Tilt Check Tool

Abstract

To provide a tilt confirmation tool that enables an operator of a construction machine to operate an attachment while grasping the state of tilt without getting on or off a driver's seat, even if the ground in an area where the construction machine is located is inclined in a complex manner. [Solution] The tilt confirmation tool 1 comprises a tool body 2, a first detection unit 4 attached to the tool body 2 and capable of detecting vertical tilt relative to a predetermined first horizontal direction, and a second detection unit 5 attached to the tool body 2 and capable of detecting vertical tilt relative to a second horizontal direction perpendicular to the first horizontal direction, making it possible to check the tilt state of the hydraulic excavator bucket.

Description

[Technical field]

[0001] The present invention relates to an inclination confirmation tool for a construction machine that enables an operator to visually confirm the inclination state of an attachment of a construction machine when operating the attachment to perform construction work. [Background technology]

[0002] It is known that when forming a slope on the side of a road, cutting or filling earth is performed using a bucket attached to the end of the arm of a hydraulic excavator. For example, when cutting earth, the operator of the hydraulic excavator cuts out the ground with the bucket by moving the bucket diagonally upward or downward while maintaining the bucket at a predetermined angle with respect to the horizontal direction in order to form a slope with a desired gradient.

[0003] When performing this slope formation work using a conventional goniometer, the operator must repeatedly get out of the hydraulic excavator's seat, use the goniometer to check the bucket angle, then return to the seat and operate the bucket, which takes a lot of time and creates the problem that differences in operation experience are easily evident.

[0004] To deal with this, it is known that a tilt checking tool that enables visual confirmation of the tilt state of the bucket of a hydraulic excavator from the operator's seat is attached to the bucket during work. For example, the tilt checking tool disclosed in Patent Document 1 includes a tool body made of a frame extending in a substantially L-shape in side view, and first and second rotors that are disk-shaped and have the same rotation axis, and the first and second rotors are attached to the tool body in a position where the rotation axis extends horizontally and are lined up.

[0005] The first rotating body is rotatable relative to the tool body, has a misalignment check mark at a predetermined position on its outer periphery, and has a weight portion fixed at a predetermined position near the outer periphery. Therefore, even if the attitude of the tool body changes, the first rotating body rotates so that the weight portion is always directly below the rotation axis. On the other hand, the second rotating body is capable of changing its rotational position around the rotation axis relative to the tool body, and has a reference mark at a predetermined position on its outer periphery.

[0006] For example, when performing cutting work, the attitude of the bucket is changed so that it is at an angle corresponding to the gradient of the slope to be formed, and then the tool body is fixed to the opening peripheral portion of the bucket so that the rotational axes of the first and second rotors are oriented to extend in the same direction as the rotational axis of the bucket relative to the arm of the hydraulic excavator and so that the misalignment confirmation mark of the first rotor is in a position visible from the operator's seat, and the second rotor is rotated so that the reference mark is aligned side-by-side with the misalignment confirmation mark of the first rotor.The operator then operates the bucket to perform cutting work while maintaining the misalignment confirmation mark of the first rotor aligned side-by-side with the reference mark of the second rotor, thereby forming a slope with no variation in gradient. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Utility Model Registration No. 3224829 Summary of the Invention [Problem to be solved by the invention]

[0008] Incidentally, when forming a slope beside a road, it is common to use a bucket to cut out the ground at a prescribed angle, then move the hydraulic excavator on its crawlers a prescribed distance in the direction of travel of the road so that part of the bucket overlaps the cut-out area, and then cut the ground at that position; by repeating this process, a slope that runs along the road is formed.

[0009] However, if the road in the area where cutting work is to be performed is inclined in the direction of travel compared to the area where cutting work was previously performed, even if a tool such as that described in Patent Document 1 is used, the cutting work will be performed with the bucket tilted in the direction of travel on the road, and there is a risk that a neat slope will not be formed in the direction along the road.

[0010] The present invention has been made in consideration of the above points, and its object is to provide a tilt confirmation tool that allows the operator of a construction machine to operate an attachment while grasping the tilt state without getting in and out of the operator's seat, even if the ground in the area where the construction machine is located is inclined in a complex manner. [Means for solving the problem]

[0011] In order to achieve the above object, the present invention is characterized by being devised so that an operator of a construction machine can grasp the inclination of the attachment in two directions from the operator's seat.

[0012] Specifically, the company took the following measures targeting tilt confirmation tools that can check the tilt state of construction machinery attachments:

[0013] That is, the tilt confirmation tool of the first invention is characterized by comprising a tool body having a detachable part that is detachable from the attachment, a first detection unit attached to the tool body and capable of detecting upward and downward tilt relative to a predetermined first horizontal direction, and a second detection unit attached to the tool body and capable of detecting upward and downward tilt relative to a second horizontal direction perpendicular to the first horizontal direction. The tilt confirmation tool configured in this manner functions to enable the operator of a construction machine to look at the tool attached to the attachment and confirm the up and down tilt of the attachment in two perpendicular horizontal directions.

[0014] The tilt confirmation tool of the second invention is characterized in that, in the first invention, the first detection unit comprises a first rotating body configured to be freely rotatable around a first rotation axis extending in the second horizontal direction and having a first mark at a predetermined position on its outer circumferential edge, a first weight fixed at a predetermined position near the outer circumferential edge of the first rotating body, and a first reference body configured to be rotatable around the first rotation axis and having a first reference mark at a predetermined position on its outer circumferential edge. The tilt checking tool configured in this manner operates to make it possible to check the tilt of the attachment with respect to the first horizontal direction with a simple mechanism.

[0015] The tilt confirmation tool of the third invention is characterized in that, in the second invention, the second detection unit comprises a second rotating body configured to be freely rotatable around a second rotation axis extending in the first horizontal direction and having a second mark at a predetermined position on its outer circumferential edge, a second weight fixed at a predetermined position near the outer circumferential edge of the second rotating body, and a second reference body configured to be rotatable around the second rotation axis and having a second reference mark at a predetermined position on its outer circumferential edge. The tilt checking tool configured in this manner operates to enable checking of the tilt not only with respect to the first horizontal direction, but also with respect to the second horizontal direction perpendicular to the first horizontal direction, with a simple mechanism.

[0016] The tilt confirmation tool of a fourth invention is characterized in that, in any one of the first to third inventions, the second detection unit is attached to the tool body so as to be positioned above the first detection unit. In the tilt checking tool configured in this manner, when the tool is fixed to an attachment, the second detection unit acts to be more easily visible from the cockpit than the first detection unit.

[0017] The tilt confirmation tool of the fifth invention is characterized in that, in the second invention, the second detection unit is configured to be freely rotatable around a second rotation axis extending in the first horizontal direction, and comprises a third rotating body having a third mark at a predetermined position on its outer circumferential edge, and a third weight fixed at a predetermined position near the outer circumferential edge of the third rotating body, and the first detection unit is arranged to the side of the second detection unit, and the first reference mark is positioned outside the outer circumferential edge of the third rotating body. The inclination checking tool configured in this manner operates to enable checking of not only the inclination of the attachment with respect to the first horizontal direction but also the inclination with respect to the second horizontal direction with an even simpler mechanism than that of the third aspect of the invention.

[0018] The tilt confirmation tool of the sixth invention is characterized in that, in the second or fifth invention, the first reference body has a circular or regular polygonal shape whose central axis coincides with the first rotation axis and its outer shape is designed to be larger than the outer shape of the first rotating body, the first reference marks are formed in a pair symmetrically on either side of the first rotation axis, and the first marks extend in a straight line passing through the first rotation axis with each end reaching the edge of the first rotating body. With the tilt confirmation tool configured in this manner, when adjusting the tilt state of the attachment, the posture of the attachment is changed while looking at two locations: the position of one end of the first reference mark corresponding to one first reference mark, and the position of the other end of the first reference mark corresponding to the other first reference mark. Effect of the Invention

[0019] The tilt checking tool of the first invention allows the operator of the construction machine to check the up and down tilt of the attachment in two orthogonal horizontal directions by looking at the tool attached to the attachment. Therefore, the operator of the construction machine can operate the attachment while checking the tilt of the attachment in two directions without getting on or off the operator's seat, and can, for example, accurately and efficiently form ground or slopes over a wide area using the construction machine.

[0020] In the tilt checking tool of the second invention, when the tool is attached to an attachment, the first rotating body rotates relative to the tool body so that the first weight is always located directly below the rotation axis of the first rotating body when the attachment is tilted up or down relative to the first horizontal direction. The first reference body is then rotated to set the first reference mark to be aligned side-by-side with the first mark of the first rotating body, and the attachment is operated to maintain the side-by-side position of the first mark relative to the first reference mark, so that the attachment operates in a state where it is maintained at a desired tilt in the first horizontal direction. In this way, the tilt of the attachment relative to the first horizontal direction can be checked with a simple mechanism, and the tool can be made low-cost.

[0021] In the tilt checking tool of the third invention, when the tool is attached to an attachment, the second rotating body rotates relative to the tool body so that the second weight is always located directly below the rotation axis of the second rotating body when the attachment is tilted up and down relative to the second horizontal direction perpendicular to the first horizontal direction. The second reference body is rotated to set the second reference mark to be aligned side by side with the second mark of the second rotating body, and the attachment is operated so that the side-by-side position of the second mark relative to the second reference mark is maintained, so that the attachment operates in a state where a desired tilt is maintained in the second horizontal direction. In this way, not only the tilt of the attachment relative to the first horizontal direction but also the tilt of the attachment relative to the second horizontal direction can be checked with a simple mechanism, so that even if the posture required of the attachment relative to the horizontal plane is complicated, work can be performed while checking the tilt in two directions with the first and second detection units, and further the cost of manufacturing the tool can be reduced.

[0022] In the tilt checking tool of the fourth invention, when the tool is fixed to the attachment, the second detection unit is more easily visible from the cockpit than the first detection unit. Therefore, for example, when the operator checks the tilt of the attachment in the first horizontal direction and corrects the attachment's attitude relative to the first horizontal direction to an appropriate state, and then repeats the work with the attachment tilted to the second horizontal direction in a desired state, i.e., when the operator spends a long time working while checking the attachment's attitude relative to the second horizontal direction, the operator can easily operate the tool and the work efficiency can be improved.

[0023] In the inclination checking tool of the fifth invention, when the tool is attached to an attachment, the third rotating body rotates relative to the tool body so that the third weight is always located directly below the rotation axis of the third rotating body when the attachment is tilted up and down relative to the second horizontal direction perpendicular to the first horizontal direction. The first reference body is rotated to set the first reference mark to be aligned side by side with the third mark of the third rotating body, and the attachment is operated so that the alignment position of the third mark relative to the first reference mark is maintained, thereby making it possible to operate the attachment while maintaining a desired inclination in the second horizontal direction. In this way, not only the inclination of the attachment relative to the first horizontal direction but also the inclination relative to the second horizontal direction can be checked with a mechanism simpler than that of the third invention, and the cost of the tool can be further reduced by reducing the number of parts constituting the tool and the manufacturing man-hours.

[0024] In the tilt checking tool of the sixth invention, when adjusting the tilt state of the attachment, the attitude of the attachment is changed while looking at two locations far away from the first rotation axis center, that is, the position of one end of the first mark corresponding to one first reference mark and the position of the other end of the first mark corresponding to the other first reference mark. Therefore, the rotation state of the first rotating body can be easily seen from the cockpit, making it even easier for the pilot to change the tilt of the attachment. [Brief description of the drawings]

[0025] [Figure 1] FIG. 1 is a perspective view showing a state in which a slope confirmation tool according to a first embodiment of the present invention is attached to a bucket of a hydraulic excavator and a slope formation operation is being performed. [Diagram 2] FIG. 1 is a perspective view of a tilt checking tool according to a first embodiment of the present invention. [Diagram 3] FIG. 2 is a front view of the inclination checking tool according to the first embodiment of the present invention. [Figure 4] FIG. 4 is a view taken along the arrow IV in FIG. [Diagram 5] FIG. 4 is a cross-sectional view taken along line VV in FIG. [Figure 6] 6 is a cross-sectional view taken along line VI-VI in FIG. 5. [Figure 7] FIG. 7 is a cross-sectional view taken along line VII-VII in FIG. [Figure 8] FIG. 5 is a view equivalent to FIG. 3 of the second embodiment. [Figure 9] 9 is a cross-sectional view taken along line IX-IX in FIG. 8. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0026] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, in which: It should be noted that the following description of the preferred embodiments is merely exemplary in nature. EXAMPLES

[0027] 1 shows a state in which a hydraulic excavator 10 (construction machine) is performing work of forming a slope S on the side of a road R using a tilt confirmation tool 1 according to a first embodiment of the present invention. The hydraulic excavator 10 includes a crawler-type lower carrier 11 and an shovel body 12 attached above the lower carrier 11 via a turning mechanism, and the shovel body 12 is turnable around a turning axis extending in the vertical direction.

[0028] A box-shaped cab 13 is provided on one widthwise side of the shovel body 12, into which the operator of the hydraulic shovel 10 gets in to operate the hydraulic shovel 10.

[0029] On the other hand, an excavation attachment 14 is provided on the other widthwise side of the shovel body 12, and this excavation attachment 14 includes a boom 15, an arm 16, and a bucket 17 in this order from the base end side.

[0030] The above-mentioned inclination confirmation tool 1 is attached to the periphery of the opening of the bucket 17. As shown in Figures 2 to 5, this inclination confirmation tool 1 has a tool body 2 that is formed by combining elongated band-like frame members and has a substantially inverted T shape when viewed from the front.

[0031] The tool body 2 comprises a first frame 2a having a rectangular frame shape extending vertically, and a pair of second frames 2b protruding in opposite directions from both sides of the lower end of the first frame 2a, and insertion holes 2c are provided horizontally opposite each other in the upper half of each of the vertically extending frame portions of the first frame 2a.

[0032] A disk-shaped magnet member 3 (detachable portion) is attached to the lower surface of each second frame 2b, and each magnet member 3 enables the tool body 2 to be attached to and detached from a predetermined position of the excavation attachment .

[0033] A first detection unit 4 capable of detecting the upward and downward tilt with respect to a first horizontal direction H1 extending in the width direction of the first frame 2a is attached to the lower half of the first frame 2a of the tool body 2, while a second detection unit 5 capable of detecting the upward and downward tilt with respect to the opening direction of the first frame 2a, i.e., a second horizontal direction H2 perpendicular to the first horizontal direction H1, is attached to the upper half of the first frame 2a of the tool body 2.

[0034] In other words, the second detection unit 5 is attached to the tool body 2 so as to be located above the first detection unit 4.

[0035] As shown in FIG. 6, the first detection unit 4 is attached to an L-shaped frame 2d that is fixed so as to extend forward from one of the vertically extending frame portions of the first frame 2a.

[0036] The first detection unit 4 comprises a first bolt B1 extending along the second horizontal direction H2 so that the head side is positioned away from the first frame 2a, and a first rotating body 6 and a first reference body 7 which are approximately regular dodecagons of different sizes with the same central axis, and the outer shape of the first reference body 7 is designed to be larger than the outer shape of the first rotating body 6.

[0037] As shown in Figures 2 to 6, the first rotating body 6 has a shallow, approximately tray-like shape and is provided with a small-diameter plate-shaped portion 61 having a substantially regular dodecagonal plate shape and a small-diameter side portion 62 that extends in an annular shape and is provided continuously with the outer peripheral edge of this small-diameter plate-shaped portion 61.

[0038] A through hole 61a into which the first bolt B1 can be loosely fitted is formed at the center of the small diameter plate-shaped portion 61. The first rotating body 6 is attached by using a first washer W1 and a first nut N1 at a position close to the head of the first bolt B1 loosely fitted in the through hole 61a, and is rotatable about a first rotation axis C1.

[0039] 2, a first mark 61b is provided on the front surface of the small diameter plate portion 61, extending linearly so as to pass through the center of the small diameter plate portion 61, and the first mark 61b has a shape in which each end reaches the edge of the small diameter plate portion 61. In other words, the first mark 61b is provided at a predetermined position on the outer circumferential edge of the first rotor 6.

[0040] A weight nut 61c (first weight) is fixed to a position close to the small diameter side portion 62 on the back side of the small diameter plate portion 61, that is, a predetermined position near the outer circumferential edge portion of the first rotating body 6. This weight nut 61c is disposed on a straight line perpendicular to both the first mark 61b and the first rotation axis C1, and is configured such that when the first rotating body 6 is rotated to position the weight nut 61c directly below the first rotation axis C1, the first rotating body 6 is in a state in which the first mark 61b extends linearly in the horizontal direction.

[0041] The first reference body 7 has an approximately tray-like shape with a shallow bottom, and is provided with a large-diameter plate-shaped portion 71 having an approximately regular dodecagonal plate shape, and a large-diameter side portion 72 that extends in an annular shape and is provided continuously with the outer peripheral edge of this large-diameter plate-shaped portion 71.

[0042] A through hole 71a through which the first bolt B1 can be inserted is formed at the center of the large diameter plate-like portion 71. The first reference body 7 is attached to the first bolt B1 by using a first washer W1 and a first nut N1 at a midpoint of the first bolt B1 inserted into the through hole 71a. The first reference body 7 is attached to the first bolt B1 so that the first rubber pad G1 is interposed between the first washer W1 and the first reference body 7, so that the rotational position can be adjusted when the first reference body 7 is rotated around the first rotation axis C1.

[0043] 2 and 3, a pair of first reference marks 71b each having a substantially rectangular shape in a front view are formed symmetrically across the first rotation axis C1 on the outer circumferential edge of the surface of the large diameter plate-like portion 71. In other words, the first reference marks 71b are provided at predetermined positions on the outer circumferential edge of the first reference body 7.

[0044] As shown in FIGS. 2 to 5, the second detection unit 5 includes a second rotating body 8 and a second reference body 9 that are substantially the same shape and size and have the same central axis.

[0045] As shown in Figure 7, the second rotating body 8 has a roughly tray-like shape with a deep bottom, and is equipped with a circular plate portion 81 having a support hole 81a formed in the center into which the second bolt B2 can be loosely fitted, and a ring-shaped side wall portion 82 that is continuous with the outer peripheral edge of the circular plate portion 81.

[0046] The second rotating body 8 is attached to the first frame 2a by positioning its opening portion facing one of the frame portions extending vertically in the first frame 2a, and by screwing a second nut N2 onto a second bolt B2 that is loosely fitted into the support hole 81a of the disc portion 81 and the other insertion hole 2c of the first frame 2a with a second washer W2 interposed therebetween.

[0047] 2 and 3, a second mark 82a is provided on the outer circumferential surface of the side wall portion 82 of the second rotating body 8 at a predetermined position on the outer circumferential surface of the side wall portion 82, extending linearly along the central axis of the second rotating body 8, and this second mark 82a has a shape in which each end reaches the edge of the side wall portion 82. In other words, the second mark 82a is provided at a predetermined position on the outer circumferential edge of the second rotating body 8.

[0048] A weight nut 81b (second weight) is fixed to a position close to the side wall portion 82 on the back side of the disc portion 81, i.e., a predetermined position near the outer peripheral edge of the second rotating body 8, and this weight nut 81b is positioned 1 / 4 of a revolution clockwise from the position of the second mark 82a.

[0049] The second reference body 9 has a deep bottom and is roughly tray-shaped, having approximately the same shape as the second rotating body 8, and is equipped with a circular plate portion 91 having a support hole 91a at its center into which the second bolt B2 can be loosely fitted, and a ring-shaped side wall portion 92 that is continuous with the outer peripheral edge of the circular plate portion 91.

[0050] The second reference body 9 is attached to the first frame 2a by screwing a second nut N2 onto a second bolt B2 that is loosely fitted into the support hole 91a of the disc portion 91 of the second reference body 9 and one of the insertion holes 2c of the first frame 2a with a second washer W2 interposed therebetween, with the opening portion facing the other frame portion extending vertically in the first frame 2a, and the second reference body 9 is disposed symmetrically with the second rotating body 8 so that its opening portions face each other on the second rotation axis C2.

[0051] The second reference body 9 and the first frame 2a are in close contact with each other through the second rubber pad G2 interposed between them and the second washer W2, so that when they are rotated around the second rotation axis C2, they can be adjusted to a predetermined rotation position.

[0052] 2 and 3, a second reference mark 92a is provided on the outer circumferential surface of the side wall portion 92, extending linearly across the entire width of the side wall portion 92. In other words, the second reference mark 92a is provided at a predetermined position on the outer circumferential edge of the second reference body 9.

[0053] Next, a detailed description will be given of an operation of forming a slope S on the side of a road R with a hydraulic excavator 10 using the inclination checking tool 1 of the present invention.

[0054] First, the operator of the hydraulic excavator 10 aligns the traveling direction of the lower traveling structure 11 of the hydraulic excavator 10 along the extension direction of the road R, as shown in FIG.

[0055] Next, the shovel body 12 is rotated 90 degrees relative to the lower traveling body 11 so that the bucket 17 is in a position where it can be tilted up and down with respect to the horizontal direction perpendicular to the road R.

[0056] Next, the operator attaches the tilt confirmation tool 1 to the periphery of the opening of the bucket 17. At this time, the tilt confirmation tool 1 is attached to the bucket 17 so that the second rotation axis C2 extends parallel to the rotation axis of the bucket 17 relative to the arm 16.

[0057] Thereafter, the operator changes the inclination of the bucket 17 to correspond to the slope S to be formed, and then rotates the first reference body 7 around the first rotation axis C1 to set it so that the first reference mark 71b is aligned horizontally with the first mark 61b.

[0058] At this time, the operator visually checks the first detection unit 4 of the tilt confirmation tool 1 from the cockpit, and adjusts the posture of the bucket 17 so that each end of the first mark 61b is aligned horizontally with each of the first reference marks 71b of the first reference body 7 to determine whether or not the bucket 17 is tilted in the second horizontal direction H2.

[0059] Specifically, when the tilt checking tool 1 is attached to the bucket 17, the first rotor 6 rotates relative to the tool body 2 so that the weight nut 61c is always located directly below the first rotation axis C1 of the first rotor 6 when the tilt of the bucket 17 is changed up and down relative to the first horizontal direction H1. Then, the first reference body 7 is rotated to set the first reference mark 71b to be aligned horizontally with the first mark 61b of the first rotor 6, and then the bucket 17 is operated so that the horizontal alignment of the first mark 61b with respect to the first reference mark 71b is maintained, whereby the bucket 17 operates in a state where the desired tilt is maintained in the first horizontal direction H1. In this way, the tilt of the bucket 17 with respect to the first horizontal direction H1 can be checked with a simple mechanism.

[0060] Thereafter, the operator operates the bucket 17 to move it diagonally upward while maintaining the bucket 17 in a predetermined attitude, and cuts out the ground with the bucket 17. At this time, the operator performs the operation while visually checking the second detection unit 5 of the tilt confirmation tool 1 in the cockpit to see whether the bucket 17 is being maintained at the desired tilt in the second horizontal direction H2 while the cutting out operation is being performed.

[0061] Specifically, when the bucket 17 changes its inclination up and down with respect to the second horizontal direction H2, the second rotor 8 rotates with respect to the tool body 2 so that the weight nut 81b is always located directly below the second rotation axis C2 of the second rotor 8. Then, the second reference body 9 is rotated and set so that the second reference mark 92a is aligned with the second mark 82a of the second rotor 8, and then the bucket 17 is operated so that the aligned position of the second mark 82a with respect to the second reference mark 92a is maintained, whereby the bucket 17 operates with a desired inclination maintained in the second horizontal direction H2. In this way, not only the inclination of the bucket 17 with respect to the first horizontal direction H1 but also the inclination with respect to the second horizontal direction H2 can be checked with a simple mechanism.

[0062] After moving the bucket 17 diagonally upward to cut out the ground at a predetermined angle to form the inclined surface X1, the operator then moves the hydraulic excavator 10 by its lower running body 11 a predetermined distance in the direction of travel of the road R until part of the bucket 17 overlaps the inclined surface X1.

[0063] Thereafter, at that position, the bucket 17 is moved obliquely upward to cut out the ground at a predetermined angle, thereby forming the inclined surface X2. In this manner, by repeating the work of cutting out the ground with the bucket 17 while gradually moving the hydraulic excavator 10 along the road R, a slope S having a desired gradient along the road R is formed.

[0064] As described above, according to the first embodiment of the present invention, the operator of the hydraulic excavator 10 can check the up and down inclination of the bucket 17 in two orthogonal horizontal directions (first horizontal direction H1 and second horizontal direction H2) by looking at the inclination checking tool 1 attached to the bucket 17. Therefore, the operator of the hydraulic excavator 10 can operate the bucket 17 while checking the inclination of the bucket 17 in two directions without getting on or off the operator's seat, and can accurately and efficiently form ground, slopes, and the like over a wide area using the hydraulic excavator 10.

[0065] In addition, the inclination of the bucket 17 relative to the first horizontal direction H1 can be determined by utilizing the rotational movement of the first rotating body 6 caused by the weight of the weight nut 61c attached to the rotatable first rotating body 6 lowering under its own weight, so that the inclination of the bucket 17 relative to the first horizontal direction H1 can be confirmed with a simple mechanism and a low-cost inclination confirmation tool 1 can be produced.

[0066] In addition, the inclination of bucket 17 with respect to the second horizontal direction H2 can be determined by utilizing the rotational movement of second rotor 8 caused by the weight of weight nut 81b attached to second rotor 8 lowering under its own weight. This makes it possible to check not only the inclination of bucket 17 with respect to first horizontal direction H1 but also the inclination with respect to second horizontal direction H2 with a simple mechanism. Therefore, even if the posture required for bucket 17 with respect to the horizontal plane is complex, work can be performed while checking the inclination in two directions with both first detection unit 4 and second detection unit 5.

[0067] Furthermore, when the tilt confirmation tool 1 is attached to the periphery of the opening of the bucket 17, the second detection unit 5 is located higher than the first detection unit 4, and therefore the second detection unit 5 is easier to see from the operator's seat than the first detection unit 4. Therefore, when the operator checks the tilt of the bucket 17 in the first horizontal direction H1 and corrects the attitude of the bucket 17 in the first horizontal direction H1 to an appropriate state, and then repeats work with the tilt of the bucket 17 in the second horizontal direction H2 in the desired state, i.e., when work is performed for a long time while checking the attitude of the bucket 17 in the second horizontal direction H2, it becomes easier for the operator to steer and work efficiency can be improved.

[0068] In addition, for the first rotating body 6 and the first reference body 7 whose central axes coincide with the first rotation axis C1, the outer shape of the first reference body 7 is designed to be larger than that of the first rotating body 6, the first reference marks 71b are formed as a pair symmetrically on either side of the first rotation axis C1, and the first marks 61b extend in a straight line passing through the first rotation axis C1 with each end reaching the edge of the first rotating body 6. Therefore, when adjusting the inclination state of the bucket 17, the attitude of the bucket 17 is changed while looking at two places far away from the first rotation axis C1, that is, the position of one end of the first mark 61b corresponding to one first reference mark 71b and the position of the other end of the first mark 61b corresponding to the other first reference mark 71b. Therefore, the rotation state of the first rotating body 6 can be easily seen from the position of the cockpit, making it even easier for the operator to change the inclination of the bucket 17. EXAMPLES

[0069] 8 and 9 show an inclination confirmation tool 1 according to a second embodiment of the present invention. In this second embodiment, the attachment position of the first detection unit 4 relative to the tool body 2 and a partial structure of the second detection unit 5 are different from those in the first embodiment, so the same parts as those in the first embodiment are denoted by the same reference numerals, and only the other different parts will be described.

[0070] The first detection unit 4 of the second embodiment is disposed on one side of a frame portion that extends vertically in the upper half of the first frame 2a of the tool body 2.

[0071] Moreover, the second detection unit 5 of the second embodiment is not provided with the second reference body 9 as in the first embodiment, and a third mark 82b is provided on the side wall 82 of the second rotating body 8 of the second embodiment. This third mark 82b extends linearly in the horizontal direction and has a shape in which each end reaches the edge of the side wall 82. For convenience, the second rotating body 8 of the second embodiment is referred to as the third rotating body 8A, and the weight nut 81b is referred to as the weight nut 81A (third weight).

[0072] The first detection unit 4 is disposed to the side of the second detection unit 5, and the first reference mark 71b is disposed outside the outer periphery of the third rotating body 8A.

[0073] As described above, according to the second embodiment of the present invention, when the tilt checking tool 1 is attached to the bucket 17, the third rotor 8A rotates relative to the tool body 2 so that the weight nut 81A is always located directly below the second rotation axis C2 of the third rotor 8A when the bucket 17 is tilted up and down relative to the second horizontal direction H2 perpendicular to the first horizontal direction H1. Then, by rotating the first reference body 7 to set the first reference mark 71b to be aligned horizontally with the third mark 82b of the third rotor 8A, and operating the bucket 17 to maintain the horizontal alignment of the third mark 82b relative to the first reference mark 71b, the bucket 17 can be operated while maintaining a desired tilt in the second horizontal direction H2. In this way, it is possible to check not only the inclination of the bucket 17 with respect to the first horizontal direction H1 but also the inclination with respect to the second horizontal direction H2 with a mechanism that is even simpler than the mechanism of Example 1, and the cost of the inclination confirmation tool 1 can be further reduced by reducing the number of parts that make up the inclination confirmation tool 1 and the manufacturing labor required.

[0074] In addition, in the second embodiment of the present invention, the L-shaped frame 2d may be structured to be slidable up and down relative to the frame portion extending up and down of the first frame 2a, so that the positions of both first reference marks 71b can be changed up and down simultaneously.

[0075] In the first and second embodiments of the present invention, the inclination confirmation tool 1 is attached to the bucket 17 of the hydraulic excavator 10 for use, but the present invention is not limited to this. For example, the tool may be attached to the blade of the front side of the lower travelling body 11 of the hydraulic excavator 10 when leveling the ground with the blade. The tool may also be used when working while checking the inclination of the attachment in other construction machines, not limited to the hydraulic excavator 10. The tool may also be attached to a culvert creation tool for forming a culvert for use. In this way, the distance from the ground of the bullet member moving underground during culvert creation becomes stable, improving the quality of the culvert to be created. In other words, by using the inclination confirmation tool 1 of the present invention, the movement of the bullet member underground becomes pseudo-visible on the ground, that is, the bullet member is "visualized" on the ground, which contributes to improving the quality of the culvert to be created.

[0076] In the first and second embodiments of the present invention, the first rotating body 6 and the first reference body 7 have a substantially regular dodecagonal shape, but the shape is not limited to this and may be another polygonal shape or a circular shape.

[0077] In the first and second embodiments of the present invention, the tool body 2 can be attached to the attachment of the construction machine by the pair of magnet members 3, but the present invention is not limited to this and the tool body 2 may be attached to the bucket 17 by other methods. For example, the tool body 2 may be configured to sandwich the peripheral edge of the opening of the bucket 17.

[0078] In the first and second embodiments of the present invention, a pair of first reference marks 71b are provided around the first rotation axis C1, but this is not limiting and a pair of first reference marks 71b may be provided on only one of them. [Industrial Applicability]

[0079] The present invention is suitable for an inclination confirmation tool for construction machinery that enables an operator to visually confirm the inclination state of an attachment of a construction machine when operating the attachment to perform construction work. [Explanation of symbols]

[0080] 1...Tilt confirmation tool 2...Tool body 2a...First frame 2b...Second frame 2c...Insertion hole 2d...L-shaped frame 3...Magnetic member (detachable portion) 4...First detection unit 5...Second detection unit 6...First rotating body 7...First reference body 8...Second rotating body 8A...Third rotating body 9...Second reference body 10...Hydraulic excavator (construction machine) 11...Lower running body 12...Excavator body 13...Cab 14...Excavation attachment 15...Boom 16...Arm 17...Bucket 61...Small diameter plate-shaped portion 61a...Through hole 61b...First mark 61c...Sinker nut (first sinker) 62...Small diameter side portion 71...Large diameter plate-shaped portion 71a...Through hole 71b...First reference mark 72...Large diameter side portion 81...Disc portion 81A... Nut for weight (third weight) 81a... Axle support hole 81b... Nut for weight (second weight) 82... Side wall portion 82a... Second mark 82b... Third mark 91... Disk portion 91a... Axle support hole 92... Side wall portion 92a... Second reference mark B1... First bolt B2... Second bolt C1... First rotation axis C2... Second rotation axis G1... First rubber pad G2... Second rubber pad H1... First horizontal direction H2... Second horizontal direction N1... First nut N2... Second nut R... Road S... Slope W1... First washer W2... Second washer X1... Inclined surface X2... Inclined surface

Claims

1. A tilt confirmation tool capable of confirming the tilt state of an attachment of a construction machine, A tool body having a detachable part that is detachable from the attachment; a first detection unit attached to the tool body and capable of detecting an up-down inclination with respect to a predetermined first horizontal direction; A tilt confirmation tool comprising: a second detection unit attached to the tool body and capable of detecting an up-down tilt with respect to a second horizontal direction perpendicular to the first horizontal direction.

2. 2. The inclination confirmation tool according to claim 1, The tilt confirmation tool is characterized in that the first detection unit comprises a first rotating body that is freely rotatable around a first rotation axis extending in the second horizontal direction and has a first mark at a predetermined position on its outer circumferential edge, a first weight fixed at a predetermined position near the outer circumferential edge of the first rotating body, and a first reference body that is rotatable around the first rotation axis and has a first reference mark at a predetermined position on its outer circumferential edge.

3. 3. The inclination confirmation tool according to claim 2, The tilt confirmation tool is characterized in that the second detection unit comprises a second rotating body configured to be freely rotatable around a second rotation axis extending in the first horizontal direction and having a second mark at a predetermined position on its outer circumferential edge, a second weight fixed at a predetermined position near the outer circumferential edge of the second rotating body, and a second reference body configured to be rotatable around the second rotation axis and having a second reference mark at a predetermined position on its outer circumferential edge.

4. 4. The inclination confirmation tool according to claim 1, The tilt checking tool, wherein the second detection unit is attached to the tool body so as to be positioned above the first detection unit.

5. 3. The inclination confirmation tool according to claim 2, the second detection unit is configured to be rotatable about a second rotation axis extending in the first horizontal direction, and includes a third rotating body having a third mark provided at a predetermined position on an outer circumferential edge portion, and a third weight body fixed at a predetermined position near the outer circumferential edge portion of the third rotating body, A tilt confirmation tool characterized in that the first detection unit is arranged to the side of the second detection unit, and the first reference mark is positioned outside the outer circumferential edge of the third rotating body.

6. The inclination confirmation tool according to claim 2 or 5, The first reference body has a circular or regular polygonal shape whose central axis coincides with the first rotation axis, and its outer shape is designed to be larger than the outer shape of the first rotating body, The first reference mark is formed as a pair symmetrically with respect to the first rotation axis, A tilt confirmation tool characterized in that the first mark extends in a straight line passing through the first rotation axis and has a shape such that each end reaches an edge of the first rotating body.

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