Automatic closing device for fireproof door

Abstract

The utility model relates to an automatic closing device for a fireproof door, which comprises a sliding part which keeps sliding relative to a door frame, a pull rod is arranged between the sliding part and a door body, and the sliding part is provided with an insertion end; and the limiting ring is arranged on the door body, and when the sliding part slides on one side, the insertion end extends into the limiting ring. The structure of the sliding part can be used for driving the door body in the closing process, in the door body closing process, the movement of the door body can be limited by enabling the insertion end to stretch into the limiting ring, and therefore the door body is kept in the closed state, compared with the prior art, the locking process is not affected by high temperature, and the locking effect is good. Therefore, the safety is better.

Description

Technical Field

[0001] The utility model belongs to the technical field of building fire-fighting equipment, in particular to an automatic closing device for a fire door. Background Art

[0002] Fire doors are used to isolate interior spaces from fires, preventing them from spreading. Therefore, they must maintain a secure lock during fires. Currently, some fire door locks utilize magnetic locking mechanisms. Exposure to high temperatures can cause the permanent magnets to demagnetize, leading to a loss of locking effectiveness in fires and potentially posing a safety hazard. Utility Model Content

[0003] The purpose of this section is to summarize some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and in the abstract and title of the utility model to avoid obscuring the purpose of this section, the abstract and the title of the utility model, and such simplifications or omissions shall not be used to limit the scope of the present invention.

[0004] In view of the following technical problems in the prior art: in the current door lock structure, the magnetic attraction part easily loses its magnetism at high temperatures, thereby losing the locking effect on the door body. To solve this technical problem, the present utility model provides the following technical solutions:

[0005] An automatic closing device for a fire door, comprising:

[0006] A sliding portion that is arranged to slide relative to the door frame, a pull rod is arranged between the sliding portion and the door body, and the sliding portion has an insertion end;

[0007] A limiting ring is provided on the door body, and when the sliding portion slides to one side, the insertion end extends into the limiting ring.

[0008] As a preferred technical solution for an automatic closing device for a fire door, the sliding part includes a first part and a second part, the first part and the second part are movably connected, the first part is connected to the pull rod, the second part is configured with a driving force, and the insertion end is located on the second part.

[0009] As a preferred technical solution for an automatic closing device for a fire door, the first part and the second part are connected via a spring assembly.

[0010] As a preferred technical solution for the automatic closing device of a fire door, it also includes a driving rod that is arranged to rotate relative to the door frame and is threadedly engaged with the second part.

[0011] As a preferred technical solution for the automatic closing device of a fire door, it also includes a fixing part, the driving rod is rotatably arranged on the fixing part, and the first part and the second part are both slidably matched with the fixing part.

[0012] As a preferred technical solution for an automatic closing device for a fire door, the fixing portion includes a first area and a second area, the first part and the second part are arranged in the first area, and the driving rod is arranged in the second area.

[0013] The automatic closing device for fire doors provided by the present invention has the beneficial effects that the sliding portion can be used to drive the door body to close. When the door body is closed, the movement of the door body can be restricted by extending the insertion end into the limit ring, thereby keeping the door body in a tightly closed state. Compared with the existing technology, the locking process is not affected by high temperature, thereby having better safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without inventive work. Among them:

[0015] Figure 1 This is an assembly diagram of the present utility model.

[0016] Figure 2 For about Figure 1 A separate display diagram of the local structure.

[0017] Figure 3 For about Figure 1 Front view of the local position.

[0018] Figure numerals: 1. sliding part; 101. insertion end; 102. first part; 103. second part; 104. spring assembly; 2. pull rod; 3. limiting ring; 4. driving rod; 5. fixing part; 501. first area; 502. second area; 6. driving motor. DETAILED DESCRIPTION

[0019] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below with reference to the accompanying drawings.

[0020] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0021] Secondly, the term "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in various places throughout this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0022] Furthermore, the present invention is described in detail with reference to schematic diagrams. For ease of illustration, when describing embodiments of the present invention, cross-sectional views of device structures may be partially enlarged and not to scale. Furthermore, the schematic diagrams are merely illustrative and should not limit the scope of protection of the present invention. Furthermore, in actual production, three-dimensional dimensions, including length, width, and depth, should be included.

[0023] Reference Figure 1-3 One embodiment of the present invention provides an automatic closing device for a fire door, comprising the following parts:

[0024] A sliding portion 1 is provided to slide relative to the door frame, with the sliding direction being horizontal. A pull rod 2 is movably connected between the sliding portion 1 and the door body. A driving force is provided on the sliding portion 1, and the door body can be opened and closed during the movement of the sliding portion 1. The sliding portion 1 also has an insertion end 101;

[0025] A limiting ring 3 is provided on the door body. When the sliding portion 1 slides to one side to close the door body, the insertion end 101 is inserted into the limiting ring 3, thereby achieving a limiting effect on the door body.

[0026] In the present invention, one device corresponds to one door body, such as Figure 1 As shown in the figure, the left door shows the state of the device when it is open, and the right door shows the state of the device when it is closed. Figure 3 Middle pair Figure 1A separate plane display is provided on the top of the door leaf on the right side. Specifically, when the sliding part 1 slides to a position close to the door leaf axis, the door leaf is kept in an open state by the pull rod 2. When the sliding part 1 moves to a position away from the door leaf axis, the door leaf is kept in a closed state by the pull rod 2. At this time, the insertion end 101 on the sliding part 1 also synchronously extends into the limit ring 3 to limit the movement of the door leaf. Compared with the existing technology, this limiting structure is not easily affected by high temperature. Therefore, even when there is an external force to push the door leaf, the door leaf will always be in a locked state. This state can provide good safety protection in a fire.

[0027] Further, refer to Figure 2 and Figure 3 The sliding portion 1 includes a first portion 102 and a second portion 103, and the first portion 102 and the second portion 103 are movably connected. Specifically, the distance between the first portion 102 and the second portion 103 can be limitedly compressed or limitedly stretched, and there is an elastic relationship between the two. The first portion 102 is connected to the pull rod 2, and the second portion 103 is configured with a driving force. The insertion end 101 is specifically arranged on the second portion 103; when the second portion 103 moves toward the side close to the door shaft, it moves synchronously toward the side of the first portion 102, so that the second portion 1 03 and the first part 102 is compressed to a minimum, and finally the first part 102 is pushed to move to realize the opening of the door leaf. When the second part 103 moves toward the side away from the door leaf axis, it synchronously moves away from the first part 102, and finally pulls the first part 102 to move to realize the closing of the door leaf. Through the active relationship, when the door leaf is closed in place and the first part 102 can no longer move, the second part 103 can still move a certain distance relative to the first part 102. At this time, the second part 103 drives the insertion end 101 to extend into the limit ring 3 to achieve the locking and limiting effect of the door leaf.

[0028] Further, refer to Figure 2 and Figure 3 Regarding the movable connection setting between the first part 102 and the second part 103, the two can be connected by a spring component 104, which has a simple structure and is easy to implement.

[0029] Further, refer to Figure 2 and Figure 3 Regarding the configuration of the driving force on the second part 103, the utility model also includes a driving rod 4 that is arranged to rotate relative to the door frame. There is a threaded fitting relationship between the driving rod 4 and the second part 103. When the driving rod 4 rotates, the movement of the second part 103 can be achieved through threaded fitting. It also includes a power element acting on the driving rod 4. The power element can be a driving motor 6, which is connected to the driving rod 4.

[0030] Further, refer to Figure 1-3 Regarding the assembly of the entire device, the utility model also includes a fixing part 5, the driving rod 4 is rotatably set on the fixing part 5, the first part 102 and the second part 103 are both slidably matched with the fixing part 5, when installing the entire device, the fixing part 5 can be assembled on the door frame.

[0031] Further, refer to Figure 1-3 Regarding the shape of the fixing portion 5, the fixing portion 5 can be set to a shell-like structure, and its interior includes a first area 501 and a second area 502, the first area 501 and the second area 502 are separated, and the sliding portion 1 composed of the first part 102 and the second part 103 is set in the first area 501, and the first part 102 and the second part 103 are both in sliding cooperation with the inner wall of the first area 501, and the driving rod 4 is set in the second area 502. This layout is conducive to the assembly of the entire device during production, and at the same time ensures that the various components do not interfere with each other during movement.

[0032] It will be appreciated that in the development of any actual embodiment, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will, for those of ordinary skill having the benefit of this disclosure, be a routine undertaking of design, fabrication, and production without undue experimentation.

[0033] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, and all of these should be included in the scope of the claims of the present invention.

Claims

1. An automatic closing device for a fire door, characterized in that: include: A sliding portion (1) is arranged to slide relative to the door frame, a pull rod (2) is arranged between the sliding portion (1) and the door body, and an insertion end (101) is provided on the sliding portion (1); A limiting ring (3) is provided on the door body, and when the sliding portion (1) slides to one side, the insertion end (101) extends into the limiting ring (3).

2. The automatic closing device for a fire door according to claim 1, characterized in that: The sliding portion (1) includes a first portion (102) and a second portion (103), the first portion (102) and the second portion (103) are movably connected, the first portion (102) is connected to the pull rod (2), the second portion (103) is configured with a driving force, and the insertion end (101) is located on the second portion (103).

3. The automatic closing device for a fire door according to claim 2, characterized in that: The first part (102) and the second part (103) are connected via a spring assembly (104).

4. The automatic closing device for a fire door according to claim 2, characterized in that: It also includes a driving rod (4) that is arranged to rotate relative to the door frame and is threadedly engaged with the second part (103).

5. The automatic closing device for a fire door according to claim 4, characterized in that: It also includes a fixing portion (5), the driving rod (4) is rotatably arranged on the fixing portion (5), and the first portion (102) and the second portion (103) are both slidably matched with the fixing portion (5).

6. The automatic closing device for a fire door according to claim 5, characterized in that: The fixing portion (5) comprises a first area (501) and a second area (502), the first part (102) and the second part (103) are arranged in the first area (501), and the driving rod (4) is arranged in the second area (502).

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