JPH1028460A - Waste straw shredder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable satisfactory shredding of waste straw under varying feeding state of waste straw to the shredder such as the variation of the discharging rate of waste straw or the disturbance of the transfer posture of the straw by smoothly supplying waste straw from a waste straw transfer mechanism to a waste straw cutter without causing the clogging of the shredder. SOLUTION: A guide bar 16 attached to the reverse face of a cover 4 is interlocked in such a manner as to be protruded toward a waste straw transfer mechanism 2 during the shredding work keeping the cover 4 of the objective shredder 3 in opened state and retracted in a non-working state to keep the cover 4 in closed state. The motion of the guide bar 16 to be protruded into the transfer path of the waste straw transfer mechanism 2 in the state of shredding work forcibly peels and drops the waste straw transferred by the waste straw transfer mechanism into a waste straw cutter by a protruding and retracting member of the guide bar.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a straw shredder suitable for being mounted on a combine or the like, and more particularly, to a change in conditions at the time of straw supply, such as a small amount of straw or a disturbed transport posture. To a technique that enables good shredding without cutting.

[0002]

2. Description of the Related Art The above-mentioned straw shredding device is disclosed in Japanese Patent Laid-Open No. 6-253.
No. 665, which includes a straw cutter having left and right rotating blades arranged oppositely to each other and a cover for covering the upper part thereof,
When shredding is performed, the cover is opened and the straw is dropped into the straw cutter and shredded. When the shredder is not shredded, such as when united, the cover is closed so that the straw does not reach the straw cutter.

[0003]

For example, in a combine, the yield per unit time may change due to the difference in the density of cereal culms in the field, or the rotation and side-cutting. The amount of straw discharged per unit time to the shredding device at the time fluctuates. In such a case, if the threshing density is high or the lodged wet threshing, or deep handling with a long culm, the transport resistance of the tip part increases, and as a result, the transport posture in the straw transport mechanism becomes the oblique posture of the stock root advance, At the time of feeding to the shredding device, the cutter shaft and the straw culm direction are not aligned, or the posture is disturbed, or the base of the stock is placed on the open cover, causing bridging. If the straw conveying posture is disturbed, there is a disadvantage that the blade is cut obliquely or the blade slips and cannot be cut, so that the blade cannot be cut. An object of the present invention is that even if the state of supply of straw to the shredding device is deteriorated, such as an increase in the amount of straw or a disturbed conveyance posture, the straw can be smoothly supplied from the straw conveyance mechanism to the straw cutter. The point is to improve the cutting so that the cutting can be performed well without deterioration of the cutting accuracy or clogging.

[0004]

[Means for Solving the Problems]

[Structure] The present invention is characterized in that a straw cutter capable of shredding straw is arranged below the end of the straw transport mechanism, and a cover for covering the upper surface of the straw cutter is configured to be openable and closable. The work state in which the cover is opened to drop the straw conveyed by the straw into the straw cutter and shred it, and the cover to prevent the straw conveyed by the straw conveyance mechanism from being guided to the straw cutter In the straw shredding device configured to be able to appear with the closed non-working state, the cover protrudes and moves toward the straw transport mechanism in the working state with the cover open, and in the non-working state with the cover closed. A cover member is provided with a retractable member that is linked to move in and out to show the closed state, and in the working state, the projecting movement amount is set so that the retractable member extends over the transport path of the straw transport mechanism. The feature is that it is set.

In the structure of claim 1, when the cover is opened, the retractable member projects from the cover so as to protrude into the transport path of the straw transport mechanism. Even if the amount is large or if it is conveyed ahead of the stock due to bad conditions threshing, it is reliably guided to the straw cutter by the protruding retraction member, so that the In addition to eliminating the bridging caused by the stock side on the cover, the slanted posture of the stock root is corrected by contact with the retraction member, the culm body direction becomes as much as possible along the cutter axis direction, It becomes possible to approach a regular shredded posture.

[0006] Even if the straw is not separated from the straw transport mechanism and may pass the expected drop position to the straw cutter due to, for example, the straw penetrating deeply into the transport chain, in the working state, the retracting member does not move. Overhangs the transport path of the straw transport mechanism, so that the retracting member forcibly drops the straw conveyed by the straw transport mechanism onto the straw cutter, thereby ensuring that the straw does not pass through the cover. Can lead to a straw cutter. In addition, since the retracting member moves in and out of the non-working state in which the cover is closed so as not to hinder the closing state, there is no possibility that the cover does not close due to being caught with the retracting member protruding.

[Effect] As a result, due to the action of the retracting member which is protruded from the cover during the shredding operation and is linked so as to be retracted during the non-working operation, an increase in the amount of straw and disturbance in the posture during the shredding operation are caused. Even if it is, the straw that is smoothly and reliably transported by the straw transport mechanism can be sent to the straw cutter, which can prevent shredding failure and deterioration of shredding accuracy, and can close the cover without inconvenience when not working A cutting device could be provided.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows the rear part of the combine, 1 is a threshing device, 2 is a straw conveying mechanism, and 3 is a shredding device. The straw conveying mechanism 2 has a known structure in which the straw is sandwiched between a chain 8 with a projection and a guide rail 9 therebelow and is forcibly sent backward. The guide rail 9 is attached to a cylindrical main body rail 9a. The rod-shaped auxiliary rail 9b is slidably fitted inside. The auxiliary rail 9b in the shredding work state described later
Is moved forward, and the auxiliary rail 9b is moved backward in a non-shredding operation (such as a binding operation) described later.

[0009] The shredding device 3 includes a straw cutter k disposed below the end of the straw transport mechanism 2 and a straw cutter k.
And an openable / closable cover 4 that covers the upper surface of
The straw conveyed by the straw conveying mechanism 2 is used as a straw cutter k
When the shredding operation is performed with the cover 4 opened (see FIG. 2) so as to be cut into pieces, and the straw conveyed by the straw conveying mechanism 2 is not guided to the straw cutter, The non-shredding work state (see FIG. 1) in which the cover 4 is closed so as to be sent to the arranged binding device (not shown) is configured to be able to appear.

The straw cutter k is constituted by arranging a cutting blade 10 driven and rotated in the direction of arrow a and a receiving blade 11 driven and rotated in the direction of arrow b so as to slightly overlap in side view. A plurality of blades 11 are arranged in parallel with the cutting shaft 12 and a plurality of receiving blades 11 are arranged in parallel with the receiving blade shaft 13. Cut and drop to return to the field. Here, the overlapping start portion of the cutting blade 10 and the receiving blade 11 is called a shred portion s, and the straw is cut finely at the shred portion s.

The cover 4 is provided with a left-right fulcrum P at the rear.
It can swing open and close around, and can be switched between an open position O and a closed position C. On the back side of the cover 4, a plurality of guide members 14 made of a spring material for guiding straw are arranged in parallel on the left and right, and an opening / closing operation mechanism B for opening and closing the cover 4 by manual operation is provided. That is, an opening / closing operation mechanism B is configured by connecting the fan plate 4b fixed to the opening / closing shaft 4a and the opening / closing lever 20 with the operation wire 22.

As shown in FIG. 3, when the cover 4 is open, the cover 4 projects and moves toward the straw conveying mechanism 2, and when the cover 4 is closed, the cover 4 is retracted to show the closed state. A guide rod (an example of a retreating member) 16 linked by a link mechanism 15 so as to move in and out is provided on the cover 4, and the guide rod 16 forcibly removes the straw conveyed by the straw conveying mechanism 2 in a working state. In order to generate a peeling function of dropping the straw on the straw cutter k, the amount of the projecting movement of the guide rod 16 is set so as to protrude into the transport path of the straw transport mechanism.

That is, a guide rod 16 is fitted to a support member 17 attached to the inner surface of the cover 4 so as to be slidable in the surface direction of the cover 4, and is pivotally supported at a fulcrum Q by a fixed member 18 such as a side plate. A link 21 is provided at the tip of the swing arm 19 and the lower end of the guide rod 16 by a pivotal connection structure. Stay 2 attached to support shaft 4a and rotating integrally with cover 4
3 and the oscillating arm 19 are connected to the elongated hole 19a of the oscillating arm 19.
And the pin 23a at the tip of the stay are engaged with each other for interlocking connection, and the link mechanism 15 is configured as described above.

Therefore, when the cover 4 is closed, the stay 23 is closed.
Pushes down the swing arm 19, so that the guide bar 16 is pulled down via the link 21, and FIG.
In the closed state shown in (b), the guide rod 16 moves in and out within the front-rear length of the cover 4 depending on the lever ratio. When the cover 4 is opened, the stay 23 pushes up the swing arm 19, so that the guide rod 16 is pushed up via the link 21, and in the open state shown in FIG. In a state of projecting into the transport path of the straw transport mechanism 2, that is, a state in which the tip of the guide rod 16 and the transport chain 2a are vertically wrapped.

As shown in FIG. 4, the urging mechanism 24 causes the guide member 14 to swing backward when the amount of waste conveyed to the shredding device 3 increases and the pressure increases, and when the pressure decreases, the guide member 14 swings forward. It is configured to move. That is, the guide member 1
A flange 14a fixed to the upper part of the cover 4 is pivotally supported on the back surface of the cover 4 at a fulcrum X and is swingably provided, and the guide member 14 is opened downward (or forward) with respect to the cover 4 to urge it. An emission mechanism 25 is provided. Spring mechanism 25
Is provided with a winding spring 28 which penetrates a rod 27 through a U-shaped bracket 26 fixed to the back surface of the cover and projects and urges the rod 27. A fulcrum Y is provided between the tip of the rod 27 and the flange 14a. It is pivotally connected.

That is, normally, the guide member 14 is moved by the resilient mechanism 25 so that the upper portion of the flange 14a
The guide member 14 is in a position to guide the straw to the shredded portion s. Then, when the pressure due to the increase in the amount of straw acts on the guide member 14, the winding spring 28 is compressed and deformed, and the guide member 14 swings close to the cover 4 and the straw cutter k
It expands the pocket space above and prevents clogging.
In this case, the guide point by the guide member 14 is shifted rearward from the shredded portion s, but since there is a large amount of straw, the whole is still guided to the shredded portion, which is convenient.

[Another Embodiment] A cover position detecting means for detecting the opening position of the cover, and an actuator such as a geared motor for driving the guide rod 16 to move in and out are provided.
The link mechanism 15 may be configured to link and control the cover position detecting means and the actuator so that the guide rod 16 is protruded when the cover is opened, and the guide rod 16 is retracted when the cover 4 is closed.

[Brief description of the drawings]

FIG. 1 is a side view of the rear part of the combine.

FIG. 2 is a side view showing a state where a cutter cover is opened.

FIG. 3 is a side view showing a linked state between a cover and a guide rod.

FIG. 4 is a side view showing a linked state between a cover and a guide member.

[Description of Signs] 2 Waste straw transport mechanism 4 Cover 16 Retractable member k Waste straw cutter

Claims (1)

[Claims] A straw cutter capable of shredding straw is disposed below the end of the straw transport mechanism, and a cover for covering the upper surface of the straw cutter is configured to be openable and closable. An operation state in which the cover is opened to drop the conveyed straw into the straw cutter and shred it, and prevent the straw conveyed by the straw conveyance mechanism from being guided to the straw cutter. A non-working state in which the cover is closed so as to be able to appear, and in the working state in which the cover is open, the projecting movement moves toward the straw conveying mechanism, and In the non-working state in which the cover is closed, an outgoing / retracting member is provided on the cover so as to move in and out so as to show the closed state. So that the projecting / retracting member projects Straw Discharge shredding device the amount of movement is set.