Digging 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. More 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 laid side groove, 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 paddle wheel and a chute for discharging soil at the tip of the fourth arm. By configuring 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 traveling direction of the paddle 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 in the groove, the laterally exposed rotatable impeller may contact the wall surface of the groove. Due to the contact of the impeller, the wall surface of the groove may be damaged. Also, consider the case where, instead of the cleaning tool of Patent Document 1, the working part (auger paddle and auger housing) in the form described in Patent Document 2 is applied and arranged in the groove. In this case, since the auger paddle is covered by the auger housing except in the front, it is possible to suppress damage to the wall surface of the groove by the rotating object. On the other hand, compared with the cleaning tool of Patent Document 1, the working width of the auger paddle must be made even smaller than the width of the groove. Then, when scraping the sediment deposited in the groove with the auger paddle, there is a problem that a gap is generated between the working width of the auger paddle and the wall surface, and the sediment remains in the groove.

[0005] The present invention has been made in view of the above problems, and an object thereof is to provide a working machine that can prevent sediment from remaining in the groove while suppressing the exposure of the rotating object and can work properly in the groove.

Means for Solving the Problems

[0006] This invention is an auger that can scrape and throw an object by rotating, and an auger case having side plates that support the auger and cover the side portions of the auger, and a long guide member in the front-rear direction provided outside the width of the side plate in the traveling direction and having a curved portion with a tip curved inward, characterized by comprising and relates to a working machine.

[0007] This invention further wherein the auger case is arranged in a groove portion such as a laid side groove, and the guide member can contact the groove side portion of the groove portion, characterized by a working machine, and relates to.

[0008] This invention further The side plate is provided with an inclined plate portion that is inclined 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 is provided with an inclined plate front end portion that is inclined rearward 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 the above. Relates to.

[0009] This invention further A scraper is provided in front of the auger and is inclined so that the rear side is higher than the front side with respect to the front side. 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 the above. Relates to.

Effects 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 work properly in the groove. To provide.

Brief Description of the Drawings

[0011]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Figure 14

Figure 15

Figure 16

Figure 17

Best Mode for Carrying Out the Invention

[0012] The working machine according to an embodiment of the present invention will be described with reference to the drawings. A is a traveling body. In this embodiment, the traveling body A is a tractor. B is a boom device. As shown in FIGS. 12 to 17, the boom device B is attached to the traveling body A.

[0013] C is a groove or a groove portion. The groove C consists of a laid side groove or the like. C1 is the bottom of the groove, and C2 is the side of the groove. W is an object W such as sand and mud discharged from the groove C to the working machine as shown in FIG. 14. Discharged matter W consisting of sand and mud accumulates in the groove C. D is a working machine. The working machine D is a working device installed in a groove C such as a laid side groove and removing discharged matter W consisting of sand and mud accumulated in the groove C.

[0014] The working machine D has a detachable part 1, a second member 2, and a working part 3. As shown in FIGS. 1 and 2, the detachable part 1 has a U-shaped gutter shape with an open upper part. In the embodiment, the direction of the gutter is in the left-right direction intersecting the traveling direction. The working machine D is provided with a detachable part 1 that can be detachably attached to the tip of the boom device B. As shown in FIGS. 12 to 17, the tip of the boom device B is fitted into the detachable part 1 to fix the boom device B and the working machine D. Therefore, the boom device B can select and attach / detach a working machine D in a form different from the working machine D of the present application.

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

[0016] The first member 15 has one end connected to the first shaft 11, and the front end side of the first member 15 is pivotable up and down with respect to the first shaft 11 and is rotatable up and down. 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 with respect to the first member 15.

[0017] The first restricting portion 13 is provided at the front and rear portions of the first shaft 11. The first restricting portion 13 is composed of a downward rotation restricting portion 131 and an upward rotation restricting portion 132. The downward rotation restricting portion 131 is located on the front side of the first shaft 11. When the rear end side of the first member 15 rotates around the first shaft 11 downward, it abuts against the lower surface 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. When the rear end side of the first member 15 rotates around the first shaft 11 upward, it abuts against the rear surface of the detachable portion 1, thereby restricting the rotation of the first member 15. The first restricting portion 13 provides a rotatable range for the first member 15. The rotatable range of the first member 15 can be set to an arbitrary range by adjusting the distance between the first restricting portion 13 and the detachable portion 1.

[0018] 21 is the second shaft. 2 is the second member. The second member 2 is formed of an elongated body that is long in the front-rear direction of 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, which is the rear end side of the first member 15, and is provided in the vertical direction (perpendicular direction) intersecting the first shaft 11 to connect the first member 15 and the second member 2.

[0019] The second member 2 has one end attached to the second shaft 21 and is an elongated member extending rearward from the second shaft 21. The second member 2 is rotatably connected to the second shaft 21 and is pivotable and rotatable in the left-right direction, which is the direction intersecting the first member 15, with the second shaft 21 as the rotation axis. The second shaft 21 is movable up and down with the first shaft 11 as a fulcrum.

[0020] The second restricting portion 14 is provided on both the left and right sides in the vicinity of the second axis 21 of the first member 15. The second restricting portion 14 restricts the turning range of the second member 2. The second restricting portion 14 prevents the second member 2 from rotating without restraint. The turning range of the second member 2 can be set to an arbitrary range by adjusting the distance between the second restricting portion 14 and the second member 2.

[0021] 22 is the third axis. The third axis 22 is provided at a distance from the second axis 21. The third axis 22 is arranged parallel to the second axis 21 and attaches an end portion different from the attachment end of the second member 2 to the second axis 21.

[0022] 23 is the third restricting portion. The third restricting portion 23 is provided on both the left and right sides of the third axis 22 in the vicinity of the third axis 22. The third restricting portion 23 restricts the turning range of the second member 2 with respect to the working portion 3, or the turning range of the working portion 3 with respect to the second member 2. The third restricting portion 23 prevents the second member 2 and the working portion 3 from rotating without restraint with respect to each other. The turning range of the working portion 3 with respect to the second member 2 can be set to an arbitrary range by adjusting the distance between the third restricting portion 23 and the second member 2.

[0023] The working portion 3 is located behind the first axis 11 in the advancing direction and below the first axis 11. The working portion 3 is located behind the second axis 21 in the advancing direction. The working portion 3 is disposed below the rear end portion of the second member 2. The working portion 3 has a third axis 22 that connects the rear end portion of the second member 2 disposed above the working portion 3. With the third axis 22 as the rotation axis, the working portion 3 is rotatable in the left - right direction relative to the second member 2. The working portion 3 includes a third restricting portion 23 that restricts the turning range of the working portion 3 with respect to the second member 2. The working portion 3 is disposed in the groove portion C as shown in FIGS. 12 to 17. The working portion 3 is located behind the detachable portion 1 and is pulled by the detachable portion 1 via the first member 15 and the second member 2.

[0024] Since the working unit 3 is pivotable up and down about the first axis 11 as a fulcrum, the attachment / detachment unit 1 and the working unit 3 can be arranged to be relatively inclined. FIG. 17 is a side view of a working machine according to an embodiment, showing an example of being mounted on a boom device mounted on a traveling body, and will explain a figure showing a case where the direction of a groove with respect to the vertical direction is different from the direction of the traveling body. During operation, even if the inclination of the side groove and the road surface on which the traveling body travels are relatively inclined in the vertical direction along the traveling direction, as shown in FIG. 17, the working unit 3 can be arranged along the inclination of the side groove on one side. Therefore, even if there is a difference in inclination between them, the operation can be performed without worrying about the angle of the front and rear inclination of the working unit 3. As can be seen from the comparison between FIG. 17 and FIG. 13, at point E, the lower surface of the attachment / detachment unit 1 abuts against the downward rotation restricting portion 131 of the first restricting unit 13, and by abutting against the lower surface of the attachment / detachment unit 1, the rotation of the first member 15 is restricted. l4 is the traveling surface of the traveling body A.

[0025] Since the working unit 3 arranged in the groove C is pulled by the leading attachment / detachment unit 1, it can move along the wall surface of the groove portion C without using a special driving device. When moving along the groove side portion C2 which is the wall surface of the groove portion C, the rod-shaped guide member 66 (or the curved portion 67 provided in the guide member 66) provided on the side of the working unit 3 abuts against the groove side portion C2, thereby preventing damage to the main body of the working unit 3.

[0026] The working unit 3 is rotatably supported with respect to the attachment / detachment unit 1 by two axes of the second axis 21 and the third axis 22. Even if the side groove and the traveling body arranged in parallel approach or move away from each other relatively, the second member 2 rotating about the second axis 21 and the third axis 22 can absorb the difference in distance. There is no angle between the attachment / detachment unit 1 and the working unit 3 with respect to the traveling direction, and they can move in parallel while maintaining a parallel angle to each other. Therefore, the operator does not need to frequently steer the traveling body, and the operation becomes easier.

[0027] As shown in FIG. 12 which is a plan view of the side mounted on the boom device B mounted on the traveling body A, FIG. 13 which is an example of being mounted on the boom device B mounted on the traveling body A and is a view seen from the left side in the traveling direction, and FIG. 14 which is an example of being mounted on the boom device B mounted on the traveling body A and is a view seen from the rear in the traveling direction, it is not limited to the work in a state where there is no relative angular difference between the traveling body A and the working machine D in the left - right direction with respect to the traveling direction. As shown in FIG. 16, even when there is a relative angular difference in the left - right direction with respect to the traveling direction between the groove C and the traveling direction of the traveling body, either one of the second member 2 and the working part 3 arranged on the second shaft 21 and the third shaft 22 rotates more than the other, or each of the second member 2 and the working part 3 rotates in the same direction in plan view, so that the working part 3 can cause a relative angular difference with respect to the left - right in the traveling direction with respect to the mounting.

[0028] FIGS. 9, 10, and 11 are explanatory views of the working machine according to the embodiment, showing the state of rotation about the first axis to the third axis. l2 is the direction of the working part 3. l3 is the direction of the traveling body A or the attachment / detachment part 1. In any case, the attachment / detachment part 1 and the working part 3 rotate in the relative left - right direction and the work can be performed. Even in the case shown in FIG. 15 which is a plan view showing an example of being mounted on the boom device mounted on the traveling body, where the traveling body moves away from the groove part and travels parallel to the direction of the groove, the work can be performed. The working part 3 can absorb the difference in the relative left - right distance between the groove C and the traveling body A that are parallel to each other by moving in the relative left - right direction with respect to the attachment / detachment part 1 even when such a difference occurs.

[0029] Even in the case shown in FIG. 16 which is a plan view of the working machine and is a plan view of an example of being mounted on the boom device mounted on the traveling body, showing the case where there is an angular difference in the left - right direction between the direction of the groove and the traveling direction of the traveling body, 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-right direction with respect to the traveling direction of the traveling body A that are not parallel to each other and the left-right direction of the groove direction of the side groove C, the attachment / detachment part 1 and the working part 3 rotate in the relative left-right direction, so that the difference in the left-right angle between the groove C and the traveling body A can be absorbed. Therefore, the operator does not have to frequently operate the operating devices for steering the traveling body A, and the operation becomes easier.

[0030] Since the rotation angles of the first member 15, the second member 2, and the working part 3 are regulated by the first regulating part 13, the second regulating part 14, and the third regulating part 23, the positional relationship of the working part 3 with respect to the attachment / detachment part 1 can be limited. That is, even when the working part 3 is located outside the groove C, the working part 3 can be positioned with moderation with respect to the attachment / detachment part 1, and it is easy to arrange the working part 3 in the groove C using the boom device B.

[0031] This working machine D is arranged in a groove part C such as the laid side groove C, and performs an operation of removing and discharging sediment, mud, etc. accumulated in the groove C to the outside of the groove C. The working machine D in the embodiment is provided at the tip of the boom device B, and by deploying this boom device B, it is possible to work in the groove C located far from the traveling body A. Since the first shaft 11, the second shaft 21, and the third shaft 22 are located above the groove C, the rotation of the first member 15, the second member 2, and the working part 3 is not hindered by the groove C.

[0032] The configuration of the working part 3 will be described. 4 is an auger case that constitutes the working part 3. As shown in FIGS. 3 and 4, the auger case 4 has a box shape with the front and bottom opened, and is provided in the working part 3 arranged in the groove part C. An auger 44 is installed in the auger case 4.

[0033] The rear surface of the auger case 4 is curved in an arc shape along the outer circumference of the rotation of the auger 44 as shown in FIGS. 2 and 4. This curved surface is arranged close to the outer circumference of the rotation of the auger 44. For this reason, it is possible to prevent an object W that moves rearward and then upward from leaking out in the radial direction by 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 surface of the auger case 4 is directed downward and forward. The lower end of the curved surface is provided at a position substantially the same as or slightly higher than the lower end of the outer periphery of rotation of the auger 44. By the lower end moving relative to the bottom C1 of the groove as it advances, it is possible to scoop up the object W remaining on the bottom C1 of the groove without being moved by the auger 44. Thereafter, the object W placed on the curved surface on the rear surface of the auger case 4 is moved upward by the auger 44 (central scraping portion 442). The auger case 4 has a side plate 43 that supports the rotation shaft 41 and covers the lateral sides of the auger 44.

[0035] 41 is a rotation shaft. The rotation shaft 41 is a shaft arranged horizontally in the auger case 4 and is rotationally driven. In the embodiment, as shown in FIGS. 1 and 2, the rotational power of the motor 51 provided behind the auger case 4 outside the auger case 4 is transmitted to the pulley 52 fixed integrally with the rotation shaft 41 provided on the side of the auger case 4 via transmission members such as a belt 53 or a chain. The motor 51 may be of an electric or hydraulic type.

[0036] 42 is a bearing or a bearing portion. 45 is a support arm. The auger 44 includes a support arm 45 fixed integrally with the rotation shaft 41. The bearing 42 supports the rotation shaft 41 inside the auger case 4. Since the bearing 42 is positioned inside the side plate 43 of the auger case, it prevents the bearing 42 from protruding outward from the auger case 4. The long plate-shaped support arm 45 that connects and fixes the rotation shaft 41 and the side scraping portion 441 of the auger 44 has one end fixed at a joint portion 444 provided in the middle of the side scraping portion 441 and the other end fixed in the vicinity of the bearing 42. Therefore, the support arm 45 can reduce the moment load applied to the rotation shaft 41 by the bearing 42 directly receiving the load applied in the direction orthogonal to the rotation shaft 41 received by the side scraping portion 441, and prevent the rotation shaft 41 from being damaged.

[0037] The auger 44 is arranged on the rotating shaft 41, rotates integrally with the rotating shaft 41 to scrape the object W, and can throw the object W. As shown in FIGS. 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 continuously formed and fixed to the rotating shaft 41 by the support arm 45. The central scraping portion 442 is provided at an intermediate portion of the rotating shaft 41 of the auger 44, is continuously formed from the side scraping portion 441, and has a flat surface portion 442a facing in a direction orthogonal to the axial direction of the rotating shaft 41.

[0038] Each of the side scraping portions 441 provided on the left and right of the central scraping portion 442 of the auger 44 is formed in a shape that is symmetric with respect to the central scraping portion 442. The auger 44 in the embodiment is configured by providing the central scraping portion 442 and the side scraping portions 441 at two locations at equal intervals around the rotating shaft 41 when viewed from the axial direction, but the number is not limited to these. By rotating around the rotating shaft 41, which is a horizontal axis directed in the left - right direction with respect to the traveling direction, the auger 44 scrapes the object W such as deposited earth and sand existing in front of the auger 44 and throws it upward. The rotation direction of the auger 44 in the embodiment is, when viewed from the axial direction of the rotating shaft 41, such that the upper side of the radially - leading end of the rotating auger 44 rotates forward and the lower side rotates backward. That is, it is a down - cut.

[0039] The central scraping portion 442 provided on the auger 44 will be further described. The central scraping portion 442 has a flat surface portion 442a formed in a plate shape on a plane. The width of the flat portion 442a of the central scraping portion 442 facing in a direction orthogonal to the axial direction of the rotary shaft 41 in the axial direction of the rotary shaft 41 increases as it goes in the radial direction with respect to the radial direction of the rotary shaft 41. The flat portion 442a is continuously formed from the side scraping portion 441 through the intermediate portion 442b. As shown in FIGS. 3 and 4, the intermediate portion 442b has a shape in which one or more triangular planes facing the apex in the radial direction are continuously joined together, or alternatively, although not shown, a shape curved so that the radius of curvature decreases as it goes in the radial direction from the rotary shaft 41, thereby connecting the side scraping portion 441 and the flat portion 442a. Therefore, the flat portion 442a is formed in a triangular shape with the rotary shaft 41 side as the apex, or a trapezoidal shape with the rotary shaft 41 side as the short side.

[0040] As shown in FIG. 2, the flat portion 442a is formed so that the surface widens in the radial direction with respect 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 portion 442a can smoothly move in the radial direction. On the other hand, when scraping the object W in front of the auger 44 with the central scraping portion 442, the flat portion 442a that widens in the radial direction can secure the width by which the central scraping portion 442 can scrape the object W.

[0041] The width of the flat portion 442a is desirably widened about 1.5 to 2 times toward the rotation radius side with reference to the width on the rotation axis 41 side. In the illustration, 1.8 times is adopted. The less the contact area of the object W, the less the friction, and the easier it is to move on the flat portion 442a. Since the width of the flat portion 442a in the rotation axis direction increases as it goes in the radial direction, when the object W on the flat portion 442a moves in the radial direction by centrifugal force, the chance of contact with the side intermediate portion 442b and the side scraping portion 441 on the side is greatly suppressed, and an increase in friction can be prevented. Therefore, the object W located on the flat portion 442a of the central scraping portion 442 can be moved to the outer end portion with respect to the radial direction of the flat portion 442a by centrifugal force without generating unnecessary frictional force. Then, the object W that has reached the outer end portion of the flat portion 442a leaves the flat portion 442a and is thrown toward the chute 71 side. The outer peripheral side of the tip in the rotation radius direction of the side scraping portion 441 and the central scraping portion 442, which is the outer periphery of the rotation region of the auger 44, is formed so as to have no unevenness throughout. For this reason, the risk of damaging the structure of the side groove C, which is the groove C formed in advance, is reduced, and the object W at the groove bottom C1 can be scraped cleanly.

[0042] The side scraping portion 441 provided on the auger 44 will be further described. As shown in FIG. 2, the auger 44 includes a side scraping portion 441 inclined from the end of the rotation axis 41 toward the middle portion of the rotation axis 41. The side scraping portion 441 shown in FIGS. 2, 3, 4, 6, 7, etc. is arranged at an angle such that when viewed from a direction orthogonal to the rotation axis 41 (for example, the front), the surface is inclined inward with respect to the axial direction of the rotation axis 41. The side scraping portion 441 can scrape the soil at the end of the working width, which is the width of the auger 44 in the workable width and the left-right width with respect to the traveling direction, and move it toward the center side.

[0043] All of the radially outer ends in the rotational direction of the side scraping portion 441 are formed so as to pass through the region of the tip portion with respect to the radius in which the auger 44 rotates, as shown in FIG. 4 in a side view. That is, the side scraping portion 441 is formed in an arc shape in a side view. For this reason, 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 central portion of the auger 44, and continuously moves the object W to the central portion of the auger 44 as the side scraping portion 441 rotates.

[0044] The side scraping portion 441 provided on the auger 44 is on the end side of the rotary shaft 41 and has a pointed portion 443 provided in the forward direction of the rotational direction. The pointed portion 443 is located on the end side with respect to the axial direction of the rotary shaft 41 from the support arm 45. The pointed portion 443 protrudes forward in the rotational direction from the support arm 45 that fixes the side scraping portion 441 to the rotary shaft 41. The pointed portion 443 becomes sharper as it goes in the radial direction with respect to the rotation radius.

[0045] As shown in FIG. 4 in a side view, the width of the pointed portion 443 provided by the side scraping portion 441 is provided to be smaller than the width of the side scraping portion 441 on the central scraping portion 442 side. For this reason, the object W located directly below the pointed portion 443 can be easily pierced by the pointed portion 443 due to rotation, and the object W that relatively moves to the auger 44 side so as to be continuous during progress can be separated. When viewed from a direction orthogonal to the axial direction of the rotary shaft 41, the pointed portion 443 is arranged closer to the side plate 43 of the auger case 4 than the joint portion 444 with the support arm 45 and in the vicinity of the side plate 43. For this reason, it is possible to prevent the support arm 45 from coming into contact with the auger case 4 and to ensure the maximum working width of the auger 44 within the auger case 4.

[0046] While ensuring the working width of the auger 44 and preventing damage to the rotating shaft 41, the rotation area of the sharp part 443 is arranged to move to the outer peripheral side in the radial direction of the bearing 42, so that the object W cannot reach the bearing part 42 directly. Further, since the tip of the sharp part 443 rotates close to the side plate 43 of the auger case, even if an object W such as earth and sand adheres to the side plate 43, it can be scraped off by the sharp part 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 part 42, and the sharp part 443 moves to the outer peripheral side in the radial direction of the bearing part 42 by rotation, so that the operation of the auger 44 can be continuously performed in an appropriate state.

[0047] As shown in FIG. 4, spaces S through which the object W can pass are respectively secured between 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, it can escape from this space S to the end side of the rotating shaft 41. Therefore, it is not necessary to set the rotational driving force required for scraping the object W by the auger 44 to be excessive, preventing the entire device from becoming bulky.

[0048] As shown in FIG. 4, the width of the space S in the radial direction from the center side of the rotating shaft 41 to the radial tip in the side view is formed to gradually decrease from the sharp part 443 toward the central scraping part 442. That is, the working height in the radial direction from the center side of the rotating shaft 41 to the radial tip of the side scraping part 441 in the side view gradually increases from the sharp part 443 toward the central scraping part 442. By forming it in this way, the object W that is gradually scraped together from the end side of the rotating shaft 41 and whose bulk increases can be moved to the central scraping part 442 side without being left behind by the side scraping part 441 where the working height that gradually pushes it increases.

[0049] On the other hand, when the bulk of the object W moved by the side scraping part 441 increases excessively, it is prevented that an excessive rotational load is applied to the rotating shaft 41 by allowing it to escape from the space S to the rear in the rotation direction of the side scraping part 441. Since the space S on the side scraping part 441 closer to the central scraping part 442 is provided to be small, when the object W is thrown by the central scraping part 442, the amount leaking from the side space S can be suppressed. The ratio of the width of the space S in the direction from the center of the rotation axis toward the outside in the radial direction in the side view of the side scraping part 441 is such that when the working height of the side scraping part 441 on the tip side of the pointed part 443 is set to 1, the width of the space S is 1 to 1.5, and as it goes from the pointed part 443 toward the central scraping part 442 side, the width of the space S is 0.2 to 0.5, and the working height of the side scraping part 441 is gradually changed to about 1.5 to 1.8.

[0050] The central scraping part 442 formed continuously from the side scraping part 441 scrapes the object W at the center with respect to the working width of the auger 44 and throws the object W collected by the side scraping part 441 and the central scraping part 442 upward. The object W thrown by the central scraping part 442 is guided by the chute 71 located above the auger 44 at a position slightly behind the center with respect to the width direction of the auger case 4 and is thrown outside the groove C.

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

[0052] The operation of the auger 44 will be described. When the object W reaches within the rotation region of the auger 44 and reaches the pointed part 443, the pointed part 443 pierces it. Then the object W either moves directly to the central scraping part 442 side by the side scraping part 441 or is struck against the bottom C1 of the groove directly below the rotation region by the centrifugal force of the rotating pointed part 443. The object W struck against the bottom C1 of the groove will break due to the impact and become loose. Then, again, the side scraping part 441 moves the bottom C1 of the groove in the width direction with respect to the traveling direction, and the object W reaches the central scraping part 442. The object W that has reached the flat part 442a of the central scraping part 442 relatively moves backward by the central scraping part 442 and reaches the curved surface on 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 and moves upward, and is thrown upward through the chute 71.

[0053] When the object W reaches within the rotation region of the auger 44 and reaches the central scraping part 442, the object W relatively moves backward and is thrown upward by the central scraping part 442. Or, even if the object W is struck against the bottom C1 of the groove directly below the rotation region by the central scraping part 442, the object W will break and become loose due to the impact, so it is easy to scrape by the rotating central scraping part 442. Then, it moves backward by the flat part 442a of the central scraping part 442 and reaches the curved surface on 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 and moves upward, and is thrown upward.

[0054] 61 is a scraper. The scraper 61 is a plate-shaped member and is provided so as to span in the width direction of the auger case 4 at the lower part of the auger case 4. As shown in FIG. 4, FIG. 6 and other figures, the scraper 61 is provided in front of the auger 44 and is 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 arranged near the outside of the rotation region of the auger 44, and the rear end side is provided so as to overlap the rotation region of the auger 44 as shown in FIG. 6 in plan view.

[0055] The scraper front end portion 65, which is the front end of the scraper 61, is positioned slightly above the lower end of the rotation region of the auger 44 or at the same height as the lower end of the rotation region of the auger 44 in a side view in the direction of the rotation axis 41 of the auger 44. Therefore, the scraper front end portion 65 protruding forward and downward is prevented from being caught by a small step existing in the groove C due to the forward movement, and the working portion D is prevented from being unable to move forward. That is, although the auger 44 is the lowermost end of the working portion 3 and contacts the groove bottom portion C1, the outer peripheral portion of the rotating auger 44 has no unevenness and is circular in side view, so it can overcome the step even if there is one.

[0056] 54 shown in FIGS. 1, 2, and 6 is an inclined plate portion. The inclined plate portion 54 in plan view is provided at the front portion of the auger case side plate 43 and is inclined so as to face outward in the width direction with respect to the traveling direction as it goes forward. The inclined plate front end portion 55, which is the front end portion of the inclined plate portion, is arranged outward in the width direction with respect to the traveling direction from the end portion of the rotation axis 41 and the side end portion of the scraper 61. In a side view, the inclined plate front end portion 55 of the inclined plate portion 54 is inclined so as to face rearward with respect to the traveling direction as it goes from above to below. And the upper portion of the inclined plate front end portion 55 is arranged so as to protrude forward from the scraper front end portion 65 of the scraper 61. The inclined plate front end portion 55 of the inclined plate portion 54 configured as described above can contact the groove side portion C2 of the groove C and can peel off an object adhering to the groove side portion C2 due to the forward movement of the working machine D. A scraper 61 is arranged in front of the rotation region of the auger 44 on the lower end side of the inclined plate portion 54. 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 along with the forward movement of the machine body, and then further moves rearward and is thrown by the auger 44.

[0057] The inclined plate portion 54 of the present invention collects an object W such as sediment located outside the working width of the auger 44 and on the side outside the working width of the auger 44 with a working width narrower than the groove C width. Further, the object W adhering to the groove side portion C2, which is the wall surface of the groove C, is peeled off and collected and thrown by the auger 44. The inclined plate portion 54 is positioned in front of the rotation region of the auger 44 in a side view and is provided in front of the side plate 43 of the auger case 4. Also, the height of the inclined plate portion 54 is provided to be substantially the same as the height of the rotation region of the auger 44. Before the advancing auger 44 arrives, the object W on the groove side portion C2 can be peeled off in advance.

[0058] The front end portion 55 of the inclined plate of the inclined plate portion 54 is arranged outside the advancing direction with respect to the end portion of the bearing portion 42 that supports the rotation shaft 41 of the auger 44. The front end portion 55 of the inclined plate will protrude most outward in the width direction by the working machine D. Therefore, the front end portion 55 of the inclined plate can collect the object W on the groove side portion C2 that exists outside the working width of the auger 44 and cannot be reached by the auger 44. Since the front end portion 55 of the inclined plate is inclined so as to go backward with respect to the advancing direction as it goes from above to below in a side view, the tip portion in contact with the groove side portion C2 can gradually peel off the object W from above as it advances. Therefore, the resistance when scraping off the object W from the groove side portion C2 can be reduced, and the front end portion 55 of the inclined plate will not deviate from the groove side portion C2 due to the resistance. That is, there is no remaining peeling, and the object W does not adhere to the groove side portion C2 after peeling off, so the groove side portion C2 is finished neatly. The front end portion 55 of the inclined plate in a front view is inclined so as to go inward with respect to the width in the advancing direction as it goes from above to below. Since the cross section of the existing groove C is formed to gradually become narrower as it goes downward, by matching this, the object W on the groove side portion C2 can be efficiently and neatly swept off.

[0059] 66 is a guide member. The guide member 66 is provided below the working portion 3 and outside the side plate 43. The guide member 66 is composed of a long member provided long in the front-rear direction. In the embodiment, it is formed using a round bar. The guide member 66 is positioned at the lower end portion of the inclined plate portion 54 and is positioned to pass through the same position as the lower end portion of the inclined plate portion 54 or slightly outside. The guide member 66 can pass through the same position as the lower end of the front end of the inclined plate 55 or slightly outside the lower end of the front end of the inclined plate 55 by moving forward. Since the guide member 66 is a long member provided longitudinally in the front-rear direction, by contacting the groove side portion C2, which is the wall surface, in this longitudinal direction, the auger case 4 can be arranged in an appropriate state aligned with the groove C direction. When the working part 3 is arranged in the groove C along the traveling direction, the guide member 66 can contact the groove side portion C2 of the groove C and guide the working part 3 along the groove C. Therefore, the auger case 4 including the inclined plate portion 54 can perform work in the groove C properly.

[0060] Since the guide member 66 passes through the same position as or outside the lower end of the inclined plate portion 54, even if there are steps or irregularities in the groove side portion C2, which is the wall surface portion in the groove C, it is possible to prevent the front end of the inclined plate portion 54 from being caught by this and hindering the forward movement of the working 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 arranged in the groove C having an inclined wall surface is in a groove C width narrower than the left-right width of the guide members 66 located on the left and right of the auger case 4, it can rise along the inclination of the groove side portion C2 and prevent self-destruction of the working machine D due to biting into 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. The curved portion 67 curves inward with respect to the width in the traveling direction from the front end of the inclined plate 55 as it goes forward in the traveling direction, and the front end of the curved portion 67 is provided at a position protruding forward from the front end of the scraper 65 and the front end of the inclined plate 55. The tip of the guide member 66 has a curved portion 67 curved inward. Even if there are irregularities in the wall surface portion in the groove C that the guide member 66 contacts, the auger case 4 can be guided without being caught. Also, even if the groove C width becomes narrow, by sensing it in advance with the curved portion 67, it is possible to cause the working machine D to rise along the groove side portion C2, which is the wall surface of the groove C.

[0062] The scraper 61 will be further described. Since the left and right sides of the scraper 61 are provided wider than the working width of the auger 44, the object W supplied to the auger 44 can be surely peeled off from the bottom C1 of the groove. And the object W in the lifted state can be scraped backward and moved by the auger 44. That is, since the aggregated object W does not enter the rotation area of the auger 44 while sticking to the bottom C1 of the groove, it is possible to prevent an excessive load from being applied to the auger 44.

[0063] The scraper 61 of the embodiment of the present invention is located in front of the auger 44 and can peel off the object W, which is earth and sand hardened as it advances, from the bottom C1 of the groove C in advance. In the case where there is no scraper 61, the object W that sticks to the bottom C1 of the groove and is in a hardened state will be scraped by the auger 44 itself, which is a rotating body. In this case, the auger 44 will be responsible for both the action of peeling the stuck object W from the bottom C1 of the groove and the action of crushing the hard object W and moving it backward while pulling it toward the center side. For this reason, the load required for rotation of the auger 44 becomes large, and a large amount of energy is required for driving.

[0064] The rear end portion of the scraper 61 is inclined forward and backward so as to lift with respect to the front end portion 65 of the scraper. Further, this rear end portion is provided at a position overlapping with the rotation area of the auger 44 in plan view. Thereby, the object W that has risen from the bottom C1 of the groove by the scraper 61 and reached the auger 44 can be moved to the rear side by the auger 44.

[0065] Since the front end portion 65 of the scraper 61 peels off the object W from the bottom of the groove C in advance as it advances, the auger 44 is made unnecessary to peel off from the groove bottom surface C1. Since the rear end portion of the scraper 61 is located immediately before the rotation area of the auger 44, the peeled object W pushed out to the rear end side of the scraper 61 as the machine body advances can easily reach the auger 44.

[0066] Furthermore, the scraper 61 is provided with a vibration mechanism to facilitate the peeling 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 vibratable in the front-rear or up-down direction. Rods 62 are attached rearward from both the left and right ends of the scraper 61. 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 for passing through the rod 62 and slidably holding the rod 62. In the embodiment, the support shaft 63 uses a round bar, and the axial direction of this shaft is oriented in the left-right direction with respect to the traveling direction. Further, a through hole is provided in a direction intersecting the axial direction of the round bar. The support shaft 63 is provided in the auger case 4 and is provided parallel to the rotary shaft 41, and supports the rods 62 fixed to both the left and right ends of the scraper 61.

[0067] Reference numeral 64 denotes a camshaft. The camshaft 64 is disposed at the end of the rotary shaft 41, rotates integrally with the rotary shaft 41, and performs an eccentric motion. The rod 62 connects the scraper 61 and the camshaft 64 via the support portion 63. A bearing 62a is provided at the rear end portion 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 the support portion 63 provided on the side plate 43 of the auger case 4. Note that the support portion 63 is provided rotatably about the left-right direction axis with respect to the side plate 43. Further, the rod 62 is slidable in the longitudinal direction by the support portion 63. The rod 62 extends further rearward than the support portion 63 and reaches the rotary shaft 41. At the shaft end portion of the rotary shaft 41, there is a camshaft 64 fixed integrally with the rotary shaft 41, and the rear end portion of the rod 62 is connected to the camshaft 64 via a bearing 62a.

[0069] When the rotating shaft 41 of the auger 44 rotates, the camshaft 64 also rotates integrally and performs an eccentric motion. The rod 62 receiving this eccentric motion slides on the support portion 63, and the front side swings up and down with the support portion 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 as shown by the solid line and the broken line in FIG. 8, the front end portion 65 of the scraper of the scraper 61 swings up and down. l1 is the swing orbit of the tip of the scraper 61. The scraper 61 positioned between the object W and the groove bottom C1 enters between the object W and the groove bottom C1 so as to scrape the object W from the groove bottom C1 by the back-and-forth vibration, and can be peeled off from the groove bottom. Furthermore, since the front end portion 65 of the scraper 61 vibrates up and down, it further facilitates peeling the object W from the groove bottom. b1 is the lower end portion of the scraper 61. Due to the up-and-down 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. 8.

[0070] As the machine body advances, the object W that moves rearward on the scraper 61 and is pushed forward by the front object W can loosen the object W by the front-rear vibration and up-and-down vibration of the scraper 61. That is, hard-packed soil or this mass can be loosened and softened by the vibration of the scraper 61. Thereafter, the object W that has reached the auger 44 is accumulated and thrown upward by the side scraping portion 441 and the central scraping portion 442. Since the object W is loosened and softened, the auger 44 can move the object W little by little toward the center side 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.

[0071] 71 is a chute. 711 is a chute connection port. At the upper center of the auger case 4, a cylindrical or U-shaped chute 71 is provided, and the upper part of the auger case 4 is open through the chute 71. Due to the central scraping part 442 of the auger 44 and the curved surface at the rear of the auger case 4, for an object W that has moved upward with the radial direction blocked, the blockage will be released at the lower part of the chute 71. Then, the object W moves radially 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 illustration, the chute 71 is curved to the right in the advancing direction, and the object W thrown upward has its trajectory corrected to the right. Therefore, the object W is thrown upward to the right. The trajectory of throwing the object W can be discharged in an arbitrary direction by adjusting the bending direction of the chute 71.

Explanation of Signs

[0072] 1 Detachable part 2 Second member 3 Working part 4 Auger case 44 Auger 11 First shaft 13 First regulating part 14 Second regulating part 15 First member 21 Second shaft 22 Third shaft 23 Third regulating part 441 Side scraping part 442 Central scraping part 443 Sharp part 41 Rotation shaft 43 Side plate 54 Inclined plate part 61 Scraper 66 Guide member C Groove part D Working machine

Claims

1. An auger that can scrape off objects by rotating and throw them; an auger case having a side plate that supports the auger and covers a side portion of the auger; a guide member that is long in the front-rear direction and has a curved portion whose tip portion is curved inward, the guide member being provided on the outer side of the width of the side plate in the traveling direction; A work machine comprising:

2. The auger case is disposed in a groove such as a street gutter, The guide member is capable of abutting against a groove side portion of the groove portion.

2. The work machine according to claim 1 .

3. The side plate includes an inclined plate portion inclined toward the outside in the width direction relative to the traveling direction as it moves forward at a front portion of the side plate, The inclined plate portion has an inclined plate front end portion that is inclined toward the rear 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 portion of the inclined plate.

3. A work machine according to claim 1 or 2.

4. A scraper is provided in front of the auger and is inclined so that the rear side is higher than the front side, The curved portion is provided at a position protruding forward in the direction of travel from the front end portion of the scraper.

3. A work machine according to claim 1 or 2.

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