JP2002242181A - Elevating vibration-preventing apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an elevating vibration-preventing apparatus which eliminates useless strokes of an operating machine. SOLUTION: The elevating vibration-preventing apparatus 1 is comprised of a pair of guide members 2, 2, and guide gibs 5. Each guide member 2 holds a pile 100 in order to prevent core vibration of the pile 100 when it is rotatively press-fitted, and it is rendered openable in order to avoid interference thereof when a blade 100n arranged on the pile 100 passes therethrough. The guide gibs 5 each slidably grip a guide rod 112 of a leader 111. Then, the apparatus 1 is hung from the operating machine which rotatively press-fits the pile 100, and descends along the leader 111 together with the operating machine. The elevating vibration-preventing apparatus 1 thus constructed is comprised of support means 13 which render the guide gibs 5 openable, and allow the guide gibs 5 to be supported by the leader 111 at a lower limit location when the guide gibs descend along the leader 111.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anti-sway device for preventing run-out of a pile core during rotary press-fitting of a pile,
In particular, the present invention relates to an anti-sway device that can move up and down along with a work machine along a leader corresponding to a pile having a plurality of blades.

[0002]

2. Description of the Related Art In a steel pipe press-fitting method for driving a foundation pile, an auger is attached to a leader erected on a pile driver body so as to be able to move up and down, and a steel pipe pile connected to the auger is pressed while rotating. Go. In such a case, a steadying device for guiding the steel pipe pile is provided at the lower end of the leader in order to prevent the pile core from swaying and to make the steel pipe pile excavate straight. The steady rest has a guide member fixed to the lower end of the leader and lightly holding the steel pipe pile, and the guide member has a structure that can be opened and closed right and left so as to hold the steel pipe pile. On the other hand, steel pipe piles
There are two types, one mainly having a blade at the lower end for obtaining propulsion during excavation, and the other having a plurality of blades to be more stable as a foundation pile when driven in addition to the propulsion.

In the case of the former steel pipe pile, once the steady rest holds the pile, the blades do not interfere with the steady rest thereafter. Since the guide member passes through the steady rest device, the guide member must be opened and closed each time. Particularly, when the number of blades is large and the shaft portion is short, the guide member cannot function as the steady rest device. Therefore, as a device corresponding to a steel pipe pile having a plurality of blades, a lifting and lowering steady rest device capable of moving up and down along a leader together with a work machine has been conventionally used. Here, FIG. 9 is a diagram illustrating a pile driver equipped with a conventional elevating steady rest device. And the steel pipe pile 100 mentioned in this example has a total of four blades 100a-
100d.

[0004] A pile driver 110 is provided with an erect leader 111.
An auger 120 is mounted as a working machine on the steel pipe pile 100.
Are connected so as to receive rotational drive from the auger 120. The lifting and lowering device 130 for guiding the steel pipe pile 100 has a guide gib 131 and an auger 120.
The guide rod 112 is slidably gripped like the guide gib 121 of FIG. And the chain 12 under the auger 120
5 so that it can descend in synchronization with the auger 120. This elevating steady rest 130 is
Even if the steel pipe pile 100 is supported at an excessively high position, the guide effect does not work, and the steel pipe pile 100 will run out of center. For this reason, it is preferable that the middle point of the steel pipe pile 100 is lower than the middle point. As shown in the figure, the lifting and lowering steadying device 130 is arranged between the second to third blades 100b and 100c from the bottom.

[0005] When the auger 120 is driven to rotate the steel pipe pile 100, the steel pipe pile 100 excavates into the ground by the propulsive force of the blades 100a. The auger 120 also descends in accordance with such excavation of the steel pipe pile 100, and the lifting and lowering device 130 suspended from the auger 120 also descends. However, the lifting and lowering device 130 can only descend to a position where it hits the stopper 113 at the lower end of the leader 111, and thereafter guides the steel pipe pile 100 at the same height as the fixed one. At this time, the chain 125 from which the lifting and lowering device 130 is suspended is stored in the chain box 132 on the lifting and lowering device 130.

When the steel pipe pile 100 is further excavated, the lifting and lowering device 130 is kept as it is while the shaft between the blades 100b and 100c passes, and the blade 100c
When it comes down to a position where it interferes with the steadying device 130, the guide member is opened to avoid interference with the blade 100c. Thereafter, the guide member is left open.
This is because if the steel pipe pile 100 enters the ground to some extent, it is not necessary to consider the runout. Therefore, according to the lifting and lowering device 130, the plurality of blades 100 a to 100 a
Even in the case of the steel pipe pile 100 having 0d, the swing of the pile core can be prevented without repeatedly opening and closing the guide member.

[0007]

However, when such a lifting and lowering device 130 is used, an auger 12 is required.
There is a problem that the lowering of 0 is limited by the lifting and lowering device 130, and the driving amount of the steel pipe pile 100 is reduced accordingly. This is because the lifting and lowering device 130 grasps the guide rod 112 and moves up and down similarly to the auger 120, so that the guide give 121 of the auger 120 is used.
Abuts on the guide gib 131 of the lifting and lowering device 130 at the lower end portion of the reader 111, and the auger 120
This makes it impossible to obtain a stroke that can be lowered. And this was disadvantageous in the following points.

[0008] Depending on the construction conditions, for example, the upper end portion of the steel pipe pile 100 that has been rotationally press-fitted may be protruded from the ground,
The protruding portion may be cut in accordance with the height of the ground. However, at this time, if the amount of protrusion of the pile increases because the amount of driving is insufficient, post-processing such as driving and cutting is required to adjust the height, and the number of construction steps increases. In addition, since the protruding amount is large, the cut portion of the steel pipe pile 100 is long, and it is preferable that the steel pile 100 is deeply cast as a foundation pile. However, the length of the steel pipe pile 100 buried in the ground is shortened accordingly. Would. Accordingly, it is desired that the stroke of the auger 120 can be sufficiently utilized and the stake can be lowered to the lower end of the leader 111 even when the lifting and lowering device 130 is used.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a lifting and lowering steadying device in which a stroke of a working machine such as an auger for lifting and lowering a reader is eliminated.

[0010]

SUMMARY OF THE INVENTION According to the present invention, there is provided a lifting and lowering device for holding a pile in order to prevent the core from swaying at the time of rotary press-fitting, and to avoid interference when a blade provided on the pile passes. A stake having a pair of openable and closable guide members and a guide gib slidably gripping a guide rod of the leader, which is hung from a working machine for rotationally press-fitting the stake, and which can be lowered with the working machine along the leader A device for raising and lowering a hitting machine, wherein the guide gib is provided so as to be openable and closable, and has a support means for supporting the leader at a lower limit position lowered along the leader.

Further, in the lifting and lowering device according to the present invention, the support means has a fitting hole formed in the device main body, and a fitting rod erected on the reader side is inserted into the fitting hole. Are fitted and supported. Further, the lifting and lowering device according to the present invention holds the guide rod by inserting a fixing pin by overlapping a positioning hole formed in the guide gib with a positioning hole formed in the apparatus main body side. The guide gib is fixed between a closed state and an opened state after being removed from the guide rod.

Therefore, according to the present invention, it is possible to avoid interference with the guide give of the working machine by removing the guide give from the guide rod of the leader, and it is possible to further lower the work machine to the lower end of the leader. became. Therefore, it was possible to eliminate the waste of the stroke of the working machine caused by the guide gib of the lifting and lowering device. Further, with a simple configuration in which the fitting rod is inserted into the fitting hole, the lifting and lowering anti-sway device can be supported on the reader side even when the guide gib is removed from the guide rod. Further, by a simple operation by replacing the fixing pin, the guide gib can be used as a normal guide gib, and the guide gib can be retracted in an open state.

[0013]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a first embodiment of the present invention. FIG. 1 is a plan view of a lifting and lowering anti-vibration device according to the present embodiment at the time of guide, and FIG. 2 is a plan view of the device at the time of non-guide. FIG. 3 is a side view at the time of a guide showing the lifting and lowering anti-vibration device located at the lower end of the reader.
FIG. 4 is a front view of the same position when not guiding. The lifting and lowering device 1 according to the present embodiment includes an auger 12 mounted on a reader 111 as in the conventional example shown in FIG.
0 is suspended by a chain 125 (see FIG. 5). The auger 120 has a plurality of blades 100n (n =
The steel pipe pile 100 provided with a, b, c, and d) is connected.

The lifting and lowering device 1 is provided with such a steel pipe pile 1.
Opening and closing guides 2 and 2 are provided as guide members for preventing the run-out of the core 00. The opening and closing guides 2 and 2 also have a structure that can be opened and closed right and left so that the steel pipe pile 100 can be held and released. . The opening and closing guides 2, 2 are symmetrical and have a guide surface 2 having a curvature according to the diameter of the steel pipe pile 100.
a. 2a, and is designed to be lightly held so that a slight gap is provided between the steel pipe pile 100 and the holding state in which the steel pipe pile 100 is held as shown in FIG. The opening and closing guides 2, 2 are pivotally supported by support brackets 3, 3 of the apparatus main body 10, and are swingably attached.

The opening and closing guides 2, 2 are fixed pins inserted into the positioning holes 2b, 2b (see FIG. 2) at both ends so as not to open while holding the steel pipe pile 100 as shown in FIG. 21. on the other hand,
When the blade 100n passes through the lifting and lowering device 1, it is necessary to retract the opening / closing guides 2 and 2 from the interference range with the blade 100n indicated by a two-dot chain line in FIGS. Therefore, the lifting and lowering device 1 can fix the opening and closing guides 2 in an open state as shown in FIG.
Positioning holes 2c, 2c and positioning holes 3a, 3a formed in the opening and closing guides 2, 2 and the support brackets 3, 3 (FIG. 1)
), And the fixing pins 22, 22 are inserted therein to be fastened.

Next, as described above, the up-and-down anti-sway device 1 also has a configuration capable of moving up and down along the leader 111 of the pile driver in this embodiment. The reader 111
As shown in FIG. 1, the cross-section is a cylindrical body having a substantially square cross section, and guide rods 112, 112 are welded to two corners at the front thereof over the entire length of the reader to be integrated. The lifting and lowering device 1 is disposed in front of the leader 111 and provided with guide gibs 5 and 5 for gripping the guide rods 112 from both outer sides. As shown in FIG. 3, the guide gibs 5 and 5 are formed to be taller than the apparatus main body 10 in order to support a moment due to the weight of the lifting and lowering anti-vibration device 1. Therefore, the lowering of the auger is limited by the height of the guide gibs 5 and 5,
If the steady rest device 140 is used, the stroke of the lower end portion which can be lowered is wasted. Note that the steady rest device 140 is, as shown partially in FIG.
A lower end of the projection 11 projects forward from a stopper 113.

Therefore, in the present embodiment, the lifting and lowering anti-vibration device 1 that hinders the descending path so that the auger can further descend.
The guide gibs 5, 5 can be detached from the guide rods 112, 112. Specifically, the guide gibs 5, 5 of the lifting and lowering anti-vibration device 1 can be opened and closed similarly to the opening and closing guides 2, 2. Guide give 5 and 5 are opening and closing guide 2,
The shaft 2 is coaxially supported by the support brackets 3 and 3 and is swingably mounted. The positioning holes 5c, 5c for positioning the guide gibs 5, 5 at the opened and closed positions are also provided.
When the guide rods 112 are gripped, the fixing pins 2 are positioned at positions overlapping the positioning holes 3b, 3b (see FIG. 2) of the support bracket 3 as shown in FIG.
2, 22 can be inserted and fastened. On the other hand, when it is opened, as shown in FIG. 2, the fixing pins 22, 22 are inserted and fastened at positions overlapping the positioning holes 3a, 3a (see FIG. 1) of the support brackets 3, 3. ing.

As shown in FIGS. 3 and 4, the lifting and lowering device 1 suspended on the auger 120 has a chain box 11 for accommodating a chain 125 on a central upper surface of the apparatus body 10. Mounting bracket 12 erected in
Is connected to the chain 125. Fitting holes 13 that penetrate the device body 10 up and down are formed at two places with the mounting bracket 12 interposed therebetween. On the other hand, the reader 111
The fixed steady rest device 140 at the lower end is provided with two fitting rods 1 at positions overlapping with the fitting holes 13, 13 of the elevating steady rest device 1.
5, 15 are erected vertically. Further, the fitting rod 15,
A flange 15a for receiving the apparatus main body 10 is welded to 15. Therefore, the fitting holes 13, 13 are fitted into the fitting rods 15, 15, and the apparatus main body 10 rides on the collar 15a, so that the lifting and lowering anti-vibration device 1 is supported on the reader 111 side.

Next, the operation of the lifting and lowering device 1 having such a configuration will be described. 5 to 8 are views showing a driving process of the steel pipe pile 100. First, FIG.
The auger 12 located above the reader 111 as shown in FIG.
0 is connected to the steel pipe pile 100. At this time, the lifting and lowering device 1 holds the guide rod 112 by the closed guide gibs 5 and 5 (see FIG. 1), and is capable of ascending and descending along the leader 111, and the chain 125 suspended from the auger 120. Hanged by. Steel pipe pile 10
When connecting 0 to the auger 120, the opening and closing guides 2, 2
Are spread right and left as shown in FIG. 2 to avoid interference with the steel pipe pile 100. Then, the steel pipe pile 1 is attached to the auger 120.
After connecting 00, the opening and closing guides 2 and 2 are closed as shown in FIG. 1 and the shaft of the steel pipe pile 100 is lightly held. Also in the case of this example, a case where the steel pipe pile 100 has four blades 100a to 100d will be described. Therefore, as shown in FIG. 5, the lifting and lowering device 1 includes the second and third blades 100b, 1b.
00c.

Then, the auger 120 is driven to drive the steel pipe pile 1
When rotation is given to 00, the steel pipe pile 100 excavates into the ground as shown in FIG. 6 by the propulsive force of the blade 100a. The auger 120 descends according to the excavation of the steel pipe pile 100, and the elevating steadying device 1 suspended on the auger 120 also descends along the leader 111. Since the lifting and lowering device 1 does not laterally shift due to the guide gibs 5 and 5 while descending in this manner, the guide surface 2
The center runout of the steel pipe pile 100 surrounded by a and 2a is reliably prevented (see FIG. 1). Then, the lifting and lowering anti-sway device 1 that has descended to the lower end of the leader 111 is stopped at a position where it hits the brim 15a (see FIG. 6), and thereafter the steel pipe pile 100 is prevented from oscillating in the stopped state.

The lifting and lowering device 1 is positioned just above the blade 100b and stopped by the excavation of the steel pipe pile 100 until it is stopped by the flange 15a (see FIG. 6). Therefore, even after the descent is stopped, the next blade 11
Until 1c comes down, keep the steel pipe pile 100 as it is.
Can guide you. Then, as shown in FIG. 7, when the steel pipe pile 100 has excavated until the blade 100 c passes through the elevating and steadying device 1, the auger 120 is temporarily stopped, and the opening / closing guides 2, 2 and the guide gibs 5, 5 are both shown in FIG. 2. Open as shown. At this time, the lifting and lowering device 1
Is the fitting hole 1 of the apparatus main body 10 when hitting the collar 15a.
Since the fitting rods 15, 15 pierce the fittings 3, 13, the fitting is performed.
It is supported on one side.

In order to open the opening / closing guides 2, 2 and the guide gibs 5, 5, the fixing pins 21, 22, 22 are removed so as to be swingable. The fixing pins 22, 22 are inserted with the positioning holes 2c, 2c, 5a, 5a superimposed on each other. As a result, the opening / closing guides 2 and 2 and the guide gibs 5 and 5 are fixed in an open state, and the blade 1 located above the vertical
00c and 100d can be passed. Ogre 1
The path for the 20 guide gibs 121 to slide down the guide rod 112 can be opened. Once the opening / closing guides 2 and 2 and the guide gibs 5 and 5 are once opened during the passage of the blades 111c, the up-and-down steadying device 1 continues driving the steel pipe pile 100 in that state thereafter. This is because the steel pipe pile 100 is supported by the ground if it enters the ground to some extent, so that it is not necessary to perform steadying.

Then, the auger 120 is driven again, and the steel pipe pile 100 is further excavated and buried in the ground as shown in FIG. FIG. 8 shows a final driving state by the auger 120, in which the auger 120 is lowered to the lower limit position. At this time, the guide gibs 5, 5 of the lifting and lowering device 1 are located outside the auger 120, and the chain box 11 enters the auger 120 to avoid interference with the auger 120. In the lifting and lowering device 1 according to the present embodiment, by avoiding the interference in this way, the guide give 121
It is possible to lower the auger 120, which has no obstruction to the course, further downward.

Specifically, in the prior art, the auger 120 could not be lowered any more because it hit the guide gib 5 of the up-and-down anti-vibration device 1 at the height Y1, but in the present embodiment, the auger 120 was lowered to the height Y2. Is now available. Therefore, a working machine such as the auger 120 is connected to the reader 1
When descending along 11, the waste of the stroke at the lower end portion of the reader 111 could be eliminated. And
As a result, inconveniences such as no need for re-drive due to insufficient driving of the pile, and an increase in the length of the cut portion of the pile and a reduction in the driving amount are solved.

If the guide gibs 5 are removed, the support of the steadying device 1 is lost.
The lifting and lowering device 1 can be supported by the reader 111 with a simple configuration in which the fitting rods 15 and 15 are inserted into the 13. Further, the guide gibs 5, 5 are connected to the guide rod 11 by a simple operation by replacing the fixing pins 22, 22.
2, 112 can be slidably gripped and function, and can be in a retracted state in an open state.

The embodiment of the lifting and lowering device has been described above. However, the present invention is not limited to the above-described embodiment, and various changes can be made without departing from the spirit of the invention. For example, in the embodiment, the fitting rod is stabbed in the fitting hole of the steadying device so that the steadying device is supported even when the guide gib is removed.
Conversely, a fitting rod may be provided on the steadying device, or the steadying device may be supported by the reader by another supporting means.

[0027]

According to the present invention, since the guide gib is provided so as to be openable and closable and has a support means for supporting the leader at the lower limit position lowered along the leader, the stroke of the working machine such as an auger for raising and lowering the leader is provided. It has become possible to provide an elevating steady rest device that eliminates waste.

[Brief description of the drawings]

FIG. 1 is a plan view of a lifting and lowering anti-sway device during a guide.

FIG. 2 is a plan view showing the lifting and lowering device in a non-guide state.

FIG. 3 is a side view at the time of a guide positioned at a lower end of a reader showing the lifting and lowering device.

FIG. 4 is a front view of the non-guided state, which is located at a lower end of the reader, showing the lifting and lowering device.

FIG. 5 is a diagram showing a pile driver before the press-fitting of the pile driving machine equipped with the elevating steady rest device.

FIG. 6 is a diagram showing a pile driving machine equipped with an up-and-down steady rest device during rotary press-fitting.

FIG. 7 is a diagram showing a pile driving machine equipped with a lifting and lowering steadying device during rotary press-fitting.

FIG. 8 is a view showing the lifting and lowering device in a state where the auger is lowered to a lower limit position.

FIG. 9 is a view showing a pile driver equipped with a conventional elevating steady rest device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Elevating anti-sway device 2 Opening / closing guide 3 Support bracket 5 Guide gib 13 Fitting hole 15 Fitting rod 100 Steel pipe pile 110 Pile driver 111 Leader 112 Guide rod 120 Auger 100n Blade

Claims (3)

[Claims] A pair of guide members that hold the pile to prevent run-out of the pile during rotary press-fitting, and that can be opened and closed to avoid interference when a blade provided on the pile passes.
A guide gib slidably gripping a guide rod of the leader, a lifting device for a pile driver that is hung from a working machine that rotationally press-fits the pile and that can be lowered along with the working machine along the leader. An elevating and lowering anti-vibration device comprising: a guide means provided so as to be openable and closable, and supporting means for supporting the reader at a lower limit position lowered along the reader. 2. The up-and-down stabilization device according to claim 1, wherein the support means has a fitting hole formed in the apparatus main body, and allows a fitting rod erected on a reader side to be inserted into the fitting hole. A lifting and lowering steadying device, wherein the device main body is fitted and supported. 3. The lifting and lowering device according to claim 1, wherein a positioning pin formed in the guide gib and a positioning hole formed in the apparatus body are overlapped with each other and a fixing pin is inserted. The lifting and lowering anti-vibration device is characterized in that the guide gib is fixed between a state where the guide rod is gripped and closed and a state where the guide gib is opened and removed from the guide rod.