JP3653043B2 - Scratching device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a scraping device, and more particularly, to a scraping device that is provided in a traveling body configured to be able to travel and moves on a paddy field by traveling of the traveling body to perform scraping.
[0002]
[Prior art]
An example of such a scraping device is disclosed in JP-A-9-191707. According to the disclosed scraping device, the leveling plate main body is connected to the tractor via the chain, the tractor is driven in the paddy field, and the ground leveling plate main body is moved on the paddy field along with this to perform the scraping. . The leveling plate main body is a long wooden plate extending in the width direction of the tractor while being pulled by the tractor, a standing plate provided in a standing state on the side of the tractor on the flat plate, and a side surface of the standing plate on the tractor side And a pair of hinges that protrude in the width direction of the tractor and extend vertically. The hinge is formed with a plurality of adjustment holes arranged with a predetermined gap in the vertical direction. Each of the tip ends of the pair of chains connected to the tractor is connected to one of a plurality of adjustment holes formed in each of the pair of hinges.
[0003]
Here, if the vertical position of the chain connected to the hinge is changed, the tension angle of the chain connecting the tractor and the hinge changes, and the force of the vertical component that pulls the leveling plate body out of the traction force acting on the chain upward The size of changes. For this reason, the magnitude | size of the force in which a leveling board main body presses a field surface below can be made into a desired magnitude | size by changing the vertical position connected to the hinge of a chain.
[0004]
[Problems to be solved by the invention]
However, if the paddy field has a soft part and a hard part coexisting with the place, even if the padding surface is pressed with a predetermined force by the leveling plate main body, the soft part of the paddy field will have a deeper scratching depth, The padding depth of the surface becomes shallow, and the entire surface cannot be made uniform.
[0005]
In addition, since the leveling plate body is pulled by the tractor via the chain, when the tractor changes direction at the edge of the paddy field, there is a possibility that a place where the ground leveling plate body cannot be scraped will be generated if the chain is loosened and the leveling plate body cannot be pulled. The problem that there is.
[0006]
The present invention has been made in view of such problems, and an object of the present invention is to provide a scraping device capable of scratching almost the entire paddy field and making the scraping depth uniform.
[0007]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the scraping device of the present invention is provided in a traveling body configured to be able to travel (for example, the walking type rice transplanter 1 in the embodiment), and moves on the paddy field by traveling of the traveling body. A plurality of support means (for example, the support device 51 in the embodiment) projecting at a predetermined interval on a side surface extending in the vehicle width direction of the scraper plate, and a scraper plate And a positioning member for positioning the vertical position , each of the plurality of support means is attached to the traveling body, and the scraper plate is attached in a state of extending in the vehicle width direction of the traveling body through the plurality of support means. The support means is attached to the traveling body and extends downward, and is configured to be able to swing up and down at the lower end of the first link member. It is attached and the tip is The second link member connected to the side surface of the plate, one end is attached to the traveling body so that it can swing up and down, and the other end is attached to the tip side of the second link member so that it can swing up and down. The link mechanism is configured to include a third link member configured to be variable, and the positioning member includes a traveling body and a scraper plate or a second link member according to the position of the scraper plate that moves up and down by the support means. It is configured to be connectable.
[0008]
According to the scraping device having the above configuration, the scraping plate is attached to the traveling body via the support means, and the vertical position of the scraping plate is positioned by the positioning member, so that the relative position between the scraping plate and the traveling body is always constant. . For this reason, when the hardness of the paddy field differs depending on the location, even if the scraper plate moves in a different location, the scraping depth by the scraper plate is always constant regardless of the hardness of the paddy surface. can do. In addition, since the scraper plate is attached to the traveling body in a state of being fixed to the traveling body via the support means, even if the traveling body changes direction at the edge of the paddy field, the scraper plate moves together with the traveling body. For this reason, it is possible to perform scraping even at the edge of paddy fields, and it is possible to scratch most of the paddy fields.
[0009]
Further, in the scraping device configured as described above, the scraping plate extends between the pair of sandwiching plates (for example, the plate-like members 43 and 44 in the embodiment) that extend in the vehicle width direction of the traveling body and are opposed to each other. And a scraping member that extends downward in the vehicle width direction of the traveling body and moves on the surface of the traveling body in a state of being sandwiched between the two, and a second link on a side surface of one of the pair of sandwiching plates You may make it connect the front-end | tip part of a member and incline at least the front-end | tip part of the scraping member which protrudes from a pair of clamping board to the other clamping board side.
[0010]
According to the scraping device having the above configuration, since the tip of the scraping member is inclined to the side opposite to the second link member, when the paddy soil is scraped by the scraping member, the scraped soil is changed to the scraping member. Of the acting forces, the force acting in the normal direction of the scraping member is smaller than when the scraping member extends in the vertical direction. For this reason, the load resistance acting on the scraping member is reduced, the load against the movement of the traveling body is reduced, and the scraping operation can be performed smoothly.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a preferred embodiment of the present invention will be described with reference to FIGS. First, before explaining the cutting device according to the present invention, a walking type rice transplanter to which the cutting device is attached will be described. As shown in FIG. 1, the walking type rice transplanter 1 has an engine E mounted on the front upper portion of the machine body 3, and a mission unit 5 that is driven by the driving force of the engine E is attached to the rear side of the machine body 3. . A transmission cover 7 including a transmission shaft (not shown) connected to the transmission unit 5 extends to the rear side of the vehicle at the rear end of the transmission unit 5. A planting mission unit 9 is connected to the front end of the transmission cover 7, and a support frame 11 extending rearward is connected to the rear end of the planting mission unit 9. The front end of the support frame 11 is obliquely upward toward the rear side of the vehicle. A plate-like planting portion 13 extending to the rear and a pair of handle support portions 15 disposed on the vehicle rear side from the planting portion 13 and extending vertically with a predetermined gap in the vehicle width direction are attached. Yes. An upper connecting member 17 and a lower connecting member 19 shown in FIG. 2 are attached to an intermediate portion and a lower portion of the pair of handle support portions 15 so as to extend in the horizontal direction.
[0012]
A pair of transmission cases 21 extending to the rear side of the vehicle with a transmission mechanism (not shown) for transmitting the driving force of the engine E built in the left and right ends of the transmission unit 5 connected to the engine E can swing up and down. A wheel 23 connected to a transmission mechanism is rotatably attached to each tip portion of the pair of transmission cases 21. The pair of transmission cases 21 is connected to an elevating device 25, and the elevating device 25 is configured to move the pair of transmission cases 21 up and down to move the pair of wheels 23 up and down. A float 27 extending in the front-rear direction is attached below the body 3 and below the support frame 11. When the vertical position of the float 27 changes, the lifting device 25 is configured to move the pair of wheels 23 up and down via the transmission case 21 according to the amount of change. Therefore, when the float 27 moves downward, the pair of wheels 23 moves downward to move the float 27 upward, and when the float 27 moves upward, the pair of wheels 23 moves upward to move the float 27 downward. Move.
[0013]
The scraping device 40 is attached to the rear part of the walking type rice transplanter 1 configured as described above. As shown in FIG. 2, the scraping device 40 is provided with a plate-shaped scraping plate 41 extending in the left-right direction (vertical direction in FIG. 2), and a side surface of the scraping plate 41 with a predetermined gap in the left-right direction. A pair of support devices 51 and a positioning member 71 that is connected to the cutting plate 41 and positions the vertical position of the cutting plate 41 are configured.
[0014]
FIG. 3 shows the structure of the scraper plate 41. As shown in FIG. 3, the scraper plate 41 has three long plate-like members 43, 44 and 45 in two upper and lower stages, and the lower stage is the alignment direction. The upper plate member 45 is arranged above the lower plate member 43. The upper plate member 45 is arranged in two rows, with the thin plate-like scraping member 46 sandwiched between the two lower plate members 43, 44. Has been. The three plate-like members 43, 44, 45 and the scraping member 46 are connected and integrated with each other via a plurality of fastening members 47. More specifically, the inner surface of the plate-like member 43 arranged inside the lower plate-like members 43, 44 has a predetermined gap in the longitudinal direction (left-right direction in FIG. 5A). A fastening member 47 extending vertically is disposed, and a bolt 48 is inserted under the fastening member 47. The bolt 48 is further inserted through the lower two plate-like members 43 and 44 and the scraping member 46 and screwed with a nut (not shown), and the two plate-like members 43 and 44 sandwich the scraping member 46. These are integrated. Further, a bolt 49 is inserted into the upper portion of the fastening member 47, and the bolt 49 is further inserted through the upper plate member 45 and screwed into the nut 50, so that the upper plate member 45 is fixed to the fastening member 47. ing. As a result, the three plate-like members 43, 44, 45 and the scraping member 46 form an integrated plate-like scraping plate 41.
[0015]
The plate-like members 43, 44, 45 are made of a material that is difficult to deform, for example, a metal material, and can be exemplified by aluminum, iron, and stainless steel, and preferably made of extruded aluminum and hollow. Good. The fastening member 47 is also formed of a material that is not easily deformed, for example, a metal material, and examples thereof include aluminum, iron, and stainless steel. As shown in FIG. 4, the scraping member 46 is formed in a state in which the tip end portion is bent in an arc shape on the outer side (upper side in FIG. 4). Note that the tip of the scraping member 46 may be in an inclined state as shown by a two-dot chain line in addition to an arc shape. Further, the scraping member 46 may be formed not only at the tip portion but also in a state where the entire portion protruding downward from the lower plate-like members 43 and 44 is inclined in an arc shape or in an oblique direction. The scraper member 46 is preferably formed of a material that is difficult to deform, such as a metal material (aluminum, iron, stainless steel, etc.) or hard rubber.
[0016]
As shown in FIG. 3, a pair of supports disposed with a predetermined gap in the longitudinal direction (vertical direction in FIG. 3) is provided on the lower plate-like member 43 of the scraper plate 41 thus configured. A device 51 is attached. As shown in FIG. 4, the support device 51 is connected to the lower connecting member 19 connected to the handle support portion 15 shown in FIG. 1 so as to be swingable in the vehicle width direction and extend downward. A second link member 59 pivotally connected to the lower end portion of the first link member 52 so as to be swingable up and down and having a tip fixed to the lower plate-like member 43 of the scraper plate 41, and one end of the lower link member 19. And has a third link member 63 pivotally movable up and down and having the other end pivoted up and down on the distal end side of the second link member 59 and has a triangular shape in a side view. The first link member 52, the second link member 59, and the third link member 63 constitute a link mechanism.
[0017]
The first link member 52 has two connecting members 53, 54 that extend vertically, and a long hole 55 that extends vertically is formed at each tip of the connecting members 53, 54. The first link member 52 communicates the long holes 55 and 55 with the two connecting members 53 and 54 extending vertically, and the bolt 56 is inserted into the long hole 55 communicated with the first link member 52 to protrude from the long hole 55. A nut (not shown) is screwed onto the bolt 56 to connect the two connecting members 53 and 54 together. For this reason, the first link member 52 moves the two connecting members 53 and 54 in the direction of approaching or separating from each other in the axial direction, and fixes the first connecting member 53 and 54 to the long holes 55 that are in communication with each other by a bolt 56 and a nut. The extension amount of the link member 52 can be adjusted.
[0018]
The third link member 63 includes a turnbuckle 64 and a connection member 68. The connecting member 68 is a rod-like member, and its base end portion is pivotally connected to the side surface on the front end side of the second link member 59 so as to be able to swing up and down, and a locking pin 69 projects from the side surface of the front end portion. Yes. The base end portion of the connection member 68 may be pivotally connected to the scraper plate 41. One hook 64 a of the turnbuckle 64 is hooked to the locking pin 69, and the other hook 64 b of the turnbuckle 64 is hooked to the lower connecting member 19. Male screw portions 64a1 and 64b1 are formed at the bases of the hooks 64a and 64b, respectively, and male screw portions 64a1 and 64b1 are formed on female screw portions (not shown) formed at both ends of a rotating portion 64c disposed at the center of the turnbuckle 64. Are screwed together. For this reason, when the rotating portion 64c is rotated, the pair of hooks 64a and 64b move in a direction approaching and moving away from the rotating portion 64c, and the extension amount of the third link member 63 can be adjusted. . The connection member 68 of the first link member 52, the second link member 59, and the third link member 63 may be any material that is difficult to deform. For example, a metal material, preferably a plate-shaped iron (sheet metal) that is easy to manufacture. Can be illustrated.
[0019]
The positioning member 71 connected to the scraping plate 41 includes a locking ring 72 attached to the center upper portion of the inner surface of the plate-like member 45 of the scratching plate 41, and the top and bottom of the scratching plate 41 locked to the locking ring 72. And a movement restricting member 77 for restricting movement. As shown in FIG. 3, the locking ring 72 includes a ring-shaped locking portion 74 having a locking hole 73 formed at the tip, and a base portion that protrudes outward from the locking portion 74 and is attached to the plate-like member 45. 75. As shown in FIG. 2, the movement restricting member 77 is T-shaped and has a cylindrical central shaft portion 78 extending in the vertical direction, and a cylindrical horizontal shaft portion 79 extending in the left-right direction from the upper portion of the central shaft portion 78. And is configured. As shown in FIG. 4, the central shaft portion 78 is formed with a plurality of through holes 80 having a predetermined gap in the vertical direction and penetrating in the horizontal direction (perpendicular to the plane of FIG. 4). The central shaft portion 78 is inserted through the locking hole 73 of the locking ring 72, and the locking pins 81 are respectively inserted into the pair of through holes 80 positioned adjacent to the upper and lower sides of the locking portion 74, so that the movement restricting plate 77 is inserted. And the scraper plate 41 are connected to each other. Further, the horizontal shaft portion 79 is coupled to the upper coupling member 17 shown in FIG. 2 via a connection jig (not shown). The movement restricting plate 77 may be made of a material that is difficult to be deformed. For example, the movement restricting plate 77 may be made of a metal material, preferably inexpensive pipe-shaped iron. Note that the movement restricting member 77 may be configured such that the locking ring 72 is attached to the second link member 59 and connected thereto.
[0020]
Next, the case where the paddy field 40 is scraped in the state where the padding device 40 configured as described above is attached to the walking type rice transplanter 1 shown in FIG. 1 will be described. First, when the locking pin 81 is inserted into the through hole 80 of the movement restricting member 77 shown in FIG. 4 and the movement restricting member 77 is locked to the locking ring 72, the locking pin 81 is removed. The vertical movement of the movement restricting member 77 is made free. Subsequently, the height and angle of the scraper plate 41 are adjusted. The height adjustment is performed by loosening a bolt 56 and a nut, which are inserted through the first link member 52 shown in FIG. 4, and moving the two connecting members 53, 54 so that the desired scraping depth H shown in FIG. After moving in the axial direction to make the extension amount of the first link member 52 a length corresponding to the scraping depth H, the two connecting members 53 and 54 are tightened with a tightening tool such as a bolt 56. The angle adjustment is performed by turning the turning portion 64c of the turnbuckle 64 of the third link member 63 so that the second link member 59 is in a horizontal state and the scraper plate 41 is in a vertical state.
[0021]
Subsequently, the locking pins 81 are respectively inserted into the pair of through holes 80 adjacent to the upper and lower sides of the locking ring 72 in the central shaft portion 78 inserted through the locking ring 72 so that the vertical position of the scraper plate 41 is positioned. Insert. Thereby, the scraper plate 41 moves up and down integrally with the airframe 3 via the handle support portion 15 shown in FIG.
[0022]
Subsequently, as shown in FIG. 1, the walking type rice transplanter 1 (hereinafter simply referred to as “rice transplanter 1”) to which the scraper 40 is attached is moved into the paddy field S so that the rice transplanter 1 moves forward. The wheel 23 is rotated. Here, the lower portion of the wheel 23 sinks into the paddy surface 90 of the paddy field S due to the weight of the rice transplanter 1 and has a firm soil that can support the rice transplanter 1 (hereinafter referred to as “solid soil 91”). The rice transplanter 1 is placed in the paddy field S with the wheel 23 in contact with the top (position indicated by the two-dot chain line in FIG. 1). When the rice transplanter 1 moves forward in this state, the soil 92 having a cutting depth H downward from the padding surface 90 is scraped by the cutting member 46 of the cutting plate 41 to form a flat rice pad 90 '.
[0023]
Here, a case where the hardness of the soil 92 to be scraped accumulated on the upper portion of the hard soil 91 differs depending on the place is considered. If the hardness of the soil to be scraped differs depending on the location, when the soil is scraped by the leveling plate main body described in the section of the prior art, the depth of scraping of the soft soil 92a portion becomes deeper and the hard soil 92b portion Therefore, it becomes difficult to scratch the paddy surface with a uniform scraping depth.
[0024]
However, in the scraping device 40 according to the present invention, the scraping plate 41 is in a state where its vertical movement is restricted via the movement restricting plate 77, and the vertical position between the scraping plate 41 and the wheel 23 as long as the wheel 23 does not move up and down. Since the relative position of the scraper plate 41 is not changed, the scraper plate 41 can displace the soils 92a and 92b having different hardness to be scraped together and perform scraping with a uniform scraping depth H. In addition, when the recessed part which is not illustrated is formed in the surface of the firm soil 91 and the wheel 23 moves on the surface of this recessed part, if the wheel 23 moves below, the body 3 will also move below, but the body 3 is moved by the raising / lowering device 25. Return to original position. For this reason, although the relative position of the scraper plate 41 with respect to the wheel 23 moves upward, the relative position in the vertical direction between the scraper plate 41 and the rice field 90 does not change. As a result, the desired scraping depth H can be set to the desired scraping depth above the recess. Further, even when a convex portion (not shown) is present on the surface of the solid soil 91, the desired scratch depth H can be set to the desired scratch depth above the convex portion according to the aforementioned concave portion.
[0025]
Moreover, since the front-end | tip part of the scraping member 46 of the scraping board 41 is formed in the state curved to the back side of the advancing direction of the rice transplanter 1, when scraping the soil 92 of the paddy field S with the scraping member 46, it removes from the soil 92. Of the forces acting on the scraping member 46, the forces acting in the normal direction of the scraping member 46 are smaller than when the scraping member 46 extends in the vertical direction. For this reason, the load which acts on the scraping member 46 becomes small, the load which resists the forward movement of the rice transplanter 1 becomes small, and the scraping work by the rice transplanter 1 can be performed smoothly. Furthermore, since the surrogate plate 41 is attached to the rice transplanter 1 in a state of being fixed to the rice transplanter 1 via the support device 51 and the positioning member 71, even if the rice transplanter 1 changes its direction at the edge of the paddy field S, the surrogate plate 41 remains on the rice transplanter. It turns with 1. For this reason, it is possible to perform scraping even at the edge of the paddy field S, and it is possible to scratch most of the paddy fields 90 of the paddy field S. Moreover, although the walk-type rice transplanter 1 was shown as an example of the traveling body to which the substitute scraper is mounted, the walk-type rice transplanter 1 is not limited to this walk-type rice transplanter 1, and a rice transplanter, a tractor, a walk-type cultivator, etc. on which an operator can board. The tailor who can do the scraping work is good.
[0026]
【The invention's effect】
According to the scraping device according to the present invention, the scraping plate is attached to the traveling body via the supporting means, and the vertical position of the scraping plate is positioned by the positioning member, so that the relative position of the scraping plate and the traveling body is always constant. is there. For this reason, when the hardness of the paddy field differs depending on the location, even if the scraper plate moves in a different location, the scraping depth by the scraper plate is always constant regardless of the hardness of the paddy surface. can do. In addition, since the scraper plate is attached to the traveling body in a state of being fixed to the traveling body via the support means, even if the traveling body changes direction at the edge of the paddy field, the scraper plate moves together with the traveling body. For this reason, it is possible to perform scraping even at the edge of paddy fields, and it is possible to scratch most of the paddy fields.
[0027]
In addition, when the tip of the scraping member is inclined to the side opposite to the second link member, when the paddy soil is scraped by the scraping member, the force acting on the scraping member from the scraped soil The force acting in the normal direction of the scraping member is smaller than when the scraping member extends in the vertical direction. For this reason, the load resistance acting on the scraping member is reduced, the load against the movement of the traveling body is reduced, and the scraping operation can be performed smoothly.
[Brief description of the drawings]
FIG. 1 is a front view of a walking type rice transplanter equipped with a scraping device according to an embodiment of the present invention.
FIG. 2 is a perspective view of a scraping device according to an embodiment of the present invention.
FIGS. 3A and 3B show a scraper plate according to an embodiment of the present invention, in which FIG. 3A is a front view of the scraper plate, FIG. 3B is a plan view of the scraper plate, and FIG. FIG. 3 is a side view of the scraper plate.
FIG. 4 shows a side view of the scraping device according to one embodiment of the present invention.
[Explanation of symbols]
1 walking rice transplanter (running body)
40 Scraping device 41 Scraping plates 43, 44 Plate-like members (clamping plates)
51 Support device (support means)
52 First link member 59 Second link member 63 Third link member 71 Positioning member 90 Surface S Paddy field

Claims (1)

Provided in a traveling body configured to be able to travel, a plate-shaped scoring plate that moves on the surface of a paddy field by traveling of the traveling body, and a side surface extending in the vehicle width direction of the scoring plate has a predetermined interval. A plurality of support means projecting and having a positioning member for positioning the vertical position of the scraper plate,
Each of the plurality of support means is attached to the traveling body, and is configured to be mounted in a state where the scraping plate extends in the vehicle width direction of the traveling body via the plurality of support means,
The support means is attached to the traveling body and extends downward to be variable in extension, and is attached to the lower end portion of the first link member so as to be swingable up and down. Has a second link member connected to the side surface of the scraper plate, one end attached to the traveling body so as to be able to swing up and down, and the other end swingable up and down toward the tip side of the second link member. And a third link member that is configured to be variable in extension amount, and constitutes a link mechanism,
The positioning member is between the traveling body and the scraping plate or the second link member connected to the traveling body and the scraping plate according to the position of the scraping plate that moves up and down by the support means . It is comprised so that connection is possible, The scraping apparatus characterized by the above-mentioned.

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