JP2017023054A - Agricultural implement - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an agricultural implement for preventing muddy water or mud from sticking to a tilling depth display so that a worker can confirm an index indicating a tillage depth.SOLUTION: An agricultural implement according to one embodiment of the invention may comprise: a machine body for rotatably supporting a rotary working part for performing a tillage work; a cover part mounted on the machine body for covering over the rotary working part; an apron arranged rotatably in vertical directions at the rear end of the cover part for leveling soil tilled by the rotary working part; a potentiometer for detecting the rotational angle of the apron; a transmission part for transmitting the information according to the rotational angle of the apron, which is detected by the potentiometer; and a tilling depth display device for receiving the information and displaying indices indicating a plurality of different tillage depths according to the information.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an agricultural machine. In particular, the present invention relates to an agricultural machine having a tilling depth display device.

  A farming machine comprising a first leveling plate for leveling the cultivated soil cultivated by the tilling rotor and a second leveling plate provided at the rear part of the first leveling plate so as to be rotatable in the vertical direction and leveling the cultivated soil surface, for example, In general, a scribing work machine is connected to a rear portion of a travelable vehicle body so as to be movable up and down via a three-point link coupling mechanism, and a scribing work is performed while proceeding with forward travel of the travel machine body. The raising / lowering operation of the substitute working machine is performed by an operator who has boarded the traveling machine body operating an operation switch provided on the traveling machine body.

  When performing shaving work with this shaving machine, if there is unevenness on the farming paddle in the field, the shaving work machine also moves up and down as the traveling machine moves up and down, and the cultivated soil cultivated by the tilling rotor The plowing depth changes. This change in tilling depth adversely affects the growth of rice.

  Therefore, the plowing depth can be made constant by the operator who has boarded the traveling machine body adjusting the vertical position of the substitute work machine by operating the operation switch in accordance with the unevenness of the tiller during the substitute work. However, since the shaving operation is an operation performed by putting water in the field, there is a possibility that the actual plowing depth may be misidentified due to the amount of water and the plowing depth cannot be made constant.

  Therefore, the second leveling plate (leveler) is rotated in the vertical direction with the rotation of the first leveling plate (apron) according to the tilling depth of the cultivated soil cultivated by the tilling rotor. A shaving work machine having a plowing depth display device having an index indicating plowing depth according to the rotation of the rotating link mechanism has been proposed (Patent Document 1). At the time of shaving work, the position of the tilling rotor is accurately adjusted and the tilling depth is kept constant by checking the symbol that is an index indicating the tilling depth on the tilling depth display section of the tilling depth display device. Can do.

JP2012-205519

  By the way, in general, since water is put into the farm field in substitution work, muddy water, mud, and the like may jump to the substitution work machine. And this muddy water and mud are symbols ("1" and "2" in FIG. 13) that are indices indicating plowing depth in the plowing depth display unit 750 of the conventional shaving machine as shown in FIGS. In the case of sticking to the numbers “3” and “4”), there is a problem that the operator cannot read the symbols. For this reason, if the muddy water or mud is attached to the symbol that indicates the plowing depth in the plowing depth display unit and cannot be read, the operator cannot confirm the plowing depth indicator by the shape of the plowing depth display unit. End up. As a result, the operator cannot confirm the index indicating the plowing depth, and the operator cannot mistake the actual plowing depth by the amount of water to make the plowing depth constant. Here, “plowing depth” refers to the distance between the ground surface where no plowing is performed and the bottom surface of the soil dug up by plowing and is expressed in units of “cm” or “mm”. The “index indicating plowing depth” is an index such as a symbol, number, character or the like indicating the degree of “plowing depth” corresponding to “plowing depth”. For example, as shown in FIG. Alternate numbers such as “2”, “3”, and “4” may be used, or stepwise numbers such as “5”, “10”, and “15” may be used. It only needs to be correlated with the tilling depth.

  The present invention is intended to solve the problems associated with the prior art as described above. The purpose of the present invention is to prevent muddy water and mud from adhering to the plowing depth display section, and the operator indicates the plowing depth. It is in place to be able to confirm the indicator.

  According to an embodiment of the present invention, a machine body that rotatably supports a rotary working unit that performs tillage work, a cover unit that is provided on the machine body and covers an upper side of the rotary work unit, and a rear end of the cover part An apron that is disposed in a vertical direction so as to be pivotable in the vertical direction and that leveles the soil cultivated by the rotary working unit, a potentiometer that detects a rotation angle of the apron, and a rotation of the apron detected by the potentiometer. Providing a farm work machine comprising: a transmission unit that transmits information according to a moving angle; and a plowing depth display device that receives the information and displays an index indicating a plurality of different plowing depths according to the information. it can.

  According to another preferred aspect, a machine body that rotatably supports a rotary working part that performs tillage work, a cover part that is provided in the machine body and covers the upper part of the rotary work part, and a rear end part of the cover part An apron that is disposed so as to be pivotable in the vertical direction and lands the cultivated soil plowed by the rotary working unit, and one end side thereof is pivotally provided on the apron, and rotates in the vertical direction as the apron rotates. A link mechanism section that moves, a one end side of the link mechanism section is rotatably provided, a potentiometer that detects a rotation angle of the link mechanism section, and a rotation angle of the link mechanism section detected by the potentiometer. There is provided an agricultural machine including a transmission unit that transmits information according to the information, and a tilling depth display device that receives the information and displays an index indicating a plurality of different tilling depths according to the information. It may be.

  According to another preferable aspect, the plowing depth display device includes a plowing depth display unit that displays an index that indicates a plowing depth, and the plowing depth display unit includes a plurality of plows that correspond to the indexes that indicate the plurality of different plowing depths. There may be provided an agricultural machine characterized by having a lamp.

  According to the plowing depth display device for an agricultural machine according to the present invention, muddy water or mud does not adhere to the plowing depth display unit, and the operator can check the index indicating the plowing depth.

It is a partial structure figure by the side of the scribing work machine concerning one embodiment of the present invention. It is a partial top view of the scribing work machine concerning one embodiment of the present invention. It is a top view of the working depth display device concerning one embodiment of the present invention. It is a structure figure of the side of the shaving work machine for demonstrating the display method of the tilling depth display part which concerns on one Embodiment of this invention. It is a structure figure of the side of the shaving work machine for demonstrating the action | operation of the working depth display apparatus when a working depth is comparatively shallow. It is a structure figure by the side of the shaving machine for demonstrating the action | operation of the tilling depth display apparatus when the tilling depth is comparatively deep. It is a top view of the working depth display apparatus concerning other embodiments of the present invention. It is a top view of the working depth display apparatus concerning other embodiments of the present invention. It is a top view of the working depth display apparatus concerning other embodiments of the present invention. It is a top view of the working depth display apparatus concerning other embodiments of the present invention. It is a partial structure figure of the side of the scribing work machine concerning other embodiments of the present invention. It is a partial structure figure by the side of the shaving work machine by which the conventional tilling depth display apparatus was mounted. It is a top view of the plowing depth display part of the plowing depth display apparatus of the conventional shaving work machine.

  Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. The following embodiments are examples of the embodiments of the present invention, and the present invention is not limited to these embodiments. Note that in the drawings referred to in this embodiment, the same portion or a portion having a similar function is denoted by the same reference symbol or a similar reference symbol (a reference symbol simply including A, B, etc. after a number) and repeated. The description of may be omitted. If there are parts with similar functions on the left and right, the one on the left is suffixed with “L”, the one on the right is suffixed with “R”, Even when both are called together or when they are called singly, a suffix may not be added. In addition, the dimensional ratio in the drawing may be different from the actual ratio for convenience of explanation, or a part of the configuration may be omitted from the drawing. In addition, for convenience of explanation, the description will be made using the terms “upper” or “lower”, but the upper and lower parts respectively indicate directions in the working state of the work implement. Similarly, the term “front” or “rear” will be used for description, but the front indicates the direction of the traveling machine that pulls the working machine relative to the work machine, and the rear indicates the direction of the working machine relative to the traveling machine.

<First Embodiment>
Hereinafter, preferred embodiments of the present invention will be described with reference to FIGS. The present embodiment will be described by taking as an example a proxy-working machine capable of folding and unfolding left and right work bodies on both sides of the work-machine main body. Before explaining the plowing depth display device, first, the scribing work machine will be described with reference to FIG. 1 (side view structure diagram) and FIG. 2 (plan view).

[Configuration of the shaving machine]
FIG. 1 is a partial structure diagram for explaining the configuration of a substitute working machine in a working state according to an embodiment of the present invention. FIG. 2 is a partial plan view showing the overall configuration of the scribing work machine in the working state according to one embodiment of the present invention. The substitute working machine 1 includes a work machine main body 100, an extended work body 200, a switching unit 300, a connecting unit 400, and a rotary working unit 600. As shown in FIG. 1 and FIG. 2, the substitute working machine 1 is attached to the rear part of the traveling machine body 90 and advances along with the forward traveling of the traveling machine body 90 to perform the substitute work. A work implement main body 100 disposed at the center of the direction, and a left extension work body 200L and a right extension work body 200R attached to the left and right ends so as to be pivotable in the vertical direction. The extension work body 200L and the right extension work body 200R form a three-part structure. Hereinafter, the left extension work body 200L and the right extension work body 200R may be collectively or independently referred to as the extension work body 200.

  The work machine main body 100 includes a shield cover 110, an apron 120 (first leveling plate), and a leveler 130 (second leveling plate).

  The work machine main body 100 has a three-point link connecting mechanism (not shown) provided at the rear of the traveling machine body 90 connected to the front part of the machine body 5 having the main frame 3 extending in the left-right direction. It is mounted so that it can be raised and lowered. A gear box 6 having an input shaft 6a that protrudes forward is provided at the central portion in the left-right direction of the main frame 3, and from a PTO (Power Take Off) shaft of the traveling machine body 90 via a power transmission means such as a universal joint. Power is transmitted to the input shaft 6a.

  A transmission frame (chain case) 8 and a side frame are suspended from the left and right ends of the main frame 3, and a rotary working unit 600 having a number of tillage claws attached between the transmission frame 8 and the lower part of the side frame rotates. It is supported freely. A transmission mechanism is provided in the main frame 3, and this transmission mechanism is connected to the transmission mechanism in the transmission frame 8, so that the power transmitted to the input shaft 6 a is rotated through the transmission mechanism. The work unit 600, the left extension work unit 200L, and the left rotary work unit 600L provided on the right extension work unit 200R are transmitted to the right rotary work unit 600R to be transmitted to the rotary work unit 600 and the left extension work unit 200L of the work machine body 100. The left rotary working unit 600L and the right rotary working unit 600R provided on the right extension working body 200R are configured to rotate in a predetermined direction.

  The extension work body 200 is connected to the work machine main body 100 so that the substitute work machine 1 can be switched between a storage state and a work state. Here, the storage state is a state in which the work machine has a reduced width in a direction orthogonal to the traveling direction of the traveling machine. Specifically, a state where the extended working body 200 is folded by rotating (rotating) with respect to the work machine main body 100 is referred to as a storage state. The working state is a state in which the working machine is extended in a direction orthogonal to the traveling direction of the traveling machine. Specifically, the extended working body 200 is rotated with respect to the work machine main body 100 from the housed state, and the unfolded state is referred to as a working state.

  The extension work body 200 includes an extension shield cover 210, an extension apron 220, and an extension leveler 230, similar to the work machine body 100. The extension shield cover 210 is provided above the tilling rotor provided corresponding to the extension work body 200 in the rotary working part 600 that rotates a work claw (not shown). The extension apron 220 is provided behind the tillage rotor, and is connected to the extension shield cover 210 so as to be rotatable about the connection portion 222 as an axis. The extension leveler 230 is provided behind the tilling rotor, and is connected to the extension apron 220 so as to be rotatable about the connection portion 232 as an axis. The extended apron 220 is interlocked with the apron 120 and suppresses the scattered matter scattered by the work of the rotary working unit 600 from being released to the outside. The extension leveler 230 works with the leveler 130 to level the soil cultivated by the work of the rotary working unit 600.

  The switching unit 300 includes a control cylinder (not shown) and a connection unit 320, and switches the storage state and the working state by rotating the extension work body 200 with respect to the work implement main body 100. One end of the control cylinder is connected to the work machine main body 100 and the other end is rotatably connected to a connection portion 312 fixed to the extension work body 200. The extended working body 200 is folded and switched to the retracted state when the control cylinder contracts, and is expanded and switched to the working state when the control cylinder extends.

  The connecting portion 400 is attached to the leveler 130 of the work machine main body 100 and the extension leveler 230 of the extension work body 200, and the apron in the rotation direction of the leveler 130 with respect to the apron 120 or the rotation direction of the extension leveler 230 with respect to the extension apron 220. The relative operating range of 120 and extended apron 220 is regulated. That is, the connection part 400 makes the leveler 130 and the extension leveler 230 interlock. In addition, the connecting portion 400 includes a locking portion 410 attached to the extension leveler 230 and a receiving portion 420 attached to the leveler 130.

  Here, the rotary working unit 600 (see FIG. 1) has a work claw (not shown), and the work claw is rotated by the power transmitted to the input shaft 6a and cultivates the soil by acting on the soil. Or stir. In FIG. 1, a range in which the work claw rotates is shown as a rotation range 612.

  At the end portion of the extension leveler 230, a leveler extension portion 510 that can further widen the width that can be leveled is provided. The leveler extension 510 is pivotally connected to the extension leveler 230. Further, the leveler extension 510 extends in a direction inclined with respect to the extending direction of the leveler 130 and the extension leveler 230 (has a longitudinal length).

  In addition, an earthing board (not shown) is provided on the traveling machine side of the shield cover 110. The earthing board (not shown) is attached so as to be slidable in a direction orthogonal to the traveling direction of the traveling machine. A mulch board (not shown) is installed in accordance with the position of the wheel of the traveling machine, etc., when using the shaving work machine 1, and relieves the level difference caused by the dredge.

[Configuration of tillage display device]
The plowing depth display device 50 will be described with reference to FIG. FIG. 3 is a plan view of a tilling depth display device according to an embodiment of the present invention. The plowing depth display device 50 includes a plowing depth display unit 51 and a receiving unit 52. Further, the tilling depth display device 50 is a remote controller. Therefore, the operator can get on the traveling machine body 90 with the plowing depth display device 50 in his / her hand. The tilling depth display unit 51 displays an index indicating the tilling depth. In this example, the tilling depth display unit 51 has 11 LEDs (lamps). Among the 11 LEDs, there is a description “deep” on the top LED. On the other hand, among the 11 LEDs, there is a description “shallow” under the lowest LED. “Deep” means that the tilling depth is deep, and “shallow” means that the tilling depth is shallow. In this example, since there are 11 LEDs, there are 11 plowing stages. The stage of plowing is not limited to 11 stages, and may be two or more. Moreover, the color of LED may be any color. Furthermore, the colors of the 11 LEDs may all be the same color, all may be different colors, or a plurality may be the same color.

  Thus, the tilling depth display device 50 is a remote controller. Therefore, the operator can get on the traveling machine body 90 with the plowing depth display device 50 in his / her hand. The tilling depth display device 50 is usually placed near the boarding position of the operator of the traveling machine body 90. Therefore, there is no possibility that muddy water and mud adhere to the plowing depth display unit 51 of the plowing depth display device 50. Therefore, according to this embodiment, muddy water and mud do not adhere to the tilling depth display unit, and the operator can confirm the index indicating the tilling depth. Further, since the tilling depth display device 50 is near the worker, the worker can check the tilling depth without having to look back and the like during the work. Furthermore, since the LED is turned on, an index indicating the tilling depth can be confirmed even in a dark environment such as at night.

  It should be noted that when the “leveler squeeze” button shown in FIG. 3 is pressed, “powdering” is entered, and when “powdering” is pressed, the squeezing is entered. When the “extension leveler” button “close” is pressed, the extension leveler is closed, and when “open” is pressed, the extension leveler is opened. Further, when the “work machine” button “close” is pressed, the work machine is closed, and when “open” is pressed, the work machine is opened.

[Display method of tilling depth display]
Here, a display method of the tilling depth display unit 51 will be described. FIG. 4 is a structural diagram of the side of the scribing work machine for explaining the display method of the tilling depth display unit according to the embodiment of the present invention. An attachment portion 44 is attached on the apron 120, and a link mechanism portion 42 is rotatably provided on one end side of the attachment portion 44. But the link mechanism part 42 may be directly attached on the apron 120. Further, the other end side of the link portion mechanism portion 42 is rotatably connected to the potentiometer 70.

  When the apron 120 rotates in the vertical direction, the link mechanism portion 41 rotates in the vertical direction with the shaft portion 42 as a rotation fulcrum. When the plowing depth is increased, the apron 120 rotates upward. When the apron 120 is rotated upward, the link mechanism unit 42 is rotated upward. When the link mechanism portion 42 rotates upward, the potentiometer 70 rotates clockwise as viewed in FIG. When the potentiometer 70 is rotated in the clockwise direction as viewed in FIG. 4, the resistance of the potentiometer 70 is changed, and this change is taken out as a voltage change and input to the control box 80 including the transmission unit. The value of the voltage change input to the control box 80 is converted into a digital signal, wirelessly transmitted to the tilling depth display device 50, and received by the receiving unit 52. Then, the tilling depth display device 50 turns on the LED corresponding to the digital signal.

  On the other hand, when the apron 120 is rotated downward, the link mechanism portion 42 is rotated downward. When the link mechanism portion 42 is rotated downward, the potentiometer 70 is rotated counterclockwise as viewed in FIG. When the potentiometer 70 is rotated in the counterclockwise direction as viewed in FIG. 4, the resistance of the potentiometer 70 is changed, and this change is taken out as a voltage change and input to the control box including the transmission unit. The value of the voltage change input to the control box is converted into a digital signal, wirelessly transmitted to the tilling depth display device 50, and received by the receiving unit 52. Then, the tilling depth display device 50 turns on the LED corresponding to the digital signal.

  In the present embodiment, the digital signal is wirelessly transmitted to the tilling depth display device 50, but is not limited to wireless, and may be transmitted by wire.

  Next, the relationship between the index indicated by the tilling depth display unit 51 of the tilling depth display device 50 and the tilling depth D of the tilled soil by the rotary working unit 600 will be described with reference to FIGS. 5 and 6. As shown in FIG. 5, when the plowing depth D of the cultivated soil by the rotary working unit 600 is shallow (D = about 100 mm in the drawing), the plowing depth display device 50 has an angle θ relative to the field surface (drawing). Then, it is inclined with θ = about 44 °. With the rotation of the apron 120, the leveler 130 rotates with respect to the apron 120, and the leveler 130 has an angle α (α = about 136 ° in the drawing) with respect to the apron 120 on the field surface. Ground. Further, the link mechanism 41 rotates in the vertical direction as the apron 120 rotates, and the potentiometer 70 rotates as the link mechanism 41 rotates. As described above, the LED corresponding to the tilling depth is turned on as the potentiometer 70 rotates.

  On the other hand, when the plowing depth D is relatively deep (D = about 200 mm in the drawing), as shown in FIG. 6, the apron 120 rotates more upward than the case of FIG. And tilted at an angle θ ′ smaller than the angle θ (θ ′ = about 23 ° in the drawing) with respect to the field surface. As the apron 120 rotates, the leveler 130 contacts the field surface with an angle α ′ (α ′ = about 157 ° in the drawing) with respect to the apron 120. Further, the link mechanism 41 rotates in the vertical direction as the apron 120 rotates, and the potentiometer 70 rotates as the link mechanism 41 rotates. As described above, the LED corresponding to the tilling depth is turned on as the potentiometer 70 rotates.

  As described above, in the plowing depth display device 50 of the present invention, the apron 120 rotates according to the depth of the plowing depth D, and the link mechanism 41 rotates in the vertical direction as the apron 120 rotates. Then, the potentiometer 70 is rotated. Then, as the potentiometer 70 rotates, the LED corresponding to the tilling depth is turned on. Further, the tilling depth display device 50 is usually near the worker who has boarded the traveling machine body 90. Therefore, the operator can confirm the degree of tilling depth by confirming which LED of the tilling depth display unit 51 of the tilling depth display device 50 is lit. Therefore, when the lighting of the LED is shifted to the character side of “deep” during the substitution work, the worker lifts the substitution work machine 1 through the three-point link coupling mechanism so that the working depth is shallow. Perform the operation. Also, when the lighting of the LED is shifted to the “shallow” character side during the substitution work, the worker lowers the substitution work machine 1 downward via the three-point link coupling mechanism so as to deepen the working depth. Operate. Therefore, the plowing depth at the time of the shaving work can be made constant.

<Comparative example>
FIG. 12 is a structural diagram of the side surface side of a shaving work machine equipped with a conventional tilling depth display device. FIG. 13: is a top view of the tilling depth display part of the tilling depth display apparatus of the conventional shaving work machine. On the display board of the conventional tilling depth display section, there are letters “earthing” and numbers “1”, “2”, “3” and “4” indicating the degree of tilling depth. When the plowing depth changes, the pointer arm moves, and the index indicating the plowing depth indicated by the pointer changes. Therefore, the operator was able to confirm the degree of tilling depth by confirming the above symbol indicated by the pointer. However, the position of the tilling depth display device 750 is a place where muddy water or mud may splash and adhere. For this reason, if muddy water or mud is attached to a number that is an index indicating the plowing depth, the operator cannot read the number itself. As a result, the operator cannot confirm the degree of tilling depth, and the operator cannot mistake the actual tilling depth by the amount of water and cannot keep the tilling depth constant. Moreover, since the position of the plowing depth display device 750 is behind the operator who is working, it is inconvenient because the operator cannot see the plowing depth display device 750 unless he looks back. .

Second Embodiment
FIG. 7 is a plan view of a tilling depth display device according to another embodiment of the present invention. The plowing depth display device 50A has almost the same configuration as the plowing depth display device 50 of the first embodiment, but differs from the first embodiment in that it has a plowing depth display unit 51A. Here, description of overlapping points is omitted, and only different points will be described.

  The tilling depth display 51A is a liquid crystal. The plowing depth display unit 51A displays a number of rectangles corresponding to the plowing depth. In this example, when the tilling depth is shallow, the number of rectangles is small, and when the tilling depth is deep, many rectangles are displayed. However, the display method is not limited to a rectangle, and may be any shape. The plowing depth display unit 51A may be an LCD (Liquid Crystal Display) or an organic EL display, and may be anything as long as it can perform display corresponding to the plowing depth.

  Also in this embodiment, as in the first embodiment, the tilling depth display device 50 </ b> A is usually placed near the boarding position of the operator of the traveling machine body 90. The liquid crystal has a certain level of brightness. Therefore, this embodiment also has the same effect as described in the first embodiment.

<Third Embodiment>
FIG. 8 is a plan view of a tilling depth display device according to another embodiment of the present invention. The plowing depth display device 50B has almost the same configuration as the plowing depth display device 50A of the second embodiment, but differs from the second embodiment in that the display of the plowing depth display unit 51B is a character. Here, description of overlapping points is omitted, and only different points will be described.

  The tilling depth display unit 51B is a liquid crystal. The tilling depth display unit 51B displays a number corresponding to the tilling depth. In this example, when the tilling depth is shallow, a number close to “1” is displayed, and when the tilling depth is deeper, a larger number is displayed. In this example, numbers are displayed, but the present invention is not limited to this, and characters such as alphabets may be used.

  Also in the present embodiment, as in the first embodiment and the second embodiment, the tilling depth display device 50B is usually placed near the boarding position of the operator of the traveling machine body 90. The liquid crystal has a certain level of brightness. Therefore, this embodiment also has the same effect as described in the first embodiment.

<Fourth embodiment>
FIG. 9A is a plan view of a tilling depth display device according to another embodiment of the present invention. The tillage depth display device 50 </ b> C is a GPS guide monitor in this example, and is attached to the traveling machine body 90. Here, description of overlapping points is omitted, and only different points will be described.

  The tilling depth display unit 51C is a liquid crystal. The plowing depth display unit 51C displays a graphic corresponding to the plowing depth. In this example, when the tilling depth is shallow, the number of rectangles is small, and when the tilling depth is deep, many rectangles are displayed. However, the display method is not limited to a rectangle, and may be any shape. The tilling depth display device 50 </ b> C may be attached to the traveling machine body 90.

  Also in this embodiment, as in the first to third embodiments, the tilling depth display device 50C is usually placed in the vicinity of the riding position of the operator of the traveling machine body 90. The liquid crystal has a certain level of brightness. Therefore, this embodiment also has the same effect as described in the first embodiment.

<Fifth Embodiment>
FIG. 9B is a plan view of a tilling depth display device according to another embodiment of the present invention. The plowing depth display device 50D has almost the same configuration as the plowing depth display device 50C of the fourth embodiment, but differs from the fourth embodiment in that the display of the plowing depth display device D is characters. Here, description of overlapping points is omitted, and only different points will be described.

  The working depth display unit 51D is a liquid crystal. The plowing depth display unit 51D displays a number corresponding to the plowing depth. In this example, when the tilling depth is shallow, a number close to “1” is displayed, and when the tilling depth is deeper, a larger number is displayed. In this example, numbers are displayed, but the present invention is not limited to this, and characters such as alphabets may be used.

  Also in this embodiment, as in the first to fourth embodiments, the tilling depth display device 50D is usually placed near the boarding position of the operator of the traveling machine body 90. The liquid crystal has a certain level of brightness. Therefore, this embodiment also has the same effect as described in the first embodiment.

<Sixth Embodiment>
FIG. 10 is a plan view of a tilling depth display device according to another embodiment of the present invention. The tilling depth display device 50E has almost the same configuration as the tilling depth display device 50D of the fifth embodiment, but differs from the fifth embodiment in that the display of the tilling depth display device D is an image. Here, description of overlapping points is omitted, and only different points will be described.

  The tilling depth display unit 51E is a liquid crystal. The plowing depth display unit 51E displays an image corresponding to the plowing depth. In this example, when the plowing depth is shallow, an image showing when the plow working machine is shallow is displayed, and when the plowing depth is deep, an image showing when the plow working machine is deep is displayed.

  Also in this embodiment, as in the first to fifth embodiments, the tilling depth display device 50E is usually placed near the boarding position of the operator of the traveling machine body 90. The liquid crystal has a certain level of brightness. Therefore, this embodiment also has the same effect as described in the first embodiment.

  In addition, from 4th Embodiment to 6th Embodiment, although the plowing depth display apparatus demonstrated that it was a liquid crystal display device, this liquid crystal display apparatus may be installed in the traveling body, a smart phone, a tablet terminal, etc. It does not need to be installed in the traveling machine body.

<Seventh embodiment>
FIG. 11 is a partial structural view of a side surface side of a scribing work machine according to another embodiment of the present invention. This embodiment is substantially the same as the first embodiment. Therefore, only differences from the first embodiment will be described in detail.

  This embodiment is different from the first embodiment in that the potentiometer 70A is directly provided on the rotational axis of the apron 120. Since the potentiometer 70A is directly provided on the rotational axis of the apron 120, the seventh embodiment does not have the link mechanism portion 41 and the attachment portion 42 that the first embodiment has. The potentiometer 70 </ b> A rotates as the apron 120 rotates. Therefore, the potentiometer 70A can detect the rotation angle of the apron 120.

  In this embodiment as well, as in the first embodiment, the tilling depth display device is usually placed near the boarding position of the operator of the traveling machine body. Therefore, this embodiment also has the same effect as described in the first embodiment.

  It is also possible to apply the tilling depth display device of the second embodiment to the sixth embodiment to the shaving work machine of the seventh embodiment.

  Although the first embodiment to the seventh embodiment have been described by using a substitute working machine, the plowing depth display device according to the present invention is not limited to the substitute working machine, and may be another agricultural work machine. . For example, even if it is a rotary working machine which is an agricultural working machine which does not contain a leveler like the substitute working machine 1, if the link mechanism part rotates with rotation of the apron, the working depth in the present invention A display device is applicable.

  Further, the present invention is not limited to the above-described embodiment, and can be changed as appropriate without departing from the spirit of the present invention.

DESCRIPTION OF SYMBOLS 1, 7: Oyster work machine 3: Main frame 5: Airframe 6: Gear box 6a: Input shaft 8: Transmission frame 9: Hitch 41: Link mechanism part 42: Turning fulcrum 44: Mounting part
50, 50A, 50B, 50C, 50D, 50E: Plowing depth display device 51, 51A, 51B, 51C, 51D, 51E: Plowing depth display unit 52, 52A, 52B, 52C, 52D, 52E: Receiving unit 70: Potentiometer 80 : Control box 90: Traveling aircraft
100: Work machine body 110: Shield cover 120: Apron
130: Leveler 140: Rake
200: extension work body 230: extension leveler 300: switching part 400: connection part 600: rotary work part 703: main frame 706: gear box 706a: input shaft 711: apron 712: leveler 713: rotary work part 740: working depth display Device 741: Link mechanism portion 742: Swing arm 743, 756: Shaft portion 744: Connecting rod 750: Plowing depth display portion 751: Display plate 757: Pointer 759: Guide plate

Claims (3)

An airframe that rotatably supports a rotary working section that performs tillage work;
A cover part provided on the machine body and covering an upper part of the rotary working part;
An apron disposed at the rear end of the cover portion so as to be rotatable in the vertical direction and leveling the cultivated soil cultivated by the rotary working portion;
A potentiometer for detecting the rotation angle of the apron;
A transmission unit for transmitting information according to the rotation angle of the apron detected by the potentiometer;
A farm working machine comprising: a plowing depth display device that receives the information and displays an index indicating a plurality of different plowing depths according to the information. An airframe that rotatably supports a rotary working section that performs tillage work;
A cover part provided on the machine body and covering an upper part of the rotary working part;
An apron disposed at the rear end of the cover portion so as to be rotatable in the vertical direction and leveling the cultivated soil cultivated by the rotary working portion;
One end side is rotatably provided in the apron, and a link mechanism portion that rotates in the vertical direction as the apron rotates,
A potentiometer, one end side of which is rotatably provided in the link mechanism, and detects a rotation angle of the link mechanism,
A transmission unit that transmits information according to the rotation angle of the link mechanism unit detected by the potentiometer;
A farm working machine comprising: a plowing depth display device that receives the information and displays an index indicating a plurality of different plowing depths according to the information. The plowing depth display device includes a plowing depth display unit that displays an index indicating the plowing depth,
The agricultural working machine according to claim 1 or 2, wherein the plowing depth display unit includes a plurality of lamps corresponding to the indexes indicating the plurality of different plowing depths.

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