Single-end tensioner and guardrail thereof

Abstract

The utility model relates to the technical field of steel wire rope fastening installation, in particular to a single-end tensioner and a guardrail thereof, and is characterized in that the single-end tensioner comprises a screw rod, a sleeve and a sleeve cap, the sleeve and the sleeve cap are sequentially sleeved on the screw rod, one end of the sleeve is provided with an expansion section, the sleeve cap is used for driving the expansion section to expand, and the screw rod comprises a first operation section and a thread section. The screw is in threaded connection with the sleeve cap through the threaded section, and the first operation section is used for operating and driving the screw to rotate. According to the single-end tensioner, most of the structure of the single-end tensioner can be conveniently hidden in the stand column, and the cable can be tensioned from the single end of the stand column, so that continuous multi-section cable installation can be realized between a plurality of adjacent stand columns in sequence, and the single-end tensioner can be repeatedly used.

Description

Technical Field

[0001] The utility model relates to the technical field of steel wire rope fastening and installation, in particular to a single-end tensioner and a guardrail thereof. Background Art

[0002] At present, various metal guard nets, retaining nets, etc. formed by connecting steel wire ropes between the columns on both sides are widely used because of their easy installation and good impact resistance to play a corresponding protective role. For such metal guard nets and retaining nets, during installation and construction, corresponding connecting tensioners are required to connect and tighten the steel wire ropes and apply a certain pre-tensioning force. However, the existing concealed connecting tensioners require two holes on the opposite sides of the column during installation, so it is impossible to continuously install multiple sections of steel wire ropes. During installation, only the connecting tensioners at the single-end holes of the column are used. Although continuous multi-section installation of steel wire ropes can be achieved, they are almost not concealed, and the overall appearance is not as good as the connecting tensioners with hidden functions. In view of this, this issue has been studied in depth, resulting in the present case. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a single-ended tensioner and its guardrail which are convenient for hiding most of the structure of the single-ended tensioner in a column and can realize tensioning of cables from a single end of the column, so that continuous installation of multiple sections of cables can be realized between multiple adjacent columns in sequence, and can be reused.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is as follows: a single-end tensioner, including a screw, a sleeve and a cap, the sleeve and the cap are sequentially sleeved on the screw, one end of the sleeve is provided with an expansion section, the cap is used to drive the expansion section to expand, the screw includes a first operating section and a threaded section, the screw is threadedly connected to the cap through the threaded section, and the first operating section is used to operate and drive the screw to rotate.

[0005] Furthermore, the screw rod is provided with threading holes passing through both ends thereof, the sleeve cap is provided with threaded holes passing through both ends thereof, the outer surface of the threaded section is provided with external threads, and the outer surface of the first operating section is provided with two symmetrical first plane sections.

[0006] Furthermore, it also includes a crimping sleeve, which is arranged on one side of the screw rod close to the threaded section, and a crimping hole is arranged in the crimping sleeve, and the outer diameter of the crimping sleeve is larger than the inner diameter of the threading hole.

[0007] Furthermore, it also includes a gasket, in which a through hole is provided, and the gasket is arranged between the crimping sleeve and the screw rod.

[0008] Furthermore, a cavity is provided in the sleeve which passes through both ends thereof, a plurality of strip grooves are provided on the outer surface of the expansion section of the sleeve which are arranged parallel to the axial direction of the sleeve and a plurality of arc-shaped expansion spring plates are formed on the expansion section, one end of the strip groove passes through one end of the sleeve, a conical surface which expands and cooperates with the expansion section is provided on the outer surface of the cap, and the inner diameter of the cavity is larger than the minimum outer diameter of the cap and smaller than the maximum outer diameter of the cap.

[0009] Furthermore, a notch communicating with the other end of the strip-shaped slot is provided on the outer surface of the sleeve, the width of the notch is greater than the width of the strip-shaped slot, and the number of the notches is consistent with and corresponds to the number of the strip-shaped slots.

[0010] Furthermore, the number of the strip-shaped notches is 2-6 and they are evenly arranged along the circumferential direction of the sleeve.

[0011] Furthermore, the length of the expansion section is greater than half the length of the sleeve.

[0012] Furthermore, a second operating section is provided at the other end of the sleeve, and two symmetrical second plane sections are provided on the outer surface of the second operating section.

[0013] A guardrail comprises a cable, at least two posts and at least one single-ended tensioner of any one of the above items, at least one mounting hole is provided on both side end faces of the post, at least one end of the cable is connected to the corresponding single-ended tensioner, the single-ended tensioner passes through the mounting hole of the post on the corresponding side and is installed in the post to tighten the cable.

[0014] From the above description, it can be seen that the single-end tensioner and guardrail provided by the utility model have the following features:

[0015] Beneficial effects:

[0016] First, when in use, the single-ended tensioner can be inserted from the mounting hole of the single end of the column, the first operating section of the screw and the second operating section of the sleeve are both left outside the column, while the threaded section of the screw, the expansion section of the sleeve, the sleeve cap, the gasket and the crimping sleeve are all inside the column. In this way, most of the structure of the single-ended tensioner is conveniently hidden inside the column, so as to ensure the overall aesthetics of the single-ended tensioner when in use, and the external dimensions of the single-ended tensioner can be made smaller;

[0017] Second, with the use of the crimping sleeve, it is convenient to crimp the cable, so as to achieve a fixed connection with the cable. Therefore, when the screw is rotated and the screw moves relative to the sleeve cap toward the side of the crimping sleeve, the crimping sleeve can be pushed to move together, thereby playing a corresponding tightening effect on the cable, and the cable can be tightened from a single end of the column without affecting the installation of the mounting hole on the other side of the column, so that the installation of multiple sections of continuous cables can be achieved between multiple adjacent columns in turn, and the installation and disassembly are simple and can be reused;

[0018] Third, during the cable tensioning process, the cap can also gradually move along the screw rod toward the side close to the second operating section of the sleeve during the tensioning process, and gradually expand the expansion section of the sleeve through the change in the taper of the conical surface of the cap, so that the expansion section of the sleeve is stably stuck in the mounting hole of the column, thereby realizing the overall fixation of the single-end tensioner on the column. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The utility model is a schematic diagram of the three-dimensional structure of a single-end tensioner.

[0020] Figure 2 The utility model is a schematic diagram of the internal structure of a single-end tensioner.

[0021] Figure 3 The utility model is a structural schematic diagram of a guardrail.

[0022] Figure 4 It is a schematic diagram of the three-dimensional structure of the column.

[0023] Figure 5 The utility model is a structural schematic diagram of another embodiment of a guardrail.

[0024] In the figure: 1-screw; 11-first operating section; 111-first plane section; 12-threaded section; 121-external thread; 13-threading hole; 2-sleeve; 21-expansion section; 22-cavity; 23-strip notch; 24-arc-shaped expansion spring; 25-notch; 26-second operating section; 261-second plane section; 3-cap; 31-threaded hole; 32-conical surface; 4-crimping sleeve; 41-crimping hole; 5-gasket; 51-through hole; 6-cable; 7-column; 71-mounting hole; 8-cable holder. DETAILED DESCRIPTION

[0025] The present invention is further described below through specific implementation methods.

[0026] like Figures 1 to 5 As shown, a single-end tensioner described in the utility model comprises a screw rod 1, a sleeve 2, a sleeve cap 3, a crimping sleeve 4 and a gasket 5.

[0027] The sleeve 2 and the sleeve cap 3 are sequentially sleeved on the screw 1, one end of the sleeve 2 is provided with an expansion section 21, the sleeve cap 3 is used to drive the expansion section 21 to expand, and accordingly, the sleeve 2 is provided with a cavity 22 running through both ends thereof, the outer surface of the expansion section 21 of the sleeve 2 is provided with a plurality of strip notches 23 arranged parallel to the axial direction of the sleeve 2, and a plurality of arc-shaped expansion spring pieces 24 are formed on the expansion section 21, one end of the strip notch 23 runs through one end of the sleeve 2, and the outer surface of the sleeve cap 3 is provided with a conical surface 32 that expands with the expansion section 21, the inner diameter of the cavity 22 is larger than the minimum outer diameter of the sleeve cap 3 and smaller than the maximum outer diameter of the sleeve cap 3, and the plurality of strip notches 23 are arranged so that the sleeve The expansion section 21 of the tube 2 is formed with a plurality of arc-shaped expansion spring pieces 24. In this way, during the tensioning process of the cable 6, the cap 3 can also gradually move along the screw rod 1 toward one side close to the second operating section 26 of the sleeve 2 during the tensioning process, and gradually push the plurality of arc-shaped expansion spring pieces 24 outward through the change in the taper of the conical surface 32 of the cap 3, so as to realize the expansion of the expansion section 21 of the sleeve 2, and make the expansion section 21 of the sleeve 2 stably stuck in the mounting hole 71 of the column 7. Accordingly, the sleeve 2 and the cap 3 can be made of metal material, and the arc-shaped expansion spring piece 24 has a certain resilience. After the cap 3 is removed, the arc-shaped expansion spring piece 24 can rebound and reset, so as to facilitate reuse.

[0028] In addition, a notch 25 communicating with the other end of the strip slot 23 is provided on the outer surface of the sleeve 2, and the width of the notch 25 is greater than the width of the strip slot 23. The number of the notches 25 is consistent with the number of the strip slots 23 and corresponds one to one, thereby facilitating better pushing outward the plurality of arc-shaped expansion spring sheets 24 to further enhance the expansion effect of the expansion section 21. Preferably, the notch 25 is elliptical or circular.

[0029] Preferably, the number of the strip-shaped notches 23 is 2-6 and they are evenly arranged along the circumferential direction of the sleeve 2. Correspondingly, the number of the notches 25 is also 2-6.

[0030] In addition, a second operating section 26 is provided at the other end of the sleeve 2, and two symmetrical second planar cut surfaces 261 are provided on the outer surface of the second operating section 26. The two second planar cut surfaces 261 can be clamped with a clamping tool, such as a wrench, to keep the sleeve 2 fixed.

[0031] The screw 1 includes a first operating section 11 and a threaded section 12. Preferably, the length of the threaded section 12 is greater than that of the first operating section 11. In addition, the length of the screw 1 can be set to different lengths according to the size of the sleeve 2. The screw 1 is provided with threading holes 13 running through both ends thereof, and the cable 6 can pass through the threading holes 13. The screw 1 is threadedly connected to the sleeve cap 3 through the threaded section 12. Accordingly, the sleeve cap 3 is provided with threaded holes 31 running through both ends thereof. An external thread 121 is provided on the outer surface of the threaded section 12. The first operating section 11 is used to operate and drive the screw 1 to rotate. Accordingly, two symmetrical first plane cut surfaces 111 are provided on the outer surface of the first operating section 11. The two first plane cut surfaces 111 can be clamped in cooperation with a clamping tool to facilitate the rotation of the screw 1.

[0032] The crimping sleeve 4 is arranged on the side of the screw rod 1 close to the threaded section 12, and a crimping hole 41 is arranged in the crimping sleeve 4, so that one end of the cable 6 can be inserted into the crimping hole 41, and the crimping sleeve 4 can be conveniently crimped and fixed on the cable 6 by crimping the outer surface of the crimping sleeve 4. Preferably, the crimping sleeve 4 can be made of aluminum, steel or other metal materials. In addition, the outer diameter of the crimping sleeve 4 is larger than the inner diameter of the threading hole 13. When in use, the screw rod 1 can abut against and support the crimping sleeve 4. Therefore, when the screw rod 1 is rotated and the screw rod 1 is moved toward the side of the crimping sleeve 4 relative to the sleeve cap 3, the crimping sleeve 4 can be pushed to move together, thereby exerting a corresponding tightening effect on the cable 6. In addition, in other embodiments, when the crimping sleeve 4 is not used, the outer surface of the first operating section 11 of the screw rod 1 can also be crimped to fix the screw 1 and the cable 6.

[0033] The gasket 5 is provided with a through hole 51 therein, and the gasket 5 is provided between the crimping sleeve 4 and the screw rod 1. Preferably, the gasket 5 is a metal sheet, which can effectively reduce the friction between the crimping sleeve 4 and the screw rod 1 when the screw rod 1 is rotated.

[0034] A guardrail comprises a cable 6, at least two posts 7 and at least one single-ended tensioner as described in any one of the above items, at least one mounting hole 71 is provided on both side end faces of the post 7, at least one end of the cable 6 is connected to the corresponding single-ended tensioner, the single-ended tensioner passes through the mounting hole 71 of the post 7 on the corresponding side and is installed in the post 7 to tighten the cable 6.

[0035] Preferably, the cable 6 is a steel wire rope or a cable 6 made of other materials.

[0036] In this embodiment, there are two single-ended tensioners, and both ends of the cable 6 are respectively connected to the corresponding single-ended tensioners. In other embodiments, there may be one single-ended tensioner, and one end of the cable 6 is connected to the single-ended tensioner to adjust the tension of the cable 6 from one end thereof, while the other end of the cable 6 may be connected to a cable holder 8, which is only used to connect and fix the other end of the cable 6, and may adopt a structure in the prior art, so that the single-ended tensioner can be used in conjunction with different cable holders 8.

[0037] When in use, the single-ended tensioner can be inserted from the mounting hole 71 of the single end of the column 7, the first operating section 11 of the screw rod 1 and the second operating section 26 of the sleeve 2 are both left outside the column 7, while the threaded section 12 of the screw rod 1, the expansion section 21 of the sleeve 2, the cap 3, the gasket 5 and the crimping sleeve 4 are all inside the column 7. In this way, most of the structure of the single-ended tensioner is conveniently hidden inside the column 7 to ensure the overall aesthetics of the single-ended tensioner when in use, and the external dimensions of the single-ended tensioner can be made smaller. In addition, with the use of the crimping sleeve 4, it is convenient to crimp the cable 6, thereby achieving a fixed connection with the cable 6. Therefore, when the screw rod 1 is rotated and the screw rod 1 is moved relative to the cap 3 toward the crimping sleeve 4, the screw rod 1 can be pushed. The crimping sleeve 4 moves together, thereby having a corresponding tightening effect on the cable 6, and can tighten the cable 6 from a single end of the column 7 without affecting the installation of the mounting hole 71 on the other side of the column 7, so that the installation of multiple sections of continuous cable 6 can be achieved between multiple adjacent columns 7 in turn, and the installation and disassembly are simple and can be reused. During the tightening process of the cable 6, at the same time, the sleeve cap 3 can also be gradually moved along the screw rod 1 toward the side of the second operating section 26 of the sleeve 2 during the tightening process, and the expansion section 21 of the sleeve 2 is gradually expanded through the taper change of the conical surface 32 of the sleeve cap 3, and the expansion section 21 of the sleeve 2 is stably stuck in the mounting hole 71 of the column 7, thereby realizing the overall fixation of the single-end tensioner on the column 7.

[0038] The method of using the single-end tensioner and the guardrail described in the utility model is as follows:

[0039] First, screw the cap 3 onto the screw 1, and put the sleeve 2 on the screw 1, then insert the cable 6 into the threading hole 13 of the screw 1, and let the end of the cable 6 pass through the screw 1, then put the gasket 5 and the crimping sleeve 4 on the end of the cable 6 in turn, and leave about 1 cm of length at the end of the cable 6, and then use alligator pliers to press the crimping sleeve 4. When crimping, only the side of the crimping sleeve 4 away from the screw 1 needs to be crimped. The order from the end of the cable 6 to the inside is the crimping sleeve 4, the gasket 5 and the screw 1;

[0040] The single-end tensioner is placed into the inner cavity of the column 7 from the mounting hole 71 of the column 7, and then the screw 1 is manually tightened, and the expansion section 21 of the sleeve 2 is pre-expanded, and then a wrench is used to clamp the two second plane cut surfaces 261 of the sleeve 2 to keep the sleeve 2 fixed, and a corresponding clamping tool is used to clamp the two first plane cut surfaces 111 of the screw 1, and the screw 1 is rotated. Due to the friction resistance between the sleeve cap 3 and the expansion section 21 of the sleeve 2, the sleeve cap 3 will not rotate with the rotation of the screw 1, and the screw 1 is relative to the sleeve cap 3 toward the side of the crimping sleeve 4 When moving, the crimping sleeve 4 can be pushed to move together, thereby playing a corresponding tightening effect on the cable 6, and in the process of tightening the cable 6, at the same time, the sleeve cap 3 can also gradually move along the screw 1 to the side close to the second operating section 26 of the sleeve 2 during the tightening process, and gradually expand the expansion section 21 of the sleeve 2 through the taper change of the conical surface 32 of the sleeve cap 3, and make the expansion section 21 of the sleeve 2 stably stuck in the mounting hole 71 of the column 7, thereby realizing the overall fixation of the single-end tensioner on the column 7 and tightening the cable 6.

[0041] It should be understood that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made and that such a development effort may be complex and time-consuming, but will be a routine task of design, fabrication, and production for those of ordinary skill having the benefit of this disclosure without undue experimentation.

[0042] The above are only some specific implementation methods of the utility model, but the design concept of the utility model is not limited to this. Any non-substantial changes to the utility model using this concept shall be deemed as an infringement of the protection scope of the utility model.

Claims

1. A single-ended tensioner, characterized in that: It includes a screw rod, a sleeve and a cap, the sleeve and the cap are sequentially sleeved on the screw rod, one end of the sleeve is provided with an expansion section, the cap is used to drive the expansion section to expand, the screw rod includes a first operating section and a threaded section, the screw rod is threadedly connected to the cap through the threaded section, and the first operating section is used to operate and drive the screw rod to rotate.

2. A single-ended tensioner according to claim 1, characterized in that: The screw rod is provided with threading holes passing through both ends thereof, the sleeve cap is provided with threaded holes passing through both ends thereof, the outer surface of the threaded section is provided with external threads, and the outer surface of the first operating section is provided with two symmetrical first plane sections.

3. A single-end tensioner according to claim 2, characterized in that: It also includes a crimping sleeve, which is arranged on one side of the screw rod close to the threaded section. A crimping hole is arranged in the crimping sleeve, and the outer diameter of the crimping sleeve is larger than the inner diameter of the threading hole.

4. A single-end tensioner according to claim 3, characterized in that: It also includes a gasket, in which a through hole is provided, and the gasket is arranged between the crimping sleeve and the screw rod.

5. A single-ended tensioner according to claim 1, characterized in that: The sleeve is provided with a cavity passing through both ends thereof, the outer surface of the expansion section of the sleeve is provided with a plurality of strip grooves arranged parallel to the axial direction of the sleeve and a plurality of arc-shaped expansion spring plates are formed on the expansion section, one end of the strip groove passes through one end of the sleeve, the outer surface of the cap is provided with a conical surface which expands with the expansion section, and the inner diameter of the cavity is larger than the minimum outer diameter of the cap and smaller than the maximum outer diameter of the cap.

6. A single-ended tensioner according to claim 5, characterized in that: A notch communicating with the other end of the strip-shaped slot is provided on the outer surface of the sleeve, the width of the notch is greater than the width of the strip-shaped slot, and the number of the notches is consistent with the number of the strip-shaped slots and corresponds one to one.

7. A single-end tensioner according to claim 5, characterized in that: The number of the strip-shaped notches is 2-6 and they are evenly arranged along the circumferential direction of the sleeve.

8. The single-ended tensioner according to claim 1, characterized in that: The length of the expansion section is greater than half the length of the sleeve.

9. A single-ended tensioner according to claim 1, characterized in that: The other end of the sleeve is provided with a second operating section, and the outer surface of the second operating section is provided with two symmetrical second plane sections.

10. A guardrail, characterized in that: It comprises a cable, at least two columns and at least one single-ended tensioner as described in any one of claims 1 to 9, wherein at least one mounting hole is provided on both side end faces of the column, at least one end of the cable is connected to the corresponding single-ended tensioner, and the single-ended tensioner passes through the mounting hole of the column on the corresponding side and is installed in the column to tighten the cable.

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