JP6076674B2 - Shaving machine - Google Patents

Description

  According to the present invention, the upper part of the work rotor rotatably supported by the work machine body is covered with a shield cover, and a first leveling plate is provided at the rear end portion of the shield cover so as to be rotatable in the vertical direction. The present invention relates to a shaving work machine in which a second ground leveling plate is provided at the rear end portion of the base plate so as to be rotatable in the vertical direction.

  As such a shaving machine, there is known one that can lift up the raised soil formed at the end of the field cultivated by the work rotor. For example, as described in Patent Document 1, the scribing work machine has a second leveling plate (second leveling body in the literature) below the first leveling board (first leveling body in the literature). If it moves forward with the attitude | position which aimed at, the soil which the 2nd leveling board raised is moved to the low part of a farm field. At this time, the 1st leveling board and the 2nd leveling board are maintained in the state where rotation was locked.

  Further, in the proxy working machine described in Patent Document 2 (in the literature, an agricultural working machine), the second leveling plate is supported so as to be rotatable with respect to the first leveling plate, and only the first leveling plate is supported with respect to the working unit main body. Then, the soil moves forward with the rotation amount limited, and moves the soil raised by the first leveling plate to a lower part of the field.

JP 2002-186304 A JP 2008-136427 A

  In the conventional shaving work machine that puts the second leveling board in a downward direction at the time of digging work, the second leveling board originally has only enough strength to level the soil surface. If the earth leveling is performed with the second leveling plate directed downward, the second leveling plate may be deformed by the pressure received from the soil. In addition, although the shaving work machine is connected to the rear part of the traveling machine body and proceeds with the forward traveling of the traveling machine body, as shown in FIG. 9A, the worker M who has boarded the traveling machine body looks back to the rear side. Even if the second leveling plate 82 is being visually checked, the second leveling plate 82 is located on the rear side of the traveling machine body and is connected to the rear end of the first leveling plate 81 and below. Therefore, the second leveling plate 82 cannot be seen because a part of the substitute working machine gets in the way of the operator's line of sight. For this reason, it is impossible to predict the amount of soil that is difficult to understand how much the second leveling plate 82 has entered the soil.

  In addition, since the soil that is the target of the earthing work often stays in a raised state at the corners or near the edge of the field, it is ideal to start the earthing work as close to the edge as possible. However, since the second leveling board is difficult to see with the prior art, when trying to carry out the earthing work from the edge of the edge, the second leveling board may be accidentally brought into contact with the edge to break the edge (FIG. 9 (a)). See), and the second leveling board may be damaged.

  On the other hand, in the conventional shaving work machine that performs the earthing work with the first leveling plate, as shown in FIG. 9B, the second leveling plate 82 ′ is located on the rear side in the traveling direction of the first leveling plate 81 ′. Since it exists in the extended state, 1st leveling board 81 'cannot be approached at the time of dripping. For this reason, the rising soil of the shore W cannot be approached.

  The present invention has been made to solve such a problem, and there is no possibility that the second leveling board will be deformed at the time of soiling work, and the amount of soil to be gathered can be predicted. An object of the present invention is to provide a shaving machine capable of reliably collecting soil at the time.

  In order to achieve the above-described object, the working machine according to the present invention is such that the upper part of the work rotor rotatably supported by the work machine body is covered by a shield cover, and the first ground leveling plate is vertically moved at the rear end of the shield cover. And a second ground leveling plate provided at the rear end of the first leveling plate so as to be freely rotatable in the vertical direction. The working machine body includes a first leveling plate. On the other hand, a fixing means (fixing mechanisms 50 and 60 in the embodiment) capable of locking the rotation of the second leveling plate in a posture in which the second leveling plate stands upward is provided ( Claim 1).

  Further, the fixing means of the present invention rotates the first leveling plate relative to the work implement body when the rotation of the second leveling plate is locked with the second leveling plate standing upward with respect to the first leveling plate. Is also locked (claim 2).

  Further, the second leveling board of the present invention is connected via a link mechanism that is rotatably connected to the work machine body, and the fixing means can lock the rotation of the link mechanism, and the fixing means When the rotation of the link mechanism is locked by the above, the rotation of the second leveling plate relative to the first leveling plate is locked in a posture in which the second leveling plate stands upward (Claim 3).

  Further, the fixing means of the present invention includes an engaging means (engagement plate 51 in the embodiment) provided in the work machine main body, and a locking means (in the embodiment) provided in the link mechanism and capable of locking the engaging means. When the engaging means is locked and unlocked by the locking means, the second leveling plate is fixed and released from the first leveling plate. (Claim 4).

  According to the agricultural working machine according to the present invention, there is no fear that the second leveling board will be deformed at the time of the soiling work, and the groundworking machine that can reliably ground the soil at the rising edge. The purpose is to provide.

The top view of the scribing work machine concerning 1st Embodiment of this invention is shown. The rear view of a shaving machine is shown. The explanatory view of the side of the substitute working machine for explaining the operation of the fixing mechanism when the substitute working machine is in the working state is shown. The top view of a fixing mechanism when a substitute working machine exists in a working state is shown. The rear view of a fixing mechanism when a substitute working machine exists in a working state is shown. An explanatory view of the side of the substitution work machine for explaining the operation of the fixing mechanism when the substitution work machine is in the soiling state is shown. The side view side explanatory drawing of the scribing work machine for demonstrating the action | operation of a fixing mechanism when the scribing work machine concerning 2nd Embodiment of this invention exists in a working state is shown. The side view side explanatory drawing of the scribing work machine for demonstrating the action | operation of a fixing mechanism when the scribing work machine concerning 2nd Embodiment of this invention exists in the earthing state is shown. The schematic diagram of the side surface side of the 1st leveling board and the 2nd leveling board for demonstrating the conventional earthing work method is shown.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of a substitute working machine according to the present invention will be described with reference to FIGS. This embodiment will be described by taking, as an example, a substitute working machine in which the work body left and the work body right are provided to be foldable and unfoldable on both sides of the work machine main body. For convenience of explanation, the directions indicated by the arrows shown in FIG. 1 will be described below as the front-rear direction and the left-right direction.

[First embodiment]
As shown in FIG. 1 (plan view), the substitute working machine 1 is attached to the rear portion of the traveling machine body 90 and advances along with the forward traveling of the traveling machine body 90 to perform the substitute work. The substitute working machine 1 includes a work machine main body 2 disposed at the center in the left-right direction with respect to the forward direction, a work body left 20L attached to the left and right ends of the work machine main body 2 so as to be rotatable in the vertical direction, and The work body right 20R is provided, and the work machine main body 2, the work body left 20L, and the work body right 20R have a three-part structure.

  The work machine body 2 is connected to a front part of a machine body 5 having a main frame 3 extending in the left-right direction, and a three-point link coupling mechanism (not shown) provided at the rear part of the travel machine body 90 is connected to the rear part of the travel machine body 90. On the other hand, it is mounted so that it can be raised and lowered. A gear box 6 having an input shaft 6a protruding forward is provided at the center in the left-right direction of the main frame 3, and power is input from the PTO shaft of the traveling machine body 90 through a power transmission means such as a universal joint to the input shaft 6a. To be communicated to.

  A transmission frame (chain case) 8 and a side frame 9 are suspended from the left and right ends of the main frame 3, and a number of tilling claws are attached between the transmission frame (chain case) 8 and the lower portion of the side frame 9. A tilling rotor 13 (see FIG. 3) is rotatably supported. A transmission mechanism is provided in the main frame 3, and this transmission mechanism is coupled to a transmission mechanism in the transmission frame (chain case) 8, so that the power transmitted to the input shaft 6 a is transmitted to the work machine via these transmission mechanisms. It is transmitted to the tilling rotor 13 (see FIG. 3) of the main body 2, the tilling rotor provided on the working body left 20L, and the tilling rotor provided on the working body right 20R, and these tilling rotors 13 and the like are rotated in a predetermined direction. It is configured as follows.

  Between the upper part of the transmission frame (chain case) 8 and the side frame 9, a shield cover 10 is provided to cover the upper part of the tilling rotor 13 (see FIG. 3). The rear end portion of the shield cover 10 is provided with a first leveling plate 11 whose front side end portion is pivotably attached in the vertical direction and extends obliquely downward, and the rear end portion of the first leveling plate 11 has A second leveling plate 12 is provided to be rotatable in the vertical direction. The cultivated soil surface is leveled by the rear end portion of the first leveling plate 11, and the cultivated soil surface of the field is leveled by the second leveling plate 12.

  Box-like supports 15 extending upward are provided on the left and right sides of the shield cover 10 of the work machine body 2. A shaft portion 14 extending in the front-rear direction is provided on the upper portion of the support body 15, and the work body left 20 </ b> L and the work body right 20 </ b> R are connected to be rotatable in the vertical direction around the shaft portion 14. The work body left 20 </ b> L and the work body right 20 </ b> R are manually rotated by an operator and deployed to the work body storage position stored in the upper position of the work machine body 2 and the side position of the work machine body 2. The work body is moved between the work position (deployment position) where the work can be performed.

  Since the work body left 20L and the work body right 20R are symmetrical structures, the work body right 20R will be described, and the work body left 20L will be denoted by the same reference numerals as those of the work body right 20R, and description thereof will be omitted. . The work body right 20R is provided with side frames 22R, 22R on both the left and right sides, and a tilling rotor (not shown) receives power from the tilling rotor 13 of the work implement body 2 between the lower portions of the side frames 22R, 22R. A shield cover right 24R is provided between the upper portions of the side frames 22R and 22R so as to cover the upper portion of the tilling rotor. A first leveling plate right 26R is attached to the rear end of the shield cover right 24R so as to be rotatable in the vertical direction, and a second leveling plate right 28R is rotated in the vertical direction at the rear end of the first leveling plate right 26R. It is attached movably. A connecting body 29R extending upward is provided on the work machine main body side of the shield cover right 24R. The upper part of the connection body 29R on the work machine main body side is pivotally connected to a shaft portion 14 provided on the support body 15 of the work machine main body 2 so that the work body right 20R is vertically oriented with respect to the work machine main body 2. Can be rotated.

  An extended auxiliary leveling plate right 30R is provided at the outer end of the second leveling plate right 28R. In addition, the work body left 20L is also provided with the extension auxiliary leveling plate left 30L similar to the extension auxiliary leveling plate right 30R, but the extension auxiliary leveling plate left 30L has the same structure as the extension auxiliary leveling plate right 30R. Therefore, the extension auxiliary leveling plate left 30L is denoted by the same reference numerals as the extension auxiliary leveling plate right 30R, and the description thereof is omitted.

  The extension auxiliary leveling plate right 30R rotates around the shaft portion 21R provided at the outer end of the second leveling plate right 28R, and extends to the outside of the second leveling plate right 28R when deployed. The leveling work of the second leveling board right 28R is assisted, and when folded (stored), it is folded to the surface side of the second leveling board right 28R and overlapped with the second leveling board right 28R back to back.

  This extended auxiliary leveling plate right 30R can be unfolded and stored by an operation mechanism (not shown) capable of operating the extended auxiliary leveling plate right 30R in a state in which an operator who has boarded the traveling machine body turned back. .

  The work body left 20L and the work body right 20R are connected to the first leveling board 11 of the work machine body 2 with the first leveling board left 26L of the work body left 20L and the first leveling board right 26R of the work body right 20R. And the first leveling mechanism 33 that can be disconnected, the second leveling plate left 28L of the work body left 20L and the second leveling plate right 28R of the work body right 20R with respect to the second leveling plate 12 of the work machine body 2. A second rotation restricting mechanism 34 capable of connecting and releasing the connection is provided.

  When the first leveling plate left 26L (first leveling plate right 26R) moves to the working position with respect to the first leveling plate 11, the first rotation regulating mechanism 33 moves to the first leveling plate left 26L (first leveling plate right). 26R) is connected to the first leveling plate 11, and when the first leveling plate left 26L (first leveling plate right 26R) rotates from the working position to the storage position side, the first leveling plate left 26L with respect to the first leveling plate 11 It is comprised so that the connection of (1st leveling board right 26R) may be cancelled | released.

  When the second leveling plate left 28L (second leveling plate right 28R) moves to the working position with respect to the second leveling plate 12, the second rotation regulating mechanism 34 moves to the second leveling plate left 28L (second leveling plate right). 28R) is connected to the second leveling plate 12, and when the second leveling plate left 28L (second leveling plate right 28R) rotates from the working position to the storage position side, the second leveling plate left 28L with respect to the second leveling plate 12 It is comprised so that the connection of (2nd leveling board right 28R) may be cancelled | released.

  As shown in FIG. 2 (rear view), the second leveling plate 12 is moved up and down between the upper position of the shield cover 10 at the center in the left-right direction of the work machine body 2 and the upper surface of the second leveling plate 12. A link mechanism 40 is provided in conjunction with the.

  The link mechanism 40 will be described with reference to FIGS. As shown in FIG. 3 and FIG. 4 (plan view), the link mechanism 40 has a front end portion on a pair of support plates 35 disposed at a predetermined interval in the gear box width direction on the rear side of the gear box 6. Is pivotably connected to the first arm portion 41 extending rearward, and the upper end portion is pivotally connected to the rear end portion of the first arm portion 41 and the lower end portion is located above the second leveling plate 12. It has the 2nd arm part 42 connected so that rotation was possible. The rotation fulcrum P (see FIG. 3) of the second arm portion 42 with respect to the second leveling plate 12 is from the rotation fulcrum O (see FIG. 3) of the second leveling plate 12 with respect to the first leveling plate 11. Is provided at an intermediate position in the front-rear direction. Therefore, when the second leveling plate 12 rotates in the vertical direction around the rotation fulcrum O, the lower end of the second arm portion 42 uses the line L connecting the rotation fulcrum O and the rotation fulcrum P as the rotation radius. By moving in the vertical direction, a locking pin 52 (described later) provided on the second arm portion 42 can be moved in the vertical direction.

  Between the link mechanism 40 and the support plate 35, there is a fixing mechanism 50 that can lock the rotation of the second leveling plate 12 with the second leveling plate 12 standing upward with respect to the first leveling plate 11. Is provided. As shown in FIGS. 3, 4, and 5 (rear view), the fixing mechanism 50 is connected to the pair of connecting plates 36 connected to the lower portions of the pair of support plates 35 provided on the work machine body 2. A pair of engaging plates 51 that are pivotally connected to each other and extend rearward, a locking pin 52 that is provided on the upper front side of the second arm portion 42 and protrudes in the width direction and is locked to the engaging plate 51; An electric hydraulic cylinder 53 having a rod-side end rotatably connected to the engagement plate 51 and a bottom-side end rotatably connected to the work machine body 2 (side surface of the top mast 4 in this embodiment); It has.

  On the rear side of the pair of connecting plates 36, there are provided shaft portions 36a that are rotatably supported between the pair of connecting plates 36, and a pair of engaging plates 51 are connected to both axial sides of the shaft portions 36a. Has been. For this reason, the pair of engagement plates 51 is rotatable in the vertical direction with the shaft portion 36a as the rotation center.

  On the rear side of the engagement plate 51, as shown in FIG. 3, a hook portion 51b having a locking hole 51a into which the locking pin 52 can be inserted and locked is formed. The locking hole portion 51a has an opening 51a1 that extends from the hook portion 51b to the rotation fulcrum side of the engagement plate 51 and the engagement plate 51 extends rearward, and the front side of the locking hole portion 51a opens upward. . The locking pin 52 is inserted / removed through the opening 51a1.

  As shown in FIGS. 3 and 4, the electric hydraulic cylinder 53 has a rod side end projecting from one of the pair of engagement plates 51 (on the left side in the drawing) in the middle in the longitudinal direction of the engagement plate 51. The bottom end of the electric hydraulic cylinder 53 is pivotally connected to a coupling pin 55 provided on the side surface of the top mast 4.

  When the electric hydraulic cylinder 53 is substantially fully extended, the pair of engagement plates 51 are arranged so that the opening 51a1 of the locking hole 51a faces upward with the pair of engagement plates 51 extended in a substantially horizontal direction. Rotate. Further, when the electric hydraulic cylinder 53 is reduced from the substantially fully extended state, the pair of engaging plates 51 are rotated upward, and the locking pins 52 are inserted into the locking holes 51a. With the rotation, the second arm portion 42 moves forward and upward, and the second leveling plate 12 rotates upward.

  Then, as shown in FIG. 6, when the electric hydraulic cylinder 53 is substantially fully contracted, the locking pin 52 is locked to the hook portion 51b, and the second leveling plate 12 stands upright. The rotation of the second leveling plate 12 with respect to the first leveling plate 11 is locked, and the rotation of the first leveling plate 11 in a posture extending obliquely downward with respect to the shield cover 10 is also locked. Accordingly, the shaving work machine 1 is in a posture capable of carrying out the earthing work.

  In the present embodiment, the engagement plate 51 is disposed on the work machine main body side and the locking pin 52 is disposed on the link mechanism side. However, of course, the locking pin 52 is disposed on the work machine main body side, and the engagement plate 51 is disposed on the link mechanism side. The structure which arrange | positions may be sufficient.

  Next, the operation of the scribing work machine 1 will be described with reference to FIG. 6 in the case of performing a digging work for moving the soil that has risen at the end of the farm field to the lower part of the farm field by the scribing work machine 1. When performing the earthing work, in addition to the case where the first leveling plate 11 of the work machine body 2 is used and the first leveling plate 11 of the work machine body 2, the first leveling plate right 26R of the work body right 20R and the work body At least one of the left ground left first leveling plate 26L may be used, but in the present embodiment, the case where only the first leveling plate 11 of the work implement body 2 is used will be described.

  When performing the earthing work, as shown in FIG. 6, the electric hydraulic cylinder 53 is substantially fully reduced, and the second leveling plate 12 is locked with respect to the first leveling plate 11 in an upright position. At the same time, the rotation of the first leveling plate 11 with respect to the shield cover 10 is locked. And after the lower end part of the 1st leveling board 11 is located on the soil S which raised, the shaving work machine 1 is made to drive | work.

  And if the shaving work machine 1 is made to travel forward, the soil S raised by the lower end of the first leveling plate 11 moves to the lower part of the farm field while being gathered. At the time of the earthing work, when the worker M who has boarded the traveling machine body 90 (see FIG. 1) looks back at the soil S that is raised from the back side, a part of the substitute working machine 1 (the main frame 3) If the shield cover 10 or the like is present, they interfere and the rear side cannot be visually observed. However, since the 2nd leveling board 12 is maintained in the posture which stood up, the tip part of the 2nd leveling board 12 is obstructed by a part (main frame 3, shield cover 10, etc.) of the shaving work machine 1. Can be visually observed.

  Therefore, when the soil S that has risen at the end of the field is brought close to the ground, the operator visually confirms the position of the tip of the second leveling plate 12 so that the lower end of the first leveling plate 11 with respect to the raised soil S can be obtained. The position can be predicted. For this reason, the amount of soil brought close by the first leveling board 11 can be predicted. Further, since the earth leveling work is performed by the first leveling board 11, and the second leveling board 12 is arranged in a posture standing upward on the rear side of the first leveling board 11, the earth leveling work is performed on the second leveling board 12 during the earthing work. There is no risk of contact with S. For this reason, since the earth pressure at the time of earthing work is not directly applied to the 2nd leveling board 12, there is no possibility that the 2nd leveling board 12 may change and break.

[Second Embodiment]
Next, a second embodiment of the substitute working machine 1 will be described with reference to FIGS. In the second embodiment, only differences from the first embodiment will be described, and the same reference numerals will be given to the same aspects as those in the first embodiment, and the description thereof will be omitted.

  As shown in FIG. 7, the fixing mechanism 60 of the substitute working machine 1 of the second embodiment includes an electric motor 62 attached to a fixing plate 61 provided on a side surface of the top mast 4 extending upward of the gear box 6, and The link member 63 is rotated by the rotation of the drive shaft of the electric motor 62, and the connecting arm portion 65 is rotatably connected between the distal end portion of the link member 63 and the distal end portion of the engagement plate 51. .

  The electric motor 62 is attached to the top mast 4 via a fixed plate 61 formed in a substantially rectangular shape in a side view. In addition to the electric motor 62, a reduction gear 64 and a link member 63 that transmit the power of the electric motor 62 to the link member 63 are rotatably provided on the fixed plate 61. The connecting arm portion 65 is inserted into the arm portion base end side 65 a rotatably connected to the tip end portion of the link member 63, and inserted into the arm portion base end side 65 a so as to protrude and connected to the engagement plate 51. And an arm portion distal end side 65b.

  The arm portion base end side 65a is formed in a cylindrical shape, the arm portion tip end side 65b is formed in a rod shape, the arm portion tip end side 65b is inserted into the arm portion base end side 65a, and the arm portion tip end side 65b is formed in the arm portion. It can project into the base end side 65a.

  The arm portion distal end side 65b is configured not to be removed from the arm portion proximal end side 65a, and a compression spring 66 is mounted on the upper portion of the arm portion distal end side 65b. The lower end portion of the compression spring 66 is provided so as to contact a spring seat 65b1 attached to the arm portion distal end side 65b, and the upper end portion thereof is provided to contact the lower end portion of the arm portion base end side 65a. The compression spring 66 keeps the arm portion distal end side 65b protruding from the arm portion proximal end side 65a with a predetermined length.

  When the electric motor 62 is driven, the fixing mechanism 60 moves the link member 63 to a position extending obliquely downward via the reduction gear 64 so that the engaging plate 51 is oriented substantially in the horizontal direction, and the locking pin 52 is moved. Pull out from the engagement plate 51 to make it unlocked. Accordingly, the first leveling plate 11 and the second leveling plate 12 can freely rotate, and the substitute working machine 1 enters a normal working state in which a normal substitute work can be performed.

  Further, as shown in FIG. 8, when the electric motor 62 is driven, the fixing mechanism moves the link member 63 to a position extending obliquely upward via the reduction gear 64 so that the engagement plate 51 faces upward. Thus, the locking pin 52 is locked to the engagement plate 51. Accordingly, the second leveling plate 12 is locked in rotation with respect to the first leveling plate 11 in a posture standing upward, and the rotation of the first leveling plate 11 is also locked. The ground leveling plate 11 is in a posture capable of performing the earthing work.

  In addition, when the rocking work machine 1 performs the earthing work, the fixing mechanism 60 causes an obstacle such as a stone to collide with the first leveling plate 11 and an overload acts on the first leveling plate 11. It acts on the connecting arm part 65 via the second arm part 42 and the locking pin 52 connected to the leveling plate 12. The overload acting on the connecting arm portion 65 acts in a direction to reduce the connecting arm portion 65 and is transmitted to the link member 63, the reduction gear 64, and the electric motor 62. For this reason, there exists a possibility that the link member 63 and the electric motor 62 may be damaged.

  However, since the compression spring 66 is attached to the connection arm portion 65 of the fixing mechanism 60 of the present application, when an overload acts on the connection arm portion 65, the arm portion distal end side 65b is opposed to the arm portion proximal end side 65a. At the same time, the compression spring 66 is contracted to absorb the overload energy. Accordingly, it is possible to prevent the link member 63 and the electric motor 62 from being damaged.

  In both of the above-described embodiments, the working body left 20L and the working body right 20R are provided on both sides of the working machine body 2 as an example in which the working body left 20L and the working body left 20R are foldable and unfoldable. It is also possible to use a substitute working machine provided with only the work machine main body 2 without the work body right 20R.

DESCRIPTION OF SYMBOLS 1 Oyster working machine 2 Working machine main body 10 Shield cover 11 1st leveling board 12 2nd leveling board 13 Tillage rotor 40 Link mechanism 50, 60 Fixing mechanism (fixing means)
51 engagement plate (engagement means)
52 Locking pin (locking means)

Claims (5)

An upper portion of the tilling rotor rotatably supported by the work machine body is covered with a shield cover, and a first ground leveling plate is provided at the rear end of the shield cover so as to be rotatable in the vertical direction. A grabber working machine in which a second leveling plate is provided at the rear end portion so as to be rotatable in the vertical direction,
The work implement body can be locked via a link mechanism in which the rotation of the second leveling plate is pivotally connected with the second leveling plate standing upward with respect to the first leveling plate. fixing means is provided Do,
The link mechanism has a first arm and a second arm,
The fixing means includes a first engagement member having an engagement concave portion, a second engagement member having an engagement convex portion, and a cylinder.
The first arm is pivotally connected to the second arm,
The second arm has the second engaging member,
The second arm is rotatably connected to the second leveling plate,
The cylinder is rotatably connected to the first engagement member,
The fixing means can lock the rotation of the link mechanism by the operation of the cylinder ,
When the rotation of the link mechanism is locked by the fixing means, the rotation of the second leveling plate with respect to the first leveling plate is locked in a posture in which the second leveling plate stands upward. Machine. An upper portion of the tilling rotor rotatably supported by the work machine body is covered with a shield cover, and a first ground leveling plate is provided at the rear end of the shield cover so as to be rotatable in the vertical direction. A grabber working machine in which a second leveling plate is provided at the rear end portion so as to be rotatable in the vertical direction,
The work implement main body locks the rotation of the second leveling plate through a link mechanism that is rotatably connected so that the second leveling plate stands upward with respect to the first leveling plate. Possible fixing means are provided,
The link mechanism has a first arm and a second arm,
The fixing means includes a first engagement member having an engagement recess, a second engagement member having an engagement projection, an electric motor, a connecting arm, and a link member.
The first arm is pivotally connected to the second arm,
The second arm has the second engaging member,
The second arm is rotatably connected to the second leveling plate,
The connection arm is rotatably connected to the first engagement member,
The fixing means can lock the rotation of the link mechanism by operating the electric motor,
When the rotation of the link mechanism is locked by the fixing means, the rotation of the second leveling plate with respect to the first leveling plate is locked in a posture in which the second leveling plate stands upward. Machine. When the rotation of the second leveling plate is locked in a posture in which the second leveling plate stands upward with respect to the first leveling plate, the fixing means rotates the first leveling plate with respect to the work implement body. Also lock
  The scribing work machine according to claim 1 or 2, characterized in that. The fixing means includes an engaging means provided in the work implement main body, and a locking means provided in the link mechanism and capable of locking the engaging means.
When the engagement means is locked and unlocking said locking means, according to claim 1, characterized in that the second ground leveling plate is fixed and unlocking with respect to the first ground leveling plate or puddling work machine according to 2. The connecting arm has a compression spring.
The scribing machine according to claim 2, wherein:

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