Vertical cutting hole consecutive drilling device and vertical cutting hole consecutive drilling method

Abstract

To provide a vertical cut hole continuous boring device that can form vertical cut holes in a cured floor composed of a hard material in a linearly continuous stable manner with accuracy and efficiency.SOLUTION: A vertical cut hole continuous boring device includes: a base part 11 movable through a movement mechanism 40; outriggers 12 provided at four corners; a slide boom 13; a slide rail part 16 that guides an advance or retreat movement of the slide boom part 13; and a boring device body 30 mounted to a tip of the slide boom part 13. The slide rail parts 16 are provided in a square region R surrounded by the outriggers 12. A boom body 15 part of the slide boom part 13 is erected from a substrate part 14 as a continuous member without a rotation connector or an expander interposed therebetween and is also bent sideward through a curving bending part 15a. Thus, the boring device body 30 is disposed at an external side of the square region R surrounded by the outriggers 12.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a vertical cut hole consecutive drilling device and a vertical cut hole consecutive drilling method, and more particularly to a vertical cut hole consecutive drilling device for consecutively drilling a plurality of vertical cut holes in a solid material, and a vertical cut hole consecutive drilling method using the vertical cut hole consecutive drilling device. [Background technology]

[0002] For example, in steelworks, pig iron left at the bottom of a blast furnace may be removed during renovation work, or pig iron that has been temporarily discharged to a pit outside the furnace while the equipment is in operation may be removed. This pig iron is removed in a solid state, but because of its large specific gravity, it is broken down into smaller pieces so that the weight is small enough to be transported.

[0003] Various methods have been developed in the past for dismantling pig iron that has been left behind as such a solid substance. For example, in the residual pig iron dismantling method described in Patent Document 1, blasting holes are drilled in the residual pig iron, which is a solid substance left at the bottom of a blast furnace, and the residual pig iron is then 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 the noise and impact caused by blasting, and the possibility of damage to equipment such as blast furnaces.

[0004] Furthermore, as a safer method, Patent Document 2, for example, proposes cutting the residual pig iron with a wire saw to break it into small pieces, which are then transported outside the furnace. However, this method has many limitations, as it requires the installation of a wire saw around the outer periphery of the cut surface of the residual pig iron, which is very time-consuming, and it is difficult to arrange multiple wire saws in an intersecting pattern.

[0005] In response to this, for example, Patent Document 3 proposes a method (line cut method) of cutting the residual pig iron in a line 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 residual pig iron, while lining up the holes along a predetermined cutting line.Furthermore, for example, Patent Document 4 proposes using a core bit drilling 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 its entire cross section. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] JP 2000-256717 A [Patent Document 2] JP 2011-153327 A [Patent Document 3] JP 2012-162787 A [Patent Document 4] JP 2020-2386 A Summary of the Invention [Problem to be solved by the invention]

[0007] However, according to a conventional device for forming a vertical cut hole, which is preferably used in the above-mentioned line cut method, for example, in a mountain tunnel construction method, a vertical cut hole is formed using a device with a drill bit for mainly drilling a blast hole in a horizontal direction in a rock mass. Therefore, when drilling a vertical cut hole in a solid material 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 a rock mass, 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 accuracy.

[0008] 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 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, thereby stabilizing 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 floor hardened body, and each time a vertical cut hole is formed, it is necessary to reset the heavy machine (crawler) while drilling.As a result, it takes time to move and set up, and it is difficult to efficiently form multiple vertical cut holes, preferably connected together in a straight line.

[0009] For this reason, there is a demand for the development of a new drilling device that can drill holes vertically into solid substances, 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.

[0010] The object of the present invention is to provide a drilling device and a drilling method for connected vertical cut holes that can form multiple vertical cut holes, preferably connected in a straight line, in a stable manner, accurately and efficiently, even in solid substances made of hard materials. [Means for solving the problem]

[0011] The present invention is a vertical cut hole continuous drilling device for forming a plurality of continuous vertical cut holes to be drilled in a solid material, the device including a base section that can move over the solid material via a moving mechanism, outrigger sections provided on 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, the slide rail section being provided to move a base section of the slide boom section inside a quadrangular 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 is erected from the base section as a continuous member without any intervening rotary connecting section or extendable section, and is bent laterally via a bending section, thereby positioning the tip connecting section to which the drilling device main body is connected outside the area directly above the base section, and the drilling device main body is connected to the tip connecting 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, thereby achieving the above-mentioned object.

[0012] Furthermore, in the vertical cut hole consecutive drilling device of the present invention, it is preferable that the drilling device main body is rotatably connected to the tip connecting portion of the boom main body in an elevation and depression direction, and that the drilling rod can be switched from a tilted state to a vertically upright state by driving an extension jack connecting the portion of the drilling device main body above the tip connecting portion and the portion of the boom main body below the tip connecting portion.

[0013] Furthermore, the vertical cut hole consecutive drilling device of the present invention is preferably equipped with a slide fixing mechanism which 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 having a slide surface installed on the base section and extending in the forward and backward directions, a slide plate surface section which 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 which is provided to protrude from the base section of the slide boom section towards 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 adhesion friction force.

[0014] 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 section is formed by attaching a sliding plate member using a plate-shaped self-lubricating bearing to the supporting surface of a supporting section that is placed on the slide rail section.

[0015] Furthermore, it is preferable that the vertical cut hole continuous drilling device of the present invention is configured so that 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 / retreat through hole formed through the base plate portion and is capable of protruding from the base plate portion toward the slide rail portion by operation of the hydraulic cylinder.

[0016] In the vertical cut hole continuous drilling device of the present invention, it is preferable that the slide rail portion is extended in the advance / retract direction, is arranged in parallel as a pair, and is fixed to the upper surface of the base portion.

[0017] Furthermore, it is preferable that the vertical cut hole consecutive drilling device of the present invention is provided with an advance / retract movement mechanism for moving the slide boom section in an advance / retract direction in the area between a pair of the parallel arranged slide rail sections.

[0018] Furthermore, it is preferable that the vertical cut hole consecutive drilling device of the present invention is configured so that the advance / retract movement mechanism includes a rack member extending in the advance / retract direction and attached to the central portion in the width direction of the area between the pair of slide rail portions on the upper surface of the base portion, and a pinion member attached to a hydraulic motor fixed to the base portion of the slide boom portion and arranged to protrude below the base portion.

[0019] In addition, it is preferable that the vertical cutting hole continuous drilling device of the present invention has a moving mechanism that is a running device using a pair of endless tracks arranged on both sides of the base portion, and that the slide rail portion is arranged extending parallel to the endless tracks of the running device.

[0020] 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.

[0021] Furthermore, in the vertical cut hole continuous drilling apparatus of the present invention, it is preferable that the solid material is a residual pig iron discharged from a blast furnace in a steelworks.

[0022] In addition, the present invention achieves the above-mentioned object by providing a method for drilling consecutive vertical cut holes using the above-mentioned vertical cut hole consecutive drilling device, which includes a first step of moving the vertical cut hole consecutive drilling device to a predetermined position above the solid substance by the moving mechanism, a second step of fixing the vertical cut hole consecutive drilling device on the solid substance by extending the outrigger portion toward the solid substance and grounding it on the solid substance, and a third step of forming consecutive vertical cut holes in the solid substance by the drilling device main body while moving the slide boom portion back and forth toward the front end side or rear end side of the slide rail portion.

[0023] It is preferable that the vertical cutting hole consecutive drilling method of the present invention is 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 end 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 cutting 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 cutting hole that has been drilled, and positioning the drilling device main body so that a next vertical cutting hole is connected to the vertical cutting hole that has been drilled; and a seventh step of drilling the next vertical cutting hole in the solid material using the drilling device main body.

[0024] In addition, it is preferable that the vertical cutting hole consecutive drilling method of the present invention is configured to execute the following steps in the third step: an eighth step of drilling a vertical cutting hole in the solid material using the drilling device main body; a ninth step of moving the slide boom section toward the tip side of the slide rail section a distance corresponding to the diameter of the vertical cutting hole that has been drilled, thereby positioning the drilling device main body so that a next vertical cutting hole is connected to the vertical cutting hole that has been drilled; and a tenth step of drilling the next vertical cutting hole in the solid material using the drilling device main body.

[0025] In addition, in the vertical cut hole consecutive drilling method of the present invention, it is preferable that the drilling device body is further connected to the slide boom section so that it can be rotatably elevated and tilted back and forth, and a step of adjusting the rotation and inclination 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, wherein the drilling device body is rotatably and tiltably connected to the slide boom section so that it can be rotatably elevated and tilted back and forth, and a step of adjusting the rotation and inclination 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.

[0026] In addition, in the vertical cut hole consecutive drilling method of the present invention, the drilling device main body further includes a drill bit for cutting the solid material, the drill bit cuts the circumferential portion of the vertical cut hole to be drilled in the solid material, and in the fourth step or the eighth step, after the vertical cut hole is formed, it is preferable that residual iron constituting the solid material that has been cut by the drill bit and left in the drill bit is removed from the drill bit.

[0027] Furthermore, it is preferable that the method for drilling a series of 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 total length of the slide rail portion and the diameter of the vertical cut holes. Effect of the Invention

[0028] According to the vertical cut hole connecting drilling device or the vertical cut hole connecting drilling method of the present invention, a plurality of vertical cut holes can be formed in a solid substance made of a hard material, preferably connected in a straight line, in a stable manner, with high precision and efficiency. [Brief description of the drawings]

[0029] [Figure 1] 1 is a side view illustrating a vertical cut hole continuous drilling device according to a preferred embodiment of the present invention. FIG. [Diagram 2] 1 is a plan view illustrating a vertical cut hole continuous drilling device according to a preferred embodiment of the present invention; [Diagram 3] 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. [Figure 4] 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. [Diagram 5]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 seen from above. [Figure 6] 5(a) is a cross-sectional view taken along the line AA in FIG. 5(a), and (b) is an enlarged view of part B in (a). [Figure 7] 1(a) to 1(e) are diagrams illustrating an example of a procedure for a method for drilling consecutive vertical cut holes using a device for drilling consecutive vertical cut holes. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0030] The vertical cut hole series drilling device 10 according to a preferred embodiment of the present invention shown in Figures 1 and 2 is used in a line-cutting construction work in which a lump of residual pig iron left as a solid bed hardened body 51 by pig iron remaining at the bottom of a blast furnace 50 is cut linearly by a line-cutting construction method that forms a through groove 53 by a plurality of vertical cut holes 52 that are connected along a predetermined cutting line, as shown in Figure 3, in a steelworks. That is, the vertical cut hole series drilling device 10 of this embodiment is used as a drilling device specialized in the work of drilling holes perpendicular to the surface of the bed hardened body 51, which is a solid material, in order to form a plurality of vertical cut holes 52 that constitute the through groove 53 by connecting them preferably linearly in the bed hardened body 51, which is a hard solid material having considerable strength, for example. The vertical cutting hole series drilling device 10 of this embodiment has the function of drilling a plurality of vertical cutting holes 52, preferably as through holes, vertically penetrating the residual iron forming a hard floor hardened body 51, for example, and arranging them in a straight line to form them in a stable, accurate and efficient state.

[0031] 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 includes a base part 11 that can move on 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 back and forth along the upper surface of the base part 11, a slide rail part 16 provided 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 plate part 14 of the slide boom part 13 inside the rectangular area 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 slidably placed on the slide rail section 16, and a boom main section 15 which stands upright from the base section 14 as one continuous member without any intervening rotary connecting section or expandable section, and which is preferably bent laterally via a curved bending section 15a so that a tip connecting section 15b to which a drilling device main section 30 is connected is located outside the area directly above the base section 14. The drilling device main section 30 is connected to the tip connecting section 15b of the boom main section 15 so that a drilling bit 31a at the lower end is located outside a rectangular area R surrounded by the outrigger sections 12 when its drilling rod 31 is set upright vertically.

[0032] In addition, in this embodiment, the drilling device main body 30 is preferably connected to the tip connecting part 15b of the boom main body part 15 of the slide boom section 13 so as to be rotatable in the elevation direction, via an attachment support part 44 that supports the drilling device main body 30 so as to be able to move up and down and swing, and by driving the telescopic jack 17 that connects the portion above the tip connecting part 15b of the attachment support part 44 that constitutes the drilling device main body 30 and the portion below the tip connecting part 15b of the boom main body part 15, the drilling rod 31 of the drilling device main body 30 can be switched from a tilted state to a vertically upright state.

[0033] Furthermore, in this embodiment, the vertical cut hole series drilling device 10 includes a slide fixing mechanism 25 that slides and moves the slide boom portion 13 in the forward and backward direction X along the base portion 11 so as to be fixable to a predetermined position. The slide fixing mechanism 25 is a mechanism for, in the vertical cut hole continuous drilling device 10, sliding the slide boom section 13, to which the drilling device main body 30 is attached at its tip, in the forward / backward direction X along the base section 11, which is movable over the floor hardened body 51 via the moving mechanism 40, so as to be fixed at a predetermined position. The slide fixing mechanism 25 is configured to include a slide rail section 16 having a slide surface 16e (see FIGS. 6(a) and 6(b)) installed on the base section 11 and extending in the forward / backward direction X, 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 capable of fixing the slide boom section 13 at a predetermined position on the slide rail section 16 by a contact friction 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.

[0034] In this embodiment, the moving mechanism 40 that moves the vertical cut hole continuous drilling device 10 along the upper surface of the bed hardened body 51 (see FIG. 3) made of residual pig iron is a known crawler type traveling device 41 equipped with a pair of caterpillars 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 onto the cutting line of the through groove 53 of the vertical cut hole 52 in the bed hardened body 51 with the outrigger part 12 not touching the ground.

[0035] The base 11 is preferably formed to have a generally vertically elongated rectangular planar shape as a whole by assembling various steel materials, and is fixed integrally to a support base (not shown) provided between a pair of crawler-type traveling devices 41 so as to connect them, so that it is disposed directly above the moving mechanism 40, and can move on the floor hardened body 51 as the moving mechanism 40 moves, for example, when an operator in a cab 42 (see FIG. 1) operates the moving mechanism 40. The base 11 is provided with various known required facilities and equipment such as a cab 42, a control panel 43, an electric motor, a fuel tank, etc., in addition to a slide boom section 13 and a slide rail section 16 described later. 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.

[0036] The outrigger section 12 is configured with a known extension mechanism equipped with a cylinder section 12a, a piston rod section 12b, and a grounding plate section 12c, and can be extended and retracted, for example by hydraulic pressure, by sliding the piston rod section 12b relative to the cylinder section 12a fixed to the base section 11, so that the grounding plate section 12c attached to the lower end of the piston rod section 12b can be grounded by pressing it against the upper surface of the floor hardened body 51 to obtain supporting force from the floor hardened body 51, or can be moved away from the floor hardened body 51 to make the drilling device 10 movable via the moving mechanism 40. By grounding the outrigger sections 12 provided at the four corners of the base section 11 on the floor hardened body 51 to support the weight of the drilling device 10, when drilling a vertical cut 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 section 13 and the slide fixing mechanism 25, can be supported in a stably state by the weight of the drilling device 10.

[0037] As described above, the slide boom section 13, which moves back and forth along the upper surface section of the base section 11, is configured to include the base plate section 14 and the boom main body section 15. As shown in Figures 4(a), (b) and 5(a), (b), the base plate section 14 is a section that serves as a slide base when the slide boom section 13 is moved back and forth in the forward and backward direction X, and the boom main body section 15 is a 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 as it is to the base plate section 14 in a stable state and supports it.

[0038] 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 center line 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 having a thickness of, for example, about 40 to 50 mm, and the entire plate is bent laterally (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 located outside the area directly above the base plate 14.

[0039] That is, each curved support plate 15c has a curved side shape that is surrounded by a straight bottom portion joined to the base portion 14, an approximately quarter-circular arc-shaped outer peripheral portion, an approximately quarter-circular arc-shaped 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 curvature direction smoothly and gradually narrows from the base portion 14 toward the tip connecting portion 15b.

[0040] The connecting box part 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 part curved with a radius of curvature slightly smaller than that of the outer peripheral part of the curved support plate 15c, an inner peripheral surface part curved with a radius of curvature slightly larger than that of the inner peripheral part of the curved support plate 15c, and a vertical end surface part extending in the vertical direction in front of the semicircular tip edge part of the curved support plate 15c and connecting the outer peripheral surface part and the inner peripheral surface part. The connecting box part 15d is attached to the curved support plate 15c so that the curved support plates 15c are firmly connected as one unit and a hollow box shape is formed between them 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 while the outer peripheral surface part is aligned along the outer peripheral part of the curved support plate 15c and the inner peripheral surface part is aligned along the inner peripheral part of the curved support plate 15c.

[0041] As a result, the boom main body 15 is erected as a continuous single member from the base portion 14, which is slidably placed on the slide rail portion 16, without any intervening rotary connecting portion or extendable portion, and is preferably bent sideways via a bent portion 15a that extends over its entire length, so that the tip connecting portion 15b, to which the drilling device main body 30 is connected via the mounting support portion 44 described later, is positioned outside the area directly above the base portion 14.

[0042] In addition, a rotary connecting pin member 15e is attached to the tip connecting portion 15b of the boom main body 15, at a portion closer to the tip than the vertical end face portion of the connecting box portion 15d, between the curved support plates 15c on both sides, and the rotary connecting pin member 15e connects the mounting support portion 44 of the drilling device main body 30 described later so as to be rotatable in the elevation direction. In the lower portion of the boom main body 15, which is lower than the tip connecting portion 15b, a jack connecting pin member 15f is attached, which is mounted between the curved support plates 15c on both sides, and connects one end of the telescopic jack 17, passing through the hollow interior of the connecting box portion 15d and with both ends protruding outside the respective curved support plates 15c.

[0043] Furthermore, in this embodiment, a steel pipe member 15g having a circular hollow cross section is installed between the curved support plates 15c on both sides at the vertical middle part of the boom main body 15, penetrating the hollow interior of the connection box part 15d and attached with both ends open to the curved support plates 15c. By installing the steel pipe member 15g between the curved support plates 15c of the boom main body 15, the steel pipe member 15g functions as a reinforcing rib for the left and right curved support plates 15c, and it becomes possible to effectively prevent the boom main body 15 from being easily twisted due to a large unbalanced load applied.

[0044] The base plate 14 of the slide boom section 13 is made of a steel plate having 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 thereto of about 1200 to 1300 mm. The curved support plate 15c is integrally joined to the upper surface of the base plate 14 by welding or the like, and both side edge portions in the width direction Y are bent into a hook shape so as to have a U-shaped cross section, thereby forming rail engagement placement portions 14a on which the slide plate surface portion 14c is placed on the slide rail portions 16 in a state where it is engaged with the pair of slide rail portions 16 so as to embrace them from the outside (see Figs. 4(b) and 6(a)).

[0045] On the inner surface of the rail locking 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 portion 14c which serves as the mounting surface, the side surface portion, and the bottom surface portion, via connecting metal fittings (see FIG. 6(a)). The top surface portion which serves as the mounting surface of the rail locking 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 causes the slide boom portion 13 to slide 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 supporting surface.This allows the slide boom section 13 to smoothly slide along the slide rail section 16, by making surface contact with 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.

[0046] 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. 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 provided so as to be protruding from the base plate portion 14 toward the slide rail portion 16 by moving forward and backward in the vertical direction by the operation of the hydraulic cylinder 18a while being inserted into an advance / retract through hole 18c formed by penetrating the base plate portion 14 directly below the hydraulic cylinder 18a. The stopper portion 18 moves the stopper pin 18b downward to press the upper surface of the slide rail portion 16, and thereby stops and fixes the slide boom portion 13 that has been slid along the slide rail portion 16 to a predetermined position by the adhesion frictional force, and firmly holds it at the predetermined position. In addition, by moving the stopper pin 18b upward and releasing the pressure on the upper surface of the slide rail portion 16, it becomes possible to make the slide boom portion 13 slidable along the slide rail portion 16.

[0047] Furthermore, in this embodiment, as shown in Figs. 4(a) and 4(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 advancing / retreating direction X, and are provided symmetrically 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 widthwise direction Y of the upper surface of the base 11 so as to sandwich the racks 20a from both sides, so that the slide boom section 13, which is composed of the base plate 14 and the boom main body 15 integrated therewith, can be pushed out or pulled in in the advancing / retreating direction X with the rotation of the hydraulic motor 19, and can be moved forward and backward along the slide rail section 16.

[0048] That is, in this embodiment, an advance / retract movement mechanism 22 for moving the slide boom section 13 in the advance / retract direction X is provided in the area between a pair of parallel arranged slide rail sections 16, and the advance / retract movement mechanism 22 is configured to include a rack member 20 attached to the widthwise central part of the area between the pair of slide rail sections 16 on the upper surface of the base section 11, and extending in the advance / retract direction X, and a pinion member 19a attached to a hydraulic motor 19 fixed to the base section 14 of the slide boom section 13 and arranged to protrude below the base section 14.

[0049] In this embodiment, as shown in Figs. 5(a), (b) and 6(a), (b), the slide rail section 16 for guiding the forward and backward movement of the slide boom section 13 is made of, for example, a steel member having an L-shaped cross section (see Fig. 6(a)), and is fixed in a pair on both sides of the rack member 20 fixed to the center in 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 the L-shaped cross-sectional shape 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.

[0050] The rail locking placement portion 14a of the base plate portion 14 of the slide boom portion 13 described above is locked to 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 portion of the other side portion 16b directly above the one side portion 16a, extending along the forward / reverse direction X, in an embedded manner (see Fig. 5(b) and Fig. 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.

[0051] 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 predetermined intervals 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 joining state of the slide rail portion 16 to the base portion 11 and improves the fixing strength.

[0052] In this embodiment, the pair of slide rail parts 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 parts 12 in the base part 11 (see Figs. 1 and 2). This makes it possible for the slide rail parts 16 to move the base plate part 14 of the slide boom part 13 inside the rectangular area R surrounded by the four outrigger parts 12 in the base part 11. This also makes it possible for the drilling device main body 30 connected to the tip connecting part 15b of the curved boom main body part 15 of the slide boom part 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 arranged outside the rectangular area R surrounded by the four outrigger parts 12 when the drilling rod 31 of the drilling device main body 30 is vertically erected.

[0053] 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 to move 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.

[0054] The drilling device main body 30 is configured to rotate 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, thereby drilling and forming a vertical cutting hole 52 in the bed hardened body 51 made of residual pig iron (see FIG. 3). In this embodiment, as the drilling bit 31a attached to the lower end of the drilling rod 31, a drilling bit using a core bit that cuts the circumferential part of the vertical cutting hole 52 is preferably used. 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 over the entire cross section.

[0055] 1 and 4(a) and (b), in this embodiment, 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 a 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, it becomes possible for the drilling device body 30 to 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.

[0056] 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 can be installed horizontally, but if the surface of the bed hardened body 51 made of residual iron has a considerable degree of unevenness, it may be difficult to install the base part 11 accurately horizontally only by extending and retracting the outrigger parts 12. By providing the mounting support part 44, in addition to the rotatable connection 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 stands vertically by the up-down movement and swinging motion, and the height position of the tip of the drilling bit 31a can be precisely and easily adjusted so as to be aligned with a predetermined cutting line. In addition, while maintaining the drilling rod 31 in a precisely vertically upright position, the slide fixing mechanism 25 of this embodiment moves the drilling rod 31 and the drilling bit 31a along the slide rail portion 16 of the slide boom section 13 with precision, making it possible to move the drilling rod 31 and the drilling bit 31a precisely in the forward / backward direction X along a predetermined cutting line.

[0057] The mounting support part 44 constituting the drilling device main body 30 includes a vertical guide plate part 45 which holds the vertical base part 32 so as to be slidable in the vertical direction, and a mounting plate part 47 which rotatably supports the vertical guide plate part 45 along a plane perpendicular to the advancing / retreating direction X via a rotary connecting plate 46. A pair of lower connecting rib plates 47a are provided protruding from the lower part of the rear surface side of the advancing / retreating direction X of the mounting plate part 47. By pin-joining these lower connecting rib plates 47a to the rotary connecting pin members 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 together with the mounting support part 44 can be rotatably supported by the slide boom part 13.

[0058] A pair of upper connecting rib plates 47b are provided on both sides of the upper part of the rear surface side of the mounting plate portion 47 in the forward / backward direction X, protruding from each side (see FIG. 4(b)). A jack connecting pin 47c is attached to span between these pairs of upper connecting rib plates 47b on both sides. The other ends of a pair of telescopic jacks 17 on both sides, one end of which is connected to both ends of a jack connecting pin member 15f provided on the boom main body portion 15 of the slide boom portion 13, are rotatably connected to the jack connecting pin 47c in the portion between each pair of upper connecting rib plates 47b on both sides. As a result, by driving these telescopic jacks 17 which connect the portion of the mounting support part 44 above the tip connecting part 15b of the slide boom part 13 and the portion of the boom main body part 15 below the tip connecting part 15b (see Figure 4 (a)), the drilling rod 31 of the drilling device main body 30 can be switched from a tilted state to a vertically upright state.

[0059] In this embodiment, lower swing support bases 47d are provided at the middle of the front side of the mounting plate portion 47 in the advancing / retreating direction X, protruding from both side portions sandwiching the rotary connecting plate 46. One end of a pair of swing jacks 48 is rotatably connected to an upper swing support base 45a provided at the upper portion of the rear side of the vertical guide plate portion 45 in the advancing / retreating direction X. The other end of each of the pair of swing jacks 48 is rotatably connected to each of the lower swing support bases 47d.

[0060] The pair of swing jacks 48, which may be hydraulic jacks, are preferably arranged symmetrically from the lower swing support bases 47d arranged on both sides of the rotary connecting plate 46 toward the upper swing support base 45a attached to the vertical guide plate portion 45, in a state inclined toward the widthwise center line C of the base portion 11. By appropriately extending and contracting the pair of swing jacks 48, the vertical guide plate portion 45 can be rotated relative to the mounting plate portion 47 around the rotary connecting plate 46, and can be swung left and right along a plane perpendicular to the forward and backward direction X, making it possible to easily adjust the drilling rod 31 of the drilling device main body 30 so that it stands vertically.

[0061] In addition, a pair of upper vertical support ribs 45b, to which one end of a vertical jack 49 is connected, are attached to both sides of the rear surface of the vertical guide plate 45 below the rotary connecting plate 46. The other end of the vertical jack 49 is connected to a lower vertical support rib 32a provided protruding from both sides of the lower end of the rear surface of the vertical base 32 of the drilling device main body 30 in the forward / backward direction X. This makes it possible to precisely position the drilling rod 31 and the drilling bit 31a at the lower end close to the surface of the bed hardened body 51 made of residual pig iron while maintaining the drilling rod 31 preferably standing vertically by extending and retracting the vertical jack 49 to slide the vertical base 32 up and down relative to the vertical guide plate 45.

[0062] As a method for drilling consecutive vertical cut holes using the vertical cut hole consecutive drilling device 10 of this embodiment having the above-mentioned configuration, preferably a line cut method is used to drill a plurality of vertical cut holes 52 in a line along a predetermined cutting line to cut the floor hardened body 51 (see Figure 3) made of residual iron. 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 section 13 via the mounting support part 44, is preferably raised vertically (see Figure 1), and the slide boom section 13 is moved to the tip of the slide rail section 16 in the forward / backward direction X and the stopper part 18 is extended to fix the slide boom section 13 to the tip of the slide rail section 16.

[0063] 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 drill 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. Preferably, the ground plate part 12c is pressed against the floor hardened body 51 until the moving mechanism 40 consisting of the crawler-type traveling devices 41 floats, thereby making it possible to stably support the entire load of the vertical cut hole consecutive drilling device 10 on the floor hardened body 51 via the outrigger parts 12.

[0064] In addition, it is also possible to install the base section 11, on which the slide boom section 13 and slide rail section 16 are provided, 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 floor hardened body 51. However, if, for example, the surface of the floor hardened 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 and 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 and the vertical base section 32 of the drilling device main body 30. In addition, the drill bit 31a of the drill rod 31 can be brought close to the surface of the bed hardened body 51, and the drill bit 31a can be accurately positioned at a predetermined drilling position along a predetermined cutting line. Here, the horizontality of the base 11 can be accurately adjusted while being checked by preferably a plurality of spirit levels or the like attached to the base 11 at predetermined positions.

[0065] As a result, the drilling rod 31 of the drilling device main body 30 is precisely set upright (vertical) just 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, so that the drilling bit 31a vertically drills and forms a vertical cutting hole 52 in the bed hardened body 51, which is a solid material made of residual pig iron. 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 operator's 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 drilling operation to form each vertical cutting hole 52 is completed, assuming that the hole being drilled has penetrated the floor hardened body 51 made of residual iron.

[0066] In this embodiment, the boring bit 31a is preferably a core bit that cuts the circumferential portion of the vertical cut hole 52. When the boring of each vertical cut hole 52 is completed, the core portion of the residual pig iron left inside the boring rod 31 or the core bit 31a is removed as necessary. If the core portion remains inside 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 cut 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 by 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 take out the core. In addition, if a core portion made of residual iron falls inside the formed vertical cut hole 52 and remains inside the hole, it is possible to wrap a wire or the like around the core remaining inside the hole and pull it out.

[0067] Preferably, after removing the core from the drilling rod 31 and the 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 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 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 operator's cab 42 side in the forward / backward direction X, in order to penetrate and form the next vertical drilled hole 52.

[0068] Here, in this embodiment, the core bit drilling bit 31a has, for example, an outer diameter of 110 mm, a wall thickness of 10 mm, and an inner diameter of 90 mm. Therefore, by moving the slide boom section 13 100 mm at a time toward the rear end in the forward / backward direction X, it is possible to form a linear through groove 53 by a line cut method in which a plurality of vertical cutting holes 52 are drilled in succession while securing a lap of 10 mm, and it is also possible to cut the floor hardened body 51 made of residual iron.

[0069] The slide rail section 16 is laid in the base section 11 in a region between the driver's cab 42 and the pair of front outrigger sections 12, 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. With this, while extending the outrigger sections 12 and leaving the vertical cut hole consecutive drilling device 10 installed at a predetermined position on the cutting line, it becomes possible to continuously form ten vertical cut holes 52 by moving the slide boom section 13 connected to the drilling device main body 30 along the slide rail section 16, for example, by 100 mm at a time, toward the rear end side in the forward / backward direction X, without moving the vertical cut hole consecutive drilling device 10.

[0070] With the outrigger section 12 extended and the vertical cut hole consecutive drilling device 10 installed at a predetermined position on the cutting line, the same operations as described above are repeated to form preferably ten 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, and the drilling device 10 is made movable via the moving mechanism 40. Thereafter, the vertical cut hole consecutive drilling device 10 is moved to the next construction location on the cutting line and reinstalled, and the same operations are repeated, making it possible to subsequently form a through groove 53 with a plurality of vertical cut holes 52 by the line cut method.

[0071] As a result, in this embodiment, the method for drilling consecutive vertical cut holes using the vertical cut hole consecutive drilling device 10 includes a first step of moving the vertical cut hole consecutive drilling device 10 by the moving mechanism 40 to a predetermined position on the floor hardened body 51 (for example, in the case where a previously drilled through groove 53 is present, to a position continuous with the vertical cut hole 52 at the rear end thereof), a second step of fixing the vertical cut hole consecutive drilling device 10 on the floor hardened body 51 by extending the outrigger section 12 toward the floor hardened body 51 and grounding it on the solid substance 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 section 13 back and forth toward the tip end or rear end side of the slide rail section 16.

[0072] In addition, in the vertical cut 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 body 30 is moved to a predetermined position above the floor hardened body 51, in a fourth step, the drilling device body 30 is used to drill and form a vertical cut hole 52 in the floor hardened body 51, in a 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 cut hole 52 that has been drilled, and the drilling device body 30 is positioned so that the next vertical cut hole 52 is consecutively formed to the vertical cut hole 52 that has been drilled, and in a seventh step, the drilling device body 30 is used to drill and form the next vertical cut hole 52 in the floor hardened body 51. 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 cut hole consecutive drilling device 10 in the first step.

[0073] Furthermore, in the vertical cut hole consecutive drilling method of this embodiment, the third step can also be made to execute an eighth step of drilling a vertical cut hole 52 in the floor hardened body 51 using the drilling device main body 30, a ninth step of moving the slide boom section 13 toward the tip side of the slide rail section 16 a distance corresponding to the diameter of the drilled vertical cut hole 52, and positioning the drilling device main body 30 so that the next vertical cut hole 52 is connected to the drilled vertical cut hole 52, and a tenth step of drilling the next vertical cut hole 52 in the floor hardened body 51 using the drilling device main body 30.

[0074] Furthermore, in the vertical cut hole consecutive drilling method of this embodiment, the drilling device main 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. Therefore, it is also possible to carry out a step after the fourth step or the ninth step of adjusting the rotation and tilt of the drilling device main body 30 in the elevation direction so that the drilling device main body 30 can drill vertically into the floor hardened body 51.

[0075] In addition, in the vertical cutting hole continuous drilling method of this embodiment, the drilling device main body 30 is further provided with a drilling bit 31a for cutting the floor hardened body 51, and the drilling bit 31a is configured to cut the circumferential portion of the vertical cutting hole 52 to be drilled in the floor hardened body 51.Therefore, in the above-mentioned fourth or eighth step, after the vertical cutting hole 52 is drilled and formed, it is preferable to remove from the drilling bit 31a the residual pig iron that constitutes the floor hardened body 51, which has been cut by the drilling bit 31a and left in the drilling bit 31a.

[0076] In the method for drilling a series of vertical cut holes of this embodiment, the above-mentioned fifth to seventh steps or eighth to tenth steps can be repeated a number of times determined according to the total length of the slide rail portion 16 and the diameter of the vertical cut holes 52.

[0077] 7(a)-(e) are diagrams illustrating and explaining the operation procedure of the vertical cut hole consecutive drilling method using the vertical cut hole consecutive drilling device 10. As shown in FIG. 7(a), the vertical cut hole consecutive drilling device 10 is moved to a predetermined position above the floor hardened body 51 by the moving mechanism 40. That is, the moving mechanism 40 is driven to move the vertical cut hole consecutive drilling device 10 to the place where the vertical cut holes are to be drilled. At this time, the slide boom part 13 may be disposed at the tip position of the slide rail part 16, or may be disposed at another position.

[0078] As shown in FIG. 7(a), the outrigger parts 12 are extended toward the floor hardened body 51 and grounded on the floor hardened body 51, thereby fixing the vertical cut hole consecutive drilling device 10 onto the floor hardened body 51. That is, the outrigger parts 12 are extended until the ground plate parts 12c come into contact with the floor hardened body 51. The same operation is performed for all four outrigger parts 12. In this case, the extension amounts of the four outrigger parts 12 are adjusted so that the vertical cut hole consecutive 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 consecutive drilling device 10.

[0079] 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 on 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.

[0080] 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 also be adjusted so that the drilling device body 30 can drill holes perpendicular to the floor hardened body 51. The left-right rotation of the drilling device body 30 relative to the mounting plate 47 is 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.

[0081] As shown in Fig. 7(b), the drilling device main body 30 is moved by the moving mechanism 34 toward the floor hardened body 51 to drill a vertical 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. When the drilling device main body 30 is lowered by the moving mechanism 34 while rotating the drilling bit 31a, a vertical hole can be drilled in the floor hardened body 51.

[0082] 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, in a state where 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, causing it to fall from the drill bit 31a.

[0083] 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 cut hole, and the drilling device body 30 is positioned so that the next vertical cut hole is connected to the vertical cut hole that has been drilled. For example, if the diameter of the vertical cut hole that has already been drilled is 110 mm, the drilling device body 30 is positioned by retreating 100 mm, assuming that a lap of 10 mm is secured.

[0084] 7(b), the drilling device main body 30 is used to drill the next vertical hole in the bed hardened body 51. That is, the drilling device main body 30 is lowered by the moving mechanism 34 to drill the next vertical hole.

[0085] In FIG. 7(e), the operations (b) to (d) are repeated a predetermined number of times. In the above description, the vertical cut holes are drilled while the slide boom section 13 is moved backward toward the rear end side of the slide rail section 16, but the present invention is not limited to this. For example, the vertical cut holes may be drilled by moving the slide boom section 13 forward toward the tip end side of the slide rail section 16. After this, the outrigger section 12 is moved away from the floor hardened body 51 and moved to the next work position by the moving mechanism 40. When forming the vertical cut hole 52 in continuity with the previously formed through groove 53, the vertical cut hole continuous 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 drill 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 by about 1 m. After that, simply go back to the procedure in Figure 7(a) and perform the steps.

[0086] Furthermore, according to the vertical cutting hole consecutive drilling device 10 of this embodiment having the above-mentioned configuration, it is possible to form multiple vertical cutting holes 52, preferably consecutively in a straight line, in the floor hardened body 51, which is a solid substance made of residual iron, which is a hard material, in a stable, precise and efficient manner.

[0087] That is, the vertical cutting hole continuous drilling device 10 of this embodiment is composed of a base section 11 which can move over the floor hardened body 51, which is a solid substance, via a moving mechanism 40, an outrigger section 12 provided on the four corners of the base section 11, a slide boom section 13 which moves back and forth along the upper surface of the base section 11, a slide rail section 16 which 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 section 12. The slide boom section 13 is also composed of a base section 14 that is placed on the slide rail section 16, and a boom main body section 15 that is erected from the base section 14 as a continuous member and bent laterally via a bent section 15a so that the tip connecting section 15b to which the drilling device main body 30 is connected is positioned outside the area directly above the base section 14, and the drilling device main body 30 is connected to the tip connecting section 15b of the boom main body section 15 so that when the drilling rod 31 is erected vertically, the drilling bit 31a is positioned outside the rectangular area R formed by the outrigger section 12.

[0088] As a result, when drilling vertical cutting holes 52 into 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.Therefore, compared to conventional drilling devices which are prone to becoming unstable because the weight of heavy equipment is supported on the floor hardened body 51 only by the ground contact part of the moving mechanism such as a crawler, the balance between the weight of the vertical cutting hole series drilling device 10 and the load during drilling makes it possible to firmly and stably hold the drilling rod 31 upright vertically, and form the vertical cutting holes 52 vertically with high precision.

[0089] In addition, the boom main body 15 of the slide boom section 13 is erected in a curved state from the base plate 14 as one continuous member without any intervening rotary connection section or telescopic section, and therefore the overall shape is compact and simple, which makes it possible to directly and efficiently transmit the load from the drilling device main body 30 connected to the tip connection section 15b to the base plate 14. In addition, the base plate 14 of the slide boom section 13 moves along the slide rail section 16 attached to the base section 11 inside the area R surrounded by the outrigger sections 12 on all four sides, so that the load applied from the boom main body 15 can be distributed to all of the outrigger sections 12 on all four sides and efficiently transmitted, and the load can be supported in a more stable state by the floor hardened body 51 via the outrigger sections 12 on all four sides.

[0090] As a result, according to this embodiment, it is possible to effectively prevent the drilling device main body 30 and the drilling bit 31a from becoming misaligned, and it is also possible to avoid the generation of excessive tipping moment, and while holding the drilling device main body 30 and the drilling rod 31 vertically, it is possible to accurately drill holes in a stable state by arranging each of the multiple vertical cutting holes 52 in a straight line, preferably in series.

[0091] In addition, according to the vertical cut hole consecutive drilling device 10 of this embodiment, the slide fixing mechanism 25 is configured to include: a slide rail section 16 having 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 which can fix the slide boom section 13 at a predetermined position on the slide rail section 16 by means of a contact friction force by pressing a pressing section 18b provided to be capable of protruding from the base section 14 of the slide boom section 13 toward the slide rail section 16 against the slide rail section 16.

[0092] As a result, the base plate section 14 is placed on the slide rail section 16 with the slide plate surface section 14c to which the slide plate member 14b is attached as a placement surface, and the slide boom section 13 can smoothly slide along the slide rail section 16 while transmitting the load applied during drilling to the slide rail section 16 and the base section 11 to which it is attached in a stable state by surface contact with the slide rail section 16. In addition, by operating the stopper section 18, it is possible to fix the slide boom section 13 to each predetermined position of the slide rail section 16. As a result, it is possible to efficiently form a plurality of vertical cut holes 52 by connecting them in a straight line using the vertical cut hole connecting drilling device 10 while supporting a large load applied during drilling in a stable state by the weight of the heavy machine against the floor hardened body 51, which is a solid substance made of a hard material, without resetting the heavy machine.

[0093] Furthermore, according to this embodiment, once the vertical cut hole consecutive 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, thereby forming multiple (10 in this embodiment) vertical cut holes 52 in a continuous straight line, preferably without meandering. Therefore, there is no need to reinstall the drilling device 10 for each vertical cut hole 52. For example, 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 can be reduced, making it possible to efficiently and quickly form a through groove 53 through multiple vertical cut holes 52.

[0094] Furthermore, 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 cutting, for example, and more efficiently form the through groove 53 by the multiple vertical cut holes 52. Since the core bit drill bit 31a drills while leaving a core part on the inside, it is possible to form the vertical cut hole 52 in the vertical direction with more precision using the inner core part as a guide.

[0095] 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 section in the forward and backward direction along the slide rail section 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 portion of the vertical cutting hole, and may be a drill bit that cuts the entire cross section of the vertical cutting hole. The solid bed hardened body in which the vertical cutting hole is formed by the vertical cutting hole series drilling device does not necessarily have to be a pig iron residue accumulated at the bottom of a blast furnace in a steelworks or a pig iron residue discharged from a blast furnace, and may be any other hardened bed body made of a hard material, such as reinforced concrete. The vertical cutting hole does not necessarily have to be one that is drilled through a solid material. In a method other than the line cut method for forming a through groove, when drilling vertical cut holes in a row, the vertical cut hole drilling device of the present invention can also be used. The vertical cut holes to be drilled do not necessarily have to be formed in a linear row, and for example, by installing a sliding fixing mechanism in two stages, one above the other, vertical cut holes can be formed in a row in any position or manner. [Explanation of symbols]

[0096] 10 Vertical cutting hole continuous drilling device (drilling device) 11 Base 12 Outrigger section 12c Ground plate part 13 Slide boom section (boom section) 14 Circuit Board 14a Rail locking placement part 14b Sliding plate member 14c Sliding plate surface portion (top surface portion of rail engaging and placing portion) 15 Boom main body 15a Bend section 15b Tip connection part 15c Curved Support Plate 15d Connection box section 16 Slide rail section 17 Telescopic Jack 18 Stopper part 18b Pressing part (stopper pin) 19 Hydraulic motor 19a Pinion member 20 Rack parts 25 Slide fixing mechanism 30 Drilling device body 31 Drilling Rod 31a Drilling bit (core bit) 32 Vertical base section 33 Rotation drive unit 34 Moving mechanism 40 Moving mechanism 41 Crawler-type running device 42 Cab 43 Control Panel 44 Mounting support 45 Vertical guide plate part 46 Rotating joint plate 47 Mounting plate part 48 Swing Jack 49 Vertical Jack 50 blast furnace 51 Hardened floor material (solid material) 52 Vertical cutting hole 53 Through groove R: A rectangular area enclosed by the outrigger section 12 X forward / backward direction Y Width direction C Center line of board width

Claims

1. 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.

2. The vertical cut hole consecutive drilling device according to claim 1, wherein the drilling device main body is connected to the tip connecting portion of the boom main body so as to be rotatable in the elevation direction, and the drilling rod can be switched from a tilted state to a vertically upright state by driving an extension jack that connects a portion of the drilling device main body above the tip connecting portion and a portion of the boom main body below the tip connecting portion.

3. 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.

4. 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 support surface of a support portion placed on the slide rail portion.

5. 5. The vertical cutting hole consecutive drilling device according to claim 3 or 4, wherein the stopper portion includes a hydraulic cylinder fixed to a base plate portion of the slide boom portion, and the pressing portion is inserted into an advance / retreat through hole formed through the base plate portion and is capable of protruding from the base plate portion toward the slide rail portion by operation of the hydraulic cylinder.

6. 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 / backward direction, is arranged in a pair in parallel, and is fixed to the upper surface of the base portion.

7. 7. The vertical cut hole continuous drilling device according to claim 6, further comprising an advancing / retracting mechanism for moving said slide boom section in an advancing / retracting direction, said mechanism being provided in an area between a pair of said parallelly arranged slide rail sections.

8. The vertical cut hole continuous drilling device as described in claim 7, wherein the advance / retract movement mechanism includes a rack member extending in the advance / retract direction and attached to the widthwise central portion of the area between the pair of slide rail portions on the upper surface of the base portion, and a pinion member attached to a hydraulic motor fixed to a base plate portion of the slide boom portion and arranged to protrude below the base plate portion.

9. The moving mechanism is a traveling device using a pair of endless tracks arranged on both sides of the base portion, and the slide rail portion is arranged extending parallel to the endless tracks of the traveling device. A vertical cutting hole continuous drilling device according to any one of claims 1 to 8.

10. A vertical cutting hole continuous drilling device as described in any one of claims 1 to 9, wherein the drilling bit attached to the lower end of the drilling rod is a drilling bit using a core bit that cuts the circumferential portion of the vertical cutting hole.

11. The vertical cutting hole continuous drilling device according to any one of claims 1 to 10, wherein the solid material is a residual pig iron discharged from a blast furnace in a steelworks.

12. 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 or backward toward the front end or rear end of the slide rail section; A method for drilling continuous vertical cut holes, comprising:

13. 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:

14. 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:

15. 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.

16. 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.

17. 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.

18. The drilling device body is further connected to the slide boom section so as to be rotatable in the 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.

19. The drilling device body further includes a drilling bit for cutting the solid material, the drilling 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.

20. A method for drilling consecutive vertical cut holes as described in claim 14, wherein steps 8 to 10 are repeated a number of times determined according to the total length of the slide rail portion and the diameter of the vertical cut holes.

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