Fire-fighting escape door

Abstract

The invention provides a fire-fighting escape door, and relates to the field of fire-fighting doors, the fire-fighting escape door comprises a support frame, and two door bodies are rotatably connected to the inner side of the rear end of the support frame in a bilateral symmetry manner; the opening and closing control frame is slidably arranged on the upper side of the rear end face of the auxiliary slope. The opening and closing auxiliary mechanism is arranged between the opening and closing control frame and the supporting shaft; the escape indication board is fixedly connected to the center position of the upper end of the supporting frame. The water storage tank is arranged right above the escape indication board; and the cleaning auxiliary mechanism is arranged between the water storage tank and the escape indication board. The door body is driven in advance, so that the escape exit is automatically opened, the opening efficiency of the fire exit door is guaranteed, the door body is kept at the maximum turning angle, the stampede accident caused by a large number of people is relieved, the smoke blocking efficiency is improved, the residence time of escape people in a fire scene is shortened, and the problem that after people escape from the fire exit door, the escape exit is automatically opened is solved. The fire exit door needs to be pushed manually to close the fire exit passage and block the smoke, so that the smoke blocking efficiency is influenced.

Description

Technical Field

[0001] The present invention relates to the technical field of fire doors, in particular to a fire escape door. Background Art

[0002] In the actual application of fire escape doors, when encountering a dangerous situation, after people open the fire escape doors to escape, in order to prevent the smoke from continuing to spread, they need to close the fire escape doors to block the smoke.

[0003] As shown in the existing application number CN201910092062.2, a highly sealed fire escape door proposed by the present invention is disclosed, comprising a door body and a first door frame, wherein the door body is rotatably mounted on the first door frame, and the door body can rotate forward and backward relative to the first door frame, and further comprises a second door frame and a sealing strip; the second door frame is arranged on the outer surface of the first door frame, and the sealing strip is arranged on the second door frame, and a sealing groove matching the sealing strip is provided on the door body, and the second door frame, the sealing strip, the first door frame and the door body form a sealed cavity, and when a fire occurs, the door body is not completely closed due to the rush of the crowd to escape, so that there is a gap between the door body and the first door frame, the sealing cavity formed by the second door frame, the sealing strip, the first door frame and the door body is sealed to prevent the smoke on one side of the fire door from entering the other side when the door body is not completely closed, thereby increasing the smoke and fire prevention effect of the fire door.

[0004] However, after escaping through the fire door, the escapees need to manually push the fire door to close the fire passage and block the smoke, which affects the efficiency of blocking the smoke. At the same time, during the escape process, the escapees need to run to the door and then push the fire door, which affects the opening efficiency of the fire door, prolongs the stay time of the escapees in the fire scene, and reduces the effectiveness of the fire escape door in actual application. Summary of the invention

[0005] In view of this, the present invention provides a fire escape door, which utilizes the force generated when stepping on an opening and closing control frame to drive the door body in advance, so that the escape mouth is automatically opened, thereby ensuring the opening efficiency of the fire door. At the same time, after the personnel escape to the escape mouth, the door body is automatically closed, which improves the blocking efficiency of smoke, greatly shortens the staying time of the escaping personnel in the fire scene, and further improves the use effect of the fire escape door in actual application.

[0006] The present invention provides a purpose and function of a fire escape door, specifically comprising: a support frame, a door body, an opening and closing control frame, an opening and closing auxiliary mechanism, an escape sign, a water tank and a cleaning auxiliary mechanism, wherein the outer side of the front end of the support frame is fixedly connected with an auxiliary slope; the door body has two doors, and the two door bodies are symmetrically connected to the inner side of the rear end of the support frame; the upper and lower sides of the outer end of the door are fixedly connected with a support shaft; the opening and closing control frame is slidably arranged on the upper side of the rear end surface of the auxiliary slope; the opening and closing auxiliary mechanism is arranged between the opening and closing control frame and the support shaft; the opening and closing auxiliary mechanism comprises: a transmission shaft, the transmission shaft has two transmission shafts, and the two transmission shafts are respectively connected to the left and right sides of the inside of the support frame; the escape sign The water tank is fixedly connected to the center position of the upper end of the support frame; the water tank is arranged just above the escape sign, the water tank is fixedly connected to the support frame, a water supply pipe is arranged between the water tank and the support frame, and the outer end of the water supply pipe is fixedly connected to the water outlet end of the faucet; the cleaning auxiliary mechanism is arranged between the water tank and the escape sign, and the cleaning auxiliary mechanism includes: a driving screw, a transmission auxiliary frame and a cleaning roller, there are two driving screws, and the two driving screws are respectively rotatably arranged on the left and right sides below the water tank; there are two transmission auxiliary frames, and the two transmission auxiliary frames are respectively threadedly connected to the outer sides of the two driving screws; the cleaning roller is rotatably arranged at the outer ends of the two transmission auxiliary frames, and the outer sides of the cleaning roller are in contact with the escape sign.

[0007] Furthermore, the inner end faces of the door body are all arc-shaped; and a fire-retardant sealing strip is fixedly connected to the outer side of the inner end face of the door body.

[0008] Furthermore, the lower end of the opening and closing control frame is fixedly connected to the movable frame by an elastic connecting piece; the lower ends of the movable frame and the opening and closing control frame are both in a T-shaped structure; the left and right sides of the rear end of the opening and closing control frame are fixedly connected to the limiting auxiliary frames, and the two limiting auxiliary frames are both T-shaped frame structures; the lower side of the rear end of the limiting auxiliary frame is fixedly connected to the positioning auxiliary frame; the transverse cross-section of the positioning auxiliary frame is an L-shaped structure.

[0009] Furthermore, the opening and closing auxiliary mechanism also includes: a first driving gear and a driving rack, there are two first driving gears, and the two first driving gears are coaxially fixedly connected to the outer sides of the two transmission shafts; there are two driving racks, and the two driving racks are symmetrically fixedly connected to the outer side of the opening and closing control frame; the first driving gears and driving racks on the same side are meshed with each other, and the first driving gears and driving racks together constitute a gear rack transmission mechanism.

[0010] Furthermore, the opening and closing auxiliary mechanism also includes: a driving bevel gear, a driven bevel gear and an elastic reset member, there are two driving bevel gears, and the two driving bevel gears are coaxially fixedly connected to the outer sides of the rear end faces of the two transmission shafts; there are two driven bevel gears, and the two driven bevel gears are coaxially fixedly connected to the outer sides of the two bottom support shafts, and the driving bevel gear and the driven bevel gear on the same left and right sides are meshed with each other, and the driving bevel gear and the driven bevel gear together constitute a bevel gear transmission mechanism; there are two groups of elastic reset members, and the two groups of elastic reset members are coaxially fixedly connected to the outer sides of the two groups of support shafts, and the outer ends of the elastic reset members are fixedly connected to the support frame.

[0011] Furthermore, a water outlet is provided at the lower end of the water tank, and the position and size of the water outlet and the escape sign are relatively correct; a water outlet control frame is slidably provided at the outer end of the water outlet, and the transverse cross-section of the water outlet control frame is a convex structure; guide columns are slidably connected to the left and right ends of the water outlet control frame; and the top end surface of the guide column is fixedly connected to the water tank.

[0012] Furthermore, the cleaning auxiliary mechanism also includes: a movable rack and a second driving gear, the movable rack is slidably arranged on the outer side of the lower ends of the two driving screws, and the rear end surface of the movable rack is fixedly connected to a T-shaped guide frame; the second driving gear is coaxially fixedly connected to the outer side of the upper end support shaft on the right side;

[0013] The bottom end surface of the driving screw is coaxially fixedly connected with a second transmission gear; the second transmission gear and the second driving gear are meshed with the movable rack.

[0014] Furthermore, the outer side of the front end of the transmission auxiliary frame is fixedly connected to an elastic positioning frame by an elastic member; the two ends of the cleaning roller are coaxially fixedly connected to a positioning auxiliary shaft; the elastic positioning frame and the positioning auxiliary shaft are rotationally connected.

[0015] Furthermore, the cleaning auxiliary mechanism also includes: a first transmission gear and a transmission rack, there are two first transmission gears, and the two first transmission gears are coaxially fixedly connected to the outside of the positioning auxiliary shaft at both ends of the cleaning roller; there are two transmission racks, and the two transmission racks are respectively arranged on the outside of the two first transmission gears, and the rear end face of the first transmission gear is fixedly connected to the support frame; the first transmission gear and the transmission rack on the same side on the left and right are meshed with each other, and the first transmission gear and the transmission rack together constitute a gear and rack transmission mechanism.

[0016] Beneficial Effects

[0017] When the present invention is in use, due to the influence of the force generated by stepping on the opening and closing control frame during the escape process, the door body is driven in advance to automatically open the escape hole, and when there are many people, the door body is always flipped outward due to the continuous stepping on the opening and closing control frame by the people, and the door body maintains a maximum flipping angle, which improves the smoothness of the people in distress escaping from the fire scene, reduces the stampede accidents caused by a large number of people, and ensures the opening efficiency of the fire door. At the same time, after the people escape to the escape hole, the door body is automatically closed, which improves the blocking efficiency of smoke, greatly shortens the staying time of the escaping people in the fire scene, and further improves the use effect of the anti-escape door in actual application.

[0018] In addition, when the present invention is in use, the escape sign is automatically cleaned during the flipping of the door body, thereby avoiding the problem of dust in the smoke adhering to the escape sign and affecting the indication effect of the escape sign after encountering a dangerous situation. The indication effect of the escape exit is improved during the escape process of subsequent personnel, the escape probability of subsequent personnel is increased, and the use effect of the fire escape door is further improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings of the embodiment are briefly introduced below.

[0020] The drawings described below are only related to some embodiments of the present invention, but are not intended to limit the present invention.

[0021] In the attached picture:

[0022] Figure 1 It is an overall isometric structural schematic diagram of the present invention.

[0023] Figure 2 It is a schematic diagram of the cross-sectional structure of the opening and closing auxiliary mechanism and the door body installation of the present invention.

[0024] Figure 3 It is a schematic diagram of the connection structure between the opening and closing auxiliary mechanism and the opening and closing control frame of the present invention.

[0025] Figure 4 It is a schematic cross-sectional structure diagram of the opening and closing control frame of the present invention.

[0026] Figure 5 It is a schematic diagram of the installation structure of the cleaning auxiliary mechanism and the water outlet control frame of the present invention.

[0027] Figure 6 It is a schematic diagram of the installation structure of the cleaning roller and the water outlet control frame of the present invention.

[0028] Figure 7 It is a schematic structural diagram of the water outlet control frame of the present invention after sliding downward.

[0029] Figure 8 It is a cross-sectional structural schematic diagram of the connection between the transmission auxiliary frame and the elastic positioning frame of the present invention.

[0030] Reference numerals list

[0031] 1. Support frame; 101. Auxiliary ramp; 2. Door body; 201. Support shaft; 202. Fire-blocking sealing strip; 3. Opening and closing control frame; 301. Movable frame; 302. Limit auxiliary frame; 303. Positioning auxiliary frame; 4. Transmission shaft; 401. First drive gear; 402. Driving rack; 403. Active bevel gear; 404. Driven bevel gear; 405. Elastic reset member; 5. Escape sign; 6. Water tank; 601. Water outlet; 602. Water outlet control frame; 603. Guide column; 7. Movable rack; 701. Second drive gear; 702. Driving screw; 703. Transmission auxiliary frame; 704. Elastic positioning frame; 705. Cleaning roller; 706. First transmission gear; 707. Transmission rack; 708. Second transmission gear. DETAILED DESCRIPTION

[0032] Example 1: Please refer to Figures 1 to 4 As shown:

[0033] The present invention provides a fire escape door, comprising a support frame 1, a door body 2, an opening and closing control frame 3, an opening and closing auxiliary mechanism, an escape sign 5, a water tank 6 and a cleaning auxiliary mechanism, wherein the outer side of the front end of the support frame 1 is fixedly connected with an auxiliary slope 101; there are two door bodies 2, and the two door bodies 2 are symmetrically rotated and connected to the inner side of the rear end of the support frame 1; the upper and lower sides of the outer end of the door body 2 are fixedly connected with a support shaft 201; the opening and closing control frame 3 is slidably arranged on the upper side of the rear end surface of the auxiliary slope 101; the opening and closing auxiliary mechanism is arranged between the opening and closing control frame 3 and the support shaft 201; the opening and closing auxiliary mechanism comprises: a transmission shaft 4, there are two transmission shafts 4, and the two transmission shafts 4 are respectively rotatably connected to the left and right sides of the inside of the support frame 1; the escape sign 5 is fixedly connected to the center of the upper end of the support frame 1 Position; the water tank 6 is arranged just above the escape sign 5, the water tank 6 is fixedly connected to the support frame 1, a water supply pipe is arranged between the water tank 6 and the support frame 1, and the outer end of the water supply pipe is fixedly connected to the water outlet end of the faucet; the cleaning auxiliary mechanism is arranged between the water tank 6 and the escape sign 5, the cleaning auxiliary mechanism includes: a driving screw 702, a transmission auxiliary frame 703 and a cleaning roller 705, there are two driving screws 702, and the two driving screws 702 are respectively rotatably arranged on the left and right sides below the water tank 6; there are two transmission auxiliary frames 703, and the two transmission auxiliary frames 703 are respectively threadedly connected to the outer sides of the two driving screws 702; the cleaning roller 705 is rotatably arranged at the outer ends of the two transmission auxiliary frames 703, and the outer sides of the cleaning roller 705 are in contact with the escape sign 5.

[0034] The inner end faces of the door body 2 are all in arc transition; the outer side of the inner end face of the door body 2 is fixedly connected with a fire-retardant sealing strip 202 .

[0035] Among them, the lower end of the opening and closing control frame 3 is fixedly connected to the movable frame 301 by an elastic connecting piece; the lower ends of the movable frame 301 and the opening and closing control frame 3 are both in a U-shaped structure; the left and right sides of the rear end of the opening and closing control frame 3 are fixedly connected to the limiting auxiliary frames 302, and the two limiting auxiliary frames 302 are both T-shaped frame structures; the lower side of the rear end of the limiting auxiliary frame 302 is fixedly connected to the positioning auxiliary frame 303; the transverse cross-section of the positioning auxiliary frame 303 is an L-shaped structure.

[0036] Among them, the opening and closing auxiliary mechanism also includes: a first driving gear 401 and a driving rack 402. There are two first driving gears 401, and the two first driving gears 401 are coaxially fixedly connected to the outer sides of the two transmission shafts 4 respectively; there are two driving racks 402, and the two driving racks 402 are symmetrically fixedly connected to the outer side of the opening and closing control frame 3; the first driving gears 401 and the driving racks 402 on the same side are meshed with each other, and the first driving gears 401 and the driving racks 402 together constitute a gear rack transmission mechanism.

[0037] Among them, the opening and closing auxiliary mechanism also includes: a driving bevel gear 403, a driven bevel gear 404 and an elastic reset member 405. There are two driving bevel gears 403, and the two driving bevel gears 403 are coaxially fixedly connected to the outer sides of the rear end faces of the two transmission shafts 4; there are two driven bevel gears 404, and the two driven bevel gears 404 are coaxially fixedly connected to the outer sides of the two support shafts 201 at the bottom, and the driving bevel gears 403 and the driven bevel gears 404 on the same left and right sides are meshed with each other, and the driving bevel gears 403 and the driven bevel gears 404 together constitute a bevel gear transmission mechanism; there are two groups of elastic reset members 405, and the two groups of elastic reset members 405 are coaxially fixedly connected to the outer sides of the two groups of support shafts 201, and the outer ends of the elastic reset members 405 are fixedly connected to the support frame 1.

[0038] The specific usage and function of this embodiment are as follows:

[0039] When the present invention is in use, when a person walks toward the escape exit during escape and steps on the opening and closing control frame 3, the elastic connecting member is squeezed to make the opening and closing control frame 3 slide downward. During the downward sliding of the opening and closing control frame 3, the driving rack 402 pushes the first driving gear 401 and the transmission shaft 4 to rotate. When the transmission shaft 4 rotates, the active bevel gear 403 pushes the driven bevel gear 404 and the support shaft 201 to rotate. When the support shaft 201 rotates, the two door bodies 2 are automatically turned outward. When there are many people, the opening and closing control frame 3 is continuously stepped on, so that the door body 2 is always in a state of opening outward. After the last person in the crowd escapes to the escape exit, the elastic connecting member and the elastic reset member 405 reset the opening and closing control frame 3 and the support shaft 201, so that the two door bodies 2 are turned inward to automatically close the escape exit. The fire-blocking sealing strip 202 compensates for the gap between the two door bodies 2 after the door body 2 is closed, thereby improving the sealing effect between the fire point and the escape exit.

[0040] Example 2: Based on Example 1, please refer to Figures 5 to 8 As shown:

[0041] Among them, a water outlet 601 is opened at the lower end of the water tank 6, and the position and size of the water outlet 601 are relatively correct to the escape sign 5; a water outlet control frame 602 is slidably provided at the outer end of the water outlet 601, and the transverse cross-section of the water outlet control frame 602 is a convex structure; the left and right ends of the water outlet control frame 602 are slidably connected with guide columns 603; the top end surface of the guide column 603 is fixedly connected to the water tank 6.

[0042] The cleaning auxiliary mechanism further includes: a movable rack 7 and a second driving gear 701, wherein the movable rack 7 is slidably arranged on the outer side of the lower ends of the two driving screws 702, and the rear end surface of the movable rack 7 is fixedly connected with a T-shaped guide frame; the second driving gear 701 is coaxially fixedly connected with the outer side of the upper end support shaft 201 on the right side;

[0043] The bottom end surface of the driving screw 702 is coaxially fixedly connected with a second transmission gear 708 ; the second transmission gear 708 and the second driving gear 701 are meshed with the movable rack 7 .

[0044] The outer side of the front end of the transmission auxiliary frame 703 is fixedly connected to the elastic positioning frame 704 by an elastic member; the two ends of the cleaning roller 705 are coaxially fixedly connected to the positioning auxiliary shaft; the elastic positioning frame 704 is rotationally connected to the positioning auxiliary shaft.

[0045] Among them, the cleaning auxiliary mechanism also includes: a first transmission gear 706 and a transmission rack 707. There are two first transmission gears 706, and the two first transmission gears 706 are coaxially fixedly connected to the outside of the positioning auxiliary shaft at both ends of the cleaning roller 705; there are two transmission racks 707, and the two transmission racks 707 are respectively arranged on the outside of the two first transmission gears 706, and the rear end surface of the first transmission gear 706 is fixedly connected to the support frame 1; the first transmission gears 706 and the transmission rack 707 on the same side of the left and right are meshed with each other, and the first transmission gear 706 and the transmission rack 707 together constitute a gear rack transmission mechanism.

[0046] The specific usage and function of this embodiment are as follows:

[0047] When the present invention is in use, during the process of flipping and opening the door body 2, the support shaft 201 drives the second driving gear 701 to rotate, and during the rotation of the second driving gear 701, the movable rack 7 is pushed to slide back and forth, and during the sliding process, the movable rack 7 is pushed to rotate the second transmission gear 708 and the driving screw 702, and when the driving screw 702 rotates, it drives the transmission auxiliary frame 703 to slide up and down, and after the transmission auxiliary frame 703 slides downward, due to the influence of the gravity of the water outlet control frame 602, the water outlet control frame 602 slides downward, and the water outlet 601 at the lower end of the water tank 6 is in an open state, and the water inside the water tank 6 flows to the escape sign 5; when the transmission auxiliary frame 703 slides upward, the transmission auxiliary frame 703 slides to the specified position, and the transmission auxiliary frame 703 slides to the specified position. After the top end surface of the auxiliary frame 703 contacts the water outlet control frame 602, the water outlet control frame 602 is pushed to slide the water outlet control frame 602 to the inside of the water outlet 601 and close it. The guide column 603 realizes the guide limit of the water outlet control frame 602 when it slides up and down; in the process of sliding up and down, the transmission auxiliary frame 703 drives the cleaning roller 705 to slide up and down synchronously. In the process of sliding up and down, the transmission rack 707 drives the first transmission gear 706 to rotate, so that the cleaning roller 705 rotates synchronously in the process of sliding up and down, and the escape sign 5 is automatically cleaned. In the process of cleaning the escape sign 5, the elastic positioning frame 704 squeezes the cleaning roller 705, so that the cleaning roller 705 always maintains a pressed state with the escape sign 5.

Claims

1. A fire escape door, comprising: A support frame (1), two door bodies (2), an opening and closing control frame (3), an opening and closing auxiliary mechanism, an escape sign (5), a water tank (6) and a cleaning auxiliary mechanism, characterized in that the outer side of the front end of the support frame (1) is fixedly connected to an auxiliary slope (101); the two door bodies (2) are symmetrically rotatably connected to the inner side of the rear end of the support frame (1); the upper and lower sides of the outer ends of the door bodies (2) are fixedly connected to a support shaft (201); the opening and closing control frame (3) is slidably arranged on the upper side of the rear end surface of the auxiliary slope (101); the opening and closing auxiliary mechanism is arranged between the opening and closing control frame (3) and the support shaft (201); the opening and closing auxiliary mechanism comprises: two transmission shafts (4), the two transmission shafts (4) are rotatably connected to the left and right sides of the inside of the support frame (1); the escape sign (5) is fixedly connected to the upper end of the support frame (1); The water tank (6) is arranged at the center of the escape sign (5); the water tank (6) is fixedly connected to the support frame (1); a water supply pipe is arranged between the water tank (6) and the support frame (1); the outer end of the water supply pipe is fixedly connected to the water outlet of the faucet; the cleaning auxiliary mechanism is arranged between the water tank (6) and the escape sign (5); the cleaning auxiliary mechanism comprises: two driving screws (702), two transmission auxiliary frames (703) and a cleaning roller (705); the two driving screws (702) are rotatably arranged on the left and right sides below the water tank (6); the two transmission auxiliary frames (703) are respectively threadedly connected to the outer sides of the two driving screws (702); the cleaning roller (705) is rotatably arranged at the outer ends of the two transmission auxiliary frames (703), and the outer sides of the cleaning roller (705) are in contact with the escape sign (5).

2. A fire escape door as claimed in claim 1, characterized in that: The inner end faces of the door body (2) are all formed with arc transitions; and a fire-retardant sealing strip (202) is fixedly connected to the outer side of the inner end face of the door body (2).

3. A fire escape door as claimed in claim 1, characterized in that: The lower end of the opening and closing control frame (3) is fixedly connected to a movable frame (301) by means of an elastic connecting piece; the lower ends of the movable frame (301) and the opening and closing control frame (3) are both of U-shaped structure; the left and right sides of the rear end of the opening and closing control frame (3) are fixedly connected to a limiting auxiliary frame (302) of a T-shaped frame structure; the lower side of the rear end of the limiting auxiliary frame (302) is fixedly connected to a positioning auxiliary frame (303) of an L-shaped structure in transverse cross section.

4. A fire escape door as claimed in claim 1, characterized in that: The opening and closing auxiliary mechanism also includes: two first driving gears (401) and two driving racks (402), the two first driving gears (401) are respectively coaxially fixedly connected to the outer sides of the two transmission shafts (4); the two driving racks (402) are symmetrically fixedly connected to the outer side of the opening and closing control frame (3); the first driving gears (401) and the driving racks (402) on the same side are meshed with each other, and the first driving gears (401) and the driving racks (402) together constitute a gear rack transmission mechanism.

5. A fire escape door as claimed in claim 1, characterized in that: The opening and closing auxiliary mechanism further comprises: two active bevel gears (403), two driven bevel gears (404) and two groups of elastic reset members (405); the two active bevel gears (403) are respectively coaxially fixedly connected to the outer sides of the rear end faces of the two transmission shafts (4); the two driven bevel gears (404) are respectively coaxially fixedly connected to the outer sides of the two bottom support shafts (201); the active bevel gears (403) and the driven bevel gears (404) on the same left and right sides are meshed with each other, and the active bevel gears (403) and the driven bevel gears (404) together constitute a bevel gear transmission mechanism; the two groups of elastic reset members (405) are respectively coaxially fixedly connected to the outer sides of the two groups of support shafts (201); and the outer ends of the elastic reset members (405) are fixedly connected to the support frame (1).

6. A fire escape door as claimed in claim 1, characterized in that: A water outlet (601) is provided at the lower end of the water storage tank (6), and the position and size of the water outlet (601) and the escape sign (5) are relatively aligned; a water outlet control frame (602) is slidably provided at the outer end of the water outlet (601), and the transverse cross-section of the water outlet control frame (602) is a convex-shaped structure; guide columns (603) are slidably connected to the left and right ends of the water outlet control frame (602); and the top end surface of the guide column (603) is fixedly connected to the water storage tank (6).

7. A fire escape door as claimed in claim 1, characterized in that: The cleaning auxiliary mechanism further comprises: a movable rack (7) and a second driving gear (701); the movable rack (7) having a T-shaped guide frame fixedly connected to its rear end surface is slidably arranged on the outer side of the lower ends of the two driving screws (702); the second driving gear (701) is coaxially fixedly connected to the outer side of the upper support shaft (201) on the right side; The bottom end surface of the driving screw (702) is coaxially fixedly connected with a second transmission gear (708); the second transmission gear (708) and the second driving gear (701) are meshed with the movable rack (7).

8. A fire escape door as claimed in claim 1, characterized in that: The outer side of the front end of the transmission auxiliary frame (703) is fixedly connected to an elastic positioning frame (704) by means of an elastic member; both ends of the cleaning roller (705) are coaxially fixedly connected to a positioning auxiliary shaft; and the elastic positioning frame (704) is rotationally connected to the positioning auxiliary shaft.

9. A fire escape door as claimed in claim 8, characterized in that: The cleaning auxiliary mechanism also includes: a first transmission gear (706) and a transmission rack (707); there are two first transmission gears (706), and the two first transmission gears (706) are coaxially fixedly connected to the outside of the positioning auxiliary shaft at both ends of the cleaning roller (705); there are two transmission racks (707), and the two transmission racks (707) are respectively arranged on the outside of the two first transmission gears (706), and the rear end surface of the first transmission gear (706) is fixedly connected to the support frame (1); the first transmission gears (706) and the transmission rack (707) on the same left and right sides are meshed with each other, and the first transmission gears (706) and the transmission rack (707) together constitute a gear rack transmission mechanism.

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