JP5763478B2 - Rice transplanter - Google Patents

Description

  The present invention includes a plurality of planting front and rear planting drive cases arranged in a lateral direction of the machine body, and a planting machine body frame configured to include a body laterally connecting member that connects front end sides of the plurality of planting drive cases, From the seedling planting mechanism that is supported by the rear end of each planting drive case so as to be freely driven, a groove forming device that forms a groove for supplying fertilizer to the farm scene on the front side of the machine body from the seedling planting location by the seedling planting mechanism, and a tank It is related with the rice transplanter provided with the fertilizer supply path which supplies the drawn-out fertilizer to the said grooving machine by conveyance wind.

Conventionally, for example, there has been a rice transplanter disclosed in Patent Document 1. This planting machine, a fertilizer in the fertilizer hopper feeding device Ri put Repetitive was pumped to create grooves unit via the fertilizer hoses fed manure in the operation of the blower, planting work groove unit is by planting mechanism seedlings It is comprised so that a fertilizer may be embed | buried in the side part of this, and the relief valve which can release air with a fertilizer hose is provided.

JP-A-2005-204541

As a fertilizer supply path that supplies fertilizer fed from the tank to the grooving device, those that use fertilizer supply by conveying wind, by providing an air venting air path that communicates with the fertilizer supply path, It is possible to prevent or suppress the occurrence of poor fertilization due to the conveying air flowing out of the grooving device. That is, when the amount of conveying air flowing out from the groove producing device increases, the fertilizer supplied to the field by the groove producing device is excessively diffused by the conveying air flowing out from the groove producing device. However, if it is configured to allow the removal of the conveyance air through the fertilizer supply path, the amount of conveyance air flowing out of the grooving device can be reduced to a small amount compared to the amount of conveyance air sent into the fertilizer supply channel, and the Excessive diffusion of the supplied fertilizer due to the conveying wind can be suppressed.
However, when it is configured to allow the removal of the conveying wind in the fertilizer supply path, the fertilizer powder may flow out along with the conveying wind that escapes from the fertilizer supply path, and the discharged fertilizer scatters and forms the planting machine frame If the member falls and remains on the member, problems such as rusting on the connecting member may occur.

  An object of the present invention is to provide a rice transplanter that not only makes it possible to avoid the above-mentioned problems but also makes it possible to avoid mud traps due to this while allowing the conveyance wind to escape in the fertilizer supply path. There is to do.

The first invention includes a plurality of planting front and rear planting drive cases arranged in a lateral direction of the machine body, and a planting machine body frame configured to connect a front side of the plurality of planting drive cases to the front side of the machine body, A seedling planting mechanism that is supported in a rear end portion of each of the plurality of planting drive cases, and a grooving device that forms a groove for supplying fertilizer to a farm scene on the front side of the machine body from a seedling planting location by the seedling planting mechanism; In a rice transplanter equipped with a fertilizer supply path for supplying fertilizer fed from a tank to the grooving device by conveying air,
The exhaust port of the air vent air passage communicating with the fertilizer supply passage is positioned at a lower arrangement height than the upper end of the connecting member, and overlaps with the fertilizer supply passage in the longitudinal direction of the machine body in front of the fertilizer supply passage. Placed so that
A lid body that can be opened and closed by wind pressure and closed by gravity is provided at the exhaust port so that it can swing up and down, and an external force in the closing direction due to gravity acts on the lid body in the fully open position. In addition, a stopper for restricting the swinging movement of the lid is provided.

  According to the structure of this 1st invention, even if there is much conveyance air volume sent to a fertilizer supply path, one part escapes from an air venting air path, and the conveyance air volume which escapes from a grooving device becomes the conveyance air volume sent to the fertilizer supply path. Compared to a small amount. The exhaust vent of the air venting air passage is arranged at a position lower than the upper end of the connecting member, so that it is difficult for the fertilizer that has flowed out of the air venting air passage along with the conveying air to rise to the connecting member. It is easy to avoid falling on the connecting member. Even if the exhaust port is placed lower than the upper end of the connection member so that the fertilizer that has flowed out of the air venting air does not easily fall onto the connection member, the exhaust port overlaps the fertilizer supply channel and the longitudinal direction of the machine in front of the fertilizer supply channel. The fertilizer supply channel has a shielding function that makes it difficult for the mud soil jumped up by the seedling planting mechanism to plant the seedlings to reach the exhaust port. Can be difficult to adhere.

  Therefore, even if there is a large amount of conveying air sent to the fertilizer supply channel, fertilizer that flows out from the air venting air channel while preventing or suppressing fertilizer application failure such as fertilizer diffusion due to the conveying air flowing out from the grooving device It is possible to obtain an advantageous rice transplanter that can easily avoid problems such as rusting of the connecting member due to, and clogging of the exhaust port due to the lifting mud by the seedling planting mechanism.

According to the configuration of the first aspect of the present invention, the exhaust port is opened and closed by a simple lid body that is opened and closed by wind pressure and gravity, and the exhaust port is made to be muddy water without causing any trouble in the air flow through the air venting air passage. It can be closed to prevent entry.

  In the case of a lid that can be swung up and down that is closed by gravity, if it opens beyond the dead point, it cannot be closed even if it is lowered by gravity. On the other hand, even if a strong opening operation due to the carrier wind through which the lid comes off or a shocking opening operation due to the vibration of the airframe may occur, the full opening posture will act as an external force in the closing direction. As the opening operation is released, the lid is reliably lowered and swung by the gravity closing operation to return to the closed position.

  Therefore, although a lid having a simple structure is employed, the lid does not remain open due to strong wind pressure, vibration, or the like, and the exhaust port can be reliably closed so as to prevent entry of muddy water or the like.

In the second aspect of the invention , the air venting air passage is formed by a cover that covers an outer peripheral side of the upper end portion of the groove producing device and an outer peripheral side of the end portion of the fertilizer supply passage communicating with the upper end portion of the groove producing device, The exhaust port is formed in the cover.

According to the configuration of the second aspect of the invention , the air venting air passage can be formed by utilizing the cover that covers the grooving device and the fertilizer supply passage as the air passage forming means.

  Therefore, the cover can be used at low cost to provide an air bleed air passage where the exhaust port is located at a low height so that the fertilizer discharged from the air bleed air passage is unlikely to fall on the connecting member of the planting machine frame. it can.

In the third aspect of the invention , the cover is formed in a shape that opens downward in the cover at a position lower than the exhaust port and on the outer peripheral side of the groover.

According to the configuration of the third aspect of the invention , in addition to the conveyance air flowing into the groove forming device from the fertilizer supply passage and exiting into the cover, the conveying air flows out of the cover from the air bleeding air passage, and the cover is also covered between the cover and the groove forming device. Even when there is a large amount of air flow that is sent to the fertilizer supply path, the amount of air that flows out of the cover increases, and the amount of air that flows out of the grooving device toward the field can be suppressed to a small amount. Moreover, even if the exhaust port of the air venting air passage is reduced in diameter, the amount of transport air flowing out from the grooving device toward the field can be suppressed to a small amount.

  Therefore, even when the amount of conveyance air sent to the fertilizer supply path is extremely large, poor fertilizer application such as fertilizer diffusion due to the conveyance air flowing out from the grooving device can be prevented or suppressed satisfactorily. In addition, the exhaust port of the air vent air passage can be made small so that muddy water or the like is not easily entered.

According to the fourth aspect of the present invention , the cover is made of an elastic material, and a protrusion that abuts the groover is provided on the cover so as to secure a gap between the cover and the groover.

According to the configuration of the fourth aspect of the present invention , even when the shape of the cover becomes complicated due to the formation of an air bleeding air path by the cover, the cover can be easily formed by an elastic material that can be easily molded.

  Even if the cover is elastically deformed toward the inner grooving device due to mud water, etc., the gap between the cover and the grooving device can be secured by the protrusion, and the air venting air path for deformation of the cover Can be suppressed.

  Therefore, although the air venting air passage is formed by the cover and the cover is easily formed by the elastic material, even when the cover is deformed, it is possible to suppress the air vent air passage from being narrowed. Can be smoothly removed.

The fifth invention provides a clogging sensor for detecting fertilizer clogging at an inner upper position of the groove producing device,
Of the cylindrical body forming the fertilizer supply path, the tip portion inserted into the groove producing device is configured such that the region located on the clogging sensor side is the longest.

According to the configuration of the fifth aspect of the invention , the fertilizer from the fertilizer supply path is diffused to the side away from the clogging sensor by receiving the guide from the tip of the cylinder due to the longest region on the clogging sensor side of the cylindrical body. However, the fertilizer can be made difficult to flow to the side where the clogging sensor is located by flowing down the inside of the grooving device.

  Therefore, even if an opening such as a notch for installing a clogging sensor electric wire is provided in the grooving device, it is easy to avoid leakage of fertilizer from the opening.

It is a side view which shows the whole rice transplanter. It is a top view which shows the whole rice transplanter. It is a side view which shows a seedling planting apparatus. It is a front view which shows a seedling planting apparatus. It is a vertical side view which shows the site | part which a groove producing device and a fertilizer supply path connect. It is a front view which shows the site | part which a groove producing device and a fertilizer supply path connect. It is a vertical side view which shows the arrangement | positioning part of an exhaust port. It is a cross-sectional top view which shows the site | part which a groove producing device and a fertilizer supply path connect.

  FIG. 1 is a side view showing an entire rice transplanter according to an embodiment of the present invention. FIG. 2 is a plan view showing the whole rice transplanter according to the embodiment of the present invention. As shown in these drawings, the rice transplanter according to the embodiment of the present invention self-propels by a pair of left and right steering operations and driveable front wheels 10 and 10 and a pair of left and right driveable rear wheels 11 and 11. A seedling planting device 4 is connected to the rear part of the riding type traveling machine body 1 via a link mechanism 3 that moves up and down by the operation of the hydraulic cylinder 2, and is provided on the rear side of the driving seat 13 of the traveling machine body 1. The fertilizer application device 5 provided with the tank 21 is provided.

The traveling machine body 1 will be described.
As shown in FIGS. 1 and 2, the traveling machine body 1 transmits power from an engine 6 mounted on the front thereof via a belt-type transmission device 7 and a hydrostatic continuously variable transmission 8. 9 and is configured in a four-wheel drive type in which traveling power from the gear type transmission device 9 is transmitted to the left and right front wheels 10 and the rear wheels 11. On the rear side of the traveling machine body 1, a riding-type driving unit 14 including a steering wheel 12 that steers the left and right front wheels 10 and a driving seat 13 is formed.

The seedling planting device 4 will be described.
FIG. 3 is a side view showing the seedling planting device 4. As shown in FIG. 1 and FIGS. 1 and 2, the seedling planting device 4 is connected to the rear ends of the upper link 3 a and the lower link 3 b constituting the link mechanism 3 through the connecting frame 3 c in the lateral direction of the planting machine body. A planting machine frame 30 is provided that includes a connecting member 28 that is long in the lateral direction of the planting machine to which the intermediate portion is coupled. The connecting member 28 is made of a hollow steel material having a rectangular longitudinal cross-sectional shape. The planting machine frame 30 includes the connecting member 28 and also extends from three locations in the longitudinal direction of the connecting member 28 in the rearward direction of the planting machine body, with the front end side being connected by the connecting member 28. It is configured to include three planting drive cases 29 facing in the front-rear direction of the planting machine lined up at predetermined intervals in the lateral direction.

  The seedling planting device 4 includes six seedling planting mechanisms 18 that are movably provided one by one on both lateral sides of the rear end portion of each planting drive case 29, and the lower end side above the front end side of the planting machine frame 30. Seedling stands 17 provided in an inclined posture located at the rear side of the planting machine body, arranged one by one below each planting drive case 29 and arranged below the planting machine body frame 30 in the lateral direction of the planting machine body. Three grounding floats 15 are provided. Each seedling planting mechanism 18 includes a rotary rotor 18a that is rotatably supported by a planting drive case 29. The rotary rotor 18a is rotationally driven to be distributed at both ends of the rotary rotor 18a. It is configured in a rotary manner so that seedlings are alternately taken out from the lower end portion of the seedling placing stand 17 by a certain pair of planting arms 18b, 18b, and a seedling planting exercise is performed so as to plant the taken out seedlings in a field scene.

As shown in FIGS. 3 and 4, the seedling planting device 4 is provided with a feed case 16 to which working power from the gear type transmission device 9 of the traveling machine body 1 is input in a state supported by the connecting member 28. the use motive power transmitted to the seedling planting drive case 29 via the transmission shaft 31a of the housing from the feed case 16 to the transmission case 31 to drive the six seedling planting mechanism 18. The seedling planting device 4 includes a seedling lateral feed mechanism 40 having a seedling lateral feed shaft 41 supported at one end of the feed case 16 so as to be freely rotatable. The seedling placing table 17 is seeded by the seedling lateral feed mechanism 40. In conjunction with the seedling planting movement of the mechanism 18, the planting machine is reciprocated in the lateral direction. Thus, seedling stand 17, sequentially taken out seedlings toward the other end side from the side end side of the lower end portion of the mat Jonae each seedling planting only mechanism 18 is mounted on the seedling base 17 as described above, it transferred to the planting machine body transverse direction the placed mat Jonae six seedlings placing section against seedling planting only mechanism 18. The seedling planting device 4 includes a seedling vertical feed mechanism 45 having a seedling vertical feed shaft 46 supported on a feed case 16 so that one end side of the seedling can be freely rotated. When reaching, the seedling vertical feeding belt 47 provided in the six seedling placement units of the seedling placing table 17 is rotationally driven by a seedling vertical feeding mechanism 45 by a predetermined stroke, and the mat-like seedlings placed on the seedling placing table 17 are driven. The seedling planting mechanism 18 feeds the seedlings vertically to the seedling planting mechanism 18 by an amount corresponding to the size of the seedlings in the vertical direction.

  Therefore, in the seedling planting device 4, the grounding float 15 descends to the field scene by the lifting operation of the link mechanism 3 by the hydraulic cylinder 2, and the descending work state in which each grounding float 15 rises from the field scene rises. The elevator is moved up and down to the non-working state. The seedling planting device 4 that has been lowered to the descending work state is configured so that each seedling planting mechanism 18, the seedling lateral feed mechanism 40, and the seedlings are transmitted by working power transmitted from the traveling machine body 1 to the feed case 16 as the traveling machine body 1 travels. The vertical feed mechanism 45 is driven and six seedlings are planted by the six seedling planting mechanisms 18. Each seedling planting mechanism 18 plants a seedling on a field scene prepared in advance by sliding the grounding float 15.

The fertilizer application device 5 will be described.
As shown in FIGS. 1 and 2, the fertilizer applicator 5 includes a tank 21 formed in a hopper shape, four feeding mechanisms 20 arranged side by side in the traveling machine body at the bottom of the tank 21, and a lower side of the driver seat 13. The blower 22 provided in a state where it is supported by the machine frame of the traveling machine body 1 and the six groovers 19 provided in the seedling planting apparatus 4 in the lateral direction of the planting machine body.

  The four feeding mechanisms 20 include a feeding case (not shown) in which a feeding roll (not shown) that is rotationally driven by power from a transmission system that transmits working power to the seedling planting device 4 is provided, The granular fertilizer stored in the tank 21 is configured to be fed to a pair of left and right delivery parts 20a, 20a provided at the lower part of the feeding case by a feeding roll.

The blower 22 is driven by an electric motor and sucks air in the vicinity of the exhaust muffler 36, which has risen in temperature due to heat radiation of the exhaust muffler 36 of the engine 6 and exhaust of the exhaust muffler 36, through the intake duct 35, and is higher than normal temperature. Are generated, and the generated conveying air is supplied to the delivery sections 20 a of the four feeding mechanisms 20 through the air duct 37.

  A fertilizer supply path 23 formed by a hose 27 or the like extends from one or both of a pair of left and right delivery parts 20a, 20a included in each of the four feeding mechanisms 20 and extends from the four feeding mechanisms 20. The extended end portions of a total of six fertilizer supply paths 23 are connected to six groove forming devices 19 separately.

As shown in FIG. 1, 3, 4, 5, 6 Sakumizo unit 19, one seedling planting mechanism 18 forward close to one at the ground in a row on the planting machine body transverse direction in an arrangement that positions float 15 is supported. Each grooving device 19 includes a supply portion 19a made of a bent sheet metal formed so that the shape of the planting machine body as viewed in the vertical direction is a groove shape opened toward the rear of the machine body, and the front side of the lower portion of the supply part 19a And a groove forming portion 19b extending forward. Each groover 19 is supported by the ground float 15 by connecting the groove 19b to the ground float 15.

  The fertilizer supply path 23 that connects the feeding portion 20a of the feeding mechanism 20 and the groove generator 19 includes a hose 27 that extends from the feeding portion 20a of the feeding mechanism 20 toward the traveling machine body, and an extending end portion of the hose 27. The upper end is connected to the lower end of the communication pipe 24 and the lower end is connected to the lower end of the grooved grooving device. 19 is formed by a cylinder 25 communicating with the upper end portion of the supply portion 19a.

The hose 27 is configured by a flexible hose so as to bend as the seedling planting device 4 is moved up and down. The communication pipe 24 is formed of a material that makes the communication pipe 24 inflexible. Specifically, the communication pipe 24 is formed of a translucent synthetic resin material. The communication pipe 24 is composed of a pair of upper and lower plantings provided on the planting machine body side by connecting hooks 50 and 51 integrally formed at both upper and lower ends of the communication pipe 24 and a locking pin 52 having one end connected to the upper end of the communication pipe 24. It is not supported by the attached machine body sideways of the support rod 53, 54. That is, as shown in FIGS. 3 and 4, the connecting hook 50 of the upward opening located on the upper end side of the communication pipe 24 is engaged with the upper support rod 53 from below, and the downward opening located on the lower end side of the communication pipe 24. The connecting hook 51 is engaged with the lower support rod 54 from above. Toe engaging entering the other end of the locking pin 52 into the pin hole provided on the upper side of the supporting rod 53, there is performed the positioning in the planting machine body transverse direction relative to the support rod 53 of the communication pipe 24 by the locking pin 52 . The upper support rod 53 is installed on a pair of left and right columns 26 and 26 that are erected upward from the connection member 28 constituting the planting machine frame 30 and slidably support the upper end side of the seedling mount 17. It is. The lower support rod 54 is installed on the planting drive case 29 constituting the planting machine frame 30.

Therefore, the fertilizer application device 5 performs the fertilization operation of supplying fertilizer near the lateral sides of each of the six planted seedlings as the seedling planting device 4 performs the six-row planted seedling planting operation.
That is, the four feeding mechanisms 20 feed the fertilizers stored in the tanks 21 to the respective sending units 20a, and the six fertilizer supply paths 23 each supply the fertilizer fed to the sending units 20a to the sending unit 20a by the blower 22. Then, the air is supplied to the supply unit 19a of the grooving device 19 by the conveying air flowing into the fertilizer supply path 23 from the delivery unit 20a. Six Sakumizo 19 respectively, in the planting body front side of the planting locations by seedling planting only mechanism 18, will form a groove in the field plane by work groove 19b, fertilizer supplied by the supply portion 19a to the groove Fertilizer is supplied from the road 23. The groove after the fertilizer is supplied by the grooving device 19 is filled by mud squeezing by a backfill plate 39 disposed behind the grooving device 19 and provided in the grounded float 15.

  As shown in FIGS. 5 and 8, a clogging sensor S is provided on the inner upper side of the supply section 19 a of the groove producing device 19. The clogging sensor S includes a pair of electrodes that are spaced apart from each other, and the fertilizer adheres to the pair of electrodes, and the state of conduction between the two electrodes is improved and the resistance value is reduced. Detection is activated. When the clogging sensor S is activated, the clogging sensor S activates an alarm device (not shown) provided in the operation unit 14 by outputting detection information to the control means. The clogging sensor S is linked to the control means by an electric wire 56. The electric wire 56 is disposed so as to pass through an opening 19c formed by a notch provided in an upper portion of the supply portion 19a in the groove generator 19.

There was formed as a region 25B located the inserted tip 25 A in the feed section 19a of Sakumizo 19 of the cylinder 25 to form a fertilizer supply passage 23 on the side of the jam sensor S is longest . Specifically, the lower end T1 in the region 25B located on the side where the clogging sensor S is located with respect to the axial core 25a of the cylindrical body 25 is shaped with respect to the axial core 25a of the cylindrical body 25. The tapered shape is formed so as to be positioned at an arrangement height lower than the lower end T2 in the region 25C located on the side opposite to the side where the clogging sensor S is located. That is, the notch is provided in the tip 25A, and the tip 25A has a stepped shape. The notch is formed by cutting in a direction along the axis 25a of the cylinder 25 and cutting in a direction orthogonal to the axis 25a of the cylinder 25.

  Therefore, the fertilizer from the fertilizer supply path 23 flows down to the inside of the supply portion 19a of the grooving device 19 while diffusing to the side away from the clogging sensor S due to the tapered shape of the tip portion 25A of the cylinder 25, and the fertilizer is clogged. Is configured to prevent leakage from the opening 19c to the outside of the supply unit 19a.

  FIG. 5 is a longitudinal side view showing a portion where the groove producing device 19 and the fertilizer supply path 23 communicate with each other in each of the six groove producing devices 19. FIG. 6 is a front view showing a portion of each of the six grooving devices 19 where the grooving device 19 and the fertilizer supply path 23 communicate with each other. FIG. 8 is a cross-sectional plan view showing a portion where each of the six grooving devices 19 communicates with the grooving device 19 and the fertilizer supply path 23. As shown in these drawings, the first and second air venting air passages 61 and 62 are communicated with the fertilizer supply passage 23, and a part of the conveying air supplied to the fertilizer supply passage 23 is supplied to the groove generator 19. It is possible to escape by the first and second air venting air passages 61 and 62 before reaching the lower end of the portion 19a, and flows from the fertilizer supply passage 23 into the supply portion 19a of the grooving device 19 and from the supply portion 19a. It is configured so that the amount of conveyance air blown into the fertilizer supply groove or in the field scene can be made smaller than the amount of conveyance air supplied to the fertilizer supply path 23 by the blower 22.

  The first and second air venting air passages 61 and 62 are formed by a cover 63 provided above the groove producing device 19.

  That is, the cover 63 communicates with the upper end portion of the supply portion 19a of the groove generator 19 so as to cover the outer peripheral side of the upper end portion of the supply portion 19a of the groove generator 19 with a predetermined interval from the upper end portion. The fertilizer supply path 23 to be covered is a portion on the outer peripheral side of the upper end portion of the supply portion 19a of the groove producing device 19 so as to cover the outer peripheral side of the end portion of the fertilizer supply path 23 with a predetermined distance from the end portion, and the cover 63 The cover 63 is formed so as to have a downward opening 66 that opens the interior of the cover 63 downward at a position located at a lower position than the exhaust port 64a provided at the top of the cover. Specifically, the cover 63 extends downward from the upper portion 25U of the cylindrical body 25 forming the fertilizer supply path 23, and the extended end 63b is outside the upper end portion of the supply portion 19a of the groove producing device 19. It is located and formed in the container shape so that it may open downward at the extended end 63b. The cover 63 is made of a rubber material as an example of an elastic material. The cover 63 and the cylinder 25 are integrally formed of a rubber material.

The groove generator 19 moves up and down with respect to the planting machine frame 30 together with the grounding float 15 between the supply section 19a of the groove generator 19 and the distal end portion 25A of the cylindrical body 25 inserted at the upper end of the supply section 19a. A gap C that allows this is provided. An exhaust pipe 64 provided with an exhaust port 64a on the upper end portion of the cover 63 and above the planting machine body is provided, and the conveying wind emitted from the end opening of the fertilizer supply path 23 is moved upward along the inner wall surface of the supply portion 19a. The carrier air flowing in the direction and flowing out from the gap C between the supply part 19a and the cylinder 25 to the outside of the supply part 19a and flowing further upward outside the supply part 19a flows into the exhaust cylinder part 64 and enters the exhaust port. A first air vent 61 is formed so as to exit from the cover 64 to the outside of the cover 63.

  The conveying wind that has exited from the end opening of the fertilizer supply path 23 flows upward along the inner wall surface of the supply unit 19a, flows out of the supply unit 19a from the gap C between the supply unit 19a and the cylindrical body 25, and is supplied to the supply unit 19a. A second air vent 62 is formed so that the conveying air that has flowed downward along the inner surface of the cover 63 after exiting from the outer side of the cover 19a exits from the downward opening 66 of the cover 63 to the outside of the cover 63. .

  As shown in FIG. 3, the exhaust port 64 a of the first air vent air passage 61 is arranged to be positioned at an arrangement height lower than the upper end 28 a of the connecting member 28 constituting the planting machine body frame 30. Even if the fertilizer powder comes out from the first air venting air passage 61 together with the conveying air, the situation where the fertilizer powder coming out of the first air venting air passage 61 falls on the planting machine frame 30 does not occur.

As shown in FIGS. 3 and 6, the exhaust port 64a of the first air vent 61 is disposed in front of the fertilizer supply path 23 so as to overlap the fertilizer supply path 23 and the planting machine front-rear direction, also splashed mud due to the motion to seedling planting only mechanism 18 planted occurs, communication pipe 24 and the cylindrical body 25 to form the fertilizer supply channel 23 exerts a shielding function, splashed mud exhaust port 64a It is the composition which does not adhere to.

  A lid 70 is provided at the exhaust port 64 a of the first air vent 61. The lid 70 is pivotally supported by a support portion 71 provided integrally with the cover 63. The lid 70 swings up and down around the axis P and opens and closes, and the wind pressure of the conveying wind exiting from the exhaust port 64a. Is received by the wind pressure, and when the opening operation is further released, it is supported to be closed by a lowering operation due to gravity acting on the lid 70.

A stopper 72 for the lid 70 is provided integrally with the support portion 71. A lid 70 indicated by a two-dot chain line in FIG. 5 represents the lid in a fully opened posture. As shown in FIGS. 5 and 7, the lid body 70 is lifted and swung to increase the opening angle, and the base end side portion of the lid body 70 comes into contact with the stopper 72 and the rocking restriction by the stopper 72 is restricted. When it is in the received state, it becomes a fully open posture which is the limit of opening. This fully open posture is set to an open posture that does not exceed the top dead center so that gravity acts as an external force in the closing direction.
Therefore, even when the lid 70 is opened to the fully opened posture, when the opening operation is released, the lid 70 is surely lowered by the gravity closing operation and returns to the closed posture.

  As shown in FIGS. 6 and 7, a protrusion 73 is provided on the inner surface side of the left and right lateral side wall portions 63 a of the cover 63. The protrusion 73 is configured by a protrusion in the direction along the supply portion 19 a of the groove generator 19 and the cylindrical body 25. The protrusion 73 is integrally formed with the cover 63.

  When the lateral wall portion 63a of the cover 63 is elastically deformed inward due to the muddy water being pressed, the protrusion 73 comes into contact with the cylindrical body 25 and the supply portion 19a and further into the lateral wall portion 63a. Is a stopper that restricts elastic deformation of the first and second air vent air passages 61a by securing a gap between the side wall portion 63a and the cylindrical body 25 and the supply portion 19a, and by elastic deformation of the side wall portion 63a. It suppresses 62 becoming narrow.

[Another Example]
(1) In the above-mentioned embodiment, the example in which the air venting air passage 61 is formed by the cover 63 is shown. However, the air venting air passage 61 is formed by a cylinder connected in communication with the communication pipe 24 and the cylinder 25 forming the fertilizer supply path 23. May be implemented.

(2) In the above-described embodiment, the cover 63 is made of an elastic material. However, the cover 63 may be made of various metal materials such as sheet metal.

(3) In the above-described embodiment, an example in which a dedicated member for the frame is adopted as the connecting member 28 constituting the planting machine body frame 30, but a transmission case that transmits power to the planting drive case 29 is adopted as the connecting member. May be implemented.

(4) In the above-described embodiment, an example in which a 6-row planting type rice transplanter is configured has been shown. .

  The present invention can be used not only for riding type rice transplanters but also for walking type rice transplanters.

18 Seedling planting mechanism 19 Grower 21 Tank 23 Fertilizer supply path 25 Cylinder 25A Cylinder tip 25B Region 28 Connecting member 28a Upper end 29 Planting drive case 30 Planting machine frame 61 Air venting air path 63 Cover 64a Exhaust port 70 Lid Body 72 Stopper 73 Projection S Clogging sensor

Claims (5)

A plurality of planting drive cases arranged in the machine body transverse direction and a planting machine frame configured to include a machine body lateral connection member that connects front end sides of the plurality of planting drive cases, and each of the plurality of planting drive cases. A seedling planting mechanism that is supported by the rear end of the plant so as to be driven freely, a grooving device that forms a groove for supplying fertilizer to the farm scene on the front side of the machine body from the seedling planting position by the seedling planting mechanism, and a fertilizer fed from the tank And a fertilizer supply path for supplying the grooving device by a conveying wind,
The exhaust port of the air vent air passage communicating with the fertilizer supply passage is positioned at a lower arrangement height than the upper end of the connecting member, and overlaps with the fertilizer supply passage in the longitudinal direction of the machine body in front of the fertilizer supply passage. Placed so that
A lid body that can be opened and closed by wind pressure and closed by gravity is provided at the exhaust port so that it can swing up and down, and an external force in the closing direction due to gravity acts on the lid body in the fully open position. A rice transplanter provided with a stopper for restricting the swinging movement of the lid . The air vent air passage is formed by a cover that covers an outer peripheral side of an upper end portion of the groove producing device and an outer peripheral side of an end portion of the fertilizer supply passage communicating with the upper end portion of the groove producing device, and the exhaust port is connected to the cover. The rice transplanter according to claim 1 , wherein the rice transplanter is formed as follows. The rice transplanter according to claim 2 , wherein the cover is formed in a shape that opens downward in the cover at a position lower than the exhaust port and on the outer peripheral side of the groover. 4. The rice transplanter according to claim 2 or 3, wherein the cover is made of an elastic material, and a protrusion is provided on the cover so as to contact the groover so as to secure a gap between the cover and the groover. . A clogging sensor that detects fertilizer clogging is provided at the inner upper position of the groover,
The tip is inserted into the operation groove unit of the cylindrical body forming the fertilizer supply path, any one of claims 1 to 4, area located on the side of the jam sensor are constituted to have the most prolonged Rice transplanter according to one item.

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