JP2000083451A - Tying device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce loads added to a door shaft and a needle-driving shaft. SOLUTION: A clutch shaft 28 separately from a door shaft 27 is disposed between the rood shaft 27 and a needle crank shaft 29. An arm 58 is fixed to the clutch shaft 28, and a fixed claw is further pivotally attached to the clutch shaft 28. When a sensitive door 38 is rotated in one direction by the energizing pressure of bundled discharged grain straws, the clutch shaft 28 is rotated through the arm 58 brought into contact with the sensitive door 38. On the basis of the rotation of the clutch shaft 28, the fixed claw 55 is swung on the clutch shaft 28 through links 64, 70. By the swinging movement of the fixed claw 55, the clutch claw 62 engaged with the fixed claw 55 is disengaged from the fixed claw 55 and then outward moved. Thus, a rotation- driving force is transmitted to the clutch claw 62, and the needle crank shaft 29 linked to the clutch claw 62 makes a turn.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a binding device in a harvester or the like for binding straws after threshing and discharging the straws to a field, and more particularly to a clutch shaft that rotates based on rotation of a sensing door. In addition, the present invention relates to a binding device that can be provided separately to operate a needle through a clutch mechanism by rotation of the clutch shaft to bind a waste straw.

[0002]

2. Description of the Related Art As shown in FIGS. 8 and 9, for example, a conventional binding device 20 for a combine has a focusing space 34 for discharging straw.
Needle portion 30 provided with door 38, needle 35, and the like provided below and a building 31 provided thereabove.
And a node 33 having a holder 32 and the like.
When a predetermined amount of the straw is converged at the convergence position in the focusing space 34, the sensing door 38 is actuated by the urging pressure of the straw.
Is rotated, and the waste straw is bound by the binding string supplied from the needle 35, and then the waste straw is discharged outside the machine by the sweeper 16 provided on the knot portion 33 side.

That is, in FIG. 8, a packer 37 is rotated by a constantly rotating packer shaft 37a, and a packer gear 36 fixed to the packer shaft 37a is rotated. The clutch gear 50 of the crankshaft 29 is constantly rotated. On the upper surface of the clutch gear 50, a projection for transmitting power to the needle crankshaft 29 when the clutch is engaged is provided. When the clutch is turned on by the action, the projection comes into contact with the clutch pawl and power is transmitted to the needle crankshaft 29 via the clutch cam. A needle 35 is joined to the needle crankshaft 29 above the needle crankshaft 29. By driving the needle 35, a tying cord is supplied to the bundled exhaust straw.

When the sensing door 38 is rotated by the urging pressure of the discharge stirrer, the fixed claw 55 (see FIG. 9) connected thereto is actuated when the clutch is engaged or disengaged. The clutch is disengaged, the clutch claw pops out, and the clutch is turned on. With this clutch on, the needle crankshaft 29 is driven, and the needle crank arm 51 and the pin 5
2. When the operating pin 54 rotates about the door shaft 27 via the link 53, the needle 35 integrated with the operating pin 54 rotates.

[0005] A sprocket is fixed below the needle crankshaft 29, and power is transmitted to the binding shaft by a chain to drive the building 31, the holder 32 and the like.

[0006]

Conventionally, however, the needle 35, the sensing door 38, the link 53, and the fixed claw 55 are fixed to a single shaft by the shaft 35, as shown in FIG. Thus, the door shaft 27 and the needle crank shaft 29
Can not be a large distance L between, Therefore large arm length R _A of the needle crank arm 51 is in Torezu, The distance R from the door shaft 27 of the actuating pin 54
_B is not large enough, and a large load acts on the door shaft 27 and the needle crankshaft 29 with respect to the operating load of the needle 35. Further, there is a problem that the operation timing of the needle 35 tends to vary, and the wear of each operating portion is sensitively affected.

The present invention has been made to solve such a problem, and an object of the present invention is to increase a link ratio when a needle is rotated around a door shaft based on rotation of a needle drive shaft. Accordingly, an object of the present invention is to provide a binding device that can reduce the load applied to the door shaft and the needle drive shaft.

[0008]

In order to achieve the above object, according to the first aspect of the present invention, there is provided a sensing door (38) rotatable about a door shaft (27) by the biasing pressure of a focused exhaust straw. And a needle drive shaft (29) rotatable via a clutch based on one-way rotation of the sensing door (38).
And a needle (35) driven based on the rotation of the needle drive shaft (29) and capable of supplying a binding string to the discharge straw, and a binding device (20) capable of binding the discharge straw with the binding strap. ), The arm is disposed between the door shaft (27) and the needle drive shaft (29);
And a clutch shaft (28) to which the clutch shaft (28) is fixed.
8) a fixed claw (55) axially mounted on the sensing door (38), based on one-way rotation of the sensing door (38).
The clutch shaft (28) is rotated via the arm (58) which comes into contact with the clutch shaft, and the fixed claw (55) is operated via the link (64, 70) based on the rotation of the clutch shaft (28). By the operation of the fixed claw (55), the engagement with the clutch claw (62) removably engaged with the fixed claw (55) is released, and the rotational driving force is transmitted to the clutch claw (62). , Wherein the needle drive shaft (29) makes one rotation.

According to a second aspect of the present invention, the sensing door (3)
The distance (S ₁ ) from the door shaft (27) to the contact point between the sensing door (38) and the arm (58) at the standby position of 8) is determined by the distance of the sensing door (38) at the falling position. The distance (S ₂ ) from the door shaft (27) to the contact point between the sensing door (38) and the arm (58) is set to be smaller.

According to a third aspect of the present invention, the sensing door (3)
8) The stopper in the return direction stop (68) is provided so that the sensing door (38) is separated from the standby position by a predetermined amount on the upstream side of the transport of the straw.

[Operation] According to the above-mentioned invention specifying matter, the binding device (20) of the present invention binds the discharged straws bundled by the tying string. The pressure causes the sensing door (38) to rotate about the door shaft (27). When the sensing door (38) rotates in one direction, the needle drive shaft (29) rotates via the clutch, and the needle drive shaft (29) rotates. The needle (35) is driven based on the rotation of 29), and the tying string is supplied to the waste straw by the needle (35).

The door shaft (27) and the needle drive shaft (2)
9), a clutch shaft (28) is disposed, and an arm (58) is fixed to the clutch shaft (28), and a fixed claw (55) is mounted on the clutch shaft (28). Then, the sensing door (3) is actuated by the biasing pressure of the collected straw.
8) When the clutch shaft (2) rotates in one direction, the arm (58) abuts on the sensing door (38).
8) is rotated, and based on the rotation of the clutch shaft (28), the fixed claw (55) is connected via the link (64, 70).
Operate around the clutch shaft (28).

When the fixed claw (55) is actuated, the clutch claw (62) engaged with the fixed claw (55) is disengaged from the fixed claw (55), and the clutch claw (62) jumps out to the outer peripheral side. Rotational driving force is transmitted to the protruding clutch pawl (62), so that the needle drive shaft (29) connected to the clutch pawl (62) makes one rotation. Further, by the rotation of the needle drive shaft (29), the needle (35) rotates around the door shaft (27), and a tying string is supplied to the waste straw to bind the waste straw.

Note that the reference numerals in parentheses described above are for the purpose of comparing the drawings, and do not limit the invention-specifying matters of the present invention at all.

[0015]

Embodiments of the present invention will be described below with reference to the drawings. Note that members that are the same as or correspond to those in the above-described conventional example are denoted by the same reference numerals and described.

FIG. 1 and FIG. 2 are a left side view and a rear view of the entirety of the binding device according to the present invention.
It is provided at the back of the combine waste cutter 22. The binding device 20 has a substantially rectangular fixed frame 21 including an upper frame 21a and a lower frame 21b which are vertically arranged at a predetermined interval, and the binding device main body 25 is supported by the fixed frame 21. I have.

The bundling device main body 25 is disposed below the discharge straw focusing space 34 and has a needle portion 30 having a sensing door 38, a needle 35, and the like that can be rotated by the urging pressure of the discharge straw. A knot 33 having a building 31, a holder 32 and the like is disposed above the space 34.

When the waste straw is sent to the bundling device 20 by the waste straw transport device 45 on the threshing unit side, the waste straw is focused on the upper surface of the deck 23 disposed below the focusing space 34 and a predetermined amount is collected. Then, the stock base aligning plate (not shown) swings in the direction of the culm of the straw to hit the stock base to align the stock base. The binding straw is supplied to the bundled waste straw from the string basket 24 by the needle 35 of the needle unit 30, and the binding shaft 47 is rotated, so that the straw is bound by the binding strap. Thereafter, the binding straw is discharged to the outside of the fuselage by the sweeper 16 provided on the knot portion 33 side.

The needle section 30 has a packer 37, a sensing door 38, a needle 35, and the like. A needle section case 39 has a door shaft 27 and a needle crank shaft 29 serving as a needle drive shaft. Are rotatably accommodated.

The needle 35 can swing about the door shaft 27. The driving force to the needle 35 is transmitted from the needle crank shaft 29 to the needle 35 via the needle crank arm 51, the pin 52 and the link 53. It acts on an operating pin 54 fixed to 35.

The power to the needle crankshaft 29 is transmitted from the cutter shaft 42 to an input pulley 44 via a belt 43, and further to the first pulley 44 via the input pulley 44.
The rotation of the first input shaft 41 is transmitted to the input shaft 41 and transmitted by a one-rotation clutch mechanism (described later) on the needle unit 30 side via a gear group.

The knot 33 is composed of the building 31 and the holder 3.
2, a sweeper 16, and the like, and a knotting case 46 houses a binding shaft 47 extending in the left-right direction of the apparatus. The rotation transmitted from the cutter shaft 42 to the first input shaft 41 is transmitted to the second input shaft 49 via the pulley 56a, the belt 57, and the pulley 56b, and further transmitted to the second input shaft 49. The rotation is transmitted to the binding shaft 47 via a gear group by a one-turn clutch mechanism (not shown) on the knot portion 33 side.

Here, the present invention has a clutch shaft, which is disposed between the door shaft 27 and the needle drive shaft 29 and has an arm fixed thereto, and a fixed claw mounted on the clutch shaft. I have.

3 and 4, a door mounting seat 59 is integrally fixed to the door shaft 27.
A clutch shaft 28 is arranged between the needle shaft 7 and the needle crankshaft 29. An arm 58 is fixed to the clutch shaft 28, and a roller 66 is attached to a shaft 67 at the tip of the arm 58. Further, a fixed claw 55 is mounted on the clutch shaft 28. On the other hand, a clutch gear 50 is loosely engaged with the needle crankshaft 29, a projection 50a is provided on the clutch gear 50, and a clutch cam 60 is fixed to the needle crankshaft 29. A clutch pawl 62 is axially mounted on the clutch cam 60 via a pin 61.

The arm 58 is connected to the clutch shaft 28.
, The clutch shaft 28 rotates,
The link 63 fixed to the clutch shaft 28 rotates about the clutch shaft 28. The rotation of the link 63 moves the pin 65 via the links 64 and 70 in the counterclockwise direction in the drawing. As a result, the fixed claw 55 pivotally attached to the pin 65 rotates in the same direction around the clutch shaft 28, and the fixed claw 55 and the clutch claw 62 are disengaged from each other. By the urging force, the clutch gear 50 jumps out toward the outer peripheral side. As a result, the clutch pawl 62 and the projection 50a of the clutch gear 50 are engaged, and the needle crankshaft 29 connected to the clutch pawl 62 makes one rotation.

That is, based on the one-way rotation of the sensing door 38, the clutch shaft 28 rotates through the arm 58 which abuts on the door mounting seat 59 of the sensing door 38, and based on the rotation of the clutch shaft 28, The clutch shaft 28
The fixed claw 55 is operated via the links 64 and 70 (see FIG. 2) by the rotation of the link 63, and the fixed claw 55 is actuated by the operation of the fixed claw 55. The engagement between the clutch pawl 62 and the fixed pawl 55 which is disengageable and disengaged is released, and a rotational driving force is transmitted to the clutch pawl 62, so that the needle crankshaft 29 makes one rotation.

The rotation of the needle crankshaft 29 is performed by rotating the needle crank arm 51 and the pin 5 as shown in FIG.
2. Acting on the operating pin 54 fixed to the needle 35 via the link 53, the needle 35 rotates around the door shaft 27 and rotates the binding shaft 47 on the node 33 one turn. Then, a binding string is supplied to the waste straw from the string basket 24 via the needle 35, and the waste straw is bound by the action of the building 31, the holder 52, and the like.

The clutch cam 60 is connected to the sensing door 3.
When the clutch cam 60 makes one rotation, the roller 69 at one end of the link 64 moves along the outer periphery of the clutch cam 60, thereby operating the link mechanism to open and close the sensing door 38. I do.

According to the present embodiment, as shown in FIG. 3, the clutch shaft 28 is disposed between the door shaft 27 and the needle crank shaft 29, and the shaft center of the clutch shaft 28 and the needle crank shaft 29 is arranged. Distance K between the conventional door shaft 27
The distance H between the axis of the door shaft 27 and the needle crankshaft 29 is made larger than the distance K while keeping the distance L between the axis of the needle crankshaft 29 and the distance L (see FIG. 8) the same. The arm length of the needle crank arm 51 and the arm length between the door shaft 27 and the operating pin 54 can be increased. Accordingly, based on the rotation of the needle crankshaft 29, the link ratio when rotating the needle 35 about the door shaft 27 is large, and the load applied to the door shaft 27 and the needle crankshaft 29 is reduced.

In the present invention, the sensing door 3
8 at the standby position, the door shaft 27 to the sensing door 3
The distance S ₁ from the contact point between the arm 8 and the arm 58 is set smaller than the distance S ₂ from the door shaft 27 to the contact point between the sensing door 38 and the arm 58 at the falling position of the sensing door 38. are doing.

FIG. 5 shows a standby state of the sensing door 38. At this time, an arm 58 integrally fixed to the clutch shaft 28 is provided at an intermediate position of a door mounting seat 59 integrally fixed to the door shaft 27. The roller 66 at the tip is in contact. Then, the distance between the door axis 27 and the contact Y at this time is S _1. From this state, a packer is attached to one side of the sensing door 38.
At 37, the waste straw is collected, and the sensing door 38 is turned around the door shaft 27 in the direction of arrow A by the collected waste straw.

FIG. 6 shows the falling state of the sensing door 38, and also at this time, similarly to the above, the sensing door 38 is integrally fixed to the clutch shaft 28 on the door mounting seat 59 integrally fixed to the door shaft 27. Although the roller 66 at the tip of the arm 58 is in contact, the roller 66 abuts on the tip of the door mounting seat 59 because the door shaft 27 and the clutch shaft 28 are displaced. The distance S _{2 from} Y ′ is the distance S ₁
Greater than.

Thus, when returning the sensing door 38 from the lying position (the state shown in FIG. 6) to the standby position (the state shown in FIG. 5), the arm 58, the roller 66,
The sensing door 38 can be pushed back to the standby position via the door mounting seat 59. Since the sensing door 38 suddenly returns from the lying position to the standby position, the shock at this time is large. However, at the start of the movement, the distance S ₂ between the door shaft 27 and the contact point Y ′ is increased. The shock load is reduced and the return speed is reduced so that the return speed increases as the sensing door 38 approaches the standby position.

Further, in the present invention, the sensing door 3
The return stop stopper 8 is provided so that the sensing door 38 is separated from the standby position by a predetermined amount on the upper side of the transport of the straw.

As shown in FIG. 7, a stop stopper 68 for the sensing door 38 is integrally provided on the door shaft 27. The stop stopper 68 stops the movement of the sensing door 38 by abutting on the clutch shaft 28 when the sensing door 38 returns from the lying position to the standby position. Then, the stop position of the sensing door 38 at this time is stopped at a position which is away from the standby position by a predetermined amount on the side closer to the discharge straw transporter.

That is, in FIG. 3 described above, when the sensing door 38 returns from the lying position to the standby position, the sensing door 38 overruns from the standby position by an angle θ due to its inertia, but this overrun occurs. Sense door 3 between
The inertia force at the time of return of the 8 is reduced.

Thus, for example, when the sensing door 38 is returned from the lying position to the standby position in a short time and at a stretch, the reaction force is large and there is a possibility that the one-turn clutch may be re-engaged by the reaction at the time of the return. As in the embodiment, the possibility of continuous binding can be prevented by reducing the inertial force when the sensing door 38 returns.

Next, the operation of the present embodiment will be described.

The waste straw conveyed from the waste straw cutter 22 to the binding device 20 is scraped into the focusing space 34 by the scraping packer on the knot portion 33 side, and then focused by the packer 37 on the needle portion 30 side. It is focused on the focusing position of the space 34.

When a predetermined amount of the straw is collected at the focusing position, the sensing door 38 is tilted rightward in FIG. 3 via the straw.

Thus, the door mounting seat 59 integrated with the sensing door 38 rotates about the door shaft 27, and the door mounting seat 59 pushes the roller 66 at the tip of the arm 58, and the roller 66 connects the clutch shaft 28. Rotate as center.

When the clutch shaft 28 rotates, the fixed claw 55 engaged with the clutch shaft 28 operates, and the fixed claw 5
5 is disengaged from the clutch pawl 62, and the clutch pawl 62 jumps out to the outer peripheral portion. Then, the clutch pawl 62 and the projection 50a of the clutch gear 50 are engaged. At this time, the clutch gear 50 is always rotating, and the clutch pawl 6
By engagement of the projection 2 with the projection 50a of the clutch gear 50, the needle crankshaft 29 connected to the clutch pawl 62 makes one rotation.

The rotation of the needle crankshaft 29 acts on the operating pin 54 fixed to the needle 35 via the needle crank arm 51, the pin 52, and the link 53,
The needle 35 rotates around the door shaft 27 and also rotates the binding shaft 47 on the node 33 side one turn. Then, a binding string is supplied from the string basket 24 to the waste straw by the needle 35, and the waste straw is bound by the action of the building 31, the holder 52, and the like.

[0044]

As described above, according to the first aspect of the present invention, the clutch shaft is disposed between the door shaft and the needle drive shaft, and the distance between the clutch shaft and the needle drive shaft is adjusted. While keeping (K) the same as the conventional distance (L) between the axis of the door shaft and the needle drive shaft, the distance (H) between the axis of the door shaft and the needle drive shaft is defined as the distance (K). The link ratio when rotating the needle around the door shaft based on the rotation of the needle drive shaft can be increased, and the load applied to the door shaft and the needle drive shaft at this time can be reduced. Can be.

Further, since the link ratio can be increased, the variation in the operation timing of the needle can be reduced even if each operating portion is worn.

According to the second aspect of the present invention, the distance (S ₁ ) from the door shaft at the standby position of the sensing door to the contact point between the sensing door and the arm is determined by the door shaft at the falling position of the sensing door. From the sensor to the contact point between the sensing door and the arm (S ₂ )
When the sensing door is returned from the lying position to the standby position, the sensing door can be returned with a large moment force about the clutch shaft.

In this case, since the sensing door suddenly returns to the standby position from the lying position and starts to return, the shock load is large, but at the beginning of the return, the distance from the door shaft to the contact point between the sensing door and the arm (S ₂ ) Is increased, the shock load is reduced and the return speed is reduced, and as the vehicle approaches the standby position, the return speed is increased because the distance (S ₁ ) from the door shaft to the contact point between the sensing door and the arm is small. can do.

According to the third aspect of the present invention, the stopper for stopping the return direction of the sensing door is provided such that the sensing door is separated from the standby position by a predetermined amount toward the side of the discharge stirrer, so that the sensing door is stopped. Since the inertia at the time of return of the sensing door is reduced during the movement of the predetermined amount, the recoil of the return of the sensing door is small, and it is possible to prevent the possibility that the one-rotation clutch mechanism is operated again due to the reaction. .

[Brief description of the drawings]

FIG. 1 is an overall side view of a binding device according to the present invention.

FIG. 2 is a rear view of the same.

FIG. 3 is an enlarged view of a main part of FIG. 1;

FIG. 4 is a view in the direction of arrows IV in FIG. 3;

FIG. 5 is a partially enlarged view of FIG. 3 when the sensing door is at a standby position.

FIG. 6 is a partially enlarged view of FIG. 3 when the sensing door is at a lying position.

FIG. 7 is a diagram showing a state when the sensing door returns from the lying position to the standby position.

FIG. 8 is an overall side view of a conventional example of a binding device.

FIG. 9 is a rear view of the same.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 20 Bundling device 25 Bundling device main body 27 Door shaft 28 Clutch shaft 29 Needle crankshaft 30 Needle part 33 Knot part 35 Needle 38 Sensing door 50 Clutch gear 51 Needle crank arm 54 Operating pin 55 Fixed claw 58 Arm 59 Door mounting seat 60 Clutch cam 62 Clutch pawl 68 Stop stopper

Claims (3)

[Claims] 1. A sensing door rotatable about a door shaft by the biasing pressure of a focused stirrer, a needle drive shaft rotatable via a clutch based on one-way rotation of the sensing door, and a needle A needle that is driven based on the rotation of the drive shaft and is capable of supplying a binding string to the discharge straw, and a binding device that can bind the discharge straw with the binding string; an intermediate portion between the door shaft and the needle drive shaft; And a clutch shaft to which an arm is fixed, and a fixed claw fixed to the clutch shaft. Based on one-way rotation of the sensing door, the arm abuts on the sensing door. When the clutch shaft rotates, the fixed claw operates via a link based on the rotation of the clutch shaft, and the engagement with the clutch claw removably disposed on the fixed claw by the operation of the fixed claw. Come off A rotational driving force is transmitted to the clutch pawl, so that the needle drive shaft makes one rotation. 2. A distance from the door shaft to a contact point between the sensing door and the arm at a standby position of the sensing door,
The binding device according to claim 1, wherein a distance from the door shaft to a contact point between the sensing door and the arm at a falling position of the sensing door is set to be smaller. 3. The binding unit according to claim 1, wherein the return stop of the sensing door is provided such that the sensing door is separated from the standby position by a predetermined amount to a position closer to the side of conveying the waste straw. apparatus.