JP4520571B2 - Groove cutting machine and rock cutting method using it - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a groove cutting machine and a rock cutting method using the groove cutting machine.
[0002]
[Prior art]
For example, when building roads, dam power stations, etc., for example, when excavating mountain tunnels, in the past, blasting was used to expel hard rock, but noise and vibration were Large, seriously affecting the surrounding private houses, existing dams, power plants, etc. Furthermore, loosening of the bedrock under blasting not only causes a decrease in the strength of the foundation, but also leads to water leakage There was a problem in terms.
[0003]
In addition, there was a means of crushing the rock mass using a large breaker, and a static crushing means of filling the hole drilled in the rock mass with an expansion material and breaking the rock mass. There was a problem in that the capacity was low, the large breaker was noisy, and the static crushing method was expensive.
[0004]
Therefore, in recent years, as shown in FIG. 9 , the rock mass is made low in noise and low by using a self-propelled cutting machine 2 provided with a drum 11 with a large number of cutting bits so as to be rotatable around the horizontal axis in the body width direction. A method of cutting by vibration has been adopted.
[0005]
In this construction method, the cutting bit 10 is pressed against the rock by the dead weight of the cutting machine 2, the drum 11 with the cutting bit is rotated, and the cutting machine 2 is run so that the running surface R of the self-propelled cutting machine 2 According to this construction method, the above-mentioned self-propelled cutting machine 2 is applied to a construction site such as a road or a dam power plant or the lower half of a mountain tunnel where the upper half is excavated. And running the cutting machine 2 while rotating the drum 11 with the bit, the cost of the rock surface of the running surface R is low and the vibration is low compared with the breaker and the static crushing means. Can cut efficiently.
[0006]
[Problems to be solved by the invention]
By the way, with the above cutting means, it is inevitable that the bit tip wears with the rock cutting. However, when the strength (hardness) of the rock is high, the bit tip wear increases extremely, There was a problem in that the cutting ability was lowered because the bit pressed against the bedrock by the weight of the machine 2 did not bite into the bedrock.
[0007]
Further, in the self-propelled cutting machine 2 described above, the bearings at both ends of the horizontal axis of the drum 11 with the bit project greatly to the left and right sides of the machine body. However, when the running surface R is dug down sequentially when creating a cutting road, a stepped step portion D having a large overhanging dimension L is formed on the cutting slope N. The slope of the slope is gentle, and the same is true for the excavation of a mountain tunnel with a wall surface. This step D is inconspicuous, and the slope and tunnel wall surface including the vertical The current situation is that a breaker is used for steep slopes, as noise is unavoidable.
[0008]
In addition to this, as a self-propelled cutting machine, a power cutter, a trencher, a ripper dozer, an impact ripper (these machines have a function of excavating and cutting rock, but in the present invention, these Various self-propelled cutting machines such as the above-mentioned machines and machines equipped with the drum with cutting bit described above so as to be rotatable about the horizontal axis in the width direction of the machine body are used. However, if the strength of the rock mass is high, the wear of the ripper or the like will increase drastically or the cutting ability will decrease, and the rock mass cutting during the process will be difficult. When finishing the surface to a predetermined gradient, a breaker is used that generates noise and is inefficient.
[0009]
The present invention has been made in view of such circumstances, and can efficiently cut the rock included in the traveling surface portion of the above-described various self-propelled cutting machines. Reduces the overhanging dimension of the step formed on the construction method that reduces wear such as bits and ripper of the traveling cutting machine and the slope such as cutting (hereinafter also referred to as the wall of the mountain tunnel). It is an object of the present invention to provide a groove cutting machine suitable for use in these methods, as well as methods that can be formed to a desired method gradient as required.
[0010]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a self-propelled traveling vehicle body provided with a swivel base capable of swiveling around a vertical line, and a guide frame provided with a lifting frame on the swivel base. The lifting frame is provided with a drum provided with a bit for groove cutting so that the lifting frame is swung to the left or right of the traveling vehicle body and protrudes outward in the width direction of the vehicle body, and A groove cutting machine comprising drum driving means for driving and rotating the drum with a bit around a horizontal axis in the width direction of the traveling vehicle body,
The posture of the guide frame is changed to a state in which the groove cutting direction by the drum with a bit is directed vertically and a state in which the groove cutting direction by the drum with a bit is directed obliquely outward around the horizontal axis of the traveling direction of the traveling vehicle body. It is configured to be able to
Furthermore, a hydraulic cylinder for changing the posture of the guide frame is provided across the guide frame and the swivel, and a hydraulic cylinder for raising and lowering the lift frame is provided across the lift frame and the guide frame. And a position fixing means for fixing the guide frame whose posture is changed around the horizontal axis in the traveling direction of the traveling vehicle body is provided across the vehicle body frame and the guide frame. A machine is provided (claim 1).
Further, according to another aspect of the present invention, a self-propelled traveling vehicle body is provided with a swivel base capable of swiveling around a vertical line, and a guide frame provided with a lift frame is connected to the swivel base, and the lift The frame is provided with a drum having a bit for groove cutting so that the lifting frame protrudes outward in the width direction of the vehicle body in a state where the lifting frame is swung to the left or right of the traveling vehicle body. A groove cutting machine comprising drum driving means for driving and rotating the attached drum about the horizontal axis in the width direction of the traveling vehicle body, wherein the guide frame is positioned around the horizontal axis in the traveling direction of the traveling vehicle body, The groove cutting direction by the drum with the bit is vertically changed, and the groove cutting direction by the drum with the bit is configured to be changed obliquely outward. And a groove cutting machine provided with a hydraulic cylinder for changing the posture of the guide frame over the swivel base and with a hydraulic cylinder for raising and lowering the lift frame over the lifting frame and the guide frame. It is a method of cutting the running surface part of a self-propelled cutting machine using,
A rock cutting method is provided in which a plurality of grooves are formed in advance in the rock included in the traveling surface portion of the self-propelled cutting machine (Claim 3).
[0011]
That is, the strength (hardness) of the rock mass depends on the strength of the rock itself, but also depends on the ratio of cracks and cracks (hereinafter referred to as cracks). Since the rock mass is formed and made independent between the cracks, and the impact strength of the independent rock mass is reduced, it goes without saying that the more the cracks are, the easier the rock is to be crushed.
[0012]
The present invention has been made paying attention to this point, and a plurality of grooves corresponding to shallow cracks are formed in the surface portion of the rock mass, and specifically, the surface portion of the rock mass is divided. The independent rock mass that is free from impact and has a free surface is formed on the surface of the rock mass by a groove along the traveling direction of the cutting machine, a groove orthogonal to the traveling direction, and a slanted groove with respect to the traveling direction. It is characterized by forming and cutting this independent rock part, and by this, while running a self-propelled cutting machine equipped with a large number of drums with cutting bits so as to be rotatable around the horizontal axis in the body width direction, Even if the traveling surface portion is cut, or even if the above-mentioned various self-propelled cutting machines (power cutter, trencher, ripper dozer, impact ripper, etc.) are driven and the traveling surface portion is cut, Cutting, light And as it can efficiently cut a simple and small impact force load, thereby it's also reduced wear of such bits or ripper.
[0013]
Here, in the case where a rock mass exists when the traveling surface portion of the self-propelled cutting machine is removed, it is preferable that a groove different from the plurality of grooves formed in advance on the traveling surface portion is also formed on the rock surface. It is.
[0014]
That is, in a self-propelled cutting machine, a stepped portion having a large overhang dimension is formed on the slope, but if a groove is formed in advance at the site where this stepped portion is formed, that is, a plurality of strips are formed in advance. By cutting the running surface part formed with the groove with a self-propelled cutting machine, it is possible to form a slope with a small protruding dimension of the step part so that the use of a breaker for removing the step part is unnecessary, Even if a breaker is used, it will be fine, and furthermore, by adjusting the depth and angle of the groove formed in advance during the method, it is possible to form a slope with a desired slope, including the vertical. Easy to do.
[0015]
[0016]
[0017]
In any of the groove cutting machines described above, as the vehicle body travels, the 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. Prior to the self-propelled cutting machine, the grooves along the traveling direction of the cutting machine, the grooves perpendicular to the traveling direction, and the grooves oblique to the traveling direction are further moved by the cutting machine. By forming multiple strips on the rock mass included in the surface and forming an independent rock mass on the surface of the rock mass that has a free surface, it is possible to efficiently cut the running surface with a self-propelled cutting machine. Can do.
[0018]
In addition, the groove is formed by adjusting the depth in advance by these groove cutting machines, and the guide frame can be configured to change the posture around the horizontal axis in the traveling direction of the traveling vehicle body. By adjusting the angle, a slope with a desired slope can be formed including the vertical.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a self-propelled cutting machine 2 provided with a cutting means 1 for cutting the running surface portion R, and the cutting means 1 is arranged between front and rear traveling machine bodies 4 and 5 provided with a crawler type traveling device 3. At the same time, the traveling machine body 5 on the rear side is provided with a conveyer 6 for conveying cut objects to the rear of the machine body, and a conveyor 8 for loading cut objects onto the dump truck 7 and the like.
[0020]
The cutting means 1 includes a body frame 9 that can be rolled over the front and rear traveling body bodies 4 and 5 so that the horizontal posture can be maintained, and as is apparent with reference to FIG. The drum 11 having a plurality of exchangeable cutting bits 10 in a spiral shape is rotatably provided around the horizontal axis in the machine width direction, and the drum driving means 12 is provided at one shaft end of the drum 11. When the front and rear traveling bodies 4 and 5 are driven forward while rotating the drum 11 with the excavating bit 11 in the upcut direction (clockwise direction in the drawing) indicated by the arrow A, the traveling including the rock mass is performed. The surface portion R is cut by the bit 10.
[0021]
The cut material is collected in the center by a cutting bit 10 provided in a spiral shape, conveyed rearward through the conveying conveyor 6 and the loading conveyor 8, and loaded on, for example, a dump truck 7 and used as one of embankment materials. For example, when creating a cut-through road, the self-propelled cutting machine 2 is reciprocated to sequentially cut the running surface portion R, thereby forming a cut slope on both sides of the road.
[0022]
When the traveling surface R is cut by the self-propelled cutting machine 2 described above, when the traveling surface R includes a rock or when the traveling surface R itself is a rock, as shown in FIGS. A plurality of grooves a are formed in advance on the rock surface so as to break the continuity of the rock of R, and further, a groove a1 is formed in the rock bed in the off-road from the running surface R, and these grooves a, a1 The bedrock divided by is cut by the self-propelled cutting machine 2.
[0023]
The groove cutting machine 13 for forming the grooves a and a1 is configured as follows. That is, as shown in FIGS. 2 to 4, a crawler type self-propelled traveling vehicle body 14 is provided with a swivel base 17 equipped with an engine hydraulic drive equipment 15 and a cabin 16 so as to be able to turn around a vertical line. At the same time, a guide frame 19 provided with an elevating frame 18 is pivotally attached to the swivel base 17 so that the posture of the travel vehicle body 14 can be changed around the horizontal axis 20 in the travel direction. A hydraulic cylinder 21 for changing the posture of the guide frame 19 is provided, and a hydraulic cylinder 22 for raising and lowering the lifting frame 18 is provided across the lifting frame 18 and the guide frame 19.
[0024]
The elevating frame 18 is provided with a groove cutting bit 23 so that the elevating frame 18 protrudes outward in the width direction of the vehicle body 14 in a state where the elevating frame 18 is swung to the left or right of the traveling vehicle body 14. More specifically, a drum bearing 25 on one end side of the drum is provided on the elevating frame 18 so that the drum 24 is almost cantilevered, and the other end side of the drum 24 is supplementarily supported. For this purpose, a thin-walled bearing 26 in the axial direction is provided on a frame 27 that is suspended from the lifting frame 18.
[0025]
In addition, a hydraulic motor M that is driven by the supply of pressure oil from the hydraulic drive equipment 15 is provided on the upper side of the elevating frame 18, and the sprocket wheels 28 and 29 are fixed to the output shaft and the drum shaft of the motor M. The drum drive means 31 is configured to wind the chain procket 30 to drive and rotate the drum 24 around the horizontal axis of the traveling vehicle body 14 in the width direction.
[0026]
Furthermore, position fixing means 32 for fixing the guide frame 19 whose posture has been changed around the horizontal axis 20 at two positions is provided across the vehicle body frame 33 and the guide frame 19.
[0027]
That is, two sets of two pairs of brackets 34, 34 are provided on the front and rear of the body frame 33 on both the left and right sides of the body frame 33, and the positions of the pair of brackets 34, 34 are made different vertically. Two pairs of brackets 35 and 35 are provided in the lifting frame 18 so as to form pin holes b and c around the same radius around the horizontal axis 20 and sandwich one bracket 34. The brackets 35 and 35 are formed with a pin hole d concentric with one of the pin holes b and c.
[0028]
Therefore, as shown in FIG. 6, in the fixed state of the guide frame 19 through which the connecting pin 36 is inserted through the pin holes b and d, the state B in which the groove cutting direction by the drum 24 with a bit is directed vertically appears. As shown in FIG. 4, in the fixed state of the guide frame 19 through which the connecting pin 36 is inserted through the pin holes c and d, a state C is shown in which the groove cutting direction by the drum 24 with the bit is directed outward. Therefore, the position fixing means 32 also achieves prevention of displacement of the guide frame 19 in the front-rear direction.
[0029]
In this embodiment, a drum 24 provided with a groove cutting bit 23 is used as a groove a previously formed on the running surface R by the groove cutting machine 13 having the above-described configuration. As shown in FIG. 5, grooves a which are oblique with respect to the traveling direction are formed in a lattice shape in the rock surface of the traveling surface portion R as shown in FIG. In addition, a groove a1 along the running direction of the cutting machine 2 is formed in the normal rock mass, and an independent rock mass having a free surface is formed on the surface of the rock mass, and then the independent rock mass is cut. Cutting is performed by the machine 2.
[0030]
In the groove cutting machine 13 configured as described above, since the bearing 26 on the other end side of the drum has a thin structure in the axial direction, when the groove a1 is cut by the drum 24 with a bit, the cutting direction of the groove a1 is cut. Even in the state B in which the surface is directed vertically, the groove a1 can be formed close to the slope N.
[0031]
In this way, by forming a plurality of grooves a in advance in the rock surface of the running surface portion R, the rock rock cutting by the bit 23 of the self-propelled cutting machine 2 can be easily and efficiently cut with a light load and a small impact force. As a result, the wear of the bit 23 is also reduced.
[0032]
In addition, since the groove a1 is formed in advance on the rock at the time of the law, as shown in FIG. 6, although the stepped step portion D is formed on the slope N, the overhanging dimension L is reduced, Therefore, it is possible to form the slope N having a steep slope.
[0033]
Alternatively, it is also possible to form the slope N with a normal slope, that is, by changing the orientation of the guide frame 19 to switch the groove cutting direction by the drum 24 with the bit to the state C, and this drum As shown in FIG. 7, a vertical groove a <b> 1 and a groove a <b> 1 that bites in an oblique direction are formed in advance in the stepped portion forming portion as shown in FIG. 7. By cutting the traveling surface portion R with the self-propelled cutting machine 2 after performing processing to eliminate the stepped portion D on the bedrock at the time, the vertical surface N having a normal gradient can be formed.
[0034]
The plurality of grooves a formed in advance on the rock surface of the traveling surface portion R are not limited to the above-described formation form. For example, a groove a orthogonal to the traveling direction of the cutting machine 2 is added, or the orthogonal grooves a It is optional, such as replacing with a plurality of strips, and the groove a1 formed in the legal rock may be omitted. In this case, if the legal groove a1 is omitted, as shown in FIG. A stepped step portion D having a large dimension L is formed on the slope N, but as shown in FIG. 8, the orientation of the guide frame 19 is changed to change the groove cutting direction by the drum 24 with a bit. By switching to the state (only the B state is shown), adjusting the groove cutting depth by the drum 24, and breaking the step portion D after cutting the traveling surface portion R by the self-propelled cutting machine 2, Slope N, steep slope including vertical It can be formed.
[0035]
In addition, as shown by the phantom line in FIG. 8, depending on the situation of the site, the rock mass F may remain at the hoshiri (the valley), but this is necessary as described with reference to FIG. Accordingly, the remaining rock F can be eliminated by changing the attitude of the guide frame 19 and adjusting the groove cutting depth by the drum 24.
[0036]
In the above-described embodiment, the swivel base 17 is provided on the self-propelled traveling vehicle body 14, the guide frame 19 provided with the elevating frame 18 is connected thereto, and the drum 24 with the bit is arranged in the upcut direction. However, the drum 24 may be rotated in the down cut direction to form the grooves a and a1.
[0037]
[0038]
[0039]
【The invention's effect】
As described above, the present invention was made by paying attention to the fact that cracks exist in the rock mass, that is, the continuity of the rock mass is cut off, and the impact strength of the independent rock mass portion between the cracks is reduced. Based on this, a plurality of grooves corresponding to shallow cracks were formed in advance in the rock included in the running surface of the cutting machine, and an independent rock portion that was vulnerable to impact was formed on the surface of the rock. As a result, it has become possible to cut the rock mass with a self-propelled cutting machine easily with a light load and efficiently with a small impact force, and to reduce wear of the bit.
[0040]
And when the bedrock exists at the time of the departure from the running surface part of the self-propelled cutting machine, it is preferable to form a groove different from the plurality of grooves formed in advance in the running surface part on the bedrock as well. After that, by cutting the running surface part in which a plurality of grooves are formed in advance with a self-propelled cutting machine, it is possible to form a slope with a desired slope, including the vertical, to eliminate the step part. Even if the use of a breaker is not required or a breaker is used, it is achieved with a slight amount.
[0041]
Furthermore, it is possible to change the posture of the drum provided with a bit for groove cutting, thereby providing a groove cutting machine capable of forming a slope with a desired slope including vertical.
[Brief description of the drawings]
FIG. 1 is a schematic longitudinal sectional side view of a self-propelled cutting machine.
FIG. 2 is a side view of the groove cutting machine.
FIG. 3 is a plan view of the main part of the grooving machine.
FIG. 4 is a longitudinal front view of the main part of the grooving machine.
FIG. 5 is a plan view of a groove formed in advance on a running surface portion.
FIG. 6 is an explanatory diagram of a groove cutting mode in which the groove cutting direction is oriented vertically.
FIG. 7 is an explanatory diagram of a groove cutting mode in which a groove lower end is directed outward.
FIG. 8 is an explanatory diagram of vertical slope formation according to another embodiment.
FIG. 9 is an explanatory diagram of cutting of a running surface portion of a conventional example.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 2 ... Self-propelled cutting machine, 10 ... Cutting bit, 14 ... Self-propelled traveling vehicle body, 17 ... Swivel base, 18 ... Lifting frame, 19 ... Guide frame, 20 ... Horizontal axis of traveling direction of traveling vehicle body, 21 , 22 ... Hydraulic cylinder, 23 ... Bit for cutting grooves, 24 ... Drum, 31 ... Drum driving means, R ... Traveling surface portion, a, a1 ... Groove.

Claims (6)

A self-propelled traveling vehicle body is provided with a swivel base that can swivel around a vertical line, and a guide frame having a lift frame is connected to the swivel base, and the lift frame is attached to the right and left of the travel vehicle body. A drum provided with a bit for groove cutting is provided so that it protrudes outward in the width direction of the vehicle body in a state where it is swung in either direction, and this drum with a bit is installed on the horizontal axis of the traveling vehicle body in the width direction. A groove cutting machine comprising drum driving means for driving and rotating around,
The posture of the guide frame is changed to a state in which the groove cutting direction by the drum with a bit is directed vertically and a state in which the groove cutting direction by the drum with a bit is directed obliquely outward around the horizontal axis of the traveling direction of the traveling vehicle body. It is configured to be able to
Furthermore, a hydraulic cylinder for changing the posture of the guide frame is provided across the guide frame and the swivel, and a hydraulic cylinder for raising and lowering the lift frame is provided across the lift frame and the guide frame. And a position fixing means for fixing the guide frame whose posture is changed around the horizontal axis in the traveling direction of the traveling vehicle body is provided across the vehicle body frame and the guide frame. Machine. The position fixing means includes two pairs of brackets provided on the left and right sides of the body frame, and two pairs of brackets provided on the left and right sides of the body frame. A pin hole formed around the same radius around the horizontal axis in the traveling direction of the traveling vehicle body, and two sets of a pair of brackets with two pieces provided on the elevating frame so as to sandwich one bracket The groove cutting machine according to claim 1 , wherein a pin hole concentric with one of the pin holes is formed in a pair of brackets in two pieces provided on the lifting frame . A self-propelled traveling vehicle body is provided with a swivel base that can swivel around a vertical line, and a guide frame having a lift frame is connected to the swivel base, and the lift frame is attached to the right and left of the travel vehicle body. A drum provided with a bit for groove cutting is provided so that it protrudes outward in the width direction of the vehicle body in a state where it is swung in either direction, and this drum with a bit is installed on the horizontal axis of the traveling vehicle body in the width direction. A groove cutting machine comprising drum driving means for driving and rotating around, wherein the guide frame is oriented about the horizontal axis of the traveling direction of the traveling vehicle body so that the groove cutting direction by the drum with a bit is directed vertically. And a state in which the groove cutting direction by the drum with a bit is directed obliquely outward, and further, the front frame extends between the guide frame and the swivel base. A self-propelled cutting machine using a groove cutting machine provided with a hydraulic cylinder for changing the attitude of the guide frame and provided with a hydraulic cylinder for raising and lowering the elevating frame across the elevating frame and the guide frame A method of cutting the running surface of
A rock cutting method, wherein a plurality of grooves are formed in advance in a rock included in a traveling surface portion of the self-propelled cutting machine . A method of cutting a running surface portion of a self-propelled cutting machine using the groove cutting machine according to claim 1 or 2 , wherein a plurality of strips are previously formed on the rock included in the running surface portion of the self-propelled cutting machine. A rock cutting method characterized by forming grooves. The self-propelled cutting machine includes a large number of drums with cutting bits that can rotate about the horizontal axis in the width direction of the machine body, and the traveling surface portion of the self-propelled cutting machine is cut while the self-propelled cutting machine is running. Item 5. A rock mass cutting method according to item 3 or 4. Bedrock when law out of the running surface of the self-propelled cutting machine, any one of claims 3-5 which is a plural rows of grooves and forming another groove formed in advance to the travel surface The rock cutting method described in 1.

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