JP2538036Y2 - Jig for rotating penetration of steel pipe pile - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steel pipe pile, and more particularly to a rotary penetrating jig to be mounted on a head of a steel pipe pile.

[0002]

2. Description of the Related Art Steel pipe piles are often used as foundation piles for civil engineering and construction, along with prestressed concrete piles, cast-in-place concrete piles, and the like. Conventionally, steel pipe piles have been penetrated into the soil by hammering, resulting in noise,
Although there was a drawback that vibration was severe, in recent years, a drill steel pipe pile for improving this and rotating and penetrating has been developed, for example, JP-A-1-94112, JP-A-1-46011, and JP-A-1-46011.
It is disclosed in, for example, Japanese Patent No. 127718.

[0003] Further, as a jig for rotary penetration used by being attached to the head of such a rotary penetration steel pipe pile, Japanese Utility Model Publication No.
No. 956, Japanese Utility Model Laid-Open No. 1-160033, and Japanese Utility Model Laid-Open No. 3-86137. FIG. 3 shows an embodiment of Japanese Utility Model Laid-Open No. 1-160033. In the present invention, a projecting piece 52 is provided at a symmetrical position on the inner surface of the head of a steel pipe pile 51, while an upper part of a jig 60 for rotating penetration is a disk-shaped disk body 62, and a cylindrical member 63 Is connected. When the portion of the panel body 62 is placed on the head of the steel pipe pile 51, the columnar member 63 enters the inside of the steel pipe pile 51, and an L-shaped guide piece 64 provided to extend to the columnar member 63 is attached to the steel pipe pile head. Since it engages with the protruding piece 52 on the inner surface of the part, the steel pipe pile 51 rotates integrally with the rotary penetrating jig 60 by gripping the gripping member 61 on the jig top with an auger machine, and penetrates into the ground. be able to.

The guide piece 64 has two L-shaped and inverted L-shaped pieces facing each other across the width of the protruding piece 52, so that the guide piece 64 can be rotated in the opposite direction when the pile is pulled out. 3-86
FIG. 4 shows an embodiment of Japanese Patent Publication No. 137. The rotary penetrating jig 70 of the present invention is the same as that of FIG. 3 in which the upper part is a disk-shaped disk body 72 and the lower part is connected to the cylindrical member 73, but is similar to that of FIG. A plurality of cut-out windows are provided in 73, and a tooth-shaped clamp 74 is disposed in the cut-in window.A hydraulic cylinder not shown in FIG. The rotational force of the jig is transmitted to the steel pipe pile by the tooth-shaped clamp 74 protruding from the notch window and press-engaged with the inner surface of the steel pipe pile. Therefore, in the present invention, there is no need to provide a projecting piece or the like on the steel pipe pile side.

[0005]

Conventionally, for example, although the citation is omitted, the jig disclosed in Japanese Utility Model Publication No. 61-3956 cannot rotate the steel pipe pile in the reverse direction.
Although the jig disclosed in JP-A-1-160033 is capable of rotating in both directions, a welding operation for attaching a projecting piece to the head of the steel pipe pile was necessary. With the jig disclosed in Japanese Utility Model Laid-Open No. 3-86137, welding work to attach the projecting pieces was not necessary, but a hydraulic source was required at the work site because it was operated with a hydraulic cylinder, and this jig was mounted on an auger machine. This requires connecting the hydraulic hoses, which is an obstacle to remote operation and automation of the work.

An object of the present invention is to provide a jig which solves this problem and can clamp a pile without using a hydraulic operation while maintaining the advantage of being able to rotate in both directions.

[0007]

SUMMARY OF THE INVENTION The present invention relates to a jig used for penetrating a foundation pile while rotating a steel pipe pile, wherein the lower cylindrical member has an outer diameter slightly smaller than the inner diameter of the steel pipe pile. And a casing composed of an upper cylindrical member having an outer diameter slightly larger than the outer diameter of the steel pipe pile and a gripping portion provided on the top thereof, penetrating the upper part of the casing,
An upper sliding shaft inserted vertically and slidably through the center thereof, and abutted or connected to the upper sliding shaft,
A lower sliding shaft in which a stepped portion is mounted on an intermediate portion, and a slide block whose outer peripheral surface is formed in an upwardly expanding shape in a lower portion, and an upwardly extending slope in which an inner peripheral surface is fitted to the slide block. The outer peripheral surface is provided with a clamp shoe that is capable of being pressed and engaged with the inner surface of the steel pipe pile, and is fitted to a notch window provided on a side peripheral surface of the lower cylindrical member,
A clamp block which is movable in the radial direction of the sliding shaft in accordance with the vertical movement of the sliding shaft, and which is inserted into an upper portion of the lower sliding shaft and which is vertically movable by the stepped portion; An opening / closing mechanism for the clamp block, comprising a spring retainer, a spring fitted between the spring retainer and the slide block, and a movably provided centrally from an outer peripheral surface of an intermediate portion of the upper cylindrical member. A stopper that is inserted when the sliding shaft is pressed down, locks the spring retainer to fix the clamp block, and is pulled out when the clamp block is released from being fixed. I do.

[0008]

[Operation] According to the present invention, a jig for rotary penetration is placed on the head of a steel pipe pile, and the upper and lower sliding shafts vertically passing through the center of the casing are pushed downward by using the weight of the auger machine. By doing so, the clamp block advances in the radial direction and engages with the inner surface of the steel pipe pile by pressure contact, and the stopper automatically operates, and the subsequent pressure contact force is held by the action of the spring, so that the steel pipe pile is stably The steel pipe pile can be rotated left and right in any direction.

[0009]

An embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a cross-sectional view showing a state in which the rotary penetrating jig of the present invention is mounted on the head of a steel pipe pile 1 and is connected to an auger machine. Indicates the time when the sliding shaft passing through the center of the jig is pushed downward by using the weight of the auger machine. FIG.
Is the A-A view.

The rotary penetrating jig 10 of the present invention has a casing 11 composed of upper and lower cylindrical members 11A and 11B having different diameters in two upper and lower stages, penetrates the upper part of the casing 11, and vertically passes through the center thereof. Upper and lower sliding shafts 12 and 13, a clamp block 15 fitted in a cutout window 11d of a lower cylindrical member 11B of a casing 11, a clamp block 15 and a lower sliding shaft 13
Slide block 14 inserted between the
13 A spring retainer 18 inserted into the upper part, a spring 17 fitted between the slide block 14 and this spring retainer 18, and a spring 17 provided to be movable from the outer peripheral surface of the intermediate portion of the upper cylindrical member 11A toward the center. And a stopper 19.

The diameter of the lower cylindrical member 11B of the casing 11 is such that it can be inserted with a margin into the steel pipe pile 1 to be cast.
The upper cylindrical member 11A has a diameter slightly larger than the outer diameter of the steel pipe pile 1 and is placed on the head of the steel pipe pile 1 at a stepped portion 11a formed by a different diameter. A guide portion 11b is provided on the outer edge of the step portion 11a so as to extend the upper diameter, thereby facilitating the work of placing the steel pipe pile 1 on the head.

On the top of the casing 11, there is a grip 11c corresponding to the chuck 2 of the auger machine. The grip portion 11c has a hexagonal cross section or the like corresponding to the chuck 2 like a normal auger screw, and the pin 21 is inserted in a horizontal direction to prevent the grip portion 11c from falling. The pin hole provided in 11c needs to be a long hole so that the pin can move up and down.

The upper sliding shaft 12 is provided with a grip 11 on the top of the casing.
When it is pushed down by the weight of the auger machine as shown in the right half of FIG. 1, the spring retainer 18 is pushed downward by the stepped portion 20 provided on the lower sliding shaft 13, The spring 17 is compressed, and through this, the slide block 14 fitted on the lower slide shaft 13 and having an upwardly expanding outer peripheral surface is pushed down. The clamp block 15 fitted to this via an inner peripheral surface that is an upwardly extending slope moves outward because the clamp block 15 is restrained by the cutout window 11d of the casing 11 in the vertical direction. The clamp shoe 16 attached to the surface strongly presses and engages the inner surface of the steel pipe 1. The clamp shoe 16 is preferably made of a material having a high coefficient of friction and low wear, for example, a steel material whose surface is grooved and quenched. Although the above-mentioned upper and lower sliding shafts 12 and 13 are divided into two upper and lower shafts in this embodiment, they may be one continuous shaft.

The opening and closing mechanism for moving the clamp block 15 forward and backward in the radial direction of the sliding shaft in response to the vertical movement of the upper and lower sliding shafts 12 and 13 is not limited to this mechanism, but may be a link mechanism or other various mechanisms. Can be Next, in order to stably maintain this press-fitting engagement state during the pile driving operation, the upper and lower sliding shafts 12,
It is desirable that 13 be fixed in a pressed state. In the present invention, when the spring retainer 18 sinks by a predetermined amount, the stopper 19 which has retreated to the side
By the action of 19a or the like, it advances toward the center and fits into the space above the spring retainer 18. As a result, the spring 17 is held in a compressed state even if the upper and lower sliding shafts 12 and 13 themselves are not always kept pressed down.
The press-fitting engagement between the jig and the steel pipe pile is stable.

When the casting 10 is temporarily completed and the rotary jig 10 is released from the steel pipe pile 1, the sliding shafts 12 and 13 are pushed down again by the weight of the auger machine, and at that moment the stoppers are stopped.
If the 19 is pulled out, the compression force of the spring 17 is released, so that the clamp block 15 retreats. In order to ensure this operation, an auxiliary spring or the like may be provided in this portion.

According to the present invention, a rotary penetrating jig is attached to the chuck portion of the auger machine, and after the pin is fixed to the chuck portion of the auger machine, the auger machine is moved down to apply its own weight. The steel pipe pile can be gripped and released only by using it, which not only eliminates the need for connecting hydraulic hoses, etc. Therefore, even if the pushing force of the auger machine fluctuates instantaneously due to vibration or the like, torque transmission to the steel pipe pile is performed stably without any trouble. It goes without saying that the steel pipe pile can be rotated in both left and right directions.

[0017]

[Effects of the Invention] According to the present invention, not only is welding work for attaching a projecting piece or the like to the steel pipe pile head unnecessary, but also the steel pipe pile can be rotated in both left and right directions, and no hydraulic pressure is required.
Work can be done only by remote control, improving work efficiency and safety.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a configuration of an embodiment of the present invention.

FIG. 2 is an AA view of FIG.

FIG. 3 is a side view showing a conventional example.

FIG. 4 is a plan view showing another conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Steel pipe pile 2 Auger machine chuck 10 Jig for rotation penetration 11 Casing 11A Upper cylindrical member 11B Lower cylindrical member 11a Step 11b Guide 11c Gripping 11d Notch window 12 Upper sliding shaft 13 Lower sliding shaft 14 Slide block 15 Clamp block 16 Clamp shoe 17 Spring 18 Spring holder 19 Stopper 20 Stepped part

Claims (1)

(57) [Scope of request for utility model registration] A jig for use when rotating a steel pipe pile (1) into a foundation ground while rotating the lower cylindrical member (11B) having an outer diameter slightly smaller than the inner diameter of the steel pipe pile (1). ) And an upper cylindrical member (11A) having an outer diameter slightly larger than the outer diameter of the steel pipe pile (1), and a grip (11c) provided on the top of the casing (11). An upper sliding shaft (12) that penetrates the upper portion of 11) and is vertically slidably inserted through the center thereof, and is abutted or connected to the upper sliding shaft (12) to form an intermediate portion. The lower sliding shaft is formed by mounting a stepped part (20) on the lower part and a slide block (14) with the outer peripheral surface expanding upward at the lower part.
(13) and a clamp shoe (16) whose inner peripheral surface is an upwardly sloping inclined surface fitted to the slide block (14) and whose outer peripheral surface is freely press-engaged with the inner surface of the steel pipe pile (1). And a notch window (1) provided on the side peripheral surface of the lower cylindrical member (11B).
1d), a clamp block (15) which is movable in the radial direction of the sliding shaft in response to the vertical movement of the sliding shaft (12, 13), and the lower sliding shaft (13 ) Is inserted into the upper part of the
Spring retainer that can be moved up and down by (20) (18)
And this spring retainer (18) and the slide block
(14) and an opening / closing mechanism for the clamp block (15) comprising a spring (17) fitted between the upper cylindrical member (11A) and an opening / closing mechanism for the clamp block (15). When the slide shafts (12, 13) are pressed down, they are inserted and the spring retainers (18) are inserted.
And a stopper (19) which is pulled out when the clamp block (15) is released from being fixed, and a jig for rotating and penetrating a steel pipe pile. .