Steel first-grade fireproof door convenient to disassemble and assemble

Abstract

The utility model relates to a steel first-grade fireproof door convenient to disassemble and assemble, and belongs to the technical field of fireproof doors. The steel first-grade fireproof door convenient to disassemble and assemble comprises a hanging piece, a meshing hanging piece, a shaft sleeve, a ratchet wheel assembly, a door plate, a door shaft and an installation groove, the meshing hanging piece is fixedly installed in the hanging piece, the shaft sleeve is fixedly installed on the meshing hanging piece and coaxially arranged on the outer side of the door shaft, the ratchet wheel assembly is coaxially arranged in the shaft sleeve, and the installation groove is formed in one side of the door plate. And the door shaft is arranged in the mounting groove. According to the utility model, a modularized installation design is adopted and is different from a traditional connecting and fixing mode, so that on the basis of ensuring an original safety strategy, more rapid and efficient installation and disassembly are ensured, manpower and material resources are saved, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of fire doors, in particular to a steel Class A fire door which is easy to assemble and disassemble. Background Art

[0002] A fire door is a door that can meet the requirements of fire resistance stability, integrity and thermal insulation within a certain period of time. It is a fire-resistant partition with a certain fire resistance installed between fire compartments, evacuation stairwells, vertical shafts, etc.

[0003] Existing fire doors are typically attached to the doorframe via hinges, which are connected by bolts and nuts. This makes it difficult for staff to disassemble and replace the fire door and doorframe. Furthermore, after prolonged use, the bolts and nuts become less than smooth, resulting in the fire door opening and closing being less smooth. Fire doors should be regularly inspected and maintained to ensure proper opening and closing. Damaged or aged fire doors should be promptly replaced or repaired.

[0004] The utility model patent with announcement number CN219691417U proposes a Class A fire door that is easy to install. It includes an installation frame and a door body. The door body is located on the inside of the installation frame, and an installation assembly is provided between the door body and the installation frame. The installation assembly includes a rotating sleeve, a connecting sleeve, key teeth, an insert shaft, a connecting ring, a fixed shaft and a spring. Two rotating sleeves are installed at both ends of the inner side of the installation frame. A connecting sleeve is provided between the two rotating sleeves. The connecting sleeve is connected to the door body. Key teeth are provided on the inner side of the connecting sleeve, and an insert shaft is slidably provided at both ends of the connecting sleeve. The utility model provides an installation assembly between the door body and the installation frame. During installation, by pressing the insert shaft, it drives the connecting ring to squeeze the spring, thereby retracting it into the connecting sleeve. The connecting sleeve is then inserted between the two rotating sleeves. Under the action of the tension of the spring, the insert shafts at both ends are driven to be inserted into the rotating sleeve, thus completing the installation of the door body. The overall installation method is simple and practical.

[0005] Although the above-mentioned utility model solves the problem of simple installation, it still has certain defects. The spring serves as the power of the plug-in shaft. Long-term use will cause the spring to deform, causing the door to get stuck, which will pose certain safety hazards and will also make it impossible to remove the fire door normally during disassembly.

[0006] In response to the above-mentioned problems that still exist, the present application proposes a steel Class A fire door that is easy to disassemble and assemble. Utility Model Content

[0007] In order to overcome the defects of the prior art, the utility model provides a steel Class A fire door that is easy to disassemble and assemble.

[0008] The utility model is realized through the following technical solutions: a steel Class A fireproof door which is easy to disassemble and assemble, comprising: a hanging part, an engaging hanging part, a shaft sleeve, a ratchet assembly, a door panel, a door shaft, and a mounting groove.

[0009] An engaging hanger is fixedly installed in the hanging part, and a shaft sleeve is fixedly installed on the engaging hanger. The shaft sleeve is coaxially arranged on the outside of the door shaft, and a ratchet assembly is coaxially arranged inside the shaft sleeve. A mounting groove is opened on one side of the door panel, and the door shaft is arranged inside the mounting groove.

[0010] The above-mentioned splicing connection method, also known as the modular connection method, makes the installation, replacement and disassembly operations of the fire door during use more convenient and quick, saving both time and labor costs.

[0011] Furthermore, the engaging hanger is engaged with the fixing plate, and the fixing plate is fixedly connected to the inner side of the door frame.

[0012] Furthermore, the hanging member also includes a latch rod, the latch rod pin is connected to one side of the engaging hanger, and one end of the latch rod is fixedly connected to two gear teeth.

[0013] Furthermore, the gear teeth abut against the elastic sheet, and the elastic sheet is in a "V" shape.

[0014] Furthermore, a flat key on one side of the elastic sheet is connected to a seesaw, and the seesaw is abutted between two fixed shafts 2, one end of the seesaw is fixedly connected to a spring, and the other end of the spring is fixedly connected to a horn hook, and the horn hook is coaxially arranged with the fixed shaft, and the fixed shaft 1 is fixedly connected to the inside of the sleeve.

[0015] Furthermore, the elastic sheet is coaxially arranged with the second fixed shaft, and the second fixed shaft is fixedly connected to the inside of the shaft sleeve.

[0016] Furthermore, the ratchet assembly also includes: a ratchet, a curved block, and a push block. The horn hook is engaged with the ratchet, and the ratchet is fixedly connected to one end of the curved block, and the push block is fixedly connected to the connection between the ratchet and the curved block.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] When the latch is pulled, the spring drives the spring-loaded member to rotate around the fixed axis 3, so that the spring is pulled back and forth, and the latch is locked. When the latch is pulled, the spring drives the spring-loaded member to rotate around the fixed axis 1, and the fixed axis 2 is locked. When the latch is pulled, the spring drives the spring-loaded member to rotate around the fixed axis 3, so that the spring is locked. When the latch is pulled, the spring drives the spring-loaded member to rotate around the fixed axis 3, so that the spring is locked. When the fire door is opened, the door shaft slides outward from the mounting slot, moving the hanger away from the door panel. The fire door is then rotated, causing the door shaft to rotate coaxially with the sleeve, driving the fire door open. This modular design, unlike traditional connection and fixing methods, ensures faster and more efficient installation and removal while maintaining the original safety strategy. This significantly reduces installation time and costs, saves manpower and material resources, and improves production efficiency. It can also be quickly adjusted and reconfigured based on actual needs, making it suitable for a variety of building environments and different applications.

[0019] 2. The utility model is connected by meshing the meshing hanger on the hanging part with the hanging plate fixed on the door frame. The meshing hanger on the hanging part is more firmly fixed to the door frame through the weight of the door itself. This connection method does not use screws, so there is no problem of screws rusting and corroding, and it will be more convenient and quick to disassemble. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the three-dimensional structure of a steel Class A fire door that is easy to disassemble and assemble according to Example 1 of the utility model;

[0021] Figure 2 for Figure 1 Schematic diagram of the three-dimensional structure when the middle door frame is removed;

[0022] Figure 3 for Figure 1 Schematic diagram of the exploded structure of the fixing device;

[0023] Figure 4 for Figure 3 Schematic diagram of the three-dimensional structure of the middle suspension device;

[0024] Figure 5 for Figure 4 Schematic diagram of the enlarged structure at A in the middle;

[0025] Figure 6 for Figure 1 Schematic diagram of the three-dimensional structure of the middle door panel;

[0026] Figure 7 for Figure 3 Schematic diagram of the three-dimensional structure of the door shaft;

[0027] Description of main component symbols

[0028] The numbers in the figure are: 1. Suspension part; 12. Latch rod; 120. Gear teeth; 121. Elastic sheet; 122. Rocker; 123. Spring; 124. Claw hook; 125. Fixed axis one; 126. Fixed axis two; 127. Fixed axis three; 13. Engaging hanger; 2. Fixed plate; 3. Bushing; 31. Ratchet assembly; 311. Ratchet; 312. Curved block; 32. Push block; 4. Door panel; 40. Mounting slot; 41. Door axis.

[0029] The above description of the main component symbols is combined with the accompanying drawings and specific implementation methods to further illustrate the present invention in detail. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] It should be noted that when a component is referred to as being "mounted on" another component, it may be directly on the other component or there may be a central component. When a component is considered to be "set on" another component, it may be directly set on the other component or there may be a central component. When a component is considered to be "fixed to" another component, it may be directly fixed to the other component or there may be a central component.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which this invention pertains. The terms used herein in the specification of this invention are for the purpose of describing specific embodiments only and are not intended to limit this invention. The term "or / and" as used herein includes any and all combinations of one or more of the associated listed items.

[0033] Example 1: Please refer to Figure 1-Figure 7The present embodiment provides a steel Class A fire door that is easy to disassemble and assemble, including a hanging part 1, a latch rod 12, a gear 120, an elastic sheet 121, a rocker 122, a horn hook 124, a fixed shaft 125, a fixed shaft 2 126, a fixed shaft 3 127, an engaging hanger 13, a fixed plate 2, a sleeve 3, a ratchet assembly 31, a ratchet 311, a curved block 312, a push block 32, a door panel 4, a mounting groove 40, a door shaft 41, and a door frame 5.

[0034] An engaging hanger 13 is fixedly installed inside the hanger 1. The engaging hanger 13 is made of stainless steel, and the internal gear teeth are arranged in a linear array inside the hanger. The shaft sleeve 3 is fixedly installed on the engaging hanger 13, and a ratchet assembly 31 is coaxially arranged inside the shaft sleeve 3. The engaging hanger 13 is engaged with the fixed plate 2. The material of the fixed plate 2 is the same as that of the engaging hanger 13. The number of gear teeth on the surface of the fixed plate 2 and the gear teeth on the engaging hanger 13 are the same, but in opposite directions, so that the two can mesh perfectly. There is a limiting groove on the engaging hanger so that the door can be fixed on the fixed plate 2 without shaking. The fixed plate 2 is fixedly connected to the inner side of the door frame 5. The minimum width requirement of the door frame 5 is 120mm to meet more wall thickness requirements. Material requirements for the shaft sleeve 3 and the door shaft 41: The shaft sleeve 3 and the door shaft 41 are made of low-carbon alloy steel. After carburizing and quenching, these materials have high surface hardness and impact toughness, which extends the service life of the parts and can be applied to more environments.

[0035] Latch lever 12 is pinned to one side of engagement hanger 13. Latch lever 12 is shaped like an irregular hexagon, symmetrical about its central axis. This shape prevents rotation of the latch lever 12 and engagement hanger 13 along their central axis, ensuring structural stability. Two gear teeth 120 are fixedly attached to one end of the latch lever 12. Both the latch lever 12 and the gear teeth 120 are made of the same alloy steel, such as 40Cr, 42CrMo, or 35CrMo, offering high strength and toughness. Heat treatments such as quenching and tempering, carburizing, and quenching can further enhance their performance. A bump is also fixedly attached to one end of the latch lever 12, with rounded corners for safer operation.

[0036] The gear teeth 120 abut against the elastic sheet 121, and the elastic sheet 121 is "V"-shaped. The elastic sheet 121 is made of elastic alloy material. In addition to having good elastic properties, it also has the characteristics of high hardness, non-magneticity, high resistance to micro-plastic deformation, small temperature coefficient of elastic modulus, and small internal friction.

[0037] Pulling the latch lever 12 causes the elastic piece 121 to rotate about the fixed axis 125, which prevents the elastic piece from shifting to another position. Once one end of the elastic piece 121 enters the slot in the latch lever 12, the latch lever 12 is pushed further, causing the elastic piece 121, near one end of the latch lever 12, to remain at the highest point of the gear teeth 120 of the latch lever 12. The gear teeth 120 are shaped like an isosceles trapezoid, allowing the elastic piece to rest at the top without sliding and falling off. This reciprocating motion of the latch lever 12 optimizes operation and makes it easier to understand.

[0038] The other end of the elastic sheet 121 is connected to the seesaw 122 with a flat key, driving the seesaw 122 to rotate counterclockwise around the two fixed shafts 126, driving the other end of the seesaw 122 to rotate counterclockwise. The seesaw 122 is made of high manganese steel ZMn13, which has high hardness and wear resistance, and has little wear caused by long-term use.

[0039] Rocker 122 pulls spring 123, driving clevis hook 124 to rotate clockwise around fixed axis 3 127, moving clevis hook 124 away from ratchet 311. Claw hook 124 is J-shaped. When engaged with ratchet 311, it firmly hooks onto the teeth of ratchet 311, preventing the ratchet from slipping and losing control. Furthermore, this prevents the door panel from falling off due to the separation of sleeve 3 from door shaft 41. The teeth of ratchet 311 are asymmetrical trapezoidal in shape, designed to withstand high loads.

[0040] Keeping the latch lever 12 in its position, the push block 32 is moved. The push block is also in the shape of a regular hexahedron, with rounded corners and a frosted surface. The ratchet assembly 31 rotates coaxially along the sleeve 3. The curved block 312 at one end of the ratchet assembly 31 slides to the initial position of the push block 32, thereby opening the sleeve 3. The sleeve 3 is then fitted onto the door shaft 41, and the push block 32 and latch lever 12 are returned to their initial positions.

[0041] A mounting groove 40 is provided on one side of the door panel 4. The mounting groove 40 is in the shape of an "I" character. A door shaft 41 is disposed within the mounting groove 40. The depth of the mounting groove is twice the diameter of the door shaft. The door shaft 41 can slide along the groove at both ends. When the fire door is closed, the door shaft 41 slides toward the inside of the mounting groove 40, and the hanger 1 abuts against the door panel 4, closing the fire door. When the fire door is opened, the door shaft 41 slides toward the outside of the mounting groove 40, moving the hanger 1 away from the door panel 4. The fire door is then rotated, causing the door shaft 41 to rotate coaxially with the shaft sleeve 3, driving the fire door to open.

[0042] The door panels are constructed primarily of steel and comply with national safety standards for fire doors. Fire doors are typically 50mm thick, though some regulations allow for up to 55mm in certain circumstances. Class A fire doors must have a fire resistance limit of at least 1.5 hours. This is a core characteristic of Class A fire doors, ensuring they can effectively prevent the spread of fire in the event of a fire. Class A fire doors must be equipped with Class B mechanical anti-theft locks that meet national standards, or meet Class B electronic anti-theft lock standards. The lock cylinder must have 12 closing points, and the extended lock tongue must be at least 16mm long.

[0043] Working principle: The hanging part 1 is engaged with the fixed plate 2 fixed on the door frame through the engaging hanger 13. When the latch rod 12 is pulled, the elastic piece 121 is driven to rotate around the fixed axis 125. After one end of the elastic piece 121 enters the groove of the latch rod 12, the latch rod 12 is pushed again, so that the position of the elastic piece 121 close to one end of the latch rod 12 is maintained at the highest point of the gear teeth of the latch rod 12, so that the other end of the elastic piece 121 is connected to the rocker 122 with a flat key, driving the rocker 122 to rotate counterclockwise around the two fixed axes 126, driving the other end of the rocker 122 counterclockwise. Rotate, thereby pulling the spring to drive the horn hook 124 to rotate clockwise around the fixed axis three 127, so that the horn hook 124 is away from the ratchet 311, maintaining the state of the latch rod 12, and then move the push block 32 to make the ratchet assembly 31 rotate coaxially along the sleeve 3, and the curved block 312 at one end of the ratchet assembly 31 slides to the initial position of the push block 32 to open the sleeve 3, and then the sleeve 3 is put on the door shaft 41, reset the push block 32 and the latch rod 12 to the initial position, the door shaft 41 will slide toward the inside of the mounting groove 40, and the suspension member 1 fits with the door panel 4 to make the fire door closed.

[0044] When the fire door is opened, the door shaft 41 slides outward from the mounting groove 40, moving the hanger 1 away from the door panel 4. The fire door is then rotated, causing the door shaft 41 to rotate coaxially with the shaft sleeve 3, driving the fire door to open. This modular design ensures efficient installation, greatly improves production efficiency, and reduces the need for tools.

[0045] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0046] The above-described embodiments merely represent several implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present utility model patent shall be determined by the appended claims.

Claims

1. A steel Class A fire door that is easy to disassemble and assemble, characterized in that: It includes: A hanging member (1), an engaging hanging member (13), a shaft sleeve (3), a ratchet assembly (31), a door panel (4), a mounting groove (40), and a door shaft (41); the engaging hanging member (13) is fixedly mounted in the hanging member (1); the shaft sleeve (3) is fixedly mounted on the engaging hanging member (13), and the shaft sleeve (3) is coaxially arranged on the outside of the door shaft (41); the ratchet assembly (31) is coaxially arranged inside the shaft sleeve (3); the mounting groove (40) is opened on one side of the door panel (4); and the door shaft (41) is arranged inside the mounting groove (40).

2. The steel Class A fire door that is easy to assemble and disassemble according to claim 1, characterized in that: It also includes a fixing plate (2) and a door frame (5), wherein the engaging hanger (13) is engaged with the fixing plate (2), and the fixing plate (2) is fixedly connected to the inner side of the door frame (5).

3. The steel Class A fire door that is easy to assemble and disassemble according to claim 1, characterized in that: It also includes a latch rod (12), the latch rod (12) is pin-connected to one side of the engagement hanger (13), and one end of the latch rod (12) is fixedly connected to two gear teeth (120).

4. The steel Class A fire door that is easy to assemble and disassemble according to claim 3, characterized in that: The gear teeth (120) abut against the elastic sheet (121), and the elastic sheet (121) is in a "V" shape.

5. The steel Class A fire door that is easy to assemble and disassemble according to claim 4, characterized in that: A seesaw (122) is connected to a flat key on one side of the elastic sheet (121), the seesaw (122) abuts between two fixed shafts (126), one end of the seesaw (122) is fixedly connected to a spring (123), the other end of the spring (123) is fixedly connected to a horn hook (124), the horn hook (124) is coaxially arranged with a fixed shaft (127), and the fixed shaft (127) is fixedly connected to the inside of the sleeve (3).

6. The steel Class A fire door that is easy to assemble and disassemble according to claim 4, characterized in that: The elastic sheet (121) is coaxially arranged with a fixed shaft (125), and the fixed shaft (125) is fixedly connected to the inside of the shaft sleeve (3).

7. The steel Class A fire door that is easy to assemble and disassemble according to claim 5, characterized in that: The ratchet assembly (31) further comprises: a ratchet (311), a curved block (312), and a push block (32); the horn hook (124) is meshedly connected to the ratchet (311), and the ratchet (311) is fixedly connected to one end of the curved block (312); and the push block (32) is fixedly connected to the connection between the ratchet (311) and the curved block (312).

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