JP2019017284A - Agricultural machine - Google Patents

Abstract

To provide an agricultural machine secularly preventing soil from being stuck to side panels and achieving the long-term use of tilling claws.SOLUTION: The agricultural machine includes: a body that supports a rotary work part including a plurality of tilling claws and performing tilling work using a rotary shaft as a center; an apron rotationally supported by a rear end of the body. The body includes a lateral panel disposed at the end of the rotary work part, and a mudguard member fixed to the side panel. The mudguard member includes: a first part disposed between a tilling claw closest to the side panel out of the plurality of tilling claws, and the side panel; and a second part disposed from the side panel toward a second space that is upper than a first space where the tilling claw closest to the side panel passes when rotating.SELECTED DRAWING: Figure 3

Description

  The present invention relates to an agricultural machine. In particular, the present invention relates to an agricultural machine that is attached to the rear part of a traveling machine body and cultivates a farm field while advancing the traveling machine body while rotating a rotary working unit.

  Generally, a rotary work machine includes a frame that is connected to a traveling machine body, a work rotor that is pivotally supported by the frame and that rotates a plurality of tilling claws around the rotation shaft, and a shield cover that covers the work rotor. (Hereinafter referred to as “shield cover”) and an apron member that is pivotally supported with respect to the shield cover and is rotatable downward and up.

  On the other hand, when the tilling claw rotates, some soil may adhere to the tilling nail depending on the state of the soil (when the viscosity is high, soil containing water, etc.). Furthermore, a part of the soil adhering to the tilling nail may be scattered by the centrifugal force generated by the rotation and adhere to the side surface of the main body (sometimes referred to as a side plate). The soil adhering to the side plate remains on the side plate unless the operator scrapes it off. The soil adhering to the side plate for a long time gradually dries and becomes hard. Due to the contact with the hardened soil, the outer portion of the plurality of tilling claws closest to the side plate may be worn.

  For this reason, in order to prevent soil from adhering to the side plate, Patent Document 1 discloses that a stainless steel plate processed into a mirror surface is provided on the main body side plate.

JP 2001-275405 A

  However, even if a stainless steel plate processed into a mirror surface is used, the surface of the side plate gradually becomes rough due to contact with stones and other hard objects in daily tillage work, and the effect of preventing soil adhesion It may decrease. For this reason, there was a problem that the soil gradually adhered to the side plate, and as a result, the tilling nail was worn by contact with the hardened soil.

  Therefore, an object of the present invention is to provide an agricultural machine that can prevent soil from adhering to the side plate for a long period of time and can use the tilling nail for a long period of time.

  According to one embodiment of the present invention, a main body that supports a rotary working unit that has a plurality of tilling claws and performs a tilling operation around a rotation shaft, and an apron that is rotatably supported at the rear end of the main body The main body includes a side plate disposed at an end of the rotary working unit, and a soil retaining member fixed to the side plate, and the soil retaining member is a tillage closest to the side plate among the plurality of tilling claws. A first portion disposed between the claw and the side plate, and a second portion disposed toward the second space above the first space that passes when the tilling claw closest to the side plate rotates from the side plate. A farm machine is provided.

  In the agricultural machine, the earth retaining member may have a shape along the outer shape of the first space.

  In the agricultural machine, the apron is disposed forward from the side surface of the apron and includes an apron shield having a plane parallel to the side plate of the main body. When the apron is rotated, the apron shield is attached to the inner wall of the side plate. Rotate along and may be close to the side plate.

  In the agricultural machine, the apron may be rotated when the agricultural machine is turned, and the apron shield may be rotated in accordance with the movement of the apron.

  In the agricultural machine, the earth retaining member may be disposed behind the rotation shaft with respect to the traveling direction.

  In the farm work machine, the earth retaining member may be arranged to be inclined obliquely forward with respect to the traveling direction.

  In the agricultural machine, the earth retaining member may include an inorganic material.

  In the farm work machine, a part of the earth retaining member may have a portion in contact with the tilling claw closest to the side plate.

  In the agricultural machine, the earth retaining member may include an elastic material.

  In the agricultural machine, the earth retaining member may be detachable.

  According to an embodiment of the present invention, a main body that rotatably supports a rotary working portion that has a plurality of tilling claws and that performs a tilling operation around a rotation shaft, and is rotatably supported on a rear end portion of the main body. The main body includes a side plate disposed at an end of the rotary working unit, and an earth retaining member fixed to the side plate, and the apron is disposed from the side toward the front, There is provided an agricultural machine that includes an apron shield having a plane parallel to the side plate, and the earth retaining member is disposed between the side plate and the tilling claw closest to the side plate among the plurality of tilling claws.

  ADVANTAGE OF THE INVENTION According to this invention, it can prevent long-term that soil adheres to a side plate, and can provide the agricultural machine which can use a tilling nail for a long term.

It is a top view of the agricultural working machine which concerns on one Embodiment of this invention. It is a side view of the agricultural working machine which concerns on one Embodiment of this invention. It is the perspective view which simplified the main-body edge part of the agricultural working machine which concerns on one Embodiment of this invention. It is the rear view which simplified the main-body edge part of the agricultural working machine which concerns on one Embodiment of this invention. It is the rear view which simplified the main-body edge part of the agricultural working machine which concerns on one Embodiment of this invention. It is the side view which simplified the main-body edge part of the agricultural machine based on one Embodiment of this invention. It is the side view which simplified the main-body edge part of the agricultural working machine at the time of tilling work and turning at the time of one Embodiment of this invention. It is the modification of the side view which simplified the main-body edge part of the agricultural working machine which concerns on one Embodiment of this invention. It is the modification of the side view which simplified the main-body edge part of the agricultural working machine which concerns on one Embodiment of this invention. It is the modification of the side view which simplified the main-body edge part of the agricultural working machine which concerns on one Embodiment of this invention. It is the perspective view which simplified the main-body edge part of the agricultural working machine which concerns on one Embodiment of this invention. It is the rear view which simplified the main-body edge part of the agricultural working machine of a prior art example. It is the side view which simplified the main-body edge part of the agricultural machine of the prior art example.

  Hereinafter, an embodiment of an agricultural machine according to the present invention will be described with reference to the drawings. However, the agricultural machine of the present invention can be implemented in many different modes, and is not construed as being limited to the description of the examples shown below. Note that in the drawings referred to in this embodiment, the same portions or portions having similar functions are denoted by the same reference numerals, and repetitive description thereof is omitted. In addition, for convenience of explanation, the description will be made using the terms front (front side) or rear (rear side), but the front (front side) indicates the direction of the traveling machine body 300 that pulls the agricultural machine 100 relative to the agricultural machine 100, and the rear ( (Rear side) shows the direction of the agricultural machine 100 with respect to the traveling machine body 300.

<First Embodiment>
(1-1. Configuration of agricultural machine)
FIG. 1 is a top view of a farm work machine 100 (sometimes referred to as a rotary work machine or a tiller) according to the first embodiment of the present invention. FIG. 2 is a side view of the agricultural machine 100. As shown in FIG. 1, the agricultural machine 100 according to the present embodiment includes a main body 101 (including a main frame 110 and a shield cover 120), a rotary working unit 102, an apron 130, and the like.

  The main frame 110 of the main body 101 is attached (connected) to the rear portion of the traveling machine body 300 such as a tractor. The main frame 110 is cylindrical and has a power transmission shaft inside. A gear box 125 is attached to the main frame 110.

  Rotational power from a traveling machine body 300 such as a tractor traveling forward is transmitted to a PIC (Power Input Connection) shaft 106 of the agricultural machine 100, a gear (not shown) in the gear box 125, and a shaft (not shown) on the left side of the main frame 110. The Further, this rotational power is transmitted to the rotary shaft 104 of the rotary working unit 102 by the chain transmission mechanism in the chain case 105 while changing the direction to the left in the traveling direction of the agricultural work machine 100. Then, the agricultural working machine 100 proceeds with the forward traveling of the traveling machine body 300 while rotating the rotary working unit 102 to plow the farm field.

  The rotary working unit 102 includes a rotation shaft 104 of the main body 101 and a plurality of tilling claws 103 provided on the rotation shaft 104. The rotary working unit 102 is supported by the main body 101. As shown in FIG. 2, the plurality of tilling claws 103 includes a vertical blade portion 103 </ b> A extending perpendicularly to the rotation shaft 104 from the attachment portion and a horizontal blade portion 103 </ b> B bent to the right or left with respect to the traveling direction. Have. In the plurality of tilling claws 103, the region (width) in which each tilling claw 103 digs up soil overlaps with the adjacent tilling claws 103. The rotary working unit 102 rotates so as to scoop up the soil from the rear in the traveling direction to the front.

  The shield cover 120 is disposed so as to cover the upper part of the rotary working unit 102. A side plate 121 is provided on the side surface of the shield cover 120. In this case, it can be said that the side plate 121 is disposed at the end of the rotary working unit 102. 3 to 6 described later, the side plate 121 on the right side with respect to the traveling direction is illustrated.

  The apron 130 is supported so as to be able to descend and flip up about a pivot fulcrum 140 fixed to the rear end of the shield cover 120. The apron 130 is disposed behind the rotary working unit 102. Since the center of gravity of the apron 130 is behind the rotation fulcrum 140, the apron 130 tends to descend due to its own weight.

  A lock mechanism 150 is provided between a pedestal 111 and an apron 130 provided on the main frame 110. The lock mechanism 150 functions to press the apron 130 and the leveling plate 131 against the field with a constant pressure when the apron 130 is in the lowered state. The magnitude of the force acting on the lock mechanism 150 can be adjusted by the operator's operation. Moreover, the lock mechanism 150 is locked according to each work state.

  A leveling plate 131 made of stainless steel or the like is welded to the tip of the apron 130. The leveling plate 131 is configured to draw a loop from the inside of the apron 130 toward the outside. The ground leveling plate 131 flattens the field excavated by the rotary working unit 102. The apron 130 and the leveling plate 131 are collectively referred to as an apron member.

  In addition, movable extended leveling plates 133 are provided at both ends of the leveling plate 131 (see FIG. 1). By opening the extended leveling plate 133, it is possible to level the wide range with the leveling plate 131.

  On the other hand, the apron 130 is provided with an apron shield 132. The apron shield 132 is disposed from the side surface of the apron 130 toward the front (traveling direction). In FIG. 2, the apron shield 132 on the right side with respect to the traveling direction is shown. The apron shield 132 has a surface parallel to the side plate 121. At this time, the apron shield 132 is provided on the inner side (cultivation claw 103 side) than the inner wall of the side plate 121. The structure of the edge part of the agricultural working machine 100 including the apron shield 132 will be described below.

(1-2. Configuration of the end of the agricultural machine)
FIG. 3 is a perspective view showing the end portion 100 </ b> A of the agricultural machine 100 in a simplified manner. 4 and 5 are rear views showing the end portion 100A of the agricultural working machine 100 in a simplified manner. FIG. 6 is a side view showing the end portion 100 </ b> A of the agricultural working machine 100 in a simplified manner.

  As shown in FIG. 3, a soil retaining member 160 is disposed at the end portion 100 </ b> A of the farm work machine 100 in addition to the tilling claws 103, the side plate 121, the apron 130, and the apron shield 132. 3 and 4 show the tilling claw 103-1 closest to the side plate 121 among the plurality of tilling claws 103.

  Further, as shown in FIG. 3, the earth retaining member 160 is disposed obliquely forward with respect to the traveling direction L. At this time, the earth retaining member 160 is gradually separated from the side plate 121 in the traveling direction L from the fixed portion 160F, and is most distant from the distal end portion 160T. This prevents an excessive load from being applied when the soil adhering to the tilling nail 103 comes into contact with the earth retaining member 160 as will be described later. In the above, the earth retaining member 160 excluding the fixing portion 160F may not be planar. For example, the earth retaining member 160 may have a bent portion other than the fixed portion 160F, or may have a curved surface shape.

  As shown in FIGS. 4 and 5, the earth retaining member 160 has a first portion 160A and a second portion 160B. 160 A of 1st parts are the parts arrange | positioned between the side plate 121 and the tilling nail | claw 103-1 (specifically surface 103-1C (refer FIG. 4) by the side plate 121 side among the cultivation claw 103-1). Say.

  The second portion 160B is shown as follows. As shown in FIGS. 5 and 6, when the tilling claw 103-1 rotates, it passes through the first space S1. At this time, a space above the first space S1 (or outside the rotation shaft 104) is defined as a second space S2. The second portion 160B refers to a portion that extends from the side plate 121 toward the second space S2.

  As shown in FIGS. 4 to 6, the earth retaining member 160 has the first portion 160 </ b> A and the second portion 160 </ b> B, so that even when the soil is released from the tilling claws 103-1, the earth retaining member 160 is stopped. be able to.

  Moreover, as shown in FIGS. 4 and 5, in this example, the first portion 160 </ b> A is arranged with a small gap between the vertical blade portion 103-1 </ b> A of the tilling claw 103-1 and the side plate 121. Yes. Further, the second portion 160B has a shape along the shape F1 outside the first space S1, and is arranged with a small gap. From the above, the earth retaining member 160 is disposed in the vicinity of the rotation trajectory (that is, the first space S1) through which the tilling claw 103-1 passes. Thereby, it can prevent more efficiently that the soil laid by the tilling nail 103-1 adheres to the front side of the advancing direction rather than the earth retaining member 160 among the side plates 121. It can be said that the second portion 160B reflects the shape of the surface 103-1C on the side plate 121 side of the tilling claw 103-1 when the tilling claw 103-1 comes close to the earth retaining member 160.

  In addition, as shown in FIG. 6, the earth retaining member 160 is disposed on the rear upper portion of the rotation shaft 104 with respect to the traveling direction L. At this time, the earth retaining member 160 is arranged in a direction (D1 direction) centered on the rotation shaft 104 and rotated clockwise from a direction perpendicular to the ground. As a result, although details will be described later, the soil attached to the side plate 121 by the rotation of the apron shield 132 is easily scraped off.

  The earth retaining member 160 is fixed to the side plate 121 with bolts. That is, it can be said that the earth retaining member 160 is detachable. Since the earth retaining member 160 is detachable, the earth retaining member 160 can be appropriately replaced even when worn. Therefore, it can be said that it is an agricultural machine with high maintainability.

  The material of the earth retaining member 160 is not limited, but an inorganic material is used, for example. Specifically, a material such as a stainless steel plate or ceramics is used for the earth retaining member 160. Moreover, organic materials, such as resin and wood, can also be used, and the composite material which combined the inorganic material and the organic material suitably can also be used. In addition, the earth retaining member 160 may be appropriately subjected to surface treatment. For the surface treatment in this case, blast treatment, heat treatment, and plating treatment are used. By performing the surface treatment, the durability of the earth retaining member 160 can be improved.

  From the above, the soil retaining member 160 has a function of removing soil adhering to the tilling claw 103. Further, the earth retaining member 160 has a function of preventing dirt from adhering to the front side of the earth retaining member 160 in the traveling direction L of the side plate 121.

(1-3. Removal of soil adhering to the side plate)
Below, the removal work of the soil adhering to the side plate 121 is shown. FIG. 7A is a side view of the agricultural working machine 100 at the time of tillage work. FIG. 7B is a side view of the agricultural working machine 100 at the time of turning.

  As shown in FIG. 7A, the apron 130 is fixed in a state where it is lifted up during the tilling work. At this time, the apron shield 132 prevents soil from being released from the first region A <b> 1, which is a gap between the apron 130 and the side plate 121, to the outside of the main body 101. On the other hand, in the second region A2, the soil released by the tilling claws 103-1 is stopped and attached to the earth retaining member 160. Alternatively, the soil attached to the tilling claw 103-1 is scraped off and attached to the second area A <b> 2 by the earth retaining member 160.

  The agricultural work machine 100 performs a swiveling work to cultivate the adjacent soil after the agricultural field is cultivated linearly. At this time, as shown in FIG. 7B, the apron 130 rotates downward (R2) about the rotation fulcrum 140 in the clockwise direction than during the tillage work. This turning operation may be performed in combination with the lock mechanism 150 (see FIGS. 1 and 2), for example, by an operator operating a button on a remote controller provided on the side of the driver's seat of the traveling machine body 300. Alternatively, in this turning operation, the operator may turn the apron 130 manually. Alternatively, this turning operation may be performed by automatic control of the farm work machine 100. As described above, the apron shield 132 is fixed to the apron 130. Further, the apron shield 132 is provided on the inner side (cultivation claw 103 side) than the inner wall of the side plate 121. The apron shield 132 has a surface parallel to the side plate 121.

  In the above description, the apron shield 132 rotates along the inner wall of the side plate 121 in accordance with the rotation of the apron 130. Further, when the apron shield 132 is rotated in the R2 direction, the apron shield 132 is rotated to the overlapping portion P1 in a part of the earth retaining member 160. At this time, the apron shield 132 and the side plate 121 are close to each other. Thereby, the soil adhering to the side plate 121 is scraped off by the turning operation of the apron shield 132. In the above description, the apron shield 132 and the earth retaining member 160 may be adjacent to each other with a certain distance between the earth retaining member 160 and the side plate 121.

  Here, a rear view and a side view of the end of the agricultural machine in the conventional configuration are shown in FIGS. In the case of the conventional configuration, a space S <b> 11 exists between the rotating tillage claw 103-1 and the side plate 121. Therefore, the soil released by the tilling claws 103-1 during tillage may adhere to the region A11 of the side plate 121 through the space S11. When soil adheres to the area A11, it is not easy to drop the soil.

  However, by using one embodiment of the present invention, the earth retaining member 160 is provided. For this reason, it is suppressed that soil adheres to field A11 as mentioned above. Moreover, the soil adhering to the side plate 121 is scraped off by the rotation of the apron shield 132. Furthermore, since the agricultural working machine 100 performs a turning operation as appropriate, the turning operation of the apron 130 and the apron shield 132 is repeatedly performed. Therefore, the soil adhering to the side plate 121 is repeatedly removed by the apron shield 132. Thus, the surface 103-1C on the side plate 121 side of the vertical blade portion 103-1A and the horizontal blade portion 103-1B of the tilling claw 103-1 is prevented from being worn. That is, by using one embodiment of the present invention, it is possible to provide a farm work machine that can prevent soil from adhering to the side plate for a long time and can use the tilling nail for a long time.

  In the above description, the example in which the earth retaining member 160 is disposed on the rear upper portion of the rotation shaft 104 with respect to the traveling direction L is shown, but the present invention is not limited thereto. 8, 9, and 10 are side views showing the end portion 100 </ b> A of the agricultural working machine 100 in a simplified manner. As shown in FIG. 8, the earth retaining member 160-1 may be provided in front of the rotating shaft 104 of the rotary working unit 102 with respect to the traveling direction L. Alternatively, as shown in FIG. 9, the earth retaining member 160-2 may be provided above the rotating shaft 104 of the rotary working unit 102. Alternatively, as shown in FIG. 10, the earth retaining member 160-3 may be provided at the same height from the rotary shaft 104 of the rotary working unit 102 and the ground. The position, angle and shape of the earth retaining member 160 may be appropriately selected according to the direction in which the soil scattered by the tilling claws 103-1 is scattered. At this time, the shape of the apron shield 132 may be changed as appropriate.

  Moreover, in this embodiment, although the apron shield 132 showed the example rotated to the part P1 which overlaps in a part of the earth retaining member 160, it is not limited to this. Prior to overlapping with the earth retaining member 160, the rotation of the apron shield 132 may be restrained. The rotation range of the apron shield 132 may be changed as appropriate depending on the shape of the apron shield 132.

  Moreover, in this embodiment, even if the earth retaining member 160 is extended and arrange | positioned to the cultivation nail | claw (for example, the cultivation nail 103-2 shown in FIG. 1) inside the cultivation nail 103-1 nearest to the side plate 121, it is arrange | positioned. Good. Thereby, the earth retaining effect can be further enhanced.

Second Embodiment
Hereinafter, agricultural machines having different configurations will be described with reference to the drawings. In addition, about the part similar to the structure shown in 1st Embodiment, the description is used.

  FIG. 11 is a perspective view schematically showing the end 100-1A of the agricultural machine 100-1. The tilling claw 103-1, the shield cover 120, the side plate 121, the apron 130, the apron shield 132, and the earth retaining member 161 are disposed at the end portion 100-1A of the agricultural machine 100-1.

  The earth retaining member 161 has the same function as the earth retaining member 160. On the other hand, the earth retaining member 161 includes an elastic member. For example, a plate-like rubber member is disposed as the earth retaining member 161. At this time, the earth retaining member 161 may have a portion in contact with the tilling claw 103-1 during the tilling work. In the above, since the earth retaining member 161 has elasticity, it is possible to remove the soil attached to the tilling claw 103-1, while suppressing the load applied to the tilling claw 103-1. Note that the earth retaining member 161 may be arranged not only from the side plate 121 but also from the side plate 121 toward the shield cover 120. At this time, the earth retaining member 161 vibrates by coming into contact with the rotating tilling claw 103-1, or the soil that has been dredged by the tilling claw 103-1. Thereby, the soil adhering to the earth retaining member 161 itself can be efficiently dropped by vibration.

  A plurality of earth retaining members 161 may be arranged. For example, as shown in FIG. 11, three earth retaining members 161 are arranged. At this time, the earth retaining member 161 (earth retaining member 161-1) closest to the apron shield 132 is subjected to earth retaining, and another earth retaining member 161 (earth retaining member 161- disposed on the traveling direction L side). 2 and the earth retaining member 161-3) can effectively prevent soil from adhering to the front of the side plate 121 and the inner surface of the shield cover 120.

(Modification 1)
In 1st Embodiment and 2nd Embodiment of this invention, although the rotary work machine was demonstrated as an example of a farm work machine, it is not limited to this. The farm working machine according to the present invention may be a substitute working machine, or may be a farm working machine other than a rotary working machine or a substitute working machine.

(Modification 2)
In 1st Embodiment of this invention, although the earth retaining member 160 showed the example currently fixed to the side plate 121 with the volt | bolt, it is not limited to this. The earth retaining member 160 may be disposed by being welded to the side plate 121. Thereby, adhesion of the soil near the bolt for fixation is suppressed.

(Modification 3)
In 1st Embodiment, although the earth retaining member 160 showed the example which has flat plate shape, it is not limited to this. The earth retaining member 160 may have a block shape or a frame shape. What is necessary is just to select the shape of the earth retaining member 160 according to a working environment etc. suitably.

  DESCRIPTION OF SYMBOLS 100 ... Agricultural working machine, 100A ... End part, 101 ... Main body, 102 ... Rotary working part, 103, 103-1 ... Cultivation nail, 103-1C ... Surface, 103A, 103 -1A ... Vertical blade portion, 103B, 103-1B ... Horizontal blade portion, 104 ... Rotating shaft, 105 ... Chain case, 106 ... PIC shaft, 110 ... Main frame, 111 ... Pedestal, 120 ... Shield cover, 121 ... Side plate, 125 ... Gearbox, 130 ... Apron, 131 ... Slope, 132 ... Apron shield, 133 ... Extension Leveling plate, 140 ... rotating fulcrum, 150 ... lock mechanism, 160 ... earth retaining member, 161 ... earth retaining member, 300 ... traveling body, A1 ... first region, A11 ... Area, A2 ... No. Region, L · · · traveling direction, S1 · · · first space, S11 · · · space, S2 · · · second space

Claims (11)

A main body that has a plurality of tilling claws and supports a rotary working portion that performs tilling work around the rotation axis;
An apron rotatably supported at the rear end of the main body,
Including
The main body includes a side plate disposed at an end of the rotary working unit, and a soil retaining member fixed to the side plate,
The earth retaining member is
The first portion that is disposed between the side plate and the first portion disposed between the side plate and the first portion that is closest to the side plate rotates from the side plate to the first plate. And a second portion arranged toward the second space above the space. The earth retaining member has a shape along the outer shape of the first space,
The agricultural machine according to claim 1. The apron includes an apron shield that is disposed forward from a side surface of the apron and has a plane parallel to the side plate of the main body.
When the apron is rotated, the apron shield is rotated along the inner wall of the side plate and close to the side plate.
The agricultural machine according to claim 1 or 2. The apron rotates when the farming machine rotates, and the apron shield rotates in accordance with the movement of the apron.
The agricultural machine according to claim 3. The earth retaining member is disposed behind the rotating shaft with respect to the traveling direction.
The agricultural machine according to any one of claims 1 to 4. The earth retaining member is disposed obliquely forward with respect to the traveling direction.
The agricultural machine according to any one of claims 1 to 5. The earth retaining member includes an inorganic material,
The agricultural machine according to any one of claims 1 to 6. A part of the earth retaining member has a portion in contact with a tilling claw closest to the side plate,
The agricultural machine according to any one of claims 1 to 6. The earth retaining member includes an elastic material,
The agricultural machine according to claim 8. The earth retaining member is detachable,
The agricultural machine according to any one of claims 1 to 9. A main body that rotatably supports a rotary working unit that has a plurality of tilling claws and performs a tilling work around the rotation axis;
An apron rotatably supported at the rear end of the main body,
Including
The main body includes a side plate disposed at an end of the rotary working unit, and an earth retaining member fixed to the side plate,
The apron includes an apron shield that is disposed from the side toward the front and has a plane parallel to the side plate of the main body,
The earth retaining member is a farm working machine arranged between a tilling claw closest to a side plate among the plurality of tilling claws and the side plate.

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