JP5751765B2 - Sheet laying device - Google Patents

Description

  The present invention relates to a sheet laying device that covers agricultural sheets on a fence as it travels in the direction of the fence.

  For the purpose of heat retention, water retention, insect repellent and the like, it is known as one effective cultivation method for crops to coat the ridge with an agricultural sheet. Conventionally, the work of laying the agricultural sheet on the fence has been performed manually, but this has the problem that it is difficult to produce good quality crops at low cost due to increased labor.

  On the other hand, a pair of groove-shaped means that respectively form locking grooves along the hem side of the heel are provided on the left and right outermost ends of the ridge to be covered, and the agricultural sheet fed to the farm scene side is engaged. The sheet laying shown in Patent Document 1 is provided with pushing means for sequentially pushing in and stopping in the retaining grooves respectively on the rear side of the pair of groove forming means, and covering the straw with the agricultural sheet as it travels in the saddle direction. Devices are known.

JP 2007-289093 A (page 6, FIG. 8) Japanese Patent Laying-Open No. 2008-187777 (page 3-5)

  In the sheet laying device of the above document, since the end side of the agricultural sheet is locked in the locking groove, the ridge can be stably covered with the agricultural sheet, while the end of the agricultural sheet is locked in the locking groove. Since the edge is completely buried in the soil after being pushed into the soil, it may take time to remove the agricultural sheet from the straw at a predetermined stage of growth, which reduces the production cost of the crop. It may be difficult to keep it low.

  It is an object of the present invention to provide a sheet laying device that makes it possible to perform a stable coating operation on an awning of an agricultural sheet without trouble and reduces the trouble of removing the agricultural sheet from the ridge. And

In order to solve the above problems, the present invention firstly includes a pair of groove forming means 26 that respectively form locking grooves D along the hem side of the flange U on the left and right outermost ends of the flange U to be covered. The pushing means 28 for sequentially pushing and locking the agricultural sheet 16 fed to the farm scene side into the locking groove D is provided on the rear side of the pair of groove forming means 26, respectively, for traveling in the U direction. Accordingly, it is a sheet laying apparatus for covering the ridge U with the agricultural sheet 16, and is fed so that the end of the agricultural sheet 16 is exposed from the locking groove D by being folded back in the locking groove D. Each pushing means 28 is arranged at a position where the left and right inner parts of the sheet 16 are pushed into the locking groove D, and the front end side of the side cover 53 arranged on the side of the flange U is the true of the groove forming means 26. The side cover 53 is disposed so as to be disposed on the rear side, and the side cover 5 It is characterized in that the formation of the insertion portion 54a is inserted into the locking groove D in the front end side of the.

Second, the bottom side forming portion 59 for expanding the left and right widths of the bottom side of the locking groove D is provided at the lower end portion of the insertion portion 54a .

Thirdly, the guide portion 58 for guiding the fed agricultural sheet 16 to the left and right direction pushing means 28 is disposed on the front side of the pushing means 28 .

Fourth, a pressing wheel 68 that is inclined inwardly in the left and right direction in the rear view so as to press the agricultural sheet 16 toward the heel U side is arranged on the rear side of the pressing means 28 .

Fifthly, a left-right guide roller 29 is supported on the front obliquely upper side of the side-view pushing means 28 so as to be rotatable about its axis so that the entire length of the guide roller 29 is shorter than the left-right width of the agricultural sheet 16. The rod-shaped contact bodies 83 that are elastically contacted with the agricultural sheet 16 that is formed in the guide and that is guided obliquely downward and rearward as the guide roller 29 rotates are provided on the left and right ends of the guide roller 29, respectively. It is characterized by that.

Sixth, the left and right sheet rolls 18 around which the agricultural sheet 16 is wound are supported rotatably around the axis so that the agricultural sheet 16 is fed out, and the left and right positions of the sheet roll 18 are changed and adjusted. The parallel link mechanism 27 is provided .

  According to the present invention, the agricultural sheet that is stably covered with the hook while being locked in the locking groove along the hem side of the bag is folded back in the locking groove, and the left and right ends thereof are locked. Since it is exposed from the groove, it is possible to easily remove the agricultural sheet from the ridge by pulling up the left and right ends.

  Moreover, if the guide part which guides the extended agricultural sheet to the left-right direction pushing means side is arranged on the front side of the pushing means, the agricultural sheet can be more stably locked in the locking groove in the predetermined posture. It becomes possible.

  In addition, the side cover is arranged so that the front end side of the side cover arranged on the side of the collar is located immediately behind the groove forming means, and the insertion is inserted into the locking groove on the front end side of the side cover. If the portion is formed, the locking groove can be formed more stably by the insertion portion. In addition, since the insertion portion is provided in the side cover, it is not necessary to prepare a separate member for providing the insertion portion.

  Furthermore, if a bottom side forming portion that enlarges the left and right width of the bottom side of the locking groove is provided at the lower end of the insertion portion, the agricultural sheet can be more efficiently pushed into the locking groove in the predetermined posture. Can be included.

  In addition, if the pressing wheel inclined to the left and right inside toward the lower side of the rear view so as to press the agricultural sheet toward the heel side, the agricultural sheet is covered more stably on the heel side. Can do.

  Further, a guide roller in the left-right direction is supported on the front obliquely upper side of the side-view pushing means so as to be rotatable about its axis, and the guide roller is formed so that the total length is shorter than the left-right width of the agricultural sheet. If a bar-like contact body that elastically abuts on the agricultural sheet guided obliquely downward and rearward with the rotation operation of the guide roller is provided on each of the left and right ends of the guide roller, the agricultural sheet when being fed out It is possible to prevent the slack of the water efficiently.

  Also provided is a parallel link mechanism that supports a horizontal roll of paper around which the agricultural sheet is wound so that the agricultural sheet is fed out so that the agricultural roll can be rotated, and the horizontal position of the roll is changed and adjusted. Then, since the feeding state of the agricultural sheet can be easily changed according to the work environment, versatility is improved.

1 is an overall side view of a tractor to which the present invention is applied. It is a side view of a sheet laying device. It is a top view of a sheet laying device. It is a rear view of a sheet laying device. (A) is a rear view which shows the formation state of the latching groove | channel by a groove formation disc, (B) is a rear view which shows the mode of the film | membrane work of the agricultural sheet | seat by a pushing disc and a press ring, (C ) Is a rear view showing a state of the agricultural sheet whose end side is locked in the locking groove. (A) is a principal part top view which shows the structure of a support mechanism, (B) is a principal part front view which shows the structure of a control mechanism. It is a principal part plane sectional view which shows the structure of a roll axis | shaft. (A) is a side view when the sheet laying device is not used, and (B) is a rear view when the agricultural sheet 16 is laid on the flatbed U.

  FIG. 1 is an overall side view of a tractor to which the present invention is applied. A tractor, which is a kind of work vehicle, is linked to a rear portion of a traveling machine body 3 having a pair of left and right front wheels 1 and 1 and rear wheels 2 and 2. It is configured by connecting a sheet laying device 6 which is a kind of work machine via a mechanism 4, and the vehicle body is caused to travel forward in the direction in which a plurality of baskets U are juxtaposed on the field. The seat laying work is performed as the vehicle travels forward.

  The traveling machine body 3 is provided with an openable / closable bonnet 8 that covers an engine (not shown) on the front half of the front and rear chassis 7 supported by the four wheels 1 and 2, and is steered behind the hood 8 on the chassis 7. It is configured by installing the part 9. The steering unit 9 includes a seat 11, a steering handle 12 disposed in front of the seat 11, a switching lever 13 supported to be able to swing back and forth on the side of the steering handle 12, and front and rear on the side of the seat 11. And a shift lever 14 supported so as to be swingable.

  An operator seated on the seat 11 performs forward / reverse switching of the vehicle body by a forward / backward swing operation of the forward / reverse switching lever 13, and a travel shift operation by a forward / backward swing operation of the speed change lever 14, and steering by the steering handle 12. Perform the operation.

Next, the configuration of the sheet laying device 6 will be described in detail.
2 to 4 are a side view, a plan view, and a rear view of the sheet laying apparatus. In this tractor, the right and left front wheels 1, 1 and the left and right front wheels 1, 1 and 2 are formed in a trough T that is formed in a concave shape between the adjacent ridges U so that the traveling body 3 straddles a plurality of (two in the illustrated example) ridges U. With the left and right rear wheels 2 and 2 positioned, the vehicle body travels forward, and along with the forward travel, the agricultural sheet 16 is fed out from the sheet laying device 6 extending in the width direction of the traveling machine body 3, and is fed out. Agricultural sheet 16 is coated on ridge U.

  The seat laying device 6 has a lateral width longer than the width of the vehicle body 3, and a central portion (central portion) in the left-right direction is located at a central left and right portion (central portion) of the traveling vehicle body 3 in a rear view. Therefore, the left side portion and the right side portion of the sheet laying device 6 protrude laterally from the traveling machine body 3 in the rear view. As a result, the sheet laying device 6 can cover the agricultural sheet 16 at a stretch on the number of ridges U (four in the illustrated example) greater than the number of ridges U that the traveling machine body 3 straddles.

  Incidentally, each of the ridges U shown in the figure is a high ridge that is curved in a mountain shape when viewed from the back cross section. . In addition, the agricultural sheet 16 is a non-woven fabric that is highly deformable and has high heat retention and defrosting effects. The agricultural sheet 16 is wound around the outer periphery of a cylindrical core material 17 (see FIG. 7) extending in the left-right direction. Thus, a sheet roll 18 having a columnar shape in the lateral direction is configured.

  In order to perform the covering operation of the agricultural sheet 16 on the eaves U as the vehicle body moves forward, the sheet laying device 6 includes a horizontal main frame 19 formed over the entire lateral width direction, A plurality of connecting pins 21 and 22 that are installed on the center (center) side in the left-right direction and connected to the link mechanism 4 and vertically support columns 23 that extend downward from the main frame 19 side are rotatable. The left and right outer hem part u2 side (the hem side) of the supported grounding ring 24 in a side view in a side view and the outermost hook U (outermost hook U) positioned on the outermost side in the left-right direction among the plurality of hooks U to be covered. A disk-shaped groove forming disk (groove forming means) 26 for forming a locking groove D on the sheet, the above-described sheet roll 18 rotatably supported around its own axis via a support mechanism 27, and the sheet roll 18 The agricultural sheet 16 from the above-mentioned locking groove D A disc-shaped pushing disk (pushing means) 28 that is pushed into and locked on, a left and right guide roller 29 that guides the agricultural sheet 16 from the sheet roll 18 to the pushing disk 28 side, and a spare sheet roll 18 are mounted. And a pair of left and right roll stays 31 to be supported.

  The main frame 19 has a rectangular columnar shape (more specifically, a quadrangular columnar shape) made of metal that extends in the left-right direction, and a horizontal direction extending from the left and right ends of the horizontal frame 32 to the left and right sides. An extension frame 33 is included. Each of the left and right extension frames 33 is a metal member formed in a left and right prism shape having substantially the same cross-sectional shape as the horizontal frame 32, and the left and right inner halves overlap the horizontal frame 32 in plan view. In this manner, they are brought into contact with the upper surface side of the horizontal frame 32, and both of them are fixedly fixed by a fixing tool 34.

  The plurality of connecting pins 21 and 22 will be described. A lower side bracket 36 extending obliquely downward and forward is projected at a symmetrical position of the main frame 19. A pair of left and right top side brackets 37 extending obliquely upward are integrally projected, and in a plan view, the pair of top side brackets 37 disposed between the left and right lower side brackets 36, 36 in the left-right direction. The left and right inner end portions of the left and right lower side connecting pins 22 are cantilevered and supported by the left and right lower brackets 36. .

  On the other hand, the link mechanism 4 includes a pair of left and right lower links 38 and 38 in the front-rear direction, and a front-rear direction top link 39 disposed between the lower links 38 and 38 in the plan view and located on the upper side of the lower link 38. It is composed of The lower link 38 and the top link 39 are attached to and supported by the traveling machine body 3 such that the front link is swingable up and down, and the left and right lower links 38 are respectively connected to the left and right lift arms 41 supported on the traveling machine body 3 side. The lift arm 41 is supported by being suspended through 42 and is driven to swing up and down by expansion and contraction of a hydraulic cylinder (not shown), so that the vertically swinging positions of the lower link 38 and the top link 39 are adjusted.

  The left and right lower side connecting pins 22 corresponding to the rear end portions of the left and right lower links 38 are inserted so as to be rotatable about the axis, and the top side connecting pins 21 are provided at the rear end portions of the top links 39. The seat laying device 6 is connected to the traveling machine body 3 such that the vertical height can be adjusted by inserting it so as to be rotatable about the axis. Incidentally, when the height of the seat laying device 6 is adjusted, the distance between the front end portion of the top link 39 and the top side connecting pin 21 is changed along with the vertical swing adjustment of the left and right lower links 38. By adjusting the expansion and contraction in the axial direction, it is possible to cope with this change in distance.

  The grounding wheel 24 is supported in an idle state immediately behind the left and right rear wheels 2, and the left and right grounding wheels 4 are arranged so as to wrap with the front and rear wheels 1 and 2 when viewed from the back. In other words, the front and rear wheels 1 and 2 and the grounding wheel 24 are grounded to the same valley T. The support structure of the grounding ring 24 will be described. The above-mentioned support pillar 23 is provided for each grounding ring 24, and the upper end portion side of each support post 23 can be moved and adjusted in the axial direction via the grounding side fixture 43. Mounted and fixed to the frame 19, a grounding side bracket 44 is integrally extended rearward from the lower end portion of each column 23, and the grounding ring 24 is rotatably supported at the rear end portion of each grounding side bracket 44. Has been. The left and right grounding wheels 24 are grounded to the valleys T of the farm field, thereby supporting the main frame 19 to which the substantially entire load of the seat laying device 6 is applied in a balanced manner.

  The groove forming disks 26 are respectively arranged on the left and right outer hem sides of the pair of left and right outermost ribs U in a plan view, and each of the left and right groove forming disks 26 has a plate-like member in an inverted U shape in a rear view. At the lower end of the forming side bracket 46 formed by bending, it is supported in a loose state by a forming shaft 47 in the left-right direction. When the above-described grounding ring 24 is grounded to the valley T of the field, a predetermined amount of the lower end side of the groove forming disk 26 is inserted into the soil of the field in a side view, and the groove forming disk 26 in this state is used for forward traveling of the vehicle body. By engaging with the rotation, the locking groove D is recessed along the ridge U on the skirt side (the valley T or the vicinity of the valley T) of the outermost ridge U.

  Further, the peripheral edge portion 26a of the groove forming disk 26 is formed in a wedge shape with a thickness gradually decreasing toward the outer side in the radial direction and sharply sharpened, and the engaging groove D is smoothly formed by the peripheral edge portion 26a. It is configured to be In addition, the forming-side bracket 46 is provided with a plate-shaped scraper 48 serving as a scraping body close to the outermost flange U side (inner side) side surface of the groove forming disk 26. The scraper 48 is configured to scrape mud and the like adhering to the side surface of the groove forming disk 26 as the groove forming disk 26 rotates.

  The support structure of each groove forming disk 26 will be described. The upper end side of the vertical support rod 49 integrally protruding upward from the upper end of the formation side bracket 46 is extended from the middle portion of the extension frame 33 on the near side of the main frame 19. The groove forming disk 26 is supported on the main claim 19 side by being attached and fixed to the forming side fixture 51 extending rearward so as to be movable and adjustable in the axial direction. By adjusting the movement of the support rod 49 in the axial direction, the ground height of the groove forming disk 26 is changed, and the depth of the locking groove D is adjusted. Incidentally, the forming-side fixing tool 51 also functions as a fixing tool that fixes the horizontal frame 32 and the extension frame 33 by sandwiching them from the front and rear.

  In addition, a cover bracket 52 extending rearward is integrally attached and fixed to a middle portion of each of the left and right support rods 49, and the left and right cover brackets 52 are sides that cover the outer side of the outermost rod U. Each of the covers 53 is fixed with a bolt. Each of the left and right side covers 53 includes a support cover 54 inclined obliquely downward and rearward so as to avoid the groove forming disk 26 from the cover bracket 52, and a sub-cover 56 attached and fixed to the outer side surface of the middle part of the support cover 54. The main cover 57 is attached and fixed to the inner side surface of the support cover 54.

  The main cover 57 is a cover body in the front-rear direction extended from the support cover 54 upward and rearward in a side view, and the entire upper end portion is bent and formed inward in the left and right directions along the outer side surface of the outermost flange U. . On the other hand, the rear side of the support cover 54 and the sub cover 56 are formed such that the upper part is bent to the left and right outside with respect to the lower part. Therefore, the support cover 54, the sub cover 56, and the main cover 57 form a wedge-shaped guide portion 58 as viewed from the back, and the guide portion 58 is located directly behind the groove forming disk 26 described above. As described above, the left and right guide portions 58 are arranged so that the left and right end sides of the agricultural sheet 16 fed rearward as the vehicle body moves forward are dropped to the bottom side of the wedge, respectively. And it is comprised so that it may guide to the locking groove D side.

  Further, the front end portion of the support cover 54 of the side cover 53 is disposed by arranging the entire front and rear direction of the lower end portion of the side cover 53 directly behind the groove forming disk 26 so that the side cover 53 is inserted into the locking groove D. In addition, an insertion portion 54a to be inserted into the locking groove D is formed. The vertical position of the lower end portion of the insertion portion 54a is substantially coincident with the vertical position of the lower end portion of the groove forming disk 26, and is positioned on the bottom side of the locking groove D when inserted into the locking groove D. Thus, a bottom side forming portion 59 is provided at the lower end portion of the insertion portion 54a. The insertion portion 54a is formed to be substantially the same as or slightly wider than the lateral width of the groove forming disk 26, and the bottom side forming portion 59 is formed to be wider than this, so that the rotation operation of the groove forming disk 26 is performed. The left and right width (especially the left and right width on the bottom side) of the locking groove D formed by the above is enlarged by the insertion portion 54a and the bottom side forming portion 59.

  The pushing disk 28 is disposed further rearward than the guide part 26 on the rear side of the right and left groove forming disks 26, 26. The support structure of the pushing disk 28 will be described. The front-rear locking side arm 62 supported so as to swing up and down around the left and right swinging shafts 61 disposed on the left and right extension frames 33. The upper and lower locking side rods 63 are fixedly attached to the rear end of each locking side arm 62, and the left and right outer side ends are fixedly attached to the lower end of each locking side rod 63 and the horizontal direction A locking-side stay 64 extending in the front-rear direction, a front-rear direction pushing-side support bar 66 supported at the left and right inner ends of each locking-side stay 64, and an upper end portion at the rear end of each pushing-side support bar 66. Are provided in the sheet laying device 6, and the left and right pushing discs 28 are supported in the idle state on the lower ends of the corresponding left and right pushing side rods 67, respectively. .

  When the grounding ring 24 is grounded to the valley T of the field, if the locking side arm 62 is swung to the lowest position, the lower end side of the pushing disk 28 is inserted into the locking groove D. The height of the pushing disk 28 is set. Incidentally, the insertion depth of the pushing disk 28 into the locking groove D at this time is slightly shallower than the depth of the locking groove D. The locking side arm 62 is elastically biased downwardly by an elastic member 65 such as a tension spring interposed between each locking side arm 62 and the main frame 19, so that no load is applied. In this case, it is held at the lowest position.

  For this reason, when the vehicle body travels forward, the end side of the agricultural sheet 16 guided to the lower end side of the pushing disc 28 by the guide portion 58 is elastically inserted into the locking groove D in sequence by the pushing disc 28 that rotates. It is pushed into and locked.

  Further, a pressing wheel 68 is supported in an idle state on the outer side of the rear side of each pressing disk 28 in a close state. The left and right pressing wheels 68, 68 are supported in a posture inclined to the left and right inside so as to approach each other downward in the rear view, and the agricultural sheet 16 and the engagement with the left and right ends locked to the locking grooves D. The soil or the like in the vicinity of the stop groove D is configured to be pressed toward the left and right outer hem u1 side of the outermost side ridge U.

  The supporting structure of the pressing wheel 68 will be described. Each pressing wheel 68 supports a pressing side arm 69 projecting rearward in the middle portion of the locking side stay 64 on the near side so as to be swingable up and down. The upper end side of the pressing rod 71 in the vertical direction is attached and fixed to the rear end portion, and the pressing wheels 68 corresponding to the lower end portions of the left and right pressing side rods 71 are rotatably supported. A tension spring 72 is provided between the pressing side arm 69 and the locking side stay 64, and the pressing side arm 69 is a side that presses the agricultural sheet 16 and the like by the tension spring 72. It is biased to the moving side.

  Each of the left and right locking side arms 62 is bent at a position near the front, and an engagement ring 73 having a circular shape in side view is integrally formed at the bent portion. By hanging a wire or the like between the engagement rings 73 of the left and right locking side arms 62 and hooking and engaging the left and right center portions of the wire with the hook portion of the crane, the crane can be lifted and conveyed. Thus, it is possible to easily carry out the work of loading and unloading the present seat laying apparatus 6 in a state of being removed from the traveling machine body 3 on a loading platform such as a truck.

  Further, each locking side rod 63 is provided with an operation lever 74 in the front-rear direction that protrudes rearward. An operator on the rear side of the seat laying device 6 holds the operation lever 74 and moves it to the locking side. By swinging the arm 62 up and down to move the push disk 28 and the push wheel 68 up and down, it becomes easy to perform a push / press release operation and a push / push release operation.

  The guide roller 29 is formed in a columnar shape extending in the left-right direction, and the outer peripheral surface side is formed of an elastically changeable member such as a sponge. The total length of the guide roller 29 is set to be shorter than the total length of the sheet roll 18 (agricultural sheet 16), and the left and right positions of the center of the guide roller 29 coincide with the left and right positions of the center of the sheet roll 18. Composed.

  The guide roller 29 includes a pair of left and right guide side arms 76 and a guide disposed between the left side engagement side arm 62 and the engagement side rod 63 and the right side engagement side arm 62 and the engagement side rod 63. The side rod 77 is supported by itself so as to be rotatable about its axis.

  Specifically, the pair of left and right guide-side arms 76 and 76 are respectively supported at the left and right symmetrical positions of the main frame 19 via the left and right rotation shafts 78 so that the entire left and right guide side arms 76 and 76 rotate up and down. The base end portion of the guide side rod 77 extending in the crossing direction of the guide side arm 76 (in the direction shown in FIG. 1) is attached and fixed to the distal end portion of each guide side arm 76 by a guide side fixture 79. Yes.

  The left and right pivot shafts 78 are arranged on the same axis, and the left and right guide-side arms 76 are connected to each other by a connecting rod 81 in the left-right direction. The rod 77, the right guide side arm 76, and the guide side rod 77 are vertically rotated around the rotation shaft 78 while always maintaining the same posture.

  And between the front-end | tip parts of the left and right guide side rods 77, a guide roller 29 is installed and supported so as to be rotatable around its own axis. Incidentally, by gripping the connecting rod 81, it is possible to easily perform the turning operation around the turning shaft 78 of the guide side arm 76.

  Further, the guide roller 29 is rotated around the rotation shaft 78 so that the guide roller 29 has a guide state in which the distal end side of the guide side arm 76 protrudes rearward and the distal end side of the guide side rod 77 extends downward. The side arm 76 is configured to be switchable between a retracted state in which a distal end side of the side arm 76 protrudes upward and a distal end side of the guide side rod 77 extends rearward. A lock pin 82 is provided on the proximal end side of the guide side arm 76 so as to be freely engageable and disengageable for fixing and releasing the posture of each guide side arm 76 and each guide side rod 77 in the guide state and the retracted state. It has been.

  In the guide state, the guide roller 29 is located directly below the sheet roll 18 and obliquely above the front side of the pushing disk 28 in a side view. For this reason, the guide roller 29 in the guide state is elastically brought into contact with the agricultural sheet 16 fed downward from the sheet roll 18 from the rear side to apply tension to the front side, and is applied by rotation operation. The agricultural sheet 16 in contact therewith is configured to be guided without slack to the guide portion 58 side (the pushing disk 28 side) on the rear obliquely lower side.

  On the other hand, in the retracted posture, the guide roller 29 is configured to retract to the upper side of the main frame 19 and greatly open the rear side of the sheet roll 18, thereby facilitating the attachment / detachment work of the sheet roll 18. As well as improving the main tennability.

  Each guide-side fixture 79 described above is fixed so as to be movable in the axial direction of the guide-side arm 76, and each guide-side rod 77 described above is fixed to the guide side so as to be adjustable in its axial direction. The tool 79 is inserted and fixed. Therefore, the position of the guide roller 29 in the guide state can be adjusted forward and backward and up and down, and by this position adjustment, an appropriate tension is applied to the agricultural sheet 16 to be guided according to the working state and the state of the farm field. It becomes possible. For this reason, the slack of the agricultural sheet 16 can be prevented more efficiently, and a more stable guide can be performed.

  Further, a pair of upper and lower string-like (rod-like) contact bodies 83 projecting outward are provided at the distal ends of the left and right guide-side rods 77 (the left and right end sides of the guide roller 29). . The pair of upper and lower abutting bodies 83 are vertically curved toward each other toward the distal end side in addition to approaching each other vertically toward the distal end portion that is the protruding end side. Each contact body 83 is configured to be elastically deformable at least at the front end side, and elastically contacts the agricultural sheet 16 guided rearward and obliquely downward by the guide roller 29 from the rear surface side. Is more efficiently prevented from loosening. Incidentally, in order to make contact with the contact body 83 in this way, it is necessary to make the total length of the guide roller 29 shorter than the total length of the sheet roll 18 as described above.

  The sheet roll 18 is supported on the main frame 19 side via the support mechanism 27 as described above. The support mechanism 27 constitutes a parallel link that translates the sheet roll 18 left and right. For this reason, when the feeding position from the sheet roll 18 is not appropriate, it is possible to appropriately hold the feeding position of the agricultural sheet 16 by finely adjusting the left and right positions.

  The roll stays 31 are installed on the upper and lower ends of the roll struts 86 in the vertical direction, with the lower end sides attached and fixed to the left and right inner ends of the left and right extension frames 33 via stay-side fixtures 84. It is comprised from the roll receiving part 87 of the side view U shape. The spare sheet roll 18 is placed on and supported by the left and right roll receiving portions 87. The left and right stay side fixtures 84 also function as fastening tools for fastening and fixing the horizontal frame 32 and the left and right extension frames 33 respectively.

  The sheet laying device 6 configured as described above is connected to the traveling machine body 3 in a non-offset state with a good left-right balance, and includes a groove forming disk 26, an insertion part 54a having a bottom side forming part 59, a pushing disk 28, A pair of pressing wheels 68 are provided on the left and right, respectively, and the left and right sets of groove forming disks 26, insertion portions 54a, and pushing disks 28 are arranged in a straight line in the front-rear direction.

  The groove forming disk 26, the pushing disk 28, and the pressing wheel 68 are rotated in the forward rotation direction as the vehicle body moves forward without requiring power by contact with the farm scene or the agricultural sheet 16 side. For this reason, it is not necessary to transmit the rotational power of the engine side power on the traveling machine body 3 side to the seat laying device 6 side by the PTO shaft or the like. On the other hand, the agricultural sheet 16 is also automatically removed from the sheet roll 18 as the vehicle body moves forward, for example, by locking a portion fed from the sheet roll 18 to the rear side of the sheet laying device 6 on the farm field side. It will be in the state which will be extended and operated.

  In this way, the agricultural sheet 16 is fed from the sheet roll 18 as the vehicle travels forward, and the groove forming disk 26, the pushing disk 28, and the pressing wheel 68 are rotated to the forward rotation side, thereby The formation operation of the stop groove D and the engagement of the agricultural sheet 16 to the engagement groove D are performed at the same time, and the covering operation to the plurality of baskets U arranged side by side is performed smoothly and quickly.

Next, based on FIG. 5, means for covering the straw U with the agricultural sheet 16 using the sheet laying device 6 will be described.
FIG. 5 (A) is a rear view showing the formation state of the locking groove by the groove forming disk, and (B) is a rear view showing the state of the coating operation of the agricultural sheet by the pressing disk and the pressing wheel, (C) is a rear view which shows the state of the agricultural sheet | seat with which the end side was latched by the latching groove.

  When the vehicle body travels forward in the direction in which the flange U is formed, the locking groove D is formed in the hem side u2 on the left and right outer sides of each outermost flange U by the rotation operation of the groove forming disk 26, and the locking groove D Is enlarged by the bottom side forming portion 59 of the insertion portion 54a. Subsequently, the left and right end sides of the agricultural sheet 16 that are sequentially fed to the farm scene side as the vehicle body moves forward are guided by the guide portion 58 directly below the pushing disk 28, and then partially in the locking groove D. Is pushed and locked in the locking groove D by the rotation operation of the pressing disk 28 into which the disk is inserted to the normal rotation side.

  At this time, the left and right positions of the pushing disk 28 are set so that the inner side of the agricultural sheet 16 is pushed into the locking groove D by the pushing disk 28 at a predetermined distance in the left and right direction. The sheet 16 is folded in the locking groove D, and the left and right ends are exposed upward from the locking groove D. Incidentally, in this way, in order to expose the left and right ends of the agricultural sheet 16 from the locking groove D, the value of the predetermined distance is set. Specifically, the locking groove D of the agricultural sheet 16 is set. It is set to a value that is larger than the amount of insertion.

  Subsequently, the pressing wheel 68 presses the agricultural sheet 16 and the soil in the vicinity thereof to the outermost side U side, so that the open end side of the locking groove D becomes narrow and substantially closed. Thus, the agricultural sheet 16 is reliably locked in the locking groove D.

  And when the operator pulls up the exposed portion 16a protruding from the locking groove D of the agricultural sheet 16, the locking of the agricultural sheet 16 on the heel U hem side is released, and the exposed portion 16a is covered with a plurality of ridges U. It is possible to quickly remove the agricultural sheet 11. At this time, simultaneously with the removal from the ridge U, the agricultural sheet 16 can be rewound to form a sheet roll.

Next, the configuration of the sheet roll 18 will be described in detail with reference to FIGS.
FIG. 6A is a main part plan view showing the structure of the support mechanism, and FIG. 6B is a front view of the main part showing the structure of the regulating mechanism. The support mechanism 27 that supports the sheet roll 18 includes a pair of left and right support arms 88 and 88 that project rearward from the left and right outermost ends (in the illustrated example) of the main frame 19, and left and right support arms 88 and 88. The sheet roll 18 in the left-right direction is supported between the rear end sides so as to be rotatable about its own axis.

  The front end of each support arm 88 is supported by the main frame 19 so as to be rotatable left and right, while the rear end of each of the left and right support arms 88 is inserted through the axial center of the sheet roll 18 and passes through the sheet roll. The left and right end sides of the left and right roll shafts 89 supported between the left and right support arms 88 are supported so as to be rotatable left and right. As described above, the support mechanism 27 constitutes a parallel link that translates the sheet roll 18 in the lateral direction by the roll shaft 89, the left and right support arms 88 and 88, and the main frame 19.

  From the rear end of each of the left and right support arms 88, a lever operation tool 91 in the front-rear direction is integrally extended toward the rear. Each of the left and right lever operating tools 91 is configured to swing left and right integrally with the support arm 88 with the front end side of the support arm 88 as a fulcrum. The support arm 88 connected and fixed and the lever operation tool 91 as a whole have a wedge shape in side view.

  The support mechanism 27 configured as described above is provided with a restriction mechanism 92 that restricts the left-right parallel movement of the sheet roll 18 in a basic posture in which the support arms 88 and the lever operation tool 91 face the back side. The restricting mechanism 92 includes a lock-side frame 93 in the front-rear direction that is integrally projected rearward from the left and right side ends of the main frame 19 and a cylindrical shape in the up-down direction that is fixed to the rear end portion of the lock-side frame 93. And a rod-like switching member 96 inserted and supported by the cylindrical portion 94 so as to be slidable up and down.

  The switching member 96 has an upper portion bent in an inverted U shape with respect to a lower portion and a middle portion extending in the vertical direction, and is directed downward from the center portion of the inverted U shape portion of the switching member 96. A rod-shaped restricting body 97 is projected. The switching member 96 is rotatable about the axis of the portion inserted through the cylindrical portion 94 so as to be movable up and down.

  Then, first, the support arm 88 is switched to the basic posture, and then the entire switching member 96 is moved upward, and then the switching member 96 is rotated so that the upper side faces the inner side. When the switching member 96 is moved downward, the support arm 88 in the basic posture is positioned between the upper portion of the switching member 96 and the restricting body 97, and the lock in which left-right swinging is restricted by being sandwiched between the two members. It becomes a state. On the other hand, when the entire switching member 96 is moved upward from this locked state, and then the switching member 96 is rotated so that the upper side faces outward, the locked state is released, and the lever operating tool 91 is By the left-right swing, the unlocked state is obtained in which the sheet roll 18 can be freely translated in the left-right direction.

  FIG. 7 is a principal cross-sectional plan view showing the configuration of the roll shaft. As shown in FIGS. 2, 6, and 7, a U-shaped support body 98 in a side view is fixed to the upper side of the rear end portion of each support arm 88, and the left and right support bodies 98 are provided with bearing portions 99, The left and right ends of the roll shaft 89 are supported so as to be rotatable about the axis.

  The roll shaft 89 includes a cylindrical main shaft 101 that is open on both sides and extends in the left-right direction, and a support shaft 102 that is inserted and fixed at both ends of the main shaft 101.

  Disc-shaped positioning members 103 are provided at symmetrical positions of the main shaft 101. The sheet roll 18 is inserted in the main shaft 101 on the inner peripheral surface side of the core material 17, and the left and right ends of the core material 17 (sheet roll 18) are clamped by the left and right positioning members 103, so that the left and right positions are fixed or The main shaft 101 is attached and supported in a substantially fixed state.

  Each of the left and right support shafts 102 is divided into a left and right inner shaft 104 and an outer shaft 106 by a surface inclined obliquely with respect to its own axial direction.

  The inner shaft 104 disposed on the left and right inner sides is integrally formed of synthetic resin, and has a screw hole 104a penetrating the shaft center, and the outer periphery of the inner shaft 104 is fitted and inserted into the inner peripheral side of the main shaft 101. Therefore, the positioning member 103 is detachably fixed to the inner peripheral side of the main shaft 101. Incidentally, the fixing / fixing release of the inner shaft 104 to the main shaft 101 side by the positioning member 103 is performed by a rotation operation of the lock lever 107 installed in the positioning member 103, but by fixing / releasing the lock lever 107, The positioning member 103 itself is also fixed and released to the main shaft 101 side.

  The outer shaft 106 arranged on the left and right outer sides includes an outer cylinder shaft 106a having the same outer diameter as the inner shaft 104, and an inner cylinder shaft 106b having an outer diameter substantially the same as or slightly smaller than the inner diameter of the outer cylinder shaft 106a. It is configured. Flange portions that extend radially outward are integrally formed at the left and right outer ends of the outer cylinder shaft 106a and the inner cylinder shaft 106b, which form the same axis as the inner shaft 104 and form part of the support shaft 102. In addition, the inner cylindrical shaft 106b is fitted and inserted into the inner peripheral surface of the outer cylindrical shaft 106a.

  When a bolt 108 with a knob is inserted into the inner peripheral side of the inner cylinder shaft 106b with the bearing 99 positioned between the flange portions of the outer cylinder shaft 106a and the inner cylinder shaft 106b, the tip of the inserted bolt 108 is inserted. Reaches the inner shaft 104 and is inserted into the screw hole 104 a of the inner shaft 104. In this state, by tightening the bolt 108, the outer cylinder shaft 106a and the inner cylinder shaft 106b are fastened to form an integral outer shaft 106, and the inclined surfaces of the outer shaft 106 and the inner shaft 104 are substantially completely. An overlapping and integral support shaft 102 is configured, and the bearing portion 99 is sandwiched between the flange portions of the outer cylinder shaft 106a and the inner cylinder shaft 106b. As described above, the support shaft 102 is fixed to the main shaft 101 by the positioning member 103. In this fixed state, the main shaft 101 and the support shaft 102 are integrally rotated.

  On the other hand, according to the above-described configuration, when the knob 108a is gripped and the engagement of the inner shaft 104 of the bolt 108 with the knob from the screw hole 106a is released, the support shaft 102 is separated into the inner shaft 104 and the outer shaft 106. Accordingly, it is possible to remove the bearing portion 99 from the outer cylinder 106. As described above, it is possible to remove the sheet roll 18 from the left and right support arms 88 in a state where the main shaft 101 and the inner shaft 104 are mounted. Therefore, the left and right roll stays 31, 31 hold the sheet roll 18 with the main shaft 101, the positioning member 103, and the left and right inner shafts 104 mounted thereon. This makes it possible to quickly attach and detach the sheet roll 18.

Next, another usage pattern of the sheet laying device 6 will be described with reference to FIG.
FIG. 8A is a side view when the sheet laying device is not used, and FIG. 8B is a rear view when the agricultural sheet 16 is laid on the flat ridge U. FIG. As shown in FIG. 5A, when the seat laying device 6 is detached from the traveling machine body 3 and stored, a stand 109 is attached to the ground side fixing tool 43 instead of the installation wheel 24, This improves the stability when it is grounded to the ground. As shown in FIG. 5B, the sheet laying device 6 can lay agricultural sheets 16 not only on the high fence U but also on the flat fence U. Specifically, the type of the side cover 53 is changed to one having a low vertical height, or the vertical height of the guide roller 29 is adjusted to lower the feeding position of the agricultural sheet 16. . In this way, it can be applied to both flat and high-pitched pieces, so it is highly versatile. By the way, in the flat bowl, the top part u2 is formed flat compared to the high bowl, and the height of the apex is lower than that of the tall bowl.

16 Agricultural sheet (nonwoven fabric)
18 Sheet roll 26 Groove forming disk (groove forming means)
27 Support mechanism (parallel link mechanism, parallel link)
28 Pushing disk (pushing means)
29 Guide roller 53 Side cover 54a Insertion part 58 Guide part 59 Bottom side formation part 68 Pressing wheel 83 Contact body D Locking groove D
U 畝

Claims (6)

It is provided with a pair of groove forming means (26) that respectively form locking grooves (D) along the hem side of the ridge (U) on the left and right outermost ends of the ridge (U) to be covered, and is fed to the farm scene side. Pushing means (28) for sequentially pushing and locking the agricultural sheets (16) thus formed into the locking grooves (D) is provided on the rear side of the pair of groove forming means (26), respectively, and the heel (U) direction This is a sheet laying device for covering the ridge (U) with the agricultural sheet (16) as it travels, and is folded back in the locking groove (D) to lock the end of the agricultural sheet (16). Each pushing means (28) is arranged at a position to push the left and right inner parts into the locking groove (D) from the end of the fed agricultural sheet (16) so as to be exposed from the groove (D) , The front end side of the side cover (53) disposed on the side of (U) is disposed on the rear side of the groove forming means (26). Place a Idokaba (53), the sheet laying device formed an insertion portion to be inserted into the locking groove (D) (54a) on the front end side of the side cover (53). The sheet laying apparatus according to claim 1, wherein a bottom side forming portion (59) for expanding a lateral width on the bottom side of the locking groove (D) is provided at a lower end portion of the insertion portion (54a) . The sheet according to any one of claims 1 and 2, wherein a guide portion (58) for guiding the fed agricultural sheet (16) to the left and right direction pushing means (28) side is disposed on the front side of the pushing means (28). Laying equipment. 4. A pressing wheel (68) that is inclined inwardly in the left-right direction toward the lower side of the rear view so as to press the agricultural sheet (16) toward the heel (U) side is disposed on the rear side of the pushing means (28). The sheet laying device according to any one of the above . A left and right guide roller (29) is supported on the front obliquely upward side of the side view pushing means (28) so as to be rotatable about its axis, and the guide roller (29) has a total length that is greater than the left and right width of the agricultural sheet (16). The rod-shaped contact body (83) that is formed so as to be shorter and elastically contacts the agricultural sheet (16) that is guided obliquely downward and rearward in accordance with the rotation operation of the guide roller (29) is provided as a guide. The sheet laying device according to any one of claims 1 to 4, wherein the sheet laying device is provided on each of left and right ends of the roller (29) . The left and right sheet roll (18) around which the agricultural sheet (16) is wound is supported so as to be rotatable around the axis so that the agricultural sheet (16) is fed out, and the left and right of the sheet roll (18) are supported. The sheet laying device according to any one of claims 1 to 5, further comprising a parallel link mechanism (27) for changing and adjusting the position .

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