JP2009046893A - Pile driver and method of fixing hoisting rope - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pile driver and a method of fixing a hosting rope which improve workability in work of raising and laying down a leader. <P>SOLUTION: According to the pile driver 1, a rope support member 60 supports the hoisting rope 40 when the leader 20 is laid down. Because of this, the looseness of the hoisting rope 40 is suppressed even without winding up the hoisting rope 40 in work of laying down the leader 20. When the leader 20 is raised, the hoisting rope 40 is already fed out as the leader 20 is raised. In work of raising the leader 20, therefore, the hoisting rope 40 does not become tense even without feeding out the hoisting rope 40, which avoids damage to the leader 20 or severance of the hoisting rope 40. Hence workability is improved without winding up or feeding out the hoisting rope 40. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a pile driving machine and a method for fixing a hoisting rope, and more particularly to a pile driving machine and a method for fixing a hoisting rope that can improve workability in an operation of raising and lowering a leader.

  In general, a pile driver is supported by a vehicle body and has a leader on which a working device for hanging the pile is suspended, and a hoisting rope routed through the leader to suspend the working device on the leader. And a hoisting device for hoisting the working device with the hoisting rope, and winding and feeding the hoisting rope with the hoisting device to raise and lower the working device along the leader, It is configured so that work can be performed.

  Further, for example, Patent Document 1 discloses a pile driving method in which the leader 101 is supported to be able to be raised and lowered so that the leader 101 can be laid down with respect to the vehicle body 102 in order to ensure safety during traveling (see FIG. 4). A machine 100 is disclosed.

By the way, as disclosed in Patent Document 1, in the pile driving machine 100 capable of raising and lowering the leader 101, when the leader 101 is laid down, if the hoisting rope 103 is not wound up, as shown in FIG. The slack of the upper rope 103 occurs, and as a result, the hoisting rope 103 is dragged to the ground during traveling. When the leader 101 is erected, if the hoisting rope 103 is not sent out, the hoisting rope 103 is stretched, leading to damage to the leader 101 or cutting of the hoisting rope 103. For this reason, in the operation | work which raises / lowers the leader 101, it was necessary to wind up and send out the hoisting rope 103. FIG.
Japanese Utility Model Publication No.59-69236

  However, when the leader is laid down, the hoisting rope does not simply wind up, but the speed at which the leader is brought down and the speed at which the hoisting rope is taken up are not synchronized. It will cause damage and cutting of the hoisting rope. Similarly, when the leader is erected, the speed at which the leader is raised and the speed at which the hoisting rope is sent out must be synchronized instead of simply sending out the hoisting rope.

  As described above, in the pile driving machine capable of raising and lowering the leader, it is necessary not only to wind and feed the hoisting rope in the work for raising and lowering the leader, but also the speed to raise and lower the leader and the hoisting rope. In addition, there was a problem that workability was poor because the speed of feeding out had to be synchronized.

  The present invention has been made to solve the above-described problems, and provides a pile driving machine and a hoisting rope fixing method capable of improving workability in the work of raising and lowering the leader. It is aimed.

  In order to solve this object, a pile driving machine according to claim 1 is supported so as to be able to be raised and lowered and a work device for performing a pile driving work is suspended, and the work device is suspended from the leader. And a hoisting rope routed through the leader, and a rope support member disposed on the leader and having a latching portion for latching the hoisting rope, When the leader is laid down, the hoisting rope is hooked on the hooking portion, and the hoisting rope can be supported by the rope support member.

  The pile driver according to claim 2 is the pile driver according to claim 1, wherein the rope support member forms a closed space between the hooking portion and the leader, and the closed space. The hoisting rope is routed through.

  The pile driving machine according to claim 3 is the pile driving machine according to claim 1 or 2, wherein the rope support member has a plurality of the latching portions, and the plurality of latching portions are arranged at intervals. The distance is set to be larger than twice the minimum bending radius, which is the minimum radius with which the hoisting rope can be bent.

  According to a fourth aspect of the present invention, there is provided a hoisting rope fixing method comprising: a leader that is supported so as to be raised and lowered, and a work device for hanging a pile driving work; and a leader for hanging the work device on the leader. Fixing of the hoisting rope in a pile driving machine comprising a hoisting rope routed through the rope and a rope support member disposed on the leader and having a hooking portion for hooking the hoisting rope A rope supporting step in which the hoisting rope is hooked on the hooking portion and the hoisting rope is supported by the rope supporting member in a state where the leader is lying down, and the rope supporting step. A rope binding step of binding the hoisting rope supported by the rope support member with a binding member having a lower strength than the hoisting rope.

  The hoisting rope fixing method according to claim 5 is the hoisting rope fixing method according to claim 4, wherein the rope support member forms a closed space between the hooking portion and the leader, The hoisting rope is routed through the closed space, and the rope supporting step is inevitably caused by the hoisting rope being hooked on the hooking portion when the leader is laid down. Done.

  The method for fixing a hoisting rope according to claim 6 is the method for fixing a hoisting rope according to claim 4 or 5, wherein the rope support member includes a plurality of the latching portions, and the plurality of the latching portions. Are arranged at a predetermined interval, and the predetermined interval is set to be larger than twice the minimum bending radius that is the minimum radius at which the hoisting rope can be bent, and the rope support member in the rope support step A rope pulling step for pulling out the hoisting rope supported by the hooking portion.

  According to the pile driver according to claim 1, when the leader is laid down, the hoisting rope is hooked on the hooking portion, and the hoisting rope can be supported by the rope support member. In the operation of lying down the leader, even if the hoisting rope is not taken up (that is, even when the hoisting rope is sent out), it is possible to suppress the slack of the hoisting rope. Thereby, dragging of the hoisting rope during traveling can be avoided.

  In addition, when raising the fallen leader, the hoisting rope has already been sent out, so even if the hoisting rope is not sent out in the work to erect the leader, the hoisting rope does not stretch. It is possible to avoid damage to the leader and cutting of the hoisting rope.

  As described above, according to the present invention, it is not necessary to wind and feed the hoisting rope in the operation of raising and lowering the leader, and the speed for raising and lowering the leader and the speed for winding the hoisting rope as in the prior art. Since there is no need to synchronize the sheath feeding speed, it is possible to save work and improve workability.

  According to the pile driver according to claim 2, in addition to the effect produced by the pile driver according to claim 1, the rope support member forms a closed space between the latching portion and the leader, and the closure Since the hoisting rope is routed through the created space, the hoisting rope can be held in the closed space. As a result, when the leader is laid down, the hoisting rope can inevitably be hooked on the hooking portion, so that the work of hooking the hoisting rope on the hooking portion can be saved and further workability can be reduced. There is an effect that it is possible to improve.

  According to the pile driver according to claim 3, in addition to the effect produced by the pile driver according to claim 1 or 2, the rope support member has a plurality of latching portions, and the plurality of latching portions are predetermined. Since it arrange | positions at intervals, it has the effect that a hoisting rope can be hung over a some latching part, and the slack of a hoisting rope can be suppressed further.

  Further, according to the present invention, the interval between the latching portions is set to be larger than twice the minimum bending radius, which is the minimum radius at which the hoisting rope can be bent. The hoisting rope can be pulled out, and by pulling out the hoisting rope, there is an effect that it is possible to further suppress the slack of the hoisting rope.

  According to the fixing method of the hoisting rope according to claim 4, the hoisting rope is hooked on the hooking portion in the rope supporting step, the hoisting rope is supported by the rope supporting member, and the rope is supported in the rope binding step. The hoisting rope supported by the member is bound by the binding member. Thereby, since the hoisting rope supported by the rope support member can be bound and fixed by the binding member, it is possible to surely suppress the slack of the hoisting rope.

  Further, according to the present invention, in the rope binding step, the hoisting rope is bound by the binding member having a lower strength than that of the hoisting rope, so even if the leader is raised without removing the binding member, the binding is performed. By damaging the member, it is possible to prevent the hoisting rope from being stretched and to avoid damage to the leader and cutting of the hoisting rope.

  According to the method for fixing the hoisting rope according to claim 5, in addition to the effect of the method for fixing the hoisting rope according to claim 4, the rope support step inevitably takes up when the leader is laid down. Since the rope is hooked on the hook, it is possible to save the labor of having to hang the hoisting rope on the hook and improve workability. is there.

  According to the method for fixing the hoisting rope according to claim 6, in addition to the effect exerted by the hoisting rope fixing method according to claim 4 or 5, the hoisting rope supported by the rope support member in the rope supporting step Since it pulls out from between the latching portions in the rope drawing process, there is an effect that it is possible to suppress the slack of the hoisting rope.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described with reference to the accompanying drawings. First, a schematic configuration of the pile driving machine 1 will be described with reference to FIG. Fig.1 (a) is a side view of the pile driver 1 in one embodiment of this invention, FIG.1 (b) is sectional drawing of the pile driver 1 in the Ib-Ib line | wire of Fig.1 (a). It is.

  As shown in FIG. 1, the pile driving machine 1 mainly includes a vehicle body 10, a reader 20 supported by the vehicle body 10, and a work device 30 suspended from the leader 20. It is comprised so that the pile driving operation which drives a steel pipe pile, a concrete pile, etc. into the ground can be performed by raising / lowering along. Further, the pile driving machine 1 is configured so that the leader 20 can be raised and lowered with respect to the vehicle body 10 in order to ensure safety during traveling.

  The vehicle body 10 is a main body of the pile driving machine 1, and supports the upper turning body 11 on which various devices for performing the pile driving work are disposed, and supports the upper turning body 11 and the pile driving machine 1 travels. And a lower traveling body 12 configured as a traveling device for the above purpose.

  A bracket 13 is disposed on the front portion (left side in FIG. 1) of the vehicle body 10 (upper turning body 11), and a reader 20 is pivotally supported by the undulation shaft 14 on the bracket 13. A backstay cylinder 15 is disposed behind the bracket 13 (right side in FIG. 1), and the leader 20 is supported by the backstay cylinder 15 from the rear side (right side in FIG. 1).

  The backstay cylinder 15 is a cylinder for raising and lowering the leader 20 with respect to the vehicle body 10, and one end side (main body side) is connected to the vehicle body 10 (upper swing body 11) and the other end side (rod side). ) Is coupled to the reader 20. Therefore, when the backstay cylinder 15 is contracted, the leader 20 falls down to the rear side of the vehicle body 10 around the hoisting shaft 14. Further, when the backstay cylinder 15 is extended from the state in which the leader 20 is lying down, the leader 20 stands up with respect to the vehicle body 10 about the hoisting shaft 14.

  The leader 20 supports the working device 30, and a guide pipe 21 for supporting the working device 30 extends along the longitudinal direction (vertical direction in FIG. 1) at the front (left side in FIG. 1). Has been. The work device 30 is supported by the reader 20 by engaging a guide give 31 of the work device 30 to be described later with the guide pipe 21. In addition, sheaves 16 and 17 are disposed at the upper part (upper side in FIG. 1) of the reader 20 and at the substantially central part in the longitudinal direction, respectively. The sheaves 16 and 17 support and guide the hoisting rope 40 for suspending the working device 30, and the hoisting rope 40 is routed through the sheaves 16 and 17. In the present embodiment, the hoisting rope 40 is constituted by a wire rope formed by more matching steel wires.

  The work device 30 is a device for performing pile driving work, and is suspended from the leader 20 by a hoisting rope 40. A guide give 31 is disposed at the rear portion (right side in FIG. 1) of the working device 30, and the guide give 31 is engaged with the guide pipe 21 of the reader 20. Therefore, when the hoisting device 40 winds or sends out the hoisting rope 40, the working device 30 moves up and down along the guide pipe 21.

  The hoisting device 50 is for hoisting the working device 30 with the hoisting rope 40, and a hoisting drum 51 that winds and feeds the hoisting rope 40, and a drive mechanism that drives the hoisting drum 51 ( (Not shown), and is disposed at the rear portion (right side of FIG. 1) of the vehicle body 10 (upper turning body 11).

  By the way, when the leader 20 is laid down, if the hoisting rope 40 is not taken up by the hoisting drum 51, the hoisting rope 40 is slackened (see FIG. 4). Will be dragged to the ground. Further, when the leader 20 is erected, if the hoisting rope 40 is not sent out, the hoisting rope 40 is stretched, leading to damage to the leader 20 or cutting of the hoisting rope 40. For this reason, in the operation | work which raises / lowers the leader 20, the winding rope 40 must be wound up and sent out.

  Further, when the leader 20 is to be laid down, the hoisting rope 40 is not simply wound up. If the speed at which the leader 20 is lowered and the speed at which the hoisting rope 40 is taken up are not synchronized, the hoisting rope 40 It will cause the leader 20 to be damaged and the hoisting rope 40 to be cut. Similarly, when the leader 20 is erected, the speed at which the leader 20 is raised and the speed at which the hoisting rope 40 is sent out must be synchronized instead of simply sending out the hoisting rope 40.

  On the other hand, a rope support member 60 is disposed at the rear part (right side in FIG. 1) of the leader 20 in order to suppress the slack of the hoisting rope 40 that occurs when the leader 20 is laid down. In the present embodiment, the position of the rope support member 60 with respect to the longitudinal direction of the leader 20 is set to a position where the rope support member 60 and the vehicle body 10 do not interfere when the leader 20 is laid down (see FIG. 3 (b). ) And (c)).

  Here, with reference to FIG. 2, the detailed structure of the rope support member 60 is demonstrated. 2 (a) is a top view of the rope support member 60, and FIG. 2 (b) is a front view of the rope support member 60 as viewed in the direction of arrow IIb in FIG. 2 (a). These are the side views of the rope support member 60 in the arrow IIc direction view of Fig.2 (a).

  As described above, the rope support member 60 is for suppressing the slack of the hoisting rope 40 that occurs when the leader 20 is laid down. As shown in FIG. I have. As shown in FIG. 2C, the U-shaped member 61 is formed by forming a steel pipe into a substantially U shape, and fixing members 62 for fixing the U-shaped member 61 to the reader 20 are provided at both ends thereof. Are welded. As shown in FIG. 2A, a total of four bolt holes 62a are formed in the fixing member 62, and a U-shape is formed via the fixing member 62 by bolts or the like inserted through the four bolt holes 62a. The member 61 is fixed to the reader 20 (fixing portion 22) (see FIG. 1B).

  Thus, in a state where the U-shaped member 61 is fixed to the reader 20, the opening of the U-shaped member 61 is closed by the reader 20, and a closed space is formed between the U-shaped member 61 and the reader 20. The hoisting rope 40 is routed through the closed space (see FIG. 1B), and thus the hoisting rope 40 can be held in the closed space. Therefore, when the leader 20 is laid down, the hoisting rope 40 is hooked on the hooking portion 61a (the portion facing the opening) of the U-shaped member 61 (see FIG. 3). As a result, the hoisting rope 40 can be supported by the rope support member 60, and slackening of the hoisting rope 40 that occurs when the leader 20 is laid down can be suppressed.

  The pair of U-shaped members 61 are connected by a plurality of (six in the present embodiment) connecting members 63, and are arranged to face each other with a gap L as shown in FIG. Thereby, the hoisting rope 40 can be hung over a pair of U-shaped member 61 (holding part 61a), and the slack of the hoisting rope 40 can be suppressed further.

  The distance L between the pair of U-shaped members 61 is set to be larger than twice the minimum bending radius of the hoisting rope 40 (the minimum radius at which the hoisting rope 40 can be bent). As a result, the hoisting rope 40 can be pulled out from between the pair of U-shaped members 61 (the latching portions 61a), and the hoisting rope 40 can be pulled out, thereby further suppressing the loosening of the hoisting rope 40. can do.

  The minimum bending radius of the wire rope is generally about 10 times the diameter of the wire rope. In the present embodiment, the diameter of the hoisting rope 40 is 25 mm, so the interval L is 800 mm (> 25 mm). × 10 times × 2 times).

  Next, with reference to FIG. 3, the fixing method of the hoisting rope 40 in the pile driving machine 1 comprised as mentioned above is demonstrated. FIG. 3 is a process flow diagram showing an operation process of lying down the leader 20, in which the manner in which the leader 20 is fallen down and the hoisting rope 40 supported by the rope support member 60 is fixed is illustrated in time series. . 3 (a) to 3 (c) are side views of the pile driving machine 1, and FIG. 3 (d) is an enlarged view of the pile driving machine 1 shown by IIId in FIG. 3 (c). It is an enlarged side view. Further, in FIG. 3, for easy understanding of the drawing, reference numerals are given to only main components, and reference numerals of some components are omitted.

  In the operation of lying down the leader 20, first, as shown in FIG. 3A, the backstay cylinder 15 is contracted in a state where the working device 30 is positioned at the lower end of the leader 20, and the leader 20 is moved to the rear side of the vehicle body 10. Lay down to the right (Fig. 3).

  As a result, the hoisting rope 40 is slackened. However, when the leader 20 is laid down, the hoisting rope 40 is inevitably latched on the U-shaped member 61 (the latching portion 61a), and the rope support member 60 The hoisting rope 40 is supported (rope support process).

  That is, as described above, since the hoisting rope is routed through the closed space formed between the U-shaped member 61 and the leader 20 (see FIG. 1B), the leader 20 is laid down. Thus, the hoisting rope 40 is inevitably hooked on the U-shaped member 61 (the hooking portion 61a). Thereby, it is possible to save the labor of the operator having to hang the hoisting rope 40 on the U-shaped member 61 (holding portion 61a), and to improve workability.

  When the leader 20 is further laid down from the state shown in FIG. 3A and the leader 20 is laid down completely (in a state substantially parallel to the ground), as shown in FIG. As described above, the hoisting rope 40 is hooked on the U-shaped member 61 (the hooking portion 61a), and the hoisting rope 40 is supported by the rope support member 60. 40 slack can be suppressed.

  Next, as illustrated in FIG. 3C, the hoisting rope 40 that is hooked on the U-shaped member 61 (the hooking portion 61 a) and supported by the rope support member 60 is connected to the pair of U-shaped members 61 (the hooking). Pull out from between the portions 61a) (rope pulling step), and the pulled-up hoisting rope 40 is bound by the binding member 70 having a strength lower than that of the hoisting rope 40 (rope binding step).

  Thereby, since the hoisting rope 40 supported by the rope support member 60 can be bound and fixed by the binding member 70, slackness of the hoisting rope 40 can be reliably suppressed.

  Further, since the hoisting rope 40 supported by the rope support member 60 is pulled out from between the pair of U-shaped members 61 (holding portions 61a), the looseness of the hoisting rope 40 can be suppressed accordingly. As a result, as shown in FIG. 3B, even when the hoisting rope 40 is extremely slack and the hoisting rope 40 hangs down on the ground, it is possible to avoid dragging the hoisting rope 40 during traveling. it can.

  On the other hand, in the work of raising the leader 20, first, the binding member 70 is removed, and then the backstay cylinder 15 is extended to raise the leader 20 with respect to the vehicle body 10. Here, as described above, in the rope binding step, the hoisting rope 40 is bound by the binding member 70 having a lower strength than that of the hoisting rope 40. Therefore, the leader 20 is raised without removing the binding member 70. Even if the binding member 70 is broken, the hoisting of the hoisting rope 40 can be prevented, and damage to the leader 20 and the hoisting rope 40 can be avoided.

  As described above, according to the pile driving machine 1 according to the present embodiment, in the operation of lying down the leader 20, the winding rope 40 is not wound (that is, the winding rope 40 is in a state in which the winding rope 40 is sent out). The slack of the hoisting rope 40 can be suppressed. Thereby, dragging of the hoisting rope 40 during traveling can be avoided.

  Further, when the leader 20 that has been laid down is erected, the hoisting rope 40 has already been sent out, so that the hoisting rope 40 can be lifted without the hoisting rope 40 being sent out in the work of erecting the leader 20. Damage to the leader 20 and cutting of the hoisting rope 40 can be avoided without the 40 being stretched.

  Thus, in the operation of raising and lowering the leader 20, it is not necessary to wind and feed the hoisting rope 40, and the speed for raising and lowering the leader 20 is synchronized with the speed for taking up and feeding the hoisting rope 40. Since it is not necessary, it is possible to save work and improve workability.

  As described above, the present invention has been described based on the embodiments, but the present invention is not limited to the above-described embodiments, and various improvements and modifications can be easily made without departing from the spirit of the present invention. It can be guessed.

  For example, the numerical values given in the above embodiment are merely examples, and other numerical values can naturally be adopted.

  In the said embodiment, although the case where the U-shaped member 61 of the rope support member 60 was comprised in substantially U shape was demonstrated, it is not necessarily restricted to this, For example, it comprises in substantially L shape or a single character shape. You may do it. In this case, unlike the case where the U-shaped member 61 is configured to be substantially U-shaped, a closed space is not formed between the reader 20 and the operator 20 when the reader 20 is laid down. The slack of the hoisting rope 40 can be suppressed by hooking the hoisting rope 40 on the U-shaped member 61 that is configured in a substantially L shape or a single character.

  In the said embodiment, although the case where the rope support member 60 was comprised including a pair of U-shaped member 61 (holding part 61a) was demonstrated, it is not necessarily restricted to this, For example, one or Three or more U-shaped members 61 may be provided. When the U-shaped member 61 is configured by one, the material cost and the manufacturing cost of the rope support member 60 can be reduced, and when the U-shaped member 61 is configured by three or more, the hoisting is performed. The slack of the rope 40 can be further suppressed.

(A) is a side view of the pile driver in one embodiment of the present invention, and (b) is a cross-sectional view of the pile driver along line Ia-Ia in FIG. 1 (a). (A) is a top view of a rope support member, (b) is a front view of the rope support member as viewed in the direction of arrow IIb in FIG. 2 (a), and (c) is a view in FIG. 2 (a). It is a side view of a rope support member in the arrow IIc direction view. It is a process flow diagram which shows the operation | work process which makes a leader fall down. It is a side view of the conventional pile driver.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Pile driver 20 Leader 30 Working apparatus 40 Hoisting rope 60 Rope support member 61 U-shaped member 61a Hanging part 70 Bundling member L Space | interval

Claims (6)

A leader that is supported so as to be raised and lowered and on which a working device for performing a pile driving work is suspended, and a hoisting rope that is routed through the leader to suspend the working device on the leader are provided. In the pile driver,
A rope support member disposed on the leader and having a latching portion for latching the hoisting rope;
A pile driving machine configured to be able to support the hoisting rope by the rope support member by hooking the hoisting rope to the hooking portion when the leader is laid down.   The said rope support member forms the space closed between the said latching | locking part and the said leader, The said hoisting rope is routed through the closed space. Pile driver.   The rope support member has a plurality of the latching portions, the plurality of latching portions are arranged at intervals, and the interval has a minimum bending radius that is a minimum radius at which the hoisting rope can be bent. The pile driver according to claim 1 or 2, wherein the pile driver is set to be larger than twice. A leader that is supported so as to be able to undulate and a work device for performing a pile driving work is suspended, a hoisting rope that is routed through the leader to suspend the work device on the leader, and the leader In the fixing method of the hoisting rope in the pile driving machine provided with a rope support member having a hooking portion for hooking the hoisting rope,
A rope support step of hooking the hoisting rope on the hooking portion and supporting the hoisting rope by the rope support member in a state where the leader is lying down,
A method of fixing the hoisting rope, comprising: a rope binding step of binding the hoisting rope supported by the rope support member in the rope supporting step with a binding member having a lower strength than the hoisting rope. . The rope support member forms a closed space between the hooking portion and the leader, and the hoisting rope is routed through the closed space,
5. The hoisting rope according to claim 4, wherein the rope supporting step is performed by inevitably being hooked on the hooking portion when the leader is laid down. 6. Fixing method. The rope support member has a plurality of the latching portions, the plurality of latching portions are arranged at a predetermined interval, and the predetermined interval is a minimum bend that is a minimum radius at which the hoisting rope can be bent. It is set larger than twice the radius,
The support of the hoisting rope according to claim 4 or 5, further comprising a rope pulling step for pulling out the hoisting rope supported by the rope support member in the rope supporting step from between the hooking portions. Method.

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