Universal safety blocking net for aircraft cabin door

Abstract

The utility model discloses an aircraft cabin door universal safety blocking net which comprises two blocking net rods and a warning blocking net, the two ends of the warning blocking net are connected with the two blocking net rods through length adjusting structures respectively, and the length of the portion, between the two blocking net rods, of the warning blocking net can be adjusted through the length adjusting structures. The blocking net rod comprises a rotating handle in the middle, two fixed pipes rotationally connected to the two ends of the rotating handle respectively, two telescopic pipes inserted into the two fixed pipes in a sliding mode respectively, two installation heads fixed to the two telescopic pipes respectively, and a handle fixedly connected with the two fixed pipes. A transmission mechanism connected with the rotating handle and the telescopic pipes is further arranged in the blocking net rod, and when the rotating handle is rotated, the two telescopic pipes can be driven to stretch out and retract back at the same time through the transmission mechanism. According to the utility model, the safety is considered, the cabin doors of various sizes can be commonly used, and the portable performance is realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of airplane cabin door safety screen, specifically relates to a kind of general-purpose safety screen of airplane cabin door. BACKGROUND

[0002] Any person entering the aircraft is exposed to the risk of falling from the door, this includes airline personnel (pilots, cabin crew, maintenance personnel) as well as passengers, and external ground staff, such as jumpers, cleaning and catering personnel, etc. Aircraft doors refer to boarding doors, emergency doors, cargo doors and ground service maintenance doors in each area of the fuselage.

[0003] During short stopover or maintenance, the aircraft door can need to be kept open for various reasons. In this case, safety equipment must be used and certain precautions must be taken.

[0004] The Cabin Crew Operations Manual (CCOM) states that when the door is open and not secured to a boarding bridge or jetway, a door warning tape should be installed, and the door should not be unattended. The door warning tape is rolled up by elastic force and stored in the door frame of each passenger cabin door at ordinary times, and it is only a warning tool, which can only be used for a limited time before closing the door.

[0005] When the door is kept open for a long time and unattended, the aircraft manufacturer and the International Air Transport Association (IATA) recommend installing a door safety screen without a boarding ladder or jetway, which is the most effective protection against falling from an open door. Each type of door on all aircraft, including passenger doors, emergency doors and cargo doors, is designed with a safety screen. The safety screen is not stored on the aircraft at ordinary times, and it is installed by maintenance personnel, and its reference can be found in the tool and equipment manual (TEM) of each type of aircraft.

[0006] However, the existing original door safety screen is not universal in size, and is too large in size, and the order cycle is long, which causes the shortage of safety screen tools, the difficulty of tool storage and carrying in the maintenance of major airlines and maintenance enterprises in actual work. UTILITY MODEL CONTENT

[0007] The utility model aims at providing a kind of general-purpose safety screen of airplane cabin door, which can be universal for multiple sizes of doors while ensuring safety, and is portable.

[0008] The utility model achieves the purpose by the following technical solutions:

[0009] The utility model provides a kind of aircraft cabin door general safety barrier, it is characterized by including two barrier rods and warning barrier, the two ends of warning barrier are connected with two barrier rods respectively by length adjusting structure, the length of warning barrier between two barrier rods can be adjusted by length adjusting structure, barrier rod includes rotating handle in middle part, two fixed pipes rotatingly connected in rotating handle two ends respectively, two telescopic pipes slidingly inserted in two fixed pipes respectively, two mounting heads fixed on two telescopic pipes respectively and handle fixedly connected with two fixed pipes, transmission mechanism connecting rotating handle and telescopic pipe is further provided in barrier rod, rotating rotating handle can drive two telescopic pipes to extend and retract simultaneously by transmission mechanism.

[0010] The utility model further provides a technical scheme: ratchet locking mechanism for unidirectionally locking the rotating direction between rotating handle and fixed pipe is further provided on barrier rod.

[0011] The utility model further provides a technical scheme: two ends of rotating handle are respectively equipped with connecting column, connecting column is inserted into the end of fixed pipe, and rotating connection is realized by bearing, ratchet locking mechanism includes ratchet, pawl and torsion spring, ratchet is fixedly sleeved on connecting column, pawl is rotatably installed on the pipe wall of the end of fixed pipe, locking end of pawl is inserted into fixed pipe and cooperates and is clamped on ratchet, manual pressing end of pawl is extended to outside fixed pipe, and the elastic force of torsion spring acts on pawl, so that the locking end of pawl can keep being clamped on ratchet.

[0012] The utility model further provides a technical scheme: ratchet locking mechanism further includes mounting seat, mounting seat is embedded on the pipe wall of the end of fixed pipe, mounting hole is arranged on mounting seat, pawl is rotatably installed in mounting hole, and torsion spring is cooperatively installed in mounting hole.

[0013] The utility model further provides a technical scheme: transmission mechanism includes screw rod and two nuts, screw rod passes through the middle part of rotating handle, and rotating handle is fixedly connected with the middle part of screw rod, the rotating direction of the thread of two ends of screw rod is opposite, and the rotating direction of the thread of two nuts is also reversely corresponding, two nuts are fixed at the inner end of telescopic pipe respectively, and two ends of screw rod are threadedly connected with two nuts respectively.

[0014] The utility model further provides a technical scheme: the outer end of telescopic pipe is equipped with threaded hole, threaded column is arranged on mounting head, and mounting head is fixedly installed on threaded hole by threaded column.

[0015] The utility model further provides a technical scheme: warning barrier includes longitudinal band and transverse band fixedly connected in sequence and cross, and two ends of each longitudinal band are connected with barrier rod by length adjusting structure respectively.

[0016] The further technical scheme of the utility model discloses: length adjusting structure includes spacing sheet and pressure buckle, both ends of spacing sheet are fixed on fixed pipe, spacing hole is formed between the surface of spacing sheet and fixed pipe, the end of longitudinal band passes through spacing hole and is connected with itself through pressure buckle.

[0017] The further technical scheme of the utility model discloses: fixed pipe is equipped with spacing screw at the position corresponding to telescopic pipe, and the inner end of spacing screw on the outer wall of telescopic pipe is equipped with axial spacing slot.

[0018] Compared with the prior art, the utility model has the following beneficial effects:

[0019] The utility model discloses through rotating handle drive telescopic pipe and extend and retract simultaneously, adjust in width direction, through length adjusting structure can adjust the length of warning screen between two screen rods, can adjust in length direction, thereby the safety screen of the utility model discloses can be applicable to multiple size's hatch, and the versatility is good.The utility model discloses when being fixedly installed on hatch can provide warning and safety protection through warning screen, and the safety is considered.The utility model discloses can wind warning screen on screen rod and store, and can be moved through handle lifting, convenient to carry. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is the front view schematic diagram of the safety screen of the utility model embodiment when unfolding;

[0021] Figure 2 It is the three-dimensional schematic diagram of the screen rod in the contraction state of the utility model embodiment;

[0022] Figure 3 It is the front view schematic diagram of the screen rod in the contraction state of the utility model embodiment;

[0023] Figure 4 It is the front view schematic diagram of the screen rod in the elongation state of the utility model embodiment;

[0024] Figure 5 It is Figure 4 The sectional view schematic diagram of C-C in;

[0025] Figure 6 It is the cross section schematic diagram of the screen rod at ratchet lock mechanism of the utility model embodiment.

[0026] The meaning of reference signs in the drawing:

[0027] 1-blocking pole; 2-warning blocking net; 3-locking end; 4-press buckle; 5-square cloth; 6-warning slogan; 7-connecting column; 8-longitudinal belt; 9-transverse belt; 10-handle; 11-fixing tube; 12-mounting head; 13-limiting plate; 14-rotating handle; 15-ratchet; 16-mounting seat; 17-telescopic tube; 18-limiting screw; 19-limiting hole; 20-threaded hole; 21-threaded column; 22-nut; 23-screw; 24-bearing; 25-ratchet; 26-mounting hole; 27-pin; 28-torsion spring; 29-limiting step; 30-manual pressing end. DETAILED DESCRIPTION

[0028] The present invention is further described below in conjunction with the embodiments.

[0029] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0030] In the description of this utility model, "several" means one or more, "many" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The use of "first" and "second" in the description is solely for the purpose of distinguishing technical features and is not to be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0031] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0032] Example:

[0033] like Figures 1 to 6 Shown is a universal safety barrier for aircraft cabin doors of this embodiment, which includes two barrier poles 1 and a warning barrier 2.

[0034] The fence pole 1 includes a rotating handle 14, two fixed tubes 11, two telescopic tubes 17, two mounting heads 12, a handle 10 and a ratchet locking mechanism. The handle 10 is made of aviation aluminum alloy through precision machining, and the mounting head 12 is made of engineering plastic. The rotating handle 14 is cylindrical and located in the middle, and the two fixed tubes 11 are located on both sides. Figure 5As shown, the two ends of the rotating handle 14 are respectively provided with connecting columns 7, the two ends of the connecting columns 7 are respectively inserted into the end portions of the two fixed tubes 11, and the rotating connection between the connecting columns 7 and the fixed tubes 11 is realized through bearings 24, so that the rotating handle 14 can rotate relative to the fixed tubes 11. The handle 10 is also located in the middle, and the two ends of the handle 10 are respectively fixedly connected with the two fixed tubes 11, but the handle 10 is not connected with the rotating handle 14. When in use, the two fixed tubes 11 can be fixed by holding the handle 10 with the hand, and at this time, the rotating handle 14 can be rotated. The handle 10 can also assist in storage and portability while ensuring use strength, and the carrying and installation of the safety barrier can be completed by one person, which greatly improves the maintenance work efficiency.

[0035] The two telescopic tubes 17 are respectively slidably inserted on the two fixed tubes 11, the outer ends of the two telescopic tubes 17 are respectively provided with threaded holes 20, the mounting head 12 is provided with a threaded column 21, and the mounting head 12 is fixedly installed on the threaded hole 20 through the threaded column 21, so as to fix the mounting head 12 on the telescopic tube 17. The mounting head 12 is used for abutting against the door frame of the cabin door to realize the fixation of the safety barrier. The mounting head 12 connected through threads can be conveniently replaced, and can be suitable for cabin doors of different types of installation positions while ensuring that the aircraft body is not damaged.

[0036] The surface of the rotating handle 14 of the embodiment is knurled and blue anodized, the surface of the fixed tube 11 is red anodized, and the surface of the telescopic tube 17 is blue anodized. The red is defined as a warning color on the aircraft, and the color difference between the three colors is obvious, so that the warning effect of the safety barrier is more obvious.

[0037] The transmission mechanism connecting the rotating handle 14 and the telescopic tube 17 is also arranged in the barrier rod 1, and when the rotating handle 14 is rotated, the two telescopic tubes 17 can be driven to simultaneously extend and retract through the transmission mechanism. Figure 5 As shown, the specific structure of the transmission mechanism is as follows: it comprises a screw rod 23 and two nuts 22, the screw rod 23 and the nut 25 are selected from aviation aluminum alloy and are formed through mechanical precision machining, the screw rod 23 passes through the middle portion of the rotating handle 14, and the rotating handle 14 is fixedly connected with the middle portion of the screw rod 23, so that when the rotating handle 14 is rotated, the screw rod 23 can be driven to rotate. The rotation directions of the threads at the two ends of the screw rod 23 are opposite, the rotation directions of the threads of the two nuts 22 are also opposite, the two nuts 22 are respectively fixed at the inner ends of the telescopic tubes 17, and the two ends of the screw rod 23 are respectively threadedly connected with the two nuts 222. When in use, the handle 10 is held with the hand, and then the rotating handle 14 is rotated to drive the screw rod 23 to rotate, so that the two telescopic tubes 17 can be driven to simultaneously extend and retract.

[0038] The ratchet locking mechanism is arranged at a position where one end of the rotating handle 14 is located, and is used to unidirectionally lock the rotating direction between the rotating handle 14 and the fixed tube 11, that is, when the ratchet locking mechanism is not operated, the rotating handle 14 can only rotate in one direction relative to the fixed tube 11, and the direction of rotation will make the two telescopic tubes 17 extend at the same time, and when it is needed to rotate the rotating handle in the reverse direction, it is needed to first operate the ratchet locking mechanism to make it unlocked. In this way, the risk that the safety screen is invalid due to the loosening of the screen rod caused by reverse rotation can be prevented.

[0039] As shown in Figure 6 The ratchet locking mechanism of the embodiment includes a mounting seat 16, a ratchet wheel 25, a pawl 15 and a torsion spring 28, the ratchet wheel 25 is fixedly sleeved on the connecting column 7, the ratchet wheel 25 and the connecting column 7 are fixedly connected through a key groove and a flat key, the mounting seat 16 is inlaid on the wall of the end portion of the fixed tube 11, the mounting seat 16 is provided with a mounting hole 26, the pawl 15 is rotatably installed in the mounting hole 26 through a pin shaft 27, one end of the pawl 15 which extends into the fixed tube 11 is a locking end 3, the locking end 3 is matched and clamped on the ratchet wheel 25, and the other end of the pawl 15 which extends out of the fixed tube 11 is a manual pressing end 30. When it is needed to unlock the ratchet locking mechanism, the manual pressing end 30 is pressed inward by hand to make the pawl 15 rotate, the locking end 3 of the pawl 15 will be turned outward and separated from the ratchet wheel 25, at this time, the ratchet wheel 25 can be freely rotated. The ratchet locking mechanism is made of stainless steel, which ensures that the surface is wear-resistant and the quality is reliable.

[0040] The torsion spring 28 is matched and installed in the mounting hole 26, and the specific installation structure is that a limiting step 29 is arranged on the side wall of the mounting hole 26, the torsion spring 28 is sleeved on the pin shaft 27, one end of the torsion spring 28 is pressed on the limiting step 29, and the other end is pressed on the inner side of the manual pressing end 30. The elastic force of the torsion spring 28 will act on the pawl 15, and when the pawl 15 is not pressed, the locking end 3 of the pawl 15 can be kept clamped on the ratchet wheel 25.

[0041] The warning net 2 comprises a plurality of longitudinal belts 8 and transverse belts 9 which are fixedly connected in sequence and cross each other, and the longitudinal belts 8 and the transverse belts 9 are red one-inch-wide flame-retardant nylon ribbons. A square cloth 5 is fixed in the middle of the warning net 2, and a warning slogan 6 is arranged on the square cloth 5. The two ends of each longitudinal belt 8 are connected with the net rods 1 through length adjusting structures, and the length of the warning net between the two net rods can be adjusted through the length adjusting structures. The length adjusting structure comprises a limiting piece 13 and a press buckle 4, the two ends of the limiting piece 13 are fixed on a fixed tube 11, a limiting hole 19 is formed between the limiting piece 13 and the surface of the fixed tube 11, the end of the longitudinal belt 8 passes through the limiting hole 19 and is connected with itself through the press buckle 4, and the length of the longitudinal belt 8 can be adjusted by adjusting the press buckle 4. The press buckle 4 is a one-way zinc alloy press buckle with a minimum safety tension of 250KG. Reflective strips are sewn on the front and back surfaces of the warning net 2, so that the safety and reliability of the warning net 2 can be better ensured.

[0042] The limiting screw 18 is arranged on the fixed tube 11 and corresponds to the position of the telescopic tube 17, and an axial limiting groove is arranged on the inner end of the limiting screw 18 and corresponds to the position of the telescopic tube 17, so that the rotation of the telescopic tube 17 is limited by the limiting screw 18, and the telescopic tube 17 can only slide out and retract, and cannot rotate.

[0043] When the safety net needs to be fixedly installed on the cabin door, the length of the warning net 2 between the two net rods 1 is adjusted according to the height of the cabin door, then the net rods 1 are fixed on the upper and lower ends of the cabin door, when the net rods 1 are fixed, the handle 10 is held by hand, then the rotating handle 14 is rotated to drive the screw rod 23 to rotate together, so that the two telescopic tubes 17 are simultaneously extended, the mounting heads 12 at the two ends are abutted against the door frame of the cabin door to realize fixation, at this time, the locking end 3 of the pawl 15 is clamped on the ratchet wheel 25, and the rotating handle 14 will not be reversely rotated relative to the fixed tube 11, so that the loosening of the net rods 1 is prevented, and the safety net is not disabled. When the safety net needs to be dismounted from the cabin door, the handle 10 is held by hand, and the manual pressing end 30 of the pawl 15 is pressed at the same time, so that the locking end 3 of the pawl 15 is separated from the ratchet wheel 25, at this time, the rotating handle 14 can be reversely rotated, so that the two telescopic tubes 17 are simultaneously retracted, and the safety net is dismounted.

[0044] The above embodiments of the utility model are not the limitation of the protection scope of the utility model, the implementation modes of the utility model are not limited to this, and other various forms of modification, replacement or change of the above structure of the utility model can be made according to the above content of the utility model and the ordinary technical knowledge and conventional means in the field, and the modification, replacement or change should be within the protection scope of the utility model.

Claims

1. A universal safety screen for aircraft doors, characterized by: It includes two blocking rods and a warning net, the two ends of the warning net are respectively connected to the two blocking rods through a length adjustment structure, and the length adjustment structure can adjust the length of the warning net between the two blocking rods. The blocking rod includes a rotating handle in the middle, two fixed tubes that are respectively rotatably connected to the two ends of the rotating handle, two telescopic tubes that are respectively slidably inserted on the two fixed tubes, two mounting heads that are respectively fixed on the two telescopic tubes and a handle fixedly connected to the two fixed tubes. A transmission mechanism connecting the rotating handle and the telescopic tube is also provided in the blocking rod. When the rotating handle is rotated, the two telescopic tubes can be driven to extend and retract at the same time through the transmission mechanism.

2. The universal safety screen for aircraft doors according to claim 1, characterized in that: The blocking rod is also provided with a ratchet locking mechanism for locking the rotation direction between the rotating handle and the fixing pipe in one direction.

3. The universal safety screen for aircraft doors according to claim 2, characterized in that: The two ends of the rotating handle are respectively provided with connecting columns, which penetrate into the end of the fixed tube and are rotatably connected through bearings. The ratchet locking mechanism includes a ratchet, a pawl and a torsion spring. The ratchet is fixedly sleeved on the connecting column, and the pawl is rotatably mounted on the tube wall of the end of the fixed tube. The locking end of the pawl extends into the fixed tube and is engaged with the ratchet. The manual pressing end of the pawl extends out of the fixed tube. The elastic force of the torsion spring acts on the pawl so that the locking end of the pawl can remain engaged with the ratchet.

4. The universal safety screen for aircraft doors according to claim 3, characterized in that: The ratchet locking mechanism also includes a mounting seat, which is embedded in the tube wall of the end of the fixed tube. The mounting seat is provided with a mounting hole, the pawl is rotatably mounted in the mounting hole, and the torsion spring is cooperatively mounted in the mounting hole.

5. The universal safety screen for aircraft doors according to claim 1, characterized in that: The transmission mechanism includes a screw and two nuts. The screw passes through the middle of the rotating handle, and the rotating handle is fixedly connected to the middle of the screw. The rotation directions of the threads at both ends of the screw are opposite, and the rotation directions of the threads of the two nuts are also correspondingly opposite. The two nuts are respectively fixed to the inner ends of the telescopic tube, and the two ends of the screw are respectively threadedly connected to the two nuts.

6. The universal safety screen for aircraft doors according to claim 1, characterized in that: A threaded hole is provided at the outer end of the telescopic tube, and a threaded column is provided at the mounting head. The mounting head is fixedly mounted on the threaded hole via the threaded column.

7. The universal safety screen for aircraft doors according to claim 1, characterized in that: The warning barrier includes longitudinal belts and transverse belts which are cross-fixed and connected together in sequence, and both ends of each longitudinal belt are connected to the barrier rod through the length adjustment structure.

8. The universal safety screen for aircraft doors according to claim 7, characterized in that: The length adjustment structure includes a limiting plate and a press buckle. The two ends of the limiting plate are fixed on the fixed tube. A limiting hole is formed between the limiting plate and the surface of the fixed tube. The end of the longitudinal belt passes through the limiting hole and is connected to itself through the press buckle.

9. The universal safety screen for aircraft doors according to claim 1, characterized in that: A limiting screw is provided on the fixed tube at a position corresponding to the telescopic tube, and an axial limiting groove is provided on the outer wall of the telescopic tube at an inner end corresponding to the limiting screw.

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