JP3429730B2 - Tiller mounting device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for mounting a tilling claw, and more particularly to accurately positioning the root of the tilling claw to a claw receiving port of a box type claw mounting bracket which is planted and fixed to a claw shaft. The device is designed so that it can be quickly inserted into the state, and nevertheless there is no risk of rattling or loosening, and a fixed state can be maintained.

[0002]

10 to 12 show a mounting device for a tilling claw (1) used in a conventional rotary tiller, and (2) shows a claw that is rotationally driven in the direction of an arrow (f). A shaft, (3) is a box-shaped pawl mounting bracket that is planted and fixed to the circumferential surface of the pawl shaft (2), and is formed from a pair of U-shaped side frame members (3a) (3b) of different sizes. By being assembled and integrated, a rectangular shape having a constant opening length (y) and opening width (x) extending along the rotation advancing direction (front-back direction) (f) of the pawl shaft (2). The nail receiving port (g) is defined.

(4a) and (4b) are a pair of front and rear wall surfaces facing each other while maintaining the opening length (y) of the claw receiving opening (g), and (5a) and (5b) are also the claw receiving opening (g). ) Is a pair of left and right side wall surfaces facing each other while maintaining the opening width (x), and one of the side wall surfaces (5b) receives a large-angled head portion (6a) of the mounting bolt (6) for the plowing claw. The hole (7), and the other side wall surface (5a) also have a round hole (8) for receiving the screw shaft portion (6b) of the mounting bolt (6). Is formed to penetrate through. (D1) and (d2) respectively show the claw receiving depths on the front wall surface (4a) and the rear wall surface (4b) in the claw receiving opening (g).

On the other hand, the root portion (1a) of the tilling claw (1) inserted into the claw receiving opening (g) of the claw mounting bracket (3) has a rectangular cross section which substantially corresponds to the claw receiving opening (g). The plate width (w) is substantially equal to the opening length (y) and the plate thickness (t) is substantially equal to the opening width (x).

Moreover, the tilling claw (1) has a root portion (1).
As it goes from a) to the tip (1b), it is shaped like an arc that smoothly curves backward or left or right,
A sharp blade portion (1c) is also machined along the convex curved front edge. Reference numeral (9) is a round hole formed through the root portion (1a) of the tilling claw (1) to receive the screw shaft portion (6b) of the mounting bolt (6). (R) shows the turning radius of the tilling claw (1), and (p) shows the acting direction of the tilling load.

In the device for mounting the tilling claw (1), the root (1a) of the tilling claw (1) is inserted into the claw receiving opening (g) of the claw mounting bracket (3), and the root (1a) is inserted. The mounting bolt receiving round hole (9) is made to communicate with the same square hole (7) and round hole (8) of the claw mounting bracket (3), and is parallel to the claw shaft (2) from the lateral direction. The mounting bolt (6) is inserted and penetrated, and the fixing nut (10) is fastened to the screw shaft portion (6b) of the mounting bolt (6), so that the tillage claw (1) is attached to the claw mounting bracket (3). It is detachably and exchangeably attached and fixed so that it can be used for soil tillage work.

[0007]

However, the above-mentioned claw mounting bracket which is opened as a rectangle having an opening length (y) along the rotation advancing direction (front-back direction) (f) of the claw shaft (2) ( 3) A type for inserting the root portion (1a) of the plowing claw (1) having a rectangular cross section into the claw receiving port (g) of (3) and having a plate width (w) substantially equal to the opening length (y). In this case, the root portion (1a) of the tilling claw (1) is connected to the front wall surface (4a) and the rear wall surface (4) of the nail receiving opening (g).
b) The plowing load (p) of the plowing claw (1), which comes into full contact with the mounting bolt (6) and acts around the fulcrum of the mounting bolt (6), is applied to the inner wall of the front wall surface (4 a). (A) and the special inlet portion (B) of the rear wall surface (4b) require a pressure receiving area to be covered, and therefore the claw receiving depth (d1) (d1) on the front wall surface (4a) and the rear wall surface (4b) ( It is difficult to insert the claw mounting bracket (3) into the claw mounting bracket (3) easily and reasonably, since the roots (1a) of the tilling claws (1) must be inserted so deeply that d2) has a considerably deep dimension. Becomes

However, the plate width (w) of the root portion (1a) of the tilling claw (1) is narrowed or the opening length (y) of the claw receiving port (g) is widened. As a result, the front wall surface (4a) and the rear wall surface (4b) of the root portion (1a) of the tilling nail (1) and the nail receiving opening (g) thereof.
If a large gap is secured between the and, and the above insertion work is facilitated, rattling of the tilling claw (1) is likely to occur, and the mounting bolt (6) also loosens early. There's a problem.

The front wall surface (4a) and the rear wall surface (4) of the claw receiving opening (g) opening in the claw mounting bracket (3).
b) has a simple flat surface over the entire nail receiving depth (d1) (d2), and the root (1a) of the plowing nail (1) also has the opening length (y). As a substantially constant plate width (w), the above-mentioned claw receiving port (g)
Since it can be inserted deeply until it comes into contact with the circumferential surface of the claw shaft (2), it is necessary to visually check from the left and right lateral directions. A round hole (9) for receiving a mounting bolt that opens at the base portion (12a) is formed in the same square hole (7) of the claw mounting bracket (3).
In addition, it is difficult to perform the positioning work for matching and communicating with the round hole (8).

In this respect, the turning radius (r) of the tilling claw (1) is constant, and only the thickness of the claw shaft (2) is thick or thin in consideration of the weight and strength of the rotary tiller. There is a case where it is changed, and in the specification that has been changed particularly thinly, a space (s) maintained between the root portion (1a) of the tilling claw (1) and the circumferential surface of the claw shaft (2). Becomes larger and the plowing claw (1) is inserted too much, which makes the positioning work more difficult. It is necessary to make visual checks one by one and make corrections so that the excessive insertion is returned, which is very annoying.

[0011]

DISCLOSURE OF THE INVENTION The present invention is intended to improve the above-mentioned various problems. Therefore, a rectangular pawl receiving opening having an opening length extending along the rotational traveling direction of the pawl shaft is provided for that purpose. The claw mounting bracket provided is planted and fixed on the circumferential surface of the claw shaft,

A mounting bolt having a root portion of a plowing pawl having a rectangular cross-section that is substantially corresponding and inserted into the pawl receiving port is inserted, and is inserted and penetrated in parallel with the pawl shaft from the lateral direction, and a screw of the mounting bolt. With a fixing nut for fastening to the shaft part, in a mounting device for a tilling claw for fixing the root part of the above-mentioned tilling claw to a claw mounting bracket,

While the positioning stopper for inserting the tilling claw is raised inward from the front wall surface of the claw receiving port by a predetermined amount,

[0014] with the locking notch to respond a pair therewith to impart to the front edge of the root portion of the tilling claws, also after the root portion
To the edge a constant larger than a certain amount of the above positioning stopper
By providing a certain amount of escape notch, the root of the tilling claw, which is dimensioned to have a plate width narrower than the opening length of the claw receiving port, reaches the depth where the locking notch is received by the positioning stopper. When plugged into

The round holes for receiving the screw shafts of the mounting bolts, which are open at the base of the tilling claw, are open on both side wall surfaces of the claw mounting bracket which face each other. It is characterized in that it is set so as to be kept in a positioning state in which the square hole for receiving the portion and the round hole for receiving the screw shaft portion are matched and communicated with each other.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will now be described with reference to the drawings.
1 to 8 are detailed in detail, the tiller according to the present invention is shown.
The mounting device of (11) is shown, and (12) is a conventional device.
It is a claw shaft that is used in the same way as a tarry tiller.
Therefore, it is driven to rotate in the direction of the arrow (F).

(13) melts onto the circumferential surface of the pawl shaft (12)
With a box-shaped claw mounting bracket that is planted and fixed by contact
There are U-shaped side frames with different sizes as shown in Figs.
Assemble from a pair of gold (13a) (13b) facing each other
By being integrated, the rotation progress of the pawl shaft (12)
Constant opening length that extends along the direction (front-back direction) (F)
(Y) and opening width (X)
It defines the mouth (G).

(14a) and (14b) are the claw receiving ports
Of the side wall surfaces facing each other while maintaining the opening width (X) of (G)
It is a pair of left and right, and one side wall surface (14b) is
Large-diameter square head (15a) of the mounting bolt (15) for tillage nails
A square hole (16) for receiving the other side wall surface (1
4a) also has a screw shaft portion (15) of the mounting bolt (15).
The round holes (17) for receiving b) are correctly oriented with respect to each other.
The penetrating holes are formed in a depth-wise relationship with each other.

(18a) and (18b) are also the claw receiving
The front wall surface facing each other while maintaining the opening length (Y) of the mouth (G)
Although it is a pair with the rear wall surface, the rear wall surface (18
b) simple over the entire nail receiving depth (D2)
Although it has a flat surface, the front wall surface (18a)
Is the middle depth position of the constant nail receiving depth (D1)
Position for inserting the inwardly raised plow tab
It is provided with a stopper (19).

Moreover, the positioning stopper (19)
Is raised in a smooth arc shape when viewed from the left and right sides.
The bottom part (11a) of the plowing claw (11) described below.
You can accept and guide to a predetermined depth (D3) without difficulty.
Growling.

That is, the nail receiving port (G) is defined.
The box-shaped claw mounting bracket (13) has large and small
Different U-shaped side frame metal (13a) (13b)
Reinforced to fit, its small U-shaped side
A pair of bent pieces that face inward from both front and rear ends of the frame (13b)
Is the front wall surface (18a) and the rear wall of the nail receiving opening (G)
While forming the surface (18b), the front wall surface (18
a) Positioning for inserting the plowing claw where the mid-depth position is partial
As a stopper (19), face the rear wall (18b)
A certain amount (H) is projected in an arc shape,
Opening length (Z) at the middle depth position in the inlet (G)
Is narrower than the opening length (Y) at the entrance.
It is.

The positioning stopper (19) is a nail receiver.
A certain amount raised from the front wall surface (18a) of the inlet (G)
As for (H), the root part (1
Considering the narrow plate width (W2) described later in 1a), its strength
It can be appropriately selected as a dimension that does not cause deterioration.
Installed to a thickness approximately equal to the plate thickness of the V-shaped side frame (13b).
It is desirable to set.

The positioning stopper (19) is a claw receiver.
The front wall surface (18a) of the inlet (G) is divided into the inlet and the inner depth.
It is cut, and it is constant as a state of depression relative to the bump
Inner depth of the front wall surface (18a) remaining by the depth (D6)
Function as a pressure receiving surface (25) for tilling load.
ing. (26) is a positioning stopper (1
Against the ridge of 9), also the entrance of the front wall (18a)
Tillage that remains as a depressed state in the area by a certain depth (D5)
This is the introduction surface for nails.

On the other hand, the claw of the claw mounting bracket (13)
The root of the tillage claw (11) inserted into the receiving port (G)
As shown in FIGS. 5 and 6, the part (11a) has its claw receiving port.
The above-mentioned opening has a rectangular cross section that substantially corresponds to (G).
It has a constant plate thickness (T) which is almost equal to the width (X).
However, at the front edge of its root (11a),
Arc-shaped locking notch (22) corresponding to the top (19)
Is given. In addition, the cultivating claw (11) has its root part.
Going backward from (11a) to the tip (11b)
It is modeled in an arc shape that smoothly curves to either left or right
The sharp blade (11c) along the convex front edge is added.
It is also worked. (R) is the turning radius of the tiller (11),
(P) indicates the direction of action of the plowing load.

In this case, the root part (11) of the tilling claw (11)
a) is located at a location corresponding to the entrance of the nail receiving port (G)
The opening length (Y) of the claw receiving port (G)
Equal widths (W1) are provided. Therefore, plowing
The base portion (11a) of the claw (11) is the positioning stopper.
-Passing smoothly through (19), the nail receiving port (G)
The root part so that it will be inserted into the inner part
The rear edge of (11a) is almost J-shaped or
The L-shaped relief notch (27) has the above-mentioned positioning stopper.
A certain amount larger than the certain amount (H) that rises in (19)
(C) is notched and the width of the plate at the entrance
With a base portion (11a) having a plate width (W2) narrower than (W1)
And is sized.

The root portion (11a) of the tilling claw (11) is as described above.
With the claw receiving opening (G) inserted deep inside
As shown in FIG. 6, the locking notch (22) at the front edge is
Position raised from the front wall surface (18a) of the nail receiving opening (G)
It is received by the set stopper (19) and
Will be maintained at the depth (D3). (L) is the above
The notch length as the notch (27) is shown.

Rear wall surface at the claw receiving port (G)
Plowing load pressure-receiving surface (20) forming the inlet of (18b)
But remains as a wide plate width (W1) of the plowing claw (11)
It will be responsible for the root portion (11a). The pressure receiving surface
Partial nail acceptance depth (D4) at (20) is tilled
As a dimension that can withstand the weight (P), for example, the rear wall surface
(18b) for the overall nail receiving depth (D2)
It is desirable to set it to about 1/3 at the shallowest.

Moreover, the narrow plate width of the tilling claw (11).
The root portion (11a) cut out as (W2) is
Round that receives the screw shaft (15b) of the bolt (15)
A hole (23) is formed therethrough, and the root of the tiller (11) is formed.
Attach the base (11a) to the claw support of the claw mounting bracket (13).
Position to the entrance (G) so that it rises at a mid-depth position
Depth (D) received by the stopper (19)
When it is inserted up to 3), the round hole (2) of the plowing claw (11)
3) is the mounting bolt for the above-mentioned claw mounting bracket (13).
Mate connection with square hole (16) and round hole (17) for receiving
It is positioned so that it can pass through.

As a result, the mounting bolt is mounted from the left and right lateral directions.
Insert (15) in parallel with the pawl shaft (12) and penetrate
And fix it to the screw shaft (15b) of the mounting bolt (15).
By tightening the constant nut (24), the plowing claw (1
Quickly and accurately attach 1) to the claw mounting bracket (13).
It can be attached and fixed.

Final tightening the fixing nut (24)
Specifically, as suggested from FIG. 7, the root of the plowing claw (11)
The base part (11a) has a large-diameter square head part for the mounting bolt (15)
(15a) allows the nail receiving port (G)
Pull to the other side wall surface (14a) to be crimped
The result is a stable and strong grip.

Further, the root part (11a) of the tilling claw (11)
To the claw receiving opening (G) of the claw mounting bracket (13).
When it is inserted, it is in the middle depth position of the claw receiving port (G)
Abut the positioning stopper (19) that is raised to
As a result, it is received at the predetermined depth (D3),
There is no danger of overdoing, and as a result of the tillage claws (11)
The radius of gyration (R) is fixed and it is the thickness of the claw shaft (12).
By changing the injury finely, the nail shaft (12)
Phase of the circumferential surface and the root part (11a) of the plowing claw (11)
Even if the space (S) held between each other becomes large,
Not affected by this, still tilling nails
Attach (11) to the claw mounting bracket (13)
Can be installed quickly in the positioning state.

In the embodiment shown in FIGS. 1 to 8, the plowing claw (1
1) Root (11a) and its claw mounting bracket (1)
3) is curved in an arc shape that is inclined rearward
However, as shown in the partially modified embodiment of FIG.
It does not matter if it is formed into a slate. Also, the size difference
Assemble from U-shaped side frame metal (13a) (13b)
The integrated nail mounting bracket (13) is shown.
The claw mounting bracket (13 ) is integrated (one piece)
As a square cylinder of, it is planted and fixed on the circumferential surface of the nail shaft (12).
The present invention can be applied to these forms.
Of course.

In such a constitution of the present invention, the plowing nail is provided.
At the front edge of the root portion (11a) in (11), the nail receiving
Positioning strip protruding from the front wall surface (18a) of the opening (G)
A circular arc-shaped locking notch (2 that engages with the topper (19)
Even if 2) is added, its root (11a)
Since there is a notch (27) on the trailing edge,
As shown by the chain line in Fig. 8, the claw mounting bracket (1
3) In the inner part of the nail receiving port (G)
Can be plugged.

Then, the engaging notch of the tilling claw (11)
(22) is a positioning stopper for the front wall surface (18a)
When received by (19), the tiller (1
Accepts mounting bolts that open at the root (11a) of 1)
The round hole (23) for the claw mounting bracket (13)
Also mates and communicates with square hole (16) and round hole (17)
As a result of being positioned, it is mounted from the left and right sides
Insert the bolt (15) quickly and let it go through,
Fasten the fixing nut (24) to the shaft (15b).
It is possible to attach the tiller (11) to the workability.
Excellent.

Moreover, at the above-mentioned claw receiving port (G)
An arc shape protruding from the mid-depth position of the front wall surface (18a)
The positioning stopper (19) of is located on the tilling claw (11).
By engaging with the locking notch (22), its plowing claw
Since it also functions as a retainer of (11),
The root portion (11a) of the tilling nail (11) is the nail receiving port.
(G) Does not come into full contact with the rear wall surface (18b),
Partial contact with shallow plowing load pressure surface (20) at mouth
Combined with the fact that only
Rattling in the attached state and its mounting bolt (15)
The risk of relaxation can be reliably prevented.

Also, take the above-mentioned claw mounting bracket (13)
While using the attached tillage claw (11), its mounting bolt
The plowing load (P) acting around the fulcrum of (15) is
Make sure that the inner wall of the front wall (18a) at the entrance (G) is
The pressure receiving surface for plowing load (25) and the rear wall surface (18)
On the pressure receiving surface (20) for tillage load located at the entrance of b)
Therefore, it is taken care of, and the root part of the tilling claw (11)
The relief notch (27) provided at the trailing edge of (11a) has a shadow.
Since it is not echoed, the escape notch (27) is formed without any problem.
Then, it is easy to insert the tilling claw (11) and the rattling is caused.
It can be used to prevent loosening.

The root part (11a) of the plowing nail (11) is
Positioning to raise the nail receiving port (G) to a mid-depth position
Abut the stopper (19) so that
Since it is received at the inset depth (D3), the pawl shaft (1
Even if the specifications in 2) are changed to a thinner thickness, the plowing claws
It goes without saying that the insertion of (11) does not occur too much.
Yes.

[0038]

As described above, according to the present invention, the claw shaft (12) is used.
Of the opening length (Y) that extends along the rotation direction (F) of
Claw mounting bracket with rectangular claw receiving port (G)
(13) is planted and fixed on the circumferential surface of the pawl shaft (12).
Along with

Almost corresponding to the above-mentioned claw receiving port (G)
The root (11) of the plowing claw (11) with a rectangular cross section that matches
After inserting a), from the left and right lateral direction above the claw shaft (12)
And the mounting bolt (15)
Fasten to the screw shaft (15b) of the mounting bolt (15)
With the fixing nut (24), the root of the tilling claw (11)
Tillage for fixing part (11a) to claw mounting bracket (13)
In the attachment device of the nail (11),

The front wall surface (18) of the above-mentioned claw receiving port (G)
Positioning stopper (19) for inserting the tilling claw from a)
Is raised inward by a certain amount (H),

A corresponding locking notch (22) is provided with the above-mentioned tillage.
It is applied to the front edge of the root (11a) of the nail (11) .
And the above-mentioned positioning to the rear edge of the root (11a) as well.
A constant larger than a certain amount (H) of the stopper (19)
By providing a relief notch (27) of the amount (C),
A plate narrower than the opening length (Y) of the claw receiving opening (G)
Root (1) of the plowing claw (11) sized to the width (W2)
1a), the locking notch (22) of which has the above-mentioned positioning stopper.
Claw up to the depth (D3) received by the par (19)
When plugged into the receiving port (G),

At the base (11a) of the tilling claw (11)
Receiving the screw shaft of the mounting bolt (15) that is open
The round hole (23) for the re-entry is self-contained on the claw mounting bracket (1
On both side wall surfaces (14a) (14b) facing each other in 3)
Receiving the square head of the mounting bolt (15) which is also open
Square hole (16) for rotation and round hole (1
7) Established so that the positioning state that matches and communicates with
To improve the problems of the prior art mentioned at the beginning.
There is an effect that can be done.

Particularly, if the configuration of claim 2 is adopted,
The front and rear ends of the claw mounting bracket (13) differ in size.
Overlap of U-shaped side frame metal (13a) (13b)
Against the plowing load (P) of the plowing claw (11)
While improving the strength, the small U-shaped side
Insert the bent piece inward from the front end of the frame (13b) into the nail
Plowing here as the front wall (18a) of the receiving port (G)
The positioning stopper (19) for inserting the claws can be easily
Also, insert the locking notch (22) of the tilling claw (11) in a predetermined manner.
High-precision arc shape that can accept and guide up to the depth (D3)
It has excellent processability.

Further, in the structure of claim 1, the cultivating claw (11) is
A root notch (11a) has a relief cutout provided at its trailing edge.
By (27), the opening length (Y) of the nail receiving port (G)
Narrow plate width (W2) that is narrower than
(G) Does not come into full contact with the rear wall surface (18b),
It is dimensioned for easy insertion, in which case claim 3
Adopting the structure, the front wall in the above-mentioned claw receiving port (G)
Position for inserting the tilling claw from the mid-depth position of the surface (18a)
To thrust force the stopper (19) to the partial arc mode determined
As a result, the front wall surface (1
8a) is used as the pressure receiving surface (25) for tilling load.
While touching the front edge of the tillage claw (11) to this,
Entrance part of the rear wall surface (18b) in the nail receiving opening (G)
Is used as the pressure receiving surface (20) for tilling load.
Remains as wide plate width (W1) in the claw (11)
If the rear edge of the root part (11a) is to be contacted, the above
Even if a relief notch (27) is provided to make it easier to insert,
Stable and firmly receive the plowing load (P) of the plowing claw (11).
It can be held, and rattling of the tiller (11) and mounting
It has the effect of preventing the relaxation of Rult (15).

[Brief description of drawings]

1 is a side view showing a planting condition of the pawl mounting bracket according to the present onset bright.

FIG. 2 is an enlarged sectional view taken along line 2-2 of FIG.

FIG. 3 is an enlarged sectional view taken along line 3-3 of FIG.

FIG. 4 is a planting state of a claw mounting bracket corresponding to FIG .
It is a side sectional view showing a state.

FIG. 5 is a side view showing a tilling claw corresponding to a claw mounting bracket .
It is a figure.

FIG. 6 is a side sectional view showing a mounting and use state of a tilling claw.

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

[ Fig.8 ] Excessive insertion of the tilling claw into the claw mounting bracket
FIG.

9 is a side sectional view showing a partially modified embodiment corresponding to FIG .
It is a figure.

FIG. 10: Plow used in a conventional rotary tiller
It is a front view showing a claw.

FIG. 11 is a side sectional view showing a conventional tillage claw attaching device.
It

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

Claims (3)

(57) [Claims] 1. A rectangular claw receiving port (G) having an opening length (Y) extending along a direction of rotation (F) of rotation of a claw shaft (12).
The claw mounting bracket (13) provided with the claw shaft (1
In addition to planting and fixing it on the circumferential surface of 2), the root (11a) of the plowing claw (11) having a substantially rectangular cross section is inserted into the claw receiving port (G), and the above-mentioned is applied from the left and right lateral directions. The base of the above-mentioned tillage claw (11) is composed of a mounting bolt (15) which is inserted and penetrated in parallel with the pawl shaft (12) and a fixing nut (24) which is fastened to a screw shaft portion (15b) of the mounting bolt (15). Division (11
Plowing claw (1) for fixing a) to the claw mounting bracket (13)
In the mounting device of 1), a positioning stopper (19) for inserting a plowing claw from the front wall surface (18a) of the claw receiving port (G) is fixed (H).
While to bulge inwardly by which a locking the corresponding notches (22) of the tilling claws (11)
With conferring to the front edge of the root portion (11a) in, the
Positioning stopper to the rear edge of the root part (11a)
(19) A fixed amount (C) larger than the fixed amount (H) is released.
By providing the cutout (27), the root portion (11a) of the tilling claw (11) sized to a plate width (W2) narrower than the opening length (Y) of the claw receiving opening (G) is formed. , The locking notch (22) has the positioning stopper (19).
When the screw is inserted into the claw receiving port (G) to a depth (D3) that can be received by, the screw shaft part receiving round of the mounting bolt (15) opened at the root part (11a) of the tilling claw (11). Hole (2
3) is open to both side wall surfaces (14a) and (14b) of the claw mounting bracket (13) which face each other, and the square head receiving square hole (1) of the same mounting bolt (15).
6) and a mounting device for a tilling claw, characterized in that it is determined so as to be kept in a positioning state in which the circular hole (17) for receiving the screw shaft portion is in matching communication. 2. A front end portion of the U-shaped side frame gold different magnitude pawl mounting bracket (13) (13a) integrally assembled from a pair of opposing with (13b), the small U-shaped side frame gold (13b) inward rather the bent piece as front wall (18a) of the claw receiving opening (G) from the front wall (18
While the positioning stopper (19) for inserting the tiller claw having an arc shape is protruded rearward from a ) by a certain amount (H), the locking notch (22) received by the positioning stopper (19) is provided in the tiller (11). Root (1
1a) to the front edge of the positioning stopper (19) and bite
The apparatus for mounting a tilling claw according to claim 1 , wherein the mounting device is provided in an arcuate shape in side view . 3. A front wall surface (18 ) of the nail receiving opening (G).
a) A certain amount (H) with the positioning stopper (19) for inserting the tilling claw as a partial arc shape from the middle depth position
By causing thrust inward by said front wall surface (1 relatively depressed and raised its positioning stopper (19)
8a) is the inner part of the root (1) of the plowing claw (11).
1a) as a pressure receiving surface (25) for plowing load that contacts the front edge
And the inlet portion of the rear wall surface (18b) of the claw receiving opening (G) is used as a pressure receiving surface (20) for tilling load.
As here, a wide plate width (W1) which is almost the same as the opening length (Y) of the nail receiving port (G) in the tilling nail (11).
Root portion (11a) mounting system of cultivating claws of claim 1, wherein the contacting the trailing edge of the remaining leave.