JPH0118692B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an agricultural binding machine used for binding grain culms after reaping in a binder or for binding waste straw after threshing in a combine harvester.

Conventionally, this type of agricultural tying machine has a discharge arm for discharging grain bundles after tying, and is installed on the node side where the building and holder are installed, with the tying passage as a reference. , has been configured. The ejection arm provided on the nodule side in this way is not suitable for the bill and holder because the bill and holder are provided facing the binding passage and the ejection arm is driven from the nodule drive shaft. and the knot drive shaft, and are supported at a position far away from the binding passage.

In the agricultural binding machine having the above structure, the discharge arm inevitably becomes large. In other words, since the discharge arm pushes and releases the bundled grain culm bundles from the upstream side of the binding passage, the discharge arm, which is supported at a position far from the binding passage as described above, pushes the grain bundles in the binding passage from the upstream side. The length must be able to protrude into the binding path as required at the tip end, resulting in a large size. Naturally, a large amount of power is required to rotate such a large and heavy discharge arm.

In this respect, for example, as disclosed in Japanese Patent Publication No. 49-26332, a door that is provided on the opposite side of the binding passageway from the knotting part and receives grain culms at the end of the binding passageway also serves as a release arm. Agricultural binding machines with a similar structure reduce power consumption because the door that also serves as the release arm is made small, but on the other hand,
It has the following defects. In other words, in the agricultural binding machine with the above structure, a pair of doors that also serve as release arms are installed on the door shaft, with the phase shifted by 180 degrees from each other, and the door shaft is rotated half a turn during one rotation of the clutch shaft, so that one door can handle grains. A structure is adopted in which the culm bundle is pushed and released, and as shown in the above-mentioned publication, a complex-shaped partial gear is used to rotate the door shaft by half a rotation for each rotation of the clutch shaft. Machining such partial gears is not easy, so they have the disadvantage of high production costs.

The purpose of this invention is to reduce the size of the ejection arm, thereby reducing the power consumption for driving the ejection arm, and therefore the capacity of the engine mounted on the binder, etc.
To provide a new agricultural tying machine which does not use a complex-shaped and expensive partial gear to drive a discharge arm.

The configuration of the agricultural binding machine according to the present invention will be explained with reference to the illustrated embodiment.
1 is a binding case for an agricultural binding machine, and this binding case 1 has a packer shaft 3, a clutch shaft 4, and a door shaft 5 on one side of a binding passage 2, and a knot drive shaft 6 on the other side. They are supported in parallel and rotatable. A packer 7 for pushing grain culms into the binding passage 2 is provided with its base end supported by a pin 9 on a rotational support arm 8 supported by a clutch shaft 4. Further, a door 10 for receiving grain culms at the end of the bundling passage 2 is provided with its base end fixed to the door shaft 5. The needle 13 supplies the tying string, one end of which is held by the holder 11 of the knot, to the bill 12 of the knot, and then supplies the string so that the new end of the string is held by the holder 11. A boss at the end of the arm portion 13a is fitted onto the door shaft 5, and the arm portion 13a is rotatably supported around the door shaft 5.

Above police car 7, door 10 and needle 13
The arrangement is as usual, but in the illustrated binding machine, a discharge arm 1 for discharging the bundled grain culm bundles is used.
4 is provided on the opposite side of the binding passage 2 from the knot, that is, on the side where the packer 7, door 10 and needle 13 are installed. As clearly shown in FIG. 4, the discharge arm 14 is formed of a suitably curved plate, and a boss 14a having a vertical width smaller than that of the main body is fixed to one end of the discharge arm 14. In the illustrated case, the door shaft 5 supported by the binding case 1 near the binding passage 2 is used as a vertical fulcrum shaft for the discharge arm 14, and the boss 14a at the end of the discharge arm 14 is connected to the door shaft 5. The discharge arm 14 is fitted onto the upper end via a bearing sleeve 15, and is supported by the door shaft 5 so as to be rotatable around the door shaft 5.

The packer shaft 3 is also used as an input shaft, and an input sprocket wheel 16 is fitted onto the packer shaft 3 outside the binding case 1. The packer shaft 3 has a gear 17 inside the binding case 1.
A clutch gear 18 meshed with this gear 17 is loosely fitted onto the clutch shaft 4. A clutch cam 19 is also fixedly installed on the upper side of the clutch gear 18 at an appropriate distance on the clutch shaft 4, and a door 10 is provided between the clutch gear 18 and the clutch cam 19 as usual.
A binding clutch 20 is provided which is engaged by sensing the pressing force against the clutch gear 18 and the clutch cam 19 to interlock the clutch gear 18 and the clutch cam 19 to rotate the clutch shaft 4 once. In the figure, 21 is a clutch arm supported on the Packer shaft 3 so as to be rotatable around the shaft 3, and 22 is a spring receiver similarly supported on the Packer shaft 3 so as to be rotatable around the shaft 3. Arm 23 is the clutch arm 21 and spring receiver arm 2
2 is a clutch spring arranged on the spring support rod 24, with both ends received by the spring receiving plates 21a and 22a provided at 2; 25 is a short operating arm fixed to the lower end of the door shaft 5; 26 is the actuating arm; An operating pin 27 fixed to the end of the arm 25 and projected into the elongated hole 21b at the tip of the clutch arm 21 is pivotally supported by the spring receiving arm 22 at the end opposite to the spring receiving plate 22a. It is a roller that slides into contact with the The specific structure of the illustrated binding clutch 20 will be discussed later, but in any case, the binding clutch 20
0 is connected to the bundling passage 2 by the police car 7 as usual.
When the grain culms are pushed inward and a certain amount of grain culms are gathered in the bundling passage 2, the door 10 is moved against the force of the clutch spring 23 due to the pressing force of the packer 7 acting on the door 10 through the bundled grain culms. The door shaft 5 is rotated by a slight amount, and as a result, the clutch arm 21 is rotated by a slight amount in the direction shown by the imaginary line in FIG. When the clutch cam 19, which had been prevented from rotating until then, is ready to rotate, the clutch cam 19 is connected to the clutch gear 18, and the clutch cam 19 and the clutch shaft 4 are moved in the direction of arrow A in FIG. It is configured to rotate once. and clutch shaft 4
As the rotation progresses and the cam groove 19a formed in the clutch cam 19 reaches the roller 27 position, and the roller 27 falls into the cam groove 19a, the spring receiving arm 22 is moved by the force of the clutch spring 23 as shown in FIG. The door 10 is rotated as shown in the phantom line in FIG. 3, and the force of the clutch spring 23 is thereby extremely reduced, so that the door 10 can be freely rotated to open while the clutch arm 21 is rotated as shown in the phantom line in FIG. I'm getting used to it. The door 10 and the clutch arm 21 are returned to their original positions by the force of the clutch spring 23 as the roller 27 pulls out the cam groove 19a and the spring receiving arm 22 is returned to its original position at the end of one rotation of the clutch shaft 4.

The arm portion 13 of the needle 13 is
Curved interlocking arm 29 connected to pin 28 at one end to a
By connecting the other end with a pin 31 to a needle drive crank 30 fixed to the upper end of the clutch shaft 4, when the clutch shaft 4 is rotated once by the operation of the binding clutch 20, the tip trajectory shown in FIG. Along C ₂ , from the starting position C _2s to Building 1
Dead center position past the 2 and holder 11 positions
After being rotated to C _2d , return to the starting position C _2s
The release arm 14 provided on the opposite side of the knot is driven by the clutch shaft 4 in the following manner.

That is, in the illustrated case, the drive of the discharge arm 14 is obtained from the pin 31, which constitutes a crank pin for driving the needle, whose position is changed by the clutch shaft 4 to rotationally drive the needle 13, as described above. For this purpose, a curved interlocking arm 32 and a discharge drive arm 3, whose shapes are shown in FIG.
3 is provided. The curved interlocking arm 32 has bosses 32a and 32b at both ends, and the discharge drive arm 33 has a pin 33a attached to one end and a boss 33b at the other end. Further, a boss 14a is provided at the lower end of the inner surface of the discharge arm 14.
A plate piece 14b fixed to the boss 14a and a reinforcing plate 14c fixed at both ends to the lower end of the distal end of the main body of the ejection arm 14 are provided, and pins are inserted through the plate piece 14b and the reinforcing plate 14c, which are aligned vertically. hole 1
4d and 14e are drilled. As shown in FIGS. 1 and 2, the boss 32 at one end of the curved interlocking arm 32
a is the plate piece 14b of the ejection arm 14 and the reinforcing plate 14c.
Insert the pin 34 between the pin insertion holes 14d, 1
4e and the boss 32a to connect the curved interlocking arm 32 to the middle of the ejection arm 14,
The boss 33b of the discharge drive arm 33 is connected to the pin 31.
The pin 33a at the end of the ejection drive arm 33 is inserted into the boss 32b of the curved interlocking arm 32, thereby connecting the curved interlocking arm 32 and the ejection drive arm 33.

As described above, when the clutch shaft 4 makes one rotation, the ejection arm 14 is rotated around the door shaft 5 by the clutch shaft 4 through the link mechanism consisting of the needle drive crank 30, the ejection drive arm 33, and the curved interlocking arm 32. The link ratio of the link mechanism is set as follows. In other words, _the discharge arm 14 is rotatably driven along _the tip trajectory _C3 shown in FIG. _3d and the other dead center C _3d ′ located near the end of the binding passage 2.
There are C _3d and C _3d ′. The movement of the needle 13 and the ejection arm 14 is illustrated in FIGS. 5a to 5f and explained in detail. When the clutch shaft 4 is rotated once in the direction of arrow A, the needle drive crank 30 is rotated in the same direction. In contrast, the displacement of the pin 31 due to this causes the pin 3 to be moved through the ejection drive arm 33.
3a, the curved interlocking arm 32 and the ejection arm 14
The direction in which the ejection drive arm 33 extends from the pin 31 is set so that the ejection drive arm 33 is moved away from the binding path 2. Therefore, the tip of the discharge arm 14 is on the trajectory _C3 ,
After reaching the starting position C _3s to the first dead center position C _3d ,
It is rotated so as to pass from the first dead center position C _3d to the starting position C _3s and protrude into the binding passage 2,
When the needle 13 passes from the starting position C _2s shown in FIG. 5a through the position shown in FIG. 5b and reaches the dead center position C _2d shown in FIG. After reaching the first dead center position _C3d as shown in Fig. 5b, it is rotated slightly in the opposite direction toward the starting position _C3s as shown in Fig. 5c. . As shown in FIG. 5d, the discharge arm 14 has the needle 13 at the dead center position.
It is designed so that it can be rotated into the binding passage 2 after the return rotation starts from C _2d , and in the state shown in FIG. Completed and also the third
The clutch shaft 4 and the clutch cam 19 are rotated to the position where the roller 27 shown in the figure falls into the cam groove 19a of the clutch cam 19, so that the door 10 can be freely rotated to open as described above.
It is planned. The discharge arm 14 is then rapidly rotated to the dead center position _C3d ' as shown in FIG. 1 of the clutch shaft 4 is rotated in the opposite direction as shown in FIG.
When the rotation is complete, it returns to the starting position C _3s .

That is, when the clutch shaft 4 makes one rotation, the release arm 14 is once rotated in the opposite direction to the binding passage 2 from its standby position on one side of the binding passage 2 and substantially along the passage 2, and then Binding passage 2 again
When the binding of the grain culms is completed and the door 10 is in a state where it can freely rotate open, the door 10 is rotated into the binding passage 2.
reaches the other dead center position C _3d ' near the end of the binding passage 2 while being able to rotate open, and then is rotated back to the standby position.

The police car 7 can be rotationally driven along the tip trajectory _C1 shown in FIG. has been done. Further, the knot drive shaft 6 is driven by the clutch shaft 4 via a chain 41 wound between sprocket wheels 39 and 40 fitted to the respective lower ends of the clutch shaft 4 and the knot drive shaft 6. . At the upper end of this nodal drive shaft 6, there is a building 12 as usual.
and a partial bevel gear 4 for driving the holder 11
2 is fitted.

In the case shown in the figure, the binding clutch 20 engages with a rotation regulating surface formed at the lower end of the spring receiving plate portion 21a of the clutch arm 21, thereby locking the clutch cam 1.
9 and a clutch pawl 43 that prevents rotation of the clutch shaft 4 are supported by the clutch cam 19 so as to be rotatable around a vertical pin 44, and a spring 4 is stretched between the clutch pawl 43 and the clutch cam 19.
5, the rotational force is biased in the direction of engagement with the rotation regulating surface. As described above, when the clutch arm 21 is rotated a little in the direction shown by the imaginary line in FIG. 3 due to the pressing force against the door 10, and the clutch pawl 43 is disengaged from the clutch arm 21, as shown in FIG. As shown in the imaginary diagram, the clutch pawl 43 is rotated slightly by the force of the spring 45, and then the relative position with respect to the clutch cam 19 is fixed. A drive pin 46 that engages with the drive cam portion 43a from the direction of arrow A is implanted in the clutch gear 18. In the illustrated binding clutch 20, the drive pin 46 pushes the drive cam portion 43a of the clutch pawl 43 to obtain one rotation of the clutch cam 19 and the clutch shaft 4. Note that any binding clutch of known structure may be used without any problem in carrying out the present invention.

The illustrated binding machine is configured for use with binders, and a transmission shaft 48 for transmitting power to the grain culm lateral transport belt of the binder is supported along the vertical direction on the knot side of the binding case 1. This transmission shaft 48
The sprocket wheel 1 is fixed to the boss portion of the clutch gear 18 and the transmission shaft 48, respectively.
9 and 50, and a sprocket wheel 52 is fitted to the transmission shaft 48 for outputting the grain in the direction of the grain culm lateral conveyance belt outside the bundling case 1. It has been done.

Since the illustrated agricultural binding machine is constructed as described above, the required binding is performed in the following manner. That is, when the grain culms are repeatedly pushed by the packer 7 and a set amount of grain culms are bundled in the binding passage 2, the binding clutch 20 is engaged as described above, and the clutch shaft 4 is rotated once. As a result, the needle 13 is reciprocated along the tip trajectory _C2 to wrap the string around the grain culm and supply the end of the string to the building 12 and the holder 11, as well as the building 12 as required. The holder 11 then cuts the required string and holds the new end of the string.

Then, the discharge arm 14 starts to be driven simultaneously with the needle 13, but as described in detail above, the discharge arm 14 is once rotated from the standby position in the direction opposite to the binding path 2, and returns to the first dead center position C _3d. After reaching the , it is rotated in two directions of the binding path,
When the grain culm binding by the knot is completed, the roller 27 moves to the clutch cam 19 in the binding clutch 20.
After falling into the cam groove 19a of the door 10 and being able to freely rotate open, it is rotated into the bundling passage 2, and while the door 10 can freely rotate open, it reaches the dead center position _C3d '. Then, while pushing and opening the door 10 through the bundled grain bundles, the grain bundles are released as required. As described above, when the release arm 14 completes one revolution of the clutch shaft 4, the other intermittently driven members are similarly returned to the original standby position.

In the above embodiment, the door shaft 5 is replaced by the release arm 1.
Although such a fulcrum shaft can be provided in the vicinity of the binding passage 2 separately from the door shaft 5, in the embodiment, the ejection arm 14 is driven by the clutch shaft 4. Although the structure is such that this is done via the needle drive crank 30,
It is also possible to have the clutch shaft 4 drive the discharge arm 14 through a link mechanism that is completely separate from the drive system for the needle 13.

As is clear from the above description, in the agricultural binding machine of the present invention, the discharge arm 14 is placed on the side opposite to the knot part across the binding passage 2, and is supported by the binding case 1 near the binding passage 2. Vertical fulcrum shaft 5 provided
The discharging arm 14 is supported rotatably around the vertical fulcrum shaft 5, and the discharging arm 14 is attached to the clutch shaft 4 once from the standby position to the binding passage 2 during one rotation of the clutch shaft 4. The link mechanisms 30, 3 are rotated in the opposite direction, then rotated into the binding passage 2 to near the end of the binding passage 2, and then rotated again to the standby position.
It is characterized by being interlocked and connected by 3 and 32, and has the following advantages.

That is, the agricultural binding machine of the present invention is provided with a discharge arm 14 for pushing and releasing the bundled grain culm bundle, which is placed on the opposite side of the knot with the binding passage 2 and supported rotatably near the binding passage 2. It is sufficient that such a discharging arm 14 has a short length so as to be able to rotate from the upstream side to the downstream side within the bundling passage 2 and discharge the desired grain culm bundle. The ejection arm 14 can be made small and lightweight, thereby reducing the power consumption for driving the ejection arm 14 and, therefore, the horsepower of the engine mounted on the binder or the like. do.

However, the agricultural binding machine of the present invention does not give half a rotation only at the end of one rotation of the clutch shaft, unlike the conventional type in which the release arm is also used as a door, but the link mechanism 30, 3
3 and 32, the ejection arm 14 is constantly driven during one rotation of the clutch shaft 4, and such constant driving of the ejection arm 14 is designed so that the required grain culm bundling by the cooperation of the needle and the knot is not hindered. In addition, the rotation locus of the ejection arm 14 by the link mechanisms 30, 33, and 32 is set, and an expensive and complicatedly shaped partial gear for half-rotation drive is not used as in the conventional system described above. Therefore, production costs can be kept low.

[Brief explanation of drawings]

Fig. 1 is a plan view of an embodiment of the present invention, Fig. 2 is a developed longitudinal section of the embodiment, Fig. 3 is a cross-sectional plan view of a part of the embodiment, and Fig. 4 is a summary of the embodiment. The exploded perspective views of FIGS. 5a, b, c, d, e, and f are plan views showing only the main parts of the same embodiment in different states. 1... Binding case, 2... Binding passage, 4... Clutch shaft, 5... Door shaft, 7... Packer, 10... Door, 1
1...Holder, 12...Bill, 13...Needle, 1
4... Discharge arm, 14a... Boss, 20... Binding clutch, 29... Curved interlocking arm, 30... Needle drive crank, 31... Pin, 32... Curved interlocking arm, 33... Discharge drive arm, 33a... Pin, 34
…pin, 35…key, C ₃ …tip trajectory, C _3d …first dead center position, C _3d ′…other dead center position.

Claims (1)

[Claims] 1. The discharge arm is rotatably supported around the vertical fulcrum axis, which is supported by the tying case near the tying passage, on the side opposite to the knot part across the tying passage. When the clutch shaft rotates once, the release arm is rotated once from the standby position in the opposite direction to the binding passage, and then moved into the binding passage to near the end of the binding passage. An agricultural binding machine characterized by being interlocked and connected by a link mechanism so that it can be rotated and then rotated again to a standby position.