Steel fireproof door convenient to install

Abstract

The utility model discloses a steel fireproof door convenient to install, which comprises a rectangular fixed door frame, a door body is arranged in the door frame, a plurality of first hinges are installed on the left side wall in the door frame through bolts, the plurality of first hinges are longitudinally arranged, and first fixed blocks protruding out of the door frame are arranged at the lower ends of the front sides of the first hinges. Second hinges matched with the first hinges are installed at the positions, corresponding to the first hinges, of the left side of the front side face of the door body through bolts, second fixing blocks protruding out of the door body are arranged at the upper ends of the front sides of the second hinges, rotating shafts are perpendicularly arranged on the lower sides of the second fixing blocks, and through holes allowing the first fixing blocks to be inserted are formed in the positions, corresponding to the rotating shafts, of the upper side faces of the first fixing blocks. A rotating piece for assisting the rotating shaft to rotate is arranged in the through hole; the door body is manually lifted to the through hole corresponding to the rotating shaft, the door body is put down, the rotating shaft is inserted into the through hole, rapid installation can be completed, and meanwhile the rotating piece is arranged, so that the inserted rotating shaft can rotate conveniently.

Description

Technical Field

[0001] This utility model relates to the field of fire door technology, specifically to a steel fire door that is easy to install. Background Technology

[0002] Steel fire doors are fire doors made of steel. They are commonly used in densely populated buildings such as office buildings, shopping malls, and schools. They are usually installed in escape routes or fire exits. Through their special design and fire-resistant materials, they can effectively prevent the spread of fire and achieve the functions of heat insulation, isolation, and smoke isolation.

[0003] However, there are also some problems in using existing steel fire doors. For example, during the installation of existing steel fire doors, the door frame and the door body are fixed by a hinge that is swivelly connected. Therefore, after the door frame is installed, several workers are needed to hold the door body and then turn the screws to achieve the installation effect. This process requires a lot of manual labor, and the door body is very easy to move during the turning of the screws, which affects the installation effect. At the same time, during the subsequent disassembly, many people are also needed to hold the door body. The operation is complicated, time-consuming and labor-intensive. Utility Model Content

[0004] In view of the technical problems in the prior art, the present invention provides a steel fire door that is easy to install, and the purpose is to solve the above problems.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A steel fire door that is easy to install includes a rectangular fixed door frame, a door body inside the door frame, and multiple first hinges bolted to the left side wall of the door frame. The multiple first hinges are arranged longitudinally. The lower front end of the first hinges has a first fixing block protruding from the door frame. The left side of the front side of the door body has matching second hinges bolted to the multiple first hinges. The upper front end of the second hinges has a second fixing block protruding from the door body. The lower side of the second fixing block has a vertically arranged rotating shaft. The upper side of the first fixing block has a through hole for insertion into the rotating shaft. The through hole contains a rotating component to assist the rotation of the rotating shaft.

[0007] Preferably, the rotating component includes a rotating sleeve disposed in the through hole, the rotating sleeve being rotatably connected to the through hole, and the inner sidewall of the rotating sleeve having an insertion hole adapted to the rotating shaft.

[0008] Preferably, the rotating sleeve is a hollow cylindrical shape with openings at the top and bottom, and the upper and lower ends are respectively provided with limiting ring blocks that can be limited to the upper and lower sides of the through hole.

[0009] Preferably, an annular support block is provided on the outer wall of the rotating sleeve, and an annular groove is provided in the through hole corresponding to the annular support block. Multiple balls are arranged in annularly between the lower side of the annular support block and the lower side of the annular groove. Limiting annular grooves for rolling are provided on the lower side of the annular support block and the lower side of the annular groove corresponding to the multiple balls.

[0010] Preferably, the lower side of the first fixing block is provided with a threaded fixing rod that can be threadedly connected to the bottom of the rotating shaft at the corresponding through hole. When the threaded fixing rod is threadedly connected to the bottom of the rotating shaft, its head just abuts against the limiting ring block at the bottom of the rotating sleeve.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] This utility model provides a steel fire door that is easy to install. By using the rotating shaft of the second hinge to cooperate with the through hole of the first hinge, the door can be quickly installed. At the same time, a rotating sleeve is set in the through hole. During the opening and closing of the door, the rotating shaft is fixed in the rotating sleeve. The sleeve rotates within the through hole, reducing friction during the rotation of the rotating shaft and making the rotation smoother. In addition, a threaded fixing rod is provided at the bottom of the first hinge corresponding to the rotating shaft, so as to fix the rotating shaft in the rotating sleeve and ensure the stability of the rotating shaft within the rotating sleeve during rotation. Attached Figure Description

[0013] Figure 1 This is an overall schematic diagram of a steel fire door that is easy to install according to this utility model;

[0014] Figure 2 This is an enlarged view of the connection between the first hinge and the second hinge of a steel fire door that is easy to install according to this utility model;

[0015] Figure 3 This is an enlarged view of point A of a steel fire door that is easy to install according to this utility model;

[0016] Figure 4-5 This is a top view schematic diagram showing the connection and rotation of the first and second hinges of a steel fire door that is easy to install according to this utility model.

[0017] In the diagram: 1. Door frame; 2. Door body; 3. First hinge; 31. First fixing block; 32. Through hole; 33. Annular groove; 4. Second hinge; 41. Second fixing block; 42. Rotating shaft; 5. Rotating component; 51. Rotating sleeve; 52. Insertion hole; 53. Limiting ring block; 54. Annular support block; 55. Ball bearing; 56. Threaded fixing rod; 6. Limiting ring groove. Detailed Implementation

[0018] 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.

[0019] Please see Figure 1-5 This application proposes a steel fire door that is easy to install, including a rectangular fixed door frame 1, a door body 2 inside the door frame 1, and multiple first hinges 3 installed on the left side wall inside the door frame 1 by bolts. The multiple first hinges 3 are arranged longitudinally. A first fixing block 31 protruding from the door frame 1 is provided at the lower front end of the first hinge 3. A matching second hinge 4 is installed on the left side of the front side of the door body 2 corresponding to the multiple first hinges 3 by bolts. A second fixing block 41 protruding from the door body 2 is provided at the upper front end of the second hinge 4. A rotating shaft 42 is vertically provided on the lower side of the second fixing block 41. A through hole 32 for insertion is opened on the upper side of the first fixing block 31 corresponding to the rotating shaft 42. A rotating component 5 for assisting the rotation of the rotating shaft 42 is provided in the through hole 32.

[0020] Specifically, firstly, the first hinge 3 is installed on the inner left side wall of the door frame 1 with bolts. Then, the second hinge 4 is installed on the corresponding position on the door body 2. Then, the door body 2 is manually lifted to the corresponding through hole 32 of the rotating shaft 42. The door body 2 is then lowered and the rotating shaft 42 is inserted into the through hole 32 to complete the quick installation. At the same time, a rotating part 5 is set to facilitate the rotation of the rotating shaft 42 after insertion.

[0021] Further details can be found here. Figure 1-3 The rotating component 5 includes a rotating sleeve 51 disposed in the through hole 32. The rotating sleeve 51 is rotatably connected to the through hole 32. The inner side wall of the rotating sleeve 51 is provided with an insertion hole 52 that is adapted to the rotating shaft 42. The rotating sleeve 51 rotates in the through hole 32, thereby assisting the rotating rod to rotate. At the same time, the rotating sleeve 51 is a hollow cylindrical shape with openings at the top and bottom, and the upper and lower ends are respectively provided with limiting ring blocks 53 that can limit the rotating sleeve 51 to the upper and lower sides of the through hole 32, so as to ensure that the rotating sleeve 51 is limited in the through hole 32.

[0022] Further details can be found here. Figure 1-3 An annular support block 54 is provided on the outer wall of the rotating sleeve 51. An annular groove 33 is provided in the through hole 32 corresponding to the annular support block 54. Multiple balls 55 are arranged in annularly between the lower side of the annular support block 54 and the lower side of the annular groove 33. A limiting annular groove 6 is provided on the lower side of the annular support block 54 and the lower side of the annular groove 33 corresponding to the multiple balls 55 for them to roll. By setting multiple balls 55, the friction generated by rotation is greatly reduced and the service life is improved.

[0023] Meanwhile, a threaded fixing rod 56 is provided at the corresponding through hole 32 on the lower side of the first fixing block 31, which can be threadedly connected to the bottom of the rotating shaft 42. When the threaded fixing rod 56 is threadedly connected to the bottom of the rotating shaft 42, its head just abuts against the limiting ring block 53 at the bottom of the rotating sleeve 51, thereby fixing the rotating shaft 42 inserted into the rotating sleeve 51 on the rotating sleeve 51, so that the rotating shaft 42 is fixed inside the rotating sleeve 51, and the stability of the rotating shaft 42 inside the rotating sleeve 51 is ensured when rotating.

[0024] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0025] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing this utility model 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, and therefore should not be construed as a limitation of this utility model.

[0026] 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 steel fire door for easy installation, comprising a rectangular door frame (1) in which a door body (2) is arranged, characterized in that, The left side wall in the door frame (1) is provided with a plurality of first hinges (3) by bolt mounting, the plurality of first hinges (3) are arranged longitudinally, the front lower end of the first hinge (3) is provided with a first fixed block (31) protruding from the door frame (1), the left side of the front side of the door body (2) is provided with a second hinge (4) corresponding to the plurality of first hinges (3) and matched with the first hinges (3) by bolt mounting respectively, the front upper end of the second hinge (4) is provided with a second fixed block (41) protruding from the door body (2), the lower side of the second fixed block (41) is vertically provided with a rotating shaft (42), the upper side of the first fixed block (31) is provided with a through hole (32) for inserting the rotating shaft (42), and the through hole (32) is provided with a rotating part (5) for assisting the rotating shaft (42) to rotate.

2. The steel fire door of claim 1, wherein, The rotating part (5) comprises a rotating sleeve (51) arranged in the through hole (32), the rotating sleeve (51) is in rotating connection with the through hole (32), and the inner side wall of the rotating sleeve (51) is provided with an inserting hole (52) matched with the rotating shaft (42).

3. The steel fire door of claim 2, wherein, The rotating sleeve (51) is an upper and lower opening hollow cylinder, and the upper and lower ends are respectively provided with limiting ring blocks (53) which can be limited on the upper and lower sides of the through hole (32).

4. The steel fire door of claim 3, wherein, The outer side wall of the rotating sleeve (51) is provided with an annular support block (54), the through hole (32) is provided with an annular groove (33) corresponding to the annular support block (54), a plurality of rolling balls (55) are annularly arranged between the lower side of the annular support block (54) and the inner lower side of the annular groove (33), and the lower side of the annular support block (54) and the inner lower side of the annular groove (33) are provided with limiting ring grooves (6) corresponding to the plurality of rolling balls (55) for rolling.

5. The steel fire door of claim 3, wherein, The lower side of the first fixed block (31) is provided with a threaded fixing rod (56) which can be threadedly connected with the bottom of the rotating shaft (42) corresponding to the through hole (32), and when the threaded fixing rod (56) is threadedly connected with the bottom of the rotating shaft (42), the head portion thereof abuts on the limiting ring block (53) at the bottom of the rotating sleeve (51).

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