JP2001254390A - Method of cutting bedrock and groove cutter used for the method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method of cutting bedrock which enables efficient cutting of the bedrock included in a running plane part of a cutter and thereby enables decrease of the abrasion of bits and rippers, and a groove cutter which is used suitably for the method. SOLUTION: While the automotive cutter 2 is made to run, cutting bits 10 provided on the cutter 2 are rotated around the lateral axis in the direction of the width of a machine body, so as to cut the running plane part R of the cutter 2. In this method, a plurality of grooves (a) for forming independent bedrock portions each having a free plane are formed beforehand in the bedrock included in the running plane part R, so as to reduce a cutting load given by the cutting bits 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rock cutting method and a grooving machine used in the method.

[0002]

2. Description of the Related Art For example, in the construction of roads and dam power plants, and in the excavation of mountain tunnels, for example, in order to remove hard rock, the rock was conventionally blown using blasting. If the noise and vibration are large, it will seriously affect the surrounding private houses, existing dams, power plants and other facilities, and if the rocks under the blast are loosened and the strength of the base is reduced, There was a problem in that it led to water leakage.

[0003] In addition, means for crushing the rock using a large breaker, or filling a hole formed in the rock with an expanding material,
In some cases, static crushing measures were taken to break the rocks.However, there was a problem in that all were low in capacity, large breakers were noisy, and static crushing means were expensive. Was.

Therefore, in recent years, as shown in FIG. 10, a self-propelled cutting machine 2 provided with a number of drums 11 having cutting bits rotatable about a horizontal axis in the machine body width direction is used to lower the bedrock. The method of cutting with low noise and low vibration has been adopted.

In this method, the drum 11 with cutting bits is rotated while the cutting bits 10 are pressed against the bedrock by the weight of the cutting machine 2 and the cutting machine 2 is run.
This is a construction method for cutting the bedrock of the running surface R of the self-propelled cutting machine 2. According to this construction method, a construction site such as a road or a dam power plant, or a lower half of a mountain tunnel in which an upper half is excavated. Then, the above-mentioned self-propelled cutting machine 2 is put in, and the cutting machine 2 is run while rotating the drum 11 with a bit, so that the running can be performed at a lower cost compared to a breaker or a means of static crushing. The rock of the surface portion R can be efficiently cut with low noise and low vibration.

[0006]

With the above-mentioned cutting means, it is inevitable that the tip of the bit is worn away with the cutting of the rock, but when the strength (hardness) of the rock is high, the tip of the bit is inevitably worn. There is a problem in that wear is extremely increased, and the bit pressed against the rock by the weight of the cutting machine 2 does not bite into the rock, and the cutting ability is reduced.

In the self-propelled cutting machine 2 described above, the bearings at both ends of the horizontal axis of the bit-equipped drum 11 protrude greatly to the right and left sides of the machine body. The amount of overhang is further increased, and it becomes difficult to cut off the rock at the end of the course. D is formed, and the slope becomes gentle. The same applies to the excavation of a mountain tunnel having a wall surface. The current situation is that a breaker is used to steepen the tunnel wall surface with noisy noise.

In addition, self-propelled cutting machines include power cutters, trenchers, ripper dozers, and impact ripper (these machines have a function of excavating and cutting rocks. In this regard, these machines and machines provided with the above-described drum with a cutting bit rotatably around the horizontal axis in the machine width direction are collectively referred to as self-propelled cutting machines.) Even when using a machine, if the strength of the rock is high, the wear of the ripper etc. will increase extremely or the cutting capacity will decrease,
In addition, it is difficult to cut rock at the time of the law, and in this case, too, a breaker that generates noise and has low efficiency is used to finish the slope with a predetermined slope.

The present invention has been made in view of such circumstances, and can efficiently cut rock rocks included in the running surface portion of the various self-propelled cutting machines described above. As a result, the method of reducing the wear of the bits and ripper of the self-propelled cutting machine and the method of cutting such as through
The walls of mountain tunnels are also called slopes. The present invention provides a construction method capable of reducing the overhang dimension of the step formed in the above step or forming a desired slope when necessary, and a groove cutting machine suitable for use in these construction methods. It is an object.

[0010]

In order to achieve the above object, the present invention relates to a method for cutting a running surface of a self-propelled cutting machine by using the various self-propelled cutting machines described above. The feature is that a plurality of grooves are formed in advance in the rock mass included in the traveling surface portion (claim 1).

That is, although the strength (hardness) of the rock depends on the strength of the rock itself, it also depends on the ratio of cracks and cracks (hereinafter, referred to as cracks). The cracks break the continuity of the rock. Since the free surface is formed and the rock is independent between the cracks to reduce the impact strength of the independent rock, it goes without saying that the more cracks, the easier the rock is to be crushed.

The present invention has been made in view of this point, and a plurality of grooves corresponding to shallow cracks are formed on the surface of a rock, and more specifically, the surface of a rock is divided. As described above, the independent rock part which has a free surface and is vulnerable to impact is formed by a groove along the running direction of the cutting machine, a groove orthogonal to the running direction, and a groove oblique to the running direction. It is characterized in that it is formed on the surface and this independent rock is cut, so that a self-propelled cutting machine equipped with a number of drums with cutting bits rotatable around the horizontal axis in the machine width direction While cutting the running surface portion (Claim 2), or the various self-propelled cutting machines described above (power cutter, trencher, ripper dozer,
Even if the running surface is cut while running the impact stripper, the rock can be cut efficiently with a light load and with a small impact force, thereby reducing the wear of bits and ripper. It is done.

[0013] Here, if a rock is present at the time of departure from the running surface of the self-propelled cutting machine, a groove different from the plurality of grooves previously formed on the running surface is also formed on the rock. Is preferable (claim 3).

That is, in a self-propelled cutting machine, a step portion having a large overhang dimension is formed on the slope surface. By cutting the running surface with multiple grooves in advance using a self-propelled cutting machine, it is possible to form a slope with a small overhang of the step so that the use of a breaker to eliminate the step is unnecessary. Therefore, even if a breaker is used, it will be small, and furthermore, by adjusting the depth and angle of the groove formed in advance, the slope including the vertical will be formed at the desired slope. Can be easily performed.

A grooving machine suitable for use in the above-mentioned cutting method comprises a guide frame provided with an elevating frame connected to a self-propelled traveling vehicle body, and a bit for groove cutting provided on the elevating frame. The drum is provided so as to protrude outward in the width direction of the vehicle body, and is provided with drum driving means for driving and rotating the drum around a horizontal axis in the width direction of the vehicle body. 4).

Preferably, a turntable is provided on the self-propelled traveling body so as to be able to turn around a vertical line, and a guide frame provided with an elevating frame is connected to the turning table. A drum provided with a groove cutting bit is provided so that the lifting frame is pivoted to one of the right and left sides of the traveling vehicle body so as to protrude outward in the width direction of the vehicle body. Drum driving means for driving and rotating about the horizontal axis of the direction (claim 5).

In any of the above groove cutters, a groove in the traveling direction of the vehicle body can be formed on one side of the vehicle body in a state where the groove depth can be adjusted as the vehicle body travels. Prior to the above-mentioned self-propelled cutting machine, a groove along the running direction of the cutting machine, a groove orthogonal to the running direction, and a groove oblique to the running direction are cut. Efficient cutting of the running surface by a self-propelled cutting machine by forming multiple strips on the rock included in the running surface of the machine and forming an independent rock part with a free surface that is vulnerable to impact on the surface of the rock Can be done.

Further, the groove is formed by adjusting the depth in advance at the time of cutting by using these groove cutting machines. By configuring so that the posture can be changed around and adjusting the angle of the groove, it is possible to form a slope having a desired slope including the vertical.

[0019]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a self-propelled cutting machine 2 provided with a cutting means 1 for cutting a running surface portion R. The cutting means 1 is arranged between front and rear running bodies 4 and 5 provided with a crawler type running device 3. At the same time, a traveling conveyor 5 for cuttings to the rear of the machine body, a dump truck 7
And the like.

The above-mentioned cutting means 1 is provided with a body frame 9 so as to be able to roll over the front and rear traveling bodies 4 and 5 so that a horizontal posture can be maintained, and as shown in FIG. A drum 11 having a number of replaceable cutting bits 10 helically mounted on a body frame 9.
Is mounted so as to be rotatable about the horizontal axis in the machine width direction, and the drum driving means 12 is connected to one end of the drum 11.
When the front and rear traveling bodies 4 and 5 are driven forward while rotating in the up-cut direction (clockwise direction in the figure) indicated by, the traveling surface R including the rock is cut by the bit 10.

The cut material is collected at the center by a cutting bit 10 provided in a spiral shape, is conveyed backward through a conveyor 6 and a loading conveyor 8, and is loaded on, for example, a dump truck 7 or the like. The self-propelled cutting machine 2 is reciprocated to sequentially cut the running surface portion R, for example, at the time of forming a cut-through road, thereby forming cut-through slopes on both sides of the road.

When the traveling surface R is cut by the self-propelled cutting machine 2 and the traveling surface R includes rock, or when the traveling surface R itself is rock, FIG.
As shown in (1), a plurality of grooves a are formed in advance on the rock surface so as to break the continuity of the rock on the running surface portion R, and further, grooves a1 are also formed on the rock at the time of the off-road surface portion R. The rock mass divided by these grooves a, a1 is cut by the self-propelled cutting machine 2.

The groove cutter 13 for forming the grooves a, a1 is constructed as follows. That is, as shown in FIG. 2 to FIG.
In addition, a turning table 17 equipped with a hydraulic drive system 15 by an engine and a cabin 16 and the like are provided so as to be able to turn around a vertical line, and a guide frame 19 provided with an elevating frame 18 is mounted on the turning table 17 with a traveling vehicle body 14. A hydraulic cylinder 21 for changing the attitude of the guide frame 19 is provided between the guide frame 19 and the swivel table 17 so as to be able to change the attitude around a horizontal axis 20 in the traveling direction of the vehicle. A hydraulic cylinder 22 for raising and lowering the elevating frame 18 is provided between the hydraulic cylinder 22 and the guide frame 19.

A bit for groove cutting is formed on the elevating frame 18 so that the elevating frame 18 is extended to the outside in the width direction of the vehicle body 14 in a state where the elevating frame 18 is turned to the left or right of the traveling vehicle body 14. A drum 24 having a drum 23 is provided. Specifically, a drum bearing 25 on one end of the drum is moved up and down so that the drum 24 is almost cantilevered.
And a bearing 26 having a thin structure in the axial direction for supporting the other end side of the drum 24 in an auxiliary manner is provided on a frame 27 which is vertically connected to the lifting frame 18.

A hydraulic motor M driven by the supply of pressure oil from the hydraulic drive equipment 15 is provided on the upper side of the lifting frame 18 and a sprocket wheel 28 fixed to an output shaft of the motor M and a drum shaft. , 29 to form a drum driving means 31 for driving the drum 24 to rotate around a horizontal axis in the width direction of the traveling vehicle body 14 by winding the chain sprocket 30.

Further, position fixing means 32 for fixing the guide frame 19 whose posture has been changed about the horizontal axis 20 at two positions is provided over the body frame 33 and the guide frame 19.

That is, on both the left and right sides of the body frame 33, 2
Two pairs of brackets 34, 34 are provided before and after the body frame 33, and each pair of brackets 34, 3
4, the pin holes b and c around the same radius around the horizontal axis 20 are formed, and a pair of brackets 35 are sandwiched by one of the brackets so as to sandwich one of the brackets. , 35 are provided on the lifting frame 18, and the brackets 35, 35 are formed with pin holes d, which are concentric with one of the pin holes b, c.

Therefore, as shown in FIG.
Guide frame 19 with connecting pin 36 inserted therethrough
7 shows a state B in which the groove cutting direction by the bit-equipped drum 24 is oriented vertically, and as shown in FIG. 7, in the fixed state of the guide frame 19 in which the connecting pin 36 is inserted through the pin holes c and d. , Drum 2 with bit
4 shows a state C in which the groove cutting direction is directed to the lower end of the groove outward, and the position fixing means 32 includes:
This also prevents the guide frame 19 from shifting in the front-rear direction.

In this embodiment, as a groove a formed in advance in the running surface portion R by the groove cutting machine 13 having the above-described configuration, a drum 24 provided with a groove cutting bit 23 is provided in an up-cut direction indicated by an arrow E (FIG. In FIG. 5, grooves a are formed in the bedrock of the running surface R in a lattice shape oblique to the running direction, as shown in FIG. As shown in the figure, a groove a1 along the traveling direction of the cutting machine 2 is formed on the rock at the time of the law, and on the surface of the rock,
After forming an independent rock part having a free surface and being vulnerable to impact, the independent rock part is cut by the cutter 2.

In the grooving machine 13 having the above structure, the bearing 26 on the other end of the drum has a thin structure in the axial direction. State B in which the cutting direction is vertically oriented
However, the groove a1 can be formed close to the slope N.

As described above, by forming a plurality of grooves a in advance in the bedrock of the running surface portion R, the bit 2 of the self-propelled cutting machine 2 is formed.
3 can be efficiently cut with a light load, easily and with a small impact force, thereby reducing the wear of the bit 23.

Further, since the groove a1 is previously formed in the rock at the end of the process, as shown in FIG. 6, a stepped step D is formed on the slope N, but the overhang dimension L is Therefore, the slope N having a small slope and a steep slope can be formed.

Alternatively, it is also possible to form a slope N with a normal slope in a vertical state, that is, by changing the attitude of the guide frame 19 and changing the groove cutting direction by the bit-equipped drum 24 into two states B and C. 7 and the cutting depth by the drum 24 is adjusted by the lifting frame 18.
As shown in the figure, a vertical groove a1 and a groove a1 that penetrates in an oblique direction are formed in advance in a step portion forming portion at the time of the process, and after performing processing to eliminate the step portion D in the rock at the time of the process, By cutting the running surface portion R by the self-propelled cutting machine 2, a slope N having a vertical slope can be formed.

The plurality of grooves a formed in advance in the bedrock of the running surface portion R are not limited to the above-described form, and for example, a groove a perpendicular to the running direction of the cutting machine 2 may be added, or The groove a1 formed in the rock at the time of the law may be omitted. For example, the groove a1 formed in the rock at the time of the law may be omitted.
As shown in FIG. 8, a stepped step D having a large overhang dimension L is formed on the slope N. However, as shown in FIG. The groove cutting direction of the drum 24 is switched between two states (only the state B is shown), and the groove cutting depth of the drum 24 is adjusted. By breaking part D, the slope N
This can be formed to have a steep slope including the vertical.

Further, as shown by the imaginary line in FIG. 8, depending on the situation at the site, the bedrock F may remain at the bottom of the valley (at the valley). This has been described with reference to FIG. ,
The remaining bedrock F can be eliminated by changing the attitude of the guide frame 19 as needed and adjusting the groove cutting depth by the drum 24.

In the above-described embodiment, the swivel base 17 is provided on the self-propelled traveling body 14 and the lift frame 1
8 and the drum 24 with the bit is rotated in the up-cut direction to form the grooves a,
Although a1 is formed, the grooves a and a1 may be formed by rotating the drum 24 in the downcut direction.

At the reciprocating end of the groove cutter 13, the fixing of the guide frame 19 by the position fixing means 32 is released as shown in FIG. By rotating the swivel table 17 through 180 degrees, and by omitting the illustration, the guide frame 19 is fixed by the position fixing means 32, so that the grooves a,
Although the a1 can be formed efficiently, the turntable 17 may be omitted and the guide frame 19 may be provided on the self-propelled traveling body 14 itself.

Further, it is not essential to change the attitude of the guide frame 19 around the horizontal axis 20. The groove cutting direction by the bit-equipped drum 24 is selected from the two states B and C, and the guide frame 19 is changed. May be fixed to the traveling vehicle body 14.

[0039]

As described above, the present invention focuses on the fact that cracks are present in the rock, that is, the continuity of the rock is broken, and the impact strength of the independent rock between the cracks is reduced. On the basis of this, in the invention according to claim 1, a plurality of grooves corresponding to shallow cracks are previously formed in the rock included in the running surface portion of the cutting machine, and the surface portion of the rock The self-propelled cutting machine cuts the rock with a light load, easily and with a small impact force, and wears the bit. Has also been reduced.

If there is a bedrock at the time of departure from the running surface of the self-propelled cutting machine, a groove different from the plurality of grooves previously formed on the running surface is also formed on the bedrock. It is preferable to cut the running surface in which a plurality of grooves are formed in advance by a self-propelled cutting machine so that the slope including the vertical is formed at a desired slope. The use of a breaker is not required, or the use of a breaker is achieved with a slight effect.

According to the fourth and fifth aspects of the present invention, there is provided a grooving machine suitable for use in the rock cutting method. Preferably, the attitude of a drum provided with a grooving bit is changed. It is possible to provide a grooving machine capable of forming a slope having a desired slope, including a vertical direction.

[Brief description of the drawings]

FIG. 1 is a schematic vertical sectional side view of a self-propelled cutting machine.

FIG. 2 is a side view of the grooving machine.

FIG. 3 is a plan view of a main part of the grooving machine.

FIG. 4 is a vertical sectional front view of a main part of the groove cutting machine.

FIG. 5 is a plan view of a groove formed in advance on a running surface portion.

FIG. 6 is an explanatory view of a groove cutting mode in which a groove cutting direction is directed vertically.

FIG. 7 is an explanatory view of a groove cutting mode in which a groove lower end is directed outward.

FIG. 8 is an explanatory view of forming a vertical slope according to another embodiment.

FIG. 9 is an explanatory view of turning a guide frame.

FIG. 10 is an explanatory view of cutting a running surface portion in a conventional example.

[Explanation of symbols]

2 ... Self-propelled cutting machine, 10 ... Cutting bit, 14 ... Self-propelled traveling body, 17 ... Slewing table, 18 ... Elevating frame, 19
... Guide frame, 20 ... Horizontal axis, 23 ... Bit for cutting grooves, 24 ... Drum, 31 ... Drum driving means, R ... Running surface part, a, a1 ... Groove.

Continuation of the front page (72) Inventor Toshina Fukuda 1-111-18, Sannichi, Minato-ku, Osaka City, Osaka Prefecture Inside Okumura Kumi Civil Engineering Co., Ltd. (72) Inventor Koji Hasegawa 1-2-2 Sakuragaoka, Setagaya-ku, Tokyo No.22 Inside Maru Matecnica Co., Ltd. (72) Inventor Toshiaki Nakajima 1-22 Sakuragaoka, Setagaya-ku, Tokyo F-term inside Maru Matecnica Co., Ltd. 2D065 DA07 DA12 DA12 DB05 DB07

Claims (6)

[Claims] 1. A method for cutting a running surface of a self-propelled cutting machine, wherein a plurality of grooves are formed in advance in a rock included in the running surface of the cutting machine. 2. A self-propelled cutting machine comprising a plurality of drums with cutting bits rotatable around a horizontal axis in a machine body width direction. The rock cutting method according to claim 1, wherein the rock is cut. 3. The self-propelled cutting machine according to claim 1, wherein a rock other than a plurality of grooves formed in advance on the running surface portion is formed in the bedrock at the edge of the running surface portion deviating from the running surface portion. The rock mass cutting method described. 4. A self-propelled traveling vehicle body is provided with a guide frame provided with an elevating frame, and a drum provided with a groove cutting bit is projected from the elevating frame outward in the width direction of the vehicle body. And a drum driving means for driving and rotating the drum about a horizontal axis in the width direction of the vehicle body. 5. A self-propelled traveling vehicle body is provided with a swivel base capable of turning around a vertical line, a guide frame provided with an elevating frame is connected to the swivel base, and the elevating frame is connected to the elevating frame. A drum provided with a groove cutting bit is provided so as to protrude outward in the width direction of the vehicle body in a state where it is turned to the left or right of the traveling vehicle body, and this drum is disposed in the width direction of the vehicle body. A grooving machine comprising a drum driving means for driving and rotating about a horizontal axis. 6. The vehicle according to claim 4, wherein said guide frame is configured to be capable of changing its attitude about a horizontal axis in a traveling direction of a traveling vehicle body.
Or the grooving machine described in 5.