JP3446081B2 - Guide cylinder structure of construction machine cylinder - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work machine for a construction machine, such as a boring machine, a full-rotation tubing device, and a casing driving device for a pile driving machine. The present invention also relates to a guide tube structure of a cylinder that moves up and down another frame. 2. Description of the Related Art For example, a full-rotation tubing device for pushing and pulling a casing used for foundation work such as construction and civil engineering, and a casing chuck device used for a casing rotation driving device of a pile driving machine are provided with a casing insertion device. A chuck frame formed with holes and arranged in a vertically opposed manner to a rotating body rotatably provided on the main frame; a chuck cylinder provided on the main frame to support the chuck frame so as to be able to move up and down; A chuck member supporting frame provided so as to be capable of being inserted, and a plurality of chuck members supported by the chuck member supporting frame and inserted into an outer periphery of a casing inserted into the casing insertion hole, and the chuck member is rotated by a chuck cylinder. Between the inner wall of the casing insertion hole and the outer peripheral surface of the casing. Then, the casing is chucked to rotate integrally with the rotating body, and the casing is pushed and pulled out. At this time, a lateral load or an eccentric load is applied to the piston rod of the chuck cylinder. Conventionally, in a full-rotation tubing apparatus, for example, as shown in FIG. Main frame 4
The influence of these loads is reduced by placing a lifting cylinder 42 that lifts and lowers 1 in a guide cylinder 44 of a telescopic structure, covering the piping 43, but the chuck cylinder 45 is not provided with a guide cylinder. Further, since neither the casing rotation drive device nor the chuck cylinder, which is hung by a wire rope from above the leader of the pile driver, has a guide cylinder, these loads directly act on the piston rod of the chuck cylinder. In the excavation method, a casing press-fitting device is supported by a cylinder provided on a frame of an auger rotating device so as to be able to move up and down. However, the cylinder is placed in a guide cylinder having a telescopic structure. [0005] For this reason, a structure is provided in which a guide cylinder is provided so that a lateral load or an eccentric load does not directly act on the piston rod of the chuck cylinder. Providing a tube,
It is conceivable to put a chuck cylinder in the guide cylinder of the telescopic structure like the lifting cylinder,
In the case of this structure, it is necessary to cover the piping of the cylinder.
It is expected that the planar size of the entire device will increase and workability in a narrow site will be reduced. Accordingly, an object of the present invention is to provide a guide cylinder structure for a cylinder of a construction machine having a structure in which a lateral load or an eccentric load does not directly act on a piston rod of the cylinder and a planar dimension of the entire apparatus does not increase. I have. [0007] In order to achieve the above-mentioned object, the present invention relates to a work apparatus frame, a cylinder provided on the frame, and another frame which is raised and lowered by the cylinder. Construction machine having an outer diameter slightly larger than the outer diameter of the cylinder cylinder of the cylinder.
The id tube, provided on the piston rod side of the cylinder tube
While fixed to the flange of the cylinder barrel, said Siri
A second guide cylinder having an outer diameter approximately equal to the outer diameter of the cylinder,
Only set around the piston rod connecting portion, the second guide tube first
It is characterized by being slidably inserted into a guide cylinder . [0008] Each embodiment of the present invention will be described below.
This will be described in detail with reference to the drawings. FIGS. 1 to 4 show a first embodiment in which the present invention is applied to a casing rotary drive device suspended from a top of a leader of a pile driver by a wire rope, and is erected at a front portion of a base machine 1. Reader 2
Auger rotary drive 3 and casing rotary drive 4
Is suspended from the top sheave 5 and is provided so as to be able to move up and down along the leader 2, the hollow casing 7 is rotated by the casing rotation driving device 4, and the pile driving machine 6 Then, the inside of the casing 7 is excavated to lay the casing 7 underground. The casing rotation driving device 4 rotatably supports a cylindrical rotating body 10 having a casing insertion hole 9 formed on an inner periphery thereof on a main frame 11. Rotating body 10
The gear 14 of the hydraulic motor 13 provided on the main frame 11 meshes with a gear 12 formed on the outer periphery via an idler 15 and rotates by driving the hydraulic motor 13. In the upper inner wall of the casing insertion hole 9, a plurality of chuck grooves 16 having a tapered surface converging downward are formed at equal intervals. The main frame 11 is provided with a casing chuck device 17. The casing chuck device 17 includes a chuck frame 18 that is disposed above the rotating body 10 so as to be opposed, a chuck cylinder 19 that is provided on the main frame 11 and supports the chuck frame 18 so as to be able to move up and down, and is rotatable by the chuck frame 18. And a plurality of wedge-shaped chuck members 2 supported by the chuck member support frame 20 and sliding in the chuck grooves 16, respectively.
1 is provided. The back surface of the chuck member 21 is formed as a tapered surface that converges downward. Also,
The top sheave 5 is provided on the upper surface of the chuck frame 18.
A sheave 23 around which a wire rope 22 is wound is provided. The chuck cylinder 19 is a cylinder cylinder 19
a on the chuck frame 18 and the piston rod 1
9b are connected to the main frame 11, respectively. On the piston rod side of the cylinder cylinder 19a, a first guide cylinder 24 heading toward the main frame 11 is provided on a flange 19c of the cylinder cylinder 19a. A second guide cylinder 25 is provided around the piston rod connecting portion of the main frame 11 toward the chuck frame 18. The second guide cylinder 25 is provided with the first guide cylinder 24.
It is slidably inserted in the inside. This second guide cylinder 25
Outer diameter, since the planar dimensions of the overall smaller device becomes compact, shall be the outer diameter about the cylinder tube 19a. With this configuration, even if a lateral load or an eccentric load occurs, the first guide cylinder 24 and the second guide cylinder 25 bear the load, and the piston rod 19 of the chuck cylinder 19
No load is applied directly to b. Moreover, the first guide cylinder 24
Are provided on the piston rod side of the cylinder cylinder 19a, so that the pipes 19 connected to the body of the cylinder cylinder 19a
It is not necessary to cover d, the outer diameter of the first guide cylinder 24 is slightly larger than the outer diameter of the cylinder cylinder 19a, and the planar size of the casing rotation drive device 4 does not increase. Therefore, the workability in a narrow site is not reduced, and the weight increase is small, so that the stability of the pile driver 6 is not affected. The present invention is also applicable to a full-rotation tubing apparatus. In the above embodiment, the cylinder cylinder 19a of the chuck cylinder 19 is connected to the chuck frame 1.
8, the cylinder rod 19 b is connected to the main frame 11, but the cylinder tube 19 a may be connected to the main frame 11, and the cylinder rod 19 b may be connected to the chuck frame 18. FIGS. 5 and 6 show a second embodiment in which the present invention is applied to a digging method machine.
A casing press-in device 31 for press-fitting the casing and an auger rotating device 32 having an auger screw for excavating the inside of the casing are provided.
A wire rope 34 hung from the top sheave of the reader is wrapped around 3 and is hung up and down by the reader. The casing press-fitting device 31 includes an auger rotating device 32.
Are supported so as to be able to move up and down by cylinders 35 provided on both sides. The cylinder 35 has a cylinder cylinder 35a attached to a frame 32a of the auger rotating device 32, and a distal end of a piston rod 35b connected to the frame 31a of the casing press-fitting device 31. A casing press-fitting device 31 is provided on the piston rod side flange 35c of the cylinder cylinder 35a.
The first guide cylinder 24 is provided in the direction of the frame 31a. Around the piston rod connecting portion of the frame 31a of the casing press-fitting device 31, a second guide cylinder 25 which is directed toward the frame 32a of the auger rotating device 32 is provided.
The second guide tube 25 is slidably inserted into the first guide tube 24. As a result, similarly to the first embodiment, even when a lateral load or an eccentric load occurs, the load is not directly applied to the piston rod 35b by receiving the load by the first guide cylinder 24 and the second guide cylinder 25. Further, there is no need for the first guide cylinder 24 to cover the pipes connected to the body of the cylinder cylinder 35a.
Since the diameter is substantially the same as a, the planar dimension of the casing press-fitting device 31 does not increase. As described above, the guide cylinder structure for a cylinder of a construction machine according to the present invention has a first guide cylinder provided on the piston rod protruding / retracting side of the cylinder cylinder of the cylinder, and a peripheral portion of the piston rod connecting portion. Provided with a second guide cylinder,
Since the second guide cylinder is slidably inserted into the first guide cylinder, no lateral load or eccentric load acts directly on the piston rod of the cylinder, and the first guide cylinder is connected to the body of the cylinder cylinder. There is no need to cover the piping, and the diameter of the first guide cylinder is almost the same as the diameter of the cylinder cylinder, so that the planar size of the working device does not increase. Therefore, the workability in a narrow site is not reduced, and the weight increase is slight, so that the stability of the pile driver is not affected.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an enlarged sectional view showing a main part of a first embodiment of the present invention. FIG. 2 is a sectional view of a casing rotation drive unit. FIG. 3 is a front view of a casing rotation drive unit. FIG. 4 is a side view of a pile driver. FIG. 5 is a front view of a boring machine according to a second embodiment of the present invention. FIG. 6 is a plan view of the same. FIG. 7 is a cross-sectional view of a conventional guide cylinder structure. DESCRIPTION OF SYMBOLS 4 ... Casing rotation drive device, 6 ... Pile driver, 11 ... Main frame, 17 ... Casing chuck device, 18 ... Chuck frame, 19 ... Chuck cylinder, 19a ... Cylinder cylinder, 19b ... Piston rod, 19d ... Plumbing,
Reference numeral 20: chuck member support frame, 21: chuck member, 24: first guide cylinder, 25: second guide cylinder, 30 ...
Underground construction method machine, 31 ... Casing press-in device, 32 ... Auger rotating device, 35 ... Cylinder, 35a ... Cylinder cylinder, 35
b ... Piston rod

Claims (1)

(57) Claims 1. In a construction machine having a frame of a working device, a cylinder provided on the frame, and another frame lifted and lowered by the cylinder, a cylinder cylinder of the cylinder is provided. The first guy whose outer diameter is slightly larger than the outer diameter of
A cylinder is provided on the piston rod side of the cylinder cylinder, and
While fixed to the flange of the cylinder barrel, said cylinder
The second guide tube consisting of an outer diameter of approximately the outer diameter Da tube, only set around the piston rod connecting portion, the first gas and the second guide tube
A guide cylinder structure for a cylinder of a construction machine, which is slidably inserted into an id cylinder .