Multi-saw system capable of traveling

Abstract

The multi-saw system according to the present invention comprises: a wire saw device provided inside the upper part of a main body frame to rotate a wire saw; a wall saw device rotatably provided at the rear of the main body frame to rotate a cutting blade; and a plurality of wheels provided under the main body frame and rotated by a power unit provided inside the lower part of the main body frame.

Description

Driveable multi-saw system

[0001] The present invention relates to a drivable multi-saw system, and more particularly, to a self-driving multi-saw system / device that is equipped with a wire saw device and a rotary cutting blade device at the same time.

[0002] In general, stones processed through raw stone extraction are widely used as construction materials for buildings or civil engineering projects in the construction field. For example, they are processed and used as products such as building walls, road curbs, sidewalk blocks, or building floors.

[0003] These stones are mined in large rectangular shapes from quarries by businesses that have received forest damage permits, transported to stone processing companies, and then cut to an appropriate thickness and area to provide the stone itself in plate form. They are also cut again to meet specifications and then surface-processed to provide the stone.

[0004] As mentioned above, examples of methods for extracting ore from a quarry include the jet burner extraction method using a jet burner, a drill, and gunpowder, and the wire saw extraction method using a wire saw, a drill, and gunpowder.

[0005] Among them, the wire saw mining method is to determine the size of the stone (rock) and drill vertically and horizontally with a longitudinal drill to make vertical and horizontal holes in an "L" shape, pass a long wire saw (saw string) through the drilled holes, and then rotate it while pulling both ends with a pulling machine to cut it, but the back and bottom of the raw stone that is not cut are drilled and blasted with gunpowder.

[0006] This wire saw cutting method has the advantages of minimizing environmental problems and noise generation, not using kerosene (oil), and suppressing flying dust, but has the problem of taking a lot of time for extraction due to poor working conditions and cutting efficiency.

[0007] A wall saw, also known as a wall cutter, is designed to cut a wall vertically erected on the floor with a rotating cutting blade. Conventionally, the cutter is designed to cut the wall by moving along a guide rail installed to be fixed along the wall. Since the cutting blade rotates to cut the concrete wall, the guide rail must be firmly installed to support it.

[0008] Since conventional wall saws cut along a set path along a guide rail, if cutting is required while moving along a different path, the previously installed guide rail must be removed and re-installed along a different path, significantly reducing cutting efficiency. For example, if cutting is to be done at a different height on a wall, the guide rail must be reinstalled, increasing the workload and taking a lot of time.

[0009] In addition, since the wire saw device and the wall saw device were previously equipped independently, there was the inconvenience of having to transport and operate the two devices separately.

[0010] The present invention aims to provide a multi-saw device that is capable of self-driving and is equipped with a wire saw device and a rotary cutting blade device at the same time.

[0011] To achieve the above object, the multi-saw device of the present invention comprises: a wire saw device mounted on the upper inner side of a main body frame and rotating a wire saw; a wall saw device rotatably mounted on the rear side of the main body frame and rotating a cutting blade; and a plurality of wheels mounted on the lower side of the main body frame and rotated by a power unit provided on the lower inner side of the main body frame.

[0012] It may further include a plurality of outriggers mounted on the side of the above main body frame.

[0013] The above main body frame may include a floor plate that is coupled to the middle portion of the main body frame so as to be inclined forward, a cover plate that is coupled to one side and an upper surface of the main body frame, and a door plate that is rotatably mounted on the other side of the main body frame.

[0014] The front lower part of the above cover plate may further include a dust collecting connection to which a dust collecting hose of a dust collecting device for collecting dust and water is connected.

[0015] The wire saw device may include a drive pulley mounted on the front inside of the main frame; a drive motor that rotates the drive pulley; a driven pulley mounted on the rear inside of the main frame; a wire saw wound multiple times between the drive pulley and the driven pulley; a first roller bracket rotatably mounted on the upper front side of the main frame to guide the wire saw; and a second roller bracket rotatably mounted on the lower front side of the main frame to guide the wire saw.

[0016] The first roller bracket and the second roller bracket may each include an upper roller and a lower roller that are rotatably mounted on a bracket that is rotatably mounted on the wire guide tube and is mounted on the inside of the main body frame, and a wire guide tube through which the wire saw passes.

[0017] The above-mentioned driven pulley can be arranged so that its rotation axis is inclined.

[0018] The above wire saw device may further include a guide rail longitudinally fixed to the main body frame; a lead screw rotated by an electric motor; a moving member that moves forward and backward along the guide rail by rotation of the lead screw; and a pulley bracket coupled to the moving member and on which a rotational axis of the driven pulley is mounted.

[0019] The above-described wall saw device may include a rotary base coupled to the upper surface of the rear end of the main body frame by changing the rotation angle, a first link rotatably mounted on the rotary base, a second link rotatably mounted on the first link, a third link rotatably mounted on the second link, a first cylinder mounted between the rotary base and the first link, a second cylinder mounted between the first link and the second link, a third cylinder mounted between the second link and the third link, a cutting blade motor mounted on an end of the third link, and a cutting blade rotated by the cutting blade motor.

[0020] The above-mentioned wall saw device further includes a coupling disk that is coupled to the end of the third link by changing the rotation angle, and the cutting blade motor can be mounted on the coupling disk.

[0021] The above-mentioned coupling disc may include a rotational axis hole formed in the center and a plurality of fastening holes formed in the periphery.

[0022] According to the multi-saw device of the present invention described above, the device is capable of self-driving and is equipped with a wire saw device and a rotary cutting blade device simultaneously, so that wire saw cutting work and wall saw cutting work can be selectively performed as needed.

[0023] FIG. 1 is a side view showing a multi-saw device according to one embodiment of the present invention.

[0024] Figure 2 is a front view showing a multi-saw device according to one embodiment of the present invention.

[0025] FIG. 3 is a rear view schematically illustrating a multi-saw device according to one embodiment of the present invention.

[0026] Figure 4 is a partial perspective view showing the inside of the main body frame of the wire saw device.

[0027] Figure 5 is a partial perspective view showing the driven pulley of the wire saw device.

[0028] Figure 6 is a partial perspective view showing the driven pulley of the wire saw device.

[0029] Figure 7 is a partial perspective view showing the inside of the main body frame of the wire saw device.

[0030] Figure 8 is a partial perspective view showing a cooling water injection pipe of a wire saw device.

[0031] Figure 9 is a drawing showing a wall saw device (a) and a coupling disk (b).

[0032] Figure 10 is a working state diagram showing cutting a wall with a wall saw device.

[0033] The present invention is susceptible to various modifications and embodiments. Specific embodiments are illustrated and described in detail in the detailed description. However, this is not intended to limit the present invention to specific embodiments, but rather to encompass all modifications, equivalents, and alternatives falling within the spirit and technical scope of the present invention.

[0034] The terminology used herein is merely used to describe specific embodiments and is not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly indicates otherwise. In the present invention, it should be understood that the terms "comprise" or "have" are intended to specify the presence of a feature, number, step, operation, component, part, or combination thereof described in the specification, but do not exclude in advance the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

[0035] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. Please note that, where possible, identical components are represented by identical reference numerals throughout the drawings. Furthermore, detailed descriptions of well-known functions and configurations that may obscure the gist of the present invention will be omitted. For the same reason, some components in the attached drawings are exaggerated, omitted, or schematically depicted.

[0036] FIG. 1 is a side view showing a multi-saw device according to one embodiment of the present invention, FIG. 2 is a front view showing a multi-saw device according to one embodiment of the present invention, and FIG. 3 is a rear view schematically showing a multi-saw device according to one embodiment of the present invention.

[0037] The multi-saw device (100) of the present invention can be called by various names, such as a multi-saw system. The multi-saw device (100) of the present invention includes a wire saw device that is mounted on the upper inner side of a main body frame (110) and rotates a wire saw (190), a wall saw device that is rotatably mounted on the rear side of the main body frame (110) and rotates a cutting blade (270), and a plurality of wheels (125) that are mounted on the lower side of the main body frame (110) and rotated by a power unit (120) provided on the lower inner side of the main body frame.

[0038] A wire saw device is a device for cutting metal or concrete structures, rocks, etc. using a wire saw (190) having diamond beads at predetermined intervals on its outer surface. The main body frame (110) may be composed of a metal frame and a metal plate. The wire saw device may be mounted on the upper portion of the internal space of the main body frame (110).

[0039] The wall saw device can be rotatably mounted on the upper surface of the lower frame extending rearward from the main body frame (110). The wall saw device can cut walls, etc., by rotating cutting blades (270) provided at the ends of a plurality of links.

[0040] Two pairs of wheels (125) are mounted on the lower side of the main body frame (110) and are rotated by the power unit (120), thereby enabling the multi-saw device (100) to travel on its own. The two pairs of wheels (125) may be configured as a pair of caterpillar tracks. The power unit (120) is mounted on the lower inner side of the main body frame (110) and can drive the wheels (125) or operate a hydraulic motor, a hydraulic cylinder, and an electric motor.

[0041] A plurality of outriggers (130) may be mounted on the side of the main body frame (110). Four outriggers (130) may be installed on the front and rear of the lower side of the main body frame (110). The outriggers (130) may have legs that can be moved up and down by hydraulic pressure, and the legs may be moved horizontally to stably support the entire device by placing a large distance between each pair of legs.

[0042] As illustrated in FIG. 1, the main body frame (110) may include a floor plate (111) that is coupled to the middle portion of the main body frame so as to be inclined downward in the forward direction, a cover plate (113) that is coupled to one side and the upper surface of the main body frame, and a door plate (112) that is rotatably mounted on the other side of the main body frame.

[0043] The floor plate (111) is formed in the shape of a roughly rectangular metal plate and can be joined to the inner middle height of the main body frame (110) so as to be inclined downwards in a forward direction. Dust generated by the wire saw (190) and the supplied cooling water can flow forward along the inclined floor plate (111).

[0044] The cover plate (113) can be welded or fastened to one side and the upper surface of the main body frame (110) to be joined. In addition, the cover plate (113) can also be joined to the rear surface of the main body frame (110).

[0045] The door plate (112) can be rotatably mounted on the other side of the main body frame (110). The door plate (112) is formed in a roughly rectangular plate shape and has a plurality of hinges at the lower corners so that it can be rotatably mounted up and down on the side of the main body frame (110).

[0046] The front lower part of the cover plate (113) may further include a dust collecting connection part (114) to which a dust collecting hose of a dust collecting device that collects dust and water is connected.

[0047] The wire saw (190) is introduced into the interior from the front of the main body frame (110) and is extended outward. A plurality of guide rollers may be installed at the front of the main body frame (110) to guide the movement of the wire saw (190). The main body frame (110) may further include a safety cover portion (114) extending forward from the cover plate (113) at both front sides. The safety cover portion (114) may have an upper surface and a bottom surface as well as side surfaces on both sides. The dust collection connection portion (114) is arranged at the lower part of one side of the safety cover portion (114) to discharge flowing dust and water to the dust collection device.

[0048] Fig. 4 is a partial perspective view showing the inside of the main body frame of a wire saw device, Fig. 5 is a partial perspective view showing a driven pulley of a wire saw device, Fig. 6 is a partial perspective view showing a driven pulley of a wire saw device, Fig. 7 is a partial perspective view showing the inside of the main body frame of a wire saw device, and Fig. 8 is a partial perspective view showing a coolant injection pipe of a wire saw device.

[0049] The wire saw device may include a drive pulley (140) mounted on the inner front of a main body frame (110), a drive motor (150) that rotates the drive pulley, a driven pulley (160) mounted on the inner rear of the main body frame, a wire saw (190) wound multiple times between the drive pulley and the driven pulley, a first roller bracket (200) that is rotatably mounted on the upper front of the main body frame (110) to guide the wire saw (190), and a second roller bracket (210) that is rotatably mounted on the lower front of the main body frame (110) to guide the wire saw (190).

[0050] As illustrated in FIGS. 1 and 7, the drive pulley (140) may be mounted with its rotation axis horizontally on one inner front side of the main body frame (110). The drive pulley (140) may be mounted adjacent to a plurality of pulleys having grooves formed on the outer surface thereof so that the wire saw (190) can be wound multiple times.

[0051] The drive motor (150) is mounted on one side of the drive pulley (140) and can rotate the rotation axis of the drive pulley (140). The drive motor (150) may be configured as a hydraulic motor.

[0052] The driven pulley (160) can be mounted on the inner rear of the main body frame (110). The driven pulley (160) can also be mounted adjacent to a plurality of pulleys having grooves formed on the outer surface thereof so that the wire saw (190) can be wound multiple times. As illustrated in FIGS. 5 and 6, the driven pulley (160) can be rotatably mounted on a rotational shaft coupled to a pulley bracket (161) that moves forward and backward.

[0053] As illustrated in Fig. 5, the driving pulley (140) may be composed of five pulleys, and the driven pulley (160) may be composed of six pulleys. The number of pulleys of the driving pulley (140) and the driven pulley (160) is not limited thereto, and the driven pulley (160) may have one more pulley than the driving pulley (140).

[0054] The wire saw (190) can be wound multiple times between the drive pulley (140) and the driven pulley (160). By doing so, the length of the wire that is in contact with the air is increased, thereby enhancing the cooling effect by the air, and even by moving the driven pulley (160) only slightly, the wire saw (190) can be pulled relatively tighter.

[0055] In addition, it is preferable that the driven pulley (160) be arranged so that its axis of rotation is inclined. Since the wire saw (190) is wound while moving back and forth between the driving pulley (140) and the driven pulley (160), the wire saw (190) must smoothly move from one pulley of the driving pulley (140) to the next pulley of the driven pulley (160). Therefore, by arranging the axis of rotation of the driven pulley (160) so that it is inclined, the wire saw (190) can smoothly rotate between the driving pulley (140) and the driven pulley (160).

[0056] The first roller bracket (200) is rotatably mounted on one side of the front upper portion of the main body frame (110) and can guide the wire saw (190) introduced into the inside of the main body frame (110).

[0057] The second roller bracket (210) is rotatably mounted on the front lower side of the main body frame (110) and can guide the wire saw (190) that is extended out of the main body frame (110).

[0058] The above-mentioned safety cover part (114) is arranged to cover at least the first roller bracket (200) and the second roller bracket (210) to prevent safety accidents such as finger entrapment.

[0059] The first roller bracket (200) and the second roller bracket (210) may each include a wire guide tube (202, 212) that is mounted on the inside of the main body frame (110) and through which the wire saw (190) passes, and an upper roller (204, 214) and a lower roller (206, 216) that are rotatably mounted on brackets that are rotatably mounted on the wire guide tube (202, 212).

[0060] The wire guide tube (202, 212) may be formed in the form of a circular tube that is mounted on one side of the inside of the main body frame (110) and through which the wire saw (190) passes. A bracket on which two rollers are mounted is rotatably mounted on the wire guide tube (202, 212), and an upper roller (204, 214) and a lower roller (206, 216) may be mounted on the bracket at a predetermined interval from each other.

[0061] The first roller bracket (200) and the second roller bracket (210) are rotatable and have two rollers, so that the rotating wire saw (190) can be kept taut at a desired position.

[0062] As shown in FIGS. 4 and 7, the wire saw device may further include a guide rail (170) that is fixed longitudinally to a main body frame (110), a lead screw (175) that is rotated by an electric motor (185), a movable member (180) that moves forward and backward along the guide rail by rotation of the lead screw, and a pulley bracket (161) that is coupled to the movable member and on which a rotational axis of a driven pulley (160) is mounted.

[0063] A pair of guide rails (170) can be fixed to the upper inner side of the main body frame (110). The guide rails (170) are formed in the shape of a circular tube or circular rod with a smooth outer surface, and the front and rear ends can be fixed to the main body frame (110) by screws.

[0064] The lead screw (175) has a square or trapezoidal screw thread formed on the outer surface, and the front and rear ends can be rotatably mounted on the main body frame (110) by bearings, respectively. The front end of the lead screw (175) can be rotated by being connected to the rotational axis of the electric motor (185).

[0065] The movable member (180) is slidably mounted on a pair of guide rails (170) and is screw-coupled to a lead screw (175) so that it can move forward and backward by the rotation of the lead screw (175). A pulley bracket (161) of a driven pulley (160) is coupled to one side of the lower portion of the movable member (180), so that the driven pulley (160) can move forward and backward as the movable member (180) moves.

[0066] Meanwhile, as illustrated in FIG. 8, the wire saw device may further include a coolant injection pipe (155) that injects coolant to the drive pulley (150).

[0067] The coolant injection pipe (155) is mounted on a bracket coupled to the inside of the main body frame (110) and can spray coolant toward the drive pulley (150). The coolant injection pipe (155) has multiple injection holes formed on the side, so that coolant can be supplied to each of the multiple pulleys of the drive pulley (150). In the past, the worker had to directly supply coolant to the wire cutting area, but in the case of the present invention, by providing the coolant injection pipe (155) to the wire saw device, coolant can be automatically supplied during the cutting operation.

[0068] Fig. 9 is a drawing showing a wall saw device (a) and a coupling disk (b), and Fig. 10 is a working state diagram showing cutting a wall with a wall saw device.

[0069] The wall saw device may include a rotating base (220) that is coupled to the upper surface of the rear end of the main body frame (110) by changing the rotation angle, a plurality of links that are sequentially rotatably mounted on the rotating base, a plurality of cylinders that are mounted between the rotating base and the plurality of links, a cutting blade motor (260) that is mounted on the ends of the plurality of links, and a cutting blade (270) that is rotated by the cutting blade motor.

[0070] The rotary base (220) can be rotatably mounted on the upper surface of the lower frame extending rearward from the main body frame (110). The rotary base (220) has a roughly circular disk shape, and a rotary shaft hole can be formed in the center and a plurality of fastening holes can be formed around it. The lower end of the first link (231) and the lower end of the first cylinder (241) can be rotatably mounted on the upper surface of the rotary base (220).

[0071] The plurality of links may include a first link (231) rotatably mounted on a rotating base, a second link (232) rotatably mounted on the first link, and a third link (233) rotatably mounted on the second link.

[0072] The first link (231) may be formed as the longest of the three links and may be formed in a bent shape in the middle. The third link (233) may be formed as the smallest of the three links.

[0073] The plurality of cylinders may include a first cylinder (241) mounted between the rotating base (220) and the first link (231), a second cylinder (242) mounted between the first link (231) and the second link (232), and a third cylinder (243) mounted between the second link (232) and the third link (233).

[0074] The first cylinder (241) may be connected to the lower middle of the first link (231). The second cylinder (242) may be rotatably connected to brackets provided on the upper sides of the first link (231) and the second link (232), respectively. The third cylinder (243) may be rotatably connected to brackets provided on the upper sides of the second link (232) and the third link (233), respectively.

[0075] The cutting blade motor (260) can be mounted at the end of the third link (233). The cutting blade motor (260) can be configured as a hydraulic motor.

[0076] The cutting blade (270) may be formed in a form in which a diamond saw blade is provided on the edge of a circular disk. The cutting blade (270) may be mounted on the rotation axis of the cutting blade motor (260) to cut a wall.

[0077] As shown in Fig. 9, the wall saw device further includes a coupling disk (250) that is coupled to the end of the third link (233) by changing the rotation angle, and the cutting blade motor (260) can be mounted on the coupling disk (250).

[0078] The coupling disk (250) has a roughly circular disk shape and can be detachably coupled to the end of the third link (233). By changing the rotation angle of the coupling disk (250) and coupling it, the cutting blade motor (260) can be arranged vertically or horizontally with respect to the wall.

[0079] The coupling disk (250) may include a rotation shaft hole (252) formed in the center and a plurality of fastening holes (254) formed in the periphery. The rotation shaft hole (252) is formed as a circular through hole, and a bracket having a shape corresponding to the coupling disk (250) is provided at the end of the third link (233), and a circular protrusion that is inserted into the rotation shaft hole (252) may be formed on the bracket. Four fastening holes (254) may be formed on the periphery of the rotation shaft hole (252).

[0080] A cutting blade motor (260) can be fastened and fixed to the upper surface of the coupling disk (250).

[0081] As illustrated in Fig. 10, the wall saw device can vertically cut a wall by vertically mounting a cutting blade (270). At this time, by controlling the operation of multiple cylinders to move multiple links in an appropriate posture, the cutting blade (270) can be moved downward while performing the cutting operation.

[0082] In addition, by rotating the cutting blade motor (260) 90 degrees and connecting it to the coupling disk (250), the cutting blade (270) can be positioned horizontally to cut the wall horizontally. At this time, the cutting blade (270) can be moved by driving multiple wheels (125) to move the multi-saw device (100) itself forward and backward.

[0083] According to the multi-saw device of the present invention, it is capable of self-driving and is equipped with a wire saw device and a rotary cutting blade device simultaneously, so that wire saw cutting work and wall saw cutting work can be selectively performed as needed.

[0084] Above, one embodiment of the present invention has been described, but a person having ordinary skill in the art will be able to modify and change the present invention in various ways by adding, changing, deleting or adding components, etc., within the scope that does not depart from the spirit of the present invention described in the claims, and this is also included within the scope of the present invention.

[0085] [Explanation of symbols]

[0086] 100: Multi-Saw Device

[0087] 110: Body frame 111: Floor plate

[0088] 112: Door plate 113: Cover plate

[0089] 114: Safety cover 115: Dust collection connection

[0090] 120: Power unit 125: Wheels

[0091] 130: Outrigger

[0092] 140: Drive pulley

[0093] 150: Drive motor 155: Coolant injection pipe

[0094] 160: Driven pulley 161: Pulley bracket

[0095] 170: Guide rail 175: Lead screw

[0096] 180: Moving member 185: Electric motor

[0097] 190: Wire Saw

[0098] 200: 1st roller bracket 202: Wire guide tube

[0099] 204: Upper roller 206: Lower roller

[0100] 210: Second roller bracket 212: Wire guide tube

[0101] 214: Upper roller 216: Lower roller

[0102] 220: Rotating base

[0103] 231: First link 232: Second link

[0104] 233: Third Link

[0105] 241: Cylinder 1 242: Cylinder 2

[0106] 243: Cylinder 3

[0107] 250: Combination disc 252: Rotating shaft hole

[0108] 254: Fastener

[0109] 260: Cutting blade motor

[0110] 270: Cutting blade

[0111] The drivable multi-saw system is available for industrial use on construction sites.

Claims

1. A wire saw device that is mounted on the upper inner side of the main body frame and rotates the wire saw; A wall saw device that is rotatably mounted on the rear side of the main body frame and rotates the cutting blade; and A multi-saw device comprising a plurality of wheels mounted on the lower side of the main body frame and rotated by a power unit provided on the lower inner side of the main body frame.

2. In paragraph 1, A multi-saw device characterized in that it further includes a plurality of outriggers mounted on the side of the main body frame.

3. In paragraph 1, The above main body frame A floor plate that is connected to the middle part of the above main body frame with a downward slope toward the front, A cover plate that is attached to one side and the upper surface of the above main body frame, A multi-saw device characterized by including a door plate rotatably mounted on the other side of the main body frame.

4. In paragraph 3, A multi-saw device characterized in that the front lower part of the cover plate further includes a dust collecting connection part to which a dust collecting hose of a dust collecting device for collecting dust and water is connected.

5. In paragraph 3, The above wire saw device A driving pulley mounted on the inner front of the above main body frame; A driving motor that rotates the above driving pulley; A driven pulley mounted on the inner rear of the above main body frame; A wire saw wound multiple times between the above drive pulley and the driven pulley; A first roller bracket rotatably mounted on the front upper portion of the main body frame to guide the wire saw; and A multi-saw device characterized in that it includes a second roller bracket that is rotatably mounted on the front lower part of the main body frame and guides the wire saw.

6. In paragraph 5, The above first roller bracket and the above second roller bracket are each, A wire guide tube that is mounted on the inside of the above main body frame and through which the wire saw passes, A multi-saw device characterized by including an upper roller and a lower roller rotatably mounted on a bracket rotatably mounted on the above wire guide tube.

7. In paragraph 5, A multi-saw device characterized in that the above-mentioned driven pulley has a rotating shaft arranged at an angle.

8. In paragraph 5, The above wire saw device A guide rail fixed longitudinally to the above main body frame; A lead screw rotated by an electric motor; A moving member that moves forward and backward along the guide rail by rotation of the lead screw; A multi-saw device characterized in that it further includes a pulley bracket coupled to the above moving member and on which the rotation axis of the driven pulley is mounted.

9. In paragraph 1, The above-mentioned wall saw device A rotating base that is connected to the upper surface of the rear end of the main body frame by changing the rotation angle, A first link rotatably mounted on the above rotating base, A second link rotatably mounted on the first link, A third link rotatably mounted on the second link, A first cylinder mounted between the above rotating base and the first link, A second cylinder mounted between the first link and the second link, A third cylinder mounted between the second link and the third link, A cutting blade motor mounted on the end of the third link, A multi-saw device characterized by including a cutting blade rotated by the cutting blade motor.

10. In paragraph 9, The above-mentioned wall saw device further includes a coupling disk that is coupled to the end of the third link by changing the rotation angle, A multi-saw device characterized in that the above cutting blade motor is mounted on the above combination disk.

11. In paragraph 10, The above combined disc is A rotating shaft formed in the center, A multi-saw device characterized by including a plurality of fastening holes formed in the periphery.

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