JP5523809B2 - Transplanter - Google Patents

Description

  The present invention relates to a transplanter equipped with an operation tool for performing an operation for preventing the front side of a traveling machine body from being lifted when climbing a ridge or the like.

  A transplanter such as a riding rice transplanter in which a planting machine is connected to the rear part of a traveling machine body having a front wheel and a rear wheel is conventionally known. Such a transplanter rides on a ridge from the field and moves outside the field. In this case, there is a problem that the vehicle body becomes the rear center of gravity and the front side of the traveling machine body may be lifted.

  In order to improve the problem, the operation tool arranged on the front side of the traveling machine body is projected to the front of the traveling machine body by the attitude switching mechanism, and the posture is stood and stored along the front side of the traveling machine body. The transplanter shown in Patent Document 1 that is configured to be switchable in posture and prevents the front side of the traveling machine body from being lifted by pressing the operation tool downward has been developed and publicly known. Since the operation tool is stored on the front side of the traveling machine body when not in use, the convenience is high.

  In addition, the operation tool is configured to be switchable between a posture in which the operation tool protrudes forward of the traveling aircraft body and a posture in which the operation tool is accommodated along the front lower portion of the traveling aircraft body and protects at least a part of the front portion. The transplanter shown in Patent Document 2 that is housed in the lower front side of the traveling machine body and does not hinder the operator's field of view is also known in the art.

Japanese Patent No. 3616064 Japanese Patent No. 4174647

However, since the transplanter described in Patent Document 1 has a posture in which the operating tool is stood and stored along the front side of the traveling machine body, there is a problem that the standing operating tool hinders the operator's field of view, Since the transplanter described in Patent Document 2 has a posture of projecting forward of the traveling machine body by horizontally rotating the operating tool with respect to the traveling machine body, the position of the operating tool is low, and the operating tool is pressed downward. Therefore, there is a problem that the operation for preventing the front side of the traveling machine body from being lifted may not be performed smoothly.
The present invention solves the above-mentioned problems, and the operation tool for performing the operation for preventing the front side of the traveling machine body from being lifted at the time of climbing or the like does not hinder the operator's field of view in the posture stored in the front side of the traveling machine body, It is an object of the present invention to provide a transplanter that can easily perform an operation for preventing the front side of the traveling body from being lifted when the traveling body is projected forward.

In order to solve the above problems, the transplanter of the present invention firstly has a pair of left and right operating tools 21 arranged on the front side of the traveling machine body 3 having the front wheels 1 and the rear wheels 2, which are driven by the posture switching mechanism 20. It is configured to be switchable between a projecting posture that projects forward of the body 3 and a housing posture that is housed along the lower front side of the traveling body 3 and protects at least a part of the front portion, and the operation tool 21 is placed on the lower side. In the transplanting machine that prevents the front side of the traveling machine body 3 from being lifted by pressing, the operating tools 21 are tilted upward toward the front and the grips 24 provided on the left and right operating tools 21 are left and right. The posture switching mechanism 20 and the operation tool 21 are configured to be aligned in a straight line, and the posture switching mechanism 20 switches from the stowed posture to the projecting posture and from the projecting posture to the stowed posture by rotating the left and right operation tools. Running a rotation mechanism 22 that can be obtained, consist maintaining mechanism 23 for maintaining the projecting position of the operating member 21, the maintenance mechanism 23, a proximal end so that each operating member 21 is horizontally rotated At least a part of the posture switching mechanism 20 is supported by supporting it at the center in the left-right direction on the front side of the body 3, and the left and right operation tools 21 protrude forward and turn inward in the left-right direction, which is the side close to each other. A stopper member 31 for restricting movement by contact and a restricting member 29 for restricting rotation of the left and right operation tools 21 in the left and right directions in a state in which the rotation of the left and right operation tools 21 is restricted by the stopper member 31 are provided. It is characterized by that.

Second, in supporting the base end portion in the left-right direction central portion on the front side of the traveling machine body 3 so that each operation tool 21 rotates left and right, a rotation shaft 27 is provided at the base end portion of each operation tool 21. By tilting the pivot shaft 27 rearwardly upward in a side view and tilting outward in a frontward view upward, the left and right operation tools 21 are moved upward while approaching each other as they are turned inward in the left-right direction. The rotation mechanism 22 is configured so as to be inclined and switched to the protruding posture.

Third, a first rotation shaft 39 that rotates the operation tool 21 left and right so that the operation tool 21 is rotated inward and upward in the left-right direction and switched to a standing posture standing on the front side of the traveling machine body 3; The rotation mechanism 22 is configured by providing the second rotation shaft 37 that rotates up and down on the base end side of each operation tool 21, and the maintenance mechanism 23 is configured so that the operation tool 21 can be maintained in an upright posture. It is characterized by the construction.

Fourth, it is characterized in that a guide cam 56 which guides the contact between the retracted position and the operation member 21 side switching to projecting position from the retracted position from the projecting position.

  According to the transplanter of the present invention configured as described above, since the operating tool is stored along the front lower part of the traveling machine body in the storage posture, the operating tool is prevented from obstructing the view of the operator. On the other hand, in the case of the projecting posture, each operation tool is inclined upwards toward the front, and the grip portions provided on the left and right operation tools are arranged in parallel on the left and right. There is also an effect that the operation of pressing down and preventing the front side of the traveling machine body from being lifted becomes easier.

  In addition, when supporting the base end portion in the left-right central portion on the front side of the traveling machine body so that each operation tool rotates left and right, a rotation shaft is provided at the base end portion of each operation tool, and the rotation shaft is viewed from the side. By tilting backwards upward and tilting outwards when viewed from the front, the left and right operating tools are tilted upwards while being close to each other as they rotate inward in the left-right direction, and switched to a projecting posture. By configuring the rotation mechanism 22 as described above, the rotation from the storage position of each operation tool to the protruding position can be realized by a single shaft, which simplifies the structure and reduces the number of parts. There is an effect that can be suppressed.

  In addition, a first rotation shaft that rotates the operation tool left and right and a second rotation that rotates the operation tool up and down so that the operation tool is rotated inward and leftward in the left-right direction and switched to a standing posture standing on the front side of the traveling machine body. The rotating mechanism 22 is configured by providing a rotating shaft on the base end side of each operating tool, and the maintaining mechanism is configured so that the operating tool can be maintained in an upright position, thereby raising the front side of the traveling machine body. In the operation for preventing the above, there is an effect that it is possible to appropriately select whether the operation tool is switched to the standing posture or the protruding posture.

  Furthermore, by providing a guide cam that guides switching from the protruding position to the stored position and from the stored position to the protruding position by contact with the operating tool side, the switching operation of the operating tool can be performed more smoothly. There is.

It is the whole riding rice transplanter to which the transplanter of the present invention is applied. It is a principal part perspective view of the traveling body front side which shows the support structure of a bumper member. (A) is a perspective view of the state which switched the bumper member to the accommodation attitude | position, (B) is a perspective view of the state which switched the bumper member to the protrusion attitude | position. (A) is a front view of the state which switched the bumper member to the accommodation attitude | position, (B) is a front view of the state which switched the bumper member to the protrusion attitude | position. (A) is a side view of the state which switched the bumper member to the accommodation attitude | position, (B) is a side view of the state which switched the bumper member to the protrusion attitude | position. It is a principal part perspective view of the transplanter which shows the other examples of a posture switching mechanism. (A) is a perspective view which shows the principal part of the attitude | position switching mechanism at the time of a storing attitude | position, (B) is a perspective view which shows the principal part of the attitude | position switching mechanism at the time of a horizontal attitude, (C) is a protrusion. It is a perspective view which shows the principal part of the attitude | position switching mechanism at the time of attitude | position. (A) is a front view which shows the principal part of the attitude | position switching mechanism at the time of a storing attitude | position, (B) is a front view which shows the principal part of the attitude | position switching mechanism at the time of a horizontal attitude, (C) is a protrusion. It is a front view which shows the principal part of the attitude | position switching mechanism at the time of attitude | position. It is a back perspective view which shows the principal part of a locking mechanism. (A) is drawing which shows the structure of an attitude | position switching mechanism, and is a front view at the time of a protrusion attitude | position, (B) is a drawing which shows the structure of an attitude | position switching mechanism, and is a front view at the time of a storage attitude | position. (A) is a drawing showing the configuration of the posture switching mechanism and is a side view in the protruding posture, and (B) is a drawing showing the configuration of the posture switching mechanism and is a side view in the storage posture.

Embodiments of the present invention will be described below based on the illustrated example.
FIG. 1 is an overall side view of a riding rice transplanter to which a transplanter of the present invention is applied. The riding rice transplanter shown in the figure includes a traveling machine body 3 and a planting work machine 6 supported at the rear part of the traveling machine body 3 via a link mechanism 4 so as to be driven up and down.

  The planting work machine 6 includes a seedling platform 7 that steeply slopes upward toward the front, and a planting unit 8 disposed below the seedling platform 7. The placed seedling is scraped off by the planting unit 8 and planted in the field.

  The traveling body 3 includes a bonnet 11 that houses an engine in a front part on a body frame supported by a pair of left and right front wheels 1 and a rear wheel 2, and a control unit 12 is installed behind the hood 11 on the body frame. ing. The control unit 12 is provided with a seat 13 on which an operator is seated and a steering handle 14 disposed in front of the seat 13. A floor step 16 serving as a floor surface is provided between the seat 13 and the steering handle 14. Is formed.

  Further, on both the left and right sides of the bonnet 11, front steps 17 extending forward from the floor step 16 and having substantially the same height as the floor step 16 are formed, respectively. Each higher rear step 18 is formed. The operator or operator on the traveling machine body 3 places the seedlings passed from the front of the traveling machine body 3 on the rear seedling table 7 while moving on the front step 17, the floor step 16 and the rear step 18. To do.

  Further, a plate-like support frame 19 extending in the left-right direction along the front lower surface of the traveling machine body 3 is fixed to the front end portion of the traveling machine body 3, and the front lower portion of the traveling machine body 3 is fixed to the support frame 19. A pair of left and right rod-shaped bumper members 21 are provided.

  The pair of left and right bumper members 21 are projected by the attitude switching mechanism 20 so as to protrude obliquely upward and forward from the traveling machine body 3 and stored in a state of extending in the left and right direction along the lower front side of the traveling machine body 3. It is attached to and supported by the support frame 19 so that it can be switched between. The bumper member 21 in the stowed position is positioned close to the front side of the lower portion of the front end portion of the traveling machine body 3 and there is an obstacle or the like ahead of the traveling machine body 3 before the traveling machine body 3. The bumper member 21 in the protruding posture functions as a front press operating tool (operating tool) 21 that prevents the front side of the traveling machine body 3 from being lifted, while protecting the traveling machine body 3 by contacting an obstacle or the like.

  The riding transplanter having the above-described configuration performs the planting work in the field by driving the planting work machine 6 to drive the planting work machine 6, and ascends and descends the cocoons and the like from outside or outside the field. Move in. In that case, a case of climbing a slope such as a saddle is also assumed, but when this climbs, the traveling vehicle body becomes the rear center of gravity and the front side of the traveling vehicle body 3 is lifted by lowering the ground pressure of the front wheels 1. There is. In order to prevent the lift, the operator prevents the front side of the traveling machine body 3 from being lifted by pressing the front presser operating tool 21 in the protruding posture downward.

Next, a pair of left and right front presser operating tools will be described with reference to FIGS.
FIG. 2 is a perspective view of the main part of the front side of the traveling machine body showing the support structure of the bumper member, FIG. 3A is a perspective view of the bumper member in the storage position, and FIG. 3B is the bumper member. 4A is a front view of a state in which the bumper member is switched to the stowed posture, and FIG. 4B is a front view of the state in which the bumper member is switched to the protruding posture. FIG. 5A is a side view of a state in which the bumper member is switched to the retracted posture, and FIG. 5B is a side view of the state in which the bumper member is switched to the protruding posture.

  As shown in the figure, the posture switching mechanism 20 maintains the storage posture and the protruding posture of the bumper member by rotating the rotation mechanism 22 that rotates the bumper member from the storage posture to the protruding posture and the protruding posture to the storing posture. And a maintenance mechanism 23.

  Each of the bumper members 21 is supported by the pivot mechanism 22 at the base end portion in the left-right direction center portion of the support frame 19 (front side of the traveling machine body), and the tip end portion is the other halfway portion and the base end portion. The grip portion 24 is formed in an L shape as a whole. Incidentally, the base end portions of the left and right bumper members 21 are close to each other and are located below the front step 17 in front view.

  When each bumper member 21 is switched to the storage position, the base end portion and the midway portion thereof face in the left-right direction, and the grip portion 24 faces in the front-rear direction along the side portion of the traveling machine body 3. The front end side and the front side of the left and right sides of the traveling machine body 3 are protected by the bumper member 21 in the posture. On the other hand, when each bumper member 21 is switched to the projecting posture, the base end portion and the midway portion thereof are inclined upward toward the front and the grip portion 24 is directed in the left-right direction. More specifically, in the retracted posture, the base end portions and midway portions of the left and right bumper members 21 are arranged in a straight line on the left and right sides, while in the protruding posture, the grip portions 24 of the left and right bumper members are directly above the left and right sides. Are in parallel.

  The rotation mechanism 22 has a pair of left and right support brackets 26 which are channel-shaped members fixed in the shape of a U-shape opened toward the inside in a front view and fixed to the support frame 19 side, and the bases of the bumper members 21. A pivot shaft 27 is provided at the end and pivots integrally with the bumper member 21 so that the pivot shaft 27 can be pivoted about the axis between the upper and lower surfaces of the corresponding support brackets 26 on the left and right. By supporting the installation, as described above, each bumper member 21 is supported on the support frame 19 side so as to be turnable in the left-right direction.

  Each of the rotation shafts 27 is inclined rearwardly upward in the side view and inclined outward in the left-right direction upward in the front view, and is turned to the outermost position in the left-right direction and switched to the storage position. When each of the bumper members 21 is rotated inward in the left-right direction in order to switch to a projecting posture that is rotated to the innermost position in the left-right direction, the front end portion of each bumper member 21 is moved while the left and right bumper members 21 are close to each other. In addition, the midway portion is gradually displaced forward and upward with respect to the base end portion. In other words, by turning the bumper member 21 in the storage posture inward as described above, the bumper member 21 is inclined forward and obliquely upward and switched to the protruding posture.

  Further, the outer portion of each of the support brackets 26 is formed with a fitting portion 28 that is cut out in an arc shape with the front open, and when the bumper member is switched to the storage position, The outer periphery of the base end portion of the bumper member 21 is fitted into the fitting portion 28, and the rearward rotation of the bumper member 21 is restricted.

  It should be noted that the bumper member 21 is inclined with respect to the rotation shaft 27 and gripped with respect to the base end portion and the midway portion of the bumper member 21 so that each bumper member 21 has the above-described posture in the retracted posture and the protruding posture. The degree of bending of the portion 24 is set.

  The maintenance mechanism 23 includes a single opening prevention member (regulation member) 29 having a reverse U-shape in a front sectional view and disposed at the base end side of the left and right bumper members 21, and the base end portions of the left and right bumper members 21. A pair of left and right stopper members 31 are provided.

  The stopper member 31 is formed in a U shape by bending both end sides of a rectangular metal plate-shaped member with respect to the middle portion, and the bent ends are welded to the outer peripheral surface of the base end portion of the bumper member 21. By doing so, they are fixedly attached to the base end portions of the corresponding bumper members 21. When the respective bumper members 21 are switched to the projecting posture, the left and right stopper members 31 are in contact with each other in a planar shape, and restrict further rotation of the left and right bumper members 21 inward in the left-right direction. It is configured as follows.

  The regulating member 29 extends in the front-rear direction and has a reverse U-shape in front sectional view, and the front end portion, which is the other portion with respect to the rear end portion and the midway portion, is formed to be inclined obliquely upward and forward in a side view. While constituting the accommodating part 32, the latching | locking part 33 by which the lower end part of the middle part was notched circularly and the rear and the downward direction were processed is formed. The restricting member 29 is supported by the support frame 19 through the support shaft 34 so that the whole of the restricting member 29 can be swung up and down. It is configured such that the posture can be switched to the swinging regulated posture.

  When the right and left bumper members 21 are switched to the protruding positions and the stopper members 31 are in contact with each other, when the restriction member 29 is switched from the release position to the restricted position, the left and right bumper members 21 are placed in the housing portion 32. The outer peripheral side of the base end portion is fitted and accommodated, and the rotation of each bumper member 21 outward in the left-right direction is restricted, whereby the protruding posture of the bumper member 21 is maintained. On the other hand, when the right and left bumper members 21 are switched to the stowed posture and the base end portions of the bumper members 21 are fitted to the fitting portions 28, if the restricting member 29 is switched from the release posture to the restricting posture, the engagement of the restricting member 29 is increased. The stop 33 abuts on the front side of the outer periphery of the base end portion of the bumper member 21, and the forward rotation of the bumper member 21 is restricted, whereby the storage posture of the bumper member 21 is maintained.

  According to the left and right bumper members 21 configured as described above, the bumper member 21 functions as a bumper protected by the bumper member 21 on the left and right side front end sides and the front side of the traveling body 3, and in the protruding posture. Since the bumper tilts upward toward the front of the traveling machine body 3 and the grip portions 24 of the left and right bumper members are aligned in a straight line on the left and right, when an assistant climbs a slope such as a saddle It is easy to press the grip portion 24 downward, and an operation for preventing the front side of the traveling machine body 3 from being lifted is facilitated.

Next, based on FIG. 6 thru | or FIG. 9, a different point from the above-mentioned example is demonstrated about another Example of a transplanter.
FIG. 6 is a perspective view of the main part of the transplanter showing another example of the posture switching mechanism, and FIG. 7A is a perspective view showing the main part of the posture switching mechanism in the storage posture. ) Is a perspective view showing the main part of the posture switching mechanism in the horizontal posture, FIG. 7C is a perspective view showing the main part of the posture switching mechanism in the protruding posture, and FIG. FIG. 8B is a front view showing the main part of the posture switching mechanism in the storage posture, FIG. 8B is a front view showing the main part of the posture switching mechanism in the horizontal posture, and FIG. FIG. 9 is a front view showing the main part of the posture switching mechanism in the posture, and FIG. 9 is a rear perspective view showing the main part of the lock mechanism. In the illustrated example, when the posture switching mechanism 20 switches the posture from the stowed posture to the projecting posture and from the projecting posture to the stowed posture, the left and right bumper members 21 are in a state of projecting forward from the traveling body 3 in the horizontal direction. It is the composition via. In other words, the bumper member 21 in a state where the horizontal posture is switched to the protruding posture described above is switched to a horizontal posture extending forward in the horizontal direction when viewed from the side by swinging downward.

  Therefore, the rotation mechanism 22 of the posture switching mechanism 20 is supported by a base member 36 fixed to the center in the left-right direction of the support frame 19 by welding or the like, and is rotatably supported by the base member 36 about its own axis. A vertical pivot shaft (second pivot shaft) 37 in the left-right direction, a movable bracket 38 extending forward from the vertical pivot shaft 37 and pivoting up and down integrally with the vertical pivot shaft 37, and The movable bracket 38 is provided with a pair of left and right rotating shafts (first rotating shafts) 39 that respectively support the base end sides of the left and right bumper members 21.

  The movable bracket 38 is a channel-shaped member having a U-shape with the front viewed from the side opened, and a pair of left and right extending between the upper and lower surfaces of the movable bracket 38 in a direction perpendicular to the vertical rotation shaft 37. The left and right stoppers disposed on the base end side of the bumper member 21 so that the bumper member 21 can be rotated left and right around the axis of the left and right rotation shaft 39. The member 31 is supported on the corresponding left and right rotation shaft 39.

  That is, the bumper member 21 is supported on the front side of the traveling machine body 3 so as to be rotatable up and down by the vertical rotation shaft 37, and is supported on the front side of the traveling machine body 3 so as to be able to rotate left and right by the left and right rotation shaft 39. The bumper member 21 is rotated downward to the lowermost position and rotated to the outermost position in the left-right direction, thereby switching to the above-described storage posture, and the bumper member 21 is rotated downward to the lowermost position and in the left-right direction. By turning to the innermost position, the left and right stopper members 31 come into contact with each other to switch to the above-described horizontal posture, and by turning the bumper member 21 upward by a predetermined amount from the horizontal posture, the above-described protruding posture is switched.

  The maintenance mechanism 23 of the posture switching mechanism 20 includes the base member 36 and the stopper member 31 described above, and a lock mechanism 41 that locks the vertical rotation shaft 37 (bumper member) at a predetermined vertical rotation angle. .

  The base member 36 is formed in a channel shape extending in the front-rear direction in which the front half 40 protruding forward from the support frame 19 forms a reverse U-shape when viewed from the front, and the channel-shaped left and right wall portions are rearward so that they are parallel to each other. It is integrally extended to the side and constitutes the latter half. The front half 40 of the base member 36 is configured to restrict the vertical and horizontal rotation of the bumper member 21 within a predetermined range, and the above-described vertical rotation shaft 37 and the lock mechanism 41 are provided at the rear end. ing.

  First, the configuration of the front half portion 40 of the base member 36 will be described. The channel-like front half portion 40 is configured such that the proximal end sides of the left and right bumper members 21 in a state where the stopper members 31 are in contact with each other on the inner surface side. It is configured to be able to be accommodated in a fitting state in which movement is permitted, and the left and right wall portions of the front end portion are horizontally arranged with the left and right rotation shafts 39 of the left and right bumpers as fulcrums when switched to the horizontal posture. A notch-shaped fitting portion 42 that allows rotation is cut out in a state where the front is opened.

  Then, the stopper members 31 of the left and right bumper members 21 switched to the horizontal posture are fitted and inserted into the corresponding fitting portions 42 so that the stopper member 31 is positioned in the storage posture. That is, when switching from the stowed posture to the protruding posture and from the protruding posture to the stowed posture, the bumper member 21 is always switched once to the horizontal posture. In addition to this, when the bumper member 21 is switched to the protruding posture, the stopper member 31 comes into contact with the ceiling side of the channel-shaped front half 40, and further upward rotation of the bumper member 21 is restricted. .

  Subsequently, the configuration of the rear end portion of the base member 36 will be described. The extended side wall portion 43 that is one side of the parallel left and right wall portions (the left side in the example shown in the drawing) is such that the extended end side faces forward. An intermediate wall 44 is formed that is bent in a U-shape and arranged in parallel between the rear portions of the left and right wall portions, and is positioned in front of the intermediate wall 44 between the left and right wall portions. The above-described vertical rotation shaft 37 is installed and supported so as to be rotatable around the axis.

  In addition, a locking rod 48 is inserted into and supported by the extended side wall 43 and the intermediate wall 44 so as to be slidable to the left and right, and a non-extending side wall 46, which is a wall opposite to the extended side wall 43. The left and right slides are provided with insertion holes 47 through which the locking rods 48 are detachably inserted, and the portions of the locking rods 48 that protrude outward from the wall portions on the extending side are bent backward. A gripping portion 49 is formed, and a compression spring 50 as an elastic member is externally attached to the locking rod 48, and the locking rod 48 is constantly urged toward the side through which the insertion hole 47 is inserted by the compression spring 50.

  On the other hand, on the vertical rotation shaft 37, a plate-shaped locking piece 51 that rotates up and down integrally with the vertical rotation shaft 37 in a state of being positioned between the non-extending side wall portion 46 and the intermediate wall 44 is provided on the rear side. The locking piece 51 has a plurality of locking holes 52 through which the locking rod 48 can be inserted.

  Then, by inserting the locking rod 48 into any of the plurality of locking holes 52, the vertical rotation of each bumper member 21 is locked, while being locked against the elastic force of the compression spring 50. By sliding the rod 48 to the side extracted from the insertion hole 47 and the locking hole 52 described above, the vertical rotation lock of each bumper member 21 is released. In the example shown in the figure, two locking holes 52 are provided on the upper and lower sides. When the locking rod 48 is inserted into the locking hole 52 on one side, the bumper is in the vertical rotation position in the horizontal position and in the storage position. When the vertical rotation of the member 21 is locked and the locking rod 48 is inserted into the locking hole 52 on the other side, the vertical rotation of the bumper member is locked at the vertical rotation position in the protruding posture. Incidentally, the locking holes 52 need to be drilled along the arc passing through the locking rod 48 around the axis of the vertical rotation shaft in the side view from the above-described configuration. The vertical rotation angle of the member 21 may be adjusted in a plurality of stages. The locking mechanism 41 is configured by the locking rod 48, the locking piece 52, the left and right wall portions 43 and 46, the intermediate wall 44, and the compression spring 50.

  The base member 36 may have a notch on the ceiling side of the channel-shaped front half of the base member 36. With this configuration, the left and right bumper members 21 can be pivoted from a projecting posture in which the left and right bumper members 21 protrude upward to the front side of the traveling machine body 3 to be in a standing state. When the stopper member 31 provided at the base end portion 21 is fitted to the left and right portions 21, the left and right movements are restricted. In this configuration, the locking piece 51 of the lock operation portion 41 is provided with a locking hole 47 at a position where the locking rod 48 can be inserted in the standing posture.

Next, based on FIG.10 and FIG.11, a different point from the above-mentioned example is demonstrated about another Example of this invention.
10A and 10B are diagrams showing the configuration of the posture switching mechanism, wherein FIG. 10A is a front view in a protruding posture, FIG. 10B is a front view in a storage posture, and FIG. It is drawing which shows a structure, Comprising: (A) is a side view at the time of a protrusion attitude | position, (B) is a side view at the time of a storage attitude | position. In the illustrated example, the second rotating shaft 37 is supported by the base member 36 and the first rotating shaft 39 is supported by the second rotating shaft via the movable bracket 38 as in the examples shown in FIGS. The base member 36 has a structure in which the channel-shaped front half 40 and the lock mechanism 41 are omitted from the base member shown in FIGS. It is comprised by the guide cam 56 arrange | positioned ahead, and the left-right paired accommodation attitude | position maintenance part 59. FIG.

  The guide cam 56 has a mountain shape when viewed from the front so as to rise from the left and right sides toward the central portion, and has a concave fitting portion 58 formed at the top of the mountain shape. It is attached and fixed to the support frame 19 located on the front side by welding or the like. Incidentally, when the base end portions of both the left and right bumper members 21 are fitted into the fitting portions 58, the respective bumper members 21 are restricted from rotating in the left-right direction and downwardly rotated by the fitting, In addition to being restricted from turning inward in the left-right direction by the contact between the left and right stopper members 21, the bumper member 21 is restricted from turning upward by its own weight or a weight 61 described later, and is positioned in the storage posture.

  Further, when the bumper member 21 is switched from the stowed posture to the protruding posture, if the left and right pivot shaft 39 is pivoted inward in the left and right direction, the base end side of the bumper member 21 comes into contact with the inclined portion 57 and the vertical pivot shaft. Since the upper 37 is pivoted around the fulcrum 37, the posture can be switched smoothly. Incidentally, the bumper member 21 and the inclined portion 57 are reliably brought into contact with each other by the weight of the bumper member 21 or a weight 61 described later.

  The storage posture maintaining unit 59 includes a holder 62 fixed to each of the left and right sides of the support frame 19, and a holder 63 attached and fixed to the distal ends of the left and right bumper members 21. The left and right bumper members 21 are maintained in the stowed position by engaging the respective holders 63 corresponding to the holders 62 detachably.

  Further, the weight 61 described above is attached and fixed to the left and right bumper members 21 via the holder 63. That is, the holder 63 also functions as an attachment member for attaching and fixing the weight 61. Specifically, the attachment member forms a rod-like member in an L shape and both ends of the L shape are bumper members 21. A square plate-like weight 61 is fitted into a portion surrounded by the attachment member and the bumper member 21 so as to be surrounded by a peripheral edge. It is fixed.

  For this reason, the holder 62 is formed of a C-shaped member that is elastically deformable so that the outer periphery on the front end side of the holder 63 that is a rod-shaped attachment member is detachably fitted. The bumper member 21 is positioned in the storage posture by engaging and storing the outer periphery of the base end side of the rod-shaped held tool 63 in the tool 62 so as to be freely disengaged.

  According to the above configuration, when the bumper member 21 is switched to the projecting posture, the left and right weights 61 act so as to suppress the front side lift of the traveling machine body 3, and the operating tool is moved downward. The pressing operation can be performed more easily.

DESCRIPTION OF SYMBOLS 1 Front wheel 2 Rear wheel 3 Traveling machine body 20 Posture switching mechanism 21 Bumper member (operating tool)
22 Rotating mechanism 23 Maintenance mechanism 27 Rotating shaft 29 Opening prevention member (regulating member)
31 Stopper member 37 Vertical rotation axis (second rotation axis)
39 Left and right pivot (first pivot)
56 Guide cam

Claims (4)

A pair of left and right operating tools (21) arranged on the front side of the traveling machine body (3) having the front wheels (1) and the rear wheels (2) are moved forward of the traveling machine body (3) by the posture switching mechanism (20). The projecting posture is configured to be switchable between a projecting posture that protrudes and a housing posture that is housed along the lower front side of the traveling body (3) and protects at least a part of the front portion, and the operating tool (21) is moved downward. In the transplanter that prevents the front side of the traveling machine body (3) from being lifted by pressing, each operating tool (21) is inclined upward and forward and provided on the left and right operating tools (21). The posture switching mechanism (20) and the operation tool (21) are configured so that the gripping part (24) is aligned in a straight line on the left and right, and the posture switching mechanism (20) rotates the left and right operation tools. From the stowed position to the protruding position and from the protruding position Capable turning mechanism to switch to pay posture and (22), is configured from an operation device maintaining mechanism for maintaining the projecting position of (21) (23), said maintaining mechanism (23), each operating member (21 ) Is supported to the left and right central portion on the front side of the traveling machine body (3) so as to rotate left and right to constitute at least a part of the posture switching mechanism (20), and the left and right operation tools (21) A stopper member (31) that restricts the rotation more than a predetermined amount inward in the left-right direction, which is a side close to each other while protruding forward, and a state in which the rotation inward is restricted by the stopper member (31). A transplanter provided with a regulating member (29) that regulates rotation of the left and right operation tools (21) outward in the left-right direction. In supporting the base end portion in the left-right direction central portion on the front side of the traveling machine body (3) so that each operation tool (21) rotates left and right, a rotation shaft (27) is provided at the base end portion of each operation tool (21). And the left and right operation tools (21) are pivoted inward in the left-right direction by tilting the pivot shaft (27) rearwardly upward in the side view and tilting outward in the upper direction of the front view. The transplanter according to claim 1 , wherein the rotation mechanism (22) is configured so as to be tilted upward while being close to each other and switched to a projecting posture. A first pivot shaft (21) that rotates the operating tool (21) left and right so that the operating tool (21) is rotated inward and upward in the left-right direction and switched to a standing posture that stands on the front side of the traveling machine body (3). 39) and a second rotation shaft (37) that rotates up and down are provided on the base end side of each operation tool (21) to constitute the rotation mechanism (22), and the operation tool (21) The transplanter according to claim 1 , wherein the maintenance mechanism (23) is configured to be maintained in a standing posture. The transplanter according to claim 3 , further comprising a guide cam (56) for guiding the switching from the protruding position to the storing position and from the storing position to the protruding position by contact with the operation tool (21).

Images