JPH0773441B2 - Cover device for rotary tiller - Google Patents

Description

TECHNICAL FIELD The present invention relates to a cover device for a rotary cultivator capable of preventing soil from adhering.

(Prior Art) As a conventional art of this kind, there is one disclosed in Japanese Utility Model Laid-Open No. 52-136007, in which an elastic cover is arranged on the inner peripheral surface of an iron plate cover fixed to a rotary machine frame. The elastic cover is fixed to the iron plate cover at the front, middle, and rear portions, and the intermediate portion is slackened up and down, and the slackened portion absorbs the impact of scattered soil and prevents soil from adhering.

(Problems to be Solved by the Invention) The slack of the conventional elastic cover has a weak elastic deformation restoring force, insufficient soil adhesion preventing action and crushing action, and scattered soil collides with only one side of the slack portion. However, there is a problem that it is easily damaged locally and it is difficult to disperse the soil to the rear.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a cover device for a rotary cultivator capable of solving all the problems of the conventional art by applying tension to the elastic cover.

(Means for Solving the Problem) As a concrete means for solving the problem in the present invention, a mounting member is mounted on the rotary machine frame 7, and the cultivating part A is mounted on the mounting member.
In a cover device for a rotary cultivator, in which a front and rear side of a plate-shaped elastic cover 24 for covering the elastic cover 24 is attached, an edging member 26 is provided on the front and rear and other sides of the elastic cover 24, and a fixed side including the rotary machine frame 7 and a mounting member The elastic cover 24 is provided with a tension applying mechanism 27 for applying a tension in the front-back direction intersecting the plate surface between the edging member 26 and the edging member 26, and the tension applying mechanism 27 is provided with the tension adjusting means 38.

(Operation) The elastic cover 24 covers the cultivating part A in a state of being pulled in the front-back direction intersecting the plate surface by the tension applying mechanism 27, and when the soil scattered from the cultivating part A collides with the elastic cover 24, the coil spring The elastic cover 24 elastically deforms along with the elastic deformation of 35, detaches the attached soil, and repels the soil to the rear or the cultivating part by the restoring force and sends the scattered soil to the rear while crushing the soil. .

When the elastic cover 24 extends or when the field conditions change, the tension adjusting means 38 of the tension applying mechanism 27 is actuated to bring the elastic cover 24 into the optimum tension applying state again.

(Example) Hereinafter, the Example of this invention is described based on drawing.

In the first embodiment shown in FIGS. 1 to 4, a rotary cultivator 1 has a support case 3 protruding left and right from a central gear case 2, and a transmission case 4 and a side frame 5 are fixed to outer ends of the left and right support arms 3. A side wall 6 is provided on the inner surfaces of the transmission case 4 and the side frame 5 to form a rotary machine frame 7, and the transmission case 4 and the side frame 5 allow a pawl shaft 9 having a plowing pawl 8 to rotate. I support you.

The tilling part A indicated by the rotation locus of the tilling claw 8 is covered with a cover device 11. The cover device 11 has a main cover portion B, a rear cover portion C, and an extension cover portion D, and a front cover 12 and a rear cover 13 on the left and right of them.

In the main cover portion B, 14 is an upper cover formed of an iron plate or punching metal or the like, both ends of which are attached to the left and right side walls 6, and a support frame member 15 installed on the front and rear parts of the left and right side walls 6. It is also fixed at 16,16,17.

The rear portion of the front supporting member 15 and the rear supporting member 16 are located substantially along the tilling part A, and the pressing members 18, 1 are provided between them and the upper portion of the side wall 6.
The upper part of the side elastic cover 22 is attached via 9,20.

The side elastic cover 22 is a plate-shaped member formed of rubber or synthetic resin having elasticity, and can protect the inner surfaces of the transmission case 4 and the side frame 5 from scattered soil and reduce the wear speed of the deformed claw. The front and rear covers 12, 1 project from the transmission case 4 and the side frame 5 to the front and rear.
A part of the inner surface of 3 is also covered, and the lower part thereof is attached to the transmission case 4 and the side frame 5 via the stopper 23 so that tension can be applied.

Reference numeral 24 denotes an elastic cover that substantially covers the upper part of the cultivated part A, which is a plate-like member formed of rubber or elastic synthetic resin, and its rear part includes the rear part of the rear support frame member 16 and the back support frame member 17. It is fixed to the rear support member 16 by also using the bolt 25 for fixing
An edging member 26 made of a half-folded sheet metal is fixed to the front portion thereof, and is connected to the tension applying mechanism 27 via the edging member 26.

At one or a plurality of positions in the front-rear direction of the elastic cover 24,
A backing material 28 is arranged over the entire width, and is fastened with screws 29 from the cultivated portion A side. The backing material 28 is formed of a channel material, and round bars 30 are welded to both ends thereof. This round bar 30 is a groove 19 of a holding member 19 formed of a U-shaped section material.
It is supported by a so that it can move back and forth. This backing material 2
By supporting 8 on the side wall 6, the elastic cover 24 has a circular arc shape or a trapezoidal shape protruding upward substantially along the tillage part A, and the backing material 28 is movable back and forth,
The elastic cover 24 can adjust the tension over the entire length.

The tension applying mechanisms 27 are provided one by one at the front portions of the left and right side walls 6, and an arm 33 and a lever 34 are pivotally supported by a bracket 31 fixed to each side wall 6 via a pivot 32. arm
The tip of 33 is fixed to the edging member 26, and one end of the coil spring 35 fitted on the pivot 32 is locked. The other end of the coil spring 35 is locked in the lever 34.

By rotating the lever 34 clockwise in FIG. 1,
By moving the end of the coil spring 35 in the winding direction, the spring pressure applied to the arm 33 can be increased. As a result, the elastic cover 24 applies tension in the front-rear direction intersecting the plate surface and adjusts the tension, and in order to hold the lever 34 at the adjusted position, the lever 34 and the bracket
The lock pin 36 is penetrated by 31 and. The bracket 31 is provided with a plurality of through holes 37 for the lock pins 36, so that the lever 34 can be set at a plurality of positions.

The coil spring 35 has an elastic cover even if the lever 34 is fixed.
An elastic tension is always applied to 24 in the front-rear direction intersecting the plate surface, and the lever 34, the lock pin 36, the through hole 37, and the like serve as tension adjusting means 38 for adjusting the tension.

In the first embodiment, the structure composed of the left and right side walls 6, the support frame members 15, 16, 17 and the upper cover 14 is a mounting member for mounting the elastic cover 24, and the elastic cover 24 has its front portion. Can be fixed to the mounting member and the rear part can be pulled rearward. Although the tension applying mechanism 27 is fixed to the left and right side walls 6, it can be attached to the rotary support frame 7 such as the front support frame member 15 or the support arm 3. Furthermore, the upper cover 14 does not have to be provided by force.

In the second embodiment shown in FIG. 5, the upper cover 14 is made of punching metal, and the front portion thereof has a front support frame member 15
A rear cover 41 forming a rear cover portion C is pivotally supported on a support shaft 40 supported by the rear support frame member 17 or the rear part of the left and right side walls 6 with the rear portion fixed to the lower portion of the back support frame member 17. ing.

The rear cover 41 has a V-shaped cross section, and a plurality of reinforcing ribs 42 in the width direction are attached to the upper surface of the rear cover 41.
The extension cover 44 is pivotally connected via the.

Punching metal is also formed on the rear cover 41 and the extension cover 44, and a plurality of reinforcing ribs 45 provided on the extension cover 44.
An angle setting rod 46 is connected between the rear cover 41 and the reinforcing rib 42 of the rear cover 41. A plurality of pin holes 47 are formed in the reinforcing rib 42, and the angle of the extension cover 44 with respect to the rear cover 41 can be changed by changing the pin hole 47 through which the pin 48 that connects the angle setting rod 46 penetrates.

The upper cover 14, the rear cover 41 and the extension cover 44 are covered with an elastic cover 24 'on the inner surfaces thereof (the surface on the side of the cultivating part A) to substantially cover the cultivating part A.

The elastic cover 24 'includes a rear portion of the upper cover 14 and a rear cover 41.
It is fixed to the front upper part of, and the front edging member 26F is attached to the front end.
A rear edge fitting member 26R is attached to each of the rear ends, and the trailing edge fitting member 26R is provided between the front edge fitting member 26F and the left and right side walls 6.
Tension imparting mechanisms 27F and 27R having tension adjusting means 38F and 38R are provided between and the reinforcing ribs 45 and the like.

The tension applying mechanism 27F has the same structure as that of the first embodiment, and the tension applying mechanism 27R has the arm 3 pivotally supported by the reinforcing rib 45.
The rear edge mounting member 26R is fixed to 3R, the arm 33R and the angle setting rod 46 are connected by a spring 49, and the spring 49
Depending on the elastic cover 24 'from the rear cover 41 to the extension cover
The tension is applied to the portion extending over 44, and the tension is adjusted by selecting the hole 50 in which the spring 49 is hooked to the angle setting rod 46 in the perspective direction. The plurality of holes 50 serve as tension adjusting means.

A middle portion of the elastic cover 24 'is supported by a backing material 28 and a pressing member 19 having a U-shaped cross section, and a slack portion 24a is formed between the upper cover 14 and the rear cover 41.

In the second embodiment, the structure formed by the left and right side walls 6, the supporting frame members 15 and 17, the upper cover 14, etc. serves as a mounting member for the elastic cover 24 ', and the rear cover fixed by the angle setting rod 46. The structure formed by 41, the extension cover 44, the reinforcing ribs 42, 45, etc. also constitutes a mounting member at the rear portion of the elastic cover 24 '. The elastic cover 24 'may be separated at the front and rear. Further, the upper cover 14, the rear cover 41, and the extension cover 44 use punching metal to reduce the weight,
It may be an iron plate.

(Effect of the Invention) According to the present invention described in detail above, since the elastic cover 24 covering the cultivated part A is tensioned in the front-rear direction intersecting the plate surface by the tension applying mechanism 27, the scattered soil is elasticized. Resilient by the restoring force of deformation, good crushed soil and backward feeding,
Moreover, since the adhering soil can be reliably removed, the soil adhering prevention effect can be sufficiently achieved.

Further, since the tension applying mechanism 27 is provided with the tension adjusting means 38, even if the elastic cover 24 extends, it can be re-tensioned, and moreover, it is possible to always maintain a good elastic state in accordance with the field conditions.

[Brief description of drawings]

1 to 4 show a first embodiment of the present invention. FIG. 1 is a sectional side view of an essential part, FIG. 2 is a sectional view taken along line II-II of FIG. 1, and FIG. FIG. 3 is a view on arrow III, FIG. 4 is a side view of the entire rotary cultivator, and FIG. 5 is a sectional side view showing a main part of the second embodiment. 1-Rotary tiller, 6-side wall, 7-Rotary machine frame, 11-cover device, 24-elastic cover, 26-rimming member, 27-tensioning mechanism, 28-lining material , 38 ……
Tension adjusting means, A ... Tillage section.

Claims (1)

[Claims] 1. A mounting member is attached to a rotary machine frame (7),
A cover device for a rotary cultivator in which a front and rear one side of a plate-like elastic cover (24) covering the cultivating part (A) is attached to this mounting member, wherein a edging member (26) is provided on the other side of the elastic cover (24). A tension applying mechanism for applying a tension in the front-rear direction intersecting the plate surface to the elastic cover (24) between the fixed side including the rotary machine frame (7) and the mounting member and the edging member (26). 27), and a tension adjusting mechanism (27) having a tension adjusting means (38), which is a cover device for a rotary cultivator.