JP2549184Y2 - Casing positioning device in rotary tubing device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a rotary tubing apparatus for chucking a casing tube such as a steel pipe pile at a predetermined position in civil engineering, construction, etc., and pushing it into the ground while rotating in one direction or reciprocatingly. The present invention relates to a casing positioning device for vertically positioning a casing tube at a predetermined pushing position and chucking the casing tube.

[0002]

2. Description of the Related Art Conventionally, an annular support base is supported so as to be vertically movable for pushing and rotatably driven in a horizontal plane, and, for example, six chuck pieces are synchronously mounted on the annular support base in the radial direction on the same horizontal plane. In a rotary tubing device that is supported so as to be able to move forward and backward with the same stroke, a method of chucking the casing vertically to the center (predetermined pushing position) of the tubing device is as follows. Then, each chuck piece is advanced synchronously the same distance to approach the outer peripheral surface of the casing, and in this state, the distance between each chuck piece and the outer peripheral surface of the casing is checked, and the casing is craneed in the direction of the larger distance. The distance between each chuck piece and the outer peripheral surface of the casing is equal. A method of crimping is performed finally casing outer peripheral surface of each chuck piece at Ku turned position.

[0003]

However, the above-mentioned conventional method has the drawback that the operation is extremely complicated, it takes a long time to position the casing, and the actual operation requires considerable skill.

An object of the present invention is to perform a casing positioning chuck with a simple operation in a short time.

[0005]

As a means for solving the above-mentioned problems, the present invention provides an annular support capable of enclosing a casing, in which three or more main chuck members on the same horizontal plane are surrounded by an outer periphery of the enclosing casing. In a rotary tubing device including a main chuck mechanism supported so as to be able to move forward and backward so as to be brought into contact with and separated from a surface, and a pushing mechanism and a rotary driving mechanism, a center of the annular support is passed below the main chuck mechanism. A plurality of pairs of a pair of sizing cylinders and long cylinders diametrically opposed on the same horizontal plane with the center on the vertical line being independently movable between the sizing and long cylinders independently in the radial direction. In addition to supporting the auxiliary chuck mechanism, an auxiliary chuck mechanism is provided at the tip of the ram of each cylinder. The present invention proposes a casing positioning device in a rotary tubing device, wherein the stroke is such that an auxiliary chuck member abuts on the outer peripheral surface of a casing having an axis centered on a vertical line, and the stroke of the long cylinder is longer than the stroke of the fixed cylinder. .

The driving means for moving the main chuck member of the main chuck mechanism in the present invention moves the wedge member in and out of the main chuck member by driving a hydraulic cylinder, and moves the main chuck member directly by driving the hydraulic cylinder. Advancing and retreating, various other driving means are used,
In this case, the main chuck members are not limited to be moved forward and backward by the same distance synchronously, but may be moved independently of each other.

[0007]

1, 2, 3 and 4, push-in jacks (2) of a casing push-in mechanism are vertically provided at four corners of a rectangular frame base base (1), and the jacks (2). ,
A hydraulic cylinder (4) is inserted into a telescopic cylinder (3) having an outer cylinder slidably fitted to an inner cylinder fixed to the base stand (1), and one end of the cylinder (4) is connected to the inner cylinder. The distal end of the cylinder ram (5) is connected to one end of the telescopic tube (3) and the other end of the telescopic tube (3), respectively. An annular gear case (6) having hollow protrusions (7) and (7) in the diameter direction is horizontally fixed, and a main chuck mechanism for chucking the casing is mounted on the gear case (6).

The structure of the main chuck mechanism is as follows.
One end of a chuck driving hydraulic cylinder (9) is connected to brackets (8) (four in this example) projecting from the outer surface of the gear case (6), and stands up. (10) An annular lifting frame (1
1) is connected to and supported by a bracket (12)... At an appropriate interval above the gear case (6), and a substantially short cylindrical upper part is mounted on the lifting frame (11) and the gear case (6). And an annular main chuck support comprising a lower support ring (13) and (14) is rotatably supported, of which the upper support ring (13) is connected to the lifting frame (11).
The lower support ring (14) is rotatably supported inside and inside the gear case (6) through a bearing (15), and the lower support ring (14) is concentric with the upper support ring (13) in the gear case (6). The upper and lower support rings (13) and (14) are rotatably supported via bearings (16).
In this example, six pairs of chuck pressing plates (17) and (17 ') are fixed at equal intervals on the upper and lower opposing surfaces, and one upper chuck pressing plate (17). On the inner surface of the chuck guide groove (19) consisting of a flat T-shaped groove having a chuck pressing inclined surface (18) extending downward and inclined outwardly as a bottom surface, and the other lower chuck pressing plate (17 '). ) Are provided with the same chuck guide grooves (19 ') having chuck pressing inclined surfaces (18') extending upward and inclined outward, respectively, and these upper and lower pairs of chuck guide grooves (19) are formed. ) (19 '), ... are engaged with a double wedge-shaped main chuck piece (20).

The main chuck pieces (20) are of a substantially rectangular disk shape, the inner surface of which is a curved chuck surface corresponding to the outer peripheral surface of the casing (C), and the outer surface of which is a double inclined roof surface having both upper and lower flows. The wedge surfaces (21) and (21 ') are formed on the left and right ends of the inclined wedge surfaces (21) and (21').
2 ′) are projected, and the slide pieces (22), (22) of the chuck piece (20) are inserted into the guide grooves (19) of the upper chuck pressing plate (17). The strips (22 ') and (22') are slidably engaged with and supported by the guide grooves (19 ') of the lower chuck pressing plate (17'), respectively.
(21 ') upper and lower chuck pressing plates (17),
(17 ') chuck pressing inclined surface (18), (18')
Slidably in contact with

Therefore, when the lifting frame (11) is moved up and down by moving the hydraulic cylinders (9) for jack driving, the chuck pressing plates (17) (1)
7 ′) are vertically separated or approached, and their chuck pressing inclined surfaces (18) (18 ′), and the double inclined wedge surfaces (21) (21 ′) of each chuck piece (20). Pressing inward or outward while sliding, the chuck pieces (20) are synchronously moved in the radial direction so as to contact and separate from the outer peripheral surface of the casing (C).

Incidentally, the lifting frame (11) is shown in FIG.
A T-shaped slide bar (23) projecting from the outer peripheral surface of the T-shaped groove is vertically laid on the outer peripheral surface of the outer cylinder of each telescopic cylinder (3) in the pushing jack (2). By engaging with the rails (24), respectively, the stability at the time of elevating is maintained.

As the casing rotation drive mechanism, an annular large gear (25) is fixed to the outer peripheral surface of the lower support ring (14) in the gear case (6), while the gear case overhangs (7), (7) are provided. ) Are mounted on the casing rotation motors (26), (26), and a small gear (28) (one of which is shown) fixed to an output shaft (27) (one of the output shafts is not shown) in the overhang portion of both motors. Abbreviation) with the above large gear (25)
Are engaged with each other.

Next, the auxiliary chuck mechanism will be described. As shown in FIGS. 3 and 4, the base table (1) is diametrically paired with a center on a vertical center line (V) passing through the centers of the upper and lower support rings (13) and (14). The fixed size cylinder (29) and long cylinder (3
In this example of (0), two pairs are installed on the same horizontal plane, for example, at equal intervals from each other, and rams (31), (31), (32), (32) with the center of each cylinder protruding aside. )
Fixed and long auxiliary chuck plate (33) having a curved chuck surface corresponding to the outer peripheral surface of the casing (C) at the tip of
(33), (34) and (34), and the maximum advance stroke of one of the fixed-size cylinders (29) and (29) is such that the casing (C) is aligned with the vertical center line (V). When the auxiliary chuck plate (33) comes into contact with the outer peripheral surface of the casing (C) when it is located at a position (ie, a predetermined pushing position), the other long cylinders (30), (30) In this example, the maximum advance stroke is appropriately longer than the fixed cylinder (29).

(35) are outriggers extending horizontally from the four corners of the base table (1), and (36) are jacks attached to the outriggers.

An operation of chucking the casing (C) by vertically positioning the casing (C) at a predetermined pushing position using the above-described apparatus will be described. First, the rotary tubing device,
It is installed horizontally on the ground at a position where its vertical center line (V) coincides with the center of the predetermined casing pushing position into the ground. Next, with the main chuck pieces (20)... And the auxiliary chuck plates (33) (33), (34), (34) retracted, the casing (C) is suspended by a crane and the main chuck pieces and the auxiliary chucks are suspended. It is inserted between each of the plates and suspended without grounding at a position near the vertical center line (V). In this state, as a first operation, the main chuck pieces (20) are advanced synchronously by synchronous driving of the chuck driving hydraulic cylinders (9) and the casing (C).
Chuck so that the outer peripheral surface is not overtightened. As a result, the casing (C) slightly inclines (right in FIG. 5) as shown in FIG.
The horizontal axis (S) of the casing (C) crosses the vertical center line (V) on the horizontal plane (H) where Next, as shown in FIG. 2B, the sizing auxiliary chuck plate (33) located on the left side of the casing (C),
When (33) is advanced to the maximum, the chuck plate (33),
The (33) pushes the left outer peripheral surface of the lower end portion of the inclined casing (C) to vertically stand the casing (C). Then, the right-side long auxiliary chuck plates (34) and (34) are advanced to chuck the lower end of the casing (C) between the fixed-size chuck plates (33) and (33). ) The center of the lower end is also located on the vertical center line (V). Next, when the main chuck pieces (20) are sufficiently chucked, the casing (C) is chucked to a predetermined pushing position where its axis (S) coincides with the vertical center line (V).

In the case where the main chuck mechanism in the present invention moves the main chuck members independently of each other, the main chuck members move forward and backward to effectively perform the first operation in the positioning chuck operation. It is preferable to employ a method of providing an appropriate scale for detecting the distance, or providing a mechanism for controlling the advance / retreat distance in each driving means for independently moving each main chuck member.

[0017]

According to the casing positioning device in the rotary tubing device of the present invention, the casing inserted between the main chuck members and between the auxiliary chuck members, the main chuck member, the auxiliary chuck member of the fixed-size cylinder, and the long dimension. By cooperating with the auxiliary chuck member of the cylinder, the casing can be easily and accurately chucked at the predetermined pushing position in a short time.

[Brief description of the drawings]

FIG. 1 is a front view of a rotary tubing device.

FIG. 2 is a plan view of the same.

FIG. 3 is a sectional view taken along line III-III of FIG. 1;

FIG. 4 is an enlarged sectional view taken along line IV-IV of FIG. 2;

FIGS. 5A and 5B are explanatory diagrams of a casing positioning operation. FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Base stand 2 Casing pushing jack 13 Upper support ring 14 Lower support ring 20 Main chuck piece 26 Casing rotation motor 29 Sizing cylinder 30 Long cylinder 33, 34 Auxiliary chuck plate C Casing

Claims (1)

(57) [Scope of request for utility model registration] 1. A main body comprising three or more main chuck members supported on an annular support capable of enclosing a casing on the same horizontal plane so as to be able to advance and retreat so as to be brought into contact with and separated from the outer peripheral surface of the enclosing casing. In a rotary tubing device including a chuck mechanism, a pushing mechanism, and a rotary drive mechanism, diametrically relative to each other on the same horizontal plane, centered on a vertical line passing through the center of the annular support, below the main chuck mechanism. And a plurality of pairs of fixed-size cylinders and long-size cylinders are supported independently of each other between the fixed-size and long-size cylinders so as to be able to advance and retreat in the radial direction. An auxiliary chuck mechanism provided with an auxiliary chuck member is provided, and the sizing cylinder is configured such that, at the time of maximum advance, an outer peripheral surface of a casing having an axis centered on the vertical line. Auxiliary chuck member and abutting the stroke, the Nagasun cylinder was more strokes stroke of the sizing cylinder, casing alignment apparatus in a rotary tubing device.