Metal reinforcing connector for historic building timber frame structures

Abstract

This utility model relates to the field of building reinforcement technology, specifically a metal reinforcement connector for a wooden frame structure of a historical building. It includes a positioning sleeve and a positioning post. The positioning sleeve has a positioning groove at one end near the positioning post. The positioning groove has storage slots at both its upper and lower ends. A locking block is slidably installed in each storage slot. A spring is installed between the locking block and the storage slot. The outer wall of the positioning post has an annular groove. When the positioning post is inserted into the positioning groove, the annular groove on its outer wall contacts the locking block in the storage slot at both ends of the positioning groove. When not under pressure, the locking block extends outward from the storage slot due to the spring. As the positioning post continues to be inserted, the inclined surface of the locking block automatically retracts inward under pressure. Once the annular groove moves to the position of the locking block, the spring pushes the locking block out and embeds it into the annular groove, thus completing the automatic locking.

Description

Technical Field

[0001] This utility model relates to the field of building reinforcement technology, specifically a metal reinforcement connector for a wooden frame structure of a historical building. Background Technology

[0002] As is well known, in the process of repairing and reinforcing historical buildings, especially traditional wooden buildings, how to improve structural safety while preserving their original appearance and historical value to the greatest extent is an important issue facing the field of cultural relic protection and building restoration. Existing reinforcement methods mainly include external metal corner brackets, steel hoops, bolt connections, etc. Although they have enhanced the strength of the joints to a certain extent, they generally have the following problems.

[0003] Traditional exposed metal components damage the original visual aesthetics of buildings and affect the overall presentation of traditional style. Traditional connectors lack self-centering and automatic locking functions, the installation process is complicated, and the construction precision requirements are high. Moreover, the restoration of historical buildings must follow the basic principles of "minimal intervention" and "identifiable but not abrupt". Summary of the Invention

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this utility model provides a metal reinforcement connector for the wooden frame structure of historical buildings.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: a metal reinforcement connector for a wooden frame structure of a historical building, comprising a positioning sleeve and a positioning post. The positioning sleeve has a positioning groove at one end near the positioning post. Both the upper and lower ends of the positioning groove have storage slots. A locking block is slidably installed in the storage slot. A spring is installed between the locking block and the storage slot. An annular groove is formed on the outer wall of the positioning post. The ends of the two sets of locking blocks away from the spring are both designed with bevels. The locking block and the annular groove are adapted to each other.

[0008] Furthermore, the present invention is improved in that the end of the positioning post near the positioning groove is designed with a rounded corner.

[0009] Furthermore, an improvement of this utility model is that a pre-embedded column is installed at the end of the positioning column away from the positioning groove.

[0010] Furthermore, the present invention is improved in that the outer walls of both the embedded column and the positioning sleeve are threaded.

[0011] Furthermore, an improvement of this utility model is that a positioning ring is installed at the end of the pre-embedded column near the positioning column.

[0012] Furthermore, the present invention is improved in that a limiting ring with an oblique angle is installed at the end of the annular groove away from the positioning ring, and a limiting groove is formed in the positioning groove, wherein the limiting ring and the limiting groove are adapted to each other.

[0013] Furthermore, the present invention is improved in that the diameter of the end of the positioning post closest to the positioning ring with the positioning groove as the axis is greater than the diameter of the end furthest from the limiting ring.

[0014] Furthermore, the present invention is improved in that the positioning groove and the positioning post are made of high-strength carbon steel as a whole, and the surface is passivated.

[0015] (III) Beneficial Effects

[0016] Compared with the prior art, this utility model provides a metal reinforcement connector for the wooden frame structure of a historical building, which has the following advantages:

[0017] The metal reinforcement connectors for the wooden frame structure of this historical building utilize positioning sleeves and positioning posts. A spring-driven locking block engages with an annular groove on the positioning post to achieve automatic locking after insertion. The inclined design allows the locking block to automatically retract during insertion and pop out to lock once it reaches the predetermined position, eliminating the need for additional operations and improving construction efficiency. The stepped diameter design of the positioning post facilitates insertion guidance. The limiting ring and limiting groove further enhance axial positioning accuracy and limit the locking block after support. The connectors are embedded inside the wooden components or at joints, without compromising the aesthetics of the facade or affecting the display of traditional style, thus balancing protection and functionality. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a three-dimensional structural diagram of the positioning sleeve of this utility model;

[0020] Figure 3 This is a three-dimensional structural diagram of the positioning column of this utility model;

[0021] Figure 4 This is a schematic diagram of the three-dimensional structure of the positioning sleeve of this utility model.

[0022] In the diagram: 1. Positioning sleeve; 2. Positioning post; 3. Positioning groove; 4. Storage groove; 5. Locking block; 6. Spring; 7. Annular groove; 8. Embedded post; 9. Positioning ring; 10. Limiting ring; 11. Limiting groove. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figure 1-4 A metal reinforcement connector for a historical building's wooden frame structure includes a positioning sleeve 1 and a positioning post 2. The positioning sleeve 1 has a positioning groove 3 at one end near the positioning post 2. The positioning groove 3 has storage slots 4 at both its upper and lower ends. A locking block 5 is slidably installed in each storage slot 4. A spring 6 is installed between the locking block 5 and the storage slot 4. An annular groove 7 is formed on the outer wall of the positioning post 2. The ends of both sets of locking blocks 5 away from the spring 6 are beveled. The locking blocks 5 and the annular groove 7 are compatible. In this embodiment, during use, the historical building's wooden components requiring reinforcement are appropriately trimmed to ensure the integrity of their original structure. The positioning post 2 and positioning sleeve 1 are installed at the connection points of the wooden components requiring reinforcement (such as beam-column junctions). The positioning post 2 with the annular groove 7 is inserted into the positioning sleeve 1. The positioning groove 3 at the end of the positioning sleeve 1 near the positioning post 2 guides the positioning post 2 to accurately enter the connection position. When the positioning post 2 is inserted into the positioning groove 3, the annular groove 7 on its outer wall will contact the locking block 5 in the storage groove 4 set at the upper and lower ends of the positioning groove 3. When the locking block 5 is not under pressure, it extends outward from the storage groove 4 due to the action of the spring 6. As the positioning post 2 continues to be inserted, the inclined design of the locking block 5 causes it to automatically retract inward after being under pressure. Once the annular groove 7 moves to the position of the locking block 5, the spring 6 pushes the locking block 5 to pop out and embed into the annular groove 7, thus completing the automatic locking. Utilizing the high strength characteristics of metal materials, the connection rigidity and load-bearing capacity between wooden components are effectively enhanced. Since the connectors are hidden inside the wood or at the joint, the metal parts will not be exposed on the exterior facade or in visible parts. The embedded connectors are not easy to oxidize, rust, or wear, thus preserving the original visual beauty and traditional style of the historical building to the greatest extent, avoiding interference from external additional components on the original appearance of the building, and meeting the restoration principles of "minimal intervention" and "identifiable but not abrupt".

[0025] Preferably, in this embodiment, the end of the positioning post 2 near the positioning groove 3 is designed with rounded corners. The rounded corners make the front end of the positioning post 2 have a smooth transition shape, reducing the frictional resistance during insertion. During the installation process, even if there is a slight deviation or the alignment is not completely accurate, the rounded corners can play an automatic guiding role, helping the positioning post 2 to smoothly enter the positioning groove 3.

[0026] Preferably, in this embodiment, a pre-embedded column 8 is installed at the end of the positioning column 2 away from the positioning groove 3. The pre-embedded column 8 penetrates into the wood to form a firm mechanical anchor, so that the metal connector and the wooden component will not loosen due to vibration, wind load or seismic force. The pre-embedded column 8 can transmit the external force from the positioning column 2 to the wood interior more evenly, reducing the direct pressure on the wood surface.

[0027] Preferably, in this embodiment, the outer walls of the pre-embedded column 8 and the positioning sleeve 1 are both threaded. When embedded in the wood, they can be "screwed" into the wood by rotation, forming a screw-like interlocking effect. This method has stronger pull-out resistance and anti-slip capability than insertion on a smooth surface, effectively preventing the connector from loosening or falling off. The threads increase the friction and mechanical interlocking force between the metal and the wood, improving the anchoring effect.

[0028] Preferably, in this embodiment, a positioning ring 9 is installed at one end of the pre-embedded column 8 near the positioning column 2. The positioning ring 9 can play a good limiting role, ensuring that the pre-embedded column 8 maintains the correct depth and direction when embedded in the wood, avoiding excessive insertion or deviation, thereby improving installation accuracy and consistency. This not only helps to ensure the overall stability of the connector, but also improves construction efficiency. The positioning ring 9 can enhance the connection strength between the pre-embedded column 8 and the wood. When the pre-embedded column 8 is inserted into the wood, the positioning ring 9 can serve as a support point to prevent the connector from sliding or loosening during the stress process. Especially when subjected to pull-out force or shear force, it can effectively disperse stress and reduce the risk of local cracking of the wood.

[0029] Preferably, in this embodiment, a limiting ring 10 with an angled setting is installed at the end of the annular groove 7 away from the positioning ring 9, and a limiting groove 11 is opened in the positioning groove 3. The limiting ring 10 and the limiting groove 11 are adapted to each other. First, the cooperation between the limiting ring 10 and the limiting groove 11 can achieve more accurate axial positioning, ensuring that the positioning column 2 will not move back and forth or shift axially under the support of the locking block 5 after being inserted into the positioning sleeve 1, thereby improving the stability and reliability of the entire connection structure. This is especially important for wooden building nodes that bear dynamic loads (such as wind force and seismic force). The limiting ring 10 adopts an angled design, which makes it have a good guiding effect during the insertion process. Even if there is a slight deviation, it can be smoothly guided into the limiting groove 11, avoiding installation jamming or forced insertion that could damage the component. This self-alignment function improves construction efficiency and reduces the excessive requirements for installation accuracy.

[0030] Preferably, in this embodiment, the diameter of the end of the positioning post 2 closest to the positioning ring 9 with the positioning groove 3 as the axis is larger than the diameter of the end furthest from the limiting ring 10. This stepped variable diameter design helps to achieve better guidance and self-centering function. When the positioning post 2 is inserted into the positioning groove 3, the end with the smaller diameter contacts the entrance of the positioning groove 3 first, which can automatically guide the positioning post 2 to enter in the correct direction, reduce the centering difficulty during installation, and improve assembly efficiency.

[0031] Preferably, in this embodiment, the positioning groove 3 and the positioning column 2 are made of high-strength carbon steel and the surface is passivated. High-strength carbon steel has excellent tensile, compressive and shear strength, which can effectively bear various loads on the wooden joint, significantly enhance the load-bearing capacity and structural stability of the connection, and is especially suitable for the reinforcement of ancient buildings that require long-term load-bearing or high seismic resistance. Compared with ordinary steel or aluminum alloy, high-strength carbon steel has higher hardness and wear resistance, which can effectively resist fatigue damage caused by frequent insertion and removal, vibration or environmental changes, thereby extending the service life of the connector and reducing the frequency of later maintenance.

[0032] To illustrate the possible application scenarios, technical principles, implementable specific solutions, and achievable objectives and effects of this application in detail, the following description, in conjunction with the listed specific embodiments and accompanying drawings, provides a detailed explanation. The embodiments described herein are merely illustrative of the technical solutions of this application and are therefore intended to limit the scope of protection of this application.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A metal reinforcing connector for a wooden frame structure of a historical building, comprising a positioning sleeve (1) and a positioning column (2), characterized in that: The positioning sleeve (1) has a positioning groove (3) at one end near the positioning post (2). The positioning groove (3) has a storage groove (4) at both the upper and lower ends. A locking block (5) is slidably installed in the storage groove (4). A spring (6) is installed between the locking block (5) and the storage groove (4). The outer wall of the positioning post (2) has an annular groove (7). The ends of the two sets of locking blocks (5) away from the spring (6) are both designed with a slope. The locking block (5) and the annular groove (7) are compatible.

2. The metal reinforcing connector for a historical building's wooden frame structure according to claim 1, characterized in that: The end of the positioning post (2) near the positioning groove (3) has a rounded corner design.

3. The metal reinforcing connector for a historical building's wooden frame structure according to claim 1, characterized in that: The positioning column (2) is equipped with a pre-embedded column (8) at the end away from the positioning groove (3).

4. The metal reinforcing connector for a wooden frame structure of a historical building according to claim 3, characterized in that: The outer walls of both the embedded column (8) and the positioning sleeve (1) are threaded.

5. A metal reinforcing connector for a wooden frame structure of a historical building according to claim 4, characterized in that: A positioning ring (9) is installed at one end of the pre-embedded column (8) near the positioning column (2).

6. A metal reinforcing connector for a wooden frame structure of a historical building according to claim 5, characterized in that: An obliquely angled limit ring (10) is installed at one end of the annular groove (7) away from the positioning ring (9), and a limit groove (11) is opened in the positioning groove (3). The limit ring (10) and the limit groove (11) are adapted to each other.

7. A metal reinforcing connector for a historical building's wooden frame structure according to claim 6, characterized in that: The diameter of the end of the positioning post (2) that is closer to the positioning ring (9) with the positioning groove (3) as the axis is greater than the diameter of the end that is farther away from the limiting ring (10).

8. A metal reinforcing connector for a historical building's wooden frame structure according to claim 7, characterized in that: The positioning groove (3) and the positioning post (2) are made of high-strength carbon steel and the surface is passivated.

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