JPH08116765A - Reaper - Google Patents

Abstract

(57) [Abstract] [Purpose] When the cutting clutch is in the OFF operation state, even if the raising claw comes into contact with the grain stalk before the sensor arm, the raising claw can be idle-fed with a small force. [Structure] When the aircraft is moving forward and the cutting clutch (20) is O
When the raising claw (13) contacts the grain culm before the sensor arm (26) in the FF operation state, the contact pressure from the grain culm causes the raising claw (13) to operate. Feed means (50) for moving forward and escaping
Is provided in the power transmission path connecting the raising claw (13) and the reaping clutch (20), and the raising of the raising claw (13) can be performed with a small force so that the sensor arm (26) can reliably detect the culm. .

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reaper having a cutting arm which can be controlled to be turned on and off by an automatic detection command of a grain stalk by a sensor arm and a manual operation by an operating lever. The present invention relates to an improvement in a power transmission mechanism that connects with.

[0002]

2. Description of the Related Art A grain culm cutting device is provided with a sensor arm for detecting grain culm below the starting end of a raising device, and when the machine is moving forward and the cutting clutch is in the OFF operation state, the grain culm is cut off. The raised claw near the root of the culm may come into contact with the culm before the sensor arm. This allows
In the past, this raised claw tilts the upright grain stalk diagonally, resulting in high mowing of the grain culm, or it is completely pushed down and disturbs the action of the sensor, leaving uncut grain. There was a problem.

In such a case, even if the reaping clutch is O
Even in the FF operation state, in order to allow the raising claws that come into contact with the grain cullet to escape from the grain culm, the raising chain equipped with the raising claws and the cutting chain from the raising chain through the sprocket wheel It was necessary to forcibly move the power transmission portion reaching the clutch in the operating direction, and the weight of each mechanism and the frictional force were added, and a large force was required.

In order to solve such a problem or as a conventional technique related thereto, for example, Japanese Patent Laid-Open No. 1-17
Those described in Japanese Patent No. 9619 and Japanese Utility Model Laid-Open No. 60-153938 are proposed.

In the former technique, when the sensor arm detects a grain stalk, the cutting clutch is automatically turned on, and when the switching lever is manually switched, the cutting clutch is forcibly turned on and the sensor arm is operated. To prevent foreign matter from being caught between the sensor arm and the frame.

Further, according to the latter technique, the raising device and the mowing device can be driven via the mowing clutch, and in order to drive the raising device and the mowing device when the mowing clutch is in the OFF operation state. The required load (no load) is relatively small.

[0007]

However, according to the former prior art, only the raising device always operates even when the sensor arm does not detect a grain culm and when the switching lever is manually operated. Therefore, the significance of the automatic reaping clutch is diminished, and if the raising claw comes into contact with the grain stalk before the sensor arm, the grain stalk is pushed down by the raising claw. The above problems could not be solved.

Further, according to the latter prior art, since the load required to drive the raising device is relatively small,
If the raising claw comes into contact with the grain stalk before the sensor arm when the mowing clutch is in the OFF operation state, it is relatively easy to raise the claw and allow the claw to escape. Since the load is small, there is a problem that the rotation of the cutting blade becomes heavy when the cuttings of the grain stalk come into contact with the cutting blade during cutting.

The present invention has been made in order to solve such a problem, and an object thereof is to bring the pawl raised against the grain stalk before the sensor arm while the cutting clutch is in the OFF operation state. Even if it does, it is to provide a reaper that can easily move the raising claw forward to escape.

[0010]

In order to achieve this object, the present invention provides a sensor arm (2) provided below a starting end of a raising device (14) having a grain stem raising claw (13).
When the grain culm comes into contact with 6), the sensor arm (2
6) rotates rearward about the pivot axis (28) and the cutting clutch (20) is automatically turned on, and the raising device (14), the cutting device (16) and the binding device (1).
8) A reaper configured to transmit a driving force from an engine (10) to the ON / OFF control of the reaping clutch (20) forcibly by operating an operation lever (32). At the time of forward movement of the fuselage and when the cutting clutch (20) is in the OFF operation state, when the claw (13) abuts the grain culm before the sensor arm (26), the abutment from the grain culm is performed. An idle feed means (50) for moving the retracting pawl (13) forward in its operating direction by pressure and releasing it is provided in a power transmission path connecting the retracting pawl (13) and the reaping clutch (20). Is characterized by.

The idling means (50) comprises a holding member (53) for the raising claw (13) provided on the raising chain (62) and an idle feeding groove (55), or a one-way clutch. (56, 68), and further, this one-way clutch (68) is pulled up by the chain (62).
It is characterized in that it is provided on the driving sprocket (60).

[0012]

When the grain culm is detected by the sensor arm (26) during the reaping work, the reaping clutch (20) is turned on, the reaping device (16) is driven, and the grain culm is mowed. The grain culm is transported to the rear of the machine,
In the working process, if there is a fallen grain culm by the raising device (14) arranged in front of the machine body, the raising is performed. In this manner, when the grain culm is continuously detected as the machine body advances, the raising device (14) and the cutting device (1
6) and the bundling device (18) are continuously driven to perform the same cutting as described above, but if the intervals between the grain stems are open, the sensor arm (26) does not detect the grain stems during that time. Therefore, the reaping clutch (20) is OFF
The operation state is reached, and the raising device (14) and the mowing device (1
6) and the binding device (18) are stopped.

When the front part of the machine body approaches the plucking due to the further advancement of the machine body, first, the lower part of the starting end portion of the raising device (14) comes into contact with the grain culm, and at this time, the sensor arm (26). Since the grain culm has not been detected yet, the cutting clutch (20) is in the OFF operation state. Therefore, at this time, the raising claw (1) is related to the stop position of the raising claw (13).
3) may come into contact with the culm before the sensor arm (26).

Even in such a case, according to the present invention, the idling means (5) for the raising claw (13) is provided in the power transmission path connecting the raising claw (13) and the reaping clutch (20).
Since 0) is provided, it is possible to easily cause the claws (13) to be easily fed in the operating direction by the contact pressure of the grain stems with the forward movement of the machine body and to escape. In this way, the abutting pulling claws (13) do not tilt or push down the grain culm, and thus the sensor arm (26) reliably detects the grain culm.

The reference numerals in parentheses described above are shown for reference to the drawings and do not limit the structure of the present invention.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described below with reference to the drawings.

As shown in FIG. 1, the reaper has an engine 10 and a mission case 12 mounted at the rear of the machine body, and a raising device 14, a reaper 16 and a binding device 18 at the front of the machine. Further, the raising device 14 is provided with a raising claw 13 for raising a fallen grain culm.

The raising device 14, the mowing device 16, and the bundling device 18 are connected to the engine 10 via a mowing clutch 20. Further, a grain culm introduction path 24 is formed between the dividers 22 disposed on the left and right of the front part of the machine body, and a sensor arm 26 for grain culm detection is provided below the starting end of the raising device 14. Has been. This sensor arm 26 is a cantilever-supported state in which the introduction route 2
4 is provided to project from one divider 22 side so as to be substantially orthogonal to 4, and its support side is pivotally attached by a pivot 28.

As shown in FIG. 2, when a grain culm is introduced into the introduction path 24, the grain culm contacts the sensor arm 26, and the contact pressure causes the sensor arm 26 to move rearward about the pivot 28. It is rotated (in the direction of the arrow). Further, a rod 30 is connected to the pivot 28 side of the sensor arm 26, and the rod 30 is pushed rearward of the machine body by the rearward rotation (arrow direction) of the sensor arm 26, as will be described later. Mowing clutch 2 by rearward movement of 30
0 is automatically turned on. As a result, the driving force from the engine 10 is transmitted to the raising device 14, the mowing device 16, and the binding device 18.

The reaping clutch 20 is constructed so that it can be forcibly turned ON / OFF even by operating the clutch lever 32. Further, when it is set to the "AUTO" position, depending on whether or not the grain stem is detected by the sensor arm 26. ON / OFF control is automatically performed.

Next, ON / OFF control of the reaping clutch 20 by operating the clutch lever 32 will be described.

As shown in FIGS. 3 and 4, the ON / OFF control of the reaping clutch 20 by the clutch lever 32 is performed by the expansion / contraction operation of the wire 34. That is, when the wire 34 is pulled by operating the clutch lever 32, the shaft 36 moves in the same direction as the pulling direction of the wire 34 against the urging pressure of the springs (compression) 38, 40, and is arranged in the middle of the shaft 36. By pushing the member 44 through the engaged locking piece 42a, the cam 46 is rotated clockwise around the pin 48. Then, as shown in FIG.
Set to position "F". As a result, the reaping clutch 20 is forcibly turned off.

Subsequently, when the clutch lever 32 is operated to release the tension of the wire 34, the shaft 36 moves in the returning direction of the wire 34 by the restoring force of the springs (compression) 38 and 40, and the locking piece 42b. By pushing the member 44 in the opposite direction via the, the cam 46 is rotated counterclockwise about the pin 48 and set to the “ON” position. As a result, the reaping clutch 20 is forcibly turned on.

Further, when the wire 34 is pulled a little less by operating the clutch lever 32 from this ON operation state, the shaft 36 slightly moves in the pulling direction of the wire 34 against the biasing force of the springs (compression) 38, 40. And locking piece 42
By slightly pushing the member 44 via a, the cam 46 is slightly rotated clockwise about the pin 48, and the "AUT
Set to the "O" position. As a result, the reaping clutch 20 is automatically controlled, and thereafter, ON / OFF control can be automatically performed by a detection command from the sensor arm 26.

That is, when the sensor arm 26 detects a grain culm and rotates toward the rear of the body about the pivot 28, the plate 72, the stopper 74 fixed to the plate 72 and the vertical pin 76 are integrated with the sensor arm 26. Rotate. On the other hand, on the rotation path of the stopper 74, the rod 3
No. 0 is provided at one end on the sensor arm 26 side, and the rod 30 is rotated by the rotation of the sensor arm 26.
One end contacts the vertical pin 76 and moves the rod 30 rearward. As a result, the rod 30 receives the cam 46 of the harvesting clutch 20 via the connecting pin 49 provided at the other end.
Press to rotate this cam 46 counterclockwise around the pin 48 and set it to the “ON” position. As a result, the harvesting clutch 20 is automatically turned on.

When the grain culm is exhausted, the cutting clutch 2
The cam 46 of 0 rotates clockwise around the pin 48 by the elastic force of the spring 38, whereby the cutting clutch 2
0 is set to the “OFF” position, the rod 30 is pushed forward through the connecting pin 49, and the sensor arm 26 is rotated counterclockwise by one end of the rod 30 in the opposite manner to the above. Return to the position.

Here, in the present invention, when the raising claw abuts the grain culm before the sensor arm while the machine is moving forward and the reaping clutch is in the OFF operation state, the contact pressure of the grain culm is brought into contact. Thus, an idle feeding means for moving the raising claw forward in the operating direction to escape is provided in the power transmission path connecting the raising claw and the reaping clutch.

FIG. 5 shows an embodiment of the idle feed means 50 which comprises a holding member 53 for holding the pull-up claw 13 and an idle feed groove 55 formed inside the holding member 53.

That is, the holding member 53 is fixed to the raising chain 62 at predetermined intervals, and the raising claw 13 is attached to the holding member 53. As a result, the raising claws 13 are moved when the vehicle is moving forward and the harvesting clutch 20 is in the OFF operation state.
When the abutment is brought into contact with the grain culm before the sensor arm 26, the abutment pressure from the grain culm allows the raising claw 13 to move in the idle feed groove 55 and escape in the operating direction. Moreover, at this time, the force required for idling the pull-up claw 13 is extremely small.

FIG. 6 shows an embodiment in which a one-way clutch 56 is provided in the power transmission path connecting the raising device 14 and the reaping clutch 20 as the idling means 50.

In this embodiment, the harvesting clutch 20 and the connecting shaft 52 are connected by a one-way clutch 56, and
Connect the connecting shaft 52 and the connecting shaft 54 with a bevel gear 58,
Further, the connecting shaft 54 is connected to a sprocket wheel 60 that raises the connecting shaft 54 to rotate the chain 62.

The one-way clutch 56 comprises a pair of cylindrical cams 56 'and 56 "connected to each other,
Protrusions 56a and 56b are provided on the opposite end face sides. As a result, as shown in FIG.
Is ON, the cam 56 'to the cam 56 "
The power is transmitted to the cam 56 ″, and the driving force of the cam 56 ′ is transmitted to the cam 56 ″ with the protrusions 56 a and 56 b being in contact with each other on the contact surface 64.

If the cam 56 "is to be rotated in the direction of the arrow while the harvesting clutch 20 is in the OFF operation state, the cam 56" rotates by the angle Θ and its projection 56 is rotated.
The contact surface 66 of the b abuts the projection 56a of the cam 56 '. Moreover, among the members that rotate with the cam 56 ",
Since the cam 56 'and the members inside the reaping clutch 20 are not included, a small force is sufficient.

Therefore, according to the above-described embodiment, the idling means 50 can be constituted by a simple member, and when the cutting clutch 20 is in the OFF operation state, the pulling pawl 13 is idly fed with a small force. Therefore, even if, for example, the raising claw 13 comes into contact with the grain culm before the sensor arm 26, it is possible to easily escape from the grain culm and reliably detect the grain culm by the sensor arm 26. it can.

FIG. 8 shows another embodiment of the one-way clutch. That is, the one-way clutch 6 of this embodiment
Reference numeral 8 denotes a cam 56 ″ provided on a sprocket wheel 60 for raising and rotating a chain 62, and a connecting shaft 54 having a pin 70 implanted at one end thereof.

By doing so, it is possible to perform idling at a portion closer to the raising claw 13 than the embodiment of FIG. 6, so that the raising claw 13 can be idly fed with a smaller force. You can escape.

[0037]

As described above, according to the present invention, when the raising claw comes into contact with the grain stalk, the contact pressure causes an empty space for moving the raising claw forward in its operating direction to allow it to escape. Since the feeding means is provided in the path connecting the mowing clutch and the raising claw, the mowing clutch is OFF when the machine is moving forward.
In the operating state, even when the sensor arm and the raising claw are simultaneously or when the raising claw comes into contact with the grain stalk first, the raising claw is emptied in its operating direction by the contact pressure of the grain stalk. Since it is fed, the raising claw does not knock over the grain culm, it is possible to prevent uncut or high-cutting of the grain culm, and it is possible to detect the grain culm by the sensor arm.
Moreover, the idle feeding means can be constructed with a simple structure.

[Brief description of drawings]

FIG. 1 is an overall perspective view of a reaper.

FIG. 2 is a perspective view showing the linkage of a sensor arm and a reaping clutch.

FIG. 3 is a plan view showing the linkage of a sensor arm and a reaping clutch.

FIG. 4 is a side view of FIG. 3;

FIG. 5 is a view showing an embodiment in which a holding member for a raising claw is provided with an idle feed groove.

FIG. 6 is a view showing an embodiment in which a one-way clutch is provided on a path connecting the raising device and the reaping clutch.

FIG. 7 is an explanatory diagram showing a cam engagement state.

FIG. 8 is a view showing a state in which a one-way clutch is provided near the raising chain.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 engine 12 mission case 14 raising device 16 mowing device 20 mowing clutch 26 sensor arm 32 clutch lever 50 idle feed means 52,54 connecting shaft 53 holding member 55 idle feed groove 56,68 one-way clutch 56 ', 56 "cam 56a , 56b Protrusion 58 Bevel gear 60 Sprocket wheel 62 Raising chain 64, 66 Abutment surface 70 Pin

Claims (4)

[Claims] 1. When the grain culvert comes into contact with a sensor arm provided below a starting end portion of a raising device having grain culvert raising claws, the sensor arm pivots rearward about a pivot and the cutting clutch is automatically operated. It is configured so that the driving force from the engine is transmitted to the raising device, the mowing device, and the bundling device, and the mowing clutch is forcibly turned on and off by operating the operating lever.
In a controllable reaper, when the claw is brought into contact with a grain culm before the sensor arm while the machine is moving forward and the reaping clutch is in the OFF operation state, the contact pressure from the grain culm causes A mowing machine characterized in that idle feeding means for moving the raising claw forward in its operating direction to escape is provided in a power transmission path connecting the raising claw and the reaping clutch. 2. The reaper according to claim 1, wherein the idling means comprises a holding member for a raising pawl provided on the raising chain and a groove for idling. 3. The reaper according to claim 1, wherein the idle feeding means is a one-way clutch. 4. The reaper according to claim 1, wherein the one-way clutch is provided on a drive sprocket of the raising chain.