JP2016002052A - Work machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a work machine capable of crushing a cavity formed underground in a trencher groove.SOLUTION: The work machine including a rotary plowing unit and a ridge forming tool arranged in the rear of the rotary plowing unit, being installed on a running vehicle, moves along a trencher groove formed in a farm field, plows with the use of the rotary plowing unit and makes a ridge on the trencher groove with the use of the ridge forming tool. The work machine also has a suppression tool for suppressing soil in the trencher groove, at the rear of the rotary plowing unit but in front of the rear side of the ridge forming tool.

Description

  The present invention relates to a working machine for plowing a field along a trencher groove formed in advance in the field and setting a ridge on the trencher groove.

There exists a working machine described in patent document 1 as a working machine.
This working machine has a rotary tiller, and a paddle former and a seeding device disposed behind the rotary tiller.
The working machine is attached to the rear part of the tractor, and plows the rotary field while moving the field along the trencher grooves (grooves dug by the trencher) formed in the field in advance and A ridge is set up on the trencher groove, and at the same time, seeding is carried out with the above-mentioned seeding device directly above the trencher groove of this ridge.

The seeding device sows seeds of root vegetables such as burdock and long potatoes.
In addition, the working machine includes a search guide that is inserted into the trencher groove and guided by the groove wall of the trencher groove so as to be seeded immediately above the trencher groove.
In order to sow directly above the trencher groove, after setting up on the trencher groove by a working machine having a rotary tiller and a culverter and not having a seeding device, the seedling is seeded by the seeding device. In some cases.

Japanese Patent No. 5050004

In the conventional working machine, in a clay-like field (a field where the earth clumps do not easily collapse), the trace that the search guide has passed is likely to remain as a cavity.
In addition, even if a search guide is not provided on the work implement, if the field is clayey, large soil blocks are likely to be formed, and the soil backfilled in the trencher groove may not be tightly packed in the trencher groove. May result in cavities.

If there is a cavity in the soil in the trencher groove, root vegetables will stop growing when they reach the cavity, affecting the growth of the crop.
Then, this invention makes it a subject to provide the working machine which can crush the cavity formed in the soil in a trencher groove | channel in view of the said problem.

The technical means taken by the present invention to solve the technical problems are characterized by the following points.
In the invention which concerns on Claim 1, it has a rotary tiller part and the hail | molding device arrange | positioned at the back of this rotary tiller part, It is mounted | worn with a traveling vehicle and moves along the trencher groove | channel formed in the field. A working machine for plowing on a rotary tiller and setting a plow on a trencher groove with the plow former,
A pressure reducing tool for suppressing the soil in the trencher groove is provided at the rear of the rotary tiller and at the front of the rear of the ridge former.

In the invention which concerns on Claim 2, the said pressure suppression tool is urged | biased below, It is characterized by the above-mentioned.
In the invention which concerns on Claim 3, the said pressure suppression tool is comprised by the skid, It is characterized by the above-mentioned.
The invention according to claim 4 is characterized in that a column made of a plate material that is long in the vertical direction with the plate surface facing in the left-right direction is provided between the rotary tiller and the ridge former, and the skid is provided on this column. To do.

The invention according to claim 5 is characterized in that a search guide inserted into the trencher groove and guided by the groove wall of the trencher groove is provided, and a pressure suppressor is arranged on the rear side of the search guide.
The invention according to claim 6 is characterized in that a pressure suppressor is attached to the search guide.
In the invention which concerns on Claim 7, the pressure suppression tool is provided so that height adjustment is possible, It is characterized by the above-mentioned.

The present invention has the following effects.
According to the first aspect of the present invention, by providing the pressure reducing tool that suppresses the soil (backfill soil) in the trencher groove, the cavity formed in the soil in the trencher groove can be crushed by the pressure reducing tool.
According to the invention which concerns on Claim 2, the pressure suppression of the soil in a trencher groove | channel can be ensured by urging | biasing a pressure suppression tool below.

According to the invention which concerns on Claim 3, this pressure suppressor can be compactly arrange | positioned between a rotary tilling part and the rear part of a ridge forming machine by comprising a pressure suppressor with a skid.
According to the invention which concerns on Claim 4, by providing a pressure suppression tool in the support | pillar which consists of a board | plate material with a board surface facing the left-right direction at the up-down direction, the support | pillar which supports a pressure suppression tool is provided between a rotary tillage part and a paddle shaping machine. It can be arranged compactly.

According to the invention which concerns on Claim 5, the cavity formed in the soil in a trencher groove | channel by a search guide is crushed with a pressure suppressor by arrange | positioning the pressure suppressor in the back side of the search guide inserted in a trencher groove | channel. be able to.
According to the invention which concerns on Claim 6, the member which supports a pressure suppression tool can be abbreviate | omitted by attaching a pressure suppression tool to a search guide.

  According to the invention which concerns on Claim 7, the pressure suppression degree by a pressure suppression tool can be adjusted by providing the pressure suppression tool so that height adjustment is possible.

It is a side view which shows the excavation part and tractor of a trencher, and a working machine. It is a side view of the working machine which concerns on 1st Embodiment. It is a back perspective view of a working machine. It is a back perspective view which shows the attachment part of a search guide and a seeding apparatus. (A) is a rear view which shows the positional relationship of the shape | molded ridge, a trencher groove | channel, and a pressure suppression tool, (b) is a perspective view of a pressure suppression tool. It is a side view of the working machine which concerns on 2nd Embodiment. (A) is a rear view which shows the positional relationship of the shape | molded ridge, a trencher groove | channel, and a suppression tool, (b) is a perspective view of the guide part of a suppression tool and a search guide. It is a side view which shows the modification of attachment of the pressure suppression tool. It is a rear view of the pressure suppressor and transplanting means which concern on 3rd Embodiment. It is a side view which shows the attachment structure of the pressure suppression tool which concerns on 4th Embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 5 show a first embodiment. In FIG. 1, the code | symbol 1 has shown the working machine with which the tractor T illustrated as a traveling vehicle is mounted | worn via mounting mechanisms, such as the three-point link mechanism 21. FIG. This working machine 1 performs tilling, tapping, and sowing in one step, and includes a rotary tilling device 3, a hull forming device 41, and a sowing device 7 (anti-tacking working unit).

  The work machine 1 moves the field F along the trencher groove H by the tractor T that travels across the trencher groove H dug in the field F in advance by the excavator 63 of the trencher, and enters the trencher groove H. While moving along the field F, it is cultivated by the rotary cultivator 3, and a cocoon U is formed on the trencher groove H by the cocoon forming device 41, and the sowing device 7 produces crops (root vegetables such as burdock and long potatoes). Sowing seeds.

As shown in FIG. 2, the rotary tiller 3 includes a rotary machine frame 22 mounted on the rear part of the tractor T by the three-point link mechanism 21, and a rotary tiller unit 9 provided on the rotary machine frame 22; A tilling cover 23 is provided to cover the rotary tilling portion 9. In the present embodiment, the rotary tiller 3 is exemplified by a center drive rotary tiller 3.
The rotary machine frame 22 includes a gear case 24 located at the center in the left-right direction, a transmission case 25 projecting downward from the gear case 24, left and right support arms 26 projecting left and right from the gear case 24, and a gear. It has a top mast 27 protruding upward from the case 24.

The rotary tiller 9 is provided in the lower part of the transmission case 25. The rotary tiller 9 includes a claw shaft 29 that protrudes left and right from the lower portion of the transmission case 25, and a plurality of tilling claws 28 attached on the claw shaft 29.
A driving force from the PTO shaft of the tractor T is input to the transmission mechanism in the gear case 24, and the driving force transmitted to the transmission mechanism in the gear case 24 is transmitted via a transmission mechanism provided in the transmission case 25. Is transmitted to the claw shaft 29, and the claw shaft 29 rotates around the axis in the left-right direction by the driving force. As the claw shaft 29 rotates, the tilling claw 28 plows and reverses the soil and crushes the soil.

The rotary tiller 9 (claw shaft 29 and tiller claw 28) of the present embodiment rotates in the direction of arrow X in FIG. 2, and the tiller claw 28 rotates and cuts downward with respect to the soil for downcut tillage. Moreover, the soil cultivated by the tilling claws 28 is released to the rear.
The tillage cover 23 is an arcuate plate body in a side view covering the upper side of the rotary tiller 9, and can be rotated about the axis of the claw shaft 29 with respect to the rotary machine frame 22 by the attachment means 30. And it is attached to the rotary machine frame 22 so that it can be fixed at an arbitrary rotational position.

The attachment means 30 fastens a pair of left and right fixed brackets 31 fixed to the left and right support arms 26, a pair of left and right movable brackets 32 fixed to the upper surface of the tillage cover 23, and the fixed bracket 31 and the movable bracket 32. And a bolt 33 to be connected.
Each of the left and right movable brackets 32 is formed with a pair of front and rear arc-shaped long holes 34 centered on the axis of the claw shaft 29, and the bolts 33 are passed through the long holes 34 and are formed on the fixed bracket 31. The movable bracket 32 is connected to the fixed bracket 31 by being screwed into the hole.

Then, by loosening the fastening by the bolt 33, the tillage cover 23 can be rotated around the claw shaft 29 together with the movable bracket 32 with respect to the rotary machine frame 22, and by tightening the bolt 33, the tillage cover 23 is It is configured to be fixed to the rotary machine frame 22 at an arbitrary rotational position.
The movable bracket 32 extends rearward, and a support frame 35 is fixed to the extended portion 32a. The support frame 35 and the tilling cover 23 are attached with a ridge forming device 41 for setting up the seedling and a seeding device 7 for seeding the ridge U. By rotating the tillage cover 23 together with the movable bracket 32, the angle of the tillage cover 23, the support frame 35, the straw forming device 41 and the seeding device 7 can be adjusted with respect to the rotary machine frame 22 around the claw shaft 29. ing.

As a result, even when the plowing depth of the rotary tiller 9 is changed by the height adjusting mechanism 52 of the gauge wheel 50 described later, the attachment means 30 is adjusted so that the hull forming device 41 is supported substantially horizontally and the seeding device 7 It is possible to keep the sowing position at a predetermined height.
As shown in FIGS. 2, 3, and 4, the support frame 35 includes a tool bar 36 disposed in the left-right direction at the rear ends of the left and right movable brackets 32, and a left and right frame body 37 protruding downward from the tool bar 36. And a support 38 projecting rearward from the tool bar 36.

The toolbar 36 is constituted by a square pipe or the like, and is connected to the rear end of the left and right movable bracket 32 by welding or the like.
The frame body 37 is a frame material that protrudes downward from the vicinity of the rear end of each of the left and right movable brackets 32 in the tool bar 36, and the heel forming device 61 of the heel forming apparatus 41 is fixed to the lower end of the frame body 37. Yes. The frame body 37 may be fixed to the rear ends of the left and right movable brackets 32.

The support body 38 is a plate body that protrudes rearward from the vicinity of the center in the left-right direction of the tool bar 36, and a support column 48 of the seeding device 7 is attached to the rear end thereof.
The culvert forming device 41 guides the upper plate 39 attached along the rear edge of the tilling cover 23 and the soil radiated rearward from the rotary cultivating portion 9 on the lower side from the upper plate 39 to the center in the left-right direction. A pair of left and right guide plates 40, and a saddle former 61 extending rearward from the inner edge of each of the left and right guide plates 40.

The upper plate 39 is a flat plate member extending substantially horizontally from the rear end of the tillage cover 23 to the rear, and has a shape that tapers toward the rear in plan view.
The guide plate 40 has two left and right plates arranged in a substantially C shape in plan view, and has a vertical opening 40 a formed between the left and right guide plates 40, and rearward from the rotary tiller 9. The expelled soil is gathered to the center erecting port 40a and guided to the rear eave forming device 61. The left and right guide plates 40 have a circular arc shape slightly inclined backward, and can scrape the soil plowed by the rotary tiller 9 and released to the rear.

The ridge former 61 includes a top plate 42 that extends substantially rearward from the erecting port 40a, and a pair of left and right side plates 43 that are attached to the left and right ends of the top plate 42 in a substantially C shape in rear view. The top plate 42 and the left and right side plates 43 are provided along the edge of the upright opening 40a.
The top plate 42 is a plate body whose front end is mounted between the left and right guide plates 40 and above the erecting port 40a, and is arranged so as to gradually lower toward the rear, and along the top plate 42 Thus, the upper surface of the ridge U is formed.

Each of the left and right side plates 43 is a plate-like body attached along the side edge of the upright opening 40a and the side edge of the top plate 42, and is arranged so as to expand toward the bottom in the rear view. A side surface of the ridge U is formed by the soil along each side plate 43. That is, the soil cultivated by the rotary cultivator 9 passes through the culvert forming device 61 and is formed into a ridge U having a substantially trapezoidal cross section.
The hull former 61 is provided such that the center in the left-right direction substantially coincides with the center in the left-right direction of the rotary tiller 3.

The seeding device 7 includes a roll holder 45 that rotatably supports a seeder roll 44 around which a seeder tape (seed string) P is wound, and a tape guide portion 46 that guides the unwound seeder tape P. .
The seeder tape P is a water-soluble tape that easily disintegrates in the soil, and has a rope-like shape so as to hold the seeds Q at regular intervals.

The roll holder 45 has a support column 48 extending upward from the rear end of the support 38 of the tool bar 36. The support column 48 is attached to the support 38 so that the front-rear position and the vertical position can be adjusted, and a rod-shaped shaft 48 a extending rightward is provided at the upper end. A seeder roll 44 is rotatably attached to the shaft body 48a.
Further, the roll holder 45 has a cover body 49 that covers the seeder roll 44 from above.

  The tape guide portion 46 is a cylindrical body that penetrates through the front left and right central portions of the top plate 42 of the bowl forming device 61, and has a guide port 46a of a seeder tape P that opens at the upper end, and a tape outlet at the lower end. 46b is opened. Moreover, the tape guide part 46 is attached to the support member 62 fixed to the front part of the upper plate 39 of the saddle former 61 so that the height can be adjusted. As the work machine 1 moves forward, the seeder tape P is unwound from the seeder roll 44, and the seeder tape P thus squeezed out passes through the tape guide portion 46 and is buried substantially horizontally at the intended depth in the cage U. The

Gauge rings (gauge members) 50 are disposed on the left and right sides of the ridge former 61 to determine the plowing depth of the rotary tiller 9 by rolling the left and right sides of the ridge U.
The left and right gauge rings 50 are supported by a support frame 51 attached to the middle part of the left and right support arms 26 so as to be swingable up and down, and the gauge ring 50 extends across the support frame 51 and the top mast 27. A height adjusting mechanism 52 for adjusting the height is provided.

In the working machine 1 configured as described above, the tractor T is placed so that the tractor T straddles the trencher groove H dug in the field F in advance and the trencher groove H is positioned at the center in the left-right direction of the tractor T. If it arrange | positions and this tractor T is made to drive forward along the trencher groove | channel H, the upper part side of the trencher groove | channel H will be cultivated by the rotary tiller part 9, and cultivated soil will be radiated back. This released soil is collected in the center by a guide plate 40 located behind the rotary tiller 9, and when the soil passes through the cage forming device 61, the cage U is set up on the trencher groove H, A seeder tape P released from the tape guide portion 46 of the sowing device 7 is embedded at a predetermined depth in the center in the left-right direction in the basket U to be molded, and seeds Q are sown in the basket U at regular intervals.

  On the other hand, in a clay field where the clump is difficult to collapse, a large clump tends to be formed, and the soil backfilled in the trencher groove H may not be densely packed in the trencher groove H, and the soil in the trencher groove H There may be a cavity. If there is a cavity in the soil in the trencher groove H, the root vegetables have the property that they stop growing when they reach the cavity, which affects the growth of the crop.

Therefore, the working machine 1 according to the present embodiment is equipped with a pressure reducing tool 64 that suppresses the soil in the trencher groove H in order to crush the cavity formed in the soil in the trencher groove H.
As shown in FIG. 2, FIG. 3 and FIG.
The pressure suppressor 64 is provided at the lower end of the column 65, and the pressure suppressor 64 and the column 65 are disposed between the rotary tiller 9 and the rod forming device 61.

  As shown in FIG. 4, the support column 65 is made of a plate material that is long in the vertical direction with the plate surface facing the left-right direction. The support column 65 is attached to a substantially center of the tool bar 36 in the left-right direction via a pair of left and right mounting plates 53. The mounting plate 53 is two plate-like bodies fixed to the front surface of the tool bar 36 in the middle in the left-right direction (the side opposite to the seeding device 7), and a plurality of mounting plates 53 are sandwiched between the left and right sides. It is attached and held so as to be adjustable in height via a fixture 47 such as a bolt or pin.

In this embodiment, the column 5 is fixedly attached to the mounting plate 53 by a fixture 47 made of a bolt, and an extra bolt insertion hole 69 through which the bolt 47 is inserted is formed in the column 5, so that the column 65 is fixed to the mounting plate 53. The mounting position can be changed, so that the column 65 can be adjusted in height.
The pressure suppressor 64 is configured by a skid (sledge) made of a plate material.

The pressure suppressor 64 includes a main wall portion 66 formed in a flat plate shape whose plate surface faces up and down, and a front wall portion 67 extending in an inclined direction inclined upward from the front end of the main wall portion 66 toward the front. And have. The lower end of the column 65 is fixed to the upper surface of the main wall portion 66 of the pressure suppressor 64 by welding or the like.
In the work of sowing at the same time as raising the ridge U on the trencher groove H by the working machine 1, the pressure suppressor 64 is moved to the trencher by running the tractor T with the central portion in the left-right direction of the tractor T aligned with the trencher groove H. It moves along the trencher groove H located at the upper part of the groove H. At that time, a load from the rotary tiller 3 or the like acts on the pressure suppressor 64. As a result, the soil in the trencher groove H is crushed and the cavity formed in the trencher groove H is crushed. Further, the front wall portion 67 having an upwardly inclined shape prevents the pressure suppressor 64 from being caught, and the soil on the front side of the front wall portion 67 is guided to the lower side of the main wall portion 66, Suppresses the soil well.

  As in the work machine 1 having the above-described configuration, the pressure suppression tool 64 made of skid is provided at the lower end of the support column 65 made of a plate material that is long in the vertical direction with the plate surface facing in the left-right direction. It can arrange | position compactly between the part 9 and the scissors former 61. FIG. Thereby, the hull former 61 does not greatly separate from the rotary tiller 9 and the distance between the rotary tiller 9 and the hull former 61 can be made appropriate.

FIG. 6 shows a work machine 1 according to the second embodiment.
In the working machine 1 according to the second embodiment, the search guide 4 that protrudes downward behind the rotary tiller 9 is provided, and a pressure suppressor 64 is attached to the search guide 4. Unlike the work machine 1 according to the first embodiment, other configurations are the same as those of the work machine 1 according to the first embodiment.

The search guide 4 includes a support column 5 attached so as to protrude downward from a midway portion in the left-right direction of the tool bar 36 and a guide unit 6 provided at the lower end of the support column 5.
The support column 5 is formed of a plate material that is long in the vertical direction with the plate surface facing in the left-right direction, like the support column 65 of the first embodiment, and has a height via a pair of left and right mounting plates 53 at approximately the center in the left-right direction of the tool bar 36. It is attached freely.

Moreover, as shown in FIG.7 (b), the front edge part of the support | pillar 5 is formed with the blade part sharpened toward the front by planar view from the upper part of this support | pillar 5 to the lower part.
In this search guide 4, as shown in FIG. 7A, the guide portion 6 is inserted into the trencher groove H, and the guide portion 6 comes into contact with the groove wall W of the trencher groove H and is guided to the groove wall W. By doing so, it is intended to make the seedling and seeding without shifting from the trencher groove H.

The search guide 4 is arranged so that the center in the left-right direction of the rotary tiller 9, the center in the left-right direction of the hook forming device 61, and the tape outlet 46 b substantially coincide with the center in the left-right direction of the guide unit 6.
As a result, the hook U can be set up just above the trencher groove H by moving the tractor T forward while aligning the guide portion 6 with the groove wall W, and Sowing (the sowing position is adjusted to the center of the trench width of the trencher groove H).

As shown in FIG. 7, the guide portion 6 is formed in a front view and a back view H shape from left and right guide walls 71 and a connecting tool 72 that connects the left and right guide walls 71.
The left and right guide walls 71 are arranged such that the wall faces in the left-right direction, and in the trencher groove H, face the groove wall W on the same side in the left-right direction of the trencher groove H, respectively. The left and right guide walls 71 are guided to the groove wall W of the trencher groove H.

Further, the front portions of the left and right guide walls 71 are inclined so that the upper and lower edges thereof are shifted to the center in the vertical direction toward the front, and are formed in a shape that is pointed forward in a side view.
The connection tool 72 is formed of a plate material and is disposed so that the plate surface faces up and down, and connects the central portions in the vertical direction of the opposing surfaces of the left and right guide walls 71. The lower end of the support column 5 is connected to the center of the upper surface of the connector 72 in the left-right direction.

A blade portion is formed on the front edge portion of the guide wall 71 and the connector 72.
In the search guide 4 having the above-described configuration, the guide portion 6 is formed in a front view and a rear view H shape, and the front portion of the guide wall 71 is formed in a sharp shape, so that the tractor T travels forward. Accordingly, when the guide portion 6 moves in the trencher groove H, the soil in the trencher groove H easily passes through the guide portion 6, and any soil field (in any clay field). The trace through which the guide portion 6 has passed is less likely to be a cavity.

  As shown in FIG. 7, the pressure suppressor 64 of the second embodiment is also configured by a skid made of a plate material, similarly to the first embodiment. The pressure suppressor 64 is located at the lower rear of the search guide 4 and is fixedly attached to the lower portion of the support column 5 of the search guide 4 via an attachment member 73. Further, the pressure suppressor 64 is located at the front portion of the ridge former 61 (frontward from the rear portion of the ridge former 61). Fixed pieces 75 are provided on the upper surface of the main wall portion 66 of the pressure suppressor 64 in the front-rear direction.

The attachment member 73 is formed of a plate material, and a front portion thereof is fixed to a lower portion of the support column 5 of the search guide 4 via a bolt 74. The attachment member 73 may be fixed to the support column 5 of the search guide 4 by welding or rivets.
A fixing piece 75 of the pressure suppressor 64 is fixed to the lower portion of the attachment member 73 by bolts, rivets, welding or the like, and the pressure suppressor 64 (the main wall portion 66) is fixed to the lower portion of the attachment member 73. . In addition, the upper surface of the main wall part 66 of the pressure suppressor 64 may be fixed to the lower end of the attachment member 73 by welding. Further, the pressure suppressor 64 may be fixed to the column 5 by welding.

In the second embodiment having the above-described configuration, when the trace that the guide portion 6 of the search guide 4 has passed becomes a cavity, the cavity can be crushed by the pressure-reducing tool 64 located behind the search guide 4.
In the second embodiment, the height of the pressure suppressor 64 may be adjusted by adjusting the height of the support column 5 of the search guide 4. However, as shown in FIG. You may make it attach to the support | pillar 5 so that height adjustment is possible.

In the illustrated example, the mounting member 73 is fixed to the column 5 by a plurality of bolts 74, and the mounting position of the mounting member 73 with respect to the column 5 is changed by forming an extra bolt insertion hole 70 through which the bolt 74 is inserted in the column 5. This makes it possible to adjust the height of the pressure suppressor 64.
FIG. 9 shows a third embodiment.

The third embodiment is different from each of the embodiments described above in that a transplanting means 8 is provided instead of the seeding device 7 as the counter working unit. Further, the third embodiment differs from the first embodiment in that the shape of the pressure suppressor 64 is different. Other configurations are the same as those in the above embodiments.
The transplanting means 8 has a planting machine 55 provided on the toolbar 36, and transplants the seedling N from the seedling supply machine into the cocoon U.

The planting machine 55 includes an upper support cylinder 56 and a planting cup (opener) 57 that can be opened and closed before and after the support cylinder 56.
The planting cup 57 is in a closed state and is formed in an upward open cup shape that is formed in a substantially conical shape that is tapered toward the lower side so that the seedling N can be accommodated therein. Yes. In addition, the planting cup 57 is opened when the planting cup 57 descends and enters the basket U, thereby forming a planting hole in the basket U and allowing the seedling N to fall and be released into the planting hole.

In addition, the drop position of the seedling N released from the planting cup 57 substantially coincides with the center of the work machine 1 in the left-right direction, and the search guide 4 is inserted into the trencher groove H to follow the groove wall W. The planting position of the seedling N in the heel width direction in the transplanting means 8 can be substantially aligned with the groove width center of the trencher groove H simply by moving the ground working device 1 forward.
The counter working unit may be a multi-film laying unit, a fertilizing unit, or the like instead of the seeding device 7 and the transplanting unit 8.

The pressure suppressor 64 has side wall portions 68 that extend upward from the left and right ends of the main wall portion 66. The side wall portion 68 allows the pressure suppressor 64 to have the function of the guide portion 6 of the search guide 4.
FIG. 10 shows a fourth embodiment. FIG. 10 shows a state in which the pressure suppressor 64 is in a working state in which the soil in the trencher groove H is suppressed.

  In the fourth embodiment, the attachment member 73 is pivotally connected to the support pillar 5 of the search guide 4 (or the support pillar 65 of the first embodiment) by a pivot 81 so as to be rotatable around the axis in the left-right direction. The front portion of the member 73 extends forward from the support column 5 (65), and a spring hook 82 is provided on the extension portion 73a of the mounting member 73 extending forward from the support column 5 (65), and includes a tension spring. One end (front end) side of the biasing spring 83 is latched, and the other end (rear end) side of the biasing spring 83 is latched on a spring hooking portion 84 provided on the column 5 (65). About another structure, it is comprised similarly to the said embodiment.

In the fourth embodiment, the pressure suppressor 64 is urged downward by the urging spring 83, so that the soil in the trencher groove H can be reliably crushed by this urging force.
In addition, this invention is not limited to embodiment mentioned above.
The pressure suppressor 64 is not limited to a skid as long as the soil in the trencher groove H can be suppressed, and the pressure suppressor 64 may be formed by a wheel such as a tire, for example. .

  Moreover, each structure of the working machine 1, or the whole structure, shape, dimension, etc. can be suitably changed along the meaning of this invention. For example, the work machine 1 may not be provided with the seeding device 7 and may perform the seeding operation in a later process (separate from the seeding operation) after the seedling operation.

4 Search Guide 5 Strut 6 Guide Section 9 Rotary Plowing Section 61 Spear Forming Device 64 Squeezing Tool 65 Strut H Trencher Groove T Traveling Vehicle (Tractor)
U Ｗ W groove wall

Claims (7)

The rotary tiller has a rotary tiller and a straw former disposed at the rear of the rotary tiller. It is a working machine that puts a ridge on the trencher groove with a ridge former,
A working machine comprising a pressure-reducing tool for repressing the soil in the trencher groove at the rear of the rotary tiller and at the front of the rear portion of the ridge former.   The working machine according to claim 1, wherein the pressure suppressor is biased downward.   The working machine according to claim 1, wherein the pressure suppression tool is configured by a skid.   The support | pillar which consists of a board | plate material which is long in the up-down direction in which a board surface turns to the left-right direction was provided between the rotary tillage part and the ridge forming machine, and the said pressure suppression tool was provided in this support | pillar The working machine according to any one of the above.   The search guide which is inserted into the trencher groove and guided by the groove wall of the trencher groove is provided, and a pressure suppressor is arranged on the rear side of the search guide. The working machine described.   The work machine according to claim 5, wherein a pressure suppressor is attached to the search guide.   The work implement according to any one of claims 1 to 6, wherein the pressure suppressor is provided so as to be adjustable in height.

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