JP4711231B2 - Agricultural work vehicle - Google Patents

Description

  The present invention relates to an agricultural work vehicle that performs work in a paddy field or the like.

  Conventionally, as this type, a self-propelled vehicle in which an engine-driven traveling wheel is provided on the distal end side of a frame having a handle at the proximal end and a scraping body as a rear support member is provided below the proximal end side of the frame. This type of work machine is widely used because it employs a simple configuration in which drive wheels are provided on one side of the frame (for example, Patent Document 1 and Patent Document 2).

  A scraping body (Patent Document 1) that digs into the soil is provided at the rear part of the work vehicle. By incorporating a grooved body similar to the scraping body into the work vehicle, the paddy field or the like can be used. A grooving machine that forms a groove can be configured. In this grooving machine, the driving wheel is driven by the driving wheel on the distal end side, and the driving operation and the grooving of the grooving machine are performed using the handle at the base end. Can do.

  Since the work vehicle travels with the drive wheels, it does not require a force to push the drive wheels in the traveling direction.However, the worker must walk on the work vehicle, and if a groove cut body is provided, the groove cut In order to cut the groove by the body, it is necessary to apply a downward force by the handle.

  By the way, a groove cutting body such as the above-mentioned scraping body has a surface in which running resistance increases because it forms a groove by cutting it into the ground while cutting. Further, in the conventional work vehicle, a single drive wheel is provided only on one of the left and right sides of the front side of the frame. Therefore, a steering operation is required to stabilize the direction.

Therefore, in the Japanese Patent Application No. 2004-346533, the same applicant provides an engine-driven drive wheel on the front end side of the frame, a grooved body on the base end side of the frame, and a saddle on the frame. A work vehicle with a handle on the front is proposed.
Japanese Utility Model Publication No. 2-114794 JP 2002-363959 A

  However, in the grooved body of the work vehicle disclosed in the above Japanese Patent Application No. 2004-346533, the upper part of the grooved body is open, and when this grooved body is provided at the rear end of the work vehicle, the vehicle is driven in the field. In addition, mud gets into the grooving body (plow), increasing the weight of the grooving body, increasing the resistance to the ground during running, and the work vehicle does not lift up due to its heavy weight, making the operability of the work vehicle Had an impact. Thus, various problems have arisen due to the mud adhering to the work vehicle.

  Then, an object of this invention is to provide the agricultural work vehicle excellent in operativity, suppressing the problem which arises with adhesion mud.

The invention according to claim 1 is an agricultural work vehicle in which engine-driven drive wheels are provided on the front end side of the frame, and a rear support is provided on the base end side of the frame. And a bottom part formed at the bottom, and a closing member that closes the upper opening of the groove cutting body, the agricultural work vehicle includes a saddle on the frame, and left and right sides of the saddle That is , sheet members are hung on both sides .

The invention according to claim 2 provides an agricultural work vehicle in which engine-driven drive wheels are provided on the front end side of the frame, and a rear support is provided on the base end side of the frame.
The rear support is a grooved body having an upper opening at the top and a bottom formed at the lower part, a rear opening is formed at the rear of the bottom, and the upper opening of the grooved body and the A closing member for closing the rear opening is provided , the agricultural work vehicle is provided with a saddle on the frame, and seat members are suspended on both left and right sides of the saddle .

  According to a third aspect of the present invention, the grooved body includes a filling member filled in the grooved body.

  According to a fourth aspect of the present invention, the filling member is a synthetic resin foam member.

According to the configuration of the first aspect, by closing the upper opening of the groove cut body, mud or soil is prevented from entering the bottom of the groove cut body, and the operability of the work vehicle is improved. Furthermore, since the upper opening is closed, the strength of the grooved body is improved. Further, since the mudguard sheet member is interposed between the frame and the hem of the operator's trousers, mud is prevented from adhering to the hem of the trousers, and the worker is prevented from being contaminated by the mud.

According to the configuration of the second aspect, by closing the upper opening and the rear opening of the grooved body, mud is prevented from entering the bottom of the grooved body, and the operability of the work vehicle is improved. Furthermore, since the upper opening and the lower opening are closed, the strength of the grooved body is improved. Further, since the mudguard sheet member is interposed between the frame and the hem of the operator's trousers, mud is prevented from adhering to the hem of the trousers, and the worker is prevented from being contaminated by the mud.

  According to the configuration of claim 3, since the filling member is provided inside the groove cutting body, the filling member supports the casing constituting the groove cutting body from the inside, whereby the strength of the groove cutting body is further increased. improves.

  According to the fourth aspect of the present invention, the operability of the work vehicle is further improved by adopting a synthetic resin foam material having a low density for the filling member, thereby reducing the weight of the grooved body.

  Preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The embodiments described below do not limit the contents of the present invention described in the claims. In addition, all of the configurations described below are not necessarily essential requirements of the present invention. In each embodiment, an unprecedented agricultural work vehicle is obtained by adopting a new agricultural work vehicle different from the conventional one, and the agricultural work vehicle used in the paddy field etc. will be described.

  Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 to 8 show Embodiment 1 of the present invention. As shown in FIG. 1, a frame 2 of an agricultural work vehicle 1 includes a left frame body 3L in the front-rear direction provided on the left side in the traveling direction, and an upper portion thereof. And a right frame body 3R provided on the right side in the traveling direction. The engine 5 is provided at the base end of the long rod 4 and the gear case 6 is provided at the tip. At the same time, a drive shaft 7 orthogonal to the long rod 4 is supported on the gear case 6. The drive shaft 7 protrudes on the right side in the traveling direction, and as shown in FIG. 2, the right end thereof is pivotally supported by the tip of the right frame body 3R. Further, the rotation of the transmission shaft 8 inserted into the long shaft 4 and connected to the engine 5 is transmitted to the drive shaft 7 via a gear mechanism (not shown) in the gear case 6. . The frame 2 and the long rod 4 are made of a metal pipe material or the like.

  A drive wheel 9 is provided on the drive shaft 7, and the drive wheel 9 has a plurality of scraping plates 12 fixed to the outer peripheral edge of a ring body 11, and a receiving plate 13 is fixed to the tip side of the scraping plate 12. In addition, the other end of the receiving plate 13 is fixed to the outer peripheral edge of the ring body 11, and the ring body 11 is fixed to the boss portion 14 inserted through the drive shaft 7 via a plurality of spokes 15. The boss portion 14 is fixed to the drive shaft 7 in a non-rotating manner. Thus, in this example, the left and right frame bodies 3L and 3R are provided on the left and right in the traveling direction so as to sandwich the drive wheel 9.

  As shown in FIG. 1 and the like, the left frame body 3L has a substantially square shape when viewed from the side, and its distal end 3A is fixed to the gear case 6, and a groove cut body 16 serving as a rear support is formed at the base end 3B. And the rear support 16 supports the rear side of the work vehicle 1 so that the vehicle can run. In addition, the eaves 4 are arranged substantially in parallel on the linear center portion 3C of the left frame body 3L, and the center portion 3C and the eaves 4 are integrally fixed by a fixing member 17.

  As shown in FIG. 8, the groove cut body 16 is formed by symmetrically forming a metal plate with respect to an arbitrary cross section, and the left and right bottom plates 18 and 18 formed in a substantially pyramid shape are opened. A bottom portion 19 joined so as to be θ1 and closed at the lower end, and horizontal plates 20 and 20 that are connected substantially horizontally to the upper ends of the left and right bottom plates 18 and 18 and narrow toward the front in the traveling direction are provided. An upper opening 21 is formed in the upper part of the bottom part 19 sandwiched between the plates 20 and 20, and the ribs 22 with the edges slightly bent upward slightly at the left and right edges of the horizontal plates 20 and 20. , 22 is formed. A cutout portion 24 that is widened toward the rear is formed behind the joint portion 23 in the left and right bottom plates 18 and 18, and a reinforcing member formed in a wing shape is formed in the cutout portion 24. 25 are provided. Further, a rear opening 26 is formed in the bottom 19 from the notch 24 toward the rear. The front side of the bottom portion 19 is formed with an obliquely upward front inclined surface 19A, and the rear side of the bottom portion 19 is formed in a substantially horizontal direction.

  Further, a blocking member that is installed on the left and right horizontal plates 20 and 20 and has a planar shape substantially similar to the planar shape of the grooved body 16 so as to close the upper opening 21 of the grooved body 16. A cover member 27 is provided, and a connection plate 28 is provided at the front center portion of the cover member 27.

  And this connection plate 28 and the said base end 3B are connected, and the groove cutting body 16 is attached to the rear end of the agricultural working vehicle 1. FIG.

  Further, as shown in FIG. 2 and the like, the right frame body 3R has a substantially square shape when viewed from the side, and as described above, the drive shaft 7 is pivotally supported by its tip, The base end is integrally connected to the rear side of the left frame body 3L by a horizontal member 29 in the left-right direction.

  The work vehicle 1 has a saddle 30. The saddle 30 is integrally provided with frame-side mounting receiving materials 31, 31 by welding or the like above the center side of the left and right frame bodies 3L, 3R. The frame portion 32 of the saddle 30 is fixed to the frame side mounting receiving members 31, 31 so that the height can be adjusted. Further, the saddle 30 is provided with a seating portion 33 on the upper portion of the frame portion 32, the seating portion 33 has cushioning properties, the seating portion 33 has a substantially planar shape, and the center line in the front-rear direction is the driving wheel. Nine wheel bodies 11 are arranged along the front-rear direction.

  Further, a mudguard sheet member 34 is suspended on both sides of the saddle 30, and the mudguard sheet member 34 is formed to have a width substantially equal to the front / rear direction of the saddle 30, and its length is suspended from the saddle 30. It is formed so as to reach the vicinity of the drive shaft 7 when lowered. The mudguard sheet member 34 is made of a material having at least flexibility and water resistance.

  Further, a handle 35 is provided on the front side of the saddle 30, and the handle 35 is fixed to the frame portion 32 with a lower end of a vertical rod 36 having a substantially letter-shaped shape, and is attached to a tip side 35A facing the front side of the vertical rod 36. The front and rear sides 37, 38 are provided, and grip portions 39, 39 to be gripped by the hand are provided at the left and right ends of the sides 37, 38, respectively. The vertical rod 36 is a square pipe or the like, and the horizontal rods 37 and 38 are round pipes or the like.

  As shown in FIGS. 2 and 3, the saddle 30 is provided on the frame 2 by a saddle height adjustment mechanism 40 so that the height can be adjusted steplessly. It also functions as a handle position change mechanism that changes the front / rear position of 35. The saddle height adjusting mechanism 40 has mounting portions 41 and 41 projecting from the left and right at the lower part of the frame portion 32, and a longitudinal long hole 42 is formed in the mounting portion 41. A through hole 43 is formed in the frame side mounting receiving member 31, a bolt 44 as a fixing member is inserted into the long hole 42 and the through hole 43, and a nut 45 is screwed to the front end side thereof to be fastened and fixed. Do it. Then, by loosening the bolts 44 and nuts 45 as fastening means, the height of the saddle 30 can be adjusted by the length of the long holes 42 and fixed at that position, and the bolts 44 as fastening means It is fixed at the position adjusted by the nut 45. When changing the position of the handle 35, remove the bolt 44, replace the front and back of the saddle 30, and then align the elongated hole 42 with the through hole 43. By tightening 45, the handle 35 is provided on the rear side. Then, as shown in FIG. 4, the user can operate the vehicle by pushing the work vehicle 1 with the handle 35 disposed on the rear side. Further, the seat portion 33 of the saddle 30 has a portion projecting forward and backward of the attachment portion 41. In this example, since the handle 35 is integrally attached to the saddle 30, the height of the handle 35 relative to the frame 2 is also adjusted by adjusting the height of the saddle 30.

  Further, as shown in FIG. 4 and the like, the work vehicle 1 includes a handle height adjusting mechanism 46 that adjusts the height of the handle 35 steplessly. The handle height adjusting mechanism 46 has a sheath tube 47 whose upper portion is open at the center of the vertical rod 36. The sheath tube 47 is formed larger than the distal end side 36A and the proximal end side 36B of the vertical rod 36. A longitudinal slit 47A is provided, and a distal end side 36A of the vertical rod 36 is slidably inserted from an upper opening, and a lower portion is fixed to the proximal end side 36B, and further, on both upper sides of the slit 47A. The flanges 48 and 48 are protruded with a gap between them, the bolts 49 are inserted into the holes 48A and 48A formed in the flanges 48 and 48, and the nuts 49A are screwed into the bolts 49. Thus, it is fixed at a position adjusted by a bolt 49 and a nut 49A as fastening means.

  Therefore, loosen the bolt 49 and nut 49A, slide the tip side 36A of the vertical rod 36 up and down, and tighten and fix the bolt 49 and nut 49A to adjust the height of the horizontal rods 37 and 38 of the handle 35. can do.

  In the figure, 50 is a grip portion fixed to the upper part of the gear case 6, and 51 is a hood that covers the upper part of the front side of the drive wheel 9 from the left and right, and is fixed to the gear case 6. Further, 52 is a stand, and a base end is rotatably connected to the right side of the fixing member 17 in the traveling direction, and the work vehicle 1 is operated by rotating the stand 52 to the rear side during traveling. The seat 33 of the saddle 30 is above the engine 5.

  A stop switch 53 of the engine 5 is provided on one side of the horizontal rod 38 of the handle 35, and the stop switch 53 and the engine 5 are connected by a flexible operation cable 54. Since the cable 54 has flexibility, it can be used as it is even if the front-rear position of the handle 35 is changed.

  Next, the operation of the above-described configuration will be described. An operator straddles the saddle 30 and grabs the horizontal rods 37 and 38 of the handle 35 and gets on the work vehicle 1. In this case, the saddle height adjusting mechanism 40 adjusts the height of the saddle 30 according to the physique, and the user can get on with the foot on the ground so that the user can operate in an easy posture. Further, the height of the handle 35 can be adjusted by the handle height adjusting mechanism 46. When the engine 5 is started, this rotational force rotationally drives the drive wheels 9 via the transmission shaft 8, the drive shaft 7, etc., and the scraper 12 scrapes the soil G such as paddy field by this rotational drive, and the work vehicle 1 moves forward. With this advance, the grooved body 16 behind the drive wheel 9 cuts into the groove while biting into the soil G, and a groove is formed following the cross-sectional shape.

  In this way, the operator can work by placing his / her foot on the ground while straddling the work vehicle 1 and grips the front handle 35 in this state, so that he / she can ride stably and is self-propelled. The working vehicle 1 can be operated easily. In addition, since a part of the weight can be applied to the grooved body 16 in a posture straddling the saddle 30, a force for causing the grooved body 16 to bite into the soil can be applied.

  Further, when the driving wheel 9 on the front side in the traveling direction is buried in the soil G and does not move during traveling in a paddy field or the like, when sitting on the rear side of the seating portion 33 of the saddle 30 and applying weight, the driving wheel 9 side is lifted, It becomes possible to run. On the other hand, when the resistance of the grooved body 16 increases and stops moving, sitting on the rear side of the seating portion 33 of the saddle 30 and applying weight, the grooved body 16 is lifted, the resistance decreases, and the vehicle can run.

  Furthermore, when performing operations mainly involving corners and corners of the paddy field or turning, if the front and rear positions of the saddle 30 are changed, the handle 35 becomes the rear side and can be operated with the handle 35, for example, The rear side can be lifted by the handle 35 and the vehicle can turn around the drive wheel 9.

  In addition, since the upper opening of the grooved body 16 is closed by the cover member 27, when traveling in the field, the soil rolled up during traveling piles up on the cover member 27, but the cover member 27 during traveling is always Since it is inclined at a constant elevation angle θ2 with respect to the ground, the soil piled up on the cover member 27 backward in the front-rear direction during traveling flows down along the inclined surface of the cover member 27 during traveling. Therefore, the soil does not accumulate on the grooved body 16, and the increase in the weight of the grooved body 16 due to the soil is prevented. As a result, it is possible to perform a quick operation when traveling and changing directions.

  Furthermore, since the left and right horizontal members 20, 20 are integrally connected by the cover member 27 formed in a flat plate shape, the strength of the groove cut body 16 is increased, and the angle θ1 at the bottom of the groove cut body 16 is kept constant. By doing so, deformation of the groove cutting body 16 due to the pressure from the soil generated when cutting the groove during work is prevented, and the groove having a stable shape can be cut.

  The soil rolled up by the drive wheels 9 during running is collected inside the frame 2, but the mudguard sheet member 34 is interposed between the operator's pants and the frame 2, so that the mudguard sheet member 34 is located behind the mudguard sheet member 34. As the soil inside the frame 2 adheres, the soil does not adhere to the bottom of the operator's pants.

  Further, since the mudguard sheet member 34 is flexible, when the work vehicle 1 is cleaned, the mudguard sheet member 34 is lifted to clean the portion covered by the mudguard sheet member 34. Easy.

  Thus, in this embodiment, corresponding to claim 1, an agricultural work vehicle in which engine-driven drive wheels 9 are provided on the distal end side of the frame 2 and a rear support 16 is provided on the proximal end side of the frame 2. 1, the rear support 16 is a grooved body having an upper opening 21 at the top and a bottom 19 formed at the bottom, and a closing member 27 for closing the upper opening 21 of the grooved body 16. With this, mud is prevented from entering the bottom portion 19 of the groove cut body 16, and the operability of the work vehicle 1 is improved. Furthermore, since the upper opening 21 is closed, the strength of the grooved body 16 is improved.

The front Symbol agricultural work vehicle 1 is provided with a saddle 30 on the frame 2, by the suspended sheet member 34 on the left and right both sides of the saddle 30, when caused to travel the work vehicle 1 in the field, the drive wheel 9 intervenes between the mud accumulated in the hoisting frame 2 and the hem of the trousers to prevent the mud from adhering to the hem of the trousers. It will end.

  FIG. 9 shows a second embodiment of the present invention, in which the same parts as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted. In this example, a cover member provided in a grooved body is shown. A rear closing part 55 is formed at the rear end of 27 so as to extend downward so that the rear opening 26 formed behind the bottom part 19 of the grooved body 16 can be closed. Accordingly, the groove cut body 16 becomes a hollow casing in which both the upper opening portion 21 and the rear opening portion 26 are closed, and the operational effect obtained by closing the upper opening portion 21 with the cover member 27 will be described in the first embodiment. As described in detail above, the rear opening 26 is closed by the rear closing portion 55 of the cover member 27, so that the rear opening 26 during traveling of the agricultural work vehicle 1, during direction rotation, or during other operations is used. By preventing the entry of soil from the ground and closing the rear opening 26, the strength of the rear opening 26 of the grooved body 16 is improved, and the strength of the bottom 19 that is pressed to the ground during traveling is also improved. Thus, a groove having a stable shape can be cut. In the present embodiment, the grooved body 16 may not be provided with the notch 24.

  In this way, in this embodiment, corresponding to claim 2, the drive wheel 9 for driving the engine is provided on the distal end side of the frame 2, and the rear support 16 is provided on the proximal end side of the frame 2. In the work vehicle 1, the rear support 16 is a grooved body having an upper opening 21 at the top and a bottom 19 at the bottom, and a rear opening 26 is formed behind the bottom 19. By providing the closing member 27 for closing the upper opening 16 and the rear opening 26 of the groove cut body 16, mud can be prevented from entering the bottom 19 of the groove cut body 16, and the operability of the work vehicle 1 can be improved. improves. Furthermore, since the upper opening 21 and the lower opening 26 are closed, the strength of the grooved body 16 is improved.

  FIG. 10 shows a third embodiment of the present invention. The same reference numerals are given to the same portions as those in the second embodiment, and the detailed description thereof will be omitted. A cover provided with the rear closing portion 55 in the second embodiment. By filling the internal space of the groove cut body 16 which has become a hollow housing by mounting the member 27 with a synthetic resin foam member 56 such as a low density foamed polystyrene as a filling member, the filling member 56 is cut into the groove cut body. The strength of each surface 18, 18 of the groove cutting body 16 is improved by abutting and supporting each surface 18, 18 and the cover member 27 from the inside, and the groove cutting body is caused by the pressure from the soil when grooving. When the surfaces 18 and 18 of the 16 are pressed, the surfaces 18 and 18 are held flat, and the shape of the groove cutting body 16 is stabilized, whereby a groove having a stable shape can be cut. Further, since the filling member 56 is made of a synthetic resin foam member, the grooved body 16 can be made lighter, and the operation at the time of traveling or turning is facilitated.

  In this embodiment, as in the second embodiment, the groove cut body 16 may not be provided with the notch 24.

  As described above, in this embodiment, the same operation and effect as in the second embodiment are obtained, and the groove member is filled with the filling member 56 filled in the groove member 16 in correspondence with the third aspect. Since the filling member 56 supports the casing constituting the groove cut body 16 from the inside, the strength of the groove cut body 16 is further improved.

  Further, in the present embodiment, in correspondence with claim 4, the filling member 56 is a synthetic resin foam member, and therefore, a synthetic resin foam material having a low density is adopted for the filling member 56. The operability of the work vehicle 1 is further improved.

It is a perspective view which shows Example 1 of this invention. It is a perspective view around a saddle same as the above. It is sectional drawing of a saddle height adjustment mechanism same as the above. It is a perspective view which notched a part of handle height adjustment mechanism same as the above. It is explanatory drawing which showed the use condition of the agricultural working vehicle same as the above. It is a perspective view of a groove cutting body same as the above. It is a top view of a groove cutting body same as the above. It is a cross-sectional view of a groove cutting body same as the above. It is a perspective view of the groove cutting body in Example 2 of this invention. It is a cross-sectional view of the grooved body in Example 3 of the present invention.

1 Agricultural work vehicle 2 Frame 3L Left frame body 3R Right frame body 4 Long frame (frame)
5 Engine 9 Drive wheel
16 Grooved body (rear support)
19 Bottom
21 Top opening
26 Rear opening
27 Cover member (blocking member)
53 Mudguard sheet member (sheet member)
56 Filling member G Soil

Claims (4)

In an agricultural work vehicle provided with engine-driven drive wheels on the front end side of the frame and provided with a rear support on the base end side of the frame,
The rear support is a grooved body having an upper opening at the top and a bottom formed at the bottom, and includes a closing member for closing the upper opening of the grooved body ,
The agricultural work vehicle is characterized in that a saddle is provided on the frame, and seat members are suspended on both left and right sides of the saddle . In an agricultural work vehicle provided with engine-driven drive wheels on the front end side of the frame and provided with a rear support on the base end side of the frame,
The rear support is a grooved body having an upper opening at the top and a bottom formed at the lower part, a rear opening is formed at the rear of the bottom, and the upper opening of the grooved body and the A closing member for closing the rear opening ;
The agricultural work vehicle is characterized in that a saddle is provided on the frame, and seat members are suspended on both left and right sides of the saddle . The agricultural work vehicle according to claim 2, wherein the groove cutting body includes a filling member filled in the groove cutting body. The agricultural work vehicle according to claim 3, wherein the filling member is a synthetic resin foam member.

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