JPH0449848Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field]

The present invention allows the attachment base of the tiller claw to be easily attached to the holder provided on the tiller shaft without using any tools.
This invention relates to a tilling claw attachment device that can be easily attached and detached.

[Conventional technology]

In a tilling claw attachment device that attaches and detaches the attachment base of the tilling claw from a holder provided on a tillage shaft, generally an insertion hole is bored in the holder and the attachment base in a direction perpendicular to the direction of rotation, and a bolt is inserted into this insertion hole. Insert it through and tighten it with a nut to secure it. However, tillage claws are used in the soil, and when replacing the tillage claws, if the bolts and nuts are rusted or tightly tightened, removing them is troublesome and many problems occur. There are problems that require effort and time. In order to solve such problems, for example, Utility Model Publication No. 3043, Utility Model Publication No. 43-
As disclosed in Japanese Patent No. 10327, there is a device in which the tiller claws can be removed without using any tools by simply rotating the tiller claws in the opposite direction to the direction in which the work is performed.

[Problem that the invention attempts to solve]

However, with the above-mentioned prior art, the tilling claws easily come off from the holder, which is dangerous if they come off during tilling work, and the processing of the mounting base of the tilling claws is also troublesome, resulting in high costs. It was hot.

[Means to solve the problem]

The present invention has been made to solve the above-mentioned problems, and is a tilling claw mounting device in which the mounting base of the tilling claw is removably attached to a holder provided on the tilling shaft. An engagement pin that can be engaged with and removed from an engagement groove, and when the mounting base is rotated in the opposite direction to the rotation direction of the tilling shaft with the engagement pin engaged with the engagement groove, the tillage The present invention is characterized in that it includes a pressing portion that presses the claws into a tillable state and a spring member that has a folded portion that curves toward the rear side of the mounting base.

[Effect]

Due to the above structure, the tilling claw attachment device of the present invention is safe because the tilling claw does not easily come off from the holder when it is in the working state, and the tilling claw can be easily removed from the holder without using any tools. It is removable, the spring member has good durability, and the tilling claws can be easily attached and detached in a short time.

[Embodiments] Hereinafter, embodiments of the present invention will be described with reference to the drawings. In FIG. 1, reference numeral 1 indicates a rotary tiller;
Alternatively, in the tilling shaft of a rotary raking device, a holder 2 is fixed to the tilling shaft 1 in the radial direction, and a mounting base 4 of a tilling claw 3 is removably attached to the holder 2. As shown in detail in FIGS. 2 to 4, the holder 2 has a mounting base insertion hole 5 formed by connecting left and right opposing frame members 2a and 2b by welding. An engagement pin 6 is fixed to the frame members 2a and 2b through the frame members 2a and 2b. Further, the frame member 2a is provided with a leaf spring 7 shown in FIGS. 5 and 6.
A screw hole 8 and a fitting hole 9 are provided for mounting the plate spring 7 through a screw 10. The engagement pin 6 has a mounting base 4 for the tilling claw 3.
The engagement groove 11 provided in
When the mounting base 4 is rotated in a direction opposite to the arrow direction in the figure, a portion of the mounting base 4 near the outer end of the holder 2 is pressed and fixed by a leaf spring 7. As shown in FIGS. 5 and 6, the leaf spring 7 includes a mounting hole 7a, fitting protrusions 7b that fit into the fitting hole 9, and a side surface of the mounting base 2 within the base insertion hole 5. It has a pressing part 7c that presses elastically, and a folded part 7d that curves from the tip of the pressing part 7c toward the back side of the base 4 along the inner wall surface of the holder 2, and the screw 10 is inserted into the mounting hole 7a. screw hole 8
At that time, the fitting protrusions 7b, 7b are fitted into the fitting holes 9 formed in the holder 2 and positioned,
The pressing portion 7d elastically presses the side surface of the mounting base 4 of the tilling claw 3. In addition, the folded portion 7d reduces the gap between the back of the mounting base 4 and the back of the holder 2,
Further, the spring effect of the pressing portion 7c is promoted. In the tilling claw attachment device having such a configuration, when attaching the tilling claws 3 to the holder 2, the mounting base 4 is inserted into the mounting base insertion hole 5, and the engagement groove 11 is engaged with the engagement pin 6. When the tilling shaft 1 is slightly rotated in a direction opposite to the direction of rotation, the mounting base 4 is elastically pressed against the pressing portion 7c of the spring plate 7 and is held between the inner surface of the frame member 2b. By rotating the tilling shaft 1 in the direction of the arrow in FIG. 1, the tilling claws 3 perform tilling or plowing work. When removing the tilling claw 3 from the holder 2, if an impact is applied to the peak side of the tilling claw 3 by an appropriate means, the tilling claw 3 will rotate slightly counterclockwise in FIG. 1 around the engagement pin 6. However, the pressure contact between the mounting base 4 and the spring plate 7 is released, and by removing the engagement groove 11 from the engagement pin 6, it can be removed very easily. The spring plate 7 is attached to the holder 2 by welding, without using screw holes 8, mounting holes 7a, screws 10, etc.
It may be fixed to the holder or may be attached by other means.

[Effect of the idea]

As explained above, according to the tilling claw attachment device of the present invention, when attaching the tilling claw to the holder,
By attaching the engagement pin to the engagement groove provided at the base and slightly rotating it in the opposite direction to the direction of rotation of the tilling shaft, it will be pressed by the spring member, and it will be able to till in that state without wobbling. Able to perform work. During tilling work, the mounting base is strongly pressed by the pressing portion of the spring member, so the tilling claws do not come off the holder. When removing the tilling claw from the holder, simply rotate the tilling claw slightly in the rotational direction to release the pressure from the spring member on the mounting base and release the engagement between the engagement groove and the engagement pin. Can be easily removed. Further, since the spring member is provided with a folded portion, rattling between the mounting base and the holder is reduced, and the durability of the spring member is improved without degrading the elastic force of the pressing portion. Therefore, the operation of attaching and detaching the tiller claws to and from the holder can be performed simply, easily, and in a short time without using any tools, and the tiller claws do not come off from the holder during tilling work, making it safe.

[Brief explanation of the drawing]

Fig. 1 is a side view of the entire tilling claw attachment device of the present invention, Fig. 2 is a plan view of the holder, Fig. 3 is a side view of the same, Fig. 4 is a front view of the same, and Fig. 5 is a plan view of the spring plate. , FIG. 6 is a side view of the same. 1... Cultivation shaft, 2... Holder, 2a, 2b...
Frame member, 3... Tilling claw, 4... Mounting base, 5...
... Mounting base insertion hole, 6... Engaging pin, 7... Leaf spring, 7a... Mounting hole, 7b... Fitting protrusion, 7
c... Pressing part, 7d... Turned part, 8... Screw hole, 9... Fitting hole, 10... Screw, 11... Engaging groove.

Claims (1)

[Scope of Claim for Utility Model Registration] A tilling claw attachment device in which a mounting base of a tilling claw can be attached to and detached from a holder provided on a tillage shaft, wherein the holder has a mechanism that engages with and disengages from an engagement groove provided on the mounting base. When the mounting base is rotated in a direction opposite to the direction of rotation of the tilling shaft with the engaging pin engaged with the engaging pin and the engaging groove engaged, the tilling claw is pressed to the tillable state. A tilling claw attachment device comprising: a pressing portion; and a spring member having a folded portion curved toward the rear side of the attachment base.