Scissor type tensioner

Abstract

The utility model is suitable for the technical field of rigging, and provides a shear type tensioner which comprises a spiral rod piece with external threads, four supporting arms, two sleeving pieces with internal threads and two self-locking structures used for tensioning a tensioned object. The two sleeving pieces are oppositely arranged in a spaced mode, the thread directions of internal threads of the two sleeving pieces are opposite, and the spiral rod piece is in threaded connection with the two sleeving pieces; the two self-locking structures are located on the two sides of the spiral rod piece correspondingly, the two sides of each self-locking structure are each provided with a supporting arm, one end of each supporting arm is hinged to the corresponding self-locking structure, the other end of each supporting arm is hinged to the sleeving piece, an annular structure is defined by the supporting arms, and a clamping space used for clamping a tensioned object is formed in each self-locking structure; the spiral rod piece is rotated to drive the two sleeving pieces to move back to back so as to drive the two self-locking structures to move oppositely and then tension the object to be tensioned. According to the utility model, the quick connection and disassembly with a tensioned object can be realized, and the operation is convenient.

Description

Technical Field

[0001] The utility model belongs to the technical field of rigging, and in particular relates to a scissor-type tensioner. Background Art

[0002] A tensioner is a type of rigging used to tighten ropes, chains, or cables. Currently, there are many types of tensioners with varying functions, but most focus on improving the tensioning structure. There have been few improvements to the connection between the tensioner and the object being tensioned. Most use a hook structure, requiring the object to form a loop for attachment. This increases the number of steps required for operation. For objects that require frequent or quick operation (such as ropes, cables, and wire ropes), existing tensioners are relatively cumbersome to operate.

[0003] In particular, in the field of construction, during the current steel cage processing, after the main bars and stiffening hoops are welded, the next step is to place the steel cage frame formed by the main bars and stiffening hoops before the spiral stirrups are coiled on the rolling cage machine. In order for the steel cage frame to rotate smoothly on the rolling cage machine, it is necessary to first weld several annular measure bars on the periphery of the steel cage frame so that the periphery of the steel cage frame formed by the main bars and stiffening hoops is a complete circular ring. After the spiral stirrups are coiled on the steel cage, these measure bars have completed their own functions, thus forming redundancy on the formed steel cage, causing waste. If these measure bars can be recycled, a large amount of steel raw materials and costs will be saved. Therefore, it is very necessary to provide a tensioner that can be quickly installed and disassembled. Utility Model Content

[0004] The purpose of the embodiments of the present utility model is to provide a scissor-type tensioner, aiming to solve the problem of cumbersome operation of the tensioners in the prior art.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] A scissor-type tensioner, comprising a spiral rod with an external thread, four support arms, two sockets with an internal thread, and two self-locking structures for tightening a tensioning object; the two sockets are spaced apart from each other, and the internal threads of the two sockets have opposite thread directions, and the spiral rod is threadedly connected to the two sockets;

[0007] The two self-locking structures are respectively located on both sides of the spiral rod, and each of the two sides of the self-locking structure is provided with a support arm, and one end of the support arm is hinged to the self-locking structure, and the other end of the support arm is hinged to the sleeve, and the support arms form an annular structure. The self-locking structure has a clamping space for clamping and tightening an object;

[0008] Rotating the spiral rod can drive the two sleeve members to move in opposite directions, thereby driving the two self-locking structures to move toward each other and tighten the tightening object.

[0009] Furthermore, the self-locking structure includes a lock shell, a return torsion spring and a locking block, the opposite ends of the lock shell are respectively hinged to one of the support arms, the lock shell has a first end and a second end arranged opposite to each other, the first end is rotatably connected to one end of the locking block, and the return torsion spring is connected between the first end and the locking block, and the locking block rotates toward the second end under the torsion force of the return torsion spring so that the clamping space is formed between the other end of the locking block and the second end.

[0010] Furthermore, the locking block has a third end and a fourth end arranged relatively to each other, the third end is connected to the first end, and the fourth end is close to the second end under the torsion force of the return torsion spring, and the fourth end is provided with several anti-slip teeth for clamping and tightening the object.

[0011] Furthermore, in the rotation direction of the locking block under the torsion force of the return torsion spring, the distance between the apex of each anti-slip tooth and the rotation axis of the locking block gradually decreases.

[0012] Furthermore, anti-slip grooves are provided on the inner wall of the second end.

[0013] Furthermore, a rotating wrench is provided on the locking block.

[0014] Furthermore, the spiral rod member includes a handle and a screw rod, the handle is fixedly connected to one end of the screw rod, and both ends of the screw rod are respectively threadedly connected to the two socket members.

[0015] Furthermore, the lock housing and the support arm, as well as the sleeve and the support arm are connected via a hinge shaft.

[0016] Compared with the prior art, the embodiments of the present invention have the following beneficial effects:

[0017] The utility model provides a clamping space for clamping a tensioning object in the self-locking structure. After the tensioning object passes through the clamping space on the self-locking structure, the tensioning object is clamped by the self-locking structure. The two sockets are driven to move backwards by rotating the spiral rod, and then the self-locking structures are driven to move toward each other, so that the tensioning object can be tightened, and the tensioner and the tensioning object can be quickly connected and disassembled. It is easy to operate. The scissor-type tensioner is used to fix the measure bars in the process of processing the steel cage, and the measure bars can be quickly installed, disassembled and recycled, thereby saving a large amount of steel raw materials and costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1This is a schematic diagram of the three-dimensional structure of the scissor-type tensioner provided by an embodiment of the utility model;

[0019] Figure 2 This is a schematic diagram of the main structure of the scissor-type tensioner provided by an embodiment of the utility model;

[0020] Figure 3 yes Figure 1 Schematic diagram of the self-locking structure decomposition;

[0021] Figure 4 is to place the tensioned object on Figure 1 A schematic diagram of the structure before locking in the self-locking structure;

[0022] Figure 5 is to place the tensioned object on Figure 1 A schematic diagram of the structure after being locked in the self-locking structure;

[0023] Figure 6 This is a schematic diagram of the use of the scissor-type tensioner provided by an embodiment of the utility model for fixing the measure bars during the processing of the steel cage.

[0024] The reference numerals in the figures are:

[0025] 1. Screw rod; 11. Turning handle; 12. Screw rod; 2. Socket; 3. Self-locking structure; 31. Lock housing; 310. Articulated ear plate; 311. First end; 312. Second end; 32. Reset torsion spring; 33. Locking block; 331. Third end; 332. Fourth end; 333. Anti-slip teeth; 34. Turning wrench; 4. Clamping space; 5. Accommodating space; 6. Tensioning object; 7. Articulated shaft; 8. Support arm; 9. Main reinforcement; 10. Stiffening hoop; 20. Measure reinforcement; 100. Scissor-type tensioner. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0027] In the description of the present invention, it should be noted that if the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the utility model product is usually placed when in use. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0028] See Figures 1 to 5 As shown, the utility model provides a scissor-type tensioner 100. The scissor-type tensioner 100 includes a spiral rod 1 with an external thread, four support arms 8, two sockets 2 with internal threads, and two self-locking structures 3 for tightening a tensioning object 6; the two sockets 2 are arranged at relative intervals, and the thread directions of the internal threads of the two sockets 2 are opposite, and the spiral rod 1 is threadedly connected to the two sockets 2; the two self-locking structures 3 are respectively located on both sides of the spiral rod 1, and the two self-locking structures 3 are symmetrically arranged about the axis of the spiral rod 1. A support arm 8 is provided on both sides of each self-locking structure 3, and one end of the support arm 8 is hinged to the self-locking structure 3, and the other end of the support arm 8 is hinged to the socket 2, and the support arms 8 form an annular structure. The self-locking structure 3 has a clamping space 4 for clamping the tensioning object 6 (such as a rope, steel cable, wire rope, measure bar 20, etc.).

[0029] Since the thread directions of the internal threads on the two socket parts 2 are set in opposite directions, that is, in the same direction along the axis of the spiral rod 1, the internal thread direction on one socket part 2 is clockwise, and the internal thread direction on the other socket part 2 is counterclockwise, when the spiral rod 1 rotates, the two socket parts 2 move toward or away from each other, and the two ends of the support arm 8 are respectively hinged to the self-locking structure 3 and the socket part 2, so that the four support arms 8 can be movably connected to form a parallelogram mechanism. Therefore, by rotating the spiral rod 1, the two socket parts 2 can be driven to move away from each other, so as to drive the two self-locking structures 3 to move toward each other and tighten the tensioning object 6.

[0030] As an embodiment, the self-locking structure 3 includes a lock housing 31, a return torsion spring 32, and a locking block 33. The opposite ends of the lock housing 31 are respectively hinged to a support arm 8. Specifically, hinged lugs 310 are provided at the opposite ends of the lock housing 31. The hinged lugs 310 are connected to the support arm 8 via a hinge shaft 7. The lock housing 31 has a first end 311 and a second end 312 that are oppositely disposed. The first end 311 is rotatably connected to one end of the locking block 33, and the return torsion spring 32 is connected between the first end 311 and the locking block 33. Under the torsion force of the return torsion spring 32, the locking block 33 rotates toward the second end 312 and can rotate to a position opposite to the second end 312 and stop, so that a clamping space 4 is formed between the other end of the locking block 33 and the second end 312.

[0031] See Figure 3As shown, in this embodiment, the first end 311 is bent downward at the upper end of the lock shell 31, and the second end 312 is bent upward at the lower end of the lock shell 31, so that a accommodating space 5 for accommodating the locking block 33 is formed on the lock shell 31, and the first end 311 is rotatably connected to the upper end of the locking block 33 through a pin shaft, the pin shaft passes through the center of the return torsion spring 32, and the two ends of the return torsion spring 32 are respectively connected to the first end 311 and the locking block 33, and the locking block 33 is rotated into the accommodating space 5 under the torsion force of the return torsion spring 32, and the lower end of the locking block 33 can be arranged relative to the second end 312, so that the above-mentioned clamping space 4 is formed between the lower end of the locking block 33 and the second end 312.

[0032] As an implementation method, see Figure 3 、 Figure 4 as well as Figure 5 As shown, the locking block 33 has a third end 331 and a fourth end 332 which are arranged opposite to each other, the third end 331 is connected to the first end 311, and the fourth end 332 is close to the second end 312 under the torsional force of the return torsion spring 32, and can rotate to a position opposite to the second end 312 and stop. The rotation stroke of the locking block 33 can be limited by setting a limit piece in the lock shell 31 or by utilizing the torsional force of the return torsion spring 32 itself to limit the rotation stroke of the locking block 33, so as to limit the fourth end 332 from rotating to a position opposite to the second end 312 and then stop, so that the clamping space 4 formed between the fourth end 332 and the second end 312 can clamp and fix the tensioning object 6. The fourth end 332 is provided with several anti-slip teeth 333 for clamping the tensioning object 6, and the inner wall of the second end 312 is provided with anti-slip grooves, so that after the tensioning object 6 is placed in the clamping space 4, the friction between the tensioning object 6 and the lock shell 31 can be increased, and the tensioning object 6 can be clamped and fixed in the clamping space 4 by the anti-slip teeth 333 and the anti-slip grooves.

[0033] In the direction of rotation of the locking block 33 under the torsion of the return torsion spring 32, the distance between the apex of each anti-slip tooth 333 and the rotation axis of the locking block 33 gradually decreases. As the locking block 33 rotates toward the second end 312 in the torsion direction of the return torsion spring 32, the left anti-slip tooth 333 on the fourth end 332 moves closer to the lower inner bottom wall of the lock housing 31, thereby increasing the depth of engagement of the anti-slip tooth 333 with the tensioning object 6, thereby improving the locking effect on the tensioning object 6. In this embodiment, the locking block 33 has a triangular structure, and a rotating wrench 34 is provided on the left side of the locking block 33 to facilitate rotation against the torsion of the return torsion spring 32. The side length of one side of the rotating wrench 34 is greater than the side length of the other side thereof. The end of the third end 331 is arcuate, and the anti-slip tooth 333 is provided on the arcuate end of the third end 331.

[0034] As an embodiment, the screw rod 1 includes a handle 11 and a screw rod 12. The handle 11 is fixedly connected to one end of the screw rod 12, and the two ends of the screw rod 12 are respectively threadedly connected to the two socket members 2. The handle 11 can be used to easily rotate the screw rod 12, so that the screw rod 12 drives the two socket members 2 to move toward or away from each other along the axis of the screw rod 12.

[0035] It should be noted that in the current steel cage processing process, after the main bars 9 and the reinforcing hoops 10 are welded, the next step is to place the steel cage frame formed by the main bars 9 and the reinforcing hoops 10 before the spiral hoops are coiled on the rolling cage machine. In order for the steel cage frame to rotate smoothly on the rolling cage machine, it is necessary to first weld several annular measure bars 20 around the outer periphery of the steel cage frame so that the outer periphery of the steel cage frame formed by the main bars 9 and the reinforcing hoops 10 is a complete circular ring. After the spiral hoops are coiled on the steel cage, these measure bars 20 have completed their own functions, thus forming redundancy on the formed steel cage, causing waste. Figures 1 to 6 As shown, the scissor-type tensioner 100 provided by the present invention can realize the reuse of the above-mentioned measure bar 20. Specifically, the measure bar 20 is first cut out to be slightly shorter than the circumference of the steel cage, and is bent into a ring and put on the steel cage without welding. The end of the measure bar 20 is fixed by the self-locking structure 3 on the scissor-type tensioner 100 provided by the present invention (such as Figure 6 As shown, a complete ring is formed, fulfilling its original function. The cage frame, with the reinforcement bars 20 installed, is placed on the rolling cage machine. When the spiral stirrups are coiled onto the reinforcement bars 20, the rolling cage machine is stopped and the rotating wrench 34 on the locking block 33 is activated to quickly remove the reinforcement bars 20 for recycling. The rolling cage machine is restarted and the above steps are repeated to complete the production of the reinforcement cage.

[0036] In summary, when the scissor-type tensioner 100 provided by the present invention is used, the locking block 33 is rotated by rotating the wrench 34 to overcome the torsion force of the reset torsion spring 32, so that the locking block 33 is away from the lock housing 31 (such as Figure 4As shown), the end of the object to be tightened 6 is passed through the clamping space 4 and placed in the two lock shells 31, the wrench 34 is loosened and turned, and the locking block 33 is reset and locked under the torsion of the reset torsion spring 32, and the end of the tightening object 6 is clamped in the clamping space 4 through the anti-slip teeth 333. The handle 11 is turned to drive the screw 12 to rotate, and the two sockets 2 move away from each other under the thread drive of the screw 12. The socket 2 and the self-locking structure 3 are hinged through the support arm 8, thereby driving the two self-locking structures 3 to move toward each other (close to the screw 12). At this time, the tensioning object 6 tends to move outward relative to the self-locking structure 3. Under the combined force of the anti-slip teeth 333 and the anti-slip grooves on the tensioning object 6, the tensioning object 6 will drive the locking block 33 to move outward. Due to the arcuate edge and the anti-slip teeth 333 on the locking block 33, after the locking block 33 moves outward, the anti-slip teeth 333 further squeeze the tensioning object 6, further locking the tensioning object 6 (such as Figure 5 As shown), the greater the force, the tighter the lock, which can prevent the tensioning object 6 from slipping. The tensioning object 6 is driven inward by the self-locking structure 3 to achieve a tightening effect, and the tensioner and the tensioning object 6 are quickly connected and disassembled. It is easy to operate, and the scissor-type tensioner 100 can be used for fixing the reinforcement 20 during the processing of the steel cage (as shown). Figure 6 As shown), the quick installation and recycling of the reinforcement bars 20 can be achieved, thereby saving a large amount of steel bar raw materials and costs.

[0037] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A scissor-type tensioner, characterized in that: The invention comprises a spiral rod with an external thread, four support arms, two sleeves with an internal thread, and two self-locking structures for tightening the tensioning object; the two sleeves are relatively spaced apart, and the thread directions of the internal threads of the two sleeves are opposite, and the spiral rod is threadedly connected to the two sleeves; The two self-locking structures are respectively located on both sides of the spiral rod, and each of the two sides of the self-locking structure is provided with a support arm, and one end of the support arm is hinged to the self-locking structure, and the other end of the support arm is hinged to the sleeve, and the support arms form an annular structure. The self-locking structure has a clamping space for clamping and tightening an object; Rotating the spiral rod can drive the two sleeve members to move in opposite directions, thereby driving the two self-locking structures to move toward each other and tighten the tightening object.

2. The scissor-type tensioner according to claim 1, characterized in that: The self-locking structure includes a lock shell, a return torsion spring and a locking block. The opposite ends of the lock shell are respectively hinged to one of the support arms. The lock shell has a first end and a second end arranged opposite to each other. The first end is rotatably connected to one end of the locking block, and the return torsion spring is connected between the first end and the locking block. The locking block rotates toward the second end under the torsion force of the return torsion spring, so that the clamping space is formed between the other end of the locking block and the second end.

3. The scissor-type tensioner according to claim 2, characterized in that: The locking block has a third end and a fourth end that are relatively arranged. The third end is connected to the first end. The fourth end is close to the second end under the torsion force of the return torsion spring. The fourth end is provided with several anti-slip teeth for clamping and tightening the object.

4. The scissor-type tensioner according to claim 3, characterized in that: In the rotation direction of the locking block under the torsion force of the return torsion spring, the distance between the apex of each anti-slip tooth and the rotation axis of the locking block gradually decreases.

5. The scissor-type tensioner according to claim 2, characterized in that: Anti-slip grooves are provided on the inner wall of the second end.

6. The scissor-type tensioner according to claim 2, characterized in that: The locking block is provided with a rotation wrench.

7. The scissor-type tensioner according to claim 1, characterized in that: The spiral rod comprises a handle and a screw rod, wherein the handle is fixedly connected to one end of the screw rod, and both ends of the screw rod are respectively threadedly connected to the two socket members.

8. The scissor-type tensioner according to claim 2, characterized in that: The lock housing and the support arm, as well as the sleeve and the support arm, are connected via a hinge shaft.

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