JP3329719B2 - Pile driver - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pile driving machine suitably used for a pile driving operation at a construction site, for example.

[0002]

2. Description of the Related Art In general, at a construction site such as a building, a pile driving operation is performed at an initial stage of the construction by using a pile driving machine to solidify a ground foundation. As this pile driver, for example, the one shown in Japanese Patent Application Laid-Open No. 9-125383 is known. The pile driver is provided on the body, a leader provided on the front side of the body and standing upright, and provided on the body located near the leader, and fixing the body at a working position. A jack cylinder is provided, and various types of front attachments are attached to the leader according to the type of pile driving operation. Further, the reader is provided with a work floor movably up and down along the leader, and the work floor has a height at which the worker performs work during assembly work, disassembly work, and maintenance work of the reader, front attachment and the like. It is transported to a position.

[0003] In the conventional pile driver, assembly work, disassembly work of a leader, a front attachment and the like are performed.
When performing a work such as a maintenance work, when the user gets on the work floor from the ground, since there is no boarding means such as a ladder, the worker climbs from the crawler belt of the lower traveling structure to the upper revolving structure sequentially and gets on the work floor.

Further, as another conventional pile driving machine,
Japanese Unexamined Utility Model Publication No. Hei 7-25038 discloses another conventional technique in which a landing is provided on a leader bracket that supports a leader, and a ladder is provided on the landing. Thereby, the worker can get on the landing by climbing the ladder, and gets on the work floor provided on the leader from the landing.

[0005]

In the above-mentioned conventional pile driving machine, the pile driver is mounted on the work floor via the lower traveling structure, the upper revolving structure, etc., so that the user can get on and off the work floor. Is difficult and takes time to get on and off.

[0006] On the other hand, in another conventional pile driver, the landing provided on the leader bracket can be climbed by a ladder, but this ladder is unstable because its upper portion is merely hooked on the leader bracket. It is. Moreover,
Since the landing is fixed to the leader bracket, there is a problem that it is necessary to further get on the work floor from the landing, and it is necessary to provide a relay ladder on the work floor side, which complicates the configuration.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and an object of the present invention is to enable easy and safe getting on and off a work floor and to improve workability such as assembling work and disassembling work of a reader. An object of the present invention is to provide a pile driver that can be improved.

[0008]

A pile driver according to the present invention comprises:
An airframe, a leader provided on the front side of the airframe and standing upright, and an up- down direction provided on the airframe positioned near the reader to fix the airframe in a working position
The tube that extends to and expands and contracts downward from the tube
A jack cylinder comprising a protruding piston rod, and a work floor provided to be vertically movable along the leader are provided.

Then, in order to solve the above-mentioned problem,
A feature of the configuration adopted by the invention of claim 1 is that a ladder device for getting on and off the work floor is provided in the tube of the jack cylinder.

[0010] With this configuration, the ladder device can be provided by using the tube of the jack cylinder located near the leader, and the worker can be provided on the leader by climbing up and down the ladder device. Can easily get on and off the work floor.

According to a second aspect of the present invention, a ladder device comprises a fixed ladder attached to a tube of a jack cylinder, and a movable ladder which can be attached to an arbitrary position in the vertical direction with respect to the fixed ladder. .

With this configuration, when the user gets on and off the work floor using the ladder device, the ladder device can be extended by attaching the movable ladder to the lower part of the fixed ladder, and the ladder device can be moved up and down. can do. Also, when traveling, turning, etc., the ladder device can be shortened so as not to hinder the running operation and the turning operation by attaching the movable ladder to the upper part of the fixed ladder so that the movable ladder is overlaid on the fixed ladder. it can.

According to a third aspect of the present invention, a scaffold plate is provided on the upper side of the fixed ladder, and the scaffold plate is fitted and attached to a hanging tool provided on the upper end surface of the tube for lifting the jack cylinder. It is in.

[0014] With this configuration, the scaffold plate can be fitted and positioned by using the existing hanging tool provided on the tube of the jack cylinder, and the work of fixing the fixed ladder to the tube can be easily performed. Can do it.

According to a fourth aspect of the present invention, a clamp is provided on a fixed ladder, and the fixed ladder is attached to a tube of a jack cylinder by the clamp and is detachably supported. Thus, the fixed ladder can be firmly supported on the jack cylinder by the clamp. Also, by removing the clamp, the fixed ladder can be removed from the jack cylinder.

According to a fifth aspect of the present invention, in the ladder device, the length of the ladder device is set to be smaller than the length of the jack cylinder which has been minimized in a state where the movable ladder is mounted on the fixed ladder. It is in.

With this configuration, when the movable ladder is mounted on the fixed ladder, the length of the ladder device can be made smaller than the length of the jack cylinder in the most reduced state. Even when the ladder device is removed and stored, it can be stored with the ladder device attached.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A pile driver according to an embodiment of the present invention will be described below in detail with reference to FIGS.

Reference numeral 1 denotes a body of a pile driver. The body 1 includes a lower traveling body 2 having a crawler belt as shown in FIGS. 1 and 2, and an upper revolving body provided on the lower traveling body 2 so as to be pivotable. The upper slewing body 3 is provided with an operator cab 4, a plurality of winding drums (not shown), and the like.

Reference numeral 5 denotes a front bracket provided on the front side of the upper revolving unit. The front end of the front bracket 5 has a bifurcated U-shape. On the left and right side surfaces of the front bracket 5, mounting brackets 5A, 5 to which a jack frame 9 described later is rotatably mounted.
A (only one is shown) is provided.

Reference numeral 6 denotes a reader supported by the front bracket 5, and the reader 6 is set up almost upright.
The left and right back stays (not shown) hold this upright state. As shown in FIG. 3, the leader 6 is formed as a long cylindrical body made of a large-diameter pipe material, and an attachment (not shown) such as an earth auger or a hammer is attached to the front side so as to be able to move up and down. One guide pipe 7, 7 is attached over substantially the entire length. Further, on the right side of the leader 6, second guide pipes 8, 8 to which a later-described elevating frame 13 is attached so as to be able to ascend and descend are attached over substantially the entire length.

Reference numerals 9 and 9 denote jack frames provided on both the left and right sides of the front bracket 5, respectively. The left and right jack frames have their base ends turned to the mounting bracket 5A of the front bracket 5 as shown in FIG. It is movably connected, and a jack cylinder 11, which will be described later, is attached to the distal end side. A rotary cylinder 10 is provided between the jack frame 9 and the front bracket 5, and the jack frame 9 is rotated by the rotary cylinder 10 in directions indicated by arrows A and A 'in FIG.

Reference numerals 11 and 11 denote left and right jack cylinders which are located near the leader 6 and are provided at the leading ends of the left and right jack frames 9 and 9, respectively. The left and right jack cylinders 11 are jack frames. 9 is attached to the distal end side of the tube 9 and detachably pin-connected to the tube 11A.
Piston rod 1 protruding downward and extendable from 1A
1B and a ground contact portion 11C attached to the tip of the piston rod 11B. In addition, the upper end surface of the tube 11A is located at
Is fixed, and the jack cylinder 1 is attached to the hanging tool 11D.
When lifting 1, a wire rope (not shown) or the like is hung.

Here, each jack cylinder 11 extends the piston rod 11B as shown in FIG. 5 and presses the ground contact portion 11C against the ground when fixing the machine body 1 to the working position in performing the pile driving operation. . On the other hand, when running the lower traveling body 2 or rotating the upper rotating body 3, the piston rod 11B is reduced as shown in FIG. The state shown in FIG. 6 of the jack cylinder 11 is the minimum contraction state, and the length dimension at this time is L.

Reference numeral 12 denotes a work floor provided on the reader 6, and the work floor 12 is attached to the second guide pipes 8, 8 of the reader 6 via a lifting frame 13 so as to be vertically movable. One end of each of the wire ropes 14 is connected to the lifting frame 13.
The other end of 4 is connected to a hoisting device 15 attached to the left side of reader 6 via a sheave (not shown) provided at the tip of reader 6. Thereby, the work floor 12
The wire rope 14 is taken up and unwound by the hoisting device 15 and is moved up and down along the leader 6 together with the elevating frame 13.

The work floor 12 is generally constituted by a square floor plate 12A and a handrail 12B standing upright so as to surround the floor plate 12A, and a part of the handrail 12B is used for getting on and off. Door 12C.

Reference numeral 16 denotes a ladder device provided on the right jack cylinder 11, and this ladder device 16 is generally constituted by a fixed ladder 17 and a movable ladder 21, which will be described later.

First, reference numeral 17 denotes a fixed ladder attached to the tube 11A of the jack cylinder 11;
Is a ladder body 18 composed of left and right handrails 18A, 18A extending vertically and a plurality of treads 18B, 18B,... Arranged between the handrails 18A at equal intervals in the vertical direction. Scaffolding plate 19 fixed to the upper end of each handrail 18A of 18
And clamps 20, 20 which are provided on the upper and lower sides of the ladder main body 18 so as to be separated from each other, and which attach the ladder main body 18 to the tube 11 </ b> A and support the ladder main body 18 in a detachable manner.

Here, the scaffold plate 19 is, as shown in FIG.
The jack cylinder 11 is formed in a square shape that covers the upper end surface of the tube 11A, and a fitting hole 19A for fitting with the hanging tool 11D is formed near the center thereof. Thereby, when attaching the fixed ladder 17 to the tube 11A, the scaffold plate 1
The fixed ladder 17 can be positioned at a predetermined position with respect to the tube 11A by fitting the 9 fitting holes 19A into the hanging tool 11D.

Further, as shown in FIG.
A substantially W-shaped support plate 20A fixed to each handrail 18A of the ladder main body 18, a U-bolt 20B curved along the peripheral surface of the tube 11A, and the U-bolt 20B are connected to the support plate 20A.
And a nut 20C, 20C screwed to the tip of the U bolt 20B for fixing to the side.

Numeral 21 denotes a movable ladder hooked on a fixed ladder 17. The movable ladder 21 is disposed between the left and right handrails 22A, 22A extending in the vertical direction and each handrail 22A at equal intervals in the vertical direction. Ladder main body 22 composed of a plurality of tread bars 22B, 22B,..., And two adjacent tread bars 18B fixed to the upper side of left and right handrails 22A, 22A and adjacent to each other on tread bar 18B on fixed ladder 17 side. 18B, a plurality of U-shaped hooks 23 attached to the hooks 18B in a hooked state.

When getting on and off the work floor 12 using the ladder device 16 configured as described above, each hook 23 of the movable ladder 21 is attached to the lower ladder body 18 of the fixed ladder 17 as shown in FIG. It is hooked on two side treads 18B, 18B. As a result, the length of the ladder device 16 becomes L
The worker can get on and off the work floor 12 by climbing up and down the ladder device 16.

On the other hand, when performing a traveling operation and a turning operation,
When removing and storing the jack cylinder 11,
As shown in FIG. 6, each hook 23 of the movable ladder 21 is connected to two upper tread bars 1 provided on the ladder main body 18 of the fixed ladder 17.
8B and 18B. Thereby, the fixed ladder 17
The length of the ladder device 16 can be reduced to L2, which is smaller than the length L of the jack cylinder 11 in the most reduced state, by overlapping the movable ladder 21 with the ladder 21.

In FIG. 8, reference numeral 24 denotes a cylinder storage device for storing each jack cylinder 11. The cylinder storage device 24 is detached when the pile driver is disassembled and transported. The jack cylinders 11 are stored in a state in which they are collected.

The pile driving machine according to the present embodiment has the above-described configuration, and when performing a pile driving operation, the piston rod 11B of each jack cylinder 11 is extended to fix the machine body 1 at the operation position. . In this state, the first
Pile driving is performed by an attachment such as an earth auger attached to the guide pipe 7.

Next, a description will be given of a case in which maintenance work such as assembly, disassembly work, lubrication and the like of the reader 6 and the attachment is performed.

In this case, as shown in FIG. 5, the movable ladder 21 of the ladder device 16 is hooked on a tread 18B located below the fixed ladder 17, and the length of the ladder device 16 is extended to L1. . Then, the worker climbs up and down the ladder device 16 to get on and off the work floor 12 and
After moving the work 2 to a predetermined height position, various works are performed on the work floor 12.

On the other hand, when the traveling operation by the lower traveling unit 2 and the turning operation of the upper revolving unit 3 are performed, the jack cylinder 1
A case where the storage device 1 is removed and stored will be described. In these cases, as shown in FIG. 6, the movable ladder 21 is hung on a tread 18B located above the fixed ladder 17 and the movable ladder 21 is superimposed on the fixed ladder 17 to thereby reduce the length of the ladder device 16. The ladder device 16 is made smaller than the length dimension L of the jack cylinder 11 in the most reduced state. This can prevent the ladder device 16 from coming into contact with the lower traveling structure 2 or the like when, for example, the upper rotating body 3 is rotated. Also, the jack cylinder 11
As shown in FIG. 8, the jack cylinder 11 can be mounted on the cylinder storage tool 24 and stored with the ladder device 16 mounted as shown in FIG.

Therefore, according to the present embodiment, the reader 6
By attaching the ladder device 16 to the jack cylinder 11 provided on the fuselage 1 in the vicinity of the vehicle, the ladder device 16 allows the user to get on and off the work floor 12 attached to the reader 6 as in the prior art. In addition, it is possible to directly get on and off the work floor 12 without passing through the lower traveling structure 2, the upper revolving structure 3, and the like, thereby facilitating the getting on and off work, shortening the work time, and improving safety. it can. Further, since the view from the cab 4 is not obstructed, the work of attaching and detaching the ladder device 16 can be omitted. Further, the ladder device 16 has a simple configuration and can be manufactured at low cost.

Further, the ladder device 16 is indicated by an arrow A in FIG.
The work floor 1 is provided on the jack cylinder 11 rotatable in the direction A ′.
The distance between the ladder device 2 and the ladder device 16 can be adjusted, and getting on and off the work floor 12 can be performed easily and safely.

In this embodiment, the ladder device 16
Is constituted by a fixed ladder 17 fixed to the tube 11A of the jack cylinder 11, and a movable ladder 21 which can be attached to the fixed ladder 17 at an arbitrary position in the vertical direction. Therefore, the ladder device 16 can be accommodated within the length dimension L of the jack cylinder 11 which has been minimized by stacking the movable ladder 21 on the fixed ladder 17 and hooking the movable ladder 21. The device 16 can be prevented from being damaged. Further, at the time of transportation, the jack cylinder 11 can be stored while the ladder device 16 is attached, so that the transportation operation can be facilitated.

Further, the scaffolding plate 19 fixed on the upper side of the fixed ladder 17 is provided with a fitting hole 19A for fitting to the hanging tool 11D of the jack cylinder 11, and when the fixed ladder 17 is mounted on the jack cylinder 11, this fitting is performed. Hanging 19
It is configured to fit into 1D. As a result, the fixed ladder 1
7 can be fixed to the tube 11A by the clamp 20 in a state where it is positioned with respect to the tube 11A, and the mounting operation can be easily performed. In addition, scaffold board 1
9, the fixed ladder 17 can be firmly supported in the vertical direction.

Further, since the fixed ladder 17 is fixed to the tube 11A by the upper and lower clamps 20, 20, the ladder device 16 can be stabilized, and the ladder 17 can be safely entered and exited.

In the embodiment, the movable ladder 21 is provided with a plurality of hooks 23, and the movable ladder 21 is hooked to the fixed ladder 17 by these hooks 23. However, the present invention is not limited to this. For example, a configuration may be adopted in which the movable ladder is slid with respect to the fixed ladder, moved, and locked at an arbitrary position.

[0045]

As described in detail above, according to the first aspect of the present invention, since the jack cylinder tube is provided with the ladder device for getting on and off the work floor, the jack cylinder tube located near the leader is provided. The ladder device can be provided using the ladder device, and the worker can easily get on and off the work floor provided on the leader by climbing up and down the ladder device. Thereby, unlike the prior art, without passing through the lower traveling structure, the upper revolving structure, etc.,
It is possible to easily and safely get on and off the work floor, thereby shortening the work time and improving safety.

According to the second aspect of the present invention, the ladder device comprises a fixed ladder attached to the jack cylinder and a movable ladder which can be attached to an arbitrary position in the vertical direction with respect to the fixed ladder. Therefore, when getting on and off the work floor using the ladder device, the ladder device can be extended by attaching the movable ladder to the lower part of the fixed ladder,
The ladder device can be climbed up and down. Also, when driving,
At the time of turning, etc., by attaching the movable ladder to the upper part of the fixed ladder so as to overlap the movable ladder on the fixed ladder, the ladder device can be contracted so as not to hinder the running operation and the turning operation. Damage can be prevented.

According to the third aspect of the present invention, since the scaffold plate provided on the upper side of the fixed ladder is fitted and attached to the lifting device of the jack cylinder, the existing lifting device provided on the jack cylinder is used. Thus, the scaffold plate can be fitted and attached, the work of fixing the fixed ladder to the tube can be facilitated, and the workability when attaching the ladder device can be improved.

According to the fourth aspect of the present invention, since the fixed ladder is attached to the tube of the jack cylinder by the clamp and is detachably supported, the fixed ladder can be firmly supported by the clamp by the clamp. Further, by removing the clamp, the fixed ladder can be removed from the jack cylinder, and the attachment / detachment operation can be easily performed.

According to the fifth aspect of the present invention, in a state where the movable ladder is mounted on the fixed ladder, the length of the ladder device is reduced.
Since the length of the jack cylinder is set to be smaller than the length of the jack cylinder that has been minimized, the length of the ladder device can be made smaller than the length of the jack cylinder that is in the minimum state. Even when the ladder device is stored, the ladder device can be stored with the ladder device attached, and workability can be improved.

[Brief description of the drawings]

FIG. 1 is a front view showing a pile driver according to an embodiment of the present invention.

FIG. 2 is a side view of the pile driver shown in FIG.

FIG. 3 is an enlarged cross-sectional view of a main part of the work floor and the ladder device as viewed from the direction of arrows III-III in FIG.

FIG. 4 is an enlarged cross-sectional view of a main part of the jack frame, the jack cylinder, the ladder device, and the like, as viewed from the direction of arrows IV-IV in FIG.

FIG. 5 is an enlarged vertical sectional view of a main part, showing the ladder device in an extended state together with a jack cylinder, as viewed from a direction indicated by arrows VV in FIG. 2;

FIG. 6 is an enlarged vertical sectional view of a main part, showing the ladder device in a contracted state together with a jack cylinder as viewed from the same position as in FIG. 5;

FIG. 7 shows an arrow V in FIG.
FIG. 7 is an enlarged cross-sectional view as viewed from the direction of II-VII.

FIG. 8 is a front view showing a state where each jack cylinder is stored in a cylinder storage tool.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Airframe 6 Leader 11 Jack cylinder 11A Tube 11B Piston rod 11C Grounding part 11D Hanging equipment 12 Work floor 16 Ladder device 17 Fixed ladder 19 Scaffolding plate 19A Fitting hole 20 Clamp 21 Movable ladder L Length of jack cylinder in the minimum contraction state Length dimension when L1 ladder device is extended Length dimension when L2 ladder device is contracted

Continuation of front page (58) Field surveyed (Int.Cl. ⁷ , DB name) E02D 7/16

Claims (5)

(57) [Claims] 1. An airframe, a reader provided on the front side of the airframe and standing upright, and a working position of the airframe.
A vertically extending tube provided on the body positioned near the leader to secure the
In a pile driving machine having a jack cylinder comprising a piston rod protruding so as to be able to expand and contract, and a working floor movably provided in a vertical direction along the leader, a tube of the jack cylinder is provided. A ladder device for getting on and off the work floor. 2. The ladder device according to claim 1, wherein the ladder device comprises a fixed ladder attached to a tube of the jack cylinder, and a movable ladder attachable to an arbitrary position in the vertical direction with respect to the fixed ladder. Pile driver. 3. A scaffold plate is provided above the fixed ladder, and the scaffold plate is fitted and attached to a hanger provided on an upper end surface of a tube for lifting the jack cylinder. The pile driver described in the above. 4. The pile driver according to claim 2, wherein a clamp is provided on the fixed ladder, and the fixed ladder is attached to a tube of the jack cylinder by the clamp and is detachably supported. 5. The ladder device according to claim 2, wherein a length dimension of the ladder device is set to be smaller than a length dimension of the jack cylinder that has been minimized in a state where the movable ladder is mounted on the fixed ladder. , 3 or 4.