JPH0739231A - Grass divider of rush reaper - Google Patents

Abstract

PURPOSE:To provide a glass divider provide a capable of dividing rushes without a fear of damage, etc., by driving a specified grass-dividing unit having plural vent holes made and distributed therein to rotate around the center of itself and of separating the rushes from the convex-curved surfaces of the dividing unit by shaking wind sent through the vent holes and excellent in work efficiency of grass dividing. CONSTITUTION:In this grass divider, a hollow shaft 30 constitutes the center (O) of rotation of a rotational grass-dividing unit 29 and a pair of curved wing pieces 31 each having a circular-arc shape and exhibiting an about 180 deg. symmetry of rotation are monolithically stretched from the circumferential surface so that the crossection of the grass-dividing unit 29 may have an almost thin S or Z shape. Plural vent holes are made and distributed in the neighborhood of the middle part of the hollow shaft 30. When the grass-dividing unit 29 is driven to rotate around the center (O) of itself, the convex-curved surface 31a of each wing piece 31 performs a dividing action as a function of a rush-dividing cam surface. The rushes are separated from the convex-curved surface 31a by shaking wind introduced through the vent holes to the convex-curved surface 31a and amplified.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to improvement of a weeding device in a rush harvester.

[0002]

2. Description of the Related Art A weeding device for a rush harvester equipped with a rotating weeding body which is considered to be most similar to the present invention is disclosed in Japanese Patent Laid-Open No. Hei 3 (1999) -311.
-39007, 3-65116 and 3-65
No. 117 is known.

In any of these known inventions, the rotary grass body (21) has an elliptical cross section having a large width (L1) and a small width (L2), or a pair of small diameter pipe members (21a) (in parallel). 21b) is shaped into a spectacle section, and when driven to rotate about its own axis (Z), the dimensional difference between the large width (L1) and the small width (L2) is used as the cam lift amount. Are to be distributed.

[0004]

However, the rotating grass body (21) of the above-mentioned known invention has the advantage of not being restricted by the direction of rotation thereof, but it still has the following problems.

In other words, since the rotary grass body (21) has an elliptical or eyeglass-shaped cross-section, it is difficult to secure a large cam lift amount for the grass distribution based on the above-mentioned dimensional difference. ) Is not rotated at a high speed, it is impossible to sort out the grass that is intertwined in a high density,
Due to the high speed rotation, the stem culm of the grass may be scratched or the grass may be torn off.

In order to secure a large amount of cam lift, the radius of curvature of the arcuate surface must be reduced or the overall size must be increased. , Rotating subdivision bodies (21) are likely to interfere with each other, and are subject to certain restrictions due to the dimensional relationship between adjacent stalks of comrades of Igusa plant, which makes implementation difficult.

Furthermore, since the cross-sectional shape of the rotating grass body (21) is an endless or hollow closed type with no open part, the wind force associated with the rotation is still weak and the contact surface pressure with the grass is also low. As a result, the grass will tend to adhere to the oval-shaped flats and the eyeglass-shaped boundary recesses even if the grass is exposed to rain or dew, even when working in environments. As a result, the culm of the grass will be scratched. In particular, foreign matter such as sap and dust of grass are likely to adhere and accumulate on the flat portion and the concave portion.

In the sense that it is difficult for the grass to be effectively released from the surface of the rotating submerged body (21), it is necessary to rotate the grass at a high speed as described above, and a scraper (29) for preventing winding is additionally provided. ) (31) must also be equipped.

[0009]

DISCLOSURE OF THE INVENTION The present invention intends to improve such problems, and because of its structure, the grass frame from the middle of the grass frame protruding forward along the ground to the grass While raising the raising device in a rearwardly inclined installation state, also raising the rotating grass grass body from the front end of the grass frame in a rearwardly inclined installation state at a gentler angle than the raising device. , In the Igusa harvester that gives the rotational driving force of the engine to the rotating grass from above,

First, the rotation center of the rotating grass is used as a hollow shaft, and a pair of arcuate curved wing pieces having a rotational symmetry of about 180 degrees are integrally projected from the circumferential surface of the hollow shaft to integrally rotate the rotary shaft. The cross-sectional shape of the grass body is an elongated S-shape or Z-shape that is inscribed in a virtual rectangle consisting of long sides that are wider than the adjacent stems of the two grass plants and short sides that are narrower than the long sides. Along with shaping, when a plurality of air holes are distributed on the circumferential surface of the hollow shaft, and the rotary branching body is driven to rotate about its own center, the convex curved surfaces of both arc curved winglets At the same time as allocating the grass as the distribution cam surface, the centrifugal force positively attracts the fan wind from the ventilation hole of the hollow shaft to the convex curved surface of the arc curved wing piece, and the wind force causes The feature is that it is decided to release the grass.

Secondly, a pair of arcuate curved wing pieces having a rotational symmetry of about 180 degrees are combined and integrated so that the hollow chamber is defined at the center of rotation of the rotary grass body.
The cross-sectional shape of the rotating subdivided body is an elongated substantially S-shape or Z that is inscribed in a virtual rectangle composed of long sides wider than the adjacent stems of two grass plants and short sides narrower than the long sides. In addition to being shaped like a letter V, when a plurality of ventilation holes were distributed in the wall surface of the hollow chamber, and the rotary grass was driven to rotate about its own center, the convex curved surfaces of both arc-shaped curved winglets were formed. At the same time as the grass distribution cam surface, the grass is distributed, and at the same time, the centrifugal force is used to positively attract the fan wind from the ventilation hole of the hollow chamber to the convex curved surface of the arc curved winglet, and the wind force causes the convex curved surface. It is characterized by the fact that it has been decided to release the grass.

[0012]

In any of the above-mentioned first and second inventions, the cross-sectional shape of the rotating subdivided body is wider than the adjacent stalks of the two grass plants, and the shorter side is narrower than the long side. As a slender, substantially S-shaped or Z-shaped inscribed in a virtual rectangle consisting of and, since it is equipped with a pair of arc-shaped curved winglets that are rotationally symmetrical about 180 degrees with respect to its center of rotation, it rotates based on its short sides. Between the adjacent stems of the grass plant comrades that plant the grass bodies from the field,
It is possible to enter it reliably and smoothly.

Then, when the rotary grass is rotated by the driving force from the engine, the convex curved surface of the arcuate curved wing piece serves as a cam surface for distributing the grass and the dimensional difference between the long side and the short side. As a constant cam lift amount, the grass will be pushed and distributed, and the entanglement of the grass can be released.

In addition, a plurality of vent holes are distributed in the hollow shaft or the hollow chamber which is the center of rotation of the rotary grass, and during the rotational movement, centrifugal force causes the arc curved wing pieces to move from the vent holes. Since the fan wind is actively attracted to the convex curved surface and the wind force separates the grass from the cam surface of the rotating grass, it also works in combination with the distribution function of the convex curved surface. As a result, it is possible to quickly and completely disengage the rush that has been intertwined in a high density up to the tip of the rush, and to reliably prevent the rush from winding and scratching.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the present invention will be described below with reference to the illustrated embodiments. FIGS. 1 and 2 show a general outline of a two-row mowing grass harvester, and (10) is a general term for the machine body. It comprises a fixed track frame (11) and a vertically operable working frame (12) forming the front part thereof.

That is, the work frame (12) includes a grass weeding device (A), a raising device (B), a tip-side holding and conveying device (C), a stock harvesting device (D), and a scrape As a frame for supporting a series of working devices including a curling device (E), a converging / conveying device (F) on the stock side, and a stock binding device (G), its rear end is located on either side of the track frame (11). It is pivotally connected to both end parts through horizontal horizontal shafts (13), and while the horizontal shafts (13) are used as pivotal fulcrums, an upward and downward tilted state is caused by the operation of the lifting hydraulic cylinder (14). It is being promoted to.

(15) is the track frame (11)
An engine fixedly installed on the upper side, and (16) a traveling transmission which is also mounted on the track frame (11), and which has an intermediate shaft (1) parallel to the horizontal shaft (13).
7) and the transmission belt (18), the engine (1
It is transmission-coupled with the output shaft (19) of 5).

Further, (20) is a pair of left and right traveling crawlers which are rotationally driven by the power taken out from the transmission (16), and (21) is the engine (1).
5) also includes a grass binding bed that entirely covers the upper surface of the truck frame (11), and (22) follows the binding bed (21), followed by the transmission (16) and the intermediate shaft (1).
(7) and the like, a grass stack loading deck (23) covering the upper surface, and an operator cab (23) extended and supported further rearward from the loading deck (22).

Reference numeral (24) is a work power distribution transmission for distributing the work power from the engine (15) to the series of work devices (A) to (G) mentioned above, and the intermediate shaft ( Work power input from 17) to the transmission (24) via another transmission belt (25)
From the transmission (24) to the tip side nipping / conveying device (C), the grass grabbing device (B) and the weeding device (A) above, and the lateral scraping device (E), To the stock-source-side focusing and conveying device (F) and stock-source binding device (G),
Further, they are transmitted to the stock harvesting device (D) below.

Then, the grass weeding device (A) is erected at a certain angle in a rearwardly inclined state while being biased to the foremost end position on the side (uncut side) of the work frame (12). , Grow quickly from the adjacent stalks of adjacent rush plants planted from the field to release the entanglement of the rush.

Further, the grass-raising device (B) is located immediately after the weeding device (A) and is erected at a steeper rearward inclination than the weeding device (A). After the weeding, the leaves are neatly raised while combing the grass. The nipping and conveying device (C) on the tip side is installed so as to face the midway height position of the raising device (B) immediately after that, while receiving and nipping the tip side of the raised rush, Although it is transported to the rear of the machine body (10), the root of the grass is cut by the reaping device (D) at the beginning when it is clamped.

The scraping-out device (E) for removing the scraps (A) is laid across the front surface of the work frame (12), and the stocker side of the grass that is being conveyed backward while being pinched by the tip side By swinging out and transporting in the lateral direction of the machine body (10) while hooking, the scrap a is thrown out and dropped in the process, and the grass is turned to the overall sideways posture.

Then, the stock side of the grass that has been turned to the sideways posture is continuously received by the focusing and conveying device (F) on the weeds binding bed (21), and the focusing and conveying device (F) Introduced to the binding device (G) located at the rear,
It is bound by the binding device (G). That is, the planter-side focusing and conveying device (F) and the bundling device (G) of the grass are used as the weeding device (A) and the raising device (B) in the work frame (12), and the nipping and conveying device on the tip side. Opposite side of the device (C) and the cutting device (D) (already cut side)
It is arranged so as to face the rush binding bed (21) while being biased to.

At the time of bundling, the tip side of the rush is released from the sandwiched state by the sandwiching and conveying device (C),
As a grass bundle, the stacking deck (2
2), and the loaded state on the deck (22) is maintained.

Next, the weaving device (A) of the present invention will be described in detail. In the illustrated embodiment, this is for a two-row mowing grass harvester and is integrated from the lower end of the working frame (12). It is equipped with a total of three parallel weeding frames (26) that crawl forward along the ground, of which the outer (uncut side) weeding frame (26) and the inner weeding frame (26).
From the middle part, a pair of juxtaposed pull-up case cases (27) forming the above-mentioned pulling-up device (B) are erected in a steeply-angled rear-up inclined installation state.

(28) is the remaining intermediate grass frame (26)
And the above-mentioned outer weeding frame (26) is a weeding arrow (divider) that is integrally erected from the front end of the outer weeding frame, and this weeding arrow (28) moves from the farm field as the aircraft (10) advances. It will quickly break into the adjacent stems (between left and right) of the planting plants of the grass plant.

(29) is the outer grass frame (26)
And a pair of parallel rotating grass bodies corresponding to the intermediate grass frame (26), but since the pair of parallel parallel grass bodies are the same as each other, it will be explained based on FIGS. It is inscribed in a virtual rectangle with a long side (y) wider than the adjacent stems of the rush plants of the grass plant that are planted from the field and a short side (x) narrower than the long side (y). It has a long and narrow S-shaped or Z-shaped cross-section, and its short side (x) divides it into adjacent stalks of two rush plants, and the dimensional difference between this and the long side (y). Is set as a constant cam lift amount (L), and the distribution action can be performed to separate the entanglement of the grass.

In other words, the rotary grass body (29) has its center of rotation (O) formed as a hollow shaft (30), and has an arcuate curved wing piece that is rotationally symmetrical about 180 degrees with respect to the center of rotation (O). The pair of (31) is the hollow shaft (3
0), which is integrally projected from FIG.
By being driven to rotate in the direction indicated by the arrow (f), the convex curved surfaces (31a) of both of the arcuate curved wing pieces (31) are determined to function as a cam surface for distributing grass. (31b) is a concave curved surface forming the back surface of the convex curved surface (31a).

In addition, a plurality of ventilation holes (32) are concentrated and distributed in the circumferential surface of the hollow shaft (30), especially near the upper and lower end portions and in the middle portion (at the midway height position). . Then, when the rotary grass body (29) is rotationally driven, its rotational centrifugal force positively attracts the fan wind from the ventilation hole (32) to the convex curved surface (31a) of the arcuate curved blade piece (31). Then, due to the wind force, an arc curved winglet (3
The grass is released from the convex curved surface (31a) of 1) to prevent the surface of the rotating grass (29) from being wound or scratched.

Furthermore, during the rotational movement of the rotating grass body (29), as suggested by the arrow (p) in FIG. ) The hollow shaft (30) forming the above-mentioned concave curved surface (31b), which is guided toward the convex curved surface (31a) of the arcuate curved winglet (31), resulting in negative pressure as a result. On the circumferential surface of the hollow shaft (30), the hollow shaft (3
Air is sucked out from the inside of (0) through the ventilation hole (32) and is attracted, and it is circulated and regenerated as an agitating wind toward the convex curved surface (31a) again. From the convex curved surface (31a) functioning as a cam surface, the grass is considered to be released without fail and soft weeds and other foreign matter are not attached. It is preferable that the air to be sucked and drawn is introduced into the hollow shaft (30) from the upper ends of the hollow shaft (30) which are open at both ends.

The lower end of the rotary grass body (29) is in a tapered shape while maintaining its S-shaped or Z-shaped cross-sectional shape, and is from the front end of the grass frame (26) or its position. It is supported by the standing upside down arrow (28) as follows.

That is, as apparent from FIG. 3, the lower support shaft (33) is integrally extended from the lower end of the hollow shaft (30). Reference numeral (34) is a bearing rotatably supporting the lower support shaft (33), and reference numeral (35) is a bearing case for the support stay (36) which stands upright from the front end of the weeding frame (26). ) Is fixed and received. Then, the lower end supporting portion of such a rotating grass body (29) is in a state of being wrapped and enveloped by the grass arrow (28) attached to the front end portion of the grass frame (26). However, as suggested by the figure, the support stay (36) is continuously and integrally erected from the auxiliary weeding frame (26a), and the auxiliary weeding frame (26a) of the auxiliary weeding frame (26a) is Multiple bolts (3
It may be fixed and integrated by 7).

On the other hand, the upper end of the hollow shaft (30) is transmission-coupled to the input shaft (39) which receives the rotational power from the engine (15) through the universal joint (38). From the upper side of the rotary grass body (29), which is erected in the inclined rearward installation state as described above, the engine (1
By receiving the rotational driving force of 5), the rotational movement is performed around the center (O) of itself in the direction of the arrow (f).

Reference numeral (40) is a bearing that rotatably supports the input shaft (39), and (41) is a bearing case thereof, which is provided on the front surface of the raising chain case (27) forming the raising device (B). It is stably supported by the bracket (42).

First, the hollow shaft (30) is made of a metal pipe material, and both arc-shaped curved blades (31) are welded to the circumferential surface of the metal pipe material, so that an overall substantially S-shaped or Z-shaped cross section is formed. Although the rotating sward body (29) shaped in the shape is shown, as is clear from the first modified embodiment of FIGS. 6 and 7, the pair of arcuate curved winglets (31) are used as separate and independent C-shaped members. Hollow shaft (3
0) multiple through bolts (43) and their fixing nuts (4)
According to 4), they may be combined and integrated into a generally S-shaped or Z-shaped cross-sectional shape.

In this case, when the lower end of the hollow shaft (30) is rotatably supported by the support stay (36), the lower support shaft (34) is supported by the support stay (36) as shown in FIG. ) Is integrally planted upward, while the bearing case (35) is integrally projected downward from the hollow shaft (30), and the bearing (34) is inserted and installed on the fitting surface. is there.

Furthermore, the second modified embodiment of FIGS. 8 and 9 and FIG.
As suggested by the third modified embodiment of Nos. 12 to 12, a pair of arcuate curved blades (31) are formed as separate and substantially J-shaped cross-section members, and are combined and integrated in a relational state of about 180 degrees rotational symmetry. By doing so, the hollow chamber (s) instead of the hollow shaft (30) may be partitioned and formed. It is also possible to integrally extrude the rotating grass body (29) from a light metal or a synthetic resin so as to have a sectional shape as shown in FIGS.

An upper support shaft (45), which is transmission-coupled to the input shaft (39), is fixed to the upper end of the hollow chamber (s) which forms the center of rotation (O) of the rotary grass body (29). On the other hand, a lower support shaft (33) integrally standing upright from the support stay (37) is formed at the lower end of the hollow chamber (s) while being integrated.
The bearing case (35) fitted through the bearing (34) is integrally connected.

The other constructions of the first to third modified embodiments are substantially the same as those of the basic embodiment of FIGS. 3 to 5, so that the reference numerals corresponding to those of FIGS. However, the detailed description thereof will be omitted.
As is clear from the fourth to sixth modified examples of Nos. 15 to 15, the convex curved surfaces (31a) of the arcuate curved winglets (31) of the rotating grass body (29) have a non-adhesive and self-lubricating polymer. It is preferable that the polyethylene or other synthetic resin film (46) is adhered and integrated by its application, spraying, dipping, sticking, heat shrinkage, or other means.

The convex curved surface (3) of the arcuate curved winglet (31) which covers and is the cam surface for the grass distribution of the rotating grass (29) is formed.
In 1a), the sap of rush will cause dust and other foreign matter to adhere, resulting in loss of smoothness of the surface. As a result, rush will tend to wind up and rush will be easily damaged. This is because the synthetic resin film (46) can surely prevent it. The purpose of the same purpose is that the above-mentioned vent holes (3
It can be said to be remarkably effective because it is also achieved by the induction wind generated through 2).

In the illustrated embodiment, the present invention applied to a two-row mowing grass harvester is described, and the pair of rotating grass bodies (29) are both in the direction of the arrow (f). It is needless to say that the present invention can be applied to a single-row mowing grass harvester and a three-row or more-row multiple-row mowing grass harvester, although they are driven to rotate synchronously.

According to the above-mentioned constitution of the present invention, the cross sectional shape of the rotating subdivided body (29) is wider than the long side (y) between the adjacent stems of the two grass plants and the longer side (y). As an elongated S-shaped or Z-shaped inscribed in a virtual rectangle consisting of narrow short sides (x), the rotation center (O) is about 1
Since it has a pair of arcuate curved winglets (31) that are rotationally symmetrical with respect to 80 degrees, the short side (x) of the rotating grass body (29).
Based on this, as shown in FIG. 16 (a), this can be smoothly and surely made to enter between the adjacent stems of the grass plant comrades to be planted from the field.

Then, when the rotational driving force of the engine (15) is applied to the rotary grass body (29) to rotate it in the direction of the arrow (f), the convex curved surface (31a) of the arcuate curved winglet (31). ) Is a cam surface for grazing, and the dimensional difference between the long side (y) and the short side (x) is the cam lift amount (L).
As a result, the rushes are distributed so as to be pushed open as shown in FIGS. 16B and 16C, and even the rushes that are densely entangled with each other can be reliably released.

Further, during the rotational movement of the rotary submerged body (29) in the direction of the arrow (f), one of the arcuate curved wing pieces (31) acts to push up the stem culm of the grass (a). At the same time, the remaining one acts to push down the stem culms of the above-mentioned rush (a) and the adjacent rush (b), so that the entangled tips of the rush can be released quickly and surely. , Also the rotating submerged body (2
Since 9) makes a rotational movement around its own center (O), there is no risk of losing its rotational locus due to the entanglement separation resistance of the grass.

At this time, the rotating grass body (29) has an elongated S-shaped or Z-shaped cross-section, which is different from the elliptical cross-section or the spectacles of the known invention described at the beginning, and is endless in a hollow closed state. Therefore, the pair of arcuate curved blades (31) in a so-called end-separated state can elastically act like a whip.

Moreover, the hollow shaft (30) forming the center of rotation (O) is caused by the rotating centrifugal force of the rotating grass body (29).
The air attracted from the plurality of air holes (32) distributed in the circumferential surface of the chamber or the partition wall surface of the hollow chamber (s) is positively applied to the convex curved surface (31a) of the arc-shaped curved blade (31) as a fan wind. Since the wind force causes the grass to be released from the convex curved surface (31a), the grass will wind around the convex curved surface (31a), or foreign matter attached to the convex curved surface (31a). It is possible to reliably and quickly sort even densely entangled grasses without the risk of being damaged.

This is especially true for the rotating sward body (2
9) Convex curved surface (31a) of the arcuate curved winglet (31)
However, the addition of the structure in which the synthetic resin film (46) is adhered and integrated will achieve the effect more and more effectively.

[0048]

As described above, according to the present invention, the grass-raising device (B) is moved backward from the midway part of the weeding frame (26) projecting forward of the airframe (10) along the ground. While standing in a tilted state, the same weed frame (2
From the front end of 6), the rotating grass body (29) of the grass is erected in a rearward inclined installation state with a gentler angle than that of the raising device (B), and the rotating grass body (29) is placed from above. In the rush harvester that gives the rotational driving force of the engine (15),

The center of rotation (O) of the rotating subdivision (29)
As a hollow shaft (30), a pair of arcuate curved winglets (31) having a rotational symmetry of about 180 degrees are integrally projected from the circumferential surface to integrally form a cross-sectional shape of the rotating grass body (29). (A) Longer side (y) wider than the distance between adjacent stems of two grass plants
And a slender substantially S-shaped or Z-shaped inscribed in a virtual rectangle consisting of a short side (x) narrower than its long side (y), and the circumference of the hollow shaft (30). When a plurality of vent holes (32) are distributed on the surface and the rotary grass body (29) is driven to rotate around its own center (O), the convex curved surfaces (31a) of both arc-shaped curved winglets (31) are ) As the cam surface for distributing the grass, and at the same time the grass is distributed, the ventilation hole (3) of the hollow shaft (30) is generated by the rotating centrifugal force.
2) positively attracting a fan wind to the convex curved surface (31a) of the arc-shaped curved winglet (31), and the convex wind (31
Since it is determined that the grass is released from a), there is an effect that the problems of the known invention mentioned at the beginning can be alleviated.

That is, the rotating swarding body (29) of the present invention is not an endless or hollow closed form with no open portion on its circumferential surface, like an elliptical cross section or an eyeglass type, but an elongated elongated S having the open portion. Convex curved surface (31a) that is shaped as a V-shaped or Z-shaped cross-sectional shape and is the cam surface for grass distribution.
A pair of arcuate curved winglets (31) provided with are in an end-to-end separated state, so to speak. Concave curved surface (3) of both arc curved winglets (31)
1b) is open to the outside world.

Therefore, the cam lift amount (L) can be ensured to be as large as possible without the restriction that the rotating grass body (29) is made heavy, and as a result, the entangled images can be obtained without rotating at a high speed. Since the grass can be reliably distributed, there is no risk of scratching or tearing the culm of the grass.

Further, since the rotating grass body (29) of the present invention has a substantially S-shaped or Z-shaped cross section, a pair of arcuate curved blades (31) having rotational symmetry of about 180 degrees are separated. Although it can be said that a fan wind is likely to be generated during the rotational driving as if it were a wind turbine, a plurality of ventilation holes (31) are opened on the circumferential surface of the hollow shaft (30) forming the rotation center (O). It is distributed, and by the centrifugal force of rotation of the rotating grass body (29), the fan wind is actively attracted from the vent hole (32) to the convex curved surface (31a) of the arcuate curved wing piece (31). As a result, due to the increased wind power of the fan wind, it is possible to reliably release the grass and foreign matters from the convex curved surface (31a) of the arc curved wing piece (31) that acts to distribute the grass. The effect of preventing winding and scratches is extremely excellent.

When the hollow chamber (s) is defined instead of the hollow shaft (30) as described in claim 2, such effects can be achieved in exactly the same manner.
At the same time, it is possible to easily manufacture and process the rotating grass (29). Further, if the structure of claim 3 is adopted, the cam lift amount (L) can be easily ensured to be large and the adjustment thereof can be performed.

Further, if the configuration of claim 4 is adopted,
Not only the fan wind generated by the rotary motion of the rotary grass body (29) but also a composite integrated with the convex curved surface (31a) of the arcuate curved wing piece (31) that functions as a grass surface for distributing the grass. The resin film (46) can also prevent foreign matter such as sap, dust, and water droplets from the grass to adhere, so that the effect of preventing the grass from being wound or scratched can be further enhanced. Can be said to be great.

[Brief description of drawings]

FIG. 1 is an overall schematic side view of a rush harvester to which the present invention is applied.

FIG. 2 is a front view of FIG.

FIG. 3 is an enlarged side view of a partially cutaway view showing the weeding device of FIG. 1 extracted.

FIG. 4 is a partially enlarged side view of FIG.

5 is a sectional view taken along line 5-5 of FIG.

FIG. 6 is a side sectional view showing a first modified example corresponding to FIG.

7 is an enlarged cross-sectional view taken along line 7-7 of FIG.

FIG. 8 is an enlarged side view of a partially cutout showing the second modified embodiment.

9 is a sectional view taken along line 9-9 of FIG.

FIG. 10 is an enlarged side view, partly broken away, showing a third modified embodiment corresponding to FIG.

11 is an enlarged cross-sectional view taken along line 11-11 of FIG.

12 is an enlarged sectional view taken along line 12-12 of FIG.

FIG. 13 is a cross-sectional view showing a fourth modified example corresponding to FIG.

FIG. 14 is a sectional view showing a fifth modified example of the same.

FIG. 15 is a sectional view showing a sixth modification.

FIG. 16 is an explanatory view showing a process of action of grass on hay.

[Explanation of symbols]

 (10) · Airframe (15) · Engine (26) · Weeding frame (29) · Rotating weeding body (30) · Hollow shaft (31) · Arc curved wing fragment (31a) · Convex curved surface (31b) · Concave curved surface (32) -Vent hole (43) -Through bolt (44) -Fixing nut (46) -Synthetic resin film (A) -Weeding device (B) -Raising device (O) -Rotation center (s) -Hollow Chamber (x) / short side (y) / long side

Claims (4)

[Claims] 1. A grass grabbing device (B) is erected from a midway part of a weeding frame (26) extending forward along the ground to the front of an airframe (10) in a tilted installation state in which the grass is raised backward. Similarly, from the front end of the sward frame (26), the rotating sward body (29) of the grass is erected in a rearward inclined installation state at a gentler angle than the raising device (B), and the rotation amount is increased from above. In a grass harvester that applies a rotational driving force of an engine (15) to a grass body (29), the rotation center (O) of the rotary grass body (29) is set to a hollow shaft (3).
0), a pair of arcuate curved winglets (31) having a rotational symmetry of about 180 degrees from the circumferential surface is integrally overhanged so that the cross-sectional shape of the rotating grass body (29) is the same as that of the grass plant. Of a long side (y) wider than the adjacent stems and a short side (x) narrower than the long side (y) are inscribed in an elongated rectangular S-shape or Z-shape. When a plurality of air holes (32) are distributed on the circumferential surface of the hollow shaft (30) while molding, and the rotary grass body (29) is rotationally driven around its own center (O), The convex curved surface (3
1a) is used as a cam surface for allocating grass, and at the same time the grass is distributed, the hollow shaft (3
0) The ventilation wind (32) of the arc curved winglet (31) is actively attracted to the convex curved surface (31a) of the curved blade (31), and the wind force is used to release the rush from the convex curved surface (31a). A weeding device for a grass harvester. 2. A grass-raising device (B) is erected from a midway portion of a weeding frame (26) extending forward along the ground to the front of the airframe (10) in a tilted rearward installation state. Similarly, from the front end of the sward frame (26), the rotating sward body (29) of the grass is erected in a rearward inclined installation state at a gentler angle than the raising device (B), and the rotation amount is increased from above. In a grass harvester that applies a rotational driving force of an engine (15) to a grass body (29), a relative state in which a hollow chamber (s) is partitioned at a rotation center (O) of the rotary grass body (29) is about 180 degrees. By combining and integrating a pair of arc-shaped curved winglets (31) having rotational symmetry with each other, the cross-sectional shape of the rotating grass body (29) has a longer side (y ) And a short side (x) narrower than its long side (y). And a plurality of vent holes (32) are distributed in the partition wall of the hollow chamber (s) to form an elongated S-shape or Z-shape that is inscribed in a virtual rectangle. ) Is rotated about its own center (O), its convex curved surface (3)
1a) is used as a cam surface for grazing the grass, and at the same time the grass is distributed, the hollow chamber (s) is rotated by centrifugal force.
From the vent hole (32) of the arc to the convex curved surface (31a) of the curved arc winglet (31), and the wind force causes the grass to be released from the convex curved surface (31a). A weeding device for a weed harvester. 3. A pair of arcuate curved winglets (31) are separately and independently provided to a hollow shaft (30) forming a center of rotation (O) thereof by a plurality of through bolts (43) and fixing nuts (44) thereof. The weeding device for a grass harvester according to claim 1, wherein the weeding device is integrated with one another. 4. A convex curved surface (31) of each of the arcuate curved winglets (31).
3. A grass weeding machine weeding machine according to claim 1 or 2, characterized in that a synthetic resin film (46) having a non-adhesive property and a self-lubricating property for preventing adherence of foreign matter is adhered and integrated into a). apparatus.