JP5182706B2 - Coupling member for extension leveler in folding machine - Google Patents

Description

  The present invention is a folding work machine having a main work machine located behind the tractor and an extension work machine that is foldably connected to the main work machine, such as a plowing work machine and a tilling work machine, in the folded state of the extension work machine. The present invention relates to an extension leveler link member in a folding work machine in which an extension leveler that is swingably connected to the rear of the work machine can be freely rotated with respect to the extension work machine in accordance with an external force received by the work machine.

  In a folding work machine having a main work machine connected to the rear part of the tractor and an extension work machine that is foldably connected to both sides or one side of the main work machine, the extension work machine is unfolded, that is, the extension work machine is connected to the main work machine. It is necessary to link the extension work machine to the main work machine in the connected state.

  The main work machine and the extension work machine are each composed of a rotor driven by the power from the tractor and a shield cover covering the upper side, and tilling claws projecting on the rotary shaft constituting the rotor behind the shield cover, etc. An apron for preventing the earth and sand scattered by the claws from scattering backward is rotatably connected around an axis parallel to the rotor (rotary shaft). Behind the apron, a leveler for leveling the soil in the vicinity of the farm scene is connected so as to be swingable around an axis parallel to the rotor.

  While working with the extension work machine deployed, the rotor (rotary shaft) of the extension work machine is connected to the rotor (rotary shaft) of the main work machine so that power can be transmitted from the main work machine. On the other hand, the apron behind the shield cover covering each rotor (rotary shaft) can behave independently depending on the degree of unevenness in the field.

  If both aprons swing independently, the leveler connected to each apron cannot level the field scene, so the apron of the extension work machine swings in conjunction with the apron of the main work machine. It is desirable. The same applies to the leveler of the extension work machine and the leveler of the main work machine. Therefore, the apron and the leveler of the extension work machine need to be provided with linking members for interlocking with the apron and the leveler of the main work machine, respectively ( (See Patent Documents 1 and 2).

  Each apron is rotatably connected to the rear of the shield cover, and the leveler is swingably connected to the rear of each apron. Therefore, the linking member is installed separately for the apron and the leveler of the extension work machine.

  Each linking member must be separable from the apron and the leveler of the main work machine when folded while engaging the apron and the leveler of the main work machine in the swinging direction when the extension work machine is in the deployed (connected) state. There is. On the other hand, since the extension work machine rotates about the rotation axis parallel to the traveling direction of the tractor on the plane with respect to the main work machine, each linking member is engaged with the main work machine by rotating around the rotation axis. And the state of disengagement need to be switched.

  In this relationship, each linking member is supported by the extension leveler so that it can be moved in and out of the main working machine side in the direction perpendicular to the rotation axis, and the main working machine is connected to the main working machine side in the direction of linkage. There is a lockable part that can be stopped, and the extension work machine side is used to transmit the force received by the locked part to the extension work machine and to maintain the locked state in the direction of linkage to the extension work machine It has a locking part. The swing of the apron and leveler of the main work machine is transmitted to the extension machine by transmitting the force received by the locked part of the linkage member from the locking part of the leveler to the apron and leveler of the extension machine. The machine is linked to the main work machine.

  Here, if the leveler can swing freely with respect to the apron when the extension machine is in the folded state, the leveler will be violated by vibration during the movement of the folding machine, causing damage to the apron and the leveler, and noise. Therefore, it is appropriate that the leveler is restrained by an apron so that the leveler cannot freely swing as in Patent Document 2.

  In Patent Document 2, the locking portion of the linkage member that penetrates the side plate of the extension leveler is inserted into a recess formed in the side plate of the extension apron, and the locking portion is recessed in the direction of positive and negative swinging that the extension leveler is about to rotate. The rotation angle of the extension leveler with respect to the extension apron is limited by engaging with. In this case, the front end of the locking part enters the concave part of the side plate and engages with the inner peripheral surface of the concave part in any rotation direction, so that the locking part is prevented from coming out and the extension leveler is free from the extension apron. Rotation is prevented.

JP 2004-33020 A (Claim 1, paragraphs 0036 to 0050, FIGS. 1 and 4 to 6) JP 2007-185124 A (Claim 1, paragraphs 0031 to 0036, FIGS. 1 to 4)

  However, as shown in FIG. 1, when the extension work machine enters the field from a hoe or the like in a folded state, the leveler of the extension work machine may collide with the upper surface of the hoe or the like depending on the height of the hoe or the like. For this reason, if the rotation of the extension leveler with respect to the extension apron is prevented, the extension leveler may be damaged by a collision with a bag or the like.

  The soil that makes up the fence may be hardened or the fence itself may be made of concrete. In such a case, if the extension leveler collides with the fence, the extension leveler may be damaged. It is assumed that it is impossible to lock the linking member to the leveler at the time of connection with the main body working machine.

  The present invention is based on the above background. The extension in the folding work machine has a function of avoiding damage caused by the extension leveler colliding with the eaves or the like when the folding work machine enters the field from the eaves while the extension work machine is in the folded state. The link member for levelers is proposed.

The leveler linking member in the folding working machine according to claim 1 is connected to the rear portion of the tractor and is positioned behind the main body apron that covers the main body rotor driven by the power from the tractor, and the main body rotor. A main body working machine having a main body leveler that can swing around an axis parallel to the main body, an extension apron that covers the extension rotor connectable to the main body rotor of the main body working machine, and a rear part of the main body working machine that is parallel to the extension rotor. An extension leveler that is swingable around an axis, and an extension work machine that is foldable with respect to the main body work machine,
In the folding work machine in which the extension leveler is connected to the main body work machine of the extension work machine, and the extension member is installed with a linkage member that swings the extension leveler in conjunction with the swing of the main body leveler.
The linkage member has a locked portion that the extension leveler and the main body leveler lock when the extension work machine is connected to the main body work machine, and the extension leveler and the extension when the extension work machine is folded. It has a locking part that locks on the apron,
When the extension working machine is folded, when the extension leveler receives an external force in any of the swing directions, the locking portion can be detached from the extension apron.

  In the connected state (deployed state) of the extension work machine to the main body work machine, as shown in FIGS. 5 and 6, the extension leveler and the main body leveler are engaged with the locked portion of the linkage member in at least one of the swing directions. By stopping, since the force from the main body leveler is transmitted to the extension leveler through the locked portion of the linkage member, the extension leveler swings in conjunction with the swinging of the main body leveler. If the main body leveler is locked to the locked portion in any (positive or negative) swing direction, the extension leveler swings in conjunction with the positive / negative swing of the main body leveler.

  In addition, when the extension work machine is connected to the main work machine, the force received from the main body leveler can be removed from the state where the locking portion of the linkage member is locked to the extension apron as described below. While transmitting to the extension leveler through the linkage member, the extension leveler can swing with respect to the extension apron, and the swinging amount (angle) of the extension leveler linked to the main body leveler is limited.

  The state in which the main body leveler is locked to the locked portion of the linkage member is maintained when the extension work machine is in the unfolded state (when the folding work machine is in the working state), and when the extension work machine transitions to the folded state When the linking member is detached from the main body leveler, the locked state of the main body leveler to the locked portion is released.

  The linkage member is installed on the extension leveler so that it can always swing with respect to the extension apron together with the extension leveler regardless of the connection state (deployed state) and the folded state of the extension work machine. For example, the locking portion of the linking member is locked or engaged with the extension apron in any swinging direction, so that the rotation of the extension leveler with respect to the extension apron in that direction is prevented.

  When the extension work machine is in the folded state, the rotation of the extension leveler with respect to the extension apron is restricted by the locking portion locking or engaging with the extension apron. In the folded state of the extension machine, the locked state can be released when an external force exceeds the reaction force from the extended apron when the locked portion is locked to the extended apron, that is, the locked portion is released from the extended apron. It can be detached and rotated in the direction when an external force is applied.

  The linkage member is basically supported by the extension apron so as to be able to rotate around the connecting shaft parallel to the axis of the extension rotor together with the extension leveler. By locking or engaging, the extension leveler is suspended by its own weight around the connecting shaft to the extension apron as shown in FIGS. In a state where the extension leveler is suspended from the connecting shaft, the extension leveler rotates within a range that can swing around the connecting shaft with respect to the extension apron.

  When the extension leveler receives an external force from the state of FIG. 1 in the direction of flipping up as described above (the direction in which the lower surface side of the extension leveler overlaps the lower surface side of the extension apron) as shown in FIG. By rotating around the connecting shaft in the direction against its own weight, it avoids the action of impact due to receiving external force while stopped.

  When working with the folding work machine advanced while the extension work machine is in the folded state, if you try to lower the folding work machine to the normal work position (level) in an attempt to start work from the edge, folding work Since the machine descends abruptly by several hundreds of millimeters, the extension leveler of the extension work machine connected to the rear of the tractor as described above may collide with the upper surface of the ridge or the slope.

  Here, in the present invention, when the extension leveler swings by receiving an external force in any swing direction, the locking portion of the linkage member can be detached from the extension apron (Claim 1). The leveler can oscillate freely with respect to the extended apron by the action of external force and escape from the bag. For this reason, the extension leveler does not receive a shocking force from the heel or the like, the occurrence of damage due to the external force is avoided, and the situation where the linkage with the main body leveler becomes impossible due to the damage is also avoided. .

  When the locking portion of the linking member is engaged with the extension apron in a state in which the locking portion of the linking member is prevented from being pulled out from the recess as in Patent Document 2, at least one of the locking portion and the recess is bent by an external force. The extension leveler cannot swing unless it is deformed (plastically deformed) or broken, and the locking portion cannot be detached from the recess of the extension apron. On the other hand, in the present invention, as shown in FIG. 3, when the extension leveler receives an external force, the locking portion of the linking member is detached from the extension apron so that the locking portion does not break, and the extension leveler does not break. There is no occurrence of damage to the apron and the extended apron.

  In the present invention, when the extension leveler receives the external force in any of the swing directions and swings, the locking portion can be detached from the extension apron, but the extension leveler does not receive the external force. By maintaining the state in which it is locked to the extension apron, the extension leveler can be stabilized in a state of being suspended from the extension apron in the folded state. For this reason, the run-up of the extension leveler during traveling of the folding machine, that is, disordered behavior is prevented.

  Specifically, when the extension leveler swings in response to an external force in any of the swing directions, the locking portion of the linking member can be detached from the extension apron. This is possible by engaging the inner end surface of the recessed portion so that it can be detached from the recessed portion in a state where the tip portion enters the recessed portion formed in the extended apron (Claim 2).

  During normal times other than when the extension leveler receives external force from a hook or the like, the tip of the locking part maintains a state of locking (positive or negative) on the inner peripheral surface of the recess of the extension apron, as described above. When an external force exceeding the frictional force or pressure acting between the two ends when the tip is locked in the recess acts on the extension leveler, the tip is released from the recess, and the extension leveler is against the extension apron. Can be rotated.

  The fact that the locking portion of the linkage member is detached from the recess of the extension apron means that when the extension leveler receives the external force when the extension work machine is folded, the locking portion is temporarily deformed such as bending deformation. An axis (connection shaft) parallel to the extension rotor (rotary shaft) while the linking member (locking portion) is immersed in the extension work machine side by the action of the force received by the locking portion from the inner peripheral surface of the recess (Claim 3), it becomes possible.

  In the latter case (Claim 3), the linking member is supported by the extension leveler so as to be movable (in / out) in a direction parallel to the axis of the extension rotor. Here, for example, if the linkage member is maintained in a state of being biased by the biasing member in the direction of projecting toward the main body leveler side, the locked portion of the linkage member is in the connected state (deployed state) of the extension work machine. The main body leveler is locked or engaged with the concave portion or the convex portion, and the locking portion can be detached from the inner peripheral surface of the concave portion of the extension apron. When the locking portion is detached from the inner peripheral surface of the recess of the extension apron, the extension leveler can swing with respect to the extension apron, and can be interlocked with the main body leveler that is locked or the like.

  Further, when maintaining the state in which the linking member is urged by the urging member in the protruding direction toward the main body leveler, for example, when the extension work machine shifts from the folded state to the connected state, When entering the concave portion of the main body leveler shown in FIG. 5 and engaging with it, when the force from the main body leveler to the extended leveler side is temporarily received, the convex portion around the concave portion is overcome and the biasing force of the biasing member ( I can immerse against the resilience.

  When the extension work machine is in the folded state, the extent of the external force that the extension leveler receives from the eaves and the like and the magnitude of the urging force by immersing the linkage member into the extension leveler side against the urging force of the urging member. If the extension leveler receives an external force within the expected range, it is set so that the locking part of the linkage member is released from the concave part of the extension apron, and the external force within a certain amount During operation, it is possible to keep the locking portion locked or engaged with the recess of the extension apron.

  When the linking member can be projected and retracted in a direction parallel to the surface of the extension apron main body (extension rotor or a direction parallel to the connecting shaft) (Claim 3), the recess of the extension apron that the locking portion of the linking member locks In order to make it easy to obtain a locked state, it is appropriate to form the plate at a position that intersects with the extending and retracting direction of the linking member. That is, it is appropriate that the extended apron comprises, for example, an extended apron main body and a side plate integrated with an end portion in the width direction, and a concave portion of the extended apron is formed on the side plate.

  In this case, a recess is formed in the side plate of the extension apron, so that the locking member is detached from the recess and penetrated into the recess by using the movement of the linkage member in the direction parallel to the extension rotor or the connecting shaft. It becomes easy to let.

  In addition, the locking portion of the linking member is kept locked to the recess of the extension apron in any direction of swinging in the folded state of the extension work machine, and the locking portion and the recess when the external force is applied. In order to be able to detach from the recess without any damage, the side plate of the extended apron is composed of a side plate material and an auxiliary material that overlaps and integrates the side plate material and the auxiliary material. It is appropriate that a recess is formed between the two (claim 5).

  In this case, a groove is formed between the side plate material and the auxiliary material so as to receive the engaging portion of the linkage member as a concave portion of the extended apron. The groove (concave portion) is formed, for example, in a part of an arc trajectory centering on the connecting shaft that is the rotating shaft of the linking member. The detachment is caused, and the state of detachment is restored from the detachment state by the reverse rotation.

  According to the fifth aspect of the present invention, the locking member is released from the recess and penetrated into the recess by the rotation of the linkage member around the connecting shaft, so that the extension leveler rotates about the connecting shaft when receiving an external force from a flange or the like. Therefore, the structure is suitable for preventing damage due to external force.

  The extension leveler receives an external force from the eaves and the like, is rotated around the connecting shaft and is flipped up, and the state shown in FIG. 3- (b) is when the tip of the locking part is in contact with the inner peripheral surface of the recess. Although it can be held for at least a certain period of time by frictional force or pressure, it is also possible to return to the locked state by the weight of the extension leveler (Claim 6). The return due to rotation under its own weight occurs when the center of gravity (centroid) on the cross section of the extension leveler is located around the connecting shaft, so that it is more likely to occur as the center of gravity of the extension leveler is further away from the position of the connecting shaft.

  In this case, since the locking portion of the linkage member is detached from the extension apron, the extension work machine can be held in the folded state by being able to return to the locking state to the extension apron by the weight of the extension leveler. When the folding work machine enters the field from the fence etc., the extension leveler automatically returns to the locked state with the extension apron. It becomes possible to move to.

  If the extension leveler is detached from the extension apron and kept in the state of being flipped up, the linking member integrated with the extension leveler is also in a state of rotating with respect to the extension apron, and the locked portion of the main body leveler is Since it deviates from the locking position, when the extension work machine shifts from the folded state to the connected state, the locked portion of the linkage member does not link to the main body leveler. On the other hand, in claim 6, the external force disappears and at the same time the extension leveler returns to the locking state to the extension apron, so that the locked portion of the linkage member matches the locking position of the main body leveler. Therefore, it is possible to shift to a state in which the main body leveler is locked to the locked portion by simply unfolding the extension work machine from the folded state.

  When the extension leveler receives an external force in any of the swing directions and swings, the locking portion of the linking member can be detached from the extension apron, so that the extension leveler swings against the extension apron by the action of the external force. Since it can move and escape from the heel etc., the extension leveler and the extension apron do not receive shocking force from the heel etc.

  Since the situation where the extension leveler and the apron are not damaged does not occur, there is no situation such as breaking of the locking part, and the occurrence of damage to the extension machine due to receiving external force is avoided. Therefore, it is possible to avoid a situation in which the linkage with the main body leveler becomes impossible.

It is the side view which showed the relationship between the extension apron and the extension leveler in a folding work machine when an extension work machine exists in a folding state. It is the arrow directional view of the xx line | wire of FIG. 1 which showed the extension apron and the extension leveler. (A) is the enlarged view of the connection part of the extension apron and extension leveler in FIG. 1, (b) is the enlarged view of FIG. 1 which showed a mode when the extension leveler rotated from the state of (a). It is the elevation view which showed the back side of the folding working machine when the extension working machine is in the unfolded state. It is the perspective view which showed the connection part of the extension leveler at the time of forming a recessed part in the side plate of a main body leveler, and a main body leveler. It is the perspective view which showed the connection part of the extension leveler at the time of forming a convex part in the side plate of a main body leveler, and a main body leveler. (A) is a plan view in FIG. 6 showing a state in which the locking portion of the linkage member penetrates into the concave portion of the side plate of the extension apron and is locked in the positive and negative directions, and (b) is the linkage of the linkage member. FIG. 7 is a plan view in FIG. 6 illustrating a state when the stop portion is detached from the concave portion and the extension leveler is rotated. FIGS. 7- (a) and (b) are perspective views showing the position of the locking portion, where the solid line indicates the state when the locking portion is in the recess, and the two-dot chain line indicates the locking portion is the recess. It shows the situation when leaving.

  Hereinafter, the best mode for carrying out the present invention will be described with reference to the drawings.

  FIG. 1 shows a main body working machine 2 having a main body apron 5 and a main body leveler 6 connected to the rear portion of the tractor 40 as shown in FIG. 4, and an extension apron 10 and an extension leveler that are foldable with respect to the main body working machine 2. 1 shows a side view of a folding working machine (hereinafter, working machine) 1 provided with an extension working machine 7 having 11. FIG. 1 also shows that the extension leveler 11 is kept suspended from the extension apron 10 by its own weight when the extension work machine 7 is in the folded state.

  The main body working machine 2 is disposed at the rear part of the tractor 40, and a main body shield cover 4 that covers the main body rotor 3 that is driven by receiving power from the tractor 40, a main body apron 5 connected to the rear thereof, and a rear of the main body apron 5. It has a main body leveler 6 that is positioned and swingable about an axis parallel to the main body rotor 3. The extension work machine 7 is located behind the extension shield cover 9 that covers the extension rotor 8 that can be connected to the main body rotor 3 of the main work machine 2, the extension apron 10 connected to the rear thereof, and the extension apron 10. 8 has an extension leveler 11 that can swing around an axis parallel to 8, and is supported so as to be foldable with respect to the main body working machine 2.

  As shown in FIG. 1, the main body work machine 2 as the main body of the work machine 1 includes a top mast 12 connected to a three-point link hitch mechanism including a top link and a lower link at the rear of the tractor 40, and a lower link connection part 13. The tractor 40 is mounted on the rear portion of the tractor 40 through the three-point link hitch mechanism so as to be movable up and down.

  A gear box 14 connected to the PTO shaft of the tractor 40 via a universal joint, a transmission shaft, and the like is disposed at the lower end of the top mast 12, and as shown in FIG. A transmission frame 15 and a support frame 16 are installed in the direction. The power from the PTO shaft is transmitted to the input shaft of the gear box 14, and the power received by the input shaft is transmitted to the transmission shaft that is inserted through the transmission frame 15.

  A chain transmission case 17 is fixed to the tip of the transmission frame 15 so as to hang down, and an end cover 18 facing the chain transmission case 17 is fixed to the tip of the support frame 15. A rotary shaft 3a of the main body rotor 3 is installed between the chain transmission case 17 and the end cover 18 so as to be rotatable about the axis. A chain is stretched between the chain transmission case 17 and the rotary shaft 3a, and the power of the transmission shaft is transmitted to the rotary shaft 3a through the chain.

  As shown in FIG. 4, the main body shield cover 4 is joined to the chain transmission case 17 and the end cover 18 at end plates 4a and 4a at both ends thereof, and is transmitted at a connecting member 4b protruding from the upper surface (outer peripheral surface). It is supported by both frames 15 and 16 by being joined to lower brackets 15a and 16a protruding below the frame 15 and the support frame 16.

  As shown in FIG. 1, a claw 3b such as a tilling claw protrudes from the outer periphery of the rotary shaft 3a at an appropriate interval in the circumferential direction, and the main body rotor 3 is constituted by the rotary shaft 3a and the claw 3b. The claws 3b are arranged at an interval that does not interfere with each other in the axial direction of the rotary shaft 3a. The claws 3b and 3b adjacent to each other in the axial direction of the rotary shaft 3a are arranged at an angle with respect to the center of the shaft, for example, and the tip of the claw 3b has a rotation locus indicated by a two-dot chain line in FIG. Draw.

  As shown in FIG. 1, the extension work machine 7 has an extension rotor 8 that rotates simultaneously with the main body rotor 3 when deployed, an extension shield cover 9 that covers the extension rotor 8, and end plates 9 a that are located on both sides of the extension shield cover 9 in the width direction. The end plate 9a is connected to the end plate 4a of the main body working machine 2 so that the end plate 9a can be unfolded and folded. For example, the extension work machine 7 is connected to the main work machine 2 so as to be rotatable around an axis inclined in the vertical direction with respect to the traveling direction.

  The extension rotor 8 of the extension work machine 7 receives power from the main body rotor 3 when the rotary shaft 8a is connected to the rotary shaft 3a of the main body rotor 3 of the main work machine 2 via a clutch during deployment. The extension rotor 8 includes a rotary shaft 8a connected to the rotary shaft 3a and a claw 8b protruding from the outer periphery thereof. In FIG. 1, the claw 8 b is indicated by a two-dot chain line as a rotation locus drawn by the tip portion.

  As shown in FIGS. 1 and 4, the extension work machine 7 protrudes at a position closer to the rear on the upper side of the end plate 4 a in the main work machine 2, with the bracket 9 b protruding from the upper side of the end plate 9 a. By being connected to the bracket 4c by a pin 9c or a bolt as a rotation shaft, the bracket 4c is connected in a state where it can be expanded and retracted. The rotation axis composed of the pins 9c and the like is on the plane and faces the direction parallel to the traveling direction of the tractor 40, and the extension working machine 7 is placed on the rear side in the running direction of the main working machine 2 when the extension working machine 7 is folded. Is inclined to the front side (the tractor 40 side) with respect to the horizontal plane.

  As shown in FIG. 4, the extension work machine 7 is switched between the unfolded state and the retracted state by a switching cylinder 19 installed between the main body work machine 2 and the extension work machine 7. It is restrained by the restraint (lock) device which holds the state of In the drawing, the end of the switching cylinder 19 on the main body work machine 2 side is connected to the transmission frame 15 and the support frame 16, but the switching cylinder 19 is installed between the main body shield cover 4 and the extension shield cover 9. Sometimes.

  As shown in FIG. 2, the extension leveler 11 is linked to the extension leveler 7 that swings the extension leveler 11 linked to the swinging of the main body leveler 6 when the extension work unit 7 is connected to the main unit working machine 2. A member (hereinafter referred to as a linkage member) 20 is installed. The linking member 20 has a locked portion 21 to which the extension leveler 11 and the main body leveler 6 are locked when the extension work machine 7 is connected to the main body work machine 2, and extends with the extension leveler 11 when the extension work machine 7 is folded. It has the latching | locking part 22 latched to the apron 10. FIG. When the extension leveler 11 receives an external force in any of the swing directions when the extension work machine 7 is folded, the linkage member 20 rotates together with the extension leveler 11 in the direction in which the external force acts to extend the locking portion 22. It is in a state where it can be detached from the apron 10.

  A side plate (side plate 6a of the main body leveler 6) that closes the respective end portions of the main body apron 5 and the main body leveler 6 in the width direction is integrated. Side plates 10a and 11a for closing the ends of the main bodies are integrated with the ends in the width direction. As shown in FIGS. 2, 5, and 6, when the extension work machine 7 is connected to the main body work machine 2, the locked portion 21 of the linkage member 20 swings at least one of the side plates 6 a of the main body leveler 6. It is locked or engaged (hereinafter referred to as locking) in the direction.

  As shown in FIG. 5, the locked portion 21 of the linking member 20 has an inner peripheral surface of a recess 6b formed on the surface of the side plate 6a of the main body leveler 6 on the surface of the extension work machine 7, or a convex as shown in FIG. The one side (either upper or lower) surface of the portion 6c is locked or the like, and the concave portion 6b or the convex portion 6c is locked or the like to the locked portion 21, thereby extending in conjunction with the swing of the main body leveler 6. The leveler 11 swings. The concave portion 6b of the side plate 6a is formed, for example, by projecting a plate on the surface on the side of the extension work machine 7 and forming a relative convex part, or forming a groove on the surface on the side of the extension work machine 7 as shown in FIG. It is formed by doing.

  When a plate is projected on one side of the side plate 6a, when the plate projects above and below the portion corresponding to the recess 6b, the portion sandwiched between the upper and lower plates becomes the recess 6b, and the main body leveler 6 is positive or negative. Lock to the locked portion 21 in the (up and down) direction. As shown in FIG. 6, when the plate protrudes only on one side of the portion corresponding to the concave portion 6 b, the plate becomes the convex portion 6 c, so that the upper surface or the lower surface of the convex portion 6 c becomes the locked portion 21. Lock upward or downward. When the extension leveler 11 is interlocked with the swing of the main body leveler 6 in the positive / negative (up and down) direction, the concave portion 6b is formed at the tip portion position of the locked portion 21, or the convex portion is above and below the tip portion position. 6c is formed.

  However, when the main body leveler 6 is restrained, for example, by the downward rotation and the downward rotation of the main body leveler 6 is restricted, the extension leveler 11 is moved to the upward rotation (swing) of the main body leveler 6. Since it only needs to be interlocked, as shown in FIG. 6, it is only necessary to project a plate serving as the convex portion 6 c only on the lower side of the locked portion 21 (the tip portion thereof).

  As shown in FIG. 4, the linking member 20 is installed on the upper surface of the extension leveler 11 when the extension work machine 7 is in the unfolded state, and is supported at one place or a plurality of places. The linking member 20 has a locked portion 21 on the main body leveler 6 side, and when the extension work machine 7 shifts from the folded state to the unfolded state by rotation around the bracket 4c and the pin 9c passing through the bracket 9b. The locked portion 21 that protrudes toward the main body leveler 6 is locked to the concave portion 6b or the convex portion 6c.

  The extension work machine 7 is connected to the main work machine 2 by rotating around the pin 9c described above, and the connected state is released, so that the linking member 20 is extended in parallel to a plane perpendicular to the axis of the pin 9c. The apron 10 and the extension leveler 11 are supported by the extension leveler 11 so that they can protrude and retract in a direction parallel to the connecting shaft 10b.

  Further, since the linkage member 20 is rotatable with the extension leveler 11 with respect to the extension apron 10, it is supported by the extension leveler 11 so as to be rotatable around an axis parallel to the connecting shaft 10b. The shaft portion 20a, which is the main body of, is formed in a round bar shape or a square bar shape. Accordingly, a part of the shaft portion 20a on the main body leveler 6 side is used as the locking portion 22, and a locked portion 21 that is parallel to the shaft portion 20a is projected from the surface of the shaft portion 20a and is described later. When the extension work machine 7 is in the deployed state, the interlocking member 20 is positioned so that the locking portion 22 is engaged with the side plate 6a of the main body leveler 6 and the locking portion 22 is separated from the side plate 10a of the extension apron 10. Is a ten-handed shape.

  The shaft portion 20 a of the linkage member 20 is supported on the opposite side of the locking portion 22 so as to be movable in the axial direction of the extension leveler 11, that is, to be able to appear and retract. A support material 11c having an insertion hole through which the shaft portion 20a is inserted in the axial direction protrudes from the upper surface of the extension leveler 11, and the shaft portion 20a is supported by the support material 11c so as to be movable in the axial direction. As shown in FIG. 6, the locked portion 21 of the linking member 20 is inserted through the insertion hole 11 b formed in the side plate 11 a of the extension leveler 11 and locked to the concave portion 6 b or the convex portion 6 c of the main body leveler 6. Therefore, if the support member 11c is supported at one end of the shaft portion 20a, the linking member 20 is supported at two points. Therefore, it is not always necessary to support the end portion of the shaft portion 20a on the main body leveler 6 side. Absent.

  The linking member 20 is installed on the upper surface of the extension leveler 11 with the locked portion 21 and the locking portion 22 penetrating the side plate 10a through the insertion hole of the support member 11c at the end of the shaft portion 20a. A flange 20b is formed near the locking portion 22 of the shaft portion 20a. When the linkage member 2 is installed, a biasing member 20c such as a coil spring is compressed between the flange 20b and the support member 11c. The linking member 20 is urged toward the side plate 11a by the urging member 20c.

  When the extension work machine 7 is in the unfolded state, the tip of the locking portion 22 is engaged when the tip of the locked portion 21 is engaged with the concave portion 6b or the convex portion 6c while contacting the side plate 6a of the main body leveler 6. Is in a position separated from the side plate 10a of the extension apron 10. At this time, when the linking member 20 receives a reaction force from the side plate 6a toward the support member 11c, the main body leveler 6 and the locked portion 21 are securely engaged with each other, and the extended apron 10 (the recessed portion 10c) The extension leveler 11 released from the engagement is interlocked with the main body leveler 6 and can swing.

  Further, when the extension work machine 7 tries to shift from the folded state to the unfolded state, the locked portion 21 of the linkage member 20 is placed on the inner peripheral surface of the concave portion 6b of the side plate 6a of the main body leveler 6 or the surface of the convex portion 6c. By making contact (contact), the linking member 20 is once pushed to the support material 11c side and pulled. Thereafter, the linking member 20 protrudes toward the side plate 6a side of the main body leveler 6 by the restoring force of the urging member 20c, and the tip contacts the inner peripheral surface of the concave portion 6b or the surface of the convex portion 6c of the side plate 6a. Part) is engaged with the recess 6b or the protrusion 6c.

  The locked portion 21 of the linking member 20 penetrates the side plate 11a of the extension leveler 11 and reaches the side plate 6a of the main body leveler 6 at least when the extension work machine 7 is deployed. Since the 11a is penetrated, the locked portion 21 is always locked to the side plate 11a (extension leveler 11) in any direction.

  As will be described later, when the extension work machine 7 is folded, the locking portion 22 of the linking member 20 also passes through the side plate 11a of the extension leveler 11 and is locked to the side plate 10a of the extension apron 10, but the locking portion 22 is extended. The front end of the locking portion 22 is supported by the side plate 11a in a state where it can project and retract from the side plate 11a to the main body leveler 6 side because it can be detached from the apron 10 (the concave portion 10c).

  From this, when the extension work machine 7 is in the deployed state, the side plate 11a can reliably support the locking portion 22 even if the distal end portion of the locking portion 22 is immersed in (the thickness of) the side plate 11a. In the drawings, as shown in FIGS. 2 and 6, a hollow guide member 11 d into which the locking portion 22 can be inserted is fixed to the surface of the side plate 11 a on the side of the linkage member 20. Since the locking portion 22 is always inserted through the guide member 11d fixed to the side plate 11a, the locking portion 22 is always locked to the side plate 11a (extension leveler 11) both vertically.

  The side plate 11a of the extension leveler 11 is connected to the side plate 10a of the extension apron 10 by a connecting shaft 10b in a state of overlapping. Although the positional relationship between the side plates 11a and 10a is not particularly limited, in the drawing, in order to avoid interference between the side plate 11a and the main body leveler 6 including the side plate 6a, the side plate 11a of the extension leveler 11 is disposed on the main body leveler 6 side. The side plate 10a of the extended apron 10 is arranged, and bolts and pins that serve as the connecting shaft 10b are inserted through a range where the side plates 11a and 10a overlap.

  The shaft portion 20a (locking portion 22) of the linking member 20 passes through the guide member 11d projecting from the extension leveler 11 which is the installation position of the linking member 20 to the side plate 11a and the insertion hole of the side plate 11a continuous thereto. The extension apron 10 is engaged with the inner peripheral surface of the recess 10c formed on the side plate 11a side of the side plate 10a.

  The concave portion 10c formed on the side plate 10a of the extended apron 10 may be directly formed on the side plate 10a depending on the thickness (thickness) given to the side plate 10a, but in the drawing, the side that abuts against the side surface of the extended apron 10 The side plate 10a is composed of the plate material 10A and the auxiliary material 10B that overlaps and integrates, and a recess 10c is formed between the side plate material 10A and the auxiliary material 10B. If the side plate 10a is composed of two members, it is easier to form the recess 10c than if it is composed of one member. The auxiliary material 10B overlaps the side plate material 10A, and is integrated by being joined together by a fastening material 10d such as a bolt when the connecting shaft 10b is removed.

  The concave portion 10c formed in the side plate 10a has an arcuate shape when the locking portion 22 of the linkage member 20 rotates around the connecting shaft 10b as shown in FIGS. When the extension work machine 8 is located on the track and in the expanded state and in the folded state, the distal end portion of the locking portion 22 penetrates into the concave portion 10c and is stable in a state where it can contact the inner peripheral surface of the concave portion 10c. doing. “Can do” means that there may be some gap (play) in either direction. In FIG. 7, only the locking part 22 of the linkage member 20 is shown, and the locked part 21 is omitted.

  5 and 6 show the state of the extension work machine 7 when viewed from the upper surface side of the extension leveler 11 and the extension apron 10 when the extension work machine 7 is in the unfolded state. 6 is in a state in which it can be engaged with the inner peripheral surface of the recess 10c, protruding to the side plate 10a side of the extension apron 10 against the biasing member 20c. Rotation is blocked. Even when the extension working machine 7 is in the folded state, the extension leveler 11 and the extension apron 10 maintain the relationship shown in FIGS.

  The front end of the locking portion 22 has a direction in which the extension leveler 11 rotates up and down with respect to the extension apron 10, that is, a direction in which the upper surface of the extension leveler 11 tends to overlap the upper surface of the extension apron 10 in FIGS. The extension apron 10 is in a state where it can be locked or engaged in both directions to try to overlap the lower surface of the extension apron 10.

  In the drawing, as described above, when the upper surface of the extension leveler 11 rotates upward, the locking portion 22 is in a state in which no further rotation occurs when engaged with the inner peripheral surface of the recess 10c. In the direction in which the upper surface of the extension leveler 11 is rotated downward, as shown in FIG. 7- (b), the locking portion 22 rides on the inner periphery of the recess 10c and is in a state in which it can be detached from the recess 10c. In this way, in the example shown in the figure, when the extended leveler 11 returns to the suspended state by its own weight from the state rotated by receiving external force, the extended leveler 11 is reversed from the suspended state in order to stabilize quickly in the suspended state. Is trying not to rotate.

  However, the suspended state of the extension leveler 11 can ensure stability by adjusting the centroid position, and can be stabilized early even if the extension leveler 11 rotates in any direction from the suspended state. From the state in which the leveler 11 is suspended and the locking portion 22 is locked in the recess 10c, the locking portion 22 can be detached in any direction, and the extension leveler 11 can be any (positive or negative) around the connecting shaft 10b. It may also be rotatable in the direction.

  The state in which the extension leveler 11 does not rotate further from the state in which the locking portion 22 is engaged with the inner peripheral surface of the recess 10c so that the upper surface of the extension leveler 11 overlaps the upper surface of the extension apron 10 is shown in FIG. ), For example, the inner circumferential surface of the recess 10c is obtained by forming a surface orthogonal to the tip surface of the locking portion 22.

  As shown in FIG. 7- (a), in FIG. 5 and FIG. 6, the tip of the locking portion 22 is detachable from the recess 10c so that the bottom surface of the extension leveler 11 overlaps the bottom surface of the extension apron 10, If a force is applied in the direction, the extension leveler 11 rotates relative to the extension apron 10, and at the same time, the linkage member 20 is detached from the recess 10c as shown in FIG. 7- (b).

  The extension leveler 11 is further rotated from the state shown in FIG. 7- (a) in which the locking portion 22 is engaged with the inner peripheral surface of the recess 10c so that the lower surface of the extension leveler 11 overlaps the lower surface of the extension apron 10. The possible state is, for example, when the locking portion 22 is locked and is stationary, and the inner peripheral surface of the recess 10c moves from the stationary position to the position where the inner peripheral surface is about to move from the main body leveler 6 side to the extended leveler 11 side. It is obtained by attaching a slope toward The closer the inclined surface is parallel to the front and back surfaces of the side plate 11 a, the easier it is to release the locking portion 22, and the closer to the axial direction of the linkage member 20, the harder it is to release.

  From the state shown in FIG. 7- (a) to the state shown in FIG. 7- (b), the distal end surface of the locking portion 22 draws an arc-shaped locus as described above. The inclined surface is formed on an arcuate locus. FIG. 8 shows a state in which the locking portion 22 moves along the inner peripheral surface of the concave portion 10 c as the extension leveler 11 rotates with respect to the extension apron 10. In FIG. 8, the solid line shows the state when the locking portion 22 is in the recess 10c, and the two-dot chain line shows that the locking portion 22 is detached from the recess 10c and remains in contact with the surface of the auxiliary material 10B on the support material 11c side. It shows a state when moving on an arc trajectory.

  When the locking portion 22 of the linking member 20 is detached from the recess 10c and shifts to the state shown in FIG. 7- (b), the folding work machine 1 tries to enter the field from the straw 50 or the like as shown in FIG. This occurs when the extension leveler 11 receives a force from the upper surface or slope of the ridge 50 or the like.

  As shown in FIG. 7- (a), when the locking portion 22 of the linking member 20 is in a state of penetrating into the recess 10c of the side plate 10a, the tip surface of the locking portion 22 is a side surface of the auxiliary material 10B that constitutes the recess 10c. The linkage member 20 is in a state of being pushed toward the support member 11c by the auxiliary member 10B.

  When the extension leveler 11 receives a force in the direction indicated by the arrow in FIG. 6 from the state shown in FIG. 7A, the locking portion 22 of the linkage member 20 is recessed 10c as shown in FIG. 7B. And ride on the inner peripheral surface of the recess 10c. At this time, the linking member 20 is pushed toward the support member 11c side by the inner peripheral surface of the recess 10c and is immersed. When the linking member 20 is immersed in the support member 11c, the link member 20 receives a force toward the support member 11c, which is larger than the state shown in FIG. In the state shown in FIG. 7- (b), the restoring force of the urging member 20c increases from the state shown in FIG. 7- (a), so that the locking portion 22 always receives a force to penetrate into the recess 10c. become.

  In FIG. 7- (b), the extension leveler 11 jumps up from the state suspended from the connecting shaft 10b as shown in FIG. 3- (b), avoids the burden of external force, and extends when the external force is no longer applied. The leveler 11 rotates around the connecting shaft 10b by its own weight and returns to the state shown in FIG.

  Since the extension leveler 11 is composed of the main body and the side plate 11a integrated with the end in the width direction, the center of gravity (centroid) on the cross section shown in FIG. 3 exists in the central region of the side plate 11a. When suspended from the connecting shaft 10b, the center of gravity is stabilized in a state where the center of gravity is located on a vertical line passing through the connecting shaft 10b as shown in FIG.

  The stability of the extended leveler 11 in the suspended state increases as the position of the center of gravity is farther from the connecting shaft 11b. In addition, the time until the extension leveler 11 returns to the position shown in FIG. 3A by its own weight after the extension leveler 11 receives external force and the extension leveler 11 jumps up as shown in FIG. Therefore, it is possible to adjust the stability in the suspended state and the return time under its own weight by setting (adjusting) the position of the center of gravity.

  As shown in FIG. 4, the extension apron 10 is oscillated by linking the extension apron 10 to the swing of the main body apron 5 when the extension work machine 7 is connected to the main body work machine 2. An extension apron linking member 30 to be moved is installed. The configuration of the extended apron linking member 30 and the relationship between it and the side plate 10a of the extended apron 10 are the same as the relationship between the extended leveler linking member 20 and the side plate 11a of the extended leveler 11.

1 ... folding machine,
2 ... Main body working machine,
3 ... Main body rotor, 3a ... Rotary shaft, 3b ... Nail,
4 ... Body shield cover, 4a ... End plate, 4b ... Connecting material, 4c ... Bracket,
5 …… Main body apron,
6 ... body leveler, 6a ... side plate, 6b ... concave, 6c ... convex,
7: Extension work machine,
8 ... Extension rotor, 8a ... Rotary shaft, 8b ... Claw,
9: Extension shield cover, 9a: End plate, 9b: Bracket, 9c: Pin,
10 ... Extension apron, 10a ... Side plate, 10b ... Connecting shaft, 10c ... Recess, 10d ... Fastening material,
10A …… Side plate material, 10B …… Auxiliary material,
11 ... Extension leveler, 11a ... Side plate, 11b ... Insertion hole, 11c ... Support material, 11d ... Guide member,
12 …… Top mast, 13 …… Lower link joint,
14 …… Gearbox,
15 ... Transmission frame, 15a ... Lower bracket,
16: Support frame, 16a: Lower bracket,
17 …… Chain transmission case, 18 …… End cover, 19 …… Cylinder for switching,
20 ... Linking member for extension leveler, 20a ... Shaft, 20b ... Flange, 20c ... Biasing member,
21 …… Locked part, 22 …… Locking part,
30 …… Linking member for extended apron,
40 …… Tractor,
50 …… 畦.

Claims (6)

A main body working machine having a main body apron which is connected to the rear part of the tractor and covers the main body rotor driven by power from the tractor, and a main body leveler which is positioned behind the main body apron and can swing around an axis parallel to the main body rotor. An extension apron that covers the extension rotor connectable to the main body rotor of the main body working machine, and an extension leveler that is positioned behind the extension apron and is swingable about an axis parallel to the extension rotor. With an extension work machine that can be folded with respect to the machine,
In the folding work machine in which the extension leveler is connected to the main body work machine of the extension work machine, and the extension member is installed with a linkage member that swings the extension leveler in conjunction with the swing of the main body leveler.
The linkage member has a locked portion that the extension leveler and the main body leveler lock when the extension work machine is connected to the main body work machine, and the extension leveler and the extension when the extension work machine is folded. It has a locking part that locks on the apron,
The extension leveler in the folding work machine, wherein when the extension leveler receives an external force in any swinging direction when the extension work machine is folded, the locking portion can be detached from the extension apron. Linking member.   The distal end of the locking part on the side of the extended apron is engaged with the inner peripheral surface of the concave part so as to be detachable from the concave part while entering the concave part formed in the extended apron. Item 5. A link member for an extension leveler in the folding machine according to Item 1.   When the extension leveler receives the external force at the time of folding the extension work machine, the locking portion rotates around an axis parallel to the extension rotor while immersing in the extension work machine side. The extension leveler link member in the folding working machine according to claim 1, wherein the extension leveler link member is separated from the extension leveler.   The extension apron includes a side plate integrated with an extension apron main body and an end portion in a width direction thereof, and the recess of the extension apron is formed in the side plate. Member for extension leveler in the folding work machine.   The side plate of the said extension apron is comprised from the side plate material and the auxiliary material which overlaps and integrates this, The said recessed part is formed between the said side plate material and the said auxiliary material, The Claim 4 characterized by the above-mentioned. A link member for an extension leveler in the folding working machine described. The locking portion can be returned to a locking state to the extension apron by a weight of the extension leveler from a state of being detached from the extension apron when the extension work machine is folded. Item 6. A link member for an extension leveler in the folding work machine according to any one of Items 5 to 6.

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