JPH0860A - Waste stem cutter in combine harvester - Google Patents

Abstract

PURPOSE:To provide a waste stem cutter which can smoothly move the accepting blade from its retreating position to its working one, since the accepting blade and the through hole persistently maintain their relative position, even when they are moved to the retreating position. CONSTITUTION:Cutting blade 4 is set so that it can cut the waste stem moving along the upper face of the deck plate 1 in cooperation with the accepting blade 3. The accepting blade 3 is supported at the part 5 beneath the deck 1 so that it can move to pass through the through hole 15 over the deck 1 at the position F and come back to the retiring position E below the deck 1 and a guide face 26 is mounted beneath the lower face of the deck plate so that the movement of the blade 3 from the retiring position E to the projection can be done by its contact with the side face of the accepting blade.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is provided with a cutting blade capable of cutting culms that move along the upper surface of a deck plate in cooperation with the receiving blade, and the receiving blade penetrates the deck plate. In a state of being movable through a projecting position projecting above the deck plate through the hole and a retracted position retracting below the deck plate,
The present invention relates to a combine culm cutting device supported below the deck board.

[0002]

2. Description of the Related Art A culm cutting device for combine harvesters moves a receiving blade to a protruding position so that the cutting blade cooperates with the receiving blade to switch to a cutting state in which the culm can be cut. By moving to the retracted position, it is possible to switch to the non-cutting state where the cutting of the culm by the cutting blade is stopped, but the conventional culm cutting device has the receiving blade moved to the retracted position. The relative posture of the blade and the through hole formed in the deck board is restricted only by the support portion that movably supports the receiving blade below the deck board.

[0003]

Therefore, the relative posture between the receiving blade moved to the retracted position and the through hole formed in the deck plate is generated at a mounting position of the receiving blade to the supporting portion during long-term use. If it shifts due to rattling or distortion generated on the deck board, when moving the receiving blade from the retracted position to the projecting position, the receiving blade is likely to get caught on the back side of the peripheral edge of the through hole, and the receiving blade is retracted. There is a drawback that it is difficult to smoothly move from the position to the protruding position.

Therefore, in order to solve this drawback, it is conceivable to form a large through hole through which the receiving blade passes.
In this case, a short culm or the like that moves along the upper surface of the deck board is likely to spill down from the through hole to the lower side of the deck board.

The present invention has been made in view of the above circumstances, and by devising the structure of the lower surface side of the deck plate,
It is an object of the present invention to provide a combine culvert cutting device that facilitates smooth movement of a blade from a retracted position to a protruding position.

[0006]

The feature of the present invention for achieving the above object is to provide a cutting blade capable of cutting the culm which moves along the upper surface of the deck plate in cooperation with the receiving blade. The receiving blade is provided below the deck plate in a movable state between a projecting position projecting above the deck plate through a through hole formed in the deck plate and a retracted position retracting below the deck plate. A combine culm cutting device supported by a support part, which guides a series of movements of the receiving blade from the retracted position to the deck plate upper surface side by abutting with the receiving blade side surface. Is provided on the lower surface side of the deck board.

[0007]

The relative posture between the receiving blade moved to the retracted position and the through hole formed in the deck plate is restricted not only by the supporting portion movably supporting the receiving blade but also by the guide plate. , The relative attitude of the blade that has been moved to the retracted position and the through hole does not easily shift, and the blade is moved to the deck when the blade moves from the retracted position to the protruding position when switching from the uncut state to the cut state. It can be reliably moved to the upper surface side of the plate.

[0008]

Therefore, the receiving blade can be easily moved from the retracted position to the protruding position.

[0009]

[Examples] Fig. 1 shows a threshing device for a whole culm input type combine, including a threshing section A for threshing the cut culm sent from the feeder A1 and a sorting section B for sorting the processed products from the threshing section A. A chopper C as a culm cutting device that finely beats the culm discharged from the threshing section B is provided, and the culms cut by the chopper C are discharged to the rear part of the machine body.

The threshing section A is provided with an axial-flow type handling cylinder A3 provided with spiral handling teeth A2 and a concave A4 stretched below the handling cylinder A3. The grain culm is treated and the culm is chopper C
Is configured to be sent to.

The sorting section B is a swing sorting case B1 for sieving and sorting the leaked processed material from the concave A4, a sardines B2 for wind sorting the processed material during swing sorting, and a recovery for collecting the sorted grain. Part B3 is provided, and the dust such as the cut straws and the scraps of the sorted pieces is blown up toward the rear and discharged from the lower side of the chopper C toward the rear of the machine body.

As shown in FIGS. 2 and 3, the chopper C has a deck board 1 on which the culms sent from the threshing section A flow down toward the rear of the machine body by its own weight, and both end edges along the longitudinal direction. A strip-shaped receiving blade 3 provided with a blade portion 2 and a plurality of receiving blades 3
A support portion 5 for supporting the slab in a swingable state between a protruding position F protruding above the deck plate 1 and a retracted position E retracted below the deck plate 1, and a receiving blade 3 fixed to the protruding position F. Is provided with a cutting blade 4 that strikes the culm that moves along the upper surface of the deck board 1 in cooperation with each other, and a cutting blade shaft 6 to which the cutting blade 4 is detachably attached. It is manufactured with the same specifications as.

The cutting blade 4 is a fixture 7 provided on the cutting blade shaft 6.
Is removably attached to the base, and through holes 9 for inserting the mounting bolts 8 are provided on the base side thereof, and four cutting blades are radially attached at equal intervals in the circumferential direction. 4 are set as a set, and a plurality of sets are attached to the cutting blade shaft 6 in a state of being arranged at equal intervals in the axial direction, and the cutting blade 4 is driven by the driving rotation of the cutting blade shaft 6 by the power taken out from the threshing section A. Is rotated to strike off the culm by cooperation with the receiving blade 3.

The fixture 7 sandwiches a fixed plate 10 having a U-shaped cross section, which is welded and fixed to the peripheral surface of the cutting blade shaft 6, and a base portion of the cutting blade 4 fitted in the groove-shaped inner surface of the fixed plate 10. A mounting plate 8 to be attached is provided, and the mounting bolt 8 fixed to the fixed plate 10 is inserted through the through hole 9 of the cutting blade 4 and the through hole 12 of the mounting plate 11 to remove the cutting blade 4. The fixing plate 10 and the mounting plate 1 are regulated in the movement along the plate surface.
1, and a nut 13 is screwed to the mounting bolt 8 so as to be detachably fixed.

The supporting portion 5 is constructed by providing a receiving blade shaft member having a substantially trapezoidal cylindrical cross section, which is pivotally supported on the machine body at a position below the deck plate 1 and is swingable with respect to the machine body. The blade receiving shaft member 5 is attached to the blade receiving shaft member 5 in a comb-like shape at a constant interval in the axial direction, and at one end side of the blade receiving shaft member 5, the blade receiving shaft member 5 is swung within a certain range. An operation lever 14 capable of swinging is attached, and the swinging operation of the operation lever 14 swings the blade receiving shaft member 5 so that the blade receiving blade 3 vertically swings through a slit-shaped long hole 15 formed in the deck plate 1. Then, when the operation lever 14 is fixed at a position on one end side of the swing range, the blade 3
Is fixed to the protruding position F, the cutting blade 4 is switched to a cutting state capable of cutting the culm by cooperation with the receiving blade 3, and the operating lever 14 is fixed at the position on the other end side of the swing range, The receiving blade 3 is fixed to the retracted position E, and is switched to a non-cutting state in which the cutting blade 4 stops cutting the culm.

As shown in FIG. 4, the receiving blade 3 is inserted through a mounting long hole 16 formed in the receiving blade shaft member 5 and is detachably fixed by a retaining member 17, which prevents the retaining blade 3 from coming off. In the tool 17, a round shaft member 19 is welded to a retaining plate member 18 having a substantially L-shaped cross section which is abutted on an outer peripheral corner portion of the blade receiving shaft member 5 in a posture in which both end portions thereof project left and right from the plate surface. Each of the both ends of the round shaft member 19 is inserted into the through hole 9 of the receiving blade 3, the two receiving blades 3 are set in the retainer 17, and then the receiving blades 3 are formed. A fixing bolt 20 that is inserted into the attachment elongated hole 16 of the member 5 and is inserted into the retaining plate member 18 is screwed into a nut 21 that is fixed inside the receiving blade shaft member 5 so as to be detachably fixed.

When it is necessary to stop the operation of the chopper C because a part of the cutting blade 4 is damaged, the harvesting work is interrupted until the cutting blade 4 is replaced with a normal cutting blade 4. In particular, when the normal cutting edge 4 cannot be quickly obtained, the harvesting work is interrupted for a long period of time and the work efficiency is greatly reduced. However, in the present embodiment, the cutting edge 4 and the receiving edge 3 are Since it is manufactured with the same specifications so that it can be attached to both the cutting blade shaft 6 and the receiving blade shaft member 5, the damaged cutting blade 4 is removed from the cutting blade shaft 6 and a normal receiving blade is obtained. 3 can be detached from the receiving blade shaft member 5, and the removed receiving blade 3 can be replaced with the damaged cutting blade 4 and can be attached to the cutting blade shaft 6 in a temporary manner. Although the cutting efficiency of the culm is slightly reduced, it has the effect of promptly restarting the harvesting work.

The deck board 1 is formed of a thin metal plate, and as shown in FIG. 7, the sloped surface portion 22 on which the culms sent from the threshing section A slide down, and the cut culms are directed toward the rear of the machine body. The horizontal plane portion 23 that is pushed out is disposed flush with the inclined surface portion 2 and the slit-shaped through hole 15 that passes when the receiving blade 3 swings between the protruding position F and the retracted position E is formed.
2 and the horizontal plane portion 23.

A portion of the horizontal plane portion 23 adjacent to the inclined surface portion 22 is constructed by fixing an L-shaped plate member 24 having an L-shaped cross section, and as shown in FIG. Of the through hole 15 formed in the L-shaped plate member 24, and the peripheral edges of the horizontal plane portion of the through hole 15 formed in the L-shaped plate member 24 are successively burred toward the lower surface side of the deck plate 1 to provide the left and right guide plates 25. , The guide surfaces of the left and right guide plates 25 are sequentially guided by the contact with the left and right side surfaces on the swinging end side of the receiving blade 3 from the retracted position E of the receiving blade 3 to the upper surface side of the deck plate 1. It is formed on the possible guide surface 26 and the receiving blade 3
Is fixed to the retracted position E, the left and right side surfaces on the swinging end side of the receiving blade 3 are arranged so as to be fitted between the guide surfaces 26.

In this embodiment, the left and right guide plates 2 are provided by bending the peripheral edge of the through hole 15 on the horizontal surface side portion downward.
Since the opposing surface of 5 is formed on the guide surface 26, the receiving blade 3
When moving the retracted position E from the retracted position E to the projecting position F, the receiving blade 3 is unlikely to be caught in the through hole 15, and therefore the receiving blade 3
Not only can be smoothly moved in and out, but also through-hole 1
There is also an effect that the peripheral edge of the horizontal plane portion side of 5 can be simply reinforced, and moreover, by bending the left and right guide plates 25 in a U-shape in plan view, the peripheral edges of the horizontal plane portion side portions of the through holes 15 are bent in series. Since the bent piece 27 is provided at the rear end side portion of the body of the through hole 15, the bent piece 27 is formed even if the culm D caught on the rear end side portion of the body of the through hole 15 is bent. Compared to when not
The bent angle is small, and therefore the trapped drainage D is easily removed, so that there is an effect that the drainage is unlikely to be collected in the vicinity of the through hole 15.

[Second Embodiment] FIGS. 6 and 7 show a modification of the first embodiment, in which a through hole 15 is formed in an L-shaped plate member 24 constituting a portion of the horizontal surface portion 23 adjacent to the inclined surface portion 22. Of the through hole 15 formed in the L-shaped plate member 24, and the left and right peripheral edges of the horizontal surface side portion of the through hole 15 formed in the L-shaped plate member 24 are bent to the lower surface side of the deck plate 1 to independently provide the left and right guide plates 25. The opposite surfaces of the guide plates 25 of the left and right that can guide the movement of the receiving blade 3 from the retracted position E to the inside of the through hole 15 in series by contact with the left and right side surfaces on the swinging end side of the receiving blade 3. It is formed on the guide surface 26, and in the state where the receiving blade 3 is fixed at the retracted position E, the left and right side surfaces on the swinging end side of the receiving blade 3 are arranged so as to be fitted between the guide surfaces 26. .
Other configurations are the same as in the first embodiment.

[Third Embodiment] FIGS. 8 and 9 show a modification of the first embodiment, in which the deck plate 1 is formed in a series of sheet metal over the inclined surface portion 22 and the horizontal surface portion 23 to form a slit shape. The through hole 15 is formed across the inclined surface portion 22 and the horizontal surface portion 23.

Then, the through hole 15 is formed on the back surface of the deck surface 1.
Is welded and fixed to the L-shaped plate member 28 having an L-shaped cross section in which a portion corresponding to is cut, and the cut-out end face of the plate piece 29 projecting downward of the deck surface 1 from the retracted position E of the receiving blade 3 to the through hole 15
In a state where the receiving blade 3 is fixed to the retracted position E by forming left and right guide surfaces 26 that can guide a series of inward movements by contacting with the left and right side surfaces on the swinging end side of the receiving blade 3, Receiving blade 3
The left and right side surfaces on the swinging end side of are arranged so as to be fitted between the guide surfaces 26. Other configurations are the same as in the first embodiment.

It should be noted that reference numerals are added to the claims for convenience of comparison with the drawings, but the present invention is not limited to the configurations of the accompanying drawings by the entry.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional side view showing a main part of a combine.

FIG. 2 is a partial cross-sectional side view of a main part showing the inside of the culm cutting device (chopper).

FIG. 3 is a plan view of a main part showing the inside of a culm cutting device (chopper).

FIG. 4 is a perspective view of a main part.

FIG. 5 is a plan view of the main part

FIG. 6 is a partial cross-sectional side view of a main part showing a second embodiment.

FIG. 7 is a plan view of an essential part showing a second embodiment.

FIG. 8 is a partial cross-sectional side view of the main part showing the third embodiment.

FIG. 9 is a plan view of an essential part showing a third embodiment.

[Explanation of symbols]

 1 Deck Plate 3 Receiving Blade 4 Cutting Edge 5 Supporting Part 15 Through Hole 26 Guide Surface E Retracted Position F Projected Position

Claims (1)

[Claims] 1. A cutting blade (4) is provided which is capable of cutting the culm moving along the upper surface of the deck plate (1) in cooperation with the receiving blade (3), and the receiving blade (3) is Moves through a through hole (15) formed in the deck plate (1) to a projecting position (F) projecting above the deck plate (1) and a retracted position (E) retracting below the deck plate (1). A combine culm cutting device supported by a support portion (5) provided below the deck plate (1) in a possible state, wherein the combine blade (3) is pulled from the retracted position (E) to the retracted position (E). Displacement of the combine provided with a guide surface (26) on the lower surface side of the deck plate (1) capable of guiding the movement to the upper surface side of the deck plate (1) in series by contact with the side surface of the receiving blade (3). Cutting device.