Attachment for drilling device, method for fixing the attachment, and drilling system

Abstract

This provides an attachment that can be easily attached to the tip of a drilling device, facilitating the movement of the drilling device. [Solution] The attachment 20 is provided at the tip of the drilling device 10, which is suspended and supported by a wire, and is detachably attached to the support member 19. The attachment 20 comprises a plate-shaped base 21, a receiving portion 22 provided on one side of the base 21 that houses the support member 19 inside, a rolling element 25 provided on the other side of the base 21 that functions as a guide during movement, and a pair of plate-shaped bodies extending in a direction intersecting the plate surface of the base 21, and a guide member 23 that can be fitted onto a flange portion located at the tip of the drilling device.

Description

Technical Field

[0001] The present invention relates to an attachment that is installed or moved using a wire and attached to the tip of a drilling device that drills holes in high places such as slopes or places with poor scaffolds.

Background Art

[0002] Conventionally, in drilling operations in places where heavy machinery cannot directly enter, such as steep slopes in mountainous areas, a technique has been known in which a wire is stretched using standing trees or temporary supports, and a drilling device is suspended and supported in the air and moved (for example, see Patent Document 1). In this type of device, the drilling device is moved to the target position by operating a winch, and holes are drilled in a rock formation or the like.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In an actual field, when overcoming the unevenness of a slope or accurately aligning with a drilling point, it is often difficult to make fine adjustments only by wire operation. Currently, such fine adjustments and movement assistance are manually performed by workers. That is, in reality, the worker moves while lifting or supporting the tip of the heavy drilling device.

[0005] However, in a steep slope with a poor scaffold, the work of manually supporting and moving a heavy object places a great physical burden on the worker. In addition, working in a forced posture involves a risk of falling or slipping, so improvement has been strongly desired from the perspective of safety.

[0006] The present invention has been made in view of the above circumstances, and aims to provide an attachment that can be easily attached to the tip of a drilling device and facilitates the movement of the drilling device, a method for fixing the attachment, and a drilling system. [Means for solving the problem]

[0007] The attachment according to the present invention is provided at the tip of a drilling device suspended by a wire and is detachably attached to a support member that supports its own weight during drilling, and comprises a plate-shaped base, a receiving portion provided on one side of the base and housing the support member inside, a rolling element provided on the other side of the base and functioning as a guide during movement, and a guide member which is at least one pair of plate-shaped bodies extending in a direction intersecting the plate surface of the base and is fittable to a flange portion located at the tip of the drilling device.

[0008] The present invention provides a method for fixing an attachment to the tip of a drilling device suspended by a wire, and detachably attached to a support member that supports its own weight during drilling, the attachment comprising: a plate-shaped base; a receiving portion provided on one side of the base for housing the support member inside; rolling elements provided on the other side of the base for functioning as guides during movement; and a guide member consisting of at least one pair of plate-shaped bodies extending in a direction intersecting the plate surface of the base, which can be fitted onto a flange portion located at the tip of the drilling device, is a method for fixing the attachment to the tip of a drilling device suspended by a wire. This method includes the step of housing the support member of the drilling device in the receiving portion of the attachment and fitting the guide member onto the flange portion of the drilling device.

[0009] The drilling system according to the present invention comprises a drilling device suspended by a wire and an attachment detachably attached to the tip of the drilling device. The drilling device has a support member that supports its own weight during drilling and a flange portion located near the support member. The attachment has a plate-shaped base, a receiving portion provided on one side of the base that houses the support member inside, rolling elements provided on the other side of the base that function as guides during movement, and at least one pair of plate-shaped bodies extending in a direction intersecting the plate surface of the base, which are guide members that can be fitted to the flange portion. The support member is housed in the receiving portion and the guide members are fitted to the flange portion. [Effects of the Invention]

[0010] According to the attachment, attachment fixing method, and drilling system of the present invention, the attachment can be easily mounted by placing it over a support member at the tip of the drilling device, and the drilling device can be easily moved using rolling elements. [Brief explanation of the drawing]

[0011] [Figure 1] This is a perspective view showing the overall configuration of a drilling apparatus according to the first embodiment of the present invention. [Figure 2] This is a perspective view of the drilling device and attachment in their separated state. [Figure 3] This is a perspective view of an attachment that is mounted on the tip of a drilling device. [Figure 4] This is a perspective view of the attachment from a different angle. [Figure 5] This is a perspective view showing the attachment mounted so that the roller's axis of rotation is vertical. [Figure 6] This is a perspective view showing the attachment mounted so that the roller's axis of rotation is horizontal. [Figure 7] This is a perspective view showing the configuration of the attachment according to the second embodiment. [Figure 8] This is a perspective view showing the attachment in place. [Figure 9] This is a perspective view showing the configuration of the attachment according to the third embodiment. [Figure 10] This is a perspective view showing the attachment in place.

[0012] Embodiments of the present invention will be described below with reference to the drawings.

[0013] (First Embodiment) Figure 1 is a perspective view showing the overall configuration of a drilling device according to one embodiment of the present invention. The drilling device of this embodiment is used on steep slopes S, in places with poor footing where heavy machinery cannot easily enter, or on uneven ground. This device is used to drill holes in rock or the like at predetermined positions on the slope S by moving the drilling device 10 while it is suspended in the air by multiple wires and operated by a worker M.

[0014] The suspension structure of the drilling device will now be described. In this embodiment, the drilling device 10 is suspended and supported by wires 37 and 38 using a support point secured above (or to the side of) the slope S. Specifically, trees 31 or driven piles 32 located above the slope S are used as anchors. The type of anchor can be appropriately selected according to the site conditions, and artificial supports may be used instead of trees, or anchor pins driven into the bedrock may be used.

[0015] Each anchor (tree 31, pile 32, etc.) is fitted with sheaves 33 and 34, respectively, to serve as intermediate pulleys for changing the direction of wire tension. In addition, winches 35 and 36, which serve as drive sources for winding or unwinding the wire, are positioned at locations corresponding to these sheaves 33 and 34 (for example, at the base of the slope S or in nearby flat areas).

[0016] In the configuration shown in FIG. 1, for each fulcrum arranged on the left and right of the normal plane S, the sheaves 33, 34 and the winches 35, 36 are arranged in pairs, and the tensions of the two wires 37, 38 connected to the rear end (the upper end during suspension) of the drilling device 10 can be individually controlled.

[0017] Note that the support method of the drilling device 10 is not limited to this. In order to perform more stable attitude control, for example, similar anchors, sheaves, and winches (not shown) may be additionally arranged on the lower left and right of the normal plane S, and the drilling device 10 may be supported in a cross shape (hammock shape) using a total of four wires. In this case, by individually operating the four winches, it becomes possible to move the drilling device 10 up, down, left, and right and maintain its attitude more precisely.

[0018] Next, the configuration of the drilling device 10 will be described. The drilling device 10 includes a long guide cell 11 serving as a base, a slide mechanism 12 that can slide along the longitudinal direction of the guide cell 11 and move forward and backward, and a drifter 13 mounted on the slide mechanism 12. The drifter 13 is sometimes also referred to as a rotary percussion mechanism.

[0019] The drifter 13 is operated by a power source such as hydraulic pressure, pneumatic pressure, or electric power. This drifter 13 applies a rotational force and a percussion force to the attached rod 14, and through the bit 141 at the tip of the rod, it breaks the object (such as rock) to perform drilling. Note that the power supply to the drifter 13 is performed via a hose or the like (not shown) extending from an external power unit.

[0020] A rear end plate 15 for wire connection is provided at the rear end portion (the upper end portion in the suspended support state) of the guide cell 11. One end of each of the wires 37, 38 is connected to this rear end plate 15. Each of the wires 37, 38 extends radially upward and leftward from the rear end plate 15, and is wound around the winches 35, 36 on the ground via the sheaves 33, 34 of the respective anchors.

[0021] The worker M performing the drilling operation is positioned near the drilling device 10 on the slope S and assists with and checks the drilling work. Worker M (or another operator) also drives the winches 35 and 36 using a remote control to adjust the payout length of the wires 37 and 38. This allows the drilling device 10 to be smoothly moved to any target position (height and left / right position) on the slope S and held in a suitable position (angle) for drilling. The drilling device 10 is equipped with a handle 16, which allows worker M to fine-tune the drilling position.

[0022] Figure 2 is a perspective view showing the structure of the main part of the drilling device 10. This figure also shows the attachment (movement assisting means) 20 that is attached to the tip when the drilling device 10 is moving.

[0023] First, the detailed configuration of the drilling device 10 will be described. The guide cell 11 is a mast made of a long steel material, and a sliding mechanism 12 that can move in the longitudinal direction of the guide cell 11 is provided on its upper surface. A drifter 13, which is the power source for drilling, is mounted on top of this sliding mechanism 12.

[0024] A drilling rod 14 is rotatably connected to the tip of the drifter 13, and a bit 141 is provided at the very tip of this rod 14. Furthermore, a rear end plate 15 for connecting a suspension wire is positioned at the rear end of the drilling device 10 (upper left side in Figure 2).

[0025] The movement (feeding operation) of the drifter 13 is performed using a feed chain 121 provided along the guide cell 11. The feed chain 121 is stretched between both ends of the guide cell 11. The drifter 13 has a drive unit that meshes with the feed chain 121, and when the drive unit operates, the drifter 13, which is positioned on the slide mechanism 12, moves forward or backward.

[0026] During storage and transportation of this device, the feed chain 121 is in a relaxed state (unextended state) to avoid excessive load. On the other hand, when actually using the device for drilling operations, a predetermined strong tension is applied to the feed chain 121 via the chain adjustment bolt 181, etc., as described later.

[0027] Referring to the enlarged view of the tip of the drilling device 10 shown in the upper right of Figure 2, the tip structure of the guide cell 11 will be described in detail. On the longitudinal tip side of the guide cell 11, a support structure composed of multiple plates is provided so as to close the cross-section of the guide cell 11. This structure includes an end plate 171, a triangular support plate 172 joined to the front surface (drilling direction side) of the end plate 171 so as to protrude forward along the longitudinal direction of the guide cell 11, and a flange portion 173 provided at the very tip of the triangular support plate 172, which serves as a base for attaching the attachment 20.

[0028] A rectangular recess 171a is cut out in the center of the upper edge of the end plate 171. A chain adjustment section 18 for adjusting the tension of the feed chain 121 is provided around this recess 171a. The chain adjustment section 18 consists of a long adjustment bolt 181 connected to the end of the feed chain 121, a support plate 182 through which the adjustment bolt 181 passes, and a lock nut 183 that screws onto the adjustment bolt 181. The support plate 182 is positioned in contact with the back of the end plate 171 and plays a role in supporting the adjustment bolt 181 so that it can slide in the axial direction while receiving the reaction force due to the tension of the chain. The adjustment bolt 181 is an example of a chain tension adjustment member.

[0029] The adjustment bolt 181 is positioned so that its shaft extends forward of the drilling device 10 through a through hole in the support plate 182 and a recess 171a in the end plate 171. A lock nut 183 is screwed onto the adjustment bolt 181 from the front. In other words, by rotating the lock nut 183, the adjustment bolt 181 can be moved axially (forward and backward) with the support plate 182 as the pivot point.

[0030] In this configuration, when an operator tightens (or loosens) the lock nut 183, the adjustment bolt 181 is pulled forward (or retracted), and the tension of the feed chain 121 connected to it changes. Specifically, when the operator tightens the chain during use, the adjustment bolt 181 moves forward (outward). As a result, the tip of the adjustment bolt 181 protrudes significantly from the surface of the end plate 171 (see Figure 6).

[0031] The triangular support plate 172 of the end plate 171 is made of a plate material that is erected perpendicular to the plate surface of the end plate 171 (i.e., extending parallel to the longitudinal direction of the guide cell 11). Its shape is tapered, with the vertical width narrowing towards the front (approximately triangular in side view), achieving both lightness and high rigidity. In this embodiment, the triangular support plate 172 is provided so as to span from the left and right side ends of the flange portion 173 to the rear end plate 171 (see Figure 5). The shape of the triangular support plate 172 may be arbitrary, and it may be a plate member of any shape, including a rectangle.

[0032] The flange portion 173 has a rectangular shape (approximately square in this embodiment) with a predetermined thickness and is constructed by combining two plate members. In this embodiment, the flange portion 173 and the end plate 171 located behind it are formed to have approximately the same height (vertical dimension). The flange portion 173 is oriented parallel to the end plate 171 located behind it (i.e., perpendicular to the longitudinal direction of the guide cell 11). An opening is formed in one of the two plate members through which a cylindrical leg portion 19 can pass, and the leg portion 19 is sandwiched and fixed by the two plate members. As a result, the leg portion 19 is held in the center of the flange portion 173 so as to protrude forward along the longitudinal axis of the guide cell 11. The front surface of the flange portion 173 is a flat mounting surface.

[0033] Furthermore, bolt holes are formed through the four corners of the flange portion 173 for fastening the two plate members together. Figure 2 shows the state in which bolts are inserted into these bolt holes and the two plate members are fastened together, thereby clamping and fixing the leg portion 19. Note that fastening holes may also be provided in the connecting plate 21 of the attachment 20 at positions corresponding to the bolt holes of the flange portion 173. This allows for easy attachment and detachment by simply fitting with the guide member 23 under normal circumstances, while also enabling more secure fastening by using bolts to fasten the attachment 20 together with the flange portion 173 during long-distance travel or in sites where strong vibrations are expected.

[0034] The leg portion 19 is an elastic body made of, for example, rubber. When using the unit for drilling, the attachment 20 is removed and the leg portion 19 is exposed and pressed against the surface of the rock or structure. In this way, the leg portion 19 supports the reaction force and load during drilling, absorbs vibrations, and stabilizes the unit.

[0035] On the other hand, when moving the drilling device 10, the attachment 20 is attached to the flange portion 173 to which the leg portion 19 is fixed, so as to cover the leg portion 19. When the attachment 20 is attached, the leg portion 19 that was protruding from the center is housed and protected inside the attachment 20 (receiving portion), and instead the roller 25 of the attachment 20 (indicated by a reference numeral in Figure 3) comes into contact with the object, functioning as a smooth movement guide.

[0036] In other words, the tip structure of this embodiment integrates three elements: a flange portion 173 that serves as a base for making surface contact with the attachment 20 and fixing it with bolts during movement, a leg portion 19 that supports the load during use, and a movable adjustment bolt 181.

[0037] The specific configuration of the attachment 20 will be described with reference to Figures 3 and 4. The attachment 20 consists of a cylindrical roller 25 that serves as a guide during movement, a pair of roller fixing legs 24 that rotatably support the roller, and a pair of guide members 23 that assist in positioning and fixing the tip (flange portion 173) of the guide cell 11.

[0038] A rectangular connecting plate 21 is provided at the base of the attachment 20. In this specification, this connecting plate 21 may also be referred to as the "base." This connecting plate 21 is a plate-like member (identical in shape (approximately square)) similar to the flange portion 173 (see Figure 2) on the guide cell 11 side, and through holes are provided at its four corners. It is also possible to fasten the connecting plate 21 to the flange portion 173 with bolts using these holes.

[0039] A cylindrical receiving portion 22 is formed protruding from the rear side of the connecting plate 21 (the side facing the guide cell 11). This receiving portion 22 has an inner diameter larger than the outer diameter of the rubber-like leg portion 19 (see Figure 2) at the tip of the guide cell 11. When attaching the attachment 20, the leg portion 19 protruding from the guide cell 11 is housed in the inner space of the receiving portion 22. This makes it possible to attach the attachment 20 without removing the leg portion 19.

[0040] On the other hand, a pair of roller fixing legs 24 are erected on the front side (roller side) of the connecting plate 21 to support the roller 25. Each roller fixing leg 24 is a plate-shaped (or bracket-shaped) member extending forward from the connecting plate 21 and possesses high rigidity. The roller 25 is rotatably supported between the tips of this pair of roller fixing legs 24 via a pivot axis.

[0041] Furthermore, a pair of guide members 23 are provided on the back side of the connecting plate 21, similar to the receiving portion 22 (or sandwiching the receiving portion 22). These guide members 23 are plate-shaped members that extend equally wide from the side end of the connecting plate 21 toward the rear. A rectangular notch 23a is formed in a part of these guide members 23. This notch 23a functions as a clearance to receive the member on the guide cell side and as a space to suppress rotation, depending on the mounting direction of the attachment 20.

[0042] Next, specific usage examples of the attachment 20 will be explained using Figures 5 and 6. Figure 5 shows the attachment 20 mounted so that the rotation axis of the roller 25 is vertical. On the other hand, Figure 6 shows the attachment 20 mounted so that the rotation axis of the roller 25 is horizontal.

[0043] Figure 5 shows the attachment 20 mounted so that the axis of rotation of the roller 25 is vertical. This configuration is selected when the guide cell 11 is performing lateral movement or attitude control. In this configuration, the pair of guide members 23 are positioned on the left and right sides of the flange portion 173. Note that in the configuration shown in Figure 5, the feed chain 121 (see Figure 2) is loosened (in a non-extended state), and the amount of protrusion of the adjustment bolt 181 from the end plate 171 is relatively small.

[0044] Here, let's elaborate on the fitting state. In this embodiment, the connecting plate 21 and the flange portion 173 are the same size, and the guide member 23 is formed to be of equal width. Therefore, when the attachment 20 is attached, the guide member 23 fits precisely to the side surface of the flange portion 173. However, the present invention is not necessarily limited to this configuration. The connecting plate 21 and the flange portion 173 do not have to be the same size, and the guide member 23 does not have to be of equal width. It is sufficient that the flange portion 173 can fit between the guide members 23. For example, the guide member 23 may have a slight incline (slope). Even if such an incline is present, it functions as a guide to lead the flange portion 173 between the guide members 23 during attachment, which has the advantage of making it easier to insert the attachment 20.

[0045] In this vertical mounting configuration, the rotation of the attachment 20 is restricted by the triangular support plate 172, which is a structural member on the guide cell 11 side. Specifically, the tip portion of the triangular support plate 172 (the rib-shaped plate portion extending from the end plate 171 to the flange portion 173) fits into the notches 23a of the guide members 23 located on the left and right sides.

[0046] Here, the dimensional relationship in this embodiment will be explained. The groove width of the notch 23a is set to be larger (wider) than the thickness of the triangular support plate 172. That is, the notch 23a is loosely fitted to the triangular support plate 172, and a predetermined gap (clearance) is secured between the two. This makes it possible to smoothly attach the attachment 20 even if mud or other debris is attached at the site or if there is some misalignment. In this case, if the attachment 20 tries to rotate, the inner wall of the notch 23a comes into contact with the side surface of the triangular support plate 172, thereby restricting further large rotations.

[0047] Furthermore, as a further modification, a configuration with improved fixing accuracy may be adopted. For example, the groove width of the notch 23a may be set to be approximately the same as the plate thickness of the triangular support plate 172 (or to a fitting dimension within tolerance). With this configuration, when the attachment 20 is mounted, the guide member 23 will clamp the triangular support plate 172 from both sides without any gaps and fit together. This eliminates looseness to the greatest extent possible and makes it possible to more firmly restrain the posture of the attachment 20.

[0048] Figure 6 shows the attachment 20 mounted so that the axis of rotation of the roller 25 is horizontal. This configuration is selected when the guide cell 11 moves vertically (up and down) along the slope S. In this configuration, the pair of guide members 23 are positioned above and below the flange portion 173.

[0049] In the state shown in Figure 6, a predetermined tension is applied to the feed chain 121, and consequently, the amount of protrusion of the adjustment bolt 181 from the end plate 171 is relatively large. This protruding adjustment bolt 181 is positioned between the notches 23a of the guide member 23 located above it.

[0050] At this time, the adjustment bolt 181 is in a state where it does not interfere with any component of the attachment 20 (i.e., it does not obstruct tool access). On the other hand, since the adjustment bolt 181 protrudes into the inner region of the notch 23a, if the attachment 20 rotates, the inner wall of the notch 23a will come into contact with the adjustment bolt 181. Therefore, this configuration can also function as part of the rotation restriction function (a preliminary stopper).

[0051] Furthermore, with this configuration, even with the attachment 20 attached, the operator can easily access the protruding adjustment bolt 181 (or lock nut 183) using a tool such as a wrench and freely adjust the tension of the feed chain 121. In this horizontal mounting state, the main rotation prevention of the attachment 20 is ensured by the upper and lower guide members 23 sandwiching the sides (upper and lower surfaces) of the flange portion 173.

[0052] Here, we will discuss the challenges of the configuration shown in Figure 6, where the end plate 171 and the flange portion 173 are of the same height (width). In the attachment 20 of this embodiment, each of the pair of guide members 23 that sandwich the flange portion 173 has a deep notch 23a formed toward the base side. Therefore, when mounted horizontally as in Figure 6, even if the adjustment bolt 181 extends significantly from the end plate 171 to adjust the chain tension, the adjustment bolt 181 is accommodated by entering the internal space of the notch 23a. In other words, with this shape, the presence of the notch 23a in the guide member 23 that sandwiches the flange portion 173 ensures that the protruding adjustment bolt 181 can be reliably cleared, thus avoiding physical interference.

[0053] As described above, the attachment 20 of this embodiment realizes a rational rotation locking mechanism depending on its mounting orientation (vertical / horizontal). Specifically, when mounted vertically (see Figure 5), the notches 23a of the pair of guide members 23 engage with the triangular support plate 172, which is a structural member on the drilling device 10 side, thereby physically restraining the rotation of the attachment 20. On the other hand, when mounted horizontally (see Figure 6), the pair of guide members 23 sandwich the sides of the flange portion 173, and the adjustment bolt 181 protrudes from the inner region of the notch 23a, so that the adjustment bolt 181 functions as a rotation stopper (anti-rotation mechanism). As a result, despite having a single shape, it is possible to always maintain a constant orientation of the roller 25 regardless of the mounting direction.

[0054] According to this embodiment, the following effects can be obtained.

[0055] (1) Easier installation process The attachment 20 in this embodiment is equipped with a receiving portion 22 on one side of the connecting plate 21 that can accommodate the legs 19 of the drilling device 10. With this configuration, the operator can attach the attachment 20 simply by placing the receiving portion 22 over the legs 19, without having to remove the legs 19 which are firmly fixed to the tip of the drilling device 10. This significantly reduces the time and effort required for installation.

[0056] (2) Posture stabilization during movement The connecting plate 21 is provided with a pair of guide members 23 that can be fitted onto the flange portion 173 that fixes the leg portion 19. When the attachment 20 is attached, these guide members 23 fit by sandwiching or contacting the flange portion 173. This physically prevents the attachment 20 from rotating around the leg portion 19 as an axis. As a result, it is possible to prevent the attachment 20 from unexpectedly rotating during movement and changing the orientation of the roller 25, and to maintain the guiding function at all times in the appropriate orientation relative to the direction of travel.

[0057] (3) Reducing the burden of movement A roller 25 is provided on the other side (front side) of the connecting plate 21. With this configuration, when moving the drilling device 10, the rotating roller 25 makes contact with the slope S or the ground instead of the fixed legs 19. This significantly reduces frictional resistance with uneven surfaces and obstacles on the slope S, allowing the drilling device 10 to move smoothly. As a result, the physical burden on the worker M who supports, pushes, and pulls the heavy drilling device 10 is reduced, enabling safe and efficient movement.

[0058] (4) Adaptation to direction of movement (improvement of versatility) In this embodiment, the guide member 23 is positioned to fit onto the substantially square flange portion 173. This configuration allows the mounting orientation of the attachment 20 to be changed in 90-degree increments by utilizing the 90-degree rotational symmetry of the square. Specifically, by simply rotating the attachment 20 by 90 degrees and refitting it onto the flange portion 173, the orientation of the roller 25's axis of rotation can be easily switched between horizontal (for vertical movement) and vertical (for lateral movement). As a result, even with a single attachment 20, the optimal guide direction can be instantly selected and changed on-site depending on the site conditions and the movement path (whether moving up and down or laterally on the slope S).

[0059] (5) Improved stability of the fixed structure The receiving portion 22 has a cylindrical shape that can accommodate the cylindrical leg portion 19. Since the circular inner shape of the receiving portion 22 corresponds to the outer shape of the leg portion 19, the axes of the two are more likely to coincide when the receiving portion is accommodated. As a result, the radial positioning of the attachment 20 is naturally achieved, and the receiving portion 22 is supported from the inside by the leg portion 19 (it has a core), which effectively suppresses rattling during installation and achieves a stronger and more stable fixed state.

[0060] (6) Avoidance of physical interference The guide member 23 has a notch 23a formed in the end edge opposite the base, extending toward the base. For structural reasons, the tip of the drilling device 10 (around the flange portion 173) often has protruding adjustment bolts 181 for adjusting chain tension and triangular support plates 172 for ensuring strength. With this configuration, when attaching the attachment 20, these protrusions can be received (relieved) into the space of the notch 23a. This avoids physical interference with the protrusions and makes it possible to reliably attach the attachment 20 to the predetermined position (inside) of the flange portion 173.

[0061] (7) Strengthening of rotation restrictions The notch 23a also functions as a rotation stopper to restrict the rotation of the attachment 20. Specifically, a structural member (e.g., a triangular support plate 172) provided on the tip side of the drilling device 10 fits inside the notch 23a, causing the inner wall surface of the notch 23a to contact the side surface of the structural member. This more firmly prevents the attachment 20 from rotating around the leg portion 19 due to vibrations and shocks during movement, and, in combination with flange clamping by the guide member 23, the orientation of the roller 25 can always be kept constant.

[0062] (8) Ensuring maintainability Furthermore, this notch 23a also functions as a workspace for maintenance of the drilling device 10. In particular, if the adjustment bolts 181 and lock nuts 183 for adjusting the tension of the feed chain 121 are located inside (or on the open side) of the notch 23a, the worker can insert a tool through the notch 23a to access the adjustment bolts 181 and lock nuts 183 without removing the attachment 20. This makes it possible to immediately adjust the chain tension on-site while the attachment 20 is still attached, significantly improving work efficiency.

[0063] (Second Embodiment) Next, a second embodiment of the present invention will be described with reference to Figures 7 and 8. The second embodiment is an embodiment in which the stability of fixing is further enhanced by changing the longitudinal length of the guide member 23 and improving the shape of the guide member 23.

[0064] Figure 7 shows an example of the configuration of an attachment 20 preferably used in this embodiment. The guide member 23 of this attachment 20 is formed to be longer than that of the first embodiment. This guide member 23 has a first guide member 231 located on the connecting plate 21 side and a second guide member 232 extending from the first guide member 231 in the direction opposite to the connecting plate 21.

[0065] The first guide member 231 and the second guide member 232 are connected and formed such that their inclinations with respect to their extension direction (the rate of change of the distance between opposing guide members) are different. Specifically, the first guide member 231 has an inclination (or width) that allows it to clamp the flange portion 173, and the second guide member 232 has an inclination (or width) that allows it to clamp the end plate 171, etc. The first guide member 231 may be formed with equal width so that the distance between opposing guide members is constant, as shown in the example of the first embodiment. The notch portion 23a is formed by cutting out from the end edge of the second guide member 232 to partway along the first guide member 231 toward the connecting plate 21.

[0066] Figure 8 is a perspective view showing the attachment 20 mounted horizontally. In the illustrated configuration, the end plate 171 is larger than the flange portion 173 (particularly in height in the vertical direction). According to the configuration of this embodiment, when mounted horizontally, a pair of first guide members 231 sandwich the flange portion 173, and the second guide member 232 sandwiches the end plate 171 (or near the base of the triangular support plate 172). In this way, the attachment 20 is supported at two points by the first guide members 231 and the second guide members 232, which have different shapes, and the attachment 20 is more firmly fixed to the drilling device 10.

[0067] In the second embodiment (see Figures 7 and 8), the second guide member 232 of the attachment 20 has a shape that widens outward (expands) at the tip side compared to the first guide member 231. By widening the opening width between the guide members in this way, even when the adjustment bolt 181 is extended to its maximum extent, it is possible to reliably avoid physical interference between the bolt tip and surrounding members with the guide member 232. Furthermore, this widened shape expands the open space around the notch 23a, ensuring sufficient working space. As a result, even with the attachment installed, it becomes possible to insert a tool such as a wrench through the notch 23a and easily operate the adjustment bolt 181, etc. This significantly improves on-site maintainability.

[0068] According to this embodiment, the following effects can be obtained.

[0069] (9) Improved fixing strength through multi-stage design The guide member 23 of this embodiment has a first guide member 231 and a second guide member 232, each with a different inclination. With this configuration, the flange portion 173 is gripped by the first guide member 231 on the side closer to the base portion 21 of the attachment 20, while the end plate 171 and the machine structure, which have different widths and shapes from the flange portion 173, are gripped by the second guide member 232 on the inner side (farther from the base portion 21). In other words, since the guide members 23 corresponding to the inclinations of multiple members of different dimensions simultaneously contact or engage with each member, the mounting rigidity and attitude stability of the attachment 20 can be significantly improved compared to gripping only a single member.

[0070] (Third embodiment) Next, a third embodiment of the present invention will be described with reference to Figures 9 and 10. The third embodiment is an embodiment in which the number of guide members 23 is changed to further enhance the stability of the fixation.

[0071] As shown in Figure 9, the attachment 20 of this embodiment includes a total of four guide members 23 extending from the vicinity of the four corners of the connecting plate 21. Each guide member 23 is preferably formed in a fork shape having a notch 23a, similar to the first embodiment.

[0072] Figure 10 shows the attachment 20 according to the third embodiment attached to the drilling device 10. The four guide members 23 are arranged to surround the four sides of the flange portion 173, including the top, bottom, left, and right sides. As a result, the attachment 20 is firmly held in place by being clamped between the flange portion 173 and the guide members 23 from all directions (top, bottom, left, and right).

[0073] With this configuration, even if an external force acts on the attachment 20 from an unexpected direction during movement, the posture of the attachment 20 can be stably maintained. In addition, because there are guide members 23 in four locations, even if the mounting orientation (vertical / horizontal) is changed, all guide members 23 always play a role in holding the flange portion 173 or preventing interference, achieving both high versatility and fixing strength.

[0074] According to this embodiment, the following effects can be obtained.

[0075] (10) Ensuring further retention stability In this embodiment, four guide members 23 are arranged to surround the four sides of the flange portion 173. With this configuration, even if a load is applied to the attachment 20 from either the vertical or horizontal direction, the guide members 23 will always be supported by the sides of the flange portion 173. This ensures that the attachment 20 does not shift position or fall off even in the event of severe vibrations associated with movement on uneven ground or impact input from unexpected directions. In addition, the four-way restraint increases the torsional strength of the attachment 20 itself, making it possible to maintain an extremely robust fixed state.

[0076] Although embodiments of the present invention have been described above, these embodiments only represent a part of the application examples of the present invention, and are not intended to limit the technical scope of the present invention to the specific configurations of the above embodiments. [Explanation of symbols]

[0077] 10: Drilling equipment 11: Guide cell 12: Sliding mechanism 121: Feed Chain 13: Drifter 14: Rod 141:bit 15: Rear end plate 16: Handle 171: End plate 172:Triangular support plate 173: Flange section 181: Adjustment bolt 182: Support plate 183: Lock Nut 19: Legs (support members) 20: Attachment 21: Connecting plate (base) 22: Cylindrical receiving part 23: Guide member 23a: Notch 231: First guide member 232: Second guide member 24: Roller fixed legs 25: Laura 31: Standing Tree 32:Pile 33, 34: Seeb 35, 36: Winch 37, 38: Wire M: Worker S: Slope

Claims

1. An attachment provided at the tip of a drilling device suspended and supported by a wire, which is detachably attached to a support member that supports its own weight during drilling, A plate-shaped base, A receiving portion is provided on one side of the base and houses the support member inside, A rolling element provided on the other side of the base, which functions as a guide during movement, An attachment comprising at least one pair of plate-like bodies extending in a direction intersecting the plate surface of the base, and a guide member that can be fitted to a flange portion located at the tip of the drilling device.

2. The rolling element is a roller, The attachment according to claim 1, wherein the guide member is arranged to be fitted to the substantially square flange portion.

3. The attachment according to claim 1 or 2, wherein the receiving portion has a cylindrical shape capable of accommodating the cylindrical support member.

4. The attachment according to claim 1, wherein the guide member has a notch formed therein, cut out from the edge opposite to the base toward the base.

5. The attachment according to claim 4, wherein the notch is configured to receive a chain tension adjustment member protruding from the tip of the drilling device.

6. The attachment according to claim 4 or 5, wherein the notch is configured to accept a part of the plate member connecting the tip of the drilling device and the flange.

7. The guide member comprises a first guide member located on the base side and a second guide member extending further away from the base than the first guide member. The first guide member and the second guide member have different inclinations, which are the rate of change of the distance between the opposing guide members. The first guide member is configured to be fitted to the flange portion, The attachment according to claim 1, wherein the second guide member is configured to be able to clamp the end plate located behind the flange portion.

8. The attachment according to claim 1, wherein the guide members extend four times from the plate surface of the base and are arranged so as to surround the four sides of the flange portion.

9. An attachment provided at the tip of a drilling device suspended and supported by a wire, which is detachably attached to a support member that supports its own weight during drilling, A plate-shaped base, A receiving portion is provided on one side of the base and houses the support member inside, A rolling element provided on the other side of the base, which functions as a guide during movement, A method for fixing an attachment, which comprises a pair of plate-like bodies extending in a direction intersecting the base plate surface and a guide member that can be fitted to a flange portion located at the tip of the drilling device, to the tip of the drilling device suspended by a wire, A method for fixing an attachment, comprising the step of housing the support member of the drilling device within the receiving portion of the attachment and fitting the guide member to the flange portion of the drilling device.

10. The guide member has a notch formed therein, which is cut out from the edge opposite to the base toward the base. The method for fixing an attachment according to claim 9, further comprising the step of receiving in the notch portion a chain tension adjustment member protruding from the tip of the drilling device, or a part of a plate member connecting the tip portion of the drilling device and the flange portion.

11. A drilling system comprising a drilling device suspended and supported by a wire, and an attachment detachably attached to the tip of the drilling device, The drilling device has a support member that supports its own weight during drilling, and a flange portion positioned near the support member. The aforementioned attachment is A plate-shaped base, A receiving portion is provided on one side of the base and houses the support member inside, A rolling element provided on the other side of the base, which functions as a guide during movement, It comprises a pair of plate-like bodies extending in a direction intersecting the plate surface of the base, and a guide member that can be fitted to the flange portion, A drilling system characterized in that the support member is housed within the receiving portion and the guide member is fitted into the flange portion.

12. The drilling device has a chain tension adjustment member protruding from the tip of the drilling device, The guide member of the attachment has a notch formed therein, which is cut out from the edge opposite to the base toward the base. The drilling system according to claim 11, wherein the chain tension adjustment member is housed in the internal space of the notch.

13. The drilling device has an end plate positioned behind the flange portion, and the end plate is formed to be taller than the flange portion. The guide member of the attachment comprises a first guide member that fits into the flange portion and a second guide member that sandwiches the end plate, wherein the second guide member is wider than the first guide member. The drilling system according to claim 12, wherein when the chain tension adjusting member is extended, a part of the chain tension adjusting member is positioned within the notch formed in the region of the second guide member, thereby avoiding interference with the guide member.

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