Concrete pile head cutting apparatus

Abstract

The present invention provides a concrete pile head cutting apparatus which checks a concrete pile and the position of the concrete pile, and then fixes the concrete pile through first and second clamp arms, and after contact with the concrete pile is confirmed, enables cutting work to be performed, thereby enabling the cutting work on the concrete pile to be easily performed and thus enabling cutting of the concrete pile to be performed even without user confirmation, and when a cutting unit moves along the periphery of the concrete pile and performs the cutting work on the concrete pile, a cutting start position and a cutting end position may be detected, thereby improving cutting work efficiency, and when the cutting unit moves along the periphery of the concrete pile and performs the cutting work on the concrete pile, cutting is performed on only the portions other than the center region of the concrete pile, and then the clamp arms clamp and break the concrete pile.

Description

Concrete pile head cutting device

[0001] The present invention relates to a concrete pile head cutting device, and more specifically, to a concrete pile head cutting device that measures a cutting position of a concrete pile head, performs a cutting operation after fixing the concrete pile with a predetermined pressure, moves along the circumference of the concrete pile while being fixed to the concrete pile as a cutting target, and performs the cutting operation on the concrete pile while measuring a start position and an end position, etc., around the concrete pile so as to make the cutting, thereby improving the efficiency of the cutting operation, and makes the cutting only in a portion excluding the central region of the concrete pile as a cutting target, and then lifts and processes the cut concrete pile head.

[0002] Concrete pile construction is a method of securing the support capacity of the ground and structure by driving concrete piles manufactured using centrifugal force into the ground through embedded or driven construction methods and then crushing and leveling the top of the pile to a certain height.

[0003] The concrete pile work process described above can be divided into three parts: ground penetration of the pile using the embedded / type method, pile head preparation, and securing bearing capacity through the connection of the ground and superstructure. Here, pile head preparation is performed by cutting the top of the concrete pile to level the foundation during pile foundation construction after the concrete pile has been driven into the ground.

[0004] When cutting the upper part of a concrete pile as described above, a crusher mounted on construction equipment (such as an excavator) is used to crush it, or the worker cuts it directly with a cutter.

[0005] Here, when cutting using a crusher mounted on construction equipment (such as an excavator), there is a problem that the cut surface is not smooth, and when a worker directly cuts with a cutter, there are problems such as the occurrence of safety accidents (cuts, etc.), the occurrence of safety accidents such as the worker slipping and being electrocuted due to the rise of groundwater in the concrete pile foundation surface, and the poor horizontal state of the cut surface depending on the worker's work skill level.

[0006] To solve the above-mentioned problem, registered patent no. 10-1780591, 'concrete pile head cutting device', was disclosed.

[0007] In the case of the above-mentioned technology, after fixing to the concrete pile is performed by the first and second clamp arms, the cutting part placed under the first and second clamp arms advances to the concrete pile and performs the cutting operation.

[0008] Here, the first and second clamp arms come into contact with the outer periphery of the concrete pile to secure the concrete pile. At this time, although the diameters of concrete piles used at construction sites vary, the hydraulic pressure applied to the first and second clamp arms to secure the concrete pile is maintained at a constant level. Therefore, the degree of fixation by the first and second clamp arms varies depending on the diameter of the concrete pile, resulting in a problem in which the concrete pile is not properly secured.

[0009] In addition, there is a problem that the movement of the cutting part is limited as the diameter of the concrete pile changes, so that the entire concrete pile cannot be cut.

[0010] To solve the above-mentioned problem, registered patent no. 10-0760869, 'head cutting device for concrete pile', was disclosed.

[0011] In the case of the above-mentioned technology, the concrete pile to be cut is fixed by a fixed cylinder, and a cutting means in the form of a circular saw blade moves around the concrete pile to perform cutting work on the concrete pile.

[0012] When cutting concrete piles with a circular saw blade, the starting and ending positions of the cut are set at the user's discretion.

[0013] However, since the user performs the work at a certain distance from the concrete pile being cut, the user may misjudge the cutting start and end positions of the concrete pile, thereby determining that the cutting is complete before the saw blade reaches the cutting end position, and selecting the end of the work. In this case, the user may discover that the cutting work is not completed after the cutting device is disassembled, which increases the work time and man-hours.

[0014] Referring to registered patent No. 10-1881251, it can be seen that a cutting operation on a concrete pile is performed using a wire saw while wrapping the outer periphery of the concrete pile using the first and second clamp arms.

[0015] Here, when the concrete pile cutting by the wire saw is completed, if the clamping pressure of the concrete pile by the first and second clamp arms is below the required level, the first and second clamp arms cannot clamp the cut concrete pile, causing the cut concrete pile to collapse and the wire saw to become caught, resulting in damage to the wire saw.

[0016] Even when cutting concrete piles using a cutting wheel instead of a wire saw, there is a problem in that the cut concrete pile cannot be clamped, causing the cut concrete pile to collapse, the cutting wheel to become stuck, and the cutting wheel to be damaged.

[0017] The present invention is intended to solve the above-mentioned problem, and the purpose of the present invention is to provide a concrete pile head cutting device that facilitates the cutting operation of a concrete pile by confirming the location of the concrete pile and fixing the concrete pile through first and second clamp arms, and then performing the cutting operation after confirming contact.

[0018] In addition, the present invention aims to provide a concrete pile head cutting device capable of cutting concrete piles without user confirmation, since fixing of concrete piles and initiation of work are performed through separate means.

[0019] In addition, the present invention aims to provide a concrete pile head cutting device that can detect a cutting start position and a cutting end position when performing cutting work on a concrete pile by moving a cutting part along the periphery of the concrete pile, thereby improving cutting work efficiency.

[0020] In addition, the present invention aims to provide a concrete pile head cutting device that performs cutting only on a portion excluding the central region of the concrete pile when performing cutting work on the concrete pile by moving a cutting section along the periphery of the concrete pile, and then enables a clamp arm to clamp and break the concrete pile.

[0021] In order to achieve the above object, the present invention provides a device for cutting an exposed head of a concrete pile fixed in the ground, the device comprising: a main body that moves to the concrete pile as a cutting target by a moving means; first and second clamp arms that are rotatably connected to both sides of the main body in an arc shape and clamp the concrete pile; a cutting unit that rotates along the outer circumference of the concrete pile and cuts the concrete pile; a pile position confirmation unit that confirms the position of the concrete pile and outputs a corresponding signal; a pile contact confirmation unit that contacts the concrete pile and outputs a corresponding signal; and a control unit that controls the operation of the first and second clamp arms and controls the operation of the cutting unit in response to output signals from the pile position confirmation unit and the pile contact confirmation unit.

[0022] The above means of transportation may include an excavator.

[0023] It may further include first and second hydraulic cylinders that allow the first and second clamp arms to rotate.

[0024] It may further include an auxiliary clamp jaw arranged on the inner side of the ends of the first and second clamp arms.

[0025] The above cutting section may include first and second cutting section covers spaced apart vertically and providing a space therebetween, and having a pile introduction groove formed in the front, side covers arranged along the edges of the first and second cutting section covers, a guide frame arranged between the first and second cutting section covers and having a circular groove formed in the front into which the concrete pile is introduced, a cutting frame formed in a circular shape with one side open and movable around the concrete pile at a lower portion of the guide frame, first and second cutting wheels arranged at each end of the cutting frame, and a second moving unit that allows the cutting frame to move on the guide frame.

[0026] The method may further include a cooling water supply nozzle for supplying cooling water to the first and second cutting wheels that perform cutting of the concrete pile.

[0027] The second moving unit may include a driving motor that provides driving force, and a gear that is arranged on the outer circumference of the cutting frame and receives the driving force of the driving motor.

[0028] The cutting frame fixing unit may further be positioned at the tip of the cutting section and into which the edge of the cutting frame moved forward is inserted.

[0029] The above cutting frame fixing unit may include a connecting rod having both ends vertically connected to the first and second cutting section covers, and a frame fixing block disposed on the connecting rod and having a frame insertion groove formed into which an edge of the cutting frame is inserted.

[0030] It may further include a wheel cover disposed on each of the first and second cutting wheels.

[0031] The device may further include a horizontal measuring unit that is placed on the main body and measures a horizontal angle of the main body and outputs a corresponding signal to the control unit.

[0032] The above file location confirmation unit may include a light-projecting means disposed on the side cover to project light, and a light-receiving means disposed on the side cover opposite the side cover on which the light-projecting means is disposed to receive the light projected by the light-projecting means and output a corresponding signal.

[0033] The above light projection means may include a first unit light projection unit and a second unit light projection unit that are arranged at a predetermined distance apart from each other.

[0034] The light receiving means may include a first unit light receiving unit that receives light projected from the first unit light receiving unit and outputs a corresponding signal, and a second unit light receiving unit that is positioned at a predetermined distance from the first unit light receiving unit and receives light projected from the second unit light receiving unit and outputs a corresponding signal.

[0035] The above light receiving means may have a separation distance between the first unit light emitter and the second unit light emitter that is the same as the separation distance between the first unit light receiver and the second unit light receiver.

[0036] The above file contact confirmation unit may include first and second contact sensors that are respectively positioned on the upper and lower portions of the main body and output a contact signal by coming into contact with the outer surface of the concrete pile.

[0037] The control unit may include an operation panel that is operated by a user and controls the operations of the first and second clamp arms and the cutting unit, a control unit that receives output signals from the file position confirmation unit and the file contact confirmation unit and outputs a control signal corresponding to the input signal, and a monitor unit that informs the user of the operation status of the operation panel, a signal input to the control unit, and the control signal.

[0038] The control unit can output an operation signal of the cutting unit when a signal is output from each of the first unit receiver and the second unit receiver after an operation is initiated by a user, and a contact signal of the first and second contact sensors is input.

[0039] In order to achieve the above object, the present invention provides a device for cutting an exposed head of a concrete pile fixed in the ground, comprising: a main body that moves toward the concrete pile as a cutting target by a moving means; first and second clamp arms that are rotatably connected to both sides of the main body in an arc shape and clamp the concrete pile; a cutting unit that moves forward or backward toward the concrete pile and moves along the outer circumference of the concrete pile to cut the concrete pile; an operation position measuring unit that measures an operation state of the cutting unit and outputs a corresponding signal; and a control unit that controls the operation of the first and second clamp arms and controls the operation of the cutting unit in response to an output signal of the operation position measuring unit.

[0040] The above means of transportation may include an excavator.

[0041] It may further include first and second hydraulic cylinders that allow the first and second clamp arms to rotate.

[0042] It may further include an auxiliary clamp jaw arranged on the inner side of the ends of the first and second clamp arms.

[0043] The above cutting section may include first and second cutting section covers spaced apart from each other vertically and providing a space therebetween, and having a pile introduction groove formed in the front, side covers arranged along the edges of the first and second cutting section covers, a guide frame arranged between the first and second cutting section covers and having a circular groove formed in the front into which the concrete pile is introduced, a first moving unit that moves the guide frame forward toward the concrete pile or backward from the concrete pile, a cutting frame formed in a circular shape with one side open and arranged to be movable around the concrete pile along the guide frame, cutting wheels arranged at each end of the cutting frame, and a second moving unit that allows the cutting frame to move on the guide frame.

[0044] The first moving unit may include a guide hydraulic cylinder connected to the rear of the guide frame and forward / backward guide cylinders arranged on the side covers on both sides of the first and second cutting section covers to guide movement of the guide frame.

[0045] The second moving unit may include a driving motor that provides driving force, and a gear that is arranged on the outer circumference of the cutting frame and receives the driving force of the driving motor.

[0046] The cutting wheel may further include a cooling water supply nozzle for supplying cooling water to the cutting wheel that performs cutting of the concrete pile.

[0047] The above cutting section may further include a cutting frame fixing unit into which the edge of the cutting frame moved forward is inserted.

[0048] The above cutting frame fixing unit may include a connecting rod having both ends vertically connected to the first and second cutting section covers, and a frame fixing block disposed on the connecting rod and having a frame insertion groove formed into which an edge of the cutting frame is inserted.

[0049] A wheel cover disposed on the above cutting wheel may be further included.

[0050] The above-described motion position measuring unit may include a first sensor that measures the rotation start position arrangement state of the cutting frame and outputs a corresponding signal, a second sensor that measures the movement amount of the guide frame by the first moving unit and outputs a corresponding signal, a third sensor that measures the movement amount of the cutting frame on the guide frame and outputs a corresponding signal, fourth and fifth sensors that are respectively arranged on both ends of the guide frame and detect when the cutting frame reaches the rotation end position and output a corresponding signal, and an encoder that measures the rotation amount of the cutting wheel and outputs a corresponding signal.

[0051] The control unit may include an operation panel that is operated by a user and controls the operations of the first and second clamp arms and the cutting unit, a control unit that receives output signals from the file position confirmation unit and the file contact confirmation unit and outputs a control signal corresponding to the input signal, and a monitor unit that informs the user of the operation status of the operation panel, a signal input to the control unit, and the control signal.

[0052] The rotation end position of the cutting frame can be set at a position having an angular distance of 80° on each side of the rotation start position of the cutting frame.

[0053] In order to achieve the above-mentioned object, the present invention provides a device for cutting the exposed head of a concrete pile, which includes a cavity formed in the inner center, a spaced portion along the circumference of the cavity, and a reinforcing portion formed along the circumference of the spaced portion, the device comprising: a main body that moves toward the concrete pile as a cutting target by a moving means; first and second clamp arms that are rotatably connected to both sides of the main body in an arc shape and clamp the concrete pile; a cutting portion that moves forward or backward toward the concrete pile and moves along the outer circumference of the concrete pile to cut the concrete pile; and a control portion that controls the operation of the first and second clamp arms and controls the operation of the cutting portion; wherein the control portion controls the cutting portion to cut from the outer circumference of the concrete pile to the reinforcing portion.

[0054] The above means of transportation may include an excavator.

[0055] It may further include first and second hydraulic cylinders that allow the first and second clamp arms to rotate.

[0056] It may further include an auxiliary clamp jaw arranged on the inner side of the ends of the first and second clamp arms.

[0057] The above cutting section may include first and second cutting section covers spaced apart from each other vertically and providing a space therebetween, and having a pile introduction groove formed in the front, side covers arranged along the edges of the first and second cutting section covers, a guide frame arranged between the first and second cutting section covers and having a circular groove formed in the front into which the concrete pile is introduced, a first moving unit that moves the guide frame forward toward the concrete pile or backward from the concrete pile, a cutting frame formed in a circular shape with one side open and movable around the concrete pile at a lower portion of the guide frame, first and second cutting wheels arranged at each end of the cutting frame, respectively, and a second moving unit that allows the cutting frame to move on the guide frame.

[0058] The first moving unit may include a guide hydraulic cylinder connected to the rear of the guide frame and forward / backward guide cylinders arranged on the side covers on both sides of the first and second cutting section covers to guide movement of the guide frame.

[0059] The method may further include a cooling water supply nozzle for supplying cooling water to the first and second cutting wheels that perform cutting of the concrete pile.

[0060] The second moving unit may include a driving motor that provides driving force, and a gear that is arranged on the outer circumference of the cutting frame and receives the driving force of the driving motor.

[0061] The cutting frame fixing unit may further be positioned at the tip of the cutting section and into which the edge of the cutting frame moved forward is inserted.

[0062] The above cutting frame fixing unit may include a connecting rod having both ends vertically connected to the first and second cutting section covers, and a frame fixing block disposed on the connecting rod and having a frame insertion groove formed into which an edge of the cutting frame is inserted.

[0063] It may further include a wheel cover disposed on the first and second cutting wheels.

[0064] The control unit may include a numerical storage unit in which numerical values ​​for each section of the concrete pile to be cut are stored, an operation panel that is operated by a user to control the operations of the first and second clamp arms and the cutting unit, a control unit that outputs a control signal according to the numerical values ​​stored in the numerical storage unit, and a monitor unit that informs the user of the operation status of the operation panel, a signal input to the control unit, and the control signal.

[0065] The numerical values ​​for each part of the above concrete pile may include the pile outer diameter, inner cavity diameter, and reinforcing bar diameter.

[0066] The distance between the first cutting wheel and the second cutting wheel may be larger than the diameter of the inner cavity and smaller than the diameter of the reinforcing bar.

[0067] The present invention as described above confirms the location of a concrete pile and the concrete pile, fixes it through the first and second clamp arms, and after contact is confirmed, a cutting operation is performed, so that fixing of the concrete pile and initiation of the operation are performed through a separate confirmation means, so that cutting of the concrete pile can be performed without user confirmation.

[0068] The present invention as described above has the effect of improving the overall cutting work efficiency by enabling the cutting part to move along the periphery of the concrete pile and detecting the cutting start position and the cutting end position when performing cutting work on the concrete pile, so that the user does not have to perform the work of measuring the cutting start position and the end position.

[0069] The present invention, as described above, performs cutting work on a concrete pile by moving a cutting part along the periphery of the concrete pile, thereby performing cutting only on a portion excluding the central region of the concrete pile, thereby preventing the cut portion of the concrete pile from collapsing and the cutting wheel from getting caught during the cutting work.

[0070] In addition, the phenomenon of the cut portion of the concrete pile not being clamped and falling can be prevented even when the clamp pressure of the clamp arm clamping the concrete pile is insufficient during the concrete pile cutting operation.

[0071] Fig. 1 is a plan view showing the configuration of a concrete pile head cutting device according to one embodiment of the present invention.

[0072] FIG. 2 is a side view showing the configuration of a concrete pile head cutting device according to one embodiment of the present invention.

[0073] Fig. 3 is a plan view showing an example of the configuration of the first and second clamp arms used in the present invention.

[0074] Figure 4 is a drawing showing the arrangement of the guide frame and cutting frame included in the cutting section used in the present invention.

[0075] FIG. 5 is a drawing showing the configuration of the first and second cutting part covers and the first moving unit included in the cutting part used in the present invention.

[0076] Figure 6 is a perspective view showing the configuration of a cutting frame fixing unit used in the present invention.

[0077] Figure 7 is a perspective view showing the use of the cutting frame fixing unit illustrated in Figure 6.

[0078] Figure 8 is a block diagram showing the connection relationship of a file position confirmation unit, a file contact confirmation unit, a horizontal measurement unit, and a control unit used in the present invention.

[0079] FIGS. 9 and 10 are drawings illustrating the use of a concrete pile head cutting device according to one embodiment of the present invention.

[0080] Fig. 11 is a plan view showing the configuration of a concrete pile head cutting device according to another embodiment of the present invention.

[0081] Fig. 12 is a side view showing the configuration of a concrete pile head cutting device according to another embodiment of the present invention.

[0082] Fig. 13 is a plan view showing an example of the configuration of the first and second clamp arms used in the present invention.

[0083] Figure 14 is a drawing showing the arrangement of the guide frame, cutting frame, and motion position measuring unit included in the cutting unit used in the present invention.

[0084] FIG. 15 is a drawing showing the configuration of the first and second cutting part covers and the first moving unit included in the cutting part used in the present invention.

[0085] Fig. 16 is a perspective view showing the configuration of a cutting frame fixing unit used in the present invention.

[0086] Figure 17 is a perspective view showing the use of the cutting frame fixing unit illustrated in Figure 16.

[0087] Figure 18 is a block diagram showing the connection relationship between the motion position measurement unit and the control unit used in the present invention.

[0088] Figures 19 to 23 are drawings showing the operation of a concrete pile head cutting device according to the present invention.

[0089]

[0090] Fig. 24 is a plan view showing the configuration of a concrete pile head cutting device according to another embodiment of the present invention.

[0091] Fig. 25 is a side view showing the configuration of a concrete pile head cutting device according to another embodiment of the present invention.

[0092] Fig. 26 is a plan view showing an example of the configuration of the first and second clamp arms used in the present invention.

[0093] Figure 27 is a drawing showing the configuration of a guide frame and a cutting frame included in a cutting section used in the present invention.

[0094] Figure 28 is a drawing showing the configuration of the first and second cutting part covers and the first moving unit included in the cutting part used in the present invention.

[0095] Figure 29 is a perspective view showing the configuration of a cutting frame fixing unit used in the present invention.

[0096] Figure 30 is a perspective view showing the use of the cutting frame fixing unit illustrated in Figure 29.

[0097] Figure 31 is a block diagram showing an example of the configuration of a control unit used in the present invention.

[0098] Figure 32 is a drawing showing each part of a concrete pile to be cut.

[0099] Figures 33 to 36 are drawings showing the operation of a concrete pile head cutting device according to the present invention.

[0100]

[0101] Hereinafter, a preferred embodiment according to the present invention will be described in detail with reference to the attached drawings.

[0102] FIG. 1 is a plan view showing the configuration of a concrete pile head cutting device according to one embodiment of the present invention, and FIG. 2 is a side view showing the configuration of a concrete pile head cutting device according to one embodiment of the present invention.

[0103] Referring to FIGS. 1 and 2, a concrete pile head cutting device (100) according to one embodiment of the present invention includes a main body (110), first and second clamp arms (120A, 120B), a cutting unit (130), a pile position confirmation unit (140), a pile contact confirmation unit (150), a horizontal measurement unit (160), and a control unit (170).

[0104] The main body (110) has a predetermined size and shape.

[0105] The rear end of the main body (110) can be connected to a predetermined moving means (not shown) for moving the cutting device (100) according to the present invention to a cutting work location. Here, the moving means (not shown) can include an excavator.

[0106] Support parts (112) are arranged on the upper and lower parts of the main body (110).

[0107] The support member (112) is formed in the shape of a plate having a predetermined size.

[0108] The front sides of the support member (112) are in contact with the surface of the concrete pile (1) and protrude to a predetermined height to support the concrete pile (1).

[0109] The support members (112) positioned respectively on the upper and lower parts of the main body (110) are made of the same size and shape.

[0110] A file contact confirmation unit (150) described later is placed on the support unit (112).

[0111] The first and second clamp arms (120A, 120B) are interlocked with each other and are fixed to the concrete pile (1) by wrapping around the outer circumference of the concrete pile (1) to be cut from both sides.

[0112] Fig. 3 is a plan view showing an example of the configuration of the first and second clamp arms used in the present invention.

[0113] The first and second clamp arms (120A, 120B) are formed in an arc shape with a predetermined curvature, and one end is rotatably connected to both sides of the main body (110).

[0114] The first and second clamp arms (120A, 120B) are formed to have the same shape and size, and are positioned so that their concave portions face each other.

[0115] The first and second clamp arms (120A, 120B) may be configured by bending a frame into an arc shape. In addition, the first and second clamp arms (120A, 120B) may include a plurality of arc-shaped frames.

[0116] The first and second clamp arms (120A, 120B) can rotate according to changes in the length of the first and second hydraulic cylinders (122A, 122B). One end of the first and second hydraulic cylinders (122A, 122B) can be connected to the first and second clamp arms (120A, 120B) as a rotational axis, respectively, and the other end can be connected to both sides of the main body (100) as a rotational axis.

[0117] It is desirable that the first and second clamp arms (120A, 120B) be interlocked with each other.

[0118] When the length of the first and second hydraulic cylinders (122A, 122B) changes, this is transmitted to the first and second clamp arms (120A, 120B) through the rotation shaft (122A, 122B), causing the first and second clamp arms (120A, 120B) to rotate.

[0119] Meanwhile, auxiliary clamp jaws (124) may be additionally placed on the inner ends of the first and second clamp arms (120A, 120B) to enable clamping of smaller sized concrete piles.

[0120] The cutting section (130) is placed at the bottom of the first and second clamp arms (120A, 120B) to perform cutting work on the concrete pile (1).

[0121] The cutting section (130) includes a guide frame (131), a first moving unit (132), a cutting frame (134), first and second cutting wheels (136A, 136B), a second moving unit, first and second cutting section covers (138A, 138B), and a side cover (139).

[0122] Figure 4 is a drawing showing the configuration of a guide frame and a cutting frame included in a cutting section used in the present invention.

[0123] Referring to Fig. 4, the guide frame (131) is formed in a rectangular shape with a predetermined size, and a circular groove with a predetermined diameter is formed in the front.

[0124] The guide frame (131) is placed around the concrete pile to be cut, and then provides a movement path of the cutting frame (134) described later.

[0125] A concrete pile (1) to be cut can be introduced into the circular groove in front of the guide frame (131).

[0126] The first moving unit (132) moves the guide frame (131) in a straight line so that the guide frame (131) moves forward to the concrete pile (1) or backward from the concrete pile (1).

[0127] The first moving unit (132) includes a guide hydraulic cylinder (132) that is connected to the rear of the guide frame (131) to allow the guide frame (131) to move forward and backward, and a forward and backward guide cylinder (133) that allows the guide frame (131) to move forward and backward in a straight line.

[0128] A detailed description of the configuration of the first moving unit (132) will be described later.

[0129] The cutting frame (134) is formed in a circular shape with the front side open to a predetermined width. A concrete pile (1) to be cut can be introduced into the open portion of the cutting frame (134).

[0130] The size and shape of the cutting frame (134) may correspond to the size and shape of the circular groove at the front of the guide frame (131).

[0131] The cutting frame (134) can move around the concrete pile (1) on the guide frame (131) by the second moving unit described later.

[0132] The first and second cutting wheels (136A, 136B) are respectively positioned at both ends of the cutting frame (134). Each of the first and second cutting wheels (136A, 136B) receives driving force from the second motor (M2) and rotates at a predetermined rotational speed to perform cutting work on the concrete pile.

[0133] Here, in order to enable cutting work to be performed in response to the sizes of various concrete piles (1), it is preferable that the positions of the first and second cutting wheels (136A, 136B) and the second motor (M2) be arranged so as to be changeable.

[0134] It is preferable to place a predetermined wheel cover (137) on each of the first and second cutting wheels (136A, 136B) to prevent fragments generated from the concrete pile (1) from flying in various directions during cutting work.

[0135] The second moving unit provides a predetermined driving force so that the cutting frame (134) can move around the concrete pile (1) from the lower portion of the guide frame (131).

[0136] The second moving unit includes a first motor (M1) and a gear.

[0137] The first motor (M1) receives external power and generates a predetermined driving force. Here, the first motor (M1) is positioned on one side of the guide frame (131), but may be positioned in various locations as long as it can generate driving force and then transmit it to the cutting frame (134).

[0138] A gear (not shown) transmits the driving force of the first motor (M1) to the cutting frame (134), thereby allowing the cutting frame (134) to move along the guide frame (131).

[0139] In this embodiment, the gear is arranged along the outer circumference of the guide frame (131) so as to receive driving force from the driving shaft of the first motor (M1).

[0140] If the driving force of the first motor (M1) can be transmitted to the cutting frame (134), various means such as a chain or roller can be used.

[0141] FIG. 5 is a drawing showing the configuration of the first and second cutting part covers and the first moving unit included in the cutting part used in the present invention.

[0142] The first and second cut covers (138A, 138B) are formed in a rectangular shape with a predetermined size, and a pile introduction groove (1381) into which a concrete pile (1) is introduced is formed in the front. The first and second cut covers (138A, 138B) are formed in the same size and shape.

[0143] The first and second cutting section covers (138A, 138B) are respectively arranged at the top and bottom with a predetermined distance apart. The guide frame (131), the first moving unit (132), the cutting frame (134), the first and second cutting wheels (136A, 136B), the second moving unit, etc. may be arranged on the space between the first and second cutting section covers (138A, 138B).

[0144] The first and second cut covers (138A, 138B) can be arranged so that the long sides of the covers are in the front-back direction.

[0145] Side covers (139) are respectively placed on both sides of the first and second cut covers (138A, 138B). The side covers (139) have a rectangular shape with a predetermined size, and the top and bottom are connected to both sides of the first and second cut covers (138A, 138B).

[0146] Additionally, a file location confirmation unit (140) is placed on the side cover (139). The configuration of the file location confirmation unit (140) will be described later.

[0147] The first and second cutting section covers (138A, 138B) and the side cover (139) can prevent fragments generated from the concrete pile (1) from flying in various directions during cutting work by the first and second cutting wheels (136A, 136B).

[0148] Meanwhile, a cover may be placed on the circular groove side in front of the guide frame (131) to prevent debris generated from the concrete pile (1) from flying out during cutting work.

[0149] One end of the guide hydraulic cylinder (132) can be connected to the rear of the guide frame (131), and the other end can be connected to the lower part of the main body (110).

[0150] The forward / reverse guide cylinder (133) is arranged in the forward / reverse direction of the main body (110) along the side cover (139) described later. When the guide frame (131) moves by the guide hydraulic cylinder (132), the forward / reverse guide cylinder (133) causes the guide frame (131) to move in a straight line forward / backward.

[0151] Meanwhile, the cutting unit (130) used in the present invention further includes a cutting frame fixing unit (1350).

[0152] The cutting frame fixing unit (135) prevents vibration of the first and second cutting wheels (136A, 136B) during the cutting operation by ensuring that the edge of the cutting frame (134) moved toward the concrete pile (1) for the cutting operation is inserted and fixed.

[0153] Figure 6 is a perspective view showing the configuration of a cutting frame fixing unit used in the present invention.

[0154] Referring to FIG. 6, the cutting frame fixing unit (135) includes a connecting rod (1352) and a frame fixing block (1354).

[0155] The connecting rod (1352) is formed in the shape of a circular rod having a predetermined length and diameter. It may also be formed in the shape of a square rod depending on the user's needs.

[0156] Both ends of the connecting rod (1352) are connected to the first and second cut-off covers (138A, 138B), respectively. The connecting rod (1352) is arranged vertically.

[0157] The frame fixing block (1354) is formed in a rectangular prism shape with a predetermined size. The frame fixing block (1354) is placed at a predetermined height on the connecting rod (1352).

[0158] The frame fixing block (1354) has a frame insertion groove (1355) formed on one side into which the edge of the cutting frame (134) is inserted.

[0159] The width of the frame insertion groove (1355) corresponds to the thickness of the cutting frame (134).

[0160] Accordingly, the cutting frame (134) advances toward the concrete pile (1) for cutting work, and the edge of the cutting frame (134) is inserted into the frame insertion groove (1355) as illustrated in Fig. 7. When the edge of the cutting frame (134) is inserted into the frame insertion groove (1355), the vertical vibration of the cutting frame (134) is prevented while the cutting work of the concrete pile (1) is in progress, and the cutting wheel can be prevented from being damaged.

[0161] Although the drawing shows that the cutting frame fixing units (1350) are arranged on both sides of the leading ends of the first and second cutting section covers (138A, 138B), they may be arranged in various numbers at various locations as long as vibration of the cutting frame (134) can be prevented during the cutting operation.

[0162] Figure 8 is a block diagram showing the connection relationship of a file position confirmation unit, a file contact confirmation unit, a horizontal measurement unit, and a control unit used in the present invention.

[0163] The file position confirmation unit (140) confirms whether the concrete pile to be cut is at the cutting position and then outputs a corresponding signal.

[0164] The file location confirmation unit (140) includes a light projection means (1410) and a light receiving means (1430) respectively arranged on opposite side covers (139).

[0165] The location of the concrete pile can be confirmed through the light projection means (1410) and light receiving means (1430) arranged on the side cover (139). The pile location confirmation unit (140) can be placed in various locations, such as the cutting frame (134), as long as the location of the concrete pile can be confirmed.

[0166] A light projection means (1410) is arranged on one side cover (139) and can project a predetermined light toward the opposite side cover. The light projected from the light projection means (1410) can be visible light of a predetermined wavelength or a predetermined laser.

[0167] The light projection means (1410) includes a first unit light projection device (1410A) and a second unit light projection device (1410B) that are arranged at a predetermined distance from each other. In the present embodiment, the first unit light projection device (1410A) and the second unit light projection device (1410B) can be arranged at a predetermined height on the side cover (139).

[0168] The light receiving means (1430) is placed on the side cover (139) on the other side. Here, the side cover (139) on which the light receiving means (1430) is placed is placed opposite to the side cover (139) on which the light projecting means (1410) is placed.

[0169] The light receiving means (1430) receives light projected from the light projecting means (1410) and outputs a light receiving signal.

[0170] The light receiving means (1430) includes a first unit light receiver (1430A) and a second unit light receiver (1430B) that are arranged at a certain distance from each other. The first unit light receiver (1430A) receives light projected from the first unit light projector (1410A), and the second unit light receiver (1430B) receives light projected from the second unit light projector (1410B).

[0171] Here, it is preferable that the separation distance between the first unit receiver (1430A) and the second unit receiver (1430B) be set to be the same as the separation distance between the first unit projector (1410A) and the second unit projector (1410B).

[0172] The file contact confirmation unit (150) contacts the outer periphery of the concrete pile (1) to be cut and outputs a contact signal.

[0173] The file contact verification unit (150) includes first and second contact sensors (152A, 152B).

[0174] The first and second contact sensors (152A, 152B) can be placed at the center of the tip of the support member (112) placed on the upper and lower parts of the main body (110).

[0175] Additionally, the first and second contact sensors (152A, 152B) may be positioned directly on the main body (110) rather than through the support member (112). Additionally, the first and second contact sensors (152A, 152B) may be positioned on the first and second cut-off covers (138A, 138B).

[0176] Meanwhile, the first and second contact sensors (152A, 152B) output a contact signal when they come into contact with the outer surface of the concrete pile (1), but by adding a pressure measuring means, they can be configured to output a contact signal when they come into contact with the outer surface of the concrete pile (1) at a pressure higher than a predetermined pressure.

[0177] Meanwhile, a horizontal measuring unit (160) can be placed on the main body (110).

[0178] The horizontal measurement unit (160) measures the left and right inclination of the main body (110) and outputs a corresponding signal. The horizontal measurement unit (160) can be placed at any location as long as it can measure the inclination of the main body (110), such as the upper surface of the main body (110) or the upper surfaces of the first and second clamp arms (120A, 120B).

[0179] The control unit (170) can control the operation of the first and second clamp arms (120A, 120B). That is, after the main body (110) approaches the concrete pile (1), when the user operates the operation switch (not shown) on the control unit (170), the first and second clamp arms (120A, 120B) can grip the outer periphery of the concrete pile (1).

[0180] In addition, the control unit (170) can receive signals output from the file position confirmation unit (140), the file contact confirmation unit (150), and the horizontal measurement unit (160), and control the operation of the cutting unit (130) in response to the input signals.

[0181] For the above control, the control unit (170) may include an operation panel that performs the operation of the component, a control unit that receives signals output from the file position confirmation unit (140) and the file contact confirmation unit (150) and then outputs a control signal corresponding to the input signal, and a monitor that informs the user of the operation status of the operation panel, the signal input to the control unit, and the control signal output from the control unit.

[0182] Here, a tablet PC of any type may be used as the control unit (170).

[0183] Let us examine the operation of the present invention configured as described above.

[0184] FIGS. 9 and 10 are drawings illustrating the use of a concrete pile head cutting device according to one embodiment of the present invention.

[0185] Here, the first and second contact sensors (152A, 152B) are components placed on the main body (110), but in order to facilitate understanding of the overall operation, they are illustrated as being placed on the cut-off cover.

[0186] Referring to FIG. 9, it can be seen that the main body (110) is approaching the concrete pile (1) to be cut using a moving means (not shown).

[0187] Here, the cutting position of the concrete pile (1) can be marked using various methods, such as using a predetermined marking means or using a separate laser device.

[0188] Although the main body (110) does not approach the concrete pile (1), the concrete pile (1) does not approach the light projection path of the light projection means (1410) and the light receiving means (1430), so no signal is output from the light receiving means (1430).

[0189] Since there is no signal input to the control unit (170), no operation signal is output to the cutting unit (130) even when the user turns the operation switch ON.

[0190] Referring to FIG. 10, after the main body (110) approaches the concrete pile (1) to be cut using the moving means (200), the first and second clamp arms (120A, 120B) can grip the concrete pile (1).

[0191] When the first and second clamp arms (120A, 120B) grip the concrete pile (1), the concrete pile (1) is placed on the light projection path of the light means (1410) and the light receiving means (1430), so it can be seen that the concrete pile has reached the cutting position.

[0192] Additionally, it can be seen that the concrete pile (1) is in contact with the first and second contact sensors (152A, 152B), thereby outputting a contact signal.

[0193] The control unit (170), which receives signals output from the light receiving means (1430) and the first and second contact sensors (152A, 152B), outputs a control signal even when the operation of the cutting means (130) is initiated, so that cutting work on the concrete pile (1) is performed.

[0194] Here, if the inclination angle of the main body (110) and the first and second clamp arms (120A, 120B) connected to the main body (110) is determined to be above a certain range by the horizontal measuring unit (160), the cutting operation can be prevented from being performed.

[0195] The cut concrete pile (1) can be moved to a separate location for processing.

[0196] The present invention confirms the location of a concrete pile and fixes it through first and second clamp arms, and after contact is confirmed, a cutting operation is performed, so that fixing of the concrete pile and initiation of work are performed through a separate confirmation means, so that cutting of the concrete pile can be performed without user confirmation.

[0197]

[0198] Fig. 11 is a plan view showing the configuration of a concrete pile head cutting device according to another embodiment of the present invention, and Fig. 12 is a side view showing the configuration of a concrete pile head cutting device according to another embodiment of the present invention.

[0199] Referring to FIG. 11, a concrete pile head cutting device (200) according to another embodiment of the present invention includes a main body (210), first and second clamp arms (220A, 220B), a cutting unit (230), an operation position measuring unit (240), and a control unit (270).

[0200] The main body (210) has a predetermined size and shape.

[0201] The rear end of the main body (210) can be connected to a predetermined moving means (not shown) for moving the cutting device (200) according to the present invention to a cutting work location. Here, the moving means (not shown) can include an excavator.

[0202] Support parts (212) are arranged on the upper and lower parts of the main body (210).

[0203] The support member (212) is formed in the shape of a plate having a predetermined size.

[0204] The front sides of the support member (212) are in contact with the surface of the concrete pile (1) and protrude to a predetermined height to support the concrete pile (1).

[0205] The support parts arranged on the upper and lower parts of the main body (210) are made of the same size and shape.

[0206] The first and second clamp arms (220A, 220B) are interlocked with each other and are fixed to the concrete pile (1) by wrapping around the outer circumference of the concrete pile (1) to be cut from both sides.

[0207] Fig. 13 is a plan view showing an example of the configuration of the first and second clamp arms used in the present invention.

[0208] The first and second clamp arms (220A, 220B) are formed in an arc shape with a predetermined curvature, and one end is rotatably connected to both sides of the main body (210).

[0209] The first and second clamp arms (220A, 220B) are formed to have the same shape and size, and are positioned so that their concave portions face each other.

[0210] The first and second clamp arms (220A, 220B) may be configured by bending a frame into an arc shape. In addition, the first and second clamp arms (220A, 220B) may include a plurality of arc-shaped frames.

[0211] The first and second clamp arms (220A, 220B) can rotate according to changes in the length of the first and second hydraulic cylinders (222A, 222B). One end of the first and second hydraulic cylinders (222A, 222B) can be connected to the first and second clamp arms (220A, 220B) as a rotational axis, respectively, and the other end can be connected to both sides of the main body (200) as a rotational axis.

[0212] It is desirable that the first and second clamp arms (220A, 220B) be interlocked with each other.

[0213] When the length of the first and second hydraulic cylinders (222A, 222B) changes, this is transmitted to the first and second clamp arms (220A, 220B) through the rotation shaft (222A, 222B), causing the first and second clamp arms (220A, 220B) to rotate.

[0214] Meanwhile, auxiliary clamp jaws (224) may be additionally placed on the inner ends of the first and second clamp arms (220A, 220B) to enable clamping of smaller sized concrete piles.

[0215] The cutting section (230) is placed at the bottom of the first and second clamp arms (220A, 220B) to perform cutting work on the concrete pile (1).

[0216] Here, the cutting section (230) can move forward or backward with respect to the concrete pile (1), move along the outer circumference of the concrete pile (1), and perform cutting of the concrete pile.

[0217] The cutting section (230) includes a guide frame (231), a first moving unit (232), a cutting frame (234), a cutting wheel (236), a second moving unit, first and second cutting section covers (238A, 238B), and a side cover (239).

[0218] Figure 14 is a drawing showing the arrangement of the guide frame, cutting frame, and motion position measuring unit included in the cutting unit used in the present invention.

[0219] Referring to Fig. 14, the guide frame (231) is formed in a rectangular shape with a predetermined size, and a circular groove with a predetermined diameter is formed in the front.

[0220] The guide frame (231) is placed around the concrete pile to be cut, and then provides a movement path for the cutting frame (234) described later.

[0221] A concrete pile (1) to be cut can be introduced into the circular groove in front of the guide frame (231).

[0222] The first moving unit (232) moves the guide frame (231) in a straight line so that the guide frame (231) moves forward to the concrete pile (1) or backward from the concrete pile (1).

[0223] The first moving unit (232) includes a guide hydraulic cylinder (232) that is connected to the rear of the guide frame (231) to allow the guide frame (231) to move forward and backward, and a forward and backward guide cylinder (233) that allows the guide frame (231) to move forward and backward in a straight line.

[0224] The first to fifth sensors (242, 243, 244, 245, 246) are arranged on the guide frame (231) and the first moving unit (232).

[0225] A detailed description of the configuration of the first to fifth sensors (242, 243, 244, 245, 246) and the first moving unit (232) will be described later.

[0226] The cutting frame (234) is formed in a circular shape with the front side open to a predetermined width. A concrete pile (1) to be cut can be introduced into the open portion of the cutting frame (234).

[0227] The size and shape of the cutting frame (234) may correspond to the size and shape of the circular groove at the front of the guide frame (231).

[0228] The cutting frame (234) can move along the guide frame (231) by the second moving unit described later.

[0229] The cutting wheels (236) are respectively positioned at both ends of the cutting frame (234). Each cutting wheel (236) receives driving force from the second motor (M2) and rotates at a predetermined rotational speed to perform cutting work on the concrete pile.

[0230] Here, in order to enable cutting work to be performed in response to the sizes of various concrete piles (1), it is preferable that the positions of the cutting wheel (236) and the second motor (M2) be changeably arranged.

[0231] When cutting with a cutting wheel (236), it is preferable to place a wheel cover (237) on each cutting wheel (236) to prevent fragments generated from the concrete pile (1) from flying in various directions during cutting.

[0232] The second moving unit provides a predetermined driving force so that the cutting frame (234) can move around the concrete pile (1) from the lower portion of the guide frame (231).

[0233] The second moving unit includes a first motor (M1) and a power transmission means (235).

[0234] The first motor (M1) receives external power and generates a predetermined driving force. Here, the first motor (M1) is positioned on one side of the guide frame (231), but may be positioned in various locations as long as it can generate driving force and then transmit it to the cutting frame (234).

[0235] The gear (not shown) transmits the driving force of the first motor (M1) to the cutting frame (234), thereby allowing the cutting frame (234) to move along the guide frame (231).

[0236] In this embodiment, the gear is arranged along the outer circumference of the guide frame (231) to receive the driving force of the drive shaft of the first motor (M1). Various means, such as a chain or roller, can be used as long as the driving force of the first motor (M1) can be transmitted to the cutting frame (234).

[0237] FIG. 15 is a drawing showing the configuration of the first and second cutting part covers and the first moving unit included in the cutting part used in the present invention.

[0238] The first and second cut covers (238A, 238B) are formed in a rectangular shape with a predetermined size, and a pile introduction groove (2381) into which a concrete pile (1) is introduced is formed in the front. The first and second cut covers (238A, 238B) are formed in the same size and shape.

[0239] The first and second cutting section covers (238A, 238B) are respectively arranged at the top and bottom with a predetermined distance apart. The guide frame (231), the first moving unit (232), the cutting frame (234), the cutting wheel (236), the second moving unit, etc., may be arranged on the space between the first and second cutting section covers (238A, 238B).

[0240] The first and second cut covers (238A, 238B) can be arranged so that the long sides of the covers are in the front-back direction.

[0241] Side covers (239) are respectively placed on both sides of the first and second cut covers (238A, 238B). The side covers (239) have a rectangular shape with a predetermined size, and the top and bottom are connected to both sides of the first and second cut covers (238A, 238B).

[0242] The first and second cutting section covers (238A, 238B) and the side cover (239) can prevent fragments generated from the concrete pile (1) from flying in various directions during cutting work using the cutting wheel (236).

[0243] Meanwhile, a cover may be placed on the circular groove side in front of the guide frame (231) to prevent debris generated from the concrete pile (1) from flying out during cutting work.

[0244] One end of the guide hydraulic cylinder (232) can be connected to the rear of the guide frame (231), and the other end can be connected to the lower part of the main body (210).

[0245] The forward / reverse guide cylinder (233) is arranged in the forward / reverse direction of the main body (210) along the side cover (239) described later. When the guide frame (231) moves by the guide hydraulic cylinder (232), the forward / reverse guide cylinder (233) causes the guide frame (231) to move in a straight line forward / backward.

[0246] Meanwhile, the cutting unit (230) used in the present invention further includes a cutting frame fixing unit (2350).

[0247] The cutting frame fixing unit (235) prevents vibration of the cutting wheel (236) during the cutting operation by fixing the edge of the cutting frame (234) that has moved toward the concrete pile (1) for the cutting operation after being inserted.

[0248] Fig. 16 is a perspective view showing the configuration of a cutting frame fixing unit used in the present invention.

[0249] Referring to FIG. 16, the cutting frame fixing unit (235) includes a connecting rod (2352) and a frame fixing block (2354).

[0250] The connecting rod (2352) is formed in the shape of a circular rod having a predetermined length and diameter. It may also be formed in the shape of a square rod depending on the user's needs.

[0251] Both ends of the connecting rod (2352) are connected to the first and second cut-off covers (238A, 238B), respectively. The connecting rod (2352) is arranged vertically.

[0252] The frame fixing block (2354) is formed in a rectangular prism shape with a predetermined size. The frame fixing block (2354) is placed at a predetermined height on the connecting rod (2352).

[0253] The frame fixing block (2354) has a frame insertion groove (2355) formed on one side into which the edge of the cutting frame (234) is inserted.

[0254] The width of the frame insertion groove (2355) corresponds to the thickness of the cutting frame (234).

[0255] Accordingly, the cutting frame (234) advances toward the concrete pile (1) for cutting work, and the edge of the cutting frame (234) is inserted into the frame insertion groove (2355) as illustrated in Fig. 17. When the edge of the cutting frame (234) is inserted into the frame insertion groove (2355), the vertical vibration of the cutting frame (234) is prevented while the cutting work of the concrete pile (1) is in progress, and the cutting wheel can be prevented from being damaged.

[0256] Although the drawing shows that the cutting frame fixing units (2350) are arranged on both sides of the leading ends of the first and second cutting section covers (238A, 238B), they may be arranged in various numbers at various locations as long as vibration of the cutting frame (234) can be prevented during the cutting operation.

[0257] Figure 18 is a block diagram showing the connection relationship between the motion position measurement unit and the control unit used in the present invention.

[0258] The motion position measuring unit (240) measures the motion status of the cutting frame (234) moving along the guide frame (231) and outputs a corresponding signal.

[0259] The motion position measuring unit (240) includes first to fifth sensors (242, 243, 244, 245, 246) and an encoder (248).

[0260] The first sensor (242) measures whether the cutting frame (234) is positioned relative to the origin of the guide frame (231), i.e., the rotation start position, and outputs a corresponding signal. The first sensor (242) is illustrated as being positioned at the inner center of the circular groove of the guide frame (231), but may be positioned at various locations depending on the user's needs.

[0261] The first sensor (242) is placed at a predetermined position on the guide frame (231), and then measures whether the cutting frame (234) is placed at the rotation start position on the guide frame (231) as shown in FIG. 19, and outputs a signal corresponding thereto.

[0262] If it is possible to determine whether the rotation start position on the cutting frame (234) is arranged, the first sensor (242) can be configured in various ways without limitation, such as contact or non-contact.

[0263] The second sensor (243) measures the amount of movement of the guide frame (231) by the first moving unit (232), i.e., the amount of movement of the guide frame (231) moving forward or backward toward the concrete pile (1), and outputs a corresponding signal.

[0264] The third sensor (244) measures the amount of movement of the cutting frame (234) when the cutting frame (234) moves along the guide frame (231) and outputs a corresponding signal.

[0265] In the drawing, the third sensor (244) is shown as being placed on the inner side of the circular groove in front of the guide frame (231), but it can be placed in various positions as long as it can measure the amount of movement of the cutting frame (234).

[0266] The fourth sensor (245) and the fifth sensor (246) detect when the cutting frame (234) moving around the concrete pile along the guide frame (231) reaches a predetermined position and outputs a corresponding signal.

[0267] The fourth sensor (245) and the fifth sensor (246) are arranged opposite each other on the inside of the circular groove of the guide frame (231).

[0268] Here, the fourth sensor (245) and the fifth sensor (246) determine the position at which the cutting frame (234) has moved an angular distance of 80° in a clockwise (CW) or counterclockwise (CCW) direction from the rotation start position as the rotation end position, and output a corresponding signal. If the rotation end position of the cutting frame (234) can be determined, the positions of the fourth sensor (245) and the fifth sensor (246) can be changed according to the user's needs.

[0269] Additionally, if the rotation of the cutting frame (234) can be detected, the fourth sensor (245) and the fifth sensor (246) can perform measurement in various ways, such as contact and non-contact.

[0270] Here, the angular distance between the rotation end position and the rotation start position of the cutting frame (234) detected by the fourth sensor (245) and the fifth sensor (246) can be changed according to the user's needs.

[0271] The encoder (248) measures the rotation speed of the cutting wheel (236) and outputs a corresponding signal to be input to the control unit (270). During the cutting operation, if the cutting wheel (236) does not rotate due to damage to the cutting wheel (236) or a failure of the second motor (M2), the control unit (270), which will be described later, can determine that there is an abnormality in the operation of the cutting wheel (236) based on the signal output from the encoder (248) and output a corresponding control signal.

[0272] The control unit (270) controls the operation of the first and second clamp arms (220A, 220), receives a signal output from the operation position measuring unit (240), and then controls the operation of the cutting unit (230) in response to the input signal.

[0273] The control unit (270) may include an operation panel (272) that performs the operation of the component, a control unit (273) that receives a signal output from the operation position measuring unit (240) and then outputs a control signal corresponding to the input signal, and a monitor (274) that informs the user of the operation status of the operation panel (272), the signal input to the control unit, and the control signal output from the control unit.

[0274] Here, a tablet PC of any type may be used as the control unit (270).

[0275] Let us examine the operation of the present invention configured as described above.

[0276] Figures 19 to 23 are drawings showing the operation of a concrete pile head cutting device according to the present invention.

[0277] To avoid complexity of the drawing and to easily understand the operation of the concrete pile head cutting device according to the present invention, only the concrete pile (1), cutting frame (234), and cutting wheel (236) are shown in the drawing.

[0278] The user manipulates the moving means (not shown) to allow the main body (210) to approach the concrete pile (1) to be cut.

[0279] Here, the cutting position of the concrete pile (1) can be marked using various methods, such as using a predetermined marking means or using a separate laser device.

[0280] Here, it is preferable that the guide frame (231) be positioned further rearward than the main body (210).

[0281] Thereafter, when the tip of the support member (212) placed on the main body (210) comes into contact with the concrete pile (1), as shown in FIG. 19, the user operates the control member (270) to cause the first and second clamp arms (220A, 220) to clamp the concrete pile (1).

[0282] Thereafter, as shown in Fig. 20, the control unit (270) is operated to cause the guide frame (231) to advance toward the concrete pile (1) by the first moving unit (232).

[0283] Here, if it has not been checked whether the cutting frame (234) is positioned at the rotation start position on the guide frame (231), it is desirable to set the position of the cutting frame (234) so ​​that a signal is output from the first sensor (242).

[0284] Here, since the diameter of the concrete pile (1) to be cut and the size of the guide frame (231) of the components included in the concrete pile head cutting device (200) according to the present invention are stored in advance on the control unit (270), it is possible to convert the movement distance by the first moving unit (232) for the tip of the guide frame (231) to reach the outer periphery of the concrete pile (1). Accordingly, when it is determined that the cutting wheel (236) has reached a position where cutting of the concrete pile (1) is possible after the first moving unit (232) has moved a predetermined distance, the operation of the first moving unit (232) can be stopped.

[0285] The movement distance of the first moving unit (232) is measured by the second sensor (243), and when it is determined that the cutting wheel (236) has come into contact with the concrete pile (1), the operation of the first moving unit (232) is stopped.

[0286] In addition, when the tip of the guide frame (231) comes into contact with the concrete pile (1), the operation of the first moving unit (232) stops, and the pressure applied to the first moving unit (232) increases above a certain level. This can be detected and controlled to stop the operation of the first moving unit (232).

[0287] When the control unit (270) determines that the cutting frame (234) has reached the cutting position, the following control signal can be output.

[0288] First, the control unit (270) outputs a control signal to cause the cutting frame (234) to move clockwise and perform cutting work.

[0289] Here, the third sensor (244) measures the amount of movement of the cutting frame (234) and outputs a corresponding signal to the control unit (270), and the control unit (270) can determine the amount of movement per hour of the cutting frame (234) in a predetermined direction according to the output signal of the third sensor (244), and can thereby determine whether the cutting frame (234) is operating normally.

[0290] And, the control unit (270) can determine the position of the cutting frame (234) on the guide frame (231).

[0291] As shown in Fig. 21, according to the control signal output from the control unit (270), the cutting frame (234) moves clockwise, the cutting wheel (236) rotates, and the cutting operation is performed on the concrete pile (1).

[0292] When the rotation of the cutting wheel (236) is initiated and the cutting operation of the concrete pile (1) is in progress, it is preferable to supply cooling water to the cutting wheel through a predetermined cooling water supply nozzle (not shown) to prevent overheating of the cutting wheel (236) and dust diffusion.

[0293] During the movement of the cutting frame (234), if the cutting frame (234) moves an angular distance of 80° from the reference point, the fourth sensor (245) detects this and outputs a corresponding signal to the control unit (270).

[0294] When a signal from the fourth sensor (245) is input to the control unit (270), the control unit (270) stops the movement of the cutting frame (234) in the clockwise direction and then returns it to the original position.

[0295] Thereafter, the control unit (270) outputs a control signal to cause the cutting frame (234) to move counterclockwise and perform cutting work.

[0296] As shown in Fig. 22, according to the control signal output from the control unit (270), the cutting frame (234) moves counterclockwise, the cutting wheel (236) rotates, and the cutting operation is performed on the concrete pile (1).

[0297] When the cutting frame (234) moves by an angular distance of 80° from the reference point during movement of the cutting frame (234), the fifth sensor (246) detects this and outputs a corresponding signal to the control unit (270).

[0298] When the control unit (270) receives the output signal of the fifth sensor (246), it determines that the cutting operation is completed and, as shown in FIG. 23, causes the cutting frame (234) to return to the initial position.

[0299] Afterwards, the first moving unit (232) is controlled to return the guide frame (231) to its original position, and then the cut portion of the concrete pile (1) is lifted and processed.

[0300] The present invention has the effect of improving the overall cutting work efficiency by enabling the cutting part to move along the periphery of a concrete pile and detect the cutting start position and the cutting end position when performing cutting work on the concrete pile, so that the user does not have to perform the work of measuring the cutting start position and the end position.

[0301]

[0302] Fig. 24 is a plan view showing the configuration of a concrete pile head cutting device according to another embodiment of the present invention, and Fig. 25 is a side view showing the configuration of a concrete pile head cutting device according to another embodiment of the present invention.

[0303] Referring to FIG. 24, a concrete pile head cutting device (300) according to another embodiment of the present invention includes a main body (310), first and second clamp arms (320A, 320B), and a cutting section (330).

[0304] And, the concrete pile head cutting device (300) according to one embodiment of the present invention includes a control unit (370).

[0305] With reference to the drawings, the above components will be described.

[0306] The main body (310) has a predetermined size and shape.

[0307] The rear end of the main body (310) can be connected to a predetermined moving means (not shown) for moving the cutting device (300) according to the present invention to a cutting work location. Here, the moving means (not shown) can include an excavator.

[0308] A support member (312) is arranged at the front upper and lower portions of the main body (310).

[0309] The support member (312) is formed in the shape of a plate having a predetermined size.

[0310] The front sides of the support member (312) are in contact with the surface of the concrete pile (1) and protrude to a predetermined length to support the concrete pile (1).

[0311] The upper and lower support parts of the main body (310) are made of the same size and shape.

[0312] The first and second clamp arms (320A, 320B) are interlocked with each other and are fixed to the concrete pile (1) by wrapping around the outer circumference of the concrete pile (1) to be cut from both sides.

[0313] Fig. 26 is a plan view showing an example of the configuration of the first and second clamp arms used in the present invention.

[0314] Referring to Fig. 26, the first and second clamp arms (320A, 320B) are formed in an arc shape with a predetermined curvature, and one end is rotatably connected to both sides of the main body (310).

[0315] The first and second clamp arms (320A, 320B) have the same shape and size, and are positioned so that their concave portions face each other.

[0316] The first and second clamp arms (320A, 320B) may be configured by bending a frame into an arc shape. In addition, the first and second clamp arms (320A, 320B) may include a plurality of arc-shaped frames.

[0317] The first and second clamp arms (320A, 320B) can rotate according to the change in length of the first and second hydraulic cylinders (322A, 322B). One end of the first and second hydraulic cylinders (322A, 322B) can be connected to the first and second clamp arms (320A, 320B) as a rotational axis, respectively, and the other end can be connected to both sides of the main body (310) as a rotational axis.

[0318] It is desirable that the first and second clamp arms (320A, 320B) be interlocked with each other.

[0319] When the length of the first and second hydraulic cylinders (322A, 322B) changes, this is transmitted to the first and second clamp arms (320A, 320B) through the rotation shaft (322A, 322B), causing the first and second clamp arms (320A, 320B) to rotate.

[0320] Meanwhile, auxiliary clamp jaws (324) may be additionally placed on the inner ends of the first and second clamp arms (320A, 320B) to enable clamping of smaller sized concrete piles.

[0321] The cutting section (330) is placed at the bottom of the first and second clamp arms (320A, 320B) to perform cutting work on the concrete pile (1).

[0322] Here, the cutting section (330) can move forward or backward with respect to the concrete pile (1), move along the outer circumference of the concrete pile (1), and perform cutting of the concrete pile.

[0323] The cutting section (330) includes a guide frame (331), a first moving unit (332), a cutting frame (334), first and second cutting wheels (336A, 336B), a second moving unit, first and second cutting section covers (338A, 338B), and a side cover (339).

[0324] Figure 27 is a drawing showing the configuration of a guide frame and a cutting frame included in a cutting section used in the present invention.

[0325] Referring to Fig. 27, the guide frame (331) is formed in a rectangular shape with a predetermined size, and a circular groove with a predetermined diameter is formed in the front.

[0326] The guide frame (331) is placed around the concrete pile to be cut, and then provides a movement path for the cutting frame (334) described later.

[0327] A concrete pile (1) to be cut can be introduced into the circular groove in front of the guide frame (331).

[0328] The first moving unit (332) moves the guide frame (331) in a straight line so that the guide frame (331) moves forward to the concrete pile (1) or backward from the concrete pile (1).

[0329] The first moving unit (332) includes a guide hydraulic cylinder (332) that is connected to the rear of the guide frame (331) to allow the guide frame (331) to move forward and backward, and a forward and backward guide cylinder (333) that allows the guide frame (331) to move forward and backward in a straight line.

[0330] A detailed description of the configuration of the first moving unit (332) will be described later.

[0331] The cutting frame (334) is formed in a circular shape with the front side open to a predetermined width. A concrete pile (1) to be cut can be introduced into the open portion of the cutting frame (334).

[0332] The size and shape of the cutting frame (334) may correspond to the size and shape of the circular groove at the front of the guide frame (331).

[0333] The cutting frame (334) can move around the concrete pile (1) on the guide frame (331) by the second moving unit described later.

[0334] The first and second cutting wheels (336A, 336B) are respectively positioned at both ends of the cutting frame (334). Each of the first and second cutting wheels (336A, 336B) receives driving force from the second motor (M2) and rotates at a predetermined rotational speed to perform cutting work on the concrete pile.

[0335] Here, in order to enable cutting work to be performed in response to the sizes of various concrete piles (1), it is preferable that the positions of the first and second cutting wheels (336A, 336B) and the second motor (M2) be arranged so as to be changeable.

[0336] It is preferable to place a predetermined wheel cover (337) on each of the first and second cutting wheels (336A, 336B) to prevent fragments generated from the concrete pile (1) from flying in various directions during cutting work.

[0337] The second moving unit provides a predetermined driving force so that the cutting frame (334) can move around the concrete pile (1) from the lower portion of the guide frame (331).

[0338] The second moving unit includes a drive motor (M1) and a gear.

[0339] The drive motor (M1) receives external power and generates a predetermined driving force. Here, the drive motor (M1) is placed on one side of the guide frame (331), but may be placed in various locations as long as it can generate the driving force and then transmit it to the cutting frame (334).

[0340] A gear (not shown) transmits the driving force of the driving motor (M1) to the cutting frame (334), thereby allowing the cutting frame (334) to move along the guide frame (331).

[0341] In this embodiment, the gear is arranged along the outer circumference of the guide frame (331) so as to receive driving force from the driving shaft of the driving motor (M1).

[0342] If the driving force of the driving motor (M1) can be transmitted to the cutting frame (334), various means such as a chain or roller can be used.

[0343] Figure 28 is a drawing showing the configuration of the first and second cutting part covers and the first moving unit included in the cutting part used in the present invention.

[0344] The first and second cut covers (338A, 338B) are formed in a rectangular shape with a predetermined size, and a pile introduction groove (3381) into which a concrete pile (1) is introduced is formed in the front. The first and second cut covers (338A, 338B) are formed in the same size and shape.

[0345] The first and second cutting section covers (338A, 338B) are respectively arranged at the top and bottom with a predetermined distance apart. The guide frame (331), the first moving unit (332), the cutting frame (334), the first and second cutting wheels (336A, 336B), the second moving unit, etc. may be arranged on the space between the first and second cutting section covers (338A, 338B).

[0346] The first and second cut covers (338A, 338B) can be arranged so that the long sides of the covers are in the front-back direction.

[0347] Side covers (339) are respectively placed on both sides of the first and second cut covers (338A, 338B). The side covers (339) have a rectangular shape with a predetermined size, and the top and bottom are connected to both sides of the first and second cut covers (338A, 338B).

[0348] The first and second cutting section covers (338A, 338B) and the side covers (339) can prevent fragments generated from the concrete pile (1) from flying in various directions during cutting work by the first and second cutting wheels (336A, 336B).

[0349] Meanwhile, a cover may be placed on the circular groove side in front of the guide frame (331) to prevent debris generated from the concrete pile (1) from flying out during cutting work.

[0350] One end of the guide hydraulic cylinder (332) can be connected to the rear of the guide frame (331), and the other end can be connected to the lower part of the main body (310).

[0351] The forward / reverse guide cylinder (333) is arranged in the forward / reverse direction of the main body (310) along the side cover (339) described later. When the guide frame (331) moves by the guide hydraulic cylinder (332), the forward / reverse guide cylinder (333) causes the guide frame (331) to move in a straight line forward / backward.

[0352] Meanwhile, the cutting unit (330) used in the present invention further includes a cutting frame fixing unit (3350).

[0353] The cutting frame fixing unit (335) prevents vibration of the first and second cutting wheels (336A, 336B) during the cutting operation by ensuring that the edge of the cutting frame (334) moved toward the concrete pile (1) for the cutting operation is inserted and fixed.

[0354] Figure 29 is a perspective view showing the configuration of a cutting frame fixing unit used in the present invention.

[0355] Referring to FIG. 29, the cutting frame fixing unit (335) includes a connecting rod (3352) and a frame fixing block (3354).

[0356] The connecting rod (3352) is formed in the shape of a circular rod having a predetermined length and diameter. It may also be formed in the shape of a square rod depending on the user's needs.

[0357] Both ends of the connecting rod (3352) are connected to the first and second cut-off covers (338A, 338B), respectively. The connecting rod (3352) is arranged vertically.

[0358] The frame fixing block (3354) is formed in a rectangular prism shape with a predetermined size. The frame fixing block (3354) is placed at a predetermined height on the connecting rod (3352).

[0359] The frame fixing block (3354) has a frame insertion groove (3355) formed on one side into which the edge of the cutting frame (334) is inserted.

[0360] The width of the frame insertion groove (3355) corresponds to the thickness of the cutting frame (334).

[0361] Accordingly, the cutting frame (334) advances toward the concrete pile (1) for cutting work, and the edge of the cutting frame (334) is inserted into the frame insertion groove (3355) as illustrated in Fig. 30. When the edge of the cutting frame (334) is inserted into the frame insertion groove (3355), the vertical vibration of the cutting frame (334) is prevented while the cutting work of the concrete pile (1) is in progress, and the cutting wheel can be prevented from being damaged.

[0362] Although the drawing shows that the cutting frame fixing units (3350) are arranged on both sides of the leading ends of the first and second cutting section covers (338A, 338B), they may be arranged in various numbers at various locations as long as vibration of the cutting frame (334) can be prevented during the cutting operation.

[0363] The control unit (370) controls the operation of the first and second clamp arms (320A, 320B) and the operation of the cutting unit (330) to enable cutting of the concrete pile (1).

[0364] Figure 31 is a block diagram showing an example of the configuration of a control unit used in the present invention.

[0365] The control unit (370) may include a numerical storage unit (371), an operation panel (372) that performs the operation of a component, a control unit (373) that receives a signal output from the numerical storage unit (371) and then outputs a control signal corresponding to the input signal, and a monitor (374) that informs the user of the operation status of the operation panel (372), the numerical value stored in the numerical storage unit (371), and the control signal output from the control unit (373).

[0366] The numerical storage unit (371) stores numerical values ​​for each section of the concrete pile (1) to be cut.

[0367] Figure 32 is a drawing showing each part of a concrete pile to be cut.

[0368] Referring to Fig. 32, it can be seen that the concrete pile (1) includes a reinforcing bar (3A) and an internal cavity (3C).

[0369] That is, an internal cavity (3C) of a predetermined diameter is formed in the center of the concrete pile (1), and a reinforcing bar section (3A) with a predetermined thickness is formed around it, in which a plurality of reinforcing bars are arranged. It can be seen that a gap (3B) of a predetermined thickness is formed between the internal cavity (3C) and the reinforcing bar section (3A).

[0370] The numerical storage unit (371) stores the overall diameter (D) of the concrete pile (1), the diameter (D1) of the reinforcing bar portion (3A), and the diameter (D2) of the internal cavity (3C). Here, for convenience of explanation, the diameter of the reinforcing bar portion (3A) is assumed to be the diameter of the innermost portion of the reinforcing bar portion (3A).

[0371] Here, a tablet PC of any type may be used as the control unit (370).

[0372] Let us examine the operation of the present invention configured as described above.

[0373] Figures 33 to 36 are drawings showing the operation of a concrete pile head cutting device according to the present invention.

[0374] To avoid complexity of the drawing and to facilitate understanding of the operation of the concrete pile head cutting device according to the present invention, only the concrete pile (1), the cutting frame (334), and the first and second cutting wheels (336A, 336B) are shown in the drawing.

[0375] Additionally, the shaded portion in the drawing represents a portion cut from the concrete pile (1).

[0376] First, the user manipulates the moving means so that the main body (310) approaches the concrete pile (1) that is the target of cutting.

[0377] Here, it is preferable that the guide frame (331) be positioned further rearward than the main body (310).

[0378] And, after the front of the main body (310) comes into contact with the concrete pile (1), when the user operates the operation panel (312), the first and second clamp arms (320A, 320B) clamp the concrete pile (1).

[0379] When the first and second clamp arms (320A, 320B) clamp the concrete pile (1), the cutting frame (334) placed on the guide frame (331) is placed further from the concrete pile (1) than the first and second clamp arms (320A, 320B).

[0380] Afterwards, the user operates the operation panel (372) to initiate the operation of the cutting unit (330).

[0381] When the operation of the cutting unit (330) is initiated, the first moving unit (332) causes the guide frame (331) to advance toward the concrete pile (1). In addition, the first and second cutting wheels (336A, 336B) also begin to rotate.

[0382] As the guide frame (331) advances toward the concrete pile (1), a cut is made on the concrete pile (1), as shown in Fig. 34.

[0383] When the rotation of the first and second cutting wheels (336A, 336B) is initiated and the cutting operation of the concrete pile (1) is in progress, it is preferable to supply cooling water to the cutting wheels through a predetermined cooling water supply nozzle (not shown) to prevent overheating of the first and second cutting wheels (336A, 336B) and dust diffusion.

[0384] Since the diameter of the concrete pile (1) and the diameter of the reinforcing bar (3A) are stored in the numerical storage unit (371), it is desirable to use the stored numerical values ​​to move the guide frame (331) forward by a distance corresponding to the diameter of the reinforcing bar (3A).

[0385] The control unit (370) causes the guide frame (331) to advance toward the concrete pile (1) by the first moving unit (332).

[0386] Here, since the diameter of the concrete pile (1) to be cut and the size of the guide frame (331) of the components included in the concrete pile head cutting device (300) according to the present invention are stored in advance on the control unit (370), it is possible to convert the movement distance by the first moving unit (332) for the tip of the guide frame (331) to reach the outer periphery of the concrete pile (1). Accordingly, when it is determined that the cutting wheel (336) has reached a position where cutting of the concrete pile (1) is possible after the first moving unit (332) has moved a predetermined distance, the operation of the first moving unit (332) can be stopped.

[0387] In addition, when the tip of the guide frame (331) comes into contact with the concrete pile (1), the operation of the first moving unit (332) stops, and the pressure applied to the first moving unit (332) increases above a certain level. This can be detected and controlled to stop the operation of the first moving unit (332).

[0388] As shown in Fig. 34, by the advancement of the guide frame (331), when the cutting frame (334) moves to the maximum, the control unit (370) operates the drive motor (M1) and gear (335) included in the second moving unit, so that the cutting frame (334) moves left and right around the concrete pile (1) and the cutting operation is performed.

[0389] Referring to Figures 35 and 36, it can be seen that the cutting frame moves around the concrete pile.

[0390] Here, the distance between the first cutting wheel (336A) and the second cutting wheel (336B) arranged at both ends of the cutting frame (1) is larger than the diameter of the inner cavity (3C) and smaller than the diameter of the reinforcing bar (3A), so that cutting is performed from the outer periphery of the concrete pile (1) to the reinforcing bar (3A), and the gap (3B) around the cavity (3C) in the center of the concrete pile (1) remains.

[0391] Afterwards, the guide frame (331) and the cutting frame (334) are returned to their original positions, and the concrete pile (1) is broken by bending the concrete pile (1) based on the cutting portion while the first and second clamp arms (320A, 320B) are clamping the concrete pile (1).

[0392] Afterwards, the cut portion of the concrete pile (1) is moved to another location and loaded.

[0393] The present invention, configured as described above, performs cutting work on a concrete pile by moving a cutting section along the perimeter of the concrete pile, thereby performing cutting only on a portion excluding the central region of the concrete pile, and can prevent the cut portion of the concrete pile from collapsing and the cutting wheel from becoming jammed during the cutting work on the concrete pile. In addition, even when the clamping pressure of the clamp arm clamping the concrete pile is insufficient during the concrete pile cutting work, the phenomenon of the cut portion of the concrete pile not being clamped and falling can be prevented.

[0394] While the present invention has been described with reference to the embodiments illustrated in the drawings, these are merely exemplary, and those skilled in the art will understand that various modifications and equivalent alternative embodiments are possible. Therefore, the true scope of technical protection of the present invention should be determined by the technical spirit of the appended claims.

Claims

1. A device for cutting the exposed head of a concrete pile fixed in the ground. A body moving to the concrete pile as a cutting target by a moving means; First and second clamp arms, each of which is rotatably connected to both sides of the main body in an arc shape and clamps the concrete pile; A cutting section that rotates along the outer circumference of the concrete pile and performs cutting of the concrete pile; A file location confirmation unit that confirms the location of the above concrete file and outputs a corresponding signal; A pile contact confirmation unit that contacts the concrete pile and outputs a corresponding signal; and A concrete pile head cutting device comprising a control unit that controls the operation of the first and second clamp arms and the operation of the cutting unit in response to output signals of the pile position confirmation unit and the pile contact confirmation unit.

2. In paragraph 1, The above moving means is a concrete pile head cutting device including an excavator.

3. In paragraph 1, A concrete pile head cutting device further comprising first and second hydraulic cylinders for causing the first and second clamp arms to rotate.

4. In paragraph 1, A concrete pile head cutting device further comprising an auxiliary clamp jaw disposed on the inner side of the ends of the first and second clamp arms.

5. In paragraph 1, The above cut portion, First and second cutting covers are arranged at a certain distance from each other vertically and horizontally, providing space therebetween, and forming a file introduction groove in the front; A side cover arranged along the edge of the first and second cut portion covers, A guide frame disposed between the first and second cut-off covers and having a circular groove formed in the front into which the concrete pile is introduced; A cutting frame formed in a circular shape with one side open and arranged to be movable around the concrete pile at the bottom of the guide frame, First and second cutting wheels are respectively placed at both ends of the cutting frame, A concrete pile head cutting device including a second moving unit that allows the cutting frame to move on the guide frame.

6. In paragraph 5, A concrete pile head cutting device further comprising a cooling water supply nozzle for supplying cooling water to the first and second cutting wheels that perform cutting of the concrete pile.

7. In paragraph 5, The above second moving unit is, A drive motor that provides driving force, A concrete pile head cutting device including a gear arranged on the outer circumference of the above cutting frame and receiving driving force from the above driving motor.

8. In paragraph 7, It is placed at the tip of the above cut section, A concrete pile head cutting device further comprising a cutting frame fixing unit into which the edge of the cutting frame moved forward is inserted.

9. In paragraph 8, The above cutting frame fixing unit is, A connecting rod having both ends connected vertically to the first and second cut-off covers, A concrete pile head cutting device comprising a frame fixing block disposed on the above connecting rod and having a frame insertion groove formed into which an edge of the cutting frame is inserted.

10. In paragraph 5, A concrete pile head cutting device further comprising a wheel cover disposed on each of the first and second cutting wheels.

11. In paragraph 1, A concrete pile head cutting device further comprising a horizontal measuring unit disposed on the main body and measuring a horizontal angle of the main body and outputting a corresponding signal to the control unit.

12. In paragraph 5, The above file location confirmation part is, A light-projecting means arranged on the above side cover for projecting light, A concrete pile head cutting device including a light receiving means disposed on a side cover opposite to a side cover on which the light projecting means is disposed, the light receiving means receiving light projected from the light projecting means and outputting a corresponding signal.

13. In paragraph 12, The above light projection means, A concrete pile head cutting device comprising a first unit floodlight and a second unit floodlight placed at a predetermined distance apart.

14. In paragraph 13, The above light receiving means, A first unit receiver that receives light projected from the first unit projector and outputs a corresponding signal; A concrete pile head cutting device including a second unit receiver that is positioned at a predetermined distance from the first unit receiver and receives light projected from the second unit projector and outputs a corresponding signal.

15. In paragraph 14, The above light receiving means, A concrete pile head cutting device in which the distance between the first unit light emitter and the second unit light emitter is the same as the distance between the first unit light receiver and the second unit light receiver.

16. In paragraph 15, The above file contact confirmation unit is, A concrete pile head cutting device including first and second contact sensors respectively disposed on the upper and lower parts of the main body and contacting the outer surface of the concrete pile to output a contact signal.

17. In paragraph 16, The above control unit, An operation panel that is operated by a user and controls the operation of the first and second clamp arms and the cutting part, A control unit that receives the output signals of the file position confirmation unit and the file contact confirmation unit and outputs a control signal corresponding to the input signal, A concrete pile head cutting device including a monitor unit that informs a user of the operating status of the above operation panel, a signal input to the above control unit, and the above control signal.

18. In paragraph 17, The above control unit, After the action is initiated by the user, A signal is output from each of the first unit receiver and the second unit receiver, A concrete pile head cutting device that outputs an operation signal of the cutting section when the contact signals of the first and second contact sensors are input.

19. A device for cutting the exposed head of a concrete pile fixed in the ground, A body moving to the concrete pile as a cutting target by a moving means; First and second clamp arms, each of which is rotatably connected to both sides of the main body in an arc shape and clamps the concrete pile; A cutting section that moves forward or backward along the concrete pile and moves along the outer periphery of the concrete pile to cut the concrete pile; A motion position measuring unit that measures the motion status of the above-mentioned cutting unit and outputs a corresponding signal; and A concrete pile head cutting device comprising a control unit that controls the operation of the first and second clamp arms and the operation of the cutting unit in response to an output signal of the operation position measuring unit.

20. In paragraph 19, The above moving means is a concrete pile head cutting device including an excavator.

21. In paragraph 19, A concrete pile head cutting device further comprising first and second hydraulic cylinders for causing the first and second clamp arms to rotate.

22. In paragraph 19, A concrete pile head cutting device further comprising an auxiliary clamp jaw disposed on the inner side of the ends of the first and second clamp arms.

23. In paragraph 19, The above cut portion, First and second cutting covers are arranged at a certain distance from each other vertically and horizontally, providing space therebetween, and forming a file introduction groove in the front; A side cover arranged along the edge of the first and second cut portion covers, A guide frame disposed between the first and second cut-off covers and having a circular groove formed in the front into which the concrete pile is introduced; A first moving unit that moves the guide frame forward to the concrete pile or backward from the concrete pile; A cutting frame formed in a circular shape with one side open and arranged to be movable around the concrete pile along the guide frame, Cutting wheels each placed at both ends of the above cutting frame, A concrete pile head cutting device including a second moving unit that allows the cutting frame to move on the guide frame.

24. In paragraph 23, The above first moving unit, A guide hydraulic cylinder connected to the rear of the above guide frame, A concrete pile head cutting device including forward and backward guide cylinders arranged on the side covers on both sides of the first and second cutting section covers to guide movement of the guide frame.

25. In paragraph 23, The above second moving unit is, A drive motor that provides driving force, A concrete pile head cutting device including a gear arranged on the outer circumference of the above cutting frame and receiving driving force from the above driving motor.

26. In paragraph 23, A concrete pile head cutting device further comprising a cooling water supply nozzle for supplying cooling water to the cutting wheel that performs cutting of the concrete pile.

27. In paragraph 23, The above cut portion, A concrete pile head cutting device further comprising a cutting frame fixing unit into which the edge of the cutting frame moved forward is inserted.

28. In paragraph 27, The above cutting frame fixing unit is, A connecting rod having both ends connected vertically to the first and second cut-off covers, A concrete pile head cutting device comprising a frame fixing block disposed on the above connecting rod and having a frame insertion groove formed into which an edge of the cutting frame is inserted.

29. In paragraph 23, A concrete pile head cutting device further comprising a wheel cover disposed on the above cutting wheel.

30. In paragraph 23, The above motion position measuring unit, A first sensor that measures the rotation start position arrangement status of the above cutting frame and outputs a corresponding signal; A second sensor that measures the movement amount of the guide frame by the first moving unit and outputs a corresponding signal; A third sensor that measures the amount of movement of the cutting frame on the guide frame and outputs a corresponding signal; Fourth and fifth sensors, which are respectively positioned on both ends of the guide frame, detect when the cutting frame reaches the rotation end position and output a corresponding signal; A concrete pile head cutting device including an encoder that measures the rotational amount of the cutting wheel and outputs a corresponding signal.

31. In paragraph 30, The above control unit, An operation panel that is operated by a user and controls the operation of the first and second clamp arms and the cutting part, A control unit that receives the output signals of the file position confirmation unit and the file contact confirmation unit and outputs a control signal corresponding to the input signal, A concrete pile head cutting device including a monitor unit that informs a user of the operating status of the above operation panel, a signal input to the above control unit, and the above control signal.

32. In paragraph 31, The rotation end position of the above cutting frame is: A concrete pile head cutting device set at a position having an angular distance of 80° on each side of the rotation start position of the above cutting frame.

33. A device for cutting the exposed head of a concrete pile above ground, which includes a cavity formed in the inner center, a spaced portion along the perimeter of the cavity, and a reinforcing bar portion formed along the perimeter of the spaced portion, A body moving to the concrete pile as a cutting target by a moving means; First and second clamp arms, each of which is rotatably connected to both sides of the main body in an arc shape and clamps the concrete pile; A cutting section that moves forward or backward along the concrete pile and moves along the outer periphery of the concrete pile to cut the concrete pile; and A control unit that controls the operation of the first and second clamp arms and the operation of the cutting unit; The above control unit, A concrete pile head cutting device that controls the cutting section to cut from the outer periphery of the concrete pile to the reinforcing bar section.

34. In paragraph 33, The above moving means is a concrete pile head cutting device including an excavator.

35. In paragraph 33, A concrete pile head cutting device further comprising first and second hydraulic cylinders for causing the first and second clamp arms to rotate.

36. In paragraph 33, A concrete pile head cutting device further comprising an auxiliary clamp jaw disposed on the inner side of the ends of the first and second clamp arms.

37. In paragraph 33, The above cut portion, First and second cutting covers are arranged at a certain distance from each other vertically and horizontally, providing space therebetween, and forming a file introduction groove in the front; A side cover arranged along the edge of the first and second cut portion covers, A guide frame disposed between the first and second cut-off covers and having a circular groove formed in the front into which the concrete pile is introduced; A first moving unit that moves the guide frame forward to the concrete pile or backward from the concrete pile; A cutting frame formed in a circular shape with one side open and arranged to be movable around the concrete pile at the bottom of the guide frame, First and second cutting wheels are respectively placed at both ends of the cutting frame, A concrete pile head cutting device including a second moving unit that allows the cutting frame to move on the guide frame.

38. In paragraph 37, The above first moving unit, A guide hydraulic cylinder connected to the rear of the above guide frame, A concrete pile head cutting device including forward and backward guide cylinders arranged on the side covers on both sides of the first and second cutting section covers to guide movement of the guide frame.

39. In paragraph 37, A concrete pile head cutting device further comprising a cooling water supply nozzle for supplying cooling water to the first and second cutting wheels that perform cutting of the concrete pile.

40. In paragraph 37, The above second moving unit is, A drive motor that provides driving force, A concrete pile head cutting device including a gear disposed on the outer circumference of the above cutting frame and receiving driving force from the above driving motor.

41. In paragraph 40, It is placed at the tip of the above cut section, A concrete pile head cutting device further comprising a cutting frame fixing unit into which the edge of the cutting frame moved forward is inserted.

42. In paragraph 41, The above cutting frame fixing unit is, A connecting rod having both ends connected vertically to the front end side of the first and second cut-off covers, A concrete pile head cutting device comprising a frame fixing block disposed on the above connecting rod and having a frame insertion groove formed into which an edge of the cutting frame is inserted.

43. In paragraph 37, A concrete pile head cutting device further comprising a wheel cover disposed on the first and second cutting wheels.

44. In paragraph 40, The above control unit, A numerical storage unit in which numerical values ​​for each section of the concrete pile to be cut are stored, An operation panel that is operated by a user and controls the operation of the first and second clamp arms and the cutting part, A control unit that outputs a control signal according to the value stored in the above-mentioned numerical storage unit, A concrete pile head cutting device including a monitor unit that informs a user of the operating status of the above operation panel, a signal input to the above control unit, and the above control signal.

45. In paragraph 44, The figures for each part of the above concrete pile are: Concrete pile head cutting device including pile outer diameter, inner cavity diameter and reinforcing bar diameter.

46. ​​In paragraph 45, The distance between the first cutting wheel and the second cutting wheel is, A concrete pile head cutting device having a diameter larger than the inner cavity diameter and smaller than the diameter of the reinforcing bar.

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