JP3382437B2 - Anti-winding device for rotary tillers - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anti-winding device for a rotary tiller.

[0002]

2. Description of the Related Art For example, in a side-drive type rotary tiller, a large number of claw brackets having fitting recesses at the tip are provided on the outer peripheral surface of a tiller shaft rotatably supported around an axis. The cultivating pawl is projected radially outward on the cultivating shaft by bolting the base end portion of the cultivating pawl, which is projected in the direction and fitted in the fitting recess, to the claw bracket.
In this case, in order to prevent the long culm such as grass from wrapping around the cultivating shaft, a long linear member should be installed apart from the cultivating shaft between the cultivating claws that are separated from each other in the axial direction of the cultivating shaft. There is.

Conventionally, such a linear member is made of a long steel material, a wire or the like, and both ends of the member are fixed to the nail bracket or the base end of the tilling nail directly or through mounting stays (for example, , Japanese Utility Model Publication No. 4-110402 and Japanese Utility Model Publication No. 6-11403).

[0004]

However, the above-mentioned wire member for preventing wrapping may come into contact with stones, rocks, etc. during the cultivating work, and by rotating together with the cultivating shaft, centrifugal force etc. Since the linear member bends and sways, the linear member sometimes comes into contact with the plowing claws, and the repeated linear contact causes abrasion of the linear member, which poses a problem of durability. In addition, due to the bending of the linear member as described above, stress concentration is likely to occur in the mounting portion at the end of the linear member, and damage to the linear member due to this stress concentration has been a problem.

Therefore, an object of the present invention is to provide a winding prevention device for a rotary cultivator which improves the durability of the linear member.

[0006]

[Means for Solving the Problems] In order to achieve the above object,
The present invention has taken the following technical means. That is, according to the present invention, a large number of plowing pawls 20 are radially outwardly projected on the outer peripheral surface of the plowing shaft 8 rotatably supported around the axis, and the plowing pawls 20 are separated from each other in the axial direction of the tilling shaft 8. A winding preventive device for a rotary cultivator, which comprises a wire member 28 for preventing winding from being provided between the wire member 28 and a covering member 43 for covering the outer periphery of the member 28. It has a feature.

According to this, the covering member 43 is attached to the linear member 2
Since it is provided on the outer periphery of 8, the linear member 28 is made of stone, rock,
Alternatively, direct contact with the tiller 20 can be prevented, and the durability of the linear member 28 can be improved. Further, the present invention is characterized in that the covering member 43 is rotatably provided around the outer periphery of the linear member 28. According to this, even if a long culm such as grass is wrapped around the covering member 43 itself, the covering member 4
The rotation of 3 can improve the separation of grass and the like.

Further, the present invention is characterized in that the covering member 43 is made of a resin material such as high molecular polyethylene having a high wear resistance, or a rubber material. And the present invention is
A large number of plowing pawls 20 are provided radially outward on the outer peripheral surface of the plowing shaft 8 rotatably supported around the axis, and a mounting stay 29 is provided between the plowing pawls 20 spaced apart from each other in the axial direction of the plowing shaft 8. A winding prevention device for a rotary cultivator, in which a winding-preventing linear member 28 is provided via a winding member, which is pivotally connected to an attachment stay 29 at the end of the linear member 28. It is characterized by including the connecting members 33 and 34.

According to this, at the mounting portion of the end portion of the linear member 28, the connecting member 3 swingable on the mounting stay 29 is provided.
The linear member 28 is attached via 3, 3, and the swinging or bending of the linear member 28 is absorbed by the swinging of the connecting members 33, 34 and stress concentration at the end of the linear member 28. Since it is prevented, it is possible to improve durability. Further, the present invention is characterized in that the linear member 28 is connected to the connecting member 34 so that the position thereof can be adjusted in the longitudinal direction, and particularly when the linear member 28 is made of a wire, By adjusting the position according to the elongation, the linear member 28 can be kept in a pulled state.

Further, according to the present invention, at least two linear members 28 are provided in parallel, and both linear members 28 are provided so as to maintain a space between the linear members 28 at a middle portion in the longitudinal direction of the linear members 28. It is characterized in that it is provided with a holding member 48 laid across the linear members 28. When two or more linear members 28 are provided, the long culm of grass or the like straddles each linear member 28. Even if the wire is wound, the space between the linear members 28 is prevented from being narrowed by this winding, and a decrease in the effect of preventing the winding due to the narrow space between the linear members 28 is prevented.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. 1 to 5 show a first embodiment of the present invention, and in FIGS. 4 and 5, the present invention is applied to a side drive type rotary tiller 1 in the present embodiment. The rotary tiller 1 is attached to the tractor 2 via a three-point link mechanism 3, and a support arm 5 extending from the power receiving gearbox 4 to the left and right.
A chain case 6 and side frames 7 are provided at both ends of the.

The chain case 6 and the side frame 7
A case 9 of a bearing for rotatably supporting the cultivating shaft 8 around its axis is attached to the inside of the lower end of the tractor 2, and the power receiving shaft 10 projecting forward from the gear box 4 has a PTO of the tractor 2. The shaft 11 is linked by a joint 12. Inside the support arm 5,
A power transmission shaft 14 that is driven via a power receiving shaft 10 and a gear 13 is internally mounted, and a sprocket 15 that is internally mounted on an upper portion of the chain case 6 is fixed to one end of the power transmission shaft 14. A transmission chain 17 of the sprocket 15 and a sprocket 16 provided at one end of the cultivating shaft 8 is wound around, and thereby the driving force of the PTO shaft 11 drives the cultivating shaft 8 to rotate.

Further, as shown in FIG. 5, a support frame 18 having a rectangular frame shape in plan view is projected rearward from the support arm 5, and a grounding wheel 19 for adjusting the tilling height is provided at the rear portion of the support frame 18. Is provided. In addition, arrow A
Indicates the rotation direction of the cultivating shaft 8. As shown in FIGS. 1 to 5, on the outer peripheral surface of the cultivating shaft 8, a cultivating portion 21 formed by arranging a large number of cultivating claws 20 is formed.
The upper part of is covered with a cover 22.

That is, on the outer peripheral surface of the cultivating shaft 8, a large number of rectangular claw brackets 23 each having a fitting recess 23A at the tip are provided so as to project outward in the radial direction of the cultivating shaft 8. Plowing claw 2 fitted in the fitting recess 23A of 23
A large number of tillage claws 20 are radially and radially attached to the outer peripheral surface of the tiller shaft 8 by fastening the bolts 0 to 0 respectively. Left and right side walls of the claw bracket 23 and each tilling claw 20
Through holes 25 and 26 of the bolt 24 are provided at the base end portion of the bolt 24. When the base end portion of the tilling claw 20 is fitted into the fitting recess 23A of the claw bracket 23, both through holes 25 and 26 are formed.
Are concentrically positioned.

Then, the bolt 2 inserted through the through holes 25, 26 which are positioned concentrically in the axial direction of the tiller shaft 8.
By tightening 4 with the nut 27, the tilling claw 20 can be fixed to the claw bracket 23. In order to prevent a long culm such as grass from being wound around the cultivating shaft 8, the cultivating portion 21 of the rotary cultivating device 1 is wound around a long linear member 28 along the axial direction of the cultivating shaft 8. A protection device is provided. The linear member 28 of the present embodiment is made of a long wire material that is slightly shorter than the cultivating shaft 8, and has two kinds of connecting members 33 and 34 at both ends thereof. The linear members 28 are connected to the mounting stays 29 fixed to the claw brackets 23 located at both ends of the cultivating shaft 8 in the axial direction, and the linear members 28 are supported at two points in a pulled state. In addition, a supporting member that supports the linear member 28 at its intermediate portion is provided on the claw bracket 23 at an appropriate position.
You may make it support more than a point.

As shown in FIGS. 1 and 2, each of the mounting stays 29 is formed in a substantially S shape, and the bottom piece 32 portion thereof is almost the same as or slightly larger than the opening edge portion of the tip of the claw bracket 23. Is formed in a rectangular shape to form an insertion hole 30 into which the base end of the tilling claw 20 can be inserted. Further, a through hole 31a through which the headed pin 35 for connecting the connecting members 33 and 34 is inserted is formed in the upper piece 31 portion of the attaching stay 29, and the through hole 31a is formed in the attaching stay 29. It is provided eccentrically from the center in the front-rear direction (rotational direction of the tilling shaft 8). It should be noted that this mounting stay 29 is substantially S
By forming it in a letter shape, the cultivating shaft 8 of the mounting stay 29 is formed.
The influence on the tension state of the linear member 28 due to the tilting in the axial direction is reduced.

The connecting members 33, 34 have a bifurcated shape formed in a substantially U-shape when viewed from the side, and the bifurcating portions facing each other in the vertical direction have through holes 33 penetrating both portions in the vertical direction.
a, 34a, and the through-holes 33a, 34a are aligned with the through-holes 31a formed in the mounting stay 29, and the headed pin 35 is inserted to connect the connecting members 33, 34 to the mounting stay 29. Has been done. The headed pin 35
Are retained by the retaining pin 36. And
Insertion holes 33b and 34b that are inserted in the left-right direction are formed in the two-pronged base end portions of the connecting members 33 and 34, and the end side of the linear member 28 is inserted into the insertion holes 33b and 34b. It is fixed.

Connecting members 3 provided at both ends of the linear member 28
One of the members 3, 34 (first connecting member) 33 has a forked portion that vertically opposes with the same thickness as the plate thickness of the upper piece 31 of the mounting stay 29 or at a slightly wider interval. It is horizontally swingable with respect to the mounting stay 29 via 35. Then, the insertion hole 3 of the first connecting member 33.
One end of the linear member 28 is inserted into 3a, and
The retaining member 39 having a diameter larger than that of the insertion hole 33a has the linear member 28.
The linear member 28 is fixed to the insertion hole 33a to prevent the linear member 28 from coming off.

The other connecting member (second connecting member) 34 is
The tip ends of the two-sided portions that are vertically opposed to each other are formed with a width that is the same as the plate thickness of the upper piece 31 of the mounting stay 29 or at a slightly wider interval, and are horizontal to the mounting stay 29 via the headed pin 35. It can swing freely in any direction. In addition, the base end side of the bifurcated portion of the second connecting member 34 is wider than the front end side, and an insertion hole 34b is formed in this wide width forming portion, and the insertion hole 34b corresponds to the insertion hole 34b. A fixing nut 37 is fixed to the inside. And the second connecting member 3
As shown in FIGS. 1 and 2, a bolt 40 fixed to the other end of the linear member 28 is inserted into the insertion hole 34b of No. 4 and screwed into the fixing nut 37, so that The second connecting member 34 is connected, and the position of the linear member 28 in the length direction with respect to the second connecting member 34 can be freely changed by screwing the bolt 40. Reference numeral 41 is a lock nut that prevents the bolt 40 from rotating.

With the above structure, when the linear member 28 is attached to the claw bracket 23, the opening edge portion of the tip of the corresponding claw bracket 24 corresponds so that the insertion hole 30 of each mounting stay 29 corresponds to the fitting recess 23A. Abut, then
The mounting stay 29 is fixed to each claw bracket 23 by passing the base end portion of the tillage claw 20 through the insertion hole 30 of each mounting stay 29, fitting the base end portion into the fitting recess 23A and fastening the bolt 24. Then, the linear member 28 is attached. At this time, the portion 20A that bulges from the side surface above the base end portion of the tilling claw 20 prevents the attachment stay 29 from coming off, as shown on the left side of FIG. In addition, a tilling claw 2 having a bent portion 20B shown by a two-dot chain line on the right side of FIG.
In the case of 0, this bent portion 20B is designed to prevent the removal.

Since the base end of the tilling claw 20 has a square shape and the insertion hole 30 of the mounting stay 29 has a square hole shape,
The mounting stay 29 is prevented from rotating around the claws.
The bottom piece 32 of the mounting stay 29 is the claw bracket 2
Since it is designed to cover the fitting recess 23A of No. 3,
It prevents mud and the like from entering the fitting recess 23A,
When replacing the claws, it is not necessary to remove the mud in the fitting recess 23A and the replacement is easy. In addition, as shown in FIG.
Since it is formed so as to be shorter than the front-rear width L2 of 3 and to fit within L2, the bottom piece 32 of the mounting stay 29 does not scratch the soil when the tiller shaft 8 rotates, and the bottom piece 32 The soil is not allowed to accumulate between the claw bracket 23 and the claw bracket 23.

As described above, since the linear member 28 is attached to the attaching stay 29 via the swingable connecting members 33 and 34, the linear member 28 during the tilling work.
Shaking and bending of the connecting member 3 to the mounting stay 29
This is absorbed by the swinging of the shafts 3, 34 to prevent stress concentration at both ends of the linear member 28, thus improving the durability. Also,
Normally, the claw brackets 23 at both ends on the cultivating shaft 8 are displaced from each other around the axis, but since the connecting members 33 and 34 are swingable, it is possible to cope with this displacement. ing. When the through hole 31a formed in the upper piece 31 of the attachment stay 29 is provided eccentrically with respect to the front-back direction (rotational direction of the tiller shaft 8), the claw bracket 23 is displaced around the tiller shaft 8. However, by using the same mounting stays 29 on the left and right, the axis of the tiller shaft 8 and the linear member 28
It is possible to match the axis center of the same direction in the same direction.

Further, since the linear member 28 can be positionally adjusted in the length direction with respect to one of the connecting members 33, 34 (second connecting member) 34, the linear member 28 can be adapted to the elongation of the wire. Can be maintained in a tensioned state. A coating member 43 is provided on the outer periphery of the linear member 28.
Is provided. The covering member 43 is made of a resin material such as high molecular weight polyethylene having high abrasion resistance, or a rubber material, and is formed in a pipe shape and loosely fitted in the linear member 28. Further, the length is formed to be slightly shorter than the length of the linear member 28, and the pipe inner diameter of the covering member 43 is equal to that of the linear member 28.
The diameter of the linear member 28 is larger than that of the linear member 28 and is rotatable around the outer periphery of the linear member 28.

Therefore, the covering member 43 is provided on the outer periphery of the linear member 28 to protect the linear member 28, and the linear member 28 is contacted with stones, rocks, or tilling claws during the cultivating work. The linear member 28 is prevented from being worn, and the durability of the linear member 28 is improved. In addition, the covering member 43
Is rotatable with respect to the linear member 28,
When a long culm such as grass is wrapped around the covering member 43 itself, the covering member 43 rotates to improve the separation from the covering member 43 such as grass.

FIG. 6 shows a second embodiment of the present invention. The difference from the first embodiment is that a plurality of coating members 43 for coating the linear member 28 (first embodiment) are used. That is, the covering member 43 in the form is provided separately. Other configurations are the same as those in the first embodiment, and therefore, the same reference numerals are given. The covering member 43 in the present embodiment is formed in the same pipe shape as that of the first embodiment, and the large number of covering members 43 are each rotatable around the outer circumference of the linear member 28. That is, when a long culm of grass or the like is wrapped around the covering member 43 itself, each covering member 43 rotates around the outer periphery of the linear member 28 to improve the separation of the grass or the like. The members 43 are easy to rotate due to their short lengths, and can be rotated in different directions. Therefore, the weeds can be separated more easily than the covering member 43 of the first embodiment. It is possible to

In the first and second embodiments, the connecting members 33 and 34 are provided only on one end of the linear member 28, and the other end is directly attached to the mounting stay (for example, as in the third embodiment described later). May be provided). Further, the second connecting member 34 whose position can be changed (the length can be changed) may be provided at both ends of the linear member 28. Then, the linear member 28 may be replaced with a wire to be a long steel material. FIG. 7 shows a third embodiment of the present invention. In this embodiment, the attachment stay 29B is formed in a substantially L shape, and the bottom piece 32 thereof is the same as in the first and second embodiments. The through hole 30 is formed in the
The bolt 40 fixed to the end of the linear member 28 is inserted into the through hole 44a, and the nut 37 and the lock nut 41 are screwed into the bolt 40 on the front and back surfaces of the standing wall piece 44a to directly attach to the mounting stay 29B. The linear member 28 is attached to. Then, as in the first and second embodiments, the pipe-shaped covering member 43 is loosely fitted to the linear member 28 made of a wire.

In the mounting stay 29, as shown in FIG. 7B, the standing wall piece 44 is inclined toward the pocket portion 20C side of the tilling claw 20, and the through hole 44 is formed in a portion corresponding to this pocket portion 20C.
a is provided. Also in the present embodiment, as in the first and second embodiments, since the linear member 28 is provided with the covering member 43, the durability of the linear member 28 is improved, and the bolt 40 is used. And nut 37, lock nut 41
The linear member 2 to the mounting stay 29B by adjusting
It is possible to adjust the position of 8 in the length direction.

In this embodiment, the mounting stay 2
9B is formed in a substantially L shape, but since it is formed in a substantially L shape in this way, the standing wall piece 44 of the mounting stay 29B is formed.
In contrast, the linear member 28 is attached in the axial direction of the tiller shaft 8 so that the tiller claw 20 hinders the attachment. Further, in order to avoid this, as described above, the tiller claw 2 is provided.
It is necessary to incline to the pocket side 20C side of 0,
If tilted, it is difficult to use a common stay on the left and right, and since stress concentration is likely to occur at the end of the linear member 28 and damage is likely to occur, problems remain.
Mounting stay 29 in the first and second embodiments shown above
As described above, the linear member 28 can be attached at a position where the linear member 28 is separated from the tilling claw 20 and does not interfere with the tilling claw 20 and can be easily horizontally swung by the headed pin 35 in the vertical direction. It is preferable that the connecting members 33, 34) are formed in a substantially S-shape so that they can be attached.

FIG. 8 shows the above first to third embodiments.
Attach the stays 29, 29B to the claw bracket 2 as shown in.
3 can be integrally formed. This is from the upper end of the side wall of the claw bracket 23 to the mounting stays 29, 29B.
In the one shown in (a), the side wall is directly extended upward, and the upper end thereof is bent in the axial direction of the tiller shaft 8 to form the upper piece 31. In the upper piece 31, a through hole 31a is formed. In the one shown in (b), the side wall is directly extended upward to form a standing wall piece 44, and the standing wall piece 44 is formed with a through hole 44a. It is what

What is shown in FIG. 8A is the above first and second
As shown in the embodiment, the connecting member 3 is formed in the through hole 31a.
The linear member 28 is connected via 3, 34, and the one shown in ( b ) is the linear member 2 as shown in the third embodiment.
The linear member 28 is directly attached to the attachment stay 29 by inserting the bolt 40 fixed to the end portion of 8 into the through hole 44a and fixing it with the nut 37 and the lock nut 41. As described above, the mounting stays 29, 29
By forming B integrally with the claw bracket 23, the number of parts can be reduced and the stays 29 and 29B can be prevented from being lost.

FIG. 9 shows a fourth embodiment of the present invention. In this embodiment, the linear member 28 is formed of a long steel rod, and both end portions of the linear member 28 are formed. And the middle part is attached corresponding to both ends in the axial direction of the tilling shaft 8 and the claw brackets 23 located in the middle. And the linear member 2
The attachment stay 29C is fixed to one end of the linear member 28, and the other end and the middle of the linear member 28 are attached to the other end of the linear member 28 and the claw bracket 23 on the tiller shaft 8 corresponding to the intermediate portion. A support member 45 that supports the portion is fixed. The outer periphery of the linear member 28 is covered with a covering member 43.

The covering member 43 is formed by coating the linear member 28 directly with a resin material, a rubber material, or the like, or by fitting a pipe-shaped member of the same quality, without rotating with respect to the linear member 28. It is fixed. The mounting stay 29C is
It is formed in the shape of a rectangular flat plate, and the insertion hole 30 is formed therein.
The insertion hole 30 has a size such that the base end portion of the tilling claw 20 can be inserted therein similarly to the first and second embodiments, and the base end portion of the tilling nail 20 is inserted into the insertion hole 30. The mounting stay 29C can be fixed to the tilling claw 20 by inserting the base end portion into the fitting recess 23A of the claw bracket 23 and fixing the bolt 24.

As shown in FIG. 9 (b), the support member 45 is formed in a tubular shape having an inner diameter large enough for the linear member 28 coated with the coating member 43 to be fitted therein, and is provided on the front side of the claw bracket 23. Alternatively, it is fixed to the rear shoulder portion by welding or the like.
To attach the linear member 28 to the claw bracket 23, insert the other end of the linear member 28 into the intermediate support member 45 and the support member 45 on the other end side, and fix the mounting stay 29C with the tilling claw 20. Can be installed with. In this embodiment,
The covering member 43 protects the linear member 28 to prevent abrasion, and the support member 45 for supporting one end and the intermediate portion of the linear member 28 is directly clawed without using a detachable stay or the like. Since it is fixed to the bracket 23, the number of parts is reduced and the stay and the like are prevented from being lost.

As shown in FIG. 9C, the pair of plate pieces 4 having the support member 45 fixed to the side wall of the claw bracket 23.
Support hole 4 formed by 7 and penetrating both of the plate pieces 47.
7a may be formed. FIG. 10 shows a fifth embodiment of the present invention, in which the linear member 28 and the covering member 43 are the same as those in the above-mentioned fourth embodiment, but the mounting stay 29C is attached to one end of the linear member 28. As well as fixing
A male screw 28a is formed at the other end, and a detachable mounting stay 29D is provided at the other end. And
A support member 45 is provided on the claw bracket 23 in the middle of the cultivating shaft 8.
Is stuck.

The mounting stay 29C fixed to one end of the linear member 28 is the same as that of the third embodiment, and the mounting stay 29D corresponding to the other end is screwable to the male screw 28a. The support member 46 formed with the female screw 46a is fixed to a rectangular flat plate having an insertion hole 30 through which the base end of the tilling claw 20 is inserted. In the present embodiment, the other end of the linear member 28 is inserted into the intermediate support member 45, and the male screw 28a of the other end is screwed into the female screw 46a of the mounting stay 29D, so that the mounting stay 29D is lined. The linear member 28 is attached by being connected to the other end of the linear member 28 and fixing both mounting stays 29C and 29D to the tilling claw 20.

As described above, the other end of the linear member 28,
The connection between the left and right mounting stays 29C and 29D can be adjusted by screwing the connection with the mounting stay 29D, and the mounting stay 29D on the other end side is
Since it is rotatable around the outer periphery of the linear member 28,
Mounting stay 29C on one end side and mounting stay 29 on the other end side
Even if the mounting angle around the axis of the linear member 28 is different from that of D, it can be handled. Further, the movement of the linear member 28 in the axial direction is restricted at both ends of the linear member 28, so that the linear member 28 is prevented from being deformed such as detached or bent.

In the above first to fifth embodiments, the case where only one linear member 28 is provided is shown, but a plurality of two or more linear members 28 are provided around the tilling shaft 8 at a predetermined interval. It may be provided. FIG. 11 shows a sixth embodiment of the present invention. In the present embodiment, two linear members 28 along the tilling shaft 8 are provided facing each other at substantially 180 ° and in parallel with each other. A holding member 48 that holds the space between the two linear members 28 is provided in the middle of the two linear members 28 in the longitudinal direction. The linear member 28
The material and its attachment are the same as those in the first and second embodiments. Although not shown, the first
The covering member 43 as shown in the embodiments of to 5 may be provided on the linear member 28.

The holding member 48 is formed by a plate member, a bar member, a spring plate, etc., which is curved in a shape substantially along the outer circumference of the tilling shaft 8, and both ends thereof are connected to the two linear members 28 to form both wires. It is bridged between the members 28. In the present embodiment, by providing the holding member 48, the interval between the two linear members 28 is kept constant, and the long culm such as grass is wound over the two linear members 28. In this case, the distance between the two linear members 28 is not narrowed. That is, when grass or the like is wound around the two linear members 28 so that the distance between the linear members 28 is narrowed, the original effect of preventing the linear members 28 from winding cannot be sufficiently exerted. By maintaining the distance between the two linear members 28 as described above, the effect of preventing the linear members 28 from winding is not impaired.

When the holding member 48 is formed of a spring plate, even if grass or the like is wound around the two linear members 28 so as to narrow the gap between them, the holding member 48 narrows the gap. Acting to widen the space against the force applied to the two linear members 28 and elastically (to allow a slight expansion / contraction movement of the space between the two linear members 28) to maintain the space between the two linear members 28. It is possible to perform an action of separating grasses or the like that are wound around the member 28. Further, the number of the linear members 28 is not limited to the case of two as described above, and in the case of three, four or more, the holding member can be provided over each of them.

FIG. 12 shows a modification of the arrangement of the linear members 28 according to the first to sixth embodiments, and (a).
Is a structure in which both end portions of the linear member 28 are arranged rearward with respect to the rotation direction A of the tilling shaft 8 and the left and right central portions of the linear member 28 are arranged frontward so as to form a substantially mountain shape.
In (b), one end of the linear member 28 is arranged on the front side with respect to the rotation direction A of the tilling shaft 8 and the other end is arranged on the rear side to support it. The linear member 28 thus arranged guides the long culm of grass or the like to the outside of the axis of the cultivating shaft 8 by the rotation of the cultivating shaft 8 as indicated by the arrow B, forcing the grass or the like. It is difficult to wind by moving it horizontally to
Even when wrapped, it is easy to separate.

In the above-mentioned first to sixth embodiments, the case where the nails used as the plowing nails are used is shown.
It may be a forward / reverse dual-use claw or the like, and as for the attachment of the cultivating claw, in addition to the rectangular tube-shaped claw bracket as in the above-mentioned embodiment, the cultivating claw is attached to the plate-shaped flange projecting radially outward on the cultivating shaft. The design can be changed as appropriate, such as by attaching
Further, the present invention can be applied not only to the side drive type rotary cultivator but also to the center drive type rotary cultivator.

[0042]

As described above, according to the present invention,
Since a covering member is provided on the wire member for preventing wrapping,
Linear members Ru can be directly improve the durability of the linear member is prevented from contacting the stone or the like. Further, according to the present invention, since the covering member is rotatably provided around the outer periphery of the linear member, even if a long culm such as grass is wrapped around the covering member itself, the covering member is rotated to cause grass or the like. Can be well separated
It

Further, according to the present invention, since the end portion of the linear member is attached to the attachment stay via the connecting member swingably pivoted, the linear member is attached at the attaching portion of the end portion of the linear member. shaking and deflection is absorbed by the connecting member swings, it is possible to prevent the stress concentration on the end portion of the linear member, Ru can improving the durability. Further, the present invention, the linear member is provided so as to be positionally adjustable in the longitudinal direction with respect to the connecting member, and when the linear member is made of a wire, according to its elongation, when made of a steel material, Adjusts its position according to the change in length due to its deformation,
But Ru can keep the tensile state.

Since a holding member for holding the space between at least two linear members is provided, even if a long culm such as grass is wrapped around each linear member 28, the winding causes the winding. hardly narrowing the interval of each linear member 28, that is preventing a decrease in winding prevention effect by the spacing between the linear members 28 is narrowed.

[Brief description of drawings]

FIG. 1 is a front view showing a winding prevention device for a rotary cultivator according to a first embodiment.

FIG. 2 is a plan view of the main part.

FIG. 3 is a perspective view of the same winding prevention device.

FIG. 4 is a front view of a rotary cultivator.

FIG. 5 is a side view showing a state in which the rotary cultivator is mounted on the tractor.

6A and 6B are diagrams showing a winding prevention device according to a second embodiment, wherein FIG. 6A is an overall perspective view and FIG. 6B is a perspective view of a main part.

7A and 7B show a winding prevention device according to a third embodiment, wherein FIG. 7A is a perspective view of a main part, FIG. 7B is a side view, and FIG. 7C is a front view.

FIG. 8 is a perspective view showing a modified example of a mounting stay.

9A and 9B show a wrap preventing device according to a fourth embodiment, wherein FIG. 9A is an overall perspective view, and FIGS. 9B and 9C are perspective views of a main part.

10A and 10B show an anti-wrapping device according to a fifth embodiment, wherein FIG. 10A is an overall perspective view, and FIG. 10B is a perspective view of a main part.

FIG. 11 is a perspective view showing a wrapping prevention device according to a sixth embodiment.

FIG. 12 is a plan view showing a modified example regarding the arrangement of linear members.

[Explanation of symbols]

1 rotary tiller 8 tillage axis 20 tillage nails 28 Linear member 29 Mounting stay 33 Connection member 34 Connection member 43 Cover member 48 holding member

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Kazumi Umeki, 64 Ishizukita-machi, Sakai City, Osaka Prefecture Kubota Co., Ltd. at the Sakai Factory (72) Inventor, Hisakatsu Anmiya 64, Ishizukitamachi, Sakai City, Osaka Prefecture Kubota Sakai Co., Ltd. In-house (72) Inventor Tsusei Tai, 64 Ishizukita-machi, Sakai-shi, Osaka In-house Kubota Sakai (56) References JP-A-7-272550 (JP, A) JP-A-5-8116 (JP, A) Actually open 4-74906 (JP, U) Actually open 60-162724 (JP, U) Actually open 52-63804 (JP, U) Patent 2544340 (JP, B2) (58) Fields investigated (Int .Cl. ⁷ , DB name) A01B 33/08

Claims (6)

(57) [Claims] 1. A large number of tilling claws (20) are provided on an outer peripheral surface of a tilling shaft (8) rotatably supported around an axis center so as to project radially outward, and are mutually arranged in an axial direction of the tilling shaft (8). A winding prevention device for a rotary cultivator, wherein a winding-preventing linear member (28) is installed between spaced-apart tilling claws (20) via a mounting stay (29) , wherein the linear member ( 28) to the mounting stay (29) at the end
A connecting member (33, 34) pivotably connected is provided.
An anti-winding device for a rotary cultivator characterized by being installed. 2. The linear member (28) is a connecting member (3).
4) The device for preventing wrapping of a rotary cultivator according to claim 1, wherein the device is coupled to the position 4) so as to be positionally adjustable . 3. The linear member (28) is provided with the member (2).
8) A covering member (43) for covering the outer circumference is provided.
Winding prevention apparatus of the rotary tiller according to claim 1 or 2, characterized in that that. 4. The covering member (43) is a linear member (2).
It is characterized in that it is installed around the outer circumference of 8).
The winding prevention device for a rotary cultivator according to claim 3 . 5. The covering member (43) has high wear resistance.
Made of resin material such as high-molecular polyethylene or rubber material
The winding prevention device for a rotary cultivator according to claim 3 or 4 , characterized in that . 6. The linear member (28) comprises at least 2
A holding member in which books are provided in parallel and are installed over both linear members (28) so as to hold the interval between the linear members (28) in the middle of the length of the linear members (28). (4
8) The anti-winding device for a rotary cultivator according to any one of claims 1 to 5, further comprising: