CN112610112A

CN112610112A - Window frame with escape handle

Info

Publication number: CN112610112A
Application number: CN202011323292.4A
Authority: CN
Inventors: 吴春妹
Original assignee: Shanghai Haoyu Stainless Steel Co ltd
Current assignee: Shanghai Haoyu Stainless Steel Co ltd
Priority date: 2020-11-23
Filing date: 2020-11-23
Publication date: 2021-04-06

Abstract

The utility model relates to a window frame with handle bar for escaping belongs to the technical field of window frame, and it includes the window frame body and installs in the inside casement of window frame body, window frame body fixed mounting is located indoor wall body and is provided with the dead lever and set up in safe escape mechanism on the dead lever on the wall body. When a fire disaster happens to a high-rise building, the high-rise building needs to be separated from the scene in time, and at the moment, people fix the escape rope on the safety escape mechanism and can safely descend to the ground through the escape rope. Dead lever and safe mechanism of fleing all set up in indoorly, and in the time of installation and maintenance, people stand indoor can install and maintain dead lever and safe mechanism of fleing, convenient and fast more. The dead lever sets up indoor, not only can be convenient for install and maintain, but also can make things convenient for people's sunning clothes, and people can also be used for taking exercise, for example the physical exercise of pressing leg etc..

Description

Window frame with escape handle

Technical Field

The application relates to the technical field of window frames, in particular to a window frame with an escape handle rod.

Background

According to the characteristics of fire and the investigation of the cause of death of people who die from the fire, most people who actually die from the fire are suffocated due to the inhalation of toxic gas, dust and the like. From this point on, one of the most urgent solutions to reduce the casualties of fire is to evacuate the people suffering from the fire as quickly as possible, i.e. to allow them to leave the dangerous environment (smoke and fire) in time. Namely, the disaster-stricken personnel are transferred to a safe place, namely a place without smoke and fire. In the design and construction of houses, the width of corridors is widened and the number of corridors is increased. But this would reduce the usable area of the house and affect the benefits of the builder. And because the corridor is generally designed in the house, when the house catches fire, the corridor can be filled with dense smoke quickly, and great hidden danger is brought to escape of people.

At present, some safety escape windows which can become escape safety ladders at the time of crisis such as fire are designed and applied, for example, the utility model patent with the publication number of CN2152058Y and the name of "safety escape window" consists of a plurality of hinged ladder-shaped metal windows, and the escape ladders can be formed by combining the hinged ladder-shaped metal windows at the time of crisis.

In view of the above-mentioned related art, the inventor believes that the related art needs to separately install the safety escape apparatus outside the ordinary window, and has a drawback of inconvenient installation.

Disclosure of Invention

In order to improve the problem that the safety escape device is inconvenient to install, the application provides a window frame with an escape handle.

The application provides a window frame with escape barre adopts following technical scheme:

the window frame with the escape handle rod comprises a window frame body and a window sash arranged inside the window frame body, wherein the window frame body is fixedly arranged on a wall body, and a fixed rod and a safe escape mechanism arranged on the fixed rod are arranged on the indoor wall body.

By adopting the technical scheme, when a fire disaster happens to a high-rise building, the high-rise building needs to be separated from the scene in time, and at the moment, people fix the escape rope on the safety escape mechanism and can safely descend to the ground through the escape rope. Dead lever and safe mechanism of fleing all set up in indoorly, and in the time of installation and maintenance, people stand indoor can install and maintain dead lever and safe mechanism of fleing, convenient and fast more. The dead lever sets up indoor, not only can be convenient for install and maintain, but also can make things convenient for people's sunning clothes, and people can also be used for taking exercise, for example the physical exercise of pressing leg etc..

Optionally, the safety escape mechanism comprises a support rod and a plurality of first locking blocks arranged in the axial direction of the support rod and used for locking the escape rope, the support rod is rotated to penetrate through the fixed rod, a plurality of arc-shaped holes are formed in the fixed rod, the first locking blocks are in one-to-one correspondence with the arc-shaped holes, and reinforcing components used for improving the bending strength of the fixed rod are arranged on an indoor wall body.

Through adopting above-mentioned technical scheme, when needing to carry out safe escape, will flee the rope and fix on first locking piece, when people descend through the rope of fleing, first locking piece will receive the effect of gravity, and first locking piece will move along the length direction in arc hole, then first locking piece offsets with arc hole towards outdoor one side. When first locking piece rotated, can drive the reinforcement component, strengthened the bending strength of dead lever through the reinforcement component to improve the security.

Optionally, the reinforcing component comprises a buckle plate and a driving piece, the buckle plate is rotatably arranged on the indoor wall body and located between the fixed rod and the ground, the length direction of the buckle plate is the length direction of the fixed rod, and the buckle plate is in an Contraband shape;

the driving piece is arranged on the pinch plate and used for driving the pinch plate to rotate;

when the escape buckle is used, the opening of the buckle plate is arranged towards the direction far away from the ground;

when the life is normally used, the buckle plate is clamped on the fixing rod, and the opening of the buckle plate is arranged towards the ground.

Through adopting above-mentioned technical scheme, when people used the rope of fleing to flee, the bracing piece rotated and will controlled driving piece drive buckle and rotate, and the buckle will rotate the buckle on the dead lever, when the rope of fleing was exerted a tensile to the dead lever, an opposite pulling force will be exerted to the dead lever to the buckle to can reduce the buckling of dead lever, with the bending strength who improves the dead lever.

Optionally, the buckle plate comprises a rotating rod, a first connecting plate, a second connecting plate and a third connecting plate which are fixed in sequence;

the rotating rod is inserted into the wall body, and the first connecting plate, the second connecting plate and the third connecting plate form a \ 21274;

a first mounting hole is formed in one side, far away from the second connecting plate, of the third connecting plate, and the axis direction of the first mounting hole is consistent with the length direction of the rotating rod;

the driving piece is a fixed rope, one end of the fixed rope is fixed at one end of the rotating rod, the fixed rope is arranged in the first mounting hole in a penetrating mode, and one end, extending out of the first mounting hole, of the fixed rope is fixed at the other end of the rotating rod;

the wall body is provided with a plurality of groups of pulley blocks, the fixed rope is sleeved on the pulley blocks, two ends of the supporting rod in the length direction are provided with cutters, and the rotating direction of the cutters towards the fixed rope and provided with the fixed rods is the direction of the cutters cutting the fixed rope;

the both ends of dwang all are provided with the second torsional spring, when fixed rope is in the state of tightening, there is the clearance between cutter and the fixed rope.

Through adopting above-mentioned technical scheme, the rope pulling first locking piece of fleing rotates along the length direction in arc hole, and in the time of first locking piece motion, can drive the bracing piece and rotate, and in the time of the bracing piece pivoted, drive the cutter and rotate, when the cutter rotates, will fix the rope and cut off, after fixed rope cuts off, will be in lax phenomenon in first mounting hole. Due to the resilience force of the second torsion spring, the buckling plate can be driven to rotate towards the direction of the fixing rod, and the buckling plate can be buckled on the fixing rod so as to enhance the bending strength of the fixing rod.

Optionally, the third connecting plate is provided with a plurality of mounting grooves in a direction toward the second connecting plate, and the mounting grooves are distributed along the length direction of the third connecting plate;

the bottom of mounting groove is rotated and is provided with and places the board, place the board and keep away from one side of second connecting plate and seted up the second mounting hole, fixed rope wears to locate in the second mounting hole, it has the green frame of planting to hang to place on the board.

Through adopting above-mentioned technical scheme, under the normal condition, people can place green frame of planting on the buckling board, plant green planting in green frame of planting, not only can fresh air, but also can be more pleasing to the eye, make the buckling board seem very obtrusive that is difficult to show. When fleing, fixed rope after breaking, fixed rope will be followed the second mounting hole and loosened, place the board and will produce the rotation, and green frame of planting will drop indoor to can make green frame of planting be difficult to injure flee personnel by a crashing object, thereby can play not only pleasing to the eye but also safe effect.

Optionally, a baffle plate is arranged on the fixed rod and in the arc hole, a limiting block is arranged at one end of the baffle plate facing the outdoor, limiting grooves are formed in two sides of the fixed rod in the arc hole, and the limiting block is clamped in the limiting grooves.

Through adopting above-mentioned technical scheme, the setting of shielding plate can be convenient for hide first locking piece, reduces people's maloperation.

Optionally, the sum of the length of the first locking block and the diameter of the support rod is 0.9 to 0.95 times the inner diameter of the fixing rod.

Through adopting above-mentioned technical scheme, the bracing piece that can be convenient for rotates to and the installation between bracing piece and the dead lever.

Optionally, two ends of one side of the placing plate, which is far away from the ground, are fixed with limiting edges, and the green plant frame is located between the two limiting edges.

Through adopting above-mentioned technical scheme, the setting of spacing arris can carry on spacingly to the position that green planted the frame, makes the position that green planted the frame be difficult to produce and removes, and people are when fleing, if green plant the frame not be in place the board on, green plant the frame and be difficult to drop indoor subaerial, just produce green plant the frame easily and be thrown to outdoor risk.

Optionally, the window sash is arranged in a push-pull type up and down mode;

a support frame is fixed on one side of the outdoor wall body, a safety net is arranged on the support frame, and pull ropes are fixed at two ends of the safety net in the length direction;

second locking blocks are fixed at two ends of the fixed rod, and the two second locking blocks are in one-to-one corresponding locking connection with the two pull ropes;

the first locking block and the second locking block are located at the same straight line position.

Through adopting above-mentioned technical scheme, when the casement pushes up, the window will be opened, when someone is missing the foot and drops in the room, can catch the people through the safety net to after the safety net received the power, the stay cord will stimulate the second latch segment and rotate, thereby can rotate the bracing piece, can cut off the fixed rope through the cutter, green plant the frame will drop subaerial, will make a sound, so that in time rescue.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the fixing rod and the safety escape mechanism are arranged indoors, so that the clothes airing device is convenient to mount and maintain, and also can be convenient for people to air clothes and exercise bodies;

2. through the arrangement of the reinforcing component, the bending strength of the fixing rod can be reinforced, so that the effect of improving the safety is achieved;

3. through the setting of carriage, installation net, stay cord and second latch segment, can further play safety protection's effect.

Drawings

FIG. 1 is a schematic view of the overall construction of a window frame system in an embodiment of the present application;

FIG. 2 is an enlarged schematic view of portion A of FIG. 1;

FIG. 3 is a schematic structural diagram for embodying a reinforcement assembly in an embodiment of the present application;

FIG. 4 is an enlarged schematic view of the portion B of FIG. 3;

fig. 5 is an enlarged schematic view of the portion C in fig. 3.

Description of reference numerals: 1. a window frame body; 11. a window sash; 2. fixing the rod; 21. a first torsion spring; 3. a safe escape mechanism; 31. a support bar; 32. a first locking block; 321. a first fixing hole; 33. an arc-shaped hole; 34. a shielding plate; 35. a limiting block; 36. a limiting groove; 4. a reinforcement assembly; 41. buckling the plate; 411. rotating the rod; 4111. a second torsion spring; 412. a first connecting plate; 413. a second connecting plate; 414. a third connecting plate; 415. buckling the plate; 416. a first mounting hole; 417. mounting grooves; 418. placing the plate; 4181. a limiting edge; 419. a second mounting hole; 5. Fixing a rope; 6. a pulley block; 7. a cutter; 8. a green plant frame; 9. a support frame; 91. a safety net; 92. pulling a rope; 921. pulling a hook; 93. a second locking block; 931. and a second fixing hole.

Detailed Description

The present application is described in further detail below with reference to figures 1-5.

The embodiment of the application discloses a window frame with an escape handle. Referring to fig. 1, the window frame with the handle bar for escaping comprises a window frame body 1 and a window sash 11, wherein the window frame body 1 is fixedly installed on a wall body, and the window sash 11 is installed inside the window frame body 1 in a vertical push-pull mode. A fixed rod 2 is fixedly arranged on an indoor wall body, and a safety escape mechanism 3 is arranged on the fixed rod 2. A supporting frame 9 is fixed on the wall body positioned outdoors, so that people can use the supporting frame 9 to air clothes. When a fire disaster occurs in a high building, people can fix the safety rope on the safety escape mechanism 3 by using the fixing rod 2 and then escape through the safety rope.

Referring to fig. 2, the safety escape mechanism 3 includes a support bar 31. A plurality of first locking blocks 32 are distributed in the axial direction of the support rod 31, each first locking block 32 is fixed on the support rod 31, and the plurality of first locking blocks 32 are arranged in a straight line. The support rod 31 is rotatably inserted into the fixing rod 2, and two ends of the support rod 31 are rotatably inserted into the wall bodies at two ends of the window frame in the width direction in a one-to-one correspondence manner. The rotation of the support rod 31 and the installation between the support rod 31 and the fixing rod 2 are facilitated, and the sum of the length of the first locking block 32 and the diameter of the support rod 31 is 0.9 to 0.95 times of the inner diameter of the fixing rod 2. In this embodiment, the sum of the length of the first locking piece 32 and the diameter of the support rod 31 is 0.95 times the inner diameter of the fixing rod 2. Seted up a plurality of arc holes 33 in the axial of dead lever 2, every arc hole 33 is seted up along 2 circumference of dead lever, and in a plurality of first locking piece 32 one-to-one wore to locate arc hole 33, when dead lever 2 rotated, first locking piece 32 will move along the length direction in arc hole 33. In this embodiment, in order to facilitate the installation of the escape rope, a first fixing hole 321 is formed on the first locking block 32.

Referring to fig. 2, a shielding plate 34 is detachably arranged on the fixing rod 2 and in the arc hole 33, the shielding plate 34 is used for hiding the arc hole 33, and in life, sundries are not easy to fall into the arc hole 33. The baffle 34 is provided with a limiting block 35 towards the outdoor end, limiting grooves 36 are formed in the two sides of the fixing rod 2 located in the arc-shaped hole 33, and the limiting block 35 is clamped in the limiting grooves 36. In normal life, the shielding plate 34 is installed in the arc-shaped hole 33, and during escape, the shielding plate 34 is detached from the inside of the arc-shaped hole 33, and then the escape rope is fixed in the first fixing hole 321 of the first locking block 32, so that escape through the escape rope can be started.

Referring to fig. 3 and 4, the safety escape mechanism 3 further comprises a reinforcing component 4, the reinforcing component 4 comprises a pinch plate 41 and a driving part, and the pinch plate 41 comprises a rotating rod 411, a first connecting plate 412, a second connecting plate 413 and a third connecting plate 414 which are fixed in sequence. The rotating rod 411 is inserted into the wall body, and the first connecting plate 412, the second connecting plate 413 and the third connecting plate 414 form a v-21274h-shaped buckling plate 415. The longitudinal direction of the first connecting plate 412, the second connecting plate 413, and the third connection is the longitudinal direction of the fixing lever 2. Both ends at dwang 411 all are provided with second torsional spring 4111, and second torsional spring 4111 is when not atress, and buckling plate 415 card is located on dead lever 2 to buckling plate 415's opening sets up towards ground. In normal life, the second torsion spring 4111 is under stress, i.e., the opening of the fastening plate 415 faces away from the ground.

Referring to fig. 5, the third connection plate 414 has a plurality of mounting grooves 417 formed in a direction toward the second connection plate 413, and the mounting grooves 417 are distributed along a length direction of the third connection plate 414. The bottom of the mounting groove 417 is rotatably provided with a placing plate 418, two ends of one side of the placing plate 418, which is far away from the ground, are fixed with limiting ribs 4181, a green plant frame 8 is hung on the placing plate 418, and the green plant frame 8 is located between the two limiting ribs 4181.

Referring to fig. 4 and 5, a first mounting hole 416 is formed on a side of the third connection plate 414 away from the second connection plate 413, and an axial direction of the first mounting hole 416 coincides with a longitudinal direction of the rotation lever 411. The placing plate 418 is provided with a second mounting hole 419 at a side away from the second connecting plate 413, and the first mounting hole 416 and the second mounting hole 419 are coaxially arranged. The driving member is a fixing rope 5, the fixing rope 5 is inserted into the first mounting hole 416 and the second mounting hole 419, and one end of the fixing rope 5 extending out of the first mounting hole 416 is fixed to the other end of the rotating rod 411. The wall body and the two ends of the buckle plate 41 are provided with a plurality of groups of pulley blocks 6, and the parts of the fixing ropes 5 at the two ends of the first mounting holes 416 are sleeved on the pulley blocks 6 and used for pulling the third connecting plate 414, so that the opening of the buckling plate 415 can be arranged towards the direction far away from the ground. The two ends of the supporting rod 31 in the length direction are both fixedly provided with the cutters 7, and the cutting direction of the cutters 7 is consistent with the rotating direction of the supporting rod 31. The fixed rope 5 is positioned on the cutting track of the cutter 7, the supporting rod 31 is rotated to drive the cutter 7 to rotate, and the cutter 7 cuts the fixed rope 5.

Referring to fig. 4, the two ends of the supporting rod 31 are both provided with the first torsion springs 21, and when the first torsion springs 21 are not stressed, the second locking blocks 93 are located at one ends of the arc-shaped holes 33 facing the indoor space. When the first torsion spring 21 is not stressed, that is, when the support rod 31 is not rotated, and the fixing rope 5 is in a tightened state, a gap exists between the cutter 7 and the fixing rope 5. When the escape is carried out, the first locking block 32 is rotated, the supporting rod 31 drives the cutter 7 to rotate, after the cutter 7 cuts off the fixing rope 5, the fixing rope 5 loosens from the first mounting hole 416 and the second mounting hole 419, the placing plate 418 rotates, and the green plant frame 8 falls indoors. Then, the rotating rod 411 is driven to rotate by the resilience force of the second torsion spring 4111, so that the buckling plate 415 can be clamped on the fixing rod 2 to enhance the bending strength of the fixing rod 2.

Referring to fig. 3 and 4, the window sash 11 is arranged in a push-pull type in the up-down direction, so that escape and clothes drying during peace time are facilitated. Be provided with safety net 91 on carriage 9, if there is child to enjoy the play at home, perhaps when the sunning clothing, careless mistake falls, and people's safety can be protected to safety net 91, makes people be difficult to drop subaerial. A pull cord 92 is fixed to both ends of the safety net 91 in the longitudinal direction. The second locking blocks 93 are fixed at both ends of the fixing rod 2, and the first locking blocks 32 and the second locking blocks 93 are located at the same straight line position. Two second latch segments 93 and two stay cords 92 one-to-one locking connection, in this embodiment, have seted up second fixed orifices 931 on the second latch segments 93, are provided with the drag hook 921 at the one end of stay cord 92 towards second latch segments 93, and the drag hook 921 is worn to locate in second fixed orifices 931. When people air-cure clothes, the drag hook 921 is hooked on the support rod 31, so that the phenomenon that the support rod 31 is rotated by misoperation of people is reduced, and the fixing rope 5 is cut off.

The implementation principle of the window frame with the escape handle bar in the embodiment of the application is as follows:

when a fire breaks out in a tall building, first, the end of the escape rope is fixed to the first locking block 32, and a plurality of escape ropes can be used simultaneously in order to enhance the firmness. The escape ropes are correspondingly fixed on the first locking blocks 32. Secondly, people utilize the rope of fleing to flee, when the rope of fleing received the effect of power, first locking piece 32 will receive the effect of gravity, first locking piece 32 will move along the length direction of arc hole 33, bracing piece 31 will rotate along with first locking piece 32, when bracing piece 31 rotates, drive cutter 7 and rotate, when cutter 7 rotates, will fix rope 5 and cut off, after fixing rope 5 cuts off, fix rope 5 will be in lax phenomenon in the first mounting hole 416 of first mounting hole 416. The fixing string 5 is loosened from the first and second mounting

holes

416 and 419, the placing plate 418 is rotated, and the green plant frame 8 is dropped into the room. Then because the resilience force of the second torsion spring 4111 drives the rotating rod 411 to rotate, the buckling plate 415 can be clamped on the fixing rod 2 to enhance the bending strength of the fixing rod 2, so that people can escape more safely.

In normal life, if there is the heavy object when exerting pressure to safety net 91, if, when someone dropped on safety net 91, stay cord 92 will stimulate second latch segment 93 and rotate to can rotate bracing piece 31, can cut off fixed rope 5 through cutter 7, green frame 8 of planting will drop subaerial, will make a sound, so that in time rescue.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. Window frame with flee and use barre, including window frame body (1) and install in window frame body (1) inside casement (11), window frame body (1) fixed mounting is on the wall body, its characterized in that: a fixed rod (2) and a safe escape mechanism (3) arranged on the fixed rod (2) are arranged on an indoor wall body.

2. The window frame with the escape pole of claim 1, wherein: mechanism (3) of fleing safely includes bracing piece (31) and sets up in a plurality of first locking piece (32) that bracing piece (31) axial is used for locking the rope of fleing, bracing piece (31) rotate wear to locate in dead lever (2), a plurality of arc holes (33) have been seted up on dead lever (2), and is a plurality of first locking piece (32) one-to-one wears to locate in arc hole (33), is located and is provided with on the indoor wall body and is used for improving the reinforcement subassembly (4) of dead lever (2) bending strength.

3. The window frame with the escape bar of claim 2, wherein: the reinforcing assembly (4) comprises a pinch plate (41) and a driving piece, the pinch plate (41) is rotatably arranged on an indoor wall body and is positioned between the fixed rod (2) and the ground, the length direction of the pinch plate (41) is the length direction of the fixed rod (2), and the pinch plate (41) is Contraband-shaped;

the driving piece is arranged on the pinch plate (41) and is used for driving the pinch plate (41) to rotate;

when the escape buckle is used, the opening of the buckle plate (41) faces to the direction far away from the ground;

when the buckle plate is used normally in life, the buckle plate (41) is clamped on the fixing rod (2), and the opening of the buckle plate (41) faces the ground.

4. The window frame with the escape bar of claim 3, wherein: the pinch plate (41) comprises a rotating rod (411), a first connecting plate (412), a second connecting plate (413) and a third connecting plate (414) which are fixed in sequence;

the rotating rod (411) is inserted into a wall body, and the first connecting plate (412), the second connecting plate (413) and the third connecting plate (414) form a v-21274h-shaped buckling plate (415);

a first mounting hole (416) is formed in one side, away from the second connecting plate (413), of the third connecting plate (414), and the axial direction of the first mounting hole (416) is consistent with the length direction of the rotating rod (411);

the driving piece is a fixed rope (5), one end of the fixed rope (5) is fixed at one end of the rotating rod (411), the fixed rope (5) penetrates through the first mounting hole (416), and one end, extending out of the first mounting hole (416), of the fixed rope (5) is fixed at the other end of the rotating rod (411);

the wall body is provided with a plurality of groups of pulley blocks (6), the fixed rope (5) is sleeved on the pulley blocks (6), two ends of the supporting rod (31) in the length direction are provided with cutters (7), the cutters (7) are arranged towards the fixed rope (5), and the rotating direction of the supporting rod (31) is the direction in which the cutters (7) cut the fixed rope (5);

both ends of dwang (411) all are provided with second torsional spring (4111), when fixed rope (5) are in the state of tightening, there is the clearance between cutter (7) and fixed rope (5).

5. The window frame with the escape pole of claim 4, wherein: a plurality of mounting grooves (417) are formed in the third connecting plate (414) in the direction towards the second connecting plate (413), and the mounting grooves (417) are distributed along the length direction of the third connecting plate (414);

the bottom of the mounting groove (417) is rotatably provided with a placing plate (418), one side of the placing plate (418) far away from the second connecting plate (413) is provided with a second mounting hole (419), the fixing rope (5) penetrates through the second mounting hole (419), and the placing plate (418) is hung with a green plant frame (8).

6. The window frame with the escape bar of claim 2, wherein: the fixing rod (2) is provided with a baffle plate (34) in the arc-shaped hole (33), one end of the baffle plate (34) facing the outdoor is provided with a limiting block (35), two sides of the fixing rod (2) in the arc-shaped hole (33) are provided with limiting grooves (36), and the limiting block (35) is clamped in the limiting grooves (36).

7. The window frame with the escape bar of claim 2, wherein: the sum of the length of the first locking block (32) and the diameter of the support rod (31) is 0.9 to 0.95 times of the inner diameter of the fixed rod (2).

8. The window frame with the escape bar of claim 5, wherein: the two ends of one side, far away from the ground, of the placing plate (418) are fixedly provided with limiting ribs (4181), and the green plant frame (8) is located between the two limiting ribs (4181).

9. The window frame with the escape bar of claim 2, wherein: the window sash (11) is arranged to be pushed and pulled up and down;

a supporting frame (9) is fixed on one side of the outdoor wall, a safety net (91) is arranged on the supporting frame (9), and pull ropes (92) are fixed at two ends of the safety net (91) in the length direction;

two ends of the fixed rod (2) are respectively fixed with a second locking block (93), and the two second locking blocks (93) are in one-to-one corresponding locking connection with the two pull ropes (92);

the first locking block (32) and the second locking block (93) are located at the same straight line position.