JPH084471A - Base rock drilling machine - Google Patents

Abstract

PURPOSE:To drill a slot efficiently by facilitating the discharge of the cutting chip produced in excavation. CONSTITUTION:The drilling machine is constituted so that a plurality of hole drilling rods 3 having each excavating pit 3a installed at the top end are arranged, and the slot 11 is drilled on a base rock layer by revolving and hitting these hole drilling rods 3, and at the top end of each hole drilling rod 3, a connecting member 4 which is formed by arranging the short cylinder parts into which these hold drilling rods 3 are inserted, in parallel is installed. The pushing advance is performed by a ring-shaped collar body 5 which is formed by sintering-fitting and fixing the rear end surface of the connecting member 4 on the hole drilling rod 3. The discharge of the cutting chip is facilitated by increasing the gap between the hole drilling rod 3 which extends rearward from the connecting member 4 and the wall of the excavation slot, and the cutting chip clogging inside the connecting member 4 can be removed in a simple manner.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a rock drilling machine for making a slot in rock by hitting and rotating a drilling rod.

[0002]

2. Description of the Related Art Conventionally, when, for example, excavating a tunnel in a rock layer, a large number of slots having an appropriate depth are formed in the tunnel length direction along the outer peripheral edge of the face of a planned tunnel. It is practiced to excavate the tunnel while removing the face ground surrounded by blasting. As such a punching device, there is known one having a structure in which a punching machine guide is attached to a tip end of a swing boom of a traveling vehicle body, and a punching machine is slidably mounted on an upper surface of the punching machine guide so as to be slidable back and forth. ing.

As shown in FIGS. 9 to 12, the structure of the punching machine is a rod guide A in which five long pipe bodies A1 are integrally arranged in parallel in the lateral direction at regular intervals by connecting pieces A2. In each of the long pipe bodies A1, the piercing rod B having the piercing bit B1 attached at the tip is inserted, and the front end portion of the rod guide A is slid on the bearing member D standing on the front end of the piercing machine guide C. On the front surface of a swivel F for supplying water into a rod B standing upright at the front end of a sliding base plate E, which is movably inserted and supported and whose rear end surface is movably arranged on a drill guide C. The perforating rods B that are fixed and further project rearward from the swivel F are connected to the rotating device G disposed on the perforator guide C, and the striking device H disposed on the rear side of the rotating device G. Is configured so that the rear end surface of each piercing rod B is tapped.

Then, the sliding base plate E is advanced to bring the tip bit B1 of the drilling rod B into a state of being pressed against the bedrock layer, and then each drilling rod B is rotated by the rotating device G and tapped by the striking device H. By advancing the drilling rod B, a slot hole is excavated in the rock layer.

[0005]

However, according to such a conventional drilling machine, the rod guide A composed of the long pipes A1 arranged in parallel with each other as the drilling rod B advances the groove into the groove. Since the groove is inserted over the entire length from the opening end of the groove hole to the vicinity of the tip of the drill bit, the clearance between the groove hole and the rod guide A is small and the chipped powder ejected from the tip of the drilling rod B is discharged. The smooth circulation of the working fluid may be hindered, and it may be difficult to discharge the powder.

[0006] Further, it is difficult to discharge dust and the like into the long pipe body A1 of the rod guide A to be clogged between the long pipe A1 and the piercing rod B, causing a failure of the piercing machine. Moreover, even if it is attempted to remove the clogging powder and the like, since the rear end of the long pipe A1 is fixed to the front end face of the swivel F, there is a problem that the removal work is extremely difficult. .

The present invention has been made in view of the above problems, and provides a rock drilling machine capable of smoothly discharging the dust and the like and easily removing the jam even if the clogging occurs. It is intended.

[0008]

In order to achieve the above object, a rock drilling machine according to claim 1 of the present invention is a drilling machine for drilling rock by means of a drilling rod having a drill bit at its tip. The present invention according to claim 2 has a structure in which a ring-shaped collar body is fixed by shrink fitting at a suitable position of the drilling rod, and the drilling rod having a drill bit attached to the tip thereof is hit or rotated. In a boring machine for boring rock, a ring which is relatively movable in the length direction of the rod and which is slidably in contact with a wall of the hole is fitted on the boring rod and pressed against the rear end surface of the guide casing. It has a structure in which a brim body is fixed by shrink fitting.

According to a third aspect of the present invention, in the rock drilling machine, a plurality of drilling rods each having a drilling bit attached to the tip thereof are arranged in parallel, and the drilling rods are driven to rotate to drill the rock mass. In the punching machine, at least one connecting member is provided, in which short tubular portions in which the distal end portions of the respective drilling rods are slidably inserted are arranged in parallel, and adjacent short tubular portions are integrally connected by a connecting portion. And a ring-shaped collar body that is fixed to the perforated rod by shrink fitting and presses against the rear end surface of the connecting member.

In the boring machine according to the third aspect, it is desirable that the number of boring rods is an even number. Further, in the rock drilling machine having the above structure, it is preferable that the drilling rod portion, in which the ring-shaped collar body is fixed by shrink fitting, is formed in the small diameter portion.

[0011]

According to the invention as set forth in claim 1, when the boring rod is rotated and hit to punch the rock hole in the rock layer, the ring tends to bend at the time of hitting. The groove hole can be accurately advanced in a straight line while being prevented by the flanged body, and the drilled dust is discharged rearward through a relatively large gap between the drill rod and the hole wall.

Further, when the rock drilling machine according to the second aspect of the present invention rotates and hits the drilling rod to form the groove hole in the rock layer, the guide casing slides on the wall surface of the groove hole to form the groove. The boring rod is inserted into the hole and is guided by the guide casing to advance in the longitudinal direction to form the slot while preventing the wall of the hole from collapsing. Further, as the boring rod advances, the ring-shaped brim portion fixed to the rod presses against the rear end surface of the guide casing, and the guide casing integrally advances. Even if the drilling rod and the guide casing are clogged with dust during this digging work, the guide casing is movable in the length direction with respect to the drilling rod, and the front and rear ends of the guide casing are exposed to the outside. Since it is opened as a result, it is possible to easily perform the work of removing the powdered dust.

Further, as in the punching machine according to claim 3,
When a groove is dug by a piercing rod by using a connecting member that has a short tubular portion through which the tip end portion of each piercing rod is inserted and integrally connects adjacent short tubular portions with a connecting portion. In this state, the connecting member is inserted deeply into the slot integrally with the tip of the drilling rod, and only the drilling rod is inserted between the rear end of the connecting member and the open end of the slot. While the space for discharging the dust powder in the groove becomes large, and the gap between the connecting member and the wall surface for excavating the groove is short, the discharge of the powder by supplying the fluid can be smoothly and easily performed.

Further, since the length of each short tube portion of the connecting member is extremely short, even if the inside of the short tube portion is clogged,
By performing an operation such as moving the connecting member back and forth with respect to the drilling rod, the removal work of the dust and the like can be performed more easily, and the occurrence of the failure is almost eliminated, and the efficient drilling work of the slot hole is enabled. Further, since the respective short tubular portions of the connecting member are integrally connected by the connecting portion, the plurality of piercing rods can be dug in the length direction at regular intervals without being twisted with each other. Of course, by making the number of the piercing rods even and making the rotation directions of the adjacent piercing rods opposite to each other, it is possible to pierce the slot holes with high accuracy while canceling out the torques that try to twist each other.

Further, since the ring-shaped brim body that is pressed against the rear end of the connecting member to advance the connecting member together with the perforating rod is fixed to a predetermined portion of the perforating rod by shrink fitting, the perforating rod and the ring-shaped brim. Not only the body is firmly integrated, but also the structure is extremely simplified. Furthermore, by forming the perforated rod portion to which the ring-shaped collar body is fixed in a small diameter part, the ring-shaped collar body can be accurately It can be fixed to the position and the fixing force becomes stronger.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, referring to the drawings, an embodiment of the present invention will be described. Referring to FIGS. 1 and 2, a punching machine guide 1 having a flat rectangular shape having a long constant width in the front-rear direction and a guide 1 on the guide 1. A base plate 2 which is slidable forward and backward, and a plurality of, preferably four, perforated rods 3 which are arranged in parallel in the width direction of the guide 1 at regular intervals, and which are metal rods of a constant length, A connecting member 4 in which the distal end portions of the perforating rods 3 are fitted so as to be movable back and forth, and an iron or steel ring-like member fixed to the perforating rod 3 and pressed against the rear end surface of the connecting member 4. It is composed of a collar body 5, a rotating device 6 installed on the base plate 2 for rotating the drilling rod 3, and a striking device 7 for tapping the rear end surface of the drilling rod 3.

To explain this structure in more detail, the perforated rods 3 arranged in parallel are arranged between the bearing member 8 standing and fixed on the front end upper surface of the guide 1 and the bearing member 9 standing and fixed on the front end upper surface of the base plate 2. Are installed side by side in a erected state, and the front and rear parts thereof are inserted into these front and rear bearing members 8 and 9 so as to be rotatable and slidable back and forth,
An excavating bit 3a having a diameter larger than that of the rod 3 is attached to the tip of a rod that is supported and protrudes forward from the front bearing member 8, and adjacent excavating bits 3a, 3a are alternately arranged as shown in FIG. When viewed from the front by shifting in the front-back direction,
The excavation bits 3a, 3a are combined so that a part of them overlaps. Further, a retaining collar 3b having a larger diameter than the rod 3 is formed at the rear of each rod 3 protruding rearward from the rear bearing member 9 by forging, and the collar 3b is formed.
To the rear end is formed in the angular shaft portion 3c.

The connecting member 4 comprises a plurality of short tube portions 4a, 4b having a diameter smaller than that of the excavating bit 3a, arranged in parallel at every parallel spacing of the rods 3, and adjacent side surfaces of the short tube portions 4a, 4b having a plate piece shape. Of the perforated rod 3 projecting from the front bearing member 8 are inserted into the respective short tubular portions 4a and 4b so as to be movable back and forth, respectively.
The space is kept constant. In addition, adjacent drill bit 3a
Depending on the deviation in the length direction of the one short tube portion 4a is a shape extending from the front end of the other short tube portion 4b by a certain length, the front end of these short tube portions 4a, 4b of the drill bit 3a. It is close to the rear end.

The ring-shaped collar body 5 to be pressed against the rear end surface of the connecting member 4 is formed so that its outer diameter is slightly smaller than that of the short tubular portions 4a and 4b, and each of the perforations protruding from the front bearing member 8 is formed. It is fixed to a predetermined portion of the tip of the rod 3. This fixation is performed by forming the inner diameter of the ring-shaped collar body 5 to be slightly smaller than the diameter of the perforated rod 3 and heating the ring-shaped collar body 5 at a high temperature so that the inner diameter becomes smaller than that of the perforated rod 3. It is performed by a shrink fitting means in which the piercing rod 3 is inserted to a predetermined portion in a state where the piercing rod 3 is expanded so as to have a large diameter, and the piercing rod 3 is crimped by contraction by cooling.

The piercing rod 3 may be formed to have the same diameter over the entire length, but as shown in FIG. 4, the tip portion projecting from the front bearing member 8 is formed to have a small diameter, and the small diameter is formed. Ring-shaped collar body 5 whose inner diameter is slightly smaller than the part
The annular step surface 3d formed at the connecting portion with the large diameter portion of the drilling rod 3 by heating and expanding the
It is preferable that the ring-shaped collar body 5 is fixed at a position where it abuts against the ring-shaped collar body 5. By doing so, the ring-shaped collar body 5 can be easily fixed at an accurate position, and even if the fixation is incomplete, The backward movement can be blocked by being received by the step surface 3d. Note that only the fixed portion of the ring-shaped collar body 5 may be formed to have a small diameter without forming the distal end portion of the boring rod 3 to have a small diameter over the entire length. Reference numeral 3e is a bit attachment screw portion formed at the tip of the boring rod 3.

As is well known, the rotating device 6 for rotationally driving the plurality of parallel perforated rods 3 as described above has a cylindrical body having a square hole through which the rear end angular shaft portion 3c of each perforated rod 3 is inserted. Are rotatably arranged side by side, gears fixed to the outer peripheral surface of each cylinder are meshed with each other, and the cylinders on the side end side are rotated by a motor. Further, a striking device 7 for tapping the rear end surface of the piercing rod 3 is also known, and the structure thereof is such that the rear end surfaces of all the piercing rods 3 are simultaneously shuffled via an appropriate intermediate member at the tip of the rod of the hydraulic cylinder that moves back and forth. It is configured to hit.

In the front-back sliding mechanism of the base plate 2 on which the rotating device 6 and the striking device 7 are mounted and installed, as shown in FIG. 1, the base plate 2 is arranged in the guide 1. This endless chain is connected to an endless chain 10 or a rotating screw rod.
Alternatively, it can be moved back and forth by driving a screw rod or a motor.

The punching machine constructed as described above is mounted in a state in which the punching machine guide 1 is attached to the tip of a boom which is vertically and horizontally provided on a traveling carriage via a hydraulic jack or the like. Is operated to direct the drilling machine guide 1 to the face of the rock face, and the drilling bit 3a of the drilling rod 3 is brought into contact with a predetermined drilling position on the face of the rock face at a predetermined insertion angle.

Thereafter, the boring rod 3 is rotated by the rotating device 6 and the rear end face thereof is tapped by the striking device 7 to drive the excavation bit 3a of the perforating rod 3 into the rock layer to excavate the slot 11. At this time, as shown in FIG. 3, if the number of the perforated rods 3 arranged in parallel is four, the rotating device 6
By this, the twisting action forces due to the rotation of the piercing rods 3 which are alternately rotated in the opposite directions are canceled each other, and the piercing rods 3 can be accurately drilled without shaking.

In this way, the rear end surface of the perforating rod 3 is tapped by the striking device 7 to excavate the slot 11 as shown in FIGS. 5 and 6, and the base plate 2 is moved forward on the perforator guide 1 to be parallel to each other. Integrally propels the drilled rod 3
The slot 11 is dug to a desired depth. At that time, the ring-shaped collar body 5 fixed to the front part of the piercing rod 3 is integrally advanced by the propelling of the piercing rod 3, and the rear end surface of the connecting member 4 fitted to the tip part of the piercing rod 3 is advanced. The connecting member 4 is integrally advanced while being pressed against. In the illustrated structure, the ring-shaped collar body 5 is fixed to each drill rod 3, but at least one or more arbitrary drill rods 3 are provided.
It suffices to fix the ring-shaped collar body 5 to the.

Each boring rod 3 is provided with a pressure water supply passage (not shown) which opens from the rear end to the tip of the excavation bit 3a at the center thereof, and the excavation by the excavation bit 3a is performed from outside the machine through this passage. By supplying and jetting pressured water to the portion, the drilled dust is sent backward together with the pressured water in the slot 11 and discharged from the face face to the outside.

At this time, the starch powder is pressed together with the pressure water into the connecting member 4.
Although it flows rearward through the gap between the outer peripheral surface of the hole and the wall surface of the groove hole 11, the length of the connecting member 4 only fits the short length part of the tip end of the piercing rod 3. Has a very short length and passes through the gap instantaneously together with the pressure water. After the passage, the connecting member 4 does not exist and the piercing rod 3 is exposed. Since the gap between them is large, they flow smoothly and are discharged rearward.

Further, when a boring powder or the like enters the connecting member 4 and becomes clogged, the boring rod 3 is pulled out from the slot 11 and the excavating bit 3a is removed.
Since it can be easily removed from the distal end, it can be easily removed at the time of extraction or by performing an operation such as moving the connecting member 4 back and forth in the length direction of the piercing rod 3.

Next, FIG. 7 shows another drilling machine according to the present invention, in which a drilling rod 13 having a drill bit 13a detachably attached to the tip thereof has a cylindrical shape having substantially the same outer diameter as the drill bit 13a. The guide casing 14 is fitted and the rear end opening of the guide casing 14 is closed by a lid body 16, and the drilling rod 13 is slidable in a central hole 17 penetrating the central portion of the lid body 16. And the lid 16
The rear end face is configured to be pushed forward by the ring-shaped collar body 15 fixed to the perforated rod 13 by shrink fitting.

FIG. 8 shows another drilling machine according to the present invention, which does not use the connecting member 4 and drills a drilling rod.
A ring-shaped collar body 25, which is in sliding contact with the wall surface of the excavation hole, is fixed to the tip of 23 by shrink fitting. Further, the ring-shaped collar body 25 is configured to prevent the bending of the piercing rod 23 and accurately form a straight-ahead hole.

[0031]

As described above, according to the rock drilling machine of the present invention, since the ring-shaped brim is fixed to the drilling rod by shrink fitting, the drilling rod and the ring-shaped brim are firmly integrated. Not only can it be structured, but the structure is simple, and by providing a small diameter portion on the drilling rod, it becomes a structure in which a ring-shaped collar body is accurately fixed at a predetermined position, and this ring-shaped collar body is claimed. As described in Item 1, when the slide hole is slidably contacted with the wall of the excavation hole, the slot hole can be accurately drilled in a straight line shape without causing bending of the drilling rod, and the drilled dust is drilled. It can be smoothly discharged through the gap between the rod and the hole wall.

Further, according to the rock drilling machine of the second and third aspects, the guide casing is slidably fitted to each drilling rod and the ring-shaped collar body fixed to the drilling rod is guided. Since it is pressed against the rear end surface of the casing, when the boring rod is hit and rotated to excavate the groove hole, the groove is smoothly formed while the guide casing is integrally propelled by the ring-shaped collar body. be able to.

Moreover, as described in claim 3,
By configuring the connecting member with the short tubular portion fitted only to the tip end portion of each drilling rod and the connecting portion that connects the adjacent short tubular portions, when the slot is formed by the drilling rod,
The connecting member allows the connecting rod to be inserted into the slot deeply integrally with the tip of the opening rod by the ring-shaped collar body while keeping the connecting rod in a precise parallel state. Only the boring rod is inserted between the end and the open end of the excavated slot, and the space for discharging the dust in the slot becomes large, so that the dust can be discharged smoothly and easily. Is.

Furthermore, since the length of each short tubular portion of the connecting member is extremely short, even if the inside thereof is clogged, for example,
By performing operations such as moving the connecting member back and forth with respect to the piercing rod, the removal work of dust and the like can be performed more easily, and it is possible to perform efficient pitting work with almost no failure. To do. Further, since the respective short tubular portions of the connecting member are integrally connected by the connecting portion, the plurality of piercing rods can be dug in the length direction at regular intervals without being twisted with each other. Of course,
By making four piercing rods and rotating the adjacent piercing rods in opposite directions, it is possible to pierce the slot holes with high accuracy while canceling out the torques that tend to twist each other.

[Brief description of drawings]

1 is a simplified side view of a rock drilling machine of the present invention,

FIG. 2 is a simplified plan view thereof,

FIG. 3 is a plan view of perforated rods arranged in parallel,

FIG. 4 is a side view of a perforated rod in which a ring-shaped collar body is fixed to a small diameter portion,

FIG. 5 is a simplified vertical sectional side view showing a state of excavating a slot hole;

FIG. 6 is a vertical sectional front view,

FIG. 7 is a vertical sectional side view of a drilling rod portion in another drilling machine of the present invention;

FIG. 8 is a vertical cross-sectional side view of a drilling rod portion in another drilling machine of the present invention;

FIG. 9 is a simplified side view of a conventional rock drilling machine,

FIG. 10 is a simplified plan view thereof,

FIG. 11 is a plan view of the parallel piercing rod,

FIG. 12 is a vertical sectional side view thereof.

[Explanation of symbols]

 1 Drilling machine guide 2 Base plate 3 Drilling rod 3a Drilling bit 4 Connecting member 4a, 4b Short tube part 4c Connecting part 5 Ring-shaped collar body 6 Rotating device 7 Hitting device 8, 9 Bearing member

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Takuzo Makino 2-2-2 Matsuzaki-cho, Abeno-ku, Osaka City Okumura-gumi Co., Ltd. Stock company Okumura Gumi (72) Inventor Sadayuki Mitsunobu 2-6-2 Otemachi, Chiyoda-ku, Tokyo Inside Mitsubishi Steel Corporation Tokyo Works

Claims (5)

[Claims] 1. A drilling machine for drilling rock mass with a drilling rod having a drill bit attached to the tip thereof, characterized in that a ring-shaped collar body is fixed to the appropriate position of said drilling rod by shrink fitting. Machine. 2. A drilling machine for drilling rock mass by hitting and rotating a drilling rod, the drilling bit of which is attached to the tip of the drilling bit, wherein the drilling rod is relatively movable in the longitudinal direction of the rod and has a hole. A rock drilling machine, characterized in that a guide casing that is in sliding contact with a wall is fitted and a ring-shaped collar body that is pressed against the rear end surface of the guide casing is fixed by shrink fitting. 3. A drilling machine in which a plurality of drilling rods each having a drilling bit attached to the tip thereof are provided in parallel, and the drilling rods are driven to rotate to punch the rock, and the tip end of each drilling rod is slid. A connecting member in which short tubular portions freely inserted are arranged in parallel and adjacent short tubular portions are integrally connected by a connecting portion, and at least one piercing rod is fixed by shrink fitting to connect the connecting members. A rock drilling machine, comprising: a ring-shaped collar body that presses against a rear end surface. 4. The rock drilling machine according to claim 3, wherein the number of drilling rods is an even number. 5. The rock drilling machine according to claim 1, wherein the drilling rod portion having the ring-shaped collar body fixed by shrink fitting is formed in the small diameter portion.