JP2000265459A - Pile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To certainly connect piles to each other in a fall-stopping state while reducing working cost smaller without taking much trouble for connecting work. SOLUTION: A cylinder part 1 is provided on one pile end part, a shaft part 2 is provided on the other pile end part, an inward groove part 5 along a peripheral direction is formed on a cylinder part inner peripheral surface 1a of the cylinder part 1, and an outward groove part 6 along a peripheral direction is formed on a shaft part outer peripheral surface part 2a of the shaft part 2 so as to face against the inward groove part 5. Thereafter, the cylinder part 1 and the shaft part 2 of adjoining piles A fitted on each other are made free to be connected to each other by providing a first screw part 19 to be screwed and fitted in a through hole 16 on one of them, providing a second screw part 20 to be screwed and fitted on a divided key member 12 on the other and fitting the divided key member 12 in a state of straddling in the inward groove part 5 and in the outward groove part 6 by a key operating member S forming the first screw part 19 and the second screw part 20 inverse helical.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a pipe provided at one end of a pile and a shaft at the end of the other pile, and the pipe and the shaft of a pile adjacent to each other in the pile axis direction. The present invention relates to a connection structure for piles, which are configured to be connectable to each other in a state where they can be prevented from coming off.

[0002]

2. Description of the Related Art The connection structure of a pile is provided with a cylinder and a shaft at an end of the pile so that the pile can be buried in the ground at a desired length. The shaft portion and the shaft portion can be connected to each other in a retaining state. Conventionally, a cylindrical portion having an inner peripheral surface of a cylindrical portion having a female screw portion, and a shaft portion having a male screw portion. A shaft portion having an outer peripheral surface is provided, and the cylindrical portion and the shaft portion are screw-fitted with each other so that adjacent piles can be connected to each other in a state where they cannot be removed.

[0003]

According to the above conventional connection structure of piles, it is necessary to gradually move the piles close to each other while rotating them relative to each other to screw the cylinder part and the shaft part together. When the pile itself is large and heavy, the connection between the male and female threads is likely to occur during screwing. There is a drawback that the work cost is likely to increase because the work is more troublesome.

[0004] The present invention has been made in view of the above-mentioned circumstances, and it is intended to reduce the work cost without taking a great deal of labor for the connection work, and to make it possible to connect the piles securely in a state where they cannot be removed. The purpose is to do.

[0005]

According to a first feature of the present invention, a pile is provided at one end of a pile and a shaft is provided at the other end of the pile, so that piles adjacent to each other in the pile axis direction are provided. A pile configured so that the tubular portion and the shaft portion can be connected to each other in a state where they can be prevented from coming off from each other, and an inward groove along the circumferential direction is formed on the inner peripheral surface portion of the tubular portion of the tubular portion. An outer groove along the circumferential direction is formed on the outer peripheral surface of the shaft of the shaft so as to face the inward groove of the inner peripheral surface of the cylinder fitted to the outer peripheral surface of the shaft. A plurality of divided key members formed around the axis of the pile are housed inside the inner peripheral surface portion and a plurality of through holes communicating from the outer peripheral surface of the cylindrical portion into the inward groove portion are provided. , One of which is provided with a first screw portion which is screwed into the through hole, and the other is provided with the divided portion. A key operation member provided with a second screw portion which is screw-fitted to the member, and wherein the first screw portion and the second screw portion are formed as reverse screws, each of the divided key members being connected to the cylindrical portion. A push operation is performed from the outer peripheral surface to the outward groove portion side through the through hole, and the divided key members are fitted so as to straddle the inward groove portion and the outward groove portion, and are adjacently fitted to each other. The pipe portion and the shaft portion of the pile are configured so as to be freely connected in a retaining state.

A feature of the invention according to claim 2 is that a first screw portion to be screw-fitted into the through hole is formed only at one end of one of the key operation members.

According to the first aspect of the present invention, an inward groove is formed in the inner peripheral surface of the cylindrical portion along the circumferential direction, and the outer peripheral surface of the shaft of the shaft is formed. An outward groove along the circumferential direction is formed so as to face the inward groove of the cylindrical inner peripheral surface fitted to the shaft outer peripheral surface, and the inner groove is formed in the inward groove from the cylindrical inner peripheral surface. Also accommodates a plurality of divided key members formed around the axis of the pile in a state of entering the inside, a plurality of through holes communicating from inside to outside in the inward groove portion from the outer peripheral surface of the cylindrical portion, one of the through holes A first screw portion for screw fitting is provided, and a second screw portion for screw fitting to the split key member is provided on the other side,
And a key operation member in which the first screw portion and the second screw portion are formed as reverse screws, and each of the divided key members is moved from the outer peripheral surface of the cylindrical portion to the outward groove side through the through hole. Push-in operation to fit the split key member in a state of straddling the inward groove and the outward groove to prevent the cylindrical portion and the shaft portion of the adjacent piles fitted to each other from coming off. The split key member can be fitted in a state of straddling between the inward groove portion and the outward groove portion with a small pressing operation. That is, instead of the conventional configuration in which the piles are connected by screwing and fitting, a configuration in which the piles are connected by fitting of a key member has been proposed. Then
As shown in FIGS. 9, 10 (a) and (b), the inward groove 5
In addition, a plurality of through-holes 16 penetrating the inner side and the cylindrical portion outer peripheral surface 1b are formed at equal intervals in the circumferential direction, and female portions are formed in portions of the respective through holes 16 facing the cylindrical portion outer peripheral surface 1b. A threaded portion 17 is formed, and a key operation member S for pushing out the divided key member 12 housed in the inward groove portion 5 toward the outward groove portion 6 is screwed, and the screw operation of these key operation members S is performed. Then, it is conceivable that each divided key member 12 is separately pushed out to the outward groove 6 side and moved to be fitted into the outward groove 6 side. Can be fitted so as to straddle the inside of the inward groove 5 and the inside of the outward groove 6, but the end of the key operation member S is pressed against the divided key member 12 to advance the key operation member S. Simply push the split key member 12 to the outward groove 6 side by operation Since the operation can be only a distance which extruded a key operating member S is screwed split key member 12
Is pushed into the outward groove 6 side, so that not only the pushing operation is troublesome, but also the split key member 12 housed in the inward groove 5 before the cylindrical portion 1 and the shaft portion 2 are fitted.
However, there is a problem that the split key member 12 which is easily pushed out from the inward groove portion 5 and cannot be returned once the key member 12 is pushed into the outward groove portion 6 side.
When the pitch of the screw of the screw portion and the pitch of the screw of the second screw portion are set to be the same, when the key operation member is rotated once by the screwing operation of the key operation member, the key operation member is pushed by one rotation by the first screw portion. At the same time, the split key member is pushed out to the outward groove portion by one rotation by the second screw portion which is a reverse screw to the first screw portion, and as a result, the split key member is rotated outward by two rotations. Will be pushed out
Not only can the split key member be pushed into a desired position with a small pushing operation, but also because the second screw portion is screw-fitted to the split key member, the split key member accommodated in the inward groove portion faces inward. Since it is possible to prevent falling off from the groove and to return the pushed-in split key member, it is possible to separate the shaft portion and the cylinder portion of the pile once connected. As a result, since the operability of the connection operation for securely connecting the cylindrical portion and the shaft portion in the retaining state can be improved, the operation cost can be reduced without much labor for the connection work, and the connection of the pile can be performed. It is also possible to cancel.

According to the characteristic configuration of the second aspect of the present invention, in addition to achieving the function and effect of the first aspect of the present invention, the key operating member has a first screw portion that is screwed into the through hole. Since it is formed only at one end of one of the two, the operation of inserting the key operating member into the through hole becomes easy. That is, when the male screw portion is provided over the entire length like the key operation member shown in the comparative example, the screwing operation of moving the key operation member to a predetermined position with respect to the divided key member is performed. It was necessary to perform the operation from the tip of the key operation member, which was troublesome, but in this case, the first screw portion can be inserted as it is until the female screw portion provided in the through-hole is reached. Work can be reduced. As a result, the insertion operation of the key operation member becomes faster,
Workability can be improved.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a pile according to the present invention will be described below with reference to the drawings.

FIG. 1 shows a configuration in which a cylindrical tube portion 1 is provided at one pile end and a small-diameter cylindrical shaft portion 2 is provided at the other pile end, so that piles A adjacent to each other in the pile axis X direction are provided. Tube part 1 and shaft part 2
Shows a pile A for preventing landslides, which is configured to be freely connected to each other in a retaining state. The pile A is suspended by a crane or the like, and excavated in advance on the ground while connecting a required number of piles A. It is inserted into the vertical hole, and the hollow portion E and the outer periphery of the pile are filled with a filler such as concrete so that the ground can be reinforced.

The stake A is connected to one end of a cylindrical cast steel pipe D cast by a centrifugal casting method with a cast steel pipe box joint B having a cylindrical portion 1 and welded to the other end of the cast steel pipe D. A pin joint C having the shaft 2 is welded to the end to form a cylindrical shape having a substantially constant outer diameter over the entire length, and the box joint B is directed upward into the ground. It is configured to be buried.

Next, a procedure for connecting the piles A that are vertically adjacent to each other will be described with reference to FIG. As shown in FIG. 2A, the cylindrical portion 1 of the lower pile A2 is held upward, and each of the divided key members 12 is placed in each inward groove 5 of the cylindrical portion 1 more than the cylindrical inner peripheral surface portion 1a. The upper pile A1 is housed in a state of being inserted into the inside, and the upper pile A1 is held substantially coaxially with the lower pile A2 with its shaft portion 2 facing downward.

Next, the upper stake A1 is lowered, and FIG.
As shown in (b), the shaft portion 2 is connected to the cylindrical portion 1 of the lower pile A2.
Fits.

Next, as shown in FIG. 2C, the key inner peripheral surface 14 is formed in the outward groove 6 over the entire circumference by the screwing operation of each push bolt 18 (an example of the key operation member S). The divided key member 1 is brought into contact with the groove bottom surface 13 until the pushing bolt 18 cannot be screwed in the pushing direction.
2 to the outward groove 6 side, as shown in FIG.
The piles A are connected to each other in a retaining state.

The inner peripheral surface portion 1a of the cylindrical portion 1 includes:
As shown in FIG. 3, a plurality (two in the present embodiment) of inward grooves 5 along the circumferential direction in a cross-sectional view along each pile axis X.
Is formed in a series of annular shapes around the pile axis X, and the groove depth F of each inward groove portion 5 is set such that the entirety of the key member 11 described later enters inside the cylindrical inner peripheral surface portion 1a. It is formed to a depth that can be accommodated by.

The outer peripheral surface portion 2a of the shaft portion 2 has the same length as that of the inner peripheral surface portion 1a of the cylindrical portion, and is closely connected to the inner peripheral surface portion 1a of the opposing cylindrical portion. Are formed to have a constant outer diameter, and the cylindrical portion 1 and the shaft portion 2 of the vertically adjacent pile A are configured to be freely fittable.

A plurality (two in this embodiment) of outwardly extending grooves 6 along the circumferential direction in cross section along the pile axis X are fitted to the shaft outer peripheral surface 2a in the shaft outer peripheral surface 2a. A series of annular shapes are formed around the pile axis X so as to face the inward grooves 5 of the cylindrical inner peripheral surface 1a, and as shown in FIG. The key member 11 is fitted over the groove 6 so that the cylindrical portions 1 fitted to each other are fitted.
And the shaft portion 2 are connected in a state where they cannot be removed.

The key member 11 is composed of a plurality (six in this embodiment) of divided key members 12 around the pile axis X. Each divided key member 12 is made of steel having a rectangular cross section. Of the elongated body of the outwardly facing groove portion 6 by bending the long body in an arc shape.
The curvature of the key inner peripheral surface 14 facing the third side along the circumferential direction is
The outward groove 6 is formed so as to have the same curvature along the circumferential direction of the groove bottom surface 13.

Then, as shown in FIG.
Each of the divided key members 12 housed in a state in which the divided key members 12 are inserted into the inner side of the inner peripheral surface portion 1a of the cylindrical portion 1 is pushed from the outer peripheral surface of the cylindrical portion 1 to the outward groove portion 6 side by the operation means 15 which can be operated freely. Then, it is moved to a state in which it fits into the groove, and is fitted in a state of straddling the inward groove 5 and the outward groove 6.

The groove depth G of the outward groove 6 is formed so as to be half the thickness t of the divided key member 12 in the radial direction of the pile, and the key inner peripheral surface 14 is formed over the entire circumference. Each split key member 12 fitted over the inward groove portion 5 and the outward groove portion 6 in a state of contacting the groove bottom surface 13 of the facing groove portion 6 in the pile axis X direction with respect to the inward groove portion 5. Each split key member 12 is fitted over the inward groove 5 and the outward groove 6 such that the overlap area and the overlap area in the pile axis X direction with respect to the outward groove 6 are substantially the same. is there.

The operation means 15 will be described. As shown in FIGS. 6 (a) and 6 (b), each of the plurality of inwardly extending grooves 5 penetrates the inner side and the outer peripheral surface of the cylindrical portion (in the present embodiment, as shown in FIGS. 6) through-holes 16 are formed at equal intervals in the circumferential direction, and a female screw 17 is formed in a portion of each through-hole 16 facing the outer peripheral surface of the cylindrical portion. A first screw portion 19 provided on an extrusion bolt 18 for pushing the key member 12 toward the outward groove 6 is screwed into the female screw portion 17, and a second screw portion 20 is provided.
Into the female screw portion 21 of the split key member 12,
When these push bolts 18 are screwed forward, the first screw portion 19 and the second screw portion 20 are formed as reverse screws.
8 itself moves toward the outward groove 6 and the second
Since the divided key members 12 are individually pushed out to the outward groove portions 6 by the screw portions 20, the divided key members 12 can be moved into a state of being fitted into the outward groove portions 6 by a small screwing operation.

Also, the second screw portion 20 is
Of the inward groove 5
Can be prevented from falling off from the inward groove portion 5 of the divided key member 12 housed in the groove. Therefore, the push bolt 18
Not only can the split key member 12 be pushed out to the outward groove 6 side by the screwing operation, but also the split key member 12 fitted over the inward groove 5 and the outward groove 6 for some reason. Can be moved toward the inward groove portion 5 and pulled out from the outward groove portion 6. 22 in the figure
Denotes an operation unit (for example, a hexagonal hole, a groove for a driver, etc.) for screwing the push bolt 18.

[Another Embodiment] Another embodiment will be described below. <1> The number of divided key members and through-holes is not limited to the six described in the above embodiment, and it is sufficient if both are two or more, and the numbers are arbitrary. <2> The number of the inward groove portions and the outward groove portions is not limited to the two described in the above embodiment, and it is sufficient if both are at least one, and the numbers are arbitrary. <3> The inner peripheral surface of the cylindrical portion and the outer peripheral surface of the shaft portion are not limited to the one-stage fitting described in the above embodiment, but may be one or more stages, and the number is arbitrary. For example, as shown in FIG. 7, the cylindrical inner peripheral surface 1a is formed in a stepped shape having a larger diameter toward the pile end, and the shaft outer peripheral surface 2a is arranged in a shape that fits into the cylindrical inner peripheral surface 1a. It may be formed in a stepped shape. <4> Further, as described above, the shape in which the shaft outer peripheral surface portion 2a and the cylindrical inner peripheral surface portion 1a are fitted is not limited to a step-like shape. For example, as shown in FIG. The peripheral surface portion 1a is formed with a taper surface having a larger diameter toward the pile end, and the shaft outer peripheral surface portion 2a is formed with a taper surface having a smaller diameter toward the pile end where the shaft outer peripheral portion 2a is arranged in a shape to be fitted to the cylindrical inner peripheral surface portion 1a. But it is good.

In the claims, reference numerals are provided for convenience of comparison with the drawings, but the present invention is not limited to the attached drawings by the entry.

[Brief description of the drawings]

FIG. 1 is a partially sectional side view of a pile showing one embodiment of the present invention.

FIG. 2 is a longitudinal sectional view illustrating an operation of connecting a cylindrical portion and a shaft portion according to an embodiment of the present invention.

FIG. 3 is a cross-sectional view showing a mounted state of a key member according to an embodiment of the present invention.

FIG. 4 is a cross-sectional view showing a connection state between a cylindrical portion and a shaft portion according to an embodiment of the present invention.

FIG. 5 is an essential part cross-sectional view showing a mounted state of the key member according to the embodiment of the present invention;

FIG. 6 is a sectional view of an essential part for explaining the operation of the key member showing one embodiment of the present invention.

FIG. 7 is an essential part cross-sectional view for explaining an operation of connecting a cylindrical portion and a shaft portion of another embodiment.

FIG. 8 is an essential part cross-sectional view for explaining an operation of connecting a cylindrical portion and a shaft portion of another embodiment.

FIG. 9 is a cross-sectional view of a main part showing a mounted state of a key member of a comparative example.

FIG. 10 is an essential part cross-sectional view for explaining the operation of the key member of the comparative example.

[Explanation of symbols]

 Reference Signs List 1 cylindrical portion 1a cylindrical portion inner circumferential surface portion 1b cylindrical portion outer circumferential surface portion 2 shaft portion 2a shaft portion outer circumferential surface portion 5 inward groove 6 outward groove 12 divided key member 16 through hole 19 first screw portion 20 second screw portion S key operation member X pile shaft core A pile

Continued on the front page (72) Inventor Masanori Katayama 1-1-1 Nakamiya Oike, Hirakata-shi, Osaka F-term in Kubota Hirakata Factory 2D041 AA02 DB02 DB13 DB14

Claims (2)

[Claims] 1. A tubular part (1) is provided at one pile end and a shaft part (2) is provided at the other pile end, so that the tubular parts of the piles (A) adjacent in the pile axis direction. (1) and the shaft (2)
(A) which are configured to be freely connected to each other in a state where they can be prevented from coming off, and wherein the inner peripheral surface of the cylindrical portion (1) of the cylindrical portion (1) is provided.
a), an inward groove (5) extending in the circumferential direction is formed, and an outward groove (6) extending in the circumferential direction is formed on the outer peripheral surface (2a) of the shaft of the shaft (2). Outer peripheral surface (2
a) formed so as to face the inward groove portion (5) of the inner peripheral surface portion (1a) fitted in the inner peripheral surface portion (1a) in the inward groove portion (5). A plurality of divided key members (12) formed around the pile axis (X) are housed in the state of being inserted, and a through hole communicating from the outer peripheral surface (1b) of the cylindrical portion to the inside of the inward groove (5) is provided. A plurality of (16) are provided, one of which is provided with a first screw portion (19) which is screw-fitted into the through hole (16), and the other is a second screw portion (which is screw-fitted with the split key member (12)). 20), and the first screw portion (19) and the second screw portion (2).
0) is a key operation member (S) formed with a reverse screw, and each of the divided key members (12) is connected to the outer peripheral surface (1) of the cylindrical portion.
b) from the through-hole (16) to the outward groove (6) side.
The split key member (12) is fitted into the inward groove (5) and the outward groove (6) in a state of being pushed in through the inward groove (5), and the adjacent piles (A) fitted to each other are fitted. A) a pile configured so that the tubular portion (1) and the shaft portion (2) can be freely connected in a retaining state. 2. A first screw fitting into said through hole (16).
The stake according to claim 1, wherein the screw portion (19) is formed only at one end of one of the key operation members (S).