JPH0988060A - Screw joint pile joining jig - Google Patents

Abstract

(57) Abstract: An upper member 8a provided with a screw, and a lower member 8b provided with a screw to be screwed into the screw of the upper member 8a and screwed and joined to the upper member 8a in advance. A suspension member provided on the upper member 8a for suspending the joining jig,
The lower pile 8b is provided with a suspension member provided on the lower member 8b to suspend the upper pile. When the upper pile is swung, the lower member 8b is also swung, and the lower pile 1 and the upper pile 2 are screwed and joined together. A joining jig 5 for a screw joint pile, characterized in that the screws provided on the upper member 8a and the lower member 8b are configured to be screwed together so that the intervals are widened. Further, the joining jig 5 having the same screw pitch provided on the pile and the screw pitch provided inside the joining jig 5. Further, the joining jig 5 in which the screws constituting the joining jig 5 are parallel screws.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joining jig for a screw joint pile, which is used when the screw joint pile is suspended and screwed and joined.

[0002]

2. Description of the Related Art Land slide prevention steel pipe piles and steel pipe sheet piles having screw joints (these are collectively referred to as "screw joint piles")
When screwing and joining, it is necessary to do it safely in a short time.

FIG. 3 shows a conventional construction method of suspending a threaded joint steel pipe pile by using a mobile crane 10 and screwing and joining it.

Here, 1 is a lower pile, and a female screw is cut on the inner wall of the upper end portion, and 2 is an upper pile, and a male screw is cut on the outer wall of the lower end portion. 3 is a hanging metal fitting, which is provided on the upper part of the pile in a pair of left and right. 10 is a mobile crane, 11 is a jib which is tilted and slid by the operation of a crane operator. Reference numeral 12 is a wire, 13 is a hanging hook, 14 is a hanging jig, 15 is a chain tong, and 16 is a joining operator. A suspension hook 1 is attached to the tip of the wire 12 drawn out along the jib 11.
3 is attached, and a hanging jig 14 is hung on the hanging hook 13. A suspension load meter (not shown) is provided in the crane vehicle 10 to control the weight of the pile suspended via the wire 12.

The procedure of the screwing and joining work will be described below with reference to FIG. After burying the lower pile 1 in the ground until the upper part protrudes about 1 m from the ground, the upper pile 2 is hung on the hanging jig 14 hung on the wire 12 and conveyed directly above the lower pile 1. To do. The ground joining worker 16 signals the crane driver to lower the upper pile 2, and the crane driver inserts the tip (male screw portion) of the upper pile 2 into the lower pile 1 (female screw portion) according to this signal. After this, after the chain tongs 15 are wound around the upper pile 2, the joining operator 16
Is a method for screwing and joining the upper pile 2 while manually rotating the upper pile 2 in the direction of the arrow (clockwise) while instructing the crane operator to lower the upper pile 2.

[0006]

In such a screw-in joining method, since the upper pile 2 is lowered along with the joining, a crane operation operation for lowering the upper pile 2 in accordance with the descending upper pile 2 is required.

At this time, the crane operator can perform smoother and more accurate joining work if he / she uses the weight management using a suspension load meter together with the operation (adjustment of the descending amount and the descending timing). Skilled driving operation is required to adjust and lower the wire 12 according to the payout length, the amount of lowering per screwing one rotation is minute, work with the upper pile 2 suspended, in other words, It is a work close to the suspended load, and when the upper pile 2 swings, the safety of the joining operator 16 cannot be ensured, and it is necessary to operate by a signal to the crane operator who is away from the joining operator 16. From the above points, it is an unstable work that depends on human factors such as close attention, skill of workers, and communication between workers.

In some cases, the crane operator and the joining operator 16 may not be able to be directly contacted with each other, and it is necessary to join the crane operator and the joining operator 16 in the middle. Furthermore, the ground at the construction site where the landslide prevention steel pipe piles are constructed is soft and has a risk of landslides, and a heavy vehicle such as a crane truck 10 enters the ground to promote landslides. It is desirable to carry out the joint pile work quickly and safely because of poor performance. Further, if a large-scale device is used, workability will be reduced.

The present invention has been proposed in order to solve the above-mentioned problems of the prior art, and enables a quick and safe joint pile work with a simple jig configuration, and the skill of the operator. (EN) A jig for joining a threaded joint pile that is not affected by human factors such as the degree of communication and communication between workers.

[0010]

According to a first aspect of the invention, the upper pile is suspended, and the screw provided on the lower pile is screwed to the screw provided on the lower pile to form the lower pile and the upper pile. A joining jig for a screw joint pile used when screwing and joining, wherein an upper member provided with a screw and a screw to be screwed into the screw of the upper member are provided, and the upper member is preliminarily screwed and joined. The lower member comprises a lower member, a suspension member provided on the upper member for suspending the joining jig, and a suspension member provided on the lower member for suspending the upper pile. Also, the lower pile and the upper pile are screwed and joined together, and the screws provided on the upper member and the lower member are configured to be screwed together to widen the gap, and the joint fixing of the screw joint pile is characterized. It is a tool.

As described above, the joining jig for the threaded joint pile is made to have a simple structure, and the upper member and the lower member are previously screwed together,
Also, since the upper pile is suspended by this screwing,
The lower pile and the upper pile are screwed and joined by being swung easily by a small force, for example, human power of a joining operator.

At this time, since only the lower member rotates with the upper pile in the joining jig, as the upper pile descends as the lower pile and the upper pile are screwed and joined, the upper member and the lower member are joined together. These spaces increase as they are screwed together. As a result, although the upper pile is suspended by a crane or the like, since the lower end and the upper end of the upper pile are supported by being screwed together, it is possible to significantly reduce the lateral shake during the joining work. Safety is secured.

The invention according to claim 2 is a joining jig for a screw joint pile, characterized in that the screw pitch provided on the lower pile and the upper pile is the same as the screw pitch provided on the upper member and the lower member. is there.

By making the screw pitches the same,
Since the lowering distance and the lowering speed of the upper pile per one rotation, and the lowering distance and the lowering speed of the lower member when the distance between the upper member and the lower member increases,
There is no need for a signal between the welding operator and the operator of the crane, etc. (signal of the descending distance and the descending timing), which allows quick and smooth joint pile work, and the skill level of the operators and the operator's skill It becomes possible to carry out the joining work without being affected by human factors such as communication.

According to a third aspect of the present invention, there is provided a joining jig for a threaded joint pile, characterized in that the screws of the upper member and the lower member constituting the joining jig are parallel screws.

Since the threaded length (which increases according to the standard as the pipe diameter increases) depends on the pipe diameter of the pile, the descending distance of the upper pile due to the screw-in connection changes. On the other hand, with the joining, the distance between both members increases, and the screwing distance (length) decreases. Especially when both members are composed of taper screws, even if the screwing distance (length) is sufficiently secured,
Since the taper length does not contribute to the joining, the tape easily escapes. In this way, when it comes out, the upper part of the upper pile loses its support, is unstable, and is very dangerous.

As a countermeasure against this, by using parallel threads, it is possible to prevent the threaded portion of the lower member from coming off from the threaded portion of the upper member, and ensure the safety of the welding operator.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an embodiment of a joining jig for a screw joint pile according to the present invention. Here, 5 is a joining jig, 6 and 7 are wires, 8a is an upper member, 8b is a lower member, and 9 is a fixing means.

The joining jig 5 according to the present invention corresponds to the hanging jig 14 in the prior art described in FIG. 3, and the joining jig will be described in detail below.

A male screw is used for the upper member 8a, and a lower member 8b is used.
A female screw is provided on each of the members, and both members are preliminarily screwed and joined (the screwing direction is configured in the clockwise direction) as shown in the figure to form the joining jig 5. The wire 6 is attached to the upper member 8 a in order to suspend the entire joining jig 5, and is suspended by the suspension hook 13 attached to the tip of the wire 12. The wire 7 is attached to the lower member 8b for suspending the upper pile 2, and the upper pile 2 is suspended by passing the two wires 7 through the suspending metal fitting 3 attached to the upper pile 2.

The upper pile 2 is hung at a predetermined height (the height at which the male screw at the tip of the upper pile 2 is inserted into the female screw of the lower pile 1 and stopped) and directly above the lower pile 1 (on a straight line). Then, the fixing means 9 slides in the lateral direction to fix the upper member 8a.

Thereafter, when the upper pile 2 is rotated by human power or the like, the lower member 8b and the wire 7 are rotated together with the upper pile 2. However, above the upper member 8a, the fixing means 9 restrains the upper member 8a, so that the upper member 8a does not turn. At this time, since the lower pile 1 is a female screw and the upper pile 2 is a male screw and the screwing direction is configured in the clockwise direction, when the upper pile 2 descends due to screw joining, the upper member 8a and the lower member 8b are separated from each other. The space is enlarged while being screwed together.

As a result, since the lower end and the upper end of the upper pile 2 are screwed and supported, the upper pile 2 is suspended by a crane or the like, but the lateral run-out of the upper pile during the joining work is greatly reduced. As a result, smooth work can be performed and the safety of the joining operator is ensured.

Further, if the screw pitch provided on the pile and the screw pitch provided on the joining jig 5 are the same, as described above, the descending speed of the upper pile 2 and the descending speed of the lower member 8b coincide with each other. The operation of lowering the upper pile 2 by the operator of the crane or the like during the joining work and the signal (the signal of the lowering timing and the lowering distance) between the operator and the operator of the crane or the like are unnecessary.

If an electric motor for turning is provided in the joining jig 5 in order to turn the upper pile 2, the welding operator can
It is possible to drive remotely without approaching.

Before the joining is completed, the upper member 8a and the lower member 8
The length in which both members are screwed together in advance is designed to be longer than the screwing distance (corresponding to the thread cutting length) of the pile so that b and b do not come out.

As a suspension member other than the wires 6 and 7,
It suffices if the strength for suspending the upper pile 2 is secured, and chains, ropes, etc. can also be used.

As a combination in which the upper pile 2 is swiveled and joined to increase the distance between the upper member 8a and the lower member 8b, the upper member is a female screw, contrary to the above combination.
When the lower member is a male screw, one of the pile and the member may be a reverse screw (a direction opposite to the clockwise direction).

The procedure for screw-joining a steel pipe pile with a threaded joint using the joining jig 5 shown in FIG. 1 will be described below with reference to FIG.

After the lower pile 1 was buried in the ground so that the upper part thereof protruded from the ground by about 1 meter, a hanging hook 13 was provided at the tip of the wire 12, the joining jig 5 was hung, and the upper pile 2 was hung. While suspending the upper pile 2, transport it directly above the lower pile 1,
After performing the centering work, a joining worker (not shown) informs the crane driver to lower the upper pile 2 and
Insert the tip (male screw portion) of the above until it contacts the tip (female screw portion) of the lower pile 1. After that, the fixing means (not shown) slides in the lateral direction to fix the upper member 8a.

After this, the joining operator winds the chain tongs (not shown) around the outer periphery of the upper pile 2 and, while manually rotating the chain tongs in the direction of the arrow, screw-joins them and rotates them manually. The joining work is terminated when it is determined that the joining is completed.

As a result, the joining work does not require any contact between the joining worker and the crane operator, and during screwing,
Since the descending speed of the upper pile 2 and the descending speed of the lower member 8b match, the screw thread of the upper pile 2 is not pulled, the screw thread is not excessively applied, and the screw is smoothly and smoothly screwed with a slight force. Is possible. Further, the work time required for this is about 10 minutes, which is shortened by 20 minutes as compared with the conventional construction method using the lifting tool of FIG.

[0033]

Since the joining jig of the present invention is constructed as described above, the upper pile is screwed and supported from the vertical direction during screw-joining, and the lateral shake is greatly reduced. For this reason, stable and quick joining work and the safety of the joining worker are secured.

Also, if the screw pitch in the pile and the joining jig are the same, there is no need for signaling or communication between workers, the lowering speeds are the same, and the upper pile 2 is not pulled in the vertical direction. Thus, it is possible to provide a jig for joining a threaded joint pile that enables smooth screwing and is not affected by human factors such as the skill level of workers and communication between workers.

Further, since the screw structure in the joining jig is a parallel screw, the screw can be prevented from coming out, so that the safety is further improved.

[Brief description of drawings]

FIG. 1 is a diagram showing an embodiment of a joining jig for a screw joint pile according to the present invention.

FIG. 2 is a diagram showing a situation in which a threaded joint steel pipe pile is screwed and joined using the joining jig of FIG.

FIG. 3 is a diagram showing a conventional construction method.

[Explanation of symbols]

 1 Lower Pile 2 Upper Pile 3 Hanging Bracket 5 Joining Jig 6 Wire 7 Wire 8a Upper Member 8b Lower Member 9 Fixing Means 10 Crane Truck 11 Jib

Claims (3)

[Claims] 1. A screw joint pile for use in suspending an upper pile and screwing a screw provided on the lower pile to a screw provided on the lower pile to screw and join the lower pile and the upper pile. The jig is an upper member provided with a screw, a screw that is screwed to the screw of the upper member is provided, and the lower member is preliminarily screwed and joined to the upper member, and an upper member for suspending the joining jig. The suspension member provided on the member and the suspension member provided on the lower member for suspending the upper pile are provided, and when the upper pile is rotated, the lower member also rotates and the lower pile and the upper pile are separated from each other. A joining jig for a screw joint pile, characterized in that the joining is performed by screwing, and the screws provided on the upper member and the lower member are screwed together to widen the interval. 2. A screw pitch provided on the lower pile and the upper pile,
The joining jig for a screw joint pile according to claim 1, wherein the upper member and the lower member have the same screw pitch. 3. The joining jig for a threaded joint pile according to claim 1, wherein the screws of the upper member and the lower member that form the joining jig are parallel screws.