JP4587863B2 - Drilling machine - Google Patents

Description

  The present invention relates to a drilling machine used for drilling work in the case of tunnel excavation in bedrock, dismantling of reinforced concrete structures, removal of residues from the blast furnace bottom, etc., in the repair of a blast furnace, etc. A piercing rod that is movably moved back and forth on the cell and has a piercing bit at the front end thereof, a rotating means for rotating the piercing rod, and the piercing rod is pushed forward so as to bite the piercing bit into the drilled object. And a drilling machine provided with the means.

  For example, a residue punching machine has already been put into practical use as a device for excavating residue from the bottom of a blast furnace when refurbishing a blast furnace. When drilling the residue using this type of drilling machine, the guide cell is fixed to the residue to be drilled while the drilling bit is pressed against the portion of the residue to be drilled to rotate the means. Rotating the piercing bit through the piercing rod at the same time, and at the same time, drilling by pressing the cutting edge of the piercing bit against the residue with the pressing means. The residue to be drilled contains a large amount of carbon components, and has intermediate properties between rock (hard but brittle) and iron (soft). Since a special bit with a negative rake angle (obtuse rather than sharp) is used, it is necessary to press the drilling rod and drilling bit strongly against the residue in order to perform rotary cutting. It is necessary to prevent the cell from moving backward due to a strong pressing reaction force and becoming unstable. Therefore, by adding a counterweight (weight) to the base machine equipped with the guide cell, the entire drilling machine including the guide cell and the base machine can be fixed on the grounding surface of the base machine so as to counter the pressing reaction force. Yes.

  In this case, since a considerable amount of counterweight is added, the base machine becomes heavier and hinders its mobility, and there is a limit to the space that can be used because the base machine becomes larger. In addition, a bending moment acts on the guide cell between the front end position of the guide cell and the position fixed to the base machine, and the guide cell itself may be deformed or damaged, which may hinder the drilling operation.

  In addition, in a drilling machine that uses both striking and rotating for excavating a tunnel, etc. in a rock mass, in order to drill a continuous hole (slot) with high accuracy, the guide cell must be securely fixed to the drilling object. is required. For this reason, in this type of drilling machine, the foot pad mounted on the guide cell is fixed by being pressed against a natural ground which is an object to be drilled. In the case of this method, the pressing force of the foot pad is weakened by hitting the drill during excavation, and the guide cell may be unstable.

  Also, when drilling in the reinforcing bar part of a reinforced concrete structure, it is best to use rotary cutting, as with the above-described drilling machine for residues and rocks, but drilling is performed on a hard and hard material such as a reinforcing bar part. Since this is performed, a considerable pressing force is required to prevent the cutting edge of the drill bit from escaping and to securely bite. Along with this, a large pressing reaction force is applied to the drilling machine. Along with this, an increase in weight and size of the apparatus cannot be avoided, and a bending force is applied to the guide cell. In particular, there is a limit to the support capacity of the working space and the installation position of the equipment, etc. for use in dismantling the basic concrete of the generator installation part in the existing hydroelectric power plant, such as the above-mentioned remnants and tunnels The drilling machine used for drilling is often difficult to use.

  There exists patent document 1 as a prior art relevant to the drilling machine of this invention. According to this, a rock drilling machine that drills holes by a striking force or a rotational force of a bit fixed to the tip of a rod, and a drill blade that can bite into the rock mass in parallel with the rod and parallel to the rod. And a motor for rotating the drill blade. According to this rock drill fixing device, the rock mass close to the drilling position is drilled with a low impact drill parallel to the bit, and this drill is used as an anchor to fix the tip of the rock drill. Therefore, the rock drill can be prevented from slipping and the rock drill can be firmly fixed to the rock mass.

  However, this rock drill fixing device requires a mechanism for rotating the anchor drill separately from the drive of the bit fixed to the tip of the rod, and the structure is complicated. Since time is required, it takes time and effort to fix the rock drill.

  Further, Patent Document 2 discloses a rotary punching device in which a fixing claw body is provided at the front end of the frame, and the solid claw body is pushed against a reinforced concrete surface that is a drilling object to fix the frame. .

Utility Model Registration No. 2566452 Japanese Patent Laid-Open No. 1-275009

  In the above-described conventional drilling machine, there is a problem that it is difficult to securely fix the guide cell against a strong pressing reaction force, and the guide cell becomes unstable. Moreover, in the fixing device of the rock drill described in Patent Document 1, there is a problem that the structure is complicated and time and labor are required for fixing the rock drill. Further, in the rotary punching device described in Patent Document 2, particularly when the drilling target is hard, such as a residue or a reinforcing bar, the frame is not sufficiently held and the pressing reaction force is received. Therefore, the above-described counterweight is unavoidable, and there is a problem as described above (described in [0005]).

  Therefore, in the present invention, the guide cell can be securely fixed even in a narrow place, the guide cell is prevented from becoming unstable, and time and labor are saved to fix the guide cell. It is an object of the present invention to provide a drilling machine that can be used.

In order to achieve the above object, according to the present invention, a guide cell, a piercing rod which is disposed on the guide cell so as to be movable back and forth and has a piercing bit at the front end, and means for rotating the piercing rod And a means for pressing the piercing rod forward to bite the piercing bit into the drilled object,
One end has a fixing portion that can be fixed to the front end portion of the guide cell, and the other end is provided with support means including an insertion portion that is inserted into a recess provided in the drilling object, and the insertion portion includes the recess. And a strain sensor that measures the pressure reaction force applied to the perforating rod is provided, and the pressure portion is driven when the measured strain value exceeds a predetermined value. Thus, a punching machine is provided which is configured to support the pressing reaction force.

In this case, with the generation of the pressing reaction force of the perforating rod, the pressing portion is configured to move to the peripheral wall side of the recess and press the peripheral wall.
In addition, the pressing portion is configured in a reverse wedge shape that acts to cause the pressing portion to bite into the peripheral wall side of the recess when the insertion portion acts in a direction in which the insertion portion comes out of the recess. And
Alternatively, the pressing portion is connected to the main body of the insertion portion by a link mechanism that acts to cause the pressing portion to bite into the peripheral wall side of the recess when the insertion portion acts in a direction in which the insertion portion comes out of the recess. It is characterized by being.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

  1 and 2 show a drilling machine according to a first embodiment of the present invention, FIG. 1 is a side view, and FIG. 2 is a cross-sectional view taken along lines AA and BB in FIG. 1 (b). It is.

  In FIG. 1, reference numeral 10 denotes a drilling object such as a rock mass, a residue, a natural ground, and the like. In the first embodiment, the surface 10 a is an inclined surface, but the drilling machine of the present invention is a drilling object. It should be noted that the surface 10a can be applied to such an inclined surface, a horizontal surface or a vertical surface.

The guide cell 12 extending in the longitudinal direction is fixed and held in a direction perpendicular to the surface 10a of the drilling object 10. That is, the guide cell 12 is arranged on the upper side of the holding frame 14 with the jack arranged in parallel with the guide cell 12, and the holding frame 14 with the jack along the guide portions 14a and 14b before and after the holding frame 14 with the jack. It is held so as to be slidable in parallel (arrow E). And the guide cell 12 moves in parallel with respect to the holding frame 14 with a jack, when the jack part 14c is driven and expands and contracts. On the other hand, by means not shown, an arm 18 is erected in the vertical direction so as to be rotatable at the front end portion of the fixed frame 16 held substantially horizontally, and a horizontal shaft 20 at the upper end of the arm 18 and a lower end portion of the arm 18. The rear end portion and the front end portion of the holding frame 14 with the jack are pivoted and held by the free end of the jack 23 extending from the jack 23 . Therefore, the guide cell 12 can be set at a desired angle position by the rotation of the arm 18 (arrow C) and the operation of the jack 23 (arrow D).

That is, when the jack 23 is driven to expand and contract, the holding frame 14 with the jack holding the guide cell 12 is rotated about the horizontal axis 20, and the holding frame 14 with the jack and the guide cell 12 are tilted at an arbitrary inclination angle. It can be set to.

  A wall surface pressing device 22 is attached to the lower side of the front end portion of the guide cell 12. A hydraulic wedge 22 a capable of exerting a pressing force on the wall surface is attached to the tip of the wall pressing device 22, and this hydraulic wedge 22 a is inserted into a recess 10 b drilled in advance at a right angle to the surface 10 a of the drilling object 10. Is done.

  On the upper side of the guide cell 12, a piercing rod 24 is arranged in parallel with the guide cell 12. The perforated rod 24 is guided by a guide portion 12a whose front end is fixed to the upper front end of the guide cell 12, and the rear end thereof is mounted on a moving table 28 installed in the guide cell 12 so as to be movable in the front-rear direction. It is attached to the drifter 30 installed in the.

  A piercing bit 26 is attached to the front end of the piercing rod 24. When the drifter 30 is driven, the piercing rod 24 and the piercing bit 26 rotate (arrow F). Further, inside the guide cell 12, a rotary shaft 32 made of a ball screw engaged with the moving table 12 is arranged in parallel with the perforated rod 24, and this rotary shaft 32 is provided at the rear end of the guide cell 12. It is rotated by a shaft rotation motor 34. Due to the rotation of the rotary shaft 32, the drifter 30 moves forward together with the moving table 28, and the drilling rod 24 and the drilling bit 26 move forward with respect to the drilling object 10 (arrow G).

  As the piercing rod 24 and the piercing bit 26 rotate as described above, the piercing bit 26 applies a pressing force (arrow G) to the piercing target object 10 by moving forward with respect to the piercing target object 10. Is going on.

  As indicated by the arrow H in FIG. 1, the guide cell 12 moves the drilling object 10 by the pressing reaction force of the drilling bit 26 against the drilling object 10 while the drilling bit 26 rotates and the drilling of the drilling object 10 proceeds. The guide cell 12 is unstably fixed by receiving a force in a direction away from the center. In order to prevent this, in the first embodiment of the present invention, the wall surface pressing device 22 is attached to the lower side of the front end portion of the guide cell 12 as described above. Then, as shown in FIG. 1 (b), the hydraulic wedge 22a of the wall surface pressing device 22 is driven to push the hydraulic wedge 22a into the recess 10b, and the directions on both sides indicated by the arrows J (see FIG. 1B) Apply outward pressure to arrow J). As shown in FIG. 2, this moving direction is a direction (J direction) perpendicular to the line connecting the central axis 26a of the drill bit 26 and the central axis 22c of the wall pressing device.

  Further, the hydraulic wedge 22a is configured in a reverse wedge shape so as to bite into the peripheral wall side toward the back side of the recess 10b of the drilling object 10. Thereby, even if the guide cell 12 receives a force in a direction away from the drilling object 10, that is, a pressing reaction force, the guide cell 12 can be stably held against the pressing reaction force sufficiently.

  In addition to the hydraulic wedge 22a, for example, a side jack (not shown) can be used as the wall surface pressing device 22 used for the same purpose. Also in such a side jack, the jack operating portion is formed on both sides in a direction perpendicular to a line connecting the central axis 26a of the drill bit 26 and the central axis 22c of the wall pressing device with respect to the wall surface of the recess 10b. To apply pressure.

  The pressing force applied to both sides in a direction perpendicular to the wall surface of the recess 10b is perforated to be applied to the guide cell 12 depending on the advance speed, rotational speed, hardness of the perforating object 10, etc. of the perforating bit 26. Needless to say, the adjustment can be made according to the pressing reaction force of the bit 26 against the drilling object 10.

  In addition, when the wall surface pressing device 22 is provided with a strain sensor (not shown) and the like and the punching bit 26 measures the pressing reaction force received from the drilling object 10, and the pressing reaction force is a predetermined value or less, the wall surface pressing device. When the reaction force exceeds a predetermined value, the wall surface pressing device 22 is moved outward in both directions to leave the wall surface of the recess 10b. Of course, it may be configured to apply a pressing force.

  FIG. 3 shows a drilling machine according to a second embodiment of the present invention.

  In the second embodiment, the case where the surface 10a of the piercing object 10 such as reinforced concrete is a vertical surface is shown, but the surface 10a may be an inclined surface as in the first embodiment. It is also applicable to a horizontal plane. In addition, 10d shows the reinforcing bar part inside concrete.

  In the punching machine according to the second embodiment, only parts different from the first embodiment will be described. As a means for supporting the pressing reaction force of the punching bit 26 against the drilling target object 10, in the first embodiment, the drilling target object 10 is used. Although the reverse wedge-shaped pressing means that acts on the wall surface of the recess 10b is provided, in the second embodiment, as a device that supports the pressing reaction force on the lower side of the front end portion of the guide cell 12, the drilling object 10 is provided. A pressing reaction force supporting device having a link mechanism that can be inserted into the hole provided in is provided.

  That is, the movable table 40 is attached to the lower side of the front end portion of the guide cell 12 so as to be movable in the front-rear direction in parallel with the drilling rod 24, and the jack 42 attached to the lower side of the guide cell 12 is driven behind the movable table 40. By extending and contracting, the movable base 40 can be slid in the front-rear direction with respect to the guide cell 12. A penetrating member 46 extending forward in parallel with the piercing rod 24 can be inserted into the moving table 40 in a hole 10 c that is opened in a direction perpendicular to the surface 10 a of the piercing object 10.

  In this second embodiment, as shown by the arrow H in FIG. 3, the guide force 26 is rotated by the reaction force against the pressing force (G) of the drilling bit 26 while the drilling bit 26 rotates and drilling of the drilling object 10 proceeds. The cell 12 receives a force in a direction away from the drilling target 10, and the guide cell 12 is unstably fixed. In order to prevent this, the jack 42 attached to the lower side of the guide cell 12 is driven to expand and contract to move the movable table 40 forward. Along with this, the penetrating member 46 also moves forward.

  One hole 10c is made in advance in a position corresponding to the penetrating member 46 on the surface 10a of the drilling object 10, and the penetrating member 46 is advanced to be inserted into the hole 10c. Then, by expanding the hydraulic link 46b, the pressing member 46a bites into the side wall surface of the hole 10c, and the guide cell 12 is stably held by the frictional force between the pressing member 46a and the side wall surface of the hole 10c. When the penetration member 46 receives a force in the direction in which the penetrating member 46 comes out of the hole 10c due to the pressing reaction force by the punch bit 26, the pressing member 46a acts to bite into the peripheral wall side of the hole 10c by the hydraulic link 46b. Further, if necessary, a force can be applied in the direction in which the jack 42 is contracted to counter the pressing reaction force of the drill bit 26.

Also in the second embodiment, for example, when the penetration member 46 is provided with a strain sensor (not shown) or the like, the pressing reaction force of the drill bit 26 is measured, and the reaction force is equal to or less than the first predetermined value, When the penetrating member 46 is only inserted into the hole 10c of the drilling object 10 and the reaction force exceeds the first predetermined value, the penetrating member 46 is inserted into the hole 10c of the drilling object 10 and the hydraulic link 46b is inserted. Further, when the second predetermined value is exceeded, a force is applied in the direction in which the jack 42 is contracted to increase the force against the pressing reaction force of the drill bit 26 via the pressing member 46a. You may comprise.

  As mentioned above, although embodiment of this invention was described with reference to the accompanying drawing, this invention is not limited to said embodiment, Various forms, a deformation | transformation, correction, etc. are within the spirit thru | or scope of this invention. Is possible.

  As described above, according to the present invention, in the case where the drilling machine is fixed to the drilling target, the means for efficiently suppressing the reaction force due to the pressing force of the drilling bit against the drilling target is provided. Even if the object to be drilled is a hard bedrock or a reinforced concrete rebar, etc., it can be stably held without being affected by the reaction force of the punching bit. it can.

1 is a side view of a drilling machine according to a first embodiment of the present invention. It is AA sectional drawing (a) of the drilling machine of FIG. 1, and BB sectional drawing (b) of a recess. It is a side view of the drilling machine which concerns on 2nd Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Drilling target object 10a Surface of drilling target object 10b Recess 10c Hole 12 Guide cell 22 Insertion part (support means)
22a Hydraulic wedge 24 Drilling rod 26 Drilling bit 30 Drifter 32 Rotating shaft 34 Shaft rotating motor 40 Moving table 46 Penetration member (insertion body)
46a Pressing member (pressing part)
46b Hydraulic link

Claims (4)

A guide cell, a piercing rod which is movably disposed back and forth on the guide cell and has a piercing bit at a front end thereof, a rotating means for the piercing rod, and the piercing bit so as to bite the piercing bit into an object to be drilled A means for pressing the rod forward,
One end has a fixing portion that can be fixed to the front end portion of the guide cell, and the other end is provided with support means including an insertion portion that is inserted into a recess provided in the drilling object, and the insertion portion includes the recess. And a strain sensor that measures the pressure reaction force applied to the perforating rod is provided, and the pressure portion is driven when the measured strain value exceeds a predetermined value. The punching machine is configured to support the pressing reaction force. The measurement value of the strain by the strain sensor exceeds a predetermined value, and the pressing portion is configured to move to the peripheral wall side of the recess and press the peripheral wall. Drilling machine. The pressing portion acts to cause the pressing portion to bite into the peripheral wall side of the recess when the measured value of the strain by the strain sensor exceeds a predetermined value and the insertion portion acts in a direction of coming out of the recess. The punching machine according to claim 1, wherein the drilling machine is configured in a reverse wedge shape. The pressing portion acts to cause the pressing portion to bite into the peripheral wall side of the recess when the measured value of the strain by the strain sensor exceeds a predetermined value and the insertion portion acts in a direction of coming out of the recess. The punching machine according to claim 1, wherein the punching machine is connected to a main body of the insertion portion by a link mechanism.

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