Self-closing safety door hinge
By incorporating the inclined surface of the safety door hinge and the design of the top support spring, the automatic closing and tight sealing of the safety door is achieved, solving the problem of incomplete manual closing in existing technologies and improving safety and durability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHINA MCC20 GRP CORP LTD
- Filing Date
- 2025-06-18
- Publication Date
- 2026-07-03
AI Technical Summary
Existing security doors require manual closing and are prone to not closing properly; there is a lack of automatic closing devices that are durable.
Design a safety door hinge that uses a combination of an inclined plane and a top support spring to enable the safety door to automatically close and remain tightly closed under the action of gravity. Through the gravity of the safety door and the guidance of the inclined plane, the safety door gradually rises during the opening process and gradually falls during the closing process, and the elastic force of the top support spring keeps it in the closed state.
It enables automatic closing and tight sealing of safety doors, preventing unauthorized personnel from entering dangerous areas, improving production safety, and features a simple and durable structure.
Smart Images
Figure CN224452546U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of mechanical technology, and specifically to a safety door hinge that can close automatically. Background Technology
[0002] In industrial production units, many staircases and equipment platforms are equipped with safety railings and safety doors for production safety. Traditionally, safety doors are connected by two steel pipes connected by a round steel bar in the middle, using the rotation of the round steel bar to open and close. However, this type of safety door often fails to close properly, and requires manual closing after each entry, which is inconvenient. To solve this problem, current technology often uses springs and wires to tighten the steel bar and ensure the safety door closes.
[0003] There is a lack of an automatic safety door closing device that can automatically close the safety door without requiring additional operation, has a long service life, and is not easily damaged. Utility Model Content
[0004] The purpose of this application is to solve the problem that safety gates in existing safety railings require manual closing each time someone enters or exits, and are prone to not closing properly. Therefore, this utility model provides an automatically closing safety gate shaft that can automatically close the safety gate through the weight of the safety gate and the guidance of the inclined surface; and after the safety gate is fully closed, it has a tendency to continue to close tightly, always keeping the safety gate in a closed state, preventing unauthorized personnel from entering the hazardous production area, and improving safety.
[0005] To achieve the above objectives, in a first aspect, this utility model provides an automatically closing safety door hinge, wherein one side of the safety door is rotatably mounted on the railing via the safety door hinge, and when the safety door is closed, the other side of the safety door is supported against the safety door stop, wherein the safety door hinge includes an upper sleeve fixed to the safety door and a lower sleeve fixed to the safety door frame;
[0006] The lower bottom surface of the upper sleeve is an inclined first slope, and the lowest point of the first slope is point A;
[0007] A round steel bar is placed inside the upper sleeve, with the lower part of the round steel bar extending out of the upper sleeve and into the lower sleeve, and the lower end extending out of the lower sleeve. A support spring is provided between the lower end of the lower sleeve and the round steel bar.
[0008] The upper surface of the lower sleeve is a second inclined plane with the same slope as the first inclined plane, and the lowest point of the second inclined plane is point B;
[0009] When the safety door is closed, the horizontal position of point B is obtained by rotating point A by an angle greater than 0° and less than 90° in the direction in which the safety door is closed.
[0010] Using the above scheme, the inclined plane can guide the safety door to gradually rise during opening and gradually descend during closing. Since the horizontal position of point B is obtained by rotating point A by 0-90° in the direction of closing the safety door, when the safety door is closed (the other end of the safety door does not have a safety door hinge or other safety door stop structure; when the safety door rotates around the safety door hinge and the other end of the safety door has a safety door stop structure, it is considered to be in the closed state), the lowest point A of the upper sleeve has not yet coincided with the lowest point B of the lower sleeve. The upper sleeve also has a tendency to descend and rotate, which can give the safety door a force in the closing direction to maintain the closure of the safety door.
[0011] On the other hand, since the round steel bar is fixed to the upper sleeve, the upper sleeve is located above the lower sleeve, and the lower end of the round steel bar extends below the lower sleeve, a support spring is installed between the lower end of the round steel bar and the lower sleeve. This causes the round steel bar to be subjected to a downward spring force, which in turn causes the upper sleeve to be subjected to a downward force. Because the upper sleeve is located on the lower sleeve, the spring...
[0012] Under the supporting force of the spring, the upper sleeve has a greater force pressing on the lower sleeve. Since the contact surface between the upper and lower sleeves is inclined, this force can make the upper sleeve rotate faster, and the safety door can close faster. Moreover, after the safety door is closed, a greater force is needed to make the upper sleeve rise, and a greater force is needed to make the safety door rotate and open, so that it closes more tightly.
[0013] In some embodiments, the outer side of the upper sleeve is welded to the safety door, and point A is located at the welding position between the upper sleeve and the safety door.
[0014] With the above implementation scheme, there are more welding points between the upper sleeve and the safety door, resulting in a more secure connection.
[0015] In some embodiments, an upper stop block is provided at the upper end of the round steel bar, the size of which is larger than the inner diameter of the upper sleeve, and the round steel bar is secured in the upper sleeve by the upper stop block.
[0016] Using the above implementation scheme, the round steel can be quickly placed inside the upper sleeve by means of the upper stop block.
[0017] In some embodiments, a lower stop block is provided at the lower end of the round steel bar, the lower stop block supports the top support spring, and the top support spring is located between the lower stop block and the bottom surface of the lower sleeve.
[0018] Using the above implementation scheme, the spring can be more easily fixed by the lower stop.
[0019] In some embodiments, the lower end of the round steel bar is provided with threads, the lower stop block is nut-shaped, and the lower stop block is threadedly connected to the round steel bar.
[0020] By using the above implementation scheme, the lower stop block is threadedly connected to the round steel, which can quickly realize the installation of the entire safety door shaft. During installation, the lower end of the round steel is inserted from the top of the lower sleeve to the bottom of the lower sleeve; then the top support spring is put on the round steel, and the lower stop block is put on it to complete the spring fixing.
[0021] In some embodiments, the upper end of the round steel bar is welded to the upper sleeve.
[0022] The above-described implementation scheme, through welding, results in a tighter connection, making it more suitable for the complex and hazardous environments of industrial production units.
[0023] In some embodiments, the outer diameter of the steel pipe is 22 mm, and the outer diameter of the round steel is 10 mm.
[0024] The above implementation scheme, with its suitable dimensions, ensures that opening the safety door is not too strenuous and that closing the safety door is also possible.
[0025] In some embodiments, metal washers are provided at both the upper and lower ends of the support spring.
[0026] The metal sheet reduces friction between the spring and the lower sleeve, as well as between the spring and the round steel, facilitating the opening and closing of the safety door.
[0027] In summary, this application achieves automatic closing of the safety door by shifting the positions of points A and B and using the supporting force of the top spring. Even after closing, a tight closing force remains, which automatically closes the safety door when personnel enter or exit, preventing unauthorized personnel from accidentally entering the dangerous area of the production unit and preventing accidents from occurring, thereby improving safety. Attached Figure Description
[0028] The present invention, its features, shape, and advantages will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings. Like reference numerals denote like parts throughout the drawings. The drawings are not drawn to scale; their purpose is to illustrate the gist of the invention.
[0029] Figure 1 This is a front view of the automatically closing safety door hinge installed between the railing and the safety door in an embodiment of this utility model;
[0030] Figure 2 This is a detailed view of the safety door shaft in the closed state of the safety door in this embodiment of the present invention;
[0031] Figure 3This is a front view of the safety door shaft after disassembly of its upper and lower parts in the closed state, according to an embodiment of this utility model.
[0032] Figure 4 This is a top view of the safety door shaft after the upper and lower parts have been separated in the closed state of the safety door in this embodiment of the present invention.
[0033] Explanation of reference numerals in the attached figures:
[0034] 1. Safety door frame; 11. Safety door stop; 2. Safety door; 31. Upper sleeve; 41. Lower sleeve; 5. Round steel; 51. Upper stop block; 52. Lower stop block; 6. Top support spring; 7. Metal gasket. Detailed Implementation
[0035] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0036] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first," "second," "third," etc., may explicitly or implicitly include one or more of that feature. In addition, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "joined" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two elements. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0037] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.
[0038] Example
[0039] Please see Figure 1-4This embodiment provides an automatically closing safety door hinge. One side of the safety door 2 is rotatably mounted on the railing via the safety door hinge. When the safety door is closed, the other side of the safety door 2 is supported on the safety door stop 11. It includes an upper sleeve 31 fixed to the safety door 2 and a lower sleeve 41 fixed to the safety door frame 1.
[0040] The bottom surface of the upper sleeve 31 is an inclined first slope, and the lowest point of the first slope is point A;
[0041] A round steel bar 5 is placed inside the upper sleeve 31, and the lower part of the round steel bar 5 extends out of the upper sleeve 31 and into the lower sleeve 41, with the lower end extending out of the lower sleeve 41. A top support spring 6 is provided between the lower end of the lower sleeve 41 and the round steel bar 5.
[0042] The upper surface of the lower sleeve 41 is a second inclined plane with the same slope as the first inclined plane, and the lowest point of the second inclined plane is point B;
[0043] When safety door 2 is closed, the horizontal position of point B is obtained by rotating point A by an angle greater than 0° and less than 90° in the direction in which safety door 2 is closed.
[0044] There is a lack of stable and low-cost automatic safety door closing devices in the current technology.
[0045] In the embodiments disclosed in this application, during the opening of the safety door, point A of the upper sleeve 31 gradually moves away from point B of the lower sleeve 41. Since the contact surface between the upper sleeve 31 and the lower sleeve 41 is an inclined plane, the upper sleeve 31 gradually rises during the opening of the safety door, and the safety door 2 also rises accordingly, storing gravitational potential energy. After the personnel pass through, the safety door 2 will descend under the action of gravity. Guided by the inclined plane, the upper sleeve 31 will rotate and descend until the other end of the safety door 2 is completely closed. In some embodiments, the other end of the safety door 2 is blocked by the safety door stop 11. After the safety door 2 is closed, due to the obstruction of the safety door stop 11, point A does not coincide with point B, so there is always a rotational force, which enables the safety door 2 to close tightly.
[0046] It should be noted that the round steel 5 and the upper sleeve 31 can be either rotatably connected or fixedly connected. The function of the round steel 5 is to restrict the upper sleeve 31 from moving in the horizontal direction, as long as the round steel 5 does not fall out of the upper sleeve 31.
[0047] Specifically, the corners of the security door are rounded, and the radius of the rounded corners meets the requirements of national standards.
[0048] In some embodiments, the length of the safety door is less than the space between the safety door frame and the safety door stop. A baffle is provided on the side of the safety door near the safety door stop. When the safety door is closed, the baffle abuts against the safety door stop, preventing the safety door from continuing to rotate.
[0049] Specifically, the outer side of the upper sleeve 31 is welded and fixed to the safety door 2, and point A is located at the welding position between the upper sleeve 31 and the safety door 2.
[0050] Specifically, the upper end of the round steel 5 is provided with an upper stop block 51. The size of the upper stop block 51 is larger than the inner diameter of the upper sleeve 31. The round steel 5 is clamped in the upper sleeve 31 by the upper stop block 51.
[0051] Specifically, a lower stop block 52 is provided at the lower part of the round steel 5, and the lower stop block 52 supports the top support spring 6. The top support spring 6 is located between the lower stop block 52 and the bottom surface of the lower sleeve 41.
[0052] Specifically, the lower part of the round steel 5 is threaded, and the lower stop block 52 is nut-shaped. The lower stop block 52 is threadedly connected to the round steel 5. During installation, the round steel 5 can be inserted into the lower sleeve 41 first, and the lower stop block 52 can be screwed onto the lower end of the round steel 5 to complete the quick installation of the safety door shaft.
[0053] Specifically, the upper end of the round steel 5 is welded to the upper sleeve 31.
[0054] Specifically, both the upper sleeve 31 and the lower sleeve 41 are steel pipes. Preferably, the outer diameter of the steel pipe is 22mm, and its inner diameter is larger than the outer diameter of the round steel 5, which has an outer diameter of 10mm.
[0055] Specifically, metal washers 7 are provided at both the upper and lower ends of the top support spring 6.
[0056] Those skilled in the art should understand that variations can be implemented by combining existing technology with the above embodiments, which will not be elaborated here. Such variations do not affect the substantive content of this utility model, and will not be elaborated here.
[0057] The preferred embodiments of this utility model have been described above. It should be understood that this utility model is not limited to the specific embodiments described above. Devices and structures not described in detail herein should be understood as being implemented in a conventional manner within the art. Any person skilled in the art can make many possible variations and modifications to the technical solutions of this utility model using the disclosed methods and techniques, or modify them into equivalent embodiments with equivalent changes, without departing from the scope of the technical solution of this utility model. This does not affect the essential content of this utility model. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model, without departing from the content of the technical solution of this utility model, still fall within the protection scope of the technical solution of this utility model.
Claims
1. An automatically closable safety door shaft, one side of the safety door (2) is arranged on the railing (1) by the safety door shaft, and the other side of the safety door (2) is supported on the safety door stop (11) in the closed state of the safety door, characterized in that, The safety door shaft includes an upper sleeve (31) fixed to the safety door (2) and a lower sleeve (41) fixed to the safety door frame (1). The bottom surface of the upper sleeve (31) is an inclined first slope, and the lowest point of the first slope is point A; A round steel bar (5) is placed inside the upper sleeve (31), and the lower part of the round steel bar (5) extends out of the upper sleeve (31) and into the lower sleeve (41), with the lower end extending out of the lower sleeve (41). A top support spring (6) is provided between the lower end of the lower sleeve (41) and the round steel bar (5). The upper surface of the lower sleeve (41) is a second inclined plane with the same slope as the first inclined plane, and the lowest point of the second inclined plane is point B; When the safety door (2) is closed, the horizontal position of point B is obtained by rotating point A by an angle greater than 0° and less than 90° in the direction in which the safety door (2) is closed.
2. The automatically closing safety door hinge according to claim 1, characterized in that, The outer side of the upper sleeve (31) is welded and fixed to the safety door (2), and point A is located at the welding position between the upper sleeve (31) and the safety door (2).
3. The automatically closing safety door hinge according to claim 1, characterized in that, The upper end of the round steel (5) is provided with an upper stop block (51). The size of the upper stop block (51) is larger than the inner diameter of the upper sleeve (31). The round steel (5) is clamped in the upper sleeve (31) by the upper stop block (51).
4. The automatically closing safety door hinge according to claim 1, characterized in that, The lower end of the round steel (5) is provided with a lower stop block (52), which supports the top support spring (6). The top support spring (6) is located between the lower stop block (52) and the bottom surface of the lower sleeve (41).
5. The automatically closing safety door hinge according to claim 4, characterized in that, The lower end of the round steel (5) is provided with threads, the lower stop block (52) is nut-shaped, and the lower stop block (52) is threadedly connected to the round steel (5).
6. The automatically closing safety door hinge according to claim 1, characterized in that, The upper end of the round steel (5) is welded to the upper sleeve (31).
7. The automatically closing safety door hinge according to claim 1, characterized in that, The outer diameter of the steel pipe is 22mm, and the outer diameter of the round steel (5) is 10mm.
8. The automatically closing safety door hinge according to claim 1, characterized in that, The top support spring (6) is provided with metal washers (7) at both the upper and lower ends.