JP3913100B2 - Tubing device chuck collar - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a chuck capable of gripping a casing or the like having a different diameter by adjusting the position of a gripping surface in a tubing device that performs press-fitting / pulling while rotating a casing or a steel pipe pile held by a chuck mechanism. The present invention relates to a removable chuck collar.
[0002]
[Prior art]
Tubing devices are used to drive casings and steel pipe piles in the construction of foundation piles in civil engineering and architectural foundation work. FIG. 4 is a plan view showing such a tubing device. In the tubing device 80, a casing or a steel pipe pile is inserted through a central through hole, and the casing or the like is gripped and rotated, and is pushed downward to perform rotary press-fitting into the ground. At that time, a plurality of wedge-shaped chucks 81 arranged on the same circumference are used as a chuck mechanism for gripping the casing, and the chuck 81 is inserted into a cylindrical cone 82 and a casing (not shown) or the like. It is inserted and held between.
[0003]
That is, the chuck 81 moves in the center direction by sliding the taper groove 82a formed inside the cone 82, the diameter of the gripping surface 81a is reduced by the circumference, and the casing or the like is pressed toward the center. Grasped.
By the way, since a casing and a steel pipe pile with different diameters are used in construction of a foundation pile or the like according to construction, a chuck collar 91 corresponding to such a casing with different diameters is used in the tubing device 80. That is, the chuck collar 91 is used when the circumference by the gripping surface 81a of the chuck 81 is used as a reference diameter and a casing or the like having the reference diameter or less is applied.
[0004]
Here, FIG. 5 is also a plan view showing the tubing device 80, but shows a case where a chuck collar 92 corresponding to a steel pipe pile having an extremely small diameter is attached. 4 and 5, when the chuck collars 91 and 92 are attached to the gripping surface 81a of the chuck 81, the gripping position is determined by the size of the circumference of the gripping surfaces 91a and 92a. The size of possible casings and the like can be adjusted.
[0005]
Therefore, if such chuck collars 91 and 92 are prepared, a diameter of a standard diameter corresponding to the chuck collar 91 shown in FIG. The steel pipe pile corresponding to the chuck collar 92 shown in FIG. 5 and the extremely small diameter can be constructed by a single tubing device 80.
[0006]
[Problems to be solved by the invention]
However, although the chuck collar 92 corresponding to an extremely small diameter steel pipe pile or the like is used only occasionally and occasionally, it is necessary to prepare it for the construction, cost and transportation. And inefficient. In particular, the chuck collar 92 is extremely long in size and thus requires manufacturing costs and requires a transportation space.
Further, when the chuck collars 91 and 92 are switched, each of them must be once removed from the chuck 81 and replaced, which is very troublesome.
[0007]
Further, when the chuck collar 92 is used, there is a problem that the steel pipe pile 100 is deformed as shown in FIG. That is, the tubing device 80 receives rotational resistance when the steel pipe pile 100 is rotationally press-fitted into the ground. In that case, the chuck collar 92 is tilted by a large moment on the gripping surface 92a side that restricts rotation and the chuck 81 side that receives excessive force in the rotational direction because the dimension in the radial direction is long. At this time, the gripping surface 92a is also inclined in the rotational direction, and a large load that causes deformation of the steel pipe pile 100 is concentrated and acts.
[0008]
Therefore, in order to solve the above-described problems, the present invention reduces the cost of the chuck collar, provides a chuck collar for a tubing device that is easy to work and convenient for transportation, or causes deformation of a small-diameter steel pipe pile or the like. It is an object of the present invention to provide a chuck collar of a tubing device that is not allowed to occur.
[0009]
[Means for Solving the Problems]
The chuck collar of the tubing device according to the present invention is a chuck in which a tubing device for rotationally press-fitting a gripped casing or the like into the ground presses and grips the casing or the like in the axial direction by a plurality of chucks arranged on the same circumference. A first chuck collar that is fixed to the chuck and further in the radial direction with respect to the first chuck collar in order to adjust the gripping position according to the diameter of the casing or the like. Alternatively, two or more chuck collars are stacked and attached.
[0010]
Therefore, according to the present invention, it is possible to construct a casing or the like having a different diameter by replacing the chuck collar with a single tubing device, and when the first chuck collar is usually installed and the construction is further performed. When constructing a small-diameter casing or the like, the construction can be performed simply by attaching a small-diameter chuck collar on the first chuck collar. Accordingly, since it is not necessary to provide a separate chuck collar for each diameter of the casing or the like, the cost can be reduced, and the replacement work is easy and convenient for transportation.
[0011]
The chuck collar of the tubing device according to the present invention comprises the first chuck collar directly attached to the chuck and the second chuck collar attached to every other chuck chuck collar. The second chuck collar fixed to one of the first chuck collars is also applied to the first chuck collar adjacent to the fixed first chuck collar.
[0012]
Therefore, according to the present invention, the adjacent first chuck collar that is not related to gripping of a steel pipe pile or the like even if a large moment due to the rotational reaction force acts on the chuck collar in which the first and second chuck collars are integrated. Since the second chuck collar is hooked and the inclination is supported, the biased force does not act on the gripping surface, and it is possible to avoid the deformation of the steel pipe pile or the like as in the prior art.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Next, an embodiment of the chuck collar of the tubing device according to the present invention will be described below with reference to the drawings. FIG. 1 is a plan view showing a tubing device. This tubing device 1 is provided with a chuck mechanism similar to that of the conventional example, and rotationally press-fits a gripped casing, steel pipe pile or the like into the ground. In the tubing device 1, as shown in the drawing, eight first chuck collars 2 that can be directly attached to eight chucks 25, and four second chuck collars 2 that can be attached to the first chuck collar 2. A chuck collar 3 is prepared.
[0014]
First, the structure of the tubing device 1 will be briefly described. Here, FIG. 2 is a sectional view showing the tubing device 1. In the tubing device 1, four elevators 10 are erected on a lower frame 11, and thereby a gear frame 12 and a chuck frame 13 arranged vertically are attached to be movable up and down. In the elevator 10, a first guide cylinder 16 is slidably fitted to a post 15 fixed to the lower frame 11 from the outside, and a second guide cylinder 17 is further slid from the outside to the first guide cylinder 16. It fits in as possible.
[0015]
In such a guide, an elevating cylinder 18 is put, its piston rod is pin-coupled to the post 15 side, and a cylinder tube is fixed to the upper end of the first guide cylinder 16. A gear frame 12 is fixed to the first guide cylinder 16 and a chuck frame 13 is fixed to the second guide cylinder 17, and can be moved up and down with respect to the lower frame 11 by driving an elevating cylinder 18.
[0016]
The gear frame 12 and the chuck frame 13 are connected by four chuck cylinders 21, and the chuck frame 13 moves up and down with respect to the gear frame 12 by the expansion and contraction operation of the chuck cylinder 21. In the lower frame 11, the gear frame 12, and the chuck frame 13, a hole through which a casing or the like can pass is formed in the center, and the gear frame 12 is provided with a cone 22 that can rotate in accordance with the hole. The gear frame 12 is further provided with a hydraulic motor 23 (see FIG. 1), and its rotational output is transmitted to the cone 22 via the reduction gear, and the cone 22 is rotated at a high torque. .
[0017]
A tapered groove 22 a is formed on the inner peripheral surface of the cylindrical cone 22 corresponding to the chuck 25. The chuck mechanism of the tubing device 1 is such that a wedge-shaped chuck 25 is inserted between the taper groove 22a and the casing, and the casing is gripped by the pressing force of the chuck 25 moving in the center direction. . The chuck 25 is connected to a link 27 suspended through a bearing 28 and is suspended so as to be rotatable with respect to the chuck frame 13.
[0018]
Next, the chuck collars 2 and 3 prepared in the tubing device 1 are such that the first chuck collar 2 is directly attached to the chuck 25, and the second chuck collar 3 is overlapped with the gripping surface 2 a of the first chuck collar 2. It is attached. Moreover, the number of the second chuck collars 3 is set to four so that the area of each gripping surface 3a is not reduced, and the second chuck collars 3 are attached to the first chuck collar 2 at intervals.
[0019]
Each of the first chuck collar 2 and the second chuck collar 3 has a planar structure as shown in FIG. 1 and a hollow structure having a height as shown in FIG. The first chuck collar 2 has its mounting surface 2b abutted against the gripping surface 25a of the chuck 25 and fixed with bolts, and the second chuck collar 3 has its mounting surface 3b abutted against the gripping surface 2a of the first chuck collar 2. And bolted. In this case, in particular, as shown in FIG. 1, the second chuck collar 3 is formed with a fixing surface 3b wider in the circumferential direction than the gripping surface 2a of the first chuck collar 2, and this is the first chuck collar on both sides. 2 and 2 are held on the gripping surfaces 2a and 2a.
[0020]
Subsequently, the rotary press-fitting of the casing, the steel pipe pile and the like by the tubing device 1 (see FIG. 2) is performed first, and then the casing and the steel pipe pile are inserted through the frames 11, 12, 13, The casing and the like are gripped by the chuck mechanism. For this, the chuck cylinder 21 is contracted, the chuck frame 13 is lowered with respect to the gear frame 12, and the chuck 25 slides in the tapered groove 22 a of the cone 22. Therefore, if the chuck collars 2 or 3 are attached to the chuck 25, the chuck collars 2 and 3 are moved together in the central direction, the diameter of the gripping surfaces 25a, 2a and 3a due to the circumference is reduced, and the casing or the like It is pressed from the outside and gripped.
[0021]
Since the casing and the like thus gripped are transmitted with high torque rotation from the hydraulic motor 23 to the cone 22 via the reduction gear, the cone 22 and the chucks 25 and 25 or the first and second chuck collars 2 and 3 are connected to each other. Rotation is given through. At this time, since the elevator 10 is contracted and the gear frame 12 and the chuck frame 13 are simultaneously lowered, the rotating casing or the like is pushed down and rotationally pressed into the ground.
[0022]
Therefore, in the tubing device 1 having the first and second chuck collars 2 and 3, it is possible to construct a reference diameter casing or the like that is directly gripped by the chuck 25 without the first and second chuck collars 2 and 3. If the first chuck collar 2 and further the second chuck collar 3 are attached to the chuck 25, it is possible to construct a casing, a steel pipe pile or the like having a diameter by the circumference of each gripping surface 2a, 3a. In particular, in the chuck collars 2 and 3 of the present embodiment, for example, the first chuck collar 2 is usually attached by the tubing device 1 to construct an intermediate diameter casing, and the second chuck collar 3 is sometimes required to have a small diameter. Even when the casing has to be constructed, the second chuck collar 3 need only be attached in a stacked manner, and the operation is very simple because it is not necessary to remove the first chuck collar 2.
[0023]
In addition, according to the chuck collars 2 and 3 of the present embodiment, it is not necessary to separately provide a small-diameter chuck collar that is long in the radial direction as in the prior art, so that the cost can be reduced and a large transportation space is provided. It is convenient for transportation because it is not necessary.
[0024]
Furthermore, according to the second chuck collar 3, the conventional problem of deforming the steel pipe pile 100 as shown in FIG. 6 could be solved. When constructing small-diameter steel pipe piles, the first and second chuck collars 2 and 3 are attached as shown in FIG. 1, but in this case, tilting can be prevented even when a large moment is applied. It is. That is, when the fixed surface 3b of the second chuck collar 3 hits the gripping surface 2a of the adjacent first chuck collar 2 and tries to tilt, the second chuck collar 3 is supported at the contacted position. . Therefore, the load does not act on the gripping surface 3a pressing the steel pipe pile as in the conventional case, and the deformation of the steel pipe pile can be prevented.
[0025]
As mentioned above, although one embodiment was mentioned and demonstrated about the chuck | zipper collar of the tubing apparatus, this invention is not limited to this, A various change is possible in the range which does not deviate from the meaning.
For example, in the above-described embodiment, since the object is a hollow steel pipe pile or the like, the object for preventing the inclination of the chuck collar has been described, but there is no problem of deformation when it is a solid rod. . Therefore, when the object is a solid rod, the same type of second chuck collar 4 having a different size may be attached to the first chuck collar 2 as shown in FIG. According to this, it is not possible to prevent the tilt, but, as in the above embodiment, since the first chuck collar 2 is not required to be removed, the work is very simple, the cost is low, and the chuck collar is convenient for transportation. can do.
[0026]
【The invention's effect】
The present invention provides a first chuck collar fixed to a chuck to adjust a gripping position in accordance with a diameter of a casing or the like, and one or more chuck collars in the radial direction with respect to the first chuck collar. As a result, the cost of the chuck collar was reduced, and it became possible to provide a chuck collar for a tubing device that is easy to work and convenient for transportation.
[0027]
In addition, the present invention includes a first chuck collar that is directly attached to the chuck and second chuck collars that are attached to the first chuck collar every other one. Since the fixed second chuck collar is also applied to the first chuck collar adjacent to the fixed first chuck collar, the chuck collar of the tubing device that prevents deformation of a small-diameter steel pipe pile or the like is provided. It became possible to provide.
[Brief description of the drawings]
FIG. 1 is a plan view of a tubing device showing an embodiment of a chuck collar.
FIG. 2 is a cross-sectional view of a tubing device showing an embodiment of a chuck collar.
FIG. 3 is a plan view of a tubing device showing an embodiment of a chuck collar.
FIG. 4 is a plan view of a tubing apparatus showing a conventional chuck collar.
FIG. 5 is a plan view of a tubing apparatus showing a conventional chuck collar.
FIG. 6 is a view showing a deformation state of a steel pipe pile by a chuck collar.
[Explanation of symbols]
1 Tubing Device 2 First Chuck Collar 3 Second Chuck Collar 22 Cone 25 Chuck

Claims (2)

A tubing device that rotationally press-fits a gripped casing or the like into the ground includes a chuck mechanism that presses and grips the casing or the like in the axial direction by a plurality of chucks arranged on the same circumference,
In order to adjust the gripping position according to the diameter of the casing or the like, a first chuck collar fixed to the chuck is further overlapped with one or more chuck collars in the radial direction on the first chuck collar. A chuck collar for a tubing device characterized by being attached. In the chuck collar of the tubing device according to claim 1,
The first chuck collar that is directly attached to the chuck, and the second chuck collar that is attached to every other chuck chuck collar,
A chuck collar for a tubing device, wherein the second chuck collar fixed to one of the first chuck collars is also applied to the first chuck collar adjacent to the fixed first chuck collar. .

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