JP7664752B2 - Vertical cutting hole consecutive drilling device and vertical cutting hole consecutive drilling method - Google Patents

Description

The present invention relates to a vertical cut hole continuous drilling device and a vertical cut hole continuous drilling method, and in particular to a vertical cut hole continuous drilling device for forming multiple vertical cut holes by connecting them together in a solid material, and a vertical cut hole continuous drilling method using the vertical cut hole continuous drilling device.

For example, in steelworks, pig iron left at the bottom of a blast furnace may need to be removed during renovation work, or pig iron that has been temporarily discharged into a pit outside the furnace while the equipment is in operation may need to be removed. This pig iron is removed in a solid state, but because of its high specific gravity, it is broken down into smaller pieces so that they can be transported easily.

Various methods have been developed for dismantling pig iron that has been left behind as a solid substance. For example, in the pig iron dismantling method described in Patent Document 1, blasting holes are drilled in the pig iron, which is a solid substance left at the bottom of a blast furnace, and the pig iron is broken down into small pieces by blasting. However, this method has issues such as the need to suspend construction and operations in the surrounding area and evacuate as a countermeasure against noise and impact during blasting, and the possibility of damage to equipment such as blast furnaces.

As a safer method, for example, Patent Document 2 proposes cutting the residual pig iron with a wire saw to separate it into smaller pieces, which are then transported outside the furnace. However, this method has many limitations, as it requires a lot of work to install the wire saw on the outer periphery of the cut surface of the residual pig iron, and it is difficult to arrange multiple wire saws in an intersecting manner.

In response to this, for example, Patent Document 3 proposes a method (line cut method) of cutting the pig iron linearly by using a device for drilling blast holes and a drill bit to form a through groove with multiple vertical cut holes that reach the bottom of the pig iron in a state where they are connected along a predetermined cutting line.Furthermore, for example, Patent Document 4 proposes using a core bit drill bit that drills only the circumferential portion of the vertical cut holes in this type of line cut method, instead of a drill-type drill bit that drills each vertical cut hole on the entire cross section.

JP 2000-256717 A JP 2011-153327 A JP 2012-162787 A JP 2020-2386 A

However, according to a conventional device for forming vertical cut holes, which is preferably used in the above-mentioned line cut method, for example in mountain tunnel construction, a vertical cut hole is formed using a device with a drill bit for mainly drilling blast holes in the rock in the horizontal direction. Therefore, when drilling a vertical cut hole in a solid material that is left as a hardened floor body at the bottom of a blast furnace, for example, formed from a pig iron lump, which is harder and stronger than rock, the heavy equipment equipped with the drilling device cannot stably support the large load applied during drilling by the contact part of the surrounding hardened floor body by the moving mechanism such as a crawler, and the heavy equipment is prone to become unstable, making it difficult to form a vertical cut hole with high precision.

In response to this, for example, according to Patent Document 4, in a drilling machine, which is a drilling device mounted on a heavy machine (crawler), a pressing member and a shaft body equipped with a fixing means to be inserted into a previously formed vertical through hole are provided on the heavy machine side and the opposite side of the drill bit, and these are pressed against the hardened floor body to stabilize the drilling operation by the drilling device. However, even when these means are used, it is time-consuming to accurately form vertical through holes in the hard hardened floor body, and each time a vertical cut hole is formed, it is necessary to reset the heavy machine (crawler) while drilling. As a result of the time required for movement and installation, it is difficult to efficiently form multiple vertical cut holes, preferably in a linear line.

For this reason, there is a need for a new drilling device that can drill holes vertically into solid materials, such as hard materials, and that can form multiple vertical holes, preferably connected in a straight line, in a stable manner with high accuracy and efficiency.

The object of the present invention is to provide a drilling device and a drilling method for drilling vertically connected cut holes that can form multiple vertically connected cut holes, preferably in a straight line, in a stable manner, with high accuracy and efficiency, even in solid substances made of hard materials.

The present invention is a vertical cutting hole connecting drilling device for forming a plurality of connected vertical cutting holes to be drilled in a solid material, comprising a base section that can move over the solid material via a moving mechanism, outrigger sections provided at the four corners of the base section, a slide boom section that is supported by the base section and moves back and forth along the upper surface of the base section, a slide rail section provided on the base section that guides the forward and backward movement of the slide boom section, and a drilling device main body attached to the tip of the slide boom section, and the slide rail section is provided to move the base section of the slide boom section inside the rectangular area surrounded by the outrigger sections on the base section, The slide boom section includes a base section that is slidably placed on the slide rail section, and a boom main body section that stands upright from the base section as a continuous member without the interposition of a rotary connection section or an expandable section, and is bent to the side via a bending section, so that the tip connection section to which the drilling device main body is connected is positioned outside the area directly above the base section. The drilling device main body is connected to the tip connection section of the boom main body section so that when the drilling rod of the drilling device main body is erected vertically, the lower end drilling bit is positioned outside the rectangular area surrounded by the outrigger section. This objective has been achieved by providing a vertical cutting hole continuous drilling device.

The vertical cut hole continuous drilling device of the present invention preferably has the drilling device body rotatably connected to the tip connector of the boom body in the elevation direction, and the drilling rod can be switched from a tilted state to a vertically erected state by driving a telescopic jack that connects the part of the drilling device body above the tip connector and the part of the boom body below the tip connector.

The vertical cut hole continuous drilling device of the present invention is preferably equipped with a slide fixing mechanism that slides the slide boom section in the forward and backward directions along the base section so as to be fixed at a predetermined position, and the slide fixing mechanism is preferably configured to include the slide rail section that is provided on the base section and has a slide surface extending in the forward and backward directions, a slide plate surface section that is provided on the base section of the slide boom section and slides the slide boom section along the slide rail section while being in slidable surface contact with the slide surface, and a stopper section that can fix the slide boom section to a predetermined position on the slide rail section by pressing a pressing section that is provided so as to be protruding from the base section of the slide boom section toward the slide rail section against the slide rail section, thereby pressing the slide boom section against the slide rail section.

Furthermore, in the vertical cut hole continuous drilling device of the present invention, it is preferable that the sliding plate surface portion provided on the base plate portion of the slide boom portion is formed by attaching a sliding plate member using a plate-shaped self-lubricating bearing to the support surface of a support portion that is placed on the slide rail portion.

Furthermore, it is preferable that the stopper portion of the vertical cut hole continuous drilling device of the present invention is configured to include a hydraulic cylinder fixed to the base plate portion of the slide boom portion, and the pressing portion is provided so as to be protrudible from the base plate portion toward the slide rail portion by the operation of the hydraulic cylinder while being inserted into an advance/retreat through hole formed through the base plate portion.

In addition, in the vertical cut hole continuous drilling device of the present invention, it is preferable that the slide rail portion extends in the forward and backward directions, is arranged in parallel as a pair, and is fixed to the upper surface of the base portion.

Furthermore, it is preferable that the vertical cut hole continuous drilling device of the present invention is provided with a forward/backward movement mechanism for moving the slide boom section in the forward/backward direction in the area between a pair of the parallel-arranged slide rail sections.

Furthermore, in the vertical cut hole continuous drilling device of the present invention, the forward/backward movement mechanism is preferably configured to include a rack member that is attached to the center of the width direction in the area between the pair of slide rail parts on the upper surface of the base part and extends in the forward/backward direction, and a pinion member that is attached to a hydraulic motor fixed to the base plate part of the slide boom part and is positioned to protrude below the base plate part.

In addition, in the vertical cut hole continuous drilling device of the present invention, the movement mechanism is a traveling device using a pair of endless tracks arranged on both sides of the base part, and it is preferable that the slide rail part is arranged to extend parallel to the endless tracks of the traveling device.

Furthermore, in the vertical cut hole continuous drilling device of the present invention, it is preferable that the drill bit attached to the lower end of the drill rod is a drill bit using a core bit that cuts the circumferential portion of the vertical cut hole.

Furthermore, in the vertical cutting hole continuous drilling device of the present invention, it is preferable that the solid material is made of residual pig iron discharged from a blast furnace in a steelworks.

The present invention also provides a method for drilling consecutive vertical cut holes using the above-mentioned device for drilling consecutive vertical cut holes, which includes a first step of moving the device for drilling consecutive vertical cut holes to a predetermined position above the solid material by the moving mechanism, a second step of extending the outrigger part toward the solid material and grounding it on the solid material to fix the device for drilling consecutive vertical cut holes above the solid material, and a third step of moving the slide boom part toward the front end or rear end of the slide rail part while forming consecutive vertical cut holes in the solid material using the drilling device body, thereby achieving the above-mentioned object.

The vertical cut hole consecutive drilling method of the present invention is preferably configured to execute the following steps in the third step: a fourth step of moving the slide boom section to the position of the tip of the slide rail section and moving the drilling device main body to a predetermined position above the solid material; a fifth step of drilling a vertical cut hole in the solid material using the drilling device main body; a sixth step of moving the slide boom section toward the rear end side of the slide rail section a distance corresponding to the diameter of the vertical cut hole that has been drilled, and positioning the drilling device main body so that the next vertical cut hole is connected to the vertical cut hole that has been drilled; and a seventh step of drilling the next vertical cut hole in the solid material using the drilling device main body.

In addition, the method for drilling consecutive vertical cut holes of the present invention preferably includes, in the third step, an eighth step of drilling a vertical cut hole in the solid material by the drilling device main body, a ninth step of moving the slide boom section toward the tip end side of the slide rail section a distance corresponding to the diameter of the vertical cut hole that has been drilled, and positioning the drilling device main body so that the next vertical cut hole is connected to the previously drilled vertical cut hole, and a tenth step of drilling the next vertical cut hole in the solid material by the drilling device main body.

In addition, in the method for drilling consecutive vertical cut holes of the present invention, the drilling device body is further connected to the slide boom section so that it can rotate in an elevation direction and tilt back and forth, and a step of adjusting the rotation and tilt of the drilling device body so that the drilling device body can drill vertically into the solid material is preferably performed after the fourth step or the ninth step. It is preferable that the drilling device body is connected to the slide boom section so that it can rotate in an elevation direction and tilt back and forth, and a step of adjusting the rotation and tilt of the drilling device body so that the drilling device body can drill vertically into the solid material is performed after the fourth step or the ninth step.

In addition, in the method for drilling consecutive vertical cut holes of the present invention, the drilling device body further includes a drill bit for cutting the solid material, and the drill bit cuts the circumferential portion of the vertical cut hole to be drilled in the solid material, and in the fourth or eighth step, after the vertical cut hole is formed, it is preferable that the residual iron constituting the solid material that is cut by the drill bit and left in the drill bit is removed from the drill bit.

Furthermore, it is preferable that the method for drilling consecutive vertical cut holes of the present invention repeats steps 5 to 7 or steps 8 to 10 a number of times determined according to the overall length of the slide rail section and the diameter of the vertical cut holes.

The vertical cut hole drilling device or method of the present invention allows multiple vertical cut holes to be formed in a stable, accurate and efficient manner, preferably in a linear fashion, in a solid substance made of a hard material.

1 is a side view illustrating a vertical cut hole continuous drilling device according to a preferred embodiment of the present invention. FIG. 1 is a plan view illustrating a vertical cut hole continuous drilling device according to a preferred embodiment of the present invention; 1 is a schematic cross-sectional view illustrating a construction situation using a vertical cut hole continuous drilling device according to a preferred embodiment of the present invention. FIG. 1A is a simplified side view of the slide boom section, slide rail section, and mounting support section of a vertical cut hole continuous drilling device, and FIG. 1B is a simplified rear view of (a) as seen from the right side. 1A is a schematic side view of the slide boom section and the slide rail section of a vertical cut hole continuous drilling device, and FIG. 1B is a schematic plan view of (a) as viewed from above. 5A is a cross-sectional view taken along line AA in FIG. 5A, and FIG. 5B is an enlarged view of part B in FIG. 1A to 1E are diagrams illustrating an example of a method for drilling consecutive vertical cut holes using a device for drilling consecutive vertical cut holes.

1 and 2, the vertical cut hole series drilling device 10 according to a preferred embodiment of the present invention is used in a line cut construction method for cutting a lump of residual pig iron left as a solid floor hardened body 51 by pig iron remaining at the bottom of a blast furnace 50 in a linear manner, as shown in FIG. 3, in a steelworks, for example, by a line cut construction method for forming a through groove 53 by a plurality of vertical cut holes 52 connected along a predetermined cutting line. That is, the vertical cut hole series drilling device 10 of this embodiment is used as a drilling device specialized for drilling holes perpendicular to the surface of a solid floor hardened body 51, for example, to form a plurality of vertical cut holes 52 constituting a through groove 53 by connecting them preferably linearly in the floor hardened body 51, which is a hard solid material having considerable strength. The vertical cutting hole series drilling device 10 of this embodiment has the function of penetrating multiple vertical cutting holes 52, preferably as through holes, vertically through the residual iron forming the hard floor hardened body 51, and connecting them in a straight line to form them in a stable, accurate and efficient state.

The vertical cut hole continuous drilling device 10 of this embodiment is a drilling device for forming a plurality of vertical cut holes 52, which are drilled in a bed hardened body 51 made of residual iron, in a linear manner, and as shown in Figures 1 and 2, includes a base part 11 that can move over the bed hardened body 51 via a moving mechanism 40, outrigger parts 12 provided at the four corners of the base part 11, a slide boom part 13 that is supported by the base part 11 and moves forward and backward along the upper surface of the base part 11, a slide rail part 16 installed on the base part 11 to guide the forward and backward movement of the slide boom part 13, and a drilling device main body 30 attached to the tip of the slide boom part 13. The slide rail part 16 is provided so as to move the base part 14 of the slide boom part 13 inside the rectangular region R surrounded by the outrigger part 12 on the base part 11. The slide boom section 13 is configured to include a base section 14 that is slidably placed on the slide rail section 16, and a boom body section 15 that is erected from the base section 14 as a continuous member without any intervening rotary connection section or telescopic section, and is preferably bent laterally via a curved bend section 15a, so that the tip connection section 15b to which the drilling device body 30 is connected is located outside the area directly above the base section 14. The drilling device body 30 is connected to the tip connection section 15b of the boom body section 15 so that when the drilling rod 31 is erected vertically, the drilling bit 31a at the lower end is located outside the rectangular area R surrounded by the outrigger section 12.

In addition, in this embodiment, the drilling device body 30 is connected to the tip connector 15b of the boom body 15 of the slide boom section 13 so as to be rotatable in the elevation direction, preferably via an attachment support section 44 that supports the drilling device body 30 so that it can move up and down and swing. By driving the telescopic jack 17 that connects the upper part of the attachment support section 44 constituting the drilling device body 30 above the tip connector 15b and the lower part of the boom body 15 below the tip connector 15b, the drilling rod 31 of the drilling device body 30 can be switched from a tilted state to a vertically erected state.

Furthermore, in this embodiment, the vertical cutting hole series drilling device 10 is equipped with a slide fixing mechanism 25 that slides the slide boom section 13 in the forward and backward direction X along the base section 11 so that it can be fixed at a predetermined position. The slide fixing mechanism 25 is a mechanism for sliding the slide boom section 13, which has the drilling device body 30 attached to its tip, in the forward and backward direction X along the base section 11 that can move on the floor hardened body 51 via the moving mechanism 40 in the vertical cut hole continuous drilling device 10, so that it can be fixed to a predetermined position. It is composed of a slide rail section 16 equipped with a slide surface 16e (see Figures 6 (a) and (b)) extending in the forward and backward direction X, which is installed on the base section 11, a slide plate surface section 14c provided on the base section 14 of the slide boom section 13, which slides the slide boom section 13 along the slide rail section 16 in a state of slidable surface contact with the slide surface 16e, and a stopper section 18 that can fix the slide boom section 13 to a predetermined position on the slide rail section 16 by pressing a pressing section 18b provided to be protruding from the base section 14 of the slide boom section 13 toward the slide rail section 16 against the slide rail section 16 by a contact friction force.

In this embodiment, the moving mechanism 40 that moves the vertical cut hole series drilling device 10 along the top surface of the bed hardened body 51 (see FIG. 3) made of residual iron is a known crawler-type running device 41 equipped with a pair of endless tracks arranged on both sides of the base part 11 (see FIG. 1). By providing the moving mechanism 40, the base part 11 equipped with the slide boom part 13 and the slide rail part 16 can be moved together with the drilling device main body 30 on the cutting line of the through groove 53 of the vertical cut hole 52 in the bed hardened body 51 without the outrigger part 12 touching the ground.

The base 11 is formed by assembling various steel materials, preferably having a generally vertically elongated rectangular planar shape as a whole, and is fixed integrally to a support base (not shown) provided between a pair of crawler-type running devices 41 so as to connect them. This allows the base 11 to be located directly above the moving mechanism 40, and to move on the floor hardened body 51 as the moving mechanism 40 moves, for example, when an operator in the cab 42 (see FIG. 1) operates the moving mechanism 40. The base 11 is provided with various known required facilities and equipment, such as the slide boom section 13 and slide rail section 16 described below, as well as the cab 42, control panel 43, electric motor, and fuel tank. Outrigger sections 12 that can be extended and retracted in the vertical direction are attached to the four corners of the generally vertically elongated rectangular planar shape of the base 11.

The outrigger section 12 is configured with a known telescopic mechanism having a cylinder section 12a, a piston rod section 12b, and a grounding plate section 12c, and can be extended and retracted by sliding the piston rod section 12b against the cylinder section 12a fixed to the base section 11, for example, by the action of hydraulic pressure, so that the grounding plate section 12c attached to the lower end of the piston rod section 12b can be pressed against the upper surface of the hardened floor body 51 to obtain supporting force from the hardened floor body 51, or can be moved away from the hardened floor body 51 to make the drilling device 10 movable via the moving mechanism 40. By grounding the outrigger parts 12 provided at the four corners of the base part 11 to the floor hardened body 51 to support the weight of the drilling device 10, when drilling a vertical cutting hole 52 using the drilling rod 31 of the drilling device main body 30, the load from the drilling device main body 30 during drilling, which is transmitted via the slide boom part 13 and the slide fixing mechanism 25, can be stably supported by the weight of the drilling device 10.

The slide boom section 13, which moves back and forth along the top surface of the base section 11, is composed of the base section 14 and the boom main body section 15, as described above. As shown in Figures 4(a), (b) and 5(a), (b), the base section 14 is the section that serves as the slide base when the slide boom section 13 moves back and forth in the forward and backward direction X, and the boom main body section 15 is the section that transmits the vertical load applied from the tip connecting section 15b via the mounting support section 44 during drilling by the drilling device main body 30 to the base section 14 in a stable state and supports it.

In this embodiment, the boom body 15 of the slide boom section 13 is composed of a pair of curved support plates 15c symmetrically arranged on both sides of the widthwise centerline C of the base plate 14, and a connecting box section 15d arranged in the space between them to integrally connect the pair of curved support plates 15c. The curved support plate 15c is made of a steel plate, for example, about 40 to 50 mm thick, and its entirety is bent to the side (forward in the forward/backward direction X) as a curved bent section 15a, so that the tip connecting section 15b to which the drilling device body 30 is connected is positioned outside the area directly above the base plate 14.

That is, each curved support plate 15c has a curved side shape that is surrounded by a linear base portion joined to the base plate portion 14, an outer peripheral portion having a substantially quarter-circular arc shape, an inner peripheral portion having a smaller radius of curvature than the outer peripheral portion, and a semicircular tip edge portion at the lateral tip portion, and the width in the direction perpendicular to the curved direction smoothly and gradually narrows from the base plate portion 14 toward the tip connecting portion 15b.

The connecting box section 15d is made of a steel plate having a thickness of, for example, about 40 to 50 mm, similar to that of the curved support plate 15c, and is processed to have a curved hollow three-dimensional shape consisting of an outer peripheral surface portion curved with a radius of curvature slightly smaller than that of the outer peripheral portion of the curved support plate 15c, an inner peripheral surface portion curved with a radius of curvature slightly larger than that of the inner peripheral portion of the curved support plate 15c, and a vertical end surface portion extending vertically in front of the semicircular tip edge of the curved support plate 15c and connecting the outer peripheral surface portion and the inner peripheral surface portion. The connecting box section 15d is attached to the curved support plates 15c by joining the side end surfaces on both sides to the inner surfaces of the pair of curved support plates 15c by welding or the like, with the outer peripheral surface portion aligned along the outer peripheral portion of the curved support plate 15c and the inner peripheral surface portion aligned along the inner peripheral portion of the curved support plate 15c, thereby firmly connecting the curved support plates 15c as one unit and forming a hollow box shape in the portion between them.

As a result, the boom main body 15 stands as a continuous single member from the base plate 14, which is slidably placed on the slide rail 16, without any intervening rotary connection or extension section, and is preferably bent laterally via the bent section 15a that runs throughout its length, so that the tip connection section 15b, to which the drilling device main body 30 is connected via the mounting support section 44 (described later), is positioned outside the area directly above the base plate 14.

In addition, a rotary connection pin member 15e is attached to the tip connection portion 15b of the boom body 15, which is installed between the curved support plates 15c on both sides in the portion closer to the tip than the vertical end surface of the connection box portion 15d, and connects the mounting support portion 44 of the drilling device body 30 described later in a rotatable manner in the elevation direction. A jack connection pin member 15f is installed between the curved support plates 15c on both sides in the lower portion of the boom body 15, which is lower than the tip connection portion 15b, and connects one end of the telescopic jack 17. The jack connection pin member 15f penetrates the hollow interior of the connection box portion 15d and is installed with both ends protruding outside the respective curved support plates 15c.

Furthermore, in this embodiment, a steel pipe member 15g with a circular hollow cross section is installed between the curved support plates 15c on both sides in the vertical middle part of the boom main body 15, penetrating the hollow interior of the connecting box part 15d and attached with both ends open to each curved support plate 15c. By installing the steel pipe member 15g between the curved support plates 15c of the boom main body 15 and attaching it, the steel pipe member 15g functions as a reinforcing rib for the left and right curved support plates 15c, making it possible to effectively prevent the boom main body 15 from easily being twisted by a large unbalanced load.

The base plate 14 of the slide boom section 13 is made of a steel plate with a thickness of, for example, about 40 to 50 mm, and has a rectangular planar shape with a length in the forward/backward direction X of about 800 to 900 mm and a length in the width direction Y perpendicular to the forward/backward direction X of about 1200 to 1300 mm. The curved support plate 15c described above is integrally joined to the upper surface of the base plate 14 via welding or the like, and the side edge portions on both sides in the width direction Y are bent into a key shape to have a U-shaped cross section, so that the slide plate surface portion 14c has a rail engagement placement portion 14a on which the slide rail portion 16 is placed while the pair of slide rail portions 16 are engaged with each other by embracing them from the outside (see Figures 4(b) and 6(a)).

On the inner surface of the rail engagement mounting portion 14a, a sliding plate member 14b, which is a known sliding bearing, for example a plate-shaped self-lubricating bearing under the product name "Oiles Bearing" (manufactured by Oiles Corporation), is attached integrally to three surfaces, the top surface 14c, which serves as the mounting surface, the side surface, and the bottom surface, via connecting metal fittings (see FIG. 6(a)). The top surface, which serves as the mounting surface of the rail engagement mounting portion 14a, forms the sliding plate surface portion 14c. The sliding plate surface portion 14c of the top surface portion is in slidable surface contact with the slide surface 16e of the slide rail portion 16, and slides the slide boom portion 13 along the slide rail portion 16. The base plate section 14 is placed on the slide rail section 16 using the top surface, which is the slide plate surface section 14c to which the slide plate member 14b is attached, as the support surface. This allows the slide boom section 13 to smoothly slide along the slide rail section 16 while transmitting the load applied during drilling in a stable state to the slide rail section 16 and the base section 11 to which it is attached, through surface contact with the slide rail section 16.

As shown in Figs. 5(a), (b) and 6(a), (b), a stopper portion 18 is provided adjacent to the rail locking placement portion 14a on both side edge portions of the base plate portion 14 of the slide boom portion 13 at one location each. The stopper portion 18 includes a hydraulic cylinder 18a fixed to the base plate portion 14 and a stopper pin 18b as a pressing portion that is inserted into an advance/retract through hole 18c formed by penetrating the base plate portion 14 directly below the hydraulic cylinder 18a and is capable of moving forward and backward in the vertical direction by the operation of the hydraulic cylinder 18a to protrude from the base plate portion 14 toward the slide rail portion 16. The stopper portion 18 moves the stopper pin 18b downward to press the upper surface of the slide rail portion 16, and by the contact frictional force, the slide boom portion 13 that has been slid along the slide rail portion 16 to a predetermined position is stopped and fixed, and firmly held in the predetermined position. In addition, by moving the stopper pin 18b upward and releasing the pressure on the upper surface of the slide rail section 16, the slide boom section 13 can be made to slide along the slide rail section 16.

Furthermore, in this embodiment, as shown in Figs. 4(a) and (b), a pair of hydraulic motors 19 are disposed between a pair of curved support plates 15c at the rear of the base plate 14 of the slide boom section 13 in the forward/backward direction X, and are symmetrically positioned on both sides of the widthwise center line C of the base plate 14. A pinion member 19a protruding downward from the base plate 14 is attached to each hydraulic motor 19. The pair of pinion members 19a attached to each hydraulic motor 19 are engaged with racks 20a on both sides of a rack member 20 (see Figs. 4(b) and 5(b)) that is fixed to the center of the width direction Y of the upper surface of the base 11 and extends in the forward/backward direction X, so that the slide boom section 13, which is composed of the base plate 14 and the boom body 15 integrated therewith, can be pushed out or pulled in in the forward/backward direction X as the hydraulic motor 19 rotates, and can be moved forward and backward along the slide rail section 16.

That is, in this embodiment, an advance/retract movement mechanism 22 that moves the slide boom section 13 in the advance/retract direction X is provided in the area between a pair of parallel slide rail sections 16, and the advance/retract movement mechanism 22 is configured to include a rack member 20 that is attached to the center of the width of the area between the pair of slide rail sections 16 on the upper surface of the base section 11 and extends in the advance/retract direction X, and a pinion member 19a that is attached to a hydraulic motor 19 fixed to the base section 14 of the slide boom section 13 and is positioned to protrude below the base section 14.

In this embodiment, the slide rail section 16 that guides the forward and backward movement of the slide boom section 13 is made of a steel member having an L-shaped cross section (see FIG. 6(a)), as shown in FIG. 5(a), (b) and FIG. 6(a), (b), and is fixed on both sides of the rack member 20 fixed to the center of the width direction Y on the upper surface of the base section 11, arranged parallel to the rack member 20 and extending in the forward and backward direction X (see FIG. 5(b)). The pair of slide rail sections 16 are firmly fixed in a state in which the other side section 16b arranged above protrudes outward from the one side section 16a by abutting the tip of one side section 16a of the L-shaped cross section against the upper surface of the base section 11 (see FIG. 6(a)) and joining the pair of slide rail sections 16 to the base section 11 by welding or the like.

The rail locking placement portion 14a of the base plate portion 14 of the slide boom portion 13 described above is engaged with the other side portion 16b that protrudes outward from one side portion 16a of the slide rail portion 16, so as to embrace the other side portion 16b from the outside, in a state in which the sliding plate member 14b arranged on the inner surface of the rail locking placement portion 14a can be brought into close contact with the outer circumferential surface. A liner plate 16c is fixed to the upper surface of the other side portion 16b directly above the one side portion 16a, extending along the forward/reverse direction X (see Figures 5(b) and 6(b)). By bringing the lower surface of the stopper pin 18b of the stopper portion 18 into close contact with the upper surface of the liner plate 16c, when the stopper pin 18b presses the upper surface of the slide rail portion 16 to fix the slide boom portion 13 in a predetermined position, the strong adhesion frictional force between them makes it possible to more stably maintain the fixed state of the slide boom portion 13.

In addition, in this embodiment, a reinforcing rib plate 16d in the shape of a right triangle is fixed between the outer surface of one side portion 16a of each slide rail portion 16 and the upper surface of the base portion 11 at multiple locations at a predetermined interval in the forward/backward direction X, for example by welding the oblique sides on both sides to these outer surfaces or upper surfaces (see Figures 4(b) and 6(a)). This reinforces the joint state of the slide rail portion 16 to the base portion 11 and improves the fixing strength.

In this embodiment, the pair of slide rail sections 16 are preferably extended parallel to the endless tracks of the crawler-type traveling device 41 using a pair of endless tracks, and are arranged and laid in the area between the driver's cab 42 and the pair of front outrigger sections 12 in the base section 11 (see Figures 1 and 2). This makes it possible for the slide rail section 16 to move the base section 14 of the slide boom section 13 inside the rectangular area R surrounded by the four outrigger sections 12 in the base section 11. This also makes it possible for the drilling device main body 30 connected to the tip connection section 15b of the curved boom main body section 15 of the slide boom section 13 to be moved in the forward and backward direction X while maintaining a state in which the drilling bit 31a at the lower end is positioned outside the rectangular area R surrounded by the four outrigger sections 12 when the drilling rod 31 of the drilling device main body 30 is vertically erected.

In this embodiment, the drilling device body 30 attached to the tip of the slide boom section 13 can be a known drilling device having a configuration similar to that of a drilling machine used in the blast furnace pig iron cutting method described in JP 2020-2386 A, for example. As shown in FIG. 1 and FIG. 2, the drilling device body 30 includes a vertical base section 32, a rotary drive section 33 mounted on the vertical base section 32 so as to be movable in the vertical direction, a moving mechanism 34 provided on the vertical base section 32 and moving the rotary drive section 33 up and down toward the bed hardened body 51, which is a solid substance made of residual pig iron, and a drilling rod 31 detachably attached to the rotary drive section 33 and extending downward, and having a drilling bit 31a attached to its lower end.

The drilling device main body 30 rotates the drilling bit 31a via the drilling rod 31 by the driving force of the rotary drive unit 33, while lowering the rotary drive unit 33 by the moving mechanism 34, so that the vertical cutting hole 52 can be drilled and formed in the bed hardened body 51 made of residual pig iron (see FIG. 3). In this embodiment, the drilling bit 31a attached to the lower end of the drilling rod 31 is preferably a core bit drilling the circumferential portion of the vertical cutting hole 52. This makes it possible to effectively reduce the load during drilling, compared to a drill-type drilling bit that drills the vertical cutting hole 52 on the entire cross section.

In this embodiment, as shown in Figures 1 and 4(a) and (b), the drilling device body 30 is rotatably connected to the tip connector 15b of the boom body 15 of the slide boom section 13 via an attachment support 44 that constitutes part of the drilling device body 30. Since the drilling device body 30 is connected to the tip connector 15b of the boom body 15 of the slide boom section 13 via the attachment support 44, the drilling device body 30 can be supported by the boom body 15 of the slide boom section 13 so as to be able to move up and down and swing.

In this embodiment, the outrigger parts 12 on all four sides can be extended and retracted to adjust the base part 11 so that it is installed horizontally. However, if the surface of the bed hardened body 51 made of residual iron has a significant degree of unevenness, it may be difficult to install the base part 11 horizontally with precision by only extending and retracting the outrigger parts 12. By providing the mounting support part 44, in addition to the rotatable connection state of the drilling device main body 30 to the boom main body part 15 of the slide boom part 13, the mounting support part 44 allows the drilling device main body 30 to be precisely and easily adjusted so that the drilling rod 31 is vertically erected, and the height position of the tip of the drilling bit 31a can be precisely and easily adjusted so as to align with a specified cutting line. In addition, while the drilling rod 31 is held in a precisely vertically upright position, the slide fixing mechanism 25 of this embodiment moves the drilling rod 31 and drilling bit 31a along the slide rail section 16 of the slide boom section 13 with precision, allowing the drilling rod 31 and drilling bit 31a to be precisely moved in the forward and backward direction X along a predetermined cutting line.

The mounting support part 44 constituting the drilling device main body 30 includes a vertical guide plate part 45 that holds the vertical base part 32 so as to be slidable in the vertical direction, and a mounting plate part 47 that rotatably supports the vertical guide plate part 45 along a plane perpendicular to the forward and backward direction X via a rotary connecting plate 46. A pair of lower connecting rib plates 47a protrude from the lower part of the rear surface side of the forward and backward direction X of the mounting plate part 47. By pin-joining these lower connecting rib plates 47a to the rotary connecting pin member 15e attached to the tip connecting part 15b of the boom main body part 15 of the slide boom part 13, the drilling device main body 30 can be rotatably supported by the slide boom part 13 together with the mounting support part 44.

At the top of the rear surface of the mounting plate portion 47 in the forward/backward direction X, upper connecting rib plates 47b are provided in pairs on both sides, protruding from each other (see FIG. 4(b)). A jack connecting pin 47c is attached to the upper connecting rib plates 47b on both sides, which are bridged between the upper connecting rib plates 47b on both sides. The jack connecting pin 47c is rotatably connected to each of the pair of telescopic jacks 17 on both sides, the other ends of which are connected to both ends of the jack connecting pin member 15f provided on the boom body portion 15 of the slide boom portion 13, in the area between each pair of upper connecting rib plates 47b on both sides. As a result, the drilling device main body 30 can switch the drilling rod 31 of the drilling device main body 30 from a tilted state to a vertically erected state by driving these telescopic jacks 17 (see FIG. 4(a)), which connect the portion of the mounting support 44 above the tip connecting portion 15b of the slide boom section 13 and the portion of the boom main body 15 below the tip connecting portion 15b.

In this embodiment, lower oscillating support bases 47d are provided at the middle of the front side of the mounting plate portion 47 in the forward/backward direction X, protruding from both sides of the rotating connecting plate 46. These lower oscillating support bases 47d are rotatably connected to the other ends of a pair of oscillating jacks 48, one end of which is rotatably connected to an upper oscillating support base 45a provided at the upper part of the rear side of the vertical guide plate portion 45 in the forward/backward direction X.

The pair of oscillating jacks 48, which may be hydraulic jacks, are preferably arranged symmetrically, tilted toward the center line C of the width of the base 11, from the lower oscillating support base 47d, which is arranged on both sides of the rotating connecting plate 46, toward the upper oscillating support base 45a attached to the vertical guide plate 45. By appropriately extending and retracting the pair of oscillating jacks 48, the vertical guide plate 45 can be rotated relative to the mounting plate 47 around the rotating connecting plate 46, and oscillated left and right along a plane perpendicular to the forward and backward direction X, making it easy to adjust the drilling rod 31 of the drilling device main body 30 so that it stands vertically.

In addition, a pair of upper vertical support ribs 45b, to which one end of the vertical jack 49 is connected, are attached to both sides of the rear side of the vertical guide plate part 45 below the rotary connecting plate 46. The other end of the vertical jack 49 is connected to a lower vertical support rib 32a that is provided protruding from both sides of the lower end part of the rear side of the vertical base part 32 of the drilling device main body 30 in the forward and backward direction X. As a result, by extending and contracting the vertical jack 49 and sliding the vertical base part 32 up and down relative to the vertical guide plate part 45, it becomes possible to precisely position the drilling rod 31 and the drilling bit 31a at the lower end close to the surface of the bed part hardened body 51 made of residual iron while maintaining the drilling rod 31 preferably standing vertically.

As a method for drilling vertical cut holes in series using the vertical cut hole drilling device 10 of this embodiment having the above-mentioned configuration, preferably a line cut method is used to drill multiple vertical cut holes 52 in a line along a predetermined cutting line to cut the bed hardened body 51 (see Figure 3) made of residual iron. In this method, the drilling device body 30, which is rotatably connected to the tip connecting part 15b of the boom body part 15 of the slide boom part 13 via the mounting support part 44, is preferably raised vertically (see Figure 1), and the slide boom part 13 is moved to the tip of the slide rail part 16 in the forward/backward direction X, and the stopper part 18 is extended to fix the slide boom part 13 to the tip of the slide rail part 16.

In this state, the moving mechanism 40 consisting of a pair of crawler-type traveling devices 41 is operated to move the vertical cut hole consecutive drilling device 10 so that the pair of traveling devices 41 are positioned across the line of the predetermined cutting line, and the drill bit 31a at the lower end of the drilling rod 31 is positioned at a predetermined drilling position along the predetermined cutting line. The outrigger parts 12 provided at the four corners of the base part 11 are extended to ground the ground plate part 12c on the floor hardened body 51. By pressing the floor hardened body 51 with the ground plate part 12c until the moving mechanism 40 consisting of the crawler-type traveling devices 41 is lifted, the entire load of the vertical cut hole consecutive drilling device 10 can be stably supported on the floor hardened body 51 via the outrigger parts 12.

In addition, the base section 11, on which the slide boom section 13 and slide rail section 16 are provided, can be installed horizontally by extending the outrigger sections 12 provided at the four corners of the base section 11 and grounding the grounding plate section 12c to the hardened floor body 51. However, if, for example, the surface of the hardened floor body 51 has a significant degree of unevenness and it is difficult to install the base section 11 accurately horizontally by only extending and contracting the outrigger sections 12, as described above, it is possible to install the base section 11 accurately horizontally by extending and contracting the extension jack 17 that connects the mounting support section 44 of the drilling device main body 30 to the boom main body section 15 of the slide boom section 13, the oscillating jack 48 provided on the mounting support section 44, and the vertical jack 49 that connects the vertical guide plate section 45 of the mounting support section 44 to the vertical base section 32 of the drilling device main body 30. In addition, by bringing the drill bit 31a of the drill rod 31 close to the surface of the floor hardened body 51, it is possible to accurately position the drill bit 31a at a predetermined drilling position along a predetermined cutting line. Here, the levelness of the base 11 can be accurately adjusted while checking it with preferably multiple spirit levels or the like attached to the base 11 at a predetermined position.

As a result, the drilling rod 31 of the drilling device main body 30 is precisely set upright (vertical) directly above the predetermined cutting line, and the rotary drive unit 33 is operated to rotate the drilling rod 31 and the drilling bit 31a, which are guided by the vertical base unit 32 together with the rotary drive unit 33 and moved downward by the moving mechanism 34, and the drilling bit 31a vertically drills a vertical cutting hole 52 in the bed hardened body 51, which is a solid substance made of residual iron, using the rotary drive unit 33. At this time, the current value (torque value = resistance force) and thrust value (axial pressure value = reaction force) of the rotary drive unit 33 are measured, for example, in the cab 42 or control panel 43, and if these measured values become too high, they are controlled, for example, by slowing down the drilling speed. For example, when either or both of the current value and thrust value suddenly drop, the holes being drilled penetrate the hardened bed 51 made of residual iron, and the drilling work to form each vertical cutting hole 52 is completed.

In this embodiment, a boring bit is preferably used as the boring bit 31a, which is a core bit that cuts the circumferential portion of the vertical cutting hole 52. When the boring of each vertical cutting hole 52 is completed, the core portion of the residual iron left inside the boring rod 31 or the core bit 31a is removed as necessary. If the core portion remains at the lower end portion of the shaft of the boring rod 31 or inside the boring bit 31a, the boring rod 31 is tilted upward together with the vertical base portion 32 to ensure a height of the length of the remaining core and to prevent the core portion from falling inside the vertical cutting hole 52. In this state, for example, by hitting the periphery of the boring rod 31 or the boring bit 31a with a hammer, the core portion that remains inside by being caught on the bit of the boring bit 31a is vibrated and dropped. If it is difficult to remove the core or the length of the core (= boring length) is too long, the boring bit 31a can be removed from the boring rod 31 to remove the core. Also, if the core portion of the residual iron falls into the vertical cut hole 52 that has been created and remains in the hole, it is possible to wrap a wire or the like around the core remaining in the hole and pull it out.

Preferably, after removing the core from the drilling rod 31 and drilling bit 31a, the drilling rod 31 together with the vertical base portion 32 is returned to the vertically erected state, and then the slide boom portion 13, to which the drilling device main body 30 is connected via the mounting support portion 44, is released from its fixation to the slide rail portion 16 by the stopper portion 18. This makes it possible to move the slide boom portion 13, which has moved together with the drilling device main body 30 to the tip end of the slide rail portion 16 in the forward/backward direction X, slightly along the slide rail portion 16 to the rear end side, which is on the cab 42 side in the forward/backward direction X, in order to penetrate and form the next vertical cutting hole 52.

In this embodiment, the core bit drilling bit 31a has an outer diameter of 110 mm, a wall thickness of 10 mm, and an inner diameter of 90 mm, for example. By moving the slide boom section 13 100 mm at a time toward the rear end of the forward/backward direction X, a 10 mm lap is ensured, and a line cut method is used to drill multiple vertical cutting holes 52 in succession, forming a linear through groove 53, and cutting the floor hardened body 51 made of residual iron.

The slide rail section 16 is laid in the base section 11 in the region between the driver's cab 42 and the pair of outrigger sections 12 at the front, extending in the forward/backward direction X, for example, with a length of 1000 mm plus the length of the base section 14 of the slide boom section 13. This makes it possible to extend the outrigger section 12 and, with the vertical cut hole series drilling device 10 installed at a predetermined position on the cutting line, move the slide boom section 13 to which the drilling device main body 30 is connected along the slide rail section 16, for example, by 100 mm at a time, toward the rear end in the forward/backward direction X, to continuously form ten vertical cut holes 52 without moving the vertical cut hole series drilling device 10.

The outrigger section 12 is extended, and the vertical cut hole series drilling device 10 is installed at a predetermined position on the cutting line. The same operations as described above are repeated to form preferably 10 vertical cut holes 52 in succession, and then the outrigger section 12 is contracted to separate the ground plate section 12c from the floor hardened body 51, making the drilling device 10 movable via the moving mechanism 40. After that, the vertical cut hole series drilling device 10 is moved to the next construction location on the cutting line and reinstalled, and the same operations are repeated to subsequently form a through groove 53 with multiple vertical cut holes 52 by the line cut method.

As a result, in this embodiment, the method for drilling consecutive vertical cut holes using the vertical cut hole drilling device 10 includes the following steps: a first step of moving the vertical cut hole drilling device 10 to a predetermined position on the floor hardened body 51 using the moving mechanism 40 (for example, in the case where a through groove 53 has been previously drilled, to a position continuous with the vertical cut hole 52 at the rear end); a second step of extending the outrigger part 12 toward the floor hardened body 51 and grounding it on the solid material 51 to fix the vertical cut hole drilling device 10 on the floor hardened body 51; and a third step of forming consecutive vertical cut holes 52 in the floor hardened body 51 using the drilling device main body 30 while moving the slide boom part 13 back and forth toward the front end or rear end of the slide rail part 16.

In addition, in the vertical cutting hole consecutive drilling method of this embodiment, in the third step, the slide boom section 13 is moved to the position of the tip of the slide rail section 16, and the drilling device main body 30 is moved to a predetermined position above the floor hardened body 51 in the fourth step; the drilling device main body 30 is used to drill and form a vertical cutting hole 52 in the floor hardened body 51 in the fifth step; the slide boom section 13 is moved toward the rear end side of the slide rail section 16 by a distance corresponding to the diameter of the vertical cutting hole 52 that has been drilled, and the drilling device main body 30 is positioned so that the next vertical cutting hole 52 is connected to the vertical cutting hole 52 that has been drilled; and the drilling device main body 30 is used to drill and form the next vertical cutting hole 52 in the floor hardened body 51 in the seventh step. Note that the step of moving the slide boom section 13 to the position of the tip of the slide rail section 16 in the fourth step may be performed before moving the vertical cutting hole consecutive drilling device 10 in the first step.

Furthermore, in the method for drilling consecutive vertical cut holes according to this embodiment, in the third step, the eighth step is to drill a vertical cut hole 52 in the floor hardened body 51 using the drilling device main body 30, the ninth step is to move the slide boom section 13 toward the tip end side of the slide rail section 16 a distance according to the diameter of the drilled vertical cut hole 52, and position the drilling device main body 30 so that the next vertical cut hole 52 is connected to the vertical cut hole 52 that has been drilled, and the tenth step is to drill the next vertical cut hole 52 in the floor hardened body 51 using the drilling device main body 30.

In addition, in the vertical cut hole continuous drilling method of this embodiment, the drilling device body 30 is further connected to the slide boom section 13 so that it can rotate in the elevation direction and tilt back and forth, so that the drilling device body 30 can drill vertically into the floor hardened body 51. Therefore, after the fourth step or the ninth step, it is also possible to carry out a step of adjusting the rotation and tilt in the elevation direction of the drilling device body 30.

In addition, in the method for drilling consecutive vertical cut holes of this embodiment, the drilling device main body 30 further includes a drill bit 31a for cutting the hardened floor body 51, and the drill bit 31a cuts the circumferential portion of the vertical cut hole 52 to be drilled in the hardened floor body 51. Therefore, in the above-mentioned fourth or eighth step, after the vertical cut hole 52 is drilled, it is preferable to remove the residual pig iron that constitutes the hardened floor body 51, which was cut by the drill bit 31a and was left in the drill bit 31a, from the drill bit 31a.

In the method for drilling a series of vertical cut holes according to this embodiment, the fifth to seventh steps or the eighth to tenth steps described above can be repeated a number of times determined according to the overall length of the slide rail portion 16 and the diameter of the vertical cut holes 52.

Figures 7(a) to (e) are diagrams illustrating and explaining the procedure of the method for drilling consecutive vertical cut holes using the vertical cut hole drilling device 10. As shown in Figure 7(a), the moving mechanism 40 moves the vertical cut hole drilling device 10 to a predetermined position above the floor hardened body 51. In other words, the moving mechanism 40 is driven to move the vertical cut hole drilling device 10 to the location where the vertical cut holes are to be drilled. At this time, the slide boom section 13 may be positioned at the tip of the slide rail section 16, or may be positioned elsewhere.

As shown in FIG. 7(a), the outrigger section 12 is extended toward the floor hardened body 51 and grounded on the floor hardened body 51, thereby fixing the vertical cut hole continuous drilling device 10 onto the floor hardened body 51. That is, the outrigger section 12 is extended until the ground plate section 12c comes into contact with the floor hardened body 51. The same operation is performed for all four outrigger sections 12. In this case, the extension amount of the four outrigger sections 12 is adjusted so that the vertical cut hole continuous drilling device 10 is horizontal. Whether or not it is horizontal is determined by a level or the like provided on the vertical cut hole continuous drilling device 10.

As shown in FIG. 7(a), the slide boom section 13 is moved to the position of the tip of the slide rail section 16, and the drilling device body 30 is moved to a predetermined position above the floor hardened body 51. That is, by rotating the hydraulic motor 19, the pinion member 19a meshes with the rack 20a, and the slide boom section 13 can be moved to the desired position.

As shown in FIG. 7(a), the left-right rotation and inclination of the drilling device body 30 relative to the mounting plate 47 can be adjusted so that the drilling device body 30 can drill perpendicularly to the floor hardened body 51. The left-right rotation of the drilling device body 30 relative to the mounting plate 47 can be adjusted by appropriately extending and retracting the swing jack 48, and in FIG. 4(b), the left-right position on the page can be adjusted around the rotating connecting plate 46. The forward-rearward inclination of the drilling device body 30 can be adjusted by driving the telescopic jack 17, and in FIG. 4(a), the left-right position on the page (the forward and backward direction of the slide boom section 13) can be adjusted around the tip connecting section 15b.

As shown in FIG. 7(b), the drilling device main body 30 is moved toward the floor hardened body 51 by the moving mechanism 34 to drill a vertical cutting hole in the floor hardened body 51. Here, the drilling device main body 30 is provided with a drilling rod 31, and a drilling bit 31a is attached to the tip of the drilling rod 31. By rotating the drilling bit 31a while lowering the drilling device main body 30 by the moving mechanism 34, a vertical cutting hole can be drilled in the floor hardened body 51.

As shown in FIG. 7(c), the residual pig iron constituting the bed hardened body 51 left in the drill bit 31a is removed from the drill bit 31a. For example, while the residual pig iron is left in the drill bit 31a, the periphery of the drill bit 31a is struck with a hammer to vibrate the residual pig iron and cause it to fall from the drill bit 31a.

As shown in FIG. 7(d), the slide boom section 13 is moved toward the rear end of the slide rail section 16 by a distance corresponding to the diameter of the vertical cutting hole that has been drilled, and the drilling device body 30 is positioned so that the next vertical cutting hole is connected to the vertical cutting hole that has been drilled. For example, if the diameter of the vertical cutting hole that has already been drilled is 110 mm, the drilling device body 30 is positioned by retreating 100 mm to ensure a lap of 10 mm.

Again, as in FIG. 7(b), the drilling device main body 30 is used to drill the next vertical cutting hole in the floor hardened body 51. That is, the drilling device main body 30 is lowered by the movement mechanism 34 to drill the next vertical cutting hole.

In FIG. 7(e), the operations (b) to (d) are repeated a predetermined number of times. In the above description, the vertical cutting holes are drilled while the slide boom section 13 is moved backward toward the rear end of the slide rail section 16, but this is not limited to the above. For example, the vertical cutting holes may be drilled by moving the slide boom section 13 forward toward the tip end of the slide rail section 16. After this, the outrigger section 12 is moved away from the floor hardening body 51 and moved to the next work position by the moving mechanism 40. When forming a vertical cutting hole 52 in continuity with the previously formed through groove 53, the vertical cutting hole drilling device 10 is moved straight back, and the drilling device main body 30 is moved to the most forward position of the slide rail section 16, and stopped at a position where the rear end of the previous through groove 53 and the drilling bit 31a are continuous with a predetermined lap. This is equal to the distance that the slide boom section 13 moves on the slide rail section 16, so it is sufficient to move back about 1 m. After that, just go back to the procedure in Figure 7(a) and carry out the steps.

The vertical cut hole series drilling device 10 of this embodiment, which has the above-mentioned configuration, can form multiple vertical cut holes 52, preferably connected in a straight line, in the floor hardened body 51, which is a solid substance made of residual iron, a hard material, in a stable, accurate and efficient state.

That is, the vertical cut hole series drilling device 10 of this embodiment is composed of a base section 11 that can move over the floor hardened body 51, which is a solid substance, via a moving mechanism 40, outrigger sections 12 provided at the four corners of the base section 11, a slide boom section 13 that moves back and forth along the upper surface of the base section 11, a slide rail section 16 that guides the forward and backward movement of the slide boom section 13, and a drilling device main body 30 attached to the tip of the slide boom section 13, and the slide rail section 16 is configured to move the base section 14 of the slide boom section 13 inside the rectangular area R surrounded by the outrigger sections 12. The slide boom section 13 is composed of a base section 14 that is placed on the slide rail section 16, and a boom main body section 15 that stands upright from the base section 14 as a continuous member and is bent sideways via a bent section 15a, so that the tip connection section 15b to which the drilling device main body 30 is connected is positioned outside the area directly above the base section 14. The drilling device main body 30 is connected to the tip connection section 15b of the boom main body section 15 so that when the drilling rod 31 is set upright vertically, the drilling bit 31a is positioned outside the rectangular area R formed by the outrigger section 12.

As a result, when drilling vertical cutting holes 52 in a hard floor hardened body 51 formed, for example, by a lump of residual pig iron, the weight of the vertical cutting hole series drilling device 10 can be supported stably on the floor hardened body 51 by the outrigger parts 12 provided at the four corners of the base part 11. Compared to conventional drilling devices that are prone to becoming unstable because the weight of heavy machinery is supported on the floor hardened body 51 only by the ground contact part of the moving mechanism such as a crawler, the vertical cutting hole series drilling device 10's weight and the load during drilling are balanced to firmly and stably hold the drilling rod 31 upright, making it possible to form the vertical cutting hole 52 precisely and vertically.

The boom body 15 of the slide boom section 13 is erected in a curved state from the base 14 as a continuous member without the use of a rotating connection or an expandable section, so that the overall shape is compact and simple, making it possible to directly and efficiently transmit the load from the drilling device body 30 connected to the tip connection section 15b to the base 14. The base 14 of the slide boom section 13 moves along the slide rail section 16 attached to the base 11 inside the area R surrounded by the outrigger sections 12 on all four sides, so that the load applied from the boom body 15 can be distributed to all of the outrigger sections 12 on all four sides and efficiently transmitted, making it possible to support the floor hardened body 51 in a more stable state via the outrigger sections 12 on all four sides.

As a result, this embodiment makes it possible to effectively prevent the positional deviation of the drilling device body 30 and the drilling bit 31a, and to avoid the generation of excessive tipping moment. It is possible to hold the drilling device body 30 and the drilling rod 31 vertically, and to accurately drill holes in a stable state by connecting each of the multiple vertical cutting holes 52, preferably in a straight line.

In addition, according to the vertical cut hole continuous drilling device 10 of this embodiment, the slide fixing mechanism 25 is configured to include a slide rail section 16 equipped with a slide surface 16e extending in the forward/backward direction X, which is installed on the base section 11, a slide plate surface section 14c provided on the base section 14 of the slide boom section 13, which slides the slide boom section 13 along the slide rail section 16 while being in slidable surface contact with the slide surface 16e, and a stopper section 18 that can fix the slide boom section 13 at a predetermined position on the slide rail section 16 by a close frictional force by pressing a pressing section 18b provided so as to be protruding from the base section 14 of the slide boom section 13 toward the slide rail section 16 against the slide rail section 16.

As a result, the base plate 14 is placed on the slide rail 16 with the slide plate surface 14c to which the slide plate member 14b is attached as the mounting surface, and the slide boom 13 can smoothly slide along the slide rail 16 while transmitting the load applied during drilling to the slide rail 16 and the base 11 to which it is attached in a stable state by surface contact with the slide rail 16. In addition, by operating the stopper 18, the slide boom 13 can be fixed to each predetermined position of the slide rail 16. As a result, it is possible to efficiently form multiple vertical cutting holes 52 in a linear manner by the vertical cutting hole connecting drilling device 10 while supporting the large load applied during drilling in a stable state by the weight of the heavy equipment against the floor hardened body 51, which is a solid substance made of a hard material, without resetting the heavy equipment.

Furthermore, according to this embodiment, once the vertical cut hole series drilling device 10 is installed on a predetermined cutting line, the slide boom section 13 can be moved along the slide rail section 16 in this state to form multiple (10 in this embodiment) vertical cut holes 52 in a straight line, preferably without meandering. This eliminates the need to reinstall the drilling device 10 for each vertical cut hole 52, and reduces the number of work cycles, such as contracting the outrigger section 12, moving the drilling device 10, aligning the drilling device main body 30, and grounding the outrigger section 12, making it possible to efficiently and quickly form the through grooves 53 formed by multiple vertical cut holes 52.

In addition, in this embodiment, a core bit is used as the drill bit 31a attached to the lower end of the drill rod 31, and since the load during drilling can be effectively reduced compared to a drill-type drill bit, it is possible to increase the diameter of the vertical cut hole 52. This also makes it possible to reduce the number of vertical cut holes 52 for line cuts, for example, and more efficiently form the through groove 53 with multiple vertical cut holes 52. Since the core bit drill bit 31a drills while leaving a core portion on the inside, it is possible to form the vertical cut hole 52 in the vertical direction with even greater precision by using the inner core portion as a guide.

The present invention is not limited to the above embodiment and can be modified in various ways. For example, the moving mechanism does not necessarily have to be a crawler-type running device using a pair of endless tracks, and may be any other known moving mechanism used in heavy construction machinery. The forward and backward moving mechanism that moves the slide boom part in the forward and backward direction along the slide rail part does not necessarily have to be a mechanism that uses a pinion member and a rack member to engage with each other, and may be any other known moving mechanism using a screw jack or the like. The drill bit does not necessarily have to be a core bit that cuts the circumferential part of the vertical cutting hole, and may be a drill bit that cuts the entire cross section of the vertical cutting hole. The solid floor hardened body in which the vertical cutting hole is formed by the vertical cutting hole series drilling device does not necessarily have to be made of pig iron residue accumulated at the bottom of a blast furnace in a steelworks or pig iron residue discharged from the blast furnace, and may be any other hardened floor body made of a hard material, such as reinforced concrete. The vertical cutting hole does not have to be one that is drilled through a solid material. In other methods than the line cut method for forming through grooves, the vertical cut hole drilling device of the present invention can also be used when drilling vertical cut holes in a series. The vertical cut holes do not necessarily have to be multiple holes drilled in a straight line. For example, by installing a sliding fixing mechanism in two stages, one above the other, vertical cut holes can be drilled in a series in any position or manner.

10 Vertical cutting hole continuous drilling device (drilling device)
11 Base section 12 Outrigger section 12c Ground plate section 13 Slide boom section (boom section)
14 Base plate portion 14a Rail engagement mounting portion 14b Sliding plate member 14c Sliding plate surface portion (top surface portion of rail engagement mounting portion)
15 Boom body 15a Bending portion 15b Tip connecting portion 15c Curved support plate 15d Connecting box portion 16 Slide rail portion 17 Telescopic jack 18 Stopper portion 18b Pressing portion (stopper pin)
19 Hydraulic motor 19a Pinion member 20 Rack member 25 Slide fixing mechanism 30 Drilling device body 31 Drilling rod 31a Drilling bit (core bit)
32 Vertical base section 33 Rotation drive section 34 Movement mechanism 40 Movement mechanism 41 Crawler-type running device 42 Cab 43 Control panel 44 Mounting support section 45 Vertical guide plate section 46 Rotation coupling plate 47 Mounting plate section 48 Swing jack 49 Vertical jack 50 Blast furnace 51 Floor hardened body (solid material)
52 Vertical cut hole 53 Through groove R Square area surrounded by outrigger portion 12 X Advance/retreat direction Y Width direction C Width direction center line of base portion

Claims (20)

A vertical cut hole consecutive drilling device for forming a plurality of consecutive vertical cut holes in a solid material, comprising:
The drilling device is configured to include a base section that can move over the solid material via a moving mechanism, outrigger sections provided at the four corners of the base section, a slide boom section that is supported by the base section and moves back and forth along the upper surface of the base section, a slide rail section that is installed on the base section and that guides the forward and backward movement of the slide boom section, and a drilling device main body that is attached to the tip of the slide boom section,
the slide rail portion is provided to move a base plate portion of the slide boom portion inside a rectangular area of the base portion surrounded by the outrigger portion,
The slide boom section includes a base section slidably placed on the slide rail section, and a boom body section which is erected from the base section as a continuous member without an intervening rotary connecting section or an extendable section, and which is bent laterally via a bending section so that a tip connecting section to which the drilling device body is connected is positioned outside the area directly above the base section,
The drilling device main body is a vertical cutting hole continuous drilling device connected to the tip connecting portion of the boom main body so that when the drilling rod of the drilling device main body is erected vertically, the drilling bit at the lower end is positioned outside the rectangular area surrounded by the outrigger portion. The drilling device body is connected to the tip connector of the boom body so that it can rotate in the elevation direction, and the drilling rod can be switched from a tilted state to a vertically erected state by driving a telescopic jack that connects the part of the drilling device body above the tip connector and the part of the boom body below the tip connector. The vertical cut hole connection drilling device according to claim 1. a slide fixing mechanism that slides and moves the slide boom section in a forward and backward direction so as to be fixed at a predetermined position along the base section,
3. The vertical cut hole consecutive drilling device according to claim 1 or 2, wherein the slide fixing mechanism includes: the slide rail section having a slide surface installed on the base section and extending in the forward/backward direction; a sliding plate surface section provided on the base section of the slide boom section, which causes the slide boom section to slide along the slide rail section while being in slidable surface contact with the slide surface; and a stopper section which is provided so as to protrude from the base section of the slide boom section toward the slide rail section and presses the pressing section against the slide rail section, thereby fixing the slide boom section at a predetermined position on the slide rail section by means of adhesion friction force. The vertical cutting hole continuous drilling device according to claim 3, wherein the sliding plate surface portion provided on the base plate portion of the slide boom portion is formed by attaching a sliding plate member using a plate-shaped self-lubricating bearing to the mounting surface of a mounting portion that is placed on the slide rail portion. The vertical cutting hole continuous drilling device according to claim 3 or 4, wherein the stopper portion includes a hydraulic cylinder fixed to the base plate portion of the slide boom portion, and the pressing portion is inserted into an advance/retract through hole formed through the base plate portion and is capable of protruding from the base plate portion toward the slide rail portion by the operation of the hydraulic cylinder. The vertical cut hole continuous drilling device according to any one of claims 3 to 5, wherein the slide rail portion extends in the forward and backward directions, is arranged in parallel in a pair, and is fixed to the upper surface of the base portion. The vertical cut hole continuous drilling device according to claim 6, wherein a forward/backward movement mechanism for moving the slide boom section in the forward/backward direction is provided in the area between a pair of the parallel-arranged slide rail sections. The vertical cut hole continuous drilling device according to claim 7, wherein the forward/backward movement mechanism includes a rack member attached to the center of the width direction in the area between the pair of slide rails on the upper surface of the base unit, and a pinion member attached to a hydraulic motor fixed to the base plate of the slide boom unit and arranged to protrude below the base plate. The vertical cut hole continuous drilling device according to any one of claims 1 to 8, wherein the movement mechanism is a traveling device using a pair of caterpillar tracks arranged on both sides of the base unit, and the slide rail unit is arranged to extend parallel to the caterpillar tracks of the traveling device. The vertical cut hole continuous drilling device according to any one of claims 1 to 9, wherein the drill bit attached to the lower end of the drill rod is a core bit that cuts the circumferential portion of the vertical cut hole. A vertical cutting hole continuous drilling device according to any one of claims 1 to 10, in which the solid material is made of residual pig iron discharged from a blast furnace in a steelworks. A method for drilling consecutive vertical cut holes by the apparatus for drilling consecutive vertical cut holes according to any one of claims 1 to 11,
a first step of moving the vertical cut hole series drilling device to a predetermined position above the solid material by the moving mechanism;
a second step of extending the outrigger portion toward the solid material and grounding the outrigger portion against the solid material to fix the vertical cut hole series drilling device on the solid material;
a third step of forming vertical cut holes in the solid material by the drilling device body while moving the slide boom section forward and backward toward the front end side or the rear end side of the slide rail section;
A method for drilling continuous vertical cut holes, comprising: In the third step,
a fourth step of moving the slide boom section to the position of the tip end of the slide rail section and moving the drilling device body to a predetermined position above the solid material;
A fifth step of drilling a vertical cut hole in the solid material by the drilling device body;
a sixth step of moving the slide boom section toward the rear end side of the slide rail section by a distance corresponding to the diameter of the vertical cutting hole that has been drilled, thereby positioning the drilling device body so that a next vertical cutting hole is connected to the vertical cutting hole that has been drilled;
a seventh step of drilling the next vertical hole in the solid material by the drilling device body;
The method for drilling a series of vertical cut holes according to claim 12, further comprising the steps of: In the third step,
an eighth step of drilling a vertical cut hole in the solid material by the drilling device body;
a ninth step of moving the slide boom section toward the tip end side of the slide rail section by a distance corresponding to the diameter of the vertical cutting hole that has been drilled, thereby positioning the drilling device body so that a next vertical cutting hole is connected to the vertical cutting hole that has been drilled;
a tenth step of drilling the next vertical hole in the solid material by the drilling device body;
The method for drilling a series of vertical cut holes according to claim 12, further comprising the steps of: The drilling device body is further connected to the slide boom section so as to be rotatable in an elevation direction and tiltable back and forth,
The method for drilling a series of vertical cut holes according to claim 13 , further comprising the step of adjusting the rotation and inclination of the drilling device body so that the drilling device body can drill holes perpendicular to the solid material, after the fourth step . The drilling device body further includes a drill bit for cutting the solid material, the drill bit cutting a circumferential portion of the vertical cutting hole to be drilled in the solid material,
The method for drilling consecutive vertical cut holes according to claim 13, wherein in the fourth step , after the formation of the vertical cut holes, residual iron constituting the solid material cut by the drill bit and left in the drill bit is removed from the drill bit. 14. The method for drilling a series of vertical cut holes according to claim 13 , wherein the fifth to seventh steps are repeated a number of times determined according to an overall length of the slide rail portion and a diameter of the vertical cut holes. The drilling device body is further connected to the slide boom section so as to be rotatable in an elevation direction and tiltable back and forth,
The method for drilling a series of vertical cut holes according to claim 14, further comprising the step of adjusting the rotation and inclination of the drilling device body after the ninth step so that the drilling device body can drill holes perpendicular to the solid material. The drilling device body further includes a drill bit for cutting the solid material, the drill bit cutting a circumferential portion of the vertical cutting hole to be drilled in the solid material,
The method for drilling consecutive vertical cut holes according to claim 14, wherein in the eighth step, after the formation of the vertical cut holes, residual iron constituting the solid material cut by the drill bit and left in the drill bit is removed from the drill bit. 15. The method for drilling a series of vertical cut holes according to claim 14, wherein steps 8 to 10 are repeated a number of times determined according to an overall length of the slide rail portion and a diameter of the vertical cut holes.

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