JP6238882B2 - Paddy field machine - Google Patents

Description

  The present invention relates to a paddy field work machine provided with a guard device for suppressing abutment of other objects from the laterally outer side on a work device that is mounted on a rear part of a traveling machine body so as to be movable up and down.

As a paddy field work machine provided with the above working devices and guard devices, there exists a thing of the structure given in the following [1], for example.
[1] Both end portions of a support frame that is long in the left-right direction provided in the seedling planting device as a working device are fixed portions, and the base end side of the guard member is rotated around the horizontal axis in the left-right direction with respect to the fixed portions. A guard posture in which the free end side of the guard member is positioned on the outer side of the end portion of the sliding plate in a posture along the horizontal direction to protect the sliding plate, and the free end side slides. A configuration in which the posture can be switched to a retracted posture located on the inner side of the end portion of the plate (see, for example, Patent Document 1).

JP 2012-254025 A (refer to paragraphs “0030” and “0031” and “FIG. 2” and “FIG. 3” in the drawings)

  In the structure shown in Patent Document 1, the sliding plate comes into contact with other objects by providing a guard member that is located on the outer side of the end portion of the sliding plate and protects the sliding plate. This is useful in that the possibility of damage can be reduced. However, this structure has a structure in which the guard member is positioned and detented by inserting / removing the pin member passing through the fixing portion and the guard member. There is room.

  In the present invention, the position change and fixing of the guard member are not performed by the position of the hole of the guard member and the insertion / removal of the positioning pin member, but by the locking body attached to the guard member, the operability is improved. It is intended to avoid a reduction in the strength of the guard member without damaging it.

  The technical means in the paddy field machine of the present invention has the following structural features and operational effects.

[Solution 1]
The technical means of the present invention devised to solve the above-described problems suppresses the contact of a working device that is mounted on the rear part of the traveling machine body so as to be movable up and down, and other objects from the lateral outer side to the working device. And a guard member capable of changing a mounting posture with respect to the fixing portion on the working device side, and an attachment for connecting the guard member to the fixing portion in a predetermined mounting posture. The attachment mechanism includes an engaging portion provided in the fixed portion, and a locking body provided in the guard member so as to be detachable from the engaging portion. With the change of the engagement position of the locking body with respect to the engagement portion, the guard member is positioned on the outer side from the end portion in the left-right direction of the working device and suppresses contact of other objects. The posture and the guard member In the stored position situated in the inner side than the end portion in the direction, the is configured to be changed mounting position of the guard member, the engaging Tometai is of the engaging member relative to the engagement portion A first portion extending in a direction of engagement / disengagement from the guard member to a side away from the fixed portion, and a second portion extending to the opposite side of the first portion across the guard member. A grip operation portion for performing a posture changing operation of the guard member is formed by the first portion of the stationary body.

[Operation and effect of invention according to Solution 1]
According to the above solution, since the posture of the guard member can be changed by operating the locking body provided in the guard member, a plurality of locking holes for changing the posture are formed in the guard member. It does not require a structure that causes a decrease in strength. Therefore, there is an advantage that a structure capable of changing the posture is obtained without impairing the strength of the guard member.
When the guard device protects the work device with the guard member and the posture of the guard member is changed to the retracted posture so that the work device is accommodated in a compact manner, the grip operating portion is farther from the fixed portion than the guard member. Therefore, there is an advantage that the grip guard member can be easily gripped and operated while grasping the position of the locking body according to the position of the grip operation portion.

[Solution 2]
Another technical means of the present invention taken to solve the above problem is that a part of the guard member can be slid and rotated along an axial line in a predetermined direction with respect to the fixed portion. The engaging body is attached to and disengaged from the engaging portion in the same direction as the predetermined direction, and the sliding operation of the guard member with respect to the fixed portion causes the engaging portion to move with respect to the engaging portion. The locking body is engaged and disengaged, and the guard member is configured to change its posture in accordance with the rotation operation of the guard member with respect to the fixed portion. It is provided in the position which cross | intersects the extended line of the axial center line in the sliding location of a guard member.

[Operation and effect of invention according to Solution 2]
According to the above solution 2, since the grip operation part is provided at a position intersecting with the extension line of the axial center line at the sliding position of the guard member with respect to the fixed part, the guard member holding the grip operation part There is an advantage that the push-pull operation and the rotation operation can be easily performed in a state where the guard member is not easily twisted.

[Solution 3]
Another technical means of the present invention taken in order to solve the above problem is that the locking body extends through the guard member and away from the fixed portion.

[Operation and effect of invention according to Solution 3]
According to the above solution 3, since the locking body extends through the guard member and away from the fixed portion, the guard member also serves as a support member for the locking body. There is an advantage that simplification is easy.

[Solution 4]
Another technical means of the present invention taken in order to solve the above-mentioned problem is that the working device includes a leveling float and a float cover that covers an upper side of the leveling float, and the grip operating unit is the float cover. It is provided so that it may be located in the front side rather than the location provided.

[Operations and effects of invention according to Solution 4]
According to the invention relating to the above solution 4, there is an advantage that the grip operation unit does not interfere with the float cover and is easily operated.

It is a whole side view of a riding type rice transplanter. It is a whole top view of a riding type rice transplanter. A guard apparatus is shown, (a) is a side view in a guard attitude | position, (b) is a side view in a retracted attitude | position. The guard device is shown, (a) is a plan view in the guard posture, (b) is a plan view in the retracted posture. A guard device is shown, (a) is a front view in a guard posture, and (b) is a front view in a retracted posture. It is a disassembled perspective view which shows a guard apparatus. It is a longitudinal cross-sectional view which shows a stand mounting part. It is a partially notched top view which shows a muffler support part. It is the IX-IX sectional view taken on the line in FIG. It is the XX sectional view taken on the line in FIG. It is a side view which shows the damper of the cylinder for raising / lowering in a link mechanism. It is explanatory drawing which shows the accessory case under a driver's seat. It is explanatory drawing which shows the conveyance wind introduction means to the fertilizer application in another embodiment. It is a side view which shows the riding type seeder in another embodiment.

Hereinafter, an example of an embodiment of a paddy field machine in the present invention will be described based on the drawings.
In the following description of the embodiment, the front-rear direction and the left-right direction are described as follows unless otherwise specified. In other words, the forward travel direction during the aircraft's work travel is `` front '', the forward travel direction is `` rear '', and the direction corresponding to the right side with respect to the forward and backward direction is `` right '' Similarly, the direction corresponding to the left side is “left”.

〔overall structure〕
FIG. 1 and FIG. 2 show a riding type rice transplanter which is an example of a paddy field working machine.
The riding type rice transplanter includes a self-propelled machine body 1 (corresponding to a traveling machine body) in which a body frame 10 is supported by a pair of left and right front wheels 11F and a pair of left and right rear wheels 11R that can be steered. 1 is connected to a seedling planting device 2 (corresponding to a working device) which can be moved up and down through a link mechanism 12 including a lifting cylinder 13.
The self-propelled airframe 1 is provided with the prime mover 3 in a state where the engine 30 is accommodated in the hood 3 </ b> A while being positioned on the front side. At the rear part of the self-propelled machine body 1, a fertilizer application device 4 as a granular material supply device is provided. A boarding operation unit 5 including a driver's seat 50 and a steering handle 51 is disposed within the distance between the driving unit 3 and the fertilizer application device 4 in the front-rear direction.

In the prime mover 3, as shown in FIG. Inside the bonnet 3A, the engine 30 is arranged in a horizontal posture with a crankshaft (not shown) oriented sideways, a radiator 31 is arranged on the right end side which is one end side in the left-right direction, and the left end on the other end A muffler 32 is disposed in the part.
Although not shown, an output pulley and a transmission belt are disposed on the left end side of the engine 30, and a speed change mechanism in the transmission case 33 located behind the engine 30 via these transmission means. Engine power is transmitted to (not shown).

  The power shifted in the transmission case 33 is transmitted to the front wheel 11 </ b> F and the rear axle case 35 via the transmission shaft 34. The power is transmitted to the rear wheel 11R via a rear wheel drive mechanism (not shown) in the rear axle case 35. The power transmitted to the rear axle case 35 is also transmitted to the feeding portion 41 of the fertilizer application device 4 via a transmission mechanism (not shown), and is also transmitted to the rear seedling planting device 2 via the power extraction shaft 36. Has been.

In the boarding driving unit 5, a driving unit step 52 is provided between the steering handle 51 and the driving seat 50 on the body frame 10. A step 53 for getting on and off to get on and off from the ground is provided on both the left and right sides of the driving unit step 52. The driving unit step 52 is provided not only between the steering handle 51 and the driving seat 50 but also on both the left and right sides of the bonnet 3A, and is configured to be able to get on and off from the front side of the body.
As shown in FIG. 1 and FIG. 2, a reserve seedling base 14 for standing a spare seedling is erected on the lateral outer side of the operation unit step 52 located on the left and right sides of the bonnet 3 </ b> A. Therefore, boarding / alighting from the front of the machine body is performed through the driving unit step 52 between the bonnet 3 </ b> A and the reserve seedling platform 14.

  The fertilizer applicator 4 includes a fertilizer tank 40 that stores powdered fertilizer disposed on the back side of the driver's seat 50, a feeding unit 41 that is disposed below the fertilizer tank 40, and the fertilizer that has been fed out into the seedling planting device 2. And a fertilizer hose 42 to be conveyed toward the groove generator 27 provided in the above. The fertilizer hose 42 is formed of a flexible tube made of a soft resin or the like, and is configured to be elastically deformable with the raising / lowering operation of the seedling planting device 2.

A fertilizer blower 43 is provided at the front lower side of the feed unit 41 as a supply means for transporting the fertilizer fed from the feed unit 41 with the fertilizer hose 42.
As shown in FIG. 2, the blower 43 is disposed at a substantially central position in the left-right direction of the self-propelled aircraft 1 and is rotationally driven by a dedicated blower motor 44. The outside air sucked in by the blower 43 is supplied to the lower part of each feeding portion 41 through the air passage 45 that branches to the left and right. Then, the fertilizer fed out by the feeding unit 41 falls, rides on the sucked outside air, is sent out to the fertilizer hose 42, and is conveyed by wind toward the groove generator 27.

The seedling planting device 2 includes an eight-row planting type seedling platform 20 and a planting device 21 capable of planting eight seedlings, and mat-shaped seedlings placed on the seedling platform 20 are Each strip is separated by a planting claw 21a of the planting device 21 and planted in a field.
The seedling planting device 2 is provided with a feed case 22 to which the power of the engine 30 is transmitted from the self-propelled machine body 1 side via a power take-off shaft 36 at a central position in the left-right direction. The feed case 22 is fixedly supported at the center position of the tool bar 23 extending over almost the entire length of the seedling planting device 2 in the left-right direction. The front end side of the four planting transmission cases 24 for transmitting power to the planting device 21 is connected and fixed to the rear surface side of the tool bar 23 extending to the left and right sides of the feed case 22 and extends rearward. The planting device 21 is equipped on both the left and right sides of the rear end.

The seedling platform 20 is configured to reciprocate horizontally in the left-right direction by a lateral feed mechanism (not shown) provided in the feed case 22. The reciprocating lateral movement range of the seedling platform 20 is a range corresponding to the width in the left-right direction of the seedling placement unit 20a on which one row of seedlings on the seedling platform 20 is placed.
The lateral width of the sliding plate 25 that is positioned on the lower end side of the seedling platform 20 and guides the lateral movement of the seedling platform 20 is determined by the sum of the lateral width of the seedling platform 20 and its reciprocating lateral movement range. Is also set larger. Therefore, in this riding type rice transplanter, the left and right ends of the sliding plate 25 are located at the outermost part of the machine body except for the guard device 6 described later. The sliding plate 25 is connected to and supported by each planting transmission case 24 at a plurality of locations in the length direction.

In the lower part of the seedling planting apparatus 2, a leveling float 26 that touches and slides on the muddy surface is disposed during seedling planting work, and the groover 27 is attached to the leveling float 26.
A float cover 28 for preventing mud splashing from the side float 26B is provided at a position corresponding to the upper part of the front side of the left and right side floats 26B except the center float 26A at the center of the leveling float 26. It has been. The float cover 28 is supported on the upper surface side of the tool bar 23.

[Guard device]
As shown in FIG. 1 to FIG. 6, the guard device 6 includes a guard member 60 capable of changing the mounting posture with respect to the tool bar 23 (corresponding to a fixed portion) of the seedling planting device 2, and the guard member 60. An attachment mechanism 61 for coupling and fixing to the toolbar 23 in a predetermined attachment posture is provided.

The guard member 60 is constituted by a bent rod formed by bending a metal round pipe in the same direction at approximately 90 degrees at two locations in the pipe length direction.
That is, with respect to the pipe portion at the position corresponding to the intermediate portion in the length direction of the metal round pipe, the pipe portions existing on both ends of the pipe portion of the intermediate portion are bent approximately 90 degrees in the same direction. In addition, pipe portions having different lengths are present on each of one end side and the other end side of the pipe portion at a position corresponding to the intermediate portion.
Therefore, the guard member 60 has a long outermost guard portion 60A on one end side of the recumbent portion 60B which is a pipe portion corresponding to the intermediate portion, and a short insertion rod on the other end side of the recumbent portion 60B. There is a portion 60C. The outermost guard portion 60A and the insertion hook portion 60C are provided in a posture that is parallel or substantially parallel to each other and that is orthogonal or substantially orthogonal to the recumbent portion 60B.
Among these, the insertion rod portion 60C having a short length rotates around the pivot axis p1 along the front-rear direction via the attachment mechanism 61 provided at the end portion in the left-right direction of the tool bar 23 that is the fixing portion. And it is supported so that the back-and-forth movement in the direction along the pivot axis p1 is possible.

  Further, the guard member 60 has an engaging portion that penetrates the horizontal flange portion 60B on the side close to the insertion flange portion 60C in the horizontal flange portion 60B, and is parallel or substantially parallel to the insertion flange portion 60C and protrudes in the same direction. A locking pin 62 (corresponding to a locking body) provided with 62a is fixed by welding.

The locking pin 62 extends to the side opposite to the side from which the engaging portion 62a (corresponding to the second portion) protrudes across the horizontal flange portion 60B. A portion (corresponding to the first portion) extending to the opposite side is bent toward the insertion flange portion 60C in the direction along the horizontal flange portion 60B, and the guard member 60 is moved or inserted in the insertion / removal direction. It is comprised in the grip operation part 62b used when rotating around the pivot axis p1 of the collar part 60C.

The grip operation part 62b is provided so as to intersect the extended line of the pivot axis p1. Therefore, it is advantageous in that it is easy to operate the insertion rod portion 60C without twisting by gripping the grip operation portion 62b and moving the guard member 60 in the back-and-forth movement that is the direction along the pivot axis p1.
Further, since the grip operation unit 62b is provided on the front side and laterally outside the float cover 28 supported by the toolbar 23, the grip operation unit 62b is floated when the grip operation unit 62b is gripped. It is easy to avoid contact with the cover 28.

Of the locking pin 62, the engaging portion 62a protruding in the same direction as the insertion rod portion 60C is welded and fixed to a plate-like stopper member 62c extending in the protruding direction from the insertion flange portion 60C side. ing.
The stopper member 62c increases the mounting strength of the locking pin 62 with respect to the guard member 60, and the insertion hook portion 60C and the engaging portion 62a are connected to the attachment mechanism 61 side where the insertion flange portion 60C and the engaging portion 62a can be inserted and removed. It is also used as positioning means for setting the maximum insertion amount.

The attachment mechanism 61 is configured as follows.
A fixing attachment frame 63 for supporting the guard member 60 is welded and fixed to each end portion in the left and right direction of the toolbar 23 extending in the left and right direction.
This fixing mounting frame 63, an urging spring 66 composed of a coil spring for urging the guard member 60 toward the retracting side, a retaining ring 67 for receiving the spring, a retaining pin 68, and the guard member 60 side. An attachment mechanism 61 is configured including the formed pin hole 69.

The fixing mounting frame 63 exists at a distance corresponding to the front-rear direction width of the tool bar 23 and the front plate 63A and the rear plate 63B which are welded and fixed in contact with the front and rear surfaces of the end portion of the tool bar 23. However, an intermediate plate 63C for connecting the front plate 63A and the rear plate 63B is provided and formed in a box shape.
The front plate 63A and the rear plate 63B are provided with one pivotal support hole portion 64 through which the insertion hook portion 60C of the guard member 60 can be inserted and removed, and two engagement hole portions through which the engaging portions 62a of the locking pins 62 can be inserted and removed. 65 is formed.
Of the two engagement holes 65, one engagement hole 65 is the engagement hole 65 on the side where the locking pin 62 is engaged with the guard member 60 in a substantially horizontal guard posture. The engagement hole 65 is constituted by an inner peripheral hole of a cylindrical member 63D that is connected and fixed across the front plate 63A and the rear plate 63B. The other engagement hole 65 is the engagement hole 65 on the side into which the locking pin 62 is engaged with the guard member 60 in a substantially vertical retracted position.

The mounting mechanism 61 configured as described above projects through the fixing mounting frame 63 and protrudes to the other side among the insertion flange portions 60 </ b> C of the guard member 60 inserted into the pivot hole 64 of the fixing mounting frame 63. An urging spring 66 and a retaining ring 67 are attached to the part, and a retaining pin 68 is inserted into the pin hole 69 to support the insertion flange part 60C in a retaining state. The locking pin 62 is engaged with any one of the two engagement hole portions 65 so that the guard member 60 is in either the guard posture or the retracted posture. Fixed to.
In order to change the posture of the guard member 60, the grip operating portion 62b of the locking pin 62 is gripped, the engaging portion 62a is pulled out from the engaging hole portion 65 against the urging force of the urging spring 66, and This is performed by rotating the pivot shaft about the pivot axis p1 to engage the engaging portion 62a in the engaging hole 65 at another position.

[Stand mounting part]
As shown in FIGS. 5 and 7, a stand mounting portion 70 is attached to the tool bar 23 near both ends in the left-right direction. When the seedling planting device 2 is removed from the self-propelled aircraft 1, the stand mounting unit 70 is used to mount a dedicated stand (not shown) so as to support the seedling planting device 2 in a self-supporting posture. Is.
As the stand, a simple columnar one, or one having a caster wheel at its lower part and configured to be movable can be used.

As shown in FIG. 7, the stand mounting unit 70 includes an upper frame 71 formed in a channel shape so as to surround the upper surface and both front and rear surfaces of the toolbar 23, and a lower frame 72 applied to the lower surface side of the toolbar 23. ing. Opposing pieces of the upper frame 71 and the lower frame 72 are connected to each other by a connecting nut 73, whereby the stand mounting portion 70 is connected and fixed at an appropriate position in the length direction of the tool bar 23.
A cylindrical fixed boss 74 is provided on the lower surface side of the lower frame 72, and a dedicated stand is inserted into the fixed boss 74 and screwed.

[Muffler fixing part]
A fixing structure of the muffler 32 provided in the driving unit 3 will be described.
FIGS. 8 and 9 show a muffler fixing portion 80 for supporting the muffler 32 positioned in a posture in which the cylindrical main body 32 </ b> A is aligned in the front-rear direction on the lateral side portion of the engine 30. .
FIG. 8 and FIG. 10 show the connection location between the exhaust pipe 30A and the muffler 32 that are connected to the exhaust manifold (not shown).

As shown in FIGS. 8 and 9, the muffler fixing portion 80 connects a holding member 82 to a support base 81 fixed to the engine 30 side, and the cylindrical shape of the muffler 32 by the holding member 82. The main body 32A is configured to be held and supported.
The holding member 82 includes a curved portion 82A that is curved in an arc shape along the outer peripheral shape of the cylindrical main body 32A, and a pair of plate-like attachment piece portions 82B and 82B that are continuous with both ends of the curved portion 82A. ing. The pair of attachment piece portions 82B and 82B are opposed to each other so that the curved portion 82A has a cylindrical shape.

A pair of front and rear connection holes 83 for connecting the holding member 82 to the support base 81 and a locking hole 84 for suppressing rattling of the holding member 82 are formed in the attachment piece portion 82B. .
The pair of connecting holes 83 are formed as long holes that are long in the left-right direction. Each of the connection holes 83 is inserted into a connection bolt 85 and is configured to be screwed into a set nut 85 </ b> A fixed to the support base 81. The connecting hole 83 and the connecting bolt 85 move relative to each other within the length of the long hole of the connecting hole 83 to adjust the position of the holding member 82 with respect to the support base 81, and the muffler 32 with respect to the engine 30 side. It is possible to connect and fix by adjusting so as to match the separation distance.

  The locking hole 84 is also formed as a long hole that is long in the left-right direction. An L-shaped guide pin 81 </ b> A that is welded and fixed to the lower surface side of the support base 81 is inserted into the locking hole 84. Since the locking hole 84 and the guide pin 81A are located farther in the left-right direction than the connection portion between the connection hole 83 and the connection bolt 85, the holding member 82 can be prevented from rattling in the front-rear direction. Can be suppressed.

A fastening bolt 86 is provided at a location near the curved portion 82 </ b> A in the attachment piece portion 82 </ b> B of the holding member 82. The tightening bolt 86 is used to change the degree of tightening of the muffler 32 with respect to the cylindrical main body 32 </ b> A by the curved portion 82 </ b> A by the degree of tightening of the tightening bolt 86. Therefore, it is possible to change the relative position of the cylindrical main body 32A in the front-rear direction with respect to the holding member 82 by loosening the tightening bolt 86, and by increasing the tightening degree by the tightening bolt 86, Adjustments can be made to prevent relative movement.
The relative movement of the curved portion 82A of the holding member 82 and the cylindrical main body 32A of the muffler 32 in the rotational direction is formed in the engaging hole 82C formed in the curved portion 82A and a part of the cylindrical main body 32A. This is prevented by the engagement with the projected portion 32D.

The muffler 32 has an upstream inlet 32B in the exhaust direction connected to an exhaust pipe 30A connected to an exhaust manifold (not shown) of the engine 30. The exhaust gas introduced from the introduction port portion 32B is discharged from the exhaust port portion 32C on the downstream side through the cylindrical main body 32A.
At the connection point between the exhaust pipe 30A and the introduction port portion 32B, the outer end of the introduction pipe portion 32B is externally fitted to the rear end portion of the exhaust pipe 30A, and the outer side thereof is clamped and fixed by the fastening fitting 87. As shown in FIG. 10, the fastening fitting 87 is configured to fasten and fix a pair of halved cylindrical members 87A and 87A with a pair of fastening bolts 87B and 87B.

At this time, a plurality of slit grooves 32Ba are formed on the front end side of the introduction port portion 32B so that the fastening with the fastening fitting 87 is easy. Then, a bush 88 is provided at a fitting portion between the exhaust pipe 30A and the introduction port portion 32B so that the exhaust gas passing through the connection portion between the exhaust pipe 30A and the introduction port portion 32B does not leak through the slit groove 32Ba. It is inserted.
At this time, as shown in FIG. 8, the position of the rear end portion of the bush 88 matches the boundary portion 32Bb between the large-diameter portion existing on the front end side of the introduction port portion 32B and the taper portion of the rearward constriction. As described above, the position of the muffler 32 in the front-rear direction can be adjusted by the muffler fixing portion 80.

[Link damper]
As shown in FIG. 11, the lifting / lowering cylinder 13 of the link mechanism 12 provided at the rear of the self-propelled machine body 1 has a buffer coil spring 13 </ b> B interposed at a connecting portion between the cylinder rod 13 </ b> A and the link mechanism 12. is there. Furthermore, a damper 15 for attenuating the buffering action of the coil spring 13B is provided at a connection location between the cylinder rod 13A and the link mechanism 12.
As described above, the damper 15 is provided so as to act in parallel with the coil spring 13B, so that the shock at the ascending limit or descending limit position when the link mechanism 12 is moved up and down by the lifting cylinder 13 is reduced. And damping of repetitive vibrations of the coil spring 13B acting for relaxation.

[Storage section]
As shown in FIG. 12, the driver's seat 50 is configured to be able to swing up and down around a swing fulcrum 50a on the front end side.
And the recessed part is provided in the upper part of the seat support part 54 which supports the driver's seat 50, and this recessed part is comprised so that it can utilize as storage parts 55, such as a tool.

[Other Embodiment 1]
In the above-described embodiment, the blower 43 is provided in the fertilizer application device 4 itself, and the structure of the supply wind supply means for conveying the granular material such as fertilizer with the fertilizer hose 42 is illustrated. It is not limited to the structure.
For example, as shown in FIG. 13, an air guide duct 46 that sends cooling air sucked and discharged by the radiator fan 31 </ b> A of the radiator 31 in the driving unit 3 to the air supply path 45 on the fertilizer application device 4 side may be provided. In this case, the inlet side of the air guide duct 46 is squeezed immediately after the radiator fan 31A to guide it to the fertilizer application 4 side while increasing the wind pressure, and is sent from the feeding portion 41 to the air blowing path 45 to which the granular material is supplied. However, the air guide duct 46 may be gradually throttled.
Other configurations may be the same as those in the above-described embodiment.

[Second embodiment]
In the above embodiment, in the riding type rice transplanter, a structure in which the guard member 60 of the guard device 6 is positioned on the lateral outer side of the sliding plate 25 of the seedling planting device 2 is shown. It is not limited.
For example, as shown in FIG. 14, a guard device 6 may be provided in a direct sowing machine (corresponding to a paddy field machine) provided with a seeding device 9. In this case, the guard device 6 is provided so that the guard member 60 is positioned on the laterally outer side of the seeding device 9.

In this structure, in addition to the fertilizer tank 40 of the fertilizer application device 4, a main tank 90 and a sub tank 91 that can accommodate seed pods are provided.
The main tank 90 is mounted at a position near the front portion of the self-propelled aircraft 1, and the sub-tank 91 is provided in the seeding device 9 that is mounted on the rear side of the self-propelled aircraft 1 via the link mechanism 12 so as to be movable up and down. .
In order to convey the seeds from the main tank 90 to the sub-tank 91, a coil spring-like screw conveying device (not shown) is housed in a supply hose 92 having a certain degree of flexibility, and by rotating the screw conveying device. The seed potatoes are conveyed toward the sub tank 91. It is constituted as follows. From the sub-tank 91, seed pods are intermittently dropped and supplied by a predetermined amount from a feeding portion (not shown) below.
Further, the main tank 90 is not limited to such a structure, and for example, the main tank 90 is provided at the rear portion of the self-propelled machine 1 where the fertilizer tank 40 of FIG. The supply hose 92 may be disposed in a state where a sufficient drop is provided in the supply path of the seed soup to 91 so as to supply the seed drop.
Other configurations may be the same as those in the above-described embodiment.

[3 of another embodiment]
In the above embodiment, the insertion hook portion 60C of the guard member 60 rotates around the pivot axis p1 along the front-rear direction with respect to the attachment mechanism 61 on the toolbar 23 side, and the direction along the pivot axis p1. Although the example of the structure supported so that it can be moved back and forth is illustrated, it is not limited to this structure.
For example, the relative movement direction of the insertion hook portion 60C of the guard member 60 with respect to the attachment mechanism 61 may be supported so as to be rotatable about the pivot axis p1 along the left-right direction.
Other configurations may be the same as those in the above-described embodiment.

[4 of another embodiment]
In the above embodiment, the insertion hook portion 60C of the guard member 60 rotates around the pivot axis p1 along the front-rear direction with respect to the attachment mechanism 61 on the toolbar 23 side, and the direction along the pivot axis p1. Although the example of the structure supported so that it can be moved back and forth is illustrated, it is not limited to this structure.
For example, the insertion rod portion 60C of the guard member 60 is formed in a rectangular tube shape, and the attachment mechanism 61 is provided with a square hole portion corresponding to the rectangular tube shape. You may comprise so that insertion / extraction with respect to the attachment mechanism 61 of the side is possible. By configuring in this way, it is configured so that the mounting posture of the guard member 60 can be changed by reinserting the insertion rod portion 60C extracted from the mounting mechanism 61 by changing the posture of the guard member 60. Also good.
Other configurations may be the same as those in the above-described embodiment.

[5 of another embodiment]
In the above-described embodiment, the posture can be changed between two states of a guard posture in which the guard member 60 is substantially horizontal and a retracted posture in which the guard member 60 is substantially vertical. However, the present invention is not limited to this. Absent.
For example, a different posture may be maintained between the guard posture and the retracted posture. Further, the retracted posture may be configured so as to be changed to the upward posture to be the retracted posture, instead of the vertically downward posture that can be used as a stand. Alternatively, the retracted posture may be configured to be changeable in both the vertically downward direction and the upward direction.
Other configurations may be the same as those in the above-described embodiment.

  The paddy field working machine according to the present invention is not limited to a riding type rice transplanter but can be applied to other paddy field working machines such as a walking type rice transplanter and a direct seeding machine.

DESCRIPTION OF SYMBOLS 1 Traveling machine body 2 Working device 6 Guard device 23 Fixed part 26 Float for leveling 28 Float cover 60 Guard member 61 Mounting mechanism 62 Locking body 62b Grip operation part 65 Engagement part p1 Pivot axis (axial center)

Claims (1)

A working device that is mounted on the rear part of the traveling machine so as to be movable up and down;
A guard device for suppressing contact of other objects from the lateral outer side with respect to the working device, and
The guard device includes a guard member capable of changing an attachment posture with respect to the fixing portion on the working device side, and an attachment mechanism for connecting the guard member to the fixing portion in a predetermined attachment posture.
The attachment mechanism includes an engaging portion provided in the fixing portion, and a locking body provided in the guard member so as to be detachable with respect to the engaging portion, and the attachment mechanism. With the change in the engagement position of the locking body, the guard member is positioned on the outer side of the end in the left-right direction of the working device and suppresses contact of other objects, and the guard It is configured such that the mounting posture of the guard member can be changed to a retracted posture in which the member is located on the inner side of the end in the left-right direction of the working device,
The locking body includes a first portion extending to a side farther from the fixing portion than the guard member in the engagement / disengagement direction of the locking body with respect to the engagement portion, and the first portion across the guard member. Has a second portion extending to the opposite side,
The paddy field work machine in which the grip operation part for performing posture change operation of the guard member is formed by the 1st portion among the latching bodies.

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