JPH0436593Y2 - - Google Patents

Description

[Detailed description of the invention] "Field of industrial application" The present invention relates to a straw tying machine that is installed at the rear of a combine harvester and binds threshed waste straw. The present invention relates to an automatic clutch device that vertically operates a binding input clutch of a binding machine based on an output signal from a sensor.

"Prior Art" Normally, in this type of structure, the grain culm sensor is provided in the reaping conveyance path during which the reaped grain culm is sent to the threshing section, and the output signal of the sensor is Based on this, handling depth adjustment and longitudinal operation of the binding input clutch are performed.

"Problems to be Solved by the Invention" In the above-mentioned conventional technology, when the binding input clutch is turned on and off by a motor, it is necessary to provide a special motor for the clutch on and off, which reduces costs and improves handling and operability. There were problems such as not being able to make improvements easily.

``Means for Solving the Problems'' However, the present invention is equipped with a binding position adjustment motor that moves the binding machine left and right and turns on and off the binding input clutch that drives and controls the binding machine. This is a characteristic feature.

"Function" Therefore, since the motor that operates and moves the tying machine is also used to turn on and off the tying input clutch, there is no need to provide a dedicated motor for turning on and off the clutch, and the tying position can be adjusted frequently. Therefore, the motor, which operates infrequently, can be used effectively, and the cost can be reduced by using the motor in combination, and handling operability can be easily improved by remote control or automatic control.

"Embodiment" An embodiment of the present invention will be described below in detail based on the drawings.

Fig. 1 is an electrical circuit diagram of the binding section, Fig. 2 is an overall side view of the combine harvester, and Fig. 3 is a plan view of the same. The machine base is supported by the truck frame 1 via a rotating fulcrum shaft 4 and a lifting cylinder 5, 6 is a threshing section that incorporates a handling cylinder 8 on which a feed chain 7 is suspended on the left side, and 9 is a cutting blade 10 and a grain culm. 12 is a straw cutting section provided behind the threshing section 6, and 13 is a grain lifting cylinder 14.
15 is an engine that drives each part of the combine harvester; 16 is a cab equipped with a driver's seat 17 and a driving operation section 18; It is configured to reap and thresh.

As shown in FIGS. 4 and 5, a straw binding part 19 is installed on the rear side of the straw cutting part 12, and the straw binding part 1
9 is equipped with a straw tying machine 20, and also includes a straw removal chain 21 that selectively feeds waste straw to the bundling section 19 or the straw cutting section 12, and the straw removal chain 21 is connected from the feed chain 7 to the straw removal chain 21. The structure is such that the waste straw transferred to the waste straw is sent to the waste straw cutting part 12 or the waste straw binding part 19.

The binding machine 20 includes a clutch door 22 that stops the movement of waste straw at a binding position, a packer 23 that collects and compresses the waste straw, and a needle 24 that wraps a string around the waste straw bundle.
5, a knotting device 28 having a discharge arm 27 is supported above the transmission case 25 via transmission cases 26a and 26b, and after the binding is completed, the bound bundle is discharged outside the machine by the discharge arm 27. It is configured to allow

As shown in FIGS. 6 and 7, the binding machine 20 has a rear portion supported by a binding main body frame 29 and a front portion supported by a guide frame 30 fixed to the binding main body frame 29 so as to be slidable left and right. The binding machine 20 is connected via a coupling member 35 and a bracket 36 to a rotating screw shaft 34 which is interlocked and connected to a binding position adjustment motor 31 via reduction gears 32 and 33 which are gear transmission mechanisms,
By moving the bundle binding machine 20 left and right by forward and reverse driving, the binding position of the binding machine 20 can be adjusted from side to side.

On the other hand, the binding machine 20 is sandwiched in the center, and an ear guide plate 37 is integrally provided on the right side, and a main deck 38 for guiding the culm center is integrally provided on the left side.
The main deck 38 is integrally equipped with an auxiliary stock guide deck 39 and a stock stock aligning plate 40 on the left side thereof.
2 facing the upper surface, and is provided so that when the rotary roll 42 is driven by a motor 43, the waste straw that contacts the upper surface of the roll 42 is moved in the direction of the alignment plate 40, and the base of the straw is brought into contact with the alignment plate 40. ing.

Further, the auxiliary deck 39 and the stock alignment plate 40 are supported by a cross-feeding case 44, and the case 4
4 is connected to an alignment plate position adjustment motor 46 via a rotary screw shaft 45, and the auxiliary deck 39 and the stock alignment plate 40 are connected to the alignment plate position adjustment motor 46 through the rotation screw shaft 45.
It is configured to be able to move and adjust the and left and right sides together.

Further, the alignment plate 40 is
4 through a rotation fulcrum shaft 47, and is connected to the cutter shaft 48a of the high-speed cutter 48, which is the input shaft of the straw removal cutting section 12, via a pair of reduction gears 49, 50. The fulcrum shaft 47 is connected to the gear 50 of the cutter shaft 51a of the cutter 51 via an eccentric shaft 52 and a swing link mechanism 53, so that when the gear 50 rotates, the alignment plate 40 reciprocates around the fulcrum shaft 47. The arrangement is such that moving the stocks facilitates the alignment of the stocks.

By the way, the bundling input shaft 54 that inputs driving force to the bundling machine 20 is operatively connected to the high-speed cutter shaft 48a through V pulleys 55, 56, a V belt 57, and a tension pulley 58 that constitutes a bundling input clutch 58a. ing. The middle of the tension arm 60 of the tension pulley 58 is swingably supported via a fulcrum shaft 61 on a shaft bracket 59 that supports the right end side of the input shaft 54 on the main body frame 29, and the rotary screw shaft 34, the eccentric shaft 62 of the large-diameter reduction gear 33 fixed to the right end of the tension arm 60, and the other end side 60a of the tension arm 60 are fitted into the connecting rod 63 and the eccentric shaft 62 so as to be freely rotatable. They are provided so as to be connected to each other via. A tension arm spring 65 that presses the tension pulley 58 against the belt 57 with return spring force is wound around the fulcrum shaft 61, and when the eccentric shaft 62 is in the retracted position due to the rotation of the gear 33, the rod 63 and engaging metal fitting 6
4 and release the spring 6 into a free state.
The tension pulley 58 is brought into pressure contact with the belt 57 by force, and the clutch 58a is brought into the engaged state, while the rotation of the gear 33 moves the eccentric shaft 62 to the forward position, and the engagement fitting 64 engages the fixed locking plate of the rod 63. 6
6 and pushes up the other end of the tension arm 60 against the force of the spring 65, the tension pulley 58 is separated from the belt 57 and the clutch 58a is disengaged.

Note that 67 is a motor bracket for attaching the motor 31 to the bundling body frame 29, and 68 is a bundling roll provided at the rear of the straw removal chain 21.

As shown in FIG.
A waste straw sensor 69 is provided which is a grain culm sensor that detects waste straw transferred at 1, and the sensor 69
A clutch limit switch 70 that operates in the forward direction when the sensor 69 detects waste straw and engages the clutch 58a to stop the driving of the motor 31; and a clutch limit switch 70 that causes the clutch 58a to be driven in the reverse direction when the sensor 69 no longer detects waste straw. The binding section 19 is provided with a clutch disconnecting limit switch 71 for disengaging the clutch 58a and stopping the driving of the motor 31, and left-right position limit switches 72 and 73 for detecting the end of left-right movement when adjusting the left-right position of the binding machine 20. . In addition,
The on/off limit switches 70, 71 are turned on and off by a switch operation cam 86 which is integrally fixed to the screw shaft 34.

FIG. 1 shows the control circuit of the motor 31, which is operated by a clutch switch which is switched when cutting or tying the waste straw transferred by the straw removal chain 21 to the removal straw cutting section 12 or the removal straw binding section 19. A selection switch 74, which is an operating means, is connected to a power source 76 via a key switch 75, and a relay switch 7 drives the motor 31 in normal rotation.
A closing contact 78a of a forward rotation manual operation switch 78 for position adjustment, a closing contact 79a of a reverse rotation manual operation switch 79 for position adjustment, an opening switch 69a of the straw discharging sensor 69, and a limit switch for engaging the clutch are connected to the operation relay 77 of 7a. The binding side switching terminal 74a of the selection switch 74 is connected via the closing contact 70a of the selection switch 70.
is connected, and when the straw removal sensor 69 detects straw removal, that is, when the open switch 69a is on,
The motor 31 rotates the screw shaft 34 approximately half a turn in the positive direction from the position where the cam 86 operates the cut limit switch 71 to the position where the cut limit switch 70 is operated and the closing contact 70a is turned off.
It is designed to drive in forward rotation. When the motor 31 rotates in the normal direction, the binding device 20 is moved toward the stock end in the direction of the arrow a in FIG. It is.

In addition, the operating relay 80 of the relay switch 80a that drives the motor 31 in reverse is connected to the closing contacts 78a, 79a, the closing switch 69b of the straw discharging sensor 69, and the clutch activation limit switch 70.
Opening contact 70b. Self-holding relay 81. of the contact 70b. The bundling side switching terminal 7 of the selection switch 74 is connected via the delay timer switch 82 and the closing contact 71a of the clutch disconnection limit switch 71.
4a is connected, and the open relay switch 81a of the relay 81 is connected to the open contact 70b in a parallel circuit, and the switch 69a is switched from on to off when the straw removal sensor 69 no longer detects the grain culm, and the switch 69b The sensor 6 turns on from off to on.
9, when the switch 69b is turned on, after a certain period of time (approximately 1 second) determined by the timer switch 82, the cam 86 operates the cut-off limit switch 71 from the position where the cut-off limit switch 70 is operated. The motor 31 is provided to be driven in the reverse direction to rotate the screw shaft 34 approximately half a turn in the opposite direction to a position where the closing contact 71a is turned off.

Furthermore, the operation switch 78 is used to manually adjust the position of the binding machine 20 to the left (toward the stock side).
The relay 77 is connected to the switching terminal 7 through the open contact 78b of the contact 78b, the self-holding relay 83 of the contact 78b, and the close contact 72a of the left position limit switch 72.
4a, and connect the relay switch 83a of the relay 83, the closing contact 71b of the cutting limit switch 71, and the closing switch 69c of the straw removal sensor 69 to the opening contact 78b in a parallel circuit,
When the straw removal sensor 69 is in the OFF state (the close switch 69c is ON), the motor 31 is activated by the operation switch 78.
When stopping the normal rotation of the motor 31, even after the open contact 78b of the switch 78 is turned off, the motor 31 is driven in the normal rotation until the cam 86 operates the cutting limit switch 71 and turns off the closing contact 71b.

Furthermore, the left position limit switch 72
The open contact 72b and the self-holding relay 84 of the contact 72b are connected to the open switch 69a and the switching terminal 74.
The relay switch 8 of the relay 84 is connected to the closing contacts 78a, 79a and the parallel circuit between
4a is connected to the parallel circuit to the open contact point 72b, and the straw removal sensor 69 is in the on state (the open switch 69a is on).
Then, the left position limit switch 72 is operated by the operation switch 78 of the motor 31 for normal rotation, and the closing contact 72a is turned off. After the opening contact 72b is turned on, the motor 31 is turned on until the cam 86 operates the duty limit switch 70 and turns off the closing contact 70a.
It is designed to drive in forward rotation.

On the other hand, the operation switch 79 is used to manually adjust the position of the binding machine 20 in the right direction (toward the tip side).
The operation relay 80 is connected to the bundling side switching terminal 74 via the open contact 79b of the contact 79b, the self-holding relay 85 of the contact 79b, and the right position limit switch 73.
In addition, the relay switch 85a of the relay 85, the closing contact 71c of the clutch cut-off limit switch 71, and the normally closed contact 69d of the straw removal sensor 69 are connected to the contact 79b in parallel circuit, and the straw removal sensor 69 is turned off. Status (close switch 69
d) to stop the reverse rotation of the motor 31 by the operation switch 79, the switch 79
Even after the opening contact 79b is turned off, the cam 86 operates the cut-off limit switch 71, and the closing contact 71c is turned off.
The motor 31 is provided to be driven in reverse until it is turned off.

Further, the cutter side switching terminal 74b of the selection switch 74 is directly connected to the cutting limit switch 71, and when the switch 74 is switched to the cutter side during binding operation, the motor 31 is reversely driven to switch the clutch 58a. When the closing contact 71a of the clutch disconnecting limit switch 71 is turned off, the driving of the motor 31 is stopped.

Note that the relay 8 is connected between the closing switch 69b and the closing contact 71a of the cut-off limit switch 71.
During the bundling operation, the straw evacuation sensor 69 detects the grain culm, the motor 31 is driven in the forward direction, and the cam 86 operates the duty limit switch 70 to close the contact 70a. When the sensor 69 no longer detects grain culms and the close switch 69b is turned on, the motor 31 is immediately driven in reverse, and the cam 86 operates the cut limit switch 71 to turn off the close contact 71a. It is designed to be restored to its original state. As is clear from the above, the bundling position adjustment motor 31 performs bundling position adjustment to move the bundling machine 20 left and right and turns on and off the bundling input clutch 58a that drives and controls the bundling machine 20.
is provided, and the motor 31 is used for different purposes to perform the bundling position adjustment operation and the bundling drive stop operation.

The present embodiment is configured as described above, and its operation will be explained below.

The binding operation is started by switching the selection switch 74 to the binding side, and the binding machine 20 is started by driving the motor 31 in the forward and reverse directions using the manual operation switches 78 and 79.
The left and right position is adjusted. As shown in FIG. 9, when the straw removal sensor 69 detects that the straw removal chain 21 has received the waste straw from the feed chain 7 and the waste straw has moved to the waste straw conveyance path 21a. That is, when the sensor 69 is in the on state (the open switch 69a is on), the motor 31 is driven to rotate in the normal direction and rotates the large diameter reduction gear 33 connected to the tension pulley 58, as shown in the virtual line state in FIG. From the state in which the cut-off limit switch 71 is turned off by the cam 86 (the contact 71a is turned off), the use limit switch 70 is turned off by the cam 86 (the contact 71a is turned off) as shown by the solid line in the figure.
When the motor 31 is driven to rotate in the normal direction, the drive of the motor 31 is stopped. During the rotation of the gear 33, the eccentric shaft 62 moves to the retracted position, and the engagement between the rod 63 and the engagement fitting 64 is released, and the tension pulley 58 is moved to the belt by the return spring force of the tension arm spring 65. 57
The binding clutch 58a is brought into contact with the binding clutch 58a, and the driving force from the cutter shaft 48a is transmitted to the binding machine 20.

During such bundling work, when the straw removal sensor 69 no longer detects the transfer of waste straw, that is, the sensor 69 is in the off state (switch 69a off, switch 69b on), the timer switch 82 is activated.
The motor 31 is driven in reverse after a fixed time T (approximately 1 second) set by a timer, and when the cam 86 turns off the cut-off limit switch 71 (turns off the contact 71a), the drive of the motor 31 is stopped. During this drive, the gear 33 rotates in the opposite direction, so that the binding clutch 58a is forcibly disengaged as shown by the imaginary line in FIG.

FIG. 10 shows an example of a configuration in which the aforementioned embodiment is implemented using a control circuit 87 consisting of a small computer, in which manual operation switches 78 and 79 for adjusting the left and right positions of the binding machine 20 are replaced by a forward/reverse changeover switch 8.
8, except that the switch configuration is the same as that described above, except that the left and right position adjustment is performed by a single switch 88, and the switch 88 has substantially the same function and effect as the previous embodiment. Components are given the same numbers and detailed explanation thereof will be omitted.

"Effects of the Invention" As is clear from the above embodiments, the present invention includes a bundling position adjustment motor 31 that adjusts the bundling position to move the bundling machine 20 left and right and turns on and off the bundling input clutch 58a that drives and controls the bundling machine 20. It was set up,
Since the motor 31 for moving the binding machine 20 left and right is also used to turn on and off the binding input clutch 58a, there is no need to provide a dedicated motor for turning on and off the clutch 58d, and the binding position is not adjusted frequently. , the motor 31 that operates less frequently
It is possible to effectively utilize the motor 31, thereby reducing costs and improving handling operability through remote control or automatic control.

[Brief explanation of the drawing]

Fig. 1 is an electrical circuit diagram of the binding section, Fig. 2 is an overall side view of the combine, Fig. 3 is a plan view of the combine, Fig. 4 is a rear view of the binding section, Fig. 5 is a plan view of the combine, and Fig. 6 Figure 7 is a side view of the binding input clutch, and Figure 7 is a plan view of the same.
FIG. 8 is an explanatory diagram of the operation of the binding section, FIG. 9 is a timing chart, and FIG. 10 is an explanatory diagram showing another modification. 6... Threshing section, 19... Binding section, 20... Binding machine, 21a... Straw removal conveyance path, 58a... Binding input clutch, 69... Grain culm sensor.

Claims (1)

[Scope of utility model registration request] Binding position adjustment by moving the binding machine 20 left and right;
Binding input clutch 58 that drives and controls the binding machine 20
A straw tying machine characterized by being provided with a tying position adjustment motor 31 for turning on and off.