JP2012187027A - Apron member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an apron member of rotary working machine for easily attaching and detaching a ground-leveling member in order to prevent adhesion of earth and sand to an apron body part.SOLUTION: The apron member 1 includes: the apron body part 3 that is vertically rotatably connected to a shield cover body part 2 for covering the upper side of a working rotor 5 and covers the rear side of the working rotor 5; the ground-leveling member 4 that is arranged at the side of the working rotor 5 of the apron body part 3 and brought into contact with plowing ground to level the ground; and a fifth cover material 21e that is arranged at the side of the working rotor 5 of the apron body part 3 and arranged closer to the side of the working rotor 5 than the ground-leveling member 4. The ground-leveling member 4 is connected to the apron body part 3 by a second connection part 103 and is attached to and detached from the apron body part 3. A fifth free end part 121e being at the end part of the opposite side position in the rear side direction of the fifth cover material 21e is positioned at a position between the second connection part 103 and the working rotor 5.

Description

  The present invention relates to an apron member that is mounted at a rear portion of a tractor so as to be movable up and down and is provided at a rear side position of a work rotor and leveling a tilling ground.

In a rotary working machine equipped with a working rotor with multiple claws such as a tilling claw projecting around the rotary shaft, such as a tilling work machine, a straw or the like is skimmed into the rear while stirring and reversing the clot with the claws. It is necessary to level the surface with a leveling board (apron).
In addition, it is necessary to improve the tillage performance (especially crushed and flat) with such a rotary working machine.
In order to satisfy this requirement, the shield cover main body is fixed above the work rotor.
Here, the shield cover main body portion extends in the width direction of the rotary working machine, and is supported by a transmission frame that transmits power to the rotary shaft and a support frame that is continuous with the transmission frame across the gear box.

When the inner peripheral surface of the shield cover main body directly faces the rotary shaft, earth and sand adhere to the inner peripheral surface (surface on the working rotor side) of the shield cover main body.
And this adhering earth and sand becomes resistance of the nail | claw which rotates, and will cause the problem of reducing work efficiency.
Therefore, in Patent Document 1 and Patent Document 2, a plate for preventing adhesion of earth and sand is fixed to the inner peripheral surface of the shield cover main body portion for the purpose of preventing adhesion and accumulation of earth and sand to the inner peripheral surface of the shield cover main body portion. Techniques to do this are disclosed.

The adhesion destination of the earth and sand that the claw jumps up with the rotation of the rotary shaft is determined by the rotation direction of the claw (rotary shaft).
For example, when the claw rotates relative to the cultivation ground from the front to the rear in the direction of travel (down cut), the claw scoops up the earth from the front to the rear, so the earth is behind the shield cover body. It often adheres to.

  Further, Patent Document 3 discloses disposing a soil repellent material and removing the earth and sand adhering to the soil repellent material by vibrating the soil repellent material.

  Furthermore, Patent Document 4 discloses a technique for preventing adhesion of earth and sand to the apron main body by fixing a stainless steel plate to the apron main body by welding.

JP-A-11-9002 No. 8-3205 JP 2010-99035 A Japanese Patent Laid-Open No. 7-23604

When an apron member is connected to the rear side of the shield cover main body, there is a situation that a large amount of earth and sand easily adheres to the apron member.
However, the techniques of Patent Document 1, Patent Document 2 and Patent Document 3 can improve the adhesion of earth and sand to the shield cover main body, but cannot be effectively prevented from adhering to the apron main body. It was.
In addition, the apron member has the role of leveling the cultivated ground, and if the apron member is scratched and uneven, the leveling cannot be made clean. There are circumstances that are easily scratched.
In the method of Patent Document 4, since the stainless steel plate is fixed to the apron main body by welding, there is a problem that even if the stainless steel plate is damaged, it cannot be easily replaced.

  An object of the present invention is to provide an apron member of a rotary working machine in which a leveling member for preventing adhesion of earth and sand to an apron main body portion can be easily attached and detached.

  The apron member of the present invention is connected to a shield cover main body that covers the upper side of the work rotor so as to be pivotable up and down and covers the rear side of the work rotor, and the work rotor side of the apron main body A leveling member arranged in contact with the cultivated ground and leveled, and a cover material arranged on the working rotor side of the apron main body part and arranged on the working rotor side than the leveling member, The leveling member is joined to the apron main body portion by a joint portion and is detachably formed with respect to the apron main body portion, and the cover is disposed at a position between the joint portion and the work rotor. A free end which is an end in the rear direction of the material is located.

  Preferably, the free end portion of the cover material is formed in parallel with the leveling member, and the free end portion and the leveling member are formed with a certain amount of space therebetween.

  Preferably, the cover member is joined in a both-sided manner by the joining means on the shield cover main body side and the joining means on the leveling member side.

  Preferably, the leveling member-side joining means is positioned in the vicinity of the leveling member-side joining portion of the leveling member on the shield cover body side, and the leveling member is joined to the leveling member and the apron body by a method other than engagement. The part is joined.

  The joining means on the shield cover main body side also joins other cover materials other than the cover material, and the front end of the other cover material extends to the shield cover main body as a free end.

  Preferably, the cover material is formed of a material having high elasticity.

  ADVANTAGE OF THE INVENTION According to this invention, the apron member of the rotary working machine with which attachment or detachment of the leveling member for preventing adhesion of earth and sand to an apron main-body part can be provided easily.

It is an external view from the tractor side of the rotary working machine in which the apron member of embodiment of this invention is used. It is an external view from the opposite side to the tractor side of the rotary working machine in which the apron member of embodiment of this invention is used. It is an external view of a working rotor. It is sectional explanatory drawing which looked at the rotary working machine from the left direction. It is explanatory drawing which expanded the back end part of the apron member. It is explanatory drawing of 2nd Embodiment. It is explanatory drawing of 3rd Embodiment. It is explanatory drawing of 4th Embodiment. It is explanatory drawing of 5th Embodiment. It is explanatory drawing of 6th Embodiment.

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

  FIG. 1 is an external view from the tractor side of a rotary work machine 10 in which the apron member 1 according to the first embodiment of the present invention is used.

The rotary work machine 10 of FIG. 1 is pulled by a tractor (not shown).
The tractor is disposed at a front position in FIG. 1 and pulls the rotary work machine 10.
The rotary work machine 10 includes a top mast 11 connected to a three-point link hitch mechanism including a top link and a lower link at the rear portion of the tractor, and two link connecting portions 12, and the tractor of the tractor is connected via the three-point link hitch mechanism. It is attached to the rear part so that it can be raised and lowered.
The rotary work machine 10 includes a work rotor 5 and a shield cover main body 2 that covers the work rotor 5.
The shield cover body 2 is formed with a first slit 2a.

A gear box 13 having an input shaft 131 connected to the lower end portion of the top mast 11 from a PTO shaft of the tractor via a universal joint (not shown) is disposed.
A transmission frame 14 and a support frame 15 are installed from the gear box 13 in the width direction of the rotary work machine 10.
The power from the PTO shaft is transmitted to the input shaft 131 via the universal joint and input to the gear box 13.
The direction and the number of rotations are changed by the gear box 13 and transmitted to the transmission shaft inserted through the transmission frame 14.

A chain case 16 is fixed to the front end portion of the transmission frame 14 so as to hang down.
An end cover 17 facing the chain case 16 is fixed to the tip of the support frame 15.
The rotary shaft 6 of the work rotor 5 is installed between the chain case 16 and the end cover 17 so as to be rotatable about the axis. A chain is stretched between the transmission shaft and the rotary shaft 6, and the power of the transmission shaft is transmitted to the rotary shaft 6 through the chain.
A right side shield 18 </ b> R is disposed at a position in the rear side direction of the end cover 17.

Here, the tilling direction (direction in which the tractor is arranged) of the rotary work machine 10 is defined as the front side direction. The opposite direction is defined as the rear side direction.
And the upper direction in the working condition of the rotary work machine 10 is defined as the upper direction. The opposite direction is defined as the lower direction.
Then, when viewed from the rear side direction, the right hand side direction is defined as the right side direction, and the left hand side direction is defined as the left side direction.
In addition, the rotary work machine 10 has many symmetrical members, and those having the same role are given the same reference numerals, and R and L are given to the reference signs, so that the members at the right side position and the left side position members are separated. Distinguish. Here, although the member of both the right direction position and the left direction position exists, the member of the code | symbol which R or L is not provided means both.

Fig.2 (a) is an external view from the opposite side to the tractor side of the rotary working machine 10 in which the apron member 1 of embodiment of this invention is used.
Further, FIG. 2B is opposite to the tractor side of another rotary work machine 10 in which both side portions of the apron member 1 of the embodiment of the present invention are cut out in a substantially triangular shape and a detachable cover is provided at that portion. It is an external view from the side.

As shown in FIG. 2, an apron main body 3 that is connected to the shield cover main body 2 so as to be vertically rotatable is formed in the rear side direction of the shield cover main body 2.
The apron main body 3 is formed so as to cover the rear side direction of the work rotor 5. Moreover, the apron main-body part 3 has played the role which the edge part of the rear side contacts the cultivation ground, and leveled the cultivation ground.
Further, the apron body 3 is formed with a second slit 3a. Even if the second slit 3a is formed in a single through hole shape as shown in FIG. 2 (a), the second slit 3a is composed of a plurality of slits (windows) as shown in FIG. 2 (b). It may be formed.
And the leveling member 4 arrange | positioned at the work rotor 5 side of the apron main-body part 3 is exposed from this 2nd slit 3a.
Most of the leveling member 4 is disposed on the work rotor 5 side of the apron main body 3, but at the rear end position, the work rotor of the apron main body 3 from the work rotor 5 side of the apron main body 3. 5 is formed to wrap around to the opposite side.
The leveling member 4 is joined to the apron main body 3 by the second joint 103.
Here, the leveling member 4 and the apron main body 3 are collectively referred to as an apron member 1.

A left side shield 18 </ b> L integrated with the transmission frame 14 and the chain case 16 with bolts or the like is disposed at the left side position of the apron member 1.
The left side shield 18L is formed on the rear side of the chain case 16.
A right side shield 18 </ b> R integrated with the support frame 15 and the end cover 17 with bolts or the like is disposed at the right side position of the apron member 1.
The right side shield 18R is formed on the rear side of the end cover 17.

A left apron side plate 19 </ b> L that is integrated with the apron main body 3 with bolts or the like is disposed at the left side position of the apron main body 3.
Although not shown, a right apron side plate 19 </ b> R is also disposed at the right side position of the apron main body 3.
The left apron side plate 19L and the right apron side plate 19R are arranged on the inner side of the left side shield 18L and the right side shield 18R. Further, the left apron side plate 19L and the right apron side plate 19R are arranged in parallel with the left side shield 18L and the right side shield 18R.

  The apron side plate 19 and the side shield 18 are provided for the purpose of preventing the earth and sand cultivated by the work rotor 5 from jumping out to the right side and the left side from the cultivating width.

  FIG. 3 is an external view of the working rotor 5.

As shown in FIG. 3, the working rotor 5 is formed of a rotary shaft 6 and a claw 7 integrated with the rotary shaft 6 with bolts or the like.
A claw 7 such as a tilling claw is protruded from the outer periphery of the rotary shaft 6 at an appropriate interval in the circumferential direction. The nail 7 is mainly a nail, but if it has a function of stirring, reversing and scraping the soil on the cultivated ground, it also includes a nail for scraping or crushing.
3 is an external view from substantially the same direction as FIG.

FIG. 4 is a cross-sectional explanatory view of the rotary working machine 10 as viewed from the left side.
The working rotor 5 ′ in FIG. 4 is partially different from the working rotor 5 in FIGS. 1 and 3 in the method of attaching the tilling claws and the like. explain.

As shown in FIG. 4, the shield cover main body 2 that covers the rotation range of the claw 7 of the work rotor 5 and protects the rotary work machine 10 from earth and sand is arranged.
The shield cover body 2 includes a plurality of cover members 21 arranged in the circumferential direction.
The cover member 21 is arranged in the order of the first cover member 21a, the second cover member 21b, the third cover member 21c, the fourth cover member 21d, and the fifth cover member 21e from the tilling direction.
The first cover material 21a is joined to the shield cover body 2 by the first joining means 221a, the second cover material 21b is joined by the second joining means 221b, and the third cover material 21c is joined by the third joining means 221c.
The fourth cover material 21d is joined to the apron main body 3 by the fourth joining means 221d, and the fifth cover material 21e is joined by the fifth joining means 221e.
The fourth joining means 221d also joins the fifth cover material 21e.
Here, the first joining means 221a, the second joining means 221b, the third joining means 221c, the fourth joining means 221d, and the fifth joining means 221e may be fastening means such as bolts, or may be screws. It may be. Further, for example, a method of engaging by bending by an elastic force at the time of attachment and detachment and returning to the original after the attachment and detachment may be used.

The first cover member 21a has a first free end 121a in the front direction (downstream in the rotational direction of the working rotor 5) from the portion joined to the first joining means 221a.
The second cover member 21b has a second free end 121b in the front direction (downstream in the rotation direction of the working rotor 5) from the portion joined to the second joining means 221b.
The third cover member 21c has a third free end 121c in the front direction (downstream in the rotation direction of the work rotor 5) from the portion joined to the third joining means 221c.
The fourth cover member 21d has a fourth free end 121d in the front direction (downstream in the rotation direction of the working rotor 5) from the portion joined to the fourth joining means 221d.
The fifth cover member 21e has a fifth free end portion 121e in the direction opposite to the fourth bonding means 221d (rear side direction) with respect to the portion bonded to the fifth bonding means 221e.
And then. A second joint 103 for joining the leveling member 4 is provided at a position opposite to the work rotor 5 of the fifth free end 121e.
The first free end 121a, the second free end 121b, the third free end 121c, and the fourth free end 121d are vibrated by a rod or the like inserted into the first slit 2a.
In addition, the first free end 121a, the second free end 121b, the third free end 121c, and the fourth free end 121d may be inserted into the rotation space of the work rotor 5 at their tips.
Therefore, when the work rotor 5 rotates, the claw 7 comes into contact with the first free end 121a, the second free end 121b, the third free end 121c, and the fourth free end 121d, and the first free end 121a, the second free end 121b, the third free end 121c, and the fourth free end 121d vibrate.
Due to this vibration, earth and sand adhered to the first cover material 21a, the second cover material 21b, the third cover material 21c, and the fourth cover material 21d are screened out.
By the way, the part (connection part 31) which connects between the shield cover main-body part 2 and the apron main-body part 3 has a structure which can be rotated, and earth and sand tends to adhere to the circumference | surroundings.
By covering the portion with the fourth cover member 21d, it becomes possible to prevent adhesion of earth and sand.
Further, the fourth free end portion 121d can be easily vibrated, and the earth and sand adhering to the fourth free end portion 121d can be screened off by this vibration.
Furthermore, similarly, the second free end portion 121b and the third joint portion are easily connected to the joint portion to which earth and sand easily adhere, for example, the first joint means 221a, the second joint means 221b, the third joint means 221c, and the second joint portion 103. By covering the free end 121c, the fourth free end 121d, and the fifth free end 121e, it becomes possible to prevent adhesion of earth and sand.

  The fifth cover member 21e is joined to the apron member 1 by both ends by the fourth joining means 221d at the front side position for joining the fourth cover material 21d and the fifth joining means 221e at the rear side position.

The cover member 21 is made of a material having high elastic force (having high elasticity) such as rubber, and is formed so as to easily vibrate and deform.
Thus, since the cover material 21 is easily vibrated and deformed, it is possible to easily remove the attached earth and sand.

The shield cover body 2 is formed with a first slit 2a (see also FIG. 1) in a through groove shape.
The first slit 2a includes a joining portion that joins the second cover member 21b to the shield cover body 2 with a bolt or the like, and a joining portion that joins the third cover member 21c to the shield cover body 2 with a bolt or the like. It is formed in the position between.
From the first slit 2a, the third cover member 21c and the like can be directly seen from the external position of the shield cover main body 2. Then, a rod or the like can be inserted into the first slit 2a to directly vibrate the third cover member 21c or the like.
And it is possible to remove the earth and sand adhering to the 3rd cover material 21c etc. by this vibration.

Here, the work rotor 5 ′ will be described. The claws 7 ′ are arranged on the mounting flange at intervals that do not interfere with each other in the axial direction of the rotary shaft 6 ′.
The claws 7 ′ adjacent to each other in the axial direction of the rotary shaft 6 ′ are arranged at an angle with respect to the center of the shaft, and the tip of the claw 7 ′ forms an arc shown in FIG. 4 in the entire rotary shaft 6 ′.
The working rotor 5 'is composed of a rotary shaft 6' and a claw 7 'protruding from the outer periphery thereof, and the working rotor 5 becomes a tilling rotor.

The apron main body 3 covering the rear side of the work rotor 5 is connected to the rear end side of the shield cover main body 2 so as to be rotatable around a connection portion 31 parallel to the axis of the transmission frame 14.
In order to keep the contact pressure with the cultivation ground of the apron main body 3 moderately on the surface side of the apron main body 3, that is, the surface opposite to the working rotor 5, the apron main body 3 is pressed and adjusted or flipped up. A compression rod 28 for holding is connected.

One end (upper end) of the coil spring 28a is locked to a locking portion 28b slidable in the axial direction.
The other end (lower end) of the coil spring 28a is movable in the axial direction of the compression rod 28, and is locked to a stopper 29 that can be stopped at an arbitrary position.
Here, the coil spring 28a is always in a state where it bears a compressive force.
The apron main body 3 is connected to the stopper 29, and the stopper 29 moves along the compression rod 28 as the apron main body 3 rotates.

As shown in FIG. 4, when the rotary work machine 10 is operated, the coil spring 28a is in a state of being locked to the locking portion 28b and the stopped stopper 29, and the locking portion 28b is pivoted according to the reaction force of the coil spring 28a. By sliding in the direction, the contact pressure between the apron main body 3 and the cultivated ground is adjusted.
When the apron main body 3 is flipped up, the stopper 29 is moved to the upper end side of the compression rod 28 and stopped, so that the apron main body 3 is kept in the flipped up state.

Note that the state of FIG. 4 shows a state in which the working rotor 5 is operated when the level of the lower end of the apron main body 3 is located, for example, about 200 mm above the level of the lowest point through which the claw 7 passes. .
The level of the lower end of the apron main body 3 can be freely set by adjusting the position of the locking portion 28c of the compression rod 28.

  FIG. 5 is an explanatory diagram in which the rear end portion of the apron member 1 is enlarged.

As shown in FIG. 5, the apron main body 3 is formed with a second slit 3a at a position in the rearward direction following the linear first straight portion 3g.
An apron main body wrapping portion 3b having a cross-sectional shape such as a cross section of a droplet is formed at a further rearward position of the second slit 3a.
The apron main body wrapping portion 3b has a substantially straight cross-sectional shape, and has a second straight portion 3c that contacts the tillage ground G and performs leveling.
Further, the apron main body winding portion 3b has a circular arc portion 3d that is continuous with the second linear portion 3c, has a circular curve shape, and changes the direction of about 225 °.
Further, the apron main body winding portion 3b includes a third straight portion 3e that is continuous with the arc portion 3d, has a linear shape, and extends to a position in contact with the second straight portion 3c.
In addition, the apron main body winding portion 3b is continuous with the third straight portion 3e, has a straight shape, extends parallel to the second straight portion 3c, and extends to the same position as the front end portion of the second straight portion 3c. It has a joint 3f.
Although it is not clear from the presence of the second slit 3a, the first straight portion 3g and the second straight portion 3c are continuous in a portion where the second slit 3a is not provided. The first straight line portion 3g and the second straight line portion 3c are assumed to be extended lines, and the first straight line portion 3g and the second straight line portion 3c and the second straight line portions 3c and The angle with the straight line portion 3c is about 135 °.

Since the apron main body wrapping portion 3b has a continuous cross-sectional shape like the cross section of the droplets in this way, the apron main body portion 3 has a rear end in the rear direction while having a structure that can be easily manufactured. It is possible to increase the strength of the part.
In addition, since the apron main body winding portion 3b is provided, the first joint portion 101 can be configured with a simple structure.
Further, the apron main body wrapping portion 3b is formed with the arc portion 3d, whereby work hardening occurs in the arc portion 3d, and the strength can be further increased by an easy method.

Here, the third straight part 3e and the joint part 3f are formed to have an obtuse angle.
Thus, since the 3rd linear part 3e and the junction part 3f are formed so that it may become an obtuse angle, it is possible to prevent earth and sand from entering into the connection part of the 3rd linear part 3e and the junction part 3f. Become.
In addition, since the third straight line portion 3e and the joint portion 3f are formed to have an obtuse angle in this way, it is possible to easily remove the adhering earth and sand.

The leveling member 4 includes, in order from the front direction position, a linear first leveling straight line portion 4a, a curved portion 4b, a substantially straight second leveling straight line portion 4c, and a leveling arc portion 4d having a curved shape. Have
Assuming each extension line of the straight first leveling straight line part 4a and the substantially straight second leveling straight line part 4c, at the intersection of the extension lines of the first leveling straight line part 4a and the second leveling straight line part 4c, The first leveling straight portion 4a and the second leveling straight portion 4c are at an angle of about 135 °.
And the curve part 4b has connected this 1st leveling straight line part 4a and the 2nd leveling straight line part 4c so that it may curve gently.
This curve is curved in parallel with the curve connecting the first straight line portion 3g and the second straight line portion 3c.
Further, the leveling arc 4d is curved in a circular shape, but the curve ends at about 180 °.
Moreover, the curve of the leveling arc portion 4d is curved in parallel with the curve of the arc portion 3d.

  The apron main body 3 and the leveling member 4 are joined together by a second joining portion 103 constituted by joining means such as a bolt. More specifically, the first straight part 3g and the first leveling straight part 4a are joined.

Moreover, the apron main-body part 3 and the leveling member 4 are in the engagement state in the 1st junction part 101 which is the edge part position of a rear side direction. Here, the term “engagement” refers to joining by being caught, not particularly by fastening bolts or the like.
More specifically, in the apron main body 3 and the leveling member 4, the arc portion 3d and the leveling arc portion 4d are engaged with each other by joining the same curve in parallel for a certain length.

The apron main body 3 and the leveling member 4 are integrated by the engagement at the first joint 101 and the joint at the second joint 103, and the second joint 103 is integrated only by bringing it into a non-joined state. Can be released.
By the way, the 2nd junction part 103 may be anything as long as it makes the apron main body part 3 and the leveling member 4 detachable (can be joined and released) by an easy method. They may be joined by joints (joining means) such as bolts and nuts. Further, for example, a method of engaging by bending by an elastic force at the time of attachment and detachment and returning to the original state after the attachment and detachment may be used (see FIGS. 6 to 7).

Further, the leveling member 4 can be directly observed from the external position of the apron main body 3 through the second slit 3a. Then, it is possible to directly oscillate the leveling member 4 by inserting a rod or the like into the second slit 3a.
And the earth and sand adhering to the leveling member 4 can be wiped off by this vibration.
Further, the portion where the second slit 3 a is formed corresponds to the curved portion 4 b portion of the leveling member 4. When the cultivated ground G is leveled, the curved portion 4b often becomes a portion that directly contacts the cultivated ground G. Therefore, a lot of earth and sand may adhere to the curved portion 4b of the leveling member 4.
Therefore, the second slit 3a is provided in a portion corresponding to the curved portion 4b where there is a high possibility that a large amount of the earth and sand is attached, and the earth and sand attached from the second slit 3a can be dropped by vibration. Yes.
Furthermore, since the apron main body 3 can be formed with a small amount of members by the amount of the second slit 3a, the apron main body 3 can be configured to be lightweight.

The apron main body 3 is a member that is subjected to complicated processing such as drilling, bending, and welding of the second slit 3a and the like. Therefore, it may be inconvenient in processing that the apron body 3 is made of a high-strength, low-adhesive material such as stainless steel.
Therefore, it is appropriate to provide a leveling member 4 separately from the apron main body 3 and to configure only the leveling member 4 from a high-strength member such as stainless steel.
Therefore, in this embodiment, the leveling member 4 is provided separately from the apron main body 3, and only the leveling member 4 is made of a high-strength member such as stainless steel, so that the ease of processing of the apron main body 3 is maintained. However, it is possible to make the leveling member 4 high in strength.

Moreover, the leveling member 4 is comprised in order of the 1st leveling straight part 4a, the curve part 4b, and the 2nd leveling linear part 4c, and it becomes possible to level the cultivated ground G smoothly by this. .
That is, the first leveling straight portion 4a or the curve portion 4b comes into contact with the cultivated ground G in a non-leveling state. And since the surface of the leveling member 4 turns to the back side gradually (continuously), it becomes possible for the earth and sand of the cultivation ground G to flow to the back side more smoothly.

The 5th cover material 21e has the 5th free end 121e extended in the back direction rather than the 5th junction means 221e.
The fifth free end 121e extends to a position that covers the second joint 103 from the work rotor 5 side.
In other words, the fifth free end portion 121 e extends from the work rotor 5 to a position where the second joint portion 103 cannot be seen, and is located at a position between the second joint portion 103 and the work rotor 5. A fifth free end 121e which is the rear end of the cover material 21e is located.
By having the fifth free end portion 121e, the second joint portion 103, which is present at a position where the earth and sand are relatively easily attached and has a shape to which the earth and sand are relatively easily attached, is covered with the fifth cover material 21e, Sediment adhesion can be prevented.
The fifth free end 121e and the first leveling straight portion 4a are formed substantially parallel to each other, and the fifth free end 121e and the first leveling straight portion 4a are separated from each other by a certain amount of space. Is formed.
Therefore, a space is accessible between the fifth free end 121e and the first leveling straight line portion 4a so that a tool or the like can approach from the rear side (downward direction).
From this space, a tool such as a spanner can be easily inserted into the bolt or the like of the second joint portion 103. And the joining in the 2nd junction part 103 can be easily cancelled | released with tools, such as this spanner. Since the joining at the second joining portion 103 can be easily released, the leveling member 4 can be attached and detached more easily.

As shown in FIG. 5, the fifth cover material 21 e is joined in a both-sided state by the fourth joining means 221 d and the fifth joining means 221 e, and thus is formed to be relatively longer than the other cover materials 21. The fifth cover member 21e is prevented from being displaced from a predetermined position.
Further, since the fifth joining means 221e is located in the vicinity of the second joining portion 103, the position of the fifth free end portion 121e is shifted, and the second joining portion 103 is exposed to the work rotor 5. There is no such thing.

The leveling member 4 is a member with which the earth and sand splashed by the work rotor 5 collide. Further, the leveling member 4 also has a role of leveling the tilled ground G to a uniform and clean surface.
Therefore, there is a high possibility that a lot of earth and sand will adhere to the leveling member 4. Therefore, it is desirable that the leveling member 4 has a lower adhesion to the earth than the apron main body 3.
Further, since the leveling member 4 has a role of leveling the tilled ground G to a uniform and clean surface, it is more preferable that the earth and sand have higher strength than the apron main body 3.
This is because deformation may occur due to the cultivated ground G during leveling. Moreover, many stones are contained in the earth and sand, and this dents the leveling member 4 and damages it. Furthermore, if the leveling member 4 is deformed, dented, scratched, or the like, unevenness or the like occurs on the leveling surface of the cultivated ground G, and the leveling surface is not clean.
Therefore, the leveling member 4 is made of stainless steel having high strength and low adhesion. Needless to say, stainless steel is only suitable, and other materials having such properties may be used.
Furthermore, if necessary, for example, fluorine coating or diamond-like coating may be further performed to satisfy these performances.
Further, the leveling member 4 may be made of a material that does not satisfy low adhesion or high strength, and for example, fluorine coating, diamond-like coating, or the like may be performed to satisfy these performances.

<Second Embodiment of the Present Invention>
FIG. 6 is an explanatory diagram of the second embodiment.

The second embodiment is basically the same as the first embodiment, and description thereof is omitted (the same applies to the following embodiments).
As shown in FIG. 6, the joining means is like a first locking member 103a in which the second joining portion 103 between the leveling member 4 and the apron main body 3 is bent by an elastic force at the time of attachment / detachment, and the bending is restored after the attachment / detachment. It may be composed of anything.

<Third Embodiment of the Present Invention>
FIG. 7 is an explanatory diagram of the third embodiment.

  As shown in FIG. 7, the joining means removes the second joining portion 103 between the leveling member 4 and the apron main body portion 3, and bends by an elastic force at the time of attachment / detachment, and the second locking member 103 b returns to its original state after attachment / detachment. May be provided at the front end of the leveling member 4.

<Fourth Embodiment of the Present Invention>
FIG. 8 is an explanatory diagram of the fourth embodiment.

As shown in FIG. 8, the joining means is the second joining portion 103 of the leveling member 4 and the apron main body 3 provided with a through hole in the apron main body 3, and the leveling member 4 formed in a cross-sectional Z shape in the through hole. The structure which inserts the front-end part 103c may be sufficient.
Further, in this configuration, as shown in FIG. 8, the rear end portion around which the leveling member 4 wraps is formed so as to be elastically deformable, and the apron main body portion 3 and the leveling member 4 may be joined by this elastic force. .

<Fifth Embodiment of the Present Invention>
FIG. 9 is an explanatory diagram of the fifth embodiment.

  As shown in FIG. 9, the joining means is the same as that of the first embodiment in the second joint portion 103 between the leveling member 4 and the apron main body portion 3, and the first joint portion 101 is provided with a through hole in the apron main body portion 3. The rear end portion of the leveling member 4 having a Z-shaped cross section may be provided in the through hole.

<Sixth Embodiment of the Present Invention>
FIG. 10 is an explanatory diagram of the sixth embodiment.

As shown in FIG. 10, the leveling member 4 in which the second bonding portion 103 between the leveling member 4 and the apron main body 3 is provided with a through hole in the apron main body 3 and the cross section is formed in a Z-shaped cross section. The front end portion 103c may be inserted.
Further, in this configuration, as shown in FIG. 10, the rear end portion around the leveling member 4 may be joined by a joining member such as a bolt and a nut.

<Effect of embodiment>
The apron member 1 of this embodiment is connected to a shield cover main body 2 that covers the upper side of the work rotor 5 so as to be pivotable up and down, and an apron main body 3 that covers the rear side of the work rotor 5 and an apron main body 3. Is disposed on the work rotor 5 side, and is disposed on the work rotor 5 side of the apron main body 3 and is disposed on the work rotor 5 side relative to the leveling member 4. The leveling member 4 is joined to the apron body 3 by the second joint 103 and is detachable from the apron body 3, and the second joint The fifth free end portion 121e, which is the end portion on the opposite side position in the rear side direction of the fifth cover member 21e, is located between the position 103 and the work rotor 5.
Since it comprised in this way, earth and sand adhere to the 2nd junction part 103 for exchanging the leveling member 4, and work does not become difficult when exchanging the leveling member 4.
Further, the second joint 103 is not corroded by earth and sand, and the work is not difficult when the leveling member 4 is replaced.

The fifth free end portion 121e of the fifth cover member 21e is formed in parallel with the leveling member 4, and the fifth free end portion 121e and the leveling member 4 are formed with a certain amount of space therebetween.
Since it has such a configuration, a tool such as a spanner can be easily inserted into the bolt or the like of the second joint portion 103 from this space. And the joining in the 2nd junction part 103 can be easily cancelled | released with tools, such as this spanner. Since the joining at the second joining portion 103 can be easily released, the leveling member 4 can be attached and detached more easily.

The fifth cover member 21e is joined in a both-sided manner by the fourth joining means 221d on the shield cover main body 2 side and the fifth joining means 221e on the leveling member 4 side.
Since it has such a configuration, it is possible to prevent the fifth cover member 21e, which is formed with a relatively longer overall length than the other cover members 21, from shifting from a predetermined position.

The fifth joining means 221e on the leveling member 4 side is located in the vicinity of the second joining portion 103 on the shield cover main body 2 side of the leveling member 4, and the second joining portion 103 is formed by a method other than engagement by the leveling member. 4 and the apron main body 3 are joined.
With such a configuration, the position of the fifth free end 121 e is not shifted, and the second joint 103 is not exposed to the work rotor 5.

The fourth joining means 221d on the shield cover body 2 side also joins the fourth cover member 21d other than the fifth cover member 21e, and the front end of the other fourth cover member 21d is the fourth free member. The end portion 121d extends to the shield cover main body 2 side.
Since it has such a structure, it can prevent that earth and sand adhere to the part (connection part 31) to which the shield cover main-body part 2 and the apron main-body part 3 are connected.
That is, the connecting portion (connecting portion 31) between the shield cover main body portion 2 and the apron main body portion 3 has a structure that can rotate, and earth and sand are likely to adhere to the periphery thereof. By covering the portion with the fourth cover member 21d, it becomes possible to prevent adhesion of earth and sand. The fourth free end 121d can be easily vibrated, and the earth and sand adhering to the fourth free end 121d can be screened off by this vibration.

The fifth cover material 21e is formed of a material having high elasticity.
Since it has such a structure, since the cover material 21 is easily vibrated and deformed, it is possible to easily remove the adhered earth and sand.

In the above description, the rotary work machine 10 has a configuration in which the first cover member 21a, the second cover member 21b, and the third cover member 21c are arranged in the shield cover body 2. However, the shield cover body 2 extends over the shield cover body 2. Rotary work machine 10 having a configuration in which only one cover material is disposed, or rotary work having a configuration in which one cover material is disposed in the apron main body 3 while one cover material is disposed in the shield cover main body 2. The present invention can be applied even to a machine.
Further, the present invention is not limited to the above embodiment, and may have various changed structures and configurations.

<Definition etc.>
In the present invention, the term “joint” refers to a fastening joint such as a bolt or a nut, a joint using a screw, an adhesive, an engagement that is sometimes bent by an elastic force, and the bending returns to its original state after attachment or detachment. Engaging engagements, etc. That is, the joining in the present invention may be anything as long as it can integrate two or more members.
In the present invention, the term “joining” refers to an engagement (locking) that is made when the deflection is restored after being attached or detached, or a joining (locking) that is simply hooked.

DESCRIPTION OF SYMBOLS 1 Apron member 2 Shield cover main-body part 2a 1st slit 3 Apron main-body part 3a 2nd slit 3b Apron main body surrounding part 4 Leveling member 5 Work rotor 21 Cover material 21e 5th cover material (cover material)
101 1st junction part (engagement part of a leveling member)
103 2nd junction part (fastening part of leveling member)
121e Fifth free end (free end with fifth cover)
221d Fourth joining means (fourth cover material joining means)
221e 5th joining means (joining means of 5th cover material)
G Cultivated ground L Leveled ground

Claims (6)

An apron main body part which is connected to a shield cover main body part covering the upper side of the work rotor so as to be vertically rotatable and covers a rear side of the work rotor;
A leveling member arranged on the working rotor side of the apron main body and leveling in contact with the cultivation ground;
A cover material disposed on the working rotor side of the apron main body, and disposed on the working rotor side than the ground leveling member,
The leveling member is joined to the apron body by a joint, and is detachably formed with respect to the apron body.
An apron member in which a free end portion which is an end portion in the rear side direction of the cover material is located at a position between the joint portion and the work rotor. The apron member according to claim 1, wherein the free end portion of the cover material is formed in parallel with the leveling member, and the free end portion and the leveling member are formed with a certain amount of space therebetween. The apron member according to claim 2, wherein the cover material is joined in a both-sided manner by a joining means on the shield cover main body side and a joining means on the leveling member side. The joining member on the leveling member side is located in the vicinity of the joining part on the shield cover main body side of the leveling member,
The apron member of Claim 3. The said junction part has joined the said leveling member and the said apron main-body part by methods other than engagement. The joining means on the shield cover main body side also joins other cover materials other than the cover material,
The apron member according to claim 3 or 4, wherein a front end portion of the other cover material extends to the shield cover main body portion side as a free end portion. The apron member according to any one of claims 1 to 5, wherein the cover material is formed of a material having high elasticity.

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