JPH0449842Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to a cover fixing structure for a tiller used for cultivating soil in ridges or covering soil. The opening/closing cover is pivotally attached to a rotary frame so as to be able to swing up and down, a tightening bolt is provided at the upper part of a column erected on the rotary frame, and a long hole is formed in the stay connected to the upper surface of both the opening/closing covers. , the tightening bolt is slidably inserted into the long hole of this stay, and
The present invention relates to a cover fixing structure for a tillage device, which is configured such that a stay can be fixed at an appropriate position to a support by tightening a tightening bolt.

[Conventional technology]

The soil that has been tilled by the rotary's Atsupakatsu drive is guided to the left and right by the tilling cover, and when soil is piled up on the left and right ridges or covered with soil, for example, one ridge is piled up with more soil, and the other side is piled up with more soil. In some cases, soil is not piled up in the ridges of the rotary, or only a small amount of soil is piled up.Therefore, there are various cover fixing structures that allow the cover covering the top of the rotary to be opened and closed independently on the left and right sides, and to be fixed at appropriate locations. Proposed.

For example, in the method disclosed in Japanese Utility Model Publication No. 60-8643, a long hole having an engaging portion is formed in a stay pivotally attached to the upper surface of the left and right opening/closing covers, and this stay is erected and fixed on a rotary frame. It is constructed so that it can be slid and engaged with and fixed to the support column. However, in this structure, the stays of the left and right opening/closing covers are engaged and fixed to the pillars independently, so it is not possible to open and close both the opening/closing covers at the same time, and the opening/closing operation of the covers is difficult. In addition to being troublesome, each stay is only engaged with the support, so if soil acts forcefully on the cover due to the drive of the rotary, the engagement will come off and the opening/closing cover will change its position midway through the work. There was a strong possibility that things would change.

On the other hand, for example, Japanese Utility Model Publication No. 19930-1983 has proposed a device in which both opening and closing covers can be opened and closed simultaneously. This is a structure in which the stays of both opening and closing covers are fixed to the pillar via a connecting metal fitting so that they can move up and down, and the supporting pillar is also configured to be able to swing and be fixed to the rotary frame. By moving the cover up and down relative to the left and right opening/closing covers, it is possible to open and close both covers at the same time, and by adjusting the swing angle of the support column, the opening/closing angles of the left and right opening/closing covers can be changed.

[Problem that the invention attempts to solve]

However, in the device disclosed in the above-mentioned publication, the set bolt for opening and closing both opening and closing covers at the same time and the set bolt for swinging and fixing the column are provided at different locations, so that during each operation, the set bolt is provided at different locations. You have to select and operate each set bolt at the same time, which is cumbersome to operate and can be operated by mistake.Furthermore, if you want to fix both opening/closing covers in the desired position, you have to select and operate each set bolt at the top and bottom. The disadvantage was that each operation had to be performed individually, and the operations were difficult.

The present invention has been developed focusing on the above-mentioned circumstances, and it is possible to open and close both covers that cover the top of the rotary at the same time. To provide a cover fixing structure for a tillage device which is relatively easy to operate and can be performed with one tightening bolt part.

[Means for solving problems]

That is, the characteristic configuration of the present invention is that a movable member is fitted onto the column so as to be movable up and down, and this movable member can be fixed to the column by being brought into pressure contact with the column by tightening the tightening bolt, and When the moving member is fixed with the tightening bolt, the stay is elastically fixed to the moving member via an elastic member, and its functions and effects are as follows.

[Function] When the tightening bolt is tightened, the movable member can be fixed to the support by pressure contact with the tightening bolt, and
The stay of the opening/closing cover can be elastically pressed and fixed to the movable member via the elastic member, but if the tightening bolt is slightly loosened from this state, the stay will only be fixed by slightly weakening the elastic force of the elastic member. ,
Although the movable member is held in elastic contact with the movable member, the pressure force between the movable member and the column due to the tightening bolt is reduced, and the movable member can be moved up and down with respect to the column with the stay connected. . Next, when the tightening bolt is loosened significantly, the elastic force of the elastic member will no longer hold the stay to the movable member, and both stays will be attached to the tightening bolt within the range of the elongated hole. It can be moved independently.

[Effect of idea]

As a result, with just one tightening bolt operation,
It is now possible to simultaneously adjust the open/close cover and to operate the open/close cover on one side independently, making it relatively easy to open and close both covers when filling soil into ridges or covering soil.

〔Example〕

Hereinafter, embodiments of the present invention will be described based on the drawings.

FIG. 3 shows a walk-behind tiller equipped with an opening/closing cover according to the present invention, and this walk-below tiller has an engine 6 mounted on the front part of the machine body, which is equipped with wheels 11 at the bottom via a transmission case 10. At the same time, a rotary tilling device 3 is installed at the rear of the aircraft, and a tail wheel 1 is installed at the rear end of the rotary frame 2 extending rearward from the aircraft.
4 are connected to each other so that they can be raised and lowered.

As shown in FIGS. 1 to 3, the rotary tilling device 3 includes a power transmission case 1 mounted diagonally downward from the rotary frame 2.
Tilling claw 1 rotatably supported on the lower end of 5
7 and opening/closing covers 1, 1 that cover the upper part of the tilling claws 17. The opening/closing covers 1, 1 are pivotally attached to both side surfaces of the rotary frame 2 by hinges 8 to be able to swing up and down about an axis in the longitudinal direction of the machine body, and the opening/closing angles of the covers 1, 1 can be changed as appropriate, and the tilling claws 17 It is now possible to change the direction of soil unloading using the top cut rotation drive.

Next, the fixing structure of the opening/closing cover 1 will be explained in detail.

As shown in FIGS. 1 and 2, a support 9 is erected and fixed on the upper surface of the rotary frame 2,
A cylindrical moving member 12 is fitted onto the support 9 so as to be movable up and down. A nut 13 is welded to this moving member 12, and a tightening bolt 4 with a handle is screwed into this nut 13, and by tightening this tightening bolt 4, the tip 4b of the tightening bolt 4 and the above-mentioned The column 9 is held between the movable member 12 and the movable member 12 can be fixed at appropriate positions above and below the column 9.

A long hole 5a is provided on the upper surface of the both opening/closing covers 1, 1.
A stay 5 is pivotally attached to the stay 5.
The tightening bolt 4 is slidably fitted into the elongated hole 5a, and the stay 5 can be slid within the range of the elongated hole 5a.
The structure is such that the stay 5 can be fixed at an appropriate location to the support column 9 by tightening. Also,
A plurality of engagement recesses 5b that can be engaged with the tightening bolts 4 are formed in the elongated hole 5a at a plurality of locations in the longitudinal direction.

An elastic washer 16 made of rubber as an elastic member is interposed between the stay 5 and the head 4a of the tightening bolt 4, and is moved by the tightening bolt 4 as described above. When the member 12 is fixed, the large-diameter head 4a of the tightening bolt 4 presses the elastic member 16 toward the support column 9, and the stay 5 is elastically pressed and fixed to the movable member 12 via the elastic washer 16. I'm starting to be able to do it.

Therefore, when the tightening bolt 4 is tightened, as shown in FIG. The stay 5 can be held between the elastic washer 16 and the nut 13, and when the tightening bolt 4 is slightly loosened, the elastic force exerted by the elastic washer 16 on the stay 5 is slightly weakened. However, while the stay 5 is still elastically held between the elastic washer 16 and the support column 9, the tip 4 of the tightening bolt 4
Since the support 9 cannot be held between the portion b and the moving member 12, the moving member 12 cannot be held between the support 9 and the moving member 12.
Therefore, the opening/closing angles of both the opening/closing covers 1, 1 can be adjusted simultaneously without changing the connecting length of the stays 5, 5.

When the tightening bolt 4 is further loosened, the elastic force of the elastic washer 16 is weakened and the stay 5 is tightened between the large diameter head 4a of the tightening bolt 4 and the nut 13.
It is no longer possible to elastically hold the
Both stays 5, 5 can be slid relative to the tightening bolt 4, both opening/closing covers 1, 1 can be made large, and only one opening/closing cover 1 can be opened/closed independently.

[Another example]

In the above embodiment, a cover for a walk-behind cultivator has been described, but the present invention may also be applied to a cover for a rotary tiller connected to the rear of an agricultural tractor.

Incidentally, although reference numerals are written in the claims section of the utility model registration for convenience of comparison with the drawings, the present invention is not limited to the structure of the attached drawings by such entry.

[Brief explanation of the drawing]

The drawings show an embodiment of the cover fixing structure of the tiller according to the present invention, in which Fig. 1 is a front view of the main part, Fig. 2 is a plan view of the main part, and Fig. 3 is an overall side view of the walking cultivator. . DESCRIPTION OF SYMBOLS 1... Opening/closing cover, 2... Rotary frame, 4... Tightening bolt, 5... Stay, 9... Support column, 12... Moving member, 16... Elastic member, 17
...Plowing claws.

Claims (1)

[Scope of utility model registration request] Left and right opening/closing covers 1 that cover the top of the tilling claws 17;
1 is pivotally mounted on a rotary frame 2 so as to be able to swing vertically, a tightening bolt 4 is provided on the upper part of a column 9 erected on the rotary frame 2, and a stay 5 is connected to the upper surface of both the opening/closing covers 1, 1. , 5 has a long hole 5
a, 5a, and the tightening bolt 4 is slidably inserted into the elongated hole 5a of this stay 5, and the stay 5a can be fixed at an appropriate position to the support 9 by tightening the tightening bolt 4. This is a cover fixing structure for a tillage device, in which a movable member 12 is fitted onto the support 9 so as to be movable up and down,
The movable member 12 is configured to be fixed to the column 9 by being brought into pressure contact with the column 9 by tightening the tightening bolt 4, and the movable member 12 is fixed to the column 9 by tightening the tightening bolt 4.
A cover fixing structure for a tillage device configured to elastically fix the stay 5 to the movable member 12 via an elastic member 16 when fixing the stay 5.