A railing device

Abstract

This utility model discloses a railing device, relating to the field of railing technology. The device includes a post, a crossbar, and a wooden wedge-shaped locking strip. The post has a rectangular groove on its side; the crossbar has an insertion part at its end, with a wedge-shaped groove at its top; the locking strip has a right-angled trapezoidal cross-section and achieves mechanical self-locking by inserting its inclined surface downwards into the wedge-shaped groove. When the locking strip is inserted, its inclined surface presses against the inner wall of the wedge-shaped groove, forcing the insertion part to expand inwards and press against the inner wall of the rectangular groove, forming a horizontal compressive force; simultaneously, the top of the locking strip presses against the upper edge of the rectangular groove, resisting vertical pull-out force. This device uses an all-wood structure, eliminating the risk of corrosion from metal nails and extending its service life; at the same time, the wedge-shaped self-locking structure provides strong resistance to pull-out and impact, preventing loosening, and is suitable for outdoor scenarios such as parks and boardwalks.

Description

Technical Field

[0001] This utility model relates to the field of railing technology, specifically a railing device. Background Technology

[0002] Railings are widely used in outdoor places such as parks, with wooden railings being particularly common.

[0003] However, existing wooden railings have significant technical defects in their assembly and connection structures. One common method is to directly insert the horizontal bar into the pre-drilled slot in the post, relying solely on the friction between them for restraint. This method is prone to loosening or even detachment after long-term use or under external impact, lacking stability and impact resistance, and posing safety hazards. Another method is to fix the horizontal bar to the post using metal fasteners such as nails. Although this improves the connection strength, the metal parts are prone to corrosion when exposed to the humid outdoor environment. Corrosion not only reduces the strength of the fasteners themselves or even causes them to fail, resulting in loosening of the connection, but more seriously, the corrosion products will erode the surrounding wooden structure, accelerating the aging and damage of the wood, shortening the overall service life of the railing, and increasing maintenance costs. Therefore, we propose a railing device. Utility Model Content

[0004] This utility model addresses the shortcomings of existing technologies by providing a railing device.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A railing device includes a post and a crossbar; the side of the post is provided with a rectangular groove; the end of the crossbar is provided with a plug that matches the rectangular groove, and the top of the plug has a wedge-shaped groove; it also includes a wedge-shaped locking strip, the crossbar of which is a right trapezoid with its inclined surface facing downwards and inserted into the wedge-shaped groove to lock the crossbar onto the post.

[0007] Preferably, after the locking strip is inserted into the wedge-shaped groove, its upper surface is pressed against the upper edge of the rectangular groove.

[0008] Preferably, the upper surface of the locking strip is provided with anti-slip texture.

[0009] Preferably, the plug portion has positioning protrusions on both sides and a corresponding positioning groove on the inner wall of the rectangular groove.

[0010] Preferably, the bottom of the rectangular trough is provided with evenly distributed drainage channels.

[0011] Preferably, the drainage channel is an inclined channel, with the higher side located inside the rectangular channel and the lower side located at the opening of the rectangular channel.

[0012] Preferably, the side of the column is provided with a through hole, the axis of the through hole is orthogonal to the opening direction of the rectangular groove, the through hole is a right trapezoid and is interference fit with the locking strip; by embedding the locking strip into the through hole, and then into the wedge groove of the insertion part, the crossbar is limited on the column.

[0013] Preferably, the inclined surface of the wedge-shaped groove is located on the side closer to the inside of the rectangular groove.

[0014] Preferably, the locking strip and the wedge groove are interference fit.

[0015] Preferably, the locking strip is made of wood.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] This device uses pure wooden wedge-shaped locking strips instead of traditional metal nails or bolts. Mechanical locking is achieved by embedding the locking strips into a combination structure formed by the wedge-shaped grooves at the ends of the crossbars and the rectangular grooves in the posts. Because the locking strips themselves are made of wood and have no exposed metal parts, the risk of metal parts rusting in humid outdoor environments is fundamentally eliminated. This not only prevents decreased connection strength and loosening due to rust, but also prevents the erosion of surrounding wood by metal rust products, effectively slowing down the aging and damage process of the wood, extending the overall service life of the railing, and reducing the cost of maintenance or replacement of parts due to rust.

[0018] The device utilizes the self-locking effect created by the downward-facing insertion of a wedge-shaped locking bar (with a right-angled trapezoidal cross-section) into a wedge-shaped groove. Combined with the pressing action between the upper surface of the locking bar and the upper edge of the rectangular groove, and possible interference fit, this generates strong compressive and frictional forces in both vertical and horizontal directions. This mechanical interlocking structure is far superior to simple friction-based insertion methods, effectively resisting vibrations, thermal expansion and contraction, and external impacts during long-term use. It ensures a secure and reliable connection between the crossbar and the post, reducing the safety hazard of loosening and detachment, and improving the overall rigidity and stability of the railing. The anti-slip textured design further enhances the locking effect.

[0019] To address the challenges of damp outdoor environments, the device incorporates specialized drainage channels at the bottom of the rectangular grooves in the posts. These channels are designed as sloping grooves, with the higher side located inside the rectangular groove and the lower side at the opening, forming a flow channel that slopes outwards. This structure allows for the rapid drainage of rainwater or condensation that seeps into the channels, preventing moisture from accumulating at the bottom of the grooves and at the joints. Timely drainage is crucial for wooden structures, reducing swelling, deformation, mold, and decay caused by prolonged water immersion, thus maintaining the tightness of joints and structural strength, further ensuring the durability and safety of the railings in harsh weather conditions. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0022] Figure 2 This is a schematic diagram of the plug-in part structure of this utility model;

[0023] Figure 3 This is a cross-sectional view of the connection between the column and the crossbar of this utility model.

[0024] Figure 4 This is a schematic diagram of the locking strip insertion of this utility model;

[0025] Figure 5 This is a cross-sectional view of the internal structure of the rectangular groove of this utility model;

[0026] Figure 6 This is a schematic diagram of the locking strip structure of this utility model.

[0027] Drawing number explanation: 1. Column; 2. Horizontal bar; 3. Rectangular groove; 4. Insertion part; 5. Wedge groove; 6. Locking strip; 7. Anti-slip texture; 8. Protrusion; 9. Groove; 10. Drainage groove; 11. Through hole. Detailed Implementation

[0028] The present invention will now be described in further detail with reference to the accompanying drawings.

[0029] The following description is intended to disclose the present invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious modifications will be apparent to those skilled in the art. The basic principles of the present invention defined in the following description can be used in other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.

[0030] Those skilled in the art should understand that in the disclosure of this utility model, the terms "longitudinal", "lateral", "up", "down", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or position based on the orientation or positional relationship shown in the accompanying drawings. They are only for the purpose of simplifying the description of this utility model and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limitations on this utility model.

[0031] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number. Example

[0032] Please see Figure 1-6 A railing device includes a post 1 and a crossbar 2. The post 1 has a rectangular groove 3 on its side. The crossbar 2 has a connector 4 at its end that matches the rectangular groove 3, and the top of the connector 4 has a wedge-shaped groove 5. It also includes a wedge-shaped locking strip 6, whose cross-section is a right-angled trapezoid, with its inclined surface facing downwards, inserted into the wedge-shaped groove 5 to lock the crossbar 2 onto the post 1. When the locking strip 6 is inserted, the inclined surface generates a radial expansion force, forcing the two sides of the connector 4 to fit tightly against the inner wall of the rectangular groove 3, forming a horizontal compression fixation. Simultaneously, the vertical component force generated by the locking strip 6 pressing down on the bottom of the wedge-shaped groove 5 further strengthens the rigid connection between the crossbar 2 and the post 1. This structure completely replaces metal fasteners, avoiding the risk of corrosion.

[0033] When the locking strip 6 is inserted into the wedge-shaped groove 5, its upper surface presses against the upper edge of the rectangular groove 3. This design forms a dual limiting mechanism: in the horizontal direction, it relies on the expansion force of the inclined surface of the wedge-shaped groove 5, while in the vertical direction, it directly resists the upward pull-out force (such as strong wind or artificial lifting force) on the crossbar 2 through the physical contact between the top of the locking strip 6 and the upper edge of the groove. This pressing surface acts as a rigid stop, significantly improving the node's resistance to pull-out.

[0034] In addition, the upper surface of the locking strip 6 is provided with anti-slip texture 7, which functions to suppress micro-displacement caused by vibration. The anti-slip texture 7 increases the coefficient of friction between the locking strip 6 and the upper edge of the rectangular groove 3, preventing the locking strip 6 from retreating due to wood shrinkage or external vibration during long-term use, ensuring that the initial locking force is stable and durable, and is especially suitable for continuous load environments in densely populated places.

[0035] Meanwhile, positioning protrusions 8 are provided on both sides of the insertion part 4, and positioning grooves 9 are provided on the inner sidewall of the rectangular groove 3. The positioning protrusions 8 and positioning grooves 9 cooperate to achieve precise assembly guidance and prevent misalignment. After the protrusions 8 are embedded in the grooves 9, on the one hand, they guide the crossbar 2 to be inserted into the column 1 at a preset angle to avoid local stress concentration caused by skewness; on the other hand, they provide a temporary locking position before locking to prevent the crossbar 2 from slipping off during construction, and at the same time limit the horizontal torsion of the crossbar 2 during use.

[0036] The side of the column 1 has a through hole 11, the axis of which is orthogonal to the opening direction of the rectangular groove 3. The through hole 11 is a right trapezoid and is interference-fitted with the locking strip 6. By embedding the locking strip 6 into the through hole 11 and then into the wedge groove 5 of the insertion part 4, the crossbar 2 is limited on the column 1, which provides a through-type rigid anchor: the locking strip 6 is embedded into the through hole 11 from one side of the column 1 and inserted into the wedge groove 5, forming a "bolt-type lock" that penetrates the column 1. The interference fit ensures that the locking strip 6 is in close contact with the inner wall of the through hole 11 around the entire circumference, distributing the load to the entire cross section of the column 1, greatly improving the shear strength of the joint, and is suitable for high-load scenarios. Furthermore, the interference fit between the locking strip 6 and the wedge groove 5 allows for forced pressing of the locking strip 6 during assembly, using the elastic deformation of the wood to generate a continuous radial clamping force, compensating for wood shrinkage or wear during use, maintaining a long-term locking effect, and is especially suitable for outdoor environments with frequent temperature and humidity changes.

[0037] It is worth noting that the inclined surface of the wedge groove 5 is located on the side close to the inside of the rectangular groove 3. This design optimizes the direction of the self-locking force: when the locking bar 6 is inserted, the inclined surface presses the insertion part 4 inward, forcing the end of the crossbar 2 to press more tightly against the inner wall of the rectangular groove 3, preventing the crossbar 2 from shifting outward when subjected to external force, and reducing the probability of the locking bar 6 accidentally coming out.

[0038] Meanwhile, the locking strip 6 is made of wood, achieving material performance matching: the wooden locking strip 6 has a similar coefficient of thermal expansion to the wooden uprights 1 / crossbars 2, avoiding internal stress caused by temperature changes; at the same time, the wood's non-rusting properties are consistent with the main structure, ensuring synchronized weather resistance throughout the entire life cycle and eliminating the risk of electrochemical corrosion.

[0039] The working principle of this device is as follows:

[0040] The insertion part 4 (with wedge-shaped groove 5) at the end of the crossbar 2 is vertically inserted into the rectangular groove 3 on the side of the column 1. At this time, the positioning protrusions 8 on both sides of the insertion part 4 are precisely engaged with the positioning grooves 9 on the inner wall of the rectangular groove 3, ensuring that the crossbar 2 and the column 1 are aligned at a preset angle to avoid assembly misalignment; at the same time, it can prevent the crossbar 2 from accidentally slipping out before locking and provide a stable foundation for subsequent locking operations;

[0041] Then, the inclined surface of the wooden wedge-shaped locking strip 6 is inserted downward into the wedge-shaped groove 5 of the insertion part 4 (the insertion method is that the locking strip 6 penetrates the column 1 laterally and fits into the right-angled trapezoidal through hole 11 with an interference fit, distributing the load to the entire cross section of the column 1 to form a shear-resistant "bolt"). Since the inclined surface of the wedge-shaped groove 5 is located on the inside, the locking force is directed towards the center of the column 1, inhibiting the crossbar 2 from shifting outward when subjected to external force, forcing the insertion part 4 to expand inward and tightly press against the inner wall of the rectangular groove 3, forming a strong lateral compressive force; when the crossbar 2 is subjected to an upward pull-out force, the inclined surface structure is used to distribute the force to prevent the crossbar 2 from shifting outward when subjected to external force, while reducing the probability of the locking strip 6 accidentally coming out; the locking strip 6 and the wedge-shaped groove 5 adopt an interference fit, using the elastic deformation of the wood to generate a continuous clamping force to compensate for wear or shrinkage during use;

[0042] At the same time, the all-wood structure can eliminate the risk of metal corrosion and electrochemical corrosion, ensuring long-term environmental adaptability. Example

[0043] Please see Figure 4 and Figure 5 The bottom of the rectangular groove 3 is provided with evenly distributed drainage grooves 10. When rainwater seeps into the groove along the gap between the horizontal bar 2 and the column 1, the drainage grooves 10 form a flow channel to prevent liquid from stagnating on the contact surface between the insertion part 4 and the bottom of the groove, thereby fundamentally reducing the expansion, mold or structural weakening of wood caused by long-term water immersion.

[0044] Furthermore, the drainage trough 10 is an inclined trough, with the higher side located inside the rectangular trough 3 and the lower side located at the opening of the rectangular trough 3. The drainage trough 10 is designed as an inclined trough structure with a higher inner side and a lower opening, achieving gravity-directed drainage: water naturally flows from the depth of the trough to the outside of the opening under the action of gravity, efficiently draining accumulated water. This design is particularly suitable for dynamic rainwater infiltration scenarios outdoors, preventing backflow.

[0045] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functions and structural principles of the present invention have been shown and explained in the embodiments. Without departing from the principles, the implementation of the present invention may have any modifications or variations.

Claims

1. A railing device, comprising a post (1) and a crossbar (2); Its features are: The column (1) has a rectangular groove (3) on its side; The end of the crossbar (2) is provided with a plug-in part (4) that matches the rectangular groove (3), and the top of the plug-in part (4) has a wedge-shaped groove (5). It also includes a wedge-shaped locking strip (6), which has a right-angled trapezoidal cross section and is inserted into the wedge-shaped groove (5) with its inclined surface facing downwards, so as to lock the crossbar (2) onto the column (1).

2. The railing device according to claim 1, characterized in that: After the locking strip (6) is inserted into the wedge groove (5), its upper surface is pressed against the upper edge of the rectangular groove (3).

3. A railing device according to claim 2, characterized in that: The upper surface of the locking strip (6) is provided with anti-slip texture (7).

4. A railing device according to claim 1, characterized in that: The plug part (4) has positioning protrusions (8) on both sides, and the inner wall of the rectangular groove (3) has a corresponding positioning groove (9).

5. A railing device according to claim 1, characterized in that: The bottom of the rectangular trough (3) is provided with evenly distributed drainage troughs (10).

6. A railing device according to claim 5, characterized in that: The drainage trough (10) is an inclined trough, with the higher side located inside the rectangular trough (3) and the lower side located at the opening of the rectangular trough (3).

7. A railing device according to claim 2, characterized in that: The column (1) has a through hole (11) on its side. The axis of the through hole (11) is orthogonal to the opening direction of the rectangular groove (3). The through hole (11) is a right trapezoid and is interference-fitted with the locking strip (6). By embedding the locking strip (6) into the through hole (11), and then into the wedge groove (5) of the plug part (4), the crossbar (2) is limited on the column (1).

8. A railing device according to claim 1, characterized in that: The inclined surface of the wedge-shaped groove (5) is located on one side close to the interior of the rectangular groove (3).

9. A railing device according to claim 8, characterized in that: The locking strip (6) is interference-fitted with the wedge groove (5).

10. A railing device according to claim 1, characterized in that: The locking strip (6) is made of wood.

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