JP2012196150A - Working vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a working vehicle capable of smoothly conducting farm work without causing such situations as the cloggings and/or damage of a ditching machine due to the machine body's backward movement even in case of forgetting the raising operation of a working apparatus such as a seedling planting part or seeder set up liftably.SOLUTION: A seedling transplanter is provided, being such that the working vehicle is mounted with: a link mechanism liftably supporting a working apparatus 4 and its lift position-sensing member; a granule feeder 5 for feeding granules to the ditching machine equipped in the working apparatus 4; a traveling control lever 73 conducting vehicle speed selection in the vehicle's forward/backward movement and the supporting height regulation of the link mechanism and the lever's traveling control-sensing member 73S; a rear wheel rotation-sensing member; an informative member 71; and an information-halting switch 72 laid on the working apparatus 4. In this seeding transplanter, such a control mechanism is constructed that, when all of the three conditions, i.e. the link mechanism is at a defined height or lower, the traveling control lever 73 is at backward movement vehicle speed position, and the rear wheel 11 is under rotation, are met, the informative member 71 is operated until operating the information-halting switch 72.

Description

The present invention relates to a work vehicle that performs a farm work by mounting a work device so that the work apparatus can be moved up and down.

  The seeding machine described in the prior art document 1 and the seedling transplanting machine described in the prior art document 2 are both provided with a grooving device protruding from the lower part of the working device supported by the link mechanism so as to be lifted and lowered. The seed and fertilizer supplied from the fertilizer hopper and the sowing hopper are thrown into the groove while forming a groove into which the seed and fertilizer enter the field as the aircraft moves, while descending to the working height position. Can do.

JP 2010-193727 A JP 2009-268418 A

  However, since the seeding machine and the seedling transplanting machine described in the prior art documents 1 and 2 can be moved backward in a state where the ascending operation of the working device such as the seedling planting part or the seeding machine is forgotten, it can be moved backward as it is. There is a problem that mud is clogged in the grooving device in contact with the field scene, so that seeds and fertilizer cannot be sent out or the grooving device is damaged. As a result, interruption of the field work causes confusion in the subsequent work process.

  The object of the present invention is to prevent clogging or breakage of the grooving machine due to the backward movement of the machine body even when the lifting operation of the working device such as the seedling planting part and the sowing machine mounted so as to be movable up and down is forgotten. An object of the present invention is to provide a work vehicle that can smoothly carry out field work.

  The invention according to claim 1 includes a traveling vehicle body 2 provided with front wheels and rear wheels that travel on a farm field, a link mechanism 3 that supports a farm work device 4 on a rear portion of the traveling vehicle body 2 so as to be movable up and down, and The granular material supply device 5 for supplying the granular material to the working device 4 and the granular material received from the granular material supplying device 5 are thrown into the groove while protruding from the lower portion of the working device 4 to form a groove in the field. In a work vehicle provided with a grooving device 57, a travel operation lever 73 that performs forward / backward vehicle speed selection and support height adjustment of the link mechanism 3, and a rear wheel rotation detection member 11a that detects rotation of a rear wheel, The raising / lowering position detecting member 3s for detecting the raising / lowering position of the link mechanism 3, the traveling operation detecting member 73s for detecting the operation position of the traveling operation lever 73, the notification member 71 for the boarding operator, and the work device 4 are disposed. To stop the notification operation of the notification member 71. The stop mechanism 72 is provided, the link mechanism 3 is below a predetermined height by the elevation position detection member 3s, the travel operation lever 73 is moved backward by the travel operation detection member 73s, and the rear wheel rotation detection member 11a is moved rearward. When the wheel 11 meets all three rotation conditions, the notification member 71 is activated until the notification stop switch 72 is operated.

  In the above work vehicle, when the airframe starts to reverse by operating the reverse lever while the link mechanism does not rise to the predetermined height, the notification member is operated until the switch is operated. Therefore, the airframe is moved backward to return to the turning start position. At this time, the operator is informed that the link mechanism is forgotten to be raised.

  The invention of claim 2 is the configuration of claim 1, wherein the working device 4 is a seedling transplanting device for planting a loaded seedling in a field, and the seedling transplanting device is provided with a seedling reduction detecting member 51s for detecting a decrease in the loaded seedling, When the decrease of the loaded seedling is detected by the seedling decrease detection member 51s, when the travel operation lever 73 is in the neutral operation position following the forward operation position by the travel operation detection member 73s, and similarly the decrease of the loaded seedling is detected. In the case where it is detected and the travel operation lever 73 is at the reverse operation position by the travel operation detection member 73s and the rear wheel 11 is rotated by the rear wheel rotation detection member 11a, the notification member is within that range. 71 is configured to operate.

  In the work vehicle, when the seedling reduction detecting member detects a decrease in seedlings of the seedling transplanting device, the notification member is activated when the traveling operation lever is operated from “advance” to “neutral”, and the traveling operation lever Is switched from “neutral” to “reverse”, and when the rotation of the rear wheel is detected, the notification member is activated, so when stopping at the field end and when moving the aircraft backward to return to the turning start position In addition, the operator is encouraged to replenish seedlings, and the forgetting to replenish is informed.

  According to a third aspect of the present invention, in the configuration of any one of the first and second aspects, the granular material supply device 5 is provided with a granular material detection member 5s for detecting a decrease in granular material, and the granular material detection member 5s. When the decrease in granular material is detected by the traveling operation detecting member 73s in the neutral operation position following the forward operation position, and when the decrease in granular material is detected in the same manner In any case where the traveling operation lever 73 is in the reverse operation position by the operation detection member 73s and the rear wheel 11 is in rotation by the rear wheel rotation detection member 11a, the notification member 71 is operated within that range. It is characterized by that.

  In the work vehicle, when the granular material detection member detects that the granular material stored in the granular material supply device that supplies the granular material has decreased, the traveling operation lever is operated from “advance” to “neutral”. When the notification member is activated, the travel control lever is switched from “neutral” to “reverse”, and when the rear wheel rotation detection member detects the rotation of the rear wheel, the notification member is activated and stops at the end of the field. When the aircraft is moved backward to return to the turning start position, the operator is prompted to replenish the granular material, and the forgetting of replenishment is notified.

  According to a fourth aspect of the present invention, in the configuration according to any one of the first to third aspects, the clogging detection member 5t that detects clogging of the granular material is provided in the granular material supply device 5 that supplies the granular material, and this clogging detection is performed. When the clogging of the granular material is detected by the member 5t, when the traveling operation detection member 73s is in the neutral operation position following the forward operation position, and when the clogging of the granular material is similarly detected. The travel operation lever 73 is in the reverse operation position by the travel operation detection member 73s, and the notification member 71 is operated within that range regardless of whether the rear wheel 11 is rotating by the rear wheel rotation detection member 11a. It is characterized by that.

  In the work vehicle, when the clogging detection member detects that the granular material stored in the granular material supply device is clogged, the notification member is activated when the traveling operation lever is operated from “advance” to “neutral”. In addition, when the travel operation lever is switched from “neutral” to “reverse” and the rear wheel rotation detection member detects the rotation of the rear wheel, the notification member is activated. When the machine is moved backward to return to the start position, the operator is urged to clear the clogging of the granular material, and is notified that the clogging has been forgotten.

  According to a fifth aspect of the present invention, in the configuration according to any one of the first to fourth aspects, the traveling vehicle body 2 is provided with a fuel tank and a remaining amount detecting member 20s for detecting a decrease in the remaining amount, and the remaining amount is detected. Traveling when the fuel decrease is detected by the member 20s and the travel operation lever 73 is in the neutral operation position following the forward operation position by the travel operation detecting member 73s, and when the fuel decrease is detected similarly. In any case where the traveling operation lever 73 is in the reverse operation position by the operation detection member 73s and the rear wheel 11 is in rotation by the rear wheel rotation detection member 11a, the notification member 71 is operated within that range. It is characterized by that.

  When the remaining amount detecting member detects a decrease in the remaining amount of fuel, the notification member is activated when the traveling operation lever is operated from “forward” to “neutral”, and the traveling operation lever is “neutral”. When the rear wheel rotation detection member detects the rotation of the rear wheel, the notification member is activated, so when stopping at the field end and when moving the aircraft backward to return to the turning start position. In addition, it prompts the operator to replenish the fuel and informs the operator that he has forgotten to replenish the fuel.

  According to the first aspect of the invention, when the airframe starts reverse operation by reverse lever operation without the link mechanism rising to a predetermined height, the notification member is operated until the switch is operated, so that the airframe is moved backward to return to the turning start position. When this happens, the operator is informed that the link mechanism has been forgotten to be raised, so that the work vehicle can respond immediately by stopping the brake operation or raising the work implement by operating the lever, including the case of incorrect lever operation. Can avoid the situation where the groover provided in the lower part of the working device touches the farm scene or moves backward when approaching the farm scene, and the groover is clogged by mud or contacted with the farm scene. The field work can be facilitated while preventing the vessel from being damaged.

  According to the invention of claim 2, in addition to the effect of claim 1, when the seedling reduction detection member detects a decrease in seedlings of the seedling transplanting device, it is notified that the traveling operation lever is operated from “advance” to “neutral” When the member is actuated, the travel control lever is switched from “neutral” to “reverse”, and the rotation of the rear wheel is detected, the notification member is actuated to stop at the field end and start turning When the machine body is moved backward to return to the position, the operator is encouraged to replenish seedlings and is notified of forgetting to replenish, so that the subsequent field work can be facilitated by corresponding measures.

  According to the invention of claim 3, in addition to the effect of claim 1 or claim 2, when the granular material detecting member detects that the granular material stored in the granular material supply device for supplying the granular material has decreased, the vehicle travels. When the operation lever is operated from “forward” to “neutral”, the notification member is activated, the travel operation lever is switched from “neutral” to “reverse”, and the rear wheel rotation detection member rotates the rear wheel. When detected, the notifying member is activated, and when stopping at the end of the field and when the machine is moved backward to return to the turning start position, the operator is encouraged to replenish the granular material, and the forgetting to replenish is informed. Therefore, the subsequent field work can be facilitated by the countermeasure.

  By the invention according to claim 4, in addition to the effect of any one of claims 1 to 3, when the clogging detection member detects that the granular material stored in the granular material supply device is clogged, When the travel operation lever is operated from “forward” to “neutral”, the notification member is activated, the travel operation lever is switched from “neutral” to “reverse”, and the rear wheel rotation detection member is rear wheel. When the rotation is detected, the notification member is activated to stop the clogging of the granular material when the vehicle is stopped at the end of the field and when the machine is moved backward to return to the turning start position. Since the forgetting is notified, the subsequent field work can be facilitated by the countermeasure.

  According to the invention of claim 5, in addition to the effect of any one of claims 1 to 4, when the remaining amount detecting member detects a decrease in the remaining amount of fuel, the traveling operation lever is “forward”. The notification member is activated when operated from “neutral” to “neutral”, and when the travel operation lever is switched from “neutral” to “reverse” and the rear wheel rotation detection member detects the rotation of the rear wheel, , It will prompt the operator to replenish the fuel when stopping at the end of the field and reversing the aircraft to return to the turning start position. The measures can facilitate the subsequent field work.

Side view of seedling transplanter Top view of seedling transplanter Block diagram of the notification system (a) and development of the shift lever guide (b) Flow chart of control processing of notification system Warning system block diagram Flow chart of control processing Side view of seedling transplanter with top cover Plan view of the seedling transplanter in FIG. The principal part front view of the seedling transplanter of FIG. Perspective view of seedling transplanter with visor The perspective view of the seedling transplanting device of another composition

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
First, a seedling transplanter that is an example of a work vehicle to which the present invention is applied will be described.
1 and 2 are a side view and a plan view of a seedling transplanter. In this seedling transplanting machine 1, a seedling transplanting device 4 is mounted on the rear side of the traveling vehicle body 2 via an elevating link mechanism 3 so as to be movable up and down, and a main body portion of the fertilizer application device 5 is provided on the rear upper side of the traveling vehicle body 2. . The seedling transplanting device 4 is a work device that inputs the granular material from the fertilizer application device 5 to the field. In the following, the boarding operator refers to the left and right directions in the forward direction of the seedling transplanter as left and right, respectively, and the forward and backward directions are referred to as forward and backward, respectively.

  The traveling vehicle body 2 is a four-wheel drive vehicle including a pair of left and right front wheels 10 and 10 and a pair of left and right rear wheels 11 and 11 as drive wheels, and a transmission case 12 is disposed at the front of the fuselage. Front wheel final cases 13, 13 are provided on the left and right sides of the case 12, and the left and right front wheels are mounted on the left and right front wheel axles projecting outward from the respective front wheel support portions capable of changing the steering direction of the left and right front wheel final cases 13, 13. 10 and 10 are respectively attached. Further, the front end portion of the main frame 15 is fixed to the rear portion of the transmission case 12, and a rear wheel gear case 18, with a rear wheel rolling shaft provided horizontally in the front and rear sides at the rear left and right center of the main frame 15 as a fulcrum. The rear wheels 11 and 11 are attached to a rear wheel axle that is supported in a freely rolling manner and projects outwardly from the rear wheel gear cases 18 and 18.

  The engine 20 is mounted on the main frame 15, and the rotational power of the engine 20 is transmitted to the transmission case 12 via the belt transmission device 21 and the HST 23. The rotational power transmitted to the mission case 12 is shifted by a transmission in the case 12 and then separated into traveling power and external power to be extracted. A part of the traveling power is transmitted to the front wheel final cases 13 and 13 to drive the front wheels 10 and 10, and the rest is transmitted to the rear wheel gear cases 18 and 18 to drive the rear wheels 11 and 11. Further, the external take-out power is transmitted to a planting clutch case 25 provided at the rear part of the traveling vehicle body 2 and then transmitted to the seedling transplanting device 4 by the planting transmission shaft 26 and also to the fertilizing device 5 by the fertilization transmission mechanism 28. Be transmitted.

  The upper part of the engine 20 is covered with an engine cover 30, and a seat 31 is installed thereon. A front cover 32 incorporating various operation mechanisms is provided in front of the seat 31, and a handle 34 for steering the front wheels 10 and 10 is provided above the front cover 32. The engine cover 30 and the front cover 32 have horizontal floor steps 35 on the left and right sides of the lower end. The floor step 35 is partly grid-shaped (see FIG. 2), and mud or the like on the shoes of the worker walking through the step 35 falls on the field. The rear part on the floor step 35 is a rear step 36 that also serves as a rear wheel fender.

  The elevating link mechanism 3 has a parallel link configuration, and includes one upper link 40 and a pair of left and right lower links 41, 41. These links 40, 41, 41 are pivotally attached to a rear-view portal-shaped link base frame 42 erected on the rear end of the main frame 15, and a vertical link 43 is connected to the tip side thereof. ing. A connecting shaft 44 that is rotatably supported by the seedling transplanting device 4 is inserted into and connected to the lower end portion of the vertical link 43, and the seedling transplanting device 4 is connected to be rotatable about the connecting shaft 44. An elevating hydraulic cylinder 46 is provided between a support member fixed to the main frame 15 and a tip of a swing arm (not shown) integrally formed with the upper link 40, and the cylinder 46 is expanded and contracted by hydraulic pressure. The upper link 40 rotates up and down, and the seedling transplanting device 4 moves up and down while maintaining a substantially constant posture.

  The seedling transplanting device 4 has a six-row planting structure, a transmission case 50 that also serves as a frame, a mat seedling and a left and right reciprocating motion to supply seedlings to the seedling outlet 51a of each row one by one and for one horizontal row. When all the seedlings are supplied to the seedling outlet 51a, ..., the seedling feed belt 51b, ... feeds the seedling downward by the seedling feed belt 51b, ..., and the seedling supplied to the seedling outlet 51a, ... A seedling transplanting device 52 to be attached,..., A pair of left and right drawing markers 184 for drawing the aircraft path in the next stroke to the topsoil surface, and the like. In the lower part of the seedling transplanting device 4, a center float 55 is provided at the center, and side floats 56, 56 are provided on the left and right sides thereof. When the aircraft is advanced with these floats 55, 56, 56 in contact with the mud surface of the field, the floats 55, 56, 56 slide while leveling the mud surface, and the seedling transplanter 52,. Seedlings are planted. Each of the floats 55, 56, and 56 is rotatably mounted so that the front end side moves up and down in accordance with the unevenness of the field topsoil surface, and the vertical movement of the front part of the center float 55 is an angle-of-attack control sensor during planting work. The planting depth of the seedling is always kept constant by switching the hydraulic valve that controls the lifting hydraulic cylinder 46 according to the detection result to raise and lower the seedling transplanting device 4.

  The fertilizer applicator 5 feeds the granular fertilizer stored in the fertilizer hopper 60 by a certain amount by the feeding portions 61,... And applies the fertilizer to the left and right sides of the floats 55, 56, 56 with the fertilizer hoses 62,. Guides (not shown), guided to the fertilizer guide, ... Grooves (not shown) provided on the front side of the fertilizer guide, ... are dropped into the fertilization structure formed near the side of the seedling planting strip. ing. Air generated by the blower 58 driven by the blower electric motor 53 is blown into the fertilizer hose 62 through the air chamber 59 that is long in the left-right direction, and the fertilizer in the fertilizer hose 62 is forced by the wind pressure. It is designed to be transported. The tip end of the fertilizer hose 62 is connected to the seedling transplanting device 4, and granular fertilizer is dropped onto the field by a grooving device 57 described later.

  The seedling transplanting device 4 is attached with a rotor 27 (a combination of the first rotor 27a and the second rotor 27b may be simply referred to as the rotor 27) as an example of a leveling device. Further, the supply stand 51 is configured to slide in the left-right direction using the support roller 65a of the rectangular support frame 65 having a full width in the left-right direction and the up-down direction for supporting the entire seedling transplanting device 4.

  In addition, a pair of spare seedling frames 38, 38 on which replenishment seedlings are placed are placed on the left and right sides of the front portion of the traveling vehicle body 2 so as to project laterally from the aircraft centering on a rotating shaft 49a extending in the vertical direction. It is rotatably provided at a position and a position housed inside. The spare seedling frames 38, 38 are configured so that the first seedling mounting table 38a, the second seedling mounting table 38b, and the third seedling mounting table 38c arranged in three upper and lower stages can be electrically deployed forward and backward.

(Grooving machine)
The seedling transplanting device 4 which is a working device supported so as to be able to move up and down is connected to the fertilizer hose 62 by projecting a grooving device 57 from the bottom surface of each of the floats 55 and 56 provided in the lower part thereof to the field scene, The rear surface side is opened so that granular fertilizer is poured into the groove while forming a groove on the rear end side of the grooving device 57 by fertilization running.

(Groove work)
Next, a notification system for field work by the grooving device 57 will be described.
As shown in the block diagram of FIG. 3A, the notification system for farm work by the grooving device 57 is provided with a notification member 71 such as a buzzer for alerting a boarding worker by the control unit C. It is constituted so that operation control is possible, it is arranged in seedling tank 51 of seedling transplanter 4 and is a notification stop switch 72 for stopping notification operation of notification member 71, and a traveling operation detection member for traveling operation lever 73. A reverse detection switch 73 s, a lift position detection member 3 s by a potentiometer or the like that detects the lift position of the link mechanism 3 that supports the work device 4 so as to be movable up and down, a rear wheel rotation detection member 11 s that detects the rotation of the rear wheel 11, Each signal is input to the control unit C for the hydraulic lift valve 3v that drives the link mechanism 3 up and down by the lift signal.

  The travel operation lever 73 is an HST lever that continuously changes the vehicle speed operation range of forward F and reverse B across the neutral N, adjusts the support height of the link mechanism 3 along with the selection of the vehicle speed, and also detects the reverse travel switch 73s. Is a travel operation detecting member configured by a switch or the like for detecting the reverse B vehicle speed operation position of the travel operation lever 73 as shown in the development of the lever guide in FIG.

  As shown in the flowchart of FIG. 4, the control process by the controller C is set to the reverse position by the first step (hereinafter abbreviated as “S1”) of the reverse position determination process by the traveling operation detecting member 73s. Corresponding, the hydraulic elevating valve 3v corresponds to rising (S2), the elevating position detecting member 3s corresponds to determination (S3) below a predetermined value (for example, 10 cm), and the rear wheel rotation sensor 11s is determined to be “rotation” ( When it corresponds to S4), a warning buzzer is operated by the notification member 71 (S5), and the buzzer is stopped by operating the buzzer stop switch 72 (S6a, S6b).

  In this way, during back turning at the end of the field, when the link mechanism 3 is not raised to a predetermined height, the aircraft is operated backward, and when the aircraft starts moving backward, the operation device 4 is informed until it is stopped with the switch 72 arranged. Since the member operates to warn the operator that the link mechanism 3 has been forgotten to be raised, it is possible to prevent the groover provided at the lower part of the working device from coming back in contact with the farm scene or approaching the farm scene. It is prevented that the grooving device is damaged by contact with the field scene, and the durability of the grooving device is improved. In addition, it is prevented that the granular material supplied from the granular material supply device does not come out of the grooving device due to the mud adhered to the grooving device, and the granular material is not supplied to the field, so the supply of the granular material is interrupted. Therefore, it is not necessary to manually supply the granular material, and the labor of the operator is reduced.

  In addition, when the link mechanism 3 does not rise above a predetermined height during reverse travel, the notification member 71 is configured to operate, so that the grooving device 57 provided at the lower portion of the work device 4 is in contact with the field scene or the field scene. Therefore, it is possible to prevent the groover 57 from being damaged due to contact with a field scene, and the durability of the groover is improved.

  And it prevents mud from adhering to the grooving device 57, and the granular material such as fertilizer supplied from the fertilizer application device 5, which is a granular material supply device, does not come out of the grooving device 57 and the granular material is not supplied to the field. Therefore, the supply of the granular material is not interrupted, it is not necessary to supply the granular material manually, and the labor of the operator is reduced.

  Furthermore, even if the travel operation lever 73 is erroneously operated during reverse travel and the link mechanism 3 is lowered, the notification member is activated to notify the operator of the lowering of the link mechanism 3 when the link mechanism 3 falls below a predetermined height. Therefore, the operator can prevent the grooving device 57 from approaching the field scene by quickly operating the traveling operation lever 73 to raise the link mechanism 3.

(Seedling supplement warning)
Next, a warning system for various countermeasures including seedling replacement will be described.
As shown in the block diagram of FIG. 5, the warning system for various measures includes a travel operation detecting member 73 s by a main transmission potentiometer, a seedling reduction switch 51 s of the seedling tank 51, a fertilizer runout sensor 5 s of the fertilizer application device 5, and Input signals from the fertilizer clogging sensor 5t and the remaining fuel amount sensor 20s are input to the control unit C, and the control unit C is configured to be able to control the alarm buzzer 71 as a notification member.

  The travel operation detection member 73s detects the travel operation lever 73 with a potentiometer or the like over the vehicle speed operation positions of “forward”, “neutral”, and “reverse” of the main shift. The seedling reduction switch 51s detects that the supplied seedlings on the seedling tank 51 have been reduced to a predetermined amount. The fertilizer running-out sensor 5s is constituted by a granular material detection member, and detects a decrease in fertilizer of the fertilizer application device 5 that is a granular material supply device. The fertilizer clogging sensor 5t is configured by a clogging detection member for the granular material, and detects clogging of the fertilizer sent from the fertilizer application device 5 which is a granular material supply device. The fuel remaining amount sensor 20s is configured by a fuel tank remaining amount detecting member, and detects a decrease in residual fuel.

  As shown in the flowchart of FIG. 6, the control process by the control unit C corresponds to any of the seedling reduction switch 51 s, the fertilizer shortage sensor 5 s, the fertilizer clogging sensor 5 t, and the reduction determination (S11) for the remaining fuel amount sensor 20 s. In this case, if the traveling operation detecting member 73s is determined to be “neutral” following “forward” (S12), the alarm buzzer 71 is activated within that range (S13a to S13c).

  That is, at the time of seedling reduction, in the state where the center mascot blinks due to the seedling reduction detection by the seedling reduction switch 51s, the seedling reduction detection is performed from the time when the forward traveling is stopped when the vehicle turns backward at the end of the forward traveling. Since the alarm buzzer 71 operates in the range of, forgetting to replenish seedlings at the time of dredging can be prevented.

  In this way, when the working device is the seedling transplanting device 4, the seedling reduction detection member 51s detects the reduction of the seedling, and when the traveling operation lever 73 is operated from “advance” to “neutral”, the notification member 71 Since it is configured so that the operator can be urged to replenish seedlings when stopping at the end of the field, it is prevented that the worker forgets to replenish the seedlings and resumes the work. This eliminates the need to return to replenishing seedlings, improving work efficiency.

  Further, when the seedling reduction detection member 51s is in the detection state, the notification member 71 is detected when the traveling operation lever 73 is switched from “neutral” to “reverse” and the rear wheel rotation detection member 11s detects the rotation of the rear wheel 11. Since the operator can be notified of forgetting to replenish the seedling when the machine is moved backward to return to the turning start position, the machine can be immediately returned to the end of the field to replenish the seedling. Work efficiency is improved.

(Fertilizer supplement warning)
Similarly, in the case of running out of fertilizer, it is a decrease in fertilizer of the fertilizer application device 5 in accordance with the detection of the decrease in fertilizer by the fertilizer running-out sensor 5s, and the travel operation detection member 73s causes the travel operation lever 73 to continue to “forward”. Whether the vehicle is neutral, or when the travel operation lever 73 is "reversed" by the travel operation detection member 73s and the rear wheel 11 is rotated by the rear wheel rotation detection member 11s, the notification member 71 is within that range. By configuring the control to operate, it is possible to prompt the worker to replenish the fertilizer when stopping at the end of the field, preventing the worker from forgetting to replenish the fertilizer and restarting the work, It is no longer necessary to return to the replenishment of the granular material, and when the aircraft is moved backward to return to the turning start position, the operator can be informed that the fertilizer has been forgotten to be replenished. Replenishing fertilizer because performed Te, either it is possible to improve the work efficiency.

(Warning about fertilizer clogging)
Similarly, when the fertilizer is clogged, the fertilizer clogging of the fertilizer application device 5 is detected in accordance with the detection of the fertilizer clogging by the clogging detection member 5t, and the traveling operation detection member 73s causes the traveling operation lever 73 to continue to “forward”. Whether the vehicle is neutral, or when the travel operation lever 73 is "reversed" by the travel operation detection member 73s and the rear wheel 11 is rotated by the rear wheel rotation detection member 11s, the notification member 71 is within that range. By adopting a configuration to operate, when stopping at the end of the field, the operator can be encouraged to eliminate clogging of granular materials at the shore with a water channel that can be inspected and cleaned. It is possible to prevent the clogging of the body from being forgotten and to resume the work, to prevent the occurrence of a section where the granular material is not supplied, and it is not necessary for the operator to manually supply the granular material, and the turning start position Since it is possible to inform the operator that the clogging of the granular material has not been resolved when the aircraft is moved backward to return to, the clogging of the granular material can be solved immediately by returning the aircraft to the field end, Occurrence of a section in which no granular material is supplied is prevented, and it is not necessary for the operator to manually supply fertilizer, and in any case, the labor of the operator is reduced.

(Fuel replenishment warning)
Similarly, when the fuel is decreased, the fuel is decreased due to the detection of the fuel decrease by the clogging detection member 5t, and the travel operation lever 73 is “neutral” following “forward” by the travel operation detection member 73s. And the configuration in which the notification member 71 is operated within the range regardless of whether the travel operation lever 73 is "reversed" by the travel operation detection member 73s and the rear wheel 11 is rotated by the rear wheel rotation detection member 11s. As a result, it is possible to prompt the operator to replenish the fuel when stopping at the end of the field, preventing the worker from forgetting to replenish the fuel and restarting the work, and stopping the aircraft in the middle of the field. It is not necessary to move the machine with the driving force stopped to the end of the field, and when the remaining amount detection member is in the detection state, the travel control lever switches from “neutral” to “reverse”. In addition, when the rear wheel rotation detection member detects the rotation of the rear wheel, the notification member is activated, so that the operator can be informed that fuel has been forgotten to be refilled when the aircraft is moved backward to return to the turning start position. Since the machine body can be immediately returned to the end of the field and fuel can be replenished, work efficiency is improved in any case.
Furthermore, there is no need to bring in a plastic tank or the like containing fuel into the field to perform fuel supply work, and it is possible to prevent the fuel from falling into the field and contaminating water and soil.

  For the seedling transplanter with the above-described control configuration, in the configuration in which a decrease in seedling, fertilizer, seed is detected and an alarm is issued on the spot, the state where seedling, fertilizer, seed, fuel, etc. are reduced Even if you reach the field edge in a clogged state, you may forget what you should take due to the swiveling of the aircraft and the complicated operations associated with it. This effectively solves the problem that seedlings, fertilizers, seeds, fuel, etc. run out after leaving the ground and must be returned from the middle of the field to the end of the field, resulting in longer travel distances and hindering subsequent work processes. can do.

  It is clear that the configuration described above can be similarly applied to a seeder common to the granular material supply operation. For example, after the notification stop switch 72 is arranged at the rear part of the direct seeder, the fertilizer running-out sensor Since it can be similarly configured by a seed clogging detection member that detects clogging of seeds as well as fertilizer clogging, it can be similarly configured by a seed clogging detection member that detects the crushing of granular material as in 5s, and its operation effect is also the same. Detailed description thereof is omitted.

(Top cover)
Next, a seedling transplanter with a top cover will be described.
As shown in a side view, a plan view, and a front view of the main part of FIGS. The top cover 81 supports a substantially box-shaped frame composed of a soft and transparent resin sheet centered on the cockpit 31 with 82, and has a vertical doorway 83 on both sides of the cockpit 31 that can be opened and closed by a fastener or a stopper button. Form.

  The top cover 81 made of a soft and transparent resin sheet that hangs forward, backward, left and right around the cockpit 31 and a control device such as a meter or an operation tool can be protected from the sun and rain while ensuring the surrounding field of view. The top cover 81 stabilizes the worker's condition and ensures work efficiency. In addition, the entrance / exit 83 of the top cover 81 can be easily opened and closed as necessary, and its flexibility allows safety to be ensured even when the operation member or the operator's body comes in contact with the lever. By sufficiently taking the skirt of the top cover 81 that hangs down on the surface until it hangs down on the floor mat of the floor step 35, strong push-pull can be handled.

  In addition, a top cover 81 is configured in a range extending from the third seedling mounting base 38 c at the rear end position of the preliminary seedling frame 38 when deployed in the front-rear direction and the upper end of the supply base 51 of the seedling transplanting device 4, to match the supply base 51. By forming the incision, it is possible to avoid wetness when the seedling is replenished.

(visor)
Next, a visor for a seedling transplanter will be described.
As shown in the perspective view of FIG. 10, the visor 91 for the seedling transplanter is configured by integrally forming a front portion 92a made of a transparent plate and a roof portion 92 on the second half side with polycarbonate resin or the like, and the front end of the front portion 92a is By fixing to the airframe and supporting the rear end of the roof portion 92b with a support post 93, a lightweight and solid sun visor / rain visor is constructed, and a grip handle 94 for getting on and off is attached. The support column 93 is formed by bending the middle step portion 93b in a crank shape, and is arranged in the vicinity of the supply base 51 of the seedling transplanting device 4 so as to be pivotable about its axis.
The seedling transplanter shown in FIGS. 10 and 11 removes the left and right spare seedling frames 38 and 38 and the fertilizer application device 5 in order to clearly show the visor 91 that is the main part. Can be attached to the seedling transplanter shown in FIGS.

  When seedlings are replenished to the supply platform 51 of the seedling transplanting device 4, a large space extending from the side of the cockpit 31 to the rear can be secured by rotating the middle step portion 93b of the support column 93 to an appropriate position. In this way, the lightweight visor 91 securely supported by the support column 93 ensures the front field of view and secures from the both sides of the cockpit 31 to the rear seedling transplanting device 4 within the cover range of the roof portion 92b. This space allows the seedling replenishment work to proceed without hindrance.

  Therefore, the conventional visor is in a seedling transplanter that must operate under various weather conditions, and a continuous space from both sides of the cockpit 31 to the rear seedling transplanting device 4 for handling seedlings. In order to ensure this, the visor support configuration solves the problem of the conventional configuration in which the tip of the visor has to be fixed in a cantilevered manner, and the increased weight and large cost burden are required to ensure its rigidity. Therefore, the working environment of the seedling transplanter can be improved.

  Further, as shown in the perspective view of the seedling transplanting device 4 having another configuration shown in FIG. 11, an indicator portion 95 that functions as a marker during straight running is integrally formed on the transparent front portion 92a of the visor 91 by printing or sticking a seal. By providing, a simple and maintenance-free marker can be constructed at low cost without requiring a rod-shaped marker standing at the front end position of the machine body as in the prior art.

1 Work vehicle (seedling transplanter)
2 traveling vehicle body 3 elevating link mechanism 3s elevating position detecting member 4 working device (seedling transplanting device)
5s Fertilizer reduction sensor 5t Fertilizer clogging sensor 5 Granules supply device (fertilizer application device)
DESCRIPTION OF SYMBOLS 10 Front wheel 11 Rear wheel 11s Rear wheel rotation detection member 20s Fuel remaining amount sensor 31 Pilot seat 46 Lifting hydraulic cylinder 51 Supply stand (seed tank)
51s Seedling reduction switch (Seedling reduction detection member)
52 Seedling transplanting device 55 Center float 56 Side float 57 Grower 60 Fertilizer hopper 71 Notification member (alarm buzzer)
72 Notification Stop Switch 73 Traveling Operation Lever 73s Traveling Operation Detection Member C Control Unit

Claims (5)

A traveling vehicle body (2) having a front wheel and a rear wheel traveling on a farm field, a link mechanism (3) for supporting a work device (4) for working on a farm field at a rear portion of the traveling vehicle body (2), and the above-mentioned The granular material supply device (5) for supplying the granular material to the working device (4), and the granular material supply device (5) that protrudes from the lower portion of the working device (4) to form a groove in the field. Detecting the rotation of the rear wheel, the groove forming device (57) for throwing the granular material into the groove, the traveling operation lever (73) for selecting the vehicle speed for forward and backward movement and the support height adjustment for the link mechanism (3). In the work vehicle provided with the rear wheel rotation detection member (11a),
A lift position detection member (3s) for detecting the lift position of the link mechanism (3), a travel operation detection member (73s) for detecting an operation position of the travel operation lever (73), and a notification member ( 71) and a notification stop switch (72) disposed on the work device (4) for stopping the notification operation of the notification member (71), and the link mechanism (3) by the lift position detection member (3s). ) Is equal to or less than a predetermined height, the traveling operation detection member (73s) satisfies the three conditions of the traveling operation lever (73) for the reverse vehicle speed position, and the rear wheel rotation detection member (11a) for the rear wheel (11) for rotation. The work vehicle is configured to operate the notification member (71) until the operation of the notification stop switch (72).   The working device (4) is a seedling transplanting device for planting loaded seedlings in a field, and the seedling transplanting device is provided with a seedling reduction detecting member (51s) for detecting a decrease in the loaded seedlings, and loaded by the seedling reduction detecting member (51s). When a decrease in seedlings is detected, when the travel operation lever (73) is in the neutral operation position following the forward operation position by the travel operation detection member (73s), and similarly when a decrease in loaded seedlings is detected. In both cases, the travel operation lever (73) is in the reverse operation position by the travel operation detection member (73s) and the rear wheel (11) is in rotation by the rear wheel rotation detection member (11a). The work vehicle according to claim 1, wherein the notification member is activated.   The granular material supply device (5) is provided with a granular material detection member (5s) for detecting a decrease in granular material, and when the decrease in granular material is detected by the granular material detection member (5s), a traveling operation detection member is provided. (73s), when the travel operation lever (73) is in the neutral operation position following the forward operation position, and similarly when the decrease in granular material is detected, the travel operation lever (73s) is detected by the travel operation detection member (73s). ) Is a reverse operation position and the rear wheel (11) is rotated by the rear wheel rotation detection member (11a), the notification member (71) is operated within that range. The work vehicle according to claim 1, wherein the work vehicle is a vehicle.   The granular material supply device (5) for supplying the granular material is provided with a clogging detection member (5t) for detecting the clogging of the granular material, and the traveling operation is performed when the clogging of the granular material is detected by the clogging detection member (5t). When the travel operation lever (73) is in the neutral operation position following the forward operation position by the detection member (73s), and when the clogging of the granular material is detected in the same manner, the travel operation lever (73s) is used by the travel operation detection member (73s). (73) is the reverse operation position, and the rear member (11) is rotated by the rear wheel rotation detection member (11a), and the notification member (71) is operated within that range. The work vehicle according to claim 1, wherein the work vehicle is a vehicle.   The traveling vehicle body (2) is provided with a fuel tank and a remaining amount detection member (20s) for detecting a decrease in the remaining amount thereof, and when a decrease in fuel is detected by the remaining amount detection member (20s), a traveling operation is detected. When the travel operation lever (73) is in the neutral operation position following the forward operation position by the member (73s), and when the decrease in fuel is similarly detected, the travel operation detection member (73s) detects the travel operation lever (73 ) Is a reverse operation position and the rear wheel (11) is rotated by the rear wheel rotation detection member (11a), the notification member (71) is operated within that range. The work vehicle according to any one of claims 1 to 4, characterized in that:

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