Method of mounting a lifting device for an auger in an obstacle remover

Abstract

To provide a mounting method of a lifting device for an auger in an obstacle removing machine.SOLUTION: A coupling step of coupling the auger positioned at a predetermined height and the auger lifting and lowering device placed on the ground below the auger by a plurality of lifting devices, a lifting step of lifting the auger lifting and lowering device coupled to the auger by an operation of the lifting devices, and a joining step of joining the auger and the auger lifting and lowering device lifted by the lifting devices by a fixing structure that fits in a vertical direction; The mounting method of the lifting device for the auger in the obstacle removing machine according to claim 1.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] The present invention relates to an obstacle removal machine in which an auger, which is a rotation output device, is attached to a pile driver in order to remove obstacles buried underground, and to a method for attaching a detachable auger lifting device to the auger. [Background technology]

[0002] When rebuilding buildings due to urban redevelopment, etc., the foundations of demolished buildings become obstacles, so it is necessary to remove the concrete and other materials that remain underground. For example, a method of removing such obstacles involves rotating and pressing a casing with a carbide bit at its bottom into concrete and other materials. Specifically, the casing is rotated while being forced into the ground to crush or cut the underground obstacle, and then the casing is pulled out to remove the concrete and other obstacles. For such removal work, in addition to tubing equipment, an obstacle removal machine equipped with an auger, which is a rotation output device, is used, as described in Patent Document 1 below.

[0003] The obstacle remover has an auger, which is a rotary drive device, attached to the leader of the pile driver so that it can be raised and lowered, and the auger rotates the casing held by the chuck. When the casing is pressed in, the auger is lowered by the lifting cylinder to rotate the casing, and when the casing is pulled out, the auger, which rotates the casing in the reverse direction, is raised by the lifting cylinder. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2000-054773 Summary of the Invention [Problem to be solved by the invention]

[0005] However, obstacle removal machines equipped with augers have the problem that the lifting cylinder attached to the pile driver's leader does not have enough force to pull out the casing. For example, if the casing pressed into the ground becomes long and penetrates deep, the resistance to pulling it out increases, and the lifting cylinder may not be able to pull it out. The applicant proposes an auger lifting device to assist in pulling out the casing in such situations, but at work sites, it is desirable to be able to efficiently attach a detachable auger lifting device to the auger.

[0006] SUMMARY OF THE INVENTION In order to solve the above problems, an object of the present invention is to provide a method for attaching an auger lifting device to an obstacle remover. [Means for solving the problem]

[0007] The method for installing an auger lifting device in an obstacle removal machine according to the present invention is a method for installing an auger lifting device from below an auger, which is a rotation output device mounted on the leader of a pile driver so that it can be raised and lowered, and includes a connecting step for connecting the auger, which is located at a predetermined height, to the auger lifting device placed on the ground below it using a plurality of lifting devices; a lifting step for lifting the auger lifting device connected to the auger by operating the lifting devices; and a connecting step for joining the auger and the auger lifting device raised by the lifting devices using fixing structures that fit together in the vertical direction. [Effects of the Invention]

[0008] According to the above configuration, the auger lifting device is placed under an auger located at a predetermined height and is connected to the auger by multiple lifting devices. By operating the lifting devices and lifting the device up, the suspended auger lifting device can be positioned directly below the auger, and by further raising it, it becomes easy to connect the fixing structure that fits together in the vertical direction, making it easy to attach the auger lifting device to the auger. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 2 is a perspective view showing an obstacle remover to which an auger lifting device is attached. [Figure 2] FIG. 1 is a side view showing an obstacle remover with an auger attached. [Figure 3] FIG. 10 is a side view of the auger with the auger lifting device attached thereto. [Figure 4] FIG. 2 is a plan view of the auger with the auger lifting device attached thereto. [Figure 5] FIG. 2 is a front view of the auger lifting device, with the left half showing the thrust cylinder in a contracted state and the right half showing the thrust cylinder in an extended state. [Figure 6] FIG. 2 is a front view showing the state in which the auger lifting device is attached to the auger, with the right side showing the state in preparation for attachment and the left side showing the attached state. [Figure 7] FIG. 10 is a diagram showing the lifting device in use. DETAILED DESCRIPTION OF THE INVENTION

[0010] An embodiment of a method for installing an auger lifting device according to the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing an obstacle remover to which an auger lifting device is attached. The auger lifting device of this embodiment is attached to an auger, as needed, of an obstacle remover that normally performs work using only the auger, which is a rotation output device. FIG. 2 is a side view showing an obstacle remover with only the auger attached. First, the obstacle remover in its normal state shown in FIG. 2 will be described with reference to FIG. 1.

[0011] The obstacle remover 1 has an auger 3 attached to a leader 13 of a pile driver 2. The pile driver 2 is composed of a base machine in which an upper rotating body 12 with a driver's cab 15 is rotatably mounted on a travelable lower traveling body 11 equipped with crawlers. In the pile driver 2, the leader 13 is attached to the upper rotating body 12 that constitutes the base machine. A leader support 21 that can swing in the left-right direction of the machine body is provided at the center of the tip of the upper rotating body 12, and the leader 13 is swingably supported on the leader support 21 via a swing crank 25 so that it can swing in the front-rear direction of the machine body.

[0012] A front-rear swing cylinder 26 is connected between the swing crank 25 and the leader support 21, and a left-right swing cylinder 27 is connected to the leader support 21 and the machine body. Thus, the leader 13 can adjust its tilt in the front-rear and left-right directions relative to the machine body by extending and contracting the front-rear swing cylinder 26 and the left-right swing cylinder 27. The height of the upper end of the leader 13 is approximately the same length as the ceiling of the operator's cab 15, and parallel rail portions 23 protruding forward are formed on both the left and right sides, between which a lifting cylinder 24, which is a hydraulic cylinder, is installed to move the auger 3 up and down along the rail portions 23.

[0013] The auger 3 is a working device that rotates the gripped casing K. The auger 3 is made up of a base frame 41 and a chuck frame 42 assembled vertically, and a work table 43 surrounded by a fence is attached to the top of the chuck frame 42. Both frames have through holes 40 formed therein through which the casing K can pass. Two hydraulic motors 45 that rotate the casing K are fixed to the base frame 41, and the rotational output is transmitted to a cone, which is a cylindrical gear member that passes through the casing K.

[0014] The chuck frame 42 has wedge-shaped chucks 44 (see FIG. 4) that fit between the cone and the casing attached to a rotatable, annular rotor. The base frame 41 is provided with chuck cylinders 46 at four locations, and the chuck frame 42 is connected to the chuck cylinders 46. Therefore, as the chuck cylinders 46 extend and retract, the chuck frame 42 moves up and down relative to the base frame 41. As the chuck cylinders 46 move down, the multiple chucks 44 are tightly inserted between the casing K and the cone, forming a single unit, and the rotation of the cone rotates the casing K.

[0015] The obstacle remover 1 of this embodiment is provided with an auger lifting device 5 shown in Fig. 1 to increase the pulling force of the casing K. The auger lifting device 5 is configured to be detachably attached to the underside of the auger 3 shown in Fig. 2. Figs. 3 and 4 are a side view and a plan view of the auger lifting device 5 attached to the auger 3. Fig. 5 is a front view of the auger lifting device 5, with the left half showing the thrust cylinder in a contracted state and the right half showing the thrust cylinder in an extended state.

[0016] The auger lifting device 5 comprises a docking frame 51 and a lower frame 52 arranged one above the other and connected by four thrust jacks 53 located at the four corners. Similar to the auger 3, the docking frame 51 and the lower frame 52 are formed with through holes through which the casing K can pass. The thrust jack 53 has an inner cylindrical body 82 fixed to the lower frame 52 slidably fitted from below into a cover body 81 fixed to the docking frame 51.

[0017] The thrust jack 53 has a hydraulic cylinder 83 built in with its piston rod facing downward, and the cylinder tube is fixed to the docking frame 51 via a cover body 81, with the tip of the piston rod pivotally attached to the lower frame 52. The cover body 81 of this thrust jack 53 protrudes upward from the docking frame 51 to ensure a sufficient stroke. Therefore, the base frame 41 and chuck frame 42 of the auger 3, which are stacked vertically, are formed in shapes that avoid interference with the cover body 81. Four horizontal jacks 54 are provided on the lower frame 52 of the auger lifting device 5 near the thrust jack 53.

[0018] In the auger lifting device 5, the docking frame 51 is provided with a fixing structure for integrating with the base frame 41 of the auger 3 to stabilize the extraction by the thrust jack 53. The base frame 41 has mounting pins 56 formed at its four corners that protrude downward, and the mounting pins 56 have horizontal holes formed in them. On the other hand, the docking frame 51 has receiving holes 57 formed in the vertical direction to receive the mounting pins 56, and further has a horizontal hole formed at a position that coincides with the horizontal hole of the mounting pin 56 and intersects the receiving hole 57. This fixing structure connects the base frame 41 and the docking frame 51 by inserting the mounting pin 56 into the receiving hole 57 and passing a stop pin 58 through the overlapping horizontal hole. Note that the relationship between the mounting pins 56 and the receiving hole 57 may be reversed between the base frame 41 and the docking frame 51.

[0019] Next, normal removal work in the obstacle remover 1 is performed using only the auger 3. The obstacle remover 1 moves the auger 3 to a predetermined work position by operating the undercarriage 11, where it is adjusted to match the driving position of the casing K. Then, the leader 13 is tilted, i.e., the auger 3 is leveled, by extending and retracting the front-to-back swing cylinder 26 and the left-to-right swing cylinder 27. The obstacle remover 1 is also stabilized during removal work by the front jack 61 and leader jack 62 located at the front, or the weight 64 and rear jack 63 mounted at the rear.

[0020] In the obstacle remover 1, the auger 3, which has been moved to a raised position by the extension of the lifting cylinder 24, grips the casing K, and the rotation is transmitted to the cone via a reducer and a transmission gear by the drive of the hydraulic motor 45, causing the casing K to rotate. At the same time, the lifting cylinder 24 contracts, causing the casing K to descend together with the auger 3, with the carbide bit at the tip cutting a circular path through the concrete or other material present underground. The auger 3 releases the casing K with each stroke of the lifting cylinder 24, returns to the raised position, and re-grabs it. Furthermore, because the casing K only has a fixed length, when it is to be pressed into a deeper position, as many extension casings K as necessary are sequentially connected.

[0021] After that, the casing K that has been pressed in to a predetermined depth is pulled out, and pieces of concrete that have been cut off from the surrounding area are grabbed and discharged by a hammer grab suspended from a mobile crane. The casing K is pulled out by reverse rotation of the auger 3 and lifting of the lifting cylinder 24. During the pulling out process, the auger 3 is repeatedly re-grabbed in accordance with the stroke of the lifting cylinder 24, and the pulled-out extension casing K is separated.

[0022] However, the force required to pull out the casing K varies depending on the length of the casing K pressed into the ground and the ground conditions, such as the concrete, and it may be difficult to pull out the casing K using only the output of the lifting cylinder 24. Therefore, in the obstacle remover 1 of this embodiment, the pulling is performed using the auger lifting device 5 instead of the lifting cylinder 24. However, to attach the auger lifting device 5 to the auger 3, the mounting pins 56 of the base frame 41 must be simultaneously inserted into the four receiving holes 57 of the docking frame 51. This attachment work, which requires accurately aligning the auger 3 attached to the pile driver 2 with the auger lifting device 5 placed on uneven ground, is extremely difficult.

[0023] Therefore, in this embodiment, a method for attaching the auger lifting device 5 to the auger 3 is proposed. Here, Fig. 6 is a front view showing the state in which the auger lifting device 5 is attached to the auger 3, with the right side showing the state ready for attachment and the left side showing the attached state. Also, Fig. 7 is a diagram showing a lifting device for carrying out the attachment method of this embodiment. This lifting device 65 is a lever block (registered trademark) that connects the auger lifting device 5 to the auger 3 so that it can be lifted. The auger 3 and the auger lifting device 5 have hanging ears 47, 59 for connecting the lifting device 65 that protrude outward at multiple locations.

[0024] The hanging ears 47, 59 are provided at two locations near the center of the front of the auger 3 and the auger lifting device 5, and one location each on the left and right sides rearward near the leader 13, excluding the rear side where the leader 13 is located. The hanging ear 47 of the auger 3 has a pillar portion extending upward with its base end joined to a bottom plate fixed to the upper surface of the base frame 41, and an upper cross beam portion bending at a substantially right angle from the upper end of the pillar portion and extending outward substantially horizontally, with a through-hole provided near the outer tip of the upper cross beam. The hanging ear 59 of the auger lifting device 5 has a lower cross beam portion extending outward with its base end joined to the underside of a bottom plate fixed to the underside of the docking frame 51 so as to stand upright, with a through-hole provided near the outer tip of the lower cross beam. The length of the pillar portion of the hanging ear 47 is set so that the distance between the through hole provided in the upper cross beam portion and the through hole provided in the lower cross beam portion is longer than the total length when the lifting device is suspended in the manner described below and is shortened to its shortest length.

[0025] In this embodiment, the hanging ears 47 and 59 are provided with through holes such that the distance between the center of the through hole in the hanging ear 47 and the center line of the mounting pin 56 is equal to the distance between the center of the through hole in the hanging ear 59 and the center line of the receiving hole 57. The four sets of hanging ears 47 and 59 are arranged in positions where they overlap one another when the auger lifting device 5 is attached to the auger 3. The hanging ears 47 and 59 are formed from iron plates, and a shackle 66 is attached to the through hole at the tip. A main body hook 651 and a chain hook 652 of the lifting device 65 are hooked onto the shackle 66.

[0026] To install the auger lifting device 5, first, as shown on the right side of FIG. 6 , the auger lifting device 5 is placed on the ground directly below the auger 3, which is at a predetermined height. Next, the hanging ears 47 are attached to the auger lifting device 5, and the hanging ears 59 are attached to the auger 3. The hanging ears 47, 59 may be attached in advance. Then, as shown in FIG. 7 , the four hanging ears 47, 59 are connected to each other by a lifting device 65. The auger 3 and the auger lifting device 5 need only be positioned such that the hanging ears 47, 59 are roughly vertically aligned and can be connected by the lifting device 65. Next, an operator operates the lever handle 653 of the lifting device 65, which causes the ratchet mechanism to reel in the chain 654 and raise the auger lifting device 5. The auger lifting device 5 is then pulled up toward the auger 3, which is supported by the leader 13, and rises. The lifting device 65 has a braking function so it will not fall.

[0027] The auger lifting device 5 is further raised by the operator repeatedly operating the lever handle 653, and the four lifting devices 65 are evenly wound up, maintaining a generally horizontal position. At this point, the auger lifting device 5 is suspended by the chain 654 and positioned directly below the auger 3 due to gravity. Thus, the further raised auger lifting device 5 is placed on top of the auger 3 from below, and the mounting pin 56 of the auger 3 is inserted into the receiving hole 57 of the auger lifting device 5 formed vertically. Note that even if there is some misalignment, the receiving hole 57 side can be aligned with the mounting pin 56 by pushing the suspended auger lifting device 5.

[0028] After the retaining pin 56 is inserted into the receiving hole 57, as shown in Figure 5, a stop pin 58 is passed through the overlapping horizontal holes of the retaining pin 56 and the receiving hole 57. Therefore, the retaining pin 56 does not come out of the receiving hole 57, and the base frame 41 and the docking frame 51 are joined together, completing the attachment of the auger lifting device 5 to the auger 3. Then, the lifting cylinder 24 of the pile driver 2 contracts, and the auger lifting device 5 is placed on the ground via the horizontal jack 54. Then, after the lifting device 65 is removed, the hanging ears 47, 59 are removed.

[0029] To extract the casing K using the auger lifting device 5, first, as shown in the left half of Fig. 5, the thrust jack 53 is retracted, shortening the distance between the docking frame 51 and the lower frame 52. The chuck cylinder 46 of the auger 3 is retracted, causing the chuck 44 to grip the casing K. Then, the hydraulic motor 45 is driven to rotate the casing K in the reverse direction, and as shown in the right half of Fig. 5, the hydraulic cylinder 83 of the thrust jack 53 of the auger lifting device 5 is extended, lifting the auger 3 and extracting the casing K upward. Even in the case of the auger lifting device 5, the auger 3 can only be extracted by the stroke of the thrust jack 53, so the auger 3 is re-gripped by the retraction operation.

[0030] The auger 3 is raised and lowered using the auger lifting device 5 while the auger 3 is restrained by the leader 13. Therefore, the movement of the auger 3 along the leader 13 must not create resistance to the extension and retraction of the thrust jack 53. Therefore, when the auger lifting device 5 is driven to perform extraction, the hydraulic pressure is released from the lifting cylinder 24, the front-rear swing cylinder 26, and the left-right swing cylinder 27, switching them to a state in which they can each freely extend and retract. Note that while the use of the auger lifting device 5 has been described in connection with the extraction of the casing K, the auger lifting device 5 may also be used when pressing in the casing K.

[0031] Therefore, even when the obstacle remover 1 requires the installation of an auger lifting device 5, the installation method of this embodiment allows the auger lifting device 5 to be easily installed on the auger 3. Generally, the mounting pins 56 of the auger 3 are inserted into the receiving holes 57 of the auger lifting device 5 placed on the ground by operating the pile driver 2, but this requires the difficult insertion operation of even a single mounting pin 56 to be performed simultaneously for all four, resulting in a significant installation burden. In this regard, with this embodiment, the hanging auger lifting device 5 can be brought close to the auger 3 supported by the leader 13, allowing the mounting pins 56 to be inserted into the receiving holes 57, making installation extremely simple.

[0032] Furthermore, the installation method of this embodiment has a fixed structure in which the receiving hole 57 and the mounting pin 56 are fitted together vertically, so the installation method, which involves lifting the auger lifting device 5, has a simple configuration and is easy to install. Furthermore, the lifting device 65 is manually operated by an operator who winds up the chain 654 by rowing the lever handle 653, so the auger lifting device 5 can be installed at low cost. Moreover, with the installation method of this embodiment, even if there is some misalignment between the auger 3 and the auger lifting device 5, the operator can use their strength to align the receiving hole 57 with the mounting pin 56.

[0033] Although one embodiment of the present invention has been described above, the present invention is not limited to this and various modifications are possible without departing from the spirit of the present invention. For example, in the above embodiment, a lever block (registered trademark) operated to raise and lower with a lever handle is used as the lifting device 65, but a chain block operated by pulling a hand chain may also be used. Furthermore, in the above embodiment, the lifting device 65 is structured using a chain, but may be structured using a wire rope. In addition, in the above embodiment, the hanging ears 59 of the auger lifting device 5 are fixed to the underside of the docking frame 51, but the structure may also be such that a bottom plate is fixed to the side of the docking frame 51, the base end is joined to the bottom plate, and the lower cross beam portion is extended outward. [Explanation of symbols]

[0034] 1... Obstacle remover 2... Pile driver 3... Auger 5... Auger lifting device 13... Leader 24... Lifting cylinder 41... Base frame 42... Chuck frame 47, 59... Lifting ear 51... Docking frame 52... Lower frame 53... Thrust jack 54... Horizontal jack 56... Mounting pin 57... Receiving hole 58... Stop pin 65... Lifting device 66... ​​Shackle K... Casing

Claims

1. A method for attaching an auger lifting device to an auger, which is a rotation output device that is attached to the leader of a pile driver so that it can be raised and lowered, from the underside of the auger, a connecting step of connecting the auger located at a predetermined height to the auger lifting device placed on the ground below the auger using a plurality of lifting devices; a lifting step of lifting the auger lifting device connected to the auger by operating the lifting device; a connecting step of connecting the auger and the auger lifting device raised by the lifting device with a fixing structure that fits together in the vertical direction; A method for attaching an auger lifting device to an obstacle removal machine having the same.

2. 2. The method for installing an auger lifting device in an obstacle remover according to claim 1, wherein the lifting step is performed by the manually operable lifting device.

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