Excavating machine

Abstract

To provide a work machine capable of properly working in a trench by preventing soil and sand from remaining in the trench while suppressing exposure of a rotating part.SOLUTION: A work machine D comprises: an auger 44 that can scrape off and throw objects by rotating; an auger case 4 that supports the auger 44 and has a side plate 43 that covers a side part of the auger 44; and a longitudinally long guide member 66 that is provided on the outside with respect to a width of the side plate 44 in an advancing direction, and has a curved portion with a tip curved inward.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] This invention relates to a working machine. Specifically, it relates to a working device for removing sand and mud deposited in a groove such as a laid side groove.

Background Art

[0002] As a working machine for removing earth and sand deposited in a groove such as a side groove that has already been laid, Patent Document 1 is disclosed. The working machine of Patent Document 1 has a first arm, a second arm, a third arm, and a fourth arm continuously connected from a self-propelled vehicle, and a cleaning tool having a blower wheel and a chute for discharging soil at the tip of the fourth arm. By configuring it in this way, it scrapes out earth and sand deposited in a groove such as an open drain or a road side groove located at a position away from the self-propelled vehicle, and throws and discharges the scraped earth and sand outside the groove. This cleaning tool is provided with a cover that exposes the front lower part and the side in the advancing direction of the blower wheel. Patent Document 2 discloses an invention of a snow removal machine in which the object to be thrown is snow instead of earth and sand. The auger housing covering the auger paddle in this document exposes only the front and the lower part.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0004] When the cleaning tool described in Patent Document 1 is positioned inside a groove, the rotating impeller, which is exposed on the side, may come into contact with the groove wall. This contact by the impeller may damage the groove wall. Let's also consider the case where, instead of the cleaning tool in Patent Document 1, a working unit (auger paddle and auger housing) of the form described in Patent Document 2 is applied and positioned inside the groove. In this case, since the auger paddle is covered by the auger housing except for the front, damage to the groove wall by the rotating object can be suppressed. On the other hand, compared to the cleaning tool in Patent Document 1, the working width of the auger paddle must be made even smaller than the width of the groove. As a result, when scraping the soil accumulated in the groove with the auger paddle, a gap is created between the working width of the auger paddle and the wall, and there is a problem that soil remains in the groove.

[0005] This invention was made in view of the above-mentioned problems, and aims to provide a work machine that can properly operate within a trench while suppressing the exposure of rotating parts and preventing soil and sand from remaining in the trench. [Means for solving the problem]

[0006] This invention is In a work machine having a work section that is placed in a groove such as a laid side ditch, An auger that can scrape and throw objects by rotating, An auger case having side plates that support the auger and cover the sides of the auger, A guide member that is long in the front-rear direction and is provided on the outside of the width in the direction of travel of the side plate, and has a curved portion at its tip that curves inward, Equipped with 、 The guide member further, By contacting the groove side, which is the wall surface along its longer direction, the auger case is positioned correctly in line with the groove direction. A work machine characterized by, It relates to.

[0007] This invention further, The auger case is placed in a groove such as a drainage ditch. The guide member is capable of contacting the groove side of the groove. A work machine characterized by, relates to

[0008] This invention further The side plate includes an inclined plate portion inclined so as to face outward in the width direction with respect to the traveling direction as it goes forward at the front portion of the side plate. The inclined plate portion includes an inclined plate front end portion inclined so as to face backward with respect to the traveling direction as it goes from above to below. The guide member is provided at a position protruding forward in the traveling direction from the front end of the inclined plate. A working machine characterized by relates to

[0009] This invention further A scraper provided in front of the auger and inclined so that the rear side is higher than the front side with respect to the front side is provided. The curved portion is provided at a position protruding forward in the traveling direction from the front end of the scraper. A working machine characterized by relates to

Effect of the Invention

[0010] This invention provides a working machine that can prevent the remaining of earth and sand in the groove while suppressing the exposure of the rotating object and can perform proper work in the groove.

Brief Description of the Drawings

[0011] [Figure 1] It is a plan view of a working machine according to an embodiment of this invention. [Figure 2] It is a side view of a working machine according to an embodiment of this invention. [Figure 3] It is a front view of a working machine according to an embodiment of this invention. [Figure 4] It is a side sectional view of a working machine according to an embodiment of this invention. [Figure 5] It is an enlarged side view of a main part of a working machine according to an embodiment of this invention. [Figure 6] ​A plan view of a working machine according to an embodiment of the present invention, which is a plan view of the auger case of the auger section cut in cross-section. [Figure 7] An explanatory view of a working machine according to an embodiment of the present invention, showing a mechanism for generating a scraper rocking vibration. [Figure 8] An enlarged side view of a main part of a working machine according to an embodiment of the present invention, showing the trajectory of the rocking (vibration) of the tip of the scraper. [Figure 9] An explanatory view of a working machine according to an embodiment of the present invention, showing the state of rotation about the first to third axes. Note that the attachment / detachment part is not shown. [Figure 10] An explanatory view of a working machine according to an embodiment of the present invention, showing the state of rotation about the first to third axes. Note that the attachment / detachment part is not shown. [Figure 11] An explanatory view of a working machine according to an embodiment of the present invention, showing the state of rotation about the first to third axes. Note that the attachment / detachment part is not shown. [Figure 12] A plan view of a working machine according to an embodiment of the present invention, which is a plan view of the side where it is attached to the boom device attached to the traveling body. [Figure 13] A side view of a working machine according to an embodiment of the present invention, which is an example of being attached to the boom device attached to the traveling body, and is a view seen from the left side in the traveling direction. [Figure 14] A rear view of a working machine according to an embodiment of the present invention, which is an example of being attached to the boom device attached to the traveling body, and is a view seen from the rear in the traveling direction. [Figure 15] A plan view of a working machine according to an embodiment of the present invention, showing an example of being attached to the boom device attached to the traveling body, and showing the case where the traveling body moves away from the groove portion and travels parallel to the direction of the groove. [Figure 16] A plan view of a working machine according to an embodiment of the present invention, which is a plan view of an example of being attached to the boom device attached to the traveling body, and shows the case where there is an angular difference between the direction of the groove and the traveling direction of the traveling body in the left-right direction. [Figure 17]This is a side view of a work machine according to an embodiment of the present invention, showing an example in which it is mounted on a boom device attached to a traveling machine, and illustrating the case where the orientation of the groove in the vertical direction and the orientation of the traveling machine are different. [Modes for carrying out the invention]

[0012] An embodiment of this invention will be described with reference to the drawings. A is a mobile unit. In this embodiment, mobile unit A consists of a tractor. B is a boom device. The boom device B is attached to the traveling machine A, as shown in Figures 12 to 17.

[0013] C is a groove or groove section. Groove C consists of a laid side ditch, etc. C1 is the bottom of the groove, and C2 is the side of the groove. As shown in Figure 14, W is the discharged material W, such as sand and mud, that is discharged from the trench C by the work machine. The discharged material W, consisting of sand and mud, accumulates in the trench C. D is a work machine. Work machine D is a device that is installed in a drainage ditch C, such as a side ditch, to remove waste W consisting of sand and mud accumulated in the ditch C.

[0014] The work machine D has a detachable part 1, a second member 2, and a work section 3. The detachable part 1, as shown in Figures 1 and 2, has a trough-like cross-section with an open top. In this embodiment, the trough-like shape is oriented in the left-right direction, intersecting the direction of travel. The work machine D A detachable attachment part 1 is provided on the work machine D, which allows the boom device B to be easily attached to the tip of the boom device B. The tip of the boom device B is fitted into the detachable attachment part 1, as shown in Figures 12 to 17, to secure the boom device B and the work machine D together. Therefore, the boom device B can be equipped with and detached from a different type of work machine D than that described in the present invention.

[0015] 11 is the first shaft. The first shaft 11 is provided on the first member 15 that constitutes the work machine D, below the attachment / detachment part 1 provided on the work machine D, and in the width direction which is the left-right horizontal direction with respect to the direction of travel. The first shaft 11 is fixed to the attachment / detachment part 1 via the first shaft holding part 12 provided at the lower part of the attachment / detachment part 1.

[0016] The first member 15 has one end connected to the first shaft 11, and the front end of the first member 15 is capable of vertical rotation and vertical pivoting relative to the first shaft 11. The first member 15 includes a first restricting section 13 that restricts the rotation range of the first member 15, and a second restricting section 14 that restricts the rotation range of the second member 2 relative to the first member 15.

[0017] First restricting sections 13 are provided at the front and rear of the first shaft 11. The first restricting section 13 consists of a downward rotation restricting section 131 and an upward rotation braking section 132. The downward rotation restricting portion 131 is located on the front side of the first shaft 11 and restricts the rotation of the first member 15 by contacting the lower surface of the attachment / detachment portion 1 when the rear end of the first member 15 rotates downward around the first shaft 11. The upward rotation restricting portion 132 is located on the rear side of the first shaft 11 and restricts the rotation of the first member 15 by contacting the rear surface of the attachment / detachment portion 1 when the rear end of the first member 15 rotates upward around the first shaft 11. The first restricting portion 132 provides a range within which the first member 15 can rotate. The range within which the first member 15 can rotate can be set to any range by adjusting the distance between the first restricting portion 13 and the attachment / detachment portion 1.

[0018] 21 is the second axis. 2 is the second member. The second member 2 consists of an elongated body that is long in the forward and backward directions of travel, as shown in Figures 1, 2, 4, and 5. The second shaft 21 is located at the other end, which is the rear end of the first member 15, and is provided in the vertical direction (up and down direction) intersecting with the first shaft 11, connecting the first member 15 and the second member 2.

[0019] The second member 2 is a long member that has one end attached to the second shaft 21 and extends rearward from the second shaft 21. The second member 2 is rotatably connected to the second shaft 21 and can pivot and rotate in the left-right direction, which is the direction that intersects with the first member 15, with the second shaft 21 as the axis of rotation. The second axis 21 is movable up and down with the first axis 11 as its pivot point.

[0020] The second restricting section 14 is provided on both the left and right sides of the first member 15, near the second axis 21. The second restricting section 14 restricts the swivel range of the second member 2. The second restricting section 14 prevents the second member 2 from rotating without restraint. The swivel range of the second member 2 can be set to any range by adjusting the distance between the second restricting section 14 and the second member 2.

[0021] 22 is the third axis. The third axis 22 is provided spaced apart from the second axis 21. The third axis 22 is positioned parallel to the second axis 21 and has a different end attached to it than the end of the second member 2 that is attached to the second axis 21.

[0022] 23 is a third restricting section. The third restricting section 23 is provided on both the left and right sides of the third shaft 22, which is in the vicinity of the third shaft 22. The third restricting section 23 restricts the rotation range of the second member 2 relative to the work section 3, or the rotation range of the work section 3 relative to the second member 2. The third restricting section 23 prevents the second member 2 and the work section 3 from rotating freely relative to each other. The rotation range of the work section 3 relative to the second member 2 can be set to any range by adjusting the distance between the third restricting section 23 and the second member 2.

[0023] The work unit 3 is located behind the first shaft 11 in the direction of travel and below the first shaft 11. The work unit 3 is located behind the second shaft 21 in the direction of travel. The work section 3 is positioned below the rear end of the second member 2. The work section 3 has a third shaft 22 positioned at its upper part, which connects to the rear end of the second member 2. The work section 3 is rotatable in the left-right direction relative to the second member 2, with the third shaft 22 as the axis of rotation. The working section 3 includes a third restricting section 23 that restricts the rotation range of the working section 3 relative to the second member 2. The work unit 3 is positioned within the groove C as shown in Figures 12 to 17. The work unit 3 is located behind the attachment / detachment unit 1 and is pulled by the attachment / detachment unit 1 via the first member 15 and the second member 2.

[0024] Since the work unit 3 is rotatable up and down with the first shaft 11 as a pivot point, the detachable part 1 and the work unit 3 can be positioned at a relative incline. Figure 17 is a side view of an embodiment of a work machine, showing an example where it is mounted on a boom device attached to a traveling machine, and the diagram will be explained in which the orientation of the groove in the vertical direction and the orientation of the traveling machine are different. During operation, even if the slope of the gutter and the road surface on which the machine travels are relatively inclined in the vertical direction along the direction of travel, the work unit 3 can be aligned with the slope of the gutter on one side, as shown in Figure 17. Therefore, even if there is a difference in the inclines of the two, work can be performed without worrying about the angle of the front-to-back incline of the work unit 3. As can be seen by comparing Figure 17 with Figure 13, at point E, the lower surface of the detachable part 1 abuts against the downward rotation restricting part 131 of the first restricting part 13, and by abutting against the lower surface of the detachable part 1, the rotation of the first member 15 is restricted. l4 is the running surface of the mobile unit A.

[0025] The work unit 3, positioned within the groove C, is towed by the detachable part 1 at the front, allowing it to move along the wall surface of the groove C without the need for a special drive device. When moving along the groove side C2, which is the wall surface of the groove C, the rod-shaped guide member 66 (or the curved portion 67 of the guide member 66) provided on the side of the work unit 3 comes into contact with the groove side C2, preventing damage to the work unit 3 body.

[0026] The work unit 3 is rotatable relative to the attachment / detachment unit 1 by two axes, the second shaft 21 and the third shaft 22. Even if the side ditches and the traveling machine body, which are arranged parallel to each other, move closer or further apart, the second member 2, which rotates on the second shaft 21 and the third shaft 22, can absorb the difference in distance. Since there is no angle between the attachment / detachment section 1 and the work section 3 with respect to the direction of travel, and they can move in parallel while maintaining a parallel angle to each other, the operator does not need to frequently steer the mobile machine, making operation easier.

[0027] As illustrated in Figure 12, a plan view of the side attached to the boom device B mounted on the traveling machine A; Figure 13, an example of the boom device B mounted on the traveling machine A, viewed from the left in the direction of travel; and Figure 14, an example of the boom device B mounted on the traveling machine A, viewed from the rear in the direction of travel, the operation is not limited to situations where there is no relative angular difference between the traveling machine A and the work machine D in the left-right direction with respect to the direction of travel. As shown in Figure 16, even if there is a relative angular difference between the groove C and the direction of travel of the mobile body in the left-right direction relative to the direction of travel, the work unit 3 can be made to have a relative angular difference with respect to the left-right direction of travel relative to the mounting position by either the second member 2 and the work unit 3 located on the second axis 21 and the third axis 22 rotating more than the other, or by the second member 2 and the work unit 3 each rotating in the same direction in a plan view.

[0028] Figures 9, 10, and 11 are explanatory diagrams of the work machine according to the embodiment, showing how it rotates on the first to third axes. l2 is the orientation of the work unit 3. l3 is the orientation of the traveling body A or the attachment / detachment unit 1. In either case, the attachment / detachment unit 1 and the work unit 3 can rotate in the relative left-right direction, enabling work. This plan view shows an example of the boom device being attached to a traveling machine, and even when the traveling machine is away from the groove and traveling parallel to the direction of the groove, as shown in Figure 15, operation is still possible. The working part 3 moves in the left-right direction relative to the attachment / detachment part 1, so even if there is a difference in the relative left-right distance between the parallel grooves C and the traveling machine A, this difference can be absorbed.

[0029] Figure 16 illustrates a plan view of a work machine, specifically a plan view of an example where the boom device is attached to a traveling machine body, and there is a case where the direction of the groove and the direction of travel of the traveling machine body have an angle difference in the left-right direction. Even in this case, the difference in left-right angle between the groove C and the traveling machine body A can be absorbed. In other words, even if there is an angle difference between the left-right direction of travel of the non-parallel mobile body A and the left-right direction of the groove C, the detachable part 1 and the working part 3 can rotate in the relative left-right direction, thereby absorbing the difference in left-right angle between the groove C and the mobile body A. Therefore, the operator does not need to frequently operate the control devices to steer the mobile body A, making operation easier.

[0030] The rotation angles of the first member 15, the second member 2, and the work section 3 are restricted by the first restricting section 13, the second restricting section 14, and the third restricting section 23, so that the positional relationship of the work section 3 with respect to the attachment / detachment section 1 can be limited. In other words, even when the work section 3 is located outside the groove C, the work section 3 can be positioned with respect to the attachment / detachment section 1, and it is easy to position the work section 3 inside the groove C using the boom device B.

[0031] This work machine D is positioned in a ditch C, such as a laid side ditch C, and performs the task of removing and discharging accumulated soil, mud, etc., from the ditch C. In this embodiment, the work machine D is attached to the tip of the boom device B, and by deploying this boom device B, it is possible to work in a ditch C located far away from the traveling machine A. Since the first shaft 11, the second shaft 21, and the third shaft 22 are located above the groove C, the groove C does not obstruct the rotation of the first member 15, the second member 2, and the working section 3.

[0032] The configuration of work unit 3 will be explained. 4 is the auger case that constitutes the work section 3. As shown in Figures 3 and 4, the auger case 4 is a box-shaped structure with the front and bottom open, and is installed in the work section 3 located in the groove C. The auger 44 is installed inside the auger case 4.

[0033] As shown in Figures 2 and 4, the rear surface of the auger case 4 is curved in an arc along the rotating outer circumference of the auger 44. This curved surface is positioned close to the rotating outer circumference of the auger 44. Therefore, it is possible to prevent the object W, which moves backward and then upward, from leaking out radially due to the auger 44.

[0034] The lower part of the auger case 4 is open, and the lower end of the curved surface on the rear of the auger case 4 is directed forward and downward. The lower end of the curved surface is positioned at approximately the same level as, or slightly higher than, the lower end of the rotating outer circumference of the auger 44. As the auger case 4 moves forward, the lower end moves relative to the bottom of the groove C1, allowing it to scoop up any object W remaining at the bottom of the groove C1 without being moved by the auger 44. Subsequently, the object W placed on the curved surface on the rear of the auger case 4 is moved upward by the auger 44 (central scraping section 442). The auger case 4 has side plates 43 that can support the rotating shaft 41 and cover the left and right sides of the auger 44.

[0035] 41 is a rotating shaft. The rotating shaft 41 is an axis positioned horizontally in the auger case 4 and is driven to rotate. In this embodiment, the rotating shaft 41 transmits the rotational power of a motor 51, which is located outside the auger case 4 at the rear of the auger case 4, to a pulley 52 fixed integrally with the rotating shaft 41 on the side of the auger case 4, via a transmission member such as a belt 53 or a chain. The motor 51 can be electric or hydraulic.

[0036] 42 is a bearing or bearing section. 45 is a support arm. The auger 44 is equipped with a support arm 45 which is fixed integrally with the rotating shaft 41. The bearing 42 supports the rotating shaft 41 within the auger case 4. Since the bearing 42 is located inside the auger case side plate 43, it is prevented from protruding outward from the auger case 4. The long, plate-shaped support arm 45, which connects and fixes the rotating shaft 41 to the side scraping portion 441 of the auger 44, has one end fixed at a joint 444 provided in the middle of the side scraping portion 441, and the other end fixed near the bearing 42. As a result, the bearing 42 directly receives the load applied to the rotating shaft 41 by the side scraping portion 441, thereby reducing the moment load on the rotating shaft 41 and preventing damage to the rotating shaft 41.

[0037] The auger 44 is positioned on the rotation axis 41 and rotates integrally with the rotation axis 41 to scrape up the object W and throw the object W. As shown in Figures 6 and 7, the auger 44 comprises a central scraping section 442 and lateral scraping sections 441 located on both sides of the central scraping section 442. The lateral scraping sections 441 and the central scraping section 442 are formed continuously and are fixed to the rotating shaft 41 by support arms 45. The central scraping section 442 is located in the middle of the rotation axis 41 of the auger 44, and is formed continuously from the side scraping sections 441. It also has a flat surface 442a facing in a direction perpendicular to the axial direction of the rotation axis 41.

[0038] Each of the side scraping sections 441, located to the left and right of the central scraping section 442 on the auger 44, is formed to be symmetrical with respect to the central scraping section 442. In this embodiment, the auger 44 is configured with two central scraping sections 442 and two side scraping sections 441 at equal intervals around the rotation axis 41 when viewed from the axial direction, but there is no limit to the number of these sections. The auger 44 rotates around a rotation axis 41, which is a horizontal axis oriented in the left-right direction relative to the direction of travel, thereby scraping up material W such as accumulated soil in front of the auger 44 and throwing it upward. In this embodiment, the direction of rotation of the auger 44 is such that, when viewed from the axial direction of the rotation axis 41, the upper side of the radial tip of the auger 44 rotates forward and the lower side rotates backward. In other words, it performs a down-cut.

[0039] The central scraping section 442 provided on the auger 44 will be explained further. The central scraping section 442 has a flat section 442a which is a plate-like structure formed on a flat surface. The width of the planar portion 442a of the central scraping portion 442, which faces a direction perpendicular to the axial direction of the rotation axis 41, in the direction parallel to the axial direction of the rotation axis 41, expands as it extends radially relative to the radial direction of the rotation axis 41. The planar portion 442a is formed continuously from the side scraping portion 441 through the intermediate portion 442b. The intermediate portion 442b connects the side scraping portion 441 and the planar portion 442a by a shape formed by continuously connecting one or more triangular planes with their vertices facing radially, as shown in Figures 3 and 4, or by a curved shape (not shown) in which the radius of curvature decreases as it extends radially from the rotation axis 41. Therefore, the planar portion 442a is formed in the shape of a triangle with the rotation axis 41 side as the vertex, or a trapezoid with the rotation axis 41 side as the shorter side.

[0040] As shown in Figure 2, the planar section 442a is formed such that, when viewed from the front in the rotational direction of the auger 44, the surface widens in the radial direction relative to the rotational radius. When an object W is thrown radially by centrifugal force, the object W moving along the planar section 442a can move smoothly in the radial direction. On the other hand, when the central scraping section 442 scrapes the object W in front of the auger 44, the planar section 442a, which widens in the radial direction, ensures that the central scraping section 442 has enough width to scrape the object W.

[0041] The width of the flat section 442a should preferably increase by approximately 1.5 to 2 times the width on the rotation axis 41 side as it moves toward the rotation radius. In this example, 1.8 times is used. The less contact area an object W has, the less friction it experiences, making it easier to move on the flat section 442a. The width of the flat section 442a in the rotation axis direction increases toward the radial direction, so when an object W on the flat section 442a moves radially due to centrifugal force, the opportunity for contact with the lateral intermediate section 442b and the lateral scraping section 441 is greatly reduced, preventing an increase in friction. Therefore, an object W located on the flat section 442a of the central scraping section 442 can be moved to the outer end of the flat section 442a in the radial direction by centrifugal force without generating unnecessary frictional force. Then, the object W that has reached the outer end of the flat section 442a leaves the flat section 442a and is thrown toward the chute 71 side. The outer circumference of the rotational area of ​​the auger 44, specifically the lateral scraping section 441 and the central scraping section 442, is formed so that there are no irregularities throughout the entire area. This reduces the risk of damaging the pre-formed groove C, which is the structure of the side ditch C, and allows for clean scraping of the object W at the bottom of the ditch C1.

[0042] The lateral scraping section 441 provided on the auger 44 will be explained further. As shown in Figure 2, the auger 44 is equipped with a side scraping section 441 that is inclined from the end of the rotating shaft 41 toward the middle of the rotating shaft 41. The side scraping sections 441, as shown in Figures 2, 3, 4, 6, and 7, are positioned at an angle such that, when viewed from a direction perpendicular to the rotation axis 41 (for example, from the front), their surfaces are inclined inward with respect to the axial direction of the rotation axis 41. The side scraping sections 441 can scrape and move towards the center soil at the ends of the working width, which is the width from left to right in the direction of travel and is the working width that the auger 44 can work with.

[0043] As shown in Figure 4, the entire tip of the lateral scraping portion 441 in the radial direction of rotation is formed to pass through the tip region relative to the radial direction of rotation of the auger 44 in a side view. That is, the lateral scraping portion 441 is formed in an arc shape in a side view. Therefore, during rotation, the lateral scraping portion 441 efficiently moves the object W to the center of the auger 44 by minimizing the gap with the bottom surface of the groove C located below the lateral scraping portion 441, and the lateral scraping portion 441 continuously moves the object W to the center of the auger 44 during rotation.

[0044] The side scraping portion 441 provided on the auger 44 is located on the end side of the rotating shaft 41 and has a sharpened portion 443 facing forward in the direction of rotation. The sharpened portion 443 is located on the end side of the rotating shaft 41 relative to the axial direction, relative to the support arm 45. The pointed portion 443 protrudes forward in the direction of rotation from the support arm 45 that fixes the side scraping portion 441 to the rotation axis 41. The pointed portion 443 becomes sharper as it extends radially with respect to the rotation radius.

[0045] As shown in Figure 4, in a side view, the width of the sharpened portion 443 provided by the side scraping portion 441 is set to be smaller than the width of the side scraping portion 441 on the central scraping portion 442 side. Therefore, an object W located directly below the sharpened portion 443 is easily pierced by the sharpened portion 443 when it rotates, and the object W moving relative to the auger 44 side in a continuous line as it moves can be separated. The pointed portion 443, viewed from a direction perpendicular to the axial direction of the rotation axis 41, is positioned closer to the side plate 43 of the auger case 4 than the joint portion 444 with the support arm 45, and is also located near the side plate 43. This prevents the support arm 45 from coming into contact with the auger case 4, and also maximizes the working width of the auger 44 within the auger case 4.

[0046] In addition to ensuring sufficient working width for the auger 44 and preventing damage to the rotating shaft 41, the rotation area of ​​the pointed portion 443 is positioned to move along the radial outer circumference of the bearing 42, so that the object W does not directly reach the bearing portion 42. Furthermore, since the tip of the pointed portion 443 rotates close to the auger case side plate 43, even if objects W such as soil adhere to the side plate 43, the pointed portion 443 scrapes them off, keeping the inside of the auger case 4 clean. The auger case 4 supports the rotating shaft 41 with the bearing portion 42, and the pointed portion 443 moves radially around the outer circumference of the bearing portion 42 by rotation, thereby enabling continuous operation of the auger 44 in an appropriate state.

[0047] As shown in Figure 4, the side scraping section 441 and the rotating shaft 41 each have a space S through which an object W can pass. If the amount of object W moved by the side scraping section 441 becomes excessive, it can escape to the end of the rotating shaft 41 through this space S. Therefore, it is not necessary to set an excessive rotational driving force when scraping the object W with the auger 44, thus preventing the entire device from becoming excessively large.

[0048] As shown in Figure 4, the width of the space S in the radial direction from the center of the rotation axis 41 to the tip of the space S in a side view is formed to gradually decrease from the sharp tip 443 toward the central scraping portion 442. In other words, in a side view, the radial working height of the side scraping section 441, from the center of the rotation axis 41 toward the radial tip, gradually increases from the pointed section 443 toward the central scraping section 442. By forming it in this way, the object W, which is gradually scraped up from the end side of the rotation axis 41 and increases in volume, can be moved toward the central scraping section 442 without being dropped by the side scraping section 441, which is pushed by an increasing working height.

[0049] On the other hand, if the volume of the object W moved by the side scraping portion 441 increases excessively, the object is released from the space S toward the rear in the rotational direction of the side scraping portion 441, thereby preventing excessive rotational load from being placed on the rotating shaft 41. Since the space S on the side of the lateral scraping section 441 towards the central scraping section 442 is made small, the amount of material leaking out from the lateral space S when an object W is thrown by the central scraping section 442 can be suppressed. The ratio of the space S to the width in the direction radially outward from the center of the rotation axis in a side view of the lateral scraping section 441 is such that, when the working height of the lateral scraping section 441 on the tip side of the sharp section 443 is set to 1, the width of the space S should be 1 to 1.5, and as you move from the sharp section 443 towards the central scraping section 442, the width of the space S should gradually change to 0.2 to 0.5, and the working height of the lateral scraping section 441 should change to about 1.5 to 1.8.

[0050] The central scraping section 442, which is formed continuously from the side scraping section 441, scrapes the object W in the central part of the working width of the auger 44, and throws the object W collected by the side scraping section 441 and the central scraping section 442 upward. The object W thrown by the central scraping section 442 is guided by a chute 71 located on the upper part of the auger 44, slightly behind the center of the auger case 4 in the width direction, and thrown out of the groove C.

[0051] Since the joint 444 between the side scraping portion 441 and the support arm 45 is located on the rear side in the rotational direction of the side scraping portion 441, it does not obstruct the movement of the object W on the front side in the rotational direction of the side scraping portion 441.

[0052] Let me explain the effects of Auger 44. When object W reaches the rotational region of the auger 44 and also reaches the sharp end 443, the sharp end 443 pierces it. Then object W is moved towards the central scraping portion 442 by the side scraping portion 441, or is slammed against the groove bottom C1 directly below the rotational region by the centrifugal force of the rotating sharp end 443. The object W, upon impact with the groove bottom C1, crumbles and becomes loosened. It is then moved again by the side scraping sections 441 in the width direction relative to the direction of travel along the groove bottom C1, reaching the central scraping section 442. Upon reaching the flat section 442a of the central scraping section 442, the object W is moved backward relative to the central scraping section 442, reaching the curved surface on the rear of the auger case 4. Subsequently, the object W is lifted upward along the curved surface by the flat section 442a of the central scraping section 442 and moved upward, while also being thrown upward via the chute 71.

[0053] When object W reaches the rotational area of ​​the auger 44 and also reaches the central scraping section 442, object W is moved backward relative to the central scraping section 442 and thrown upward. Alternatively, even if object W is slammed against the bottom of the groove C1 directly below the rotational area by the central scraping section 442, object W will be broken down by the impact, making it easy for the rotating central scraping section 442 to scrape it. Subsequently, object W is moved backward by the flat section 442a of the central scraping section 442 and reaches the curved surface on the rear of the auger case 4. After that, object W is lifted up along the curved surface by the flat section 442a of the central scraping section 442 and moved upward and thrown upward.

[0054] 61 is a scraper. The scraper 61 is a plate-shaped member and is installed at the bottom of the auger case 4, spanning across the width of the auger case 4. As shown in Figures 4, 6, and others, the scraper 61 is mounted in front of the auger 44, inclined so that the rear side is higher than the front side. The scraper 61 has a working width greater than the working width of the auger 44. The rear end of the scraper 61 is positioned near the outside of the rotation area of ​​the auger 44, and the rear end is mounted so that it overlaps with the rotation area of ​​the auger 44 in a plan view, as shown in Figure 6.

[0055] The front end 65 of the scraper 61 is positioned slightly above the lower end of the auger 44's rotational area or at the same height as the lower end of the auger 44's rotational area when viewed from the side in the direction of the auger 44's rotation axis 41. This prevents the front end 65 of the scraper, which protrudes downward and forward, from getting caught on small steps in the groove C during forward movement, thus preventing the work unit D from moving forward. In other words, the auger 44 is the lowest point of the work unit 3 and is in contact with the bottom of the groove C1, but the outer circumference of the rotating auger 44 is smooth and circular in side view, so it can overcome any steps.

[0056] The part 54 shown in Figures 1, 2, and 6 is an inclined plate section. In a plan view, the inclined plate section 54 is provided on the front part of the auger case side plate 43 and is inclined so as it extends forward, it moves outward in the width direction relative to the direction of travel. The front end of the inclined plate section, the inclined plate front end 55, is positioned outward in the width direction relative to the direction of travel from the end of the rotating shaft 41 and the side end of the scraper 61. In a side view, the front end 55 of the inclined plate section 54 is inclined so as it moves from top to bottom, it is inclined towards the rear relative to the direction of travel. The upper part of the front end 55 of the inclined plate is positioned to protrude forward from the front end 65 of the scraper 61. The front end 55 of the inclined plate section 54 configured as described above can come into contact with the groove side C2 of the groove C, and objects attached to the groove side C2 can be peeled off by the forward movement of the work machine D. A scraper 61 is positioned at the lower end of the inclined plate section 54, in front of the rotation area of ​​the auger 44. The scraper 61 can scoop up the object W on the bottom surface C1 of the groove and at the same time receive the object W that has been peeled off from the side of the groove C2 by the inclined plate section 54. The object W on the scraper 61 moves to the rear as the machine moves forward, and is then moved further rearward by the auger 44 and thrown.

[0057] The inclined plate section 54 of the present invention collects objects W, such as soil and other sediment, located to the outside and to the side of the working width of the auger 44, which has a working width narrower than the width of the groove C. It also peels off objects W attached to the groove side section C2, which is the wall surface of the groove C, and allows the auger 44 to collect and throw them away. The inclined plate section 54 is positioned in front of the rotation area of ​​the auger 44 in a side view, and is located in front of the side plate 43 of the auger case 4. The height of the inclined plate section 54 is set to be approximately the same as the height of the rotation area of ​​the auger 44. This allows the object W on the groove side C2 to be removed in advance before the advancing auger 44 reaches it.

[0058] The front end 55 of the inclined plate section 54 is positioned outward in the direction of travel from the end of the bearing section 42 that supports the rotation axis 41 of the auger 44. The front end 55 of the inclined plate is the part of the work machine D that protrudes furthest outward in the width direction. Therefore, the front end 55 of the inclined plate can retrieve objects W from the groove side section C2 that are outside the working width of the auger 44 and cannot be reached by the auger 44. In a side view, the front end 55 of the inclined plate is inclined so that it is angled backward relative to the direction of travel as it moves from top to bottom. As a result, the tip that is in contact with the groove side C2 can gradually scrape off the object W from above as it moves forward. Therefore, the resistance when scraping off the object W from the groove side C2 is reduced, and the front end 55 of the inclined plate does not deviate from the groove side C2 due to resistance. In other words, there is no residue left behind, and no object W adheres to the groove side C2 after it has been scraped off, resulting in a clean finish for the groove side C2. In a front view, the front end portion 55 of the inclined plate is inclined inward relative to the width in the direction of travel as it moves from top to bottom. The cross-section of the pre-formed groove C is formed to gradually narrow as it goes downward, so by aligning it with this, objects W on the groove side portion C2 can be efficiently and cleanly swept away.

[0059] 66 is a guide member. The guide member 66 is provided at the lower part of the work section 3 and on the outside of the side plate 43. The guide member 66 consists of an elongated member that extends in the front-rear direction. In this embodiment, it is formed using a round bar. The guide member 66 is located at the lower end of the inclined plate portion 54, and is positioned to pass at the same position as the lower end of the inclined plate portion 54, or slightly outside of it. The guide member 66 can move forward to pass at the same position as the lower end of the front end 55 of the inclined plate, or slightly outside the lower end of the front end 55 of the inclined plate. Since the guide member 66 is an elongated member that extends in the front-rear direction, this elongated direction comes into contact with the groove side C2, which is the wall surface, allowing the auger case 4 to be positioned in the correct position aligned with the groove C. When the work unit 3 is positioned in the groove C along the direction of travel, the guide member 66 comes into contact with the groove side C2 of the groove C and can guide the work unit 3 along the groove C. Therefore, the auger case 4, including the inclined plate section 54, can properly perform operations within the groove C.

[0060] Since the guide member 66 passes at the same position as or outside the lower end of the inclined plate portion 54, even if there are steps or irregularities on the groove side portion C2, which is the wall surface portion inside the groove C, it is possible to prevent the front end of the inclined plate portion 54 from getting caught on them and hindering the forward movement of the work machine D. Since the guide member 66 is located at the lower end of the inclined plate portion 54, even if the working machine D placed in the groove C, which has an inclined wall surface, is narrower than the width of the groove C, it will rise along the inclination of the groove side portion C2, preventing the working machine D from being damaged by becoming lodged in the narrow groove C.

[0061] 67 is a curved portion. The curved portion 67 is provided on the front end side of the guide member 66. As the curved portion 67 moves forward in the direction of travel, it curves inward relative to the width in the direction of travel from the front end 55 of the inclined plate, and the front end of the curved portion 67 is positioned to protrude forward from the front end 65 of the scraper and the front end 55 of the inclined plate. The tip of the guide member 66 has a curved portion 67 that curves inward. Even if there are irregularities on the wall surface of the groove C that the guide member 66 contacts, the auger case 4 can be guided without getting caught. Furthermore, even if the width of the groove C narrows, the curved portion 67 can sense this in advance, allowing the work machine D to rise along the groove side portion C2, which is the wall surface of the groove C.

[0062] Let me explain the scraper 61 further. Since the left and right sides of the scraper 61 are wider than the working width of the auger 44, the object W supplied to the auger 44 can be reliably peeled off from the groove bottom C1. The auger 44 can then scrape the lifted object W backward and move it. In other words, the aggregated object W does not enter the rotational area of ​​the auger 44 while still stuck to the groove bottom C1, thus preventing excessive load from being placed on the auger 44.

[0063] In this embodiment of the invention, the scraper 61 is located in front of the auger 44 and, as it moves forward, can pre-separate the hard-packed soil and other material object W from the bottom C1 of the groove C. If the scraper 61 is not present, the auger 44, being a rotating body, will scrape off the object W that is stuck to the bottom of the groove C1 and is hard and compacted. In this case, the auger 44 will be responsible for both peeling the stuck object W from the bottom of the groove C1 and crushing the hard object W, moving it towards the center and backward. As a result, the load required for rotation on the auger 44 will be large, and a large amount of energy will be needed to drive it.

[0064] The rear end of the scraper 61 is tilted forward and backward so as to float above the front end 65 of the scraper. Furthermore, this rear end is positioned in a location that overlaps with the rotational region of the auger 44 in a plan view. As a result, the object W that is lifted from the bottom of the groove C1 by the scraper 61 and reaches the auger 44 can be moved backward by the auger 44.

[0065] The scraper 61's front end 65 pre-separates the object W from the bottom of the groove C as it moves forward, thus eliminating the need for the auger 44 to separate it from the groove bottom surface C1. Since the rear end of the scraper 61 is located directly in front of the rotational area of ​​the auger 44, the detached object W, which is pushed out towards the rear end of the scraper 61 as the machine moves forward, can easily reach the auger 44.

[0066] Furthermore, the scraper 61 is equipped with a vibration mechanism to promote the separation of object W from the groove bottom surface C1. The vibration mechanism of the scraper 61 and the operation of the scraper will be described below. The scraper 61 is designed to vibrate in the forward / backward or up / down direction. Rods 62 are attached to both the left and right ends of the scraper 61, extending towards the rear. 63 is a support shaft, which is a support part. The support shaft 63 is a member that protrudes outward from the outer surface of the side plate 43. A through hole is provided on the side of the support shaft 63 through which the rod 62 passes and which can slidably hold the rod 62. In this embodiment, the support shaft 63 is made of a round bar, and its axial direction is oriented in the left-right direction relative to the direction of travel. A through hole is also provided in a direction intersecting the axial direction of the round bar. The support shaft 63 is provided on the auger case 4 and is parallel to the rotation shaft 41, and supports the rods 62 fixed to both the left and right ends of the scraper 61.

[0067] 64 is a camshaft. The camshaft 64 is located at the end of the rotating shaft 41 and rotates together with the rotating shaft 41, performing eccentric motion. The rod 62 connects the scraper 61 and the camshaft 64 via a support portion 63. A bearing 62a is provided at the rear end of the rod 62, and the rod 62 is connected to the camshaft 64 via this bearing 62a.

[0068] The rod 62 supports the scraper 61 by being supported by a support portion 63 provided on the side plate 43 of the auger case 4. The support portion 63 is rotatable on the side plate 43 with respect to the left-right axis. Furthermore, the rod 62 is made slidable in the longitudinal direction by the support portion 63. The rod 62 extends further rearward from the support portion 63 and reaches the rotating shaft 41. At the end of the rotating shaft 41 is a camshaft 64 which is fixed integrally with the rotating shaft 41, and the rear end of the rod 62 is connected to the camshaft 64 via a bearing 62a.

[0069] When the rotation axis 41 of the auger 44 rotates, the camshaft 64 also rotates together with it, causing eccentric motion. The rod 62, subjected to this eccentric motion, slides against the support portion 63, and its front side oscillates up and down with the support portion 63 as the pivot point. Consequently, the scraper 61 oscillates and vibrates in the front-rear direction in conjunction with the movement of the rod 62, and the front end portion 65 of the scraper 61 oscillates and vibrates up and down, as illustrated by solid and dashed lines in Figure 8. l1 is the oscillating trajectory of the tip of the scraper 61. The scraper 61, positioned between the object W and the groove bottom C1, enters the space between the object W and the groove bottom C1 by vibrating back and forth, scraping the object W away from the groove bottom C1, and thus peeling it off from the groove bottom. Furthermore, since the front end 65 of the scraper 61 vibrates up and down, it makes it even easier to peel the object W from the bottom of the groove. b1 is the lower end of the scraper 61. Due to the vertical vibration of the scraper 61, it vibrates vertically in the states shown by the solid line and the dashed line in Figure 8.

[0070] As the aircraft moves, the object W moves with its rearward orientation on the scraper 61, as if being pushed forward by the object W in front of it. The object W can be loosened by the forward-backward and vertical vibrations of the scraper 61. In other words, the hard, compacted soil and this mass can be loosened and softened by the vibration of the scraper 61. After that, the object W that reaches the auger 44 is collected by the side scraping section 441 and the central scraping section 442 and thrown upward. Since the object W has been loosened and softened, the auger 44 can move the object W towards the center in small amounts and throw it. Because the object W is moved in small amounts, the load and resistance on the rotation of the auger 44 can be reduced, and the increase in the energy required for driving can be suppressed.

[0071] 71 is a chute. 711 is a chute connection port. The upper center of the auger case 4 is provided with a cylindrical or U-shaped chute 71, and the upper part of the auger case 4 is open through the chute 71. Due to the central scraping section 442 of the auger 44 and the curved surface at the rear of the auger case 4, the object W, which moves upward with its radial direction closed, is released at the bottom of the chute 71. Then, the object W moves radially on the flat section 442a of the central scraping section 442 due to centrifugal force, passes through the chute connection port 711, and is guided into the chute 71 and thrown upward. In this example, the chute 71 is curved to the right in the direction of travel, and the trajectory of the object W thrown upward is corrected to the right. Therefore, the object W is thrown upward to the right. The trajectory of the thrown object W can be discharged in any direction by adjusting the curvature of the chute 71. [Explanation of Symbols]

[0072] 1. Detachable part 2. Second Member 3. Work area 4 Organizer Cases 44 Ogre 11 1st axis 13. First Regulatory Section 14. Second Regulatory Section 15. First Member 21 2nd axis 22 3rd axis 23 Third Regulatory Section 441 Side scraping section 442 Center scraping section 443 Sharp section 41 Rotation axis 43 Side panel 54 Inclined plate section 61 Scraper 66 Guide member C Groove D Work equipment

Claims

1. A work machine having a work section that is placed in a groove such as a laid side ditch, An auger that can scrape and throw objects by rotating, An auger case having side plates that support the auger and cover the sides of the auger, A guide member that is long in the front-rear direction and is provided on the outside of the width in the direction of travel of the side plate, and has a curved portion at its tip that curves inward, Equipped with, The guide member further, By contacting the groove side, which is the wall surface along its longer direction, the auger case is positioned correctly in line with the groove direction. A work machine characterized by the following features.

2. The auger case is placed in a groove such as a drainage ditch. The guide member is capable of contacting the groove side of the groove. The work machine according to feature 1.

3. The side plate is provided with an inclined plate portion at the front of the side plate that is inclined outward in the width direction relative to the direction of travel as it moves forward. The inclined plate section is provided with an inclined plate front end that is inclined so as it moves from above downwards, it moves towards the rear in relation to the direction of travel. The guide member is provided at a position that protrudes forward in the direction of travel from the front end of the inclined plate. The work machine according to feature 1 or 2.

4. The auger is provided with a scraper located in front of it, and inclined so that the rear side is superior to the front side. The curved portion is positioned to protrude forward in the direction of travel from the front end of the scraper. The work machine according to feature 1 or 2.

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