JP5210703B2 - Tillage work machine - Google Patents

Description

  The present invention includes an apron that is rotatably supported in the vertical direction at the rear end portion of the upper cover that covers the upper part of the rotary work body, and a leveler that is rotatably supported in the vertical direction at the rear end portion of the apron. More particularly, the present invention relates to a tilling work machine capable of lifting and locking an apron.

  Such a tilling work machine is capable of lifting and locking the apron to a predetermined raised position in order to facilitate replacement work of the tilling claws provided on the rotary work body and cleaning of the upper cover when not working. A work machine is conventionally known.

  In such a tilling work machine, for example, as shown in FIG. 10A (perspective view), a substantially V-shaped lock is provided adjacent to the pressure adjusting device 62 provided on the back side of the apron 61. There is a lever 66 that is pivotable in the front-rear direction (see Patent Document 1). In order to lift the apron 61 of the tiller to a predetermined raised position with respect to the main cover 68 that rotatably supports the front end portion of the apron 61, the apron 61 is grasped with both hands and the lock lever The apron 61 is lifted with both hands while holding the grip portion 66b formed on the rear side of the 66 with both hands, and the hook portion 66a formed on the front end portion of the lock lever 66 is hooked on the main cover 68. When the pin 66 is moved to an upper position and the grip 66b of the lock lever 66 is released while supporting the apron 61 with both hands, the lock lever 66 biased forward by the coil spring 67 is tilted forward. The hook portion 66a moves downward and is hooked on the latch pin 69.

  Further, as shown in FIG. 10B (cross-sectional view), the tilling work machine has a fixing rod provided at the rear end portion of a compression rod (leveling body support rod in the literature) 72 provided on the back side of the apron 71. The pin insertion hole is provided with a lock mechanism (leveling body fixing means 73 in the literature) that allows the apron 71 to be locked in the raised position by inserting a fixing pin 74 movably provided on the back side of the compression rod 72. There is a thing (refer patent document 2).

  In order to lift the apron 71 of the tillage work machine to a predetermined ascending position, the operator operates the switching lever 75 of the lock mechanism 73 to pull out the fixing pin 74 from the compression rod 72, and the operator uses the both hands to move the apron 71 behind. The apron 71 is lifted while gripping the end. As the apron 71 rotates upward, the tip of the fixing pin 74 moves along the compression rod 72, and when the tip of the fixing pin 74 moves to the fixing pin insertion hole provided in the compression rod 72, the pin is fixed. The pin 74 enters the fixed pin insertion hole, and the apron 71 is fixed to the compression rod 72 in a state where it is moved to the raised position.

JP-A-2-238801 JP 2001-128503 A

  Both the tilling work machines described in Patent Document 1 and Patent Document 2 can lock the apron by lifting it up to the raised position. To lift the apron to the raised position, the operator holds the rear end of the apron. There is a problem that the lifting operation of the apron, which is a heavy object, is a heavy labor for the worker.

  Moreover, the tilling work machine provided with such a conventional lock mechanism is mainly provided in a rotary work machine that plows and cultivates cultivated soil in a field, and is hardly provided in a substitute working machine. This is because the cultivated soil in the field where it is cultivated and crushed is harder than the cultivated soil in the paddy field with a large amount of water, which is the subject of scraping, and the life of the cultivating claws provided on the rotary work body is shortened. This is because the tilling nail comes into contact with the cultivated soil attached to the inner side and the life of the tilling nail is further shortened, and the necessity for replacing the tilling nail is high. On the other hand, the plowing machine has a longer life of the tilling claws than the rotary working machine, but the tilling claws may need to be replaced. In addition, it is necessary to remove the ridges and the like existing in the field when they wrap around the rotary work body. For this reason, it is desired that the scraping work machine can be easily lifted up and locked by the apron as well as the rotary work machine.

  The present invention has been made in order to respond to such problems and demands, and is intended to provide a tilling work machine that can be applied to a plowing work machine and that can easily lift an apron.

  In order to solve such a problem, the present invention has the following features. One of the features is that a rotary working body that is rotatably provided on the machine body, an upper cover that covers the upper part of the rotary working body, and an apron that is rotatably supported in the vertical direction at the rear end of the upper cover. In the plowing work machine (for example, the plowing work machine 1 in the embodiment), the apron is provided with an apron lifting member attached to the apron and having a handle at the tip, and the apron lifting member is lifted up. In some cases, the grip portion is located behind the rear end of the apron.

  According to this feature, an apron lifting member having a proximal end portion attached to the apron and having a handle portion at the distal end portion is provided, and when the apron lifting member is lifted, the handle portion is behind the rear end of the apron. When the apron is lifted up, the apron lifting member is lifted upward via a grip portion located rearward of the rear end of the apron. For this reason, compared to the case where the rear end of the apron is directly gripped and lifted upward, the length from the fulcrum to the force point is increased and the moment is increased, so that the lifting force of the apron can be reduced. The apron lifting operation can be facilitated. The apron lifting member may have any configuration as long as the handle is positioned behind the rear end of the apron when the apron lifting member is lifted, for example, the apron lifting member The apron lifting member is slidable to the rear end side of the apron and the apron lifting member is detachably attached to the apron. When the apron is lifted, the apron lifting member is attached to the apron, and when the apron is not lifted, the apron lifting member May be removed from the apron, and the proximal end portion of the apron lifting member may be attached to the widthwise end portion of the apron or the back side of the apron.

  Also, one of the features is that the apron lifting member has a proximal end pivotably provided on the apron so that the apron lifting member can be rotated to the rear end side of the apron, and the apron lifting member is disposed on the apron rear end side. When turned, the grip portion is located behind the rear end of the apron.

  According to this feature, the apron lifting member has its proximal end pivotably provided on the apron and is rotatable to the rear end side of the apron, and the apron lifting member is turned to the rear end side of the apron. When the apron is lifted by the rear end of the apron when the apron is lifted, the apron may be turned to the rear end side. For this reason, the preparatory work for the apron lifting member when lifting the apron can be facilitated.

  Also, one of the features is that a leveler supported rotatably in the vertical direction is provided at the rear end portion of the apron, and the apron lifting member is turned more proximally than the handle portion of the apron lifting member. In this state, a connecting member that protrudes toward the leveler and is connected to the end in the width direction of the leveler is provided.

  According to this feature, by providing a leveler at the rear end of the apron, and by providing a connecting member that protrudes toward the leveler side in a rotating state of the apron lifting member and is connected to the widthwise end of the leveler. When the apron lifting member is turned, the widthwise end of the leveler is connected to the apron lifting member by the connecting member, and when the apron lifting member is lifted in this state, the relative position of the leveler to the apron is not changed. You can lift the leveler with the apron. For this reason, during the lifting operation of the apron, the leveler can be free to swing and prevent the leveler from coming into contact with the operator who lifts the apron. Can be further enhanced. In addition, since the leveler does not hang down, there is an advantage that it does not interfere with claw replacement and removal of dredging / mud.

  The connecting member may be anything as long as the apron lifting member is connected to the widthwise end of the leveler and the apron lifting member when the apron lifting member is turned. For example, the connecting member may be connected to the widthwise end of the leveler. It may be a plate-like member to be placed or a member having a notch recess capable of sandwiching the widthwise end of the leveler.

  Also, one of the features is that when the apron lifting member turns into the apron lifting member at the end in the width direction of the apron and the proximal end of the apron lifting member facing the end, the side away from the leveler of the apron lifting member Rotation restricting means (for example, the support member 22 and the rotation restricting pin 41 in the embodiment) for restricting the rotation is provided.

  According to this feature, when the apron lifting member is turned to the apron lifting member facing the end in the width direction of the apron and the proximal end of the apron lifting member, the apron lifting member is separated from the leveler of the apron lifting member. By providing the rotation restricting means for restricting the rotation, when the apron lifting member is turned, the rotation on the side away from the leveler of the apron lifting member is restricted, so during the apron lifting operation, It is possible to prevent a situation in which the end in the width direction of the leveler is detached from the apron lifting member, and to further improve the safety of the apron lifting operation. The rotation restricting means may be anything that restricts the rotation of the apron lifting member away from the leveler when the apron lifting member is in a rotating state. A contact member provided on one of the apron lifting members and capable of contacting pins, protrusions, etc., is provided on the other of the apron and the apron lifting members, and when the apron lifting member is turned, the pins, protrusions, etc. contact the contact members. Then, the rotation of the apron lifting member away from the leveler may be restricted.

  Also, one of the features is that the apron lifting member is stored in a posture in which the grip portion side faces the front end side of the apron and the entire apron lifting member is along the side surface of the apron width direction end portion. And

  According to this feature, the apron lifting member is stored in a posture in which the handle portion side faces the front end side of the apron and along the side surface of the apron width direction end portion. There is no hindrance when entering the warehouse. Moreover, the impression which the stored apron lifting member gives to the tilling work machine can be reduced, and the appearance of the tilling work machine can be maintained in a good state.

  In addition, one of the features is that one of the side plate standing upright from the upper cover (for example, the second side plate 18 in the embodiment) and the apron can move forward and backward with respect to the other side plate standing up from the upper cover and the apron. When the apron provided on the other of the side plate and the apron provided upright from the upper cover is lifted to a raised position with a predetermined angle with respect to the side plate provided upright from the upper cover, the lock pin is engaged. It is characterized by including a lock mechanism having a mating engaging portion.

  According to this feature, by providing a lock mechanism having a lock pin and an engaging portion, the apron is lifted to the raised position, and when the lock pin is engaged with the engaging portion, the apron is fixed at the raised position. Can do. In this embodiment, the lock mechanism that locks the apron to the upper cover includes a lock pin and an engaging portion, and has a simple configuration with a small number of parts. For this reason, the lock mechanism can be made small and inexpensive. In addition, since the lock mechanism is small, the influence of the lock mechanism on the entire tilling work machine is small, and the appearance of the tilling work machine can be maintained in a good state.

  One of the features is that the lock pin is biased toward the engaging portion by an elastic member (for example, the compression spring 53 in the embodiment).

  According to this feature, when the apron is lifted to the raised position by urging the lock pin toward the engagement portion by the elastic member, the lock pin urged by the elastic member engages with the engagement portion. . For this reason, the apron can be automatically locked at the raised position, and the apron can be locked easily. The elastic member may be anything as long as it has elasticity, for example, a coil spring, a leaf spring, or the like.

  According to the plowing work machine concerning the present invention, by having the above-mentioned feature, it is possible to apply to a plowing work machine, and it is possible to provide a plowing work machine that is easy to lift an apron.

  Hereinafter, a preferred embodiment of the present invention will be described with reference to FIGS. In the present embodiment, a plowing work machine for plowing a paddy field will be described as an example of the plowing work machine. As a tilling work machine, in addition to the plowing work machine, a rotary work machine that plows the cultivated soil in the field and grounds the ground.

  As shown in FIG. 2 (side view) and FIG. 3 (plan view), the scraping work machine 1 is provided at the front part of the machine body 5 having the main frame 3 extending in the width direction at the rear part of the traveling machine body. A top mast 6 connected to the three-point link connecting mechanism and a lower link connecting portion are provided, and are attached to the rear portion of the traveling machine body so as to be movable up and down. Moreover, the caster-equipped stand 8 is detachably provided at both ends of the front portion of the machine body 5. A gear box 9 having an input shaft 9a protruding forward is provided in the central portion of the main frame 3 in the axial direction, and power is transferred from the PTO shaft of the traveling machine body to the input shaft 9a through power transmission means such as a universal joint. It is to be transmitted.

  A chain transmission case 11 is suspended from one end of the main frame 3, and a side frame 13 is suspended from the other end of the main frame 3 so as to face the chain transmission case 11. A rotary mechanism in which a transmission mechanism is provided on one side of the main frame 3 connected to the chain transmission case 11 and in the chain transmission case 11, and a plurality of tilling claws are attached between the lower ends of the chain transmission case 11 and the side frame 13. A work body 15 is rotatably provided. The power transmitted to the input shaft 9a is transmitted to the transmission mechanism in the main frame 3 and the chain transmission case 11 via the gear box 9, and the rotary work body 15 is rotated in the down cut direction (counterclockwise direction). Let

  The upper side of the rotary working body 15 is covered with an upper cover 17. The upper cover 17 extends from the front side of the rotary working body 15 to the rear side, and an apron 20 is attached to the rear end portion of the upper cover 17 so as to be rotatable in the vertical direction.

  The apron 20 has a rear end side extending obliquely downward from the rear end of the upper cover 17, and the rear end portion 20a of the apron 20 is formed in a substantially straight line shape in the left-right direction to level the cultivated soil surface flatly. The apron 20 is attached so as to be rotatable in the vertical direction between a pair of second side plates 18 projecting rearward from both ends of the upper cover 17. The apron 20 is provided with a pair of first side plates 21 extending in the front-rear direction at both ends thereof, and a lock mechanism 50 shown in FIG. 5 described later is provided on one of the first side plates 21. By this locking mechanism 50, the apron 20 is automatically locked to the second side plate 18 at the raised position where the apron 20 swings upward.

  A leveler 23 is attached to the rear end of the apron 20 so as to be rotatable in the vertical direction. The leveler 23 is rotatably attached between a pair of first side plates 21 erected on both ends of the apron 20. Brackets 24 are erected at both ends of the leveler 23, and an extension leveler 25 extends horizontally to the outside of the leveler 23 via the bracket 24 and a storage position in which the leveler 23 is rotated and stored in the leveler side. It is possible to tumble between.

  As shown in FIGS. 4 (side view) and FIG. 5 (rear view), the apron lifting member 30 used when lifting the apron 20 is disposed outside the first side plate 21 of the apron 20 thus configured. Is provided.

  The apron lifting member 30 is rotated toward the leveler 23 when in use, and is rotated toward the upper cover 17 when not in use. The apron lifting member 30 is provided at the rear end side of the first side plate 21 so that the base end portion is rotatably provided and the distal end side thereof is rotatable, and the apron lifting member 30 is provided at the distal end portion of the rotary shaft portion 31. The handle portion 38 is provided. A connecting plate 32 protruding from the base end portion is integrally attached to the base end portion of the rotating shaft portion 31, and a shaft inserted in a direction substantially orthogonal to the connecting plate 32 on the distal end side of the connecting plate 32. A portion 33 is provided. The connecting plate 32 is rotatably supported with respect to the shaft portion 33 by a retaining ring 34 or the like attached to the shaft portion 33, and the lower end portion of the shaft portion 33 is protruded from the rear end side of the first side plate 21. It is fixed on the member 22. Therefore, the apron lifting member 30 rotates between the retracted state Ck along the first side plate 21 of the apron 20 and the rotating state Ct (to be described later) in which the handle portion 38 faces the leveler 23 side with the shaft portion 33 as the center. It is free.

  On the distal end side of the rotary shaft portion 31, a covering member 39 made of rubber or the like is attached to form the above-described handle portion 38 that is gripped by the operator. When the apron lifting member 30 is in the retracted state Ck with the grip portion 38 side facing the front side of the apron 20 and along the first side plate 21, and the apron lifting member 30 is in the retracted state Ck, the apron lifting member 30 moves to the first side plate 21. The rotating shaft part 31 is clamped by the provided holding member 21a, and the apron lifting member 30 is held. The holding member 21a is formed by bending an elastic member such as a leaf spring into a U shape, and holds the rotating shaft portion 31 of the apron lifting member 30 so that it can be inserted and removed.

  The apron lifting member 30 is arranged so that the tip on the handle portion 38 side is located outside the tip of the second side plate 18 protruding in the retracted state Ck. For this reason, the front end portion of the stored apron lifting member 30 on the handle portion 38 side does not come into contact with the second side plate 18.

  When the apron lifting member 30 is in the rotating state Ct, the widthwise end 23a of the leveler 23 is placed on the intermediate portion in the axial direction of the rotating shaft portion 31 and the leveler 23 and the apron lifting member are connected to each other. A connecting member 35 is provided. As shown in FIG. 1 (an explanatory diagram viewed from above), the connecting member 35 is a plate-like member on which the widthwise end portion 23a of the leveler 23 is placed when the apron lifting member 30 is turned. . The apron lifting member 30 is lifted in a state where the end 23a in the width direction of the leveler 23 is placed on the connecting member 35, and moves the leveler 23 together with the apron 20. The rotating state Ct of the apron lifting member 30 means that the connecting member 35 and the end 23a in the width direction of the leveler 23 are connected regardless of the overlap margin between the connecting member 35 and the end 23a in the width direction of the leveler 23. It means the state of the apron lifting member 30 when it is overlapped.

  The apron lifting member 30 is provided so that the handle portion 38 is located behind the rear end of the apron 20 when the apron lifting member 30 is in the rotating state Ct. In addition, the position of the handle part 38 when the apron lifting member 30 is in the rotating state Ct may be located behind the rear end of the apron 20, and the handle part 38 is located on the side of the leveler 23 shown in FIG. 1. But you can. In this way, the position of the handle portion 38 when the apron lifting member 30 is in the rotating state Ct is positioned behind the rear end of the apron 20, so that the apron 20 is lifted with both hands. Thus, the distance L from the rotation fulcrum O of the apron 20 to the position where the apron 20 is lifted by the apron lifting member 30 can be made longer than the distance X from the rotation fulcrum O of the apron 20 to the rear end of the apron. As a result, the moment increases and the lifting force of the apron 20 acting on the handle portion 38 can be reduced. For this reason, the lifting operation of the apron 20 can be facilitated.

As shown in FIG. 4, a rotation restricting pin 41 is movably inserted in the direction substantially orthogonal to the connecting plate 32 on the rotating shaft portion 31 side of the connecting plate 32. The rotation restricting pin 41 includes a straight portion 41a inserted through the connecting plate 32 and a grip portion 41b that bends and extends from the upper end of the straight portion 41a. The straight portion 41a is movably inserted into an insertion hole provided in the connecting plate 32, and the lower end portion of the straight portion 41a is shown in FIG. 1 as the apron lifting member 30 rotates from the retracted state Ck to the leveler 23. It moves on the surface of the support member 22 until just before the turning state Ct, and when the apron lifting member 30 becomes the turning state Ct, the lower end portion of the linear portion 41a moves to a position away from the support member 22.

  For this reason, when the apron lifting member 30 is in the rotating state Ct and the rotation restricting pin 41 is pushed toward the support member 22 via the grip portion 41b, the straight line of the rotation restricting pin 41 is shown in FIG. The portion 41a moves to the support member 22 side, and the linear portion 41a is disposed to face the end surface 22a of the support member 22 facing the leveler 23 side. For this reason, when the apron lifting member 30 is rotated to the side away from the leveler 23, the linear portion 41 a comes into contact with the end surface 22 a, and the rotation of the apron lifting member 30 on the side away from the leveler 23 is restricted. Thus, it is possible to prevent a situation in which the end in the width direction of the leveler 23 comes off from the connecting member 35.

  The rotation restriction of the apron lifting member 30 is not limited to the above-described configuration. For example, the support member 22 that extends from the first side plate 21 described above and extends to the leveler side is used. A hole for guiding the movement of the rotation restricting pin 41 in a state where the straight portion 41a of the rotation restricting pin 41 is inserted is provided at a predetermined position, the apron lifting member 30 is turned, and the straight portion 41a is the hole. When the apron lifting member 30 in the rotating state is rotated to the retracted state side, the straight portion 41a is restricted by the hole portion of the support member 22, and the leveler 23 of the apron lifting member 30 is inserted. You may make it regulate rotation to the side which leaves | separates from.

  Further, a biasing spring may be provided on the rotation restricting pin 41, and the rotation restricting pin 41 may be biased toward the support member 22 by the biasing spring. In this way, as the apron lifting member 30 moves from the retracted state to the turning state Ct, the rotation restricting pin 41 automatically moves to the support member 22 side, and from the leveler 23 of the apron lifting member 30. It is possible to automatically regulate the rotation to the side that separates.

  The lock mechanism 50 described above is provided on the end portion of the first side plate 21 erected on the end portion in the width direction of the apron 20 and the second side plate 18 projecting from the end portion in the width direction of the upper cover 17. Is provided. As shown in FIG. 7 (plan view), the lock mechanism 50 includes a lock pin 51 provided so as to be able to advance and retreat relative to the second side plate 18, and a view provided on the second side plate 18 through which the lock pin 51 can be inserted. 8 and an engagement hole 55 shown in FIG.

  The lock pin 51 is arranged in a direction substantially orthogonal to the first side plate 21 and the second side plate 18 and extends linearly, and a grip portion 51b that bends and extends from an end of the pin main body portion 51a. It has. The pin main body 51a is movably inserted into a support bracket 52 attached to the inside of the first side plate 21, and the pin main body 51a extends to the first side plate 21 side and is a communication hole (see FIG. (Not shown). A compression spring 53 is attached to the pin body 51a, and the lock pin 51 is always urged toward the second side plate 18 by the compression spring 53. In the support bracket 52, a latch member 54 that latches the grip 51 b in order to hold the lock pin 51 in a state in which the pin main body 51 a is removed from the engagement hole 55 shown in FIG. 8. Is provided. Note that the tip of the pin main body 51a of the lock pin 51 is secondly urged by the compression spring 53 while the grip 51b is not hooked to the hooking member 54 and within the vertical swing range of the apron 20. It is always in contact with the inner surface of the side plate 18.

Engaging holes 55 for inserting the lock pin 51, as shown in FIG. 8, apron 20 a distal end side of the second side plate 18 is lifted to the raised position P i having a predetermined angle with respect to the upper cover 17 It is provided at a position facing the lock pin 51 that moves as it is moved.

  As described above, the lock mechanism 50 includes the lock pin 51, the support bracket 52 that supports the lock pin 51, the compression spring 53 that urges the lock pin 51, the latch member 54 that latches the grip 51 b of the lock pin 51, and the lock pin. Since it is configured to have the engaging hole portion 55 through which 51 can be inserted, its structure is simple and small. For this reason, the influence of the impression which the lock mechanism 50 gives to the whole scraping work machine 1 is small, and the appearance of the scraping work machine 1 can be kept favorable. Instead of the engagement hole 55, an engagement recess or engagement notch may be used.

  Next, the case where the apron 20 of the scraping work machine 1 configured as described above is lifted will be described. First, when the apron 20 is lifted, the scraping work machine 1 is usually lifted and supported by the caster-equipped stand 8 or connected to the rear part of the traveling machine body. One of the states that has been set is made.

  In this state where the scraping work machine 1 is lifted and supported, the operator holds the apron lifting member 30 in the retracted state Ck shown in FIG. Rotate. As the apron lifting member 30 is rotated to the leveler 23 side, the tip of the linear portion 41a of the rotation restricting pin 41 moves on the support member 22, and when the apron lifting member 30 is in the rotating state Ct, FIG. As shown in FIGS. 1 and 6, the end in the width direction of the leveler 23 is placed on the connecting member 35 provided on the apron lifting member 30, and the linear portion 41 a faces the leveler 23 side of the support member 22. It moves to a position that can face the end face 22a.

  And the holding part 41b of the rotation control pin 41 is pushed to the support member 22 side, and the linear part 41a is made to oppose the end surface 22a. As a result, even if the apron lifting member 30 rotates to the side away from the leveler 23, the linear portion 41a of the rotation restricting pin 41 hits the end surface 22a, and the apron lifting member 30 moves away from the leveler 23. The rotation can be restricted. Therefore, it is possible to prevent a situation in which the widthwise end portion of the leveler 23 is detached from the connecting member 35, and it is possible to improve work safety during the apron lifting operation.

  When the operator lifts the apron lifting member 30 while gripping the handle portion 38, the apron 20 rotates upward and the leveler 23 also moves upward while being placed on the connecting member 35. For this reason, the leveler 23 does not swing freely during the operation of lifting the apron lifting member 30 upward, and the safety of the apron lifting operation can be further improved.

As the apron lifting member 30 is lifted, the tip of the pin body 51a of the lock pin 51 moves on the inner surface of the second side plate 18 while urging the inner surface. Then, when the apron 20 is rotated to the raised position Pi, as shown in FIGS. 8 and 9, the pin main body 51a of the lock pin 51 enters the engagement hole 55 provided in the second side plate 18, The apron 20 is locked to the second side plate 18 so that the inside of the rotary working body 15 and the upper cover 17 is exposed. Accordingly, the replacement work of the tilling claws provided on the rotary working body 15 and the cleaning of the inside of the upper cover 17 can be easily performed.

Next, the case where the apron 20 locked at the raised position Pi is unlocked and the apron 20 is rotated downward will be described. First, as shown in FIGS. 8 and 9, the apron is held against the urging force of the compression spring 53 while the grip 51 b of the lock pin 51 is held while gripping the handle 38 of the apron lifting member 30 in the rotating state Ct. The grip part 51b is hooked on the hook member 54 by moving inward. As a result, the lock pin 51 is removed from the engagement hole 55, and the apron 20 is brought into an unlocked state.

  When the apron 20 is unlocked, a part of the weight of the apron 20 and the leveler 23 acts on the operator via the handle portion 38 of the apron lifting member 30. As described above, the handle portion 38 is in the apron 20. Since it is arrange | positioned back rather than the rear end, the lifting force which acts on an operator can be made small, and the burden which acts on an operator can be reduced. And it moves below, supporting the apron lifting member 30, and makes the apron 20 hang down.

Then, the grip 41b of the rotation restricting pin 41 is moved away from the support member 22 to release the rotation restriction of the apron lifting member 30, and the apron lifting member 30 is turned away from the leveler 23. The leveler 23 is moved to remove the end of the leveler 23 in the width direction from the connecting member 35 so that the leveler 23 is in a free state. Then, the apron lifting member 30 is further rotated to the side away from the leveler 23 and is held by the holding member 21a, so that the apron lifting member 30 is brought into the retracted state Ck shown in FIG.

  As described above, even when the apron 20 is unlocked and rotated downward, the force acting on the worker through the handle portion 38 of the apron lifting member 30 is small, so the worker moves the apron 20 downward. The rocking operation can be easily performed. Further, in the downward swinging operation of the apron 20, since the rotation of the apron lifting member 30 is in a restricted state, the end in the width direction of the leveler 23 is not likely to come off from the connecting member 35, and the safety is high. Can be operated.

Explanatory drawing seen from the upper part of the apron raising member and locking mechanism which were provided in the scratching work machine concerning one embodiment of this invention is shown. The side view of the scraping work machine concerning one embodiment of the present invention is shown. It is a top view of the scraping work machine concerning one embodiment of the present invention. The side view of the apron lifting member and lock mechanism which were provided in the scraping work machine concerning one embodiment of the present invention is shown. The rear view of the width direction edge part of an alternative working machine when an apron raising member is in a retracted state and a lock mechanism will be in an unlocked state is shown. The rear view of the part seen from the direction shown by the arrow I of FIG. 1 is shown. The top view of the width direction edge part of a skimmer is shown when the apron lifting member is in the retracted state and the lock mechanism is in the unlocked state. The side view of the scraping work machine when an apron exists in a raise position is shown. The top view of the width direction edge part of the scraping work machine when an apron exists in a raise position is shown. The tillage working machine provided with the conventional lock mechanism is shown.

Explanation of symbols

1st generation work machine (cultivation work machine)
5 Machine body 15 Rotary work body 17 Upper cover 18 Second side plate (side plate)
20 Apron 22 Support member (turning restricting means)
23 leveler 30 apron lifting member 35 connecting member 38 handle part 41 rotation restricting pin (rotation restricting means)
50 Locking mechanism 51 Lock pin 53 Compression spring (elastic member)
55 engaging holes Ct turning state P i raised position

Claims (7)

Tillage working machine provided with a rotary working body rotatably provided on the machine body, an upper cover that covers the upper part of the rotary working body, and an apron that is rotatably supported in the vertical direction at the rear end of the upper cover In
An apron lifting member having a proximal end attached to the apron and having a handle at the distal end,
A tilling work machine, wherein when the apron lifting member is lifted, the grip portion is positioned rearward of the rear end of the apron. The apron lifting member has a base end portion rotatably provided on the apron and is rotatable to the rear end side of the apron,
The tilling work machine according to claim 1, wherein when the apron lifting member is turned to the rear end side of the apron, the grip portion is located rearward of the rear end of the apron. At the rear end of the apron, a leveler that is rotatably supported in the vertical direction is provided,
A connecting member that protrudes toward the leveler side in a rotating state of the apron lifting member and is connected to an end portion in the width direction of the leveler is provided at a proximal end portion of the apron lifting member with respect to the handle portion. The tillage work machine according to claim 2 characterized by things. When the apron lifting member turns into the apron lifting member facing the end in the width direction of the apron and the proximal end of the apron lifting member, the rotation of the apron lifting member on the side away from the leveler 4. A tilling work machine according to claim 3 , wherein a rotation restricting means for restricting movement is provided.   The apron lifting member is stored in a posture in which the handle portion side faces the front end side of the apron and along the side surface of the apron width direction end portion. Tillage work machine as described in.   A side plate erected from the upper cover and a side plate erected from the upper cover on one of the apron and a lock pin provided to be able to advance and retreat with respect to the other of the apron, and a side plate erected from the upper cover And an engaging portion which is provided on the other side of the apron and can be engaged with the lock pin when the apron is lifted to a raised position having a predetermined angle with respect to a side plate erected from the upper cover. The tilling work machine according to claim 1, further comprising a lock mechanism.   The tilling work machine according to claim 6, wherein the lock pin is urged toward the engaging portion by an elastic member.

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