JP6630265B2 - Top sheave of pile removal equipment - Google Patents

Description

  The present invention relates to a novel structure of a top sheave installed at an upper end of a removing device used for removing a pile buried underground, for example.

  Conventionally, when removing a pile buried in the soil, a method of suspending a wire with a crane, securing the pile head, and gradually pulling out the wire has been adopted. If the buried pile is long, a common method is to remove the pile in stages, such as cutting the pile at a fixed length and removing it, replacing the wire, securing a new pile head, and pulling out. Has been widely adopted.

  In general, concrete buildings such as buildings have long piles buried underground for ground stabilization.In such a case, when pulling out the piles, the leader should be vertically held by the back bracket from the front bracket of the vehicle. Start up, install a top sheave at the tip of this leader, excavate while rotating the bit provided at the tip of the casing, while suspending the splittable casing vertically on this top sheave to secure the periphery of the pile. After securing the base of the pile, pull it up and suspend the two wires on the hook suspended from the top sheave inside the upper casing, and secure the pile head at the tip of the wire. , Are wound up by a predetermined length with a winch, cut off as appropriate, and removed. For example, as an example of a pile removal method, as shown in FIG. 3, after removing a casing, a multi-pulley puller 100 is installed on the ground, and is suspended from a top sheave on a multi-pulley 101 hanging by two wires. The lower end of the wire 102 is wound around the pile head 103, and the pile 104 is gradually pulled out. In this case, since the wire diameter is large, it is inevitable that a difference in height occurs between the left and right wires after the ball winding 103 is performed. Therefore, if the multiple pulley 101 is lifted, tension is not applied to the lower one of the Japanese hot water wires. Next, as shown in FIG. 4, after the pile is pulled out to a desired height, the pile head is secured in advance with a wire 106 suspended from another sheave 105, and the pile is cut and removed by a splitter 107. A series of removal methods is completed.

JP 2011-140801 A JP-A-2006-35144

  Patent Documents 1 and 2 are both related to an excavator, but basically include a configuration for driving a casing which is a premise of the present invention, and can suspend a wire to secure a pile head. It also has a configuration that can be used. And in patent document 1, when a several wire is arrange | positioned three-dimensionally, it prevents that a wire socket and a wire contact. Patent Document 2 aims at raising and lowering an auger with one winch.

  However, in securing the pile head, in the conventional configuration, two wires are suspended in parallel from the top sheave on a hook suspended by one wire, and a loop is formed at the tip of the hook. It is a configuration that secures the head. Then, a very strong tensile resistance is applied to one wire. In the above Patent Documents 1 and 2, it is assumed that the pile is pulled out with such a configuration. By the way, the wire used in this method has a large diameter in order to suspend heavy objects, but when the pile head is secured by the loop provided at the tip of the wire suspended from the hook, the wire is shifted vertically. Often occurs. Then, a difference occurs in the tension applied to the two wires. In any case, since the diameter of this kind of wire is large, it is physically impossible to adjust the tension of the two wires equally on site. In this case, when the hook is pulled up by the winch, the winding torque is applied only to the shorter wire, resulting in a one-load state, which is dangerous. In addition, if the pile is wound up in such a one-load state, one wire suspended from the top sheave may be cut or extra force may be applied to the leader due to strong resistance when cutting the pile from the soil. Therefore, there is a risk that the vertically provided reader may be inclined. As a result, there is a problem that the pile cannot be pulled out vertically.

  In the conventional configuration, a hook suspended from the top sheave is generally provided at the tip of one wire. For example, two hooks are separately driven independently to suspend a structure widely. In some cases, a new crane was required.

  An object of the present invention is to provide a top sheave having a configuration in which a pile can be pulled out vertically by winding up two wires with equal torque by separate winding circuits.

In order to achieve the above object, according to the present invention, as a configuration of a top sheave, a main bracket installed in a horizontal direction, sub-brackets extending in the left-right direction from one direction of the main bracket, and a longitudinal direction of the main bracket, A pair of first sheaves and second sheaves provided on the main bracket and rotating separately from each other, and a pair of first sheaves and second sheaves provided on the main bracket. a pair of parallel sheaves wires, each of which travels through the second sheaves, the provided auxiliary bracket, and a pair of angle adjusting sheave provided at a position flared outwardly from each of these parallel sheaves, the distal end side of the sub-bracket a is composed of a plurality communication sheaves respectively provided at the next stage of the angle adjusting sheave, said pair of sheaves, And line sheave, and the angle adjusting sheave, each of the plurality communication sheave wound wire, each of the distal end of the wire hook by means of provided. The rear end of the wire that winds the pair of first and second sheaves that rotate separately is wound around a wire collection drum provided near the ground to raise and lower the hook. . By using such means, the pair of hooks can be operated independently and separately.

Further, the main bracket further includes a pair of force steadying sheaves along the longitudinal direction of the main bracket, and a steadying wire is bridged between these sheaves to prevent horizontal swinging. That means was used. In addition, three sheaves are used as the plural sheaves. When the wire sheave drum is driven up and down by driving the wire sheave drum, the triple sheave moves up and down by a distance of one sixth with respect to the rotation of the wire recovery drum, and finely adjusts the height position of the hook precisely. It becomes possible.

With the means of providing the parallel sheave, the angle adjustment sheave, and the multiple sheaves at symmetrical positions with respect to the center axis of the main bracket, even when a load is applied to a pair of hooks, a downward load is uniformly applied to the bracket. Therefore, stable operation is possible.

  According to the present invention, for example, by using two independent hooks to secure the pile head, the tension applied to the wire when the pile is lifted is adjusted to be equal, and a single load state is achieved. Can be avoided. Therefore, not only can the pile be pulled out vertically, but also the stress applied to the leader can be set almost vertically, so that the force for tilting the leader can be reduced, and safe construction can be achieved. It can be carried out. Further, since the hook suspended from the top sheave can be raised and lowered independently, it can be widely used as well as removing the pile.

The top view which shows one Embodiment of the top sheave of this invention. FIG. The schematic diagram which shows an example of the pile removal method conventionally performed. FIG. 4 is a schematic view showing a step following FIG. 3.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a plan view of a top sheave showing one embodiment of the present invention, and FIG. 2 is a front view including a hook. In the drawing, 1 is a main bracket of the top sheave, 2 is a rear end of the main bracket, 3 is a front end of the main bracket, and 4a and 4b are sub-brackets that protrude to the left and right sides of the main bracket front end 3 in a front view. In addition, it is fixed to the main bracket 1 by a known means such as welding or bolting. The rear end portion 2 and the front end portion 3 are names for indicating a positional relationship, and have no particular meaning. The main bracket 1 of the top sheave is detachably provided at an end of a reader (not shown) by an adapter assay (not shown). Then, the skeleton of the top sheave is formed by these configurations.

  Next, the sheave rotatably fixed to the bracket will be described. Reference numeral 5 denotes an auger elevating sheave. Similarly, an auger elevating wire 7 for elevating the main winding auger is provided between the auger elevating sheave 6. It is to be wound. The auger elevating wire 7 extends downward from the auger elevating sheave 5 and is connected to a wire collection drum that is rotated by a winch driven by power in the ground part of the construction apparatus. The other end of the auger elevating wire 7 extends vertically from the auger elevating sheave 6 and is connected to the upper end of the auger. Numerals 8 and 9 denote sheaves for preventing the force from being swayed. The sway-preventing wires 10 for preventing the main bracket 1 from swaying in the plane direction during operation are bridged.

  The structure for hanging a hook, which is an important structure of the present invention, will be further described. In the figure, reference numeral 11 denotes a first hook and 12 denotes a second hook. Suspended from. Wire tips 15 and 16 are fixed to the hooks 11 and 12, respectively. After the wires 17.18 are wound around the triple sheaves 13 and 14, the angle adjusting sheaves 19 and 14 are passed through the triple sheaves 13 and 14. After turning the wires 17 and 18 inward by 20, the wire 17 of the first hook 11 is wound around the first sheave 23 and the wire 18 of the second hook 12 is wound around the second sheave 24 after passing through two parallel sheaves 21 and 22. It is turned and collected by wire collection drums (not shown) installed near the ground, and the wire collection drums are separately and independently driven by winches. Although the first sheave 23 and the second sheave 24 are provided coaxially with the auger elevating sheave 6 in the drawing, they are intended to save space, and are provided rotatably on separate shafts. There may be. Further, in this embodiment, the sheaves for suspending the hooks 11 and 12 are the triple sheaves 13 and 14. In this case, the wire between each hook and the sheave has one sixth of the load. Power will be added. However, if the wire itself has a high withstand load, these sheaves can be changed to double sheaves. In this case, the tips 15 and 16 of the respective wires 17 and 18 are fixed not to the hooks 11 and 12 but to a socket (not shown) provided at the lower portion of the bracket 1. In other words, if the number of branches is odd, the tip of the wire is fixed to the hook, and if the number is even, the tip of the wire is fixed to the socket provided on the bracket. Range.

  The operation of the above-described embodiment will be described. First, a necessary wire is laid over the top sheave of the present embodiment installed at the tip of the reader, and the required height is secured while adding the leader. The wires required here are the auger elevating wire 7, the hook suspending wires 17 and 18, and the force steadying wire 10. Depending on the type of construction, it is a matter of course that another wire may be bridged over another sheave. Then, these wires are wound around a wire collecting drum installed on the ground, and are independently fed and wound by rotating and driving the wire collecting drum with a winch. In this case, the first hook 11 and the second hook 12 can be independently raised and lowered by different winches. Therefore, for example, if the apparatus of the present embodiment is applied to a pile removal method, two wires can be suspended from the first hook 11 and the second hook, respectively, without using the multiple pulley 101 unlike the conventional method. In addition, even when the wires provided on each of the wires are wound around the pile head, the tension applied to each wire can be adjusted.

  In the description of the present embodiment, an example in which a pile buried in the ground is removed has been described. However, the present invention device is not only used for the pile removal method, but also a top sheave installed at the tip of the leader. It is possible to use the hook suspended from for another purpose, and its use range is not limited to the pile removal method.

DESCRIPTION OF SYMBOLS 1 Main bracket 4a, 4b Sub bracket 5.6 Auger lifting sheave 7, 8, 10, 17, 18 Wire 11, 12 Hook 13, 14 Triple sheave 19, 20 Adjustment sheave 21, 22, Parallel sheave 23 First sheave 24 Second sheave

Claims (5)

A top sheave provided at a tip of a leader of a pile removing device , wherein the top sheave is a main bracket installed in a horizontal direction, sub-brackets extending from one direction of the main bracket in left and right directions, and the main bracket. A pair of first sheaves and second sheaves provided on the main bracket and separately rotating, provided on the main bracket, and a pair of first sheaves provided on the main bracket. a pair of parallel sheaves, each wire through a sieve and the second sieve is traveling, the provided auxiliary bracket, and a pair of angle adjusting sheave provided in a position diverging from these parallel sheaves outside respectively, the auxiliary bracket of a distal end side, and a plurality communication sheaves respectively provided at the next stage of the angle adjusting sheave, said pair Sheave and a parallel sheaves, and the angle adjusting sheave, wound each of the plurality communication sheaves wires, the top wheel of pile vent and wherein each the hook is provided at the distal end of the wire. 2. The pile remover according to claim 1, wherein the rear end of the wire that winds the pair of first sheave and second sheave that rotate separately is wound around a wire collection drum provided near the ground to raise and lower the hook. Top sheave of the device . The main bracket is further provided with a pair of force-sway sheaves along the longitudinal direction of the main bracket, and a steady-state wire is bridged between the sheaves to prevent horizontal deflection. 3. The top sheave of the pile removing device according to 1 or 2. The top sheave of the pile removing device according to claim 1, wherein the plurality of continuous sheaves are three. The top sheave for a pile removing device according to any one of claims 1 to 4, wherein the parallel sheave, the angle adjusting sheave, and the multiple sheave are provided at symmetrical positions with respect to a center axis of the main bracket.

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