JP2018093828A - Cutter for multi-transplanter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To cut a multi sheet of a multi-transplanter smoothly and certainly in a field.SOLUTION: The cutter for multi transplanter according to the present invention is connected to a planting work machine 9 behind a traveling machine body 1, in a multi-transplanter cutter provided with a sheet 13 in a rolled form drawn out to the planting work machine 9 in conjunction with the planting travel of the traveling machine body 1 and covering the field surface and a cutter 21 having cutting teeth 24 formed in a sawtooth shape in the left and right direction for cutting the sheet 13 at the coating ending position, the tooth tips of both left and right sides of the cutting teeth 24 are sequentially displaced to the high position toward the center side of the traveling machine body 1. The curve representing the tooth tip displacement forms a plurality of arches within the lateral length of the cutting teeth 24.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a cutter for a multi transplanter such as a rice transplanter.

  In general, as a multi-transplanter that transplants seedlings while laying a multi-seat on a farm scene, as shown in Patent Document 1, a planting work machine is connected to a traveling machine body and a roll in the left-right direction on the work machine side. It is known that a multi-sheet is supported and transplanted at the same time while the sheet is fed out as it travels.

  And the said multi transplanter is equipped with the cutter which cut | disconnects a sheet | seat in the position when planting is complete | finished at the edge part etc. of a farm field. This cutter has serrated teeth that are long in the left-right direction. At the planting end position, the cutter is lowered onto the sheet laid on the field to separate the laid sheet from the roll-side sheet. Is.

JP 11-196682 A

  However, in the arrangement of the cutting teeth of the conventional cutter as shown in Patent Document 1 above, the tooth tips are aligned straight across the entire left and right length corresponding to the width of the working machine. For this reason, when a cutter is pressed against a sheet laid in a farm scene, there is a problem that a part of the cutting teeth is not inserted into the soil and the sheet is not cut in a hard field or a field with little water.

  The cutter of the present invention for solving the above-mentioned problem is firstly connected to a planting work machine 9 behind the traveling machine body 1, and is fed to the planting work machine 9 as the traveling machine body 1 is planted. In the multi-grafting machine cutter provided with a roll-shaped sheet 13 for covering the field scene and a cutter 21 having a cutting tooth 24 formed in a horizontal sawtooth shape for cutting the sheet 13 at the coating end position, It is characterized in that the tooth tips on the left and right sides of the tooth 24 are sequentially displaced to a higher position toward the center side of the traveling machine body 1.

  Secondly, the curve representing the displacement of the tooth tip forms a plurality of arches within the left and right length of the cutting tooth 24.

  Third, the tooth 25 of the cutting tooth 24 is composed of a large tooth 25a having a relatively high tooth height and a small tooth 25b having a low tooth height, and the large tooth 25a and the small tooth 25b are provided alternately and the large tooth 25a. Each of the small teeth 25b is characterized in that a curve representing the displacement of the tooth tip is formed in an arch shape.

  Fourth, the tooth tip of the largest tooth 25a in the cutting tooth 24 is formed at a position lower than the tooth tip of the lower tooth 25b.

  Since the present invention is configured as described above, the tooth tips of the cutting teeth from the left and right ends of the cutter are sequentially displaced to a high position as they approach the center of the machine body. When the cutter is driven down, the tip of the cutter gradually pierces the sheet in the order from the outer teeth to the inner teeth, so that the sheet itself is cut while being stretched to the left and right sides. For this reason, the sheet itself is smoothly and reliably cut without making a wrinkle with less resistance than when all the cutting teeth are pressed simultaneously.

  By forming lines connecting the tooth tips of the dentition into a plurality of arched shapes, cutting teeth that pierce the sheet in advance at positions other than the left and right ends of the cutter and cutting teeth at higher positions that pierce sequentially thereafter Since the combination is formed and the pushing pressure of the cutter is distributed to a plurality of parts, it is possible to prevent an excessive load from being applied to the cutting teeth that are pierced in advance, and it is possible to cut the sheet with a shallower insertion depth.

  Since the cutting teeth are composed of large teeth and small teeth that are alternately arranged, the small teeth are inserted after the large teeth are first inserted at the time of sheet cutting, so that the pushing resistance (load) to the teeth is distributed between the large and small. Overload is avoided. Further, since the tooth tip of the largest tooth at the highest position is lower than the tooth tip of the lower tooth at the lowest position, insertion of the small teeth starts and ends after all the large teeth have been stabbed, so 2 There is an advantage that the resistance (load) of the plug-and-cut is more reliably distributed by the plug-and-cut of the stage.

It is a whole side view of the transplanter to which the cutter of the present invention is applied. It is the whole top view of a transplant machine similarly. (A), (B) is the front view and rear view of a cutter, (C) is the partial expanded rear view of a cutter. (A), (B), (C) is the rear view which contrasted the indentation depth required for the cutting | disconnection at the time of the cutting | disconnection operation | work of the cutter in a respectively different Example.

  1 and 2 are an overall side view and a plan view of a multi-transplanter (rice transplanter) to which a cutter of the present invention is applied. A traveling machine body 1 is supported by front and rear wheels 2 and 3 so that it can travel. A bonnet 4 that accommodates the engine is disposed in front of the airframe 1, a steering handle 6 that constitutes a control unit and a seat seat 7 on which an operator is seated are disposed behind the vehicle body 1. A planting work machine 9 is connected via 8 to be movable up and down. This planting work machine 9 (hereinafter, simply referred to as “work machine”) is tilted forward at the top and a seedling platform 11 on which mat seedlings (not shown) are placed on the back, and the mat seedlings are arranged in a plurality of strips behind the lower end A well-known planting part 12 that is scraped and sequentially scraped and planted in a farm field is provided integrally with the work machine frame 10.

  Since the transplanting machine of the present invention is a multi- transplanting machine, a multi-sheet (hereinafter simply referred to as “sheet”) 13 made of recycled paper or the like wound in a roll shape is accommodated in front of the lower end side of the planting work machine. A cylindrical seat case 14 that extends the seat 13 backward in accordance with the width and the planting work corresponding to the width is provided so as to constitute a part of the work machine frame. The seedling planting by the planting unit 12 is performed on the sheet 13 fed out to the farm scene.

  A plurality of sheet guides 16 for guiding the sheet 13 to be fed rearward from the lower side are provided at the lower part of the seat case 14 so as to project rearward by pivoting the rear end so as to be able to swing up and down. A roller float (sensor float) 17 consisting of a pair of cylindrical bodies swinging up and down is supported by an equalizer arm 18 so as to be installed horizontally, and further behind it is a pressure reducing roller 19 that presses the fed sheet 13 against the field. Is rotatably supported and installed. A cutter 21 that cuts the sheet 13 in the left-right direction at the position at the end of the planting work cycle is provided behind the pressure reducing roller 19 so as to be able to swing up and down.

  The cutter 21 pivotally supports the base end portion side of a rod-like cutter frame 22 in which base end portions protruding rearward on both outer sides of the work machine 9 are formed in a T shape. At the rear ends of both cutter frames 22, plate-like cutting teeth 24 are laid downward through a left-right reinforcing plate 23 (see FIG. 3A). An inner wire of an operation wire 26 that swings and operates the cutter frame 22 is connected to the base end portion of the cutter frame 22, and the operation wire 26 is pulled and moved, so that the cutting teeth 24 at the rear end are moved down. The sheet 13 is cut at a predetermined position. After the sheet 13 is cut, the rear end of the cutter frame 22 is raised and restored by a spring 27 stretched between the base end side and the work machine frame 10 side.

  On the other hand, behind the seat 7 on the traveling machine body 1, an operation lever 31 is pivotally supported by an operator via a bracket 29 attached to a multi-frame 28 made of a pipe bent in a mountain shape. One end of the operation wire 26 is connected to the base end portion of the operation lever 31.

  By swinging the operation lever 31 back and forth, the cutter 21 is elastically driven to swing, and a manual cutting operation of the sheet 13 is performed. In addition, the bracket 29 can be operated by an actuator (not shown) such as a motor or a solenoid (not shown) that pulls and drives the operation wire 26 by power. In this case, the operation wire 26 is linked to the operation of the work machine 9 using a sensor or the like. Then, the cutter 21 is driven, and manual and automatic can be selectively performed.

  On both left and right ends of the multi-frame 28, roll holders 32 that support the roll-shaped preliminary sheet 13 are pivotally supported so as to be horizontally rotatable in a posture in which the roll protrudes sideways from the front, and the roll holder 32 is a roll-shaped sheet. Grasping claws 32a and 32b for grasping one end of 13 from above and below and horizontally supporting it in a cantilever manner are provided. With this mechanism, spare rolls (sheets) 13 for replenishment and replacement are stocked while being supported on both the left and right sides of the traveling machine body 1 in the front-rear direction, and when the rolls are replaced, they are horizontally rotated by about 90 ° as shown in FIG. The roll case 14 can be moved and removed to remove the roll, and the roll case 14 can be replaced and replenished.

  3-5 shows the Example of the cutting tooth 24 used for the cutter 21 of this invention, Among these, FIG. 3, FIG. 4 all show 1st Example of this invention. In this first embodiment, as shown in the figure, the sawtooth teeth 25 of the cutting teeth 24 are formed by alternately forming two kinds of large teeth 25a and small teeth 25b having different tooth heights and widths. The size ratio between the tooth height and the tooth width of the large tooth 25a is approximately 2.3 to 2.4.

  Further, in this embodiment, the lines connecting the respective tooth tips (hereinafter referred to as “dental curve” La and Lb) are formed in an arcuate arc and an upward arched shape, as shown in FIG. In the example, two arches that are symmetrical and have the same curvature are formed. In this example, the large teeth 25a are aligned at the left and right ends and the center and protrude to the lowest position, and two left and right double dentition curves La and Lb are formed. Both dentition curves La and Lb are concentric circles. In addition, the tooth tip of the highest tooth 25a in the cutting tooth 24 is formed at a lower position than the tooth tip of the lower tooth 25b.

  That is, assuming that the upper surface GL of the sheet 13 laid in the farm scene is a horizontal plane, as shown in FIG. 3C, the tooth tip height Ha of the highest tooth 25a 'at the highest position is the lower tooth 25b' at the lowest position. Is lower than the tooth tip height 25b ′ by ΔH. As a result, when the cutter 21 is driven down, the highest tooth 25a 'at the highest position is inserted into the horizontal upper surface GL of the sheet 13, and the lower tooth 25b' at the lowest position is inserted.

  At this time, the large teeth 25a and small teeth 25b of the cutting teeth 24 are pierced into the upper surface GL of the sheet 13 in order from the outermost large teeth 25a and small teeth 25b at the left and right ends. The sheet 13 is cut in the order from at least the outside to the inside, not the entire left and right width.

  And even when the sheet 13 and the field scene below it are uneven, the sheet 13 is cut while being stretched toward the outside of the arches of the dentition curves La and Lb as compared with the case where the sheet is cut at the full width at the same time. Therefore, the sheet 13 does not become wrinkles when the cutter is driven down, and the sheet 25 is cut smoothly and reliably with less resistance to the teeth 25a and 25b.

  In the example shown in FIG. 3, the arches of the dentition curves La and Lb are divided into left and right parts, and two arches are formed respectively. The lowermost large teeth 25a and small teeth 25b are pierced from the upper surface GL of the sheet 13 and cutting progresses in the order toward the center of each arch.

  4 (A) to 4 (C) are front views showing tooth shapes of tooth 25, a combination example thereof, and a formation example of a dentition curve in a cutting tooth 24 having the same left-right width (length). The curvatures of the arches of the dentition curves L, La, and Lb are shown to be common, and the dentition curves indicated by the symbols La and Lb are arcs having the same curvature as the arches indicated by La and Lb in FIG. It means that.

Among them, FIGS. 4A and 4B show the second and third embodiments of the cutting tooth 24 in which the tooth shape of the tooth 25 is constituted only by the large tooth 25a described above. in a second embodiment of a), the dentition curve L formed symmetrically single arcuate arch, the third embodiment of FIG. (B) is divided into symmetrically teeth curve L ₂ In this example, the lowermost point of the dentition is formed at the left and right ends and the center. FIG. 4 (C) shows the cutting teeth of the first embodiment for comparison with FIGS. (A) and (B).

As shown in FIG. 4, in (A), (B), (C), the difference in height between the tooth tip of the tooth 25a protruding to the lowest position and the tooth tip of the tooth 25a or 25b protruding to the highest position. H _{1 to} H ₃ represent the depths of pushing (piercing) into the field scene required from the start of cutting when the sheet 13 is cut with the respective cutting teeth 24 to the end thereof. When the dentition curve L in FIG. 4A is a single arc (arch), the height difference H ₁ is the largest, and then the height difference H ₂ shown in FIG. The height difference H ₃ shown in C) is reduced in order, and the height differences H _{1 to} H ₃ correspond to the magnitude of the insertion resistance to the seat 13 and the field under the same conditions. Whether to select is determined according to the hardness of the field, the size of the unevenness and other conditions.
In any case, the dentition curve does not have to be strictly a curve, and may be a combination of a plurality of straight lines.

1 traveling body 9 planting work machine 13 sheet 24 cutter 24 cutting teeth 25 teeth 25a large teeth 25b teeth L, La, Lb dentition curve H _{1, H} 2, _{H 3} push (piercing) depth GL sheet upper surface

Claims (4)

  A planting work machine (9) is connected to the rear of the traveling machine body (1), and the roll-like work machine is extended to the planting work machine (9) as the traveling machine body (1) is planted. In the multi-planter cutter provided with a sheet (13) and a cutter (21) having a cutting tooth (24) formed in a horizontal sawtooth shape for cutting the sheet (13) at a coating end position, (24) A cutter for a multi-grafting machine in which tooth tips on both the left and right sides are sequentially displaced to a higher position toward the center side of the traveling machine body (1).   The multi-grafting machine cutter according to claim 1, wherein the curve representing the displacement of the tooth tip forms a plurality of arches within the left and right length of the cutting tooth (24).   The tooth (25) of the cutting tooth (24) is composed of a large tooth (25a) having a relatively high tooth height and a small tooth (25b) having a low tooth height, and the large tooth (25a) and the small tooth (25b) are formed. The cutter for a multi transplanter according to claim 1 or 2, wherein the cutters are alternately provided and curves representing the displacement of the tips of the large teeth (25a) and small teeth (25b) are formed in an arch shape, respectively.   The cutter for a multi transplanter according to claim 3, wherein the tooth tip of the largest tooth (25a) at the highest position in the cut tooth (24) is formed at a position lower than the tooth tip of the lower tooth (25b).

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