JP2002370110A - Holding device for pipe boring machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To safely bore a steel pipe without placing a burden on a worker. SOLUTION: This boring machine holding device for holding a boring machine mounted on an outer peripheral face of the steel pipe, orthogonally to the steel pipe to bore the steel pipe, is provided with a stand part 23A abutted on an outer peripheral face of the steel pipe 1 at its basic part 21 and fixed to the steel pipe 1, a boring machine holding part 24 mounted on the stand part 23A and holding the boring machine 2 movably in the normal direction of the steel pipe, and a pressing means 27 for pressing the boring machine holding part 24 holding the boring machine 2, to the steel pipe 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drilling machine holding apparatus for holding a drilling machine for making a hole in a steel pipe such as a gas pipe.

[0002]

2. Description of the Related Art At a site, when a predetermined hole is formed in a steel pipe 45 such as a gas pipe, as shown in FIG. 3, a rod-shaped drilling tool 41 and a rear end of the drilling tool 41 are held. A drilling machine 40 including a main body 42 having a built-in drive motor for driving the drilling blade 41 to rotate is used. The drilling machine 40 is disposed so as to be orthogonal to the steel pipe 45,
It is used such that the operator presses the drilling machine 40 toward the steel pipe 45 while holding the handles 43, 43 extending left and right from the main body 42.

[0003] For example, in a gas pipe replacement work,
It is necessary to temporarily shut off the gas flow in the existing pipe before the reconnection work. At this time, a drilling operation for drilling a hole in the existing pipe is required as preparation before shutting off. The drilling machine,
Used to do this work.

In such a drilling operation, in order to press the drilling machine toward the side of the existing pipe, an operator holds the drilling machine on an existing pipe or on a ladder or the like installed near the existing pipe. I was

[0005]

However, when a worker works on an existing pipe or ladder, there is a case where the worker is forced to perform the drilling work in an unreasonable posture depending on the work site. Therefore, there is a danger that the worker may fall from the existing pipe or ladder. Nominal diameter is 10
When performing this operation on a steel pipe having a relatively small diameter of 0A to 200A, it is difficult to achieve a balance and it is particularly unstable.

[0006] Further, since the drilling operation is performed by the operator pushing down the drilling machine manually, the vibration of the drive motor built in the drive unit is transmitted to the operator. This vibration may cause pain such as joints to the operator.

The present invention has been made in view of the above problems, and provides a drilling machine holding device capable of drilling a steel pipe safely and without imposing a burden on an operator.

[0008]

According to the present invention, there is provided a drilling machine holding apparatus for holding a drilling machine arranged on an outer peripheral surface of a steel pipe so as to be orthogonal to the steel pipe for drilling the steel pipe. A stand part whose base is in contact with the outer peripheral surface of the steel pipe and fixed to the steel pipe, a drilling machine holding part attached to the stand part and holding the drilling machine movably in a normal direction of the steel pipe; The above object is achieved by a holding device for a drilling machine having a pressing means for pressing the drilling machine holding portion holding the drilling machine against the steel pipe.

According to the present invention, since the holding device of the drilling machine holds the drilling machine on the steel pipe to be drilled, it is not necessary for an operator to climb on the steel pipe and press down the drilling machine. In addition, by providing a mechanism for pressing the drilling machine on the steel pipe while holding the drilling machine movably in the normal direction for drilling the steel pipe in the holding device of the drilling machine, it is possible for an operator to directly push down the drilling machine. There is no need to do it.

[0010] Thus, not only can the work be performed safely without dropping from the steel pipe, but also the drilling operation can be performed comfortably without being directly affected by the vibration of the driving motor of the drilling machine.

According to the present invention, in the holding device for a drilling machine, a stopper for preventing movement of the drilling machine holding portion may be provided on the stand portion so that a tip of a drilling tool provided in the drilling machine may penetrate the steel pipe. It is characterized in that it is attached to a portion corresponding to the position.

By employing such a configuration, the operator can easily adjust the operation amount of the pressing means until the hole penetrates the steel pipe. Thereby, the work can be performed without performing delicate adjustment of the force, and the drilling work can be performed without difficulty even for an inexperienced worker. Furthermore, when the hole penetrates, it is possible to prevent the drilling tool of the drilling machine from passing through the hole formed in the steel pipe as it is and to prevent the entire drilling machine from dropping.

On the other hand, according to the present invention, in the above-mentioned holding device for a drilling machine, the base portion is formed such that a contact surface that comes into contact with an outer peripheral surface of the steel pipe is engaged with an outer peripheral surface of the steel pipe. It is characterized in that fixing means is provided for winding the steel tube around the steel pipe and fixing the base to the steel pipe.

According to the present invention, the so-called "sitting" of the holding device for the steel pipe can be improved, and high stability can be obtained. Further, by adopting a member to be wound around the steel pipe, for example, a nylon sling or a chain as the fixing means, it is possible to flexibly correspond to the nominal diameter of the steel pipe.

[0015]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a holding device 20 for a drilling machine 2 according to the present invention.
(Hereinafter simply referred to as the holding device 20).
Shows a state in which it is installed on the outer peripheral surface of the laid steel pipe 1.

The drilling machine 2 and the holding device 20 are respectively mounted on the outer peripheral surface so as to be parallel to each other and extend upward from the steel pipe 1.

First, the punch 2 will be described. The drilling machine 2 has been conventionally used generally and includes a rod-shaped drilling drill 3 and a main body 4 for holding a rear end of the drilling drill 3. The main body 4 has a casing 4A forming an outer shell thereof, and a drive motor (not shown) for rotating and driving the drill 3 is built in the casing 4A.
The tip of the drive motor is connected to the rear end of the drill 3. Also, on the upper surface of the casing 4A, a boring machine 2 is provided.
The holding part 5 provided for carrying itself is formed so as to protrude upward. On the other hand, on both sides of the casing 4A, bar-shaped handles 6, 6 protruding toward the side of the main body 4 are provided. When the drills 2 are used alone, the handles 6 are provided for an operator to grip them and push down the drill 2 toward the steel pipe 1.

In the drilling machine 2, the tip of the drill 3 is held by a mounting holder 10 mounted on the outer peripheral surface of the steel pipe 1. The mounting holder 10 includes a plate-shaped contact plate 11 that curves along the outer peripheral surface of the steel pipe 1, and a cylindrical coupling 1 that projects upward at the center of the contact plate 11.
2 and a chain 13 wound around the steel pipe 1 to fix the mounting holder 10 to the outer peripheral surface of the steel pipe 1.

The contact plate 11 is curved so as to engage with the outer peripheral surface of the steel pipe 1 so that the drilling machine 2 is installed in a stable state. The contact plate 11 is selected to have an appropriate curvature in accordance with the nominal diameter of the steel pipe 1 to be installed.
The chain 13 is detachably connected to both ends of the contact plate 11, and is tightly wound around the outer periphery of the steel pipe 1 to fix the mounting holder 10 to the steel pipe 1. This chain 13
Is adjusted to an appropriate length according to the outer diameter of the steel pipe 1 to be drilled, and is connected to the contact plate 11. The lower end of the coupling 12 formed in a cylindrical shape and connected to the contact plate 11 is open. On the other hand, the upper end is formed with a through-hole 10a at the center thereof, into which the drill 3 is inserted.

The drill 3 is held by the coupling 12 so as to be rotatable with respect to the coupling 12 at the center thereof and to be able to reciprocate up and down. By the mounting holder 10, the drilling machine 2 guides the drilling drill 3 to a desired position on the outer peripheral surface of the steel pipe 1 without causing a positional shift, and drills the steel pipe.

Next, the holding device 20 for holding the drilling machine 2 on the outer peripheral surface of the steel pipe 1 will be described.

The holding device 20 is in close contact with the outer peripheral surface of the steel pipe 1 and has a base 21 for mounting the holding device 20 on the steel pipe 1, a stand 23 extending upward from the base 21,
A drilling machine holding unit 24 is attached to the stand unit 23 and holds the drilling machine 2 so as to be movable up and down.
Further, the stand 23 is provided with a pressing screw 27 for pressing the drilling machine 2 attached to the drilling machine holding unit 24 toward the outer peripheral surface of the steel pipe 1.

The base 21 is formed such that a steel plate is bent at the center thereof and engages with the outer peripheral surface of the steel pipe 1. Chains 2 as fixing means are provided at both ends of the base 21.
2 are connected. The chain 22 is wound around the outer peripheral surface of the steel pipe 1 so that the base 21 is firmly fixed to the steel pipe 1. The base 21 is used by bending the steel tube 1 at an appropriate angle in accordance with the nominal diameter of the steel pipe 1 to which the holding device 20 is attached.
The length is adjusted to an appropriate length according to the nominal diameter of the steel pipe 1.
It should be noted that the base is not limited to the one formed by bending as shown in this figure, but may be one formed by bending in an arc shape along the outer peripheral surface of the steel pipe.

The stand 23 extending upward from the base 21 has a column 23A having a rectangular cross section.
It has. The lower end of the stand 23 is welded to a substantially central portion of the base 21 so as to be integrated with the base 21. The column 23A used for the stand portion 23 is formed to be taller than the drilling machine 2 arranged on the side thereof, and the drilling machine holding unit slides up and down along the stand unit above the drilling machine. Sliding portion is provided.

The drilling machine holding portion 24 projects from the column 23A toward the grip 5 located at the upper end of the drilling machine 2.
It is provided slidably up and down along the column 23A.
The drilling machine holding unit 24 includes a rectangular slide unit 25 that covers the outer peripheral surface of the column 23 </ b> A, and a holding arm 26 extending from the side surface of the sliding unit 25 toward the gripping unit 5 of the drilling machine 2. It is configured. The holding arm 26
The gripper 5 of the drilling machine 2 is held.

A fixing bracket 28 is provided above the boring machine holder 24 and projects parallel to the boring machine holder 24 and projects toward the boring machine 2. The fixing bracket 28 is fixed near the upper end of the column 23A, and has a rectangular mounting holder 29 formed to cover the outer peripheral surface of the column 23A.
And a support bar 32 extending horizontally from the side surface of the mounting holder 29 toward the drilling machine 2.

The mounting holder 29 has a fastening portion 30 at an upper portion thereof for fixing the mounting holder 29 to the column 23A. The fastening portion 30 is provided so as to occupy a fixed width from the upper end of the mounting holder 29. On a surface facing the drilling machine 2, a notched portion where the member is discontinuous is provided at a central portion in the width direction of the column 23A. Is formed. In this notch portion, overhang portions 30a, 30a are formed, in which the interval is reduced and a screw 31 for fastening the mounting holder 29 to the column 23A is screwed.
The projecting portions 30a project in parallel from both end surfaces of the discontinuous portions toward the drilling machine 2, and insertion holes for inserting screws 31 are formed at the centers thereof. A screw 31 for fastening is inserted into this hole, and the mounting holder 29 is fixed to the column 23A by tightening the screw 31.

It is to be noted that the fixing bracket 28 is securely connected to the support 2.
In order to fix the support bar 3A, the upper end and the lower end of the mounting holder 29 on the surface opposed to the surface on which the support bar 32 is provided may be welded to the column 23A. However, the mounting holder 29
The mounting holder 29 may be formed with a through-hole penetrating the inside and outside thereof, and a threaded hole may be formed in the column 23A so as to correspond to the through-hole, and the mounting holder 29 may be screwed and fixed in position.

On the other hand, approximately at the center of the support bar 32,
The screw hole 32a is formed so as to penetrate the upper and lower sides, and the pressing screw 27 is screwed into the screw hole 32a. Further, the support bar 3 is attached to the base of the support bar 32.
A reinforcing rib 33 for preventing deformation of the mounting holder 2 is provided so as to be integral with the mounting holder 29. Press screw 27
Is composed of a screw portion 27a screwed into the screw hole 32a, and a knob 27b provided integrally with the screw portion 27a at the upper end of the screw portion 27a and rotating the pressing screw 27 by hand. . The pressing screw 27 is for pressing the drilling machine 2 toward the steel pipe 1 by tightening, and the tip of the screw portion 27 a is in contact with the upper surface of the holding arm 26 of the drilling machine holding portion 24.

Further, the pillar 23A is provided with
A stopper 35 for preventing the movement of the drilling machine holding unit 24 is attached below the drill 4. The stopper 35 is attached so as to cover the outer peripheral surface of the column 23A in the circumferential direction. On the surface facing the drilling machine 2, there is provided a interference margin formed such that the end surfaces of the stopper 35 are separated from each other by a predetermined distance. From both ends of the stopper 35, projecting portions 35a, 35a project so as to be parallel to the drilling machine 2. A through hole is formed substantially at the center of each of the overhang portions, and a fastening screw 36 is attached to the through hole. Stopper 3
5 is the column 2 by tightening the tightening screw 36.
The position is fixed at 3A. In addition, also about this stopper 35, the upper end and the lower end of the surface on the side opposite to the surface provided with the interference are welded to securely connect the stopper 35 to the column 23A.
It is good to fix the position. In addition, the stopper 3 of the support 23A
A screw hole is formed at a position where the position 5 is fixed, and a through hole is formed in the stopper 35 so as to correspond to the screw hole, and a stopper screw is inserted into these holes to fix the stopper 35 to the column 23A. It does not matter.

The position at which the stopper 35 is fixed is determined by the lower end of the mounting holder 29 of the drilling machine holder 24 when the drilling machine 2 pierces the steel pipe 1 and the tip of the drilling drill 3 reaches the inside of the steel pipe 1. Is a position where it contacts the upper end of the stopper 35. By attaching the stopper 35 at such a position, the drilling drill 3 further enters the through-hole drilled by itself, thereby preventing the drilling machine 2 from dropping.

According to the holding device 20 having the above configuration, as described below, the operator can pierce the steel pipe 1 without manually pushing down the piercing machine 2 on the steel pipe 1.

First, the mounting holder 29 holding the lower end of the drilling machine 2 is aligned with the portion where the hole is to be formed, and
The drill 2 is arranged on the steel pipe 1. Further, the holding device 20 is moved to a position where the drilling machine 2 can be held, and the holding device 20 is arranged on the steel pipe 1 so as to be parallel to the drilling machine 2.
The placed drilling machine 2 is mounted on the steel pipe 1 by winding the chain 22 of the mounting holder 29 around the outer peripheral surface of the steel pipe 1. Similarly, the holding device 20 is configured to wind the chain 22 provided on the base 21 around the outer peripheral surface of the steel pipe 1 so that the holding device 2
0 is attached to the steel pipe 1. Next, the drilling machine holding unit 24 included in the holding device 20 is moved in the up-down direction, and the holding unit 5 of the drilling machine 2 is held by the holding arm 26 of the drilling machine holding unit 24.

After the completion of the setup, the power of the drilling machine 2 is turned on, and the drilling drill 3 is driven to rotate. afterwards,
The press screw 27 is tightened, and the tip of the press screw 27 is
4 is pressed downward, and the drilling machine 2 is gradually pushed down. The operation of rotating the pressing screw 27 and pushing down the drilling machine 2 is performed until the mounting holder 29 of the drilling machine holder 24 comes into contact with the stopper 35. Since the stopper 35 is set in advance so as to correspond to the position where the drill 3 penetrates the steel pipe 1, a desired through-hole is drilled in the steel pipe 1 when the mounting holder 29 comes into contact with the stopper 35.

This operation may be performed for each part to be pierced.

[0037]

As described above, according to the present invention, a worker can safely perform a drilling operation without climbing a steel pipe. Further, since the operator can push down the drilling machine without directly touching the drilling machine, the vibration by the drive motor of the drilling machine is not directly transmitted to the operator, and the work can be performed comfortably.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a holding device of a drilling machine according to one embodiment of the present invention.

FIG. 2 is a side view of the upper part of the holding device of the drilling machine shown in FIG.

FIG. 3 is a view showing an operation state in which drilling into a steel pipe has been performed conventionally.

[Explanation of symbols]

 Reference Signs List 2 drilling machine 3 drilling drill 4 body 5 gripping part 10 mounting holder 20 holding device 21 base 22 chain 23 stand part 23A support 24 punching machine holding part 25 slide part 26 holding arm 28 fixing bracket 29 mounting holder 32 support bar 35 stopper

Claims (3)

[Claims] 1. A holding device for a drilling machine for holding a drilling machine arranged on an outer peripheral surface of a steel pipe so as to be orthogonal to the steel pipe for drilling the steel pipe. A stand that is abutted and fixed to the steel pipe; a drill holder that is attached to the stand and holds the drill so as to be movable in the normal direction of the steel pipe; and a drill that holds the drill. And a pressing means for pressing a machine holding part against the steel pipe. 2. A stopper for preventing movement of the drilling machine holding portion is attached to the stand portion at a portion corresponding to a position where a tip of a drilling cutter provided in the drilling machine has penetrated the steel pipe. The holding device for a drilling machine according to claim 1, wherein: 3. The steel pipe according to claim 1, wherein the base has a contact surface that is in contact with an outer peripheral surface of the steel pipe and is formed to engage with an outer peripheral surface of the steel pipe. 2. A holding device for a drilling machine according to claim 1, further comprising fixing means for fixing the drilling machine.