KR0137521B1 - An elevator in mower - Google Patents

Abstract

In the lifting apparatus of the harvesting machine provided with a harvesting operation part 5, the lifting operation means 9 which raises and lowers it between a rising target position and a falling target position, and the control means 18 which controls the lifting operation means. The apparatus is characterized in that the mowing operation part 5 with respect to the control means 18 on the basis of mowing operation state detection means S0 for detecting whether the mowing operation part 5 is in a mowing operation state and an artificial operation. And an automatic elevating instruction means (SW) for giving an instruction for raising and lowering, and the control means (18) detects that the mowing operation detecting means (S0) has changed from the mowing operation state to the non-cutting operation state. It is characterized in that it is configured to operate the elevating operation means 9 in order to raise the harvesting operation unit 5 to the ascending target position by operating the automatic elevating instruction means SW within a set time.

Description

Lifting device for mowing machines

1 is a side view of the front of the combine

2 is a control block diagram

3 is a plan view showing the operation direction of the operation lever.

4 is a control flowchart of the first embodiment.

5 is a control timing chart of the first embodiment.

6 is a control flowchart of the second embodiment.

7 is a control timing chart of the second embodiment.

8 is a control flowchart of the third embodiment

9 is a control timing chart of the third embodiment.

10 is a control flowchart of the fourth embodiment.

10A shows the control flowchart of the fourth embodiment.

10B is a control flowchart of the fourth embodiment.

[Industrial use]

The present invention relates to a lifting device of a harvesting machine equipped with a lifting operation means for driving up and down the harvesting operation part, and a control means for controlling the lifting operation means.

[Prior art]

In the lifting device of the harvesting machine, conventionally, whenever a command of the lifting command means based on the artificial operation is given, the control means raises the harvesting work unit to the ascending target position and descends to the descending target position. The lifting and lowering operation means was configured to alternately appear in the state. In addition, this control was configured to be executed irrespective of the working conditions of the mowing machine.

The above-mentioned structure is capable of automatically elevating the harvesting work part to the target position by the instruction of the elevating instruction means, for example, compared to the structure of artificially varying the elevating position based on the operation of the manual elevating means. By eliminating the problem, the operation of lifting and lowering the mowing section is simply performed.

By the way, in the said conventional structure, even if the operator's body contacts and the lifting instruction | indication means is operated by mistake in the middle of a mowing operation, for example, a mowing operation part will raise to an ascending target position automatically, There was a possibility of damage to crops.

In addition, in the case of employing a configuration in which the elevating means and the manual elevating means for artificially adjusting the elevating position of the mowing operation unit are employed, for example, in the non-working state, the mowing operation is based on the operation of the elevating command means. After lowering the part to the target lowering position and then raising the cutting operation part to the desired position by manual lifting means, thereafter, even though the cutting operation part is to be lowered, the cutting operation part reaches the target rising position in spite of the operator's intention. It became unfavorable situation to rise and had room for improvement.

The present invention has been made in view of such a point, and its object is to provide the advantage of simplifying the lifting operation of the cutting work part, and it is not preferable that the cutting work part moves up and down against the operator's intention due to the operator's error of operation. It is an object of the present invention to provide a lifting device for a mowing machine that can prevent an unforeseen situation.

[Summary of invention]

(A) A feature configuration of the present invention is a lifting device of a harvesting machine having a mowing operation unit, a lifting operation means for lifting it up and down between a rising target position and a falling target position, and a control means for controlling the lifting operation means. And, the apparatus is an automatic elevating instruction for giving an instruction for raising and lowering of the mowing operation part to the control means based on the mowing operation state detecting means for detecting whether the mowing operation part is in the mowing operation state or the non-working state and the artificial operation. Means, wherein the control means detects that the cutting operation state detection means has switched from the cutting operation state to the non-cutting operation state, and then operates the automatic raising and lowering instruction means within a set time to control the cutting operation unit to the rising target position. It is characterized in that it is configured to operate the said intermittent operation means to raise up to.

By constructing the lifting device of the mowing machine in this way, the lifting operation of the mowing work unit is executed only according to the instruction of the automatic lifting instruction means only within the preset time after the mowing job is finished, and so on during the mowing operation or after the non-working state continues for a long time. In this case, the rising operation according to the instruction of the automatic elevating instruction means is not performed, and the unexpected rising operation can be prevented from being performed due to the operation error.

(B) A lifting position detecting means for detecting the raising and lowering height of the cutting working portion is provided in the lifting device of the cutting working machine indicated in (A) above, and the cutting of the cutting working portion at the time of operating the automatic lifting indicating means. The height position is within the range of the predetermined cutting height position, and at the same time, the control means is configured such that the operation of the automatic elevating instruction means is performed automatically when the operation of the automatic elevating instruction means is performed within a preset time after the end of the mowing operation. It is also possible. In this way, in order to avoid obstacles such as dung just before the end of the mowing operation, when the mowing operation portion is raised above the predetermined mowing position during the mowing operation, the operation of the automatic elevating instruction means is not executed. Therefore, when the cutting work part is in the middle position of the elevating law (between the lower limit target position and the upper limit target position) between the completion of the mowing operation, the automatic lifting instruction means does not operate unexpectedly against the worker's will. Automatic lifting is prevented.

(C) Further, in the above-described configuration (A), the control means is configured so that the automatic lifting and lowering operation of the harvesting operation part by the operation of the automatic lifting instruction means is executed not only during the setting time after the harvesting operation is completed but also during execution of the mowing operation. It is also possible.

By constructing the control means in this way, in the process of mowing operation, after the end of one stroke of mowing operation in a state where the gap between the obstacle such as the head and the mowing crop at the most downstream side is narrow at the downstream side. There is a possibility that the operation of the automatic elevating instruction means may cause a decrease in work efficiency. Therefore, in order to cope with such a state, the mowing operation part can be lifted up and operated by operating the automatic elevating instruction means while the mowing operation state detecting means detects the mowing operation state. Even when the non-working paper on the downstream side is narrow in the process, the work can be performed very effectively.

(D) Furthermore, it is also possible to provide the lifting device of the harvesting machine having the structure of the above-mentioned (A) with the manual lifting instruction means which performs the operation prior to the operation of the automatic lifting instruction means. By providing such a manual elevating instruction means, if the ascent instruction or descending instruction by the manual elevating instruction means is given while the automatic elevating operation of the mowing work unit based on the instruction of the automatic elevating instruction means is executed, the automatic elevating operation is executed. Stop, and priority is given to the lifting operation based on the instruction of the manual lifting instruction means.

Therefore, during the automatic lifting operation, for example, if the work device may come in contact with an obstacle or the like, the lifting operation according to the instruction of the manual lifting instruction means is executed first, and thus the unexpected lifting operation by the automatic lifting operation is immediately performed. You can stop at.

Suitable Examples of the Invention

Embodiments will be described below with reference to the drawings.

In FIG. 1 a combine is shown as an example of a mowing machine. This combine is equipped with threshing device 3, driving part 4, etc. in the traveling body 2 with right and left crawler driving devices 1R, 1L. The mowing work part 5 is provided with the swinging movement freely to the periphery.

The harvesting operation part 5 is a raising device (6), which causes the planting stem (plant stem) to stand in the standing position as a harvesting target crop, a barley-type cutting device (7) for cutting the stem stem of the raised stem straw, The vertical conveying apparatus 8 etc. which convey to the starting end part of the threshing feed chain 3a in the threshing apparatus 3 of the rear, changing the attitude of the harvested straw of a standing posture to the side which falls sideways gradually, etc. are provided. It is configured by. And the harvesting operation part 5 is comprised by the lifting hydraulic cylinder 9 as a lifting operation means, and a drive lifting operation is comprised freely.

In the longitudinal conveying apparatus 8, the stem starting switch S0 (one example of the cutting operation state detecting means) for detecting the presence or absence of cutting straws to be conveyed is provided at the conveying end. As shown in FIG. 2, the driving electric system for the aircraft has the power of the engine 10 transmitted to the transmission case 12 with the transmission device 11 interposed therebetween. It is comprised so that power may be supplied to left and right crawler runways 1R and 1L, respectively with clutch 13R and 13L in between. Then, the transmission 11 is shifted based on the operation of the shift lever (not shown), and the gas traveling speed is set, and the steering operation of the aircraft is performed by intermittent operation of the left and right steering clutches 13R and 13L. It is. The operation structure of each steering clutch 13R, 13L is demonstrated. Each steering clutch 13R, 13L is comprised so that it may be interrupted operation by the hydraulic cylinders 14R, 14L, and each hydraulic cylinder 14R, 14L is hydraulically controlled by switching operation of the solenoid control valve 15, respectively. . Then, the electronic control valve 15 is operated on the basis of the left and right direction operation of the operation lever 16 (see FIG. 3) in which the driving part 4 is freely oscillated in each of the front and rear directions and the left and right directions. ) Is configured to be switched. That is, as shown in FIG. 3, when the steering levers 17R and 17L are turned on by turning the operating lever 16 pushed back to the neutral position in either of the left and right directions, the control means provided with a microcomputer is used. The control device 18 controls the electromagnetic control valve 15 to cut off the corresponding steering clutches 13R and 13L so that the turning drive is performed.

Next, the control structure in the lifting operation of the harvesting | reaping work part 5 is demonstrated.

The electronic control valve 19 for the lifting hydraulic cylinder 9 is configured to be controlled to be switched to the control device 18, and the lifting operation is performed based on the operation in the front-back direction of the operation lever 16. It is. That is, when the operation lever 16 is rocked in the gaseous direction from the neutral position, the lowering switch 20 or the rising switch 21 is turned ON, and the control device 18 is turned on while the lowering switch 20 is ON. The control signal for lowering is output to the solenoid control valve 19, and a control signal for raising is output to the solenoid control valve 19 while the up switch 21 is ON.

Therefore, the operation lever 16 corresponds to the manual elevating instruction means (or the manual elevating instruction means), and the elevating position of the mowing operation portion 5 is arbitrarily moved by rocking the operation lever 16 back and forth. Can be adjusted manually.

In the handle portion 16a of the operating lever 16, the upper surface is provided with an automatic elevating switch SW as an elevating command means, and the automatic elevating switch SW is constituted by a push button switch which can be operated by a thumb. It is. Then, the control device 18 performs the above operation from the time when the stem movement switch S0 is turned on, that is, when it is detected from the mowing state to the OFF state (non-work state) until the set time elapses. When the automatic elevating switch (SW) is operated, the mowing work unit (5) is automatically raised to the target ascending position, and then the automatic elevating switch (SW) is configured to execute the elevating control to automatically descend to the lowered target position. have. Further, the lifting swing point of the cutting work section 5 has a potentiometer type lifting position sensor 22 for detecting the relative swing angle with respect to the traveling body, that is, the relative lifting position with respect to the body of the cutting work section 5. ) Is provided. Next, the control operation of the first embodiment will be described based on the control flowchart of FIG. 4 and the control timing chart of FIG. When the stem lowering switch S0 is turned on and the mowing operation is being performed, the automatic lifting control is stopped, and even if the automatic lifting switch SW is operated, the automatic lifting is not performed (step 1,2), and the lifting position sensor 22 The detected value (elevation position) is read, and the average value (average cutting work height) for each set time is calculated and stored (steps 3 and 4). In addition, during the mowing operation, the height of the mowing operation portion 5 is adjusted to the appropriate mowing operation height by the ON operation of the lowering switch 20 or the rising switch 21 based on the front and rear operation of the operation lever 16. After the mowing operation in the work administration is completed, the stem lowering switch S0 is switched from ON to OFF, and the automatic lifting and lowering switch elapses from the switching point until the set time t (for example, 5 seconds) elapses. When (SW) is operated, the control means 18 outputs a control signal for raising to the electromagnetic control valve 19 (steps 5 to 6). As shown by P in FIG. 5, in this embodiment, the automatic ascent operation is performed even when the height position of the mowing work portion is between the descending target height and the ascending target height at the time when the automatic lift switch is turned on. In this case, the elevating operation of the mowing operation part 5 is the elevating operation by the ON operation of the raising switch 21 or the lowering switch 20. When the lowering switch 20 or the rising switch 21 is not turned ON and there is no command for manual lifting, the cutting operation unit 5 sets the upper limit as the rising target position based on the detection information of the lifting position sensor 22. Rise up to position. When the harvesting operation unit 5 reaches the upper limit position, the output of the rising control signal is stopped to stop the rising operation (steps 6 to 9). Thereafter, the lowering switch 20 or the rising switch 21 does not turn ON, and the automatic lifting switch SW is operated again at the beginning of the next mowing operation, and the mowing operation part 5 is at the upper limit position or at that time. If it is in the vicinity, the control means 18 outputs the control signal for descending, and descends to the previous harvesting operation position memorize | stored as mentioned above. When the harvesting operation unit 5 reaches the lower limit position, the output of the descending control signal is stopped to stop the lowering operation (steps 10 to 16). Further, if the mowing operation part 5 is not at or near the upper limit position in step 12, the operation is returned to step 1 without performing the lowering operation. Further, whether or not the mowing operation part 5 is at or near the upper limit position is a deviation between the detected value of the lift position sensor 22 at that time and the detected value of the lift position sensor 22 corresponding to the upper limit position. If it is less than the amount, it is determined that the upper limit position or the vicinity. Further, whether the cutting operation unit 5 is at or near the cutting operation height as the lowering target position is determined by the deviation between the detected value of the lifting position sensor 22 and the average value (average cutting operation height) at that time. If it is within, it is judged that it is at or near cutting work height. In this way, the ascending operation of automatically raising from the cutting work position to the upper limit position and the descending operation of automatically descending from the upper limit position to the cutting operation position based on the operation of the automatic lift switch (SW) by a simple operation of pressing by a finger. The operation is done alternately. Further, if there is an ON operation of the down switch 20 or the up switch 21 based on the front and rear swing operation of the operating lever 16, that is, a rising command for rising operation or a falling command for falling operation (see FIG. 4). In this case, the lowering switch 20 is operated), the automatic lifting control is stopped at that time, and the lowering switch 20 is operated). At that time, the automatic lifting control is stopped. Then, the manual lifting operation based on the ON operation of the falling switch 20 or the rising switch 21 is executed (steps 7, 10, 14, 18). That is, the operation of the operation lever 16 is executed in preference to the automatic raising and lowering operation. In this manner, after the automatic elevating control is stopped by the manual elevating operation based on the ON operation of the lowering switch 20 or the elevating switch 21, the elevating operation is not performed even if the automatic elevating switch SW is operated. (Refer to the point Q in FIG. 5), returning to step (1), and when the stem movement switch S0 is determined to be switched from ON to OFF, the auto lift switch ( When SW) is operated, the automatic ascent operation by the automatic lift control is executed. Therefore, after the lowering switch 20 or the rising switch 21 is turned ON, the period until the point at which it is determined that the stem movement switch SO is switched from ON to OFF is determined as the automatic lifting operation prohibition period. Automatic lifting control based on the automatic lifting instruction (command) is stopped. For example, even if the non-working state continues for a long time, when the mowing operation part 5 is driven in the state of being raised to the upper limit position by the operation of the automatic elevating instruction means, and if the automatic elevating instruction means is inadvertently operated. There is a possibility that the harvesting operation section 5 is executed by the lowering operation. In this way, if the automatic elevating switch SW is operated by mistake, the cutting operation unit 5 may be automatically lifted and operated in response to the operator's intention, resulting in an undesirable situation. By cutting 23, the control device 18 does not execute the automatic lifting control based on the automatic lifting switch SW.

Second Embodiment

Although described earlier, in order to avoid obstacles such as dung just before the end of the mowing operation, when the mowing operation is carried out by manually lifting the mowing operation unit 5, the cutting operation unit 5 has more than a predetermined mowing operation position. When it is already raised, there is a case where the automatic raising operation of the mowing operation part 5 based on the operation of the automatic lifting instruction means SW is not necessary. In this way, when the mowing operation part 5 is in the middle position of the lifting range (between the lower limit target position and the upper limit target position) when the mowing operation is completed, the lifting device is operated so that the automatic lifting instruction means does not operate. It can be configured as follows. That is, after the cutting operation of the work administration is finished, the stem lowering switch S0 is switched from ON to OFF, and the automatic lifting switch is made until the set time t (for example, 5 seconds) elapses from the switching point. The control means 18 outputs the rising control signal to the electronic control valve 19 only when the SW is operated and the harvesting work part 5 is at or near the cutting work height at that point. Further, as in the above-described embodiment, whether or not the cutting operation unit 5 is at or near the cutting operation height as the lowering target position is determined by the lifting position sensor 22 at that time, and the average value (average cutting operation height). If the deviation from) is within the set amount, it is judged that the cutting work height is at or near it. The operation procedure of the lifting device in this configuration is shown in FIG. 6 and FIG. As apparent from the flowchart showing the operation procedure of the fourth embodiment, in the operation procedure of the elevator apparatus according to the second embodiment, steps 5 and 5 of the flowchart (Fig. 4) of the first embodiment are shown. Between 6, the step (step 6 of FIG. 6) which confirmed whether the mowing operation part 5 is in the mowing operation position was added. By adding this step, if the height of the mowing operation part 5 at the time which operated the automatic lifting switch SW is in the position which rose above the predetermined mowing position, the mowing operation part 5 does not raise automatically. Therefore, if it is determined as No in step 6, the automatic elevating operation is not performed. However, only in the case where it is determined as Yes in the step 6, the process proceeds to the next step 7 and the automatic raising operation of the harvesting operation part 5 is executed, and the same procedure as in the above-described first embodiment is carried out. Goes. The description after step 6 is omitted here to avoid duplication of explanation. In addition, as indicated by R of the timing chart shown in FIG. 7, in the embodiment, the mowing operation at that time is performed even if the automatic elevating switch SW is operated within the set time t after the mowing operation is stopped. When the height position of the section 5 is at the intermediate position between the lower limit target position and the upper limit target position, the automatic elevating operation is not executed. In this way, if the mowing operation part 5 is not at or near the mowing operation height, the automatic raising operation based on the operation of the automatic lifting position SW is not performed, and the mowing operation part 5 is at or near the upper limit position. If not, the automatic lowering operation based on the operation of the automatic lifting and lowering switch (SW) is prevented from being performed. Therefore, the cutting work unit 5 is automatically raised in the direction contrary to the operator's intention while being in the middle position of the lifting range. It is configured to prevent.

Third Embodiment

Furthermore, as described in the introduction, in order to avoid contact with obstacles (heads, etc.) in the case where the non-working area is narrow at the most downstream side of the mowing process, operate the automatic elevating switch (SW) after finishing one stroke of the mowing operation. It is also possible to configure the control means to be executed in addition to the execution of the cutting operation.

The operation procedure of the elevating device having the control means 18 configured as described above is described with reference to FIGS. 8 and 9 for reference. This procedure is basically the same as that of the second embodiment except that the automatic elevating switch SW is operated and the automatic elevating is executed even when the stem lowering switch SO is ON. That is, in Step 2-4 in Fig. 8, the procedure for operating the automatic lift switch SW in the ON state (i.e., the mowing operation state) of the stem movement switch SO is started. When the stem underfoot switch S0 is ON in step (1), the process proceeds to steps 2 and 3, where the data of the lift position of the harvesting operation unit 5 is read out, and the cutting average height position in the harvesting operation state. Detect. This is the same as steps 2 and 3 in the first and second embodiments. Next, when the automatic lift switch SW is turned ON in step 4, the process proceeds to the next step 6, and it is determined whether or not the position of the mowing operation part 5 at that time is the lower limit position (that is, the range of the mowing operation position). If it is the setting range of the mowing operation position, the automatic raising operation of the mowing operation section 5 is executed in the next step (7). Of course, it is also possible to omit step 6 so that a rise output can be performed even if the harvesting operation part 5 is not in a harvesting operation position (lower limit position). Since the following steps are the same as in the above-described embodiment, redundant description is omitted. Further, the operation state is described in the timing chart (Fig. 9) with reference to this operating state. Particular attention is paid to the symbol S. That is, in the above-described embodiment, the operation of the automatic lift switch SW is not performed when the stem lower switch S0 is in the ON state, but in this embodiment, even though the operating line of the stem lower switch SO is in the ON state, During the operation time of the automatic lift switch SW indicated by S, the operation line of the rising output is turned ON. Moreover, in the operation time of the automatic lift switch SW indicated by S, the operating line segment showing the lift position is raised to the right and the lift state of the harvesting operation part 5 is shown.

In this way, even when the stem underfoot switch S0 is in the ON state, when the mowing operation part 5 is in the mowing operation position, the automatic lifting operation can be executed.

Fourth Embodiment

Further, what is common to the above embodiments is the execution state of the automatic lowering operation of the automatic raising and lowering operation. That is, in the form of all the above-mentioned embodiments, when the automatic elevating switch SW is operated and the switching timing of the stem underfoot switch S0 and / or the harvesting position of the harvesting work part 5 satisfies a predetermined condition. After the automatic raising of the work part 5 was executed, the automatic lowering operation was executed. Furthermore, if there is operation of the manual elevating lever 16 until the next operation of the automatic elevating switch SW even after the mowing operation reaches the upper limit position by the operation of the automatic elevating switch, the mowing portion 5 automatically The descent operation was canceled. That is, in order to automatically lower and lower the mowing operation part 5, a condition such as the manual elevating lever 16 not being operated after the automatic elevating operation is executed, and the working environment needs to be satisfied on a flat surface that is difficult to change. Although there may be no problem in repeating the same mowing operation, it is conceivable that it is preferable to make the automatic lowering operation possible under the conditions other than the above-described embodiments under other working environments. In view of this advantage, in the present embodiment, the automatic descent operation can be executed when the following conditions are satisfied. That is, the automatic lowering operation of the harvesting operation part 5 was made possible by operating the automatic lifting switch SW when the harvesting operation part 5 is in the vicinity of the upper limit position (or the rising target position). In other words, the automatic lowering operation is enabled regardless of whether the automatic raising operation is performed in advance. Here, the control operation of the automatic lift control based on the command of the automatic lift switch SW in the present embodiment will be described with the control flowcharts of FIG. 10 and 10A and 10B. However, the automatic raising operation of the mowing machine can be executed when any of the conditions disclosed in the above embodiments are satisfied. However, in the present embodiment, the conditions disclosed in the above-described third embodiment are adopted for convenience. It was. First, it is determined whether the operating conditions of the automatic lift control are satisfied (step 1). That is, the threshing switch 25 is ON (separate embodiment of the above-mentioned working state detection means), and the engine speed detected by the rotation speed sensor 24 is equal to or higher than a predetermined rotation speed (for example, 500 rpm), At the same time, if the output of the lift position sensor 22 is output at the normal value, it is determined that the operating condition of the automatic lift control is satisfied. Here, the engine speed of the operating condition of the automatic lift control can be set to other reasonable values. Further, even in the non-working state, the operating conditions of the automatic lift control may be established. When the above operating conditions are satisfied and the automatic elevating command is commanded by the automatic elevating switch SW, the elevating position of the mowing work unit 5 is increased from the detected value of the elevating position sensor 22 to the ascending target position or its vicinity. (If it is one example, the position within 150 mm from a rising position), a falling flag is set (steps 2, 3, 4). Next, while the stem movement switch SO is in the ON state or the mowing operation is terminated in a certain working stroke, the stem movement switch S0 is switched from ON to OFF, and the set time (t) ( For example, the rising flag is set if it is until the elapse of 4 seconds (steps 5 and 6). If the rising flag is set, the rising output process is executed. If the falling flag is set, the falling output process is executed (steps 7 to 10). Here, as shown in FIG. 10A, the rising output processing is performed until the lifting position of the harvesting operation part 5 rises to a preset height (for example, within 15 mm from the upper limit position) or when the output time is set in advance ( For example, the rising signal is output to the rising solenoid until more than 3 seconds) and the automatic rising operation is executed. That is, when the lifting position rises to a predetermined height (for example, within 15 mm from the upper limit position) or when the output time elapses for more than a preset time (for example, 3 seconds), the rising flag is cleared (steps 81 to 81). 84). In the lowering output processing, as shown in FIG. 10B, the lifting position of the harvesting operation unit 5 is lowered to a preset height (for example, 450 mm or less from the upper limit position), or the output time is set in advance (e.g., For example, it outputs the falling signal to the falling solenoid until 2 seconds or more elapses and executes the automatic falling operation. That is, when the lifting position descends from the upper limit position to a predetermined height (for example, 450 mm or less) or when the output time elapses for more than a preset time (for example, 2 seconds), the falling flag is cleared (steps 100 to 100). 103). Further, even while the automatic ascending control or the automatic descending control based on the automatic ascending command by the automatic elevating switch SW is being executed, the manual operating lever 16 swings from the neutral position in either the gas forward or rearward direction and the lowering switch. (20) When the ascending switch 21 is turned ON and the manual ascending command is commanded (step 11), execution of the automatic ascent control or the automatic descending control is stopped, and the rising or falling flag is cleared (step 12). The manual raising operation or the manual lowering operation based on the ON operation of the switch 20 or the rising switch 21 is executed first.

[Other Separate Embodiment]

(1) In the above embodiment, although the automatic elevating switch SW as the automatic elevating instruction means is set to the handle portion 16a of the operating lever 16 so as to permit finger operation, the present invention is not limited to this and is a swing type switch. It may be configured as, and may be configured to be provided at a position separate from the operation lever (16).

(2) In the above embodiment, the detection that the cutting operation section 5 has reached the target rising position or the target lowering position is performed by the lifting position sensor 22 provided at the lifting / lowering swing point of the cutting operation section 5, I) Although the configuration is detected as the detection data of the gas height (height to the gas), the target descent position is set as the data of the height (earth height) for the surface, and the height of the surface of the mowing operation part. (Earth height) may be detected and the detection of reaching the target falling position may be determined by the earth height detection value.

(3) In the above embodiment, the average value for each set time of the lifted position sensor 22 in the mowing operation state is used as the lowered target position, but a preset position may be used as the lowered target position.

(4) In the above embodiment, the auto lift control and the auto descent control are alternately executed based on the command of the auto lift switch SW. Instead, the auto lift control is based on the command of the auto lift switch SW. It is good also as a structure which performs only a lowering operation based on operation of the said lowering switch 20. Further, a configuration may be provided in which a dedicated automatic switch for instructing automatic lowering control is provided.

(5) As the working state detection means of the harvesting operation unit 5, it is detected whether there is a stem straw conveyed in the threshing apparatus in place of the stem underfoot switch S0 judged by the existence of the stem straw, and the detection progress thereof is detected. Means for judging whether the mowing operation unit is at a lower position or less than the set position, and for determining whether the mowing apparatus is in a driving state based on the configuration of judging whether the mowing unit is in a lower position below the set position. The mowing operation state detecting means may be constituted by means so as to determine that the mowing operation state is made if these judgments are both positive.

(6) In the above embodiment, although the hydraulic cylinder is used as the lifting operation means of the mowing part 5, an electric motor with a screw feed mechanism may be used instead of the hydraulic cylinder.

(7) Although the combine is illustrated as a harvesting machine in the above embodiment, the present invention is not limited to the combine and can be applied to other harvesting machines such as an orchid harvester. In addition, although the code | symbol is recorded in the term of a claim for easy contrast with drawing, this invention is not limited to the structure of an accompanying drawing by the writing.

Claims (9)

In the lifting device of the harvesting machine having a mowing operation unit (5) and elevating operation means (9) for elevating it between an ascending target position and a descending target position and a control means (18) for controlling the elevating operation means. The apparatus is characterized in that the mowing operation part 5 with respect to the mowing operation state detecting means S0 for detecting whether the mowing operation part 5 is in the mowing operation state and the control means 18 on the basis of artificial manipulation. Is provided with an automatic elevating instruction means (SW) for giving an instruction for elevating, and the control means (18) detects that the mowing operation state detecting means (S0) has switched from the mowing operation state to the non-cutting operation state. A mowing machine, characterized in that for operating the lifting operation means 9 to raise the harvesting operation part 5 to the ascending target position by operating the automatic lifting instruction means SW within a set time. The lifting device The lifting device of the harvesting machine according to claim 1, wherein the lifting device of the harvesting machine is provided with lifting position detecting means 22 for detecting the lifting position of the harvesting machine 5. 3. The cutting height according to claim 2, wherein the cutting height detected by the detecting means 22 of the cutting working portion 5 when the automatic elevating instruction means SW is operated within the set time is in the range of the set height. Lifting device of the mowing machine, characterized in that configured to control the lifting operation means 9 to raise the mowing working part 5 to the ascending target position when there is. 2. The control means (18) according to claim 1, wherein the control means (18) operates the automatic elevating instruction means (SW) when the mowing operation state detection means (S0) detects the operation state of the mowing operation portion (5). Lifting device of the harvesting machine, characterized in that configured to control the lifting operation means (9) to raise the mowing working portion (5) to the ascending target position. The automatic elevating instruction means (SW) according to claim 2, wherein the control device (18) is arranged when the height position of the mowing operation portion (5) detected by the detecting means (22) is at or near the target position (SW). ), The lifting device of the cutting machine, characterized in that configured to control the lifting operation means (9) to lower the cutting operation unit (5) to the lowering target position. 2. The lifting device of the harvesting machine according to claim 1, wherein the lifting device of the harvesting machine is a rising command for raising the harvesting operation unit 5 with respect to the control means 18, and a lowering command for lowering the harvesting operation unit 5; And a manual elevating instruction means 16 for granting any of them, and the control means 18 performs an ascending operation of the mowing operation part 5 based on the operation of the automatic elevating instruction means SW. The elevating operation means 9 for lowering the mowing work part 5 to the descending target position by operating the automatic elevating instruction means SW without operating the manual elevating instruction means 16 afterwards. Lifting device of the mowing machine, characterized in that configured to control the 7. The control means (18) according to claim 6, wherein the control means (18) is configured to execute the elevating operation in preference to the operation by the automatic elevating instruction means (SW) when an ascending or descending instruction is given by the manual elevating instruction means (16). Lifting device for mowing machines, characterized in that The lifting device of the harvesting machine according to claim 5, wherein the lowering target position is an average value for each set time of the detection value of the lifting position detecting means 22 in the mowing operation state. 9. The cutting operation state detecting means (S0) according to any one of claims 1 to 8, characterized in that the cutting operation unit (5) detects in the cutting operation unit (5) whether or not a working state or a non-working state is present. Lifting devices for mowing machines