Positioning joint structure of steel bars with infinitely extendable connection

Abstract

The present invention discloses a positioning joint structure of steel bars that can be infinitely extended and connected, comprising a plurality of joints and a pivot connector; wherein the joints are mutually locked and linked through the pivot connector, and the pivot connector has an internal thread corresponding to the joints; the aforementioned joints have single or multi-thread screw threads, and a guide wire structure is provided at the contact end between the joints and the pivot connector; the aforementioned guide wire structure includes a guide wire portion provided at the front end of the joints, and the thread diameter of the guide wire portion is smaller than the thread diameter of the joints; the guide wire structure also includes an inner guide wire portion provided in the pivot connector and at the initial contact end of the joints, and the diameter of the inner guide wire portion is larger than the inner thread diameter of the pivot connector; the locking speed can be increased through the design of the screw threads, and the guide wire portion or the inner guide wire portion can make it easier for the user to lock the joints and the pivot connector, thereby improving the locking efficiency.

Description

Technical Field

[0001] The present invention relates to a steel bar positioning joint structure; in particular, to a steel bar positioning joint structure capable of infinitely extending and connecting. Background Art

[0002] See also Figure 1 , Figure 1 Schematic diagram of the positioning joint structure of existing steel bars.

[0003] The existing steel bar positioning joint structure 1 includes a joint 11 and a pivot 12 for locking the joint 11. The existing joint 11 is usually directly screw-formed from the steel bar 2. After the screw-formed joint 11, the joint 11 can be locked with the pivot 12. After each joint 11 is locked with the pivot 12, the connection between the joints 11 can be completed, forming a steel bar positioning joint structure 1 that can be extended and joined.

[0004] However, after a period of use, the existing steel bar positioning joint structure was found to have the following deficiencies:

[0005] Inconvenient locking: When assembling rebars, if errors occur at the rebar connections, it will be difficult for the various joints to enter the pivot joint for locking. Therefore, the user must very accurately align the internal threads of the joints and the pivot joint before starting the positioning and locking. This often causes inconvenience to the user during locking.

[0006] The tensile strength after locking is limited: When the thread of the joint is formed, the thread is usually formed directly through the steel bar. At this time, the thread diameter of the joint is smaller than or equal to the diameter of the steel bar. Therefore, after the joint is locked with the hinge, its tensile strength is limited. Even if strong tension or external force is applied to the steel bar, the locked state is easily damaged by external forces. Summary of the Invention

[0007] The main purpose of the present invention is to provide a positioning joint structure for steel bars, in particular a positioning joint structure for steel bars that can be infinitely extended and connected and has stronger and tighter locking connection capabilities.

[0008] To achieve the above-mentioned objectives, the present invention provides a positioning joint structure for connecting steel bars that can be infinitely extended, comprising a plurality of joint members and a pivotal connector.

[0009] The plurality of joints are locked and connected by a pivot joint, and can be applied to positioning joint structures of construction applications such as steel bars, continuous walls, steel beams and columns, etc.

[0010] The pivot connector has an internal thread corresponding to the joint member, and the thread diameter of the joint member corresponds to the diameter of the internal thread.

[0011] Among them, the connecting member has double-line screw threads, triple-line screw threads, or multi-line screw threads, and the contact end of the aforementioned connecting member and the pivot is provided with a wire thread structure; the efficiency of the locking action can be improved by the design of double-line, triple-line, or multi-line screw threads; the aforementioned double-line screw threads are thread-formed by two threads with an opening angle difference of 180 degrees, the triple-line screw threads are thread-formed by three threads with an opening angle difference of 120 degrees, and so on.

[0012] The advantage of the aforementioned joint having double-line, triple-line or multi-line screw threads for locking is that the locking lead is large and the tightening speed is faster. The speed of tightening the double-line screw thread can be increased by about 1 times compared with the single-line screw thread, that is, turning 1 turn of the double-line screw thread is equivalent to turning 2 turns of the single-line screw thread, and the speed of tightening the triple-line screw thread can be increased by about 3 times compared with the single-line screw thread, that is, turning 1 turn of the triple-line screw thread is equivalent to turning 3 turns of the single-line screw thread, and the same is true for multi-line screw threads. Therefore, the design of the multi-line screw thread can effectively improve the efficiency of the locking action in a multiplier manner.

[0013] Among them, the wire tooth structure includes a wire portion arranged at the front end of the connector, and the thread diameter of the aforementioned wire portion is smaller than the thread diameter of the connector, that is, the thread diameter of the wire portion is also smaller than the internal thread diameter of the pivot (the internal thread diameter corresponds to the thread diameter of the connector). Therefore, when the connector initially contacts the pivot, it can enter the pivot more easily through the design of the smaller thread diameter of the wire portion. In this way, when the connector and the pivot are initially locked, the user can save time in finding the corresponding locking peaks or valleys of the internal threads and the connector. It can also be more convenient for the user to lock the connector and the pivot when the pivot and the connector are used for steel bar assembly, solving the problem of corresponding locking position errors and thereby improving the locking efficiency.

[0014] In which, the wire tooth structure includes an inner wire portion arranged at the starting contact end of the hinge and the joint member, and the diameter of the inner wire portion is larger than the inner thread diameter of the hinge, that is, the diameter of the inner wire portion is also larger than the thread diameter of the joint member (the inner thread diameter corresponds to the thread diameter of the joint member), so the joint member can enter the hinge more easily through the inner wire portion when it starts to contact the hinge. In this way, when the joint member and the hinge are initially locked, the user can save time in finding the corresponding screw peaks or screw valleys of the hinge internal thread and the joint member for locking, and when the hinge and the joint member are used for steel bar assembly, the design of the inner wire portion makes it easier for the joint member to enter the hinge due to the larger thread diameter of the inner wire portion, so that it is more convenient for the user to lock the joint member and the hinge, solves the problem of corresponding locking position errors in the existing situation, and thus improves the locking efficiency.

[0015] Among them, the connector can expand the diameter of part of the original steel bar by cold-pressing expansion before its thread is formed, and then the thread is formed; and the connector will form an expanded head portion located at the front end of the connector for mutual connection, and a steel bar portion connected to the expanded head portion and maintaining the original diameter size. The thread diameter of the expanded head portion is larger than the diameter of the steel bar portion. Therefore, the expanded head portion has a larger thread diameter than the existing connector without the expanded thread diameter. Therefore, when the expanded head portion is connected and locked with the pivot, the larger thread diameter can increase the tensile strength of the connector and the pivot after locking, thereby forming a stronger and tighter locking connection effect between the connector and the pivot.

[0016] Among them, when the joint is locked and connected with the pivot, the internal thread of the pivot corresponds to the thread of the joint, and the front ends of the two joints that are locked and connected in the pivot form a conflicting connection locking state, so that the two joints are locked more tightly through the pivot and the tensile strength is also stronger.

[0017] The multi-thread screw thread pattern of the present invention is used for locking, which can increase the tightening speed. A guide wire portion is provided at the front end of the joint, or an internal guide wire portion is provided at the initial contact end between the hinge and the joint. Both the guide wire portion and the internal guide wire portion can be provided, or either one of the two can be provided. This can facilitate the user to lock the joint and the hinge, thereby improving the locking efficiency. When the aforementioned joints are locked and connected in the hinge, a contacting connection locking state can be formed at the front ends of the two joints, achieving an extremely tight tightening state, so that a stronger and tighter locking connection effect can be formed when the connected steel bars are infinitely extended and positioned. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 : Schematic diagram of the existing steel bar positioning joint structure;

[0019] Figure 2 : A schematic diagram of a positioning joint structure of infinitely extendable connected steel bars according to a first preferred embodiment of the present invention;

[0020] Figure 3 : A schematic diagram of the conductor portion of the positioning joint structure of the infinitely extendable connected steel bars according to the first preferred embodiment of the present invention;

[0021] Figure 4 : A schematic diagram of the inner conductor portion of the positioning joint structure of the infinitely extendable connected steel bars according to the first preferred embodiment of the present invention;

[0022] Figure 5 : A schematic diagram of a cold-pressed expansion head of a positioning joint structure for infinitely extendable connected steel bars according to a first preferred embodiment of the present invention;

[0023] Figure 6: A schematic diagram of the locking operation of the positioning joint structure of the infinitely extendable steel bars of the first preferred embodiment of the present invention;

[0024] Figure 7 : Schematic diagram of the joint piece and the conductor portion of the positioning joint structure of the infinitely extendable steel bars of the second preferred embodiment of the present invention;

[0025] Figure 8 : Schematic diagram of the inner wire portion and locking action of the positioning joint structure of the infinitely extendable connected steel bars of the second preferred embodiment of the present invention.

[0026] In the picture:

[0027] 3. Positioning joint structure for connecting steel bars that can be infinitely extended; 31. Joint; 311. Expanded head; 312. Steel bar portion; 32. Jointer; 321. Internal thread; 33. Wire thread structure; 331. Wire portion; 332. Internal wire portion; 4. Steel bars; 1. Positioning joint structure for existing steel bars; 11. Joint; 12. Jointer; 2. Steel bars. DETAILED DESCRIPTION

[0028] The present invention will be further described below with reference to the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it. However, the embodiments are not intended to limit the present invention.

[0029] First see Figures 2 to 4 , Figure 2 This is a schematic diagram of a positioning joint structure for infinitely extendable steel bars according to a first preferred embodiment of the present invention. Figure 3 This is a schematic diagram of the conductor portion of the positioning joint structure of the infinitely extendable steel bars according to the first preferred embodiment of the present invention. Figure 4 Schematic diagram of the inner conductor portion of the positioning joint structure of the infinitely extendable steel bars according to the first preferred embodiment of the present invention.

[0030] As shown in the figures, the positioning joint structure 3 for infinitely extendable steel bars according to the first preferred embodiment of the present invention comprises a plurality of joint members 31 and a pivotal connector 32 .

[0031] The plurality of joints 31 are locked and connected to each other via a pivot joint 32 and can be applied to positioning joint structures in construction applications such as steel bars, continuous walls, steel beams and columns, etc.

[0032] The pivot connector 32 has an internal thread 321 corresponding to the joint member 31 , and the thread diameter of the joint member 31 corresponds to the diameter of the internal thread 321 .

[0033] Among them, the present invention is characterized in that: the connecting member 31 has a double-line screw thread, a triple-line screw thread, or a multi-line screw thread, and the contact end of the aforementioned connecting member 31 and the hinge 32 is provided with a wire thread structure 33. The design of the double-line, triple-line, or multi-line screw thread can improve the efficiency of the locking action; this embodiment is explained by taking the connecting member 31 having a double-line screw thread as an example. The aforementioned double-line screw thread is formed by two threads with an opening angle difference of 180 degrees, and the triple-line screw thread is formed by three threads with an opening angle difference of 120 degrees, and so on.

[0034] The advantage of the aforementioned coupling 31 having double, triple or multi-thread screw threads for locking is that the locking lead is large and the tightening speed is faster. The speed of tightening the double-thread screw can be increased by about 1 times the tightening speed compared to the single-thread screw, that is, one turn of the double-thread screw is equivalent to 2 turns of the single-thread screw, and the speed of tightening the triple-thread screw can be increased by about 3 times the tightening speed compared to the single-thread screw, that is, one turn of the triple-thread screw is equivalent to 3 turns of the single-thread screw, and the same applies to the multi-thread screw. Therefore, the design of the multi-thread screw can effectively improve the efficiency of the locking action in a multiplier manner.

[0035] Among them, such as Figure 2 、 Figure 3 As shown, the wire tooth structure 33 includes a wire portion 331 provided at the front end of the joint 31. The thread diameter of the wire portion 331 is smaller than the thread diameter of the middle and rear end of the joint 31. In other words, the thread diameter of the wire portion 331 is also smaller than the diameter of the internal thread 321 of the pivot 32 (the diameter of the internal thread 321 corresponds to the thread diameter of the joint 31). Therefore, when the joint 31 initially contacts the pivot 32, it can more easily enter the pivot 32 through the wire portion 331. In this way, the joint 31 and the pivot 32 are connected. During the initial locking operation, the user can save time in finding the corresponding locking crests or valleys of the internal thread 321 and the joint 31. Furthermore, when the internal thread 321 and the joint 31 are used to assemble the rebar, the design of the guide portion 331 makes it easier for the joint 31 to enter the hinge 32 due to the smaller thread diameter of the front guide portion 331. This makes it more convenient for the user to lock the joint 31 and the hinge 32, solving the existing problem of corresponding locking position errors and thereby improving locking efficiency.

[0036] Among them, such as Figure 4As shown, the wire tooth structure 33 includes an inner wire portion 332 provided in the hinge 32 and at the initial contact end with the joint 31. The diameter of the inner wire portion 332 is larger than the diameter of the inner thread 321 of the hinge 32. In other words, the diameter of the inner wire portion 332 is also larger than the thread diameter of the joint 31 (the diameter of the inner thread 321 corresponds to the thread diameter of the joint 31). Therefore, when the joint 31 is initially in contact with the hinge 32, it can enter the hinge 32 more easily through the inner wire portion 332. In this way, the joint 31 and the hinge 31 are connected. When the pivot 32 is initially locked, the user can save time in finding the corresponding screw crest or screw valley of the internal thread 321 of the pivot 32 and the joint 31 for locking. Moreover, when the internal thread 321 and the joint 31 are used for steel bar assembly, the design of the inner wire portion 332 makes it easier for the joint 31 to enter the pivot 32 due to the larger thread diameter of the inner wire portion 332. Therefore, it is more convenient for the user to lock the joint 31 and the pivot 32, solving the problem of corresponding locking position error in the existing situation, thereby improving the locking efficiency.

[0037] See also Figure 5 , Figure 5 Schematic diagram of a cold-pressed expansion head for a positioning joint structure of infinitely extendable steel bars according to a first preferred embodiment of the present invention.

[0038] Among them, the connector 31 can expand the diameter of part of the original steel bar 4 by cold-pressing expansion before its thread forming, and then perform thread forming; the connector 31 will form an expansion head 311 located at the front end of the connector 31 for mutual connection, and a steel bar portion 312 connected to the expansion head 311 to maintain the original diameter. The thread diameter of the expansion head 311 is larger than the diameter of the steel bar portion 312. Therefore, the expansion head 311 has a larger thread diameter than the existing connector 31 without the expansion of the thread diameter. Therefore, after the expansion head 311 and the pivot 32 are connected and locked, the larger thread diameter can increase the tensile strength of the connector 31 and the pivot 32 after locking, thereby forming a stronger and tighter locking connection effect between the connector 31 and the pivot 32.

[0039] See also Figure 6 , Figure 6 Schematic diagram of the locking action of the positioning joint structure of the infinitely extendable steel bars according to the first preferred embodiment of the present invention.

[0040] Among them, when the coupling 31 is locked and connected with the internal thread 321 of the pivot 32, the internal thread 321 corresponds to the thread of the coupling 31, and the front ends of the two couplings 31 that are locked and connected in the pivot 32 form a conflicting connection locking state, so that the two couplings 31 are locked more tightly through the pivot 32 and the tensile strength is also stronger.

[0041] By means of the multi-thread thread pattern of the present invention, the tightening speed can be increased, and the wire portion 331 is provided at the front end of the joint 31, or the inner wire portion 332 is provided at the starting contact end of the hinge 32 and the joint 31 (such as Figure 4 As shown in FIG, a wire portion 331 and an inner wire portion 332 may be provided at the same time, or either one of the two may be provided, thereby making it more convenient for the user to lock the joint 31 and the pivot 32. When the aforementioned joints 31 are locked and connected in the pivot 32, a connection locking state in which the front ends of the two joints 31 conflict with each other can be formed, achieving an extremely tight tightening state, so that a stronger and tighter locking connection effect can be formed when the connected steel bars are infinitely extended and positioned.

[0042] See also Figure 7 、 Figure 8 , Figure 7 This is a schematic diagram of the joint member and the conductor portion of the positioning joint structure of the infinitely extendable steel bars according to the second preferred embodiment of the present invention. Figure 8 Schematic diagram of the inner conductor portion and locking action of the positioning joint structure of the infinitely extendable steel bars of the second preferred embodiment of the present invention.

[0043] The second preferred embodiment of the present invention comprises all the components of the first preferred embodiment, and differs from the first preferred embodiment in that: the connector 31 has a single-thread screw thread, not a multi-thread screw thread, and the contact end of the connector 31 and the pivot 32 is also provided with a wire thread structure 33. The aforementioned wire thread structure 33 includes a connecting wire portion 331, the thread diameter of the aforementioned wire thread portion 331 is smaller than the thread diameter of the middle and rear ends of the connector 31, and an inner wire portion 332 that cooperates and locks with the single-thread screw thread can also be provided at the initial contact end of the connector 31 in the pivot 32. The diameter of the aforementioned inner wire portion 332 is larger than the diameter of the inner thread 321 of the pivot 32, which facilitates the initial entry of the connector 31 into the pivot 32. The simple structural feature of the aforementioned single-thread screw thread can reduce the production cost of the overall structure, and at the same time, in conjunction with the wire thread structure 33, the effects of cost saving, convenient locking, and enhanced locking force and locking strength are achieved.

[0044] In summary, the advantages of the positioning joint structure of the steel bars capable of infinite extension connection of the present invention are:

[0045] 1. Convenient locking: The joint has a guide portion, and the hinge can also be equipped with an internal guide portion, so that when the joint and the hinge are initially locked, the time of finding the corresponding locking crest or valley of the internal thread and the thread is saved.

[0046] 2. Easier to engage and lock: When internal threads and joints are used in steel bar assembly, errors often occur in the corresponding locking positions. Through the design of the guide portion, the joints are easier to enter the hinge for locking due to the smaller thread straightness of the guide portion.

[0047] 3. Good locking efficiency: The connector has double-thread, triple-thread, or multi-thread threads, which increases the speed of tightening the threads during locking. The combined use of the wire thread structure makes it easier for the connector to enter the hinge for locking, thereby improving locking efficiency.

[0048] 4. Enhanced thread locking strength: The joints made by cold-pressing and then processing have threads with larger peak and valley diameters, which can form stronger tensile strength after locking.

[0049] 5. Tighter locking connection effect: The internal threads of the hinge and the joints are locked in correspondence, and the joints complete the locking action in the hinge by interfering with each other, forming a tighter locking connection effect.

[0050] The above embodiments are merely preferred embodiments for the purpose of fully illustrating the present invention, and the scope of protection of the present invention is not limited thereto. Equivalent substitutions or modifications made by those skilled in the art based on the present invention are within the scope of protection of the present invention. The scope of protection of the present invention shall be subject to the claims.

Claims

1. An improved structure of a positioning joint structure of infinitely extendable connected steel bars, comprising a plurality of joints and a pivot joint; characterized in that: The plurality of joints are mutually locked and connected by a hinge and are used to form a steel bar that is infinitely extended and connected; The pivot connector has an internal thread corresponding to the engaging member; The joint has a multi-thread thread, and the contact end between the joint and the hinge is provided with a thread thread structure, wherein: The wire thread structure includes a wire thread portion disposed at the front end of the joint, wherein the thread diameter of the wire thread portion is smaller than the thread diameter of the rear end of the joint; The wire thread structure includes an inner wire portion disposed in the hinge connector and contacting the initial end of the joint member, wherein the diameter of the inner wire portion is greater than the diameter of the inner thread of the hinge connector; The joint piece is made by expanding the diameter of part of the steel bar by cold-pressing expansion before thread forming, and then performing thread forming. It includes an expansion head located at the front end of the joint piece for interconnection, and a steel bar part connected to the expansion head to maintain the original diameter size; the thread diameter of the expansion head is larger than the diameter of the steel bar part.

2. The positioning joint structure of the infinitely extendable steel bars as claimed in claim 1, characterized in that: The engaging element has a double thread.

3. The positioning joint structure of the infinitely extendable steel bars as claimed in claim 1, characterized in that: The engaging element has a triple thread.

4. A positioning joint structure of steel bars that can be infinitely extended and connected, comprising a plurality of joint members and a pivot joint; characterized in that: The plurality of joints are mutually locked and connected by a hinge and are used as reinforcements for infinitely extending connections; The pivot connector has an internal thread corresponding to the engaging member; The joint has a single-threaded thread, and the contact end between the joint and the hinge is provided with a wire thread structure, wherein: The wire thread structure includes a wire thread portion disposed at the front end of the joint, wherein the thread diameter of the wire thread portion is smaller than the thread diameter of the rear end of the joint; The wire thread structure includes an inner wire portion in the hinge connector and at the initial contact end of the joint member, wherein the diameter of the inner wire portion is greater than the diameter of the inner thread of the hinge connector; The joint piece is made by expanding the diameter of part of the steel bar by cold-pressing expansion before thread forming, and then performing thread forming. It includes an expansion head located at the front end of the joint piece for interconnection, and a steel bar part connected to the expansion head to maintain the original diameter size; the thread diameter of the expansion head is larger than the diameter of the steel bar part.

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