JP2007247208A - Work machine for excavating wide rectangular continuous hole - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a work machine for excavating a wide rectangular continuous hole which can excavate the wide rectangular continuous hole having a several-folded width at a stroke. <P>SOLUTION: In the work machine for a wide rectangular continuous hole, a plurality of excavating rods which vertically movably support a rotation driving device on a support members erected on the ground are arranged so that a plurality of rows of the excavating rods standing in parallel with one another are placed in a longitudinal direction. The excavating rods are connected to the rotation driving device in a manner capable of transmitting rotation thereof, and hung from the device. Then each excavating rod mounts thereon a single or a plurality of rectangular hole excavators based on a Reuleaux mechanism which encloses the periphery of the rod and radially protrudes a triangular cutter. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a plurality of excavation work rods such as excavation rods, excavation agitation rods, excavation screw rods, etc. used for excavation creation or ground improvement of underground continuous walls such as water blocking walls and retaining walls, and other various applications. Further, the present invention relates to an improvement of a multi-axis rectangular continuous hole excavating work machine to which a rectangular hole excavating apparatus with a triangular cutter of a roulau mechanism is attached.

  Conventionally, for excavation of underground continuous walls such as water blocking walls, three excavation agitation rods having a normal excavation head at the lower end are provided on the output shaft of a rotary drive device supported by a mast so as to be movable up and down. A three-axis circular continuous hole excavating stirrer that is connected and suspended in a row in parallel is widely used.

  However, in the excavation construction of the underground continuous wall by the conventional machine, cement milk is injected to form a continuous column of soil cement cylinders while excavating with three circular vertical holes wrapped partially adjacent to each other. As a result, a constriction over the entire length of the cylinder is formed in the contact circle between adjacent soil cement cylinders, which is not only a disadvantage that impairs the water stoppage of the underground continuous wall, but also in the underground continuous wall. When building a core material such as H-shaped steel, there is a difficulty in receiving a restriction in construction in which each core material must be built at the position of the circular vertical hole.

  In order to improve this, the present inventors previously suspended a plurality of excavation work rods connected in parallel in a line in the left-right direction to a rotary drive device supported by the mast so as to be movable up and down. In addition, a rectangular continuous hole drilling machine is proposed in which each of the drilling work rods is attached with a rectangular hole drilling device based on a roulau mechanism that projects a triangular cutter radially, and according to this, a triangular cutter for each drilling work rod is proposed. By excavating a rectangular vertical hole by partially wrapping with the above, it has become possible to excavate a rectangular continuous hole without any cracks (pending, Japanese Patent Application No. 2005-260508).

  The first invention of the present application further improves the rectangular continuous hole excavation work machine based on the previously proposed roulau mechanism, and wide rectangular continuous hole excavation work capable of excavating a rectangular continuous hole multiple times wider than that at once. It is an object to provide a machine.

  In addition to the subject of the first invention, the second invention of the present application is a wide rectangular continuous hole excavating work machine capable of maintaining the conveyance and movement of excavated earth and sand in the continuous hole during excavation and enabling the price of the apparatus to be reduced. The issue is to provide.

  The third invention of the present application provides a wide rectangular continuous hole excavation work machine capable of facilitating excavation of a rectangular vertical hole by a triangular cutter of each excavation work rod in addition to the problems of the first invention or the second invention. This is the issue.

As means for solving the above problems, the first invention of the present application is:
A rotary drive device is supported by a support member standing on the ground so as to be able to move up and down, and a plurality of excavation work rods arranged in a row in the left-right direction are arranged in a plurality of rows in the front-rear direction, and each excavation work rod is rotated as described above. Connected to the drive so that rotation can be transmitted, and hangs down.
Each of the excavation work rods is provided with one or a plurality of rectangular hole excavation devices based on a roulau mechanism that surrounds the outer periphery of the rod and projects a triangular cutter radially,
The rectangular hole drilling device is
A sun gear fixed to the outer peripheral surface of the excavation work rod;
An internal gear concentrically surrounding the sun gear, the fixed internal gear connected to the internal gear of the adjacent excavation work rod;
A gear that radially projects the triangular cutter, in meshing with the sun gear, and intermediate gear meshing with the fixed internal gear;
The dimensions of each part are determined according to the principle of the roulau mechanism, respectively.
A wide rectangular continuous drilling machine is proposed.

The second invention of the present application is
A rotary drive device is supported by a support member standing on the ground so as to be able to move up and down, and a plurality of excavation work rods arranged in a row in the left-right direction are arranged in a plurality of rows in the front-rear direction, and each excavation work rod is rotated as described above. Connected to the drive so that rotation can be transmitted, and hangs down.
Among the above excavation work rods, a plurality of rods located at either outer end in the left-right direction are provided with only a normal excavation head at the lower end of the rod, and the remaining rods surround the outer periphery of the rod. And one or a plurality of rectangular hole excavation devices based on a roulau mechanism that radially projects a triangular cutter,
The rectangular hole drilling device is
A sun gear fixed to the outer peripheral surface of the excavation work rod;
An internal gear concentrically surrounding the sun gear, the fixed internal gear connected to the internal gear of the adjacent excavation work rod;
A gear that radially projects the triangular cutter, in meshing with the sun gear, and intermediate gear meshing with the fixed internal gear;
The dimensions of each part are determined according to the principle of the roulau mechanism, respectively.
A wide rectangular continuous drilling machine is proposed.

The third invention of the present application is
A drilling head is provided at the lowermost end of each drilling work rod provided with the rectangular hole drilling device in the first invention or the second invention,
One side of the rectangular hole by the rectangular hole drilling device is longer than the drilling diameter of the drilling head,
A wide rectangular continuous drilling machine is proposed.

  According to the first invention of the present application, a plurality of excavation work rods arranged in a line in the left-right direction are further arranged in a plurality of rows in the front-rear direction, and a rectangular hole excavation device with a ruler type triangular cutter is attached to each excavation work rod. Because it is equipped, it is possible to excavate rectangular continuous holes that are several times wider than rectangular continuous holes excavated by conventional machines at once, so if this machine is used for excavation of continuous underground walls, A large solid continuous underground wall can be efficiently formed, and when used for ground improvement, a large area ground and a large amount of ground can be efficiently improved.

  According to the second invention of the present application, in addition to the effect of the first invention, a rectangular hole drilling device with a triangular cutter cannot be attached to a plurality of rods located outside of a plurality of drilling work rods. A wide space is maintained over the entire length of the vertical hole between the multiple rods and the inner wall surface of the vertical hole, and excavation soil is actively transported and moved through the space, and other excavation work rods are associated with the excavation rod. A part of the earth and sand can be attracted to the outer rod and the entire excavated earth and sand can be maintained. Further, according to the present invention, there is an advantage that an expensive rectangular hole excavator can be partially saved and the present machine can be provided at a low price.

  According to the third invention of the present application, in addition to the effects of the first invention or the second invention, in each excavation work rod, first, a circular vertical hole is excavated by a normal excavation head at the lowermost end, and then the above-mentioned by a roulau type triangular cutter. Since the rectangular vertical hole is formed by digging out from the inside of the circular vertical hole to the outside, the load applied to the triangular cutter can be reduced, and the intended rectangular vertical hole can be easily excavated.

  The “triangular cutter” in each invention of the present application means that three cutters made of wings, blades, plates, etc. that are perpendicular to the rotation direction or inclined at an appropriate angle are spaced at equal angular intervals from the center of the intermediate gear. Projecting radially. Further, when one blade of the triangular cutter is located on a straight line passing through the center of the sun gear and the center of the intermediate gear, the straight line is in parallel with one side of the square excavation hole.

FIG. 1 shows an example of a rectangular continuous hole excavator and stirrer for excavating a retaining wall. FIG. 1 is a front side view of a mast (2) vertically supported on a front end of a base machine (1). The guide rails (3) and (3) are laid on the guide rails (3) and (3), and the rotary drive device (4) is vertically slidably engaged with the guide rails (3) and (3) and suspended from the top sheave (5). An output shaft that is suspended up and down by a hoisting wire rope (6) and that transmits rotation from a motor built in the rotation drive device (4) via a speed reducer, that is, 1 in the left-right direction in this example. A total of six output shafts (7)... In which three output shafts (7)... Arranged in parallel in the row are arranged in two rows in the front-rear direction protrude from the lower surface of the drive device (4), and these output shafts (7). , Excavating and stirring drill equipped with a rectangular hole drilling device with a triangular cutter based on the roulau mechanism The de (8) ..., in a mutually parallel state, is connected respectively in each rod upper end.

  The excavation agitation rod (8) is provided with a rectangular hole excavator (9) having a triangular excavation head (10) at the lower end of each rod, and a triangular cutter (12), (12) above it. ,... Are successively provided with appropriate vertical intervals, and further, these rectangular hole excavators (9), (11), (11) are provided. ,... Are respectively provided on the outer peripheral surface of the rod between.

  First, the one set of rectangular hole excavator (11) will be described in detail. As for the leftmost device (11) in FIGS. 2, 3, 4, and 5, a cylindrical casing (14) having a lower end opening having a boss (15) at the center of the upper end surface is connected to the excavation stirring rod at the boss (15). Concentrically with respect to (8), it is rotatably fitted via bearings (16) and (16), and in this casing (14), a sun gear (17) is placed on the outer peripheral surface of the rod (8). The internal gear (18) is formed concentrically with the sun gear (17) on the inner peripheral surface of the cylindrical casing (14), and the casing (14) Similarly, the casings (14) and (14), which are rotatably fitted to the rods (8) and (8), are connected to the flange joints of the arms (21) and (21) as shown in FIGS. Thereby fixing the internal gear (18 Is a fixed internal gear, and a cylindrical body (20) having a diameter larger than that of the rod (8) and smaller than that of the casing (14) is prepared. An annular intermediate gear (19) is formed with the external teeth formed on the outer peripheral surface, and the annular intermediate gear (19) is engaged with the sun gear (17) in an inscribed state by the internal teeth. The outer teeth mesh with the fixed internal gear (18) in the circumscribed state.

  In order to maintain the meshing state of the intermediate gear (19), as shown in FIGS. 5 and 3, particularly between the inner peripheral surface of the upper and lower ends of the cylindrical body (20) and the outer peripheral surface of the rod (8), Eccentric guide plates (22), (23) having shaft holes (24), (25) at appropriate eccentric positions from the center thereof, and the shaft holes (24), (25) to the rod ( 8), and the outer peripheral surface is engaged with the inner peripheral surface of the cylindrical body (20) so as to be freely rotatable.

  Further, as shown in FIG. 3, there is a disk between the outer peripheral surface of the intermediate portion of the cylindrical body (20) and the inner peripheral surface of the casing (14), and a shaft hole is appropriately eccentric from the center. With the eccentric guide plate (26) having (27), the shaft hole (27) is fitted into the cylindrical body (20), and the outer peripheral surface thereof is fitted to the inner peripheral surface of the casing (14), It is rotatably engaged.

  Three blades of the triangular cutter (12) project radially from the outer peripheral surface of the lower end of the cylindrical body (20) engaged and supported as described above with an angular interval of 120 degrees from each other. . In that case, one blade of the triangular cutter (12) is positioned on a line passing from the center of the cylindrical body (20) to the center of the eccentric shaft hole (25) (that is, the center of the rod (8)). Parallel to one side of the drilling hole.

In the above configuration, the dimensions of each part based on the principle of the roulau mechanism are as follows.
One side of square hole to be drilled = a
Eccentricity of the center of the cylinder (20) with respect to the center of the excavation stirring rod (8) = r (FIG. 3)
Then, r ≦ (1 / √3-0.5) a = 0.0774a,
Length of each blade of the triangular cutter (12) = 0.5a + r
Sun gear (17) diameter <0.3a
Diameter of intermediate gear (19) = 6r
Diameter of fixed internal gear (18) = 4/3 diameter of intermediate gear = 8r
If it does in this way, according to the principle of a roulau mechanism, while the triangular cutter (12) will carry out 1 rotation, it will perform 3 revolutions in a reverse direction.

  The rectangular hole excavator of the left and right outer rods (8), (8), (8), (8), (8) in the excavation stirring rods (8),..., And (8). (11), (11) and (11), (11) have exactly the same structure. The devices (11) and (11) of the intermediate rods (8) and (8) are substantially the same, but the structure of the outer devices (11), (11) and (11), (11) is the same. The symmetrical structure is rotated 180 degrees, and the triangular cutters (12) and (12) are positioned slightly below the outer rod. Further, the triangular cutters (12) of the rear row apparatus (11) are positioned in a stepped position slightly below that of the front row apparatus (11).

  Next, the rod (8)... Rectangular hole drilling device (9) provided at the lower end is substantially the same as the device (11) as shown in FIG. Instead of protruding downward from the inside of the casing (14), the lower end of the opening of the cylindrical body (20) is closed by the end plate (28), and the head rod is placed at the center of the end plate (28). (29)... Are projected, and the three-blade triangular excavation heads (10) that perform roulau rotation are projected radially on each head rod (29). The vertical positional relationship between the triangular excavation heads (10) is the same as the mutual relationship between the triangular cutters (12).

  The triangular cutters (12) and the triangular excavation heads (10) are arranged so as to slightly wrap the left and right neighbors and the front and rear neighbors from above. Further, the rotation direction of each excavation stirring rod (8) is such that the left and right outer rods (8), (8) and (8), (8) are forward rotation, the intermediate rod (8) and (8) is reverse rotation.

  A solidified liquid supply pipe for cement milk or the like vertically passed through the excavation stirring rod (8) is drawn out to the outside of the lower apparatus (9) slightly above the rod (8). (30) is extended along the device (9) to the triangular excavation head (10).

  The operation of the above example is as follows. When the excavation stirring rod (8) is rotated by starting the rotation drive device (4), the triangular excavation head (10) at the lower end of each rod (8) ... and the upper triangular cutter (12) ... (12) ... starts to revolve while rotating.

  Therefore, when the excavation is started on the ground by the triangular excavation head (10) at the lower end, as shown by the phantom line in FIG. 3, three substantially square vertical holes (P). The front and back of the continuous rectangular vertical holes are further partially overlapped with each other, excavating a wide rectangular vertical hole along with the front and rear, and with it, cement milk is injected from the supply pipe (30). The agitated earth and sand are agitated by the agitating blades (13), and the agitated earth and sand and cement milk are mixed to form a soil cement.

  Further, by rotating the next triangular cutter (12), the inside of the substantially square vertical hole (P) by the triangular excavating head (10) is corrected by excavating the same rectangular shape, and the following similarly. Stir and mix with the stirring blades (13), and then correct rectangular excavation with the next triangular cutter (12) ..., finally the three left and right square vertical holes (P). Two rows of wide rectangular continuous holes (R) are excavated, and a wide underground continuous wall made of soil cement is formed inside.

Embodiment of the Second Invention The embodiment of FIG. 7 is different from the embodiment of FIGS. 1 and 6 except for the rectangular hole drilling device (9)... And the triangular drilling head (10). (31a) is connected, a normal excavation head (32a) is provided at the lower end of the head rod, and the excavation stirring rods (8a) and (8a) located at the right outer end are excluded from the rectangular hole excavator. The other structures are substantially the same as those shown in FIGS.

  Note that one side of the square hole excavated by the triangular cutter (12a) is slightly longer than the excavating diameter of the excavating head (32a) in this example.

  A supply pipe for a solidified liquid such as cement milk passes vertically through the excavation stirring rod (8a), and then the head rod (31a), and a discharge port is provided at the lower end of the head rod.

  When the underground continuous wall is formed by using the wide rectangular continuous hole excavating stirrer of this example, as shown in the same figure (b) as an example, in the first excavation, the right outer excavation stirring rod (8a) , (8a) circular vertical holes (Qa), (Qa) and intermediate and left outer rods (8a) (8a), (8a) (8a) substantially square continuous vertical holes (Pa) (Pa), ( Drill a wide rectangular continuous hole (Ra) that is partially wrapped to the left and right and back and forth with Pa and Pa, and then the left outer rods (8a) and (8a) for the first time in the second excavation. In the right outer circular vertical hole (Qa), (Qa), the wide continuous hole (Ra) is excavated by duplication, and the left outer rod (8a), (8a) is similarly excavated in the third excavation. Is used to excavate a wide continuous hole (Ra) by overlappingly inserting it into the second round outer circular hole (Qa), (Qa).

  According to the above method, in the second and third excavations, the rod (8a) having the triangular cutter (12a) is repeatedly inserted into the previous circular vertical hole (Qa), and the triangular cutter (12a) substantially Since the excavation is performed in the square vertical hole (Pa), the rods (8a).

  In each excavation according to this example, the right outer rods (8a) and (8a) in the front and rear rows are not provided with the rectangular hole excavator (11a), and therefore the rods (8a) and (8a) and the circular vertical holes (Qa ), And (Qa), a large space is maintained between the inner wall surfaces of the drilling soil, thereby actively moving the drilling sand up and down during agitation, and the other rod (8a) ... The right outer rods (8a) and (8a) are attracted to the hook to promote the vertical movement of the excavated earth and sand as a whole.

  When a drilling screw rod having continuous spiral blades is used instead of the above-described drilling stirring rod (8a), the active upward conveyance of the drilling sediment by the screw of the right outer rod is one of the other rods of the drilling sediment of the river. The right outer rod attracts the part.

  (33a) is a ring that is rotatably fitted to the rod (8a). The left and right adjacent rings and the front and rear adjacent rings are connected by arms (34a), respectively, to maintain the rod interval. .

Embodiment of the Third Invention In the example shown in FIG. 8, the excavation stirring rod (8b)... Is cut from the excavation stirring rod (8) of FIG. (10)... Except that the head rod (31b)... Is connected to the lower end of the rod and the head rod (31b). Other structures are substantially the same as those shown in FIGS.

  In this example, one side of the substantially square vertical hole (Pb) to be excavated by the triangular cutter (12b) is equal to or larger than the excavation diameter of the excavation head (32b), but in this example, it is equal to the excavation diameter.

  According to this example, after excavating the circular vertical hole (Qb) ... by the lowermost excavating head (32b) ..., the square cutter (12b) ... is used to enlarge the substantially square hole, so the triangular cutter (12b) The load is small.

(A) It is a front view of the wide rectangular continuous hole excavation work machine by this invention 1st invention. (B) It is a side view of the same as above. It is an enlarged vertical front view of the rectangular hole excavator part in FIG. It is the III-III sectional view taken on the line of FIG. FIG. 4 is a partially omitted sectional view taken along line IV-IV in FIG. 2. FIG. 5 is a partially omitted sectional view taken along line VV in FIG. 2. It is a partial longitudinal front view of a triangular excavation head and its rectangular hole excavator part. (A) It is a partially omitted enlarged front view of the wide rectangular continuous hole excavating work machine according to the second invention of the present application. (B) It is an approximate line top view which shows the wide rectangular continuous hole excavation method. It is a partially omitted enlarged front view of a wide rectangular continuous hole excavating work machine according to the third invention of the present application.

Explanation of symbols

2 Mast 4 Rotation drive device 8, 8a, 8b Excavation stirring rod 9, 11, 11a, 11b Rectangular hole excavator 10 Triangular excavation head 12, 12a, 12b Triangular cutter 17 Sun gear 18 Fixed internal gear 19 Intermediate gear 32a 32b Drilling head

Claims (3)

A rotary drive device is supported by a support member standing on the ground so as to be able to move up and down, and a plurality of excavation work rods arranged in a row in the left-right direction are arranged in a plurality of rows in the front-rear direction, and each excavation work rod is rotated as described above. Connected to the drive so that rotation can be transmitted, and hangs down.
Each of the excavation work rods is provided with one or a plurality of rectangular hole excavation devices based on a roulau mechanism that surrounds the outer periphery of the rod and projects a triangular cutter radially,
The rectangular hole drilling device is
A sun gear fixed to the outer peripheral surface of the excavation work rod;
An internal gear concentrically surrounding the sun gear, the fixed internal gear connected to the internal gear of the adjacent excavation work rod;
A gear that radially projects the triangular cutter, in meshing with the sun gear, and intermediate gear meshing with the fixed internal gear;
The dimensions of each part are determined according to the principle of the roulau mechanism, respectively.
Wide rectangular continuous hole drilling machine. A rotary drive device is supported by a support member standing on the ground so as to be able to move up and down, and a plurality of excavation work rods arranged in a row in the left-right direction are arranged in a plurality of rows in the front-rear direction, and each excavation work rod is rotated as described above. Connected to the drive so that rotation can be transmitted, and hangs down.
Among the above excavation work rods, a plurality of rods located at either outer end in the left-right direction are provided with only a normal excavation head at the lower end of the rod, and the remaining rods surround the outer periphery of the rod. And one or a plurality of rectangular hole excavation devices based on a roulau mechanism that radially projects a triangular cutter,
The rectangular hole drilling device is
A sun gear fixed to the outer peripheral surface of the excavation work rod;
An internal gear concentrically surrounding the sun gear, the fixed internal gear connected to the internal gear of the adjacent excavation work rod;
A gear that radially projects the triangular cutter, in meshing with the sun gear, and intermediate gear meshing with the fixed internal gear;
The dimensions of each part are determined according to the principle of the roulau mechanism, respectively.
Wide rectangular continuous hole drilling machine. A drilling head is provided at the lowest end of each drilling work rod equipped with the rectangular hole drilling device,
One side of the rectangular hole by the rectangular hole drilling device is longer than the drilling diameter of the drilling head,
The wide rectangular continuous hole excavation work machine according to claim 1 or 2.

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