JPH09308355A - Knotter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a knotter capable of preventing defect of knotting and improving operation efficiency and useful for a combine harvester, etc., by finishing rotating operation of a bill and a holder before a crank arm is previously rotated and disconnecting transmission of power to the bill and the holder. SOLUTION: A spring 31 for folding for energizing a sweeper 23 toward folding and waiting posture is fitted in a knotter and a crank arm 29 is rotated under pressure by a projection for pressurization formed in a bevel cum 25 until the crank arm 29 which receives energizing force of the spring 31 for folding advances beyond dead point and the crank arm 29 is previously rotated by utilizing an energizing force of the spring 31 for folding after the crank arm 29. In this time, rotation operation of a bill 22 and a holder 21 is completed before the crank arm 29 is previously rotated and transmission of power of the bill 22 and the holder 21 is disconnected. Furthermore, an acting arm length L of the spring 31 for folding to a connecting point of an oscillating arm of the sweeper 23 is preferably contracted in inverse proportion to the energizing force of the spring 31 for folding.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention belongs to the technical field of a binding device provided on a combine or a binder.

[0002]

2. Description of the Related Art Generally, a binding device of this type is provided with a bevel cam for rotating a building and a holder at a predetermined timing every rotation of the knot drive shaft, which is connected to a one-turn clutch. The other end of the sweeper, one end of which is connected to the swing arm, is connected to the crank arm, and the sweeper is discharged based on the rotation of the crank arm that interlocks with the bevel cam.

[0003]

By the way, a folding ammunition for urging the sweeper toward the folding standby position is provided until the crank arm receiving the urging force of the folding ammunition crosses the dead point. , The crank arm rotatable with respect to the knot drive shaft is forcibly pressed and rotated by the pressing protrusion provided on the bevel cam, and after the crank arm crosses the dead point, the biasing force of the folding ammunition (and the sweeper It is known to use the inertial force) to voluntarily rotate the crank arm in advance and release the sweeper with force, but with this type, when the crank arm rotates in advance, the bevel cam is driven. As the bevel cam rotates, the rotation speed of the bevel cam may change, resulting in a nodule defect. Was Tsu.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and has been made in order to provide a binding device which can solve these problems.
A bevel cam for rotating the building and the holder at a predetermined timing is provided on the knot drive shaft connected to the one-rotation clutch, and one end of the sweeper is connected to the swing arm. The other end is connected to a crank arm that is rotatably supported by the knot drive shaft,
A binding device for releasing a sweeper based on rotation of a crank arm interlocked with the bevel cam, wherein the binding device is provided with a folding ammunition for biasing the sweeper toward a folding standby position. Until the crank arm that receives the urging force of the machine crosses the dead point, the pressing protrusion provided on the bevel cam pushes and rotates the crank arm, and after the crank arm crosses the dead point, the urging force of the folding ammunition machine When the crank arm is rotated in advance by using, before the crank arm rotates in advance,
It completes the rotation operation of the building and the holder and cuts off the power transmission to the building and the holder. That is,
Even if you try to rotate the bevel cam when the crank arm rotates in advance, the rotation speed of the bevel cam changes because the rotation operation of the building and holder has already been completed and the power transmission to the building and holder has already been cut off. It is possible to prevent the occurrence of a nodule failure based on the above, or it is possible to prevent the inconvenience that the operation timing is changed due to the empty operation after the discharging operation.

Further, a bevel cam for rotating the building and the holder at a predetermined timing is provided on the nodal drive shaft linked to the one-rotation clutch, and one end of the nodal drive shaft is used as a swing arm. A binding device that connects the other end of the connected sweeper to a crank arm that is rotatably supported by a knot drive shaft, and discharges the sweeper based on the rotation of the crank arm that interlocks with the bevel cam. The binding device is provided with a folding ammunition that urges the sweeper toward the folding standby position, and is provided on the bevel cam until the crank arm that receives the biasing force of the folding ammunition crosses the dead point. After the crank arm presses and rotates with the projection and the crank arm has passed the dead center, the crank arm is rotated in advance by using the biasing force of the folding ammunition. Per the functional arm length of the folding for bullet machine for swinging arm connecting point of the sweeper is intended to shrink in inverse proportion to the urging force of the folding for bullet machine. In other words, until the crank arm crosses the dead center, the urging force of the folding ammunition increases as the crank arm rotates, but the working arm length of the folding ammunition with respect to the swing arm connecting point of the sweeper is increased. Since the force is reduced in inverse proportion to the biasing force of the folding ammunition, the load acting on the knot drive shaft can be reduced as much as possible, and as a result, the bevel cam rotates smoothly and the knot with good timing can be obtained. The operation can be performed.

[0006]

Next, one embodiment of the present invention will be described with reference to the drawings. In the drawings, 1 is a combine, and the combine 1 comprises a pretreatment unit 2 for cutting stems, a threshing unit 3 for threshing grains from the cut stems, and a grain selecting unit 3, A grain tank 4 for storing grains, a post-processing unit 6 for discharging the threshed culm transported by a culm feed chain 5, a crawler type traveling unit 7,
The operation section 8 is provided with various kinds of operation tools, and the post-processing section 6 has a disk-type cutter device 9 for cutting the culms and a binding device for binding the culms. 1
0 and 0 are arranged side by side. And the cutter device 9
When the cover 11 of the cutter device 9 is opened, the culm dropped from the end of the culm feed chain 5 into the cutter device 9 is cut, while when the cover 11 of the cutter device 9 is closed, The passed culm is conveyed to the bundling device 10 while receiving the root aligning action of the root aligning plate 12.

Reference numerals 13 and 14 denote binding frames which are vertically arranged side by side in a binding space.
4, a lower bundling case 15 supported by a lower bundling frame 13 has a packer 16 for scraping culms into a binding space, a door 17 for detecting a scraping pressure of scraped culms,
A one-rotation clutch (not shown) that operates based on the pressure detection of the door 17, a needle 19 and the like that winds a binding cord (not shown) around the culm bundle in association with the operation of the one-rotation clutch are attached. On the other hand, the upper binding case 20 supported by the upper binding frame 14 holds both ends of the binding cord wound by the needles 19 and cuts the binding cord at a predetermined timing. A building 22 that connects both ends and a sweeper 23 that discharges the bundle of discharged culm are attached. That is, when the culms supplied from the culm feed chain 5 are sequentially scraped by the packer 16, the door 17 retracts at the stage when the scraping pressure reaches a predetermined pressure to operate the one-rotation clutch, and the clutch is operated. Based on the needle 19 winding the binding string around the culm,
The binding string is passed to the holder 21. After the holder 21 receives the binding cord, a ring is formed on the binding cord based on the rotation operation of the building 22 and the binding cord is held from the inside of the ring.
The holder 21, which is rotated later than the building 22, cuts the binding cord at a predetermined timing. Then, when the sweeper 23 that operates in synchronization with the building 22 and the holder 21 pushes the culm bundle backward, the loop of the tying string that has come out of the building 22 in the process forms a knot, and then the culm bundle is It is designed to be released outside the aircraft.

Reference numeral 24 denotes a nodule drive shaft that makes one revolution in association with the operation of the one-rotation clutch. The bevel cam 25 provided integrally with the nodule drive shaft 24 has an input bevel gear 22a for the building 22 and the holder 21. , 21a are partially formed with driving bevel gears 25a that intermittently mesh at a predetermined timing, and the number of teeth of the driving bevel gears 25a is set to operate the building 22 and the holder 21 only one revolution each time intermittent meshing occurs. . That is, when the rotation of the knot drive shaft 24 starts in conjunction with the operation of the one-rotation clutch, the drive bevel gear 25a meshes with the input bevel gear 22a of the bill 22 at a predetermined timing and then simultaneously with the input bevel gear 21a of the holder 21. The bill 22 and the holder 21 are engaged with each other to rotate, and when the bill 22 and the holder 21 make one rotation, the rotary operation is sequentially completed.

The sweeper 23 includes a sweeper frame 23a formed in an L shape, a stocker side discharge arm 23b,
The intermediate discharge arm 23c and the tip side discharge arm 23d are integrally formed side by side.
3 (sweeper frame 23a) has a swing support shaft 2 on one end side.
6 is a fulcrum.
On the other hand, the other end of the sweeper 23 is pivotally connected to the crank arm 29 which is rotatable around the knot drive shaft 24 as a fulcrum via the connection shaft 30. Then, when the crank arm 29 is rotated in the direction of the arrow shown in the drawing, the sweeper 23 in the standby position folded upward is folded.
Makes a turning locus motion, and the discharged culm bundle is bundled on the basis of the turning locus motion.
3 one end (position near the connecting shaft 28) and the swing arm 27
The folding ammunition (tensile coil spring) 31 that urges the sweeper 23 toward the folding standby position between the base end and the
Is stretched.

Reference numerals 32 and 33 are a pair of projections projecting from one side surface of the bevel cam 25. Among the projections 32 and 33, the pressing projection 32 located on the upper side in the rotation direction of the bevel cam 25 is a knot drive shaft. While the crank arm 29 that is rotatable with respect to 2 is forcibly pressed and rotated, the regulating projection 33 located on the lower side in the rotational direction is provided with the folding ammunition 31.
The urging force (and the sweeper inertial force) restricts the excessive rotation of the crank arm 29 that has rotated ahead of the bevel cam 25. That is, the position where the straight line connecting the swing fulcrum of the swing arm 27 (the axis of the connecting shaft 28) and the crank arm connection point of the sweeper 23 (the axis of the connecting shaft 30) passes through the axis of the knot drive shaft 24. To the dead point (folding machine 3
1), the crank arm 29 is forcibly rotated against the urging force of the folding ammunition 31 until the crank arm 29 crosses the dead point.
After 9 has crossed the dead point, the crank arm 2 is utilized by utilizing the biasing force (and the sweeper inertial force) of the folding ammunition 31.
9 is voluntarily rotated in advance so that the sweeper 23 is vigorously discharged.

Now, as described above, the building 22 and the holder 2
1 and the sweeper 23 operate in synchronization with the rotation of the bevel cam 25 at predetermined timings, but before the crank arm 29 rotates in advance, the building 2
2 and the holder 21 are completely rotated, and the building 22
And the engagement timing of the drive bevel gear 25a is set so that the power transmission to the holder 21 is cut off.
In other words, the dead center crossing timing is set so that the crank arm 29 rotates in advance after the rotation operation of the building 22 and the holder 21 is completed and the power transmission to the building 22 and the holder 21 is cut off. That is, even if the bevel cam 25 is attempted to rotate along with the crank arm 29 during the preceding rotation, the rotation operation of the building 22 and the holder 21 has already been completed at that time, and the power transmission to the building 22 and the holder 21 has been cut off. Bevel cam 2
It is possible to prevent inconveniences such as the occurrence of a nodule defect due to the change in the rotation speed of No. 5 and the inconvenience that the operation timing is changed due to the idle operation after the discharge operation.

In the drawing, L is the working arm length of the folding ammunition machine 31 with respect to the swing arm connecting point of the sweeper 23 (the axis of the connecting shaft 28), and the working arm length L is
It is the distance of the perpendicular line drawn from the swing arm connecting point to the action line of the folding ammunition 31, and the product of the distance and the urging force of the folding ammunition 31 is the moment at the swing arm connecting point (the folding ammo). 31 is a force for rotating the sweeper 23 about the swing arm connection point as a fulcrum, that is, a main rotational load acting on the crank arm 29. Until the crank arm 29 crosses the dead center, the urging force of the folding ammunition 31 increases as the crank arm 29 rotates, so that the rotational load of the crank arm 29 also increases. Each connection point position is set so that the length L is reduced in inverse proportion to the urging force of the folding ammunition 31. Therefore, the load acting on the knot drive shaft 24 is reduced as much as possible, and the extension is extended. The bevel cam 25 can be smoothly rotated so that the knot operation can be performed with good timing.

In the structure constructed as described above, the position where the straight line connecting the swinging fulcrum of the swinging arm 27 and the crank arm connecting point of the sweeper 23 passes through the axis of the knot drive shaft 24 is the dead point, and the crank Until the arm 29 crosses the dead center, the crank arm 29 is forcibly rotated against the biasing force of the folding ammunition 31 and, after the crank arm 29 crosses the dead center, the folding ammunition 31 Using the urging force (and the inertia force of the sweeper) of the crank arm 29, the crank arm 29 is voluntarily rotated in advance so that the sweeper 23 is vigorously ejected. The rotation operation of the holder 21 is completed,
Moreover, since the meshing timing of the drive bevel gear 25a is set so that the power transmission to the bill 22 and the holder 21 is cut off, even if the bevel cam 25 is attempted to rotate with the crank arm 29 when the crank arm 29 rotates in advance, the bill 22 and the holder 22 will not move. As a result, it is possible to prevent the inconvenience that a defective knot is caused due to the change in the rotation speed of the bevel cam 25 without affecting the operation of the building 21. The inconvenience that goes crazy can be eliminated.

Moreover, since the working arm length L of the folding ammunition 31 with respect to the swing arm connecting point of the sweeper 23 is reduced in inverse proportion to the urging force of the folding ammunition 31, the crank arm 29 is rotated. Even if the folding ammunition 31 is energized, the load acting on the knot drive shaft 24 can be reduced as much as possible, and as a result, the bevel cam 25 can be rotated smoothly and the knot operation can be performed with good timing. It can be carried out.

[Brief description of drawings]

FIG. 1 is a perspective view of a combine.

FIG. 2 is a side view showing an arrangement state of a binding device.

FIG. 3 is a rear view of the same.

FIG. 4 is a side view showing a knot releasing mechanism of the binding device.

FIG. 5 is a rear view of the main part of the sweeper.

FIG. 6 is a side view showing a sweeper posture during standby.

FIG. 7 is a side view showing a sweeper posture when the holder is operated.

FIG. 8 is a side view showing a sweeper posture when the holder operation is completed.

FIG. 9 is a side view showing a sweeper posture immediately before a dead center is crossed.

FIG. 10 is a side view showing a sweeper posture when a dead point is crossed.

FIG. 11 is a side view showing the sweeper posture during the preceding rotation.

FIG. 12 is a side view showing a sweeper posture when the preceding rotation is restricted.

[Explanation of symbols]

 1 combine 10 binding device 16 packer 17 door 19 needle 21 holder 22 bill 23 sweeper 24 knot drive shaft 25 bevel cam 25a drive bevel gear 27 swinging arm 29 crank arm 31 folding ammunition 32 pressing protrusion 33 restriction protrusion L working arm length It

Claims (2)

[Claims] 1. A bevel cam for rotating a building and a holder at a predetermined timing every rotation of the knot drive shaft is provided on a knot drive shaft connected to a one-rotation clutch, and one end of the bevel arm is a swing arm. A binding device that connects the other end of the connected sweeper to a crank arm that is rotatably supported by a knot drive shaft, and discharges the sweeper based on the rotation of the crank arm that interlocks with the bevel cam. The binding device is provided with a folding ammunition that urges the sweeper toward the folding standby position, and is provided on the bevel cam until the crank arm that receives the biasing force of the folding ammunition crosses the dead point. After the crank arm is pressed and rotated by the protrusion and the crank arm has passed the dead center, the crank arm is rotated in advance by using the urging force of the folding ammunition. The binding device that completes the rotation operation of the building and the holder and cuts off the power transmission to the building and the holder before the crank arm rotates in advance. 2. A bevel cam for rotating the building and the holder at a predetermined timing every rotation of the knot drive shaft is provided on the knot drive shaft connected to the one-rotation clutch, and one end of the bevel cam is an oscillating arm. A binding device that connects the other end of the connected sweeper to a crank arm that is rotatably supported by a knot drive shaft, and discharges the sweeper based on the rotation of the crank arm that interlocks with the bevel cam. The binding device is provided with a folding ammunition that urges the sweeper toward the folding standby position, and is provided on the bevel cam until the crank arm that receives the biasing force of the folding ammunition crosses the dead point. After the crank arm is pressed and rotated by the protrusion and the crank arm has passed the dead center, the crank arm is rotated in advance by using the urging force of the folding ammunition. A binding device for reducing the action arm length of the folding ammunition to the swing arm connecting point of the sweeper in inverse proportion to the biasing force of the folding ammunition.