JP4805054B2 - Hamaglab and its crown device - Google Patents

Description

  The present invention relates to a hammaglab and a crown device thereof, and particularly suitable for a case where the weight of an object is large, such as when a concrete pile embedded in the ground is cut and pulled up at predetermined lengths. It relates to the crown device.

  As shown in Patent Document 1, the hammer magnet is often used for digging a casing driver. As shown in FIG. 18, this hammer magnet bucket (hereinafter sometimes referred to as a bucket) 1 is mounted on a crane (not shown) and is taken up and delivered by a hoisting winch (auxiliary winch) 2 and boom ( (Not shown) is supported by a bucket suspension rope 3 suspended from the top of this, and this bucket 1 is placed in a casing built by a casing driver, the brake of the hoisting winch 2 is released, and the bucket 1 is With the shell 1a opened, it is allowed to fall freely to bite into the bottom of the ground in the casing, and then the bucket hanging rope 3 is wound up to close the shell 1a, and further wound up to pull up the bucket 1 to the ground, and the shell 1a is opened and discharged. Digging is done by repeating the work of soiling. In FIG. 18, 4 is a winding winch (main winding winch) for lifting the casing driver.

  In such a bucket 1, the crown 5 is used to open the shell 1 a of the bucket 1 for earth removal, and to open the shell. Normally, as shown in Patent Documents 2 and 3, for example, the crown 5 includes a crown head connected to a hoisting rope or a chain, and a cylindrical weight attached to the crown head so as to be movable up and down. The crown head has a bell shape with an opening on the top so that the bucket suspension rope 3 and the like are passed therethrough, and a plurality of locking claws are rotatably attached to the crown head. The weight is for operating the locking claw, and the locking claw is placed between a locking posture and a non-locking posture with respect to the suspension support cylinder 6 provided at the top of the bucket 1 as shown in FIG. Provided to rotate.

  As shown in Patent Document 2, the crown is hung from a crane boom to a fixed height by a wire rope or chain, or as shown in FIG. 18, a hoisting winch 7 different from the hoisting winch 2 is used. Is supported by the hoisting rope 9 that is wound and fed out in such a manner that it can move up and down.

  In this hammer magnet, when the bucket 1 is dropped into the ground, the bucket suspension rope 3 is wound up, the shell 1a is closed and the earth and sand are taken in, and the shell opening direction biasing spring 45 in the bucket 1 (see FIG. 3 below). Is compressed, and when the bucket suspension rope 3 is further wound up, the bucket 1 is pulled upward. And after pulling up to the earth removal position on the ground, the latching claw of the crown 5 catches the latching part above the suspension cylinder 6 at the top of the bucket 1. Thereby, the bucket 1 is supported by the hoisting rope 9 via the crown 5. For this reason, when the bucket suspension rope 3 is loosened, the shell 1a is expanded by the force of the spring 45 in the bucket 1, and the earth and sand in the shell 1a is discharged to the ground. A latch 37 fixed to a chain 46 connected to the bucket suspension rope 3 is locked by a latch 36 at the top of the bucket 1, and the bucket 1 is supported by the bucket suspension rope 3 with the shell 1 a opened. In this state, when the bucket suspension rope 3 is wound up or the hoisting rope 9 is lowered by the hoisting winch 7 and the crown 5 is lowered, the weight of the crown 5 rises relative to the crown head and the crown head is engaged. The latch of the suspension support cylinder 6 by the pawl is released, the crown 5 can be removed from the suspension support cylinder 7, and the hammaglab can be freely dropped.

JP-A-6-317079 JP-A-10-54049 Utility Model Registration No. 3032615

  When rebuilding a concrete building, the present inventors cut a concrete pile buried in the ground and pull it out, and rotate the opening / closing claw for cutting together with the casing by the casing driver and the pile. Has been developed as a Japanese Patent Application No. 2005-364172.

  In this way, when the underground pile is cut and pulled up to the ground, if the pile diameter or length is large, the weight of the cut pile also increases, and the total weight of the cut pile and the weight of the bucket 1 is also added. Become big. For example, if the weight of the bucket 1 is 3t and the cut pile is 7t, the total weight reaches 10t. Here, if the hoisting capacity of the hoisting winch (supplementary winch) 2 is 10 t, it is impossible to lift the pile more than that, and it is impossible to lift the pile having a weight greater than that. In order to efficiently cut and lift the pile, it is necessary to increase the cutting length of the pile as much as possible and reduce the number of cutting operations and the number of lifting operations. However, according to the conventional technique shown in FIG. There is a limit. In addition, when there are large obstacles such as large boulders or buried trees in the ground, there is a problem that these obstacles may not be removed due to the limitation of the pulling capacity.

  When pulling up an object that exceeds the weight that can be wound by the hoisting winch (auxiliary winch) 2, the crown 5 remains locked to the suspension cylinder 6 at the top of the bucket 1, Both the hoist winches 7 are simultaneously operated in the hoisting direction to lift the bucket 1, but it is very difficult to synchronize the hoisting speeds of the two winches 2, 7 and the crown 5 If the hoisting force of the hoisting rope 9 suspending the hoist is too strong, the bucket hoisting rope 3 is loosened, and there is a risk that the shell 1a opens and the heavy object held by the shell 1a falls.

  In view of the above problems, the present invention relaxes the weight limit of buried objects such as underground piles that are pulled up from the ground, enables efficient removal of the buried objects, and makes the lifting operation easy and safe. It is an object to provide an increasing hammaglab and its crown device.

The crown device of the hammaglab according to claim 1 comprises:
In the hammaglab provided with a hammaglab bucket wound by a hoisting winch of the crane and suspended by a bucket suspending rope suspended from the top of the boom, and having a crown device for suspending a hummaglab bucket,
A first crown that is detachably locked to a suspension cylinder at the top of the hammer magnet bucket and that allows a latch that moves up and down together with the bucket suspension rope to pass through the interior;
A second crown that supports the first crown by a flexible support member, is supported by the hoisting means having a higher lifting force than the bucket suspension rope via the flexible support member, and passes the bucket suspension rope. And
The second crown has a locking body that can be changed to a locking or non-locking position or posture with respect to the latch, and means for selecting the position or posture of the locking body,
In the state in which the locking body of the second crown is locked to the latch, it is possible to lift the hammer magnet bucket by the winding means having a large lifting force.

The crown device for a hammaglab according to claim 2 is the crown device for the hammaglab according to claim 1,
The second crown includes a crown head through which the bucket suspension rope passes, and a weight attached to the crown head so as to be movable up and down.
The means for selecting the position or posture of the locking body is engaged with the weight, and the weight is displaced up and down with respect to the crown head, so that the locking posture and the non-locking posture with respect to the latch. It consists of a pivotable pawl.

The crown device of the hammaglab according to claim 3 is the crown device of the hammaglab according to claim 2,
The second crown has means for holding the relative position of the weight relative to the crown head in the vertical direction;
The position holding means is provided on the crown head and has a guide body having a guide groove forming a substantially heart-shaped closed loop; the guide body is provided on the weight; a part thereof is inserted into the guide groove; and the guide A moving body biased by a spring toward the groove,
Steps for preventing the return of the moving body are provided in the vicinity of the respective groove portions in the upper left and right sides, the upper central portion, and the lower central portion of the guide groove.

The crown device for the hammaglab according to claim 4 is the crown device for the hammaglab according to any one of claims 1 to 3.
The hoisting winch is an auxiliary winding winch;
The hoisting means having a large lifting force includes a main winding winch mounted on the crane, a hoisting rope wound up by the main hoisting winch, and the hoisting rope at a position suspended from the top and the top of the boom. It consists of an upper and lower sheave block that hangs around and a hook attached to the lower sheave block.

  According to a fifth aspect of the present invention, there is provided a hammer magnet comprising the crown device according to any one of the first to fourth aspects.

  In the first aspect of the present invention, the latch that moves up and down by the bucket suspension rope is locked to the second crown, and the hammer magnetic bucket is wound by the hoisting means (another crane, another hoisting winch) having a large lifting force. Can be rolled up using a sheave block with multiple hoisting ropes to be taken out or a hoisting winch with a large hoisting force, so there is no weight limitation due to the hoisting winch that supports the hammer magnet bucket. It is possible to remove a buried object that has been impossible in weight. For this reason, for example, in the underground pile removing operation of cutting and pulling the underground piles by a predetermined length, the number of cutting operations and the number of removing operations can be reduced, and the work efficiency can be increased.

  In addition, since a heavy object can be rolled up by one hoisting winch, the operation is easier than in the case of using two hoisting winches for hoisting a bucket as in the prior art described above. In addition, there is no possibility that the buried object holding the bucket will fall, and safety is improved.

  Further, even a boulder or a buried tree that cannot be lifted by a bucket hanging rope that supports a hammer magnet bucket can be lifted.

  In the invention of claim 2, the means for selecting locking or non-locking with respect to the latch is engaged with the weight, and the weight is displaced up and down with respect to the crown head. Since it is configured with a locking claw that can be rotated between a locking posture and a non-locking posture, the locking claw can be operated by placing or releasing the second crown on the first crown, For example, actuators such as hydraulic cylinders and electromagnets for locking and unlocking, piping and wiring therefor are not required, and the configuration can be simplified.

  In the invention of claim 3, since the position holding means for the weight of the second crown is configured as described above, the locking claw can be moved by placing or moving the second crown on or away from the first crown. It can be changed alternately between the locked posture and the non-locked posture.

  According to the fourth aspect of the present invention, the main winding winch provided in the hammer magnet that cooperates with the casing driver can be used for lifting a heavy load, and a separate crane is not required.

  Since the invention according to claim 5 comprises the hammaglab with the crown device according to any one of claims 1 to 4, the effects described above can be obtained.

  FIG. 1 is a perspective view showing an embodiment of a hammaglab provided with a crown device of the present invention. In this embodiment, it shows about the case where the crane 10 which comprises a hammaglab is used for the cutting | disconnection and removal of the underground pile 12 with the casing driver 11. FIG. The crane 10 is placed on a frame 13 for receiving a reaction force for excavation connected to a casing driver 11 or installed so as to support a reaction force by a crawler type traveling body 14 described later. This crane 10 has a revolving unit 15 installed on a crawler type traveling unit 14, a power unit 16 equipped with a hydraulic pressure source and a power source, and a cab 17 are mounted on the revolving unit 15. The undulation device 21 is undulated. Reference numerals 2 and 4 denote hoisting winches mounted on the revolving body 15. In the present embodiment, the hoisting winch 2 is usually referred to as an auxiliary winding winch, and the second winch 4 is usually referred to as a main winding winch. Is.

  The casing driver 11 builds the add-on casing 22 in the ground, a lifting frame that is moved up and down by a hydraulic cylinder or the like along the guide frame, a rotating body that is mounted on the lifting frame and is rotated by a hydraulic motor, A chuck device that chucks the rotating body to the casing 22, and rotates or swings the casing 22 while the casing 22 is chucked to the rotating body by the chuck device, while rotating the lifting frame along the guide frame by the hydraulic cylinder. The casing 22 is built into the ground by being lowered together with the body and pushed into the ground. When one of the casings 22 is built, a new casing is suspended by another crane or crane 10. The casing 22 is built by repeating the work of adding. In this embodiment, the casing 22 is built concentrically with the underground pile 12, and inserted between the casing 22 and the underground pile 12, for example, with the cutting machine shown in the Japanese Patent Application No. 2005-364172. 12 is cut and pulled up using the bucket 1 to be removed.

  In the cutting machine shown in Japanese Patent Application No. 2005-364172, an open / close bucket is inserted into the casing 22 between the underground pile 12 and the casing 22, and the open / close bucket is operated in a closing direction by a hydraulic cylinder. The excavation claw provided on the ground pile 12 is bitten into the underground pile 12, and the cutting machine is rotated together with the casing 22 by the casing driver 11, so that the cutting groove is cut from the outer peripheral side of the underground pile 12 by the bucket of the cutting machine. Is.

  FIG. 2 is a perspective view showing a configuration of the crown device shown in FIG. Reference numeral 1 denotes a hammer mag bucket having a lower shell 1 a, and 2 denotes the hoisting winch (winding winch) that winds and pays out a bucket hanging rope 3 that supports the bucket 1. It hangs down from the sheave 23. Reference numeral 24 denotes a hoisting rope wound and fed by the hoisting winch (main winding winch) 4. The hoisting rope 24 includes a plurality of sheaves 26 of a sheave block 25 attached to the top of the boom 19, and the boom 19. It is hung between a plurality of sheaves 29 of the sheave block 27 suspended from the top of the sheave rope 24 by the hoisting rope 24. Reference numeral 30 denotes a hook attached to the frame of the sheave block 27 that is suspended.

  Reference numeral 5 denotes a crown for detachably locking the suspension support cylinder 6 at the top of the bucket 1, and this is hereinafter referred to as a first crown. Reference numeral 31 denotes a second crown, and the second crown 31 is supported by the hook 30 on a flexible support member 32 such as a wire rope or a chain. The first crown 5 is supported by the second crown 31 via a flexible support member 33 (which may be an extension of the flexible support member 32).

  FIG. 3 is a cross-sectional view showing an example of the internal structure of the bucket 1. Reference numeral 6 denotes a suspension cylinder that is slidably attached to a bracket 34 fixed to the upper portion of the bucket 1 over a predetermined vertical width. The suspension cylinder 6 includes a spring 35 as shown in a sectional view of FIG. Is biased downward. Reference numeral 36 denotes a latch of the suspension support cylinder 6 on which a latch 37 is hung. The latch 36 is attached to the bracket 34 so as to be rotatable around a pin 38. Reference numeral 39 denotes an upper sheave rotatably attached to the upper portion of the bucket 1 via a shaft 40, 41 denotes an elevating frame attached to the bucket 1 so as to be movable up and down, and 42 denotes a lift frame 41 via a shaft 43. A lower sheave 44, which is rotatably mounted, is a wire rope hung around an upper sheave 39 and a lower sheave 42. Reference numeral 45 denotes a pressing spring provided between a support member that supports the shaft 40 and the lifting frame 41.

  A chain 46 is attached to the bucket suspension rope 3 via a swivel joint 47, and the latch 37 is attached to the lower part thereof, and the chain 46 and the wire rope 44 are connected to each other.

  1a is a shell attached to the bottom left and right sides of the bucket through a pin 50 so as to be openable and closable, and the shell 1a has an arc shape in plan view. These shells 1a are connected to the elevating frame 41 via a link 51. When the elevating frame 41 is raised and lowered, the shell 1a operates in the closing direction and the opening direction.

  The first crown 5 shown in FIG. 4 has a known structure, and a plurality of locking claws 54 are attached to the crown head 52 so as to be rotatable about a shaft 53, and a cylindrical weight 55 is provided outside the crown head 52. When the weight 55 is in a position lowered with respect to the crown head 52, the tilted posture is such that the protruding locking portion 6a on the upper portion of the suspension support cylinder 6 is not locked. On the other hand, when the weight 55 is raised with respect to the crown head 52, the locking claw 54 assumes a horizontal posture capable of locking the locking portion 6a.

  5 is a side view showing the second crown 31, FIG. 6 is a plan view thereof, and FIG. 7 is a cross-sectional view taken along line AA of FIG. Reference numeral 56 denotes a cylindrical crown head, and flexible support members 32 and 33 made of the wire rope or chain are connected to a bracket 57 provided on the top thereof by bolts 58a and nuts 58b.

  Reference numeral 59 denotes a locking claw for locking the latch 37. The locking claw 59 is inserted and attached to a window 62 provided on the crown head 56 so as to be rotatable about a shaft 61 attached to a parallel plate-like bracket 60 provided on the outer surface of the crown head 56. A plurality (three in this example) of the locking claws 59 are provided. As shown in FIG. 7, the shaft 61 is provided to be deviated to the outside of the crown head 56. It is supported by the bottom portion of the window 62 and takes a horizontal locking posture in which the latch 37 can be locked. A cover 63 is fixed to the bracket 60 and is provided to protect the locking claw 59.

  Reference numeral 64 denotes a cylindrical weight mounted on the outer periphery of the crown head 56 so as to be movable up and down with respect to the crown head 56. In this embodiment, a plurality of (three in this example) provided on the weight 64 are provided. The rod 65 is slidably fitted to the guide cylinders 66 provided outside the crown head 56 so that the weight 64 can be prevented from rotating with respect to the crown head 56 and can be displaced up and down. ing. A stopper 65 a is attached to the top of the rod 65, and the stopper 65 a comes into contact with the upper surface of the guide cylinder 66, thereby preventing the weight 64 from coming off from the crown head 56. In this embodiment, the weight 64 is urged downward with respect to the crown head 56 by its own weight. A spring may be additionally used as the downward biasing means.

  Reference numeral 67 denotes an operating body for operating the locking claw 59. The operating bodies 67 are respectively provided below the locking claw 59 with respect to the locking claw 59, and the weight 64 is relative to the crown head 56. When it is moved upward, the operating body 67 pushes up the locking claw 59 and displaces it to a release posture in which the latch 37 is not locked. Further, when the operating body 67 is lowered relative to the crown head 56, the locking claw 59 takes a horizontal locking posture, that is, a posture capable of being locked with the latch 37 placed thereon. However, even in this locking posture, when the latch 37 is pulled up and applied to the locking claw 59 from below, the locking claw 59 can be pushed upward and the latch 37 can be passed through the crown head 56. .

  The second crown 31 further has means for holding the relative position between the crown head 56 and the weight 64. The position holding means includes a guide body 69 attached to the outer surface of the crown head 56 by a bolt 72 and a moving body 71 that movably presses against a guide groove 70 provided in the guide body 69.

  The moving body 71 is mounted on a shaft 73 provided in a radially projecting manner on the outer surface of a weight 64, a cylindrical body 74 fitted to the shaft 73 so as to be pivotable and secured to the shaft 73, and It includes an arm portion 75 provided integrally with the cylindrical body 74 so as to protrude in the radial direction, and a cylindrical body 76 provided integrally with the tip of the arm portion 75. A part of the movable body 71 is accommodated in the cylindrical body 76, and a pressing spring 78 is interposed between the movable body 71 and a spring receiver 77 provided on the cylindrical body 76, and the distal end of the movable body 71 is guided to the guide body. The guide groove 70 is pressed and brought into contact therewith. Reference numeral 79 denotes a cover that covers members constituting these position holding means.

  As shown in FIG. 8 (A), the guide groove 70 has a substantially heart shape, and as shown in FIG. 8 (B), the left groove 70a gradually increases from the top to the bottom, and the bottom of the groove 70 gradually increases. (In the radial direction of the weight 64). Further, as shown in FIG. 8C, the groove portion 70a on the right side of the guide groove 70 is formed so that the bottom surface of the groove 70 gradually increases from the bottom to the top. Further, a step 70c for preventing the moving body 71 from returning is formed in a portion below the guide groove 70 that is a boundary between the left groove 70a and the right groove 70b formed on these inclined surfaces. Further, the upper central portion 70d of the guide groove 70 has a shape that is lowered downward, and as shown in FIG. 8D, from the highest portion of the right groove portion 7b to the lowest portion of the left groove portion 7a, A groove 70j that is continuous with the left-side inclined groove 70a having a planar bottom surface, the left-upward groove portion 70i, and the left-side inclined groove portion 70a with the bottom surface inclined is formed in the vicinity of these groove portions 70h, 70i, and 70j. Step portions 70e, 70f, and 70g for preventing the return of the moving body 71 are formed.

  9 to 12 are diagrams for explaining the operation and operation of the locking claw 59 of the second crown 31 shown in FIGS. 5 to 8. Now, as shown in FIG. 9A, when the weight 64 is in the lower relative position with respect to the crown head 56, the stopper 65a at the upper part of the rod is prevented from coming off while being in contact with the upper surface of the guide cylinder 66. The At this time, as shown in FIG. 9B, the moving body 71 is pressed against the bottom surface of the lower portion of the groove 70b by the force of the spring 78. In this state, the second crown 31 is supported by the flexible support member 32 and the weight 64 of the second crown 31 is not in contact with the first crown 5 below the second crown 31.

  In a state where the bucket 1 is supported by the bucket hanging rope 3, when the hoisting winch 4 is operated and the hoisting rope 24 is fed out, the sheave block 27 is lowered, and the first crown 5 is first a bracket 34 at the top of the bucket 1. The second crown 31 is placed on the first crown 5 as shown in FIG. 15B. Accordingly, the weight 64 is relatively raised with respect to the crown head 56, the operating body 67 pushes up the locking claw 59, and the locking claw 59 is brought into the non-locking posture with respect to the latch 37. In the process in which 67 pushes up the locking claw 59, the movable body 71 rises along the groove portion 70b on the right side of the guide body 69, and the arm portion 75 rises relatively while rotating somewhat. Then, it reaches the shallow groove portion 70h in the upper right portion of the guide groove 70 beyond the step portion 70e for preventing return. This state is shown in FIGS. 10 (A) and 10 (B).

  When the hoisting rope 24 is wound by the hoisting winch 4 from the state shown in FIGS. 10A and 10B, the sheave block 27 is raised and the second crown 31 is also raised, so that the weight 64 of the second crown 31 is increased. The weight 64 is separated from the first crown 5, and the weight 64 tries to drop with respect to the crown head 56 due to the weight of the weight 64. However, since the moving body 71 is fitted in the guide groove 70, the weight is prevented from falling. As a result, the moving body 71 moves along the groove portion 70 h formed downwardly to the left, and further reaches the groove portion 70 i beyond the step portion 70 f, while the weight 64 is slightly lowered with respect to the crown head 56. This state is shown in FIGS. 11 (A) and 11 (B). In this state, the weight 64 is supported via the arm portion 75, and the locking claw 59 is held in a non-locking posture with respect to the latch 37.

  Next, when the hoisting winch 4 is actuated again in the feeding direction of the hoisting rope 24 to the state shown in FIG. 15B, the weight 64 is again raised relative to the crown head 56. With the relative upward movement of the weight 64, the moving body 71 rises along the groove portion 70i that rises to the left of the guide groove 70, and reaches the groove portion 70j beyond the step portion 70g. This state is shown in FIGS.

  Subsequently, when the hoisting winch 4 is operated in the winding direction of the hoisting rope 24, the second crown 31 is raised again, the weight 64 is separated from the first crown 5, and the weight 64 is lowered with respect to the crown head 56. Therefore, the moving body 71 descends along the groove portion 70a on the left side of the guide groove 70, exceeds the step portion 7c, reaches the lower portion of the groove portion 7b, and the stopper 65a comes into contact with the upper surface of the guide groove 66, and further descends. Is prevented. This state is the state of FIGS. 9A and 9B, that is, the locking claw 59 is in a posture in which the latch 37 can be locked.

  In this manner, in the state where the bucket 1 is supported by the bucket suspension rope 3, the hoisting rope 24 of the hoisting winch 4 is taken up and the second crown 31 is placed on the first crown 5 or pulled up and separated. 9A and 9B, the locking claw 59 is set to the locked position as shown in FIGS. 9A and 9B, or the locking claw 59 is not locked as shown in FIGS. Can be changed.

  Next, with reference to FIG. 13 to FIG. 17, operations and operations in the case of performing an underground pile removing operation using a hammaglab provided with this crown device will be described. In FIG. 13A, when removing the underground pile 12 as described above, the casing 22 is installed concentrically on the underground pile 12 by the casing driver 11, and the underground pile 12 is removed by a cutting machine (not shown). A state in which the cut pile 12A to be pulled up is provided by the shell 1a of the bucket 1 after the cut 12X is provided at a predetermined length from the top of the bucket 1 is shown.

  The cutting pile 12A is gripped as follows. When the cut pile 12A is gripped by the bucket 1, as shown in FIG. 3, the hook 36 is hung on the lower surface of the latch 36 and the bucket 1 is hung by the bucket hanging rope 3, that is, the shell 1a is opened. The bucket hanging rope 3 is fed out by the operation of the winch 2, and the shell 1a is put on the top of the cut pile 12A. When the bucket 1 is lowered and the cut pile 12A is gripped by the shell 1a in this way, the bucket suspension rope 3 is slightly loosened from the deviation of the lowering inertia force and the timing at which the hoisting winch 2 is braked. As a result, the suspension cylinder 6 is lowered by the spring force of the pressing spring 35 shown in FIG. 4, and the latch 36 rotates about the pin 38 as shown by the arrow a in FIG. 4, and the inner end of the latch 3 faces downward. And is released from the latch 37.

  When the bucket suspension rope 3 is wound up with the latch 37 detached from the latch 36 in this way, the swivel joint 47 and the lifting chain 46 connected to the bucket suspension rope 3 are also wound together, and the latch 37 is suspended. It escapes upward from the supporting cylinder 6. Here, since the wire rope 44 is hung between the lower sheave 42 attached to the elevating frame 41 and the upper sheave 39 attached to the bucket 1, the elevating frame 41 is used. Is also pulled upwards. Thereby, the shell 1a connected to the elevating frame 41 via the link 36 operates in the closing direction, and the upper portion of the cut pile 12A is gripped by the shell 1a. At this time, a claw or a plurality of sharp protrusions (not shown) provided on the shell 1a bite into the cut pile 12A, and the cut pile 12A is prevented from falling. FIG. 13A shows a state in which the cut pile 12A is gripped by the shell 1a in this way. The state of the crowns 5 and 31 is shown in FIG.

  Subsequently, the hoisting winch 4 is actuated to feed the hoisting rope 24, the sheave block 27 is lowered as shown in FIGS. 13A and 13B, and the second crown 31 is positioned below the latch 37. Let Here, if the weight 64 of the second crown 31 is in a position lowered with respect to the crown head 56, the locking claw 59 is in a horizontal locking posture as shown in FIG. When the second crown 31 is lowered below the latch 37, the latching claw 59 is pushed upward by the latch 37 and rotates, so that the latch 37 can be passed. In this case, after lowering the second crown 31 until the latch 37 is above the second crown 31, this time, the hoisting rope 24 is wound up, as shown in FIGS. 14 (A) and 16 (A). When the latch 37 is locked on the locking claw 59 of the second crown 31 and the hoisting rope 24 is further wound up by the hoisting winch 4, the bucket 1 is in a state where tension is applied to the wire rope 44. That is, with the shell 1a biased in the closing direction, the wire rope 44, the latch 37, the second crown 31, the flexible support member 32, and the hoisting rope 24 wound around the sheave blocks 27, 25 Winded up. At this time, the bucket suspension rope 3 is in a relaxed state.

  If the locking claw 59 is in the non-locking posture as shown in FIGS. 11 (A) and 15 (A) when the second crown 31 is lowered as shown in FIG. 13 (A), Of course, the latch 37 can be passed through the second crown 31. In this case, the first crown 5 is attached to the bracket 34 and the suspension support at the top of the bucket 1 in order to change the locking claw 59 to the locking posture. Then, the second crown 31 is lowered and placed on the first crown 5 as shown in FIGS. 13B and 15B. By moving the second crown 31 onto the first crown 5, the moving body 71 moves from the groove portion 70i shown in FIG. 11B to the groove portion 70j beyond the stepped portion 70g as shown in FIG. 12B. Thereafter, by winding up the hoisting rope 24, the operating body 67 is lowered together with the weight 64 with respect to the crown head 56, as described above, and accordingly, the moving body 71 is lowered along the groove 70a, The locking claw 59 is set to the horizontal locking posture shown in FIG. In this state, by further winding the hoisting rope 24 with the hoisting winch 4, as shown in FIGS. 14 (A) and 16 (A), the latch 37 is locked on the locking claw 59, The bucket 1 holding the cut pile 12 </ b> A can be lifted via the hoisting rope 24 that is hung around the wire rope 44, the latch 37, the flexible support member 32, and the sheave blocks 27 and 25.

  Subsequently, when lowering the cut pile 12A to the ground, the hoisting rope 24 is fed out by the hoisting winch 4 to land the cut pile 12A on the ground GL as shown in FIG. Thereafter, the hoisting winch 2 is operated to support the bucket 1 and the cut pile 12A, and as shown in FIGS. 14 (B) and 16 (B), the hoisting rope 24 is further fed, and the bracket 34 and The first crown 5 is placed on the suspension cylinder 6 and the second crown 31 is placed thereon. By this operation, the weight 64 of the second crown 31 rises relative to the crown head 56, the moving body 71 is positioned at the groove portion 70h in FIG. 10B, and the locking claw 59 is in FIG. The non-locking posture shown in FIG. Thereafter, when the second crown 31 is pulled up, the locking claw 59 remains in the non-locking posture, and the moving body 71 is held in the groove 7i (non-locking position) shown in FIG.

  On the other hand, in the first crown 5, as shown in FIG. 16B (FIGS. 15B and 16A), the state of the first crown 5 is the same, but FIG. , (B) and FIG. 16 (A), the illustration of the locking claw 54 is omitted.) Since the weight 55 rests on the bracket 34, the weight 55 rises relative to the crown head 52, and The pawl 54 is in a horizontal locking posture and can be locked to the locking portion 6a of the hanging support cylinder 6, and as shown in FIG. In addition, the locking claw 54 is locked to the locking portion 6 a of the suspension support cylinder 6, and the bucket 1 and the cut pile 12 </ b> A include the first crown 5, the flexible support member 33, the second crown 31, and the like. Flexible support member 32. It can be supported via a hoisting rope 24 wound around the sheave blocks 25, 27. When the bucket hanging rope 3 is fed out by the hoisting winch 2 in a state where the bucket 1 is supported by the first crown 5 in this way, the shell 1a is opened, and the cut pile 12A is separated from the shell 1a and falls to the ground GL. Can do.

  Next, the wire rope 44 is pulled into the bucket 1 by the pressing spring 45 (see FIG. 3) in the bucket 1, and the bucket hanging rope 3 is wound up by the hoisting winch 2 from the state in which the latch 35 enters the bucket 1. Then, the latch 37 is hooked on the latch 36 shown in FIGS. 3 and 4, and the bucket 1 can be lifted by the bucket hanging rope 3. In a state where the bucket 1 is supported by the bucket suspension rope 3, the spring 35 is compressed, the suspension support cylinder 6 is raised, and the position of the locking portion 6a is raised. When the hoisting rope 24 is wound up and the first crown 5 is raised in a state where the locking portion 6a is raised, the crown head 52 is raised relative to the weight 55, so that the locking claw 54 is locked to the locking portion. The locking claw 54 is disengaged from the locking portion 6a. Therefore, the shell 1 a is opened and the bucket 1 is supported by only the bucket suspension rope 3, that is, the bucket 1 can be inserted into the casing 22.

  In this hammaglab, the hoistable weight of the hoisting winch (supplementary winch) 2 and the hoisting winch (main winding winch) 4 is assumed to be 10 t, and the number of the sheaves 26 and 29 of the sheave blocks 25 and 27 is shown in the figure. When the bucket 1 and the cut pile 12A are lifted by the hoisting rope 24, 60t can be lifted (however, the members related to lifting such as the wire rope 44 can withstand this 60t load. Assume that Therefore, even if the conventional winding winch 2 alone can lift only about 10 t, for example, the use of the main winding winch 4 enables lifting of an embedded object exceeding 10 t. For this reason, since the cutting pile 12A can be cut and lifted for each heavy size, it is possible to reduce the number of times of cutting and removing work, and to increase the efficiency of removing the underground pile. Can do.

  Further, since the embedded object can be wound up by one hoisting winch 4, the operation becomes easier as compared with the case where two hoisting winches are synchronized and used for hoisting the bucket. Since tension is always applied to the rope 44, there is no possibility that the embedded object holding the bucket will fall, and safety is improved.

  In addition, even a boulder or a buried tree that cannot be pulled up by the bucket hanging rope 3 that supports the bucket 1 can be pulled up.

  When practicing the present invention, selection of locking or non-locking with respect to the latch 37 may be performed by changing the position or posture of a locking body such as a locking pin or a locking claw with a hydraulic cylinder or an electromagnet. However, in the present embodiment, when the weight 64 is displaced up and down with respect to the crown head 56, the locking claw that can rotate in the locking position and the non-locking position with respect to the latch 37 is used. Since the selection means is configured, the locking claw 59 can be operated by the operation of placing or releasing the second crown 31 on or from the first crown 5, and the hydraulic pressure for locking and unlocking An actuator such as a cylinder or an electromagnet, piping therefor, wiring, etc. are not required, and the configuration can be simplified.

  Further, in the present embodiment, the position holding means of the weight 64 includes the guide body 69 and the moving body 71 that moves along the guide groove 70 with a stepped portion for preventing the return, so that the hydraulic cylinder or the electromagnet Without adding an actuator such as the above, the locking claw 54 can be alternately changed between the locking posture and the locking releasing posture by the vertical movement of the weight 64 relative to the crown head 56.

  When carrying out the present invention, as a lifting means having a large lifting force for suspending the second crown 31, another crane other than the crane constituting the hammaglab is used, or a hoisting winch 2 mounted on the crane constituting the hammaglab. A hoisting winch having a large hoisting force can be mounted and used. However, in the present embodiment, the hoisting means having a large lifting force includes the main winding winch 4 conventionally mounted on the crane 10, and the hoisting rope 24 is connected to the top of the boom 19 by the main winding winch 4. Since it comprises a sheave block 25, 29 comprising a plurality of sheaves 26, 29 and a hook 30 attached to the lower sheave block 27, the crane 10 which normally cooperates with the casing driver 11 is provided. The provided main winding winch 4 can be used for lifting a heavy load, and there is an advantage that a separate crane is unnecessary.

It is a side view which shows one Embodiment of the hammer magnet of this invention with a casing driver. It is a perspective view which shows the structure of the hammaglab of FIG. It is sectional drawing of the bucket of this Embodiment. It is a longitudinal cross-sectional view which shows the 1st crown and latch latch mechanism of this Embodiment. It is a side view of the 2nd crown of this embodiment. It is a top view of the 2nd crown of this embodiment. It is AA sectional drawing of FIG. (A) is a front view of a guide body provided on the second crown of the present embodiment, and (B), (C), and (D) are cross sections of BB, CC, and DD, respectively, of (A). FIG. (A) is a longitudinal sectional view showing one operation process of the second crown of the present embodiment, and (B) is a relative positional relationship diagram between the guide groove of the guide body and the moving body in this operation process. (A) is a longitudinal sectional view showing the operation process changed from FIG. 9, and (B) is a relative positional relationship diagram between the guide groove of the guide body and the moving body in this operation process. (A) is a longitudinal sectional view showing an operation process changed from FIG. 10, and (B) is a relative positional relationship diagram between the guide groove of the guide body and the moving body in this operation process. (A) is a longitudinal sectional view showing an operation process changed from FIG. 11, and (B) is a relative positional relationship diagram between the guide groove of the guide body and the moving body in this operation process. (A), (B) is a partial process figure in the case of performing the removal operation | work of a cutting pile using the hammer magnet of this Embodiment after the cutting | disconnection of an underground pile. (A), (B), (C) is the remaining process drawing in the removal work of the underground pile following FIG. (A), (B) is a relative relationship figure of the 1st, 2nd crown and latch in the removal operation | work of the underground pile of FIG. 13, FIG. (A), (B) is a relative relationship figure of the 1st, 2nd crown and latch in the removal operation | work of the underground pile of FIG. 13, FIG. It is a relative relationship figure of the 1st, 2nd crown and latch in the removal operation | work of the underground pile of FIG. 13, FIG. It is a perspective view which shows the structure of the conventional hammer magnet.

Explanation of symbols

1: Hammerbuck bucket, 1a: Shell, 2: Winding winch (supplementary winch), 3: Bucket hoisting rope, 4: Hoisting winch (main winding winch), 5: First crown, 6: For suspension support Cylindrical, 10: Crane, 11: Casing driver, 12: Underground pile, 12A: Cutting pile, 12X: Cut, 13: Underframe, 14: Crawler type traveling body, 15: Revolving body, 16: Power unit, 17: Operation Room. 19: boom, 20: hoisting winch, 21: hoisting device, 22: casing, 23, 26, 29: sheave, 24: hoisting rope, 25, 27: sheave block, 30: hook, 31: second crown, 32, 33: flexible support member, 34: bracket, 35: spring, 36: latch, 37: latch, 38: pin, 40, 43: shaft, 39: upper sheave, 41: lifting frame, 42: lower sheave 44: wire rope, 45: pressing spring, 46: chain, 47: swivel joint, 51: link, 52: crown head, 53: shaft, 54: locking claw, 55: weight, 56: crown head, 59: Locking claw, 60: bracket, 61: shaft, 62: window, 63: cover, 64: weight, 65: rod, 66: guide cylinder, 67: operating body, 69: guide body, 70 Guide grooves, 70a, 70b, 70h to 70j: groove portions, 70c, 70e to 70g: step portions for preventing return, 71: moving body, 73: shaft, 74: cylindrical body, 75: arm portion, 76: cylindrical body, 77 : Spring receiver, 78: Pressing spring, 79: Cover

Claims (5)

In the hammaglab provided with a hammaglab bucket wound by a hoisting winch of the crane and suspended by a bucket suspending rope suspended from the top of the boom, and having a crown device for suspending a hummaglab bucket,
A first crown that is detachably locked to a suspension cylinder at the top of the hammer magnet bucket and that allows a latch that moves up and down together with the bucket suspension rope to pass through the interior;
A second crown that supports the first crown by a flexible support member, is supported by the hoisting means having a higher lifting force than the bucket suspension rope via the flexible support member, and passes the bucket suspension rope. And
The second crown has a locking body that can be changed to a locking or non-locking position or posture with respect to the latch, and means for selecting the position or posture of the locking body,
The hammer magnet crown device, wherein the hammer magnet bucket can be lifted by the lifting means having a large lifting force in a state in which the locking body of the second crown is locked to the latch. The crown device for a hammaglab according to claim 1,
The second crown includes a crown head through which the bucket suspension rope passes, and a weight attached to the crown head so as to be movable up and down.
The means for selecting the position or posture of the locking body is engaged with the weight, and the weight is displaced up and down with respect to the crown head, so that the locking posture and the non-locking posture with respect to the latch. A crown device for a hammaglab, characterized by comprising a pawl that can rotate. The crown device for a hammaglab according to claim 2,
The second crown has means for holding the relative position of the weight relative to the crown head in the vertical direction;
The position holding means is provided on the crown head and has a guide body having a guide groove forming a substantially heart-shaped closed loop; the guide body is provided on the weight; a part thereof is inserted into the guide groove; and the guide A moving body biased by a spring toward the groove,
A crown device for a hammaglab, comprising step portions for preventing the moving body from returning in the vicinity of the groove portions at the left and right upper portions, the upper central portion, and the lower central portion of the guide groove. In the crown device of the hammaglab according to any one of claims 1 to 3,
The hoisting winch is an auxiliary winding winch;
The hoisting means having a large lifting force includes a main winding winch mounted on the crane, a hoisting rope wound up by the main hoisting winch, and the hoisting rope at a position suspended from the top and the top of the boom. A crown device for a hammaglab, comprising an upper and lower sheave block that hangs around, and a hook attached to the lower sheave block. A hammer magnet comprising the crown device according to any one of claims 1 to 4.

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