Ridge plastering machine

Abstract

To provide a levee plastering machine featuring a pretreatment part that enhances both soil throwing efficiency and maintenance convenience.SOLUTION: A levee plastering machine includes a pretreatment part that rotates a work rotor including a plurality of working claws to cut and break a portion of the original levee, and a levee leveling part that is positioned behind the pretreatment part that spreads soil piled on the side of the original levee onto the original levee to form a new levee. The work rotor further includes an earth-removal component that rotates with the working claws and a holding part that holds the working claws. The earth-removal component includes a scraper part and an earth-removal part. The scraper part is positioned in the vicinity of the holding part, with its end located between a cover member covering at least a portion of the work rotor and the holding part. In a front view of the work rotor, the earth-removal part is disposed so as to make its tip face the cutting edge of a first working claw, and in a side view of the work rotor, it is positioned within the width range of the rotation axis of the first working claw.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a ridging machine.

Background Art

[0002] Conventionally, a ridging machine is known as an agricultural working machine for forming ridges in paddy fields. Generally, the ridging machine newly fills up the cut-down original ridge, rotates a ridging body that abuts against the side surface of the ridge, and compresses the filled soil against the original ridge to form a new ridge. The operation of cutting down the original ridge is performed by a pre-treatment unit having a plurality of working claws arranged rotatably. In the pre-treatment unit, the soil scraped off by the working claws during the cutting-down operation is thrown onto the original ridge. In order to efficiently perform this throwing of soil, the ridging machine described in Patent Document 1 has a scooping claw for throwing soil arranged in the pre-treatment unit in addition to the working claws.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] An object of an embodiment of the present invention is to provide a ridging machine provided with a pre-treatment unit that achieves both an improvement in the throwing performance of soil and maintainability.

Means for Solving the Problems

[0005] A ridge-forming machine in one embodiment of the present invention comprises a pre-processing unit that rotates a work rotor including a plurality of work claws to break down a portion of the original ridge, and a ridge-forming unit located behind the pre-processing unit that applies soil piled on the side of the original ridge to the original ridge to form a new ridge, wherein the work rotor further includes a soil-removing component that rotates together with the work claws and a holding unit that holds the work claws, the soil-removing component having a scraper portion and a soil-removing portion, the scraper portion being positioned near the holding unit and having its end located between a cover member that covers at least a portion of the work rotor and the holding unit, the soil-removing portion being positioned such that, in a front view of the work rotor, its tip faces the cutting edge of the first work claw, and in a side view of the work rotor, it is located within the width range in the axial direction of the rotation axis of the first work claw.

[0006] A ridge-forming machine in one embodiment of the present invention comprises a pre-processing unit that rotates a work rotor including a plurality of work claws to break down a portion of the original ridge, and a ridge-forming unit located behind the pre-processing unit that applies soil piled on the side of the original ridge to the original ridge to form a new ridge, wherein the work rotor further includes a soil-removing component that rotates together with the work claws and a holding unit that holds the work claws, the soil-removing component has a scraper portion and a soil-removing portion, and in a front view of the work rotor, its outer diameter of rotation is smaller than the outer diameter of rotation of the first work claw, the scraper portion is located near the holding unit and its end is located between a cover member that covers at least a portion of the work rotor and the holding unit, and the soil-removing portion is located such that its tip faces the cutting edge of the first work claw in a front view of the work rotor.

[0007] In a front view of the work rotor, the shortest distance between the soil discharge section and the first work claw may be 1 cm or more and 3 cm or less.

[0008] The first working claw may be curved in a first direction parallel to the axis of rotation of the first working claw. In this case, the soil removal section may have a chamfered portion on the side opposite to the first direction at the end of the first working claw that faces the cutting edge.

[0009] The support portion that supports the soil-discarding portion of the soil-discarding component may be detachably attached to the holding portion.

[0010] The soil removal component may include two plate-shaped members fixed to the support portion. The two plate-shaped members may be arranged so as to sandwich the holding portion.

[0011] The scraper portion may be at least one of the two plate-shaped members.

[0012] At least one of the holding parts may hold the soil removal component.

[0013] Another embodiment of the present invention is a soil removal component provided in the pre-processing section of any of the above-described ridge-forming machines. [Effects of the Invention]

[0014] According to the present invention, it is possible to provide a levee-forming machine equipped with a pre-processing unit that achieves both improved soil discharge performance and ease of maintenance. [Brief explanation of the drawing]

[0015] [Figure 1] This diagram schematically shows the configuration of a ridge-forming machine in the first embodiment of the present invention, with the working rotor viewed from the front. [Figure 2] This figure shows the configuration of the pre-processing section in the ridge-forming machine according to the first embodiment of the present invention. [Figure 3] This diagram shows the configuration of the soil removal component in the levee building machine according to the first embodiment of the present invention. [Figure 4] This figure shows the configuration of the working rotor in a ridge-forming machine according to the first embodiment of the present invention. [Figure 5] This is a diagram illustrating the arrangement of the working claws and the soil discharge section in a levee-forming machine according to the first embodiment of the present invention. [Figure 6] This figure shows the configuration of the working rotor in a ridge-forming machine according to a second embodiment of the present invention.

Best Mode for Carrying Out the Invention

[0016] Hereinafter, a ridging machine according to an embodiment of the present invention will be described with reference to the drawings. However, the ridging machine according to an embodiment of the present invention can be implemented in many different ways and is not to be construed as limited to the description of the examples shown below. In the drawings referred to in this embodiment, the same parts or parts having the same function are denoted by the same reference numerals, and repeated descriptions thereof are omitted.

[0017] In the following description, for the sake of convenience of explanation, terms indicating directions such as “up”, “down”, “front”, “rear”, “right”, and “left” are used. However, with respect to the ridging machine according to an embodiment of the present invention, the direction in which gravity acts is “down”, and the opposite is “up”. Also, the direction of travel during work is “front”, and the opposite is “rear”. Further, toward the “front”, the right side is “right” and the left side is “left”.

[0018] In this specification, “front view of the working rotor” means a state in which the working rotor is viewed from the front along the axial direction of the rotation axis, and “side view of the working rotor” means a state in which the working rotor is viewed from the side along a direction orthogonal to the axial direction of the rotation axis. Also, in the front view of the working rotor, the side far from the viewpoint is called the “back side” and the side close to the viewpoint is called the “front side”.

[0019] <First Embodiment> [Configuration of the Ridging Machine] FIG. 1 is a diagram schematically showing the configuration of a ridging machine 100 according to the first embodiment of the present invention in a state where the working rotor is viewed from the front. As shown in FIG. 1, the ridging machine 100 includes a mounting portion 110, a power transmission portion 120, an offset mechanism portion 130, a land leveling portion 140, and a pretreatment portion 150. However, the configuration of the ridging machine 100 of this embodiment is not limited to the configuration shown in FIG. 1.

[0020] The mounting part 110 includes a lower link connecting part 111, a top link connecting part 112, a hitch frame 113, and an input shaft 114, and is mounted on a three-point link mechanism of a traveling body (not shown) such as a tractor. The connection between the ridging machine 100 and the traveling body may be through an auto hitch frame mounted on the three-point link mechanism of the traveling body.

[0021] The hitch frame 113 includes a mechanism for transmitting the power transmitted to the input shaft 114 to the power transmission part 120. The input shaft 114 is connected to the PTO shaft of the traveling body through a transmission joint such as a universal joint. The power output from the traveling body is transmitted to the input shaft 114. Although not shown, a control part is provided in the hitch frame 113 of the mounting part 110. The control part includes an arithmetic processing device, a storage device, a communication device, etc., and has a function of controlling the overall operation of the ridging machine 100.

[0022] The power transmission part 120 is a mechanism for transmitting the power input to the mounting part 110 to the ridging part 140 and the preprocessing part 150. Although not shown, in the ridging machine 100 of this embodiment, the power transmission part 120 is constituted by a wrap-around transmission device. Specifically, the power transmission part 120 is constituted by a chain drive device having a pair of sprockets and a roller chain. However, it is not limited to this example, and the power transmission part 120 may be a belt drive device having a pair of pulleys and a belt, or a transmission joint such as a universal joint.

[0023] The offset mechanism 130 is positioned between the mounting section 110 and the ridge-forming section 140, and rotates relative to the mounting section 110 to offset the ridge-forming section 140 and the pre-processing section 150 in the left-right direction. The offset mechanism 130 includes a parallel link mechanism rotatably connected to the mounting section 110 and the ridge-forming section 140. That is, by rotating the offset mechanism 130 relative to the mounting section 110, the ridge-forming section 140 can be moved in the left-right direction while maintaining its orientation (e.g., the direction of the rotation axis) and posture. However, the specific configuration of the offset mechanism 130 is not limited to this example; any mechanism capable of offsetting the ridge-forming section 140 and the pre-processing section 150 laterally is acceptable.

[0024] The offset mechanism 130 includes a first link arm 131, a second link arm 132, and a third link arm 133. The front end of the first link arm 131 is rotatably connected to the hitch frame 113, and its rear end is rotatably connected to the third link arm 133. Similarly, the front end of the second link arm 132 is rotatably connected to the hitch frame 113, and its rear end is rotatably connected to the third link arm 133. In this configuration, the first link arm 131 and the second link arm 132 are arranged substantially parallel to each other. The third link arm 133 is also arranged substantially parallel to the hitch frame 113. Thus, the offset mechanism 130 includes a parallel link mechanism composed of the hitch frame 113, the first link arm 131, the second link arm 132, and the third link arm 133.

[0025] In this embodiment, the offset mechanism 130 can offset the ridge preparation section 140 and the pre-processing section 150 in the left-right direction by operating the parallel link mechanism described above using an actuator (for example, an electric cylinder) not shown.

[0026] The ridge-forming section 140 is located behind the pre-processing section 150, which will be described later, and has the role of applying soil piled on the side of the original ridge to the original ridge to form a new ridge. The ridge-forming section 140 includes a roughly truncated cone-shaped slope ridge-forming body 141 that is rotatably supported, and an upper ridge-forming body 142 attached to the top of the slope ridge-forming body 141 via a mounting base (not shown). Power transmitted via the power transmission section 120 is input to the ridge-forming section 140 as rotational power. The slope ridge-forming body 141 and the upper ridge-forming body 142 rotate due to the input power and form a ridge at a position laterally to the ridge-forming machine 100. Specifically, the slope of the ridge is leveled by the slope leveling body 141, and the top surface (top) of the ridge is leveled by the top surface leveling body 142.

[0027] The pre-processing unit 150 has the role of rotating a work rotor 151, which includes a plurality of work claws 12, to break down a portion of the original ridge, while supplying the broken-down soil to the ridge leveling unit 140. The pre-processing unit 150 has a work rotor 151 that performs the work of breaking down the original ridge, and a cover member 152 that covers at least a portion of the work rotor 151 and suppresses the scattering of soil discharged from the work rotor 151 into the surrounding area.

[0028] The working rotor 151 has a structure in which multiple working claws 12 are arranged radially around the axis of the rotation shaft 10 (see Figure 2). From the viewpoint shown in Figure 1, the working rotor 151 rotates counterclockwise. When the rotating multiple working claws 12 come into contact with the original ridge, they cut away the original ridge and throw the cut-away soil toward the ridge-forming section 140. In the ridge-forming section 140, the soil thrown by the pre-processing section 150 is applied to the cut-away original ridge to form a new ridge. The specific structure of the working rotor 151 will be described later.

[0029] The cover member 152 includes a first cover member 152a positioned on the rear side of the work rotor 151, a second cover member 152b positioned on the front side, and a third cover member 152c connecting the first cover member 152a and the second cover member 152b and covering the upper part of the multiple work claws 12. The first cover member 152a and the second cover member 152b have surfaces perpendicular to the rotation axis 10 of the work rotor 151 (see Figure 2(B)). In this embodiment of the ridge-forming machine 100, the rotation axis 10 of the work rotor 151 is not parallel to the direction of travel (front-rear direction) of the ridge-forming machine 100, but is positioned at an angle inclined toward the ridge with respect to the direction of travel. However, this embodiment is not limited to the configuration in Figure 1, and the rotation axis 10 of the work rotor 151 may be positioned at an angle that is approximately perpendicular to the longitudinal direction of the ridge (approximately parallel to the rotation axis of the ridge-forming section 140). In this case, the third cover member 152c shown in Figure 1 is positioned on the front side with respect to the direction of travel, the second cover member 152b is positioned on the side of the outside (ridge side) of the device, and the first cover member 152a is positioned on the side of the center side of the device.

[0030] Although not shown in the diagram, the levee-forming machine 100 may also be equipped with a top-level processing unit. The top-level processing unit has the role of cutting away a portion of the upper surface of the original levee. Similar to the pre-processing unit 150, the top-level processing unit has a plurality of rotatable claws, and the rotating claws cut away a portion of the upper surface of the original levee. The portion cut away by the top-level processing unit is covered with soil supplied from the pre-processing unit 150 and pressed down by the top-level levee body 142 to form a levee.

[0031] [Structure of the pre-processing section] Figure 2 shows the configuration of the pre-processing unit 150 in the ridge-forming machine 100 of the first embodiment of the present invention. Specifically, Figure 2(A) is a view of the pre-processing unit 150 from an oblique direction with respect to the axial direction of the rotation shaft 10, and Figure 2(B) is a view of the pre-processing unit 150 from the side with respect to the axial direction of the rotation shaft 10. Note that the view of the work rotor 151 from the viewpoint shown in Figure 2(B) corresponds to a side view of the work rotor 151.

[0032] In the viewpoint shown in Figure 2(A), the working rotor 151 rotates counterclockwise around the rotation axis 10. The multiple working claws 12 are configured to be curved in the opposite direction to the rotation direction R when viewed from the front of the working rotor, and are also configured to be curved either towards the back or towards the front in the axial direction of the rotation axis 10. Each working claw 12 rotates around the axis of the rotation axis 10 to perform the work of breaking down the original ridge. The base of each working claw 12 is held by a holding part 11. The holding part 11 shown in Figures 2(A) and 2(B) is a type of holding part called a holder. As will be described in detail later, in this embodiment, the base of the working claw 12 is inserted into a hollow part formed by combining a plate-shaped holding plate 11a with a roughly "U"-shaped holding frame 11b, and the working claw 12 is fixed by a fastener 11c such as a bolt.

[0033] As shown in Figure 2(B), in this embodiment, the work rotor 151 has each holding part 11 arranged in three positions in the depth direction (axial direction of the rotation axis 10). Two holding parts 11 are arranged at each position, for a total of six work claws 12. In this embodiment, the work claw 12 held by the holding part 11 at the innermost position (the position closest to the first cover member 152a) when viewed from the front of the work rotor 151 is curved toward the back in the axial direction of the rotation axis 10, while the other work claws 12 are curved toward the front. However, this is not the only example, and it is also possible to configure all work claws 12 to curve in the same direction (either toward the back or toward the front).

[0034] As shown in Figure 2(A), the work rotor 151 of this embodiment includes a soil-discarding component 20. The soil-discarding component 20 is fixed to the holding portion 11 at the innermost position (closest to the first cover member 152a: the base side of the work rotor 151) in a front view of the work rotor 151, and is an auxiliary component that works in cooperation with the work claw 12 in the middle of the depth direction adjacent to the front side in the rotation direction R to throw the soil cut by the work rotor 151 towards the original ridge. The soil-discarding component 20 will be described in detail with reference to Figures 2 and 3.

[0035] Figure 3 shows the configuration of the soil removal component 20 in the ridge-forming machine 100 of the first embodiment of the present invention. Specifically, Figure 3(A) is an explanatory diagram of the soil removal component 20 viewed from an oblique direction with reference to the axial direction of the rotation axis 10 of the working rotor 151, Figure 3(B) is an explanatory diagram of the soil removal component 20 in a side view of the working rotor 151, Figure 3(C) is an explanatory diagram of the soil removal component 20 in a front view of the working rotor, and Figure 3(D) is an explanatory diagram of the soil removal component 20 viewed from a side view of the working rotor 151 from a direction 90 degrees different from that in Figure 3(B).

[0036] As shown in Figure 3, the soil removal component 20 of this embodiment includes a support portion 21, a soil removal portion 22, a scraper portion 23, and a rotation stopping portion 24. The support portion 21 is a plate-shaped member that supports the soil removal portion 22, and the soil removal portion 22 is welded to one end (tip side) of the support portion 21. A through hole 21a for attachment to the holding portion 11 is formed on the other end (base side) of the support portion 21 to which the soil removal portion 22 is not welded, and the soil removal component 20 is fixed in a state in contact with the holding portion 11, with the contact surface 21b of the support portion 21 shown in Figure 3(D). In this embodiment, the soil removal portion 22 is a curved plate-shaped member such that the surface facing the rotation axis 10 is concave. However, the shape of the soil removal portion 22 is not limited to this.

[0037] As shown in Figure 2(A), the soil removal section 22 is positioned such that its front end in the rotation direction R faces the cutting edge of the adjacent work claw 12 in the rotation direction R, and the curved recess of the adjacent work claw 12 in the rotation direction R faces the concave surface of the soil removal section 22. A chamfered portion 22a is provided at the end of the soil removal section 22 that faces the cutting edge of the adjacent work claw 12. As will be described in detail later, the position of the chamfered portion in the width direction of the soil removal section 22 can be determined according to the curvature direction of the cutting edge of the adjacent work claw 12 (the curvature direction in the axial direction of the rotation axis 10).

[0038] The soil-discarding section 22 is supported by a support section 21 attached to the holding section 11, and therefore rotates with the rotation of the working claw 12. In this embodiment, the support section 21 and the soil-discarding section 22 are made of separate components and are fixed together by welding. However, this is not the only example, and the support section 21 and the soil-discarding section 22 may be integrally molded.

[0039] The scraper section 23 has the role of scraping off soil adhering to the adjacent cover member, namely the first cover member 152a (see Figure 2). The scraper section 23 is fixed (welded) to the contact surface 21b of the support section 21 and is composed of a plate-shaped member that protrudes from the support section 21 toward the first cover member 152a in a side view of the work rotor. Of the ends of the scraper section 23, the end closest to the first cover member 152a is located between the first cover member 152a and the holding section 11 that is closest to the first cover member 152a (located furthest inward in a front view of the work rotor 151).

[0040] With this configuration, even if soil that is broken down during operation gradually accumulates on the first cover member 152a, the scraper section 23, which rotates together with the work claw 12, scrapes off the soil it comes into contact with, thereby reducing the amount of soil adhering to the first cover member 152a. This prevents the holding section 11, which is closest to the first cover member 152a, from being worn down by the soil that accumulates inside the cover member 152. In this embodiment, the scraper section 23 is made of a plate-shaped member, but it is not limited to this example, and other shapes are acceptable as long as they have the function of removing soil adhering to the first cover member 152a. Also, as shown in Figure 4(A), in the rotation direction R of the work rotor, the scraper section 23 is configured to protrude forward of the holding section 11 to which the soil removal component 20 is attached, thus effectively protecting the holding section 11.

[0041] The rotation-retaining part 24 works in cooperation with the scraper part 23 to restrain the soil removal component 20 (specifically, the support part 21) from rotating relative to the holding part 11. The rotation-retaining part 24, like the scraper part 23, is fixed (welded) to the contact surface 21b of the support part 21 and consists of a plate-shaped member that protrudes from the support part 21 toward the first cover member 152a. The rotation-retaining part 24 is positioned opposite the scraper part 23, with the through hole 21a of the support part 21 in between.

[0042] The soil removal component 20 is subjected to a large load during soil removal work. In this embodiment, as shown in Figure 2(A), the support portion 21 is fixed to the holding portion 11 using a fastener 11c, so if the soil removal component 20 is subjected to a large load, there is a risk that the support portion 21 will rotate. The rotation-stopping portion 24 fixed to the support portion 21 comes into contact with the holding portion 11 when the soil removal component 20 is subjected to a load, preventing the support portion 21 from rotating around the fastener 11c. The specific arrangement of the rotation-stopping portion 24 will be described later.

[0043] [Configuration of the working rotor] Figure 4 shows the configuration of the work rotor 151 in the ridge-forming machine 100 of the first embodiment of the present invention. Specifically, Figure 4(A) is a front view of the work rotor 151, and Figure 4(B) is a view of the work rotor 151 from the opposite direction to the front view. For the sake of explanation, the work claw 12 positioned on the front side in the rotational direction R relative to the soil-discarding component 20 will be referred to as "work claw 12-1", and the work claw 12 held by the holding part 11 to which the soil-discarding component 20 is fixed will be referred to as "work claw 12-2".

[0044] As shown in Figures 4(A) and 4(B), the retaining part 11 includes a retaining plate 11a, a retaining frame 11b, and a fixing device 11c. The retaining plate 11a is a member fixed so as to be rotatable around the axis of the rotating shaft 10 (see Figure 2), and is a base member for fixing the retaining frame 11b. In the example shown in Figure 4(A), three retaining plates 11a are arranged in the axial direction of the rotating shaft 10, corresponding to three positions separated in the axial direction of the rotating shaft 10, and each retaining plate 11a is common to two retaining parts 11 corresponding to the same position. The retaining plate 11a is provided with a through hole for inserting the fixing device 11c. The retaining frame 11b is a member with a "U" shaped cross-section, and when combined with the retaining plate 11a, it forms a hollow part into which the base of the working claw 12 (the part attached to the retaining part 11) is inserted. The retaining frame 11b is also provided with a through hole for inserting the fixing device 11c. The fastener 11c is a component that secures the retaining plate 11a and the retaining frame 11b. For example, a bolt and a nut can be used as the fastener 11c.

[0045] In this embodiment, the support portion 21 of the soil removal component 20 is fixed to the holding portion 11 in which the working claws 12-2 are held. Specifically, the support portion 21 is fixed to the holding frame 11b by inserting a fastener 11c through a through hole 21a (see Figure 3) while the support portion 21 is placed on top of the holding frame 11b with its contact surface 21b in contact with the holding frame 11b. Although not shown, a through hole for inserting the fastener 11c is also provided in the base of the working claws 12 inserted into the hollow portion of the holding portion 11. In other words, the bolt of the fastener 11c is inserted through the through holes provided in the holding plate 11a, the working claws 12, the holding frame 11b, and the support portion 21 in that order. Note that here the support portion 21 is attached with its contact surface 21b in contact with the holding frame 11b, but the support portion 21 may also be attached with the opposite side of the support portion 21 to the holding plate 11a in contact with the holding frame 11b.

[0046] In this embodiment, the support portion 21 is structured to be retrofitted to the retaining frame 11b, so that the soil removal component 20 can be detachably attached to the existing retaining portion 11. In other words, according to this embodiment, the soil removal component 20 can be detachably attached to the existing work rotor. Therefore, if the soil removal portion 22 deteriorates due to wear or other reasons, only the soil removal component 20 can be easily replaced.

[0047] Furthermore, as mentioned above, the rotation-stopping part 24 is provided to prevent the support part 21 of the soil-removing component 20 from rotating around the axis of the fixing device 11c. As shown in Figure 4(B), the rotation-stopping part 24 is positioned such that its approximate longitudinal center is closest to the fixing device 11c. In other words, the rotation-stopping part 24 is positioned so that, regardless of whether the soil-removing component 20 is subjected to a load in the rotational direction R or the opposite direction, it contacts the holding plate 11a with almost equal force, thereby generating an equivalent resistance force against the rotation of the support part 21.

[0048] Furthermore, as shown in Figure 4(B), in this embodiment, the soil removal component 20 has a scraper section 23 positioned on the front side of the rotation direction R of the work rotor 151, and a rotation stopping section 24 positioned on the rear side of the rotation direction R of the work rotor 151. In other words, in this embodiment, the soil removal component 20 has two plate-shaped members (scraper section 23 and rotation stopping section 24) fixed to the support section 21, which are arranged to match the shape of the holding section 11 and sandwich the holding section 11. In this case, the scraper section 23 also contacts the holding plate 11a when the support section 21 attempts to rotate, generating resistance to rotation. In other words, the scraper section 23 in this embodiment also functions as a rotation stopping section. As in this embodiment, by sandwiching the holding section 11 with two plate-shaped members, unwanted rotation due to the load on the soil removal component 20 can be prevented more reliably. The arrangement of the scraper section 23 and the rotation-stopping section 24 is not limited to the example described above. For example, the scraper section 23 can be positioned on the rear side of the rotation direction R of the work rotor 151, and the rotation-stopping section 24 can be positioned on the front side of the rotation direction R of the work rotor 151. In this embodiment, in a side view of the work rotor 151, the scraper section 23 is configured to protrude more towards the first cover member 152a than the rotation-stopping section 24. However, the amount of protrusion toward the first cover member 152a may be the same (similar) for both the scraper section 23 and the rotation-stopping section 24.

[0049] Incidentally, as shown in Figure 4(A), the tip of the soil discharge section 22 is positioned adjacent to the front side of the working rotor 151 in the rotation direction R, and is positioned to face the cutting edge of the nearest working claw 12-1. That is, in a front view of the working rotor 151, the curvature direction of the soil discharge section 22 is opposite to the curvature direction of the working claw 12-1. In this embodiment, by positioning the working claw 12-1 and the soil discharge section 22 facing each other in a specific positional relationship, the soil cut by the working claw 12-1 can be held and discharged by the working claw 12-1 and the soil discharge section 22, thereby effectively supplying soil to the ridge-forming section 140. Furthermore, in the ridge-forming machine 100 of this embodiment, the soil discharge performance and maintainability of the working rotor 151 are improved by devising the arrangement of the soil discharge section 22 relative to the working claw 12-1. This point will be explained using Figure 5.

[0050] Figure 5 is a diagram illustrating the arrangement relationship between the work claws 12-1 and the soil discharge section 22 in the ridge-forming machine 100 of the first embodiment of the present invention. Specifically, Figure 5(A) is a magnified view of the vicinity of the cutting edge of the work claws 12-1 and the end of the soil discharge section 22 in a front view of the work rotor, and Figure 5(B) is a magnified view of the vicinity of the cutting edge of the work claws 12-1 and the end of the soil discharge section 22 in a side view of the work rotor.

[0051] In the front view of the work rotor 151 shown in Figure 5(A), the shortest distance L between the cutting edge of the work claw 12-1 and the end of the soil-discarding section 22 (the end of the work claw 12-1 facing the cutting edge) (in other words, the shortest distance L between the work claw 12-1 and the soil-discarding section 22) is preferably 1 cm or more and 3 cm or less. If the shortest distance L is too narrow, the risk of contact between the work claw 12-1 and the soil-discarding section 22 increases, and if the shortest distance L is too wide, obstacles such as foundation stones are more likely to get stuck in the gap, increasing the risk of damage to the work rotor 151.

[0052] Furthermore, in a front view of the work rotor 151 shown in Figure 5(A), it is desirable that the rotational outer diameter of the soil-removing part 20 is smaller than the rotational outer diameter of the work claw 12-1. Here, "rotational outer diameter" refers to the diameter of the rotational trajectory R1 of an object (the trajectory traced by the part of the object furthest from its center of rotation) when the object rotates around a predetermined axis. In other words, the rotational outer diameter of the soil-removing part 20 corresponds to the diameter of the rotational trajectory R1 of the soil-removing part 20, and the rotational outer diameter of the work claw 12-1 corresponds to the diameter of the rotational trajectory R2 of the work claw 12-1. If the rotational outer diameter of the soil-removing part 20 is equal to or greater than the rotational outer diameter of the work claw 12-1, it will be less protected by the work claw 12-1, increasing the risk of the soil-removing section 22 coming into contact with an obstacle and being damaged.

[0053] Furthermore, in the side view of the work rotor 151 shown in Figure 5(B), it is desirable that the soil-discarding section 22 be located within the width W1 in the axial direction of the rotation axis 10 of the work claw 12-1. That is, the width W2 of the soil-discarding section 22 is smaller than the width W1 of the work claw 12-1, and the ends of the soil-discarding section 22 in the width direction are positioned so as not to protrude outside the range of width W1.

[0054] As shown in Figure 5(B), the working claw 12-1 has a shape that gradually curves in a predetermined direction from a flat plate-like portion 12-1c including the base. In the example shown in Figure 5(B), the working claw 12-1 is curved toward the left in the drawing, and this direction is toward the rear along the axial direction of the rotation axis 10 (towards the first cover member 152a).

[0055] Thus, the working claw 12-1 has a curved portion of its blade (usually called the lateral blade portion), and this curved portion 12-1b has the function of scooping up and throwing away soil. In Figure 5(B), the area indicated by width W1 is the region (cuttable region) in which the rotating working claw 12-1 acts on the soil, and is also called the "operating area" or "cutting range." In other words, the operating area is the region in which the soil is cut away by the rotation of the working claw 12-1, and width W1 means the width of the operating area (cutting range) in the axial direction of the rotation axis 10.

[0056] In this embodiment, in a side view of the working rotor 151, the soil-discarding section 22 is contained within the aforementioned operating area (i.e., within the width W1), allowing the curved portion 12-1b of the working claws 12-1 and the soil-discarding section 22 to efficiently hold onto soil, thereby improving the soil-discarding performance of the working rotor 151. Furthermore, by ensuring that the soil-discarding section 22 is contained within the operating area of ​​the working claws 12-1 in the width direction, the working claws 12-1 protect the soil-discarding section 22 during operation, reducing the risk of the soil-discarding section 22 colliding with obstacles such as foundation stones.

[0057] Furthermore, as shown in Figure 5(B), the soil-removing section 22 has a chamfered portion 22a at its front end in the rotational direction R (the side facing the cutting edge of the working claw 12-1). The chamfered portion 22a is located on the side where the flat plate portion 12-1c is located in the width direction, that is, on the side opposite to the curvature direction of the working claw 12-1. Because the cutting edge of the working claw 12-1 is curved, when viewed in three dimensions, the width of the aforementioned working area actually narrows as it approaches the cutting edge. Therefore, in order to prevent the soil-removing section 22 from protruding from the working area as much as possible, the chamfered portion 22a is positioned on the side opposite to the curvature direction of the working claw 12-1.

[0058] As described above, the pre-processing unit 150 of the ridge-forming machine 100 of this embodiment includes a soil-discarding component 20 that is in a specific positional relationship with the adjacent work claw 12-1. Specifically, in the first configuration, in a side view of the work rotor 151, the soil-discarding section 22 is located within a width W1 in the axial direction of the rotation axis 10 of the work claw 12-1. With the first configuration, the soil-discarding section 22 does not protrude from the working range (cutting range) of the work claw 12-1 in its width direction, thus reducing the risk of collision with obstacles.

[0059] Furthermore, in the second configuration, in a front view of the working rotor 151, the rotational outer diameter of the soil-removing part 20 is smaller than the rotational outer diameter of the working claw 12-1. With this second configuration, the soil-removing part 22 does not extend beyond the operating range (cutting range) of the working claw 12-1 in the radial direction of its rotation, thereby reducing the risk of collision with obstacles.

[0060] As described above, the pre-processing unit 150 of this embodiment achieves improvements in both soil discharge performance and safety by incorporating both the first and second configurations. However, the ridge-forming machine 100 described in this embodiment is merely a preferred example, and even if only one of the first or second configurations is included, improvements in both soil discharge performance and safety can be achieved compared to the conventional technology.

[0061] Furthermore, the soil removal component 20 of this embodiment is provided with a scraper portion 23 on the support portion 21 (the contact surface 21b) that supports the soil removal portion 22, and in addition to the soil removal function, it also has the function of removing soil adhering to the adjacent cover member. By arranging the scraper portion 23, it is possible to suppress soil from adhering inside the cover member 152, and problems such as increased wear due to contact between soil adhering inside the cover member 152 and the holding portion 11 or working claw 12, or an increase in the overall weight of the working rotor 151 due to soil adhering to the holding portion 11, and an increase in the driving torque (torque required for rotation) of the working rotor 151 can be reduced. Moreover, since the soil removal component 20 of this embodiment is configured to be detachable from the holding portion 11, it can be easily replaced even if the soil removal component 20 wears down during operation and its function deteriorates.

[0062] <Second Embodiment> This embodiment describes an example in which a work rotor 151a is placed in place of the work rotor 151 in the ridge-forming machine 100 of the first embodiment. In this embodiment, components that are the same as those described in the first embodiment may be described using the same reference numerals and their description may be omitted. Also, the configuration of the ridge-forming machine other than the work rotor 151a is the same as in the first embodiment, so its description is omitted here.

[0063] Figure 6 shows the configuration of the work rotor 151a in the ridge-forming machine 100 of the second embodiment of the present invention. Specifically, Figure 6 is a front view of the work rotor 151a.

[0064] As shown in Figure 6, in this embodiment, the working rotor 151a has the soil-removing component 30 held in the holding portion 11, similar to the working claws 12-1. Specifically, the soil-removing component 30 consists of a support portion 31 and a soil-removing portion 32, with the support portion 31 being inserted into and held in the hollow portion of the holding portion 11. The support portion 31 is a member that, when viewed from the front of the working rotor 151a, is curved in a different direction (opposite direction) from the working claws 12-1 when considering the rotation direction R, and the soil-removing portion 32 is fixed near its tip (on the front side of the rotation direction R). The relationship between the soil-removing portion 32 and the working claws 12-1, for example, the arrangement relationship of the soil-removing portion 32 with respect to the working claws 12-1 and the relationship between the working area of ​​the working claws 12-1 and the shape of the soil-removing portion 32, are the same as in the first embodiment. However, the shape of the support portion 31 is not limited to this example.

[0065] Although not shown in the diagram, the working rotor 151a may further include a scraper section. In this case, it is preferable that the soil removal component 30 be attached to the holding section 11 at the innermost part of the cover member 152 (the position closest to the first cover member 152a: the base side of the working rotor 151). The scraper section may be fixed (welded) to the support section 31. For example, a plate-shaped member fixed to the support section 31 and protruding toward the cover member adjacent to the support section 31 (in this embodiment, the first cover member 152a) can be used as the scraper section. Alternatively, for example, the scraper section may be prepared as a separate component from the support section 31 and fixed to the holding section 11. In this embodiment, since the support section 31 is held by the holding section 11, the rotation restraint section 24 described in the first embodiment can be omitted.

[0066] (modified version) In the first and second embodiments, an example was shown in which the work claw 12-1 adjacent to the soil removal component 20 is curved toward the side where the first cover member 152a is located (the rear side in a front view of the work rotor 151) in the axial direction of the rotation axis 10 of the work rotor 151. However, the present invention is not limited to this example, and can also be applied to work claws curved in the opposite direction (towards the front side in a front view of the work rotor 151).

[0067] Although the present invention has been described above with reference to the drawings, the present invention is not limited to the embodiments described above, and can be modified as appropriate without departing from the spirit of the invention. For example, any addition, deletion, or design modification of components by a person skilled in the art based on each embodiment is also included in the scope of the present invention, as long as it retains the gist of the present invention. In the embodiments described above, an example of applying the present invention to a levee plastering machine 100 in which the rotation axis 10 of the work rotor 151 is inclined with respect to the levee was explained, but it goes without saying that the present invention can also be applied to a levee plastering machine in which the rotation axis 10 is (approximately) parallel to the direction of travel of the levee plastering machine 100, that is, the rotation axis 10 is (approximately) parallel to the levee, or to a levee plastering machine in which the rotation axis 10 is (approximately) perpendicular to the direction of travel of the levee plastering machine 100, that is, the rotation axis 10 is (approximately) perpendicular to the levee. Furthermore, each of the embodiments described above can be combined as appropriate as long as they do not contradict each other, and technical matters common to each embodiment are included in each embodiment even if they are not explicitly described.

[0068] Any effects or benefits other than those brought about by the embodiments described above, if they are clear from the description herein or easily predictable to a person skilled in the art, are naturally considered to be brought about by the present invention. [Explanation of Symbols]

[0069] 10...Rotating shaft, 11...Holding part, 11a...Holding plate, 11b...Holding frame, 11c...Fixing device, 12, 12-1...Working claw, 12-1b...Curved part, 12-1c...Flat plate-shaped part, 12-2...Working claw, 20...Soil removal part, 21...Support part, 21a...Through hole, 22...Soil removal part, 22a...Chamfered part, 23...Scraper part, 24...Rotation stopper part, 30...Soil removal part, 31...Support part, 32...Soil removal part, 100...Ridge plastering machine, 110...Mounting part, 111...Lower link connecting part, 1 12...Top link connecting section, 113...Hitch frame, 114...Input shaft, 120...Power transmission section, 130...Offset mechanism section, 131...First link arm, 132...Second link arm, 133...Third link arm, 140...Ridge shaping section, 141...Slope ridging body, 142...Upper ridging body, 150...Pre-processing section, 151, 151a...Working rotor, 152...Cover member, 152a...First cover member, 152b...Second cover member, 152c...Third cover member

Claims

1. A pre-processing unit that rotates a work rotor containing multiple working claws to break up a portion of the original ridge, A ridge-shaping section is located behind the aforementioned pre-processing section and applies soil piled on the side of the original ridge to the original ridge to form a new ridge, Equipped with, The work rotor further includes a soil removal component that rotates together with the work claw and a holding portion that holds the work claw, The aforementioned soil removal component has a scraper section and a soil removal section, The scraper portion is positioned near the holding portion, and its end is located between the cover member that covers at least a part of the work rotor and the holding portion. The soil-discarding section is positioned such that, in a front view of the work rotor, its tip faces the cutting edge of the first work claw, which is one of the plurality of work claws, and in a side view of the work rotor, it is located within the width range in the axial direction of the rotation axis of the first work claw. The soil removal component is mounted on a holding part that holds a second working claw, which is one of the plurality of working claws adjacent to the first working claw, in a ridge-forming machine.

2. A pre-processing unit that rotates a work rotor containing multiple working claws to break up a portion of the original ridge, A ridge-shaping section is located behind the aforementioned pre-processing section and applies soil piled on the side of the original ridge to the original ridge to form a new ridge, Equipped with, The work rotor further includes a soil removal component that rotates together with the work claw and a holding portion that holds the work claw, The soil removal component has a scraper section and a soil removal section, and in a front view of the work rotor, its outer diameter is smaller than the outer diameter of the first work claw, which is one of the plurality of work claws. The scraper portion is positioned near the holding portion, and its end is located between the cover member that covers at least a part of the work rotor and the holding portion. The soil removal section is positioned such that, in a front view of the work rotor, its tip faces the cutting edge of the first work claw. The soil removal component is mounted on a holding part that holds a second working claw, which is one of the plurality of working claws adjacent to the first working claw, in a ridge-forming machine.

3. The ridge-forming machine according to claim 1 or 2, wherein, in a front view of the work rotor, the shortest distance between the soil-discharging section and the first work claw is 1 cm or more and 3 cm or less.

4. The first working jaw is curved toward a first direction parallel to the axis of rotation of the first working jaw, The soil discharge section has a chamfered portion on the end facing the cutting edge of the first working claw, on the side opposite to the first direction, as described in claim 1 or 2.

5. The ridge-forming machine according to claim 1 or 2, wherein the support portion that supports the soil-discharging portion of the soil-discharging component is detachably attached to the holding portion.

6. The soil removal component has two plate-shaped members fixed to the support part, The ridge-forming machine according to claim 5, wherein the two plate-like members are arranged to sandwich the holding portion.

7. The ridge-forming machine according to claim 6, wherein the scraper portion is at least one of the two plate-like members.

8. A pre-processing unit that rotates a work rotor including a plurality of work claws and a plurality of holding parts for holding the plurality of work claws to break up a portion of the original ridge, A ridge-shaping section is located behind the aforementioned pre-processing section and applies soil piled on the side of the original ridge to the original ridge to form a new ridge, A soil removal component that is detachably attached to the holding part of the pre-processing unit in a ridge-forming machine equipped with, The aforementioned soil removal component has a scraper section and a soil removal section, The scraper portion is located near the holding portion when the soil removal component is attached to the holding portion, and its end is located between the cover member that covers at least a part of the work rotor and the holding portion. The soil removal unit, with the soil removal component mounted on the holding unit, is such that, in a front view of the work rotor, its tip faces the cutting edge of the first work claw, which is one of the plurality of work claws, and in a side view of the work rotor, it is located within the width range in the axial direction of the rotation axis of the first work claw. The holding portion to which the soil removal component is attached is a holding portion that holds a second working claw, which is one of the plurality of working claws adjacent to the first working claw.

9. A pre-processing unit that rotates a work rotor including a plurality of work claws and a plurality of holding parts for holding the plurality of work claws to break up a portion of the original ridge, A ridge-shaping section is located behind the aforementioned pre-processing section and applies soil piled on the side of the original ridge to the original ridge to form a new ridge, A soil removal component that is detachably attached to the holding part of the pre-processing unit in a ridge-forming machine equipped with, The soil removal component has a scraper section and a soil removal section, and in a front view of the work rotor, its outer diameter is smaller than the outer diameter of the first work claw, which is one of the plurality of work claws. The scraper portion is located near the holding portion when the soil removal component is attached to the holding portion, and its end is located between the cover member that covers at least a part of the work rotor and the holding portion. The soil removal unit is positioned such that, with the soil removal component attached to the holding unit, its tip faces the cutting edge of the first working claw when viewed from the front of the working rotor. The holding portion to which the soil removal component is attached is a holding portion that holds a second working claw, which is one of the plurality of working claws adjacent to the first working claw.

Images