JPH0117645B2 - - Google Patents

Description

[Detailed Description of the Invention] The needles of conventional tying machines were attached to an axis parallel to the culm direction of grain culms to be bundled, so the tying machine rotated in a plane perpendicular to the culm direction. ,
As a result, the tying portion expands greatly in the direction perpendicular to the culm direction, resulting in a disadvantage that the tying machine becomes large.

The present invention aims to downsize a tying machine by aligning the rotating surface of the needle along the culm direction of the grain culm being bundled. , the needle is supported on one side of the culm passage so as to be rotatable around an axis perpendicular to the culm direction of the focused grain culm, and the needle is traversed in a plane substantially parallel to the culm direction. It is characterized by being configured so that it can be rotated by hanging the string.

The embodiment shown in the drawings will be described below. This binding device can be applied to the straw removal speed of a binder or combine harvester, and FIGS. 1 and 2 are examples in which this is applied to a single-row binder. 1 is a cutting blade provided at the rear of the grain culm pulling body 2; 3 is a guide plate that guides the harvested grain culm to the side; 4 and 5 are guide rods, and a binding device is provided on the side thereof. .

The above-mentioned binding device has a transmission case 11 which houses an input shaft 7, a bill 8, a holder 9, and a one-rotation drive mechanism for a needle 10 at the rear of a culm passage 6 that communicates and opens outward from the side end of the cutting blade 1. A sweeper 12 is held in the transmission case, a puller 13 is provided at the front of the culm passage 6, and the puller shaft 14 is connected to the chain 15 in the chain case 15 by the input shaft 7.
A bundling chamber 1 that enters rearward from the culm passage 6 is located on the side of the building 8 and the holder 9.
6 is provided.

Γ-rotation drive device and its output part The input shaft 7 is rotatably supported by a transmission case 11, and has sprockets 17a, 17 at both upper and lower ends.
A boss 19 having two tapered pawls 18a and 18b on its upper surface is spline-fitted to the upper part of the lower sprocket 17b, and a clutch plate 20, a cam 21, and a bevel gear 22 are loosely attached to the upper part of the boss 19. It's fitted.

The clutch plate 20 has a pin 20a, a hole 20b, and a protrusion 20c.
fits into the notch 22a of the bevel gear 22, and the hole 20b
has a vertically tapered surface, and a taper pin 23 with a brake ring 23a attached thereto is inserted into the intermediate circumferential groove, and the tip of a reversal prevention pawl 24 is in contact with the protrusion 20c.

The cam plate 21 has a downwardly tapered hole 21a into which the upper end of the taper pin 23 fits, a receiving surface 21b, a recess 21c through which the pin 20a passes, and a small hole 21.
b, and both ends of a torsion spring 25 are engaged with the small hole 21d and a small hole 22b provided on the lower surface of the bevel gear 22, and the stopper 24 is loosely fitted to support the transmission case. A shaft 26 is rotatably supported by
The cam stopper 27 and the starting arm 28 that come into contact with the
The reverse prevention pawl 24 and the cam stopper 27 are pulled together by a tension spring 29, and a stopper rod 29a protruding from the transmission case 11 is exposed between them. is a sensing rod 30 facing the rear of the binding chamber 16;
is fixed with bolts 31.

Furthermore, the number of bevel gears 32 meshing with the bevel gear 22 is 24.
A needle with a Geneva gear 33 with 14 teeth cut out and 10 remaining, a plate-shaped cam 33a provided along the side of the part where the teeth are cut out, and a crank pin 34a. It is spline fitted to the drive shaft 34.

Reference numeral 35 is a binding gear in which 1/2 of the width of one tooth is cut out, and the front and rear teeth are in sliding contact with the circumferential surface of the cam 33a, and is pivotally supported by a pin 35a. The gear 35b and the gear 35c of the holder 9 mesh with each other, and the gears 35, 35b, 35c
The number of teeth is the same.

Now that the focusing amount has reached the predetermined amount, the sweeper 12
When the user pushes the sensing rod 30, the cam stopper 27 comes off from the receiving surface 21b of the cam plate 21. At that time, the taper pin 23 was fitted into the taper hole 21a of the cam plate 21 as shown in FIG. Claw boss 19
The taper pawl 18a or 18b engages, and the one-turn clutch is engaged.

As a result, the clutch plate 20, cam plate 21, bevel gears 22, 32, Geneva gear 33, and needle drive shaft 34 rotate once. At that time, the binding gear 35
does not rotate in the state shown in FIG. 6, but when the teeth of the Geneva gear 33 mesh with the bundling gear 35 at the end of the cam 33a, the bundling gear 35 rotates once, and when the rotation is completed, it is locked by the cam 33a.

When tied in this way and released by the sweeper 12 as described later, the sensing rod 30 becomes free, and the tension spring 29 pulls the sensing rod 30 and the cam stopper 27 back to their original positions, so the cam stopper 27 The cam plate 21 is received at a predetermined position, and when the taper pin 23 faces the tapered hole 21a that has rotated together with the clutch plate 20, the taper pawl 18a is pushed up and fitted into the tapered hole 21a. A one-turn clutch is disconnected.

Further, the clamping pressure of the holder 9 is adjusted by a bolt 9b that receives a spring 9a, and the bolt 9b is covered by a detachable cap 9c.

Γ Needle The base of the needle 10 is rotatably supported by a pipe 36 that is fixed to the lower part of the transmission case 11 and is parallel to the culm passage 6.
0a, and the pressing part 10b facing the upper side of the culm passage 6
The base, the arm 10a, and the pressing part 10b form a U-shape, and are located above the outside of the rotating part of the packer 13 to safely guard the rotating part and prevent wrapping. The tip part is formed in a concave part 10e just near the base of the string hole 10d.

In addition, an arm 3 protruding from the base of the needle 10
7 is connected to the crank pin 3 via the rod 37a.
4a, so when the clutch is engaged once, the needle 10 engages the string and slides.

The sprocket 14a fixed to the lower shaft of the Γ sprocket shaft 14 has 15 teeth, while the sprocket 17 of the input shaft 7 has 10 teeth, so the rotation ratio between the two is 2:3. A fulcrum pin 40 is fixed to the end of a stay 39 protruding from a cylindrical bracket erected on the upper surface of the chain case 15, and a swing arm 41 pivoted to the fulcrum pin 40.
The middle part of the gear car 13 is rotatably supported by a pin 42, and the base of the gear car 13 is connected via a bearing to a crank pin 43a that projects from the crank arm 43 of the gear car shaft 14. .

Γ Sweeper The outer side of the sweeper 12 is pivotally supported by a pin 44a standing upright at one end of a connecting rod 44, and the outer end pin 12a is connected to the transmission case 11 via a link 45.
It is connected to a pin 11a supported on the side surface.

Further, the other end of the connecting rod 44 has a hook 4 at the tip.
6a is pivotally attached to the operating arm 46 by a pin 44b, and its base is urged by a spring 47 so as to rotate in the direction in which the hook 46a protrudes.
The hook 46a is connected to the swing arm 4 above the hook 46a.
It faces a pin 41a protruding from the lower surface of 1,
Stopper 48 erected on the upper surface of the operating arm 46
is brought into contact with the back surface of the pressing part 10b of the needle 10, and the other end of the connecting rod 44 is brought into contact with the cylindrical bracket 38.
A pin 50 is inserted between the flange 38a and the receiver 38b.
It is welded to a cylinder 50 which is rotatably supported by a.

Furthermore, since the intermediate portion of the link 45 is tensioned by a tension spring 49 whose one end is fixed to the machine frame, the pins 12a, 44a, and 50a are as shown by reference numerals 12a', 44a', and 50a in FIG. The tip of the sweeper 12 faces the front of the sensing rod 30 of the one-turn clutch, and the sweeper 12', which was in the position shown by the chain line in FIG. 3, is moved to the position shown by the solid line by the focused culm pressure. When the user moves backward and pushes the sensing rod 30 to engage the one-turn clutch, and the needle 10 is engaged, the stopper 48 becomes free and the operating arm 46 is rotated counterclockwise by the spring 47, so that the hook 46a is constantly operated. The actuating arm 46 engages with the pin 41a of the swinging arm 41 that is
is pulled during the return stroke of the packer 13, so the connecting rod 44 turns around the pin 50a, and the sweeper 12 releases the bundled grain culm.

Γ Culm Guide The base of the culm guide 51 is fixed to a mounting plate 52 fixed to a pin 50a that pivotally supports the connecting rod 44,
An annular cam 53 in which the crank pin 43a is housed is also fixed to the mounting plate 52.
3 is interlocked with the needle 13, and the culm guide 51 swings while the needle 13 moves in conjunction with the needle 1.
It is configured such that the grain culm that has been raked toward the arm part 10a of 0 advances and is pushed into the bundling chamber 16 when the pack car retreats.

Incidentally, even if the culm guide 51 is not specially provided, the grain culm may be pushed into the bundling chamber 16 by its base as shown in FIG. 12e when the packer 13 returns.
In this case, it is even better if the base of the packer 13 is provided with a bulge as shown by a chain line.

Γ Knot Guide The knot guide that covers the bill 8 and the holder 9 has a guide groove 54a that guides the string supplied by the needle 10 to the bill 8, and a protrusion 55a between the bill 8 and the holder 9 on the inner surface thereof. As shown in FIG. 10a, the string held by the holder 9 moves to the back side at the beginning of the operation of the building 8 and the holder 9, and the string is held by the needle 10. The string wrapped around the culm is supplied to the holder 9 through the front side (see b in the same figure).

Even if the string comes out of the holder 9 when the building 8 rotates to clamp the string, it will not be able to hold the string on the protrusion 5.
Since it is caught by 5a, there is no chance of making a mistake in pinching the string.

Further, when the bill 8 rotates to the position d in the figure to insert the string, the holder 9 rotates and draws the string supplied by the needle 10 into the recess at the base of the protrusion 55a, and the holder 9 side is moved from there. It is moved to the back side of the string holder 55 and is in a hooked state, and in this state, the knife 9d of the holder 9 cuts the string, so the protrusion 5
5a functions as a receiving blade and can reliably cut the string regardless of the type of string or other conditions, and there is no need to make small adjustments to the holder pressure or the string brake as in the conventional case.

Γ Binding Release Timing The harvested grain culm is guided by the guide plate 3 and guide rods 4 and 5 into the raking operation range of the packer 13, and when the culm car 13 scrapes it and retreats, the culm guide 51 advances and enters the binding chamber. 16 and repeat this operation to focus.

If the starting point on the output side of the one-turn clutch is set to 0 with reference to the packer shaft 7, then the packer 13 is at position A shown in FIGS. 3 and 12a. (This point is set as 0 point in Figure 11a.) Now, when the amount of culms in the binding chamber 16 reaches a predetermined amount,
When the puller shaft 14 further rotates 60 degrees from the 0 point A, the puller 13 moves to the return stroke from point A, and the culm guide 51 is at the most backward position.

Next, when the packer shaft 14 rotates to the 180 degree position, the culm guide 51 begins to advance into the culm passage 6 as shown by the x-ray in FIG.
As shown in FIG. 2c, the focused grain culm is pushed into the bundling chamber 16, so the sweeper 12 moves backward and pushes the sensing rod 30, which causes the starting arm 28 to rotate and the cam stopper 27 to move away from the receiving surface 21b of the cam plate 21. It separates and the taper pin 23 is pushed out downward.

At that time, since the rotation ratio between the input shaft 7 and the puller shaft 14 is 3:2 as described above, the input shaft 7 rotates once while the puller shaft 14 rotates 240 degrees.
In addition, since the two taper claws 18a and 18b are provided at 180 degree intervals, each time the pin is rotated 120 degrees with respect to the pin car shaft 14, the taper claw 18a or 18b passes directly under the taper pin 23 and engages with it. is forming a chance.

In other words, the taper claw 18a or 18b can be engaged with the taper pin 23 whenever the puller 13 reaches the 0 point (however, the number of revolutions of the input shaft 7 is set to 2 of the puller shaft 14).
If you double the number, you can use one tapered claw).

Therefore, either one of the taper pawls 18a or 18b engages with the taper pin 23 protruding downward at the zero point E, which is the same as A, and the clutch plate 20 is activated, and at the same time, the needle 10 is activated, and the needle 10 is activated. is pushed toward the arm portion 10a of the needle 10 while separating it from the succeeding grain culm at its inclined portion 10c, and the pressing portion 10b ties the grain culm in the process of compressing it and pushing it toward the sweeper 12. , (the needle 10 returns at the 120 degree position), the building 8 and the holder 9 are activated at the F position (100 degree position), and the string winding and string cutting operations are completed at the K position (200 degree position).

At that time, since the needle 10 has moved away from the stopper 48 during its stringing stroke, the hook 46a of the actuating arm 46 enters the rotational trajectory of the pin 41a.
As shown in FIG. 12e, the hook 4 of the actuating arm 46
6a is hooked on and pulled by the pin 41a, the connecting rod 44 turns around the pin 50a, and the sweeper 12 pushes out the culm bundle to remove the knots and at the same time discharge it from the exit of the culm passage 6.

At the time of discharge, the connecting rod 44 facing the exit portion of the culm passage 6 receives the stock base of the discharged grain culm and makes a prepayment.

Note that when the arm 10a of the needle 10 is placed above the link 44, this arm 10a makes the initial payment.

On the other hand, when the sweeper 12 starts the discharge operation, the pressing force against the sensing rod 30 becomes 0, and the spring 29
pulls the anti-reverse claw 24 and the cam stopper 27, receives the cam plate 21, and waits at a predetermined position, so the rotating taper pin 23 fits into the tapered hole 21a, and the one-turn clutch breaks at the zero point.

On the other hand, when the ejection is completed, the needle 10 has returned to its original position, and as the puller shaft 14 rotates, the stopper 48 comes into contact with the needle 10 and releases the hook 46a from the pin 41a at the closed position. pulls the link 45 and returns the sweeper 12 to its original position.

As described above, the present invention is a tying machine equipped with a knotting section, a bundler, and a needle, in which the needle is rotated to one side of the culm passage around an axis perpendicular to the culm direction of the bundled grain culm. Since the needles are supported in such a way that they can be rotated by stringing across the culm passage in a plane substantially parallel to the culm direction, the needles can be rotated along the space occupied by the focused grain culms. This eliminates the need to protrude and rotate in the direction perpendicular to the culm as in conventional products, making it possible to significantly reduce the size of the tying section, as well as allowing it to be brought closer to the device that supplies the culm to the tying machine. It can be configured compactly.

[Brief explanation of drawings]

Fig. 1 is a plan view of the reaping and tying machine, Fig. 2 is a side view of the above, Fig. 3 is a plan view of the tying machine, Fig. 4 is a side view of the above, Fig. 5 a is a sectional view of the above, and b is a knot section. , FIG. 6 is an exploded perspective view of the one-turn clutch and its output part, FIGS. 7 and 8 are plan views of the clutch, FIG. 9 is a perspective view of the binding machine, and FIGS. 10 a and b. ，
c, d, e, f are action diagrams of the nodal part, Fig. 11 a is a timing diagram, b is a timing diagram of the conventional example, Fig. 11
Figures 2a, b, c, d, e, and f are binding action diagrams. 7... Input shaft, 10... Needle, 12... Sweeper, 13... Police car, 30... Sensing rod,
44... connecting rod, 46... operating arm, 51... culm guide, 53... annular cam, 54... knot guide, 55... string holder.

Claims (1)

[Claims] 1. In a tying machine equipped with a knotter, a bundler, and a needle, the needle is placed on one side of the culm passage,
The grain culm is supported so as to rotate around an axis perpendicular to the culm direction, and is configured to rotate across the culm passageway in a plane substantially parallel to the culm direction. The characteristic needle of the binding machine.