JPH11350863A - Positioning method and device for casing tube press-fitting machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To accurately adjust the center of a hole of a base of a press-fitting machine to the center of a pile by mounting three bridge parts on a base while extending them from the center, moving the same to obtain the center of the hole of the base, and adjusting the tip of an indication rod in the perpendicular direction to the pile center. SOLUTION: A receiver for a ball 7 through which an indication rod 4 having a weight 6 mounted thereon passes is provided at the center where one end of each of three bridge parts 3 is disposed so that they extend radially therefrom. The other end of each of the parts 3 is placed on a base of a casing tube press-fitting machine, and moved. The distances of the three bridge parts 3 are made equal from the center in this way to obtain the center position of the hole provided in the base. The press-fitting machine is moved to adjust the tip of an indication rod 4 to which the weight 6 indicating the center of the hole of the base is mounted to the center of a pile on the ground. Accordingly, according to operation, the press-fitting machine can be set at a safe and accurate position.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and a device for positioning a casing tube press-fitting machine which is pressed into the ground when digging a hole using a casing tube. Here, the casing tube includes a steel pipe.

[0002]

2. Description of the Prior Art In order to build a building or a large building, a pile for supporting the building must first be provided underground. There are two methods of placing piles in the ground: a method of driving an existing pile at the site, and a method of casting a concrete hole into the site by digging a hole at the site, and the latter has an advantage of lower noise. Recently, cast-in-place piles are often used to build large buildings in the city center. There are various methods for digging holes, but there is a method of inserting a cylindrical casing tube into the ground and digging out the soil inside. This method is safe because the casing tube prevents the collapse of the wall surface even on soft ground. In order to insert the casing tube into the ground, not only can pressure be applied to the casing tube, but also a method in which the tip is made to have a saw-tooth shape and it is swung or rotated.

[0003] The place where a building or the like is to be built is accurately determined by a design drawing or the like, and the place of a stake for supporting the building must naturally be a predetermined position. In general, the center of the pile is laid with a bar or large nail as a marker on the ground according to the design drawing. A casing tube having a diameter of about 600 mm and a large one having a diameter of about 3 m is required. Inserting this casing tube into the ground has to be performed around the pile core.

[0004] Pressing into the ground is performed by tightening the outer periphery of the casing tube with a tightening member and then applying a force in the ground direction by a pressing machine. In order to press-fit the casing tube into the ground with the pile core as the center, the center of the hole provided in the base of the press-fitting machine must be aligned with the mark core provided on the ground surface.

[0005] Some casing tube press-in machines weigh several tens of tons because they are machines that press-fit them into the ground. The center of the hole provided in the base of the press-fitting machine,
In order to match the mark on the pile core on the ground surface, a press machine weighing tens of tons is suspended by a crane and moved.

[0006]

Conventionally, a water thread is stretched in a cross shape over the base portion of a press-fitting machine to determine the center position of a hole in the base portion, and a person holding a weight suspended by a thread is used by a person. He went inside, took the thread hanging the weight to the intersection of the water thread and the place, and adjusted the position of the press-in machine with a crane so that the tip of the plumb bob was aligned with the core of the pile. However, such adjustment is made when the water thread and the thread hanging the weight come in contact with each other.
The water thread sags and this intersection no longer indicates the center of the hole in the base. It is difficult to tell whether the water thread and the thread on which the weight is suspended come into contact.

[0007] There is also a method in which a cross is formed with a reinforcing bar of about 6 mm without using a water thread, and a thread with a weight suspended at the intersection is brought into contact with the tip of the weight and the pile core. However, in this method, since the reinforcing bar has a large thickness, it is impossible to bring a thread hanging a lower weight at the center of the hole of the base portion. Therefore, even if measured in this way, the casing tube cannot be press-fitted around the pile core. In addition, to save this rebar cross requires a surprisingly large space,
When carrying, it may be deformed by hitting another object, and it is impossible to accurately determine the center position of the hole of the base portion even with such a cross-shaped reinforcing bar.

A weight is hung at this intersection using a water thread or a reinforcing bar. If the tip does not match the core of the pile, the crane is operated by a hand signal of a person holding the weight in the hole of the base. The operator moves the press-fitting machine to a position where the tip of the weight and the pile core match. However, it is very difficult to move a press machine weighing tens of tons quietly. The suspended press-fitting machine sometimes shakes greatly by the operation of the crane operator. If the press machine shakes greatly, the person who had entered the hole in the base and had a weight would not be able to move in accordance with the shaking, and would be pushed by the press machine and fall, sometimes threatening life. It was a serious accident.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and it is possible to avoid a danger of moving the press-fitting machine while a person is inside, and to prevent the center of a hole in a base portion of the press-fitting machine. It is an object of the present invention to provide a positioning method and a positioning device for a press-fitting machine for a casing tube, which can precisely adjust the position of the casing tube to a pile core.

[0010]

In order to achieve the above object, at the center of at least three bridges provided radially, there is provided a ball receiver through which a pointing rod to which a weight is attached passes. Each of the other ends of the at least three bridges is mounted on the base of the casing tube press-fitting machine and moved to make the distances of the at least three bridges equal from the center. Determine the center position of the hole, move the press-fitting machine of the casing tube, and align the tip of the indicator rod to which the weight indicating the center position of the hole provided in the base is attached with the pile core on the ground. In order to achieve the above method, at least three bridges graduated to determine the center position of a hole provided in the base of the press-fitting machine are provided at the center provided radially. A ball receiver through which a pointing rod having a weight attached is provided is provided, and the positioning rod is used as a positioning device for a press-fitting machine for a casing tube which aligns the tip of the pointing rod with a pile core, and at least three bridges are radial. At the center provided in the is provided a hole through which the indicator rod penetrates vertically, and the other end of each of the at least three bridges is placed on the base of the press-fitting machine of the casing tube, and is moved. The center positions of the holes provided in the base portion are determined by making the distances of at least three bridges equal from the center, and the press-fitting machine for the casing tube is moved to move the center position of the holes provided in the base portion. In order to achieve the above method, an eye for determining the center position of the hole provided in the base of the press-fitting machine is to be aligned with the tip of the indicator rod indicating the above. At the center where at least three bridges are provided radially, there is provided a hole through which a vertically extending indicator rod penetrates, and a casing tube for aligning the tip of the indicator rod with a pile core Of the press-fitting machine.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings. FIG. 1 shows a top view of a pile core setting machine 1 according to one embodiment of the present invention. Base 2 in the center of the drawing
Has three bridges 3 extending radially. The bridge 3A is attached to the end of the bridge 3, and the bridge 3A is inserted into the bridge 3 when not used. FIG. 1 shows this pile core setting machine in use. When not in use, the bridges 3 can be arranged so as to be in contact with each other like a tripod of a camera. Configuration.

FIG. 2 is a side view of the pointing rod 4, the weight 6, and the receiver 10 supporting the same, which are attached to the base 2 of the pile core setting machine 1 shown in FIG. The indicator rod 4 having the weight 6 attached to the lower part penetrates the center of the ball 7 and the penetrating hole 20 is formed thicker than the indicator rod 4, so that the indicator rod 4 freely moves up and down the hole 20. be able to. The ball 7 through which the pointing rod 4 passes is supported by the receiver 10. The receiver 10 gently presses the intermediate portion of the ball 7 with a spherical surface as shown in FIG. Without the indicator rod 4, the ball 7 can freely rotate in the receiver 10. In practice, the ball 7 cannot rotate freely due to the presence of the indicator rod 4, but the indicator rod 4 moves in the front, back, left and right directions of the drawing, and the tip of the indicator rod 4 moves in a circle. Is possible. Because of this freedom, even when the installation location of the pile core setting machine 1 shown in FIG. 1 is inclined, the indicator rod 4 always indicates the vertical direction. A stopper 8 is provided on the upper side of the pointing rod 4 shown in FIG. 2, and the length below the receiving rod 10 of the pointing rod 4 can be adjusted by tightening the thumb screw 9.

FIG. 3 shows a pile core setting machine 1 shown in FIG.
Fig. 7 shows the time when the position of the casing tube press-fitting machine is determined. FIG. 3 shows only the base portion 11 of the casing tube press-fitting machine for easy understanding. In order to determine the position of the casing tube press-fitting machine, first, the center position of the hole 12 provided in the base portion 11 must be determined. To this end, three bridges of the pile core setting machine 1 shown in FIG. 1 are bridged over the edge of the hole 12 as shown in FIG. To be put on. Thereafter, the pile core setting machine 1 is moved by hand so that the length from the center of the pile core setting machine 1 to the edge of the hole 12 is equalized. This can be done easily by marking each bridge 3 with a scale. When the lengths of the three bridges 3 are equal, the center of the pointing rod 4 provided at the center of the pile core setting machine 1 indicates the center position of the hole 12. Then, the thumb screw 9 of the stopper 8 attached to the indicator rod 4 is loosened and extended to a position where the tip of the indicator rod 4 comes very close to the ground surface, and the thumb screw 9 is tightened and fixed here. The tip of the pointing rod 4 indicates a position where the center position of the hole 12 of the base portion 11 is lowered in the vertical direction. The weight 6 attached to the pointing rod 4 is for ensuring that the pointing rod 4 is vertically oriented.

The above operation is performed when the diameter of the casing tube is not known. When this diameter is known, the scale is set to the radius of the bridge 3 and the center of the hole 12 of the base portion 11 is immediately set. The machine 1 can be set.

If the tip of the indicator rod 4 coincides with the mark 15 of the pile core placed on the ground by the above operation, the operation of the casing tube press-fitting machine can be started in this state. However, it is extremely rare that the mark 15 of the pile core matches at first.
Usually do not match. When the tip of the indicator rod 4 does not match the mark 15 of the pile core, the entire casing tube press-fitting machine including the base portion 11 must be moved. Conventionally, since a person has a thread on which a weight is hung, a person enters the hole 12 of the base portion 11 when moving, and instructs the crane operator in which direction to move. However, in this pile core setting machine 1, a person
It is not necessary to enter the hole 12, and the tip of the indicator rod 4 can be observed from outside and a signal can be sent to the crane operator. For this reason, even if the press-fitting machine for the casing tube is largely shaken due to an operation error of the crane, it can easily escape, and it is possible to prevent the occurrence of a life-threatening accident.

In the above embodiment, the case where the hole 12 of the base portion 11 is circular has been described, but the hole 12 may be a triangle or a square instead of a circle. In addition, although three bridges 3 radially provided in this pile core setting machine are shown, the same effect can be obtained with more bridges.

If the tip of the pointing rod 4 is brought very close to the ground, even if no person enters the hole 12 of the base 11,
Almost no errors occur due to external observation.
If the tip of the indicator rod 4 is aligned with the mark 15 of the pile core, it means that the casing tube press-fitting machine has been set here.
The operation of this machine can be started.

FIG. 4 shows that the casing tube 16 is
Reference numeral 3 indicates the time of press-fitting into the ground. This press-fitting machine has a fastening portion 18 on the base portion 11, and four columns 19 are provided between the base portion 11 and the fastening portion 18. After the position of the press-fitting machine 23 of the casing tube 16 is determined, the casing tube 16 is set through the hole 17 of the fastening portion 18 and the hole 12 of the base portion 11. Thereafter, the casing tube 16 is fixed to the fastening portion 18 by a chuck or the like. Thereby, the casing tube 16 is integrated with the press-fitting machine. Prop 19
Is adapted to expand and contract by hydraulic pressure, and after the casing tube 16 is fixed to the tightening portion 18, the column 1
9 is operated so as to contract by hydraulic pressure. When the support column 19 contracts, a force is applied to the casing tube 16 in the underground direction,
Dive slowly. In the case where it is difficult to dive only by press-fitting, a method of swinging or rotating the casing tube may be adopted as described in the section of the related art. After the support column 19 has contracted most, the chuck of the fastening portion 18 is loosened, and the support column 19 is hydraulically extended. By repeating this, the casing tube 16 is pressed into the ground.

FIG. 5 shows a support means for the pointing rod 4 different from that of FIG. The substrate 2 is provided with a hole 25 through which the indicator rod 4 passes. The hole 25 is formed in a direction perpendicular to the three bridges 3. Even if the indicator rod 4 is supported in this way, the pile core setting machine can be mounted on the hole 1 of the base 11 by the method shown in FIG.
2 and the length of each of the three bridges 3 is made equal, the tip of the indicator rod 4 indicates the center position of the hole 12 of the base portion 11, which is similar to the pile core setting machine shown in FIG. The effect can be obtained.

[0020]

According to the present invention, the press-fitting machine for the casing tube can be set at a safe and accurate position by operating as described in the above embodiment.

[Brief description of the drawings]

FIG. 1 shows an upper surface of a pile core setting machine.

FIG. 2 shows support means for an indicator rod of a pile core setting machine.

FIG. 3 shows a pile core setting machine mounted on a base.

FIG. 4 illustrates a case where a casing tube is press-fitted by a press-fitting machine.

FIG. 5 shows the support means for the indicator rod of a different pile core setting machine.

[Explanation of symbols]

1. Pile core setting machine 2. Base 3, 3A Bridge 4. Indicator rod 6. Weight 7. Ball 8. Stopper 9.
Thumbscrews 10 ・ Receiver 11 ・ ・ Base 12 ・ ・ Hole 15 ・ ・ Mark of pile core

Claims (4)

[Claims] At least three bridges are provided radially at a center thereof, and a ball receiver through which a pointing rod to which a weight or the like is attached penetrates is provided, and the other end of the at least three bridges is provided. Are placed on the base of the casing tube press-fitting machine, and by moving the at least three bridges, the lengths of the at least three bridges are measured to determine the center positions of the holes provided in the base. A method for positioning a press-fitting machine for a casing tube, comprising: moving the tip of an indicator rod, to which the weight indicating the center position of a hole provided in the base portion is attached, to a pile core on the ground. 2. An indication that a weight is attached to the center where at least three bridges graduated to determine a center position of a hole provided in a base portion of a press-fitting machine are radially provided. A positioning device for a casing tube press-fitting machine, comprising a ball receiver through which a rod penetrates, and aligning a tip of the indicator rod with a pile core. 3. A hole is provided at the center where at least three bridges are radially provided, through which a pointing rod penetrates vertically, and each of the other ends of the at least three bridges is press-fitted into a casing tube. The center position of the hole provided in the base part is determined by measuring the length of the at least three bridges by placing the base on the base part of the machine, and moving the casing tube press-fitting machine to the base part. A method of positioning a casing tube press-fitting machine, wherein a tip of the indicator rod indicating a center position of a hole provided is aligned with a pile core on the ground. 4. At least three bridges, which are graduated to determine the center position of a hole provided in the base of the press-fitting machine, are provided vertically at the radial center. A positioning device for a casing tube press-fitting machine, characterized in that a hole through which the indicator rod penetrates is provided, and a tip of the indicator rod is aligned with a pile core.