JP2012193538A - Rotary plate withdrawal tool and rotary plate withdrawal method for bucket - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rotary plate withdrawal tool and a rotary plate withdrawal method for a bucket that easily withdraw a rotary plate of the bucket.SOLUTION: A withdrawal tool 30 for the rotary plate coupled rotatably on a shaft center to a bottom lid of the bucket so as to open and close a sediment intake port formed in the bottom lid includes at least a pair of hooks 41, 42 at positions symmetrical about a shaft center C, a first hook part 41a of the one hook 41 which can lock the rotary plate and a second hook part 42a of the other hook 42 which can lock the rotary plate extending in mutually opposite horizontal directions.

Description

  The present invention relates to a rotating plate recovery jig for a bucket and a rotating plate recovery method.

  The earth drill method is known as one of the cast-in-place pile methods. In this earth drilling method, a casing pipe is built in the ground, the ground is excavated while rotating a bucket having a cutting edge on the bottom lid around the axis, and the bucket is pulled up when the bucket is filled with earth and sand. This is a construction method in which a pile is formed by inserting concrete after inserting a rebar cage into a drilling hole formed to a predetermined depth.

  Patent Document 1 discloses a bucket provided with a cutting blade. Specifically, a rotating plate having a cutting edge (excavating bit) is provided on the lower surface of the bottom lid of a bucket (earth drill bucket), and the rotating plate is rotatable in the circumferential direction of the bottom lid and rotated. The rotating plate is configured to open and close the earth and sand intake port of the bottom lid by movement.

JP 2000-234488 A

Here, since the bottom cover of the bucket and the rotating plate provided with the cutting blade are connected by a bolt or the like, the rotating plate falls into the excavation hole when the bolt is removed during excavation work. There is a fear.
However, when the rotating plate has fallen, it is necessary to collect the rotating plate. However, the excavation hole is often formed deep into the ground, and it is difficult to collect it. In addition, when the rotating plate cannot be recovered, the excavation hole cannot be used as a pile hole, and there is a problem that the design change is forced and the work period is excessive.

  Therefore, the present invention has been made in view of the above circumstances, and provides a rotating plate recovery jig for a bucket and a rotating plate recovery method capable of easily recovering the rotating plate of the bucket.

  In order to solve the above-described problems, the present invention provides a rotating plate that is pivotally connected to the bottom cover about an axis so as to be able to open and close the earth and sand intake port formed on the bottom cover of the bucket. A first jig portion that includes at least a pair of hooks at symmetrical positions with respect to the axis center, and that can lock the rotating plate in one hook, and the rotating plate in the other hook. The second hook portion that can be locked extends in the opposite horizontal direction.

  According to the rotating plate recovery jig of the present invention, it is possible to lock the rotating plate that has fallen into the excavation hole from the opposite direction of the symmetrical position with respect to the axial center. Therefore, the rotating plate can be easily locked and recovered with a recovery jig having a simple configuration.

  The first hook portion and the second hook portion may extend in a direction perpendicular to the radial direction of the excavation hole.

  By comprising in this way, it can be reliably latched with a pair of hook with respect to the rotation board formed in the symmetrical shape with respect to the axial center. Therefore, the rotating plate can be easily locked and recovered with a recovery jig having a simple configuration.

  Furthermore, the present invention is a method for recovering a rotating plate that is pivotally connected to the bottom lid so as to be pivotable about an axis so as to open and close the earth and sand intake port formed on the bottom lid of the bucket, A recovery jig having at least a pair of hooks in a symmetrical position with respect to the axial center is used. The recovery jig includes a first hook portion that can lock the rotating plate in one hook, and the rotation in the other hook. A second hook portion capable of locking the moving plate extends in the opposite horizontal direction, inserting the recovery jig into the excavation hole, rotating the recovery jig about the axis, and A step of locking the one hook portion and the second hook portion to the rotating plate, and a step of pulling up the collecting jig while the rotating plate is locked to the collecting jig. And

  According to the rotating plate collecting method of the present invention, the collecting plate having a pair of hooks is used, the collecting tool is brought to the bottom of the excavation hole, and the collecting plate is simply rotated about the axis. Can be locked, and the dropped rotating plate can be recovered by pulling up in this state. Therefore, it is possible to easily recover the rotating plate that has fallen into the excavation hole by a simple operation using a recovery jig having a simple configuration.

  According to the present invention, it is possible to lock the rotating plate that has fallen into the excavation hole from the opposite direction of the symmetrical position with respect to the axial center. Therefore, the rotating plate can be easily locked and recovered with a recovery jig having a simple configuration.

It is drawing of the bucket in embodiment of this invention, (a) is a schematic block diagram (side view), (b) is A arrow directional view of (a). It is drawing of the rotation board collection | recovery jig in embodiment of this invention, (a) is a perspective view, (b) is a B arrow view of (a). It is a figure (1) which shows the collection method procedure of the rotation board in embodiment of this invention. It is a figure (2) which shows the collection method procedure of the rotation board in embodiment of this invention. It is a figure (3) which shows the collection method procedure of the rotation board in embodiment of this invention. It is a perspective view which shows another aspect (1) of the rotation board collection | recovery jig in embodiment of this invention. It is a perspective view which shows another aspect (2) of the rotation board collection | recovery jig in embodiment of this invention. It is a perspective view which shows another aspect (3) of the rotation board collection | recovery jig in embodiment of this invention.

Embodiments of the present invention will be described with reference to the drawings.
Fig.1 (a) is a schematic structure side view of a bucket, FIG.1 (b) is A arrow directional view of (a). As shown in FIGS. 1 (a) and 1 (b), a bucket 10 is used when a pile is constructed by an earth drill method, and a bucket main body 11 formed in a substantially bottomed cylindrical shape, and earth and sand. A bottom lid 13 located on the excavation side, and a rotating plate 15 connected to a lower surface 13a of the bottom lid 13 via bolts 14 or the like are provided. Note that the bottom lid 13 and the rotating plate 15 are connected to each other by a bolt 14 on the axis C.

  The bucket 10 is configured to be rotatable about an axis C, excavates the earth and sand with a cutting blade 17 provided on the rotating plate 15, and passes through the earth and sand intake 19 formed in the bottom cover 13. It is comprised so that earth and sand can be introduce | transduced into 10 internal space 21. FIG. Further, when a predetermined amount of earth and sand enters the internal space 21, the earth and sand intake 19 can be closed by the rotation plate 15 turning about the axis C. That is, the rotation plate 15 has a size capable of closing the earth and sand intake port 19, and the earth and sand intake port 19 is configured to be openable and closable when the rotation plate 15 rotates about the axis C. Has been.

  When the earth and sand intake port 19 is formed at a symmetrical position around the axis C as in this embodiment, the rotating plate 15 is also formed in a symmetrical shape around the axis C. Is preferred. A cutting edge 17 is formed at a symmetrical position about the axis C of the rotating plate 15.

  In order to form an excavation hole using the bucket 10 configured as described above, first, the position of the rotating plate 15 is set and fixed so that the earth and sand intake port 19 of the bottom cover 13 is opened. In this state, the rotating shaft 12 connected to the bucket 10 is rotated about the axis C. Then, the earth and sand are excavated by the cutting blade 17, and the excavated earth and sand are guided into the internal space 21 of the bucket 10 through the earth and sand intake 19. Then, when a predetermined amount of earth and sand is accumulated in the internal space 21, the turning plate 15 is turned so that the earth and sand intake 19 is closed. In this state, the earth and sand can be carried out by pulling up the bucket 10, and an excavation hole having a predetermined depth can be formed by repeating this operation.

  Here, since the bucket body 11 and the rotating plate 15 are connected via the bolt 14, the rotating plate 15 falls from the bucket body 11 when the bolt 14 is removed during the operation of forming the excavation hole. May end up.

  Accordingly, a description will be given of the rotating plate recovery jig 30 that can pull up and recover the rotating plate 15 from the excavation hole.

  FIG. 2A is a perspective view of the rotating plate recovery jig, and FIG. 2B is a view as seen from the arrow B in FIG. As shown in FIGS. 2A and 2B, the rotating plate recovery jig 30 includes a substantially columnar main body 31 and a rotary shaft 33 that is connected to the upper portion of the main body 31 and rotates about the axis C. And a pair of hooks 41, 42 provided at the lower part of the main body 31.

  One hook 41 and the other hook 42 are formed in the same crank shape. One hook 41 (the other hook 42) includes a linear joint portion 43 joined to the main body portion 31, and a linear intermediate portion 44 extending in a direction perpendicular to one end portion of the joint portion 43. And a linear locking portion 45 extending from the end of the intermediate portion 44 in parallel to the joint portion 43 and extending in the opposite direction to the joint portion 43 via the intermediate portion 44. In the present embodiment, the locking portion 45 of one hook 41 is referred to as a first hook portion 41a, and the locking portion 45 of the other hook 42 is referred to as a second hook portion 42a.

  In the present embodiment, a pair of hooks 41, 42 are attached to the bottom surface 31 a of the main body portion 31 in a symmetrical position with respect to the axial center C, and the first hook portion 41 a of one hook 41 and the other hook The second hook portion 42a of 42 is arranged to extend in the opposite horizontal direction. Further, the first hook portion 41 a and the second hook portion 42 a are arranged so as to extend in a direction orthogonal to the radial direction of the excavation hole H.

  A method of recovering the rotating plate 15 that has fallen into the excavation hole using the rotating plate recovery jig 30 configured as described above will be described.

  First, when the rotating plate 15 is detached from the bucket 10 and falls into the excavation hole H, the bucket 10 is once lifted to the ground.

  Subsequently, as shown in FIG. 3, the rotating plate recovery jig 30 is inserted into the excavation hole H. At this time, the rotating plate 15 is placed on the bottom surface (earth and sand D) of the excavation hole H.

  Subsequently, as shown in FIG. 4, the rotating shaft 33 is rotated about the axis in a state where the pair of hooks 41 and 42 of the rotating plate collection jig 30 are lowered until they contact the earth and sand D. Then, the pair of hooks 41 and 42 also rotate together, the first hook portion 41a and the second hook portion 42a enter the gap between the rotating plate 15 and the earth and sand D, and the first hook portion 41a and the second hook portion 42a. Are locked at symmetrical positions about the axis C of the rotating plate 15 at substantially the same time.

  Then, as shown in FIG. 5, in the state where the pair of hooks 41 and 42 are locked together with the rotating plate 15, the rotating plate collecting jig 30 is pulled up together with the rotating plate 15, so that the inside of the excavation hole H is obtained. The dropped rotating plate 15 can be easily recovered.

  According to the present embodiment, by using the rotating plate recovery jig 30 provided with a pair of hooks 41 and 42, the rotation dropped into the excavation hole H from the opposite direction of the position symmetrical to the axis C The plate 15 can be locked. Therefore, the rotation plate 15 can be easily locked and recovered by the rotation plate recovery jig 30 having a simple configuration.

  Further, by arranging the first hook portion 41a and the second hook portion 42a so as to extend in a direction orthogonal to the radial direction of the excavation hole H, the rotating plate 15 can be more reliably locked. .

  Further, when the rotating plate recovery jig 30 of the present embodiment is used, the rotating plate recovery jig 30 is inserted into the excavation hole H, and the rotating plate recovery jig 30 is rotated about the axis C, so that the first hook portion 41a and the second hook portion 42a are locked to the rotating plate 15, and the rotating plate 15 is simply lifted while the rotating plate 15 is locked to the rotating plate recovery jig 30. Can be recovered. Therefore, the rotating plate 15 dropped into the excavation hole H can be easily recovered by a simple operation using the rotating plate recovery jig 30 having a simple configuration.

  The present invention is not limited to the above-described embodiment, and includes various modifications made to the above-described embodiment without departing from the spirit of the present invention. That is, the specific structure and configuration described in the embodiment are merely examples, and can be changed as appropriate.

  For example, in the present embodiment, a case where a pair of crank-shaped hooks is attached has been described, but the number and shape of hooks can be selected as appropriate. For example, as shown in FIG. 6, the locking portions 145 of the hooks 141 and 142 may be bifurcated, and the locking portions 245 of the hooks 241 and 242 are semicircular as shown in FIG. It may be.

  Further, in the present embodiment, the case where the hook locking portion extends in the horizontal direction has been described. However, for example, the locking portion is provided on the lower surface of the rotating plate by, for example, providing a first inclined portion on the locking portion. It is good also as a shape which becomes easy to enter.

  Furthermore, in this embodiment, although the case where the main-body part of a rotation board collection | recovery jig was formed in the column shape was demonstrated, as shown in FIG. 8, you may comprise a main-body part with the plate-shaped member 331. FIG.

  And in this embodiment, although the case where it arranged so that a 1st hook part and a 2nd hook part may extend in the direction orthogonal to the radial direction of an excavation hole was demonstrated, it does not necessarily need to orthogonally cross and rotate You may arrange | position so that it may face directions other than an orthogonal direction with respect to the radial direction of a drilling hole suitably according to the shape of a board.

  DESCRIPTION OF SYMBOLS 10 ... Bucket 13 ... Bottom cover 15 ... Rotating plate 19 ... Sediment taking-in port 30 ... Rotating plate collection jig (collection jig) 41 ... One hook 41a ... First hook part 42 ... Other hook 42a ... Second hook Part C ... Center of shaft H ... Drilling hole

Claims (3)

A recovery tool for a rotating plate connected to the bottom cover so as to be rotatable about an axis so as to be able to open and close the earth and sand intake formed in the bottom cover of the bucket,
Including at least a pair of hooks at symmetrical positions with respect to the axial center;
A first hook portion capable of locking the rotating plate in one hook;
A rotating plate collecting jig for a bucket, characterized in that a second hook portion capable of locking the rotating plate in the other hook extends in the opposite horizontal direction.   2. The bucket rotating plate recovery jig according to claim 1, wherein the first hook portion and the second hook portion extend in a direction orthogonal to a radial direction of the excavation hole. A method of recovering a rotating plate that is pivotally connected to the bottom cover so as to be rotatable about an axis so as to be able to open and close the earth and sand intake port formed in the bottom cover of the bucket,
Using a recovery jig equipped with at least a pair of hooks in a symmetrical position with respect to the axis center,
The recovery jig extends in a horizontal direction in which a first hook portion that can lock the rotating plate in one hook and a second hook portion that can lock the rotating plate in the other hook are opposed to each other. Exist,
Inserting the recovery jig into the excavation hole;
Rotating the recovery jig about the axis, and locking the first hook portion and the second hook portion to the rotating plate;
And a step of pulling up the recovery jig in a state where the rotation jig is engaged with the recovery jig.

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