JPH10315200A - Water jet hole excavator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To excavate a hole in a hole excavating object body without damaging a reinforcing member such as a reinforcement by arranging a means to advance/ retreat a water jet nozzle in the shaft direction and a means to adjust a hole excavating shaft directional angle. SOLUTION: A water jet W of extra-high pressure water is injected from a nozzle 1 so as to be opposed to a concrete wall type bridge pier 11, and a hole is also excavated while rotating a rotary shaft body 2. When the nozzle 1 collides with a reinforcement inside of the bridge pier 11 in the middle of excavating the hole, rotation and sending-out of the nozzle 1 are automatically stopped. Here, an escape quantity of oil from a relief valve increases by using a hydraulic motor as a motor 6a to advance/retreat the rotary shaft body 2, and rotation and an advance of the nozzle 1 are automatically stopped. At this time, the nozzle 1 is slightly pulled back, and a horizontal directional angle adjusting mechanism 7 and a vertical directional angle adjusting mechanism are used, and when the hole excavating direction is corrected, the hole can be continuously excavated by avoiding the reinforcement.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water jet drilling apparatus for drilling a drilled body such as a concrete pier using a water jet.

[0002]

2. Description of the Related Art In recent years, concrete piers and the like have been reinforced as a measure against earthquakes. As this reinforcing method, a method of providing a large number of holes in a pier and reinforcing the holes with a reinforcing bar has been adopted in many cases. As a method of drilling a large number of holes in this pier, a method of drilling using a core drill has been conventionally adopted in many cases.

[0003]

As described above, the method of drilling a concrete pier using a core drill as described above may cut even the reinforcing steel inside the pier, which may impair the soundness of the pier. Was. Therefore, there is a demand for a drilling device that can drill a hole without damaging a reinforcing bar or the like inside a hole to be drilled such as a pier.

The present invention has been made in view of the above points, and has been made in view of the above circumstances. A water jet capable of drilling holes in a drilled body without damaging reinforcing members such as reinforcing bars inside the drilled body using a water jet. An object of the present invention is to provide a jet drilling device.

[0005]

Means for Solving the Problems To solve the above problems, the invention according to claim 1 is provided with a nozzle, and jets a high-pressure water jet from the nozzle to apply the water jet to a drilling surface of a drilling body. What is claimed is: 1. A water jet drilling device for drilling by a water jet, comprising: a forward / retreat means for advancing / retreating a nozzle along a drilling axis direction; and a drilling device for adjusting an angle in a drilling axis direction with respect to a drilling surface. A hole axis direction angle adjusting means is provided.

According to a second aspect of the present invention, there is provided a water jet drilling apparatus according to the first aspect, wherein the advancing / retreating means has a nozzle mounted at a tip and a flow path of ultra-high pressure water formed therein. It is characterized in that it comprises a shaft and is configured to be able to advance / retreat the rotating shaft.

According to a third aspect of the present invention, in the water jet drilling apparatus according to the second aspect, the rotary shaft body can be extended by extending.

According to a fourth aspect of the present invention, in the water jet drilling apparatus according to the second or third aspect, when the nozzle advances, the advance / retreat means is optimal according to the material of the drilling body. The drilling speed can be adjusted to a suitable drilling speed, and a forward / backward speed control means for retreating at a high speed when retreating is provided.

According to a fifth aspect of the present invention, in the water jet drilling apparatus according to any one of the first to fourth aspects, the nozzle is moved in two directions orthogonal to a drilling surface of the drilled body. And an orthogonal direction moving means is provided.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 are views showing an example of a basic configuration of a water jet drilling device according to the present invention,
1 is a plan view and FIG. 2 is a side view.

1 is an ultra high pressure (for example, about 2500 kg / cm
² ) A nozzle for jetting a jet of water, and the nozzle 1 is mounted on the tip of a rotary shaft 2 in which a flow path through which ultra-high pressure water flows is formed. One end of an ultra-high pressure hose 4 is connected to the rear end of the rotary shaft 2 via a swivel joint 3. An ultra-high pressure pump (not shown) is connected to the other end of the ultra-high pressure hose 4.

The rotary shaft 2 is rotatably supported by the slide base 5 via bearings 5a and 5b, and is rotatably driven by a motor 5c through power transmission means such as sprockets 5d and 5e. Has become. The slide base 5 is configured to move on the axial rail 6 together with the rotary shaft 2 and is driven by a motor 6a.

The axial rail 6 is connected to a horizontal rail 8 via a horizontal angle adjusting mechanism 7 for adjusting a horizontal angle.
The rotating shaft body 2 is mounted on the upper side, and the horizontal movement and the horizontal angle adjustment of the rotating shaft body 2 are enabled by the horizontal movement and the horizontal angle adjustment of the axial rail 6. Further, the horizontal rail 8 is installed on the vertical rail 10 via a vertical angle adjusting mechanism 9 for adjusting the angle in the vertical direction so as to be able to move up and down. Vertical movement and angle adjustment are possible by lifting and lowering and angle adjustment.

Next, the operation of the water jet drilling device having the above-described basic configuration will be described. As shown in FIGS. 1 and 2, the nozzle 1 is opposed to a concrete wall type pier 11, sprays a water jet W from the nozzle 1 with ultra-high pressure water, and cuts while rotating the rotary shaft 2. Make a hole. At this time, when the concrete pier 11 is advanced at a speed corresponding to the concrete strength of the concrete pier 11, a hole having a diameter through which the nozzle 1 can pass is drilled in the concrete pier 11, and the nozzle 1 is inserted. By feeding in, holes are continuously drilled toward the back.

If the nozzle 1 hits a reinforcing bar inside the concrete wall type pier 11 during the drilling, the rotation and the feeding of the nozzle 1 are automatically stopped. Here, the motor 5c for rotating the nozzle 1 and the rotary shaft 2 and the nozzle 1
By using a hydraulic motor as the motor 6a for moving the rotary shaft 2 forward / backward, the amount of oil that escapes from the relief valve increases, and the rotation and forward movement of the nozzle 1 are automatically stopped.

At this time, the nozzle 1 is pulled back a little, and the drilling direction is corrected by using the horizontal angle adjusting mechanism 7 and the vertical angle adjusting mechanism 9, so that the hole can be continuously drilled while avoiding the rebar. . This is Water Jet W
Is possible because the nozzle 1 is not in contact with the hole to be drilled. In the case of drilling with a core drill, the hole is drilled by contacting the drill with the hole to be drilled. Correction is difficult and the rebar may be cut.

When the drilling of one hole is completed, the nozzle 1 is pulled back at a high speed, moved on the horizontal rail 8 or the vertical rail 10, and set to the next drilling position. In addition, when the width L of the concrete wall type pier 11 is large, a long distance can be drilled from the installation space of a narrow device by adding the rotating shaft 2 in the middle of the drilling.

In the above embodiment, a concrete pier is described as an example of a hole to be machined. However, the hole to be machined is not limited to this and can be drilled using a water jet. In the case of a drilled body, the water jet drilling device can drill a reinforcing member such as a reinforcing bar inside without damage.

When the nozzle 1 is advanced by the motor 6a, the nozzle 1 is advanced at an optimal drilling speed according to the physical properties (hardness, brittleness, etc.) of the drilled body, and when the nozzle 1 is retracted, it is retracted at a high speed. Furthermore, by configuring the control device for the motor 6a, it is possible to perform an optimal drilling operation according to the physical properties of the drilled body.

Although not shown, setting of a drilling position for a drilling body such as a bridge pier, positioning of the nozzle 1 at the drilling position, forward / retreat speed of the nozzle 1, horizontal and vertical positions of the nozzle 1 By automatically setting the angle of the direction and the like, it becomes possible to automate all the drilling operations on the drilled body.

[0021]

As described above, according to the present invention, the water jet drilling device includes a forward / retreat means for advancing / retreating the nozzle along the drilling axis direction, and a drilling shaft with respect to the drilling surface. Since the drilling axis direction angle adjusting means for adjusting the angle of the direction is provided, without damaging reinforcing members such as reinforcing bars inside the drilling body such as a concrete wall type pier,
An excellent effect that a hole can be drilled is obtained.
Also, automation of the drilling operation can be easily realized.

[Brief description of the drawings]

FIG. 1 is a plan view showing an example of a basic configuration of a water jet drilling device according to the present invention.

FIG. 2 is a side view showing an example of a basic configuration of a water jet drilling device according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Nozzle 2 Rotating shaft body 3 Swivel joint 4 Ultra high pressure hose 5 Slide base 6 Axial rail 7 Horizontal angle adjusting mechanism 8 Horizontal rail 9 Vertical angle adjusting mechanism 10 Vertical rail 11 Concrete wall pier

Claims (5)

[Claims] 1. A water jet drilling device comprising a nozzle, which jets a high-pressure water jet from the nozzle and drills a hole on a drilling surface of a drilled body with the water jet. Water jet cutting, comprising: advancing / retracting means for advancing / retreating along a hole axis direction; and a drilling axis direction angle adjusting means for adjusting an angle of the drilling axis direction with respect to the drilling surface. Hole device. 2. The advancing / retracting means includes a rotary shaft body having the nozzle mounted at a tip thereof and a flow path of ultra-high pressure water therein, and configured to be able to advance / retreat the rotary shaft body. The water jet drilling device according to claim 1, wherein: 3. The water jet drilling device according to claim 2, wherein the rotating shaft body is configured to be extendable by adding to each other. 4. The advancing / retracting means is capable of adjusting the drilling speed to an optimum drilling speed according to the material of the drilling body when the nozzle advances, and retreating at a high speed when retreating. 4. The apparatus according to claim 2, further comprising control means.
A water jet drilling device according to item 1. 5. The water according to claim 1, further comprising orthogonal moving means for moving the nozzle in two directions orthogonal to a drilling surface of the drilling body. Jet drilling equipment.