JPH104765A - Culm insertion mechanism of feed chain - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mechanism for preventing the distortion of the positional relationship between a culm-pressing rod and a feed chain caused by the vertical oscillation of the culm-pressing rod. SOLUTION: This mechanism is provided with stoppers 21b, 32 for restricting the change of posture from a laid waiting posture S to the hand-threshing posture by fixing the culm-pressing rod 18 to the side of the clamping rail 11 and releasing the fixed state when the posture is changed from the hand-threshing posture R to the laid waiting posture S. The laid waiting posture S is a waiting posture taken in the course of changing the posture from a hand-threshing work posture R to a normal work posture by tilting a culm-pressing rod 18 forward. The stoppers are attached to the front end of the clamping rail 11 clamping the culms together with a feed chain 9 attached to the thresher 4 in a vertically tiltable manner. The stoppers are placed between the side of the clamping rail 11 and the side of the culm-pressing rod 18 switchable between the hand-threshing work posture R to erect the rod relative to the feed chain 9 and the normal work posture to fall the front end of the rod.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grain stalk insertion mechanism in a feed chain which is mounted on a combine or the like and conveys a harvested grain culm to a threshing apparatus.

[0002]

2. Description of the Related Art On a feed chain side attached to a conventional threshing device, a grain culm holding rod supported at the front end of a holding rail for holding a grain stalk together with the feed chain is supported so as to be vertically swingable with respect to the feed chain. Provided,
The culm holding rod can be switched between a manual operation posture in which it stands with respect to the feed chain and a normal operation posture in which the front end falls down. At this time, the switching of the cereal stem holding rod to the manual operation posture is performed when the cereal stem in the state of standing upright in the falling standby posture, which is a standby posture in the middle of changing the posture from the manual operation posture to the normal operation posture. This is performed by tilting the holding rod forward so that the end is close to the front end of the holding rail. Then, the posture switching from the manual operation posture to the normal operation posture is performed after the worker temporarily switches the grain culm holding rod from the manual operation posture to the lying standby posture, and then switches the posture provided on the grain culm holding rod side. It is common to switch from a lying standby posture to a normal working state by holding a handle.

[0003]

However, it is cumbersome to switch from the manipulating work posture to the lying-standby posture once and then switch from the lying-standby posture to the normal work state, and it is difficult to handle the culm holding rod manually. Due to the possibility of swinging downward from the working posture, the worker can directly switch from the handling working posture to the normal working posture without going through the waiting standby posture with the starting end of the grain culm holding rod. there were. However, in this switching method, the force required for switching the posture is concentrated on the starting end side of the relatively thin and low rigidity of the cereal stem holding rod, and errors occur in the shape and the supporting position of the cereal stem holding rod itself, and the normal working posture is obtained. There is a drawback that the positional relationship of the cereal stem holding rod with respect to the feed chain may be lost when switching.

[0004]

In order to solve the above-mentioned problems, a grain culm insertion mechanism in a feed chain according to the present invention includes a feed chain 9 attached to a threshing device 4 and a grain culm together with the feed chain 9. Nip rail 1
1 includes a grain squeezing rod 18 that is supported at the front end so as to be vertically swingable and that can be switched between a manual operation posture R that stands up with respect to the feed chain 9 and a normal operation posture Q that causes the front end to fall down. , The sleeping standby posture S, which is a standby posture in the middle of changing the posture from the manual operation posture R to the normal operation posture Q.
The grain stem holding rod 18 in a state in which it is set up in a state where the end can be switched by tilting forward to the handling operation posture R whose end is close to the front end side of the holding rail 11, and the grain stem holding rod 18 side When the posture of the grain stalk pressing rod 18 is tilted forward to change the posture to the hand-holding work posture R between the stalk holding lever 18 and the holding rail 11 side, the grain stalk pressing rod 18 is locked to the holding rail 11 side and A mechanism for restricting the downward swing, which is a posture change from the working posture R to the normal working posture Q, and releasing the lock when the posture is switched from the manual working posture R to the lying standby posture S. The stoppers 21b, 32 are provided.

[0005]

FIG. 1 shows a combine to which the present invention is applied. A pre-processing device 3 is provided in front of the body 2 supported by the traveling device 1, and a threshing device 4 is provided further behind. The pre-processing device 3 includes a raising device 6, a grain stalk harvesting device 7, a harvested grain stalk transport device 8, and the like. , And the harvested grain culm is transported rearward by the harvested grain culm transport device 8. The harvested culm conveyed to the rear is inherited by a feed chain 9 attached to the threshing device 4 and
And threshed.

Next, the configuration around the portion of the feed chain 9 which is inherited from the harvested grain culm conveying device 8 is shown in FIG.
4 will be described with reference to FIG. A pinch rail 11 is elastically urged by a spring 12 to a feed chain 9 formed by a chain with a projection, and the tip of the cutting grain culm is held by the feed chain 9 and the pinch rail 11 in the threshing device 4. For threshing. At this time, the cut grain culm conveying device is tilted slightly downward from the feed chain 9 at a position farther than the grain squeezing action position B constituted by the front end portion 11a of the sandwiching rail 11 and the feed chain 9 so as to be lowered. A cereal stem receiving feed chain portion 9a that overlaps the rear end portion 8 in a plan view is formed.

On the other hand, a front end portion 11a of the holding rail 11 has a bottom shape in a side view and is vertically swingable. A substantially U-shaped guide rod 14 in a side view is fixed to the front of the front end 11a on the left side thereof so as to be continuous with the front end 11a, and projects leftward below the guide rod 14. The presser guide 15 is fixed. A rail base 1 supporting the clamping rail 11;
A support member 16 is fixed forward to the front end of 1b, and at the front end of the support member 16, a pressing rod case 19 for supporting the grain pressing rod 18 as will be described later is vertically moved with the rear upper end as a fulcrum. It is pivotally supported via a fulcrum shaft 17.

The support rod case 19 is provided with two support shafts 21a and 21b at predetermined intervals in the front-rear direction so as to be slidable up and down. The front support shaft 21a is urged in the X direction by a spring 22. ing. Presser rod case 19
Handle 2 from the left side obliquely downward and forward from the fulcrum shaft 17
A right end of the handle 23 projects rightward of the holding rod case 19, and a spring mounting portion 24 is integrally fixed thereto. The spring mounting portion 24 is connected via a spring 25 to a spring mounting portion 16 a provided below the fulcrum shaft 17 of the support member 16.

An engagement pin 20 is also provided at a position on the left side of the holding rod case 19 in front of and below the fulcrum shaft 17. The engagement pin 20 is provided in the state shown in FIG.
The engagement pin 20 and the guide rod 14 are separated from each other,
As described later, when the holding rod case 19 swings upward about the fulcrum shaft 17, the engaging pin 20 abuts on the lower surface of the upper end of the guide rod 14 in the middle of the movement locus of the engaging pin 20.

Next, the structure of the grain stem holding rod 18 will be described. The cereal stem holding rod 18 has a shape that follows the front shape of the feed chain 9, and has a main rod 26 whose front end is curved upward and a front end fixed in the middle of the main rod 26,
An auxiliary rod 27 (see FIG. 4) having a rear portion substantially parallel to the main rod 26 at an interval wider than the left and right widths of the sandwiching rail 11 above the main rod 26 on the grain tip side.

From the main rod 26, the mounting portion 2 is
6a and 26b are projected upward, and the mounting portion 26a is supported by the support shaft 21a, and the mounting portion 26b is supported by the main rod 26 along the grain culm receiving feed chain portion 9a in the state of FIG. Connecting fulcrums 28a, 28
It is connected (supported) via b. 2, the main rod 26 is urged by the spring 22 to the cereal stem receiving feed chain portion 9a (feed chain 9).

In the state shown in FIG. 2, the main rod 26 and the auxiliary rod 27 sandwich the front end 11a of the holding rail 11 described above and are located below the pressing guide 15 below the guide rod 14. The end of the main rod 26 is curved such that the inner surface of the end is located on an extension of the left side of the guide rod 14.

With the above configuration, the holding rod case 19 is provided.
Is swung up and down about the fulcrum shaft 17 to fall or stand with respect to the feed chain 9, so that the cereal stem pressing rod 1
8, a normal work posture Q in which the grain stem holding rod 18 shown in FIG. 2 is laid down on the feed chain 9 so as to be urged by the grain stem receiving feed chain portion 9a, and a grain stem holding rod shown in FIG. It is possible to switch to the manual handling work posture R in which the stand 18 stands with respect to the feed chain 9.

On the other hand, a plate-shaped holder 32 projects upward from the front side of the support member 16.
As shown in FIGS. 2 to 4, the holder 32 is provided with an insertion portion 33 having a vertically long slot shape on the front surface. As shown in FIGS. 3 and 4, the holder 32 is used when the holding rod case 19 is erected with respect to the feed chain 9 in order to switch the grain stem holding rod 18 to the working posture R. An insertion portion 33 is provided at a position opposite to the support shaft 21b of the holder 32 when the holding rod case 19 is in the upright state.

Here, the operation of the grain stalk pressing rod 18 in the normal working posture Q will be described. As described above, the main rod 26 of the grain culm holding rod 18 is elastically urged by the spring 22 to the grain culm receiving feed chain portion 9a of the feed chain 9, so that the grain culm conveyed by the harvested grain culm conveying device 8 is provided. Is the feed chain part 9
and is inherited by being pinched by the main rod 26.

The inherited cereal culm is held with the auxiliary rod 27 positioned above the tip side while the stem side is clamped between the cereal culm receiving feed chain 9a and the main rod 26, and the culm clamping action is performed. It is transported to the position B, but since the auxiliary rod 27 is at the aforementioned position, the tip side of the harvested cereal culm that has been inherited does not rise above the auxiliary rod 27, and when the limb is transported to the cereal culm pinching action position B The cereal stem does not get caught on the inner side surface of the holding rail 11.

Next, in order for the operator to perform a manual operation,
An operation of switching the cereal stem holding rod 18 from the normal work posture Q shown in FIG. 2 to the manual work posture R shown in FIG. 3 will be described. First, when the holding rod case 19 is swung upward around the rotation shaft 17 with the handle 23, the engaging pin 20 comes into contact with the guide rod 14 while the holding rod case 19 swings,
The engagement pin 20 moves the guide rod 14 upward, and is fixed to the front end 11a of the sandwiching rail 11, and the front end 11a of the sandwich rail 11 swings upward by the guide rod 14. Note that the front of the grain stalk clamping action position B is opened by an amount corresponding to the swing of the front end 11a.

Then, the holding rod case 19 is set up with respect to the feed chain 9 by the upward swing, so that the grain stem holding rod 18 is set up with respect to the feed chain 9 and the handling posture R And the normal standby attitude Q, a standby standby attitude S, which is a standby attitude in the middle of the attitude change, is taken.
At this time, the holding rod case 19 is swung to the position where the upper surface of the holding rod case 19 or the support shaft 21a protruding from the upper surface comes into contact with the front cover 34 that covers the front side of the threshing device 3; Is beyond the fulcrum shaft 17, the holding rod case 19 is elastically fixed by the spring 25 at the above position.

As described above, the cereal stalk pressing rod 18 in the lying standby posture S has a support shaft 21a whose X
Since it is urged in the direction and is supported by the holding rod case 19, it is supported by the holding rod case 19 by being pushed forward by the urging force. The support shafts 21a and 21b and the grain culm holding member 18 are set such that the end of the grain culling member holding rod 18 approaches the guide rod 14, which is the front end side of the holding rail 11, from this state of the grain culling holding rod 18 (downturning standby posture S). By tilting the grain stalk pressing rod 18 forward about the connecting fulcrums 28a and 28b with the rod 18, the grain stalk pressing rod 18 rises with respect to the feed chain 9 and the end thereof is close to the front end side of the holding rail 11. Is changed.

By switching the culm holding rod 18 from the standing-down standby posture S to the manual operation posture R as described above, the support shaft 2 is moved.
1b is retracted in the Y direction and protrudes rearward from the holding rod case 19, but since the insertion portion 33 of the holder 32 is provided at a position facing the supporting shaft 21b when the holding rod case 19 is standing up, the supporting shaft 21b is inserted through the insertion portion 33. That is, as described above, the insertion portion 33 is
b, and the support shaft 21b is inserted when the culm holding rod 18 is switched to the manual operation posture R, and downwardly below the cereal stem pressing rod 18 in the manual operation posture R as described later. The size is such that the swinging of the body can be restricted.

Next, an operation of swinging the holding rod case 19 downward to switch the grain stem holding rod 18 from the manual working posture R to the normal working posture Q will be described. Support shaft 21b
And the insertion portion 33 swings down the grain squeezing rod 18 in the handling operation posture R (in a state of a forward leaning posture in which the rear is close to the front end side of the holding rail 11), and the support shaft 21b and the insertion portion are rotated. 33
The upper surface of the abutment restricts the swing. That is, holder 3
2 (insertion portion 33) and the support shaft 21b engage, the support shaft 21b is inserted when the grain squeezing rod 18 swings downward from the manual handling work posture R (falling down to the normal work posture Q). Part 33
And it is impossible to directly switch the culm holding rod 18 from the manual operation posture R to the normal operation posture Q.

For this reason, the grain stem holding rod 1 in the handling posture R is
In order to swing the rod 8 downward, it is necessary to release the engagement between the holder 32 and the support shaft 21b. Moving the support shaft 21b in the Z direction (forward),
This can be performed by pulling out the support shaft 21b from the insertion portion 33 of the holder 32. That is, the engagement between the holder 32 and the support shaft 21b can be released by switching the grain stem holding rod 18 from the manual operation posture R to the lying standby posture S.

Then, as described above (by temporarily switching from the manual operation posture R to the falling standby posture S), the holder 3
After releasing the engagement between the support shaft 21b and the support shaft 21b, the holding rod case 19 is swung downward (downward) by holding the handle 23, so that the grain stem holding rod 18 is manually operated from the working posture R. The posture Q can be switched. When the holding rod case 19 is pivoted downward with the start end side of the grain stem holding rod 18 in the lying standby posture S, the support shafts 21a and 21b are turned off.
Since the connecting fulcrums 28a and 28b of the cereal stalk pressing rod 18 are located closer to the end side than the starting end side of the stalk stalk pressing rod 18, the cereal stalk pressing rod 18 is switched to the hand-handling working posture R, and The downward swing of the culm holding rod 18 (the holding rod case 19) is restricted by the engagement between the holder 32 and the support shaft 21b.

That is, it is structurally impossible to switch from the handling posture R with the starting end side of the grain stalk pressing rod 18 to the lying standby posture S depending on the positions of the connecting fulcrums 28a, 28b of the grain stalk pressing rod 18. And that it is impossible to switch from the lying-standby posture S to the normal working posture Q by holding the starting end side of the grain stalk pressing rod 18 as described above. In other words, the starting end side of the grain stalk pressing rod 18 It is not possible to switch directly from the handling work posture R to the normal work posture Q with the hand.

Therefore, as in the prior art, the normal working posture Q
, The force required for switching the posture is concentrated on the starting end side of the grain squeezing rod 18 which is relatively thin and low in rigidity, and an error occurs in the shape and the supporting position of the grain squeezing rod 18 itself. Feed chain 9 when switching to Q
The positional relationship between the grain stalk pressing rod 18 and the feed chain 9 due to the switching operation such as the positional relationship of the stalk squeezing rod 18 being out of order is eliminated, and the misalignment due to the vertical swinging of the cereal stalk pressing rod 18 is prevented. it can.

As described above, the holder 32 and the support shaft 21b
When the posture of the grain stalk pressing rod 18 is tilted forward from the falling standby posture S between the grain stalk pressing rod 18 side and the holding rail 11 side and the posture is changed to the handling operation posture R, the grain stalk pressing rod 18 is locked to the side of the holding rail 11 to restrict the change of the posture (the downward swing) from the manual operation posture R to the normal operation posture Q. The mechanism forms a stopper for the mechanism that releases the lock when switched to.

The handle 23 is located at a position relatively distant from the feed chain 9 in the holding rod case 19 regardless of whether the holding rod case 19 is in the upright state or the falling state with respect to the feed chain 9. The operator can surely and easily switch the posture of the holding rod case 19 (the cereal stem holding rod 18) at a location relatively far from the feed chain 9.

As shown in FIGS. 5 (a) and 5 (b), the holder 32 provided with the above-described insertion portion 33 is connected to the above-described threshing device 4
The holder 32 and the front cover 3 are fixed to the front cover 34 in FIG.
4 may be integrally formed. That is, the holder 32
And the support shaft 21b, a stopper may be formed between the grain culm holding rod 18 and the front cover 34 (threshing device 4) to perform the same regulation operation as described above. In addition to the effect of the holder 32, the holder 32 and the front cover 34 are integrated, so that the external appearance is improved. FIG. 5
2 (a) and 2 (b) show main parts, and FIG.
Or it is the same as FIG.

On the other hand, a straw chain (similar to the feed chain 9) for discharging the grain stem after threshing is wound around the sprocket 31 and provided behind the threshing device 4. Next, the structure (support structure) of the sprocket 31 will be described. As shown in FIG. 6, the sprocket 31 is attached at one end to a shaft-like support shaft 36 that rotatably supports the sprocket 31.
Is inserted into a support shaft holder 37 that covers the outer periphery of the support shaft 36 so as to be slidable in the αβ direction, which is the direction in which the chain rotates.

At this time, the support shaft 36 is
Is urged toward the sprocket 31 support end side (α side) by a spring 38 in contact with the end opposite to the sprocket 31 support end.
Is biased by a spring 38 in a direction (α direction) in which the straw chain is stretched. As a result, the tension of the straw chain is automatically adjusted to a predetermined force by the spring 38.

On the other hand, an insertion hole 39 penetrating into the support shaft holder 37 is provided on the outer peripheral surface of the support shaft holder 37, and a stopper 41 having a parallel pin shape is slidably inserted into the insertion hole 39. I have. At this time, the stopper 41 has one end protruding from the outer peripheral surface of the support shaft holder 37 and the other end protruding into the support shaft holder 37, and is a side sectional view provided on the outer peripheral surface of the support shaft holder 37 (FIG. 6). Are supported by a bracket 42 having a substantially U-shape.

A pin 43 protruding from the peripheral surface of the stopper 41 is provided in a portion of the stopper 41 located inside the bracket 42, and the stopper 41 is urged between the pin 43 and the bracket 42 toward the support shaft 36. A spring 44 is provided. At this time, the support shaft 3
A concave portion 46 is provided at a position facing the stopper 41 in FIG.
The stopper 41 is engaged with the concave portion 46 of the engaging portion 48 by being biased by the spring 44. Note that the protrusion 47
Is raised toward the spring 38 side (β side), and a plurality of concave portions 46 are provided in the αβ direction.

By engaging the stopper 41 with the predetermined recess 46 by the structure described above, a predetermined tension is applied to the straw chain, and the tension applied to the straw chain is generated between the stopper 41 and the recess 46. It is automatically adjusted by the spring 38 within an error range in the αβ direction. Even if a force (high load) is applied to the sprocket 31 in the β direction during the transportation of the grain stem, the movement of the support shaft 36 in the β direction is regulated by the engagement (contact) of the stopper 41 and the concave portion 46, and the sprocket 31 The position does not change more than necessary, the tension of the straw chain is always kept close to a predetermined value, and clogging of the straw culm on the straw chain side due to a decrease in the tension is prevented.

On the other hand, the change of the concave portion 46 engaged with the stopper 41 is performed by temporarily moving the stopper 41 toward the outer periphery of the support shaft holder 37 against the urging force of the spring 44 so that the engagement between the stopper 41 and the engaging portion 48 is performed. Is released, the support shaft 36 is slid in the αβ direction, and the stopper 41 is engaged with the predetermined concave portion 46, so that the operation can be easily performed. The movement of the support shaft 36 in the α direction is performed by the stopper 4
By moving the support shaft 36 by α with the engagement state of the recess 1 and the concave portion 46, the stopper 41 allows the upward support shaft 36 to move on the gentle slope of the convex portion 47 while resisting the force of the spring 44. There is no need to operate the stopper 41,
It can be done easily.

The support shaft 36 (sprocket 3) shown above
By performing the movement of 1) and engaging the stopper 41 with the concave portion 46 on the sprocket 31 side closest to the sprocket 31, replacement of the straw chain can be easily performed, and the support shaft 36 is slid in the α direction. By moving the chain and engaging the stopper 41 with the predetermined concave portion 46 on the β side of the concave portion 46, a predetermined tension can be easily applied to the chain. Note that the support shaft 36
Is configured in the support shaft holder 37 and is not exposed to the outside.

As shown in FIG. 7, in the side sectional view, the engaging portion 48 has a structure in which the serrated protrusion 51 is continuous to form the concave portion 46, and the end of the stopper 41 on the support shaft 36 side is a side sectional view. The recess 46 formed as described above in visual terms
The same effect as described above can be obtained even if the shape is inclined so as to be opposed to.

Further, as shown in FIG.
The concave portion 46a on the β side is formed by the continuation of the serrated protrusion 52 with the β side rising, the concave portion 46b on the α side is formed by the serrated projection 53 with the raised α side and the support shaft 36, and the support shaft of the stopper 41 is formed. The end on the 36 side may have the same shape as that shown in FIG. 7, and the other end of the stopper 41 may be bent in an L-shape when viewed from the front.

In this case, the stopper 41 is connected to the recess 46 on the β side.
8a, the inclination direction of the end of the stopper 41 is made to coincide with the recess 46a as shown in FIG.
When engaging with the recess 46b on the α side, as shown in FIG.
stopper 41 bent in an L-shape so as to match b.
The stopper 41 is rotated by holding the end of.

As a result, the stopper 41 is moved to the concave portion 46a.
When a force (high load) is applied in the β direction when the lever 41 is engaged, and when a force (including a force disturbed by the spring 38) is applied in the α direction when the stopper 41 is engaged with the concave portion 46b. In both cases, the stopper 41 and the recesses 46a, 4
The engagement of the stopper 6b is ensured by the contact between the stopper 41 and the recesses 46a, 46b, so that the support shaft 36 does not move by mistake. For this reason, the sprocket 31 is reliably held at each position.

As shown in FIG. 9, in place of the stopper 41 shown in FIGS. 6 to 8, one end has a shape corresponding to the concave portion 46 (formed by a series of serrated protrusions whose β side is steep). The curved plate-shaped locking member 50 is attached to the support shaft holder 37, and the bent portion 54, which is the locking portion of the locking member 50, projects from the insertion hole 39 toward the support shaft 36 and engages with the concave portion 46. It may be configured as follows. At this time, the other end of the locking member 50 is supported on the outer peripheral surface of the support shaft holder 37 by the mounting member 56,
It is urged toward the support shaft holder 37 by a spring 57.

The same effect as that shown in FIG. 6 or FIG. 7 can be obtained by the structure described above. When the support shaft 36 moves in the α direction, the locking member 5 is inclined against the force of the spring 57 to allow the support shaft 36 to move, as shown in FIG. 9B. In addition, the above structure prevents dust and the like from entering the engaging portion 48, thereby preventing a malfunction of engagement and accumulation of dust and dust on the engaging portion side.

On the other hand, as shown in FIG. 10, the mounting hole 61 of the locking member 50
It may be a long hole in the β direction. In this case, the engagement between the locking portion (curved portion 54) and the concave portion 46 and the movement of the support shaft 36 in the α direction are the same as those in FIG. 9 as shown in FIGS. However, once the locking member 50 is
The support member is moved away from the outer peripheral surface of the support shaft holder 37 against the force of the above, and then the locking member 50 is moved in the α direction so that the curved portion 54 comes into contact with the outer peripheral surface of the support shaft holder 37, thereby supporting the support shaft. Can be freely moved in the 36αβ direction.

As shown in FIG. 11, the same effect as that shown in FIG. 9 or 10 can be obtained even if the locking member 50 itself is formed of a spring material and fixed to the outer peripheral surface of the support shaft holder 37. be able to. At this time, as shown in FIG. 11B, the operation of the locking member when the support shaft 36 moves in the α direction is the same as in FIGS. 10B and 9B.

The above-described mechanism for supporting the sprocket 31 of the straw chain can also be applied to the feed chain 9 and other mechanisms for winding a chain, a belt, or the like.

[0045]

According to the present invention having the above-described configuration, the grain culling rod is switched to the hand-holding working posture by applying a downward force to the starting end side of the grain culling holding rod in the lying standby posture. In this case, after switching the culm holding rod from the manual working posture to the falling standby posture, and then holding the starting end of the culm holding rod and switching from the lying standby posture to the normal working posture, the The switching operation is not possible because the stopper is restricted from swinging (falling) downward by the stopper. In other words, it is impossible to directly switch from the manual operation posture to the normal operation posture by holding the starting end side of the grain stalk holding rod due to the downward restraint of the stopper by the stopper. The positional relationship between the stalks is eliminated, and the positional shift due to the vertical swing of the culm holding rod can be prevented.

[Brief description of the drawings]

FIG. 1 is an overall side view of a combine.

FIG. 2 is a side view of a main part of a front end portion of a feed chain in which a grain holding rod is in a normal working posture.

FIG. 3 is a side view of a main part of a front end portion of a feed chain in which a cereal stalk pressing rod is in a handling posture.

FIG. 4 is a front view of a main part in the vicinity of a grain culm holding rod in a handling posture.

FIGS. 5A and 5B are a front view and a side view of a main part near a grain culm holding rod showing another example of a stopper.

FIG. 6 is a side sectional view showing a sprocket support mechanism of the straw chain.

FIG. 7 is a side sectional view showing another example of a sprocket support mechanism of the straw chain.

FIGS. 8A and 8B are a side sectional view and a front view showing another example of a sprocket support mechanism of the straw chain, respectively, showing an engaged state.

9A is a side cross-sectional view showing another example of a sprocket support mechanism of a straw chain, and FIG. 9B is a side cross-sectional view showing the operation of a locking member when the support shaft moves. .

FIG. 10A is a plan view and a side sectional view showing another example of a sprocket support mechanism of a straw chain;
(B), (c) is sectional side elevation which showed operation | movement of the locking member at the time of a support shaft movement.

11A is a side sectional view showing another example of the sprocket support mechanism of the straw chain, and FIG. 11B is a side sectional view showing the operation of the locking member when the support shaft moves. .

[Explanation of symbols]

 4 Threshing device 9 Feed chain 11 Nipping rail 18 Grain holding rod 21b Support shaft (stopper) 32 Holder (stopper) Q Normal working posture R Hand working posture S Standing standby posture

Claims (1)

[Claims] 1. A feed chain (9) attached to a threshing device (4), and a feed rail (11) for holding a grain stalk together with the feed chain (9) is supported so as to be vertically swingable, A grain handling press rod (18) that can be switched between a handling attitude (R) standing on the chain (9) and a normal working attitude (Q) in which the front end falls down, The culm holding rod (18) in a state of standing upright in the falling standby posture (S), which is a standby posture in the middle of changing the posture from the posture (R) to the normal work posture (Q), is terminated at the holding rail (11). ) In a structure that can be switched by leaning forward to the handling posture (R) close to the front end side, a grain is provided between the grain culm holding rod (18) side and the clamping rail (11) side. Tilting the culm holding rod (18) forward to the handling posture (R) At the time of changing the posture, the grain stem holding rod (18) is locked to the holding rail (11) side and swings downward as a posture change from the hand handling work posture (R) to the normal work posture (Q). And a stopper (21) of a mechanism for releasing the lock when switching from the handling operation posture (R) to the lying standby posture (S).
b) A cereal stem insertion mechanism in a feed chain provided with (32).