JPH022196Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a harvesting machine equipped with an automatic handling depth adjustment device, and more specifically, the invention relates to a harvesting machine equipped with an automatic handling depth adjustment device. A harvester is provided which is equipped with an adjustment device.

Harvesting machines are equipped with an automatic handling depth adjustment device that adjusts the relative position of the grain culm supplied to the threshing section and the handling barrel to obtain an appropriate handling depth. Before starting the grain culm, the handling depth is completely unrelated to the length of the grain culm to be harvested. Immediately after starting, extremely deep or shallow handling may occur, resulting in poor sorting and handling. There was a tendency to leave something behind.

The present invention has been developed to eliminate such inconveniences, and at the start of automatic handling depth adjustment, the movable member for adjusting the handling depth, such as a vertical conveyance chain, is forced to a preset position. Move it to
A harvesting machine capable of detecting the length of a grain culm and adjusting the handling depth based on the detection result, quickly realizing a handling depth that matches the length of the grain culm. The purpose is to provide

The present invention will be described in detail below with reference to drawings showing embodiments thereof. FIG. 1 is an external view of the harvesting machine according to the present invention (hereinafter referred to as the present machine), in which the grain culm cut by the reaping section K is threshed from the vertical conveyance chain 1 via upper and lower conveyance devices (not shown). Transferred to Department D. Near the entrance of the threshing section D, detection switches M and H that open and close by detecting the long and short dimensions of the grain culm are arranged in the order of M and H from the vertical conveyance chain 1. If the grain culm is long enough to reach the detection switch H located far from the vertical conveyance chain 1 or feed chain 2 (on the right side of the machine), move the vertical conveyance chain 1 toward the outside of the machine. (Left side)
Conversely, if the grain culm is so short that the tip of the grain does not reach the detection switch M, the vertical conveyance chain 1 is raised toward the inside of the machine body. The posture of feed chain 1 is rotated and adjusted, and the feed chain 2 takes over this state. Furthermore, a detection switch L such as a limit switch is provided at a position a suitable distance away from the detection switch M toward the vertical conveyance chain 1, and the grain stalks are pinched in the vertical conveyance chain 1 and conveyed toward the feed chain 2. It has become possible to detect when it is being used.

FIG. 2 is a schematic diagram showing the hydraulic circuit of the proposed machine and the vertical conveyance chain 1 whose attitude (inclination angle) is controlled thereby. The vertical conveyance chain 1 is connected to a rod 4a of a hydraulic cylinder 4 as a driving means for adjusting the handling depth by tilting and raising the chain. Reference numeral 5 denotes a 4-port, 3-position switching type electromagnetic directional control valve, which changes to the switching position by energizing the solenoid 5r, and the rod 4a moves back as shown by the arrow to raise the vertical conveyance chain 1, i.e. It is adjusted to the deep handling side, and conversely, when the solenoid 5l is energized, it becomes the switching position and the rod 4a advances to tilt the vertical conveyance chain 1, that is, adjust it to the shallow handling side.

A variable resistor 61 is attached to a suitable position on the support rod of the vertical conveyance chain 1, and when the vertical conveyance chain 1 is tilted or raised, it exhibits an electrical resistance value corresponding to the inclination angle.

FIG. 3 shows a circuit for exciting the solenoids 5l and 5r, in other words, an electric circuit of the handling depth adjusting device. 80 is a battery, and the negative electrode side is grounded to the body. Further, one end of a key switch 81 is connected to the positive terminal of the battery 80, and the other end of the key switch 81 is connected to an automatic selection switch 82 that commands selection of automatic handling depth adjustment, and a manual switch for commanding shallow handling. 83 and one end of a manual switch 84 for deep handling command, respectively. The other end of the automatic selection switch 82 is connected to one end of the normally open contact La of the grain culm detection switch L, and also includes an automatic lamp 3 and a variable resistor 61 for notifying that automatic adjustment of the handling depth has been selected.
one end of each resistor 62, a switch transistor 87,
88 collectors.

The other end of the normally open contact La of the detection switch L is connected to one end of the normally open contact 91a of the electromagnetic relay 9 via the normally open contact Ma of the detection switch M, the normally open contact Ha of the detection switch H, and the limit switch 85. Through the normally closed contact Mb of the detection switch M and the limit switch 86, the other normally open contact 9 of the electromagnetic relay 9
It is connected to one end of 2a. Furthermore, the normally open contact La
The other end is also connected to the excitation coil 9c of the electromagnetic relay 9. The limit switches 85 and 86 are provided at positions where they open when the vertical conveyance chain 1 reaches the tilting limit and the rising limit, respectively. When the tilting limit, that is, the shallow handling side limit is reached, the limit switch 85 is activated. When the limit switch 86 reaches the rising limit, that is, the limit on the deep handling side, the limit switch 86 opens the circuit.

As described above, the variable resistor 61 is designed to exhibit a resistance value depending on the inclination angle of the vertical conveyance chain 1. Here, the resistance value is minimum when the vertical conveyance chain 1 is in the most upright position, and the resistance value is the lowest when the vertical conveyance chain 1 is in the upright position. The resistance value is the highest when it is most inclined. The other end of the variable resistor 61 is a comparator 71
It is connected to the + input terminal of the comparator 72 as well as to the - input terminal of the comparator 72, and is also connected to the body ground via a resistor 65. Resistor 62 is resistance 6
3, variable resistor 64, and automatic selection switch 8
2. It is connected in series between the body ground and the connection point between resistor 62 and resistor 63 is connected to - of comparator 71.
A connection point between the resistor 63 and the variable resistor 64 is connected to the + input terminal of the comparator 72 as an input terminal.

The output terminals of comparators 71 and 72 are connected to the bases of switch transistors 87 and 88, respectively. Further, the emitters of the switch transistors 87 and 88 are connected to one end of the normally closed contacts 91b and 92b of the electromagnetic relay 9, respectively. The other ends of the normally open contact 91a and the normally closed contact 92b of the electromagnetic relay 9 are connected to the solenoid 5 that should be energized when adjusting to shallow handling.
1, and the other ends of another normally open contact 92a and normally closed contact 92b of the electromagnetic relay 9 are connected together to a solenoid 5r to be energized during adjustment to deep handling. Also, manual switch 8 for shallow handling command.
3 and the other ends of the deep handling command manual switch 84 are also connected to the solenoids 5l and 5r, respectively. The other ends of these solenoids 5l and 5r are grounded to the body.

Potentials V ₂ and V ₃ determined by the resistance values of the resistors 62 and 63 and the variable resistor 64 are applied to the − input terminal of the comparator 71 and the + input terminal of the comparator 72, respectively.
A potential V ₁ determined by the resistance values of the variable resistor 61 and the resistor 65 is applied to the + input terminal of the comparator 72 and the - input terminal of the comparator 72 . Since the resistance value of the variable resistor 61 changes depending on the inclination angle of the vertical conveyance chain 1, the potential _V1 changes accordingly. Therefore, when the potential V ₁ is V ₁ >V ₂ , the output of the comparator 71 becomes high level, turning on the switch transistor 87 and exciting the solenoid 5l via the normally closed contact 91b. Further, when the potential is V ₃ >V ₁ , the output of the comparator 72 becomes high level, turning on the switch transistor 88 . and the potential is V ₂
>V ₁ >V ₃ , the outputs of comparators 71 and 72 both remain at low level, and switch transistors 87 and 88 are turned off. Variable resistors 61 and 64, resistors 62, 6
The resistance value of 3.65 is such that while the vertical conveyance chain 1 is in the range of a predetermined tilted position from the standing limit, the potential becomes V ₁ > V ₂ (as mentioned above, the vertical conveying chain is at the standing limit). When the variable resistance 61 is at its minimum,
The potential V ₁ is set to be the maximum), and V ₁ <V ₃ as long as the potential V 1 is within the range of a predetermined amount of standing up from the tilt limit. Note that the resistance value of the variable resistor 64 is changed as appropriate to finely adjust the potentials V ₂ and V ₃ depending on the region of use and the like.

The operation of the proposed machine constructed as described above is as follows. While the key switch 81 is currently turned on, the automatic selection switch 82 is turned on when starting collection.
When turned on, the automatic lamp 3 is turned on to notify that automatic adjustment has been selected. On the other hand, the position of the vertical conveyance chain 1 is detected by a variable resistor 61,
When the vertical conveyance chain 1 is at the most upright (or tilted) position or a place close to this, the potential V ₁ >
V ₂ (or V ₃ > V ₁ ), and the comparator 71
Since the output of (or 72) is at a high level, switch transistor 87 (or 88) is turned on. At this time, the grain culm has not yet reached the position of the detection switch L and the excitation coil 9c is not energized, so the solenoid 5l (or solenoid 5r) is energized via the normally closed contact 91b (or 99b).
As a result, the solenoid valve 5 selects the position (or) and tilts the vertical conveyance chain 1 toward the shallow handling side (or raises it toward the deep handling side). In this case, the inclination angle of the vertical conveyance chain 1 is detected by the variable resistor 61, and the potential _V1 gradually becomes lower (or higher) until the vertical conveyance chain 1 reaches a predetermined position.
V ₁ = V ₂ (or V ₃ = V ₁ ) and comparator 7
The output of solenoid 1 (or 72) becomes low level, and solenoid 5l (or 5r) is demagnetized. Further, when the automatic selection switch 82 is turned on and the vertical conveyance chain 1 is at a predetermined position, that is, when the potential is within the range corresponding to V ₂ > V ₁ > V ₃ , the comparator 71
and 72 are both at low level, and the vertical conveyance chain 1 maintains its position.

When the grain culm harvested by the reaping section K is transferred to the vertical conveyance chain 1 and reaches the vicinity of the entrance of the threshing section D, the normally open contact of the detection switch L that detects the conveyance of the grain culm is activated. When La is closed, the excitation coil 9c of the electromagnetic relay 9 is excited, the normally closed contacts 91b and 92b are opened, and the normally open contacts 91a and 92a are closed, allowing adjustment by the automatic handling depth adjustment device. That is,
The handling depth is automatically adjusted regardless of the length of the grain culm, and in the case of a short grain culm, the grain culm does not come into contact with the detection switch M, and the detection switch The open contact Ma remains open, the normally closed contact Mb remains closed, and the normally open contact 91 of the electromagnetic relay 9
Since the circuit b is also closed, the solenoid 5r is excited, and the vertical conveyance chain 1 is raised and moved to the deep handling side. The movement of the vertical conveyance chain 1 is continued until the grain culm comes into contact with the detection switch M and is activated. In this case, when the vertical conveyance chain 1 reaches the limit on the deep handling side, the limit switch 86 operates and opens, so the solenoid 5r is demagnetized, and the hydraulic cylinder 4 drives the vertical conveyance chain 1 toward the deep handling side. will be stopped. In addition, if the transported grain culm does not reach the detection switch H but has the appropriate length to reach the detection switch M, the normally open contact La of the detection switch L is closed, and the normally open contact Ma of the detection switch M is closed. is closed, the normally closed contact Mb is opened, and the normally open contact Ha of the detection switch H remains open. Therefore, assuming that the handling depth is appropriate, both solenoids 5l and 5r are not energized, and the vertical conveyance chain 1 holds its position. Furthermore, if the grain culm being conveyed is long enough to reach the detection switch H, the normally open contacts La, Ma and
Ha is closed, and the normally open contact 91a of the electromagnetic relay 9
is also closed and the solenoid 5l is energized to tilt the vertical conveyance chain 1 to the shallow handling side. This tilting continues until the normally open contact Ha of the detection switch H is closed. In this case, when the vertical conveyance chain 1 reaches the limit on the shallow handling side, the limit switch 85
operates to open the circuit, so the solenoid 5l is demagnetized and the driving of the vertical conveyance chain 1 to the shallow handling side by the hydraulic cylinder 4 is stopped.

Under such conditions, when the automatic selection switch 82 is opened or the shallow handling command manual switch 83 or the deep handling command manual switch 84 is pushed in, the solenoid 5l or 5r is energized. The vertical conveyance chain 1 can be tilted or erected, and the handling depth can also be adjusted manually.

In the above-described embodiment, the variable resistor 61 is provided on the support rod of the vertical conveyance chain 1 to detect the inclination angle. It may also be configured to detect the amount of advance and retraction of the piston rod of the hydraulic cylinder.

In addition, although the inclination angle of the vertical conveyance chain 1 was configured to be detected by a variable resistor, instead of this,
A configuration may also be adopted in which a micro switch or the like is provided that operates when the vertical conveyance chain 1 is within a predetermined range, and the solenoid is energized depending on whether the switch is on or off.

As described in detail above, the present invention is a harvester equipped with a device that detects the length of the harvested grain culm and adjusts the handling depth based on the detection result. and a means for moving a movable member for adjusting the handling depth to a predetermined position when the automatic handling depth adjustment is instructed, The means is configured to move the movable member only when the sensor detects the absence of grain culms, so that the vertical conveyance chain is in the most upright position or the most inclined position. In some cases, even if automatic handling depth adjustment is started, the proper handling depth is quickly achieved until the grain culm reaches the threshing section, and the handling barrel is overloaded due to deep handling and handling due to shallow handling. The present invention has excellent effects, such as not leaving any residue behind, and stable handling depth can be obtained thereafter.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention.
The figure is an external view of the proposed machine, FIG. 2 is a schematic diagram showing the hydraulic circuit, etc. of the proposed machine, and FIG. 3 is an electric circuit diagram of the proposed machine. 1... Vertical conveyance chain, 5... Solenoid valve, 5l, 5r
... Solenoid, 61... Variable resistor, 71, 72...
Comparator, L, M, H...detection switch.

Claims (1)

[Scope of utility model registration request] In a harvesting machine equipped with a device that detects the length of harvested grain culms and automatically adjusts the handling depth based on the detection results, a sensor that detects the presence or absence of grain culms supplied from the reaping section to the threshing section. and means for moving a movable member for adjusting the handling depth to a predetermined position when the automatic handling depth adjustment is instructed, and the means includes means for moving a movable member for adjusting the handling depth to a predetermined position when the sensor indicates the absence of grain culm. A harvester characterized in that the movable member is configured to move only when detection is being made.