JPH0753369B2 - Rotary punching device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a rotary perforation apparatus suitable for perforating reinforced concrete, rock, and the like.

[Conventional technology]

Conventionally, in order to form a hole such as a blast hole in concrete or rock, it is configured to give a striking force and a rotating force to a rod having a bit at the tip, and the striking force of the rod is applied to concrete or rock. By crushing and crushing with the tip part of the bit and rotating the bit, the hole is punched in the hitting part with the tip part, and this work is repeated and the dust is discharged by blowing air etc. to form. It is being appreciated.

To drill metal such as iron, use a drill that has a cutting blade at the tip and a continuous spiral groove on the peripheral surface.
While rotating the drill, gradually move forward with the feed mechanism,
BACKGROUND ART Metal scraps cut by a cutting blade are discharged to the outside along a spiral groove.

[Problems to be Solved by the Invention]

However, according to the former method, even if it is possible to pierce concrete or rock, it is not possible to pierce a metal object such as iron, and when it is used for piercing reinforced concrete, the bit reaches the rebar portion. Sometimes it will be damaged by a blow. Furthermore, there is a problem that a loud impact sound is generated and the surrounding environment is damaged when used outdoors.

On the other hand, according to the latter method, it is possible to perforate a metal object by rotating a drill.However, when concrete or rock is perforated by this, in the case of concrete or rock, the ground dust is a metal cutting waste. Since it is not continuous like this, it cannot be discharged along the spiral groove, and when the drill stays at the tip of the groove and the drill is pulled out, it fills up between the drill and the hole wall, and the drill cannot be pulled out. Occurs.

Further, in order to pull out the drill, since the feeding mechanism is gradually pulled out while being rotated in the reverse direction, there is a problem that the pulling speed is slow and the drilling work such as the blast hole cannot be efficiently performed.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above problems and to provide a rotary perforation apparatus capable of efficiently perforating a reinforced concrete or rock with a blast hole or the like.

[Means for Solving the Problems]

In order to achieve the above object, the rotary punching device of the present invention,
The guide is fixed in the front-rear direction on a frame that can be attached to the elevation arm of the moving carriage, the screw rod is rotatably supported between the front and rear of this guide, and the moving base is arranged on the guide so that it can move back and forth. , A screw formed by the pair of semi-screw holes by pivotally attaching a pair of gripping pieces provided with semi-screw holes on opposing inner surfaces that are opened and closed by a cylinder to the moving base and closing the gripping pieces. The hole is removably screwed into the screw rod, and the screw rod is rotated by a feed motor installed on the frame to move the movable table, and the cylinder releases the gripping piece. In addition, a cord such as a chain wound around the winding means is connected to the rear end of the moving table to move the moving table backward by the operation of the winding means. Fixed to A hollow rod, which is integrally provided with a cutting bit at its tip and has a liquid supply hole communicating with the outer periphery of the cutting bit inside the boring head, is rotatably inserted and supported in the front-rear direction, and is attached to the movable table. An electric motor for rotating the hollow rod is arranged.

[Action]

When the electric motor for driving the rotation of the hollow rod is operated, the hollow rod provided with the cutting bit rotates at a desired constant speed,
When the electric motor for feeding the movable table is operated, the screw rod rotates and the movable table provided with a pair of gripping pieces screwed to the screw rod advances, and is freely rotatable on the boring head on the operating table. The supported hollow rods are fed in a fixed amount, and the bit is used to perforate the reinforced concrete, rock, etc. with a rotation and a feed rate according to the properties of the reinforced concrete, rock, etc.

During this boring operation, a fluid such as high-pressure air or pressurized water is ejected from the tip of the bit into the boring hole through the liquid supply hole formed by the hollow portion of the hollow rod, so that the starch powder drilled by the bit is used as the rod. The fluid is discharged to the outside through the gap between the holes.

When a hole having a predetermined depth is drilled in this way, the pair of gripping pieces are opened by the cylinder to release the screw engagement with the screw rod, and then the cord connected to the rear end of the moving table is wound up. By pulling with a means, the movable table is retracted while the guide is fixed in the direction at the time of drilling, and the drill rod is smoothly and quickly pulled out from the drill hole.

〔Example〕

An embodiment of the present invention will be described with reference to the drawings. (1) is a moving base disposed on a guide (2) so as to be slidable back and forth. A boring head (3) integrally fixed to an upper surface of the moving base has a hollow rod ( 4) The rear part is rotatably inserted and supported,
A cutting bit (5) having a diameter slightly larger than that of the rod (4) is integrally fixed to the tip of the hollow rod (4).
The hollow inside of the hollow rod (4) is formed with a fluid supply hole (6), and this fluid supply hole (6) is communicated with the outside from the cutting bit (5).

(7) is an electric motor for rotating the hollow rod installed on the boring head (3), and the toothed pulley is provided on the rotary shaft of the hollow rod and the rear end of the hollow rod (4) protruding from the rear end of the boring head (3). (24) (27) are fixed to each other, and the toothed belt (25) is endlessly hung between both pulleys (24) (27) so that the hollow rod (4) is rotated at a desired rotation speed. is there. The rotation transmission mechanism between the electric motor (7) and the hollow rod (4) may be an appropriate mechanism such as a mesh gear.

(8) is a flat rectangular frame to which the guide (2) is integrally fixed on both sides of the upper surface, and a fixing claw body (28) having a sharp tip at the front end surface thereof is projectingly provided. And mounting brackets (29) (30) on the bottom of the front and rear ends.
As shown in FIG. 7, the brackets (29) and (30) of the moving carriage (31) raise and lower the elevation arm (3).
It is detachably mounted and fixed on the upper surface of 2).

Reference numeral (9) is a screw rod rotatably supported between the front and rear of the frame (8), and is screwed through a screw hole (11) provided in the moving table (1) to move by the rotation of the screw rod (9). Table (1)
The screw rod (9) is made to advance and retract freely along with the screw rod (9), and the screw rod (9) is rotated by the feed motor (10) installed on the rear end of the frame (8) to make a desired movement. A pedestal feeding speed is obtained, and the moving rod feeding mechanism is constituted by the screw rod (9) and the feeding electric motor (10).

(12) (12) are a pair of left and right gripping pieces provided in the central space of the moving table (1), and half screw holes (11
a) (11a) are formed and these half screw holes (11a)
(11a) forms the screw hole (11).

These gripping pieces (12) (12) are pivoted (1) between their upper ends.
3) to be freely opened and closed, and to be opened and closed by the cylinders (14) and (14) attached to the moving table (1) to be detachably screwed to the screw rod (9).

(15) is a cord such as a chain whose one end is connected to the rear end surface of the movable table (1), and the other end side is wound around a winding means (not shown) provided at a proper position of the rear end of the frame (8). It is turned and constitutes a returning mechanism of the movable table (1).

(16) is an electric power meter of the rotary drive motor (7), (17) is a telemeter consisting of a strain gauge attached to the hollow rod (4) at a proper position, and (18) is a load cell attached to a part of the feeding mechanism. , The load of the motor is measured by the electric power meter (16) or tachometer (not shown) of the electric motor (7), and the stress caused by the cutting torque or the pressing force of the hollow rod (4) is measured by the telemeter (17) or the load cell (18). Is measured, and these values are processed by a calculator to control the electric motors (7) and (10) to a rotation speed suitable for optimal cutting of reinforced concrete, rock, and the like.

Reference numeral (19) is a reinforcing bar sensing means in which a battery (21) is interposed in an earth wire (20) which grounds a hollow rod (4) at a proper position.
When the reinforced concrete is being drilled by the cutting bit (5), the potential difference is changed when it comes into contact with the rebar to detect the rebar, and the rotation speed of the electric motors (7) and (10) can be controlled to be suitable for cutting the rebar. .

The reinforcing bar sensing means (19) may have a reinforcing bar proximity sensor embedded in the cutting bit (5).

The rotary perforation device configured as described above is fixed to the upper surface of the elevation arm (32) of the moving carriage (31) via the mounting brackets (29) (30) of the frame (8), and the elevation arm (32) is fixed. ) Is rotated to direct the rotary drilling device to the surface of rock or reinforced concrete to be drilled (hereinafter, the case of drilling in reinforced concrete will be described), and the claw body (28) protruding from the front end of the frame (8) Is pierced into the reinforced concrete (a) and the rotary perforation device is placed in a state of facing the reinforced concrete surface.

Then, when the electric motors (7) and (10) are driven, the hollow driving rod (4) is rotated at a constant rotational speed suitable for cutting the reinforced concrete (a) by the rotation driving electric motor (7) and the electric motor for feeding (10) is also rotated. The screw rod (9) is rotated by the screw rod (9), and the movable table (1) screwed to the screw rod (9) via the gripping pieces (12) (12) advances to move the cutting bit (5) to the reinforced concrete. The concrete portion of the reinforced concrete (a) is perforated by advancing at a constant speed suitable for the cutting of (a).

When fluid such as high-pressure air, pressure water, or pressure oil is supplied from the rear end of the hollow rod (4) to the fluid supply hole (6) during this perforation, the fluid enters the perforation from the tip of the cutting bit (5). It jets out and flows toward the hole opening side through the gap between the hollow rod (4) and the hole, and discharges the cutting dust from the hole.

The cutting force is measured by the excavating bit (5). The electric power meter (16) of the rotary drive electric motor (7) is used to determine the motor load by the tachometer and the cutting torque and thrust direction applied to the cutting edge of the cutting bit (5). The thrust force of the electric motors (7) and (10) is measured by a telemeter (17) and a load cell (18), and these values are processed by a calculator so that rotation and feed can be performed according to the object to be drilled. It controls a variable speed motor.

That is, the numerical value of the cutting condition of the cutting bit (5) is obtained in advance by perforating an object such as iron, concrete, reinforced concrete, and various rocks, and the measured value of the numerical value and the object actually being cut are calculated. It is controlled so that the optimum cutting state can be obtained by comparing with a tool.

Thus, when the concrete part is drilled and the cutting bit (5) comes into contact with the reinforcing bar along the way, an electric potential difference occurs and an electric current flows through the ground wire (20), and the electric current is detected to detect the electric motor (7) (10). ) The motor is changed to the number of revolutions suitable for cutting the reinforcing bar, and the cutting bit (5) is used to continuously drill,
When the rebar is cut and reaches the concrete part,
Drive control of the electric motors (7) and (10) suitable for cutting the concrete is performed.

When a hole having a desired depth is formed in the reinforced concrete (a), the hollow rod (4) is then extracted from the hole.

In this case, the moving base (1) may be retracted along the screw rod (9) by rotating the screw rod (9) in the reverse direction by driving the feed motor (10), but in order to move it back quickly. The gripping piece (12) by the cylinder (14) (14)
(12) is opened and a half screw hole (11) for the screw rod (9) is opened.
a) After unscrewing (11a), the cord (15) is pulled and the moving base (1) is slid back on the guide (2).

Then, the rotary punching device is moved to the next punching position, and punching is performed again in the same manner as described above.

〔The invention's effect〕

As described above, according to the rotary perforation apparatus of the present invention, the movable table is provided on the guide fixed on the frame so as to be movable back and forth, and the boring head fixed on the movable table is provided with the cutting bit at the tip. Since the hollow rod is rotatably inserted and supported, and the hollow rod is rotated by an electric motor to advance the moving table, the hollow rod is pierced in reinforced concrete or rock. The punching work can be performed in a good working environment without producing a large impact sound.

Further, while a screw bar is rotatably supported between the front and the rear of the guide, a pair of gripping pieces having semi-screw holes on the inner surfaces facing each other, which can be opened and closed by a cylinder, are pivotally mounted on the moving base. Is closed to screw the screw hole formed by a pair of half screw holes to the screw rod in a detachable manner, and the screw rod is rotated by the feed motor installed on the flare to move the movable table. Since it is configured so that the moving table can be fed reliably and accurately by the rotation speed of the screw rod, it is possible to rotate the hollow rod at a constant speed according to objects to be pierced such as reinforced concrete and rock, and to feed a fixed amount. As a result, uniform holes can be accurately and efficiently formed.

In addition, by ejecting fluid from the cutting bit through the fluid supply hole provided in the hollow rod during the perforation, it is possible to discharge the chipping dust generated as cutting waste together with the fluid to the outside of the hole, and thus the cutting operation is smooth. In addition, the cutting bit can be easily removed after drilling.

Further, as described above, the pair of gripping pieces provided on the moving base can be opened and closed by the cylinder, and the half screw holes provided on the facing surfaces of these gripping pieces are detachably screwed to the screw rod, Since the cord of the chain or the like wound around the winding means is connected to the rear end of the moving table and the moving table is retracted by the operation of the winding means, the cylinder is moved after the boring operation. After the pair of gripping pieces are opened by activating them to release the screw engagement with the screw holes, the winding means is activated to pull the movable table through the cord, so that the guide of the movable table can be used for drilling. The movable base can be quickly retracted in the direction of the extension of the hole drilled while being fixed in the same direction, so that the hollow rod can be pulled out quickly and reasonably, and a large number of blast holes, etc. The work of drilling individual holes can be performed efficiently.

[Brief description of drawings]

The drawings show an embodiment of the present invention. FIG. 1 is a simplified side view, FIG. 2 is a plan view, FIG. 3 is a partially longitudinal front view, FIG. 4 is a rear view, and FIG. 6 is a partially longitudinal front view showing a feeding state of the sheet, FIG. 6 is a partially longitudinal rear view showing a state of returning, and FIG. (1) ... moving table, (2) ... guide, (4) ... hollow rod, (5) ... cutting bit, (6) ... fluid supply hole, (7)
... Rotation drive electric motor, (8) ... Frame, (9) ... Screw rod, (10) ... Feeding electric motor, (11) ... Screw hole, (15) ...
Rope, (16) ... wattmeter, (17) ... telemeter, (18)
… A load cell.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yuji Idezaki 1-1-1 Edamitsu, Hachimanto-ku, Kitakyushu, Kitakyushu, Fukuoka Inside the Engineering Department, Nippon Steel Co., Ltd. (72) Inventor Yukio Ishizaka, Yawata, Kitakyushu, Fukuoka 2-19-1 Sanno, Higashi-ku, Okumura-gumi Kyushu Branch (72) Inventor Makoto Kamiyama 2-19-1, Yamano, Kitakyushu, Kitakyushu, Fukuoka Prefecture Okumura-gumi, Kyushu Branch (72) Inventor Chiharu Nishi, Kitakyushu, Fukuoka 2-19-1 Sanno, Yawatahigashi-ku, Okumuragumi Kyushu Branch, Inc. (72) Inventor Tatsuhiro Kocho, 2-19-1 Sanno, Yawatahigoku-ku, Kitakyushu, Fukuoka (56) References Special Kai 62-193715 (JP, A) JP 60-262608 (JP, A) JP 59-185616 (JP, A) JP 61-137705 (JP, A) JP 61-4615 ( JP, B 2)

Claims (1)

[Claims] 1. A guide is fixed in the front-rear direction on a frame that can be attached to the elevation arm of a movable carriage, a screw rod is rotatably supported between the front and rear of the guide, and the movable base is moved back and forth on the guide. The pair of half-screw holes are freely attached to the movable table, and a pair of gripping pieces provided with half-screw holes on opposite inner surfaces that are opened and closed by a cylinder are pivotally attached to each other and the gripping pieces are closed. The screw hole is formed to be detachably engaged with the screw rod, and the screw rod is rotated by a feed motor installed on the frame to move the moving table. The gripping piece is opened, and at the rear end of the movable table, a cord or the like wound around the winding means is connected to move the movable table backward by the operation of the winding means.
Furthermore, on the boring head fixed on this moving table,
A hollow rod integrally provided with a cutting bit at its tip and having a liquid supply hole communicating with the outer periphery of the cutting bit inside is rotatably inserted and supported in the front-rear direction, and at the same time, the hollow rod is attached to the moving base. A rotary punching device having a rotation driving electric motor.