JP4785547B2 - Sheet laying device - Google Patents

Description

  The present invention relates to a sheet laying device for laying a sheet on a groove and a groove shoulder formed on the ground.

  Conventionally, a tillage device is attached to a management work machine, and a vertical forming plate for raising a tillage soil to form a straw and a multi-device covering the formed straw with a sheet (used paper film) are connected to the tillage device. And the apparatus which forms cultivation beds, such as vegetables, is well-known (for example, refer patent document 1).

On the other hand, a concave groove with a depth of about 20 cm and a width of about 60 cm is formed in the field using a management work machine, and a root-permeable permeable sheet is laid in this groove, and then the tillage soil is backfilled on the sheet and the necessary fertilizer A rhizosphere-suppressing cultivation method for cultivating vegetables, tomatoes, melons, and the like by putting the potato into a surface is known (see, for example, Patent Document 2).
Japanese Patent Laid-Open No. 9-140213 JP-A-10-136787

  Conventionally, there is no device for smoothly laying a root-proof water-permeable sheet in a groove (concave groove) used in the rhizosphere-suppressing cultivation method, but the multi-device shown in Patent Document 1, for example, a vertical forming plate, By changing to a structure for laying the sheet along the concave groove shape, and changing the cover portion of the sheet along the groove shape It is conceivable to construct a sheet laying work machine exclusively for crop cultivation floors that lays a sheet in a ditch in the rhizosphere-suppressing cultivation method.

  However, the concave groove formed by bringing the tilling soil to both sides may cause problems such as the side walls of the groove sometimes collapsing when the sheet is laid. An object of the present invention is to provide a sheet laying apparatus that can smoothly perform a sheet laying operation while preventing collapse of the concave groove, particularly both side walls.

The sheet laying apparatus according to the present invention for solving the above-described problems includes a groove forming portion 31 that holds the tilled soil on both sides to form a side wall of the concave groove 5 and holds the soil, and a sheet 6 in the groove 5. A sheet laying work portion 32 for laying, and the sheet laying work portion 32 folds the side end portions of the sheet 6 laid along the groove 5 into the groove shoulder portions 5 a on both sides of the groove 5. In the sheet laying device provided with the burying guide 56, the burying guide 56 made of a freely rotatable disk is disposed on the side of the groove forming portion 31 within the range of the earth retaining action by the groove forming portion 31. One feature.

Secondly, it is provided with a groove forming part 31 that moves the soil to both sides to form a side wall of the concave groove 5 and holds the soil, and a sheet laying work part 32 that lays the sheet 6 in the groove 5, The sheet laying work section 32 is inserted into the groove shoulder 5a, and an embedded guide 56 for folding the side end of the sheet 6 laid along the groove 5 into the groove shoulder 5a on both sides of the groove 5 Then, in the sheet laying device provided with the covering body 59 for covering the upper portion of the folded portion of the sheet 6 into the groove shoulder portion 5a, the embedded guide 56 and the covering body 59 made of a freely rotatable disk are provided. Are arranged on the side of the groove forming portion 31 within the range of the earth retaining action by the groove forming portion 31.

  As described above, the embedded guide is disposed on the side of the groove forming portion within the range of the earth retaining action by the groove forming portion, so that the embedded guide is placed on the side of the sheet on the groove shoulder in the state of retaining the groove by the groove forming portion. Since the end portion is folded, there is an effect that when the sheet side end portion is folded, the groove, particularly the side wall of the groove is prevented from collapsing, and the sheet can be laid while preventing the groove from collapsing.

  Further, by placing the covering body on the side of the groove forming portion within the range of the retaining action by the groove forming portion, the covering body is inserted into the groove shoulder portion in a state of retaining the groove by the groove forming portion to cover the soil. Therefore, the crushing of the grooves, particularly the side walls of the grooves, is prevented during covering, and the sheet can be laid while preventing the crushing of the grooves.

  Further, by arranging the embedded guide and the covering body on the side of the groove forming portion within the range of the earth retaining action by the groove forming portion, the sheet side end portion by the embedded guide in the state of retaining the groove by the groove forming portion. The folding operation into the groove shoulder and the soil covering work with the covering body are performed, and the collapse of the groove, especially the side wall of the groove, is prevented during both operations, and the sheet can be laid while preventing the collapse of the groove.

  And, by constructing the embedded guide from a freely rotatable disc, the thickness of the guide (disc) is made smaller than the thickness of the wire compared to the case where the embedded guide is configured from a resilient wire. Can do. For this reason, the insertion width of the embedded guide into the groove shoulder can be kept small, the sheet can be smoothly inserted into the groove shoulder, and the sheet can be smoothly folded into the groove shoulder by free rotation.

  1 and 2 are a side view and a perspective view of a sheet laying work machine 1 using the sheet laying apparatus. This sheet laying work machine 1 has a configuration in which the sheet laying apparatus 4 is attached to a management work machine 3 to which a plowing device 2 for plowing a field is mounted.

  By making the management work machine 3 run in the field while operating the sheet laying device 4, the concave groove 5 in the rhizosphere-suppressing cultivation method is formed and shaped, and a root-proof permeable sheet 6 is laid in the groove 5, The seat 6 is fixed.

  The management work machine 3 includes a transmission case 7. The transmission case 7 is provided with a frame 8 protruding forward and backward. An engine 9 is mounted in front of the frame 8. A hitch 11 for connecting a work machine is provided behind the frame 8.

  The driving force of the engine 9 is input to the transmission case 7 via a transmission mechanism 14 including belt transmission means. A drive shaft 12 that protrudes to the left and right is provided below the transmission case 7. A crawler traveling device 13 is attached to each drive shaft 12.

  The left and right axles 12 are rotationally driven by the driving force input from the engine 9 to the transmission case 7. The crawler traveling device 13 is driven by driving the axle 12. The management work machine 3 travels by driving the crawler traveling device 13.

  A hook-like handle 16 is provided at the upper part of the transmission case 7. A grip 16 a is provided at the tip of the handle 16. A transmission lever 17 protrudes from the upper part of the transmission case 7. The rotation direction of the axle 12 is changed by the operation of the transmission lever 17 and the driving speed is changed.

  Therefore, the shift lever 17 can be used to change the traveling direction of the management work machine 3 and to shift the traveling speed. The handle 16 is attached so as to be able to rotate in the reverse direction so that the grip 16a protrudes forward or backward. The transmission lever 17 is attached so as to be able to be rotated in an inverted manner so that the tip protrudes forward or backward.

  1 and 2, the handle 16 is set so that the grip portion protrudes toward the front of the management work machine 3, and the transmission lever 17 is set so that the tip protrudes toward the front of the management work machine 3. Indicates the state. In this case, the worker can turn the management work machine 3 by the shift lever 17 while holding the handle 16 facing the rear of the management work machine 3 and moving backward.

  The crawler traveling device 9 has a structure in which an endless belt-like crawler 21 is wound between a large-diameter driving wheel 18 and a small-diameter driven wheel 19. Drive wheels 18 are mounted on the axle 12. A crawler frame 22 is pivotably supported on the axle 12.

  The crawler frame 22 protrudes toward the front of the management work machine 3. The driven wheel 19 is supported on the front portion of the crawler frame 22 so as to be freely rotatable. The crawler traveling device 13 is pivotally supported on the axle 12 with the axle 12 as a pivot point.

  The tilling device 2 includes a tilling body frame 23. The tiller body frame 23 is connected to the hitch 11 on the front side. A rotary transmission case 24 is fixed to the tiller body frame 23 at a midway position in the front and rear. A driving force is input to the rotary transmission case 24 from the upper part of the transmission case 7 via the transmission case 26.

  A rotary shaft 27 that protrudes to the left and right is provided below the rotary transmission case 24. A plurality of tilling claws 28 are integrally attached to the outer periphery of the rotary shaft 27 to form a rotary portion 29. A rotary cover 30 that covers the upper side and the side of the rotary unit 29 is attached to the tillage body frame 23 side.

  The rotary shaft 27 is rotationally driven by a driving force input to the rotary transmission case 24. The rotational drive of the rotary shaft 27 and the drive stop thereof are operated by the transmission lever 17. The rotary claw 28 is rotated by rotationally driving the rotary shaft 27, and the farm is cultivated.

  The tilling claw 28 includes a plurality of long groove portion tilling claws 28a and a plurality of short groove shoulder portion tilling claws 28b. The groove portion tilling claws 28a and the groove shoulder portion tilling claws 28b are arranged together on the inner side and the outer side. The groove plowing claw 28a cultivates the field to the width and depth of the groove 5 approximately for the groove 5 formed by the seat laying device 4 within the distance between the left and right crawler travel devices 13 by the rotation of the rotary shaft 27. To do.

  The groove shoulder plow 28b is disposed outside the groove plow 28a and is shorter than the groove plow 28a. The groove shoulder portion 5a is cultivated shallowly. The groove shoulder plow 28b re-plows the shoulder pile tilled soil that is scattered and accumulated on the groove shoulder 5a by the groove plow 28a together with the groove shoulder 5a. As a result, the surface layer of the groove shoulder 5a is cultivated uniformly and leveled to a certain height.

  The sheet laying device 4 is formed while forming the groove 5 (concave groove in the rhizosphere-restricted cultivation method) with the tilled soil cultivated by the tilling device 2 and retaining the side wall of the formed groove 5. A groove forming part 31 for leveling and forming the cultivated soil of the groove shoulder part 5a on both sides of the groove 5 and a sheet laying work part 32 for laying the root-proof water-permeable sheet 6 in the groove 5 formed by the groove forming part 31. It consists of.

  The groove forming unit 31 and the sheet laying work unit 32 are connected to the tilling device 2, and the sheet laying device 4 is attached to the management work machine 3. For this reason, attachment parts 33 and 34 for attaching the groove forming part 31 and the sheet laying work part 32 are provided on the front and rear sides of the plowing main body frame 23. The attachment portions 33 and 34 are each composed of an attachment hole and a fixture.

  The groove forming portion 31 described above includes a culture plate 36 and a shoulder forming plate 37. The cultivating plate 36 forms the grooves 5 and holds the side walls of the formed grooves 5. The shoulder forming plate 37 equalizes and forms the cultivated soil of the groove shoulder 5a.

  The soil cultivating plate 36 has a front plate 38 having a width equal to the plowing width (the width of the groove 5 to be formed) by the groove plowing claws 28a, and is continuously connected to the left and right sides of the front plate 38 and extends rearward. And a side plate 39 to be taken out. The front plate 38 and the side plate 39 have an inverted U shape in plan view.

  The shoulder forming plate 37 is made of a plate material in the left-right direction that forms the cultivated soil of the groove shoulder 5a. The shoulder portion forming plate 37 is provided so as to protrude from the side plate 39 of the culturing plate 36 to the left and right. The shoulder forming plate 37 is disposed above the bottom edge of the soil culturing plate 36 so as to correspond to the groove shoulder 5a.

  The groove forming portion 31 is attached to the tiller main body frame 23 by inserting and fixing an attachment rod 41 erected from the culture plate 36 side to the attachment portion 33. The groove forming part 31 is disposed behind the tillage device 2.

  A mounting bar 42 in the left-right direction is mounted and supported on the mounting rod 41. Support frames 43 are mounted on the mounting bar 42 so that the mounting width can be adjusted. A support frame 44 is inserted and supported by the mounting portion 34 from above. Both support frames 43 and 44 protrude rearward.

  The support frame 43 is provided with a rotating shaft support 46 in the middle part in the front-rear direction. As shown by an arrow A in FIG. 1, the support frame 43 can be set in a retracted posture by reversing a rear portion forward from the rotation shaft support portion 46.

  A support rod 48 having a gate shape in plan view is attached via a bracket 47 on the front side of the support frame 43 from the rotation shaft support portion 46. On both sides of the support rod 48, a pair of left and right sheet support portions 51 for supporting a root-proof water-permeable sheet (root-proof water-permeable sheet roll 49) wound in a roll shape is provided.

  The sheet support part 51 supports both side core parts of the root-proof permeable sheet roll 49. The root support water permeable sheet roll 49 is mounted on the upper position of the cultivating plate 36 of the sheet laying device 4 by the sheet support portion 51. The root-proof permeable sheet roll 49 is disposed at a substantially central position in the front-rear direction of the side plate 39 in the culture plate 36. The root-proof water-permeable sheet roll 49 rotates to feed out the root-proof water-permeable sheet 6.

  Both ends of a substantially U-shaped support rod 52 are pivotally attached to both sides of the support rod 48. A feeding roller 53 is rotatably supported on the support rod 52. The feeding and rolling roller 53 is disposed above the soil culturing plate 36 by the support bar 52 and below the sheet support portion 51. As shown in FIG. 3, the feeding and rolling roller 53 rolls the left and right sides of the fed root-proof permeable sheet 6 to the groove shoulder 5 a.

  Brackets 54 are respectively attached to the rear portions of the left and right support frames 43 from the rotation shaft support portions 46. An embedded guide 56 for the root-proof permeable sheet 6 is attached to each bracket 54. The embedded guide 56 is a pair of left and right. The embedded guide 56 is formed of a thin disk provided at the lower end of a mounting rod 57 attached to the bracket 54 so as to freely rotate.

  The left and right buried guides 56 partially overlap the side plate 39 of the culture plate 36 in a side view, and are disposed on the outside of the side plate 39 above the corresponding left or right groove shoulder 5a. As shown in FIG. 3, the embedded guide 56 has a side end portion of the root-proof water-permeable sheet 6 in a state of being supported by the rolling roller roller 53 behind the feeding roller roller 53 and the groove shoulder portion 5 a. The side end of the root-proof permeable sheet 6 is pushed into the piled tillage soil of the groove shoulder 5a and inserted.

  For this reason, the embedment guide 56 is disposed on the rear side of the feeding roller roller 53 so that the operating position on the root-proof permeable sheet 6 is behind the feeding roller roller 53. Thereby, the side edge part of the root-proof permeable sheet 6 is bent, and is folded in the ground in the groove shoulder part 5a.

  A bracket 58, which is different from the bracket 54, is attached to the rear portion of the both support frames 43 from the pivot shaft support portion 46 behind the bracket 54 for attaching the embedded guide 56. The bracket 58 is provided with a cover ring 59 that covers the soil by scraping soil from the outside above the folded portion of the root-proof permeable sheet 6 into the groove shoulder 5a.

  The earth covering ring 59 is formed of a disk that is pivotally supported by a mounting rod 61 supported on the bracket 58 side so as to freely rotate. The peripheral surface of the earth covering ring 59 has a gear-like uneven shape. A part of the earth covering ring 59 is inserted into the groove shoulder 5a, and freely rotates to scrape the earth of the groove shoulder 5a to cover the earth.

  For this reason, the cover ring 59 partially overlaps the side plate 39 of the cultivating plate 36 in a side view, and the action position with respect to the groove shoulder 5a is located behind the action position of the embedded guide 56 outside the side plate 39. Thus, it is arranged on the rear side of the embedded guide 56. However, since the cover ring 59 only needs to cover the folded portion of the root-proof permeable sheet 6 folded by the embedded guide 56 as described above, the cover ring 59 and the embedded guide 56 partially overlap in side view. You may arrange | position to the back side of the embedding guide 56 by arrangement | positioning and the arrangement | positioning in which the action position of the earth covering ring 59 overlaps with the back side of the action position of the embedding guide 56 partially.

  A bifurcated mounting rod 62 is attached to the rear end of the support frame 44 described above. A pair of left and right laying wheels 63 are pivotally supported on the mounting rod 62 so as to be freely rotatable. The laying ring 63 is disposed at a front-rear position between the burying guide 56 and the soil covering ring 59. The laying ring 63 at least partially overlaps with the burial guide 56 and the covering earth ring 59 in a side view between both side plates 39 of the cultivating board 36. The laying wheel 56 presses the root-proof water-permeable sheet 6 that is rolled out to the groove shoulder portion 5 a by the feeding roller roller 53 on both the left and right sides, against both corners (groove corners) of the groove 5 in the groove 5. Position.

  The sheet laying work section 32 includes the sheet support section 51, the feeding roller 52, the burying guide 56, the covering ring 59, and the laying ring 63 that are mounted on the tiller main body frame 23 as described above. .

  The sheet support portion 51, the feeding roller 53, the burying guide 56, the covering ring 59, and the laying ring 63 are disposed in a range from the approximate center in the front-rear direction of the left and right side plates 39 to the rear end of the culturing plate 36. . The rear end of the laying wheel 63 at the last position among the sheet support portion 51, the feeding and rolling roller 53, the burying guide 56, the covering ring 59, and the laying wheel 63 is positioned forward by a predetermined distance L from the last end of the side plate 39. is doing. Note that the embedded guide 56 and the cover ring 59 are switched to the retracted posture projecting upward and forward by folding the support frame 43 into the retracted posture.

  The management work machine 3 to which the sheet laying device 4 is attached as described above is driven in the direction of F shown in FIG. Move forward.

  As a result, first, the rotation of the rotary part 29 causes the groove part tilling claw 28a to continuously plow the field to the width and depth of the groove 5 formed by the sheet laying device 4 along the traveling locus of the management work machine 3. . At the same time, the groove shoulder cultivating claws 28b continuously shallowly cultivate the groove shoulders 5a on both sides of the groove cultivating portion.

  Then, along with the traveling of the management work machine 3, the cultivated soil is brought into contact with the cultivating plate 36 of the groove forming portion 31 in the left-right direction to form a continuous groove 8. At this time, the side plate 39 is in continuous contact with the side wall of the groove 5 to be formed, presses and leveles the side wall, forms the side wall, and holds the side wall. The front plate 38 forms the bottom surface of the groove 5. Then, the shoulder forming plate 37 continuously pushes and forms the groove shoulder portions 5a on both the left and right sides of the groove 5.

  The root-proof permeable sheet 6 is continuously fed out to the field via the feeding roller 53 as the management work machine 3 travels. The extended root-proof permeable sheet 6 is positioned at the corner portion of the shaped groove 5 by rolling contact with the laying ring 63, and the side end portion is continuously folded and inserted into the groove shoulder portion 5 a by the embedded guide 56. The

  The soil covering ring 59 covers the soil above the portion of the root-proof water-permeable sheet 6 that is folded into the groove shoulder 5a. The folding ends of both side end portions of the root-proof permeable sheet 6 are closed and fixed by applying weight by continuous covering. As described above, groove formation, shaping of the groove, laying of the root-proof permeable sheet 6 and fixing of the root-proof permeable sheet 6 can be performed in one step.

  The burial guide 56 and the cover ring 59 are arranged on the outer side of the side plate 39 of the cultivating plate 36 as described above. For this reason, the embedded guide 56 has a root-proof permeable sheet 7 in the groove shoulder portion 5a on the side where the side plate 39 of the cultivating plate 36 is in contact with the side wall so as to level the side wall of the groove 5. It is inserted with the side edge part.

  Since the insertion of the buried guide 56 into the groove shoulder 5a is performed in a state where the side plate 39 of the cultivating plate 36 is earthed on the side wall of the groove 5 as described above, the root-proof permeation by the buried guide 56 is performed. The folding operation of the end portion of the sheet 6 into the groove shoulder 5a is stably performed in a state in which collapse of the side wall of the groove 5 is prevented.

  The cover ring 59 is inserted into the cultivated groove shoulder 5a after the side guide of the root-proof water-permeable sheet 6 is folded into the groove shoulder 5a by the embedded guide 56, and the soil covering work is performed. At this time, since the cover ring 59 is inserted into the groove shoulder 5a in a state where the side wall 39 of the cultivating plate 36 is pressed against the side wall of the groove 5 as described above, the cover ring 59 is used. The soil covering operation is stably performed in a state where the collapse of the groove 5, particularly the side wall, is prevented.

  In the case of the present embodiment, the rear end position of the side plate 39 on the outer side of the side plate 39 in which both the buried guide 56 and the covering ring 59 are within the range of the earth retaining action by the side plate 39 of the cultivating plate 36. Since it is arranged further forward so that a part thereof overlaps with the side plate 39 in a side view, the side end of the root-proof permeable sheet 6 by the embedded guide 56 in a state in which the collapse of the side wall of the groove 5 is prevented. Both the folding operation into the groove shoulder 5a and the soil covering operation by the soil covering ring 59 are performed stably.

  In the case of the present embodiment, both the burial guide 56 and the covering ring 59 are disposed forward of the rear end position of the side plate 39 on the outer side of the side plate 39 of the cultivating plate 36, and thus embedded as described above. Both the folding operation into the groove shoulder 5a of the side end portion of the root-proof permeable sheet 6 by the guide 56 and the covering operation by the covering ring 59 are performed stably in a state where the collapse of the side wall of the groove 5 is prevented. Is called.

  However, in some cases, only one of the embedded guide 56 or the cover ring 59 is disposed in front of the rear end position of the side plate 39 of the cultivating plate 36, and the folding work or the covering operation of the root-proof permeable sheet 6 is performed on the side plate of the cultivating plate 36. It can also be executed in a state where the earth retaining action by 39 is effective.

  The buried guide 56 and the cover ring 59 are folded into the groove shoulder 8a at the side end portion of the root-proof permeable sheet 6 within the range of the retaining action of the side wall of the groove 5 by the side plate 39 of the cultivating plate 36. By performing the soil covering operation, the above operation can be performed in a state in which the collapse of the side wall of the groove 5 is prevented.

  Therefore, it is not always necessary to place the burial guide 56 and the cover ring 59 in front of the rear end of the side plate 39 of the cultivating plate 36 as described above. The guide 56 and the cover ring 59 can be protruded rearward from the rear end of the side plate 39 of the cultivating plate 36. In the present embodiment, the burial guide 56 and the earth covering ring 59 overlap with the side plate 39 while partially protruding above the side plate 39 in a side view. As long as it is within the fastening action range, it can be arranged at any vertical position with respect to the side plate 39.

  The buried guide 56 and the cover ring 59 may be provided in the rear end range of the side plate 39 including the range that can be protruded rearward from the rear end of the side plate 39 of the culture plate 36. As described above, since the sheet laying device 4 is attached to the rear of the management work machine 3 that travels forward, the rear side is the rear side in the direction in which the grooving plate 36 forms the grooves.

  An embedded guide 64 having a shape in which an elastic wire is smoothly curved rearward as shown in FIG. 4 can be used for the sheet laying device 4. The embedment guide 64 has a free end positioned above the groove shoulder 5a, and slides both side ends of the root-proof water-permeable sheet 6 laid on the groove shoulder 5a by the feeding roller 53 to the lower side. It is in a state where it is guided and pushed into the piled tillage soil at the shoulder and bent.

  The embedding guide 64 is provided in a range in front of the rear end of the side plate 39 of the culture plate 36. However, the side plate 39 may protrude rearward from the rear end of the side plate 39 within the range of the earth retaining action of the side wall of the groove 5.

  Also in this case, the embedded guide 64 performs the folding operation into the groove shoulder 85 at the side end portion of the root-proof permeable sheet 6 in a state where the side plate 39 of the culture plate 36 presses the side wall of the groove 5 and holds the earth. Do. Therefore, as in the case of the disk-shaped embedded guide 56, the folding operation into the groove shoulder 5a at the side end of the root-proof permeable sheet 6 is performed in a state in which the collapse of the groove 5 is prevented. It can be performed stably.

  By configuring the embedded guide 64 with a wire having elasticity, the structure of the embedded guide can be simplified. However, as shown in FIGS. 1 to 3, by configuring the embedded guide 56 from a thin disk, the thickness of the embedded guide 56 (disk) is set to the thickness of the embedded guide 64 made of the wire (the thickness of the wire). S) can be made smaller (thinner).

  By configuring the embedded guide 56 from a thin disc as described above, the width of insertion of the embedded guide into the groove shoulder 5a can be reduced. Thereby, the root-proof water-permeable sheet 6 can be smoothly inserted into the groove shoulder 5a, and the root-proof water-permeable sheet 6 can be smoothly folded into the groove shoulder 5a by free rotation.

  In addition, in this embodiment, although the said both sheet | seat laying apparatus demonstrated also the case where the root-proof permeable sheet 6 used in a rhizosphere suppression cultivation method was laid with respect to the concave groove | channel 5, the root-proof permeable sheet 6 was demonstrated. In addition, any sheet can be used when the sheet is laid in a concave groove.

It is a side view of a sheet laying work machine using this sheet laying device. It is a perspective view of a sheet laying work machine using this sheet laying device. It is a perspective view which shows the sheet | seat laying operation | work by the sheet | seat laying work machine using this sheet | seat laying apparatus. It is a perspective view of the sheet | seat laying work machine using the sheet | seat laying apparatus which comprised the burying guide with the wire.

5 Groove 5a Groove shoulder 6 Root-proof water-permeable sheet (sheet)
31 Groove forming part 32 Sheet laying work part 56 Embedding guide 59 Covering ring (covering body)

Claims (2)

A groove forming part (31) for forming the side wall of the concave groove (5) by bringing the tilled soil to both sides and retaining the earth, and a sheet laying work part for laying the sheet (6) in the groove (5) ( 32), and the sheet laying working part (32) is connected to the side end of the sheet (6) laid along the groove (5), and the groove shoulders (5a) on both sides of the groove (5). In the sheet laying apparatus provided with the embedment guide (56) which is folded and folded, the embedment guide (56) made of a freely rotatable disk is formed into a groove within the range of the earth retaining action by the groove forming part (31). A sheet laying device disposed on the side of the section (31). A groove forming part (31) for forming the side wall of the concave groove (5) by bringing the tilled soil to both sides and retaining the earth, and a sheet laying work part for laying the sheet (6) in the groove (5) ( 32), and the sheet laying working part (32) is connected to the side end of the sheet (6) laid along the groove (5), and the groove shoulders (5a) on both sides of the groove (5). An embedding guide (56) which is bent and folded inside, and a covering body (59) which is inserted into the groove shoulder (5a) and covers the upper part of the folded portion into the groove shoulder (5a) of the sheet (6). In the sheet laying apparatus provided with the groove forming portion, the embedded guide (56) and the covering body (59) made of a freely rotatable disk are both within the range of the earth retaining action by the groove forming portion (31). A sheet laying device disposed on the side of (31).

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