JP3042955U - Steel pipe pile lifting jig - Google Patents

Abstract

(57) Abstract: A lifting jig that is easy to handle without damaging the threads of a steel pipe pile having a threaded joint at the pipe end, particularly a steel pipe pile having a female thread. SOLUTION: By attaching a hoisting jig that avoids a threaded portion to a female thread side and fastening and fixing it to an end pipe wall of a steel pipe pile by bolts, it is possible to hook a steel pipe pile by hook Allows hanging.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a hoisting jig for steel pipe piles, and is particularly used for handling steel pipe piles having screw joints.

[0002]

[Prior art]

 In the handling of steel pipe piles with screws such as steel pipe piles for landslide countermeasures or foundation piles constructed in narrow places for urban areas, conventionally, in order to prevent damage to the threaded parts, suspension fittings as shown in Fig. 6 were used. 41 is welded near the ends of the steel pipe pile 20 and hoisted, or as shown in FIG. 7, a ring of a nylon sling 50 is hung near both ends of the steel pipe pile 20 and hoisted by a hoisting tool 52. there were. As shown in Fig. 6 and Fig. 7, in the method of welding the suspension fittings or suspending with the nylon sling 50, it is necessary to attach the suspension fittings to each steel pipe pile and to load the steel pipe piles with sleepers when temporarily placing them. There is a problem and it takes time. In a pipe that does not use a screw joint, a hook 30 as shown in FIG. 5 is often hooked on the pipe walls at both ends of the steel pipe pile as shown in FIG. This hook 30 has a rubber lining 32 inside a U-shaped hook 31, and has a shackle 35 having a pin 34 and its engaging portion 33 at one end of the U-shaped hook. Of these hanging methods shown in FIGS. 4 to 7, it was preferable to use the hooks shown in FIGS. 4 and 5 from the viewpoint of workability in the field.

[0003]

[Problems to be solved by the device]

 However, it was not possible to adopt the hook method for steel pipe piles having a threaded joint at the pipe end, especially for steel pipe piles having internal threads, because the thread portion is damaged by the hooks. Therefore, an object of the present invention is to provide a lifting jig that is easy to handle without damaging the screw. INDUSTRIAL APPLICABILITY The present invention is applied to a steel pipe pile with a screw, which is developed by the present applicant and has a guide portion having the same diameter as the screw bottom diameter at the pipe end.

[0004]

Means for Solving the Problems The present invention provides a hoisting jig for a steel pipe pile having a threaded joint, in which a hoisting jig that avoids a threaded portion is attached to a female screw side, and an end pipe of the steel pipe pile is attached by a bolt. By fastening it to the wall, it is possible to hang it by hooking steel pipe piles, which was impossible until now.

That is, the present invention is a jig for lifting a steel pipe pile by locking the end of a steel pipe pile with a screw having a guide portion having the same diameter as the screw bottom diameter at the pipe end. A U-shaped frame having a depth deeper than the dimension to the base of the screw, a receiving seat provided at the bottom of the U-shaped frame for receiving the guide portion, and an inner end provided at one of the open ends of the U-shaped frame. A steel pipe pile comprising a projection protruding in a direction and a tightening mechanism which is provided on the other side of the open end of the U-shaped frame and clamps and fixes a pipe wall between the projection and the U-shaped frame. It is a lifting jig.

In this hoisting jig, a receiving seat abuts on a guide portion which is a non-threaded portion of a pipe end, and a tightening mechanism clamps a pipe wall in a deeper part than a root of the screw, and a steel pipe pile is formed at these two points. Since it is attached to the end of the, it does not damage the screw at all. And because it is a hook type, it is easy to work on site. An inward projection on one of the open ends of the U-shaped frame of this jig completely prevents other parts of the U-shaped frame from contacting the threaded parts during mounting and removal.

It is preferable that the tightening mechanism can be realized by a simple mechanism if it is configured by a female screw that penetrates the other side of the opening end of the U-shaped frame in a transverse manner and a bolt that is screwed into the female screw. Also, if the lifting shackle is attached to the U-shaped frame on the line of action between the receiving seat in the U-shaped frame and the lifting sling that hangs this lifting jig, the lifting can be done in a well-balanced manner, and the lifting ability can be improved. You can maximize it.

[0008]

[Embodiment of the invention]

 Hereinafter, the main points of the present invention will be described with reference to the drawings. FIG. 1 shows a state where the lifting jig 1 of the embodiment is attached to a steel pipe pile 20 having a female screw 23. The receiving seat 3 provided at the bottom of the U-shaped frame 2 is in contact with and receives the guide portion 24 at the pipe end portion of the steel pipe pile 20. On one side of the opening end of the U-shaped frame 2, a U-shaped opening side projection 5 is projected inwardly of the U-shape and is in contact with the inner surface 21 of the steel pipe pile 20. A fastening mechanism 13 is attached to the other top 6 of the open end of the U-shaped frame. The tightening mechanism 13 is composed of a bolt 10 that is screwed to the top 6 so as to face the protrusion 5, and a pad 11 that is attached to the tip of the bolt 10. For tightening the steel pipe pile 20, the bolt 10 is a steel pipe. The pad 11 is pressed against the outer surface 22 of the pile 20 and is sandwiched between the pad 11 and the protrusion 5. A female screw threaded to the screw 12 of the bolt 10 is provided across the top 6 of the U-shaped frame 2. The hoisting jig 1 is fixed to the steel pipe pile 20 at two points, that is, the receiving seat 3 and the projection 5, and the side wall inner surface recessed portion 4 of the U-shaped frame does not contact the screw 23 of the steel pipe pile at all and damages the screw 23. There is no such thing.

The shackle 7 is most ideally provided on the working line 14 of the sling for lifting the steel pipe pile. The action line 14 is a line connecting the receiving seat 3 and a crane hook (not shown). The sling line of action 14 may have a suspension angle θ of 30 degrees or more with respect to the horizontal line. Although the other end of the steel pipe pile 20 is not shown in FIG. 1, since a male screw is provided on the outer periphery of the steel pipe pile 20 in place of the lifting jig 1, the conventional hook 30 shown in FIG. May be used.

FIG. 2 is a side view of the lifting jig of the embodiment, and FIG. 3 is a plan view thereof. Reference numerals 1 to 12 are the same as those in FIG. In the embodiment shown in FIGS. 2 and 3, the dimensions are a = 320 mm, b = 220 mm, c = 95 mm, d = 25 mm, and the bolt diameter is 15 mmφ, and the weight of the lifting jig 1 is 11.2 ( Kg). This hoisting jig 1 can be used up to a weight of 5 ton of steel pipe pile and a length of 18 m at a hoisting angle θ = 30 ° or more. When the lifting jig 1 is attached, the shackle 7 is used to lift the lifting jig 1.

[0011]

[Effect of the invention]

 According to the present invention, the steel pipe pile can be easily, safely and surely lifted up, and when constructing the threaded steel pipe pile having the excellent performance targeted by the present invention, it is highly efficient and greatly contributes. .

[Brief description of the drawings]

FIG. 1 is an explanatory view showing a state where a lifting jig of an embodiment is attached to an end portion of a steel pipe pile.

FIG. 2 is a side view of the lifting jig of the embodiment.

FIG. 3 is a plan view of a lifting jig of an example.

FIG. 4 is an explanatory view of lifting of a conventional steel pipe pile.

FIG. 5 is an explanatory view of a conventional hook for lifting a steel pipe pile.

FIG. 6 is an explanatory view of lifting of a conventional steel pipe pile.

FIG. 7 is an explanatory view of lifting of a conventional steel pipe pile.

[Explanation of symbols]

 1 Lifting jig 2 U-shaped frame 3 Receiving seat 4 Side wall concave portion of U-shaped frame 5 Projection at the open end of the U-shaped frame 6 Top part of the other open end of the U-shaped frame 7 Shackle 8 Pin 10 Bolt 11 Pad 12 Screw 13 Tightening mechanism 14 Action line 20 Steel pipe pile 21 Inner surface 22 Outer surface 23 Screw 24 Guide portion 30 Hook 31 Hook 32 Rubber lining 33 Engagement portion 34 Pin 35 Shackle 41 Suspension metal fitting 50 Sling 52 Lifting tool

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Kenichi Yamamoto 1-1, Kawasaki-cho, Handa-shi, Aichi Prefecture, Chita Works, Kawasaki Steel Co., Ltd. (72) Masanori Shimizu 1-1-chome, Kawasaki-cho, Handa-shi, Aichi Kawasaki Steel Works Co., Ltd. Chita Works (72) Koichi Okita 1-1, Kawasaki-cho, Handa City, Aichi Prefecture Kawasaki Steel Co., Ltd. Chita Works

Claims (3)

[Utility model registration claims] 1. A jig for suspending a steel pipe pile with a screw having a guide portion having the same diameter as the screw bottom diameter at the pipe end to lift the steel pipe pile from the pipe end to the root of the screw. U-shaped frame having a depth deeper than the dimension, a receiving seat provided in the bottom of the U-shaped frame for receiving the guide portion, and an inwardly projecting protrusion provided at one of the open ends of the U-shaped frame. And a tightening mechanism that is provided on the other side of the open end of the U-shaped frame and clamps and fixes the tube wall between the projection and the U-shaped frame. 2. The hoisting jig for a steel pipe pile according to claim 1, wherein the tightening mechanism is a female screw that transversely penetrates the other side of the opening end of the U-shaped frame and a bolt that is screwed into the female screw. . 3. The hoisting jig for a steel pipe pile according to claim 1, wherein the hoisting shackle is attached to a U-shaped frame on a line of action between the receiving seat and the hoisting sling hoisting the hoisting jig.