Ridge forming board, ridge forming body and ridge coating machine

Abstract

To provide a levee formation body capable of improving durability.SOLUTION: A levee formation body 4 of a levee plastering machine 1 includes multiple levee side formation plates 42, and multiple levee top face formation plates 43. Each top face formation plate 43 has a curved-surface plate thickness changing part 63 having a changing plate thickness dimension. The plate thickness changing part 63 is formed in such a shape that the plate thickness dimension is increased gradually from a rotative direction forward end part toward a rotative direction rear end part.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a ridge forming plate, a ridge forming body, and a ridge coating machine that can improve durability. [Background technology]

[0002] BACKGROUND ART Conventionally, for example, a ridge coating machine described in Patent Document 1 below is known.

[0003] This conventional ridge coating machine includes a machine body that is connected to a traveling vehicle such as a tractor, an embankment body attached to the machine body, and a ridge forming body attached to the machine body. The ridge forming body includes a rotating body that rotates in a predetermined direction, a plurality of ridge side forming plates attached to the rotating body, and a plurality of ridge top forming plates attached to the rotating body. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2015-146793 Summary of the Invention [Problem to be solved by the invention]

[0005] However, in the above-mentioned conventional ridge coating machines, the thickness dimensions of the ridge forming plates (e.g., ridge side forming plates, ridge top forming plates, etc.) are the same throughout, so for example, only the rear part in the direction of rotation is likely to wear out first, and there is a risk that sufficient durability will not be achieved.

[0006] The present invention has been made in consideration of these points, and aims to provide a ridge forming plate, a ridge forming body, and a ridge coating machine that can improve durability. [Means for solving the problem]

[0007] The ridge forming plate of the present invention is a ridge forming plate used in a ridge forming body that performs ridge forming work while rotating, and is provided with a curved thickness changing portion in at least a portion thereof in which the plate thickness dimension changes, and the plate thickness changing portion is formed in a shape in which the plate thickness dimension gradually increases from the front end in the rotation direction to the rear end in the rotation direction.

[0008] In addition, the ridge forming plate of the present invention is a ridge forming plate used in a ridge forming body that performs ridge forming work while rotating, and is equipped with a curved plate thickness changing section whose plate thickness dimension changes, and a plate thickness constant section connected to the front end of the plate thickness changing section in the rotational direction, and the plate thickness changing section is formed in a shape such that its plate thickness dimension gradually increases as it moves from the front end of the rotational direction to the rear end of the rotational direction. [Effects of the Invention]

[0009] According to the present invention, durability can be improved. [Brief explanation of the drawings]

[0010] [Figure 1] 1 is a plan view of a ridge coating machine according to an embodiment of the present invention. FIG. [Figure 2] FIG. 2 is a plan view of the ridge forming body of the same ridge coating machine. [Figure 3] FIG. 2 is a cross-sectional view of the ridge forming body of the same ridge coating machine. [Figure 4] This is a plan view of the ridge top surface forming plate of the same ridge forming body (plan view of the state before installation). [Figure 5] This is a cross-sectional view of the ridge top surface forming plate of the same ridge forming body (cross-sectional view of the state before installation). [Figure 6] 5 is a cross-sectional view taken along line AA in FIG. 4 (a cross-sectional view in a state developed into a plane). DETAILED DESCRIPTION OF THE INVENTION

[0011] An embodiment of the present invention will be described with reference to FIGS.

[0012] In FIG. 1, reference numeral 1 denotes a ridge coating machine, which is an agricultural machine that is used by being connected to the rear of a tractor (not shown) that is a traveling vehicle.

[0013] That is, the ridge coater 1 is connected to the rear of the tractor and performs ridge coating work while moving forward as the tractor travels forward. Note that the ridge coater 1 is, for example, of a return type, and when it reaches a corner of a field, it is switched from the forward working state shown in Figure 1 to a reverse working state, and performs ridge coating work while moving backward as the tractor travels backward.

[0014] As shown in Figure 1, the ridge painting machine 1 comprises a body 2 connected to a three-point link at the rear of the tractor, an embankment body 3 attached to the body 2 and performing embankment work while rotating in a predetermined direction, a ridge forming body 4 attached to the body 2 and performing ridge forming work while rotating in a predetermined direction on the rear side of the embankment body 3, and an upper surface scraping body 5 attached to the body 2 and performing ridge top scraping work while rotating in a predetermined direction on the front side of the embankment body 3.

[0015] The machine body 2 has a fixed machine frame 11 that is detachably connected to a three-point link at the rear of the tractor, a rotating arm 12 that is rotatably connected at one end to the fixed machine frame 11, and a movable machine frame 13 that is rotatably connected to the other end of the rotating arm 12.

[0016] The embankment body 3, ridge forming body 4 and upper surface scraping body 5 are each mounted on a movable machine frame 13. The embankment body 3, ridge forming body 4 and upper surface scraping body 5 constitute a ridge painting work section 10.

[0017] The fixed machine frame 11 has a shaft holder 15, and an input shaft (not shown) is rotatably mounted on this shaft holder 15. The input shaft is connected to a PTO shaft of a tractor (not shown) via a joint. The movable machine frame 13 also functions as a transmission case that houses a transmission means that transmits power from the input shaft to the ridge-painting working unit 10.

[0018] The ridge coating machine 1 is provided with a plurality of cylinders 16, 17, such as electric hydraulic cylinders, and is selectively switched between a forward working state, a storage state, and a reverse working state based on the operation of these cylinders 16, 17.

[0019] The embankment body 3 has a rotating shaft 21 that is driven to rotate based on power from the input shaft side, and embankment claws 22 that are detachably attached to the rotating shaft 21 and that are driven to rotate together with the rotating shaft 21 while tilling the soil on the rice field surface and ridges (base ridges) and piling up the tilled soil.

[0020] Similarly, the upper surface scraping body 5 has a rotating shaft 23 that is driven to rotate based on power from the input shaft side, and cutting claws 24 that are detachably attached to this rotating shaft 23 and scrape the upper surface of the ridge (original ridge) while being driven to rotate together with the rotating shaft 23.

[0021] The embankment body 3 is covered by an embankment body cover 26, the upper surface scraper body 5 is covered by an upper surface scraper body cover 27, and the ridge forming body 4 is covered by a ridge forming body cover 28. In addition, a gauge wheel 31 is provided on the movable machine frame 13, and a rotating shaft 33 for driving the ridge forming body (a drive shaft to which the ridge forming body 4 is detachably attached) which is driven and rotated based on power from the input shaft side is rotatably provided on the shaft holding portion 32 of this movable machine frame 13.

[0022] As shown in Figures 1 to 3, the ridge forming body 4 comprises a rotating body 41 that is detachably attached to the rotating shaft 33 of the movable machine frame 13 of the machine body 2 and rotates (driven to rotate) in a predetermined direction together with the rotating shaft 33 around a horizontal rotation center axis (rotation center) X, a plurality of ridge side forming plates 42 that are attached to the rotating body 41 and driven to rotate together with the rotating body 41 to compact the embankment made by the embankment body 3 and form an inclined ridge side, and a plurality of ridge top surface forming plates (ridge forming plates) 43 that are attached to the rotating body 41 and driven to rotate together with the rotating body 41 to compact the embankment made by the embankment body 3 and form a horizontal ridge top surface and an arc-shaped ridge shoulder surface.

[0023] That is, the ridge forming body 4 shown in Figures 1 to 3 comprises a rotating body 41, which is a base body that rotates in a predetermined direction, for example around the rotation center axis X, eight ridge side forming plates 42 made of metal and each of the same shape that are fixed to the rotating body 41 so as to be positioned side by side in the rotation direction, and eight ridge top surface forming plates (elastic plates that can be elastically deformed) 43 made of synthetic resin and each of the same shape that are detachably attached to the rotating body 41 so as to be positioned side by side in the rotation direction.

[0024] The rotor 41 has a first mounting portion 46 in the shape of a truncated cone cylinder centered on the central axis of rotation X, and a second mounting portion 47 in the shape of a cylinder provided on the reduced diameter end side of the first mounting portion 46 and centered on the central axis of rotation X. A plurality of mounting holes 48 are formed in the second mounting portion 47. Note that a plurality of mounting holes 49 corresponding to the mounting holes 48 are also formed in the ridge top surface forming plate 43.

[0025] The ridge side surface forming plate 42 is fixed to the outer peripheral surface of the first mounting portion 46 of the rotating body 41 by welding or the like. On the other hand, the ridge top surface forming plate 43 is detachably attached to the outer peripheral surface (cylindrical surface) of the second mounting portion 47 of the rotating body 41 by a longitudinal mounting member (mounting fixture) 50.

[0026] In other words, the claw portion 51 of the mounting member 50 is removably inserted into the mounting hole 49 of the ridge top surface forming plate 43 and the mounting hole 48 of the second mounting portion 47, thereby mounting the ridge top surface forming plate 43 to the outer peripheral surface of the second mounting portion 47.

[0027] In this mounted state, the ridge top surface forming plate (elastic plate) 43 is in a state of slight elastic deformation radially outward as a contact portion 52, which is part of its inner surface, contacts the mounting member 50 (see Figure 3). In addition, in this mounted state, the distance of the ridge top surface forming plate 43 from the rotation center axis X gradually increases from the front end side in the rotation direction to the rear end side in the rotation direction, so that the rear side in the rotation direction pushes in the soil.

[0028] 4 to 6, the ridge-top-surface forming plate 43 is formed into a curved shape that is approximately rectangular in plan view, for example, from a single elastically deformable synthetic resin plate (vane plate). The ridge-top-surface forming plate 43 shown in FIGS. 4 and 5 is in a state before attachment to the rotor 41 (a state before elastic deformation). Also, FIG. 6 is an expanded cross-sectional view taken along line AA in FIG. 4, showing the AA portion of the ridge-top-surface forming plate 43 expanded into a plane. However, in reality, the AA portion is not flat, but rather has a curved shape in which the distance from the rotation center axis X gradually increases toward the larger-diameter end of the ridge shoulder surface forming portion 62.

[0029] The ridge top surface forming plate 43 is composed of a ridge top surface forming part (upper surface ridge leveling part) 61 which compacts the embankment to form the ridge top surface, and a ridge shoulder surface forming part (shoulder leveling part) 62 which is connected to the end (inner end) of this ridge top surface forming part 61 on the ridge side surface forming plate 42 side and which compacts the embankment to form the ridge shoulder surface.

[0030] The ridge top surface forming portion 61 has a curved thickness changing portion 63 in which the thickness dimension changes, and a curved constant thickness portion 64 connected to the front end portion of the thickness changing portion 63 in the rotational direction and in which the thickness dimension does not change and is constant.

[0031] In other words, the ridge top surface forming portion 61 has a constant plate thickness portion 64 which is an attachment portion on the front side of the ridge top surface forming portion 61 in the rotation direction, and a variable plate thickness portion 63 on the rear side of the ridge top surface forming portion 61 in the rotation direction.

[0032] The boundary line L (the two-dot chain line in the figure) between the constant thickness portion 64 and the varying thickness portion 63 is located parallel (including approximately parallel) to the front edge of the constant thickness portion 64 in the rotational direction in a plan view. The position of the boundary line L is 30% to 50% of the way from the front end of the ridge top surface forming portion 61 in the rotational direction toward the rear in the rotational direction. In other words, the varying thickness portion 63 is a plate-like portion that is the same size as or larger than the constant thickness portion 64.

[0033] A plurality of (for example, four) elongated mounting holes 49 are formed in the uniform thickness portion 64. The thickness dimension of the uniform thickness portion 64 is the same throughout the uniform thickness portion 64 (excluding the mounting hole portions).

[0034] The thickness varying portion 63 is formed in a shape such that its thickness gradually increases from the front end in the rotational direction to the rear end in the rotational direction. In other words, the thickness of the thickness varying portion 63 gradually increases in the counter-rotational direction from the front end in the rotational direction of the thickness varying portion 63 to the rear end in the rotational direction of the thickness varying portion 63. The thickness of the front end in the rotational direction of the thickness varying portion 63 is the same as the thickness of the constant thickness portion 64.

[0035] 5, the inner surface 63a of the thickness changing portion 63 is formed as an arcuate surface having a first radius of curvature R1 centered on a first central point O1. The outer surface 63b of the thickness changing portion is formed as an arcuate surface having a second radius of curvature R2 centered on a second central point O2 different from the first central point O1. The second radius of curvature R2 is larger than the first radius of curvature R1 (R2>R1).

[0036] The inner surface 64a of the uniform thickness portion 64 is formed as an arcuate surface having a third radius of curvature R3 centered on the third central point O3. The outer surface 64b of the uniform thickness portion 64 is formed as an arcuate surface having a fourth radius of curvature R4 centered on a fourth central point O4, which is the same as the third central point O3. The fourth radius of curvature R4 is larger than the third radius of curvature R3 (R4>R3). The first central point O1, the third central point O3, and the fourth central point O4 are located on the boundary line L, but the second central point O2 is located offset from the boundary line L. The third central point O3 and the fourth central point O4 are located on the central axis of rotation X.

[0037] Furthermore, a corner portion (curved corner surface) 65 on the outer surface side at the rear end portion in the rotation direction of the thickness changing portion 63 is formed in the shape of an arcuate surface having a fifth radius of curvature R5 centered on the fifth center point O5.

[0038] The first curvature radius R1 is, for example, 110 mm, the second curvature radius R2 is, for example, 118 mm, the third curvature radius R3 is, for example, 100 mm, the fourth curvature radius R4 is, for example, 103 mm, and the fifth curvature radius R5 is, for example, 3 mm. The inner surface 63a of the thickness varying portion 63 and the inner surface 64a of the constant thickness portion 64 are smoothly connected. Similarly, the outer surface 63b of the thickness varying portion 63 and the outer surface 64b of the constant thickness portion 64 are smoothly connected.

[0039] The ridge shoulder surface forming portion 62 has a curved constant thickness portion 71 whose thickness dimension is the same as that of the constant thickness portion 64 of the ridge top surface forming portion 61, and a curved variable thickness portion 72 (the portion shaded in Figure 4) connected to this constant thickness portion 71.

[0040] The thickness-changing portion 72 is a curvature transition portion that smoothly changes curvature from the thickness-changing portion 63 of the ridge top surface forming portion 61 toward the constant thickness portion 71 of the ridge shoulder surface forming portion 62. The thickness-changing portion 72 is formed in a shape such that the thickness dimension gradually decreases from the thickness-changing portion 63 side of the ridge top surface forming portion 61 toward the constant thickness portion 71 side of the ridge shoulder surface forming portion 62 (see FIG. 6).

[0041] As shown in Figure 6, the outer corner portion (curved corner surface) 73 at the inner end portion (longitudinal end portion), which is the end portion of the constant plate thickness portion 71 on the ridge side forming plate 42 side, is formed into an arc-shaped surface having a sixth radius of curvature R6 centered on the sixth center point O6.

[0042] The sixth radius of curvature R6 is, for example, 0.5 mm. The fifth radius of curvature R5 (for example, 3 mm) is three times or more the sixth radius of curvature R6, i.e., for example, four to eight times, and preferably six times. In other words, the arcuate surface of the outer corner 73 at the inner end of the constant thickness portion 71 is curved with the sixth radius of curvature R6, and the arcuate surface of the outer corner 65 at the rear end in the rotation direction of the varying thickness portion 63 is curved with the fifth radius of curvature R5, which is at least three times the sixth radius of curvature R6.

[0043] The rear end of the thickness varying portion 72 in the rotational direction is formed in an arc shape that smoothly connects the rear end of the thickness varying portion 63 in the rotational direction and the rear end of the constant thickness portion 71 in the rotational direction.

[0044] Next, the operation of the ridge coating machine 1 will be described.

[0045] When the tractor is driven with the ridge coating machine 1 connected to the rear thereof, the ridge coating work unit 10 of the ridge coating machine 1 moves in the direction of travel to perform ridge coating work.

[0046] Specifically, the top surface scraping body 5 scrapes the top surface of the ridge (original ridge), the earth-filling body 3 tills and piles up the soil on the rice field surface and the ridge (original ridge), and the ridge forming body 4 compacts the piled-up soil to form a ridge (new ridge).

[0047] At this time, the ridge side forming plate 42 of the ridge forming body 4 rotates in a predetermined direction around the rotation center axis (rotation center) X, compacting the embankment by strongly pushing the soil in on the rear side in the rotation direction to form the ridge side, and the ridge top surface forming plate 43 of the ridge forming body 4 rotates in a predetermined direction around the rotation center axis X, compacting the embankment by strongly pushing the soil in on the rear side in the rotation direction to form the ridge top surface and ridge shoulder surface.

[0048] Furthermore, according to the ridge coating machine 1, the ridge top surface forming plate 43 of the ridge forming body 4 has a curved plate thickness changing portion 63 at least on the rear side in the rotational direction, where the plate thickness dimension changes, and this plate thickness changing portion (wear portion) 63 is formed in a shape where the plate thickness dimension gradually increases from the front end in the rotational direction to the rear end in the rotational direction, thereby achieving improved durability (longer life) compared to conventional configurations.

[0049] Moreover, the outer corner 65 at the rear end in the rotation direction of the thickness-changing portion 63 is formed in a gentle, predetermined arc shape, so the embankment is not scraped away by the sharp corner, but can be smoothly pressed in and applied by the arc-shaped corner 65, resulting in a good finish.

[0050] In the above embodiment, a configuration was described in which the ridge forming plate having a thickness-changing portion is a ridge top surface forming plate, but it may also be a configuration in which the ridge forming plate is a ridge side surface forming plate, i.e., a configuration in which the ridge side surface forming plate has a thickness-changing portion, or a configuration in which both the ridge side surface forming plate and the ridge top surface forming plate have thickness-changing portions.

[0051] Furthermore, the ridge forming plate is not limited to a configuration having a variable thickness portion and a constant thickness portion, but may be configured to have, for example, only a variable thickness portion.

[0052] Furthermore, the ridge forming plate is preferably an elastic plate made of an elastically deformable synthetic resin, but the material is optional and may be metal or the like. [Explanation of symbols]

[0053] 1 Ridge coating machine 2 aircraft 3 Embankment 4 Ridge forming body 41 Rotating body 43 Ridge top forming plate, which is a ridge forming plate 63 Plate thickness change area 63a Inner surface 63b External surface 64 Constant thickness section 65 Corner O1 1st center point O2 2nd center point R1 1st radius of curvature R2 Second radius of curvature

Claims

1. A ridge forming plate used in a ridge forming body that performs ridge forming work while rotating, At least a part of the plate has a curved thickness changing portion in which the plate thickness dimension changes, The thickness varying portion is formed in a shape in which the thickness dimension gradually increases from a front end portion in a rotation direction to a rear end portion in the rotation direction, The inner surface of the plate thickness changing portion is formed into an arcuate surface having a first radius of curvature centered on a first center point, The outer surface of the plate thickness changing portion is formed into an arcuate surface having a second radius of curvature centered at a second center point different from the first center point, The second radius of curvature is greater than the first radius of curvature. A ridge forming plate characterized by:

2. A ridge forming plate used in a ridge forming body that performs ridge forming work while rotating, A curved thickness changing portion in which the thickness dimension changes; A plate thickness constant portion is provided adjacent to a front end portion of the plate thickness changing portion in the rotation direction, The thickness varying portion is formed in a shape in which the thickness dimension gradually increases from a front end portion in a rotation direction to a rear end portion in the rotation direction, The inner surface of the plate thickness changing portion is formed into an arcuate surface having a first radius of curvature centered on a first center point, The outer surface of the plate thickness changing portion is formed into an arcuate surface having a second radius of curvature centered at a second center point different from the first center point, The second radius of curvature is greater than the first radius of curvature. A ridge forming plate characterized by:

3. The outer corner of the rear end of the thickness changing portion in the rotation direction is formed in an arcuate shape.

3. The ridge forming plate according to claim 1 or 2.

4. Ridge top forming board or ridge side forming board 4. The ridge forming plate according to claim 1, wherein the ridge forming plate is a ridge forming plate.

5. a rotating body that rotates in a predetermined direction; a plurality of ridge forming plates according to any one of claims 1 to 4 provided on the rotating body; A ridge forming body comprising:

6. A machine body coupled to a traveling vehicle; An embankment provided on the aircraft body; The ridge forming member according to claim 5, which is provided on the airframe; A furrow coating machine comprising:

7. A machine body coupled to a traveling vehicle; An embankment body that is provided on the machine body and performs embankment work while rotating; a ridge forming body that is provided on the machine body and performs ridge forming work while rotating, The ridge forming body is a rotating body that rotates in a predetermined direction; a plurality of ridge side forming plates provided on the rotating body and configured to compact the embankment formed by the embankment body to form ridge sides; a plurality of ridge top surface forming plates provided on the rotating body and configured to compact the embankment formed by the embankment body to form a ridge top surface; The ridge top surface forming plate has a curved plate thickness changing portion whose plate thickness dimension changes, The thickness varying portion is formed in a shape in which the thickness dimension gradually increases from a front end portion in a rotation direction to a rear end portion in the rotation direction, The inner surface of the plate thickness changing portion is formed into an arcuate surface having a first radius of curvature centered on a first center point, The outer surface of the plate thickness changing portion is formed into an arcuate surface having a second radius of curvature centered at a second center point different from the first center point, The second radius of curvature is greater than the first radius of curvature. A ridge coating machine characterized by:

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