Fiber rope prestretching device

Abstract

The utility model provides a fiber rope prestretching device which comprises a fixing support with a hollow upper end face, a first fixing table and a second fixing table, the first fixing table and the second fixing table are arranged on the two sides of the upper end face of the fixing support, and a first limiting column and a second limiting column are symmetrically installed on the two sides of the first fixing table. The head end of a rope penetrates through the first limiting column, the tail end of the rope penetrates through the second limiting column, a first locking mechanism used for locking the head end of the rope is installed on the first fixing table, and a second locking mechanism used for locking the tail end of the rope is further installed on the first fixing table. The pre-stretching device is simple in operation, can quickly and accurately carry out pre-stretching operation, effectively reduces the initial elongation of the rope, improves the length positioning capability of the rope, and improves the working efficiency of the rope. And the accuracy and the reliability of the rope in the use process are enhanced.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical tooling and fixture technology, and in particular relates to a fiber rope pre-tensioning device. Background Technology

[0002] Newly manufactured braided or twisted fiber ropes, due to their relatively loose dense structure when they leave the factory, will undergo structural elongation after being loaded with a certain load. Moreover, this structural elongation is permanent and irreversible.

[0003] Elongation at break is the most important performance indicator for rope products, second only to breaking strength and linear density. In the industry, these products are generally pre-stretched before use to reduce or eliminate structural elongation, thereby improving the length positioning and service life of the fiber braided rope.

[0004] For rope products that require high dimensional stability and strength, such as traction ropes for lifting mechanisms, hoisting ropes, safety ropes, sailboat ropes, and mooring lines for ships, it is necessary to eliminate structural elongation of the ropes during the production process.

[0005] Therefore, there is a need for a device for pre-stretching fiber ropes. Utility Model Content

[0006] The main purpose of this utility model is to provide a fiber rope pre-stretching device to address the shortcomings of the existing technology.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] A fiber rope pre-tensioning device includes a fixed bracket with a hollow upper surface and a first fixed platform and a second fixed platform disposed on both sides of the upper surface of the fixed bracket. A first limiting post and a second limiting post are symmetrically installed on both sides of the first fixed platform. The rope head end passes through the first limiting post, and the rope tail end passes through the second limiting post. A first locking mechanism for locking the rope head end is installed on the first fixed platform, and a second locking mechanism for locking the rope tail end is also installed on the first fixed platform. A tensioning unit for winding the rope portion located between the rope head end and the rope tail end is provided on the second fixed platform.

[0009] As a preferred embodiment of the fiber rope pre-tensioning device of this utility model, the first locking mechanism includes a first pull gate, a first shaft connected to the first pull gate, and a first tension plate connected to the end of the first shaft. A fixing plate mounted on the first fixing platform is attached to the back of the first tension plate. The first limiting post and the second limiting post are located on the top two sides of the fixing plate and are symmetrically arranged. A first groove is provided on the back of the fixing plate on the side of the first limiting post. The rope head extends toward the first fixing platform and bends into the first groove, and the first tension plate abuts against the extension of the rope head.

[0010] As a preferred embodiment of the fiber rope pre-tensioning device of this utility model, the second locking mechanism includes a second pull gate, a second shaft connected to the second pull gate, and a second tension plate connected to the end of the second shaft. The second tension plate is fitted against the back of the fixing plate. The fixing plate has a second groove on the back of the side of the second limiting post. The end of the rope extends toward the second fixing platform and bends into the second groove, and the second tension plate abuts against the extension of the end of the rope.

[0011] As a preferred embodiment of the fiber rope pre-stretching device of this utility model, the stretching unit includes a motor and a stretching arm connected to the motor. A fixed pulley is installed on the top of the stretching arm. The head end of the rope is fixed by the first locking mechanism. The tail end of the rope sequentially passes through the first limiting post, wraps around the fixed pulley, passes through the second limiting post, and is fixed by the second locking mechanism at the tail end of the rope. A guide rail for the stretching arm to move is installed on the surface of the second fixed platform.

[0012] As a preferred embodiment of the fiber rope pre-stretching device of this utility model, a plurality of fixed pulleys are equidistantly arranged on the top of the fixed plate, and the stretching unit further includes a plurality of motors and stretching arms connected to the corresponding motors. The top of each stretching arm is equipped with a fixed pulley. The fixed pulleys on the top of the fixed plate and the fixed pulleys on the stretching unit are arranged to form a fixed pulley group. The head end of the rope is fixed by the first locking mechanism, and the tail end of the rope sequentially passes through the first limiting post, wraps around the fixed pulley group, passes through the second limiting post, and is fixed by the second locking mechanism. The surface of the second fixed platform is also equipped with a guide rail for the corresponding stretching arm to move.

[0013] As a preferred embodiment of the fiber rope pre-tensioning device of this utility model, the top of the fixing plate is provided with four fixed pulleys, and the tensioning unit includes five fixed pulleys.

[0014] As a preferred embodiment of the fiber rope pre-stretching device of this utility model, a control unit for controlling the operation of the stretching unit is also installed at the bottom of the second fixed platform.

[0015] As a preferred embodiment of the fiber rope pre-tensioning device of this utility model, each of the four bottom corners of the fixed bracket is equipped with a moving mechanism to facilitate moving the fixed bracket. The moving mechanism includes a connecting plate that fits against the bottom of the fixed bracket. A moving column is installed at the bottom of the connecting plate. The moving column includes a column top and a column bottom and a rotating shaft connecting the column top and the column bottom. The column top is fixedly connected to the connecting plate, and the column bottom is fixedly connected to a movable pulley.

[0016] As a preferred embodiment of the fiber rope pre-stretching device of this utility model, a positioning disk that can rotate along the rotating axis is installed between the top of the column and the bottom of the column. The positioning disk is threadedly connected to the rotating axis. The outer circumference of the positioning disk is circumferentially arrayed with protrusions, and two adjacent protrusions can abut against the outer surface of the movable pulley.

[0017] As a preferred embodiment of the fiber rope pre-tensioning device of this utility model, a groove is formed between two adjacent protrusions, and the distance between the grooves is not greater than the thickness of the movable pulley.

[0018] Compared with the prior art, the present invention will have at least the following beneficial effects:

[0019] The pre-tensioning device of this invention is simple to operate and can perform pre-tensioning operations quickly and accurately, effectively reducing the initial elongation of the rope, improving the rope's length positioning ability, and enhancing the accuracy and reliability of the rope during use.

[0020] The first locking mechanism and the second locking mechanism in the pre-tensioning device of this utility model can fix the head end and the tail end of the rope respectively, thereby improving the positional stability of the rope when it is stretched.

[0021] The pre-tensioning device of this utility model can divide the rope into multiple ropes by setting up a fixed pulley group composed of several fixed pulleys, and can perform pre-tensioning treatment simultaneously.

[0022] The moving mechanism in the pre-stretching device of this invention facilitates the relocation of the pre-stretching device and also allows for its fixed position.

[0023] The pre-tensioning device of this utility model can pre-tension different ropes, including but not limited to lifting mechanism traction ropes, hoisting ropes, safety ropes, sailboat ropes, and ship mooring lines, and has a wide range of applications. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are merely exemplary embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort, wherein:

[0025] Figure 1 This is a schematic diagram of the fiber rope pre-stretching device of this utility model;

[0026] Figure 2 This is a schematic diagram of the fiber rope pre-stretching device of this utility model from another perspective.

[0027] Figure 3 for Figure 2 Enlarged schematic diagram at point I;

[0028] Figure 4 This is a partial structural diagram of the fixing plate in this utility model;

[0029] Figure 5 This is a schematic diagram of the first locking mechanism in this utility model;

[0030] Figure 6 This is a schematic diagram of the second locking mechanism in this utility model;

[0031] Figure 7 This is a schematic diagram of the moving mechanism in this utility model.

[0032] The reference numerals in the figures include:

[0033] 1. Fixed bracket; 2. First fixed platform; 3. Second fixed platform; 4. Fixed plate; 5. First limiting post; 6. Second limiting post; 7. Rope; 8. Rope head end; 9. Rope tail end; 10. First locking mechanism; 11. Second locking mechanism; 12. Motor; 13. Tensioning arm; 14. Fixed pulley; 15. First pull-out brake; 16. First shaft; 17. First tension plate; 18. Second pull-out brake; 19. Second shaft; 20. Second tension plate; 21. First slot; 22. Second slot; 23. Guide rail; 24. Control unit; 25. Moving mechanism; 26. Connecting plate; 27. Column top; 28. Column bottom; 29. ​​Rotating shaft; 30. Moving pulley; 31. Positioning plate; 32. Protrusion; 33. Groove. Detailed Implementation

[0034] The technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are merely exemplary embodiments of this utility model, and not the only embodiments.

[0035] like Figures 1 to 7 As shown, the fiber rope pre-stretching device includes a fixed bracket 1 with a hollow upper surface and a first fixed platform 2 and a second fixed platform 3 disposed on both sides of the upper surface of the fixed bracket 1. A first limiting post 5 and a second limiting post 6 are symmetrically installed on both sides of the first fixed platform 2. The rope head end 8 passes through the first limiting post 5, and the rope tail end 9 passes through the second limiting post 6. A first locking mechanism 10 for locking the rope head end 8 and a second locking mechanism 11 for locking the rope tail end 9 are installed on the first fixed platform 2. The first locking mechanism 10 can fix the portion of the rope head end 8 protruding from the first limiting post 5, thus fixing the rope head end 8. Similarly, the second locking mechanism 11 can fix the portion of the rope tail end 9 protruding from the second limiting post 6, thus fixing the rope tail end 9. The cooperation of the first locking mechanism 10 and the second locking mechanism 11 can fix the rope 7. The second fixed platform 3 is provided with a mechanism for winding between the rope head end 8 and the rope tail end 9. The tensioning unit of the rope 7 includes a motor 12 and a tensioning arm 13 connected to the motor 12. A fixed pulley 14 is installed on the top of the tensioning arm 13. The rope head 8 of the rope 7 is fixed by a first locking mechanism 10, and the rope tail 9 sequentially passes through a first limiting post 5, wraps around the fixed pulley 14, passes through a second limiting post 6, and is fixed by a second locking mechanism 11. A guide rail 23 is installed on the surface of the second fixed platform 3, which allows the tensioning arm 13 to move. The tensioning unit can pre-tension the rope 7. Specifically, after the rope head 8 and the rope tail 9 are fixed by the first locking mechanism 10 and the second locking mechanism 11, and the main body of the rope 7 is wrapped around the fixed pulley 14, the switch of the device in this embodiment is turned on. The tensioning arm 13 applies a pre-tensioning force to the rope 7 under the action of the motor 12 and moves along the guide rail 23, thereby stretching the rope 7. The moving distance and pre-tensioning force value of the tensioning arm 13 can be changed by adjusting the speed and torque of the motor 12.

[0036] The first locking mechanism 10 includes a first pull gate 15, a first shaft 16 connected to the first pull gate 15, and a first tension plate 17 connected to the end of the first shaft 16. A fixing plate 4 mounted on the first fixing platform 2 is attached to the back of the first tension plate 17. The first limiting post 5 and the second limiting post 6 are located on the top sides of the fixing plate 4 and are symmetrically arranged. A first groove 21 is provided on the back of the fixing plate 4 on one side of the first limiting post 5. The rope end 8 extends towards the first fixing platform 2 and bends into the first groove 21, and is abutted against the extension of the rope end 8 by the first tension plate 17. Specifically, when it is necessary to... To fix the rope end 8, the rope end 8 is bent and placed into the first slot 21 by hand. The first pull gate 15 is then lowered. Under downward pressure, the first shaft 16 moves along the direction of the first tension plate 17 and pushes the first tension plate 17 towards the fixing plate 4 so that the first tension plate 17 abuts against the extension of the rope end 8, i.e., the bent part, thereby fixing the rope end 8. When the pre-tensioning operation of the rope 7 is finished, the first pull gate 15 is lifted, the first shaft 16 moves back and drives the first tension plate 17 back to its original position. Then the rope end 8 is removed by hand for subsequent operations.

[0037] The second locking mechanism 11 includes a second pull gate 18, a second shaft 19 connected to the second pull gate 18, and a second tension plate 20 connected to the end of the second shaft 19. The second tension plate 20 is fitted against the back of the fixing plate 4. The fixing plate 4 has a second groove 22 on the back of the side of the second limiting post 6. The rope tail end 9 extends towards the second fixing platform 3 and bends into the second groove 22, and is abutted against the extension of the rope tail end 9 by the second tension plate 20. Specifically, when it is necessary to fix the rope tail end 9, the rope tail end 9 is bent manually. Place the second lever 18 into the second slot 22, lower the second lever 18, and under downward pressure, the second shaft 19 moves along the direction of the second tension plate 20 and pushes the second tension plate 20 towards the fixed plate 4 so that the second tension plate 20 abuts against the extension of the rope tail end 9, i.e., the bent part, thereby fixing the rope tail end 9. When the rope 7 pre-tensioning operation is finished, lift the second lever 18, and the second shaft 19 moves back and drives the second tension plate 20 back to its original position. Then, the rope tail end 9 can be taken out manually for subsequent operations.

[0038] Furthermore, to ensure the fixing effect and consistency of the rope head end 8 and the rope tail end 9, the heights of the first tension plate 17 and the second tension plate 20 are the same as the height of the fixing plate 4.

[0039] Furthermore, the top of the fixed plate 4 is provided with several fixed pulleys 14 at equal intervals. The tensioning unit also includes several motors 12 and tensioning arms 13 connected to the corresponding motors 12. The top of each tensioning arm 13 is equipped with a fixed pulley 14. The fixed pulleys 14 on the top of the fixed plate 4 and the fixed pulleys 14 on the tensioning unit are arranged to form a fixed pulley 14 group. The rope end 8 is fixed by the first locking mechanism 10. The rope end 9 passes through the first limiting post 5, winds the fixed pulley 14 group, passes through the second limiting post 6, and is fixed by the second locking mechanism 11. The surface of the second fixed platform 3 is also equipped with a guide rail 23 for the corresponding tensioning arm 13 to move. By setting the fixed pulley 14 group, a rope 7 of a certain length can be wound into multiple ropes 7 and pre-stretched simultaneously. Furthermore, the top of the fixed plate 4 is provided with four fixed pulleys 14, and the tensioning unit includes five fixed pulleys 14. In this way, a six-meter-long rope 7 can be wound into ten ropes 7 and pre-stretched simultaneously.

[0040] Furthermore, a control unit 24 for controlling the operation of the stretching unit is also installed at the bottom of the second fixed platform 3. The control unit 24 is responsible for receiving the operation instructions and feedback signals of the device in this embodiment. Specifically, it includes a microprocessor, a user interface and a corresponding software algorithm. The user can set the pre-stretch strength and length parameters through the user interface. In this embodiment, the pre-stretch length is 0-50mm, the pre-stretch time is 0-600s, and the pre-stretch strength is 0-500kgf.

[0041] Furthermore, to facilitate rapid repositioning of the device in this embodiment, a moving mechanism 25 is installed at each of the four bottom corners of the fixed bracket 1 to facilitate moving the fixed bracket 1. The moving mechanism 25 includes a connecting plate 26 that fits against the bottom of the fixed bracket 1. A moving column is installed at the bottom of the connecting plate 26. The moving column includes a column top 27 and a column bottom 28, and a rotating shaft 29 connecting the column top 27 and the column bottom 28. The column top 27 is fixedly connected to the connecting plate 26, and the column bottom 28 is fixedly connected to the movable pulley 30. The addition of the movable pulley 30 facilitates the repositioning of the device in this embodiment.

[0042] Furthermore, to facilitate the positioning of the device in this embodiment, a positioning disk 31 that can rotate along the rotation axis 29 is installed between the top 27 and the bottom 28 of the column. The positioning disk 31 is threadedly connected to the rotation axis 29. The outer circumference of the positioning disk 31 is circumferentially arrayed with protrusions 32. Two adjacent protrusions 32 can abut against the outer surface of the movable pulley 30. Specifically, after the position of the device in this embodiment is determined, the positioning disk 31 is manually rotated so that the positioning disk 31 rotates downward along the rotation axis 29. When two adjacent protrusions 32 on the positioning disk 31 abut against the outer surface of the movable pulley 30, the position of the movable pulley 30 on the ground is fixed. At this time, the overall fixing of the device in this embodiment is completed. When it is necessary to move the device in this embodiment again, the positioning disk 31 is manually rotated upward so that the positioning disk 31 rotates upward along the rotation axis 29. After the two adjacent protrusions 32 on the positioning disk 31 separate from the outer surface of the movable pulley 30, the device in this embodiment can be pushed.

[0043] Furthermore, a groove 33 is formed between two adjacent protrusions 32. To ensure that the two adjacent protrusions 32 on the positioning disk 31 can smoothly abut against the outer surface of the movable pulley 30, the spacing of the grooves 33 should not be greater than the thickness of the movable pulley 30. If the spacing of the grooves 33 is greater than the thickness of the movable pulley 30, the adjacent protrusions 32 cannot abut against the outer surface of the movable pulley 30, and thus the movable pulley 30 cannot be fixed, that is, the device of this embodiment cannot be fixed in position. Therefore, the spacing of the grooves 33 should be less than or equal to the thickness of the movable pulley 30.

[0044] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A fiber rope pre-tensioning device, comprising a fixed bracket (1) with a hollow upper surface and a first fixed platform (2) and a second fixed platform (3) disposed on both sides of the upper surface of the fixed bracket (1), characterized in that, A first limiting post (5) and a second limiting post (6) are symmetrically installed on both sides of the first fixed platform (2). The rope head end (8) passes through the first limiting post (5), and the rope tail end (9) passes through the second limiting post (6). A first locking mechanism (10) for locking the rope head end (8) is installed on the first fixed platform (2). A second locking mechanism (11) for locking the rope tail end (9) is also installed on the first fixed platform (2). A tensioning unit for winding the rope (7) portion located between the rope head end (8) and the rope tail end (9) is provided on the second fixed platform (3).

2. The fiber rope pre-tensioning device according to claim 1, characterized in that, The first locking mechanism (10) includes a first pull gate (15), a first shaft (16) connected to the first pull gate (15), and a first tension plate (17) connected to the end of the first shaft (16). A fixing plate (4) mounted on the first fixing platform (2) is attached to the back of the first tension plate (17). The first limiting post (5) and the second limiting post (6) are located on the top two sides of the fixing plate (4) and are symmetrically arranged. A first slot (21) is provided on the back of the fixing plate (4) on one side of the first limiting post (5). The rope end (8) extends toward the first fixing platform (2) and bends into the first slot (21) and is abutted against the extension of the rope end (8) by the first tension plate (17).

3. The fiber rope pre-tensioning device according to claim 2, characterized in that, The second locking mechanism (11) includes a second pull gate (18), a second shaft (19) connected to the second pull gate (18), and a second tension plate (20) connected to the end of the second shaft (19). The second tension plate (20) is fitted against the back of the fixing plate (4). The fixing plate (4) has a second slot (22) on the back of the side of the second limiting post (6). The rope tail end (9) extends toward the second fixing platform (3) and bends into the second slot (22), and the second tension plate (20) abuts against the extension of the rope tail end (9).

4. The fiber rope pre-tensioning device according to claim 3, characterized in that, The tensioning unit includes a motor (12) and a tensioning arm (13) connected to the motor (12). A fixed pulley (14) is installed on the top of the tensioning arm (13). The head end (8) of the rope is fixed by the first locking mechanism (10). The tail end (9) of the rope passes through the first limiting post (5), wraps around the fixed pulley (14), passes through the second limiting post (6) to the tail end (9) of the rope, and is fixed by the second locking mechanism (11). A guide rail (23) is installed on the surface of the second fixed platform (3) so that the tensioning arm (13) can move.

5. The fiber rope pre-tensioning device according to claim 4, characterized in that, The top of the fixed plate (4) is provided with a plurality of fixed pulleys (14) at equal intervals. The tensioning unit also includes a plurality of motors (12) and tensioning arms (13) connected to the corresponding motors (12). The top of each of the tensioning arms (13) is provided with a fixed pulley (14). The fixed pulleys (14) on the top of the fixed plate (4) and the fixed pulleys (14) on the tensioning unit are arranged to form a fixed pulley (14) group. The rope head end (8) is fixed by the first locking mechanism (10). The rope tail end (9) passes through the first limiting post (5), wraps around the fixed pulley (14) group, passes through the second limiting post (6) to the rope tail end (9) and is fixed by the second locking mechanism (11). The surface of the second fixed platform (3) is also provided with a guide rail (23) for the corresponding tensioning arm (13) to move.

6. The fiber rope pre-tensioning device according to claim 5, characterized in that, The top of the fixed plate (4) is provided with four fixed pulleys (14), and the tensioning unit includes five fixed pulleys (14).

7. The fiber rope pre-tensioning device according to claim 1, characterized in that, The bottom of the second fixed platform (3) is also equipped with a control unit (24) for controlling the operation of the stretching unit.

8. The fiber rope pre-tensioning device according to claim 1, characterized in that, The fixed bracket (1) is equipped with a moving mechanism (25) at each of its four bottom corners to facilitate moving the fixed bracket (1). The moving mechanism (25) includes a connecting plate (26) that fits against the bottom of the fixed bracket (1). A moving column is installed at the bottom of the connecting plate (26). The moving column includes a column top (27) and a column bottom (28) and a rotating shaft (29) that connects the column top (27) and the column bottom (28). The column top (27) is fixedly connected to the connecting plate (26), and the column bottom (28) is fixedly connected to the movable pulley (30).

9. The fiber rope pre-tensioning device according to claim 8, characterized in that, A positioning disk (31) that can rotate along the rotating axis (29) is installed between the top (27) of the column and the bottom (28) of the column. The positioning disk (31) is threadedly connected to the rotating axis (29). The outer circumference of the positioning disk (31) is distributed with protrusions (32), and two adjacent protrusions (32) can abut against the outer surface of the movable pulley (30).

10. The fiber rope pre-tensioning device according to claim 9, characterized in that, A groove (33) is formed between two adjacent protrusions (32), and the spacing between the grooves (33) is not greater than the thickness of the movable pulley (30).

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