supplied from the compressor, and an upper end pivotally connected to the work equipment frame, which can be in a hanging state or a horizontal state. a knife body whose lower end rotates between; a fume gas provided at the lower end of the knife body; a pressurized air supply pipe connecting the knife body to the air tank; an intermittent drive valve provided therein; a coulter provided on the working machine frame so as to be movable up and down at a position in front of the knife body in a hanging state; A fume control mechanism for inactivating a valve and a connecting device provided on the air tank are provided, and the pressurized air in the air tank is controlled through the connecting device when the fume work by the fume body is not performed. A soil improvement work machine characterized by supplying the water to external equipment. 2. A compressor mounted on a work equipment frame, an air tank that stores pressurized air supplied from the compressor, an upper end of which is pivotally connected to the work equipment frame, and a lower end that rotates between a hanging state and a horizontal state. a knife body provided at the lower end of the knife body, a pressurized air supply pipe connecting the knife body to the air tank, and an intermittent drive valve provided in the middle of the pressurized air supply pipe. A coulter, which is movable up and down on the working machine frame at a position in front of the knife body in a hanging state, detects that ground pressure is not applied to the coulter and brings the intermittent drive valve into a non-operating state. a drain valve that opens and closes in response to the rotation of the knife body; and a drain valve that opens and closes in response to rotation of the knife body; A soil improvement work machine characterized by an open valve. 3. A work machine frame equipped with a stand that can be raised and lowered and a gauge wheel that can be moved up and down on each of the front left and right sides and the rear left and right, a compressor mounted on the work machine frame, and a compressor that stores pressurized air supplied from the compressor. an air tank, a knife body whose upper end is pivotally connected to the working machine frame and whose lower end rotates between a hanging state and a horizontal state, a fume gas provided at the lower end of the knife body, and a knife body that A pressurized air supply pipe connected to the air tank, an intermittent drive valve provided in the middle of the pressurized air supply pipe, and a vertically movable valve provided on the work machine frame at a position in front of the knife body in a hanging state. a coulter, a blow control mechanism that detects that ground pressure is not applied to the coulter and deactivates the intermittent drive valve, a connector provided on the air tank, and rotation of the knife body. a drain valve that opens and closes in accordance with A soil improvement work machine characterized by being held.