JP6057483B2 - Underdrain formation device - Google Patents

Description

  The present invention relates to a culvert forming apparatus that forms a culvert in, for example, paddy field or field soil of a field.

  Conventionally, as this type of culvert formation device, a machine frame is connected to a traveling machine body by a connecting mechanism, and a penetration beam is vertically installed in the machine frame so as to be freely swingable in a traveling direction by a shaking mechanism. A bullet body that can form a culvert in the soil in the field is disposed, and the side surface of the penetration groove formed by extending in the vertical direction in the field soil by the penetration beam at a position behind the penetration direction of the penetration beam There is known a structure in which an expansion member capable of forming a vertical opening that opens to the ground surface is provided by an expansion mechanism, and an expansion mechanism for expanding the expansion member is disposed.

  Thus, paddy fields and the like are composed of a plowing layer on the surface, a plowing layer below it, and a core soil layer below, and a penetration beam is made to penetrate into the plowing layer, the plowing layer, and the core soil layer. The side surface of the penetration trace groove formed by breaking the layer to form the penetration trace groove and forming a culvert hole in the core soil layer below it by a bullet body and extending vertically in the field soil by the expansion member The vertical surface that opens to the ground surface is formed by extending the surface, and the ground surface and the underdrain are communicated by the presence of the longitudinal channel and the penetration groove, so that drainage is improved, water management, paddy field cultivation, microorganisms Reproductive activation and growth of deep roots of paddy rice will be improved.

Japanese Patent No. 4101538

  However, in the case of the above-described conventional structure, the penetration groove and the vertical opening are formed on the ground surface of the field with a relatively small cross-sectional area. The opening may be blocked by mud on the surface of the field, and the distance from the ground surface of the field to the culvert may be relatively long, which may reduce the drainage and breathability of the field. ing.

The present invention aims to solve such inconveniences. Among the present inventions, the invention according to claim 1 is that the machine frame is connected to the traveling machine body by a connecting mechanism, and the machine frame is penetrated. The beam is vertically arranged so as to be freely swingable in the traveling direction by a swinging mechanism, and a bullet body capable of forming a culvert in the field soil is disposed below the penetrating beam, and the rear position in the traveling direction of the penetrating beam An extension member that can extend the side surface of the penetration mark groove formed by extending in the vertical direction in the field soil by the penetration beam to form a vertical opening that opens to the ground surface is provided, and the extension member is expanded. An expansion mechanism to be operated is provided, and a pre-processing member capable of discharging the field scattered matter such as sawdust scattered in the field scene to the side of the machine frame is provided at a front position in the traveling direction of the penetration beam. above with taking scooping the field soil in the traveling direction rearward position of the extension member of said machine frame to discharge laterally Mouth path forming position to provide a formable likes member photo groove, said plow member to the retracted position and the working position provided the posture changeable retracting mechanism, those in the field plane in a traveling direction rearward position of the plow member There is provided a stabilizing member that has a contact plate surface that can be contacted and a side contact plate surface that can be contacted with the inner surface of the dug groove, and is capable of suppressing lateral vibration of the plow member. According to another aspect of the present invention, there is provided a culvert forming apparatus which is configured to form a digging groove and to open the vertical opening in the digging groove.

The invention described in claim 2 is characterized in that a side grooved body capable of grooving a side groove is provided in the field scene at a forward position in the advancing direction of the plow member.

The invention described in claim 3 is characterized in that a pre-grooved body capable of grooving a pre-groove in the field scene is provided at a forward position in the traveling direction of the penetration beam.

The invention according to claim 4 is characterized in that a rolling element capable of setting the formation height of the underdrain is provided on the machine frame so as to be adjustable in height.

As described above, according to the first aspect of the present invention, the penetration beam penetrates into the field soil while swinging in the traveling direction to form a penetration trace groove. At the same time, a culvert is continuously formed by the bullet body, and the expansion member arranged at the rear position in the traveling direction of the penetration beam is expanded by the expansion mechanism, and is formed by extending in the vertical direction in the field soil by the penetration beam. In this case, a vertical groove path that opens to the ground surface is formed by extending the penetration trace groove, and in this case, the soil in the field is sprinkled on the rear side in the advancing direction of the expansion member of the machine frame. A plowing member is provided that can be formed to be formed in a vertical groove way forming position and formed into a vertical groove, and the vertical groove is formed in the groove by forming a groove with the plowing member. The lower part of the plow member scoops up the soil in the field as the traveling aircraft progresses. It will be discharged to form a digging groove at the position where the vertical channel is formed, and the opening groove and the vertical channel will open in the digging groove, so that the opening of the digging channel and the vertical channel will be the surface of the field. The water on the surface of the field will reach the culvert through the digging groove and the opening of the vertical channel through the digging groove, from the ground surface of the field to the culvert. The distance of water is shortened, and the drainage and air permeability of the field can be maintained well, so that drainage is improved, water management, dry paddy fields, microbial propagation is activated, and deep roots of paddy rice etc. A pre-processing member that can improve the growth of the plant and that can discharge side scattered matter such as sawdust scattered in the field on the machine frame to the side in the traveling direction of the penetration beam is provided. Because of this, the field scattered matter such as sawdust and stock scattered in the field is discharged to the side by the pretreatment member. The formation resistance of the penetration trace groove by the penetration beam can be reduced, the workability of forming the penetration trace groove can be improved, and the plowing member can be moved to the working position and the retracted position. Since the retracting mechanism that can change the posture is provided, the plowing member can be retreated from the working position to the retreating position when not in use or moving, improving the grooving workability. Side contact plate surface that can contact the farm scene and side contact plate surface that can contact the inner surface of the excavated digging groove at the rear side of the moving direction of the member to suppress lateral vibration of the plow member Since the possible stable member is provided, the lateral vibration of the plow member can be suppressed by the contact plate surface and the side contact plate surface of the stable member, and the digging operation can be performed satisfactorily.

Further, in the invention according to claim 2, since the side groove cut body capable of cutting the side groove in the farm scene is provided at the forward position in the traveling direction of the plowing member, the side groove cut body rotates together. However, the side groove is cut in the field scene in the forward direction of the plowing member. First, the side groove is cut by the side groove cutting body, and the side groove where the plowing member is cut is formed. The soil is scraped and discharged to the side, so that the grooving resistance due to the plowing member can be reduced and an increase in the traction force of the traveling machine body can be suppressed, and the grooving workability can be improved.

Further, in the invention according to claim 3 , since the pregrooving body capable of grooving the pregroove groove in the field scene is provided at the front position in the traveling direction of the penetration beam, Since it advances while rotating, it cuts the pre-groove in the field scene, and the penetration beam penetrates from the back of the pre-groove while oscillating in the direction of travel to form a penetration groove. The formation resistance of the trace groove can be reduced, and the formation workability of the penetration trace groove can be improved.

In the invention according to claim 4 , since the rolling frame capable of setting the height of formation of the culvert is provided on the machine frame so as to be adjustable in height, the surface of the machine frame can be stably run and the surface of the culvert. The formation height can be set.

1 is an overall side view of a first embodiment of the present invention. It is an enlarged side view of the first embodiment of the present invention. It is an enlarged plan view of the first embodiment of the present invention. It is a fragmentary longitudinal cross-sectional view of the first embodiment of the present invention. It is a partial cross-sectional view of the first embodiment of the present invention. It is a partial cross-sectional view of the first embodiment of the present invention. It is a fragmentary longitudinal cross-sectional view of the first embodiment of the present invention. It is a partial cross-sectional view of the first embodiment of the present invention. It is a partial plane sectional view of the example of the 1st embodiment of the present invention. It is a partial plane sectional view of the example of the 1st embodiment of the present invention. It is a partial cross-sectional view of the first embodiment of the present invention. It is a fragmentary top view of the 1st example of an embodiment of the invention. It is a description top view of the use condition of the example of 1st Embodiment of this invention. It is an expansion cross-sectional view of the use condition of the example of 1st Embodiment of this invention. It is a description top view of the use condition of the example of 1st Embodiment of this invention. It is a partial cross-sectional view of the second embodiment of the present invention.

  1 to 16 show an embodiment of the present invention, FIGS. 1 to 15 show a first embodiment, and FIG. 16 shows a second embodiment.

  In the first embodiment shown in FIGS. 1 to 15, reference numeral 1 denotes a traveling machine body. In this case, a tractor is used. As shown in FIGS. Thus, the machine frame 3 is connected to be movable up and down.

  In this case, as shown in FIGS. 1 and 3, the connecting mechanism 2 includes left and right lower links 2a and 2a, upper links 2b, lifting links 2c and 2c, and hydraulic arms 2d and 2d at the rear of the traveling machine body 1. A three-point link mechanism is provided, and the machine frame 3 is connected to the traveling machine body 1 by this three-point link mechanism, and the machine frame 3 is provided so as to be movable up and down by vertically swinging the hydraulic arms 2d and 2d of the three-point link mechanism. It is composed.

  4 is a penetrating beam, and 5 is a shaking mechanism. In this case, as shown in FIGS. 2, 3, and 4, the middle part of the swinging arm 6 can be freely swung by the fulcrum shaft 7 in the machine frame 3. The main shaft 8 is rotatably mounted on the machine frame 3 by bearings 8a and 8a, and a drive mechanism 9 for rotationally driving the main shaft 8 is provided. In this case, as shown in FIGS. As described above, the upper rotating shaft 9a and the lower rotating shaft 9b are horizontally mounted on the machine frame 3 by bearings 11 and 11, and the upper rotating shaft 9a and the lower rotating shaft 9b are drivingly connected by the gear mechanism 10 so that the tractor as the traveling machine body 1 The power take-out shaft 1a and the upper rotating shaft 9a are connected by a universal joint 12, and the lower rotating shaft 9b and the main shaft 8 are connected by driving by a transmission mechanism 13 comprising a chain, and the swing arm 6 and the penetration beam 4 are connected. In this case, an eccentric ring mechanism 14 is interposed, as shown in FIGS. 7, 8, 9, and 10. As the wheel mechanism 14, an eccentric shaft portion 14a is formed between the bearings 8a and 8a of the main shaft 8, and the central axis of the eccentric shaft portion 14a is eccentric by an eccentric amount ε with respect to the rotation axis of the main shaft 8, and the eccentric shaft portion 14a. The bearing 14c on the upper side of the connecting member 14b is fitted, the base shaft 6a of the swinging arm 6 is fitted on the bearing 14d on the lower side of the connecting member 14b, and the swinging arm 6 is connected to the guide rolls 6b and 6b and the guide piece 3a. The swing arm 6 is guided to swing up and down by the rotation of the main shaft 8, and the swing arm 6 is swung up and down around the fulcrum shaft 7 through the eccentric ring mechanism 14. Are attached in the vertical direction, and a casing 15 is attached to the lower end portion of the penetration beam 4 and a bullet-like bullet body 17 is connected by a hook-shaped connecting member 16.

  Thus, as the traveling machine body 1 advances, the penetration beam 4 oscillates in the traveling direction by the oscillation mechanism 5 to penetrate the field soil W to form the penetration trace groove S and to the bullet body 17. Undercut H will be formed continuously.

  Reference numeral 18 denotes an expansion member, and reference numeral 19 denotes an expansion mechanism. The expansion member 18 is arranged at a vertical opening forming position D as a rear position in the traveling direction of the penetration beam 4. 13 is formed so as to be able to form a vertical opening T that opens to the ground surface M by extending one side surface of the penetration trace groove S formed to extend in the vertical direction of FIG. 18 is moved from the non-expanded position K facing backward in the traveling direction to the traveling direction side, and in this case, the forced expansion operation is intermittently performed to the extending position G in the lateral direction that is swung by θ = approximately 60 ° from the backward direction in the traveling direction. It is composed.

  In this case, a bearing cylinder 20 is provided vertically at the rear part of the machine casing 3, a shaft-like body 21 is provided vertically on the bearing cylinder 20 so as to be rotatable in a vertical direction, and a bearing piece 22 is formed on the bearing cylinder 20. The lower end portion of the shaft-like body 21 is attached to the upper portion of the expansion member 18, and the lower portion of the expansion member 18 is rotatably supported by the bearing piece body 22 by the support pins 22 a. A body 18a extends vertically, and an intermittent extension mechanism 19a is used as the extension mechanism 19. In this case, a speed reduction mechanism 23 is attached to the machine casing 3, and the input shaft 23a and the main shaft 8 of the speed reduction mechanism 23 are connected. Are connected by a joint 8b, a turning arm 24 is attached to the output shaft 23b of the speed reduction mechanism 23, a pushing roll 25 is installed on the turning arm 24, and the upper end portion of the shaft-like body 21 can be pressed by the pushing roll 25. The engaging claw member 26 is horizontally projected.

  Accordingly, as shown in FIGS. 12 and 13, the output shaft 23 b of the speed reduction mechanism 23 is rotated by the rotation of the main shaft 8, and the turning arm 24 is horizontally turned in the direction of the arrow by the rotation of the output shaft 23 b. The roll 25 engages and pushes the engagement claw member 26, and the pushing member forcibly rotates the longitudinal direction by a predetermined angle by this push, so that the vertical opening T is formed as shown in FIGS. 13 and 15. When the push roll 25 is separated from the engaging claw member 26 by further rotation, the blade-like projection 18a of the expansion member 18 contacts the side surface of the penetration trace groove S of the penetration beam 4. The protrusion 18a of the expansion member 18 is intermittently reciprocated by a predetermined angle, and the penetration trace groove S is formed by extending in the vertical direction of the field soil W by the penetration beam 4. The vertical side path T that opens to the ground surface M is formed by extending one side surface of the .

  As shown in FIG. 2, reference numeral 27 denotes a plow member, which is disposed at a rear position in the advancing direction of the expansion mechanism 19. The machine frame 3 is formed by the support machine frame 3b and the work machine frame 3c, and is formed on the support machine frame 3b. The work machine frame 3c is pivotally attached, the tip of the U-shaped mounting arm 28 is pivotally attached to the lower part of the work machine frame 3c by the support shaft 29, and the nut body 31 is rotated by the pin 30 to the upper part of the work machine frame 3c. The screw 32 is pivotally attached, and the screw 32 is screwed onto the nut body 31. The nut body 31 is rotated by the rotation of the handle 33, so that the screw 32 can be moved up and down. The lower end of the peg is pivotally attached by a pin 30a, and a plowing member 27 is attached to the mounting arm 28 by a bolt 34. The tip of the plowing member 27 is formed in a tapered cut-off portion 27a and the rear portion is made of cut soil. Formed in the discharge part 27b twisted to discharge sideways That.

  2 and 5, a pre-processing member 35 is disposed at the front position of the penetration beam 4 in the traveling direction, and a plurality of discharge members 35b... Are arranged radially on the mounting disk 35a and the mounting disk 35a. Is attached by a bolt 35c, and a radiating cover 36 is disposed above the pretreatment member 35, and is driven to rotate by the drive mechanism 9.

  37 and 38 are a pair of left and right side groove cut bodies, which are disposed at the forward position of the plowing member 27 in the advancing direction, and as shown in FIG. 11, several blade portions 37a and 38a are formed in the outer peripheral portion. A chassis 39 is attached to the lower end of the work machine frame 3c, an axle 40 is rotatably supported on the axle 39, and a pair of left and right side groove cuts 37, 38 are attached to both the left and right ends of the axle 40 at a predetermined interval. Is configured.

  As shown in FIG. 2, 41 is a retracting mechanism, and is configured so that the position of the plow member 27 can be changed between a working position P and a retracted position Q. In this case, the working machine frame 3c is supported on the support machine frame 3b. 41a is pivotally pivoted, and two insertion holes 41b and 41b are formed in the support machine frame 3b, and an insertion hole 41c is formed in the work machine frame 3c so that the insertion can be inserted into the insertion holes 41b and 41c. The pin 41d is formed, and the working machine frame 3c is fixed at the working position P by inserting the locking pin 41d into the insertion holes 41b and 41c, and the locking pin 41d is removed from the insertion holes 41b and 41c. Is inserted into the other insertion holes 41b and 41c so that the work machine frame 3c is pulled up and rotated to the retracted position Q to be fixed.

  Reference numeral 42 denotes a pre-grooved body. As shown in FIG. 6, a mounting piece 42a is suspended from the machine frame 3, and the pre-grooved body 42 is rotatably attached to the mounting piece 42a by an axle 42b. The pre-groove F is formed at a forward position in the traveling direction.

  Reference numeral 43 denotes a rolling element. In this case, mounting arms 43a and 43a are disposed at both left and right positions of the machine casing 3 so as to be adjustable in height by a height adjusting mechanism 43b. Is configured so that the stable running of the machine casing 3 and the formation height from the surface of the culvert H are set.

44 is a stabilizing member, in this case, as shown in FIG. 14, the inner surface U ₁ of the contact plate surface capable of contacting the field plane a is the stabilizing member 44 44a and digging fringed drilling Tomizo U those A contactable side plate surface 44b is formed, a support piece 45 is projected from the rear surface of the mounting arm 28, a connecting piece 46 is formed on the stabilizing member 44, and the supporting piece 45 and the connecting piece 46 are connected to the connecting pin. 47, thereby connecting the stabilizing member 44 to the mounting arm 28 so as to be slightly swingable.

  Since the first embodiment of the present embodiment has the above-described configuration, the penetration beam 4 is penetrated into the field soil W while swinging in the traveling direction to form the penetration trace groove S as the traveling body 1 advances. At the same time, a culvert H is continuously formed by the bullet 17 at the rearward penetration position of the casing 15, and the expansion member 18 disposed at the rearward position in the traveling direction of the penetration beam 4 is expanded by the expansion mechanism 19. A penetration groove 4 formed by extending in the vertical direction of the field soil W by the penetration beam 4 is expanded to form a vertical groove-shaped vertical passage T opened to the ground surface M. The machine frame 3 is provided with a pavement member 27 capable of scooping the soil of the farm scene a and discharging it to the side to form a digging groove U at the vertical opening formation position D. The digging groove U is provided by the plowing member 27. Is formed so that the vertical opening T is formed in the digging groove U. The lower part of the chair member 27 scoops the soil of the farm scene a and discharges it to the side to form a digging groove U at the vertical opening formation position D. Is opened in the excavation groove U, it is possible to prevent the penetration trace groove S and the opening of the vertical channel T from being blocked by mud in the agricultural scene a. Through U, it will reach the culvert H from the opening of the penetration trace groove S and the longitudinal channel T, and the distance from the ground surface M to the culvert H of the field scene a will also be shortened. It is possible to maintain good water quality, improve drainage, manage water, dry rice fields, activate microbial reproduction, and improve the growth of deep roots of paddy rice and the like.

  In addition, although the lower end of the said vertical port T is set suitably, generally it is desirable to set it in the proximity position of the culvert H which does not reach the culvert H, because the culvert H and the vertical tract T are This is because the soil on the inner surface of the vertical port T may flow into the underdrain H and block the underdrain H when in the communicating state.

  In this case, as shown in FIG. 5, the pretreatment member 35 capable of discharging the field scattered matter E such as sawdust scattered in the field a in the machine frame 3 to the side is provided in the forward direction of the penetration beam 4. Since it is provided at the position, the scattered field E such as sawdust and stock scattered in the field a can be discharged to the side by the pretreatment member 35. In this case, the mounting disk 35a is rotated by the drive mechanism 9. Discharging the field scattered matter E such as swarf and stock scattered in the field a to the side by the pretreatment member 35 that is driven and includes a plurality of discharge members 35b that are radially attached to the mounting disk 35a. The formation resistance of the penetration trace groove S by the penetration beam 4 can be reduced, and the workability of forming the penetration trace groove S can be improved. In this case, as shown in FIG. Side grooves R and R are grooved in the above-mentioned field a in the forward position of the plowing member 27 in the traveling direction. Since a pair of possible left and right side groove cut bodies 37, 38 are provided, the side groove cut bodies 37, 38 advance while rotating together with a pair of left and right side stripes on the field scene a in the forward direction of the plowing member 27. First, the pair of left and right side grooves R and R are cut by the side groove cutting bodies 37 and 38, and the pair of left and right side grooves R and R in which the pavement member 27 is grooved are cut. The soil in between will be scraped and discharged to the side, and the grooving resistance by the plowing member 27 can be reduced and the increase in the traction force of the traveling machine body 1 can be suppressed, improving the grooving workability. be able to.

  In this case, a retracting mechanism 41 capable of changing the position of the plow member 27 between the work position P and the retracted position Q is provided. In this case, the machine frame 3 is supported by the support machine frame 3b and the work machine frame 3c as shown in FIG. The retracting mechanism 41 is provided so that the posture of the work machine frame 3c can be changed between the work position P and the retreat position Q with respect to the support machine frame 3b. The work machine frame 3c can be pulled up and rotated to the retracted position Q by removing the holes from the insertion holes 41b and 41c, so that the work posture and the retracted posture can be easily changed and the grooving workability can be improved. In this case, the pregroove 42 is provided with a pregroove 42 which can groove the pregroove F in the field a in the forward position of the penetration beam 4 in the traveling direction. Advancing while rotating around, cut the pre-groove F in the farm scene a, Since the penetration beam 4 is penetrated after the groove F while swinging in the traveling direction to form the penetration trace groove S, the formation resistance of the penetration trace groove S can be reduced. The workability of forming the grooves S can be improved.

In addition, the machine frame 3 is provided with a roller body 43 capable of setting the height of the undercarriage H so that the height can be adjusted. In this case, mounting arms 43a and 43a are provided at both left and right positions of the machine frame 3 to adjust the height. Since the rolling element 43 is provided on the mounting arms 43a and 43a so as to be adjustable in height by 43b, the rolling frame 43 can be grounded to the ground surface M such as a paddy surface, so that the stable running and darkness of the machine frame 3 can be achieved. The formation height from the surface of H can be set. In this case, the stabilizing member 44 capable of suppressing the lateral deflection of the plow member 27 is provided. The stabilizing member 44 that can suppress runout, can perform a ditching operation satisfactorily, and can suppress the lateral runout of the plow member 27 includes a contact plate surface 44a that can contact the field a and contact Allowed the inner surface U ₁ of the digging fringed drilling Tomizo U A support plate 45 is formed on the rear surface of the mounting arm 28, a connecting piece 46 is formed on the stabilizing member 44, and the supporting piece 45 and the connecting piece 46 are connected to the connecting pin 47. Since the stabilizing member 44 is attached to the mounting arm 28 so as to be slightly swingable, the lateral movement of the plowing member 27 can be suppressed by the stabilizing member 44, and the digging operation can be performed satisfactorily. .

  The second embodiment shown in FIG. 16 shows another structure. In this case, in the first embodiment, a pair of left and right side groove cut bodies 37 and 38 are employed, but in the second embodiment, one on one side. The side groove cut body 37 is used.

  Also in this second embodiment, substantially the same effect as in the first embodiment can be obtained.

  The present invention is not limited to the above-described embodiment, and the traveling machine body 1, the coupling mechanism 2, the vibration mechanism 5, the expansion member 18, the expansion mechanism 19, the plow member 27, and the like are appropriately modified and designed. It is.

  In the above embodiment, the plowing member 27 is disposed at the rear position in the traveling direction of the penetration beam 4 and the expansion member 18 as the vertical opening forming position D, and the vertical opening T is formed. The soil in the field at the mouth formation position D is scooped up by the scraping member 27 and discharged to the side to form the excavation groove U. First, the soil in the field is scooped up by the scraping member 27 and discharged to the side at the vertical opening formation position D where the vertical opening T is formed, and the excavation groove U is formed. After the catch groove U is formed, the expansion member 18 may be configured to form the vertical opening T.

  As described above, the intended purpose can be sufficiently achieved.

W Underground soil S Penetration groove H Underdrain M Ground surface T Longitudinal channel D Vertical channel formation position P Work position Q Retreat position F Pregroove a Field scene U Digging groove
U ₁ Inner side surface E Field scattered matter R Side groove 1 Traveling machine body 2 Connection mechanism 3 Machine frame 4 Penetration beam 5 Shaking mechanism 17 Bullet body 18 Expansion member 19 Expansion mechanism 27 Plow member 35 Pretreatment member 37 Side groove cut body 38 Side groove cutting body 41 Retraction mechanism 42 Pregroove cutting body 43 Rolling wheel body 44 Stabilizing member
44a contact plate surface
44b side contact plate surface

Claims (4)

The machine frame is connected to the traveling machine body by a connection mechanism, and the penetration beam is vertically installed in the machine frame so as to be freely swingable in the traveling direction by the shaking mechanism, and a culvert is formed in the field soil below the penetration beam. A possible bullet body is arranged, and the side surface of the penetration trace groove formed by extending in the vertical direction in the field soil is expanded by the penetration beam at a position behind the penetration direction of the penetration beam and opened to the ground surface. An expansion member that can form a vertical opening is provided, and an expansion mechanism that expands the expansion member is provided, and the scattered matter in the field such as scum scattered in the field is discharged to the side of the machine frame. A possible pretreatment member is provided at a front position in the traveling direction of the penetration beam, and the vertical mouth path forming position is obtained by scooping soil from the field to the rear position in the traveling direction of the expansion member of the machine frame and discharging it to the side. the photo provided capable of forming plow member a groove, posture changeable the plow member on the retracted position and the working position A retracting mechanism is provided, and a contact plate surface that can contact the farm scene and a side contact plate surface that can contact the inner side surface of the dug groove are provided at the rear position in the advancing direction of the plow member. A stabilizing member capable of suppressing lateral vibration of the plow member is provided, and a digging groove is formed by the plow member , and the vertical opening is formed in the digging groove. A culvert forming device. Underdrain forming apparatus according to claim 1, characterized by being provided Mizosetsu capable groove Setsutai the Gawajo groove in the field plane in the direction of travel position of the plow member. 3. A culvert forming apparatus according to claim 1 or 2 , wherein a pre-grooved body capable of grooving a pre-groove in the field scene is provided at a position forward of the penetration beam in the traveling direction. The undercarriage forming apparatus according to any one of claims 1 to 3 , wherein a rolling body capable of setting the undercarriage height of the undercarriage is provided on the machine frame so as to be adjustable in height.