JPH0330426Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a backstay guide device for a pile driver, and more specifically, the present invention relates to a backstay guide device for a pile driver, and more specifically to a backstay guide device suspended from a leader when the leader and backstay device of a pile driver are assembled. A pile driver is used to guide the backstay device so that it does not interfere with the sides of the pile driver's lower running body or upper revolving body when pulling the catch into the mounting device set on the rear beam via the pull-in wire. This invention relates to a backstay guide device for a machine.

[Background of the idea]

FIG. 1 shows an example of a pile driver and the leader and backstay device that constitute this pile driver being assembled.

The pile driver shown in FIG. 1 includes a lower running body 1,
An upper rotating body 2, a leader 3 connected to a front bracket 2' of the upper rotating body 2 via a pin 4, a set of two backstay devices 5 supporting this leader 3, a rear beam 12, and a backstay. Pull-in sheave 1 used when assembling device 5
It is equipped with 5, 16 mag. The backstay device 5 includes a support 6 connected to the leader 3 via a pin 7, and a hydraulic cylinder 8 connected to the support 6.
The rod 9 fitted into the hydraulic cylinder 8 is connected via a spherical body 10 provided at the lower end of the rod 9, and is attached to a mounting position set on the rear beam 12 with a bolt (not shown). It has a catch seat 11. The retraction sheave 15 is supported by a bracket 13 attached to the rear beam 12, and the retraction sheave 16 is supported by a bracket 13 attached to the rear beam 12.
is supported by a bracket 14 attached to the front end of the revolving upper structure 2.

When assembling the leader 3 of the pile driver and the backstay device 5, the base of the leader 3, which is supported almost horizontally on the ground, is connected to the front end of the upper revolving structure 2 on the ground with a pin 4, and the base of the leader 3 is connected to the leader 3. The backstay device 5 is connected by a pin 7. Then, the lead-in wire 17 is connected to the lower end of the backstay device 5.
and this lead-in wire 17
Pull in the middle and pass it over sheaves 15 and 16,
Furthermore, the wire 17 is passed over a pull-in sheave (not shown) provided at the upper end of the leader 3, and the other end of the pull-in wire 17 is wound around a winch (not shown) provided in the upper revolving structure 2. .

Then, the leader 3 is raised by a winch other than the winch for the pull-in wire or a crane truck (none of which is shown), the pull-in wire 17 is wound up, and the seat 11 of the backstay device 5 is moved to the rear beam 12. While pulling it upward, guide the seat 11 to the mounting position set on the rear beam 12, connect it to this mounting position with a bolt (not shown), assemble the backstay device 5, and use the backstay device 5 to attach the leader 3. support.

By the way, when a set of two backstay devices 5 are assembled, they are suspended from the leader 3 via pins 7 in an inverted V shape when viewed from the back. Therefore, when assembling the backstay device 5, if the lower end is simply pulled into the rear beam 12 side with the pulling wire 17, it will interfere with the side of the lower traveling structure 1 and the side of the upper revolving structure 2, and the lower end will interfere with the upper revolving structure 2. 2 or backstay 5.

Therefore, a backstay retraction device as shown in FIG. 3 has been proposed.

In the backstay retraction device shown in FIG. 3, a lever link 19 having a backstay receiver 18 is rotatably attached to the outer side of the upper revolving body 2 by a pin 20, the backstay device 5 is received by the backstay receiver 18, and the lever Link 1
9 to push the backstay device 5 outward and guide it rearward (Utility Model No. 58-
(See Publication No. 172543).

However, this conventional technique has the following drawbacks.

(1) The backstay device 5 is suspended from the leader 3 via a pin 7 in an inverted V shape, and rotates about the pin 7 as a fulcrum. Therefore, as in the prior art, when the lever link 19 with a constant length l is pulled from the front to the rear of the pile driver at a constant rotation radius, the lever link 19 is extremely Since a large compressive load is applied, the lever link 19 needs to be made quite strong.

(2) Since the backstay receiver 18 provided on the lever link 19 receives the backstay device 5 with a simple U-shaped groove,
When guiding the backstay device 5 from the front to the rear of the pile driver, there is a risk that the backstay device 5 will come off from the backstay receiver 18 and the backstay device 5 will collide with the pile driver, resulting in a serious accident.

(3) Since the lever link 19 is provided on the outside of the revolving upper structure 2, the lever link 19 protrudes outside when the revolving upper structure 2 is transported, and it is necessary to take out the lever link 19, which requires a lot of effort. Moreover, it may get in the way of the pile driver's actual work.

[Purpose of invention]

The purpose of the present invention is to eliminate the drawbacks of the prior art, to absorb the load applied to the lever link when assembling the backstay device, to securely hold the backstay device so that it does not separate from the lever link, and to allow the backstay device to be held firmly at the bottom when not in use. To provide a backstay guide device for a pile driver that can be stored so as not to protrude from the outside of a traveling body.

[Summary of the idea]

The present invention has a lever link that is rotatably attached to the outer side of the frame of the lower traveling body of the pile driver and that is configured to be extendable and retractable and that pushes the backstay device outward. The present invention is characterized in that it is provided with a holder that can surround and grip the outer periphery of the lower end of the backstay device, and that the lever link can be stored so as not to protrude from the side of the lower traveling body. , With this configuration, all of the above objectives can be achieved.

[Example of idea]

An embodiment of the present invention will be described below with reference to FIGS. 3 and 4.

These figures show only one of the left and right lower traveling bodies 1, and a lever link bracket 21 is attached to a side frame 1a serving as a frame of the lower traveling body 1. The bracket 21 is moved in the width direction of the undercarriage 1 as shown by arrow a in FIG. Possibly installed. A universal link 25 is connected to the outer side of the bracket 21.

The universal link 25 is connected in the longitudinal direction of the pile driver through a connecting structure in which a pin 27 is inserted between a first fork end 26 provided on the universal link 25 and a first I end 24 provided on the bracket 21. is rotatably coupled to. A lever link 29 is connected to this universal link 25.

The lever link 29 is connected to the first and second members 2
9a and 29b. The first member 29a is formed hollow, and the second member 29b
is inserted into the first member 29a,
The lever link 29 has first and second members 29
It is configured to be extendable and retractable as shown by arrow b in FIG. 4 via a and 29b. Furthermore, the first member 29a has a second I end 3 provided thereon.
0 and a second fork end 28 provided on the universal link 25 through a coupling structure in which a pin 31 is inserted, the universal link 25 is rotatably coupled in the vertical direction. Further, a holder 33 for a backstay device is connected to the tip of the second member 29b, which is the tip of the lever link 29.

The holder 33 has a third I provided thereon.
The end 34 and the third fork end 32 provided at the tip of the second member 29b of the lever link 29 are coupled to each other so as to be rotatable in a horizontal plane by a coupling structure in which a pin 35 is inserted. Furthermore, this holder 33 is configured in an annular shape by a holder main body 33a and a holder lid body 33b. One end of the holder lid 33b is connected to one end of the holder main body 33a via a pivot pin 36, and the other end of the holder lid 33b is connected to the other end of the holder main body 33a via an insertion/removal pin 37. The holder lid body 33b is configured to be able to open and close using the pivot pin 36 as a fulcrum when the insertion/removal pin 37 is pulled out.

In addition, in FIGS. 3 and 4, 1b indicates the endless track of the undercarriage.

Also, in Figure 4, of the left and right lower running bodies,
Although only the backstay guide device on one undercarriage side is shown, the backstay guide device on the other undercarriage side is constructed symmetrically to that shown in FIG. 4.

Furthermore, in FIG. 3, the same members as those of the pile driver shown in FIG. 1 are designated by the same reference numerals, and further explanation thereof will be omitted.

The backstay guide device of the above embodiment is used and operates as follows.

That is, when assembling the backstay device 5, the bolts 23 fixing the lever link bracket 21 are loosened, and the bracket 21 is attached to the lower traveling body 1.
2, and tighten the bolt 23 to fix it.

Next, the lever link 29 is rotated slightly from the stored state shown by the imaginary line in FIG. 4 using the pin 27 at the base of the lever link 29 as a fulcrum, and the insertion/removal pin 37 fixing the holder cover body 33b is pulled out. The holder lid 33b is opened and the lever link 29 is rotated to grip the backstay device 5 which is suspended from the leader 3 and is located at position A in front of the outer side of the lower traveling body 1.

Then, the lower end of the backstay device 5, that is, the rod 9, is fitted into the holder main body 33a, the holder lid 33b is closed, the insertion/removal pin 37 is inserted, and the holder 33 surrounds the outer periphery of the backstay device 5 and grips it.

As a result, the backstay device 5 is attached to the holder 33.
It can be held securely so that it does not come off.

Furthermore, as shown in FIG. 3, one end of the pull-in wire 17 is coupled to the lower end of the backstay device 5, and the pull-in wire 17 is wound up using a winch.

In this way, when the backstay device 5 is connected to the lever link 29 via the holder 33 and the backstay device 5 is towed from the front to the rear of the undercarriage 1 via the pull-in wire 17, the lever link 29 is connected to the base pin. 27 as a fulcrum, it rotates from the A position shown in FIG. 4 to the C position and then to the B position.
Further, when the lever link 29 moves from the A position to the C position, it gradually contracts from the extended state and is minimized at the C position, and when it moves from the C position to the B position, it gradually extends from the contracted state. Furthermore, since the lever link 29 is in the A position and the backstay device 5 is extended in the vertical direction, the universal link 29 is
5 and the lever link 29.
As the backstay device 5 is moving from position A to position C, as the backstay device 5 is contracted,
The backstay device 5 rotates upward using the pin 31 as a fulcrum, and in the process of moving from position C to position B, as the backstay device 5 extends again, it rotates downward using the same pin 31 as a fulcrum. move. During this time, the lever link 29 moves along the trajectory 38 shown in FIG. It is guided to the rear of the lower traveling body 1.

As a result, the lever link 29 absorbs the load accompanying the horizontal movement of the backstay device 5 and the vertical expansion and contraction, and can smoothly guide the lower end of the backstay device 5 toward the rear beam 12.

The pull-in wire 17 cooperates with the lever link 29 to guide the catch 11 at the lower end of the backstay device 5 to the mounting position set on the rear beam 12, and then attach the catch 11 to the rear beam 12 with a bolt (not shown). ).

After the backstay device 5 is guided by the lever link 29, the insertion/removal pin 37 that fixes the holder lid 33b is pulled out, the holder lid 33b is opened, the lever link 29 is contracted, and the holder lid 33a is inserted into the backstay device. 5, close the holder lid body 33b again, and then move the lever link 29 to the lower traveling body 1 using the pin 27 at the base as a fulcrum.
The lever link bracket 21 is rotated to the front side, and the bolt 23 fixing the lever link bracket 21 is loosened, as shown by the imaginary line in FIG.
is pushed toward the inside of the undercarriage 1, and then the lever link 29 is placed along the side of the undercarriage 1 as shown by the imaginary line in FIG. The lever link 29 is rotated and stored inside the traveling body 1.

Thereby, the lever link 29 can be stored so as not to protrude from the outer side of the lower traveling body 1 and become a hindrance during transportation of the lower traveling body 1.

In addition, in the present invention, it is not necessary to attach the bracket 29 for the lever link so that it can move in the width direction of the lower traveling body 1, or to configure the holder 33 so that it can rotate independently in a horizontal plane. Any configuration may be used as long as the lever link 29 can be accommodated so as not to protrude to the outside of the traveling body 1.

Also, the lever link 29 is connected to the first and second members 2.
The structure is not limited to the illustrated embodiment in which 9a and 29b are combined, but may be constructed by combining three or more members.

Further, the lever link 29 does not necessarily have to be configured to be vertically rotatable, and may be configured such that the lower end portion of the backstay device 5 slides in the vertical direction within the holder 33 when the backstay device 5 is extended or contracted.

[Effect of idea]

According to the present invention described above, a lever link that is configured to be extendable and retractable and that pushes the backstay device outward is rotatably attached to the outer side of the frame of the lower traveling body, and in the process of guiding the backstay device, the lever link When an unreasonable load is applied,
Since the lever link expands and contracts to absorb the energy, there is an effect that the backstay device can be reliably guided along a trajectory that does not interfere with the lower traveling body or the upper rotating body without making the lever link rigid.

Furthermore, according to the present invention, a holder is provided at the tip of the lever link, which is configured to be openable and closable and which surrounds and grips the outer periphery of the lower end of the backstay device, so that the backstay device can be removed from the lever link and the pile driver This has the effect of preventing troubles such as crashing into side members.

In addition, according to the present invention, the lever link is attached so that it can be stored so that it does not protrude from the side of the lower running body, so it can be stored out of the way without being removed during the actual work or transportation of the pile driver. There are some possible effects.

[Brief explanation of drawings]

Fig. 1 is a side view showing an example of a pile driver and the assembly process of the leader and backstay device, Fig. 2 is a plan view showing a conventional technique for guiding the backstay device during assembly, and Figs. 3 and 4 are An embodiment of the present invention is shown in which FIG. 3 is a perspective view of the device in use, and FIG. 4 is an enlarged plan view showing the condition of attachment to one of the undercarriage bodies. DESCRIPTION OF SYMBOLS 1... Lower running body of the pile driver, 1a... Side frame as a frame of the lower running body, 2... Upper revolving body of the pile driver, 3... Leader, 5... Backstay device, 7... ...Pin for hanging and supporting the backstay device, 11...Seat for the backstay device, 12...Rear beam, 15, 16...Retraction sheave for the backstay device, 17...Retraction wire, 21...For lever link Bracket, 27...Pin as a pivot point of the lever link, 29...Lever link, 29a, 29b...
...First and second members constituting the lever link, 33...Holder for backstay device, 33
a...Holder main body, 33b...Holder lid body, 36
...Pivot pin as a fulcrum for opening and closing the holder lid, 3
7...Insertion/removal pin for fixing the holder lid, 38...Trajectory for guiding the backstay device.

Claims (1)

[Claims for Utility Model Registration] 1. A backstay that, when assembling the leader and backstay device of a pile driver, pulls the seat of the backstay device suspended from the leader into a mounting device set on the rear beam via a pull-in wire. In the guide device, a lever link configured to be extendable and retractable and for pushing the backstay device outward is rotatably attached to the outer side of the frame of the lower traveling body constituting the pile driver, and a tip end of the lever link is rotatably attached. The present invention is characterized in that a holder is provided that is configured to be openable and closable and that surrounds and grips the outer periphery of the lower end of the backstay device, and that the lever link is configured to be retractable so that it does not protrude from the side of the lower traveling body. Backstay guide device for pile driver. 2. The backstay guide device for a pile driver according to claim 1, wherein the lever link is configured such that a base portion thereof can be rotated in the vertical direction.