Vertical hole punching device

Abstract

To provide a vertical hole boring device that can form vertical holes such as vertical cut holes in a cured floor composed of a hard material in a stable manner with accuracy and efficiency and can be also easily made compact in a size.SOLUTION: A vertical hole boring device includes a base part 11 movable on a solid substance 51, a boom part 13 and a boring device body 30. The boom part 13 includes a boom body part 15 erected from a substrate part 14. The boom body part 15 includes a curving support plate 15c that is bent so as to approach the boring device body 30, causing a tip connection part 15b for connection to the boring device body 30 to be disposed in front of an edge of a base end 150. The curving support plate 15c extends from the tip connection part 15b to the base end 150 and is formed as a continuous member without a rotation connector or an expander interposed therebetween. The boring device body 30 is rotatably connected to the tip connection part 15b of the curving support plate and can change a boring rod 31 in a tilted state to a vertically erected state.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a vertical hole drilling apparatus, and more particularly to a vertical hole drilling apparatus for drilling vertical holes. [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 cutting groove with multiple vertical cut holes that reach the bottom of the residual pig iron, while being connected 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, conventional devices for forming vertical cut holes, preferably used in the above-mentioned line cut method, have typically been equipped with long booms and arms equipped with rotating connectors and telescopic parts, since devices using drill bits for drilling blast holes in the rock in the horizontal direction, such as in mountain tunnel construction, have been used. Therefore, since the booms and arms are not continuous members without rotating connectors or telescopic parts, it is difficult to reduce the size of the devices, and there is room for improvement in terms of workability in narrow blast furnaces, for example.

[0008] Furthermore, when drilling vertical cut holes in solid material that is left on the floor of a blast furnace as a hardened floor body, for example, formed from residual pig iron lumps, which are harder and stronger than bedrock, the large load applied during drilling cannot be stably supported by the contact parts of the surrounding hardened floor body by the moving mechanism, such as crawlers, of the heavy machinery equipped with the drilling device, and the load tends to become unstable, making it difficult to form the vertical cut holes with 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 equipped with a fixing means to be inserted into a previously formed vertical cutting 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 cutting holes in the hard floor hardened body, and the heavy machine (crawler) needs to be reset each time a vertical cutting hole is formed, so that the movement and installation take time, making it difficult to efficiently form multiple vertical cutting holes, preferably connected together in a straight line.

[0009] An object of the present invention is to provide a vertical hole drilling device that can form vertical holes such as vertical cutting holes in solid substances made of hard materials in a stable, accurate and efficient state, and that can easily be made compact and can improve workability, for example, in a narrow blast furnace. [Means for solving the problem]

[0010] The present invention provides a vertical hole drilling device for drilling vertical holes in a solid material, the device comprising: a base portion movable over the solid material via a moving mechanism; a slide boom section supported by the base section and movable back and forth along an upper surface of the base section; and a punching device body attached to the tip of the punching device. and further includes outrigger sections provided at the four corners of the base section, and a slide rail section installed on the base section for guiding the forward and backward movement of the slide boom section. The slide boom section includes a base section slidably placed on the slide rail section, and the base sectionand a boom main body portion standing upright from the base end portion, the boom main body portion being bent in a direction approaching the drilling device main body, the boom main body portion being provided with a curved support plate for positioning a tip connecting portion to which the drilling device main body is connected forward of an end portion of the base end portion connected to the base portion that is on the drilling device main body side, the curved support plate being formed as a continuous member from the tip connecting portion to the base end portion without an intervening rotary connecting portion or an extendable portion, and the width in a side view increasing from the tip connecting portion side toward the base end portion, The slide rail portion is configured to slide and move the base portion of the slide boom portion within a rectangular area surrounded by the outrigger portions on all four sides of the base portion, The above-mentioned objective has been achieved by providing a vertical hole drilling device in which the drilling device main body is rotatably connected to the tip connecting portion of the curved support plate in an elevation and depression direction, and the drilling rod can be switched from a tilted state to a vertically upright state.

[0011] The vertical hole drilling apparatus of the present invention is preferably capable of adjusting the horizontal position and angle of the vertical cut holes drilled in the solid material.

[0012] The vertical hole drilling device of the present invention comprises: The slide rail portion is disposed and laid in a region of the base portion between a driver's cab and a pair of the front outrigger portions. It is preferred.

[0013] The vertical hole drilling device of the present invention comprises: The boom body However, it is preferable that the curved support plate has a plurality of the curved support plates and a reinforcing steel plate connecting the curved support plates, and that each of the curved support plates has a bent portion whose outer periphery and inner periphery are each arc-shaped.

[0014] It is preferable that the vertical hole drilling device of the present invention comprises a pair of curved support plates, a connecting box portion is formed to connect the pair of curved support plates together, and a cylindrical or columnar reinforcement body having both ends fixed to the pair of curved support plates. Effect of the Invention

[0015] According to the vertical hole drilling device of the present invention, vertical holes such as vertical cutting holes can be formed stably, accurately and efficiently in solid substances made of hard materials, and the device can be easily made compact, which can improve workability, for example, in a narrow blast furnace. [Brief description of the drawings]

[0016] [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] FIG. 2 is a perspective view showing details of a slide boom section in the vertical cut hole continuous drilling device. [Figure 8] 1 is an oblique view showing a mechanism for switching the slide boom section (boom section) and the drilling rod of the drilling device body in a vertical cut hole continuous drilling device from a tilted state to a vertically upright state. FIG. [Figure 9] FIG. 2(a) is a front view and FIG. 2(b) is a rear view of the boom body of the vertical cut hole continuous drilling device. [Figure 10] 1A is a plan view of the boom body of the vertical cut hole continuous drilling device, and FIG. [Figure 11]1A is a right side view and FIG. 1B is a left side view of the boom body of the vertical cut hole continuous drilling device. [Figure 12] 9(a) is a perspective view of a boom body in a vertical cut hole continuous drilling device, and FIG. 9(b) is a cross-sectional view taken along line AA in FIG. 9(a). [Figure 13] 11(a) is a cross-sectional view taken along line BB in FIG. 11(a) of the boom body of the vertical cut hole continuous drilling device, and FIG. 11(b) is a reference diagram showing the state of use. [Figure 14] FIG. 2 is an overall reference diagram showing the use state of the boom main body in the vertical cut hole consecutive drilling device. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] 1 and 2 show a vertical cut hole series drilling device 10 according to a preferred embodiment of the vertical hole drilling device of the present invention. The vertical cut hole series drilling device 10 according to this embodiment is used in a line cut construction method for cutting 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 in a linear manner 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, for example, in a steelworks, as shown in FIG. 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 bed hardened body 51, for example, in order to form a plurality of vertical cut holes 52 constituting a through groove 53 by connecting them preferably linearly in the bed hardened body 51, which is a hard solid material having a considerable strength. The vertical cut hole series drilling device 10 of this embodiment has the function of enabling a plurality of vertical cut holes 52 to be formed, for example, in residual pig iron forming a hard floor hardened body 51, accurately and efficiently, preferably by easily adjusting the horizontal position and angle, penetrating the holes vertically as through holes, for example, and preferably connecting the holes in a straight line in a stable state.

[0018] The vertical cut hole consecutive drilling device 10 of this embodiment is a drilling device for forming a plurality of vertical cut holes 52, which are drilled as vertical holes in the bed hardened body 51 made of, for example, residual iron, preferably in a linear manner. As shown in Figs. 1 and 2, the vertical cut hole consecutive drilling device 10 of this embodiment includes a base unit 11 that can move over the bed hardened body 51 via a moving mechanism 40, a boom unit 13 attached to the base unit 11, and a drilling device body 30 attached to the tip of the boom unit 13. The boom unit 13 includes a base unit 14 attached to the base unit 11 and a boom body unit 15 that stands upright from the base unit 14. As shown in Figs. 4(a) and 7, the boom body 15 is bent in a direction approaching the drilling device body 30, so that the tip connecting portion 15b to which the drilling device body 30 is connected is provided with a curved support plate 15c arranged forward of the end portion 151 on the drilling device body 30 side at the base end 150 connected to the base plate 14. The curved support plate 15c is formed as a continuous member from the tip connecting portion 15b to the base end 150 connected to the base plate 14 without interposing a rotating connecting portion or an expanding portion. The width W of the curved support plate 15c in a side view increases from the tip connecting portion side 15b toward the base end 150 connected to the base plate 14. The base end 150 of the curved support plate 15c is a portion where the bottom portion of the curved support plate 15c described later is joined to the base plate 14 by welding.

[0019] In addition, in this embodiment, the drilling device main body 30 is preferably connected to the tip connecting portion 15b of the boom main body 15 of the slide boom section 13, more specifically, the tip connecting portion 15b provided on the curved support plate 15c, so as to be rotatable in the elevation direction, via an attachment support portion 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 portion 15b of the attachment support portion 44 that constitutes the drilling device main body 30 and the portion below the tip connecting portion 15b of the boom main body 15, the drilling rod 31 of the drilling device main body 30 can be switched from a tilted state to a vertically upright state.

[0020] The vertical cut hole series drilling device 10 is preferably a vertical cut hole series drilling device used to form multiple vertical cut holes 52 connected in a straight line in a floor hardened body 51, and is equipped with the aforementioned boom section 13, which is supported by the base section 11 and moves back and forth along the upper surface of the base section 11. More specifically, the vertical cut hole series drilling device 10 further comprises the aforementioned base portion 11, outrigger portions 12 provided at the four corners of the base portion 11, the aforementioned slide boom portion 13, and a slide rail portion 16 installed on the base portion 11 for guiding the forward and backward movement of the slide boom portion 13, and the drilling device main body 30 is attached to the tip of the slide boom portion 13.

[0021] The slide rail section 16 is provided so as to move the base section 14 of the slide boom section 13 inside the quadrangular region R surrounded by the outrigger sections 12 of the base section 11. The slide boom section 13 includes the base section 14 slidably placed on the slide rail section 16, and the boom body section 15 which is erected from the base section 14 as a continuous member without any intervening rotary connection section or telescopic section, and which is preferably bent laterally via a curved bent section 15a, so that the tip connection section 15b to which the drilling device body 30 is connected is located outside the region 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 the drilling bit 31a at the lower end is located outside the quadrangular region R surrounded by the outrigger sections 12 when the drilling rod 31 of the drilling device body 30 is erected vertically.

[0022] 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 provided 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 cutting groove 53 of the vertical cut hole 52 in the bed hardened body 51 with the outrigger part 12 not touching the ground.

[0023] 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.

[0024] The outrigger section 12 is configured to include a known telescopic mechanism having a cylinder section 12a, a piston rod section 12b, and a ground 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, and the ground plate section 12c attached to the lower end of the piston rod section 12b can be grounded so as to press against the upper surface of the floor hardened body 51 to obtain a 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 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 at the time of drilling, which is transmitted via the slide boom section 13, can be supported in a stable state by the weight of the drilling device 10.

[0025] The boom section 13 (slide boom section 13) in this embodiment is configured to include a base plate section 14 and a boom main body section 15. As shown in Figs. 4(a), (b) and 5(a), (b), 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 in a stable state as it is to the base plate section 14 for support. The base plate section 14 is attached directly or indirectly on the base section 11, and transmits the load transmitted to the base plate section 14 in a stable state as it is to the base section 11 for support. The boom section 13 in this embodiment is a slide boom section 13 that moves back and forth along the upper surface section of the base section 11, and the base section 14 is the part that serves as the sliding section when the slide boom section 13 moves back and forth in the forward and backward direction X, and also transmits the load transmitted to the base section 14 to the base section 11 while being fixed on the slide rail section 16 for support.

[0026] The boom body 15 in this embodiment includes a pair of curved support plates 15c with tip connectors 15b to which the drilling device body 30 is connected. The curved support plates 15c are bent in a direction approaching the drilling device body 30, so that the tip connectors 15b to which the drilling device body 30 is connected are disposed forward of an end 151 on the drilling device body 30 side of a base end 150 connected to the base plate 14. The direction approaching the drilling device body 30 is the leftward direction in FIG. 5, and forward in the forward / backward direction X. The end 151 on the drilling device main body 30 side is the end in the direction approaching the drilling device main body 30 (left direction in FIG. 5). In this embodiment, the base plate portion 14 extends from the end 151 on the drilling device main body 30 side of the curved support plate 15c in the direction approaching the drilling device main body 30 (left direction in FIG. 5). It is preferable that the boom main body portion 15 is configured so that the tip connecting portion 15b to which the drilling device main body 30 is connected is located outside the area directly above the base plate portion 14. The outside of the area directly above the base plate portion 14 is forward of the end 141 on the drilling device main body 30 side of the base plate portion 14.

[0027] In this embodiment, the boom main body 15 includes a plurality of curved support plates 15c, and also includes a steel plate 153 that connects the curved support plates 15c, 15c. More specifically, the boom main body 15 includes a pair of curved support plates 15c that are symmetrically arranged on both sides of the widthwise center line C of the base plate 14, and a connecting box portion 15d made of a steel plate 153 that is arranged in a space between the curved support plates 15c and integrally connects 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. The curved support plate 15c is formed as a continuous member from the tip connecting portion 15b to the base end portion 150 without any intervening rotary connecting portion or expandable portion, and as shown in FIG. 4(a), the width W in a side view increases from the tip connecting portion 15b side toward the base end portion 150 side. The curved support plate 15c also has a curved bent portion 15a in which the outer peripheral portion 154 and the inner peripheral portion 155 each form an arc shape, and more specifically, the curved support plate 15c is substantially entirely curved bent portion 15a. Here, the "arc shape" is not limited to the shape of an arc part of a perfect circle, but includes, for example, an arc part of an ellipse and shapes similar to these arcs.

[0028] In this embodiment, each curved support plate 15c has a curved side shape surrounded by a straight bottom portion joined to the substrate portion 14, an approximately quarter-circular arc shaped outer peripheral portion 154, an approximately quarter-circular arc shaped inner peripheral portion 155 having a smaller radius of curvature than the outer peripheral portion, and a semicircular tip edge portion 156 at the tip, and the width W in the direction perpendicular to the curvature direction smoothly and gradually narrows from the substrate portion 14 toward the tip connecting portion 15b.

[0029] The connecting box portion 15d is made of a steel plate 153 having a thickness of, for example, about 40 to 50 mm, similar to that of the curved support plate 15c, and is machined to have a curved, hollow, three-dimensional shape consisting of an outer peripheral surface portion 157 that is curved with a radius of curvature slightly smaller than that of the outer peripheral portion 154 of the curved support plate 15c, an inner peripheral surface portion 158 that is curved with a radius of curvature slightly larger than that of the inner peripheral portion 155 of the curved support plate 15c, and a vertical end surface portion 159 that extends vertically in front of the semicircular tip edge portion 156 of the curved support plate 15c and connects the outer peripheral surface portion 157 and the inner peripheral surface portion 158. The connecting box portion 15d is attached so that the curved support plates 15c are firmly connected as a single unit by joining both side end faces to the inner surfaces of the pair of curved support plates 15c via welding or the like, with the outer surface portion aligned along the outer peripheral portion of the curved support plate 15c and the inner surface portion aligned along the inner peripheral portion of the curved support plate 15c, thereby forming a hollow box shape in the portion between them.

[0030] 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.

[0031] 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.

[0032] 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 body 15, penetrating the hollow interior of the connection box part 15d and attached with both ends open to each curved support plate 15c. The steel pipe member 15g is an example of a columnar reinforcement body in the present invention, and a solid cylindrical steel material can be used as the columnar reinforcement body instead of or in addition to the steel pipe member 15g. By installing a columnar reinforcement body such as the steel pipe member 15g between the curved support plates 15c of the boom body 15 and attaching it, the columnar reinforcement body functions as a reinforcing rib for the left and right curved support plates 15c, and it becomes possible to effectively prevent the boom body 15 from easily being twisted by a large unbalanced load applied.

[0033] 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 described above 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 key shape so as to have a U-shaped cross section, thereby forming rail engagement placement portions 14a that are placed on the pair of slide rail sections 16 in a state where they are engaged with the pair of slide rail sections 16 so as to embrace them from the outside (see Figs. 4(b) and 6(a)). On the inner surface of the rail engagement placement portion 14a, a sliding plate member 14b, which is a plate-shaped self-lubricating bearing known as a sliding bearing and is, for example, a product name "OILES BEARING" (manufactured by Oiles Corporation), is attached integrally via metal fittings to three surfaces, the top surface serving as the placement surface, the side surface, and the bottom surface (see FIG. 6(a)). By placing the base plate portion 14 on the slide rail portion 16 with the top surface to which the sliding plate member 14b is attached as the placement surface, the slide boom portion 13 can smoothly slide along the slide rail portion 16 while transmitting the load applied during drilling to the slide rail portion 16 and the base portion 11 to which it is attached in a stable state by surface contact with the slide rail portion 16.

[0034] 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 in the width direction Y. The stopper portion 18 is composed of a hydraulic cylinder 18a fixed to the base plate portion 14 and a stopper pin 18b that moves up and down 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 at a portion 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 contact frictional force, thereby firmly holding 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 place the slide boom portion 13 in a state in which it can slide along the slide rail portion 16.

[0035] 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 center line C in the width direction 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 so as to be sandwiched between 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.

[0036] 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.

[0037] 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.

[0038] In addition, in this embodiment, a reinforcing rib plate 16d having a right-angled triangular shape is joined and fixed at multiple points at predetermined intervals in the forward / backward direction X, for example by welding the oblique sides on both sides to the outer surfaces or the upper surface of the base portion 11, so as to straddle the outer surface of one side portion 16a of each slide rail portion 16 and the upper surface of the base portion 11 (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.

[0039] 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 region 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 region 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 region R surrounded by the four outrigger parts 12 when the drilling rod 31 of the drilling device main body 30 is vertically erected.

[0040] 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 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.

[0041] 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.

[0042] 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 in the elevation direction 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.

[0043] 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 horizontally with high precision by only extending and retracting the outrigger parts 12. By providing the mounting support part 44, the drilling device body 30 can be connected to the boom body part 15 of the slide boom part 13 so that it can rotate in the elevation direction, and the mounting support part 44 can move up and down and swing the drilling device body 30 so that the drilling rod 31 stands vertically and the height position of the tip of the drilling bit 31a can be easily adjusted with high precision so that it is aligned with a predetermined cutting line. In addition, while keeping the drilling rod 31 precisely positioned vertically, by moving the slide boom section 13 along the slide rail section 16, the drilling rod 31 and the drilling bit 31a can be precisely moved in the forward / backward direction X along a predetermined cutting line.

[0044] 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 forward and backward 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 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 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 can be supported by the slide boom part 13 together with the mounting support part 44 so as to be rotatable in the elevation direction.

[0045] 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 Figures 4(a) and 8), the drilling rod 31 of the drilling device main body 30 can be switched from a tilted state to a vertically upright state.

[0046] 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.

[0047] 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.

[0048] 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.

[0049] To cut a floor hardened body 51 (see Figure 3) made of residual iron by using the vertical cut hole series drilling device 10 of this embodiment having the above-mentioned configuration to drill a plurality of vertical cut holes 52 in a linear manner along a predetermined cutting line by a line cut method, the drilling device body 30, which is 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 so as to be rotatable in the elevation direction, 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.

[0050] 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.

[0051] 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. On the surface of the bed hardened body 51 made of uneven residual iron, it is difficult to move the drilling device 10 slightly or ensure the verticality of the drilling rod 31 each time using the moving mechanism 40 with the crawler-type traveling device 41 of the vertical cutting hole continuous drilling device 10. However, as described above, by providing a mechanism that can adjust the horizontal position and angle of the vertical cutting hole 52 to be drilled, it is possible to form the vertical cutting hole 52 more accurately and efficiently.

[0052] 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, and the drilling bit 31a vertically drills and forms a vertical cutting hole 52 in the bed hardened body 51 made of residual pig iron while being cooled by water or air as necessary. 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 driver's cab 42 or control panel 43, and if these measured values ​​become too high, the drilling speed is controlled, for example, by slowing down. 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.

[0053] 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 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 in the hole and pull it out.

[0054] Preferably, after removing the core from the drill rod 31 and the drill bit 31a, the drill 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 cut and form the next vertical cut hole 52.

[0055] 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 cutting groove 53 by a line cutting 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 pig iron.

[0056] 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 section 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, preferably connected in a straight line, by moving the slide boom section 13 connected to the drilling device main body 30, for example, by 100 mm at a time along the slide rail section 16 toward the rear end side in the forward / backward direction X, without moving the vertical cut hole consecutive drilling device 10.

[0057] 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 cutting grooves 53 by a plurality of vertical cut holes 52 by the line cut method.

[0058] Furthermore, according to the vertical cut hole consecutive drilling device 10 of this embodiment having the above-mentioned configuration, it is possible to form multiple vertical cut holes 52 consecutively in a straight line in the solid substance 51 made of residual pig iron, which is a hard material, in a stable, accurate and efficient manner.

[0059] The vertical cut hole continuous drilling device 10 of this embodiment is configured to include a base section 11 that can move over a floor hardened body 51, which is a solid material, via a moving mechanism 40, a boom section 13 attached to the base section 11, and a drilling device main body 30 attached to the tip of the boom section 13. The boom section 13 is configured to include a base section 14 attached to the base section 11 and a boom main body section 15 that stands upright from the base section 14. The boom main body section 15 is bent in a direction approaching the drilling device main body 30, so that a tip connecting section 15b to which the drilling device main body 30 is connected is bent toward the base section 14 connected to the base section 14. The drilling device body 30 is provided with a curved support plate 15c which is positioned forward of the end 151 on the drilling device body 30 side at the end 150, and the curved support plate 15c is formed as a continuous single member from the tip connecting portion 15b to the base end 150 without any intervening rotary connecting portion or extendable portion, and the width W in a side view increases from the tip connecting portion 15b side toward the base end 150 side, and the drilling device body 30 is rotatably connected to the tip connecting portion 15b of the curved support plate in an elevation and depression direction, and the drilling rod 31 can be switched from a tilted state to a vertically upright state.

[0060] According to the vertical cut hole continuous drilling device 10 (vertical hole drilling device) of this embodiment, the boom body 15 is configured to include the curved support plate 15c of the above-mentioned form, and the tip connecting part 15b of the curved support plate 15c forms the tip connecting part 15b of the boom body 15, so that the overall shape of the boom body 15 is compact and simple. In addition, the boom body 15 of this form can directly and efficiently transmit the load from the drilling device body 30 connected to the tip connecting part 15b to the base part 14 and the base part 11, and can support it in a stable state on the floor hardened body 51. As a result, according to this embodiment, vertical holes such as vertical cut holes can be formed in the floor hardened body 51 made of a hard material in a stable, accurate and efficient state, and the equipment can be easily miniaturized, which can improve workability in a narrow blast furnace, for example. In addition, since the curved support plate 15c is a single continuous member from the tip connecting portion 15b to the base end portion 150 without any intervening rotary connecting portion or telescopic portion, it is difficult to reduce the size of conventional booms and arms that are equipped with rotary connecting portions or telescopic portions and become bent or long, and compared to conventional devices that have room for improvement in terms of workability in a narrow blast furnace, for example, it is possible to effectively prevent the drilling device main body 30 and the drilling bit 31a from shifting position, and it is possible to avoid the occurrence of excessive tipping moment and accurately drill and form each of the multiple vertical cutting holes 52, etc. in the desired arrangement while holding the drilling device main body 30 and the drilling rod 31 vertically. It is preferable that the width W2 of the base end 150 of the curved support plate 15c is about two to three times the width W1 of the tip connecting portion side 15b.

[0061] In the vertical cut hole continuous drilling device 10 of this embodiment, the boom section 13 is a slide boom section 13 that is supported by the base section 11 and moves back and forth along the upper surface of the base section. As a result, 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 straight line in succession 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 form cutting grooves 53 through multiple vertical cut holes 52.

[0062] In addition, the vertical cutting hole continuous drilling device 10 of this embodiment is equipped with outrigger sections 12 provided at the four corners of the base section, and the boom main body section 15 is attached to the base section 11 so that the base end section 150 of the curved support plate 15c is positioned inside the rectangular area surrounded by the outrigger sections 12. As a result, according to the vertical cutting hole consecutive drilling device 10 of this embodiment, 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 consecutive drilling device 10 can be supported in a stable state 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 mainly by the ground contact part of the moving mechanism such as a crawler, it is possible to firmly hold the drilling rod 31 in a vertically upright position by balancing the weight of the vertical cutting hole consecutive drilling device 10 and the load during drilling, and to form the vertical cutting holes 52 precisely and vertically.

[0063] In addition, in this embodiment, the boom main body 15 is equipped with a plurality of curved support plates 15c and a steel plate 153 connecting the curved support plates 15c, and each of the curved support plates 15c is equipped with a bent portion 15a whose outer peripheral portion 154 and inner peripheral portion 155 each form an arc shape. As a result, according to this embodiment, compared to conventional devices such as the boom and arm of a backhoe, which have a clear bend due to a rotating connection and therefore tend to concentrate stress at the bend, it is possible to suppress stress concentration in one part of the curved support plate 15c, and the boom main body 15 can more efficiently transmit the load from the drilling device main body 30 connected to the tip connecting part 15b to the base plate part 14 and the base part 11, allowing the floor hardened body 51 to support it in a stably state.

[0064] 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, the diameter of the vertical cut hole 52 can be increased. This reduces the number of vertical cut holes 52 for line cutting, making it possible to more efficiently form the cutting 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 becomes possible to form the vertical cut hole 52 in the vertical direction with more precision using the inner core part as a guide.

[0065] 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 caterpillar tracks, and may be any other known moving mechanism used in heavy construction machinery. The slide mechanism for moving the slide boom section back and forth along the slide rail section does not necessarily have to be a mechanism using a pinion member and a rack member, and may be any other known slide 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 material in which the vertical cutting hole is formed by the vertical cutting hole series drilling device does not necessarily have to be the residual pig iron discharged from the blast furnace in the steelworks, and may be any other solid material made of a hard material, such as reinforced concrete.

[0066] The boom body may include one curved support plate or three or more curved support plates. The boom body may include a plurality of curved support plates (for example, two to twenty) stacked together without any gaps. In the above-described embodiment, the width W of the curved support plate gradually increases from the tip connecting portion side toward the base end side, but the width W may be increased intermittently at one or more points. The boom section 13 may be fixed such that the base plate section 14 cannot slide on the base section 11.

[0067] The appearance of the boom section 13 in the vertical cut hole consecutive drilling device 10 of this embodiment, particularly the portion shown by solid lines in Figures 9 to 13, is excellent in terms of design. Figures 9 to 14 are views showing the boom section 13 of this embodiment with specific dimensions and shapes. In Figures 9 to 13, the part indicated by solid lines is the part that would be the "part for which a design registration is sought as a partial design" if the boom part 13 were to be applied for as a partial design, and the part indicated by dotted lines is the "part other than the part for which a design registration is sought as a partial design." The article relating to the design in this case (hereinafter also referred to as "the article") is the boom part of a vertical hole drilling device (residual iron drilling machine), and is used by directly or indirectly attaching the drilling machine body to the tip connector in a rotatable manner, as shown in the overall reference drawing showing the state of use (see Figure 14), and as shown in the overall reference drawing showing the state of use, the article is slidably attached to a slide rail installed on a chassis equipped with a caterpillar-type moving mechanism. It is also preferable that the present article has a telescopic jack disposed between a portion of the drilling machine body located above the tip connecting portion and a portion of the present article located below the tip connecting portion, and that by driving the telescopic jack, the drilling rod provided in the drilling machine body can be switched from a tilted state to a vertically upright state. 9(a) is a front view, and (b) is a rear view. FIG. 10 is (a) a plan view and (b) a bottom view of the article shown in FIG. 9. FIG. 11 is (a) a right side view and (b) a left side view of the article shown in FIG. 9. FIG. 12 is (a) a perspective view and (b) a cross-sectional view along line AA of the article shown in FIG. 9. FIG. 13 is (a) a cross-sectional view along line BB of the article shown in FIG. 11, and (b) a reference view showing a state of use. FIG. 14 is an overall reference view showing a state of use of the article shown in FIG. 9. [Explanation of symbols]

[0068] 10 Vertical cutting hole continuous drilling device 11 Base 12 Outrigger section 12c Ground plate part 13 Boom section (slide boom section) 14 Circuit Board 14a Rail locking placement part 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 19 Hydraulic motor 19a Pinion member 20 Rack parts 30 Drilling device body 31 Drilling Rod 31a Drill 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 Cutting groove R: A rectangular area enclosed by the outrigger section 12 X forward / backward direction Y Width direction C: Center line in the width direction of the substrate portion 14

Claims

1. 1. A vertical hole drilling apparatus for drilling vertical 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, a slide boom section that is supported by the base section and moves back and forth along the upper surface of the base section, and a drilling device main body attached to the tip of the slide boom section, and further includes outrigger sections provided at the four corners of the base section, and a slide rail section installed on the base section that guides the forward and backward movement of the slide boom section, The slide boom section includes a base section slidably placed on the slide rail section, and a boom main body section standing upright on the base section, the boom body portion is provided with a curved support plate that is curved in a direction approaching the drilling device body, thereby positioning a tip connection portion to which the drilling device body is connected forward of an end portion of a base end portion connected to the base plate portion that is on the side of the drilling device body, The curved support plate is formed as a continuous member from the tip connecting portion to the base end portion without any intervening rotary connecting portion or expandable portion, and the width in a side view increases from the tip connecting portion side to the base end side, The slide rail portion is configured to slide and move the base plate portion of the slide boom portion inside a rectangular area surrounded by the outrigger portions on all four sides of the base portion, The vertical hole drilling device, wherein the drilling device body is rotatably connected to the tip connecting portion of the curved support plate in an elevation direction, and the drilling rod can be switched from a tilted state to a vertically upright state.

2. 2. The vertical hole drilling apparatus of claim 1, wherein the horizontal position and angle of the vertical drilled hole drilled in the solid material is adjustable.

3. A vertical hole drilling device as described in claim 1 or 2, wherein the slide rail portion is positioned and laid in the area of ​​the base portion between the driver's cab and a front pair of the outrigger portions.

4. A vertical hole drilling device as described in any one of claims 1 to 3, wherein the boom main body portion has a plurality of the curved support plates and a steel plate connecting the curved support plates, and each of the curved support plates has a bent portion whose outer periphery and inner periphery each form an arc shape.

5. The boom main body portion is provided with a pair of the curved support plates, and a connecting box portion is formed to connect the pair of curved support plates as a whole, and the boom main body portion is provided with a cylindrical or columnar columnar reinforcement body whose both ends are fixed to the pair of curved support plates. The vertical hole drilling device described in any one of claims 1 to 4.

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