Luffing rope support and method of using the luffing rope support

Abstract

To provide a derricking rope cradle which can safely and easily bring a derricking rope into a transport state, and a method of using the derricking rope cradle.SOLUTION: A derricking rope cradle 39 is used as a transport jig for a construction machine comprising a gantry 22 derrickably and detachably provided on a revolving body and a derricking winch winding a derricking rope 24, and stores and transports a portion of the derricking rope 24 fed out from the derricking winch in a state where the derricking rope 24 is arranged in the gantry 22. The derricking rope cradle 39 comprises: a bottomed frame-like storage portion 41 storing the portion of the derricking rope 24 as a bundle 40 obtained by winding multiple times and bundling; a hanging portion 42 for lifting; and attaching portions 43, 44 capable of being attached to and detached from the gantry 22.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a hoisting rope gantry and a method of using the hoisting rope gantry, and more particularly to a hoisting rope gantry used when disassembling and transporting construction machinery and a method of using the hoisting rope gantry.

Background Art

[0002] In large construction machinery, such as a three-point pile driver, due to the mass limit during transportation, the gantry and the attached middle sheave block are integrally removed from the upper revolving body for transportation, and these are assembled and used at the site (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] As preparation for attaching and detaching the gantry, a process of bundling the hoisting ropes into a form suitable for transportation is performed. The hoisting ropes are wire ropes with a length exceeding 100 m. After being paid out from a hoisting winch mounted on the upper revolving body, they are wound around a plurality of sheaves of the middle sheave block via a gantry sheave block, and the rope ends are connected to the gantry sheave block.

[0005] The bundling process of the hoisting ropes is usually performed in a state where they are arranged on the gantry, and a method of tying and fixing the portion pulled out from the drum of the hoisting winch to the gantry is used. However, such work is high-altitude work performed on the gantry, and it also takes time to fix it using a wire (relatively soft iron wire), etc., so it has been a great burden on the operator.

[0006] Therefore, the present invention aims to provide a luffing rope support and a method for using the luffing rope support that can safely and easily transport the luffing rope. [Means for solving the problem]

[0007] To achieve the above objective, the luffing rope frame of the present invention is used as a transport jig for construction machinery, comprising a gantry that is luffable and detachable from a slewing body, and a luffing winch for winding a luffing rope, and the gantry... On the installed pulley The aforementioned undulating rope I put it on In this state, the luffing rope that has been extended from the luffing winch Not attached to the aforementioned pulley In a lifting rope platform for storing and transporting a portion of the lifting rope, Not attached to the aforementioned pulley It is characterized by having a bottomed frame-shaped storage section for storing the bundled parts that are wrapped around each other multiple times, a lifting section for hoisting, and a mounting section that can be attached to and detached from the gantry.

[0008] Furthermore, the method of using the luffing rope support of the present invention is a method of using the luffing rope support, characterized in that the luffing rope support is placed on the ground with the gantry in a lowered position, aligned with the direction in which the luffing rope of the luffing winch is paid out; the bundle is stored in the storage section in a figure-eight shape in plan view while the luffing rope is paid out; the end of the luffing rope is removed from the drum of the luffing winch; and the luffing rope support is attached to the gantry using the suspension part and the mounting part. [Effects of the Invention]

[0009] According to the present invention, the luffing rope support includes a bottomed frame-shaped storage section for storing the luffing rope as a bundled unit, a lifting section for hoisting, and a mounting section that can be attached to and detached from the gantry. This makes it possible to perform the bundled processing of the luffing rope, which previously required work at height, on the ground, and to efficiently carry out a series of operations such as crane transport, attachment to the gantry, and separation and loading of the gantry. In other words, the luffing rope can be transported safely and easily. Moreover, since the procedure is carried out to store the bundled unit of the luffing rope in a figure-eight shape in plan view, even when both ends of the rope are fixed, that is, when one end of the rope is fixed to the gantry and the other end of the rope is fixed to the luffing winch, no undue force is applied to the luffing rope, and a stable storage state can be obtained. [Brief explanation of the drawing]

[0010] [Figure 1] This is a side view of a gantry equipped with a luffing rope support, illustrating one embodiment of the present invention. [Figure 2] This is a view along the line II-II in Figure 1. [Figure 3] This is a cross-sectional view taken along line III-III in Figure 1. [Figure 4] This is a cross-sectional view taken along line IV-IV in Figure 1. [Figure 5] This diagram also shows the process of storing the luffing ropes in the luffing rope support structure. [Figure 6] This diagram also shows the process of separating the luffing rope support from the upper rotating body, along with the gantry. [Figure 7] This is a cross-sectional view taken along line VII-VII in Figure 6. [Figure 8] This is a cross-sectional view taken along line VIII-VIII in Figure 6. [Figure 9] This is a cross-sectional view taken along line IX-IX in Figure 6. [Figure 10] This is a side view of a pile driver to which a luffing rope support is also applied. [Modes for carrying out the invention]

[0011] Figures 1 to 10 show an example of a luffing rope frame in one embodiment of the present invention applied to a pile driver, which is an example of a construction machine. As shown in Figure 10, the pile driver 11 comprises a base machine 14 consisting of a lower traveling body 12 and an upper rotating body 13 that is rotatably mounted on the upper part of the lower traveling body 12; a leader bracket 15 that is detachably mounted on the front of the upper rotating body 13; a leader 16 that is rotatably mounted on the front end of the leader bracket 15; a pair of left and right front jacks 17 provided on both sides of the leader bracket 15; a pair of left and right outrigger jacks 18 provided on the rear of the upper rotating body 13; and a pair of left and right back stays 19 that support the leader 16 from the rear of the upper rotating body 13.

[0012] Furthermore, an outrigger box 20 to which an outrigger jack 18 is attached and a counterweight 21 placed on the outrigger box 20 are provided at the lower rear end of the upper slewing body 13. In addition, a gantry 22 is provided above the rear of the upper slewing body 13, which is retractable and detachable.

[0013] As shown in Figure 5, the gantry 22 is equipped with a gantry sheave 25 for guiding the luffing rope 24 that is unfurled from the luffing winch 23 located at the central rear of the upper slewing body 13. The luffing rope 24, when the gantry 22 is upright (Figure 10), rises upward from the luffing winch 23, passes through the pulley 25a of the gantry sheave 25, and is then wrapped around multiple pulleys 26a of the middle sheave block 26 and multiple pulleys 25a of the gantry sheave 25, with the end of the rope 24a fixed to the support shaft 25b of the gantry sheave 25 (Figure 2). Furthermore, the other end of a pendant rope 27, one end of which is connected to the leader 16, is connected to the middle sheave block 26. In this way, with the luffing rope 24 deployed on the gantry 22, the leader 16 can be raised and lowered by winding in or unwinding the luffing rope 24 with the luffing winch 23.

[0014] Further, as shown in FIGS. 8 and 9, the gantry 22 is pivotally and detachably mounted in the front-rear direction by a hydraulic pin coupling device 29 to a pair of left and right front legs 30, 30 whose lower ends are provided on the front part of the main frame of the upper swing body 13, and a pair of left and right rear legs 33, 33 whose upper ends are pivotally mounted via a support shaft 25b of the gantry sheave 25 to the upper ends of the front legs 30, 30 and whose lower ends are pivotally and detachably mounted by a hydraulic pin coupling device 32 to a pair of left and right rear brackets 31, 31 provided on the rear part of the main frame of the upper swing body 13. For example, it is provided on the rear part of the upper swing body 13 so as to be able to rise and fall by the hoisting operation of the crane. Further, between the front legs 30 and the rear legs 33, a well-known rear leg suspension link 34 for holding the relative angle formed by the front legs 30 and the rear legs 33 at a set angle is provided (see FIG. 1, Patent Document 1).

[0015] As shown in FIG. 2, on the upper surfaces of the pair of left and right front legs 30, 30, a pair of left and right gantry lifting ladders 35, 35, a plurality of suspension parts (lifting lugs) 36, and a mounting part 37 of the middle sheave block 26 are provided respectively. As shown also in FIGS. 3 and 4, the gantry lifting ladder 35 has a pair of vertical bars 35a, 35a provided in parallel with each other along the longitudinal direction on the upper surface side of the front leg 30, a plurality of horizontal bars 35b connecting the pair of vertical bars 35a, 35a, inner mounting arms 35c provided at a plurality of locations on the inner vertical bar 35a, and outer mounting arms 35d provided at positions corresponding to the inner mounting arms 35c on the outer vertical bar 35a, and is bolted to a bracket or a screw seat provided on the peripheral wall of the front leg 30 via both mounting arms 35c, 35d.

[0016] When transporting such a pile driver 11, it is disassembled into multiple parts according to its mass and size and loaded onto a transport vehicle such as a trailer respectively. First, large parts such as the leader 16, the backstay 19, and the counterweight 21 are removed from the upper swing body 13. Then, with the gantry 22 laid down backward and the front legs 30, 30 in a substantially horizontal state, the middle sheave block 26 is fixed to the mounting portion 37 with a fixing pin 38. As a result, the middle sheave block 26 is fixed to the lower end portion (front end portion in the laid-down state) between the left and right front legs 30, 30 (Fig. 2). At this time, the pendant rope 27 is appropriately wound up and held on the gantry 22 with little slack.

[0017] Here, as a preparation for attaching and detaching the gantry 22, a process of bundling the hoisting rope 24 into a form suitable for transportation is performed. Since the bundling process of the hoisting rope 24 is carried out in a state where it is deployed on the gantry 22, considering the assembly property, it is efficient to extract it from the drum of the hoisting winch 23. However, in order to bundle the hoisting rope 24 extracted from the drum, not only is it necessary to climb onto the gantry 22, but also the labor of fixing it with wires or the like is incurred. Therefore, for such a bundling process of the hoisting rope 24, a hoisting rope mount 39 that can safely and easily put the hoisting rope 24 into a transportation state is used.

[0018] As shown in Figs. 1 to 4, the hoisting rope mount 39 is a transport jig that stores and transports the portion of the hoisting rope 24 fed out from the hoisting winch 23 (the portion not looped around the plurality of pulleys 26a of the middle sheave block 26 and the plurality of pulleys 25a of the gantry sheave 25), and can be handled integrally with the gantry 22. It includes a storage portion 41 that stores the portion of the hoisting rope 24 as a bundled body 40 formed by looping the portion of the hoisting rope 24 multiple times and bundling it (bundled in a substantially figure-eight shape in plan view), a hanging portion 42 for lifting, front-side attachment portions 43 and rear-side attachment portions 44 that can be attached to and detached from the gantry 22, and a handrail 45 for the gantry scaffold.

[0019] The storage section 41 is formed in the shape of a bottomed frame that is sized to accommodate the bundled body 40 appropriately, and has a roughly rectangular bottom plate 41a corresponding to the longitudinal direction of the gantry 22, and a pair of side plates 41b on the front, back, left, and right. Four support legs 41c are provided on the lower side of the bottom plate 41a, and a number of guide plates (for example, six) are provided on the upper side of the bottom plate 41a for holding the bundled body 40 of the luffing rope 24 to the inner surface of the side plates 41b, and these plate pieces are provided with four hanging holes 42a on the front, back, left, and right to form hanging parts (hanging ears) 42.

[0020] The front and rear mounting portions 43 and 44 have a symmetrical shape that forms a pair on the left and right, and are capable of engaging with a pair of left and right gantry ladders 35, 35, and are fixed to the outer surface of the side plate 41b of the storage portion 41, respectively. The front mounting portion 43 is a plate that is roughly in the shape of an inverted J when viewed from the side, and its tip projection 43a is formed to be able to engage with an engagement groove 35e recessed in the upper part of a bracket provided on the inner vertical bar 35a of the gantry ladder 35. On the other hand, the rear mounting portion 44 is a bifurcated bracket that is roughly in the shape of an inverted U when viewed from the side, and pin holes 44b, 44b through which fixing pins 46 are inserted are provided at the lower ends 44a, 44a of the front and rear plates that sandwich the horizontal bar 35b of the gantry ladder 35.

[0021] The following describes how to transport the luffing rope 24 using the luffing rope support 39, with reference to Figures 5 to 9. First, as shown in Figure 5, the gantry 22 is tilted backward on the upper rotating body 13 so that the front legs 30, 30 are approximately horizontal. At this time, the middle sheave block 26 is fixed to the front end of the gantry 22 in advance, and accordingly, the luffing rope 24 is deployed on the gantry 22 with a predetermined amount of excess length wound up.

[0022] Next, the prepared luffing rope support 39 is aligned with the direction in which the luffing rope 24 of the luffing winch 23 is paid out and placed on the ground. Specifically, it is placed on the ground with a front-to-back gap so that the front end of the storage section 41 is aligned with the position directly below the gantry sheave 25. In this state, the luffing rope 24 is paid out to the rear and the portion of the luffing rope 24 is placed on the luffing rope support 39 by hand. At this time, on the bottom plate 41a of the storage section 41, the bundled portion of the luffing rope 24 is sandwiched between multiple guide plates (hanging sections 42) and side plates 41b, and is stored in the storage section 41 as a bundled body 40 while maintaining an approximately figure-eight shape.

[0023] When the luffing rope 24 that was wound around the luffing winch 23 is depleted, (though not shown in the diagram) the end of the luffing rope 24 is removed from the drum of the luffing winch 23, and the portion of the luffing rope 24 is stored in the luffing rope frame 39. Then, using the lifting operation of the crane with the lifting section 42, the luffing rope frame 39 is carried onto the gantry 22, and attached to its fixed position between the front legs 30, 30 of the gantry 22 using the front mounting section 43 and the rear mounting section 44. As a result, the middle sheave block 26 and the luffing rope frame 39 are held in a stable position side by side on the gantry 22 (Figure 2).

[0024] To separate the gantry 22 from the upper slewing body 13, as shown in Figure 7, the suspension position is changed from the suspension part 42 of the luffing rope frame 39 to the suspension part 36 of the gantry 22. Then, as shown in Figures 8 and 9, hoses 47 and 48 for hydraulic supply are connected to the pin coupling devices 29 and 32 of the front legs 30 and 30 and the rear legs 33 and 33, respectively, and pressurized oil is obtained to operate them in the pin removal direction. This releases the connection between each leg 30 and 32 and the upper slewing body 13. When the connection is released, a rear leg suspension link 34 is attached between the front leg 30 and the rear leg 33, and the rear leg 33 is held at a set angle relative to the front leg 30.

[0025] Thus, the luffing rope support 39, which can be transported together with the gantry 22, is transported to the ground near the base machine 14 by the lifting operation of a crane, as shown in Figure 6. After the transport base 49 is attached to the rear legs 33 of the gantry 22, it is loaded onto the cargo bed of a transport vehicle in that state. When it is delivered to the site, the reverse procedure described above is performed during the assembly of the pile driver 11. That is, the luffing rope 24 is taken up again by the luffing winch 23, while the empty luffing rope support 39 is moved to a designated storage area at the site.

[0026] As described above, according to the present invention, the luffing rope frame 39 is equipped with a bottomed frame-shaped storage section 41 for storing the luffing rope 24 as a bundled body 40, a lifting section 42 for lifting, and attachment sections 43 and 44 that can be attached to and detached from the gantry 22. Therefore, the bundling of the luffing rope 24, which previously required work at height, can be performed on the ground, and a series of subsequent operations such as crane transport, attachment to the gantry 22, and separation and loading of the gantry 22 can be carried out efficiently. In other words, the luffing rope 24 can be transported safely and easily. Moreover, since the procedure is carried out to store the bundled body 40 of the luffing rope 24 in a figure-eight shape in plan view, even when both ends of the rope are fixed, that is, when one end of the rope is fixed to the gantry 22 and the other end of the rope is fixed to the luffing winch 23, no undue force is applied to the luffing rope 24, and a stable storage state can be obtained.

[0027] It should be noted that the present invention is not limited to the above-described embodiments, and various configurations can be considered for each part of the luffing rope support, taking transportability into consideration, and can be appropriately modified according to the specifications of the gantry and the length of the luffing rope. Furthermore, although a pile driver was used as an example in the embodiments, the invention is not limited to this and can be applied to other large construction machines equipped with a gantry. [Explanation of Symbols]

[0028] 11...Pile driver, 12...Lower traveling body, 13...Upper rotating body, 14...Base machine, 15...Leader bracket, 16...Leader, 17...Front jack, 18...Outrigger jack, 19...Back stay, 20...Outrigger box, 21...Counterweight, 22...Gantry, 23...Lowing winch, 24...Lowing rope, 24a...Rope end, 25...Gantry sheave, 25a...Pulley, 25b...Support shaft, 26...Middle sheave block, 26a...Pulley, 27...Pendant rope, 28...Front bracket, 29...Pin coupling device, 30...Front leg, 31...Rear bracket T, 32...Pin coupling device, 33...Rear leg, 34...Rear leg suspension link, 35...Gantry lifting ladder, 35a...Vertical rung, 35b...Horizontal rung, 35c...Inner mounting arm, 35d...Outer mounting arm, 35e...Engaging groove, 36...Suspension part, 37...Mounting part, 38...Fixing pin, 39...Looping rope frame, 40...Bundling body, 41...Storage part, 41a...Bottom plate, 41b...Side plate, 41c...Support leg, 42...Suspension part, 42a...Suspension hole, 43...Front mounting part, 43a...Tip projection, 44...Rear mounting part, 44a...Tip lower part, 44b...Pin hole, 45...Handrail, 46...Fixing pin, 47,48...Hose, 49...Transport base

Claims

1. A luffing rope frame is used as a transport jig for a construction machine equipped with a gantry that is detachably and can be raised and lowered on a rotating body, and a luffing winch for winding a luffing rope, and with the luffing rope hanging on a pulley provided on the gantry, it stores and transports the portion of the luffing rope that is not hanging on the pulley after it has been unfurled from the luffing winch, A bottomed frame-shaped storage section for storing the portion of the aforementioned relief rope that is not attached to the pulley by wrapping it around multiple times and bundling it together to form a bundle, A lifting section for hoisting, A mounting part that can be attached to the aforementioned gantry, A lifting rope support characterized by having the following features.

2. The luffing rope support according to Claim 1, characterized in that a plurality of guide plates are provided inside the frame of the storage section for holding the bundled body in a figure-eight shape in a plan view.

3. A luffing rope stand used as a transport jig for a construction machine equipped with a gantry that can be raised and lowered and detachably mounted on a slewing body, and a luffing winch for winding a luffing rope, wherein the luffing rope stand stores and transports a portion of the luffing rope unwound from the luffing winch with the luffing rope positioned on the gantry, the luffing rope stand comprising a bottomed frame-shaped storage section for storing the portion of the luffing rope bundled together after being wrapped around multiple times, a lifting section for lifting, and a mounting section detachably attached to the gantry, in a method of using the luffing rope stand, With the aforementioned gantry lying down, The steps include: placing the luffing rope support on the ground, aligning it with the direction in which the luffing rope of the luffing winch is extended; The steps include: extending the aforementioned undulating rope while storing the bundled body in the storage section in a figure-eight shape in a plan view; The steps include removing the end of the luffing rope from the drum of the luffing winch, The steps include: attaching the luffing rope frame to the gantry using the suspension portion and the mounting portion; A method for using a rafter rope support, characterized by performing the following steps in order.

4. A method for using the luffing rope support according to claim 1 or 2, With the aforementioned gantry lying down, The steps include: placing the luffing rope support on the ground, aligning it with the direction in which the luffing rope of the luffing winch is extended; The steps include: extending the aforementioned undulating rope while storing the bundled body in the storage section in a figure-eight shape in a plan view; The steps include removing the end of the luffing rope from the drum of the luffing winch, The steps include: attaching the luffing rope frame to the gantry using the suspension portion and the mounting portion; A method for using a rafter rope support, characterized by performing the following steps in order.

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