Excavation work machine

Abstract

To provide a work machine capable of excavating sediment in a trench while suppressing large-sizing.SOLUTION: A work machine D comprises: a rotation axis 41 rotatably disposed in an auger case 4 opened forward and downward; and an auger 44 disposed on the rotation axis 41 and rotating integrally with the rotation axis 41 to scrape an object and throw the object, wherein the auger 44 includes a side scraping portion 441 inclined from an end of the rotation axis 41 toward an intermediate part of the rotation axis 41, and a space through which the object can pass is formed between the side scraping portion 441 and the rotation axis 41.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a work machine, and more particularly to a work device for removing sand and mud accumulated in a groove such as a road gutter. [Background technology]

[0002] Patent Document 1 discloses a work machine for removing soil and sand accumulated in the grooves of already laid road gutters, etc. The work machine in Patent Document 1 has a first arm, a second arm, a third arm, and a fourth arm connected in series to a self-propelled vehicle, and is equipped with a cleaning tool at the tip of the fourth arm that has an impeller and a chute for removing soil. With this configuration, the device scoops out soil and sand that has accumulated in drainage culverts, road gutters, and other grooves located away from the self-propelled vehicle, and discharges the scooped out soil and sand outside the grooves. The self-propelled vehicle is said to scoop out the soil and sand while moving along the grooves. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Utility Model Application Publication No. 57-197581 Summary of the Invention [Problem to be solved by the invention]

[0004] The soil and sand that accumulates in the trenches are not necessarily submerged in water. In particular, in the case of side gutters that serve as irrigation facilities for supplying and draining water to agricultural land, water supply and drainage are stopped during the fallow period, so the soil and sand that accumulates in the trenches loses moisture and becomes hard and compacted. If the device described in Patent Document 1 is used on hard soil and sand, a large load is placed on the blades and impeller when excavating the soil and sand. In order to cope with this load, there is a problem that the entire device becomes large. In addition, a large driving force is required to rotate the impeller, which is also a factor in the device becoming large.

[0005] The present invention has been made in consideration of the above-mentioned problems, and has an object to provide a work machine capable of excavating soil and sand in a trench while preventing the machine from becoming too large. [Means for solving the problem]

[0006] The present invention relates to A rotating shaft rotatably disposed in an auger case that is open at the front and bottom; an auger that is disposed on the rotating shaft and rotates integrally with the rotating shaft to scrape off objects and throw the objects; The auger includes a side scraping portion inclined from an end portion of the rotating shaft toward a middle portion of the rotating shaft, The side scraping portion and the rotating shaft have a space through which an object can pass. A working machine characterized by: relates to.

[0007] The present invention further comprises: Any object that is moved excessively by the side scraping portion escapes from the space toward the end side of the rotating shaft. A working machine characterized by: relates to.

[0008] The present invention further comprises: If the object moved by the side scraping portion is excessive, it is possible to let the object escape from the space to the rear in the rotation direction of the side scraping portion. A working machine characterized by: relates to.

[0009] The present invention further comprises: The side scraping portion is provided on the end side of the rotating shaft and includes a sharpened portion that is sharpened toward the front in the rotation direction and toward the radial direction relative to the rotation radius, A central scraping portion is provided in the middle of the rotating shaft, is formed continuously from the side scraping portion, and has a flat surface facing in a direction perpendicular to the axial direction of the rotating shaft; The width of the space from the center side of the rotating shaft to the radial tip gradually decreases from the sharp tip to the central scraping part. A working machine characterized by: relates to.

[0010] The present invention further comprises: The working height of the side scraping portion in the radial direction from the center side of the rotation shaft gradually increases from the sharp tip portion toward the central scraping portion. A working machine characterized by: relates to. Effect of the Invention

[0011] The present invention provides a work machine capable of excavating soil and sand in a trench while preventing the machine from becoming too large. [Brief description of the drawings]

[0012] [Figure 1] 1 is a plan view of a working machine according to an embodiment of the present invention. [Diagram 2] 1 is a side view of a working machine according to an embodiment of the present invention. [Diagram 3] 1 is a front view of a working machine according to an embodiment of the present invention. [Figure 4] 1 is a side cross-sectional view of a working machine according to an embodiment of the present invention. [Diagram 5] 1 is an enlarged side view of a main portion of a working machine according to an embodiment of the present invention. [Figure 6] FIG. 2 is a plan view of the working machine according to the embodiment of the present invention, in which the auger case of the auger section is cut away. [Figure 7] FIG. 2 is an explanatory diagram of a working machine according to an embodiment of the present invention, showing a mechanism for generating scraper rocking vibration. [Figure 8] FIG. 2 is an enlarged side view of a main part of the working machine according to the embodiment of the present invention, showing the trajectory of the swing (vibration) of the tip of the scraper. [Figure 9] 1 is an explanatory diagram of a working machine according to an embodiment of the present invention, showing a state in which the working machine is rotated about a first shaft to a third shaft, and a detachable portion is not shown. [Figure 10]1 is an explanatory diagram of a working machine according to an embodiment of the present invention, showing a state in which the working machine is rotated about a first shaft to a third shaft, and a detachable portion is not shown. [Figure 11] 1 is an explanatory diagram of a working machine according to an embodiment of the present invention, showing a state in which the working machine is rotated about a first shaft to a third shaft, and a detachable portion is not shown. [Figure 12] FIG. 1 is a plan view of a working machine according to an embodiment of the present invention, showing the side attached to a boom device attached to a traveling body. [Figure 13] FIG. 1 is a side view of a working machine according to an embodiment of the present invention, showing an example in which the working machine is mounted on a boom device mounted on a traveling body, as viewed from the left in the traveling direction. [Figure 14] FIG. 2 is a rear view of the working machine according to the embodiment of the present invention, showing an example in which the working machine is mounted on a boom device which is mounted on a traveling body, as viewed from the rear in the direction of travel. [Figure 15] FIG. 2 is a plan view of a working machine according to an embodiment of the present invention, showing an example in which the working machine is mounted on a boom device attached to a traveling body, and shows a case in which the traveling body moves away from the groove and travels parallel to the direction of the groove. [Figure 16] FIG. 1 is a plan view of a working machine according to an embodiment of the present invention, in which the working machine is mounted on a boom device attached to a traveling body, and shows a case in which there is an angular difference in the left-right direction between the direction of the groove and the traveling direction of the traveling body. [Figure 17] FIG. 1 is a side view of a working machine according to an embodiment of the present invention, showing an example of the working machine being mounted on a boom device attached to a traveling body, and showing a case where the orientation of the groove in the vertical direction is different from the orientation of the traveling body. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] A working machine according to an embodiment of the present invention will now be described with reference to the drawings. A is a traveling machine body. In this embodiment, the traveling machine body A is a tractor. A boom device B is attached to the traveling machine body A as shown in Figs.

[0014] C is a ditch or a ditch part. The ditch C is a laid ditch or the like. C1 is the bottom of the ditch, and C2 is the side of the ditch. W denotes waste material, which is an object W such as sand or mud discharged by a work machine from a ditch C as shown in Fig. 14. In the ditch C, the waste material W made of sand or mud accumulates. D is a work machine. The work machine D is a work device that is installed in a ditch C such as a street gutter and removes waste W consisting of sand and mud accumulated in the ditch C.

[0015] The working machine D has a detachable part 1, a second member 2, and a working part 3. The detachable part 1 is formed in the shape of a gutter with a U-shaped cross section that is open at the top, as shown in Figures 1 and 2. In the embodiment, the gutter is oriented in the left-right direction that intersects with the direction of travel. The detachable part 1 that enables the work implement D to be attached and detached to the tip of the boom device B is provided on the work implement D. The tip of the boom device B is fitted into the detachable part 1, as shown in Figures 12 to 17, to fix the boom device B and the work implement D. Therefore, the boom device B can selectively attach and detach a work machine D having a configuration different from that of the work machine D of the present application.

[0016] Reference numeral 11 denotes a first shaft. The first shaft 11 is provided on a first member 15 constituting the work machine D, facing the width direction, which is the horizontal direction to the left and right with respect to the direction of travel, below the attachment / detachment unit 1 provided on the work machine D. The first shaft 11 is fixed to the attachment / detachment unit 1 via a first shaft holding portion 12 provided at the bottom of the attachment / detachment unit 1.

[0017] The first member 15 has one end connected to the first shaft 11, and the front end side of the first member 15 is vertically rotatable relative to the first shaft 11 and is vertically rotatable. The first member 15 includes a first restricting portion 13 that restricts the turning range of the first member 15 and a second restricting portion 14 that restricts the turning range of the second member 2 relative to the first member 15.

[0018] The first shaft 11 is provided with a first restricting portion 13 at the front and rear portions thereof. The first restricting portion 13 is composed of a lower rotation restricting portion 131 and an upper rotation braking portion 132. The downward rotation restricting portion 131 is located on the forward side of the first shaft 11, and when the rear end side of the first member 15 rotates downward around the first shaft 11, it abuts against the underside of the detachable portion 1, thereby restricting the rotation of the first member 15. 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 abutting against the rear surface of the detachable portion 1 when the rear end side of the first member 15 rotates upward around the first shaft 11. The first restricting portion 13 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 detachable portion 1.

[0019] Reference numeral 21 denotes a second shaft. Reference numeral 2 denotes a second member. The second member 2 is made of a long, rectangular body that is long in the forward and backward directions in the traveling direction as a whole, as shown in Figs. 1, 2, 4, and 5. The second shaft 21 is located at the other end portion, which is the rear end side, of the first member 15, and is provided in the up-down direction (vertical direction) intersecting with the first shaft 11, to connect the first member 15 and the second member 2 together.

[0020] The second member 2 is a long member having one end attached to the second shaft 21 and extending rearward from the second shaft 21. The second member 2 is rotatably connected to the second shaft 21, and is rotatable in the left-right direction, which is a direction intersecting with the first member 15, about the second shaft 21 as a rotation axis. The second shaft 21 is capable of moving up and down with the first shaft 11 as a fulcrum.

[0021] The second restricting portions 14 are provided on both the left and right sides near the second axis 21 of the first member 15. The second restricting portions 14 restrict the rotation range of the second member 2. The second restricting portions 14 prevent the second member 2 from rotating without restraint. The rotation range of the second member 2 can be set to any range by adjusting the distance between the second restricting portions 14 and the second member 2.

[0022] Reference numeral 22 denotes a third shaft. The third shaft 22 is provided away from the second shaft 21. The third shaft 22 is disposed parallel to the second shaft 21, and an end portion of the second member 2 that is different from the end portion attached to the second shaft 21 is attached to the third shaft 22.

[0023] Reference numeral 23 denotes a third restricting portion. The third restricting portion 23 is provided on both the left and right sides of the third shaft 22 in the vicinity of the third shaft 22. The third restricting portion 23 restricts the rotation range of the second member 2 relative to the working unit 3, or the rotation range of the working unit 3 relative to the second member 2. The third restricting portion 23 prevents the second member 2 and the working unit 3 from rotating without any restraint relative to each other. The rotation range of the working unit 3 relative to the second member 2 can be set to any range by adjusting the distance between the third restricting portion 23 and the second member 2.

[0024] The working unit 3 is located rearward of the first shaft 11 in the traveling direction and below the first shaft 11. The working unit 3 is located rearward of the second shaft 21 in the traveling direction. The working unit 3 is disposed below the rear end portion of the second member 2 . A third shaft 22 that connects the rear end of the second member 2 is disposed on the upper portion of the working unit 3, and the working unit 3 is rotatable in the left-right direction relative to the second member 2 about the third shaft 22 as a rotation axis. The working unit 3 includes a third restricting portion 23 that restricts the rotation range of the working unit 3 relative to the second member 2. The working portion 3 is disposed in the groove portion C as shown in FIGS. The working unit 3 is located behind the detachable unit 1 and is pulled by the detachable unit 1 via the first member 15 and the second member 2.

[0025] Since the working unit 3 is vertically rotatable about the first shaft 11, the attachment / detachment unit 1 and the working unit 3 can be disposed with a relative inclination. This is a side view of the working machine of the embodiment shown in Figure 17, which shows an example of the working machine being attached to a boom device attached to a traveling body, and illustrates a case where the orientation of the groove in the vertical direction is different from the orientation of the traveling body. During work, even if the slope of the side gutter and the road surface on which the traveling body runs are inclined relatively to each other in the up-down direction along the traveling direction, the working unit 3 can be aligned with the slope of the side gutter on one side as shown in Figure 17. Therefore, even if there is a difference in the slope between the two, work can be done without worrying about the angle of the forward and backward slope of the working unit 3. As can be seen by comparing Figures 17 and 13, at point E, the underside of the detachable part 1 abuts against the downward rotation regulating part 131 of the first regulating part 13, and by abutting against the underside of the detachable part 1, the rotation of the first member 15 is restricted. l4 is the running surface of the running body A.

[0026] The working unit 3 placed in the groove C is pulled by the leading detachable part 1, and can therefore move along the wall surface of the groove C without using a special drive device. When moving along the groove side part C2, which is the wall surface of the groove C, a rod-shaped guide member 66 (or a curved part 67 of the guide member 66) provided on the side of the working unit 3 abuts against the groove side part C2, thereby preventing the main body of the working unit 3 from being damaged.

[0027] The working unit 3 is rotatable about two axes, a second axis 21 and a third axis 22, relative to the detachable unit 1. Even if the gutter and the traveling machine body, which are arranged in parallel with each other, move relatively closer or farther away from each other, the second member 2, which rotates about the second axis 21 and the third axis 22, can absorb the difference in distance. Since the detachable part 1 and the working part 3 can move in parallel while maintaining a parallel angle to each other without creating an angle with respect to the traveling direction, the worker does not need to frequently steer the traveling machine body, making operation easier.

[0028] As shown in Figure 12, which is a plan view of the side attached to the boom device B attached to the traveling body A, Figure 13, which is an example of attachment to the boom device B attached to the traveling body A seen from the left in the direction of travel, and Figure 14, which is an example of attachment to the boom device B attached to the traveling body A seen from behind in the direction of travel, work is not limited to situations where there is no relative angular difference between the traveling body 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 a relative angular difference occurs between the groove C and the traveling direction of the running body in the left-right direction with respect to the traveling direction, either one of the second member 2 and the working unit 3 arranged on the second axis 21 and the third axis 22 rotates more than the other, or the second member 2 and the working unit 3 rotate in the same direction in a planar view, so that the working unit 3 can generate an angular difference relative to the left and right of the traveling direction with respect to the attachment.

[0029] 9, 10, and 11 are explanatory diagrams of the working machine according to the embodiment, showing the state of rotation on the first to third axes. l2 is the orientation of the working unit 3. l3 is the orientation of the traveling body A or the detachable unit 1. In either case, the detachable unit 1 and the working unit 3 can rotate relatively left and right to perform work. This is a plan view showing an example of mounting to a boom device mounted on a traveling body, and even in the case shown in Fig. 15 where the traveling body is separated from the groove and travels parallel to the direction of the groove, work is possible. By moving in the left-right direction relative to the attachment / detachment part 1, the working unit 3 can absorb any difference in the relative left-right distance between the parallel groove C and the traveling body A.

[0030] This is a plan view of a working machine, and is an example of a machine mounted on a boom device attached to a traveling body, which shows a case where there is an angular difference in the left-right direction between the direction of the groove and the direction of travel of the traveling body.Even in the case shown in Figure 16, the difference in the left-right angle between the groove C and the traveling body A can be absorbed. That is, even if there is an angular difference between the left and right directions of the traveling direction of the traveling body A and the left and right directions of the groove direction of the gutter C, which are not parallel to each other, the difference in the left and right angles between the groove C and the traveling body A can be absorbed by the relative left and right rotation of the attachment / detachment unit 1 and the working unit 3. Therefore, the worker does not have to frequently operate the operating devices to steer the traveling body A, making operation easier.

[0031] Since the rotation angles of the first member 15, the second member 2, and the working unit 3 are restricted by the first restricting unit 13, the second restricting unit 14, and the third restricting unit 23, it is possible to limit the positional relationship of the working unit 3 with respect to the attachment / detachment unit 1. In other words, even if the working unit 3 is positioned outside the groove C, the working unit 3 can be positioned with moderation with respect to the attachment / detachment unit 1, and the working unit 3 can be easily disposed in the groove C using the boom device B.

[0032] This work machine D is placed in a ditch C such as an installed roadside gutter C, and performs work to remove and discharge accumulated earth, sand, mud, etc. from the ditch C. In this embodiment, the work machine D is provided at the tip of a 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 body 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 hinder the rotation of the first member 15, the second member 2 and the working part 3.

[0033] The configuration of working unit 3 will now be described. Reference numeral 4 denotes an auger case constituting the working unit 3. As shown in Fig. 3 and Fig. 4, the auger case 4 is box-shaped with an open front and bottom, and is provided in the working unit 3 disposed in the groove portion C. An auger 44 is installed inside the auger case 4.

[0034] 2 and 4, the rear surface of the auger case 4 is curved in an arc shape along the outer periphery of rotation of the auger 44. This curved surface is disposed close to the outer periphery of rotation of the auger 44. Therefore, the object W that moves rearward and further upward by the auger 44 can be prevented from leaking out in the radial direction.

[0035] The bottom of the auger case 4 is open, and the lower end of the curved surface at the rear of the auger case 4 faces downward and forward. The lower end of the curved surface is located at a position roughly the same as or slightly higher than the lower end of the outer periphery of rotation of the auger 44. As the lower end moves forward, it moves relative to the groove bottom C1, thereby scooping up objects W that have not been moved by the auger 44 and remain at the groove bottom C1. The objects W placed on the curved surface at the rear of the auger case 4 are then moved upward by the auger 44 (central scraping part 442). The auger case 4 has side plates 43 that are capable of supporting the rotating shaft 41 and cover the left and right sides of the auger 44 .

[0036] A rotating shaft 41 is disposed in the auger case 4 in a horizontal direction and is driven to rotate. 1 and 2, the rotating shaft 41 of the embodiment transmits the rotational power of a motor 51 provided behind the auger case 4, outside the auger case 4, to a pulley 52 fixed integrally with the rotating shaft 41 provided on the side of the auger case 4, via a transmission member such as a belt 53 or a chain. The motor 51 may be either electric or hydraulic.

[0037] The auger 44 includes a support arm 45 that is fixed integrally with the rotating shaft 41. The support arm 45 is fixed to the rotating shaft 41 in a rotating manner. The bearing 42 supports the rotating shaft 41 in the auger case 4. The bearing 42 is positioned inside the auger case side plate 43, preventing the bearing 42 from protruding outward from the auger case 4. The long plate-like support arm 45 that connects and fixes the rotating shaft 41 and the side scraping part 441 of the auger 44 has one end fixed at a joint 444 provided in the middle of the side scraping part 441, and the other end fixed near the bearing 42. Therefore, the support arm 45 reduces the moment load applied to the rotating shaft 41 by directly receiving the load applied in a direction perpendicular to the rotating shaft 41 received by the side scraping part 441 at the bearing 42, thereby making it possible to prevent the rotating shaft 41 from being damaged.

[0038] The auger 44 is disposed on the rotating shaft 41 and rotates integrally with the rotating shaft 41 to scrape off the object W and throw the object W. As shown in Figures 6, 7, etc., the auger 44 includes a central scraping portion 442 and side scraping portions 441 located on both sides of the central scraping portion 442. The side scraping portions 441 and the central scraping portion 442 are formed continuously and are fixed to the rotating shaft 41 by support arms 45. The central scraping portion 442 is provided in the middle of the rotating shaft 41 of the auger 44, and is formed continuously from the side scraping portions 441 and has a flat portion 442a whose surface is oriented in a direction perpendicular to the axial direction of the rotating shaft 41.

[0039] The side scraping portions 441 provided on the auger 44 at the left and right sides of the central scraping portion 442 are formed symmetrically with respect to the central scraping portion 442. In the embodiment, the auger 44 is configured with the central scraping portion 442 and the side scraping portions 441 provided at two positions at equal intervals around the rotation shaft 41 when viewed from the axial direction, but the number of these portions is not limited. The auger 44 rotates around the rotation shaft 41, which is a horizontal axis oriented in the left-right direction relative to the traveling direction, to scrape off objects W such as accumulated soil and sand present in front of the auger 44 and throw it upward. In this embodiment, the rotation direction of the auger 44 is such that, as viewed from the axial direction of the rotation shaft 41, the upper side of the rotating radial tip of the auger 44 rotates forward and the lower side rotates backward. In other words, down cutting is performed.

[0040] The central scraping portion 442 provided on the auger 44 will be further described. The central scraping portion 442 has a flat portion 442a formed in a flat plate shape. The width of the plane portion 442a of the central scraping portion 442, which faces in a direction perpendicular to the axial direction of the rotating shaft 41, in the direction parallel to the axial direction of the rotating shaft 41 increases as it approaches the radial direction relative to the radial direction of the rotating shaft 41. The plane portion 442a is formed continuously from the side scraping portion 441 through the middle portion 442b. The middle portion 442b is a shape in which one or more triangular planes with apexes facing the radial direction are continuously connected as shown in Figures 3 and 4, or a curved shape (not shown) in which the radius of curvature becomes smaller as it approaches the radial direction from the rotating shaft 41, thereby connecting the side scraping portion 441 and the plane portion 442a. Therefore, the plane portion 442a is formed in a triangular shape with the apex on the rotating shaft 41 side, or in a trapezoidal shape with the short side on the rotating shaft 41 side.

[0041] 2, the flat surface 442a is formed so that the surface becomes wider in the radial direction relative to the rotation radius when viewed from the front in the rotation direction of the auger 44. When the object W is thrown in the radial direction by centrifugal force, the object W moving along the flat surface 442a can move smoothly in the radial direction. On the other hand, when the central scraping portion 442 scrapes off an object W in front of the auger 44, the flat portion 442a that widens in the radial direction ensures a width that allows the central scraping portion 442 to scrape off the object W.

[0042] The width of the flat surface 442a is preferably 1.5 to 2 times wider in the direction of the radius of rotation, based on the width on the rotating shaft 41 side. In the example, 1.8 times is adopted. The smaller the contact area of ​​the object W, the less friction there is, and the easier it is to move on the flat surface 442a. Since the width of the flat surface 442a in the direction of the rotating shaft becomes larger in the direction of the radial direction, the object W on the flat surface 442a can be prevented from coming into contact with the lateral middle portion 442b or the side scraping portion 441 when moving in the radial direction by centrifugal force, and the increase in friction can be prevented. Therefore, the object W located on the flat surface 442a of the central scraping portion 442 can be moved to the outer end of the flat surface 442a in the radial direction by centrifugal force without generating unnecessary friction. Then, the object W that reaches the outer end of the flat surface 442a leaves the flat surface 442a and is thrown toward the chute 71 side. The outer periphery of the rotational area of ​​the auger 44, that is, the outer periphery of the radially outer ends of the side scraping parts 441 and the central scraping part 442, is formed without any unevenness over the entire area. This reduces the risk of damaging the structure of the side gutter C, which is a pre-formed gutter C, and makes it possible to neatly scrape off the object W from the gutter bottom C1.

[0043] The side scraping portion 441 provided on the auger 44 will be further described. As shown in FIG. 2, the auger 44 is arranged to move from the end of the rotating shaft 41 toward the middle of the rotating shaft 41. Accordingly, a side scraping portion 441 is provided which is inclined. 2, 3, 4, 6, 7, etc., the side scraping unit 441 is disposed at an angle such that the surface is inclined inward with respect to the axial direction of the rotating shaft 41 when viewed from a direction perpendicular to the rotating shaft 41 (for example, from the front). The side scraping unit 441 can scrape off and move toward the center the soil at the ends of the working width, which is the width workable by the auger 44 and the left-right width in the traveling direction.

[0044] 4, the entire radial tip of the side scraping portion 441 is formed to pass through the region of the tip in the radial direction of rotation of the auger 44. That is, the side scraping portion 441 is formed in an arc shape in a side view. Therefore, during rotation, the side scraping portion 441 minimizes the gap with the bottom surface of the groove C located below the side scraping portion 441, and efficiently moves the object W to the center of the auger 44, and the side scraping portion 441 continuously moves the object W to the center of the auger 44 as it rotates.

[0045] The side scraping portion 441 provided on the auger 44 is provided with a sharpened portion 443 at the end side of the rotating shaft 41 and forward in the rotation direction. The sharpened portion 443 is located closer to the end side of the rotating shaft 41 in the axial direction than the support arm 45. The sharpened tip 443 protrudes forward in the rotation direction from the support arm 45 that fixes the side scraping portion 441 to the rotation shaft 41. The sharpened tip 443 becomes sharper in the radial direction relative to the rotation radius.

[0046] 4, in a side view, the width of the sharpened portion 443 provided on the side scraping portion 441 is set to be smaller than the width of the side scraping portion 441 on the side of the central scraping portion 442. Therefore, the object W located directly below the sharpened portion 443 is easily pierced by the sharpened portion 443 due to rotation, and the object W moving relatively to the auger 44 side so as to be connected by the progress can be separated. When viewed from a direction perpendicular to the axial direction of the rotating shaft 41, the sharpened portion 443 is disposed closer to the side plate 43 of the auger case 4 than the joint 444 with the support arm 45, and in the vicinity of the side plate 43. This prevents the support arm 45 from coming into contact with the auger case 4, and ensures that the working width of the auger 44 is maximized within the auger case 4.

[0047] In addition to ensuring the working width of the auger 44 and preventing damage to the rotating shaft 41, the rotating area of ​​the sharpened portion 443 is arranged to move on the radially outer periphery of the bearing 42, so that objects W do not directly reach the bearing 42. Also, because the tip of the sharpened portion 443 rotates in close proximity to the auger case side plate 43, even if objects W such as soil and sand adhere to the side plate 43, they are scraped off by the sharpened portion 443, and the inside of the auger case 4 can be kept clean. The auger case 4 supports the rotating shaft 41 by the bearing portion 42, and the sharp tip portion 443 moves radially around the outer periphery of the bearing portion 42 as it rotates, allowing the auger 44 to perform work continuously and under appropriate conditions.

[0048] 4, a space S through which the object W can pass is provided in each of the side scraping part 441 and the rotating shaft 41. When the amount of the object W moved by the side scraping part 441 becomes excessive, the object W can escape from this space S to the end side of the rotating shaft 41. Therefore, the rotational drive force required for scraping off the object W by the auger 44 does not need to be set excessively, which prevents the entire device from becoming bulky.

[0049] As shown in FIG. 4, the width of the space S from the center of the rotation shaft 41 to the radial tip of the space S in a side view is formed to gradually decrease from the sharp tip portion 443 toward the central scraping portion 442. That is, in a side view, the working height in the radial direction from the center of the rotating shaft 41 of the side scraping part 441 to the radial tip gradually increases from the sharp tip 443 toward the central scraping part 442. By forming it in this way, the object W which is gradually scraped from the end side of the rotating shaft 41 and increases in volume can be moved to the central scraping part 442 side without being missed by the side scraping part 441 which is gradually pushed and the working height of which increases.

[0050] On the other hand, if the volume of the object W moved by the side scraping portion 441 increases excessively, the object W is moved out of the space S backward in the rotation direction of the side scraping portion 441 to prevent excessive rotational load from being applied to the rotating shaft 41. Since the space S on the side of the central scraping portion 442 of the side scraping portion 441 is small, the amount of leakage from the side space S can be suppressed when the central scraping portion 442 throws the object W. The ratio of the width from the center of the rotation axis toward the outside in the radial direction in a side view of the space S to the side scraping portion 441 is preferably set to 1 to 1.5 for the width of the space S, and gradually change from the sharp tip portion 443 toward the central scraping portion 442 side to 0.2 to 0.5 and the working height of the side scraping portion 441 to about 1.5 to 1.8, when the working height of the side scraping portion 441 on the tip side of the sharp tip portion 443 is 1.

[0051] The central scraping portion 442, which is formed continuously from the side scraping portions 441, scrapes off objects W in the center of the working width of the auger 44, and throws the objects W collected by the side scraping portions 441 and the central scraping portion 442 upward. The objects W thrown by the central scraping portion 442 are guided by a chute 71 located at the top of the auger 44, slightly rearward of the center in the width direction of the auger case 4, and thrown outside the groove C.

[0052] The joint 444 between the side scraping part 441 and the support arm 45 is located on the rear side of the side scraping part 441 in the rotation direction, and therefore does not impede the movement of the object W on the front side of the side scraping part 441 in the rotation direction.

[0053] The function of the auger 44 will now be described. When the object W reaches the rotation area of ​​the auger 44 and the sharp tip 443, it is pierced by the sharp tip 443. The object W is then moved directly to the central scraping part 442 by the side scraping part 441, or is slammed into the groove bottom C1 directly below the rotation area by the centrifugal force of the rotating sharp tip 443. The object W slammed against the groove bottom C1 crumbles due to the impact and becomes loose. Thereafter, the side scraping parts 441 move the object W again across the groove bottom C1 in the width direction relative to the traveling direction, and it reaches the central scraping part 442. Having reached the flat part 442a of the central scraping part 442, the object W is moved relatively backward by the central scraping part 442 and reaches the curved surface at the rear of the auger case 4. The object W is then lifted by the flat part 442a of the central scraping part 442 and moves upward along the curved surface, and is thrown upward via the chute 71.

[0054] When the object W reaches the rotation area of ​​the auger 44 and the central scraping part 442, the object W is relatively moved backward and thrown upward by the central scraping part 442. Or, even if the object W is slammed into the groove bottom part C1 directly below the rotation area by the central scraping part 442, the object W is easily scraped by the rotating central scraping part 442 because it is broken up by the impact. Then, the object W is moved backward by the flat part 442a of the central scraping part 442 and reaches the curved surface of the rear surface of the auger case 4. Then, the object W is lifted by the flat part 442a of the central scraping part 442 along the curved surface, moves upward, and is thrown upward.

[0055] A scraper 61 is a plate-shaped member that is provided at the lower part of the auger case 4 so as to span the auger case 4 in the width direction. 4, 6 and other figures, the scraper 61 is provided in front of the auger 44 and inclined so that the rear side is higher than the front side. The scraper 61 has a working width larger than the working width of the auger 44. The rear end side of the scraper 61 is disposed near the outside of the rotation area of ​​the auger 44, and the rear end side is provided so as to overlap the rotation area of ​​the auger 44 in a plan view as shown in Figure 6.

[0056] A scraper front end 65, which is the front end of the scraper 61, is positioned slightly above the lower end of the rotation area of ​​the auger 44 or at the same height as the lower end of the rotation area of ​​the auger 44 in a side view in the direction of the rotation shaft 41 of the auger 44. This prevents the scraper front end 65 protruding downward and forward from getting caught on a small step that exists in the groove C during forward movement, preventing the working unit D from being able to move forward. In other words, although it is the auger 44 that is the lowest end of the working unit 3 and comes into contact with the groove bottom C1, the outer periphery of the rotating auger 44 is smooth and circular in side view, so that even if there is a step, it can overcome it.

[0057] 1, 2, and 6 denotes an inclined plate portion. In a plan view, the inclined plate portion 54 is provided at the front portion of the auger case side plate 43, and is inclined toward the outside in the width direction relative to the traveling direction as it moves forward. An inclined plate front end portion 55, which is the front end portion of the inclined plate portion, is positioned outward in the width direction relative to the traveling direction from the end portion of the rotating shaft 41 and the side end portion of the scraper 61. In a side view, the inclined plate front end 55 of the inclined plate portion 54 is inclined backward in the traveling direction from top to bottom. The upper part of the inclined plate front end 55 is disposed so as to protrude forward from the scraper front end 65 of the scraper 61. The inclined plate front end 55 of the inclined plate portion 54 configured as described above can come into contact with the groove side portion C2 of the groove C, and can peel off objects attached to the groove side portion C2 as the working machine D advances. A scraper 61 is disposed on the lower end side of the inclined plate portion 54, in front of the rotation area of ​​the auger 44. The scraper 61 can scoop up the object W on the groove bottom surface C1, and at the same time, receive the object W peeled off from the groove side portion C2 by the inclined plate portion 54. The object W on the scraper 61 moves rearward as the machine advances, and then is moved further rearward by the auger 44 and thrown.

[0058] The inclined plate portion 54 of the present invention collects objects W, which are sediments such as soil and sand located on the outer lateral side of the working width of the auger 44, to the auger 44 having a working width narrower than the width of the ditch C. In addition, the inclined plate portion 54 peels off objects W adhering to the ditch side portion C2, which is the wall surface of the ditch C, and allows the auger 44 to collect and throw the objects W. The inclined plate portion 54 is located forward of the rotation area of ​​the auger 44 in a side view, and is provided in front of the side plate 43 of the auger case 4. The height of the inclined plate portion 54 is set to be approximately the same as the height of the rotation area of ​​the auger 44. The object W on the groove side portion C2 can be peeled off in advance before the advancing auger 44 arrives.

[0059] The inclined plate front end 55 of the inclined plate portion 54 is disposed outward in the traveling direction from the end of the bearing portion 42 that supports the rotation shaft 41 of the auger 44. The inclined plate front end 55 protrudes furthest outward in the width direction of the working machine D. Therefore, the inclined plate front end 55 can collect objects W on the groove side portion C2 that are outside the working width of the auger 44 and cannot be reached by the auger 44. In a side view, the inclined plate front end 55 is inclined backward in the traveling direction as it goes from above to below, so that the tip in contact with the groove side C2 can gradually peel off the object W from above as it moves forward. This reduces the resistance when scraping off the object W from the groove side C2, and the inclined plate front end 55 does not deviate from the groove side C2 due to the resistance. In other words, no part is left unpeeled, and the object W does not adhere to the groove side C2 after it has been peeled off, resulting in a clean finish to the groove side C2. The front end 55 of the inclined plate in the front view is inclined inward relative to the width in the traveling direction as it goes from top to bottom. The cross section of the existing groove C is formed so as to gradually narrow as it goes downward, so by adjusting to this, objects W on the groove side part C2 can be swept away efficiently and cleanly.

[0060] A guide member 66 is provided below the working unit 3 and on the outside of the side plate 43. The guide member 66 is made of an elongated member that is elongated in the front-rear direction. In this embodiment, the guide member 66 is made of a round bar. The guide member 66 is located at the lower end of the inclined plate portion 54, and is positioned so as to pass at the same position as the lower end of the inclined plate portion 54 or slightly outside it. The guide member 66 can pass through the same position as the lower end of the front end portion 55 of the inclined plate or slightly outside the lower end portion of the front end portion 55 of the inclined plate by advancing forward. The guide member 66 is an elongated member extending in the front-to-rear direction, and as the elongated direction comes into contact with the groove side portion C2 which is the wall surface, the auger case 4 can be positioned in an appropriate state aligned with the direction of the groove C. When the working unit 3 is positioned in the groove C along the traveling direction, the guide member 66 comes into contact with the groove side portion C2 of the groove C and can guide the working unit 3 along the groove C. Therefore, the auger case 4 including the inclined plate portion 54 can perform work in the groove C appropriately. Cut.

[0061] 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 unevenness in the groove side portion C2, which is the wall portion within 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 a groove C having an inclined wall surface is in a groove C with a width narrower than the left-right width of the guide members 66 located on the left and right sides of the auger case 4, it rises along the inclination of the groove side portion C2, and the working machine D is prevented from being damaged by being wedged in the narrow groove C.

[0062] Reference numeral 67 denotes 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 traveling direction, it curves inward relative to the width in the traveling direction from the front end portion 55 of the inclined plate, and is provided at a position where the front end of the curved portion 67 protrudes forward from the front end portion 65 of the scraper and the front end portion 55 of the inclined plate. The tip of the guide member 66 has a curved portion 67 that is curved inward. Even if there are irregularities in the wall surface portion of the groove C that the guide member 66 comes into contact with, the auger case 4 can be guided without getting caught. Even if the width of the groove C narrows, the curved portion 67 detects this in advance, making it possible to lift the work machine D along the groove side portion C2, which is the wall surface of the groove C.

[0063] The scraper 61 will now be described in further detail. The scraper 61 is provided with a width wider than the working width of the auger 44, so that the objects W supplied to the auger 44 can be reliably peeled off from the groove bottom C1. The lifted objects W can then be scraped rearward and moved by the auger 44. In other words, the objects W in an aggregated state do not enter the rotation area of ​​the auger 44 while remaining stuck to the groove bottom C1, so that excessive load on the auger 44 can be prevented.

[0064] The scraper 61 of this embodiment of the present invention is located in front of the auger 44, and can peel off hard-packed soil and sand W from the bottom C1 of the groove C in advance as it advances. Without the scraper 61, the auger 44 itself, which is a rotating body, would scrape off the object W that is stuck to the groove bottom C1 and is in a tightly packed state. In this case, the auger 44 has both the function of peeling off the stuck object W from the groove bottom C1 and the function of crushing the hard object W and moving it backward while moving it toward the center. For this reason, the load required for rotation of the auger 44 becomes large, and a large amount of energy is required to drive it.

[0065] The rear end of the scraper 61 is inclined forward and backward so as to be raised relative to the scraper front end 65. Furthermore, this rear end is provided at a position overlapping the rotation area of ​​the auger 44 in a plan view. This allows the object W that has been raised from the groove bottom C1 by the scraper 61 and reached the auger 44 to be moved rearward by the auger 44.

[0066] Since the scraper front end 65 of the scraper 61 preliminarily peels the object W from the bottom of the groove C as it advances, the auger 44 does not need to peel the object W from the groove bottom surface C1. Since the rear end of the scraper 61 is located immediately before the rotation area of ​​the auger 44, the peeled object W pushed out toward the rear end side of the scraper 61 as the machine body moves forward can easily reach the auger 44.

[0067] Furthermore, the scraper 61 includes a vibration mechanism for promoting the separation of the object W from the groove bottom surface C1. The vibration mechanism of the scraper 61 and the action of the scraper will be described. The scraper 61 is provided so as to be capable of vibrating in the front-rear or up-down direction. Rods 62 are attached to both the left and right ends of the scraper 61 so as to extend rearward. Reference numeral 63 denotes a support shaft, which is a support portion. 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 surface of the support shaft 63, through which the rod 62 passes and which can slidably hold the rod 62. The support shaft 63 in this embodiment is a round bar, and its axial direction faces the left and right directions relative to the direction of travel. A through hole is provided in a direction that intersects with the axial direction of the round bar. The support shaft 63 is provided in the auger case 4 and is parallel to the rotary shaft 41. The rod 62 fixed to both the left and right ends of the support 1 is supported.

[0068] A camshaft 64 is disposed at the end of the rotary shaft 41, rotates integrally with the rotary shaft 41, and performs eccentric motion. The rod 62 connects the scraper 61 and the cam shaft 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 cam shaft 64 via this bearing 62a.

[0069] 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 provided to be rotatable about an axis in the left-right direction with respect to the side plate 43. Furthermore, the rod 62 is allowed to slide freely 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 axial end of the rotating shaft 41 is a cam shaft 64 fixed integrally to the rotating shaft 41, and the rear end of the rod 62 is connected to the cam shaft 64 via a bearing 62a.

[0070] When the rotating shaft 41 of the auger 44 rotates, the cam shaft 64 also rotates therewith, performing eccentric motion. The rod 62 subjected to this eccentric motion slides on the support part 63, and the front side thereof swings up and down with the support part 63 as a fulcrum. Therefore, the scraper 61 swings and vibrates in the front-rear direction in conjunction with the movement of the rod 62, and the scraper front end part 65 of the scraper 61 swings and vibrates up and down, as shown by the solid and dashed lines in Figure 8. l1 is the swing path of the tip of the scraper 61. The scraper 61 positioned between the object W and the groove bottom C1 can enter between the object W and the groove bottom C1 by vibrating back and forth, scraping the object W from the groove bottom C1, and peeling it off from the groove bottom. Furthermore, the scraper 61 has a front end 65 that vibrates up and down, making 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 up and down between the state shown by the solid line and the state shown by the two-dot chain line in FIG.

[0071] As the machine advances, the object W moves rearward on the scraper 61, as if being pushed out by the object W in front, and the object W can be loosened by the forward and backward vibrations and up and down vibrations of the scraper 61. That is, the hard soil and its lumps can be loosened and softened by the vibration of the scraper 61. Thereafter, the object W that reaches the auger 44 is accumulated and thrown upward by the side scraping parts 441 and the central scraping part 442. Since the object W has been loosened and softened, the auger 44 can move the object W little by little toward the center and throw it. Since the object W is moved little by little, the load and resistance applied to the rotation of the auger 44 can be reduced, and an increase in the energy required for driving can be suppressed.

[0072] 71 is a chute. 711 is a chute connection port. A cylindrical or U-shaped chute 71 is provided at the top center of the auger case 4, and the top of the auger case 4 is opened through the chute 71. The object W, which moves upward in a state where the radial direction is blocked by the central scraping part 442 of the auger 44 and the curved surface at the rear of the auger case 4, becomes unblocked at the bottom of the chute 71. Then, the object W moves in the radial direction on the flat part 442a of the central scraping part 442 by centrifugal force, passes through the chute connection port 711, and is thrown upward while being guided by the chute 71. In the example, the chute 71 is curved to the right in the traveling direction, 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 curved direction of the chute 71. [Explanation of symbols]

[0073] 1 Detachable part 2 Second member 3 Working section 4 Auger Case 44 Ogre 441 Side scraping part 442 Center scraping section 443 Sharp part 11 1st axis 15 First member 21 2nd axis 22 3rd axis 41 Rotation axis C Groove D Work equipment

Claims

1. A rotating shaft rotatably disposed in an auger case that is open at the front and bottom; an auger that is disposed on the rotating shaft and rotates integrally with the rotating shaft to scrape off objects and throw the objects; The auger includes a side scraping portion inclined from an end portion of the rotating shaft toward a middle portion of the rotating shaft, The side scraping portion and the rotating shaft have a space through which an object can pass. A work machine characterized by:

2. Any object that is moved excessively by the side scraping portion escapes from the space toward the end side of the rotating shaft.

2. The work machine according to claim 1 .

3. If the object moved by the side scraping portion is excessive, it is possible to let the object escape from the space to the rear in the rotation direction of the side scraping portion.

2. The work machine according to claim 1 .

4. The side scraping portion is provided on the end side of the rotating shaft and includes a sharpened portion that is sharpened toward the front in the rotation direction and toward the radial direction relative to the rotation radius, A central scraping portion is provided in the middle of the rotating shaft, is formed continuously from the side scraping portion, and has a flat surface facing in a direction perpendicular to the axial direction of the rotating shaft; The width of the space from the center side of the rotating shaft to the radial tip gradually decreases from the sharp tip to the central scraping part.

4. A work machine according to claim 1 or 3.

5. The working height of the side scraping portion in the radial direction from the center side of the rotation shaft gradually increases from the sharp tip portion toward the central scraping portion.

5. The working machine according to claim 4.

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