JP3325461B2 - Binding device - Google Patents

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 In general, this kind of binding device is provided with a bevel cam for rotating a building and a holder at a predetermined timing every time the knot driving shaft makes one rotation, on a knot driving shaft 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 released based on the rotation of the crank arm linked to the bevel cam.

[0003]

By the way, there is provided a folding ram for biasing the sweeper toward the folding standby position, and until the crank arm receiving the biasing force of the folding ram crosses the dead center. When the crank arm that is rotatable with respect to the knot drive shaft is forcibly pressed and rotated by a pressing projection provided on the bevel cam, and after the crank arm exceeds the dead center, the urging force (and the sweeper It is known that the crank arm is voluntarily rotated forward using inertia force to release the sweeper swiftly, but in such a case, the bevel cam is held when the crank arm rotates forward. Attempts to rotate the bevel cam may change the rotational speed, causing a nodule failure, or causing the building and holder to run idle after the ejection operation, leading to upset of the operation timing. 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 every time the knot drive shaft makes one rotation is provided on the knot drive shaft connected to the one-rotation clutch, and one end of the sweeper connected to the swing arm is provided. The other end is connected to a crank arm rotatably supported by a knot drive shaft,
A bundling device for releasing a sweeper based on rotation of a crank arm interlocked with the bevel cam, wherein the bundling device is provided with a folding ram for urging the sweeper toward a folding standby position. Until the crank arm that receives the urging force of the machine crosses the dead center, the crank arm is pressed and rotated by the pressing projection provided on the bevel cam, and after the crank arm crosses the dead center, the urging force of the folding machine In rotating the crank arm in advance by using, before the crank arm rotates in advance,
The rotation of the building and the holder is completed, and power transmission to the building and the holder is cut off. That is,
Even if the crank arm tries to rotate the bevel cam when rotating forward, the rotation of the bevel cam has already been completed and the power transmission to the building and holder has been cut off at that point, so the rotation speed of the bevel cam has changed. Or no inconvenience that the operation timing is incorrect based on the idle operation after the release operation.

A bevel cam for rotating the building and the holder at a predetermined timing each time the knot drive shaft makes one rotation is provided on the knot drive shaft connected to the one-rotation clutch, and one end of the bevel cam is provided to the swing arm. A binding device that connects the other end of the connected sweeper to a crank arm that is rotatably supported on a knot drive shaft, and that releases the sweeper based on rotation of the crank arm that interlocks with the bevel cam, The binding device is provided with a folding ram for urging the sweeper toward the folding standby position, and a pressing arm provided on the bevel cam until the crank arm receiving the biasing force of the folding ram crosses over the dead center. The crank arm is pressed and rotated by the projection, and after the crank arm has passed the dead center, the crank arm is rotated in advance using the biasing force of the folding machine 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 exceeds the dead center, the urging force of the folding machine increases as the crank arm rotates, but the working arm length of the folding machine with respect to the connecting point of the sweeper swing arm In this way, the load acting on the knot drive shaft can be reduced as much as possible because the load is reduced in inverse proportion to the urging force of the folding machine. Actuation can take place.

[0006]

Next, one embodiment of the present invention will be described with reference to the drawings. In the drawings, reference numeral 1 denotes a combine, and the combine 1 is a pre-processing unit 2 for cutting stem culms, a threshing unit 3 for threshing grains from the cut stems and culling kernels, and having been sorted. A grain tank 4 for storing grains, a post-processing unit 6 for discharging threshed culms conveyed by the culm feed chain 5, a crawler-type traveling unit 7,
The post-processing unit 6 includes a disc-type cutter device 9 for cutting the culm and a tying device for tying the culm. 1
0 are arranged in front and behind. And the cutter device 9
When the cover 11 of the cutter device 9 is opened, the culm that has fallen into the cutter device 9 from the end of the culm feed chain 5 is cut, while when the cover 11 of the cutter device 9 is closed, the upper portion of the cutter device 9 is cut off. The passed culm is conveyed to the binding device 10 while receiving the root alignment action of the root alignment plate 12.

Reference numerals 13 and 14 denote binding frames which are arranged side by side with a binding space therebetween.
4, the lower binding case 15 supported by the lower binding frame 13 includes a packer 16 for scraping the culm into the binding space, a door 17 for detecting the scraping pressure of the scraped culm,
A one-turn clutch (not shown) that operates based on the pressure detection of the door 17 and a needle 19 that winds a tying string (not shown) around the culm bundle in conjunction with the operation of the one-turn clutch are assembled. On the other hand, the upper binding case 20 supported by the upper binding frame 14 holds both ends of the binding strap wound by the needle 19 and cuts the binding strap at a predetermined timing. A building 22 for knotting both ends, a sweeper 23 for releasing a tied culm bundle, and the like are assembled. That is, when the culm supplied from the culm feed chain 5 is sequentially squeezed by the packer 16, the door 17 retreats when the squeezing pressure reaches a predetermined pressure, and the one-turn clutch is operated. While the needle 19 wraps the tying string around the culm based on
The strap is passed to the holder 21. After the holder 21 receives the binding strap, a loop is formed on the binding strap based on the rotation operation of the building 22, and the binding strap is held from the inside of the loop,
The holder 21 that rotates and operates later than the building 22 cuts the binding strap at a predetermined timing. Then, when the sweeper 23 operating in synchronization with the building 22 and the holder 21 pushes the culm bundle backward, in the process, the loop of the tying string coming out of the building 22 forms a knot, and after that, the culm bundle is It is designed to be released outside the aircraft.

Reference numeral 24 denotes a knot drive shaft which makes one rotation in conjunction with the operation of the one-rotation clutch. A bevel cam 25 provided integrally with the knot drive shaft 24 has an input bevel gear 22a of the building 22 and the holder 21. , 21a are partially formed with a drive bevel gear 25a that intermittently meshes at a predetermined timing, and the number of teeth of the drive bevel gear 25a is set to operate the building 22 and the holder 21 by one rotation each time the drive bevel gear 25a intermittently meshes. . That is, when the rotation of the knotting 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 building 22 at a predetermined timing, and then simultaneously with the input bevel gear 21a of the holder 21. The building 22 and the holder 21 are rotationally operated by meshing with each other, and the rotation operation is sequentially completed when the building 22 and the holder 21 make one rotation.

The sweeper 23 is provided with a stocker side discharge arm 23b and a sweeper frame 23a formed in an L shape.
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
6 is connected to a swing arm 27 which can swing around a fulcrum.
The other end of the sweeper 23 is pivotally connected via a connection shaft 30 to a crank arm 29 that is rotatable about a knot drive shaft 24 as a fulcrum. Then, when the crank arm 29 is rotated in the direction of the arrow shown in the drawing, the sweeper 23 is folded upward and is in the standby posture.
Makes a rotational locus motion, and the culm bundle bundled based on the rotational locus motion is released backward.
3 (a position near the connecting shaft 28) and the swing arm 27
Between the base end of the folding spring (tension coil spring) 31 for urging the sweeper 23 toward the folding standby position.
Is stretched.

Reference numerals 32 and 33 denote a pair of projections projecting from one side surface of the bevel cam 25. Of 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 driving shaft. 2 while the crank arm 29 that is rotatable with respect to the cylinder 2 is forcibly pressed and rotated, while the regulating protrusion 33 located on the lower side in the rotation direction is
With this urging force (and the sweeper inertia force), the excessive rotation of the crank arm 29 rotated ahead of the bevel cam 25 is restricted. That is, a position where a straight line connecting the swing support point of the swing arm 27 (the axis of the connection shaft 28) and the crank arm connection point of the sweeper 23 (the axis of the connection shaft 30) passes through the axis of the nodal drive shaft 24. To the dead point (insertion bullet 3
1), the crank arm 29 is forcibly rotated against the urging force of the folding machine 31 until the crank arm 29 exceeds the dead center.
After the dead center 9 has passed over the dead center, the urging force (and the sweeper inertia force) of the folding machine 31 is used to make the crank arm 2
9, the sweeper 23 is spontaneously released by the advance rotation of the sweeper 23.

As described above, the building 22, the holder 2
1 and the sweeper 23 are synchronized with the rotation of the bevel cam 25 and operate at predetermined timings, respectively, but before the crank arm 29 rotates forward, the building 2
2 and the rotation of the holder 21 are completed, 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 timing beyond the dead center is set so that the crank arm 29 rotates forward 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 crank arm 29 attempts to rotate along with the bevel cam 25 during the preceding rotation, the rotation 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. Bevelcam 2
5 can be prevented from causing a nodule failure based on the change in the rotation speed, and an inconsistency in the operation timing based on the idle operation after the release operation.

In the drawing, L is the working arm length of the folding elastic 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
The distance between the swing arm connecting point and a perpendicular line drawn to the line of action of the folding machine 31. The product of the distance and the urging force of the folding machine 31 is the moment at the swing arm connecting point (the folding machine). Reference numeral 31 denotes a force for rotating the sweeper 23 with the swing arm connecting point as a fulcrum, that is, a main rotational load acting on the crank arm 29. Until the crank arm 29 goes beyond the dead center, the more the crank arm 29 rotates, the more the urging force of the folding machine 31 increases, so that the rotational load of the crank arm 29 also increases. The position of each connection point is set so that the length L is reduced in inverse proportion to the urging force of the folding machine 31. Therefore, the load acting on the knot drive shaft 24 is reduced as much as possible, The bevel cam 25 can be smoothly rotated to perform the knot operation with good timing.

In the configuration as described above, a position where a 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 driving shaft 24 is defined as a dead center. Until the arm 29 crosses the dead center, the crank arm 29 is forcibly rotated against the urging force of the folding machine 31. After the crank arm 29 crosses the dead center, the folding machine 31 is rotated. The crank arm 29 is voluntarily rotated forward by using the urging force (and the sweeper inertia force) to release the sweeper 23 with vigor. When the rotation operation of the holder 21 is completed,
In addition, since the engagement timing of the drive bevel gear 25a is set so that the power transmission to the building 22 and the holder 21 is cut off, even if the bevel cam 25 is caused to rotate when the crank arm 29 rotates forward, the building 22 and the holder 21 does not affect the operation of the bevel cam 25. As a result, it is possible to prevent inconvenience that a nodule failure occurs based on the change in the rotation speed of the bevel cam 25. The inconvenience that goes crazy can be eliminated.

In addition, the working arm length L of the folding machine 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 machine 31, so that the rotation of the crank arm 29 is reduced. Accordingly, even if the folding machine 31 is charged, the load acting on the knot drive shaft 24 can be reduced as much as possible. As a result, the rotation of the bevel cam 25 is smoothed and the knot operation with good timing is performed. It can be carried out.

[Brief description of the drawings]

FIG. 1 is a perspective view of a combine.

FIG. 2 is a side view showing an arrangement state of the 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 a 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 the sweeper posture when the holder operation is completed.

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

FIG. 10 is a side view showing a sweeper posture at the time of passing over a dead center.

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

FIG. 12 is a side view showing a sweeper posture at the time of regulating the preceding rotation.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Combine 10 Binding device 16 Packer 17 Door 19 Needle 21 Holder 22 Building 23 Sweeper 24 Knotting drive shaft 25 Bevel cam 25a Driving bevel gear 27 Swing arm 29 Crank arm 31 Folding machine 32 Pressing projection 33 Regulation projection L Working arm length Sa

Claims (2)

(57) [Claims] A bevel cam for rotating a building and a holder at a predetermined timing each time the knot drive shaft makes one rotation is provided on a knot drive shaft connected to a one-turn clutch, and one end of the bevel cam is provided on a swing arm. A binding device that connects the other end of the connected sweeper to a crank arm that is rotatably supported on a knot drive shaft, and that releases the sweeper based on rotation of the crank arm that interlocks with the bevel cam, The binding device is provided with a folding ram for urging the sweeper toward the folding standby position, and a pressing arm provided on the bevel cam until the crank arm receiving the biasing force of the folding ram crosses over the dead center. After the crank arm is pushed and rotated by the projection and the crank arm exceeds the dead center, the crank arm is rotated ahead using the biasing force of the folding machine. A binding device that completes the rotation operation of the building and the holder and cuts off power transmission to the building and the holder before the crank arm rotates in advance. 2. A bevel cam for rotating a building and a holder at a predetermined timing each time the knot drive shaft makes one rotation is provided on a knot drive shaft connected to a one-turn clutch, and one end of the bevel cam is provided on a swing arm. A binding device that connects the other end of the connected sweeper to a crank arm that is rotatably supported on a knot drive shaft, and that releases the sweeper based on rotation of the crank arm that interlocks with the bevel cam, The binding device is provided with a folding ram for urging the sweeper toward the folding standby position, and a pressing arm provided on the bevel cam until the crank arm receiving the biasing force of the folding ram crosses over the dead center. After the crank arm is pushed and rotated by the projection and the crank arm exceeds the dead center, the crank arm is rotated ahead using the biasing force of the folding machine. A binding arm for reducing the working arm length of the folding machine to the swing arm connecting point of the sweeper in inverse proportion to the urging force of the folding machine.