Drilling System

Abstract

To enable a drilling device to automatically move along a structure which is a drilling target.SOLUTION: A drilling system comprises: a drilling device A1 including a hammer drill 1 that drills a structure S; and guiding means A2 for guiding the drilling device A1 to move along the structure S. The drilling device A1 includes: an elevation mast 12 including an elevation table 14 on which the hammer drill 1 is mounted; a chassis 20 on which the elevation mast 12 is mounted and in which a geared motor 28, where a pinion gear 27 is attached to an output axis 28a, is provided; and plural casters 26 attached to the chassis 20 and supporting the drilling device A1 in a movable manner. The guide means A2 includes: a guide rail 33 laid along the structure S; and a rack gear 34 attached along the guide rail 33 and meshing with the pinion gear 27. The drilling device A1 moves along the structure S with a rotation of the casters 26 by the geared motor 28 while being guided by the guide rail 33.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a drilling system equipped with a drilling device for drilling holes in a concrete structure. [Background technology]

[0002] In existing structures such as roads, bridges, dams, and levees that have concrete frames, reinforcement is placed on the sides and top and bottom of the frame and additional concrete is poured in order to maintain and reinforce the structure. This is known as the "additional pouring" method.

[0003] In the additional casting method, holes are drilled at regular intervals in the structure, post-installed anchors (shear reinforcement) are embedded, and anchoring material is filled in. Reinforcement bars are then placed in the area where additional casting will be performed, connecting with the post-installed anchors. After that, formwork is installed and concrete is poured.

[0004] Note that a technique for reinforcing an existing structure by pouring additional concrete is known, for example, from Patent Document 1 (JP 2018-131848 A).

[0005] Here, the additional driving method uses a drilling machine to drill holes in an existing structure to embed post-installed anchors. Specific drilling machines include hammer drills, which drill holes by striking the structure while rotating, and percussion drills, which drill holes by rotating while vibrating finely.

[0006] During drilling work, the on-site worker firmly holds the handle and side handle of the drilling machine, which is a heavy object, with both hands, pulls the trigger on the handle with his finger to turn on the power, and places the tip of the bit at the drilling position to begin digging. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Japanese Patent Application Publication No. 2018-131848 Summary of the Invention [Problem to be solved by the invention]

[0008] With the additional installation method, thousands or even tens of thousands of holes must be drilled into the structure to embed a large number of post-installed anchors. This requires manual work using a drilling machine, which is hard work and results in poor work efficiency. For this reason, there was a desire to mechanize and automate the drilling work.

[0009] Therefore, as a device that can drill holes in concrete structures while reducing the burden on the worker, it is possible to construct a drilling device in which the above-mentioned drilling machine is installed so that it can be raised and lowered and moved forward and backward, and to use the installed drilling machine to drill continuous holes in the concrete.

[0010] When drilling holes with a drilling device, it is necessary to move the drilling device along the structure that is the target of drilling. To do this, it is possible to attach casters to the drilling device, and once drilling at a predetermined position is completed, adopt a structure in which the drilling device can be manually moved along the structure to the next drilling position.

[0011] However, with such a structure, it takes time to move the drilling device and set it at the next drilling position, and it cannot meet the demand for more efficient drilling.

[0012] The present invention has been made in light of the above technical background, and aims to provide a technique that can automatically move a drilling device along a structure that is to be drilled. [Means for solving the problem]

[0013] In order to solve the above problem, the drilling system of the present invention described in claim 1 is a drilling system having a drilling machine that is arranged so as to be movable toward and away from the structure to be drilled, and a guide means for guiding the movement of the drilling machine along the structure, wherein the drilling machine is mounted on a lifting column to which a lifting member that is raised and lowered by a lifting motor is attached, a chassis on which the lifting column is mounted and on which a running motor having a pinion gear attached to an output shaft is installed, and a plurality of casters that are attached to the chassis and movably support the drilling machine, and the guide means is It consists of two rails arranged parallel to each other and erected perpendicular to the floor, and is laid along the structure. a guide rail; and a rack gear attached along the extension direction of the guide rail and meshing with the pinion gear, The chassis is provided with a pair of holding rollers at two locations spaced apart from each other, which are disposed between the two rails, rotate in contact with the opposing vertical surfaces of the rails as the drilling device moves, maintain the meshing state between the rack gear and the pinion gear, and receive the reaction force during drilling; The drilling device is characterized in that it moves along the structure by rotation of the casters while being guided by the guide rail via the pinion gear and the rack gear by the travel motor.

[0014] The drilling system of the present invention as set forth in claim 2 is characterized in that, in the invention as set forth in claim 1, it further comprises a detection means for detecting the amount of movement of the drilling device.

[0015] The drilling system of the present invention described in claim 3 is characterized in that, in the invention described in claim 2 above, it further has a control means for controlling the rotation of the travel motor so that the drilling device moves to a predetermined movement position based on the detection means.

[0016] The drilling system of the present invention described in claim 4 is characterized in that, in the invention described in claim 2 or 3 above, a servo motor is used as the power source motor for the traveling motor, and the detection means is at least one of a rotary encoder that rotates as the drilling device moves, and a rangefinder that measures the distance traveled by the drilling device.

[0017] The drilling system of the present invention described in claim 5 is characterized in that, in the invention described in claim 2 or 3 above, a stepping motor is used as the motor that is the power source for the traveling motor, and the detection means is at least one of a controller that generates a pulse signal to be input to the traveling motor and a rangefinder that measures the distance traveled by the drilling device.

[0018] The drilling system of the present invention described in claim 6 is characterized in that, in the invention described in any one of claims 1 to 5 above, the traveling motor is a geared motor in which a motor, which is a power source, and a reducer are integrated, and the rotation of the motor is reduced by the reducer and the rotational force is transmitted to the output shaft.

[0021] Claim 7 The drilling system of the present invention described above Claims 1 to 6 In the invention described in any one of the above, the rack gear is attached along the side of the guide rail, and the pinion gear is attached to the output shaft of the traveling motor, which protrudes downward.

[0022] Claim 8 The drilling system of the present invention described in claim 3 is characterized in that, in the invention described in claim 3 above, it further comprises an air compressor that drives an operating member that pneumatically operates a power switch provided on the drilling machine and drives an air cylinder that moves the drilling machine forward and backward, a dust collector that sucks up dust generated during drilling by the drilling machine, and a housing unit that houses a control panel on which the control means is mounted.

[0023] Claim 9 The drilling system of the present invention described above Claim 8 In the described invention, the air compressor, the dust collector and the housing unit are mounted on a cart separate from the chassis, and are connected to the chassis via connecting members and towed by the chassis. [Effects of the Invention]

[0024] According to the present invention, the drilling device has a pinion gear attached to the output shaft of the travel motor that meshes with a rack gear attached to the guide rail, and as the travel motor rotates, the drilling device is guided by the guide rail via the pinion gear and rack gear, and moves along the structure by the rotation of the casters. Therefore, it is possible to automatically move the drilling device along the structure to be drilled. [Brief explanation of the drawings]

[0025] [Figure 1] An explanatory diagram showing a portion of a concrete structure that has been earthquake-resistant reinforced by inserting shear reinforcement steel bars into holes drilled with a drilling system according to one embodiment of the present invention. [Figure 2] FIG. 1 is a side view of a drilling system according to one embodiment of the present invention. [Figure 3] 3 is a plan view showing the chassis and guide rails of the drilling device that constitutes the drilling system of FIG. 2. [Figure 4] 3 is a diagram showing the main parts of the drilling device and guide rails that make up the drilling system of FIG. 2. FIG. [Figure 5] 5 is a diagram showing the main parts of the drilling device and the guide rails that make up the drilling system of FIG. 2, viewed from a direction that is 90 degrees horizontally different from that of FIG. 4. [Figure 6] 3 is a side view showing a rotary encoder and a guide rail attached to a drilling device that constitutes the drilling system of FIG. 2. [Figure 7] 7 is a diagram showing the rotary encoder and guide rail attached to the drilling device that constitutes the drilling system of FIG. 2, viewed from a direction 90 degrees horizontally different from that of FIG. 6. [Figure 8] FIG. 3 is a plan view showing a guide rail that constitutes the drilling system of FIG. 2. [Figure 9] 9 is an enlarged plan view showing an end portion of the guide rail of FIG. 8. FIG. [Figure 10] 9 is a view of the guide rail of FIG. 8 viewed horizontally from an end portion. [Figure 11] FIG. 3 is a rear view of the drilling system of FIG. 2. [Figure 12] A side view showing a hole-drilling section that constitutes a hole-drilling device of a hole-drilling system according to a modified example of the present invention. [Figure 13] FIG. 13 is a rear view of the drilling device of FIG. 12. [Figure 14] 13 is a side view showing a hole-drilling support unit that constitutes the hole-drilling device of FIG. 12. DETAILED DESCRIPTION OF THE INVENTION

[0026] Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. In the drawings for explaining the embodiment, the same components are generally designated by the same reference numerals, and repeated description thereof will be omitted.

[0027] The drilling system A (Figure 2, etc.) of this embodiment is used to drill holes H, such as anchor holes (holes for embedding post-installed anchors), from one side as part of a reinforcement work process for an existing concrete structure S that contacts ground G, as shown in Figure 1, or an existing concrete structure (road, bridge, dam, levee, etc.) constructed on the ground near a railway, road, or other building. After filling the drilled holes H with anchoring material M, shear reinforcing bars R are inserted and integrated with the structure S, thereby improving the shear strength of the structure S. Note that the shear reinforcing bars R may be, for example, a commonly used reinforcing bar R1 with one end threaded and diagonally cut, and with a hexagonal nut (anchor) R2 attached to the tip.

[0028] As shown in Figure 2, the drilling system A of this embodiment is composed of a drilling device A1 in which a hammer drill (drilling machine) 1 for drilling holes in a structure S to be drilled is mounted so that it can move forward and backward, and a guide means A2 that guides the movement of the drilling device A1 along the structure S.

[0029] Here, the drilling device A1 is equipped with a lifter 10 that supports the hammer drill 1 so that it can be raised and lowered. This lifter 10 is equipped with a lifter base 11, a lifting mast (lifting column) 12 mounted on the lifter base 11, and a lifting table (lifting member) 14 that is driven by a lifting motor 13 installed at the lower end of the lifting mast 12 and rises and falls along the side of the lifting mast 12, and the hammer drill 1 described above is installed on the lifting table 14.

[0030] Two vertically extending slits (not shown) are formed on the side of the lifting mast 12, which has a rectangular horizontal cross section, where the lifting table 14 is installed, to guide the lifting and lowering of the lifting table 14. Two guide plates (not shown) attached to the rear of the lifting table 14 are fitted into these slits, forming a small gap between them and the slits, allowing the lifting table 14 to move vertically. As a result, the lifting table 14 moves up and down the lifting mast 12 along the slits via the guide plates. The lifter 10 also has a vertically disposed ball screw 15 that is rotated by the lifting motor 13 and is threadedly engaged with the lifting table 14. Therefore, when the ball screw 15 is rotated by the drive of the lifting motor 13, the lifting table 14 moves up or down along the slits. When the lifting motor 13 stops, the lifting table 14 stops at the height position at that time.

[0031] The hammer drill 1 mounted on the lifting table 14 of the lifter 10 is driven by a drill drive motor (not shown) and is capable of striking and / or rotating, and the strength of the impact can also be adjusted. However, strength adjustment is not required. The hammer drill 1 is mounted on a reciprocating member 2 that reciprocates linearly on the lifting table 14, and can be moved back and forth by the reciprocating member 2 in the hole-drilling direction.

[0032] Here, the advancing / retracting member 2 is equipped with a slider 2a on which the hammer drill 1 is mounted, a slide guide 2b that holds the slider 2a so that it can move back and forth in the drilling direction, and an air cylinder (not shown) as thrust applying means that applies a thrust (thrust for reciprocating movement) to the slider 2a. The air cylinder is a two-port type with cylinder chambers located in front of and behind the slider 2a, and air is supplied to and discharged from each cylinder chamber. When air is supplied to either cylinder chamber, the slider 2a slides, guided by the slide guide 2b, and this causes the hammer drill 1 on the slider 2a to move back and forth.

[0033] In this embodiment, a pneumatic operating unit 1b is used as an operating member for operating the power switch of the hammer drill 1. A tube (not shown) through which air is supplied as a driving force is detachably connected to this pneumatic operating unit 1b, and when air is injected, the pneumatic operating unit 1b expands and presses the power switch, turning the power on, and when the air is released, the pneumatic operating unit 1b contracts, releasing the pressure on the power switch and turning the power off.

[0034] Then, air is supplied to the pneumatic operation unit 1b to turn on the power switch of the hammer drill 1, the drill drive motor is rotated to start driving the hammer drill 1, and the air cylinder moves the slider 2a in a direction approaching the concrete structure S that is the drilling target, causing the hammer drill 1 to advance, and the tip of the bit 1a of the hammer drill 1 is pressed against the drilling position in the structure S, and drilling is carried out. After drilling is completed, the air cylinder moves the slider 2a in a direction away from the structure S, causing the hammer drill 1 to retreat, whereupon the bit 1a of the hammer drill 1 is removed from the hole and returned to its standby position.

[0035] In this embodiment, the drilling depth by the hammer drill 1 is about 200 mm. However, the drilling depth is determined by the length of the bit 1a attached to the hammer drill 1 and the sliding length of the slider 2a, and is not limited to 200 mm as in this embodiment.

[0036] On the side of the lifting mast 12 opposite to the side where the lifting table 14 is installed, a regulator 12a is arranged to adjust the air pressure from the air compressor 36 (described later) to a predetermined value when driving the air cylinder that applies propulsion force to the slider 2a and the pneumatic operating unit 1b that operates the power switch of the hammer drill 1.

[0037] In addition, as a thrust applying means for applying a thrust to the slider 2a, a thrust applying means other than an air cylinder may be used, such as a ball screw that moves the slider 2a forward and backward by rotating, and a drill advance / retract motor that rotates this ball screw.

[0038] As shown in Figure 3, the drilling device A1 is provided with a chassis 20 including the aforementioned lifter base 11 on which the lifting mast 12, which is a component of the lifter 10, is mounted. This chassis 20 is equipped with a pair of first beams 21 that are arranged parallel to each other and perpendicular to the movement direction of the drilling device A1 (described later), and a pair of second beams 22 that are fixed to both sides of the first beams 21 and are parallel to each other, and has a generally rectangular frame shape in plan view. The length of the second beam 22 is longer than the width formed by the pair of first beams 21, and overhang portions 22a are formed on both sides of the second beam 22 outside the fixed positions of the first beams 21.

[0039] In this embodiment, columns made of square tube steel are used for the first beam 21 and the second beam 22, but this is not limited to this, and it is possible to use steel materials other than columns, such as H-shaped steel.

[0040] The above-mentioned lifter base 11 is equipped with a lifting motor 13 and is fixed between a pair of first beams 21 at approximately the center in the longitudinal direction of the first beams 21. Furthermore, a reinforcing frame 23 for reinforcing the first beams 21 is provided between the pair of first beams 21 near the lifter base 11.

[0041] Brackets 24a are attached to both ends of a pair (i.e., two) of second beams 22 at a total of four locations, and outriggers 24 are attached to the brackets 24 for stabilizing the chassis 20 by touching the ground when the hammer drill 1 is drilling a hole. In addition, caster stands 25 that are L-shaped in plan view are installed at four locations so as to straddle the end of the first beam 21 and the overhanging portion 22a of the second beam 22. Casters 26 that movably support the chassis 20, i.e., the drilling device A1, are attached to each caster stand 25 in a direction approximately perpendicular to the direction of movement of the hammer drill 1.

[0042] 4 and 5, a geared motor (travel motor) 28, having a pinion gear 27 that meshes with a rack gear 34 (described later) attached to an output shaft 28a, is installed on the chassis 20 via a bracket 29. This geared motor 28 is a device in which a motor and a reducer are integrated, and the rotation of the motor is reduced by the reducer and the rotational force is transmitted to the output shaft 28a.

[0043] In this embodiment, a geared motor 28 capable of obtaining large torque is used as the driving motor, but it is also possible to use a motor alone or a motor with a separate reducer, and the driving motor is not limited to the geared motor 28.

[0044] As shown in Figures 6 and 7, a rotary encoder (detection means) 31 that detects the amount of movement of the hole drilling device A1 is attached to the chassis 20 via a bracket 30 on the opposite side of the geared motor 28 across the pair of first beams 21. A pinion gear 32 that meshes with a rack gear 34, which will be described later, is also attached to the rotating shaft 31a of this rotary encoder 31. The rotary encoder 31 is also stored in a housing 31b to prevent the intrusion of surrounding dust. Detection of the amount of movement of the hole drilling device A1 by the rotary encoder 31 will be described later.

[0045] In the geared motor 28 of this embodiment, a servo motor capable of controlling the rotational position is used as the motor that is the power source, and by converting the mechanical displacement of rotation into an electrical signal (pulse) using a rotary encoder 31, it is possible to stop the servo motor at the number of pulses counted by a counter not shown.

[0046] In the drilling system A of this embodiment, a guide means A2 for guiding the movement of the drilling device A1 along the structure S is provided.

[0047] 8 to 10, this guide means A2 comprises a guide rail 33 laid along the structure S to be drilled, and a rack gear 34 attached along the extension direction of the guide rail 33. The rack gear 34 is in mesh with the pinion gears 27, 32 described above (i.e., the pinion gear 27 attached to the output shaft 28a of the geared motor 28, and the pinion gear 32 attached to the rotation shaft 31a of the rotary encoder 31).

[0048] Therefore, when the geared motor 28 rotates, the drilling device A1 is guided by the guide rail 33 via the pinion gear 27 and the rack gear 34, and moves along the structure S by the rotation of the casters 26 attached to the drilling device A1. At this time, the rotary encoder 31 rotates as the drilling device A1 moves (more specifically, the rotary encoder 31 rotates via the rack gear 34 and the pinion gear 32), so the movement amount of the drilling device A1 can be detected by setting the number of pulses to the next movement position and counting the number of pulses generated by the rotary encoder 31 with a counter. Then, by stopping the geared motor 28 when the set number of pulses is reached, the drilling device A1 can be moved accurately to the desired position.

[0049] The drilling system A of this embodiment is provided with a CPU (control means) (not shown) that controls the rotation of the geared motor 28 based on the rotary encoder 31 so that the drilling device A1 moves to a predetermined movement position, allowing the drilling device A1 to be moved to a predetermined drilling position by automatic control. Furthermore, the CPU not only controls the rotation of the geared motor 28, but also controls the rotation of the lifting motor 13 that raises and lowers the lifting table 14 on which the hammer drill 1 is mounted, and controls the drilling operation by the hammer drill 1, so that drilling of the structure S is automatically performed at a predetermined drilling position and drilling depth. However, it is sufficient for the CPU to only control the movement of the drilling device A1 using the geared motor 28, and it is not necessary for it to also control the rotation of the lifting motor 13 or the drilling operation of the hammer drill 1.

[0050] In this embodiment, rotary encoder 31 is used as a means for detecting the amount of movement of drilling device A1, but a rangefinder that measures the amount of movement of drilling device A1 using laser light, ultrasonic waves, or the like may also be used. Furthermore, to improve detection accuracy, rotary encoder 31 and a rangefinder may be used together. Furthermore, if the motor that constitutes geared motor 28 is a stepping motor, the number of pulse signals generated by the controller and input to the motor is the amount of rotation of the motor (i.e., the amount of movement of drilling device A1), and therefore the controller may also be used as a means for detecting the amount of movement of drilling device A1. Even in this case, a rangefinder that measures the amount of movement of drilling device A1 using laser light, ultrasonic waves, or the like may be used, or a controller and a rangefinder may be used together to improve detection accuracy.

[0051] Furthermore, instead of using a detection means to detect the amount of movement of the hole drilling device A1, for example, a movement position may be marked on the guide rail 33, and the hole drilling device A1 may be stopped at that position. In this case, the detection means is not necessary.

[0052] 4, 6, 8 to 10, the guide rail 33 of the present embodiment described above includes two rails 33a made of angle bars arranged parallel to each other, and connecting plates 33b, which are steel plates arranged at a predetermined interval between the rails 33a and welded to connect the two rails 33a at their bottoms. The guide rails 33 are also provided with bridge plates 33c, which are welded to span the adjacent connecting plates 33b and have elongated holes 33ca formed in them, and are fixed to the ground with anchor bolts 33d passing through the elongated holes 33ca in the bridge plates 33c.

[0053] 8, a connecting plate 33b (an independent connecting plate 33b) that is not spanned by the bridge plate 33c is installed near the connecting plate 33b that is spanned by the bridge plate 33c (at a position spaced the length of the bridge plate 33c). In this way, if the anchor bolt 33d cannot be driven into the originally planned position, one side of the bridge plate 33c is installed so as to span the independent connecting plate 33b, so that the anchor bolt 33d can be driven in again by shifting the driving position.

[0054] As shown in Figures 3, 4 and 6, a holding roller (holding member) 35 for keeping the rack gear 34 and the pinion gears 27, 32 in mesh with each other is attached to the chassis 20 at a position adjacent to the geared motor 28 and the rotary encoder 31.

[0055] The pair of retaining rollers 35 are arranged between the two rails 33a and rotate in contact with each rail 33a as the drilling device A1 moves. As a result, the retaining rollers 35 rotate and act as guides when the drilling device A1 moves, thereby keeping the rack gear 34 and pinion gears 27, 32 in mesh with each other and functioning as part of the reaction force mechanism when drilling.

[0056] The rail 33a may be formed of a material other than an angle bar. The holding member that holds the rack gear 34 and the pinion gears 27, 32 in mesh is not limited to the holding roller 35 shown in this embodiment, and may have a structure other than that of this embodiment, such as a structure in which there is one rail 33a and one holding roller 35, and the rack gear 34 and the rail 33a are sandwiched between the one holding roller 35 and the pinion gears 27, 32.

[0057] In this embodiment, the rack gear 34 is attached along the side of the guide rail 33, the pinion gear 27 is attached to the output shaft 28a of the geared motor 28 that protrudes downward, and the pinion gear 32 is attached to the rotary shaft 31a of the rotary encoder 31 that protrudes downward. In this way, the rack gear 34 can also be attached facing upward, but this avoids the problem of dust getting in and accumulating between the rack gear 34 and the pinion gears 27, 32 when drilling a structure, allowing the drilling device A1 to move smoothly at all times. However, the attachment position of the rack gear 34 does not have to be the side of the guide rail 33.

[0058] 2, an air compressor 36 is mounted on the rear of the chassis 20 to supply air to the air cylinder that propels the slider 2a and to the pneumatic operating unit (operating member) 1b that operates the power switch of the hammer drill 1. A dust collector 37 is also mounted on the air compressor 36. The tip of a suction hose (not shown) extending from the dust collector 37 is connected to the bit 1a of the hammer drill 1, and dust generated when drilling the structure S is sucked into the dust collector.

[0059] Furthermore, a control box (housing) 38 containing the control panel with the CPU installed, the power distribution panel, and various other devices is mounted behind the air compressor 36. A rear view of such a drilling device A1 is shown in Figure 11.

[0060] As explained above, according to the drilling system A of this embodiment, the pinion gear 27 attached to the output shaft 28a of the geared motor 28 meshes with the rack gear 34 attached to the guide rail 33, and as the geared motor 28 rotates, the drilling device A1 is guided along the guide rail 33 via the pinion gear 27 and the rack gear 34, while moving along the structure S with the rotation of the casters 26. Therefore, it becomes possible to automatically move the drilling device A1 along the structure S that is the target of drilling.

[0061] This eliminates the need to manually move the drilling device A1 along the structure S to the next drilling position, which not only reduces the burden on the worker but also allows the drilling device A1 to be moved quickly, shortening travel time and enabling efficient drilling.

[0062] The guide means A2, which is equipped with the guide rail 33 and the rack gear 34, does not have to be laid over the entire length of the structure S to be drilled. In other words, if the guide means A2 is removed from the portion where drilling has been completed and laid and extended in the portion where drilling will be performed, the drilling device A1 can be moved automatically to drill continuously even if the total length of the guide means A2 is shorter than the total length of the structure S to be drilled.

[0063] Furthermore, as mentioned above, the drilling device A1 is provided with casters 26, so that the drilling device A1 can be moved manually even in places where it is not possible to lay guide rails 33 to allow automatic movement, or even in places where guide rails 33 are not laid because the distance the drilling device A1 can travel is short.

[0064] In the drilling device A1 of the above-mentioned drilling system A, the drilling section A1a (hammer drill 1, lifter 10, lifting motor 13, geared motor 28, etc.) that actually performs the drilling and the drilling support section A1b (air compressor 36, dust collector 37, control box 38, etc.) that drives the drilling section and sucks up dust generated during drilling are mounted on the same chassis 20, but as shown in Figures 12 to 14, the drilling support section A1b may be mounted on a cart 39 separate from the chassis 20 and connected to the chassis 20 by a connecting member 40, and may be towed by the chassis 20 by the rotation of casters 39a attached to the cart 39.

[0065] In this way, the chassis 20 is shorter in the front-to-rear direction (the direction in which it approaches or moves away from the structure S to be drilled), making the drilling device A1 more compact, so that drilling can be performed using the drilling device A1 even when there is little space to move the drilling device A1 (for example, in the case of a narrow passage).

[0066] Furthermore, since the drilling device A1 can be made more compact in the front-to-rear direction in this way, when an operator operates the distribution board inside the control box 38, a large space is created behind the operator, improving workability.

[0067] As shown in Figure 14, the carriage 39 is not provided with a function for being guided by the guide rail 33 (i.e., a pinion gear that meshes with the rack gear 34 attached to the guide rail 33). This is because the distance between the carriage 39 and the structure S that is the target of drilling is not an issue, and it is sufficient for the carriage 39 to be towed to the hole drilling section A1a.

[0068] The invention made by the inventor has been specifically described above based on the embodiments, but the embodiments disclosed in this specification are illustrative in all respects and are not limited to the disclosed technology. In other words, the technical scope of the present invention should not be interpreted restrictively based on the description of the above embodiments, but should be interpreted solely in accordance with the claims, and includes technologies equivalent to the technologies described in the claims and all modifications that do not deviate from the gist of the claims.

[0069] For example, in this embodiment, a hammer drill 1 is used as the drilling machine, but this is not limited to this. In other words, various drilling machines capable of drilling holes in a concrete structure S, such as a vibration drill, can be applied.

[0070] In addition, in this embodiment, the operating member for the power switch of the hammer drill 1 is a pneumatic operating unit 1b that expands and contracts using air as a driving force, but various other devices can also be used, such as an electric actuator that presses and releases the power switch using electricity as a driving force.

[0071] In addition, in this embodiment, an air cylinder operated by air pressure is used as a thrust applying means for applying a thrust to the slider 2a, but a hydraulic cylinder operated by oil pressure or a ball screw rotated by a motor may also be used.

[0072] Furthermore, the casters 26 are fixed in the direction perpendicular to the movement direction of the hammer drill 1 as in this embodiment, i.e., the running direction is fixed, but a free-running type in which the running direction is swivelable may also be used. [Industrial Applicability]

[0073] The above explanation shows the case where the drilling device of the present invention is used to drill anchor holes in an additional construction method for an existing concrete structure, but it is not limited to this and can be widely applied to drilling holes in concrete structures. [Explanation of symbols]

[0074] 1 Hammer drill (boring machine) 1a bit 1b Pneumatic operating unit (operating member) 2. Moving parts 2a Slider 2b Slide guide 10 Lifter 11 Lifter stand 12 Lifting mast (lifting column) 13 Lifting motor 14 Lifting table (lifting member) 20 chassis 21 First Beam 22 Second Beam 22a Overhang 23 Reinforcement frame 24 Outrigger 24a bracket 25 Caster stand 26 Caster 27 Pinion gear 28 Geared motor (travel motor) 28a Output shaft 29 Bracket 30 Bracket 31 Rotary encoder (detection means) 31a Rotation axis 31b Housing 32 Pinion gear 33 Guide rail 33a Rail 33b Connecting plate 33c bridge plate 33ca long hole 33d Anchor bolt 34 Rack Gear 35 Holding roller (holding member) 36 Air Compressor 37 Dust collector 38 Control box (housing) 39 Cart 40 Connecting member A Drilling System A1 Drilling equipment A1a Drilling section A1b Drilling support section A2 Guidance means S structure

Claims

1. A drilling system having a drilling device equipped with a drilling machine that is movable toward and away from a structure to be drilled, and a guide means that guides the movement of the drilling device along the structure, The drilling device is a lifting column to which the drilling machine is mounted and to which a lifting member that is lifted and lowered by a lifting motor is attached; a chassis on which the lifting column is mounted and on which a running motor having a pinion gear attached to an output shaft is installed; a plurality of casters attached to the chassis and movably supporting the drilling device; the guide means comprises a guide rail that is constructed of two rails that are arranged parallel to each other and that are erected perpendicular to the floor surface and that is laid along the structure, and a rack gear that is attached along the extension direction of the guide rail and that meshes with the pinion gear, The chassis is provided with a pair of holding rollers at two locations spaced apart from each other, which are disposed between the two rails, rotate in contact with the opposing vertical surfaces of the rails as the drilling device moves, maintain the meshing state between the rack gear and the pinion gear, and receive the reaction force during drilling. The drilling device moves along the structure by rotation of the casters while being guided by the guide rail via the pinion gear and the rack gear by the travel motor. A drilling system characterized by:

2. Further, a detection means for detecting the amount of movement of the drilling device is provided.

2. The drilling system according to claim 1.

3. a control means for controlling the rotation of the travel motor based on the detection means so that the drilling device is moved to a preset position; 3. The drilling system according to claim 2.

4. The traveling motor uses a servo motor as a motor that is a power source, The detection means is at least one of a rotary encoder that rotates in accordance with the movement of the drilling device and a distance meter that measures the movement distance of the drilling device.

4. A drilling system according to claim 2 or 3.

5. The driving motor is a stepping motor, which is a power source. the detection means is at least one of a controller that generates a pulse signal to be input to the traveling motor and a distance meter that measures the travel distance of the drilling device; 4. A drilling system according to claim 2 or 3.

6. The traveling motor is a geared motor in which a motor serving as a power source and a reducer are integrated, and the rotation of the motor is reduced by the reducer and the rotational force is transmitted to the output shaft. A drilling system according to any one of claims 1 to 5.

7. The rack gear is attached along the side of the guide rail, The pinion gear is attached to the output shaft of the traveling motor, which protrudes downward. A drilling system according to any one of claims 1 to 6.

8. An air compressor that drives an operating member that pneumatically operates a power switch provided on the drilling machine and drives an air cylinder that moves the drilling machine forward and backward; a dust collector that sucks up dust generated by drilling by the drilling machine; and a housing unit that houses a control panel on which the control means is mounted.

4. The drilling system according to claim 3.

9. The air compressor, the dust collector, and the housing are mounted on a cart separate from the chassis, and are connected to the chassis via a connecting member and towed by the chassis.

9. The drilling system according to claim 8.

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