JP2019062752A - Work vehicle - Google Patents

Abstract

To provide a work vehicle capable of calling a worker's attention before workability is reduced.SOLUTION: A sulky rice transplanter 1 comprises a traveling vehicle body 2 and a planting device 100, connected to the traveling vehicle body, for performing predetermined planting work on a field. The sulky rice transplanter 1 comprises: a front side step 13A and a rear side step 14A provided adjacently to a cockpit 10 of the sulky rice transplanter 1 where a rolled seedling 19 can be loaded on the steps; a first rolled seedling detection sensor 60A to a fourth rolled seedling detection sensor 60D attached to the front side step 13A and the rear side step 14A for detecting the presence of a rolled seedling 19; and a control unit 200 that on the basis of detection results by the first rolled seedling detection sensor 60A to the fourth rolled seedling detection sensor 60D and state information on the sulky rice transplanter 1 or state information on the field, determines whether or not to cause an alarm sound generator 260 to output alarm sound for calling a worker's attention.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a work vehicle that performs work in a field or the like.

  On a work vehicle such as a seedling transplanting machine that carries out operations such as planting of seedlings in a field, a seedling platform on which spare seedlings are placed is mounted (see, for example, Patent Document 1).

  On the other hand, depending on the area, mat seedlings which are not grown in a seedling tray of a prescribed size may be used because the method of growing seedlings is different. In the case of using mat seedlings having a size longer than the longitudinal dimension of such a seedling tray of a prescribed size, the planting work is carried out by rolling it into a roll and placing it on a floor step of the machine as spare seedlings.

JP, 2016-67303, A

  However, when a large amount of rolled-up spare seedlings are loaded on the floor step, the weight balance of the vehicle may be deteriorated, or the field may be difficult to travel due to the sinking of the vehicle in the wet field.

  An object of the present invention is to provide a work vehicle capable of alerting a worker before the workability is lowered, in consideration of such problems of the conventional work vehicle described above.

In order to solve the above-mentioned subject, the present invention according to claim 1 is
A traveling car body (2),
A work vehicle (100) connected to the traveling vehicle body (2) for performing a predetermined work on a field, comprising:
Floor steps (13A, 14A) arranged adjacent to a pilot seat (10) of the work vehicle, on which work materials (19) used for the predetermined work can be placed;
A work material detection unit (60A, 60B, 60C, 60D) attached to the floor step (13A, 14A) to detect the presence status of the work material;
Based on the detection result by the work material detection unit (60A, 60B, 60C, 60D) and the status information of the work vehicle or the status information of the field, a warning signal (260) A control unit (200) that determines whether to output
It is a working vehicle characterized by having.

The present invention according to claim 2 is
The state information of the work vehicle or the state information of the field is information on the sinking of the work vehicle in the field,
In the control unit (200), the detection result by the work material detection unit (60A, 60B, 60C, 60D) indicates the presence state of the work material, and the state information of the work vehicle or the field The work vehicle according to claim 1, wherein if the state information is information indicating the possibility of the sinking, it is determined that there is a risk of the sinking and the alarm signal is output. is there.

The present invention according to claim 3 is
A positioning device (210) for acquiring position information of the traveling vehicle body (2);
A memory unit (201) for storing in advance position information of a place having a history of sinking in the field or position information of a place having a possibility of sinking in the field as the state information of the field;
The control unit (200) stores the position information acquired by the positioning device (210) in the memory unit (201) when the detection result indicates the presence status of the working material. The work vehicle according to claim 2, wherein the work vehicle is determined to have the danger of sinking by entering a predetermined range of position information of the portion, and the alarm signal is output.

  According to the first aspect of the present invention, the operator can be alerted before the workability decreases.

  According to the second aspect of the present invention, in addition to the effects of the first aspect of the present invention, the operator can be alerted before the work vehicle sinks.

  According to the third aspect of the present invention, in addition to the effects of the second aspect of the present invention, the operator can be more surely alerted before the occurrence of the sinking of the work vehicle.

A schematic right side view of a riding rice transplanter according to an embodiment of a work vehicle of the present invention A schematic plan view of the riding rice transplanter according to the present embodiment Control block diagram of the riding rice transplanter according to the present embodiment A schematic partial enlarged view of the right side surface of the riding rice transplanter according to the present embodiment A partially enlarged schematic plan view including the front side step on the right side, the rear side step on the right side, and the vicinity thereof in the riding rice planter of the present embodiment Partially enlarged schematic side view including the front side step on the right side, the rear side step on the right side, and the vicinity thereof in the riding rice planter of the present embodiment In the riding rice planter according to the present embodiment, a schematic partial enlarged plan view when looking downward in a state where the lower portion of the seating portion is cut along a horizontal surface It is a partial expansion perspective view for demonstrating the empty box storage case in the riding rice planter of this embodiment, and the figure which shows the state which the empty box storage case takes the accommodation attitude

  An 8-row planting rice transplanter according to an embodiment of the work vehicle of the present invention will be described below with reference to the drawings.

  FIG. 1 is a side view of a riding rice transplanter according to the present embodiment.

  Moreover, FIG. 2 is a top view of the riding rice transplanter of this Embodiment shown in FIG.

  FIG. 3 is a control block diagram of the riding rice transplanter of the present embodiment.

  The riding rice planter 1 of the present embodiment is configured in consideration of the case where mat seedlings having a size longer than the dimension in the longitudinal direction of the seedling tray of a prescribed size are used.

  As shown in FIG. 1, in the riding rice planter 1 of this embodiment, the planting device 100 is mounted on the rear side of the traveling vehicle body 2 via the elevator link device 3 so as to be able to move up and down. A pair of left and right hoppers 4L, 4R of the apparatus is provided.

  Moreover, since the riding rice transplanter 1 of the present embodiment is for eight-row planting, as shown in FIG. 2, the planting device 100 has eight seedling tanks 110 and eight planting claws 120. ing. The above-described long size mat seedlings are supplied to each of the seedling tanks 110, and the seedlings of the mat seedlings supplied to the seedling tanks 110 are planted in the field by each of the eight planting claws 120.

  The riding rice planter 1 is a four-wheel drive working vehicle provided with a pair of left and right front wheels 5L, 5R and a pair of left and right rear wheels 6L, 6R on the traveling vehicle body 2.

  Further, the engine 7 is mounted on the main frame 8, and the rotational power of the engine 7 is an auxiliary transmission mechanism or the like in a transmission case (not shown) via the HST 16 (hydrostatic stepless transmission) or the like. Transmitted to The rotational power that has been shifted in the transmission case is configured to be separated and output as traveling power used for a traveling system or the like and externally extracted power used for the planting device 100 or the like.

  Further, the upper part of the engine 7 is covered with an engine cover 9, and a pilot seat 10 is installed on the engine cover 9. A steering handle 11 for steering the front wheels 5 L, 5 R is provided in front of the pilot seat 10, and the front cover 12 is covered with a front cover 12.

  The front floor step 13 is generally forward of the front half of the engine cover 9 in plan view, and the rear floor step 14 is generally rearward of the rear half of the engine cover 9 in plan view. The rear floor step 14 is located one step higher than the front floor step 13. Further, the front side steps 13A on the left and right sides of the front floor step 13 are assembled in a lattice, and are formed of a floor surface provided with a large number of substantially rectangular through holes 13α. The rear side steps 14A on the left and right sides of the rear floor step 14 are also assembled in a grid like the front side steps 13A, and are formed of floor members provided with a large number of substantially rectangular through holes 14α. .

  In the present embodiment, in the front side step 13A and the rear side step 14A, the rolled seedling 19 (see FIG. 4) in which the mat seedling having a size longer than the dimension in the longitudinal direction of the seedling tray of prescribed size is rolled It is configured to be mountable. This will be further described later.

  In addition, on the left and right sides of the front floor step 13 on both left and right sides of the front cover 12, there is disposed a seedling support frame 15 for replenishing a large number of rolled seedlings 19 as spare seedlings. During planting work, the operator takes out the rolled seedling 19 placed in advance on the frame 15 and the rolled seedling 19 placed on the front side step 13A and the rear side step 14A, and is connected to the rear It is the structure which can replenish the seedling tank 110 of the planting apparatus 100 one by one.

  The seedling loading frame 15 for replenishment is mounted and dismounted by a seedling loading frame supporting frame 15B vertically erected upward from the tip of the seedling loading frame base 15A which protrudes in the left and right direction from the lower portions on the left and right sides of the front floor step 13. It is supported possible.

  Further, behind the pilot seat 10, there is provided a seat portion 20 on which an assistant who performs an assisting operation such as supplying the seedling tank 110 with mat seedlings during planting operation can rest. This will be further described later.

  In addition, safety handrails 30 are provided at the rear end portion and the left and right end portions of the rear floor step 14 so that the assistant can work safely in the rear floor step 14.

  In addition, in the safety handrail 30, an empty box storage case 40 for storing a flexible resin-made seedling box, for example, is rotatably attached to the portions disposed at the left and right ends of the rear floor step 14. It is done. This will be further described later.

  Further, below the left and right ends of the front side step 13A on both the left and right sides of the front floor step 13, there is provided an auxiliary step 17 for an operator or an assistant to go up and down.

  Further, in the present embodiment, a receiving antenna for receiving radio waves from the satellite at the left and right center position of the top surface of the portal antenna frame 18a projected from the lower portions on the left and right sides of the front floor step 13 in front view 18 is attached.

  In addition, the riding rice transplanter 1 of the present embodiment is provided with a positioning device 210 that acquires position information of the riding rice transplanter 1 based on the GNSS (Global Navigation Satellite System). The position information of the riding rice transplanter 1 acquired by the positioning device 210 is transmitted to the control unit 200 based on the radio waves from the satellites received by the receiving antenna 18 (see FIG. 3). This will be further described later.

  Next, a rolled seedling drop prevention net 50 provided on the pair of left and right front side steps 13A, 13A of the front floor step 13 will be described using FIGS. 1, 2 and 4. FIG.

  FIG. 4 is a schematic partial enlarged view of the right side surface of the riding rice transplanter 1 of the present embodiment.

  A pair of left and right front net fixing plates 51, 51 having a plurality of holes for attaching the front end of the front seedling drop prevention net 50 are provided on the back of the pair of left and right seedling support frames 15B, 15B described above. It is fixed.

  A pair of left and right connecting plates 52, 52 connecting the rear ends of the pair of left and right front side steps 13A, 13A and the front ends of the pair of left and right rear side steps 14A, 14A are of both side steps 13A, 14A. It is provided near the outer end. A plurality of holes for attaching the rear end portion of the rear seedling drop prevention net 50 are formed in the pair of left and right connection plates 52, 52, and also serves as a rear net fixing plate. .

  Furthermore, at the outermost end of the approximate center position of the longitudinal width of the pair of left and right front side steps 13A, 13A, the pipe member is bent in a substantially M shape in a side view at a position corresponding to the upper side of the auxiliary step 17. The net fixing member 53 is detachably fixed in a standing manner. Among the pipe members of the net fixing member 53, the pipe center 53a of the pipe member on the front side is the front side in a side view from the front end of the longitudinal width W of the auxiliary step 17 and the pipe member of the net fixing member 53, The pipe center 53 b of the side pipe member is located on the rear side in a side view from the rear end portion of the longitudinal width W of the auxiliary step 17.

  The pair of left and right net fixing members 53, 53 is formed so that the front seedling drop prevention net 50 can be attached to the front side pipe member, and the pair of left and right net fixing members 53, 53 is A rear seedling drop prevention net 50 is formed attachable to the side pipe member.

  The left and right pair of front net fixing plates 51, 51 have a plan view, with reference to the position of the pipe member on the front side of the net fixing member 53, for attaching the rear end of the front seedling drop prevention net 50. It is located inside the aircraft (see Figure 2).

  With the above configuration, in the riding rice planter 1 of the present embodiment, the front side rolled seedling is located between the pair of left and right front net fixing plates 51, 51 and the front pipe member of the pair of left and right net fixing members 53, 53. The drop prevention net 50 is detachably mounted, and a pair of left and right connection plates 52, 52 (also serving as a rear side net fixing plate) and a pipe member on the rear side of the left and right pair of net fixing members 53, 53 And the rear side seedling drop prevention net 50 can be detachably attached between the front and rear sides through the net fixing member 53 so as to substantially follow the outer end of the front side step 13A on the left and right sides. A seedling drop prevention net 50 can be provided upright on each side.

  Thus, with a simple configuration, a large number of rolled seedlings 19 can be placed by the pair of left and right front side steps 13A of the front floor step 13, and the rolled seedlings 19 as spare seedlings placed on them (see FIG. 4) Can be prevented from falling due to positional deviation to the outside of the vehicle due to vibration.

  In addition, by fixing the front net fixing plate 51 to the rear surface of the pair of left and right seedling placing frame support frames 15B and 15B as described above, it can also serve as a reinforcing member of the seedling placing frame support frame 15B.

  Further, by forming the net fixing member 53 in a substantially M shape in side view as described above, the height of the central portion in the side view is lowered, and the pipe members at both ends of the substantially M shape are By being disposed at a position straddling the longitudinal width W of the auxiliary step 17, when going up and down from the auxiliary step 17, it is difficult for the foot to be caught by the net fixing member 53.

  When the front end of the pair of left and right front side steps 13A is shaped so as not to extend to the area 13B (see FIG. 2) on the outside and front of the seedling mount frame base 15A in plan view, The front end portions of the pair of left and right front side steps 13A can be prevented from coming into contact with obstacles such as scissors.

  Further, as described above, the pair of left and right front side net fixing plates 51, 51 is for comparing the position of the pipe member on the front side of the net fixing member 53 for attaching the rear end portion of the seedling drop prevention net 50 on the front side. By being located inside the machine in a plan view, it is possible to prevent the tip of the seedling 19 placed on the front end side of the pair of left and right front side steps 13A from protruding outside the front side step 13A Therefore, when the vehicle is made to turn and travel, it is possible to prevent the rolled seedlings 19 placed at the front end portions of the pair of left and right front side steps 13A from coming into contact with obstacles such as brows.

  Next, in the riding rice planter 1 according to the present embodiment, by emitting a warning sound, it is prevented that the body can not move due to the sinking of the airframe in the field (hereinafter referred to simply as the sinking prevention or the sinking prevention The control mechanism which can prevent or prevent the generation of spare seedlings will be described with reference to FIGS. 3, 5 and 6. FIG.

  First, the first rolled seedling detection sensor 60A to the fourth rolled seedling detection sensor 60D for detecting the presence or absence of the rolled seedling 19 placed as a reserve seedling will be described using FIGS. 5 and 6.

  FIG. 5 is a partially enlarged schematic plan view including the front side step 13A on the right side, the rear side step 14A on the right side, and the vicinity thereof in the riding rice planter 1 of the present embodiment.

  6 is a partially enlarged schematic side view including the front side step 13A on the right side, the rear side step 14A on the right side, and the vicinity thereof in the riding rice planter 1 of the present embodiment.

  In the riding rice planter 1 of the present embodiment, the first rolled seedling detection sensor 60A is a front pipe portion 32F of the second handrail portion 32 on the right side of the safety handrail 30 at the outboard side of the rear side step 14A on the right side. (See FIGS. 5, 6 and 8) and fixed so as to be accommodated in the inner through hole 14α (see FIG. 5), and the second seedling detection sensor 60B is a front end portion of the front side step 13A on the right side, It is fixed so that it may be settled in penetration hole 13 alpha (refer to Drawing 5) inside a roll seedling fall prevention net 50 on the front side near the machine body outside on the front side rather than a pipe member on the front side of net fixing member 53.

  Further, similarly to this, the third rolled seedling detection sensor 60C (see FIG. 2) is a front pipe portion 32F in the second handrail portion 32 on the left side of the safety handrail 30 in the outboard side of the rear side step 14A on the left side. The fourth seedling detection sensor 60D (see FIG. 2) is fixed so as to fit in the inner through hole 14α (see FIG. 5) (see FIGS. 6 and 8), and the front end of the left front side step 13A. The portion is fixed so as to be accommodated in the through hole 13α (see FIG. 5) inside the inner-rolling seedling prevention net 50 on the front side closer to the machine body outer side on the front side than the pipe member on the front side of the net fixing member 53.

  In this manner, the first rolled seedling detection sensor 60A and the third rolled seedling detection sensor 60C can be used as the through holes 14α inside the front side pipe portion 32F of the second handrail portion 32 on the right side of the safety handrail 30 (see FIG. 5). And the outer end portion of the rolled seedling 19 is attached to the left and right front side pipe portions 32F, 32F by attaching the through hole 14α inside the front side pipe portion 32F of the second handrail portion 32 on the left side of the safety handrail 30). Since it is difficult to fall into contact with the lower part of the tree, it is possible to reliably detect the presence or absence of the seedling 19 and to be less likely to interfere with walking of an assistant or the like.

  In addition, as described above, the second rolled seedling detection sensor 60B and the fourth rolled seedling detection sensor 60D are attached to the front end of the pair of left and right front side steps 13A and 13B, so that the auxiliary step 17 is formed. It is hard to get in the way when going up and down. Further, since the second rolled seedling detection sensor 60B and the fourth rolled seedling detection sensor 60D can be disposed on the front side, it is more accurately detected that there is only a small amount of remaining rolled seedling 19 placed as a spare seedling. I can do it. This point will be further described later.

  The configuration of the first rolled seedling detection sensor 60A to the fourth rolled seedling detection sensor 60D and the attachment state to the through holes 13α and 14α are the same as each other, so here the first rolled seedling detection sensor 60A will be described. The description of the 2-rolled seedling detection sensor 60B to the fourth-rolled seedling detection sensor 60D is omitted.

  As shown in FIGS. 5 and 6, the first rolled seedling detection sensor 60A has a switch base 61 with a built-in limit switch (not shown) and one end rotatably supported by the switch base 61. The actuator unit 62 is provided.

  The upper edge portion of the actuator portion 62 has a substantially wedge shape, and is exposed upward from the upper surface of the switch base 61.

  As a result, when the actuator portion 62 is pressed downward, the actuator portion 62 is pivoted downward until the upper portion is hidden inside the switch base 61, and is incorporated in the switch base 61, until it is in the OFF state The limit switch is turned on.

  The switch base 61 is fixed in the through hole 14α so that the upper end edge thereof is at the same height as the upper end edge of the through hole 14α, that is, the upper surface portion of the grid, as shown in FIG. Therefore, when the actuator portion 62 is pressed downward, the upper portion of the actuator portion 62 has the same height as the top surface portion of the lattice.

  Thus, the four sides of the switch base 61 are covered with grid-like rib wall surfaces, and the upper end edge of the switch base 61 has the same height as the top face of the grid-like rib, so that the inside of the through hole 14α is formed. When the actuator portion 62 is also fixed to the lower side, it is completely inserted into the inside of the switch base 61. Therefore, even if the first seedling detection sensor 60A is accidentally stepped on, the first Since no load is applied to the seedling detection sensor 60A, breakage can be prevented.

  In addition, since the upper edge of the actuator portion 62 has a substantially wedge-like inclination, and the inclination direction is attached generally along the front-rear direction, the foot may be hooked when walking on the rear side step 14A. There is not.

  Since the first rolled seedling detection sensor 60A to the fourth rolled seedling detection sensor 60D and the control unit 200 are electrically connected, the control unit 200 includes the first rolled seedling detection sensor 60A to the fourth rolled seedling detection sensor 60D. It is the composition which can detect the ON / OFF state of the limit switch built in each (refer to FIG. 3).

  Next, various sensors required for the control mechanism for implementing the sunken prevention in the field in the riding rice planter 1 of the present embodiment will be described with reference to FIG.

  That is, the rear wheel rotation detection sensor 230 for detecting the vehicle speed of the riding rice planter 1 by detecting the number of rotations of the rear wheel is provided in the riding rice planter 1 of the present embodiment. Connected.

  In addition, the riding rice planter 1 of the present embodiment is provided with the HST lever position detection sensor 240 for detecting the operation position of the HST lever (not shown) for switching the HST 16, and the control unit 200 is electrically Connected.

  Further, the riding rice planter 1 of the present embodiment is provided with a tilt sensor 250 for detecting the tilt of the traveling vehicle body 2 in the pitching direction, and is electrically connected to the control unit 200.

  Further, the passenger rice transplanter 1 of the present embodiment is provided with an alarm sound generation device 260 that generates an alarm sound according to a command from the control unit 200, and is electrically connected to the control unit 200.

  In addition, the control unit 200 of the riding rice transplanter 1 of the present embodiment includes a memory unit 201 and an operation unit 202.

  The memory unit 201 stores in advance position information of a portion having a history of past sinking in the field which is a target of planting work (this is simply referred to as sinking history position information). Moreover, the memory part 201 is the structure which can memorize | store the positional information etc. of the target travel route which the riding rice transplanter 1 should drive | work at the time of the planting work in the said field.

  In addition, the calculation unit 202 is the actual position information (position coordinate value) in the field of the riding rice transplanter 1 acquired by the positioning device 210, and the sinking history position information (position coordinate value) stored in advance in the memory unit 201. And the calculation of whether or not the position coordinate value indicated by the actual position information of the riding rice transplanter 1 falls within a predetermined range centering on the position coordinate value indicated by the sinking history position information is there.

  The traveling vehicle body 2 of the present embodiment corresponds to an example of the traveling vehicle body of the present invention, and the planting apparatus 100 of the present embodiment corresponds to an example of a working device of the present invention. Further, the cockpit 10 of the present embodiment corresponds to an example of the cockpit of the present invention. Further, the configuration including the pair of left and right front side steps 13A and the pair of left and right rear side steps 14A of the present embodiment corresponds to an example of the floor step of the present invention. The rolled seedling 19 of the present embodiment is an example of the working material of the present invention, and each of the first rolled seedling detection sensor 60A to the fourth rolled seedling detection sensor 60D of the present embodiment is the working material of the present invention It corresponds to an example of the detection unit.

  The control unit 200 of the present embodiment corresponds to an example of the control unit of the present invention, and corresponds to an example of the memory unit 201 of the present embodiment. The positioning device 210 of the present embodiment corresponds to an example of the positioning device of the present invention It corresponds to. Further, the alarm sound generation device 260 of the present embodiment corresponds to an example of the alarm unit of the present invention.

  Next, a control operation for preventing sinking and reserve seedling prevention based on the above configuration will be described mainly with reference to FIG.

(1) About the control operation of the sinking prevention:
When the control unit 200 receives a signal indicating an ON state from all the sensors of the first rolled seedling detection sensor 60A to the fourth rolled seedling detection sensor 60D for a predetermined time (for example, one minute) or more, the control unit 200 performs winding Seedlings 19 are placed on the pair of left and right front side steps 13A and the pair of left and right rear side steps 14A in addition to the seedling seedling frame 15 for replenishment, and the riding rice planter 1 is loaded with a large amount of spare seedlings. judge.

  Here, when a signal indicating an ON state is received from the first rolled seedling detection sensor 60A to the fourth rolled seedling detection sensor 60D for a predetermined time or more, the control unit 200 determines that the rolled seedling 19 is placed. By adopting the configuration, it is possible to eliminate the reception of an intermittent signal indicating an ON state due to a malfunction due to the vibration or the like of the first rolled seedling detection sensor 60A to the fourth rolled seedling detection sensor 60D, so control accuracy can be improved.

  Next, at least one of the situations (a) to (d) shown below is a condition that the control unit 200 has determined that the riding rice transplanter 1 is in a large loading state of spare seedlings. When receiving the occurrence, the control unit 200 determines that there is a danger of sinking, issues a predetermined command to the alarm sound generation device 260, and generates a first alarm sound.

  As a result, the worker who heard the first alarm sound can recognize in advance that there is a risk of sinking, so it is possible to immediately judge the treatment necessary for avoiding sinking from the current situation. Can be transferred to action. As a result, it is possible to prevent sinking, and work efficiency is improved.

  (A) Actual position information (position coordinate value) in the field of the riding rice transplanter 1 acquired by the positioning device 210 by calculation of the calculation unit 202, and depression history position information stored in advance in the memory unit 201 (( Compared with the position coordinate value), it is detected that the position coordinate value indicated by the actual position information of the riding rice transplanter 1 falls within a predetermined range centered on the position coordinate value indicated by the sinking history position information , When accepted by the control unit 200.

  In this case, when the operation unit 202 calculates that the riding rice transplanter 1 has come out from within a predetermined range centered on the position coordinate value indicated by the sinking history position information, the control unit 200 may be in danger of sinking. It is determined that the nature is lost, and the alarm sound generator 260 is made to stop the generation of the alarm sound.

  (B) The real position information (positional coordinate value) in the field of the riding rice planter 1 acquired by the positioning device 210 is compared continuously in time by the calculation of the calculation unit 202, thereby When it is detected that the position information has not changed for a fixed time (for example, 20 seconds) and received by the control unit 200.

  In this case, when the rotation of the rear wheel is detected by the rear wheel rotation detection sensor 230, the control unit 200 recognizes that the riding rice transplanter 1 has started to move, and determines that the danger of sinking has disappeared. Thus, the alarm sound generator 260 is made to stop the generation of the alarm sound.

  (C) Calculated by the rear wheel rotation number from the rear wheel rotation detection sensor 230 for the vehicle speed according to the HST lever position specified by the position detection signal from the HST lever position detection sensor 240 by calculation of the calculation unit 202 When the low speed is detected and accepted by the control unit 200.

  In this case, the case where the operator depresses the brake and intentionally reduces the vehicle speed is also included.

  Further, in this case, when it is detected that the vehicle speed calculated by the rear wheel rotational speed from the rear wheel rotation detection sensor 230 has returned to the vehicle speed according to the HST lever position, the control unit 200 causes a danger of sinking. It is determined that the nature is lost, and the alarm sound generator 260 is made to stop the generation of the alarm sound.

  (D) The riding rice planter 1 is tilted upward by a predetermined angle or more by the signal from the tilt detection sensor 250, and the vehicle speed of the riding rice planter 1 is at a predetermined speed by the signal from the rear wheel rotation detection sensor 230. When the control unit 200 recognizes that the vehicle is moving forward in the following.

  Further, in this case, when the control unit 200 recognizes that the inclination angle and the vehicle speed no longer satisfy the predetermined condition, the control unit 200 determines that the danger of sinking disappears, and the alarm sound generation device 260 Stop the generation of alarm sound.

  In addition to the case described in the above items (a) to (d), for example, the control unit 200 recognizes that the front wheel or the rear wheel is stuck, or the front wheel or the rear wheel is slipping. Even when the control unit 200 recognizes a thing, the control unit 200 determines that there is a danger of sinking, issues a predetermined command to the alarm sound generation device 260, and generates a first alarm sound. It is good also as composition.

  In the above item (a), although the configuration in which the sinking history position information is stored in advance in the memory unit 201 has been described, the present invention is not limited to this. It is good also as composition which stored beforehand position information on a portion to have in memory part 201. Also in this configuration, the position coordinate value indicated by the position information of the position where the position coordinate value indicated by the actual position information of the riding rice transplanter 1 has slipped or stacked is the same as the content described in the item (a) above. When it is detected that it has entered a predetermined range centered on the value and received by the control unit 200, a predetermined command is issued to the alarm sound generator 260 to generate a first alarm sound. In the case of this configuration, the position information of a portion having a past slip or stuck history in the field to be worked corresponds to an example of the position information of a portion having a possibility of sinking in the field of the present invention.

  In the above item (a), although the configuration in which the sink history position information is stored in advance in the memory unit 201 has been described, the present invention is not limited thereto, for example, other position information for specifying each of a plurality of fields. In addition, information on whether or not each field is a wet field and information on whether or not the field is deep may be stored in advance in the memory unit 201 in association with position information on each field. Also in this configuration, the field to be worked is identified from the actual position information of the riding rice transplanter 1, the position information of the corresponding field is extracted from the plurality of fields stored in advance in the memory unit 201, The control unit 200 determines whether or not the field corresponding to the position information is a wet field or a deep field, and the determination result indicates that the field where the operation is actually started is a wet field or a deep field. If yes, the controller 200 issues a predetermined command to the alarm sound generator 260 to generate a first alarm sound.

(2) About control operation of prevention of reserve seedling shortage:
When the control unit 200 receives a signal indicating the OFF state from all the sensors of the first to fourth rolled seedling detecting sensors 60A to 60D for a predetermined time (for example, one minute) or more, the control unit 200 sets a reserve It is determined that the number of rolled seedlings 19 placed as seedlings is low, and a predetermined command is issued to the alarm sound generator 260, and a second alarm sound different from the first alarm sound Generate

  As a result, the worker who has heard the second alarm sound can recognize that the situation of the spare seedling is approaching before the spare seedling is completely gone, so the spare seedling out situation is avoided. In order to do this, it is possible to carry out an early spare seedling replenishment work, and work efficiency is improved.

  Here, the second alarm sound is generated to alert the operator, but the present invention is not limited to this. For example, the mascot 70 (see FIGS. 1 and 4) may be blinked or separately lit. Regardless of the configuration, a lamp may be provided, or a display may be made to notify the need for seedling supply on the display unit of the terminal device carried by the seedling carrier who is waiting at the time of the incident, etc. good.

  The sinking history position information in the field according to the present embodiment corresponds to an example of the field state information of the present invention. Further, the information described in the above item (b) of the present embodiment that the position information of the riding rice transplanter 1 has not changed for a predetermined time (for example, 20 seconds) is an example of the state information of the work vehicle of the present invention. It corresponds to. Further, the vehicle speed calculated by the rear wheel rotation number from the rear wheel rotation detection sensor 230 is lower than the vehicle speed set according to the HST lever position described in the item (c) of the present embodiment. The information corresponds to an example of the work vehicle state information of the present invention. In addition, the riding rice planter 1 is inclined upward by a predetermined angle or more as described in the item (d) of the present embodiment, and the vehicle speed of the riding rice planter 1 advances at a predetermined speed or less The information of “I” is an example of the state information of the work vehicle of the present invention.

  Next, the seat portion 20 on which an assistant who performs assisting work can sit will be further described using FIGS. 4 and 7.

  FIG. 7 is a schematic partial enlarged plan view of the lower portion of the seat portion 20 cut in a horizontal plane, looking downward.

  The seat portion 20 includes a seat main body 21 formed by forming a pipe-like member into a substantially gate-like shape in a front view, and a substantially cylindrical member 22 having a cushioning property mounted on the outer peripheral surface of the upper end of the seat main body 21. It consists of The lower part of the seat body 21 projects vertically from the rear end side of the engine cover 9, and the upper part of the seat body 21 is inclined in the forward direction with reference to the lower part.

  The provision of the substantially cylindrical member 22 having cushioning properties makes the assistant comfortable when seated. Further, since the upper portion of the seat body 21 is inclined in the forward direction, the seedling tank 110 is not disturbed when the seedling tank 110 is replenished. Further, although the upper portion of the seat body 21 is inclined in the forward direction, the portion where the substantially cylindrical member 22 is provided is positioned in the direction from the backrest portion of the cockpit 10, so the cockpit 10 It does not get in the way of the workers sitting in the room.

  Further, as shown in FIGS. 4 and 7, the above-described engine cover 9 is a pipe-like member, and has a first frame 81 which has a substantially gate-like shape in a plan view, and respective rear end portions 82La and 82Ra. It is supported by a pair of left and right second frames 82L and 82R which are pipe-like members fixed by welding to the first frame 81.

  A substantially rectangular shape in a plan view in a space surrounded by three sides by the front end 81a of the first frame 81, the rear end 82La of the left second frame 82L, and the rear end 82Ra of the right second frame 82R 7 (see FIG. 7) and has a substantially U-shape in a side view (see FIG. 4), and a seat fixing base 83 is fitted in the front end 81a of the first frame 81 and the left second The rear end 82La of the frame 82L and the rear end 82Ra of the right second frame 82R are firmly fixed by welding.

  A flange portion 84 is welded and fixed in the vicinity of the lower end portions 21 a of the pipes on the left and right sides of the seat body 21. The flange portions 84 welded and fixed to the left and right pipe lower end portions 21a have bent portions 84a in which the end portions on the outer side of the body of the respective flange portions 84 are bent upward (see FIG. 7). The rising height of the bending portion 84 a is substantially the same as the rising height of the front and rear end portions 83 a of the seating portion fixing base 83 bent in a substantially U shape.

  The lower end portions 21a (see FIG. 4) of the left and right sides of the seat body 21 are inserted into the through holes provided on the left and right sides of the seat fixed base 83, and the pair of left and right flange portions 84, 84 are seated. It fixes in the state contact | abutted to the plane part of the left-right both sides of the part fixed base 83. As shown in FIG.

  Thereby, the seating part 20 can be attached easily and firmly, ensuring the seedling replenishment space to the seedling tank 110 of an assistant.

  Further, through holes 85 are respectively provided at corresponding positions of the pair of left and right flanges 84 and 84 and the seating part fixing base 83. Further, in the engine cover 9, the through holes 9 a are similarly formed at positions corresponding to the positions of the through holes 85 in plan view (see FIG. 2).

  Further, in a state in which the left and right flanges 84 are fixed to the flat portion of the seating portion fixing base 83, four sides of the flat portion of the seating portion fixing base 83 are bent in a substantially U shape. It is surrounded in a tray shape by 83a and a bent portion 84a bent upward, and the water droplets falling from the through hole 9a of the engine cover 9 are collected in the portion surrounded by the tray and penetrated It is configured to drop further downward from the hole 85.

  The water droplets dropped from the through holes 85 adhere to the fins of the radiator 86 disposed below to improve the cooling effect.

  Next, an empty box storage case 40 for storing a flexible resin seedling box and the like will be further described mainly with reference to FIG.

  FIG. 8 is a partial enlarged perspective view for explaining the empty box storage case 40, showing the empty box storage case 40 in the storage orientation. In FIG. 8, only the empty box storage case 40 disposed on the left side is illustrated, and the illustration of the empty box storage case 40 disposed on the right side is omitted.

  The safety handrail 30 is disposed at the rear end of the rear floor step 14 and has a substantially portal-shaped first handrail 31 and a pair of substantially inverted L-shaped second handrails 32 disposed at both left and right ends. , Consists of 32.

  The pair of left and right empty box storage cases 40, 40 (see FIG. 2) are rotatably disposed in the pair of left and right second handrails 32, 32, respectively (see arrow A in FIG. 8). It is configured to be able to take a storage posture in which the empty box storage case 40 is stored inside the machine by turning to the direction, and a storing posture in which the seedling box etc. can be stored by turning to the outside of the machine.

  As shown in FIG. 8, the empty box storage case 40 is (1) a box-like portion 41 whose inside and upper part are open when the accommodation posture is taken, and (2) a bottom face portion of the box-like portion 41 A substantially L-shaped support plate 42 for supporting the box-like portion 41 welded and fixed to 41a; and (3) a front view for rotatably supporting the support plate 42 with respect to the second handrail portion 32. And a holding member 43 having a substantially U-shape.

  Further, the front corner portion 42a of the support plate 42, which rotates around the bending portion 32a of the second handrail portion 32, is rotated in the bending portion 32a when the empty box storage case 40 is rotated to be in the storage posture. When the empty box storage case 40 is turned so as to be in the accommodation posture, it abuts against the surface 32a1 (see FIG. 8) facing the inner side of the machine and the rotation is stopped, It is formed in such a manner as to abut on the opposite surface 32a2 (see FIG. 8) to stop its rotation.

  Thus, the empty box storage case 40 can be reliably maintained in the storage position with a simple configuration.

  Further, thereby, the support plate 42 has a support function to support the empty box storage case 40 and a stopper function to stop the rotation in each of the accommodation attitude and the accommodation attitude, thereby reducing the number of parts. It can be planned.

  In the above embodiment, as an example of the state information of the field according to the present invention, the case is described as the sinking history position information in the field. However, the present invention is not limited to this. It may be configured as information (this is simply referred to as unevenness position information). In the case of this configuration, concavo-convex position information is stored in the memory unit 201 in advance. The unevenness position information of this configuration corresponds to an example of position information of a portion having a possibility of sinking in the field of the present invention.

  In the above embodiment, the first to fourth seedling detection sensors 60A to 60D are provided at the front side step 13A and the rear side step 14A, respectively. For example, it may be provided at a position closer to the inner side of the machine, or may be provided at both the outer side and the inner side of the machine, or the presence or absence of a rolled seedling can be detected to exhibit the effect of preventing spared seedlings. It may be provided at any position as long as it is possible.

  Further, in the above embodiment, a rolled seedling has been described as an example of the working material, but the present invention is not limited to this. For example, a fertilizer bag containing fertilizer used for fertilization may be used.

  Moreover, although the above-mentioned embodiment took up and demonstrated the riding rice transplanter as an example of a working vehicle, the working vehicle of this invention is not limited to this.

  According to the present invention, it is possible to provide a work vehicle capable of alerting a worker before the workability decreases, and is useful as a riding rice planter or the like.

1 Riding rice transplanter 2 Driving vehicle 3 Lifting link device 4L Left hopper 4R Right hopper 5L Left front wheel 5R Right front wheel 6L Left rear wheel 6R Right rear wheel 7 Engine 8 Main frame 9 Engine cover 10 Pilot seat 16 HST
18 Receiving antenna 20 Seat portion 30 Safety handrail 40 Empty box accommodation case 60A 1st roll seedling detection sensor 60B 2nd roll seedling detection sensor 60C 3rd roll seedling detection sensor 60D 4th roll seedling detection sensor 100 Planting device

Claims (3)

A traveling car body (2),
A work vehicle (100) connected to the traveling vehicle body (2) for performing a predetermined work on a field, comprising:
Floor steps (13A, 14A) arranged adjacent to a pilot seat (10) of the work vehicle, on which work materials (19) used for the predetermined work can be placed;
A work material detection unit (60A, 60B, 60C, 60D) attached to the floor step (13A, 14A) to detect the presence status of the work material;
Based on the detection result by the work material detection unit (60A, 60B, 60C, 60D) and the status information of the work vehicle or the status information of the field, a warning signal (260) A control unit (200) that determines whether to output
The work vehicle characterized by having. The state information of the work vehicle or the state information of the field is information on the sinking of the work vehicle in the field,
In the control unit (200), the detection result by the work material detection unit (60A, 60B, 60C, 60D) indicates the presence state of the work material, and the state information of the work vehicle or the field The work vehicle according to claim 1, wherein when the state information is information indicating the possibility of the sinking, it is determined that there is a risk of the sinking and the alarm signal is output. A positioning device (210) for acquiring position information of the traveling vehicle body (2);
A memory unit (201) for storing in advance position information of a place having a history of sinking in the field or position information of a place having a possibility of sinking in the field as the state information of the field;
The control unit (200) stores the position information acquired by the positioning device (210) in the memory unit (201) when the detection result indicates the presence status of the working material. The work vehicle according to claim 2, wherein the work vehicle is determined to have the danger of the sinking by entering the predetermined range of the position information of the portion, and the alarm signal is output.

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