JP2002088755A - Tubing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tubing device, by which the generation of noises and vibrations in the case of the release of a casing is prevented and the enlargement or the like of a device by the increase of rigidity is prevented. SOLUTION: In the tubing device 10, the tubing device has an intermediate frame 12 with a rotary drive mechanism, by which the rotation of a motor 31 is transmitted through a speed reducer 33 and rotation in high torque is output from a cylindrical cone 32, and a lifting-lowering frame 13 with a chuck mechanism gripping the casing 1 under the state, in which a chuck 41 is inserted between the casing 1 inserted while being penetrated to the cone 32 and the cone 32, the lifting-lowering frame 13 is supported by a thrust jack 20 in a manner that the frame 13 can be lifted and lowered, the intermediate frame 12 is supported slidably by the thrust jack 20 on the lower side of the frame 13, and the intermediate frame 12 and the lifting-lowering frame 13 are connected by a chuck cylinder 44.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tubing apparatus for press-fitting and pulling out casings and steel pipe piles used for foundation work such as construction and civil engineering.

[0002]

2. Description of the Related Art In foundation works such as construction and civil engineering, for example,
An all-casing method in which a cylindrical casing is pushed into the ground while excavating earth and sand, and the soil in the casing is discharged and concrete is poured into the casing, or a steel pipe pile rotating and burying method in which a steel pipe pile is driven into a foundation pile. Yes, a tubing device is used to rotationally press a casing or a steel pipe pile into the ground. There are various types of tubing devices, and some include a chuck mechanism for holding a casing or the like with a wedge-shaped chuck. Therefore, two types of conventional tubing devices having a chuck mechanism will be briefly described.

FIG. 2 is a sectional view of a tubing apparatus showing a first conventional example. This tubing device 10
Reference numeral 0 denotes a lifting frame 102 and a chuck frame 103 supported by four thrust jacks 110 erected on a base frame 101. In the thrust jack 110, a first guide cylinder 112 is slidably fitted on a post 111 fixed to the base frame 101, and a second guide cylinder 113 is slidably fitted on the first guide cylinder 112. First
The guide cylinder 112 moves up and down. Therefore, the elevating frame 102 fixed to the first guide cylinder 112 moves up and down by the expansion and contraction of the thrust cylinder 114, and the elevating frame 102 and the chuck cylinder 120
Similarly, the chuck frame 103 connected by the above moves up and down.

On the other hand, the chuck frame 103 fixed to the second guide cylinder 113 moves up and down with respect to the elevating frame 102 due to the expansion and contraction of the chuck cylinder 120 to move the wedge-shaped chuck 121 rotatably suspended up and down. Can be. Therefore, the lowered chuck 121 is provided with a casing, a steel pipe, or the like (hereinafter simply referred to as “casing”).
1) and the cone 122 which is a rotating cylindrical body, and the casing 1 is gripped. Also, corn 1
Reference numeral 22 denotes a motor 12 provided on the lifting frame 102.
3 is transmitted via the speed reducer 124 and the chuck 1 is rotated.
Rotation is given to the casing 1 gripped by 21. In the tubing device 100, the thrust jack 110 and the motor 123 are driven to rotate and press-fit the gripped casing 1.

Next, FIG. 3 is a sectional view of a tubing device showing a second conventional example. This tubing device 20
Numeral 0 indicates that the lifting frame 202 is supported by four thrust jacks 210, 210... The thrust jack 210 has a guide cylinder 212 attached to a post 211 fixed to the base frame 201.
Are slidably fitted, and the guide cylinder 212 moves up and down by expansion and contraction of the thrust cylinder 213.

Therefore, the elevating frame 20 fixed to the guide cylinder 212 is expanded and contracted by the expansion and contraction of the thrust cylinder 213.
2 is raised and lowered, and the cone 221 suspended from the lifting frame 202 by the chuck cylinder 220 is similarly raised and lowered. Further, a chuck 222 for holding the casing 1 is rotatably suspended from the elevating frame 202 while being inserted between the casing 1 and the cone 221, and the casing 1 is gripped by raising the cone 22. . The motor 222 is attached to the chuck 222.
23 is transmitted via a speed reducer 224. In the tubing device 200, such a thrust jack 21
By driving the motor 0 and the motor 223, the gripped casing 1 can be pushed into the ground while rotating.

[0007]

However, these conventional tubing apparatuses 100 and 200 have the following problems. First, in the tubing apparatus 100 of the first example shown in FIG. 2, the inserted chuck 121 is pulled out when the gripped casing 1 is released. At this time, the casing 1 may be lifted by the chuck 121. . In particular, in the initial stage of the construction, the casing 1 is press-fitted in a small amount and is sufficiently supported by the ground, so that the chuck 1 is easily lifted by an upward frictional force accompanying the pulling out of the chuck 121. The casing 1, which has been lifted even slightly, is released and falls, generating noise and vibration. Such an operation of releasing the grip of the casing 1 is performed for each one stroke of the thrust jack 110. Therefore, if noises and vibrations are repeatedly generated in an initial stage of construction, people in the surrounding area will feel uncomfortable.

Next, the tubing apparatus 200 of the second example shown in FIG. 3 has a structure in which the cone 221 side is lowered without substantially changing the upper and lower positions of the chuck 222, and thus does not have the problem as in the first example. However, since the tubing device 200 transmits the rotation of the motor 223 to the chuck 222 to apply rotation to the casing 1, the rotation reaction force acts on the rigid link 225 and the bearing 226 connected to the chuck 222. Therefore, in order to increase the rigidity, it is necessary to strengthen the members such as the link 225, and there has been a problem that the device is large and heavy. Furthermore, since a rotational reaction force acts on the fixed upper end of the lifting frame 202 on the thrust jack 210, the bending moment acting on the thrust jack 210 is large, so that the device is large in terms of increasing the rigidity of the thrust jack 210, There was a problem that it became heavy.

In order to solve such problems, the present invention eliminates noise and vibration generated when the casing is released.
An object of the present invention is to provide a tubing device that avoids an increase in the size of the device due to increased rigidity.

[0010]

A tubing device according to the present invention comprises: an intermediate frame having a rotation drive mechanism for transmitting rotation of a motor via a speed reducer and outputting high-torque rotation from a cylindrical cone; A casing inserted through the cone and a lifting frame provided with a chuck mechanism for gripping the casing with a chuck inserted between the cone, the lifting frame is supported by a thrust jack so as to be able to move up and down. , The intermediate frame
The thrust jack is slidably supported below the elevating frame, and the intermediate frame and the elevating frame are connected by a chuck cylinder. Further, in the tubing device of the present invention, it is preferable that the intermediate frame is attached so as to slide a lower portion of the thrust jack.

According to the tubing device of the present invention, when the casing is gripped / released, the intermediate frame is moved up and down by the chuck cylinder and the cone is moved up and down with respect to the chuck, so that the chuck is moved almost without moving the chuck up and down. Pressing and separating the three members is performed by inserting the three members into the cone. Therefore, when the gripping by the chuck is released, the casing and the like are not lifted up together, and the problem of noise and vibration is solved. Further, since the rotational force for rotating the casing is directly applied to the chuck by the rotation of the cone provided on the intermediate frame, it does not apply to a support member such as a link hanging the chuck. Therefore, the members do not become large in order to increase the rigidity, and the apparatus does not become large. Further, the thrust jack also receives a rotational reaction force from the intermediate frame, so that the bending moment is reduced, and it is possible to avoid an increase in the size of the thrust jack due to increased rigidity. In particular, since the bending moment becomes smaller as the intermediate frame is located on the lower side, it is preferable to attach the lower part of the thrust jack so as to slide.

[0012]

Next, an embodiment of a tubing device according to the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view showing a tubing device of the present embodiment. In the tubing apparatus 10, four thrust jacks 20, 20... Are erected at four corners on a base frame 11, and thereby an intermediate frame 12 and a vertically movable frame 13 which are arranged one above the other are movably mounted thereon. The base frame 11, the intermediate frame 12, and the elevating frame 13 are all formed with holes having a diameter that allows the casing 1 to penetrate therethrough, and the thrust jack 20,
20 are supported vertically so that the holes are coaxially overlapped.

In the thrust jack 20, a post 21 is fixed to the base frame 11, and an elevating frame 13 is fixed to an upper end of a first guide cylinder 22 which is slidably fitted to the post 21. A second guide cylinder 23 is slidably fitted to the first guide cylinder 22, and the intermediate frame 12 is fixed to the second guide cylinder 23. Further, the thrust jack 20 is provided with a thrust cylinder 24 as a driving means in such a guide member, and its piston rod 24a is
1 is pin-connected to the support bracket 21a fixed to
The lid 22a of the cylinder tube 24b is
2 is fixed to the upper part.

Subsequently, the motor 3 is mounted on the intermediate frame 12.
1 is provided, and a rotation drive mechanism for transmitting rotation from a reduction gear 33 to a cone 32 disposed along the periphery of the hole through a pinion gear 34 and an idler gear 35 is provided. The cone 32 is rotatably attached to the intermediate frame 12 by a bearing 36, and a gear 32 a is formed on the outer periphery of the cone 32 and meshes with the idler gear 35. The cone 32 is
And a plurality of tapered grooves 32b that are inclined so that the diameter becomes smaller downward. A plurality of chucks 41 are arranged on the same circumference so as to fit between the tapered groove 32b and the casing 1.

The chuck 41 has a wedge shape having inclined surfaces of the same angle so as to slide upright in the tapered groove 32b. The chuck 41 constitutes a chuck mechanism for gripping the casing 1 in a state inserted between the casing 1 and the cone 32, and includes a bearing 42 and a link 43 to move the lifting frame 13.
Is suspended. The outer ring of the bearing 42 is fixed to the elevating frame 13, and the chuck 41 is journaled via a link 43 connected to the rotating inner ring. Accordingly, the chuck 41 is rotatably mounted by the bearing 42 and is mounted to be displaceable in the horizontal direction by the link 43.

A plurality of chuck cylinders 44 for raising and lowering the intermediate frame 12 with respect to the lifting frame 13 are connected between the intermediate frame 12 and the lifting frame 13 in order to raise and lower the chuck 41 thus mounted. ing. The chuck cylinder 44 has a piston rod 44a mounted on the intermediate frame 12, and a cylinder tube 44b mounted on the lifting frame 13.

Next, the tubing device 1 having such a configuration will be described.
The operation of 0 will be described. First, the casing 1 inserted into the tubing device 10 is gripped. For this purpose, after the casing 1 is inserted into the tubing device 10 disposed at the construction position so as to pass through the holes of the frames 11, 12, and 13, the chuck cylinder 44 is driven to extend the piston. The rod 44a is contracted. Then, the second guide cylinder 23 becomes the first guide cylinder 22
, The intermediate frame 12 is pulled up, and the cone 3
As a result, the chuck 41 is inserted into the tapered groove 32b. At this time, a horizontal component force acts on the chuck 41 in the axial direction of the casing 1 by a tapered surface that slides between the cone 32 and the casing 1 is held by the plurality of chucks 41, 41. Is done.

Next, rotational press-fitting is performed on the casing 1 thus gripped. As for the rotation, the rotation output of the motor 31 is reduced by the speed reducer 33, and the rotation is transmitted to the cone 32 via the pinion gear 34 and the idler gear 35, so that the cone 32 is given a high torque rotation. Therefore, when the cone 32 rotates, rotation is given to the casing 1 gripped by the chuck 34 via the chuck 41 fitted in the tapered groove 32b. The press-fitting is performed by driving the thrust jack 20, and the operation for one stroke of the thrust cylinder 24 is repeated a plurality of times. Therefore, the press-fitting operation for one stroke will be described.

At the time of press-fitting, the elevating cylinder 24 is moved to the cylinder tube 2 when the extended piston rod 24a is contracted.
4b is lowered, the first guide cylinder 22 fixed to the cylinder tube 24b slides on the post 21, and the first
The elevating frame 13 fixed to the guide 22 is pulled down. Then, the gripped casing 1 is pushed into the ground. Therefore, at the time of press-fitting of the casing 1, rotation is given to the casing 1 from the motor 31,
The one-stroke contraction operation of the lift cylinder 24 causes the cylinder to be pressed into the ground by that distance.

Such rotation press-fitting is repeated after the one-stroke contraction operation of the lift cylinder 24 is completed.
The chuck cylinder 44 drives the piston rod 44a in the extending direction, whereby the intermediate frame 12 is pushed down. Therefore, the cone 32 descends, and the chuck 41 that hardly moves up and down is pulled out from between the cone 32 and the casing 1, and the grip of the casing 1 is released. Next, in the thrust jack 20, when the piston rod 24a of the elevating cylinder 24 is extended, the elevating frame 13
Frame 12 connected to chuck frame 44 by chuck cylinder 44
Is raised. Then, the casing 1 is further gripped on the upper side by the same operation as described above, and rotational press-fitting is performed.

Next, in the all-casing method, the earth and sand inside the casing 1 is discharged while the casing 1 is press-fitted in this way, a reinforcing bar is built therein, and the casing 1 is pulled out and collected while pouring concrete. Therefore, subsequently, the pulling out of the casing 1 will be described.
Like the press-fitting, the pull-out is also performed by driving the lifting cylinder 24, and the operation for one stroke is repeated a plurality of times. Therefore, the one-stroke extracting operation will be described.

At the time of pulling out, first, the chuck cylinder 4
4, the cone 32 is raised, and the cone 32
The casing 1 is grasped by inserting the chuck 34 between the casing 1 and the casing 1. And
The piston rod 24a of the lifting cylinder 24 is extended,
The cylinder tube 24b is pushed up, and the lifting frame 13 fixed integrally with the first guide cylinder 22 rises.
At this time, since the intermediate frame 12 is connected to the lifting frame 13 by the chuck cylinder 44, the intermediate frame 12 moves up together with the lifting frame 13. Therefore, the gripping state in which the chuck 41 is inserted between the cone 32 and the casing 1 is maintained, and the casing 1 is pulled out by that distance by the extension operation of the lifting cylinder 24 for one stroke.

The repetition of the pull-out operation is performed after the elongating operation of the lift cylinder 24 for one stroke is completed.
The intermediate frame 12 is driven by driving the chuck cylinder 44.
Of the cone 32 is pushed down,
In this state, the chuck 41 is pulled out from between the casing and the casing 1, and the grip is released. Then, the piston rod 24a of the lift cylinder 24 is contracted, and the lift frame 13 and the chuck cylinder 44 are attached to the lift frame 13.
The intermediate frame 12 connected by the arrow moves down together. The lower side of the casing 1 is gripped again by the same operation as described above, and the pulling-out operation is continued.

Therefore, the tubing device 1 of the present embodiment
0, the gripping and release of the casing 1 is controlled by the cone 3
2 is moved up and down so that the chuck 41 directly contacts the casing 1.
Is hardly moved up and down, so that the casing 1 is not lifted at the time of release, and noise and vibration generated by the lifting are eliminated. Further, since the motor 31 is provided on the intermediate frame 12 to transmit the rotation to the cone 32, there is no portion where the rigidity is a problem, and the position of the intermediate frame 12 receiving the rotational reaction force is low. 20
The bending moment acting on the element becomes smaller, and it is no longer necessary to increase the rigidity. As a result, the tubing device 10 itself can be reduced in size and weight.

It should be noted that the present invention is not limited to the above embodiment, and various changes can be made without departing from the spirit of the present invention.

[0026]

According to the present invention, the lifting frame is supported by a thrust jack so as to be movable up and down, the intermediate frame is slidably supported by the thrust jack below the lifting frame, and the intermediate frame and the lifting frame are chucked by a chuck cylinder. As a result, it is possible to provide a tubing device in which noise and vibration are not generated when the casing is opened, and the size of the device is not increased due to an increase in rigidity.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of a tubing device according to the present invention.

FIG. 2 is a sectional view of a tubing device showing a first conventional example.

FIG. 3 is a sectional view of a tubing device showing a second conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Casing 10 Tubing apparatus 12 Intermediate frame 13 Elevating frame 20 Thrust jack 31 Motor 32 Cone 33 Reduction gear 41 Chuck 44 Chuck cylinder

Claims (2)

[Claims] 1. The method according to claim 1, wherein the rotation of the motor is transmitted through a speed reducer.
An intermediate frame having a rotation drive mechanism for outputting high-torque rotation from a cylindrical cone, and a chuck mechanism for gripping the casing with a chuck inserted between the cone and the casing inserted through the cone. An elevating frame provided with: The elevating frame is supported by a thrust jack so as to be able to move up and down, and the intermediate frame is slidably supported by the thrust jack below the elevating frame,
A tubing device, wherein the intermediate frame and the lifting frame are connected by a chuck cylinder. 2. The tubing device according to claim 1, wherein the intermediate frame is attached so as to slide on a lower portion of the thrust jack.