JP6164585B2 - Parent rope tension device and parent rope tension method - Google Patents

Description

  The present invention relates to a master rope tension device for stretching a master rope to which a safety belt of an operator who works on a carrier bed of a lorry is connected, and a parent rope tension method using the master rope tension device.

  According to the Occupational Health and Safety Law, when working at a height of 2m or more (such as construction sites), it is obliged to take measures to prevent the worker from falling, such as attaching a safety belt to the worker. .

  On the other hand, for workers who work on the platform of a truck such as a truck, if the height of the platform is less than the height stipulated by the law, it is outside the scope of the law. There are many accidents due to falling, and from the viewpoint of preventing such danger, in order to bridge the main line where the safety belt of the worker working on the cargo truck's cargo bed is connected to the cargo truck's cargo bed, Proposal has been proposed for a master rope tension device to be mounted on the loading platform.

  Patent Document 1 discloses a structure in which a strut for stretching a master rope can be folded, an upper strut above the lower strut can be extended, and the master rope can be stretched in two stages in a truck fall prevention device installed on a truck bed. Is disclosed.

  Patent Document 2 discloses a configuration in which a support column is erected on an attachment member that is detachably attached to a side wall plate (a tilt plate) of a truck bed.

  Patent document 3 is disclosing the structure which attaches two support | pillars before and behind a loading platform, and spans a horizontal member (including a master rope) between both support | pillars.

  In Patent Document 4, two stretchable struts are attached at appropriate positions on the loading platform, a master rope is stretched over the tip of the strut, and each strut is supported by support members from both sides in order to reinforce the strength of each strut. The configuration is disclosed.

  Patent document 5 is disclosing the structure of the support | pillar which can extend / contract in the support | pillar for extending a master rope on a loading platform.

JP2013-099385A JP 2009-0661192 A JP 2003-093531 A JP 7-127240 A Utility Model Registration No. 3102725

  Since the master rope stretched over the loading platform of the lorry is in a lower position compared to the case where it is stretched at a high construction site, it needs to be stretched with a stronger tension. If the tension is weak and the deflection of the master rope due to the fall of the worker is large, the fall prevention action does not work before the operator falls to the ground due to the deflection of the master rope, and the fall of the worker cannot be prevented completely There is. In fact, when a load of an operator weighing 85 kg is applied to a parent rope (length: 10 m) of a tension of about 40 kgf that is applied at a general construction site in a high place, the parent rope bends by about 2 m. If the master rope erected on the loading platform of the lorry bends 2 meters, the worker's safety cannot be sufficiently achieved due to the height relationship with the ground.

  In this way, when the master rope is stretched on the platform of a lorry, it is necessary to stretch the master rope with a stronger tension and reduce its deflection, but the master rope is stretched with a strong tension. When doing so, it is necessary to fix the support | pillar for stretching the parent rope firmly to such extent that it can withstand the tension. The above Patent Documents 1-5 disclose a configuration in which a strut for stretching the master rope is attached to the loading platform, and the strut is firmly attached to the loading platform so that the master rope can be stretched with a stronger tension. The structure to be fixed is not disclosed.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a parent leash tension device capable of firmly fixing a strut for straddling a parent rope to a cargo bed and a parent leash tension method using the parent leash tension device. is there.

The first structure of the master rope tensioning device of the present invention is a master rope tensioning device for stretching a master rope to which a safety belt of an operator who works on the cargo carrier's carrier is connected. A mounting member that is disposed on each of the left and right sides and is detachably attached to the side wall plate of the cargo bed; and a column that is erected on each mounting member; and the mounting member has a surface facing the outer side surface of the side wall plate of the cargo bed. A first member having a second member having a surface facing the inner surface of the side wall plate of the loading platform, and attached to each of the first member and the second member according to the thickness of the side wall plate By engaging the rack, the first member and the second member are coupled so that the distance between the first member and the second member can be adjusted, and the side wall of the loading platform in the second member On the surface facing the inner surface of the plate, the upper part is opened to accommodate the column. The mouthed box is fixed and attached, and the column is supported by being vertically inserted into the box along the surface facing the inner surface of the side wall plate of the loading platform in the second member. in the left and right sides with respect to the direction, by a plurality of bolts arranged in the vertical direction, the surface facing the inner surface of the cargo bed side walls of the second member with the box is pressed, Ru is fixed to the side wall plate of the loading platform It is characterized by that.

  According to a second configuration of the master rope tensioning device of the present invention, in the first configuration, the strut is a first strut that supports a master rope that is stretched in the front-rear direction of the lorry, and the first strut It is characterized in that it is formed by integrating in parallel a second support column that has a different length from the support column and supports a master rope that is stretched in the left-right direction of the truck.

  According to a third configuration of the parent rope tensioner of the present invention, in the first configuration, the support column includes a frame body having a hollow portion through which the support column passes, and the frame body is variable in height to the support column. The master rope to be stretched is supported by the master rope support device fixed to the frame and attached to the frame body.

  According to a fourth configuration of the master rope tensioning device of the present invention, in the third configuration, the support column includes a first support column supporting the master rope stretched in the front-rear direction of the cargo vehicle, and the cargo vehicle. It is formed by integrating in parallel a second support that supports the master rope that is stretched in the left-right direction, and the frame passes through the integrated first support and the second support. The height is fixed to the integrated first support column and the second support column in a variable manner.

  According to a fifth configuration of the parent rope tensioning device of the present invention, in any one of the first to fourth configurations, a hook for fastening an auxiliary rope stretched between the columns on a side surface of the column. Is provided.

  According to a sixth configuration of the master rope tensioning device of the present invention, in any one of the first to fifth configurations, further, the tension of the master rope stretched between the upper ends of the columns is maintained. Provided with a belt-shaped cargo tightening machine, wherein one end side of the master rope is fixed to a predetermined position of the lorry through an upper end portion of one strut, and the other end side of the master rope has an upper end portion of the other strut It is attached to one end side of the cargo tightening machine, and the other end side of the cargo tightening machine is fixedly attached to a predetermined position of the truck.

  The parent rope tensioning method of the present invention is a parent rope tensioning method using the parent rope tensioning device having the above sixth configuration, wherein a tension meter for measuring the tension of the parent rope is connected to the cargo tightening machine. In parallel with the other end of the master rope, tighten the operation of the tightening machine so as to maintain the tension measured by the tension meter, and remove the tension meter after the tightening operation of the tightening machine. It is characterized by.

  According to the parent rope tensioning device and the parent rope tensioning method of the present invention, it becomes possible to attach the mounting member that supports the column to the tilting board in accordance with the thickness (width) of the tilting board of the loading platform. It is possible to firmly fix the mounting member that supports the column for stretching the frame to the tilt plate of the loading platform.

It is a figure which shows the usage pattern (side) of the parent leash tension apparatus in embodiment of this invention. It is a figure which shows the usage type (back) of the parent leash tension apparatus in embodiment of this invention. It is a figure which shows the installation position of a parent leash tension apparatus. It is a perspective view which shows the structural example of the attachment member of the parent rope tension device in embodiment of this invention. It is a figure which shows sectional drawing of the attachment member 20 attached to the tilting board 4. FIG. It is a perspective view which shows the structural example of the parent-tension stretcher installed in the loading platform front side. It is a figure which shows the 1st structural example of the support | pillar 30 of the parent leash tension apparatus in embodiment of this invention. It is a figure which shows the structural example of two integrated support | pillars. FIG. 5 is a diagram illustrating a second configuration example of a support column 30. It is a figure which shows the support | pillar 30 of the 2nd structural example which integrated two support | pillars.

  Embodiments of the present invention will be described below with reference to the drawings. However, such an embodiment does not limit the technical scope of the present invention.

  FIG. 1 and FIG. 2 are diagrams showing a usage pattern of the master rope tension device in the embodiment of the present invention. FIG. 1 is a side view of a lorry on which a parent rope stretcher is installed, and FIG. 2 is a view of the lorry on which a parent rope stretcher is installed as viewed from the rear. The parent rope tensioning device is used to stretch a master rope for connecting a safety belt of a worker who performs work on a carrier of a transport vehicle such as a truck to the carrier of the transport vehicle. In FIG. 1, a truck as a transport vehicle includes a vehicle body front portion 2 including a driver's seat and a cargo bed 3 behind the vehicle body. A side plate and a side plate of the loading platform 3 are provided with a tilt plate (side wall plate) 4 that can be opened and closed with a lower edge connected to the loading platform 3 as a rotation axis.

  When working on the cargo bed 3 of the truck, the worker wears a safety belt. The safety belt includes a belt portion to be worn around the waist of the worker, a rope portion extending from the belt portion, and a hook portion provided at the tip of the rope portion. And, in a state where the hook portion of the safety belt is connected to the master rope spanned in the front-rear direction or the left-right direction above the loading platform of the truck using the master rope tension device in the present embodiment, Will work.

  FIG. 3 is a diagram showing the installation position of the master rope tension device, and is a schematic view of the loading platform 3 as viewed from above. The master rope tensioning device 10 is fixed to and installed at the four corners of the cargo bed 3, respectively, on the tilt plate (side wall plate) 4, and the master rope 5 is stretched in the front-rear direction along the tilt plates 4 on the left and right sides. Moreover, it is hung in the left-right direction along the tilting plate 4 behind the loading platform.

  The parent rope tensioning device 10 includes an attachment member 20 that is detachably attached to a tilt plate (side wall plate) of a cargo bed, and a column 30 that is erected on each attachment member. The mounting member 20 is attached to the tilting plates 4 near the four corners of the loading platform 3 (the tilting plate portions on the left and right sides of the rear portion of the loading platform and the tilting plate portions on the left and right sides of the loading platform front portion). Each attachment member 20 is provided with a support column 30, and the master rope 5 is stretched between the support columns 30 along the front-rear direction or the left-right direction of the edge of the loading platform 3.

  FIG. 3 is a perspective view showing a configuration example of an attachment member of the master rope tension device in the present embodiment. Further, FIG. 5 is a diagram showing a cross-sectional view of the attachment member 20 attached to the tilt plate 4. The mounting member 20 includes a first member 21 having a surface facing the outer surface of the tilt plate (side wall plate) 4 of the loading platform 3 and a second member having a surface facing the inner surface of the tilt plate 4 of the loading platform 3. 22, and a pair of racks 13, 14 attached to the first member 21 and the second member 22 according to the thickness of the tilt plate 4, respectively. The first member 21 and the second member 22 are coupled so that the distance from the member 22 can be adjusted.

  The first member 21 is an L-shaped steel plate member bent at a right angle, and when attached to the tilt plate 4, the surfaces forming the right angle are respectively on the outer surface of the tilt plate 4 and the upper surface of the tilt plate 4. Face.

  The second member 22 also has an L-shaped steel plate member bent at a right angle, and when attached to the tilt plate 4, the surfaces forming the right angle are respectively on the inner surface of the tilt plate 4 and the upper surface of the tilt plate 4. Face.

  Racks 13 and 14 are attached by welding to the surfaces facing the upper surface of the tilt plate 4 of each of the first member 21 and the second member 22 (hereinafter referred to as the horizontal plane) at two positions respectively. The horizontal positions of the first member 21 and the second member 22 are overlapped and connected by adjusting the meshing positions of the racks 13 and 14 according to the thickness of the tilt plate 4. When the second horizontal plane is superimposed on the horizontal plane of the first member 21, a bolt hole is provided in the horizontal plane of the first member 21, and a nut is attached to the back side of the bolt hole by welding. In the second horizontal plane, an elongated hole extending in the thickness direction of the tilt plate 4 is provided at a position facing the bolt hole, and depending on the overlapping position of the racks 13, 14, bolts are formed from the elongated hole to the bolt hole. Are inserted, and the horizontal surfaces are fixed with bolts together with the racks. For example, the racks 13 and 14 preferably have a total length of about 100 mm, a tooth width of 20 mm, and a meshing height of about 23 mm, but various dimensions and shapes can be appropriately selected.

  Thus, the attachment member 20 of the parent rope tensioning device 10 according to the present embodiment is the two members 11 and 12 that are fixedly attached to the tilt plate by connecting them using the rack so as to sandwich the plate. It is done. Therefore, although the thickness of the tilt plate differs depending on the type of the truck, it is possible to attach the mounting member 20 in close contact with the tilt plate 4 in accordance with the thickness of the tilt plate, so that it can be attached more firmly. Thus, the strut 30 to which a greater load is applied can be fixed and supported by the master rope being stretched with a stronger tension.

  A box 22 a for supporting the support column 30 is provided on a surface (hereinafter, referred to as a vertical surface) facing the inner surface of the tilt plate 4 in the second member 22. The box 22a is formed using a steel plate, and is attached to the vertical surface of the second member 22 by welding, for example. The box 22a has an opening at the top for inserting the column 30. In the example of FIG. 4, the box 22a is formed so as to accommodate two columns. The master rope tension device shown in FIG. 4 is installed on the rear side of the loading platform 3, and one of the two struts is used to hang the master rope in the front-rear direction, and the other is the parent Used to hang the rope in the left-right direction. The vertical surface of the second member 22 is formed to extend longer vertically downward than the vertical surface of the first member 21 in order to support the box 22a. The vertical surface of the second member 22 is provided with a plurality of bolt holes arranged in the vertical direction on both sides of the box 22a. As shown in the drawing, the contact plate 7 is placed in the gap between the vertical surface of the second member 22 and the tilt plate 4, and the vertical surface is pressed against the contact plate 7 with a bolt, and the second member 22 is pressed. Is fixed to the tilt plate 4. The contact plate 7 is a steel plate, and rubber is lined on the side facing the inner wall surface of the tilt plate. When there is a step on the inner wall surface of the tilt plate, a plurality of divided cover plates 7 may be prepared, and a separate cover plate 7 may be arranged for each step.

  FIG. 6 is a perspective view showing a configuration example of a parent rope tensioner installed on the front side of the loading platform. The parent rope tensioner installed on the front side of the loading platform 3 is formed with a box 22a that accommodates a single column. A box 22a that accommodates one strut that supports only the master rope stretched in the front-rear direction is sufficient for the master rope tension device on the front side of the loading platform.

  FIG. 7 is a diagram illustrating a first configuration example of the strut 30 of the parent rope tensioner according to the embodiment of the present invention. The column 30 is a square pipe (for example, 50 mm square) having a square cross section of about 1.3 m to 2 m in length, and is made of a metal such as stainless steel or aluminum having a necessary strength. The lower end portion of the support column 30 not shown is inserted into the box 22a of the second member 22, and the upper end portion of the support column 30 is attached with the pulley 31 and the escape preventing metal fitting 32 surrounding the upper side of the pulley 31. Yes. The master rope is passed between the upper side of the pulley 31 and the escape prevention fitting 32 and is supported on the pulley 31. Further, the auxiliary rope hooks 33 are arranged at a plurality of locations at predetermined intervals on the side surface of the support column. The auxiliary rope is fastened to the hook 33 for the auxiliary rope, and the auxiliary rope is stretched between the columns at a position lower than the position where the parent rope is stretched, that is, the height of the worker's body. Can be prevented from falling. Preferably, the safety is further improved by stretching a plurality of auxiliary ropes.

  The two struts 30 inserted into the box 22a of the parent rope tensioner 10 on the rear side of the loading platform may be integrated by welding or the like in advance.

  FIG. 8 is a diagram illustrating a configuration example of two integrated struts. Two support columns 30 in the first configuration example are bonded in parallel. The lengths of the support column 30 for the front and rear direction and the length of the support column 30 for the left and right direction are made different, the lower end positions of the respective support columns are aligned, the positions of the pulley 31 and the escape prevention metal fitting 32 at the upper end portion are shifted, and further, the pulley 31 and the escape prevention The direction of the metal fitting 32 is also shifted by 90 degrees and integrated.

  FIG. 9 is a diagram illustrating a second configuration example of the support column 30, in which FIG. 9A is a top view and FIG. 9B is a side view. The second configuration example shown in FIG. 9 is a configuration in which the position of the pulley 31 can be made variable. The column 30 includes a cylindrical body 35 that is attached to the column 30 so that the position of the column 30 can be changed. A pulley 31 and a relief fitting 32 that surrounds the upper side of the pulley 31 are fixed to one side surface of the cylindrical body 35. It has been. The length of the support column is, for example, 2 m, and by making it possible to attach the cylindrical body 35 at an arbitrary height position, the tension height of the master rope can be freely adjusted. The metallic cylindrical body 35 is formed so that the support column 30 passes through the hollow portion, and through holes 36 are provided at the same height position on the two opposite side surfaces. A plurality of through holes 38 are formed at equal intervals (for example, at an interval of 75 mm) on the two opposing side surfaces of the support column 30. Preferably, the through holes 36 of the cylindrical body 35 are formed on the through holes 38 of the support column 30. According to the interval, it is provided at two upper and lower positions (for example, an interval of 150 mm). Then, the fixing position of the pulley 31 and the escape preventing metal fitting 32 is determined, the positions of the through hole 36 of the cylindrical body 35 and the through hole 38 of the column 30 are aligned, and the fixing pin 39 is passed through the through holes 36 and 38. The cylindrical body 35 can be fixed to the support column 30.

  FIGS. 10A and 10B are views showing the support 30 of the second configuration example in which two support pillars are integrated. FIG. 10A is a top view and FIG. 10B is a side view. The cylindrical body 35 has a hollow portion through which the cross-sections of the two columns pass, and the front and rear pulleys 31 and the escape prevention metal fittings 32 are fixed to one side surface of the cylindrical body 35, and are further different by 90 degrees. On the adjacent side surface, the left-right direction pulley 31 and the escape prevention fitting 32 are attached at a height position different from the height of the front-rear direction pulley 31 and the escape prevention fitting 32. The two struts have the same length, for example, 2 m. Similarly to the configuration of FIG. 9, a plurality of through holes 38 are formed at equal intervals on two opposite side surfaces of the support column 30, and the positions of the through holes 36 of the cylindrical body 35 and the through holes 38 of the support column 30 are determined. In addition, the cylindrical body 35 can be fixed to the support column 30 by passing the fixing pin 39 through the through holes 36 and 38.

  Also in the support 30 of the second configuration example shown in FIGS. 9 and 10, the auxiliary rope hooks shown in FIGS. 7 and 8 are provided, although not shown. In the column 30 of the second configuration example, a plurality of auxiliary rope hooks at predetermined intervals at a position outside the range in which the cylindrical body 35 is movable, that is, a position lower than the lowest limit position of the through hole 38 of the column 30. Is placed.

  The procedure for passing the master rope in the front-rear direction of the loading platform 3 is as follows. A support column 30 erected on the mounting member 20 attached to the left or right tilt plate 4 in front of the loading platform, and a support column 30 erected on the mounting member 20 mounted on the tilt plate 4 on the same side behind the loading platform. A master rope is passed between. One end of the master rope is passed over the pulley 31 of the support column 30 on the front side of the loading platform, and is fixed to the torii portion 6 on the front side of the loading platform with a predetermined mounting bracket (hook). The other end of the master rope is passed over the pulley 31 of the column 30 on the rear side of the loading platform. Then, a tension meter and a belt loader (lashing belt) are attached in parallel to a mounting bracket (hook) attached to the end of the master rope. One end of the tensiometer is attached to the mounting bracket at the end of the master rope, and the other end of the tensiometer is attached with a belt with a predetermined bracket, and the belt with the bracket is pulled with a predetermined tension in the vehicle. It is attached to a hook provided near the back of the cargo bed. A truck is provided with hooks at a plurality of locations.

  The tension of the parent rope is confirmed with a tensiometer, and the parent rope is stretched with a stronger tension of about 200 kg, for example. When the master rope is stretched with such a strong tension, even when a load of 85 kg is applied to the master rope of 10 m in length, the master rope will be bent about 30 cm, The tension is sufficient to ensure the safety of workers.

  While maintaining a predetermined tension with the tensiometer, the belt extending from the tensiometer is attached to the hook of the lorry, and the belt loader is also attached to the hook of the lorry while maintaining the tension.

  Then, after confirming that the master rope is stretched with a predetermined tension with a tension meter, an operation of further tightening the belt compactor is performed. As a result, stronger tension is applied to the master rope, and the tensiometer is loosened, and the tension gauge can be removed from the master rope and the vehicle hook. Thus, even after the tension meter is removed, a tension stronger than the tension confirmed by the tension meter can be applied to the parent rope, and the necessary tension can be maintained. By making the tensiometer removable, the tensiometer can be used for stretching work of another master rope. Since the tensiometer is a relatively expensive device, it can be shared by different master ropes.

  Further, when the master rope is hung in the left-right direction of the vehicle, the operation is substantially the same as described above. That is, a support column 30 erected on the attachment member 20 attached to the left side tilt plate 4 behind the loading platform and a support column 30 erected on the attachment member 20 attached to the right side elevation plate 4 behind the loading platform. The master rope is passed over, and one end of the master rope is passed over the pulley 31 of the column 30 on the left and right sides of the cargo bed, and is attached to a hook provided near the back of the cargo bed, and the other end The part is passed over the pulley 31 of the support column 30 on the left and right other side of the loading platform. In the same manner as described above, at the other end of the master rope, a tension meter and a belt crusher are attached in parallel to a mounting bracket (hook) attached to the end of the master rope. One end of the tension meter is attached to the mounting bracket at the end of the master rope, and the other end of the tension meter is attached with a belt with a predetermined bracket, and the belt with the bracket is pulled with a predetermined tension. It is attached to a hook provided near the back side of the cargo bed of the automobile.

  Then, after confirming that the master rope is stretched with a predetermined tension with a tension meter, the belt tensioner is further tightened, and then the tension meter is removed.

  The present invention is not limited to the above-described embodiment, and there are design changes within a range that does not depart from the gist including various modifications and corrections that can be conceived by those having ordinary knowledge in the field of the present invention. Of course, it is included in the present invention.

2: car body front part, 3: cargo bed, 4: tilt board, 5 master rope, 6: torii part, 7: guard plate, 10: master rope tensioning device, 20: mounting member, 21: first member, 22 : Second member, 22a: box, 30: support, 31: pulley, 32: escape prevention metal fitting, 33: hook for auxiliary rope, 40: tension meter, 50: belt compaction machine

Claims (7)

In the master rope tensioning device for extending the master rope to which the safety belt of the worker working on the carrier of the truck is connected,
A mounting member that is disposed on the front and rear or on the left and right of the cargo bed, and is detachably attached to the side wall plate of the cargo bed,
It is provided with struts erected on each mounting member,
The mounting member includes a first member having a surface facing the outer surface of the side wall plate of the cargo bed, and a second member having a surface facing the inner side surface of the side wall plate of the cargo bed, and the thickness of the side wall plate. Accordingly, by engaging racks attached to the first member and the second member, the distance between the first member and the second member can be adjusted, and the first member and the second member can be adjusted. Two members are connected, and a surface of the second member facing the inner side surface of the side wall plate of the loading platform is fixed and attached to a box having an upper opening so as to accommodate the support column. A plurality of bolts that are vertically inserted into and supported by the box along a surface facing the inner surface of the side wall plate of the loading platform in the second member, and that are arranged in the vertical direction on each of the left and right sides of the box in the vertical direction. By the box The surface facing the inner surface of the second cargo bed side wall plates in member is pressed together, Shintsuna stretching device according to claim Rukoto is fixed to the side wall plate of the loading platform. In claim 1,
The strut supports a main strut that supports a main rope stretched in the front-rear direction of the truck, and a main strut that is different in length from the first strut and is stretched in the left-right direction of the truck. A parent rope tensioning device, wherein the second strut is integrally formed in parallel. In claim 1,
The support column includes a frame body having a hollow portion through which the support column passes. The frame body is fixed to the support column with a variable height, and is stretched by a master rope support device attached to the frame body. A parent rope tensioning device characterized by supporting the parent rope. In claim 3,
The support column is integrated in parallel with a first support column supporting a main rope stretched in the front-rear direction of the lorry and a second support column supporting a master rope extended in the left-right direction of the lorry. The frame is fixed to the integrated first support column and the second support column through the integrated first support column and the second support column in a variable height. A parent rope tensioning device. In any one of Claims 1 thru | or 4,
A parent rope tensioning device, wherein a hook for fastening an auxiliary rope stretched between the columns is provided on a side surface of the column. In any one of Claims 1 thru | or 5, Furthermore,
Equipped with a belt-shaped packing machine to maintain the tension of the master rope stretched between the upper ends of each strut,
One end side of the master rope passes through the upper end portion of one strut and is fixed at a predetermined position of the lorry, and the other end side of the master rope passes through the upper end portion of the other strut and one end of the cargo tightening machine. A main rope tensioning apparatus, wherein the other end side of the cargo tightening machine is fixedly attached to a predetermined position of the truck. In the parent rope tensioning method using the parent rope tensioning device according to claim 6,
A tension meter for measuring the tension of the master rope is attached to the other end side of the master rope in parallel with the loader,
Perform the tightening operation of the loader to maintain the tension measured with the tension meter,
A parent rope tensioning method, wherein a tension meter is removed after a tightening operation of the cargo tightener.

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