JPH11196682A - Cutting blade for cutter in mulch transplanter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cutting blade for a cutter capable of easily cutting a sheet by pushing the cutting blade to the sheet and bringing the cutting blade into contact with the sheet with a comparatively small force at comparatively short stroke. SOLUTION: This saw-toothed pattern cutting blade 28 installed in a cutter 23 for cutting a roll-like sheet 17 taken out according to the traveling of a machine body and covering the surface of a field at the cover-finishing position, laterally formed over the whole width of the sheet 17, and cutting the sheet 17 by being pushed to and brought into contact with the sheet 17 side is formed out of the blades having different blade heights.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutting blade for a cutter of a multi-transplanter for cutting a sheet covering a field scene.

[0002]

2. Description of the Related Art Conventionally, a planting work machine connected to the rear of a traveling body is provided with a roll-shaped sheet which is fed out as the body travels and covers a field scene, and a cutter which cuts the sheet at a covering end position. A multi-transplanter provided with a cutter is generally known. The cutter is generally provided laterally over the entire width of the sheet, and cuts the sheet by being pressed against the sheet side. A cutting blade is provided.

[0003]

However, the cutting blade has a relatively high tooth height a, and it is necessary to make the cutting blade relatively deep (approximately a) to cut the sheet into the field. Depending on the condition of the field, The cutting blade does not easily get into the field,
There is a disadvantage that cutting may be difficult. Further, as shown in FIG. 11, by making the included angle A of the blades and the pitch B between the blades smaller than the included angle A 'of the cutting blades and the pitch B' between the blades shown in FIG. The tooth height b can be reduced (a> b) and the length of the sheet cut into the field can be made relatively short, but the pitch between the blades is short, so the number of blades increases, and the sheet is cut. There is a drawback that the portion that comes into contact with the sheet at the start is increased, and a relatively large force is required for cutting.

[0004] Incidentally, as a conventionally known one, a = 45 mm,
A ′ = 50 °, B ′ = 42.4 mm, b = 20 mm, A
= 45 ° and B = 17 mm are known.

[0005]

A cutting blade for a cutter of a multi-transplanter according to the present invention for solving the above-mentioned problems is provided by connecting a planting work machine 8 to the rear of a traveling machine body 1. On the 8th side, a roll-shaped sheet 17 that is fed out with the machine running and covers the field scene, and a cutter 23 that cuts the sheet 17 at the covering end position are provided, and the cutter 23 is provided horizontally across the entire width of the sheet 17. In a multi-transplanter provided with a sawtooth-shaped cutting blade 28 that cuts the sheet 17 by being pressed against the sheet 17 side, the cutting blade 28 is formed by blades having different tooth heights. Features.

A second feature is that the cutting blade 28 is configured by arranging a low blade 28b having a low tooth height between a high blade 28a having a high tooth height.

[0007]

FIG. 1 is a side view of a multi-transplanter (rice transplanter), in which a driver's seat 6 is mounted on a body frame 4 of a traveling body 1 supported by front and rear wheels 2 and 3. A planting machine 8 is attached to the rear of the traveling machine body 1 via a lifting link 7 so as to be able to move up and down and roll freely. At this time, a seedling mounting table 9 whose upper end is inclined forward is inclined at the planting work machine 8, and a mat seedling at the lower rear lower end of the seedling mounting table 9 is mounted on a planter case 12 constituting a working machine frame. A well-known planting portion 11 is provided for sequentially scraping and transplanting as the traveling body 1 travels.

On the other hand, on the bottom surface of the planting work machine 8, following the field scene during the running of the machine body, the rolling contact is performed and the swing of the lifting link 7 is controlled by sensing the contact pressure or the height. A sensor roller 14 composed of two long rollers before and after the roller 8 is supported at a predetermined height is horizontally supported by an equalizer arm 16, and a front upper position of the sensor roller 14 is made of recycled corrugated paper or the like. A cylindrical sheet case 18 for rotatably supporting a sheet 17 wound in a roller shape made of a paper sheet in the left-right direction is mounted as a work machine frame.

In the multi-transplanter having the above structure, the planting work machine 8 is lowered onto a field scene so as to be supported at a predetermined height, and the rolled sheet 1 is moved while the traveling machine 1 is running.
7 is sequentially pulled out rearward, the seedlings are scraped from the mat seedlings by the planting unit 11 while covering the field scene, planted from above the coated sheet 17, and transplanted (multi-transplanted) to the field. Has become.

At this time, the driver's seat 6 of the seat case 18
As shown in FIG. 2, a see-through window 19 through which the inside of the seat case 18 can be seen is provided on the front side opposite to the front side, and inserted into the seat case 18 as shown in FIG. The remaining amount of the seat 17 that has been
It is configured such that an operator who sits on the window can easily check through the see-through window 19.

The seat case 18 and the sensor roller 1
4, a sensor arm 21 for detecting a sheet running out (sheet 17 running out) and operating a sensor (switch) for detecting the presence or absence of the sheet 17 (not shown),
The other end (upper end) side is rotatably supported and swingably provided so that the one end (lower end) side comes into contact with the sheet 17 in a biased manner to maintain a predetermined swing angle. At this time, the sensor arm 21 is curved so as to protrude outward.

When the sheet 17 is extended as shown in FIG. 4A, the sensor arm 21 (lower end) comes into contact with the sheet 17 so as to urge it. , The swing angle is held and the presence of the sheet 17 is detected, and when the sheet 17 is exhausted, the sheet 17 is swung to the seat case 18 side, and the difference between the swing angle when the sheet 17 is present and the sheet 17 is determined. Detect cuts.

At this time, since the sensor arm 21 is curved so as to protrude outward, if the seat 17 sags more than necessary, as shown in FIG.
7, swings toward the seat case 18 and follows the seat case 18 so as to stretch the seat 17.
In the case where there is, the slack of the sheet 17 can be detected from the difference from the swing angle in FIG. 4A.

On the other hand, at the rear position of the planting work machine 8, the sheet 17 is supported by the rear end of a cutter arm 22 which is pivotally supported by a side of the planting work machine 8 via a fulcrum shaft 29. An operating wire 2 that is towed by a swing operation of a cutter operating lever 24 that is swingably provided on the side of the driver's seat 6 is provided with a cutter 23 for cutting.
The sheet 17 is cut at the coating end position by the vertical movement of the rear end of the cutter arm 22 via 6.

That is, as shown in FIGS. 5 (a) and 5 (b), the cutter 23 is supported by the cutter arm 22 and a frame rod 27 is provided laterally. The cutter arm 22 is provided so as to protrude and includes a saw-tooth-shaped cutting blade 28 and the like, which will be described later, which is laterally provided over the entire width of the sheet 17.
The lever 24 and the cutter arm 22 are connected via a wire 26 so that the rear end of the cutter 2 is lowered when the lever 24 is pivoted upward, and is raised when the lever 24 is pivoted downward.
When the lever 3 swings upward, the cutting blade 28 is pressed against the sheet 17 and is inserted into the field at a predetermined depth d to cut the sheet 17.

On the other hand, as shown in FIG. 6, the cutting blade 28 is provided with a plurality of high blades 28a having a relatively long (high) height t at the lower end thereof. Low blade 28b with relatively short (low) tooth height T between high blades 28a
Are arranged in a saw-tooth shape composed of two types of blades 28a and 28b having different tooth heights (t> T), and FIG.
(B) As shown in FIG.
(In the case of this embodiment, t =
35 mm, T = 15 mm). With the above structure, the cutting blade 28
The strength has also been improved.

When the cutter 23 is lowered by the lever 24, as shown in FIG.
8a is pressed into the sheet 17 and bites into it, and then FIG.
, The difference T in the tooth height between the high blade 28a and the low blade 28b
With a delay of −t = Δt (20 mm in the present embodiment), the low blade 28 b is pushed into the sheet 17 and bites into it, and thereafter the high blade 28 b
6a and the low blade 28b simultaneously enter the sheet 17, and FIG.
As shown in (c), the sheet 17 is cut (d ≒ t) when the high blade 28a substantially enters the field by the tooth height t.

At this time, the center angle α of the high blade 28a and the low blade 28b is relatively small (smaller than the cutting blade shown in FIG. 10, and in the present embodiment, α is approximately 45 °). The structure is such that the sheet 17 and the field are easily inserted into the field, the pitch p between the blades is relatively small (compared to the cutting blade shown in FIG. 10), and the number of blades is large. The amount (the tooth height t of the high blade 28a) that is squeezed into the field side during cutting is configured to be smaller, and the swing stroke of the lever 24 is shortened, and the sheet 1
7 can be cut more easily.

Although the cutting blade 28 of this embodiment has a relatively large number of blades as described above, only the high blade 28a enters the sheet 17 side at the start of cutting the sheet 17 as described above. At the time of starting cutting, the amount of contact (penetration) with the sheet 17 does not become unnecessarily large, and the pitch at the time of starting cutting into the field side is 2p between the high blades 28a. , The sheet 17 can be cut with a relatively small force.

In particular, since the low blade 28b is disposed between the high blades 28a, as described above, the interval between the portions of the sheet 17 cut by the high blade 28a lags behind the cutting by the high blade 28a. Is cut by the lower blade 28b
At the time when the sheet 17 gets into the sheet 17 side, the high blades 28a
The lower blade 28b is more easily inserted into the sheet 17 and cuts the sheet more easily.

On the other hand, FIG.
When the planting machine 8 is detached from the traveling machine 1 and stored alone as shown in FIG.
In the case where the plant is lowered and supported on the ground in a state where it is connected to the plant, a stand 36 projecting below the planting machine 8 and supporting the planting machine 8 is provided so as to protrude to the left and right of the seedling mounting table 9. Have been.

At this time, the stand 36 is formed of a pipe material, and as shown in FIGS. 7 (a) and 7 (b), the storage posture A which does not project below the planting machine 8 and the planting machine 8 Is supported by being inserted into a pipe 38 fixed to the side of the planting machine 8 (frame 37) so as to be rotatable and switchable to an operating posture B protruding below the planting machine 8 to support the planting machine 8. A holder 39 having a U-shaped cross section is fixed to the outer surface of the frame 37, and a ring that rotates integrally with the stand 36 is provided on the outer side of the frame 37 on the rotation base end side of the stand 36. 41 is provided so as to be fitted outside.

Further, a rod 42 for positioning, which is substantially L-shaped in side view, is slidably held in the holder 39 in the radial direction of the ring 41. The rod 42 is externally fitted to the rod 42 in the holder 39. The spring 43 is biased toward the ring 41 side.
The peripheral surface of the ring 41 and the distal end of the rod 42 are opposed to each other, and the insertion of the rod 42 into the portion of the peripheral surface of the ring 41 facing the distal end of the rod 42 in the storage posture A and the operation posture B of the stand 36 is performed. A possible insertion hole 44 is drilled.

By rotating the stand 36 and inserting the rod 42 into one of the insertion holes 44, the stand 36 is in the storage position A as shown in FIG.
Alternatively, when the posture of the stand 36 is switched, the rod 42 is pulled out of the ring 41 against the urging force of the spring 43 when the posture of the stand 36 is switched, and the stand 36 is rotated. When the posture is switched, the rod 41 and the insertion hole 44 are opposed to each other, and the rod 41 is automatically inserted into the insertion hole 44 by the urging force and the stand 36
Is maintained.

In particular, the stand 36 is moved from the storage position A to the operation position B, which covers the side and the like of the apron 46 supporting the mat seedling provided at the lower end of the seedling mounting table 9 and provided on the seedling mounting table 9 side. When switching, the rod 42
When the stand 36 is removed from the position 1, the stand 36 is automatically rotated by its own weight, and when the operating posture B is reached, the rod 42 is automatically inserted into the insertion hole 44, and the stand 36 is held in the operating posture B, At this point, the posture is switched.

As shown in FIG. 8, a side window 48 through which the inside of the seat case 18 can be seen may be provided on the side surface of the seat case 18, and in this case, the remaining of the seat 17 inside the seat case 18 may be provided. The amount can be easily confirmed from the side, and the decrease in the remaining amount of the sheet 17 can be easily visually recognized as shown in FIG.

[0027]

According to the structure of the present invention configured as described above, the cutting blade is formed in a sawtooth shape with blades having different tooth heights, so that when cutting a sheet, the sheet is sequentially cut from the blade having the higher tooth height. For cutting, it is possible to reduce the amount of the cutting blade that gets into the sheet side at the start of cutting the sheet,
The sheet can be easily cut by pressing the cutting blade against the sheet with a relatively small force.

In particular, by arranging the low blade having a low tooth height between the high blade having a high tooth height, the sheet is cut by the low blade at a portion between the portions cut by the high blade after the cutting by the high blade. , The cutting is made easier.

[Brief description of the drawings]

FIG. 1 is a side view of a multi-implanter.

FIG. 2 is a front perspective view of a seat case.

FIG. 3 is a side sectional view of a seat case portion.

FIGS. 4A and 4B are schematic views showing the operation of a sensor arm when a sheet is present and when the sheet is sagged.

FIGS. 5A and 5B are a main part plan view and a main part side view showing a connected state of the cutter.

FIG. 6 is a front view of the cutting blade, wherein (a), (b),
(C) shows the cutting state of the sheet.

FIGS. 7A and 7B are a side view and a plan view of a stand portion.

FIG. 8 is a side view of the multi-transplanter provided with a side window in a seat case.

FIG. 9 is a side view of the multi-transplanter in which a side window is provided in a seat case showing a state where the rest of the seat is reduced.

FIG. 10 is a front view of a conventionally known cutting blade.

FIG. 11 is a front view of another example of a conventionally known cutting blade.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Traveling body 8 Planting work machine 17 Sheet 23 Cutter 28 Cutting blade 28a High blade 28b Low blade

Claims (2)

[Claims] A planting work machine (8) is connected to the rear of the traveling machine body (1), and is rolled out to the planting work machine (8) side along with the machine body running and covering a field scene. A sheet (17) and a cutter (23) for cutting the sheet (17) at the coating end position are provided, and the cutter (23) is laid laterally over the entire width of the sheet (17).
7) In a multi-transplanter provided with a saw-tooth-shaped cutting blade (28) for cutting the sheet (17) by being pressed against the side, the cutting blade (28) is formed by blades having different tooth heights. Cutting blade for cutter of transplanter. 2. A cutting blade (28) having a high tooth height (28).
The cutting blade for a cutter of a multi-implanter according to claim 1, wherein a low blade (28b) having a low tooth height is arranged between a).