JP4615688B2 - Underdrain forming work machine, undercover forming work system and undercover forming method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
  The present invention relates to a culvert forming work machine, a culvert forming work system, and a culvert forming method for forming a culvert inside the soil.Numerous bucket-type drilling claws attached to an endless chain and moving aroundDrilled byGroove spaceNarrow down the lower position of thisGroove spaceThe present invention relates to a culvert forming work machine, a culvert forming work system, and a culvert forming method for forming a space, that is, a so-called culvert with certainty in the middle of the soil.
[0002]
[Prior art]
  A culvert formation device that forms a culvert inside the soil is known in order to drain water remaining on the surface and excess water in the soil layer to form a moisture environment suitable for field cultivation. Japanese Patent Application Laid-Open No. 9-60036 discloses an excavator constituted by a bucket attached to an endless chain, a slitting knife arranged at a rear position in the working direction of the excavator, and a slitting knife. There is described a culvert forming apparatus including a slit constriction body located at an intermediate portion in the height direction and a casing having a radiating hole at a position rearward in the work progress direction of the top end portion of the excavation bucket. During the reversing operation of the excavation bucket, this culvert forming apparatus releases the portion of the discharged soil corresponding to the slit formed by the excavation bucket into the slit formed by the slitting knife, and The intermediate position is squeezed by a slit squeezing body, and the slit is closed to form a culvert. As a result, the upper space of the slit is filled with soil that is released when the excavation bucket changes from ascending to descending, and a lid is applied to prevent the falling of unnecessary soil from the outside. Blockage can be prevented.
[0003]
[Problems to be solved by the invention]
  However, in the culvert forming apparatus described in Japanese Patent Application Laid-Open No. 9-60036, when the fallen soil falls to a position shifted from the upper space of the slit, a mountain is formed at a position different from the upper space of the slit, There was a problem that pastures planted in the field withered due to lack of oxygen.
[0004]
  In addition, in this underdrain formation device, underdrains are formed almost in parallel with the ground surface, so the slope of the underdrain formed is insufficient, and excess water in the soil accumulates in the underdrain, resulting in poor drainage. It was.
[0005]
  In order to solve the above problems, the present inventionBuried in prodigious soilAn object of the present invention is to provide a culvert forming work machine, a culvert forming work system, and a culvert forming method that can prevent the grass and the like from withering and can form a well-drained culvert.
[0006]
[Means for Solving the Problems]
  Therefore, the underdrain forming work machine according to the present invention isThe excavation mechanism unit, the casing, the slitting knife, the slit narrowing body, and the spreader are mounted on the link mechanism of the tractor and pulled in the work progressing direction in the work progress field so that the groove space Excavate to form a culvert. The excavation mechanism section includes a mast attached to the link mechanism of the tractor, an endless chain that is supported by the mast and transmits a driving force from the tractor side and moves around in the height direction, and attached to the endless chain. It has a large number of bucket-type excavating claws that move, and excavates the groove space by scraping the soil when the excavating claws move from the bottom to the top in the working direction of the groove space. The casing is located behind the excavation mechanism in the direction of work progress and is arranged in the height direction.The casing is provided opposite to the reversal position where the excavation claw is moved upward and downward, and the excavated soil discharged from the excavation claw is removed. A discharge port for discharging and a shutter for guiding the excavated soil discharged from the discharge port downward. The slit tailoring knife is located in the groove space excavated by the excavation mechanism unit and is provided in the casing, and the slit space is cut through the groove space excavated by the excavation operation by the excavation mechanism unit. Form. The slit squeezed body is provided at an intermediate position in the height direction in the slit space with respect to the slitting knife and on the rear side in the work progressing direction of the excavation mechanism, and on the rear side in the work progressing direction inside. The slit space is gradually narrowed toward the soil by narrowing down the intermediate position in the height direction of the slit space with the progress of excavation work by the excavation mechanism. Form a culvert. The spreader is a rotating plate that receives driving force from the tractor side and rotates in a horizontal plane, and a vane that diffuses and scatters the excavated soil that is radially formed on the rotating plate and falls on the rotating plate to the ground surface. And is disposed above the soil surface with respect to the casing, and the excavated soil discharged from the discharge port and supplied through the shutter is bounced off and diffused to the ground surface. In the culvert forming machine, the excavated soil can be diffused over a wide area by the spreader, so that it is possible to prevent the pasture from withering due to lack of oxygen, and the diffused excavated soil A part of the slit space is filled so as to cover the upper part of the slit space, so that it is possible to prevent clogging of the culvert caused by unnecessary falling of soil from the outside.
[0007]
  Moreover, the underdrain forming work machine according to the present invention isReceives laser light that draws an inclined surface that is inclined in the working direction relative to a reference plane emitted from laser light emitting means installed at an arbitrary location outside the work target field, and receives light based on the received laser light. Light receiving means for outputting a signal to the tractor side is provided. The culvert forming work machine moves the excavation mechanism part up and down through the link mechanism of the tractor that is operated based on the light reception signal output from the light receiving means, and excavates the groove space. A culvert with a predetermined gradient with respect to the working direction is formed. The culvert forming machine forms a well-drained culvert having a predetermined gradient, thereby forming a field where residual water on the surface and excess water in the soil are drained without stagnation.
[0008]
  The underdrain formation work system according to the present invention isA tractor provided with a link mechanism for attaching the work equipment to pull the work equipment and running so that a predetermined work is executed in the work target field, and a tractor towed by the tractor to the work target field. And a control unit having laser beam emitting means, laser light receiving means, and link driving means. The control unit is installed in an arbitrary place outside the work target field, and is installed in a laser beam emitting unit that emits a laser beam that draws an inclined surface that is inclined in the work traveling direction with respect to a reference plane, and a culvert forming work machine. The laser beam receiving means that receives the laser beam emitted from the laser beam receiving means and outputs a received light signal, and the vertical movement of the link mechanism based on the reception of the received light signal that is installed in the tractor and output from the undercarriage forming machine And link driving means for driving the motor.
[0009]
  The underdrain formation work systemA culvert forming machine includes an excavation mechanism, a casing, a slitting knife, a slit narrowing body, and a spreader. The excavation mechanism is attached to the mast supported by the link mechanism of the tractor, and a large number of bucket-type excavation claws attached to the endless chain that moves around in the height direction with the driving force transmitted from the tractor side The trench space is excavated by scraping the soil when moving from the bottom to the top of the trench wall. The casing is located behind the excavation mechanism in the direction of work progress and is arranged in the height direction.The casing is provided opposite to the reversal position where the excavation claw is moved upward and downward, and the excavated soil discharged from the excavation claw is removed. A discharge port for discharging and a shutter for guiding the excavated soil discharged from the discharge port downward. The slit tailoring knife is located in the groove space excavated by the excavation mechanism unit and is provided in the casing, and forms a slit space in the grooved space excavated as the excavation mechanism unit proceeds. . The spreader is a rotating plate that receives driving force from the tractor side and rotates in a horizontal plane, and a vane that diffuses and scatters the excavated soil that is radially formed on the rotating plate and falls on the rotating plate to the ground surface. And is disposed above the soil surface with respect to the casing, and the excavated soil discharged from the discharge port and supplied through the shutter is bounced off and diffused to the ground surface.
[0010]
  A method of forming a culvert according to the present invention uses a culvert forming work machine including a digging mechanism part, a casing, a slitting knife, a slit narrowing body, and a spreader. The culvert forming work machine is pulled by a tractor. The slit space is excavated by the slit, and the slit space is formed by slitting the slit space to form the slit space, and the slit space is narrowed to narrow the intermediate position in the height direction of the slit space, and the slit space is closed and diffused. A culvert is formed in the work target field by diffusing the excavated soil to the ground surface by a machine. The excavation mechanism is attached to the mast supported by the link mechanism of the tractor, and a large number of bucket-type excavation claws attached to the endless chain that moves around in the height direction with the driving force transmitted from the tractor side The trench space is excavated by scraping the soil when moving from the bottom to the top of the trench wall. The casing is located behind the excavation mechanism in the direction of work progress and is arranged in the height direction.The casing is provided opposite to the reversal position where the excavation claw is moved upward and downward, and the excavated soil discharged from the excavation claw is removed. A discharge port for discharging and a shutter for guiding the excavated soil discharged from the discharge port downward. The slit tailoring knife is located in the groove space excavated by the excavation mechanism unit and is provided in the casing, and forms a slit space in the grooved space excavated as the excavation mechanism unit proceeds. . The spreader is a rotating plate that receives driving force from the tractor side and rotates in a horizontal plane, and a vane that diffuses and scatters the excavated soil that is radially formed on the rotating plate and falls on the rotating plate to the ground surface. And is disposed above the soil surface with respect to the casing, and the excavated soil discharged from the discharge port and supplied through the shutter is bounced off and diffused to the ground surface.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
  Embodiments of the present invention will be described below with reference to the accompanying drawings. First, a preferred embodiment for carrying out the present invention is shown in FIGS. 1 to 14 attached herewith. In these drawings, reference numeral 10 denotes an entire tractor, which is a well-known crawler type, and is an upper link. 11, the undercarriage forming machine 20 is mounted by a link mechanism constituted by the lower link 12, the lift cylinder 13, and the like. The tractor 10 pulls and controls the undercarriage forming machine 20 with the upper link 11 and the lower link 12 as three-point links. As shown in FIG. 1 to FIG. 3, the culvert forming work machine 20 is supported by the link mechanism.Configure excavation mechanismA mast 21 is provided, and a sprocket wheel 22 is provided at the upper end of the mast 21.mastA guide plate 24A extending downward from the guide plate 24A, which will be described in detail later, is provided with a sprocket wheel 23 that forms a pair with the sprocket wheel 22, and shafts 22A, 23A arranged along the working width direction. It is free to rotate.
[0012]
  An endless chain 24 is mounted between the sprocket wheels 22 and 23, and bucket-type excavating claws 25 are attached to the chain 24 at regular intervals. The chain 24 can move along the outer periphery of a guide plate 24A that extends downward from the mast 21, and the guide plate 24A is spaced from the tension side and the slack side of the chain 24. Is prevented, and also functions as a mounting member for the sprocket wheel 23. The sprocket wheel 23 has a shaft 23A attached to the guide plate 24A and is rotatable. Each bucket-type excavation claw 25 is attached in a direction in which the one located on the tension side of the chain is scraped from the bottom to the top with respect to the excavation surface.That is, do not dig.
[0013]
  An input sprocket 26 capable of inputting a driving force is attached to the shaft 22A of the sprocket wheel 22. The shaft of the input sprocket 26 is coaxial with the shaft 22A and is connected to a tractor via a chain 27. 10 can be transmitted (the output sprocket wheel on the tractor side is not shown). Therefore, as the movement of the chain 24, a driving force is applied so that the excavation surface becomes the tension side, in other words, the tension side moves in the upward direction and the slack side moves in the downward direction.
[0014]
  Further, on the rear surface of the uppermost end portion of the mast 21, in other words, on the rear side in the work progress direction, a discharge port 28A for discharging the soil excavated by the excavation claw 25, and the discharge port 28A discharged from the discharge port 28A. A casing 28 having a shutter 28B for guiding the soil downward is attached. Therefore, when the bucket-type excavation claw 25 reverses from the upward movement to the downward movement, the excavated soil can be discharged from the discharge port 28A and guided downward by the shutter 28B.
[0015]
  Most of the discharged soil is diffused to the ground surface, and a part thereof is filled in the upper part of the slit space S described later, and the slit space S can be in a state of being covered with a lid H.
[0016]
  In addition,mast21IsWork progress directionofBackwardIn addition,A knife 31 is arranged along a plane including the guide plate 24A.Yes.This knife 31,The slit space S formed by the excavation claw 25 has a function of cleaving, and the slit space S formed by excavation is closed by a fastening body 32 that fastens the slit space S arranged at the intermediate position of the knife 31 from both sides. .
[0017]
  That is, the knife 31 is,A slit-shaped space, which is an excavation space formed in the soil, is formed into a thin, vertically long shape suitable for crawling this space.Refinement body32 is attached. As shown in FIG. 4 and FIG.,The knife 31 is in the middle position of the part located in the soil, has a gate shape in the rear view, and the work progress direction in the plan viewofAs you go backwardsGraduallyIt has a deformed trapezoidal shape with a narrow width, and is formed by side plates 32B that are bent at right angles to both sides of the flat plate 32A.The slit throttling body 32 isFlat plate32AIs substantially trapezoidal in terms of function, the space surrounded by the side plates 32B and 32B becomes gradually narrower toward the back in the work progressing direction.
[0018]
  Further, as shown in FIG. 1, a space forming plate 33 having a substantially circular shape in the work progress direction is attached near the lower end of the knife 31, and the space excavated by the excavation claw 25 can be further expanded. It can be done. The lowermost end portion of the space forming plate 33 is at the lowermost end portion of the movement trajectory of the chain 24, and when the work process is observed from the back, the excavation claw 25 is moved to the space forming plate.33It appears to protrude further downward.
[0019]
  Further, as shown in FIGS. 6 to 8, the working direction of the mast 21ofA spreader 40 is disposed behind. The spreader 40 includes a support member 41 attached to the casing 28, a gear box 42 attached to the support member 41, a rotating plate 43 connected to a shaft 42A of the gear box 42 and rotating in a horizontal plane. It has. A sprocket wheel 44 is attached to the shaft 42B of the gear box 42, and a sprocket wheel 45 is attached to the shaft 22A. And sprocket wheel4445, an endless chain 46 is mounted, and the chains 24 and 46 are interlocked by a drive source on the tractor 10 side. Further, as shown in FIG. 9, four vanes 43 </ b> A are radially attached at equal intervals around the shaft 42 </ b> A to the rotating plate 43 and fall on the rotating plate 43.ExcavationThe soil T can be jumped to the ground surface by the vane 43A.
[0020]
  Further, as shown in FIG. 1, at a suitable position of the mast 21, that is, at a position corresponding to the position directly above in the side view, laser light reception for receiving laser light as an inclined surface signal L inclined with respect to the reference plane. The part 51 is attached via a pole 51X. Then, the culvert forming work machine 20 is moved up and down by the output of the tractor so that the laser light receiving unit 51 is always positioned in the inclined surface drawn by the laser beam, that is, the inclined surface signal L. This operation will be described in detail later.
[0021]
  As shown in FIG. 10, a bell crank is connected to the lower link 12 included in the tractor 10 via a lift rod 13, and a rod of the lift cylinder 16 is connected to a lift arm 15 extending to the opposite side of the pivot point 14. 16A is connected. The lower link 12 can be moved up and down via the lift arm 15 and the lift rod 13 by the expansion and contraction of the lift cylinder 16 constituting such a lift mechanism.
[0022]
  The lift cylinder 16 is expanded and contracted by an inclined surface signal L from the laser light emitting unit 53 received by the laser light receiving unit 51, and the switching valve 55 and the flow rate control valve 57 are controlled by the hydraulic pressure from the hydraulic pump 56 provided in the tractor 10. Driven through. That is, the inclined surface signal L received by the laser light receiving unit 51 is input to a control circuit 54 including a control microcomputer, and the switching valve 55 is controlled to be switched based on the control signal output from the control circuit 54, so that the flow rate is increased. The opening degree of the control valve 57 is controlled. In addition, the laser emission part 53 is arrange | positioned in the arbitrary positions outside a work object farm field, and can draw a predetermined inclined surface in the air.
[0023]
  Next, the state of the culvert formation work using the culvert formation working machine according to the present invention will be described with reference to FIG. First, in a farm target field where a culvert is formed, the culvert forming work machine 20 attached to the tractor 10 is lowered by operating the lift mechanism of the tractor 10, and the driving force from the tractor 10 is sprocketed via the sprocket wheel 26. The tractor is self-propelled while being supplied to the shaft 22A of the wheel 22. Initially, the excavation claw 25 does not pierce into the soil inside the field, but gradually moves into the soil by the movement of the tractor 10, whereby the excavation claw 25 group further submerges while excavating the soil in the field, to a predetermined depth. Reach. At this time, the excavated soil is lifted in the upward stroke, and when the excavation claw 25 changes from the upward stroke to the downward stroke, the soil loaded on the excavation claw 25 is opened in the casing 28.DischargeIt is discharged downward by the shutter 28B through the opening 28A. And the soil which falls on this rotating plate 43 is splashed off by the vane 43A formed on the rotating plate 43, and is spread | diffused on the ground surface.
[0024]
  Since the slit space S formed after the slitting knife 31 passes is excavated and formed in the farm field in the substantially vertical plane along the work progressing direction (FIG. 11). DiffusedExcavationA part of the soil T (FIG. 14) falls in an arc. thisExcavationThe soil T falls into the slit-shaped space S formed after the excavation claw 25 and the slitting knife 31 pass, and closes as if the upper space of the slit space S is covered with the lid H. (FIG. 13). At this time, in more detail,ExcavationAfter the excavation claw 25 group passes through the portion before the soil T falls, the slit space S is provided by the slitting knife 31, and the slit opening K is opened on the field surface. (FIG. 11).
[0025]
  Therefore, the above will be diffusedExcavationThe soil T is diffused into the space behind the slitting knife 31 and is diffused into the slit space S.ExcavationA part of the soil T drops and accumulates with the lid H applied, and closes the upper portion of the slit space S. Moreover, in the middle of the slit space S, for example, in a general peat land, the slit narrowing body 32 at a depth of about 70 centimeters from the ground surface to the basement moves along with the movement of the tractor 10. The peat soil is tightened from both sides of the space S so that the slit space S is closed.
[0026]
  That is, when the culvert forming machine 20 according to the present invention moves, the tractor 10 has the slit squeezing body 32, and the space between the side plates 32B and 32B forming the slit squeezing body 32 has a width toward the work progress rear side. Since the slit space S is narrowed, the slit space S is squeezed from both sides to be blocked and diffused.ExcavationThe portion immediately below the lid H formed by a part of the soil T, in other words, the upper side of the portion squeezed by the slit squeezing body 32 is diffused.ExcavationA culvert that is blocked by the soil T and prevents entry of soil from the outside is formed (FIG. 13B).
[0027]
  As a result, a part of the slit space and a culvert due to the passage space of the space forming plate 33 of the slitting knife 31 are formed below the narrowed portion. Since this culvert is isolated from the outside, it will not be blocked by the invading soil, and will maintain a space as a culvert for a long period of time, so that the water contained in the peatland can ooze out and drain. is there.
[0028]
  When the above work is performed, the lift cylinder 16 shown in FIG. 10 is controlled by the laser light receiving unit 51 standing on the mast 21 receiving the inclined surface signal L emitted from the laser light emitting unit 53. Is called. That is, the expansion and contraction of the lift cylinder 16 is controlled so that the laser light receiving unit 51 is positioned in the plane drawn by the inclined surface signal L, for example, the inclined surface.FormationThe height of the work machine 20 is controlled.
[0029]
  As described above, the culvert forming work machine 20 is provided with the laser light receiving unit 51 that receives the inclined surface signal L emitted from the laser light emitting unit 35 standing at an appropriate location outside the work target field. Thus, if the laser light receiving unit 51 is always located in the inclined surface depicted by the inclined surface signal L, the underdrain forming work machine 20 will work in a certain inclined surface, and form a underdrain having a gradient in the soil. can do.
[0030]
  Specifically, when the laser light receiving unit 51 deviates from the inclined surface signal L from the laser light emitting unit 53, a control signal from a control circuit (control box) 54 is sent to the lift mechanism of the tractor 10, and this signal Therefore, the hydraulic circuit is switched. That is, a signal for lowering the laser light receiving unit 51 is output so that the inclined surface signal L can be received, the switching valve 55 is switched, and the lift cylinder 16 is extended. At this time, pressure oil is applied in a direction to extend the rod 16A of the lift cylinder 16 so as to control the posture in a direction in which the front end portion of the culvert forming work machine 20 is pushed down, whereby the lift arm 15 is rotated and lifted. By pushing the rod 13 and lowering the lower link 12, the posture is controlled by pushing down the front end portion of the culvert forming machine 20 to a position where the laser light receiving unit 51 can receive the inclined surface signal L.
[0031]
  In other words, when the laser light receiving unit 51 deviates from the inclined surface by the inclined surface signal L drawn by the laser light emitting unit 53 and the height of the underdrain forming work machine 20 changes, the laser light receiving unit 51 moves from the inclined surface. In the control box (control circuit) 54, the control amount is calculated by calculating whether or not there is a deviation, a signal corresponding to the correction value is input to the hydraulic circuit of the lift mechanism provided in the tractor 10, and the lower via the lift rod 13. The link 12 is controlled and driven. Thereby, the posture of the underdrain forming work machine 20 is controlled, that is, the laser light receiving unit 51 can be positioned on the aforementioned inclined surface. Thereby, as shown in FIG. 14, the underdrain which has a gradient (inclination angle (theta)) can be formed in soil.
[0032]
【The invention's effect】
  As is clear from the above description, according to the present invention, excavationmeansDrilled byShiTheExcavationDirtBy spreaderBecause it spreads to the ground surface, thisExcavationThe soil becomes a mountainGrassCan prevent the throat from withering,ExcavationSince a part of the soil fills the upper space of the slit space and covers it, the entry of the soil from the outside is prevented, and a long-lasting underdrain can be formed. Also, according to the present invention, the tractorUnderdrain machineWhile pulling up and down, move this up and downUnderdrain machineDrilling the soil byPredetermined in the excavation directionSince a culvert with a slope is formed, drainage of the culvert can be improved.
[Brief description of the drawings]
FIG. 1 is a side view of a tractor equipped with a culvert forming machine according to the present invention.
2 is a rear view of the working state shown except for the knife and the subsequent parts in FIG. 1;
FIG. 3 is a rear view of the excavation mechanism portion.
FIG. 4 is a perspective view of a slit narrowing body.
5 is a cross-sectional plan view of the slit narrowing body of FIG. 4 during operation.
FIG. 6 is a side view of a spreader portion.
FIG. 7 is a plan view of a spreader portion.
FIG. 8 is a front view of a spreader portion.
FIG. 9 is an overall view of a rotating plate, (A) is a plan view, (B) is a front view, and (C) is a side view.
FIG. 10 is an explanatory diagram schematically illustrating a link mechanism of a tractor.
FIG. 11 is a cross-sectional view of a slit space formed by excavation claws.
FIGS. 12A and 12B are explanatory diagrams of a work process by the slit narrowing body, where FIG. 12A is a plan view and FIG. 12B is a cross-sectional view.
FIGS. 13A and 13B are explanatory views showing a state after forming a slit space narrowed down by a slit narrowing body, where FIG. 13A is a plan view and FIG. 13B is a cross-sectional view.
FIG. 14 is a side view showing a working state of the underdrain working machine of the present invention.
[Explanation of symbols]
  10 Tractor
  11 Upper link
  12 Lower link
  13 Lift rod
  14 pivot points
  15 Lift arm
  16 Lift cylinder
  16A Rod
  20 Underdrain machine
  21 Mast
  22 Sprocket wheel
  23 Sprocket Wheel
  24 Endless Chain
  24A guide plate
  25 Drilling claws
  26 Input sprocket wheel
  31 slitting knife
  32 Slit refiner
  40 Spreader
  43 Rotating plate
  43A Vane
  51 Laser receiver
  51X pole
  54 Control circuit
  55 Switching valve
  56 Hydraulic pump
  57 Flow control valve
  H lid
  S slit space
  K opening
  TExcavationsoil
  L Inclined surface signal

Claims (5)

In the underdrain forming work machine that excavates the groove space by being attached to the link mechanism of the tractor and pulled in the work progress direction in the work target field,
A mast mounted on the link mechanism of the tractor, an endless chain supported by the mast and circulated in the height direction by transmitting a driving force from the tractor side, and attached to the endless chain and circulated. A plurality of bucket-type excavation claws, and an excavation mechanism section excavating the groove space by scraping soil when the excavation claws move from the bottom to the top in the work progress direction of the groove space;
The excavation soil disposed behind the excavation mechanism in the working direction and disposed in the height direction is provided opposite to the reversal position of the excavation claw ascending and descending movement, and excavated soil discharged from the excavation claw A casing having a discharge port for discharging and a shutter for guiding the excavated soil discharged from the discharge port downward;
Located in the groove space excavated by the excavation mechanism section and provided in the casing, a slit space is formed across the groove space excavated as the excavation mechanism section excavates. Slitting knife,
It is provided at an intermediate position in the height direction in the slit space with respect to the slit gripping knife and on the rear side in the work progressing direction of the excavation mechanism part, and toward the rear side in the work progressing direction inside. and closing the slit space by progressively narrower as the the a space with the progress of the drilling operation by the drill mechanism restrictor intermediate position in the height direction of the slit space narrower write Mukoto Te A slit throttling body that forms a culvert in the soil ;
A diffuser that is disposed above the soil surface in the casing, and diffuses the excavated soil discharged from the discharge port and supplied through the shutter to the ground surface;
The spreader has a rotating plate that receives a driving force transmitted from the tractor side and rotates in a horizontal plane, and jumps off the excavated soil that is radially formed on the rotating plate and falls on the rotating plate, thereby the ground surface. A culvert forming machine characterized by comprising a vane that diffuses into the surface. Based on the received laser light, the laser light is received which draws an inclined surface inclined in the work advancing direction with respect to a reference plane emitted from laser light emitting means installed at an arbitrary location outside the work target field. Light receiving means for outputting a light receiving signal to the tractor side,
According to the excavation operation of the groove space by the excavation mechanism portion moved in the vertical direction via the link mechanism of the tractor operated based on the light reception signal output from the light receiving means, the inside of the work target field The culvert forming work machine according to claim 1, wherein the culvert is formed with a predetermined gradient with respect to the work progress direction. A tractor comprising a link mechanism for mounting the work equipment, and by pulling the work equipment and running to perform a predetermined work in the work target field;
A culvert forming work machine that is pulled by the tractor to form a culvert in the work target field,
Laser light emitting means for emitting a laser beam that is installed at an arbitrary place outside the work target field and that draws an inclined surface that is inclined in the work progress direction with respect to a reference plane; and installed in the underdrain forming work machine Laser light receiving means for receiving the laser light emitted from the laser light receiving means and outputting a light reception signal; and based on reception of the light reception signal installed on the tractor and output from the culvert forming work machine A control unit configured with link driving means for driving the link mechanism in the vertical direction;
The underdrain forming work machine is
A number of bucket-type excavating claws attached to an endless chain that is attached to a mast supported by the link mechanism of the tractor and moves around in the height direction by transmitting a driving force from the tractor side are arranged in the working direction. An excavation mechanism for excavating the trench by scraping the soil when moving from the bottom to the top of the excavation trench wall;
The excavation soil disposed behind the excavation mechanism in the working direction and disposed in the height direction is provided opposite to the reversal position of the excavation claw ascending and descending movement, and excavated soil discharged from the excavation claw A casing having a discharge port for discharging and a shutter for guiding the excavated soil discharged from the discharge port downward;
A slit cage that is located in the groove space excavated by the excavation mechanism section and is provided in the casing, and forms a slit space across the groove space excavated with the progress of excavation work by the excavation mechanism section. With a knife,
It is provided at an intermediate position in the height direction in the slit space and on the rear side in the work progress direction with respect to the slit tailoring knife, and gradually narrows toward the rear side in the work progress direction. The slit space is closed by narrowing the intermediate position in the height direction of the slit space with the progress of excavation work by the excavation mechanism, and a culvert is formed in the soil. A slit narrowing body to
A diffuser that is disposed above the soil surface in the casing, and diffuses the excavated soil discharged from the discharge port and supplied through the shutter to the ground surface;
The spreader has a rotating plate that receives a driving force transmitted from the tractor side and rotates in a horizontal plane, and jumps off the excavated soil that is radially formed on the rotating plate and falls on the rotating plate, thereby the ground surface. A culvert forming work system comprising: a vane that diffuses into the surface. In the underdrain formation work method for excavating the groove space by being attached to the link mechanism of the tractor and the underdrain formation work machine being pulled in the work progress direction in the work target field,
The underdrain forming work machine is
A number of bucket-type excavating claws attached to an endless chain that is attached to a mast supported by the link mechanism of the tractor and moves around in the height direction by transmitting a driving force from the tractor side are arranged in the working direction. A excavation mechanism for excavating the groove space by scraping the soil when moving from the bottom to the top of the excavation groove wall;
The excavation soil disposed behind the excavation mechanism in the working direction and disposed in the height direction is provided opposite to the reversal position of the excavation claw ascending and descending movement, and excavated soil discharged from the excavation claw A casing having a discharge port for discharging and a shutter for guiding the excavated soil discharged from the discharge port downward;
A slit cage which is located in the groove space excavated by the excavation mechanism part and is provided in the casing, and forms a slit space across the groove space excavated as the work by the excavation mechanism part proceeds. With a knife,
It is provided at an intermediate position in the height direction in the slit space and on the rear side in the work progress direction with respect to the slit tailoring knife, and gradually narrows toward the rear side in the work progress direction. The slit space is closed by narrowing the intermediate position in the height direction of the slit space with the progress of the work by the excavation mechanism, and a culvert is formed in the soil. A slit narrowing body,
A rotating plate that receives driving force from the tractor side and rotates in a horizontal plane; and a vane that is radially formed on the rotating plate and jumps off the excavated soil falling on the rotating plate and diffuses to the ground surface. A spreader that is disposed above the soil surface in the casing and that diffuses the excavated soil discharged from the outlet and supplied through the shutter to the ground surface,
By being pulled by the tractor, a groove is excavated by the excavation mechanism, the slit space is formed by the slit-tearing knife, and a slit space is formed by the slit narrowing body. A method of forming a culvert in the work target field by narrowing the middle position of the squeeze to close the slit space and diffusing the excavated soil on the ground surface by the diffuser. Laser light emitting means for emitting a laser beam that is installed at an arbitrary place outside the work target field and that draws an inclined surface that is inclined in the work progress direction with respect to a reference plane; and installed in the underdrain forming work machine Laser light receiving means for receiving the laser light emitted from the laser light receiving means and outputting a light reception signal; and based on reception of the light reception signal installed on the tractor and output from the culvert forming work machine A controller configured by means for driving the link mechanism in the vertical direction,
By excavating the groove space by moving the excavation mechanism portion of the culvert forming work machine up and down via the link mechanism of the tractor operated based on the light reception signal output from the light receiving means. 5. The method of forming a culvert according to claim 4, wherein the culvert with a predetermined gradient with respect to the work progress direction is formed in the work target field.

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