Device for controling tension of tower fall prevention device and method for controlling tension of the same

Abstract

The present invention provides a tension adjustment device, a tower fall prevention device including the same, and a tension adjustment method. The tension adjustment device is connected to the lower end of a lifeline installed on a tower and is applied to adjust the tension of the lifeline. The tension adjustment device includes: i) a tension unit connected to the lifeline and applied to tension the lifeline; ii) a position adjustment unit installed on the tension unit and applied to adjust and fix the position of the tension unit; iii) a tower fixing unit connected to the position adjustment unit and applied to wrap around the tower and fix it to the tower; and iv) a sensing unit interconnected with the tension unit and the lifeline above the tension unit to detect the load applied to the lifeline.

Description

Technology Field

[0001] The present invention relates to a tension adjustment device, a steel tower fall prevention device including the same, and a tension adjustment method. More specifically, the present invention relates to a tension adjustment device capable of preventing wear and burnout of a lifeline, a steel tower fall prevention device including the same, and a tension adjustment method. Background Technology

[0002] Workers are placed in hazardous working environments, such as climbing up and down overhead transmission towers and moving horizontally for construction and maintenance. Therefore, tower fall prevention devices are installed to prevent safety accidents caused by worker falls. Specifically, a fall prevention device attached to the worker's safety harness is connected to a vertical wire. In the event of a fall, the brake on the fall prevention device activates to stop the worker from falling.

[0003] These tower fall prevention devices are not equipped with a mechanism to adjust the tension of the lifeline. If the lifeline is set loosely, it may sway due to mechanical and electrical vibrations in the outdoor environment. If this swaying persists for a long period, fatigue accumulates, and vibrations in the tower intensify, causing wear on the lifeline. As a result, there is a possibility of failure due to damage or disconnection of the lifeline, making it very dangerous in terms of safety and applicability. The problem to be solved

[0004] The present invention aims to provide a tension adjustment device for a steel tower fall prevention device. Furthermore, the present invention aims to provide a steel tower fall prevention device comprising the aforementioned tension adjustment device. Additionally, the present invention aims to provide a method for adjusting the tension of the aforementioned tension adjustment device. means of solving the problem

[0005] A tension adjustment device according to one embodiment of the present invention is connected to the lower end of a lifeline installed on a steel tower and is applied to adjust the tension of the lifeline. The tension adjustment device includes: i) a tension unit connected to the lifeline and applied to tension the lifeline; ii) a position adjustment unit installed on the tension unit and applied to adjust and fix the position of the tension unit; iii) a steel tower fixing unit connected to the position adjustment unit and applied to wrap around the steel tower and fix it to the steel tower; and iv) a sensing unit interconnected with the tension unit and the lifeline above the tension unit to detect the load applied to the lifeline.

[0006] The tensioning unit may include: i) a pinion gear having a first tooth portion formed around it; ii) a rack gear having a second tooth portion formed on one side that meshes with the first tooth portion and extending in the same direction as the direction in which the lifeline is extended; iii) a front ratchet applied to rotate the pinion gear and cause the rack gear to move in a straight line in the tensioning direction of the lifeline when meshed with the pinion gear; iv) a lever handle installed on the front ratchet to operate the front ratchet; v) a rear ratchet installed adjacent to the front ratchet and having a third tooth portion formed on one side that meshes with the first tooth portion when the front ratchet is disengaged from the pinion gear to fix the pinion gear; and vi) an elastic member installed on the other side of the rear ratchet to elastically support the rear ratchet.

[0007] A tension adjustment device according to one embodiment of the present invention may further include a ratchet body that accommodates a pinion gear, a rear ratchet, and an elastic member. The ratchet body may include i) a pinion gear fixing shaft that fixes the pinion gear to rotate axially, and ii) a rear ratchet fixing shaft that fixes the rear ratchet to rotate axially. A lever handle may include a lever bracket connected to rotate axially on both sides of the pinion gear fixing shaft. A front ratchet may include i) a latching portion applied to detachably attach to a first tooth portion, ii) a front ratchet fixing shaft installed within the lever bracket, iii) a recess located adjacent to the latching portion and spaced apart from the first tooth portion, and iv) a seating portion formed around the front ratchet fixing shaft. The front ratchet is fixed to the front ratchet fixing shaft and rotates axially, and the tension unit may further include a ratchet spring installed on the front ratchet fixing shaft to elastically support the front ratchet so that it rotates axially around the front ratchet fixing shaft. When the latch portion is disengaged from the first tooth portion, the rear ratchet may be pushed by the elastic member to rotate axially, causing the third tooth portion to engage with the first tooth portion and block the rotation of the pinion gear. Disengagement of the latch portion from the first tooth portion can be achieved by pulling the lever handle.

[0008] When the latch portion engages with the first tooth portion, pushing the lever handle causes the pinion gear to rotate via the front ratchet, moving the rack gear to tension the lifeline. Depending on the rotation of the pinion gear, the rear ratchet can repeatedly move forward and backward by means of an elastic member. The shape of the first tooth portion and the shape of the third tooth portion may be different. The third tooth portion consists of a pair of teeth, and the pair of teeth have a mutually symmetrical structure, with one surface of each formed in the same direction as the operating direction of the elastic member.

[0009] The rear ratchet further includes a seating groove formed adjacent to the third tooth portion, and can be applied so that the seating portion is aligned with and supported in the seating groove. The depth of the concave portion may be greater than the height of the first tooth portion. The ratchet body further includes an elastic member fixing block including an inclined surface that supports an elastic member, and the inclined surface may face the rear ratchet.

[0010] The position adjustment unit may include: i) a position adjustment body on which a tension unit is installed; ii) a pair of guard portions formed spaced apart from each other on the position adjustment body; iii) a fixing member connected to a ratchet body, penetrating an opening formed in the position adjustment body, and having a first through hole formed in the vertical direction; iv) a positioning axis inserted into an elongated guide groove formed between the pair of guard portions on the position adjustment body and configured to move along the elongated guide groove, penetrating the first through hole; and v) a fixing handle positioned below the fixing member and configured to be screw-coupled to the positioning axis, having a second through hole formed at its center. The positioning axis may include: i) a head portion fixed on the fixing member; and ii) a screw portion connected below the head portion, penetrating the first through hole, and screw-coupled to the fixing handle. The diameter of the fixing handle may be larger than the diameter of the head portion. A pair of groove ledges may be formed spaced apart from each other on the lower side of the head portion and configured to span across both sides of the elongated guide groove.

[0011] The fixing handle may include a protruding portion formed convexly toward the fixing member while surrounding the upper surface of the second through hole. A concave portion may be formed around the lower surface of the first through hole to which the protruding portion is inserted and fixed. The tension adjustment device may further include a connecting unit that interconnects the sensing unit and the lifeline. The connecting unit may include: i) a connecting block into which the lower end of the lifeline is inserted and coupled; ii) a link ball applied such that a coupling screw portion included in the connecting block is inserted into the screw hole and coupled; and iii) a fixing lever bolt applied such that it is inserted into a tightening hole formed in a side groove of the connecting block to rotate the connecting block. The link ball may include: i) a ball bearing; ii) a rotary casing that surrounds the ball bearing and has a screw hole formed on its upper side; and iii) a connecting bolt connected to the ball bearing through an opening formed on the lower side of the rotary casing. The rotary casing may be applied so that it rotates around the ball bearing in correspondence with the rotation of the lifeline. The connecting block may further include a connecting block body part that is coupled to the top of the connecting screw part and has an insertion hole formed at the upper center thereof. A pair of tightening holes are formed and may be spaced apart from each other by a gap formed in the connecting block body part. On the outer side of the lower end of the lifeline, a screw thread corresponding to a screw groove formed inside the insertion hole may be formed.

[0012] The sensing unit includes a load cell, and the load cell can be connected to a rack gear. The length of the elongated guide groove can be 250 mm to 500 mm. The positioning axis can be made of titanium.

[0013] The steel tower fixing unit may include: i) a bending fixing plate that is in close contact with the steel tower; ii) a first fixing plate that is interconnected with the bending fixing plate by a first hinge axis and applied to be in contact with the steel tower; iii) a second fixing plate that is interconnected with the first fixing plate by a second hinge axis and applied to be in contact with the steel tower; iv) a first fastening plate that is connected by crossing one side of the bending fixing plate; and v) a second fastening plate that is connected by crossing one side of the second fixing plate and applied to be joined to face the first fastening plate. The tension adjustment device may further include a control unit that interconnects the position adjustment unit and the steel tower fixing unit and is wirelessly connected to the sensing unit. The control unit may include a display exposed on its outer side. The limit load of the tension unit may be 500 kgf or less.

[0014] A tension adjustment method for a tension adjustment device according to one embodiment of the present invention comprises: i) a step of fixing the tension adjustment device by wrapping the steel tower with a steel tower fixing unit; ii) a step of fixing the tension unit to the position adjustment unit by moving the positioning axis along an elongated guide groove and positioning the connecting unit below the lifeline; iii) a step of connecting and fixing the connecting unit to the lifeline; and iv) a step of tensioning the lifeline by pushing a lever handle to pull the rack gear downward.

[0015] A tension control method of a tension control device according to one embodiment of the present invention may further include a step of checking whether the tension applied to a sensing unit reaches a set range. A tension control method of a tension control device according to one embodiment of the present invention may further include i) a step of pulling a lever handle to return the rack gear to a position where it can be further pulled if the tension applied to the sensing unit does not reach a set range, and ii) a step of repeating the tensioning of the lifeline.

[0016] The maximum value of the setting range may be 1 ton. A tension adjustment method of a tension adjustment device according to one embodiment of the present invention may further include the step of fixing a lever handle when the tension applied to a sensing unit reaches a setting range. In the step of connecting and fixing a connecting unit to a lifeline, after inserting the lower end of the lifeline into the insertion hole, the connecting block may be rotated by a fixing lever bolt to fix the lower end of the lifeline into the insertion hole. Before fixing the lower end of the lifeline into the insertion hole, a connecting screw portion may be inserted into the screw hole of a link ball to form a screw connection.

[0017] In the step of positioning the connecting unit below the lifeline, the fixing handle is rotated to press against the lower side of the fixing member, and the positioning axis moves downward to come into contact with the elongated guide groove, thereby fixing the tensioning unit to the positioning unit. In the step of tensioning the lifeline, the tension applied to the lifeline is measured by the sensing unit, and if the tension exceeds the preset range, an alarm can be generated. In the step of fixing the tension adjustment device, the tension adjustment device can be positioned directly above the ground.

[0018] A steel tower fall prevention device according to one embodiment of the present invention includes i) the aforementioned tension adjustment device and ii) a lifeline device connected to the tension adjustment device and installed on the steel tower. The lifeline device may include i) a lifeline connected to the tension adjustment device and ii) a plurality of lifeline fixing members installed vertically spaced apart on the steel tower and having through holes formed therein to allow the lifeline to pass through spaced apart from the steel tower. Effects of the invention

[0019] It is possible to prevent wear and damage to the lifeline caused by the unstable installation of the tension adjustment device. By using a tension adjustment device with an integrated structure, the quality of tower climbing and descending operations can be improved, and human and material damage caused by external contact accidents can be prevented and suppressed in advance. Power equipment failures and fall accidents during the climbing and descending of transmission towers can be fundamentally prevented. Axial balance can be reinforced by using a link ball in the connecting unit. During on-site setting, the tension of the lifeline can be easily adjusted on the ground where the bottom of the lifeline is located without the use of separate work tools. Brief explanation of the drawing

[0020] FIG. 1 is a schematic installation diagram of a steel tower fall prevention device according to one embodiment of the present invention. FIG. 2 is a schematic perspective view of a tension control device according to one embodiment of the present invention. Figure 3 is a schematic diagram of a tension unit included in the tension control device of Figure 2. Figure 4 is a schematic diagram of the operating state of the tension unit of Figure 3. FIG. 5 is a schematic exploded perspective view of a sensing unit included in the tension control device of FIG. 2. Figure 6 is a schematic hardware structure diagram of a control unit included in the tension control device of Figure 2. FIG. 7 is a schematic flowchart of a tension control method of a tension control device according to one embodiment of the present invention. FIGS. 8 to 12 are schematic diagrams of each step of the tension adjustment method of the tension adjustment device of FIG. 7. FIG. 13 is a schematic partial exploded view of the position adjustment unit of FIG. 9. Figure 14 is a schematic diagram of the usage state of the steel tower fall prevention device of Figure 1. Specific details for implementing the invention

[0021] The technical terms used herein are for the reference of specific embodiments only and are not intended to limit the invention. The singular forms used herein include plural forms unless phrases clearly indicate otherwise. The meaning of "comprising" as used in the specification specifies a particular characteristic, area, integer, step, action, element, and / or component, and does not exclude the presence or addition of other particular characteristic, area, integer, step, action, element, component, and / or group.

[0022] Unless otherwise defined, all terms used herein, including technical and scientific terms, have the same meaning as generally understood by those skilled in the art to which this invention pertains. Terms defined in commonly used dictionaries are further interpreted to have meanings consistent with relevant technical literature and the present disclosure, and are not interpreted in an ideal or highly formal sense unless otherwise defined. For example, the term “applied” described below is interpreted to include both the state in which it is appropriately used and the state prior to appropriate use.

[0023] Expressions described in the singular in this specification may be interpreted as singular or plural unless explicit expressions such as "one" or "single" are used.

[0024] In this specification, terms including ordinal numbers, such as first, second, etc., may be used to describe various components, but said components are not limited by said terms. Such terms are used solely for the purpose of distinguishing one component from another. For example, without departing from the scope of the present disclosure, the first component may be named the second component, and similarly, the second component may be named the first component.

[0025] In the flowchart described with reference to the drawings in this specification, the order of operations may be changed, several operations may be merged or some operations may be divided, and certain operations may not be performed.

[0026] Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings so that those skilled in the art can easily implement the present invention. However, the present invention may be embodied in various different forms and is not limited to the embodiments described herein.

[0027] FIG. 1 schematically shows a steel tower installed in a steel tower fall prevention device (1000) according to one embodiment of the present invention. The installation state of the steel tower fall prevention device (1000) in FIG. 1 is merely for illustrating the present invention and is not limited thereto. Accordingly, the installation state of the steel tower fall prevention device (1000) can be modified differently.

[0028] As illustrated in FIG. 1, the tower fall prevention device (1000) includes a tension adjustment device (100) and a lifeline device (200). In addition, the tower fall prevention device (1000) may include other components. The tension adjustment device (100) is positioned directly above the ground so that a worker can easily operate it.

[0029] The lifeline device (200) includes a lifeline (2001) and a lifeline holder (2003). In addition, the lifeline device (200) may include other components. The lifeline (2001) is spaced apart from the tower (T). The lifeline holder (2003) is installed on the tower (T) spaced vertically apart. The lifeline (2001) is installed on the tower (T) by passing through the lifeline holder (2003). Steel wire may be used as the lifeline (2001). The steel wire is manufactured by twisting 19 strands of steel wire, and its diameter may be 9 mm to 10 mm. The lifeline holder (2003) may be manufactured from steel having excellent durability and strength. The tower (T) may be, for example, a transmission tower.

[0030] The tension adjustment device (100) is connected to the lifeline device (200). More specifically, the tension adjustment device (100) is connected to the lifeline (2001) to adjust the tension of the lifeline (2001). Since the lifeline (2001) is set by being pulled taut rather than loosely, it is not affected by mechanical and electrical vibrations generated in the transmission line supported by the tower (T). Conversely, if the lifeline is kept in a loose state and fatigue accumulates, causing vibrations in the tower to increase, the lifeline will wear out. Consequently, the possibility of failure due to damage to the lifeline or disconnection increases, making the working environment for the worker very dangerous. In one embodiment of the present invention, this problem can be solved by adjusting the tension of the lifeline (2001) using the tension adjustment device (100). The tension adjustment device (100) will be described in detail below.

[0031] FIG. 2 schematically illustrates a tension control device (100) according to one embodiment of the present invention. The structure of the tension control device (100) of FIG. 2 is merely for illustrating the present invention and is not limited thereto. Accordingly, the structure of the tension control device (100) can be modified differently.

[0032] The tension control device (100) includes a tension unit (10), a tower fixing unit (20), a position adjustment unit (30), a connection unit (40), a control unit (50), and a sensing unit (60). In addition, the tension control device (100) may include other parts.

[0033] The tension unit (10) is connected to a lifeline (2001) (shown in FIG. 1, hereinafter the same) and tensions the lifeline (2001). The limit load of the tension unit (10) may be 500 kgf or less. Therefore, under this load range, a worker can operate and use the tension unit (10).

[0034] The tower fixing unit (20) is connected to the position adjustment unit (30). That is, the tower fixing unit (20) is connected to the position adjustment unit (30) through the control unit (50). The tower fixing unit (20) wraps around the tower (T) (shown in FIG. 1, same hereinafter) and is fixed to the tower (T).

[0035] A tension unit (10) is installed in the position adjustment unit (30). The position adjustment unit (30) adjusts and fixes the position of the tension unit (10). That is, the tension unit (10) can be fixed in an appropriate position by moving the position adjustment unit (30) in the direction of the left and right arrows.

[0036] The connecting unit (40) interconnects the sensing unit (60) and the lifeline (2001). The tension adjustment device (100) can be securely connected to the lifeline (2001) using the connecting unit (40).

[0037] The control unit (50) interconnects the position adjustment unit (30) and the tower fixing unit (20). The control unit (50) is wirelessly connected to the sensing unit (60). For example, the control unit (50) can be wirelessly connected to the sensing unit (60) using a method such as Bluetooth. As a result, the tension of the lifeline measured by the sensing unit (60) is converted into a digital signal and transmitted to the control unit (50). The control unit (50) includes a display (501) exposed on the outside. The load of the lifeline (2001) (shown in FIG. 1, hereinafter the same) measured by the sensing unit (60) can be displayed through the display (501). The control unit (50) measures the tension applied to the lifeline by the sensing unit (60), and if the tension exceeds a preset range, it generates an alarm. That is, if the tension of the lifeline (2001) measured by the sensing unit (60) is too low or too high, this can be displayed on the display (501) so that the worker can take appropriate measures. In addition, the control unit (50) can notify a manager located far away from the tower via wireless communication. Since the detailed operation process of this control unit (50) can be easily understood by a person with ordinary knowledge in the technical field to which the present invention belongs, a detailed description thereof is omitted.

[0038] The sensing unit (60) is positioned on the tension unit (10). The sensing unit (60) interconnects the tension unit (10) and the lifeline (2001). As a result, the sensing unit (60) can detect the tension applied to the lifeline (2001) and transmit it to the control unit (50).

[0039] FIG. 3 schematically illustrates the planar operating state of the tension unit (10) included in the tension control device (100) of FIG. 2. The operating state of the tension unit (10) in FIG. 3 is merely for illustrating the present invention and is not limited thereto. Accordingly, the operating state of the tension unit (10) can be modified differently. For convenience of explanation, the lever bracket (1091) is cut in half to show its interior.

[0040] As illustrated in FIG. 3, the tension unit (10) includes a pinion gear (101), a rack gear (103), a ratchet body (105), a front ratchet (107), a lever handle (109), a rear ratchet (111), and an elastic member (113). In addition, the tension unit (10) may include other parts.

[0041] A first tooth section (1011) is formed around the pinion gear (101). A second tooth section (1031) is formed along the z-axis direction on one side of the rack gear (103). The rack gear (103) extends in the same direction as the lifeline (2001) (shown in FIG. 1, hereinafter the same) extends, that is, in the z-axis direction. Since the first tooth section (1011) meshes with the second tooth section (1031), the rotational motion of the pinion gear (101) is converted into the linear motion of the rack gear (103). The pinion gear (101) and the rack gear (103) can be manufactured from machine structural carbon steel (SM45C).

[0042] The ratchet body (105) includes a pinion gear fixing shaft (1051), a rear ratchet fixing shaft (1053), and an elastic member fixing block (1055). In addition, the ratchet body (105) may include other parts. The ratchet body (105) accommodates a pinion gear (101), a rear ratchet (111), and an elastic member (113). In addition, the ratchet body (105) may accommodate other parts. The pinion gear fixing shaft (1051) fixes the pinion gear (101) so that the pinion gear (101) rotates axially. The rear ratchet fixing shaft (1053) fixes the rear ratchet (111) so that the rear ratchet (111) rotates axially.

[0043] As illustrated in FIG. 3, the front ratchet (107) can be engaged with the pinion gear (101). In this case, the front ratchet (107) can cause the pinion gear (101) to move linearly in the direction of the rack gear (103) in the direction of the -z axis, which is the tension direction of the lifeline (2001) (illustrated in FIG. 1, hereinafter the same). The front ratchet (107) includes a latch portion (1071), a front ratchet fixing shaft (1073), a concave portion (1075), and a seating portion (1077). In addition, the front ratchet (107) may include other parts. The front ratchet (107) rotates axially around the front ratchet fixing shaft (1073). The latch portion (1071), the concave portion (1075), and the seating portion (1077) form the outer shape of the front ratchet (107).

[0044] The latch portion (1071) is applied to the first tooth portion (1011) of the pinion gear (101) to be detachable. That is, by pushing the lever handle (109), the latch portion (1071) engages with the first tooth portion (1011) to rotate the pinion gear (101) and convert this into linear motion of the rack gear (103). Meanwhile, when the lever handle (109) is pulled, the latch portion (1071) can be detached from the first tooth portion (1011).

[0045] The front ratchet fixing shaft (1073) is installed within the lever bracket (1091). That is, the front ratchet fixing shaft (1073) is stably fixed to the lever bracket (1091) by running across the interior of the lever bracket (1091). As a result, the front ratchet fixing shaft (1073) can properly operate the front ratchet (107) in accordance with the operation of the lever handle (109). The front ratchet (107) is fixed to the front ratchet fixing shaft (1073) and rotates axially.

[0046] The concave portion (1075) is located adjacent to the latch portion (1071). The concave portion (1075) is spaced apart from the first tooth portion (1011). Furthermore, the depth of the concave portion (1075), that is, the vertical length from the highest point of the latch portion (1071) to the lowest point of the concave portion (1075), is greater than the height of the first tooth portion (1011). Therefore, since no interference occurs due to contact between the concave portion (1075) and the first tooth portion (1011), the latch portion (1071) can be firmly coupled with the first tooth portion (1011).

[0047] The seating portion (1077) is formed around the front ratchet fixing shaft (1073). The seating portion (1077) is formed by the side and bottom surfaces of the front ratchet (107) intersecting and meeting. When the front ratchet (107) retracts while pulling the lever handle (109), the seating portion (1077) is supported by aligning with the seating groove (1113) of the rear ratchet (111). As a result, the front ratchet (107) pushes the rear ratchet (111), releasing the connection between the rear ratchet (111) and the pinion gear (101), and instead, the latch portion (1071) is coupled to the pinion gear (101), thereby securing the pinion gear (101).

[0048] A ratchet spring (117) is installed on a front ratchet fixed axis (1073). The ratchet spring (117) elastically supports the front ratchet (107). As a result, the front ratchet (107) rotates axially in a clockwise or counterclockwise direction around the front ratchet fixed axis (1073). If the front ratchet (107) rotates excessively in a specific direction, it returns to its original position by the elastic force of the ratchet spring (117). Thus, the tension unit (10) can be operated stably.

[0049] A front ratchet (107) is installed on the lever handle (109). The lever handle (109) operates in a lever manner and acts the front ratchet (107). The lever handle (109) includes a lever bracket (1091). The lever handle (109) is connected to rotate axially on both sides of the pinion gear fixed shaft (1051). As a result, the lever handle (109) can rotate around the pinion gear fixed shaft (1051) in the same way as the pinion gear (101).

[0050] The rear ratchet (111) is installed adjacent to the front ratchet (107). One side of the rear ratchet (111) faces the front ratchet (107), and the other side of the rear ratchet (111) faces the elastic member fixing block (1055). A third tooth section (1111) is formed on one side of the rear ratchet (111). The third tooth section (1111) consists of a pair of teeth, and the pair of teeth have a mutually symmetrical structure. One side of each of the pair of teeth is formed in the same direction as the operating direction of the elastic member (113). Since the third tooth section (1111) has a different shape from the first tooth section (1011), the rear ratchet (111) is more easily disengaged from the pinion gear (101), except in the case where the front ratchet (107) disengages from the pinion gear (101).

[0051] An elastic member (113) is installed on the other side of the rear ratchet (111). That is, the elastic member (113) is installed on the inclined surface (1055a) of the elastic member fixing block (1055) to elastically support the rear ratchet (111). The inclined surface (1055a) faces the rear ratchet (111). The elastic member (113) may be a spring and may be made of stainless steel. That is, the pinion gear (101) can be firmly fixed by engaging with the rear ratchet (111) by the elastic force of the elastic member (113) installed on the inclined surface (1055a) of the elastic member fixing block (1055) facing the rear ratchet (111). When the lever handle (109) is pushed to the maximum, the front ratchet (107) can be disengaged from the pinion gear (101). This will be explained in detail below with reference to FIG. 4.

[0052] FIG. 4 schematically illustrates the operating state of the tension unit (10) of FIG. 3. More specifically, FIG. 4 (a) shows the rack gear (103) in a stopped state, FIG. 4 (b) shows the state in which the rack gear (103) is pulled by pushing the lever handle (109) to rotate the pinion gear (101), and FIG. 4 (c) shows the state in which the lever handle (109) is pushed all the way and then pulled back to its original position. The enlarged circles of FIG. 4 each show the internal structure of the ratchet body (105). The operating state of the tension unit (10) of FIG. 4 is merely for illustrative purposes of the present invention and is not limited thereto. Therefore, the operating state of the tension unit (10) can be modified differently.

[0053] First, as illustrated in FIG. 4(a), the lever handle (109) is pulled in the direction of the arrow. In this case, the front ratchet (107) is disengaged from the pinion gear (101) and moves backward while rotating together with the lever handle (109) in the direction of the arrow, that is, clockwise. The rear ratchet (111) is pushed by the elastic member (113) and rotates axially, engaging with the pinion gear (101) to block the rotation of the pinion gear (103). Therefore, the pinion gear (101) does not operate.

[0054] Next, as illustrated in FIG. 4(b), when the lever handle (109) is pushed in the direction of the arrow, the front ratchet (107) engages with the pinion gear (101) and rotates the pinion gear (101). In this case, the rack gear (103) moves in a straight line in the direction of the arrow, that is, downward, thereby tensioning the lifeline (2001) (illustrated in FIG. 1, hereinafter the same). The rear ratchet (111) contacts the pinion gear (101) by the elastic force of the elastic member (113), but since the third tooth part (1111) and the first tooth part (1011) are not in a perfect matched relationship, the rear ratchet (111) repeatedly moves forward and backward by the elastic member (113). As a result, the pinion gear (101) disengages well from the rear ratchet (111), so the pinion gear (101) rotates well by the front ratchet (107). After pushing the lever handle (109) all the way to pull the rack gear (103) to the desired degree, it returns to the state of (c) in Fig. 4.

[0055] That is, as illustrated in FIG. 4(c), the front ratchet (107) is seated on and fixed to the rear ratchet (111). That is, since the front ratchet (107) does not operate, the pinion gear (101) and the rack gear (103) also remain in a fixed state. Although not illustrated in FIG. 4(c), a separate part may be further provided to lock the lever handle (109) so that it does not move.

[0056] FIG. 5 schematically shows a disassembled sensing unit (60) included in the tension control device (100) of FIG. 2. The disassembled structure of the sensing unit (60) in FIG. 5 is merely for illustrating the present invention and is not limited thereto. Accordingly, the operating state of the sensing unit (60) can be modified differently.

[0057] As illustrated in FIG. 5, the sensing unit (60) includes a load cell (601), a front casing (603), a rear casing (605), a bushing (609), a screw (611), and a connecting rod (607). In addition, the sensing unit (60) may include other components. The load cell (601) is connected to a lifeline (2001) (illustrated in FIG. 1, hereinafter the same) through a connecting unit (40) to measure the tension of the lifeline (2001) and display it on a display (501) (illustrated in FIG. 2, hereinafter the same). As a result, if the tension of the lifeline (2001) deviates from a preset range and is too high or too low, this can be notified to the worker through the display (501) (illustrated in FIG. 2). Additionally, this can be notified to a manager located far away from the tower (T) via wireless communication. Therefore, the tension of the lifeline (2001) can be appropriately adjusted using the tension unit (10). Since this control process can be easily understood by a person with ordinary knowledge in the technical field to which the present invention belongs, a detailed description thereof is omitted.

[0058] As shown by the dotted line in FIG. 5, the front casing (603) and the rear casing (605) are joined together to house the load cell (601) inside. A connecting hole (6011) is formed in the load cell (601) and is screw-coupled with the connecting bolt (4035) (shown in FIG. 10) of the link ball (403) (shown in FIG. 10). As a result, the connecting unit (40) (shown in FIG. 10) and the sensing unit (60) can be securely connected.

[0059] Meanwhile, a connecting rod (607) is connected to the lower side of the load cell (601), and a bushing (609) and a screw (611) are connected to the upper and lower sides, respectively, and the connecting rod (607) is screw-connected to the rack gear (103). Since a large load is applied by the rack gear (103), the connecting rod (607) can be connected more firmly to the rack gear (103) by the bushing (609) and the screw (611). The load cell (601) is connected to the lifeline (2001) at the top and to the rack gear (103) at the bottom by the connecting rod (607). Therefore, since the load cell (601) forms a straight line with the lifeline (2001) and the rack gear (103), the tension applied by the lifeline (2001) and the rack gear (103) can be accurately measured.

[0060] FIG. 6 schematically illustrates the hardware structure of the control unit (50) of FIG. 2. The hardware structure of the control unit (50) of FIG. 6 is merely for illustrative purposes of the present invention and is not limited thereto. Accordingly, the hardware structure of the control unit (50) of FIG. 6 may be modified differently. The control unit (50) has functions such as external noise shielding, self-diagnosis and fault recovery, high precision, an equivalent input method for calibration, RS-422 / 485 communication, and I / V-OUT.

[0061] As illustrated in FIG. 6, the control unit (50) may be implemented as at least one computing device and may execute a computer program containing instructions described to execute an operation according to one embodiment. The hardware of the control unit (50) includes a display (501), one or more processors (503), one or more storage (505), one or more memory (507), one or more communication interfaces (509), and a power supply (511). These may be connected to each other via a bus. In addition, the control unit (50) may include hardware such as input devices and output devices. Furthermore, the control unit (50) may be equipped with various software, including an operating system capable of running the program.

[0062] The display (501) functions as an indicator and can be manufactured as an LCD. The processor (503) controls the operation of the control unit (50). The processor (503) may be various types of microprocessors that process instructions included in a program. For example, the processor (503) may be a CPU (Central Processing Unit), MPU (Micro Processor Unit), MCU (Micro Controller Unit), GPU (Graphic Processing Unit), etc. Storage (507) stores various data, programs, etc. required to execute an operation according to one embodiment. Memory (505) loads the corresponding program so that instructions described to execute an operation according to one embodiment are processed by the processor (503). For example, memory (505) may be a ROM (read-only memory), RAM (random access memory), etc. The communication interface (509) is a wired / wireless communication module and can be linked with an external database via a wired / wireless network. A battery may be used as the power source (511). The battery is rechargeable.

[0063] FIG. 7 is a schematic flowchart of a tension control method of a tension control device (100) according to one embodiment of the present invention. The flowchart of FIG. 7 is merely for illustrating the present invention and is not limited thereto. Accordingly, the flowchart of FIG. 7 may be modified differently.

[0064] Meanwhile, FIGS. 8 to 12 schematically illustrate each step of the tension control method of FIG. 7. The tension control method of FIGS. 8 to 12 is merely for illustrating the present invention and is not limited thereto. Accordingly, the tension control method may be modified differently. Below, each step of FIG. 7 will be described in detail with reference to FIGS. 8 to 12.

[0065] First, in step (S10) of FIG. 7, the steel tower (T) is wrapped with a steel tower unit (20). The tension adjustment device (100) can be fixed to the steel tower (T) using the steel tower unit (20). (Illustrated in FIG. 8)

[0066] FIG. 8 (a) shows the process of wrapping the steel tower (T) with the steel tower fixing unit (20), and FIG. 8 (b) shows the process of fixing the steel tower unit (20) to the steel tower (T).

[0067] As illustrated in FIG. 8(a), the tower fixing unit (20) includes a bending fixing plate (201), a fixing plate (203, 205), a hinge shaft (202, 204), a fastening plate (206, 207), and a fixing lever bolt (208). In addition, the tower fixing unit (20) may include other parts. Here, the fixing plate (203, 205) includes a first fixing plate (203) and a second fixing plate (205), the hinge shaft (202, 204) includes a first hinge shaft (202) and a second hinge shaft (204), and the fastening plate (206, 207) includes a first fastening plate (206) and a second fastening plate (207). Such a tower fixing unit (20) uses a non-corrosive material. For example, titanium, carbon steel for machine structures (SM45C), or stainless steel, which have excellent corrosion resistance and wear resistance, can be used as the material.

[0068] The bent fixing plate (201) is formed in a bent shape. As a result, the bent fixing plate (201) is fixed in close contact with the steel tower (T). The first fixing plate (203) and the bent fixing plate (201) are interconnected by the first hinge shaft (202). Additionally, the first fixing plate (203) and the second fixing plate (205) are interconnected by the second hinge shaft (204). The first fixing plate (203) and the second fixing plate (205) are in contact with the steel tower (T). The first fastening plate (206) is connected by crossing one side of the bent fixing plate (201). For example, the first fastening plate (206) can be connected by crossing the bent fixing plate (201) at a right angle. Additionally, the second fastening plate (207) is connected by crossing one side of the second fixing plate (205). For example, the second fastening plate (207) can be connected to the second fixing plate (205) by crossing it at a right angle. The first fastening plate (206) and the second fastening plate (207) are joined together facing each other. In this case, a fixing lever bolt (208) can be used. As a result, the steel tower fixing unit (20) can be firmly fixed to the steel tower (T).

[0069] Next, in step (S20) of FIG. 7, the positioning axis (305) is moved along the elongated guide groove (3011). That is, the connecting unit (40) is moved directly below the lifeline device (200) to connect the connecting unit (40) to the lifeline device (200). Accordingly, the tension unit (10) located below the connecting unit (40) is moved in the +x axis direction.

[0070] The positioning axis (305) is coupled to the fixed member (115), and the fixed member (115) is connected to the tension unit (10). Thus, the positioning axis (305) can be moved to fix the tension unit (10) to the position adjustment unit (30). Then, the connecting unit (40) is positioned below the lifeline (2001). (Illustrated in FIG. 9)

[0071] As illustrated in FIG. 9, the position adjustment unit (30) includes a position adjustment body (301), a guard part (303), a position determining axis (305), a fixing handle (307), and a fixing member (115). In addition, the position adjustment unit (30) may include other parts. Since the position determining axis (305) needs to move while exposed to an outdoor environment, it may be made of titanium, which has excellent corrosion resistance.

[0072] The position adjustment body (301) forms the basic frame of the position adjustment unit (30). A tension unit (10) is installed in the position adjustment body (301). That is, a fixing member (115) connected to the ratchet body (105) is fixed to the position adjustment body (301) by penetrating the opening (3013) formed in the position adjustment body (301) in the y-axis direction.

[0073] As shown in the enlarged circle of FIG. 9, the guard portions (303) are formed as a pair and positioned spaced apart from each other in the y-axis direction. The guard portions (303) are formed on the position adjustment main body (301). An elongated guide groove (3011) extending along the x-axis direction is formed between the guard portions (303). The positioning axis (305) is inserted into the elongated guide groove (3011) and can move along the elongated guide groove (3011) in the direction of the arrow. The length of the elongated guide groove (3011) may be 250 mm to 500 mm. If the length of the elongated guide groove (3011) is too large, the volume of the tension adjustment device (100) becomes too large. Conversely, if the length of the elongated guide groove (3011) is too small, the degree of freedom of movement of the tension unit (10) may be reduced. Accordingly, the length of the elongated guide groove (3011) is maintained within the aforementioned range. The fixing handle (307) is screw-coupled to the positioning axis (305) and is positioned below the positioning axis (305). Below, the position adjustment unit (30) will be described in more detail through FIG. 13.

[0074] FIG. 13 schematically illustrates the partial disassembly structure of the position adjustment unit (30) of FIG. 9. The enlarged circle of FIG. 13 schematically illustrates the combined state of the position determining axis (305) and the fixing handle (307). The partial disassembly structure of the position adjustment unit (30) of FIG. 13 is merely for illustrating the present invention and is not limited thereto. Accordingly, the partial disassembly structure of the position adjustment unit (30) can be modified differently.

[0075] As illustrated in FIG. 13, the fixing member (115) is connected to the right side of the ratchet body (105) and protrudes in the -y axis direction. A first through hole (1151) is formed in the fixing member (115) in the vertical direction, i.e., in the z-axis direction.

[0076] The positioning axis (305) passes through the first through hole (1151). The positioning axis (305) includes a head portion (3051) and a screw portion (3053). In addition, the positioning axis (305) may include other parts. The head portion (3051) is fixed on the fixing member (115). The screw portion (3053) is connected below the head portion (3051). The screw portion (3053) passes through the first through hole (1151) and is screw-coupled to the fixing handle (307).

[0077] A fixing handle (307) is located below the fixing member (115). A second through hole (3073) is formed in the center of the fixing handle (307). A positioning axis (305) is inserted above the second through hole (3073), and the fixing handle (307) is positioned below the second through hole (3073) to mutually connect the positioning axis (305) and the fixing handle (307).

[0078] The diameter (d307) of the fixing handle (307) is larger than the diameter (d3051) of the head portion (3051). Therefore, since the fixing handle (307) has a large contact area with the fixing member (115), the fixing handle (307) can be firmly attached to the fixing member (115). Furthermore, the fixing handle (307) includes a protruding portion (3071). The protruding portion (3071) is formed convexly toward the fixing member (115) while surrounding the upper surface of the second through hole (3073). Correspondingly, a concave portion (1153) is formed on the fixing member (115). That is, the concave portion (1153) is formed around the lower surface of the first through hole (1151) so that the protruding portion (3071) is inserted and fixed. As a result, the fixing handle (307) can be fixed to the fixing member (115) more firmly.

[0079] Meanwhile, a groove projection (3051a) having a shape similar to a semicircular plate is formed on the lower side of the head portion (3051). The groove projection (3051a) may be formed as a pair spaced apart from each other. The groove projection (3051a) may be placed over both sides of the elongated guide groove (3011) (shown in FIG. 9, hereinafter the same). Thus, the positioning axis (305) can move along the elongated guide groove (3011) by means of the groove projection (3051a), thereby moving the tension unit (10) to stably fix it. As a result, the positioning axis (305) moves downward and contacts the elongated guide groove (3011) while rotating the fixing handle (307) to press against the lower side of the fixing member (115).

[0080] Returning to Fig. 7, in step (S30), the connecting unit (40) is connected to and fixed to the lifeline (2001). (Illustrated in Fig. 10) That is, after inserting the lower end (2001a) of the lifeline (2001) into the insertion hole (4011c), the connecting block (401) is rotated by the fixing lever bolt (4015) to fix the lower end (2001a) of the lifeline (2001) to the insertion hole (4011c). On the outer side of the lower end (2001a) of the lifeline (2001), a second screw thread is formed corresponding to the first screw thread formed on the inner side of the insertion hole (4011c). Thus, as the first screw thread engages with the second screw thread, the lifeline (2001) is coupled with the connecting unit (40).

[0081] In the enlarged circle of FIG. 10, the connecting unit (40) is enlarged and schematically shown in its disassembled structure. The disassembled structure of the connecting unit (40) in the enlarged circle of FIG. 10 is merely for illustrating the present invention and is not limited thereto. Accordingly, the disassembled structure of the connecting unit (40) can be modified differently.

[0082] The connecting unit (40) includes a connecting block (401), a link ball (403), and a fixing lever bolt (4015). In addition, the connecting unit (40) may include other parts. The connecting block (401) includes a connecting block body (4011) and a connecting screw part (4013). In addition, the connecting block (401) may include other parts. The connecting block body (4011) is connected to the connecting screw part (4013). A side groove (4011a), an insertion hole (4011b), and a gap (4011c) are formed in the connecting block body (4011). A tightening hole (4011a1) is formed in the side groove (4011a). The side grooves (4011a) are formed in pairs and are spaced apart from each other by the gap (4011c). The tightening hole (4011a1) communicates with the gap (4011c) formed in the radius of the connecting block main body (4011). The insertion hole (4011b) is formed at the upper center of the connecting block main body (4011). The gap (4011c) is formed corresponding to the radius of the connecting block main body (4011). The fixing lever bolt (4015) can be inserted into the tightening hole (4011a1) and rotated to fix it. Then, the connecting block (401) can be rotated by turning the fixing lever bolt (4015) in the direction of the arrow, and a lifeline can be inserted into the insertion hole (4011b) and screw-coupled. More specifically, a screw thread is formed on the outer side of the lower end of the lifeline, and a screw groove is formed on the inner side of the insertion hole (4011b) in correspondence with this. Thus, the lifeline can be inserted into the insertion hole (4011b) and fixed.

[0083] The link ball (403) includes a rotary casing (4031), a ball bearing (4033), and a connecting bolt (4035). In addition, the link ball (403) may include other parts. A screw hole (4031a) is formed on the upper side of the rotary casing (4031), and an opening (4031b) is formed on the lower side. A connecting screw portion (4013) is inserted into the screw hole (4031a) and screw-coupled to the rotary casing (4031). This screw coupling between the connecting screw portion (4013) and the rotary casing (4031) is performed first before connecting by inserting the lower end of the lifeline into the insertion hole (4011b) of the connecting block (401). That is, if the screw connection between the connecting screw part (4013) and the rotary casing (4031) is made later than the connection of the bottom of the lifeline, the connecting block (401) must be rotated, so the connecting screw part (4013) may be released again from the rotary casing (4031). Therefore, the screw connection between the connecting screw part (4013) and the rotary casing (4031) can be performed first, and the connection between the connecting block (401) and the bottom of the lifeline can proceed naturally as the rotary casing (4031) rotates.

[0084] The rotary casing (4031) encloses the ball bearing (4033) and houses the ball bearing (4033) inside it. A connecting bolt (4035) is connected to the ball bearing (4033) through an opening (4031b). The connecting bolt (4035) is inserted into and secured in the connecting hole (6011) (shown in FIG. 5). When the lifeline rotates due to wind or the like, the rotary casing (4031) rotates around the ball bearing (4033) in response. That is, the rotary casing (4031) can rotate in the direction of the arrow while separated from the ball bearing (4033) and the connecting bolt (4035). As a result, there is no problem such as the connecting unit (40) being twisted by the lifeline.

[0085] Returning to Fig. 7, in step (S40) of Fig. 7, the lever handle (109) is pushed to pull the rack gear (103) in the direction of the arrow to tension the lifeline (2001). (Illustrated in Fig. 11) Then, the tension applied to the load cell (601) (Illustrated in Fig. 5) by the sensing unit (60) is measured and displayed on the display (601).

[0086] In step (S50) of FIG. 7, it is checked whether the tension applied to the sensing unit has reached a set range. If the tension has reached a set range, the lifeline is not loose and is stretched taut, so the tensioning procedure of the lifeline can be stopped. That is, in this case, the process proceeds to step (S70) of FIG. 7 to fix the lever handle and no longer tension the lifeline. Conversely, if the tension has not reached a set range, the process proceeds to step (S60).

[0087] In step (S60), the lever handle (109) is pulled again to further pull the rack gear (103) and return to a position where the lifeline (200) can be further tensioned (as shown in FIG. 12). Then, step (S40) is repeated by pushing the lever handle (109) to pull the rack gear (103) down and tension the lifeline (200).

[0088] Meanwhile, if the repetition of steps (S40) and (S60) continues, the lifeline (200) may be excessively stretched and exceed the tension setting range. In this case, the control unit (50) (shown in FIG. 2) can generate an alarm to prevent an accident caused by this.

[0089] FIG. 14 schematically illustrates the usage state of the steel tower fall prevention device (1000) of FIG. 1. The usage state of the steel tower fall prevention device (1000) of FIG. 14 is merely for illustrative purposes of the present invention and is not limited thereto. Accordingly, the usage state of the steel tower fall prevention device (1000) can be modified differently.

[0090] As illustrated in FIG. 14, a tension control device (100) is wrapped and mounted on a steel tower (T), more specifically on the main structural member of the steel tower. The lifeline device (200) includes a lifeline (2001) and a lifeline fixing member (2003). The lifeline (2001) is connected to a tensioning unit (10) through a connecting unit (40). Thus, the lifeline (2001) is tensioned by the pulling force of the tensioning unit (10) and is kept taut without becoming loose. A through hole (2003a) is formed in the lifeline fixing member (2003) installed on the steel tower (T). Since the lifeline (2001) passes through the through hole (2003a) and is fixed, it is positioned spaced apart from the steel tower (T).

[0091] The worker (W) can proceed with work on the steel tower (T) after firmly securing the connecting device (C), which is connected to the safety line (S) worn on the body, to the lifeline (2001). Even if an accident occurs, such as the work line (M) breaking, the worker's (W) safety can be ensured because the connecting device (C) is supported by the lifeline (2001) which is kept taut.

[0092] Although the present invention has been described as previously stated, those skilled in the art will readily understand that various modifications and variations are possible without departing from the concept and scope of the claims set forth below. Explanation of the symbols

[0093] 10. Seal Unit 101. Pinion Gear 1011, 1031, 1111. Cog 103. Rack Gear 105. Ratchet body 1051. Pinion gear fixed shaft 1053. Rear ratchet locking shaft 1055. Elastic member fixing block 107. Forward ratchet 1071. Latch 1073. Front ratchet fixed shaft 1075. Concave part 1077. Settlement 109. Lever handle 1091. Lever bracket 111. Rear ratchet 1113. Settling Home 113. Elastic member 115. Fixing member 1151, 3073, 2003a. Through hole 1153. Concave area 117. Ratchet spring 20. Steel Tower Fixing Unit 201. Angled fixing plate 202, 204. Hinge axis 203, 205. Fixing plate 206, 207. Fastening plate 208. Fixing lever bolt 30. Position adjustment unit 301. Position adjustment main body 3011. Long-hole guide home 303. Guard Section 305. Positioning Axis 3051. Head section 3051a. Groove 3053. Screw section 307. Fixed handle 3071. Protruding lesion 40. Connection Unit 401. Connection Block 4011. Connecting block main body 4011a. Side groove 4011a1. Clamp 4011b. Insertion hole 4011c. Gap 4013. Connecting screw part 4015. Fixing Lever Bolt 403. Link Ball 4031. Rotary casing 4031a. Screw hole 4031b. Opening 4033. Ball bearing 4035. Connecting bolt 50. Control Unit 501. Display 100. Tension Adjustment Device 200. Lifeline device 2001. Lifeline 2001a. Bottom of the lifeline 2003. Lifeline anchor 50. Control unit 501. Display 503. Processor 505. Memory 507. Storage 509. Communication Interface 60. Sensing Unit 601. Load cell 6011. Connecting hole 603. Anterior casing 605. Rear casing 603a. Opening 607. Connecting rod 609. Bushing 611. Screw 2001. Lifeline 2003. Fixed 2005. Connection line 2007. Lifeline Fixing Device 2007a. Penetrating hole 1000. Steel tower fall prevention device B. Main components of the steel tower C. Connection device M. Workline S. Safety line T. Steel Tower

Claims

Claim 1 A tension adjustment device applied to adjust the tension of a lifeline connected to the lower end of a lifeline installed on a steel tower, the device comprising: a tension unit connected to the lifeline and applied to tension the lifeline; a position adjustment unit installed on the tension unit and applied to adjust and fix the position of the tension unit; a steel tower fixing unit connected to the position adjustment unit and applied to wrap around the steel tower and fix it to the steel tower; and a sensing unit interconnected with the tension unit and the tension unit and the lifeline above the tension unit to detect the load applied to the lifeline, wherein the tension unit comprises: a pinion gear having a first tooth portion formed around it; a rack gear having a second tooth portion formed on one side thereof that meshes with the first tooth portion and extending in the same direction as the extension of the lifeline; a front ratchet applied to rotate the pinion gear to cause the rack gear to move linearly in the tension direction of the lifeline when meshed with the pinion gear; a lever handle installed on the front ratchet to operate the front ratchet; and the front A rear ratchet is installed adjacent to a ratchet and, when the front ratchet is disengaged from the pinion gear, has a third tooth formed on one side that engages with the first tooth and fixes the pinion gear; an elastic member is installed on the other side of the rear ratchet to elastically support the rear ratchet; and a ratchet body that accommodates the pinion gear, the rear ratchet, and the elastic member. The ratchet body includes a pinion gear fixing shaft that fixes the pinion gear to rotate axially, and a rear ratchet fixing shaft that fixes the rear ratchet to rotate axially. The lever handle includes a lever bracket connected to rotate axially on both sides of the pinion gear fixing shaft. The front ratchet includes a latch portion applied to detachably attach to the first tooth, a front ratchet fixing shaft installed within the lever bracket, a recess located adjacent to the latch portion and spaced apart from the first tooth, and a seating portion formed around the front ratchet fixing shaft.A tension adjustment device comprising: the front ratchet is fixed to the front ratchet fixed shaft and rotates axially; and the tension unit further includes a ratchet spring installed on the front ratchet fixed shaft to elastically support the front ratchet so that it rotates axially around the front ratchet fixed shaft. Claim 2 delete Claim 3 delete Claim 4 delete Claim 5 delete Claim 6 A tension adjustment device according to claim 1, wherein when the latching portion is disengaged from the first tooth portion, the rear ratchet is pushed by the elastic member and rotates axially, causing the third tooth portion to engage with the first tooth portion to block the rotation of the pinion gear. Claim 7 In claim 6, a tension adjustment device in which the release of the latching portion from the first tooth portion is achieved by pulling the lever handle. Claim 8 A tension adjustment device according to claim 1, wherein when the latch portion engages with the first gear portion, pushing the lever handle causes the pinion gear to rotate by the front ratchet and the rack gear to move to tension the lifeline. Claim 9 In claim 8, a tension control device in which the rear ratchet repeatedly moves forward and backward by the elastic member according to the rotation of the pinion gear. Claim 10 In claim 9, the shape of the first toothed part and the shape of the third toothed part are different tension control devices. Claim 11 In claim 10, the third tooth portion is composed of a pair of teeth, and the pair of teeth have a mutually symmetrical structure, and each has one surface formed in the same direction as the operating direction of the elastic member, forming a tension control device. Claim 12 A tension adjustment device according to claim 1, wherein the rear ratchet further includes a seating groove formed adjacent to the third tooth portion, and the seating portion is applied to be aligned with and supported in the seating groove. Claim 13 A tension control device according to claim 1, wherein the depth of the concave portion is greater than the height of the first tooth portion. Claim 14 In claim 1, the ratchet body further comprises an elastic member fixing block including an inclined surface that supports the elastic member, and the inclined surface is a tension adjusting device facing the rear ratchet. Claim 15 In claim 1, the position adjustment unit comprises a position adjustment body on which the tension unit is installed, a pair of guard members formed spaced apart from each other on the position adjustment body, a fixing member connected to the ratchet body and penetrating an opening formed in the position adjustment body and having a first through hole formed in the vertical direction, a position determining axis inserted into an elongated guide groove formed between the pair of guard members on the position adjustment body and configured to move along the elongated guide groove and penetrating the first through hole, and a fixing handle positioned below the fixing member and configured to be screw-coupled to the position determining axis, with a second through hole formed at its center. Claim 16 In claim 15, the positioning axis comprises a head portion fixed above the fixed member and a screw portion connected below the head portion and passing through the first through hole to be screw-coupled to the fixed handle, forming a tension adjusting device. Claim 17 In paragraph 16, a tension adjustment device in which the diameter of the fixed handle is larger than the diameter of the head portion. Claim 18 A tension adjustment device according to claim 16, wherein a pair of groove ridges are formed on the lower side of the head portion, spaced apart from each other and applied to span over both sides of the elongated guide groove. Claim 19 In claim 15, the fixing handle includes a protruding portion formed convexly toward the fixing member while surrounding the upper surface of the second through hole, and a concave portion formed around the lower surface of the first through hole into which the protruding portion is inserted and fixed, forming a tension adjusting device. Claim 20 In claim 15, the tension adjustment device further comprises a connecting unit that interconnects the sensing unit and the lifeline, and the connecting unit comprises a connecting block into which the lower end of the lifeline is inserted and coupled, a link ball applied such that a coupling screw portion included in the connecting block is inserted into the screw hole and coupled, and a fixing lever bolt applied such that it is inserted into a tightening hole formed in a side groove of the connecting block and rotates the connecting block. Claim 21 In paragraph 20, the link ball comprises a ball bearing, a rotary casing surrounding the ball bearing with the screw hole formed on the upper side thereof, and a connecting bolt connected to the ball bearing through an opening formed on the lower side of the rotary casing, and a tension control device applied such that the rotary casing rotates around the ball bearing in accordance with the rotation of the lifeline. Claim 22 In claim 20, the tension adjusting device further comprises a connecting block body portion that is coupled to the connecting screw portion and has an insertion hole formed at its upper center. Claim 23 In paragraph 22, the tension adjustment device is formed such that the tightening holes are formed in pairs and are spaced apart from each other by a gap formed in the main body of the connecting block. Claim 24 In paragraph 22, a tension adjustment device having a screw thread formed on the outer side of the lower end of the above lifeline that corresponds to a screw groove formed on the inner side of the insertion hole. Claim 25 In claim 1, the sensing unit includes a load cell, and the load cell is a tension adjustment device connected to the rack gear. Claim 26 In claim 15, a tension adjusting device in which the length of the above-mentioned elongated guide groove is 250 mm to 500 mm. Claim 27 In paragraph 15, the above positioning axis is a tension control device made of titanium. Claim 28 In claim 1, the steel tower fixing unit comprises a bending fixing plate that is in close contact with the steel tower, a first fixing plate that is interconnected with the bending fixing plate by a first hinge shaft and applied to be in contact with the steel tower, a second fixing plate that is interconnected with the first fixing plate by a second hinge shaft and applied to be in contact with the steel tower, a first fastening plate that is connected by crossing one side of the bending fixing plate, and a second fastening plate that is connected by crossing one side of the second fixing plate and applied to be joined to face the first fastening plate. Claim 29 In claim 28, the tension adjustment device interconnects the position adjustment unit and the tower fixing unit, and further includes a control unit wirelessly connected to the sensing unit, wherein the control unit includes a display exposed on its outer side. Claim 30 A tension control device according to claim 1, wherein the limit load of the tension unit is 500 kgf or less. Claim 31 A tension adjustment method for a tension adjustment device according to claim 22, comprising the steps of: wrapping the steel tower with the steel tower fixing unit to fix the tension adjustment device; moving the positioning axis along the elongated guide groove to fix the tension unit to the position adjustment unit and positioning the connecting unit below the lifeline; connecting and fixing the connecting unit to the lifeline; and pushing the lever handle to pull the rack gear downward to tension the lifeline. Claim 32 A tension control method according to claim 31, further comprising the step of checking whether the tension applied to the sensing unit reaches a set range. Claim 33 A tension adjustment method according to claim 32, further comprising the steps of: pulling the lever handle to return the rack gear to a position where it can be further pulled when the tension applied to the sensing unit has not reached a set range; and repeating the tensioning of the lifeline. Claim 34 In paragraph 33, a tension control method in which the maximum value of the above-mentioned setting range is 1 ton. Claim 35 A tension control method according to claim 32, further comprising the step of fixing the lever handle when the tension applied to the sensing unit reaches a set range. Claim 36 A tension adjustment method according to claim 31, wherein, in the step of connecting and fixing the connecting unit to the lifeline, the lower end of the lifeline is inserted into the insertion hole, and then the connecting block is rotated by the fixing lever bolt to fix the lower end of the lifeline to the insertion hole. Claim 37 In paragraph 36, a tension adjustment method in which the connecting screw portion is inserted into the screw hole of the link ball and screw-coupled before fixing the lower end of the lifeline to the insertion hole. Claim 38 A tension adjustment method according to claim 31, wherein, in the step of positioning the connecting unit below the lifeline, the fixing handle is rotated to press against the lower side of the fixing member, and the positioning axis moves downward to contact the elongated guide groove, thereby fixing the tension unit to the position adjustment unit. Claim 39 In claim 31, a tension control method wherein, in the step of tensioning the lifeline, the tension applied to the lifeline by the sensing unit is measured, and if the tension exceeds a preset range, an alarm is generated. Claim 40 In claim 31, a tension adjustment method in which, in the step of fixing the tension adjustment device, the tension adjustment device is positioned directly above the ground. Claim 41 A steel tower fall prevention device comprising a tension adjustment device according to any one of claims 1 and 6 to 30, and a lifeline device connected to the tension adjustment device and installed on the steel tower. Claim 42 In claim 41, the above lifeline device comprises a lifeline connected to the tension adjustment device, and a plurality of lifeline fixing members installed vertically spaced apart on the steel tower and having through holes formed to allow the lifeline to pass through spaced apart from the steel tower.

Images