JPH09328751A - Back stay guide device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the damage to a connection part when a leader rises and falls so as to reduce the burden of an operator by providing a sleigh which slides on an installation face of a pile driving machine when the leader rises and falls in the assembly and disassembly of the pile driving machine in a lower end part of a back stay. SOLUTION: A hoisting ring 38 for hoisting up a lower end of a back stay 4 by an accompanying crane is provided in a divided member a on one hand which constitutes a bracket 35 attached on a rod 23 of a hydraulic cylinder 4a. Moreover, a sleigh 40 which slides a lower end of the back stay 40 on an installation face of a pile driving machine by a pin 39 when a leader rises and falls is attached in a divided member b on the other hand in such a manner that the sleigh 40 can turn freely. The sleigh 40 is held in an evacuation condition between the bracket 35 and the sleigh 40 by fixing fixing plates 41, 42 fixed on the divided member b and the sleigh 40, respectively, by a fixing tool 43 of a pin. Consequently, the sleigh 40 slides on the installation face of the pile driving machine when the leader rises and falls to assemble and disassemble the pile driving machine, and it is possible to prevent sinking down of a connection part 7 into the installation face and prevent the damage to the connection part 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a backstay guide device for a pile driving machine, and more specifically, to assembling a pile driving machine.
The present invention relates to a device for sliding a lower end portion of a backstay along an installation surface of a pile driver when the leader is undulated for disassembly.

[0002]

2. Description of the Related Art FIGS. 8A and 8B are a side view and a front view showing a pile driver, respectively. The pile driver has a leader 2 on a front portion of a pile driver body 1 with a pin 3 interposed therebetween. The leader 2 is supported by backstays 4 with two hydraulic cylinders 4a on the left and right mounted between the pile driver main body 1 and the leader 2, and the inclination of the leader 4 on the left, right, front and back is determined by the hydraulic cylinder 4a. It can be adjusted by stretching. The leader 2 includes a winch or a leader 2 mounted on the main body 1 of the pile driver.
A vertical hole excavating tool and a hammer for driving a pile are mounted so as to be vertically movable by an elevating device (not shown) provided in the above.

Further, this pile driving machine has an undulating winch 8 mounted on the pile driving machine main body 1 as a self-moving undulating device, and an undulating rope 9 which is wound and fed by the undulating winch 8 is placed on a sheave block on an A frame 10. 11 and the bridle 12 are hung around, the pendulum rope 13 is connected between the bridle 12 and the leader 2, and when the leader 2 is short, it can be erected from a horizontal posture by an undulating winch 8. ing. On the other hand, the undulating winch 8
When using the leader 2 that is too long to be undulated by itself, the hook of the companion crane is connected to the leader 2, and when the leader 2 is raised up to the self-standing angle, the standing work by the companion crane is stopped, and the hoisting winch 8 is used. Stand up the reader 2.

9 (A) and 9 (B) are views for explaining a working state in which the leader 2 is erected when the pile driver is assembled as described above, and shows a case where the leader 2 is erected by itself. . When the leader 2 is raised to a certain tilt angle by the undulating winch 8, the lower end of the backstay 4 (the connecting portion 7 at the tip of the rod of the hydraulic cylinder 4a) whose upper end is connected to the leader 2 in advance is attached to the main body 1 of the pile driver. After being connected to the receiving portion, the hydraulic cylinder 4a of the back stay 4 is contracted to erect the leader 2 until it becomes vertical.
When disassembling the pile driver, the reader 2 is defeated by going through the reverse procedure.

9A and 9B, an auger 15 is connected to the hook 17 of the main winding rope 16 and acts as an anchor in order to prevent the leader 2 from tilting backward when the leader 2 is erected. A drive or hammer. Reference numeral 18 is a hook block connected to the auxiliary winding rope 19 for lifting an auger drive device and the like.

As shown in FIGS. 9 (A) and 9 (B), when the leader 2 is erected by the companion crane or the undulating winch 8, the upper end of the back stay 4 must be connected to the leader 2 in advance as described above. In the middle of the standing motion, the connecting portion 7 at the lower end of the back stay 4 as shown in FIG. 9C (the connecting portion 7 is the hemispherical recess 2 of the bearing body 28).
8a is fitted with a spherical portion 23a at the tip of the rod 23 of the hydraulic cylinder 4a, and a half-preventing retaining member 29 is fixed to the bearing main body 28 with a bolt 30.
A mounting flange 21 is provided integrally with the bearing body 28, and the flange 21 has an insertion hole 21a for a mounting bolt. ) Is an installation surface 20 made of soil or asphalt
The leader 2 is raised while sliding in the X direction (when the leader 2 is long, it may slide in the opposite X direction). However, since the connecting portion 7 has a universal joint structure composed of a ball bearing as shown in the drawing, the mounting flange 21 for the pile driver main body 1 fits into the installation surface 20 made of soil or asphalt. The movement of the connecting portion 7 is blocked, and an unreasonable force is applied to the connecting portion 7 and the rod 23 of the hydraulic cylinder 4a, which may damage them. Therefore, the operator must prevent such a situation from occurring. The hydraulic cylinder 4a of the back stay 4 is expanded / contracted in accordance with the standing motion of the leader 2 so that the connecting portion 7 does not slide on the installation surface 20 of the pile driver. It is necessary to check both the amount of expansion and contraction of the hydraulic cylinder 4a and the amount of expansion and contraction.

In order to prevent such a problem, in Japanese Unexamined Patent Publication No. 6-299554, a cart having four wheels is attached to the connecting portion 7, and the wheels of the cart are rolled with the ups and downs of the reader 2. This allows the connecting portion 7 to move smoothly in the arrow X direction (when standing) or in the opposite direction (when falling).

[0008]

However, as described in the above-mentioned publication, a truck is attached to the connecting portion 7 and the connecting portion 7 is connected.
9A, the reader 2 is lifted from the state where the reader 2 is placed horizontally on the table 24 on the ground and floated from the table 24, as shown in FIG. 9A. Only the lifting force acts, and the left and right movements are free within the range of the play of the mounting part by the pin 3 and the flexibility,
On the other hand, since the carriage attached to the lower end of the backstay 4 described in the above publication can freely roll on the installation surface of the pile driver main body 1, the leader 2 may shake greatly to the left or right. Also, the leader 2 stands up to a certain degree, and the back stay 4
Even when it is possible to connect the lower end of the to the pile driver main body 1, when a strong wind or the like exerts a force in the turning direction on the leader 2, the back stay 4 does not receive a restraining force,
The reader 2 may shake and is unstable. Also,
Since the trolley has a complicated structure, is expensive and bulky, and has a complicated structure, it is easily broken.

In view of the above-mentioned problems, the present invention can prevent damage to the connecting portion of the back stay in the leader erection work, improve stability when the leader is erected, and are simple, inexpensive and small in size. Thus, it is an object of the present invention to provide a backstay guide device which can prevent the leader from swinging to the left and right when the leader is undulated.

[0010]

SUMMARY OF THE INVENTION According to the present invention, a leader is movably attached to a front portion of a pile driver main body, and the interposition between the leader and the pile driver main body is provided by left and right back stays. In the pile driver supporting the pile driver, a sled for sliding on the installation surface of the pile driver at the time of undulating the leader at the time of assembling and disassembling the pile driver is provided at the lower end portion of the backstay (claim 1). ).

Further, the sled is attached to a rod of a hydraulic cylinder provided on the lower end side of the back stay (claim 2). When mounting a sled on this rod, a groove is provided around the rod of the hydraulic cylinder, the circular arc portion of the inner periphery of the bracket is fitted in the groove, and the bracket is attached so as to be rotatable around the rod axis. A structure in which the sled is provided on a bracket (claim 3), or a structure in which the bracket has a suspension ring for a back stay (claim 4)
Alternatively, the bracket may have a structure (claim 5) that is used as a component of an expansion / contraction preventing or restricting device of the hydraulic cylinder, and the sled is attached to the pile driver body at the end of the hydraulic cylinder. It may be configured by a curved body having a shape surrounding the connecting portion (claim 6).

Further, according to the present invention, a structure is provided in which a retracting mechanism for raising and stopping the sled is provided.
Alternatively, a structure in which the sled is integrally provided with the bracket or the connecting portion to the main body of the pile driver (claim 8) is also adopted.

[0013]

According to the first aspect of the present invention, since the sled is provided at the lower end of the back stay, the sled slides on the pile driver installation surface when the leader is raised and lowered, so that the connection portion is prevented from being entangled in the installation surface. Damage to parts is prevented. In addition, the sled is pressed against the installation surface by the weight of the backstay and imparts an appropriate movement resistance to the backstay, so that the backstay is prevented from freely moving even when the leader is floated from the horizontal posture or after standing up to some extent. Therefore, it is possible to prevent the leader from being shaken by the wind.

According to the present invention, since the sled is attached to the rod of the hydraulic cylinder, the leader can be undulated while the joint is floated and no force is applied to the joint. According to the third aspect of the present invention, since the sled is rotatably attached to the rod, even if the back stay is twisted with respect to the pile driver installation surface due to the ups and downs of the leader, the back stay is twisted. The sled rotates around the rod, and no excessive force is applied to the sled and its mounting part.

According to the present invention, since the suspension ring is provided on the bracket provided with the sled, it is also used as a suspension ring when the lower end of the back stay is lifted by an associated crane or the like when the back stay is attached to or detached from the pile driver body. . In the fifth aspect, the bracket provided with the sled is also used as a device for preventing expansion or contraction during the construction of the hydraulic cylinder of the back stay.

According to the sixth aspect of the present invention, the sled is formed of the curved surface body surrounding the connecting portion, so that the sled slides smoothly on the installation surface during the entire period of the ups and downs of the leader without the back stay. According to the seventh aspect, since the retracting mechanism for fixing the sled during the construction is provided, it is not necessary to remove the sled. In claim 8, since the sled is integrally provided on the connecting portion or the bracket,
There is no need to attach or detach sleds.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a lower portion of an embodiment of a backstay guide device according to the present invention, namely, a hydraulic cylinder 4a.
It is a longitudinal cross-sectional view showing the portion of FIG. 2 (A), (B), and (C) are EE and F of FIG. 1, respectively.
It is a FG sectional view. FIG. 3 shows a state in which the lower end of the hydraulic cylinder is attached to the rear beam 27 (see FIG. 8) which projects from the rear side surface of the pile driver body 1. The connecting portion 7 has the mounting flange 21 integrally formed with the bearing main body 28 and the square bolt insertion holes 21a and 31a of the receiving portion 31 of the rear beam 27, and the bolt 32 is inserted into the nut 3 to form the nut 3.
It is detachably attached to the rear beam 27 by being screwed onto and fastened to 3.

In FIG. 3, reference numeral 35 denotes a bracket attached to the rod 23 of the hydraulic cylinder 4a. The bracket 35 is rotatably fitted in an annular groove 23b provided around the tip of the rod 23. It is provided together. That is, as shown in FIG. 2C, the bracket 35 is composed of two divided members a and b, and the semi-circular arc portions c and d of the divided members a and b are fitted into the annular groove 23b. , The bolts 36, and the nuts 37 are used to fasten the divided members a and b to each other, so that the divided members a and b are rotatably attached.

One of the divided members a constituting the bracket 35 has a suspension ring 38 for suspending the lower end of the back stay 4 by an associated crane or the like. A sled 40 for sliding the lower end of the back stay 4 on the pile driver installation surface when the leader 2 is raised and lowered is rotatably attached to the other divided member b by a pin 39.

As shown in FIGS. 1 and 2C, one split member b is provided between the bracket 35 and the sled 40.
By fixing the fixing plates 41 and 42 respectively fixed to the sled 40 with a fixing member 43 such as a pin, the sled 40 can be retracted in the raised state (the state shown by the solid line in FIG. 1). This constitutes a retracting mechanism.

The bracket 35 of this embodiment is shown in FIG.
As shown in, it is used as a member that constitutes a device for preventing expansion and contraction of the hydraulic cylinder 4a during construction of a pile driver. That is, as shown in FIG.
And the fixing bolt 45 and the bracket 35. The cylindrical body 44 includes two semi-cylindrical bodies e and f (see FIGS. 2A and 2B) having a structure for covering the rod 23,
It is composed of upper end flanges g and h and lower end flanges i and j. The upper end flanges e and f of the cylindrical body 44 are fastened to the lower end flange k of the tube 34 of the hydraulic cylinder 4a with bolts 46 and nuts 47. The bottom flange i,
j are fastened together by bolts 48 and nuts 49 (see FIG. 2 (B)), and the holes m and n of the flanges i and j and the holes p and q provided in the divided members a and b of the bracket 35 are respectively provided. Insert the set bolt 45,
The cylindrical body 44 is attached by screwing the nut 50 into the nut, and serves to improve the safety by limiting the range of expansion and contraction.

FIG. 4 is a view for explaining the operation of the sled 40. When the leader is raised and lowered, the sled fixing pin 43 shown in FIG. 1 is pulled out and the sled 40 is rotated about the pin 39. Freedom. First, as shown in FIG. 4A, when the backstay 4 is in a substantially horizontal state, that is, the leader 2 is in a substantially horizontal state, when the leader 2 is pulled up by the hoisting winch 8 or the associated crane, the connecting portion 7 floats. The sled 40 moves on the installation surface 20 while sliding in the arrow X direction. Then, as shown in FIG. 4 (B), when the flange 21 of the connecting portion 7 comes into contact with the installation surface 20 at an angle close to horizontal to eliminate the intrusion, the flange 21 of the connecting portion 7 also comes into contact with the ground. As shown in FIG. 4 (C), only the connecting portion 7 is grounded. In the present embodiment, when the angle between the installation surface 20 and the connecting portion 7 becomes small and the risk of slipping in is eliminated, the sled 40 is brought into contact with the installation surface 20 at the connecting portion 7. Although it is made small in size and can be provided at low cost without being an obstacle, the sled 40 may be in contact with the ground and the connecting portion 7 may be floated over the entire range of the undulation movement.

As described above, when the sled 40 is provided on the lower end of the back stay 4 instead of the carriage, the lower end of the back stay 4 is prevented from slipping in and damage to the connecting portion 7 is prevented. Further, since the sled 40 is pressed against the installation surface 20 by the weight of the backstay 4 and imparts an appropriate movement resistance to the backstay 4, the sled 40 can be lifted from the horizontal posture or even after standing up to a certain extent. Since the free movement is hindered, it is possible to prevent the leader from being swung by the wind and swaying, and it is possible to undulate the leader 2 in a stable state.

The sled 40 may be attached to the connecting portion 7. However, by providing the sled 40 on the rod 23 as in this embodiment, the connecting portion 7 is not adversely affected when the sled 40 is moved, and the rod is further prevented. Sledge 40 rotatable relative to 23
It is possible to prevent the sled 40 from rotating due to the rotation of the back stay 4 in the twisting direction accompanying the ups and downs of the leader 2 and applying an unreasonable force to the sled 40 and the rod 23 that is the mounting portion thereof. .

The bracket 35 also serves as a mounting member for the suspension ring 38, and also as a device for preventing or limiting the expansion and contraction of the hydraulic cylinder 4a, the number of parts can be reduced as compared with the case where these members are separately provided. Further, at the time of construction, storage or transportation, the sled 40 should be held at the lower end of the backstay 4 by a fixture 43 such as a pin, bolt or wire so that it can be retracted from the grounding posture. This facilitates component management as compared to the case where the sled 40 is removed and stored.

5 (A) and 5 (B) are side views showing another embodiment of the present invention, and FIG. 6 is a view of the sled 51 of this embodiment seen from the front side of the pile driver. In this embodiment, the hydraulic cylinder 4a
The sled 51 is formed by an arcuate curved surface body having a shape that surrounds the end portion of the connection portion 7 to the pile driver body.
The sled 51 made of the curved surface body surrounds the connecting portion 7,
The bracket 35 is attached by removably fixing both ends of the bracket 35 with pins 52 and 53.

According to this embodiment, as shown in FIGS. 5A and 5B, the curved outer periphery s of the sled 51 is set on the installation surface 20 regardless of the angle of the leader 2, that is, the angle of the back stay 4. The backstay 4 can be moved smoothly over the entire range of movement of the backstay 4.

FIG. 7A shows another embodiment of the present invention.
A sled 5 having an arcuate sliding surface t on the bracket 35.
4 is an example in which bolts 55 and nuts 56 are attached. In the present embodiment, when the leader is undulating, the arcuate sliding surface t on the outer periphery of the sled 54 is brought into contact with the leader when undulating, so that the same connection as described above is achieved. The protection of the part 7 can be achieved. The sled 54 may be integrally welded to the bracket 35, or may be detachably attached by a pin.

FIG. 7B shows another embodiment of the present invention.
In this embodiment, the mounting portion (flange 21) of the connecting portion 7 to the pile driver main body 1 is integrally provided with a sled 57. By providing such a sled 57, the installation surface of the connecting portion 7 is provided. It is possible to prevent slipping in. Further, if the connecting portion 7 is integrally provided with the sled as in the present embodiment, the shape of the flange 21 only needs to be changed, and thus the object can be achieved at a lower cost. The structure in which the sled is integrally provided may be adopted for the bracket 35 and the retaining member 29.

Further, the sled 57 may have a structure in which it is attached to the connecting portion 7 with a bolt, a nut, a pin or the like.

[0031]

According to the first aspect of the present invention, since the sled for sliding on the installation surface of the pile driver at the time of assembling and disassembling the pile driver at the lower end of the backstay is attached, the sled can be lifted. The sledge slides on the installation surface of the pile driver, prevents the connection portion from slipping into the installation surface, and prevents damage to the connection portion.
Also, in order to prevent sliding on the pile driver installation surface of the connection part,
This eliminates the need for a nerve-like operation of expanding and contracting the hydraulic cylinder according to the ups and downs of the leader, thus reducing the burden on the operator.

Further, since the sled is pressed against the installation surface by the weight of the back stay and imparts an appropriate movement resistance to the lower end sliding surface of the back stay, when the leader is floated from the horizontal posture,
Alternatively, even after standing up to a certain extent, the back stay is prevented from freely moving, so that the leader is prevented from being shaken by the wind. Therefore, the leader can be undulated stably. In addition, the sled has a simpler structure than a trolley, and can be constructed as a small-sized one that is inexpensive and saves space.

According to the second aspect of the present invention, by mounting the sled on the rod of the hydraulic cylinder, the leader can be raised and lowered without causing any force to be applied to the connecting portion and the connecting portion. The protective effect is enhanced.

According to the third aspect, since the sled is rotatably attached to the rod, even if the back stay twists with respect to the pile driver installation surface due to the ups and downs of the leader, even if the angle changes. Along with the twist, the sled rotates around the rod, and no unreasonable force is applied to the sled and its mounting portion, and the sled and its mounting portion are less likely to be damaged.

According to the present invention, since the suspension ring is provided on the bracket provided with the sled, the bracket is also used as a suspension ring when the lower end of the back stay is lifted by an associated crane or the like when the back stay is attached to or detached from the pile driver body. It can be used for both purposes and can contribute to the reduction of the number of parts.

According to the fifth aspect, the bracket provided with the sled is also used as an expansion / contraction preventing or limiting device during construction of the hydraulic cylinder of the back stay, which can contribute to a reduction in the number of parts.

According to the sixth aspect of the present invention, the sled is formed of the curved body surrounding the connecting portion, so that the lower end connecting portion of the back stay is not connected to the pile driver body during the leader undulation period. Since the sled slides smoothly on the installation surface, the back stay slides smoothly.

According to the seventh aspect, by providing the retracting mechanism for fixing the sled at the time of construction, it is not necessary to remove the sled, which facilitates transportation and storage.

According to the eighth aspect, since the sled is integrally provided on the connecting portion or the bracket, it is not necessary to attach or detach the sled, and the transportation and storage are facilitated, and the sled has a simple structure. Can be realized without increasing the number of parts.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing a lower portion of an embodiment of a backstay guide device according to the present invention, that is, a lower portion of a hydraulic cylinder, which is shown in a state during construction.

2 (A), (B), and (C) are respectively E- of FIG.
It is an EF, FF, and GG sectional drawing.

FIG. 3 is a side view showing a state in which the lower end of the hydraulic cylinder is attached to a rear beam projecting to the rear side surface of the pile driver body in the embodiment of FIGS. 1 and 2.

FIG. 4A to FIG. 4C are side views for explaining the operation of this embodiment.

5 (A) and 5 (B) are side views showing another embodiment of the present invention with the back stays having different inclination angles.

6 is a view of the sled of the embodiment of FIG. 5 as seen from the front side of the pile driver.

7A and 7B are side views showing another embodiment of the present invention.

FIG. 8A is a side view of a conventional pile driver, and FIG. 8B is a front view thereof.

9 (A) and 9 (B) show the leader undulating work of a pile driver.
Side view showing the angle of the reader changed,
FIG. 9C is a diagram for explaining how the backstay is bent when the leader is undulated.

[Explanation of symbols]

1: Pile driver main body, 2: Leader, 3: Pin, 4: Back stay, 4a: Hydraulic cylinder, 5: Construction angle meter, 6: Operator's cab, 7: Connection part, 8: Undulating winch, 9: Undulating Rope, 10: A frame, 11: Sheave block, 12:
Bridle, 13: Pendant rope, 20: Installation surface,
21: flange, 23: rod, 23b: groove, 35: bracket, 39: pin, 40: sled, 43: fixture, 4
4: Cylindrical body, 45: Set bolt, 51, 54, 57: Sled

Claims (8)

[Claims] 1. A pile driver in which a leader is movably attached to a front portion of a pile driver main body, and the leader is supported by left and right back stays interposed between the leader and the pile driver main body. A backstay guide device comprising a sled at the lower end portion of the backstay that slides on the installation surface of the pile driver when the leader is raised and lowered during assembly and disassembly of the pile driver. 2. The backstay guide device according to claim 1, wherein the sled is attached to a rod of a hydraulic cylinder provided on a lower end side of the backstay. 3. The groove according to claim 2, wherein a groove is provided around the rod of the hydraulic cylinder, an arcuate portion of the inner circumference of the bracket is fitted in the groove, and the bracket is attached so as to be rotatable around the rod axis. A backstay guide device, characterized in that the sled is provided on the bracket. 4. The backstay guide device according to claim 3, wherein the bracket has a suspension ring for a backstay. 5. The backstay guide device according to claim 3, wherein the bracket is used as a constituent member of an expansion / contraction preventing or restricting device of the hydraulic cylinder. 6. The backstay according to claim 1, wherein the sled is formed of a curved body surrounding a connecting portion of the hydraulic cylinder end portion to the pile driver body. Guidance device. 7. The backstay guide device according to claim 1, further comprising a retracting mechanism for raising and stopping the sled. 8. The back stay guide device according to claim 1, wherein the sled is provided integrally with the bracket or a connecting portion to the main body of the pile driver.