JP2004316291A - Bucket type drilling equipment and steel pipe pile formation device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bucket type drilling device and a steel pipe pile formation device capable of securely transmitting the rotary force of the steel pipe to the bucket without requiring large scale equipment. <P>SOLUTION: The bucket type drilling device 1 is provided with a steel pipe 2 and a bucket 4. The turning force of the steel pipe 2 is transmitted to the bucket 4 through a torque transmission mechanism 5. The torque transmission mechanism 5 is provided with protrusions 21 formed in the steel pipe 2 and a piston 24 having the freedom of movement in the radial direction of the steel pipe 2 provided in the bucket 4. When the piston 24 advances, the front end of the piston 24 gets into contact with the protrusion 21 and a torque is transmitted to the turning direction from the protrusion 21 to the front end of the piston 24. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a bucket type drilling device and a steel pipe pile forming device.
[0002]
[Prior art]
In a cast-in-place pile method such as an earth drill method, there is a case where a steel pipe is excavated while embedding a steel pipe in the ground by using an excavator, and as an excavator used for such excavation, Japanese Utility Model Publication No. 7-540 (Patent Document) There is a drilling device disclosed in 1). This excavator includes a casing (steel pipe) and a bucket that moves up and down inside the casing. A cutter is attached to the tip of the casing and the bottom plate of the bucket, and transmits the rotational force of the casing to the bucket via a gripper device. Then, by rotating the casing, the ground is excavated by the rotational force of the casing and the bucket. The gripper used here is provided with a hydraulic cylinder and a grip, and the bucket is fixed to and released from the casing by operating the hydraulic cylinder.
[0003]
Japanese Utility Model Laid-Open Publication No. Hei 8-1470 (Patent Document 2) discloses a bucket that transmits the rotational force of a casing to a bucket through a movable arm with a non-slip process.
[0004]
On the other hand, there is a steel pipe pile forming device that attaches a drilling member to a lower end position inside a steel pipe, applies a rotational force to the steel pipe, rotates the drilling member together with the steel pipe, and drills the inside of the steel pipe with the drilling member.
[0005]
[Patent Document 1]
Japanese Utility Model Publication No. 7-540
[Patent Document 2]
Japanese Utility Model Laid-Open No. 8-1470
[0006]
[Problems to be solved by the invention]
However, in the excavator disclosed in Patent Document 1, a hydraulic mechanism such as a hydraulic cylinder is used to transmit the rotational force of a casing (steel pipe) to a bucket. Therefore, it takes time and effort to perform hydraulic control and the like, and the device becomes large-scale.
[0007]
In the bucket disclosed in Patent Document 2, a non-slip movable arm is used to transmit the torque of the casing to the bucket, and the torque is transmitted using frictional resistance. For this reason, idle rotation or the like occurs, and the rotational force cannot be transmitted reliably, and energy may be wasted.
[0008]
Further, in the above-described steel pipe pile forming apparatus, a method of transmitting the rotational force of the steel pipe to the excavated member is used. For this reason, the above-mentioned problem found in the bucket type drilling device also occurs in the steel pipe pile forming device.
[0009]
Therefore, an object of the present invention is to provide a bucket-type drilling device and a steel-pipe pile forming device capable of reliably transmitting the rotational force of a steel pipe to a bucket without requiring a large-scale device.
[0010]
[Means for Solving the Problems]
A bucket-type drilling device according to the present invention that has solved the above-described problem has a steel pipe provided with a cutter at a lower end, and a bucket that moves up and down inside the steel pipe, and controls the rotational force of the steel pipe that is rotated by a rotating device. In a bucket-type drilling device that transmits a torque to a bucket via a rotational force transmitting mechanism, the rotational force transmitting mechanism includes a protrusion formed on an inner surface of the steel pipe and a retractable section that can be advanced and retracted in a radial direction of the steel pipe. And a detachable member provided on the bucket, wherein the detachable member is attached to the bucket via a link mechanism that retreats when the bucket moves up and down and advances when the bucket touches the ground.
[0011]
In the bucket-type drilling device according to the present invention, a detachable member that is advanced and retracted by a link mechanism is used to transmit the rotational force of the steel pipe to the bucket. For this reason, the torque of the steel pipe can be transmitted to the bucket without requiring a large-scale device such as a hydraulic mechanism. In addition, since the rotational force of the steel pipe in which the detachable member that has advanced to the protrusion formed on the steel pipe is locked is transmitted to the bucket, slippage unlike the case of using frictional resistance does not occur. Therefore, the torque of the steel pipe can be reliably transmitted to the bucket.
[0012]
Here, the link mechanism includes a first link having one end pin-joined to the bucket, a second link having one end pin-joined to the detachable member, and one end connected to the other end of the first link and the other end of the second link. A third link joined by a pin, a rail member that guides the detachable member in the radial direction of the steel pipe, and a slider member that moves the third link in the vertical direction relative to the bucket may be provided. It is suitable.
[0013]
By using such a link mechanism, a detachable member that retreats when ascending and descending and advances when it touches the ground can be formed with a simple configuration.
[0014]
Further, it is preferable that the slider member is a heavy object that causes the detachable member to advance outward in the radial direction of the steel pipe when the bucket is in contact with the ground.
[0015]
As described above, by using a heavy object for the slider member, the slider member can be lowered by its own weight to advance the detachable member. Therefore, there is no need to separately provide a means for advancing the detachable member when the bucket comes into contact with the ground.
[0016]
Further, it is preferable that the protrusion is a long protrusion extending in the up-down direction.
[0017]
As described above, since the protruding portion is a long protruding portion extending in the up-down direction, when the bucket is lowered, the detachable member is advanced without strictly adjusting the position in the height direction with respect to the steel pipe. , Can be locked to the protrusion.
[0018]
Further, an aspect may be adopted in which the long projection is a ridge fixed to the inner surface of the steel pipe and extending in the up-down direction.
[0019]
By fixing such a ridge to the inner surface of the steel pipe, a long protrusion can be easily formed.
[0020]
It is preferable to adopt a mode in which a regulating member for regulating the upward movement of the detachable member relative to the steel pipe is provided at the upper end of the ridge.
[0021]
By providing such a restricting member, when excavation progresses and the steel pipe descends, the bucket can be surely lowered with respect to the descending of the steel pipe.
[0022]
In addition, it is also possible to adopt a mode in which the long projecting portion is a rib formed so as to protrude relatively by a groove formed by cutting a steel pipe in a vertical direction.
[0023]
Since the long projecting portion is a rib formed so as to protrude relatively by the groove formed in the steel pipe, the upper end portion of the groove performs the same function as the regulating member. The bucket can be reliably lowered together with the steel pipe.
[0024]
Furthermore, an aspect in which an urging member for urging the detachable member in the advance direction may be provided.
[0025]
By providing such an urging member, the detachable member can be reliably advanced when the bucket comes into contact with the ground.
[0026]
Further, the widening blade may be fixed to the outside of the steel pipe, and a cutter may be provided at a lower end of the widening blade.
[0027]
As described above, by using the bucket-type drilling device in which the widening wing is formed outside the steel pipe, it is possible to drill a large-diameter hole used for a cast-in-place pile in a bridge, a shaft in shield work, and the like. Even in such a case, according to the present invention, the rotating force of the steel pipe can be transmitted to the bucket without requiring a large-scale device such as a hydraulic mechanism. Further, since the slip unlike the case where the frictional resistance is used does not occur, the rotational force of the steel pipe can be reliably transmitted to the bucket.
[0028]
Further, a steel pipe pile forming apparatus according to the present invention that has solved the above-mentioned problems is a steel pipe pile forming apparatus that installs a steel pipe in the ground to form a pile body, wherein a drilling member is disposed inside the steel pipe, and the steel pipe is rotated. A rotational force transmitting mechanism for transmitting the force to the excavating member is provided.The rotational force transmitting mechanism is provided on the protrusion formed on the inner surface of the steel pipe and on the bucket so as to be able to advance and retreat along the radial direction of the steel pipe. And a detachable member provided, wherein the detachable member is attached to the excavating member via a link mechanism that retreats when the excavating member moves up and down and advances when it contacts the ground.
[0029]
In the steel pipe pile forming device according to the present invention, in order to transmit the rotational force of the steel pipe to the excavating member, a detachable member that is advanced and retracted by the link mechanism is used. Therefore, the rotating force of the steel pipe can be transmitted to the excavated member without requiring a large-scale device such as a hydraulic mechanism. Further, the tip of the detachable member that has advanced from the excavation member abuts on the protrusion formed on the steel pipe, whereby the rotational force of the steel pipe is transmitted to the excavation member in the rotation direction of the steel pipe. Therefore, slippage unlike the case of using frictional resistance does not occur, so that the rotational force of the steel pipe can be reliably transmitted to the excavated member.
[0030]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings. The same elements will be denoted by the same reference symbols, without redundant description. Also, the dimensional ratios in the drawings do not always match those described.
[0031]
1 is an overall side view of a bucket-type drilling device according to a first embodiment of the present invention, FIG. 2 is a sectional side view of a main part of the bucket-type drilling device, and FIG. 3 is a sectional view taken along line III-III of FIG. It is. As shown in FIG. 1, a bucket-type drilling device 1 according to the present embodiment includes a steel pipe 2 serving as a casing. The hole to be drilled is a hole having substantially the same diameter as the steel pipe 2. A cutter 3 is provided at the lower end of the steel pipe 2, and the cutter 3 excavates the ground to advance a hole by press-fitting while rotating the steel pipe 2. A rotary press-fitting device, for example, an all-round rotary excavator M is provided at a position where drilling is performed on the ground surface G, and presses into the ground while rotating the steel pipe 2.
[0032]
Inside the steel pipe 2, a bucket 4 suspended via a wire W with respect to a crane C serving as a suspension means is arranged so as to be able to move up and down. The bucket 4 has a cylindrical bucket body 11 as shown in FIGS. 2 and 3, and an opening / closing door 12 is provided at the bottom of the bucket body 11. The opening / closing door 12 is normally closed, and is opened by excavated soil accumulated at the bottom of the hole that has been drilled when the bucket 4 descends together with the steel pipe 2. When the door 12 is opened, excavated soil is introduced into the bucket body 11. When the lowering of the steel pipe 2 and the bucket 4 is completed, the door 12 is automatically closed by its own weight. Further, the bucket body 11 is provided with a door opening mechanism, and the opening / closing door 12 is opened by rotating the operation handle 13. A cutter 14 is provided on the lower surface of the door 12, and the bottom of the hole is excavated by the cutter 14 as the bucket 4 rotates. The bucket 4 includes a top plate 15, and the top plate 15 is attached to an upper portion of the bucket body 11 via a rod 16.
[0033]
The steel pipe 2 and the bucket 4 are provided with a torque transmitting mechanism 5 for transmitting the torque of the steel pipe 2 to the bucket 4. The rotational force transmission mechanism 5 includes a projection 21 provided on the inner surface of the steel pipe 2 and serving as a long projection of the present invention. The three ridges 21 are arranged at regular intervals of 120 ° in plan view and are fixed to the inner surface of the steel pipe 2 by welding. The upper ends of the three ridges are adjusted to the same height. On the inner surface of the steel pipe 2 at the upper ends of these ridges 21, a restricting ring 22 serving as a restricting member of the present invention is provided around the entire circumference of the steel pipe 2. It is arranged across.
[0034]
On the other hand, a cylinder 23 serving as a rail member of the present invention is fixed to the bucket 4, and a piston 24 serving as a detachable member of the present invention is slidable with respect to the cylinder 23 inside each cylinder 23. Are arranged as follows. The cylinder 23 is provided along the radial direction of the steel pipe 2, and the piston 24 is capable of moving forward and backward along the cylinder 23 along the radial direction of the steel pipe 2. Further, the piston 24 is mounted on a top plate of the bucket 4 via a link mechanism 25. The link mechanism 25 includes a first link 31, a second link 32, a third link 33, and a fourth link. One end of the first link 31 is pin-joined to the bucket 4 via a link bracket 35 provided on the top plate of the bucket 4. One end of the second link 32 is pin-joined to the piston 24 via a link bracket 36 provided at the rear end of the piston 24, and the other end is pin-joined to the other end of the first link 31. Have been. Further, one end of the third link 33 is pin-joined to a position where the first link 31 and the second link 32 are pin-joined.
[0035]
These three cylinders 23 and 24 are provided respectively, and as shown in FIG. 3, they are arranged at equal intervals at intervals of 120 ° in the circumferential direction of the steel pipe 2 in a plan view. .
[0036]
A cylindrical guide member 26 is provided at the center of the top plate of the bucket 4, and a slide rail 27 is inserted into the guide member 26. The guide member 26 is disposed along the up-down direction, and the slide rail 27 is movable in the up-down direction along the guide member 26. A slider 28 serving as a slider member of the present invention is disposed on a side surface of the slide rail 27 so as to cover the slide rail 27. The slider 28 is disposed along the slide rail 27 so as to be relatively movable with respect to the slide rail 27. An upper flange 27A is formed at the upper end of the slide rail 27, and a lower flange 27B is formed at the lower end. The relative movement of the slider 28 with respect to the slide rail 27 is suppressed by the upper and lower flanges 27A and 27B. Further, a heavy object having a certain weight is used for the slider 28, and the piston 24 advances from the cylinder 23 when the bucket 4 is placed on the ground due to the weight of the slider 28. .
[0037]
A fourth link 34 of the link mechanism 25 is fixed to the slider 28. The fourth link 34 extends in the horizontal direction, and the other end of the fourth link 34 is pin-joined to the other end of the third link 33. Further, a spring bracket 26A is provided inside the guide member 26 provided on the top plate of the bucket 4, and a spring bracket 27C is provided above the slide rail 27. A spring 29, which is an urging member of the present invention, is stretched between the spring brackets 26A and 27C. The spring 29 urges the spring brackets 26A and 27C in a pulling direction.
[0038]
Further, a stabilizer 30 extending in the radial direction of the steel pipe 2 is provided above the slide rail 27. The stabilizer 30 regulates the rotation of the bucket 4 so as to be substantially coaxial with the rotation of the steel pipe 2. At the upper end of the slide rail 27 above the stabilizer 30, a suspension bracket 27D is provided. A hook (not shown) attached to the lower end of the wire W suspended by the crane C shown in FIG. 1 is hooked on the suspension bracket 27D, and the bucket 4 is suspended by the crane C.
[0039]
The operation and operation of the bucket type drilling device 1 according to the present embodiment having the above configuration will be described. In the bucket type drilling device 1 according to the present embodiment, when no hole is formed in the ground, the steel pipe 2 is pressed into the ground while rotating the steel pipe 2 by the all-round rotary excavator M. Since the cutter 3 is provided at the lower end of the steel pipe 2, the ground is excavated by rotating and press-fitting the steel pipe 2. At the same time as the steel pipe 2 is rotated, the bucket 4 provided inside the steel pipe 2 is also rotated. When rotating the bucket 4, the rotation amount of the steel pipe 2 is transmitted to the bucket 4 via the rotational force transmission mechanism 5.
[0040]
Here, the rotational force transmission mechanism 5 includes a ridge 21 provided on the steel pipe 2 and a piston 24 attached to a link mechanism 25. When rotating the steel pipe 2, the bucket 4 is in a state of being grounded to the ground. In this state, the piston 24 is advanced by the weight of the slider 28 and the urging force of the spring 29. Also, there are three ridges 21 and three pistons 24, each of which is arranged at equal intervals 120 ° apart in the circumferential direction of the steel pipe 2 in plan view. For this reason, when the steel pipe 2 rotates, the tip of the piston 24 abuts on each of the ridges 21, and the torque is transmitted to the steel pipe 2 to the bucket 4. At this time, the force is transmitted from the ridge 21 to the tip of the piston 24 in the rotation direction, so that the torque of the steel pipe 2 can be reliably transmitted to the bucket 4. By rotating the bucket 4 in this manner, the excavated soil collected in the center of the hole is stored in the bucket 4. When the drilling proceeds and the steel pipe 2 descends, the bucket 4 tends to rise relatively to the steel pipe 2. At this time, since the regulating ring 22 is provided at the upper end of the ridge 21 in the steel pipe 2, the relative rise of the bucket 4 with respect to the steel pipe 2 is suppressed, and as a result, the bucket 4 is securely held together with the steel pipe 2. Can be lowered.
[0041]
When the bucket 4 in which the excavated soil is stored is full, the bucket 4 is lifted by the crane C. When the bucket 4 is pulled up, the suspension bracket 27D formed on the slide rail 27 provided on the upper part of the bucket 4 is pulled up. When the suspension bracket 27D is pulled up, the slide rail 27 is relatively raised with respect to the bucket 4, and the slider 28 contacts the lower flange 27B formed at the lower end of the slide rail 27. When the slider 28 comes into contact with the lower flange 27B, the slider 28 is pulled up together with the slide rail 27, and the fourth link 34 and the third link 33 of the link mechanism 25 are pulled up together with the slider 28. When the third link 33 is lifted, the first link 31 and the second link 32, which are pin-joined at one end of the third link 33, are each lifted at the pin-joined portion. As a result, as shown in FIG. 4, the piston 24 pin-joined to the first link 31 retreats along the circumferential direction of the steel pipe 2, and the bucket 4 pin-joined to the second link 32 is raised. When the piston 24 is retracted by the first link 31, the contact state between the ridge 21 provided on the steel pipe 2 and the piston 24 is released, and the bucket 4 is held without the piston 24 being caught by the regulating ring 22. Can be raised.
[0042]
Further, on the ground, the operating handle 13 provided on the bucket 4 is operated to open the opening / closing door 12, the excavated soil is discharged from the bucket body 11, and the operating handle 13 is operated to close the opening / closing door 12 again. I do. After closing the door 12, the bucket 4 is suspended by the crane C, and the bucket 4 is inserted into the steel pipe 2 and lowered. At this time, since the bucket 4 is suspended by the crane C, the piston 24 is in a state of retreating as in the case of lifting. Therefore, the bucket 4 can be lowered to the contact position of the hole without being caught by the restriction ring 22. After the bucket 4 is grounded, the tip of the piston 24 needs to be brought into contact with the ridge 21 of the steel pipe 2 again. However, since the ridge 21 has a long shape in the height direction, the bucket The bucket 4 can be arranged at a height position where the tip of the piston 24 abuts on the ridge 21 without strictly adjusting the height position of the bucket 4.
[0043]
When the bucket 4 contacts the bottom of the hole, the wire W suspended by the crane C is loosened, and the slide rail 27 descends by its own weight. When the slide rail 27 descends, the piston 24 advances outward in the radial direction of the steel pipe 2 via the link mechanism 25, and when the steel pipe 2 rotates, the tip of the piston 24 and the ridge 21 come into contact with each other. Become. In this state, the steel pipe 2 is rotated by the all-round rotary excavator M, whereby the drilling of the ground can be restarted.
[0044]
Thus, in the bucket type drilling device 1 according to the present embodiment, the piston 24 is moved forward and backward by the link mechanism 25. For this reason, the torque of the steel pipe 2 can be transmitted to the bucket 4 without using a large-scale device such as a hydraulic mechanism. In addition, since the rotational force is transmitted in the rotational direction of the steel pipe 2 from the protrusion 21 provided on the steel pipe 2 to the tip of the piston 24 provided on the bucket 4, the rotational force of the steel pipe 2 is reliably transmitted to the bucket 4. Can be transmitted to. In the bucket-type drilling device 1 according to the present embodiment, the piston 24 can be moved forward and backward by moving the bucket 4 up and down. Therefore, control for moving the piston 24 back and forth is not required, so that a simple device configuration can be achieved.
[0045]
Next, a second embodiment of the present invention will be described. The bucket type drilling device according to the present embodiment is different mainly from the first embodiment in the aspect of the elongated projection formed on the steel pipe 2.
[0046]
FIG. 5 is a side sectional view of the bucket type drilling apparatus according to the present embodiment, and FIG. 6 is a sectional view taken along line VI-VI of FIG. As shown in FIGS. 5 and 6, the bucket type drilling device 40 according to the present embodiment includes a steel pipe 41. A groove 42 is formed in the steel pipe 41 by being cut out along the longitudinal direction of the steel pipe 41, and the steel pipe 41 is provided with a rib 43 formed so as to protrude relatively by the groove 42. As shown in FIG. 5, the rib 43 extends in the longitudinal direction of the steel pipe 41, that is, in the up-down direction, and has three ribs 42 formed in a plan view. These ribs 43 are formed at equal intervals in the circumferential direction of the steel pipe 41 and at an angle of 120 °. By forming a groove 42 between the upper ends of the ribs 43 in the steel pipe 41, an upper end piece 44 relatively protruding from the groove 42 is formed. In other respects, it has the same configuration as the first embodiment.
[0047]
In the bucket type drilling device 40 according to the present embodiment having the above configuration, the rotational force of the steel pipe 41 can be transmitted to the bucket 4 by the same method as in the first embodiment. Therefore, the torque of the steel pipe 41 can be reliably transmitted to the bucket 4 without requiring a large-scale device.
[0048]
Further, a groove 42 is formed in the steel pipe 41, and the piston 24 is brought into contact with a rib 43 protruding relatively to the groove 42, so that the torque of the steel pipe 41 is transmitted to the bucket 4. For this reason, since there is no need to provide the protrusions as in the first embodiment, it is possible to use the bucket 4 having an outer diameter substantially equal to the diameter of the steel pipe 41. Therefore, the amount of excavated soil collected each time the bucket 4 is raised and lowered once can be increased accordingly. Furthermore, since the upper end piece 44 performs the same function as the regulating ring 22 in the first embodiment, there is no need to provide a separate regulating member, so that the number of members can be reduced accordingly.
[0049]
Subsequently, a third embodiment of the present invention will be described. FIG. 7 is a sectional side view of a main part of a bucket-type drilling device according to a third embodiment of the present invention. As shown in FIG. 7, a bucket type drilling device 50 according to the present embodiment includes the same steel pipe 2 and bucket 4 as in the first embodiment, and a cutter 3 is provided at a lower end of the steel pipe 2. ing. The steel pipe 2 and the bucket 4 are provided with a torque transmitting mechanism 5. A widening blade 51 is fixed to the outside of the steel pipe 2, and cutters 52, 52 are provided below the widening blade 51. Then, as the steel pipe 2 rotates, the widening blade 51 rotates. The lower surface of the widening blade 51 is tapered so that the center becomes lower, and the widening blade 51 has a substantially inverted triangular pyramid shape.
[0050]
In the bucket-type drilling device 50 according to the present embodiment having the above-described configuration, when the steel pipe 2 is rotated by the all-round rotary excavator M, the widening wing 51 fixed to the steel pipe 2 is rotated. By the rotation of the widening blade 51, a hole larger in diameter than the steel pipe 2 can be drilled by the cutter 52 provided at the lower end of the widening blade 51. Since the lower surface of the widening blade 51 is tapered such that the center becomes lower, excavated soil generated by drilling by the cutter 52 provided on the widening blade 51 is collected near the central bucket 4. The bucket 4 receives and discharges excavated soil collected by excavation by the widening wings 51 in addition to excavated soil generated by its own excavation.
[0051]
Further, in the bucket type drilling device 50 according to the present embodiment, similarly to the first embodiment, the ridge 21 is formed on the steel pipe 2, and the piston 24 is brought into contact with the ridge 21, and the steel pipe 2 is formed. Is transmitted to the bucket 4. For this reason, the torque of the steel pipe 2 can be reliably transmitted to the bucket 4 without requiring a large-scale device. Note that, in the present embodiment, instead of the ridge formed on the steel pipe, a mode in which a groove and a rib projecting relatively to the groove as in the second embodiment may be formed.
[0052]
Subsequently, a fourth embodiment of the present invention will be described. FIG. 8 is a side sectional view of a main part of a steel pipe pile forming device according to a fourth embodiment of the present invention. As shown in FIG. 8, the steel pipe pile forming device 60 according to the present embodiment includes the same steel pipe 2 as in the first embodiment, and the inside of the steel pipe 2 is a digging member according to the present invention. A wing 61 is provided. The excavating wing 61 includes, for example, a central excavating portion 62 provided at a central position of the steel pipe 2 and a plurality of wing portions 63 extending radially from the central excavating portion 62. A cutter 64 is provided in the section. The central excavation section 62 is provided with a suction port 71 of a muddy water pipe 70, and the central excavation section 62 is provided so as to protrude from an opening position of the suction port 71. The steel pipe 2 is filled with water injected from a separately provided pipe (not shown), and the excavated soil is sucked by the muddy water pipe 70.
[0053]
Further, the steel pipe 2 and the excavating wing 61 are provided with a torque transmitting mechanism 5 similar to that of the first embodiment, and the torque transmitting mechanism 5 is rotated by rotating the steel pipe 2 by an unillustrated full-rotation excavator. The torque of the steel pipe 2 is transmitted to the excavation wing 61 via the mechanism 5.
[0054]
In the steel pipe pile forming device 60 according to the present embodiment having the above-described configuration, when the steel pipe 2 is rotated by the all-round rotary excavator, the rotational force of the steel pipe 2 is transmitted to the excavation wing 61 via the rotational force transmission mechanism 5. Is done. The rotational force transmitting mechanism 5 moves the piston 24 forward and backward by a link mechanism 25 as in the first embodiment. For this reason, the torque of the steel pipe 2 can be transmitted to the excavation wing 61 without using a large-scale device such as a hydraulic mechanism. Further, since the rotational force is transmitted in the rotational direction of the steel pipe 2 from the ridge 21 provided on the steel pipe 2 to the tip of the piston 24 provided on the excavation wing 61, the rotational force of the steel pipe 2 is reliably excavated. It can be transmitted to the wing 61. Note that, in the present embodiment, instead of the ridge formed on the steel pipe, a mode in which a groove and a rib projecting relatively to the groove as in the second embodiment may be formed.
[0055]
The preferred embodiment of the present invention has been described above, but the present invention is not limited to the above embodiment. For example, in the above-described embodiment, a heavy object is used as the slider 28. However, if the piston 24 advances when the bucket 4 comes into contact with the ground by only the spring 29, a lightweight slider can be used. Conversely, if the piston 24 advances when the bucket 4 comes into contact with the ground due to the weight of the slider 28, the spring 29 may not be provided. In the above embodiment, three sets of pistons, cylinders, link mechanisms, and the like are provided. However, two or four or more sets of these may be provided. Further, in the first embodiment, the restricting ring is used as the restricting member. However, the restricting member is not a ring-shaped member. For example, a flange extending laterally is provided at the upper end of the ridge, and It can also be used as
[0056]
【The invention's effect】
INDUSTRIAL APPLICABILITY As described above, according to the present invention, it is possible to provide a bucket-type drilling device and a steel pipe pile forming device capable of reliably transmitting the rotational force of a casing to a bucket without requiring a large-scale device.
[Brief description of the drawings]
FIG. 1 is an overall side view of a bucket-type drilling device according to a first embodiment.
FIG. 2 is a side sectional view of a main part of the bucket-type drilling device according to the first embodiment.
FIG. 3 is a sectional view taken along line III-III of FIG. 2;
FIG. 4 is a side sectional view of a main part of the bucket-type drilling device with the piston retracted.
FIG. 5 is a side sectional view of a main part of a bucket-type drilling device according to a second embodiment.
FIG. 6 is a sectional view taken along line VI-VI of FIG. 5;
FIG. 7 is a side sectional view of a main part of a bucket-type drilling device according to a third embodiment.
FIG. 8 is a side sectional view of a main part of a steel pipe pile forming device according to a fourth embodiment.
[Explanation of symbols]
1,40,50 ... bucket type drilling machine
2,41 ... steel pipe
3 ... cutter
4… bucket
5. Rotational force transmission mechanism
21 ... ridge
22 ... Regulation ring
23 ... cylinder
24 ... Piston
25 Link mechanism
26 ... Guide member
26A… Spring bracket
27 ... Slide rail
27A: Upper flange
27B: Lower flange
27C: Spring bracket
27D: Bracket for suspension
28 ... Slider
29 ... Spring
31 ... First link
32 ... Second link
33 ... Third link
34 ... Fourth link
35, 36 ... Bracket for link
42 ... groove
43 ... rib
51 ... Wide wing
52 ... Cutter
60 ... Steel pipe pile forming device
61 ... Drilling wing
62 ... Central excavation part
63 ... wings
64 ... cutter

Claims (10)

In a bucket-type drilling device that has a steel pipe provided with a cutter at a lower end thereof and a bucket that moves up and down inside the steel pipe, and that transmits the torque of the steel pipe to the bucket via a torque transmission mechanism,
The rotation force transmission mechanism includes a protrusion formed on an inner surface of the steel pipe, and a detachable member provided on the bucket so as to be able to advance and retreat along a radial direction of the steel pipe,
The bucket type drilling device, wherein the detachable member is attached to the bucket via a link mechanism that retreats when the bucket moves up and down and advances when the bucket touches the ground. The link mechanism,
A first link having one end joined to the bucket by a pin,
A second link having one end joined to the detachable member by a pin,
A third link having one end joined to the other end of the first link and the other end of the second link,
A rail member for guiding the detachable member in a radial direction of the steel pipe,
A slider member for vertically moving the third link relative to the bucket;
The bucket-type drilling device according to claim 1, further comprising: The bucket-type drilling device according to claim 2, wherein the slider member is a heavy object that causes the detachable member to advance radially outward of the steel pipe when the bucket is in contact with the ground. The bucket type drilling device according to any one of claims 1 to 3, wherein the projecting portion is a long projecting portion extending in a vertical direction. The bucket-type drilling device according to claim 4, wherein the elongated protrusion is a ridge fixed to an inner surface of the steel pipe and extending in a vertical direction. The bucket-type drilling device according to claim 5, wherein a regulating member that regulates an upward movement of the detachable member relative to the steel pipe is provided at an upper end of the ridge. The bucket type drilling device according to claim 4, wherein the long projecting portion is a rib formed so as to protrude relatively by a groove formed by notching the steel pipe in a vertical direction. The bucket type drilling device according to any one of claims 1 to 7, further comprising an urging member for urging the detachable member in the advance direction. A widening wing is fixed outside the steel pipe,
The bucket type drilling device according to any one of claims 1 to 8, wherein a cutter is provided at a lower end portion of the widening blade. In a steel pipe pile forming device that forms a pile body by installing a steel pipe underground,
An excavating member is disposed inside the steel pipe, and a rotational force transmission mechanism that transmits a rotational force of the steel pipe to the excavating member is provided,
The rotation force transmission mechanism includes a protrusion formed on an inner surface of the steel pipe, and a detachable member provided on the bucket so as to be able to advance and retreat along a radial direction of the steel pipe,
The steel pipe pile forming device, wherein the detachable member is attached to the excavation member via a link mechanism that retreats when the excavation member moves up and down and advances when the excavation member contacts the ground.

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