JP2007185124A - Foldable agricultural implement - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent the generation of noise by the rotation of a second extending leveling plate and the damage of the second extending leveling plate when an extensible working member is in folded posture. <P>SOLUTION: The foldable agricultural implement 1 is provided with an implement body 10 having a tilling member to perform the tilling work and the first leveling plate 15 and the second leveling plate 16 positioned at the back of the tilling member in a vertically tiltable manner to perform the leveling work, and an extensible working member 31 attached to the lateral edge of the implement body in a foldable and rotatable state and having an extensible tilling member to increase the working width of the tilling member and a first extending leveling plate 32 and a second extending leveling plate 33 positioned at the back of the tilling member in a vertically tiltable manner. The second extending leveling plate 33 is provided with a rotation restricting means 70 having a rotation restricting shaft 73 attached to a side end of the leveling plate, integrated with a connection shaft 72 to connect and disconnect the second extending leveling plate 33 and the second leveling plate 16 interlocked with the rotation of the extensible working member 30 and restrict the rotation of the second extending leveling plate 33 when the extensible working member 30 is in a folded posture. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a folding farm machine that can fold an extension work body.

  As shown in FIG. 10 (perspective view), such a folding farm work machine 81 includes a cultivating body that performs the cultivating work and a first leveling plate that is positioned so as to be pivotable in the vertical direction at the rearward position. (Apron in the literature) 15 and a work implement body 10 having a second leveling plate (leveled plate in the literature) 16 that is positioned so as to be pivotable in the vertical direction behind the first leveling plate 15 and the leveling work. An extension tiller that is provided at the outer end in the width direction of the machine main body 10 so as to be foldable and freely rotatable, and extends to the work width of the tiller body, and is positioned so as to be vertically rotatable at the rear position. A first extended leveling plate (apron in the literature) 32 to be performed and a second extended leveling plate (leveled plate in the literature) 33 for performing leveling work in a position that is pivotable in the vertical direction behind the first extended leveling plate 32. Extension work body (right work machine part in the literature, left Those with work machine portion) 30 is known (see Patent Document 1).

  In the folding farm work machine 81, when the extension work body 30 is in the folded position, the extension work body 30 is rotated by approximately 180 ° from the deployed position, and the back surface of the extension work body 30 and the back surface of the work machine body 10 are overlapped. In this way, the work machine main body 10 is stored at an upper position.

JP 2003-304707 A

  In such a conventional folding farming machine, when the extension work body is in the folded position, the second extension leveling plate is free to rotate with respect to the first extension leveling plate, and the second extension leveling plate has a tip at the bottom. It becomes the posture which turned to the other side. In this state, when the farm implement advances through the field, the second extended leveling board rotates to the front and rear in the direction of travel of the farm work machine and collides with the first leveling board etc. of the work implement body to generate noise. Or a problem that they may be damaged occurs.

  The present invention has been made in view of such problems, and when the extension work body is folded, noise is generated by the rotation of the second extension leveling plate or the second extension leveling plate is damaged. It is an object of the present invention to provide a folding farm machine that can prevent a situation in which a farming machine is installed.

  In order to achieve the above object, a folding farm machine according to the present invention includes a tilling body that performs tilling work, a first leveling board that performs a leveling work while being pivotable in a vertical direction at a rear position of the tilling body, and the first leveling board. 1. A work machine body having a second leveling plate for performing leveling work in a position that can be rotated in the vertical direction at a rear position of the leveling board, and a foldable and rotatably provided at an end in the width direction of the work machine body A first extended leveling plate that extends in the vertical direction at a rear position of the extended tillage body and performs leveling work, and a rear side of the first extended leveling plate. In a folding agricultural work machine having an extension work body having a second extension leveling plate that is positioned so as to be pivotable in a vertical direction at the position, the second extension leveling plate is interlocked with the rotation of the extension work body And the second leveling plate are connected and disconnected, and the extension work body is When it is in the folded position, it is locked to the first extension leveling plate to restrict the rotation of the second extension leveling plate, and when the extension work body is set to the deployed position, the lock with the first extension leveling plate is released and the second extension is extended. There is provided a rotation restricting means (for example, the second rotation restricting means 70 in the embodiment) for releasing the restriction of the leveling plate.

  According to the present invention, the second extension leveling plate and the second leveling plate are connected and released in conjunction with the rotation of the extension work body, and are locked to the first extension leveling board when the extension work body is in the folded position. When the extension work body is in the deployed posture by restricting the rotation of the second extension leveling plate, the rotation restriction means for releasing the rotation restriction of the second extension leveling plate is released from the locking with the first extension leveling plate. When the extended working body is in the folded posture, the rotation of the second extension leveling plate is restricted by the rotation restricting means. For this reason, it is possible to reliably prevent the second extended leveling body from rotating and colliding with the work machine main body, and noise is generated by the collision of the second extended leveling body or the second extended leveling body is damaged. Can be prevented in advance.

  Further, the rotation restricting means of the present invention is provided at the second leveling plate side end portion of the second extension leveling plate and connects the second extension leveling plate and the second leveling plate in conjunction with the rotation of the extension work body. Provided integrally with the connecting shaft portion to be disconnected, and when the extended work body is in the folded position, it is locked to the first extension leveling plate to restrict the rotation of the second extension leveling plate, and the extension work body is set in the deployed position. It is characterized by having a rotation restricting shaft part that releases the restriction of the rotation of the second extension leveling plate when unlocked from the first extension leveling plate.

  According to this invention, the rotation restricting means is provided integrally with the connecting shaft portion that is interlocked with the rotation of the extension work body, and restricts the rotation of the second extension leveling plate when the extension work body is in the folded posture. When the extension work body is set to the deployed posture, the rotation restriction shaft portion that releases the rotation restriction of the second extension leveling plate is provided, so that the rotation restriction shaft portion is provided integrally with the existing connection shaft portion. An increase in the number of parts of the movement restricting means can be suppressed, and an increase in the cost of the folding farm work machine can be suppressed.

  Further, the rotation restricting means of the present invention includes a shaft main body portion supported on the second leveling plate side end portion of the second extension leveling plate so as to be movable in the width direction of the second extension leveling plate, A connecting shaft portion and a rotation restricting shaft portion integrally provided on the second leveling plate side, and biasing means for biasing the shaft main body portion toward the second leveling plate side (for example, the biasing spring 74 in the embodiment) And a rotation regulating shaft portion provided at a tip portion of a side plate portion (for example, the side plate portion 32a in the embodiment) extending from the first leveling plate side end portion of the first extension leveling plate to the second extension leveling plate side. A locking recess for stopping and restricting the rotation of the second extension leveling plate, and a second extension leveling plate provided at the second extension leveling plate side end of the second leveling plate and fitted to the connecting shaft portion. It has a fixed hole part which connects a 2nd leveling board integrally, It is characterized by the above-mentioned.

  According to this invention, the rotation restricting means uses the existing connecting shaft portion by having the shaft main body portion, the connecting shaft portion, the rotation restricting shaft portion, the urging means, the locking recess portion, and the fixing hole portion. Thus, when the extension work body is in the folded posture, the rotation of the second extension leveling plate can be restricted, and the cost increase of the farm work machine can be suppressed.

  Moreover, the latching recessed part of this invention has the 1st latching surface and 2nd latching surface which contact | abut to the rotation direction one side edge part and other side edge part of the 2nd extension leveling board in a rotation control axial part. It is characterized by.

  According to this invention, since the locking recess has the first locking surface and the second locking surface, the movement of the rotation restricting shaft portion is stopped with a simple structure and the rotation of the second extension leveling plate is ensured. Can be regulated. For this reason, the cost increase of an agricultural machine can be suppressed more.

  Further, the connecting shaft portion of the rotation restricting means according to the present invention has a side plate portion provided with the fixing hole portion above the fixing hole portion when the extension work body rotates to the deployment posture side and moves to a position immediately before the deployment posture. It is characterized by abutting on.

  According to the present invention, when the extension working body rotates to the deployment posture side and moves to the position immediately before the deployment posture, the connecting shaft portion moves the fixed hole portion above the fixed hole portion. When the extended working body further rotates from the position immediately before the deployment posture to the deployment posture side by contacting the provided side plate portion, the distal end portion of the connecting shaft portion moves to the fixed hole side while contacting the side plate portion, When the extended working body is in the deployed posture, the connecting shaft portion is inserted into the fixed hole portion by the urging force of the urging means. The present invention is configured such that the connecting shaft portion comes into contact with the side plate portion at a position immediately before the deployed posture, but when the extended working body is in the deployed posture, the connecting shaft portion is directly inserted into the fixed hole portion. This is a natural idea. In addition, the extension work body and the work machine main body have a structure extending in the axial direction and are easily bent due to their own weight, and there is a possibility that the relative positions of the connecting shaft part and the fixing hole part may be shifted. The rigidity of the body and work machine body can also be strengthened. However, if it does in this way, the problem that a farm work machine's own weight will increase and cost will arise. Therefore, there is a need for a structure in which the connecting shaft portion can be inserted into the fixed hole portion without increasing the rigidity of the extension work body or work implement main body. An invention has been developed in which the tip of the shaft portion contacts the side plate portion above the fixed hole portion. For this reason, compared with the case where the connecting shaft portion is directly inserted into the fixed hole when the extension work body is in the deployed posture, the present invention does not increase the rigidity of the extension work body or the work machine body. The allowable range of the assembly accuracy of the extension work body and the attachment accuracy of the connecting shaft portion can be increased, and the cost increase of the farm work machine can be further suppressed.

  The second extended leveling board of the present invention is characterized in that when the extended work body is in a folded posture, the tip is directed downward while the rotation is restricted by the rotation restricting means.

  According to the present invention, when the extended working body is in the folded posture, the second extended leveling plate is in a posture in which the tip is directed downward in a state in which the extended working body is folded, so that the front and rear direction with respect to the traveling direction of the folding farm work machine Can be shortened, and the moving operation of the agricultural machine can be facilitated when the agricultural machine moves in a field or the like. Moreover, since the front-end | tip part of a 2nd extension leveling board can be turned below, the possibility that the front-end | tip part of a 2nd extension leveling board may contact an obstruction etc. can be suppressed.

  Further, the rotation restricting means of the present invention includes a shaft main body portion supported on the second leveling plate side end portion of the second extension leveling plate so as to be movable in the width direction of the second extension leveling plate, A connecting shaft portion and a rotation restricting shaft portion provided integrally on the second leveling plate side, biasing means for biasing the shaft main body portion toward the second leveling plate side, and a first leveling of the first extension leveling plate. A first lock that is provided at the tip of the side plate extending from the main plate side end to the second extended leveling plate and that contacts the rotation restricting shaft and restricts the rotation of one side of the second extended leveling plate. A second locking surface that is provided on the base side of the surface and the side plate portion and abuts against the second leveling plate side end portion of the second extension leveling plate to restrict the rotation of the other side of the second extension leveling plate; A fixed hole portion that is provided at an end portion of the second leveling plate on the second extension leveling plate side and is fitted to the connecting shaft portion so as to integrally connect the second extension leveling plate and the second leveling plate. And

  According to this invention, the rotation restricting means includes the shaft main body portion, the connecting shaft portion, the rotation restricting shaft portion, the urging means, the first locking surface, the second locking surface, and the fixing hole portion. Thus, when the extension work body is folded, the rotation of the second extension leveling plate on one side is restricted by the second extension leveling plate coming into contact with the first locking surface, and the rotation restriction shaft portion is By abutting on the second locking surface, the rotation of the other side of the second extension leveling plate is restricted, and the rotation of the second extension leveling plate can be restricted. For this reason, it is possible to reliably prevent the extended leveling body from rotating and colliding with the work implement main body, etc., and the situation that the extended leveling body may cause noise or damage the extended leveling body or the like. It can be prevented in advance. Further, by providing the first locking surface at the distal end portion of the side plate portion and providing the second locking surface on the base side of the side plate portion, it is possible to disperse the force received to restrict the rotation of the second extended leveling plate. The rigidity of the portion having the first locking surface and the second locking surface that receives this force can be suppressed.

  According to the folding agricultural work machine according to the present invention, the second extension leveling plate and the second leveling plate are connected and disconnected in conjunction with the rotation of the extension work body, and the extension work body is set to the folding posture to be the first extension. When it is locked to the leveling plate and the rotation of the second extension leveling plate is restricted and the extension work body is set to the deployed position, the lock with the first extension leveling plate is released and the rotation restriction of the second extension leveling plate is released. When the extension work body is in a folded posture by providing the rotation restricting means, the folding farm machine does not cause a noise or damage to the second extension leveling board due to the rotation of the second extension leveling board. Can be provided.

  Hereinafter, preferred embodiments of the folding agricultural work machine of the present invention will be described with reference to FIGS. The present embodiment will be described below by taking an example of a folding farm work machine as a substitute among the folding farm work machines. For convenience of explanation, the following description will be made with the directions of arrows shown in FIG. 1 (plan view) as the front-rear direction and the left-right direction.

  As shown in FIG. 1, the folding farm work machine 1 is attached to the rear part of the traveling machine body 90 and advances along with the traveling of the traveling machine body 90 to perform a substitute work. A main body 10, an extension working body 30 attached to both left and right ends of the extension work body so as to be rotatable in the vertical direction, and an auxiliary leveling body attached to an outer end portion of the extension work body 30 in the horizontal direction so as to be rotatable in the vertical direction. 50, and the working machine body 10 and the extension work bodies 30 and 30 form a three-part structure.

  The front part of the work machine body 10 is provided with a connecting part connected to a three-point link connecting mechanism provided at the rear part of the traveling machine body 90, and the folding agricultural work machine 1 is connected to the connecting part so as to be moved up and down by this connecting part. Is done. A gear box 12 is provided at the front portion of the work machine body 10 so that power from the PTO shaft of the traveling machine body 90 is transmitted to the gear box 12 through power transmission means such as a universal joint.

  The work machine main body 10 has a tillage body (not shown) such as a rotary that performs tillage work, and the top of the tillage body is covered with a machine frame 13 that also serves as a cover body. A substantially plate-shaped leveling body 14 is provided at the rear end of the machine frame 13 so as to be pivotable in the vertical direction at the rear position of the tillage body and perform leveling work.

  The leveling body 14 includes a first leveling plate 15 having a substantially plate shape whose front end portion is pivotally connected to the rear end portion of the machine frame 13 and rotatable in the vertical direction, and a front end portion at the rear end portion of the first leveling plate 15. And a substantially plate-like second leveling plate 16 that can be pivoted in the vertical direction.

  The extension work bodies 30 disposed on the left and right sides have a symmetrical structure, and an extension tillage body (not shown) such as a rotary that extends the work width of the tillage body of the work machine body 10 to the side, and an extension tillage. An extended leveling body 31 that is positioned so as to be pivotable in the vertical direction at a rear position of the body and performs leveling work. The upper side of the extended tillage body is covered with an extension machine frame 35 that also serves as a cover body.

  The extended leveling body 31 is a substantially plate-like member that is attached to the rear end portion of the extension machine frame 35 so as to be rotatable in the vertical direction and performs leveling work. The extended leveling body 31 is joined to and connected to the outer end of the leveling body 14 when the extension work body 30 is deployed, and is separated from the outer end of the leveling body 14 when the extended leveling body 31 is folded. Thus, the joint with the leveling body 14 is released.

  The extended leveling body 31 includes a first extended leveling plate 32 having a substantially plate shape whose front end is pivotally connected to the rear end of the extension machine frame 35 and rotatable in the vertical direction, and the rear end of the first extended leveling plate 32. It has a substantially plate-like second extended leveling plate 33 that is pivotable in the vertical direction with the front end portion pivotally connected to the portion.

  Further, an auxiliary leveling body 50 attached to the outer end portion of the second extension leveling plate 33 of the extended leveling body 31 so as to be rotatable in the vertical direction is provided. The auxiliary leveling body 50 can be rotated about a pivot shaft 34 provided at the outer end portion on the front side of the second extension leveling plate 33, and the second leveling plate 33 can be rotated in the deployed state. Extending outward and assisting in leveling work of the second extension leveling plate 33, and when folded (not in use), folded to the surface side of the second extension leveling plate 33 and overlapped with the second extension leveling plate 33; Become.

  The work machine body 10 and the extended work body 30 thus configured are provided with first rotation restricting means 60. The first rotation restricting means 60 includes a fixed rod 61 attached to the inner end portion of the first extension leveling plate 32 so as to be movable in the left-right direction, and a fixed rod provided at the outer end portion of the first leveling plate 15. 61 and an engaging portion (not shown) arranged opposite to each other. The fixed rod 61 is urged inward in the axial direction by the compression spring 62, and when the extension work body 30 is in a deployed state, the fixed rod 61 comes into contact with the locking portion to connect the two leveling plates (15, 32). When in the folded state, the distal end portion of the fixed rod 61 is disengaged from the locking portion, so that the connected state of the two leveling plates (15, 32) is released.

  Further, as shown in FIG. 2 (perspective view), the second extension leveling plate 33 and the second extension leveling plate 16 are interlocked with the rotation of the extension work body 31, as shown in FIG. A second rotation restricting means 70 for restricting the rotation of the second extension leveling plate 33 with respect to the first extension leveling plate 32 is provided while connecting and releasing the connection 33. The second rotation restricting means 70 includes a shaft main body 71 supported on the inner end of the second extension leveling plate 33 on the front side so as to be movable in the left-right direction, and on the second leveling plate side of the shaft main body 71. The connecting shaft portion 72 and the rotation restricting shaft portion 73 that are integrally provided, the biasing spring 74 that biases the shaft main body portion 71 toward the second leveling plate, and the first leveling plate of the first extension leveling plate 32. A locking recess 75 that is provided at a distal end portion of the side plate portion 32a extending from the side end portion toward the second extension leveling plate and that locks the rotation restriction shaft portion 73 to restrict the rotation of the second extension leveling plate 33; The fixing hole 76 is provided at the second extended leveling plate side end of the second leveling plate 16 and is fitted to the connecting shaft portion 72 to integrally connect the second extended leveling plate 33 and the second leveling plate 16. It has.

  The connecting shaft portion 72 extends from the shaft main body portion 71 toward the second leveling plate 16 side. The rotation restricting shaft portion 73 extends from the tip end portion of the shaft main body portion 71 toward the second leveling plate 16 side along the connecting shaft portion 72 toward the second leveling plate 16 side. The connecting shaft portion 72 is integrally attached to the shaft main body portion 71 by welding or the like.

  As shown in FIG. 3B (partial cross-sectional view), the locking recess 75 rotates at the upper end of the side plate portion 32a with the rotation center O of the second extended leveling plate 33 as a rotation fulcrum. It is provided in the movement locus of the rotation restricting shaft portion 73. The locking recess 75 is formed in a substantially U shape, and a first locking surface 75a that contacts the one end and the other end in the rotation direction of the second extension leveling plate 33 in the rotation restricting shaft 73. And a second locking surface 75b. The first locking surface 75a and the second locking surface 75b are arranged to face each other, and the distance between the locking surfaces is slightly larger than the diameter of the rotation restricting shaft portion 73, so that the rotation into the locking recess 75 is achieved. The restriction shaft 73 is easily inserted. As described above, when the rotation restricting shaft portion 73 is inserted into the locking recess 75, the rotation restricting shaft portion 73 comes into contact with the first locking surface 75a and the second locking surface 75b so as to be perpendicular to the axis. The movement of the direction is restricted, and the rotation of the second extension leveling plate 33 relative to the first extension leveling plate 32 can be restricted.

  The fixed hole portion 76 is an upper portion of the side plate portion 16a extending from the end portion of the second leveling plate 16 on the second extension leveling plate side to the front side of the second leveling plate 16, and is the rotation center O of the second extension leveling plate 33. Is provided in the movement trajectory of the connecting shaft portion 72 that rotates about the rotation fulcrum. The fixed hole portion 76 is formed in a long hole shape. The length of the fixing hole portion 76 in the short direction has such a size that the connecting shaft portion 72 can be inserted and removed. For this reason, when the connecting shaft portion 72 is fitted to the fixed hole portion 76, the second leveling plate 16 and the second extended leveling plate 33 are connected, and the second extended leveling plate 33 is connected to the second leveling plate 16. Can be positioned.

  Further, as shown in FIG. 4 (partial sectional view), the fixing hole 76 is in a state in which the rotation restricting shaft portion 73 is inserted into the locking recess 75 and the rotation of the second extended leveling plate 33 is restricted. When the extension work body 30 rotates to the deployment posture side and moves to a position immediately before the deployment posture, the distal end portion of the connecting shaft portion 72 is disposed at a position where it contacts the side plate portion 16a above the fixed hole portion 76. . For this reason, when the extension working body 30 is further rotated from the position immediately before the deployment posture to the deployment posture side, first, the distal end portion of the connection shaft portion 72 abuts on the side plate portion 16a, so that the connection shaft portion 72 is slightly moved to the second position. It moves outward in the width direction of the extended leveling plate 33. At the same time, the rotation restricting shaft 73 integrally formed with the connecting shaft 72 is released from the locking recess 75, and the rotation restriction of the second extended leveling plate 33 is released. Is turned downward with the pivot as a pivot. Soon, the connecting shaft portion 72 that is urged toward the second leveling plate 16 and slides on the side plate portion 16a is inserted into the fixing hole 76, and the second extended leveling plate 33 and the second leveling plate 16 are connected. The

  As shown in FIG. 1, when the extended working body 30 is deployed and the second leveling plate 16 and the second extended leveling plate 33 are connected, the second leveling plate 16 and the second leveling plate 16 which are connected and integrated with each other. The extended leveling plate 33 is supported via switching means 20 provided at the center of the machine casing 13 of the work machine body 10, and the leveling plates (16, 33) are placed in the normal working posture by the switching means 20. It is possible to switch to the earth work position.

  As shown in FIG. 3A (side view), the normal work posture is such that the second leveling plate 16 and the second extended leveling plate 33 that are connected to each other are integrated in the vertical direction according to the unevenness of the field. This is a rotatable scraping work posture, and in this alternative scraping work posture, the second leveling plate 16 and the second extended leveling plate 33 are substantially in a horizontal plane. Further, as shown by a two-dot chain line in FIG. 3A, the earthing work posture is fixed after the second leveling plate 16 and the second extension leveling plate 33 that are connected and integrated with each other are rotated downward. This is a working posture that can regulate the upward rotation and perform soiling and the like of the scraped soil. The selection of these work postures can be performed by an operator who is on the traveling machine body 90 shown in FIG.

  Next, the operation of the folding farm work machine 1 will be described.

  First, as shown in FIG. 1, in the case of performing the cutting work with the maximum working width, the extension working bodies 30 on both the left and right sides are deployed, the auxiliary leveling bodies 50 on both the left and right sides are in the deployed posture, and the second leveling work is performed. The main plate 16 is brought into a normal working posture. Then, the entire farm work machine is lowered to a desired position by the three-point link coupling mechanism, and the substitute work is performed. Although details will be described later, when the extended working body 30 is set to the deployed posture, the second extended leveling plate 33 and the second leveling plate 16 are connected and integrated.

  Further, when working with only the central work machine body 10 or when working with the central work machine body 10 and either the left or right extension work body 30, as shown in FIG. 5 (side view), The extension work body 30 needs to be in a folded posture. 5 shows a side view of the state in which the folding farm work machine 1 in which the extension work body 30 is folded is installed on the caster stand 80. FIG.

  In these cases, first, the auxiliary leveling body 50 is folded (unused), and then the extension working body 30 in the unfolded position is rotated to the folding side. When the extension work body 30 rotates, the connecting shaft portion 72 is removed from the fixed hole portion 76, and the connected state of the two leveling plates (16, 33) is released.

  When the connected state of the two leveling boards (16, 33) is released, the second extension leveling board 33 rotates about the rotation center O by its own weight, as shown in FIGS. 3B and 6 (rear view). It turns downward as a fulcrum, and the base of the second extension leveling plate 33 comes into contact with the movement restricting member 36 provided on the side plate part 32a of the first extension leveling plate 32 so that the rotation is restricted and the posture is directed downward. Become. Then, when the extension work body 30 is rotated to the folding side (upper side), the rotation restricting shaft portion 73 moves to the locking recess 75 side while the tip end portion abuts against the side plate portion 32a and is moved to the locking recess 75. The second extended leveling plate 33 enters the locked state and is in a state where the rotation is restricted. Then, when the extension work body 30 is further turned to the folding posture side in a state where the rotation of the second extension leveling plate 33 is restricted, as shown in FIG. 5, the extension work body 30 assumes the folding posture, The 2 extension leveling board 33 will be in the attitude | position in which the front-end | tip faced downward.

  As described above, when the extended working body 30 is in the folded posture, the rotation of the second extended leveling plate 33 is restricted by the second rotation restricting means 70. For this reason, when the extended working body 30 is folded, the second extended leveling body 33 can be reliably prevented from colliding with the work machine main body 10 when the agricultural working machine advances the field or the like. It is possible to prevent a situation in which noise is generated by the collision of the extended leveling body 33 or the second extended leveling body 33 and the like are damaged. Further, when the extension work body 30 is in the folded position, the second extended leveling plate 33 is in a position in which the tip is directed downward, so that the front-rear length with respect to the traveling direction of the folding farm work machine 1 can be shortened. It is possible to facilitate the moving operation of the farm work machine when moving in the field or the like. Moreover, since the front-end | tip part of the 2nd extension leveling board 33 can be turned below, the possibility that the front-end | tip part of the 2nd extension leveling board 33 may contact an obstruction etc. can be suppressed.

  On the other hand, when the extension working body 30 in the folded posture is rotated to the unfolded posture side, as shown in FIG. 4, the rotation restricting shaft portion 73 is locked to the locking recess 75, so The ground plane 33 is maintained in a state in which the rotation is restricted. When the extension work body 30 moves to a position immediately before the deployed posture in such a state, the connecting shaft portion 72 contacts the side plate portion 16a and the connecting shaft portion 72 resists the biasing force of the biasing spring. The rotation restricting shaft portion 73 is removed from the locking recess 75, and the rotation restriction of the second extension leveling plate 33 is released. Then, the second extension leveling plate 33 rotates downward with the rotation center O as a rotation fulcrum. Soon, the connecting shaft portion 72 that is urged toward the second leveling plate 16 and slides on the side plate portion 16a is inserted into the fixing hole 76, and the second extended leveling plate 33 and the second leveling plate 16 are connected. The

  As described above, the folding agricultural work machine 1 of the present invention is configured such that the distal end portion of the connecting shaft portion 72 contacts the side plate portion 16a above the fixed hole portion 76 when the extended working body 30 moves to the position immediately before the unfolding posture. However, it is a natural idea that the connecting shaft portion 72 is directly inserted into the fixing hole portion 76 when the extended working body 30 is in the deployed posture. However, the folding agricultural work machine 1 of the present application does not employ the latter configuration. This is because the extension work body 30 and the work machine main body 10 are structured to extend in the axial direction, so that the extension work body 30 and the work machine main body 10 are bent and connected by their own weights when the extension work body 30 is set in the deployed posture. There is a possibility that the relative position of the shaft portion 72 and the fixed hole portion 76 is shifted. Therefore, it is possible to reinforce the rigidity of the extension work body 30 and the work machine main body 10 so that these relative positions do not shift. However, this increases the weight of the farm work machine and increases the cost. Occurs. Accordingly, there is a need for a structure in which the connecting shaft portion 72 can be inserted into the fixed hole portion 76 without increasing the rigidity of the extension work body 30 and the work machine main body 10, and as a result, the extension work body 30 is positioned immediately before the deployed posture. A structure has been developed in which the distal end portion of the connecting shaft portion 72 comes into contact with the side plate portion 16a above the fixed hole portion 76 when moved to.

  For this reason, the folding agricultural work machine 1 of the present application has rigidity as it is compared to the case where the connecting shaft portion 72 is directly inserted into the fixed hole portion 76 when the extended working body 30 is in the deployed posture. The allowable range of the assembly accuracy of the extension work body 30 and the attachment accuracy of the connecting shaft portion 72 can be increased, and the cost increase of the farm work machine can be suppressed.

  The connecting shaft portion 72 is configured such that the distal end portion of the connecting shaft portion 72 is below the fixed hole portion 76 when the extension work body 30 rotates to the deployment posture side and moves to a position immediately before the deployment posture. You may make it contact | abut. In this case, when the work is started, the second extension leveling plate 33 eventually turns upward by the ground pressure and is biased toward the second leveling plate 16 to slide on the side plate 16a. 72 is inserted into the fixing hole 76, and the second extended leveling plate 33 and the second leveling plate 16 are integrated.

  In the above-described embodiment, the locking recess 75 having the first locking surface 75a and the second locking surface 75b is provided at the tip of the side plate portion 32a as a means for locking the rotation restricting shaft portion 73. The function of the locking recess 75 may be divided. That is, as shown in FIG. 8 (side view) and FIG. 9 (side view), a first locking surface 75a for restricting the rotation of one side of the rotation restricting shaft portion 73 is provided at the tip of the side plate portion 32a. The second extension leveling plate 33 is restricted from rotating on one side, and the second extension leveling plate 33 comes into contact with the base end portion of the second extension leveling plate 33 on the second leveling plate side to contact the second extension leveling plate 33a. You may provide the 2nd latching surface 75b which controls rotation of the other side of the baseplate 33 in the movement control member 36 mentioned above.

  The first locking surface 75a is the tip of the side plate portion 32a extending from the first leveling plate side end of the first extension leveling plate 32 to the second extension leveling plate 32 side, and the second extension leveling plate 33 is rotated. It is in the movement locus of the rotation restricting shaft portion 73 that rotates around the center O as a rotation fulcrum, and further, the rotation restricting shaft in a state where the first extension leveling plate 32 and the second extension leveling plate 33 extend in a substantially vertical direction. It is provided at a position in contact with the portion 73. The first locking surface 75 a is formed in a curved shape or a substantially flat shape that can hold the rotation restricting shaft portion 73.

  When the connecting shaft portion 72 is fitted into the fixed hole portion 76, the rotation restricting shaft portion 73 comes into contact with the outer surface of the upper end of the side plate portion 32a. When the extension work body 30 rotates from the deployed position to the folded position, the connecting shaft portion 72 is removed from the fixed hole portion 76, and the second extension leveling plate 33 moves downward with the rotation center O as the rotation fulcrum. At the same time, the rotation regulating shaft portion 73 urged toward the second leveling plate 16 slides on the side plate portion 32a, and the position of the rotation regulating shaft portion 73 is positioned at the first locking surface 75a. Is exceeded, the biased rotation restricting shaft portion 73 protrudes toward the second leveling plate 16 and moves to a close position along the first locking surface 75a.

  The second locking surface 75b is on the base side of the side plate portion 32a, and the rotation restricting shaft portion 73 is in the close position in the movement locus of the base end portion 33a on the second leveling plate side of the second extension leveling plate 33. When moved, the base end portion 33a is disposed at a position where it comes into contact with the second locking surface 75b. For this reason, when the rotation restricting shaft portion 73 moves to the close position, the base end portion 33a abuts against the second locking surface 75b to restrict the rotation of one side of the second extended leveling plate 33, and The movement restricting shaft portion 73 abuts on the first locking surface 75a to restrict the rotation of the second extended leveling plate 33 on the other side.

  Further, when the extension work body 30 is rotated to the folding posture side to be in the folding posture, as shown in FIG. 8, the second locking surface 75b is in the upward orientation, and the second extension leveling plate 33 is rotated downward. The rotation restricting shaft portion 73 comes into contact with the first locking surface 75a, and the downward rotation of the second extended leveling plate 33 is restricted. Further, the base end portion 33a shown in FIG. 9 moves to a position in the vicinity of the second locking surface 75b, and the upward rotation of the second extended leveling plate 33 is restricted.

  Thus, by providing the first locking surface 75a at the distal end portion of the side plate portion 32a and providing the second locking surface 75b on the base side of the side plate portion 32a, the extension work body 30 is provided in the same manner as in the above-described embodiment. The rotation of the second extension leveling plate 33 when in the folded position can be restricted, and the rotation of the second extension leveling plate 33 may generate noise or damage the second extension leveling plate 33 or the like. Can be prevented in advance. Further, since the first locking surface 75a and the second locking surface 75b are arranged at positions separated from each other, the force received to restrict the rotation of the second extended leveling plate 33 can be dispersed. It is possible to suppress the rigidity of the first locking surface 75a and the second locking surface 75b that are received.

  The locking member 77 may be provided on either one side or both sides of the side plate portions provided at both ends of the first extended leveling plate 32. In the above-described embodiment, the folding farm working machine 1 for shaving is described as an example. However, the second rotation restricting means 70 described above may be attached to the folding farm working machine for plowing and crushed soil.

The top view of the folding farming machine for scribing concerning one embodiment of the present invention is shown. The perspective view of the 2nd rotation control means provided in this folding agricultural work machine is shown. The fragmentary sectional view for demonstrating the action | operation of a 2nd rotation control means is shown. The fragmentary sectional view for demonstrating the action | operation of a 2nd rotation control means is shown. The side view of a folding agricultural work machine when an extension work body exists in a folding attitude | position is shown. The rear view of the 2nd extension leveling body by which rotation restrictions were canceled is shown. The state which the 2nd extended leveling body and the 2nd leveling body were connected is shown, The figure (a) is a top view of these leveling bodies, The figure (b) is a rear view of these leveling bodies. The side view of the folding farming machine for scribing concerning other embodiment of this invention is shown. The side view of the 2nd rotation control means concerning other embodiment is shown. The perspective view of the conventional folding farm working machine for substitutes is shown.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Folding agricultural work machine 10 Work machine main body 14 Leveling body 16a, 32a Side plate part 30 Extension work body 32 1st extension leveling board 33 2nd extension leveling board 70 2nd rotation control means (rotation control means)
71 Shaft body portion 72 Connecting shaft portion 73 Rotation restricting shaft portion 74 Biasing spring 75 Locking recess 75a First locking surface 75b Second locking surface 76 Fixed hole portion

Claims (7)

A cultivating body that performs the tilling work, a first leveling board that is positioned so as to be pivotable in the vertical direction at the rear position of the tilling body, and a position that is pivotable in the vertical direction at the rear position of the first leveling board. A working machine main body having a second leveling plate for performing leveling work, and an extended cultivating body that is rotatably provided at the end in the width direction of the working machine main body so as to be foldable and extends the working width of the cultivating body; A first extension leveling plate that performs leveling work in a position that is rotatable in the vertical direction at the rear position of the extended tillage body, and is leveled in a position that is rotatable in the vertical direction at a rear position of the first extension leveling board. A folding agricultural machine having an extended work body having a second extended leveling board for performing
In conjunction with the rotation of the extension work body, the second extension leveling board and the second leveling board are connected and disconnected, and when the extension work body is in the folded position, it is locked to the first extension leveling board. Then, when the rotation of the second extension leveling plate is restricted and the extension work body is set to the deployed position, the lock with the first extension leveling plate is released and the rotation restriction of the second extension leveling plate is released. A folding agricultural machine characterized by comprising a movement regulating means. The rotation restricting means is
A connecting shaft portion that is provided at the second leveling plate side end of the second extension leveling plate and connects and disconnects the second extension leveling plate and the second leveling plate in conjunction with the rotation of the extension working body. When the extended working body is in the folded position, the first extended leveling plate is locked to restrict the rotation of the second extended leveling plate, and when the extended working body is set in the unfolded position, The folding agricultural work machine according to claim 1, further comprising a rotation regulating shaft portion that is unlocked from the first extension leveling plate and releases the rotation restriction of the second extension leveling plate. The rotation restricting means is
A shaft main body portion supported at the second leveling plate side end portion of the second extension leveling plate so as to be movable in the width direction of the second extension leveling plate, and integrally on the second leveling plate side of the shaft main body portion From the provided connecting shaft portion and the rotation regulating shaft portion, biasing means for biasing the shaft main body portion toward the second leveling plate side, and a first leveling plate side end portion of the first extension leveling plate A locking recess provided at a distal end portion of a side plate portion extending toward the second extension leveling plate side to lock the rotation restriction shaft portion and restrict rotation of the second extension leveling plate; and the second leveling plate And a fixing hole portion that is provided at an end portion of the second extension leveling plate and is fitted to the connecting shaft portion so as to integrally connect the second extension leveling plate and the second leveling plate. The folding agricultural machine according to claim 2.   The locking recess has a first locking surface and a second locking surface that come into contact with one end and the other end in the rotation direction of the second extension leveling plate in the rotation restricting shaft. The folding agricultural machine according to claim 3, wherein The connecting shaft portion of the rotation restricting means is
When the extension working body rotates to the deployment posture side and moves to a position immediately before the deployment posture, the distal end portion of the connecting shaft portion comes into contact with the side plate portion provided with the fixed hole portion above the fixed hole portion. The folding farm work machine according to any one of claims 2 to 4 characterized by these.   6. The second extension leveling plate according to claim 1, wherein when the extension work body is in a folded position, the second extended leveling board is in a posture in which a tip is directed downward in a state where the rotation is restricted by the rotation restriction means. The folding agricultural machine according to any one of the above. The rotation restricting means is
A shaft main body portion supported at the second leveling plate side end portion of the second extension leveling plate so as to be movable in the width direction of the second extension leveling plate, and integrally on the second leveling plate side of the shaft main body portion From the provided connecting shaft portion and the rotation regulating shaft portion, biasing means for biasing the shaft main body portion toward the second leveling plate side, and a first leveling plate side end portion of the first extension leveling plate The first locking surface and the side plate that are provided at the front end portion of the side plate portion that extends toward the second extended leveling plate and that abuts against the rotation restriction shaft portion and restricts the rotation of one side of the second extended leveling plate. A second locking surface that is provided on the base side of the second portion and contacts the second leveling plate side end of the second extension leveling plate to restrict the rotation of the other side of the second extension leveling plate; A fixing hole portion that is provided at an end portion of the second leveling plate on the second extension leveling plate side and that fits with the connecting shaft portion and integrally connects the second extension leveling plate and the second leveling plate; Folding agricultural machine according to claim 2, wherein.

Images