JPS6027491B2 - Fixed structure of detachable straw cutting blade in threshing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a straw cutting blade that can be switched between an installed state in which it is inserted into the handling chamber and a state in which it is taken out from the handling chamber by insertion and removal through a hole formed in the fixed frame. The present invention relates to a fixing structure for a removable straw cutting blade in a threshing machine for holding it fixed in an attached state.

In the fixing structure of the removable straw cutting blade in such a threshing machine, the attachment structure generally has a posture in which the straw cutting blade is pressed and fixed on the back of the straw cutting blade in the above-mentioned attached state, and a pressure release that allows the straw cutting blade to be taken out. An operating cam mechanism was provided that could switch between postures. With this structure, the straw cutting blade can be fixed and held in the above-mentioned installed state by one-touch operation on the operating cam mechanism without using any tools, making it convenient to attach and detach.However, on the other hand, with this structure,
In order to firmly and firmly hold the straw cutting blade without rattling against the huge reaction force moment that acts on the straw cutting blade during the straw cutting action, the initial pressing force of the operating cam mechanism must be increased. It needs to be strong, and therefore has the drawback of requiring a tremendous amount of operating force to fix the straw cutting blade. In view of these circumstances, the present invention is capable of easily attaching and detaching with a light one-touch operation, while also being able to reliably and strongly fix and hold the straw cutting blade against the reaction force moment acting on the straw cutting blade. It has a purpose in trying to make it happen. The fixing structure of the removable straw cutting blade in the threshing machine according to the present invention is the structure explained at the beginning, and the straw cutting blade is attached to the back part of the straw cutting blade so that it can be attached to and detached from the fixed frame, and in the attached state, the straw cutting blade is attached to the back of the straw cutting blade. A member is provided that presses and fixes the cutting blade in the attached state, and a reaction force moment accompanying the straw cutting action increases the pressing force of the straw cutting blade by the pressing member between the pressing member and the fixed frame. It is characterized by having a butterfly mechanism.

That is, by providing the pinching mechanism, the reaction force moment accompanying the straw cutting action can be used to increase the pressing fixing force by the pressing member, so even if the initial pressing force by the pressing member is small, in other words For example, by simply attaching the pressing member to the fixed frame, the reaction moment can be used to increase the pressing force as the reaction moment increases, without causing the straw cutting blade to wobble due to the reaction moment. , it is possible to firmly and reliably press and fix, and therefore, the straw cutting blade can be firmly fixed and held while being easy to attach and detach.

Hereinafter, embodiments of the present invention will be described based on the drawings. FIG. 1 shows a handling ear co-rotating shaft located at the periphery of the handling chamber 3 in which the handling cylinder 3A is installed and at a location facing the handling port 38. The main part of the threshing device is shown in which a fixed frame 1 is provided which is approximately U-shaped when viewed in the core x direction, and a straw cutting blade 4 is attached to the fixed frame 1 in such a manner that it projects into the handling chamber 3.

As shown in FIG. 2 and below, the fixed frame 1 is connected to the handling chamber 3.
The straw cutting blade 4 extends between the front and rear side plates 3C and 3C', and the straw cutting blade 4 is connected to a pair of blade bodies 4A and 4A with its opposing plate portion.
They are configured to be removable from the fixed frame 1, and are provided in a plurality at appropriate intervals in the direction of the same rotation axis.

The mounting structure of the straw cutting blades 4 is such that among the opposing side plate parts IA and IB of the fixed frame 1, the straw cutting blades 4 are installed at respective locations corresponding to the installation of the straw cutting blades in one side slope part IA on the side facing the handling chamber 3. A hole 2 is formed in which the blade body 4A can be inserted and removed,
With the blade 4A protruding from the fixed frame 1 into the handling chamber 3 through this hole 2, the connecting part 48 of the straw cutting blade 4 is pressed against the one side plate part IA, thereby cutting the straw cutting blade 4. It is configured so that it can be fixed to the fixed frame 1, and the straw cutting blade 4 can be taken out when the pressure is released.

The fixing structure of the straw cutting blade 4 is detachable from the fixed frame 1 by inserting and removing it in the vertical direction. Each straw cutting blade 4...
..., and these pressing members 5.
... and the fixed frame 1 is provided with a sliding door mechanism 6 that increases the pressing force of the straw cutting blade by the pressing member 5 by the reaction force moment accompanying the straw cutting action.

The pinching mechanism 6 is arranged on the opposite slope portions IA, I of the fixed frame 1.
Of B, the press member 5 can be freely engaged with and detached from the hole 9 provided in the side plate portion IA on the side facing the handling chamber 3 as it is attached to and detached from the fixed frame 1, and the press member 5 is in the engaged state. An engaging protrusion 8 that forms a fulcrum R that swings in the insertion direction into the fixed frame 1 by the reaction moment is integrally connected to the pressing member 5, and also connects the pressing member 5 and the other side plate IB.
As the amount of insertion of the pressing member 5 into the fixed frame 1 increases as the pressing member 5 swings around the fulcrum R, the pressing member 5 is pressed toward the straw cutting blade 4 side. It is formed on the surface of the bush to be moved.

In addition, the above-mentioned pressing part village 5... group and wara kōbai 4...
... group, there is a common longest member 7 that transmits the pressing force of the pressing member 5 ... to the cutting blade 4 ....
Pressing members 5... are interposed in a mutually connected state. In FIG. 4, the pressing members 5 are arranged in the center between adjacent straw cutting blades 4, and the pressing members 5 are inserted through the longest member 7. . . . Another embodiment is shown in which the pressing force of the group is transmitted to the straw cutting blade 4 . . . group. When this is done, the elasticity of the elongated member 7 is used to press the pressing part 5... and the straw cutting edge 4...
It is possible to absorb the relative position error with...

[Brief explanation of drawings]

The drawings illustrate an embodiment of the fixing structure for the removable cutting blade in a threshing machine according to the present invention. FIG. 3 is an enlarged partially cutaway plan view of the main part, and FIG. 4 is a partially cutaway enlarged plan view of the main part showing another embodiment. 1... Fixed frame, 2... Hole, 3...
... handling room, 4 ... straw cutting blade, 5 ... pressing member, 6 ... acid mechanism, 7 ... long section village. Figure 1 Figure 2 Figure 3 Figure 4

Claims (1)

[Claims] 1. The handling chamber 3 is inserted and removed through the hole 2 formed in the fixed frame 1.
This structure is for fixing and holding the straw cutting blade 4 in the installed state, which can be switched between an installed state in which the straw cutting blade 4 is inserted into the interior and a state in which it is taken out from the handling chamber 3. , is detachable from the fixed frame 1, and
A member 5 is provided that presses and fixes the straw cutting blade 4 in the attached state in the attached state, and a reaction force moment accompanying the straw cutting action is applied between the pressing member 5 and the fixed frame 1 to press the straw cutting blade 4 into the attached state. A structure for fixing a removable straw cutting blade in a threshing machine, characterized in that a wedge mechanism 6 is configured to increase the pressing force of the straw cutting blade by a member 5. 2 The wedge mechanism 6 is connected to the opposing side plate portion 1A of the fixed frame 1.
, 1B, the press member 5 can be freely engaged and detached from the hole 9 provided in the side plate portion 1A facing the handling chamber 3 as the press member 5 is attached to and detached from the fixed frame 1, and in the engaged state, the press member 5 An engaging protrusion 8 is integrally connected to the pressing member 5, forming a fulcrum R for swinging the holder in the direction of insertion into the fixed frame 1 by the reaction force moment, and the pressing member 5 and the other side plate 1B are connected to each other. As the amount of insertion of the pressing member 5 into the fixed frame 1 increases as the pressing member 5 swings around the fulcrum R, the pressing member 5 is pressed toward the straw cutting blade 4 side. A fixing structure for a detachable straw cutting blade in a threshing machine according to claim 1, which is formed on a moving wedge surface. 3 The pressing members 5 are arranged in the center between adjacent groups of four groups of straw cutting blades arranged side by side, and have a common length that transmits the pressing force of the plurality of groups of pressing members 5 to the four groups of cutting blades of straws arranged side by side. Claim 1 in which a length member 7 is interposed between both 5 and 4.
A fixing structure for a removable straw cutting blade in a threshing machine according to item 1 or 2.