CN115075595B

CN115075595B - Protective net for building

Info

Publication number: CN115075595B
Application number: CN202210880814.3A
Authority: CN
Inventors: 刘雨芬
Original assignee: Xuzhou Yike New Wall Materials Co ltd
Current assignee: Xuzhou Yike New Wall Materials Co ltd
Priority date: 2022-07-26
Filing date: 2022-07-26
Publication date: 2022-11-22
Anticipated expiration: 2042-07-26
Also published as: CN115075595A

Abstract

The invention discloses a protective net for a building, and relates to the field of buildings. The protective net for the building comprises a supporting frame which is obliquely arranged, wherein two sides of the supporting frame are respectively provided with a supporting seat; a plurality of net rope units are arranged in the supporting frame in multiple rows and multiple columns; each net rope unit comprises two oppositely arranged spiral rod groups; the screw rod group comprises two first screw rods which are symmetrically arranged, the outer parts of the two first screw rods are respectively wrapped with one second screw rod, and the two second screw rods are symmetrically arranged. The invention has obvious effects of slowing and intercepting falling objects and can greatly reduce the impact rebound of the falling objects in the horizontal direction.

Description

Protective net for building

Technical Field

The invention relates to the technical field of buildings, in particular to a protective net for buildings.

Background

In the field of buildings, particularly in places with dense pedestrians, a protective net is usually arranged outside the building for protecting the pedestrians or surrounding buildings from falling down due to falling objects; however, the existing protective net mostly adopts a woven net with a plate surface structure, when a falling object falls and collides with the protective net, the falling object is easy to rebound in the horizontal direction due to different angles and impacts of the falling object, and therefore the falling object is easy to rebound to cause injury to buildings or building workers.

Disclosure of Invention

The invention aims to provide a protective net for buildings, which has obvious clamping and friction effects on a falling object in the horizontal direction and is convenient for slowing down the rebound effect of the falling object in the horizontal direction; meanwhile, the impact of falling objects is conveniently slowed down, and the falling objects can slowly slide or roll down.

In order to solve the technical problems, the invention provides the following technical scheme: a protective screening for buildings comprises a supporting frame which is obliquely arranged, wherein two sides of the supporting frame are respectively provided with a supporting seat; a plurality of net rope units are arranged in the supporting frame in a plurality of rows and a plurality of columns; each net rope unit comprises two spiral rod groups which are oppositely arranged; the screw rod group comprises two first screw rods which are symmetrically arranged, a second screw rod is respectively coated outside the two first screw rods, and the two second screw rods are symmetrically arranged; first spiral sleeves are sleeved outside the two first spiral rods, and second spiral sleeves are sleeved outside the two second spiral rods; a plurality of first rope rings uniformly distributed along the length of the first spiral sleeves are sleeved outside the two first spiral sleeves respectively; a plurality of second rope rings uniformly distributed along the length of the second spiral sleeves are sleeved outside the two second spiral sleeves respectively; the number of the first rope ring is equal to that of the second rope ring, and the first rope ring and the second rope ring correspond to each other in position; elastic rope assemblies are connected between the first rope ring on each first spiral sleeve and the corresponding second rope ring on the second spiral sleeve outside the first spiral sleeve, and a plurality of elastic rope assemblies between each first spiral sleeve and the corresponding second spiral sleeve are arranged in a spiral array; the first spiral rod and the second spiral rod are obliquely arranged, the bottom end of each of the first spiral rod and the second spiral rod is respectively connected with a fixed rod, the fixed rods are jointly and vertically connected with a fixed frame, and the fixed frame is arranged in the supporting frame; the four second spiral sleeves in each net rope unit are provided with a first rope net in an area formed by clamping the parts, close to the fixing rod, of the four second spiral sleeves, and the four sides of the first rope net are connected to the four second spiral sleeves respectively.

Furthermore, two second rope nets are further arranged between two opposite spiral rod groups in the net rope unit and are respectively positioned on two sides, far away from the fixed rod, of the first rope net; a second rope net is also arranged between two second spiral sleeves in each spiral rod group.

Furthermore, a plurality of first rope rings on two first spiral sleeves in each spiral rod group respectively correspond to one another, and an elastic rope assembly is arranged between each first rope ring close to the upper part of one of the first spiral sleeves and the corresponding first rope ring on the other first spiral sleeve.

Furthermore, the elastic rope assembly comprises a first elastic rope, two first protection ropes are wound outside the first elastic rope, and spiral winding is formed between the two first protection ropes.

Further, the first cord net is formed by weaving a plurality of warp cords and a plurality of weft cords.

Furthermore, the second rope net comprises a plurality of second elastic ropes which are uniformly distributed in parallel, and two ends of each second elastic rope are respectively fixed on the outer walls of the corresponding second spiral sleeves; two strands of second protection ropes are respectively wound outside each second elastic rope, and the two second protection ropes are spirally wound.

Furthermore, the supporting frame comprises a supporting frame body and a protection plate arranged in the supporting frame body; the inside protection dictyosome that still is provided with of braced frame, the protection dictyosome is located the guard plate and is close to one side of dead lever.

Furthermore, a conical net cylinder is sleeved outside each fixed rod; each conical net cylinder top is connected at the bottom end of the corresponding second spiral sleeve, and each conical net cylinder bottom is connected on the protection net body.

Furthermore, the supporting frame body and the fixed frame are arranged in parallel, the supporting frame body and the fixed frame are both obliquely arranged, and an included angle between the supporting frame and the vertical direction is 15-20 degrees.

Compared with the prior art, the invention has the following beneficial effects.

1. The net rope units are arranged in a plurality of rows and columns and are obliquely arranged; through a plurality of elastic rope subassemblies be convenient for hold back the thing that weighs down, slow down the thing impact that weighs down, be convenient for especially carry out centre gripping friction to the thing that weighs down in the horizontal direction, effectively prevent the bounce-back of the thing that weighs down.

2. Through the formed spiral guide channel, the falling object can be guided to roll or slide conveniently, and the clamping and buffering effects on the falling object are improved.

3. The falling object can fall slowly through the formed opening; meanwhile, the trapped falling objects are convenient to clean and discharge.

4. Still be provided with protection dictyosome and guard plate, realize the secondary and block the protection, slow down the effect that the thing strikes that weighs down.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a schematic view of the installation of the support frame and the protective net body of the invention.

Fig. 3 is a schematic view of the construction of a net-rope unit according to the invention.

Fig. 4 is another view structure diagram of the net rope unit of the present invention.

Fig. 5 is a schematic view of the installation of the first and second screw inserts of the present invention.

Fig. 6 is a schematic view showing the installation of the first screw rod and the second screw rod according to the present invention.

Fig. 7 is a schematic view of the installation of the first netting of the present invention.

FIG. 8 is a schematic representation of the construction of the elastic cord assembly of the present invention.

Fig. 9 is a schematic view of the connection of the second elastic cord with the second protection cord according to the present invention.

Fig. 10 is a schematic view of the connection of the protective net body and the conical net barrel.

Fig. 11 is a schematic layout of four net-rope units according to the invention.

In the figure: 1. a supporting seat; 2. a support frame; 21. a support frame body; 22. a protection plate; 3. a net rope unit; 31. a screw group; 311. a first screw rod; 3111. a first helical casing; 3112. a first cord loop; 312. a second screw rod; 3121. a second helical casing; 3122. a second cord loop; 313. an elastic cord assembly; 3131. a first elastic cord; 3132. a first protective rope; 314. fixing the rod; 32. a first net; 321. a warp cord; 322. weft thread; 33. a second net; 331. a second elastic cord; 332. a second protective rope; 34. a fixing frame; 35. a conical mesh cylinder; 4. a figure-of-eight region; 5. an opening; 6. a helical guide channel; 7. a protective net body.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-2, the present invention provides a technical solution: a protective net for buildings comprises two supporting seats 1, a supporting frame 2 is arranged between the two supporting seats 1, the supporting frame 2 is obliquely arranged, and the included angle between the supporting frame 2 and the vertical direction is 15-20 degrees; a plurality of net rope units 3 are arranged in the supporting frame 2, and the net rope units 3 are arranged in multiple rows and multiple columns; the net rope units 3 are four in number and arranged in two rows and two columns as shown in fig. 1.

Referring to fig. 3-7, the net rope unit 3 includes two opposite spiral rod sets 31, each spiral rod set 31 includes two first spiral rods 311 symmetrically disposed, that is, the net rope unit 3 has four first spiral rods 311 symmetrically disposed, the first spiral rods 311 are made of metal material with relatively high hardness, and the rod diameter can be set to be relatively small; the two first spiral rods 311 are externally wrapped with one second spiral rod 312 respectively, and the two second spiral rods 312 are also symmetrically arranged; the net-cord unit 3 thus also has four mutually symmetrical second spiral rods 312.

A first spiral sleeve 3111 is sleeved outside each of the two first spiral rods 311, and a second spiral sleeve 3121 is sleeved outside each of the two second spiral rods 312; the first spiral sleeve 3111 is adapted to the first spiral rod 311, and the second spiral sleeve 3121 is adapted to the second spiral rod 312, that is, the first spiral sleeve 3111 and the second spiral sleeve 3121 are both spiral and made of elastic material, specifically, rubber material; the top end of the first screw sleeve 3111 (i.e. the end of the first screw sleeve 3111 away from the support frame 2) extends out of the top end of the first screw rod 311 (i.e. the end of the first screw rod 311 away from the support frame 2), and the extended part is solid; meanwhile, the top end of the second spiral housing 3121 (i.e., the end of the second spiral housing 3121 far from the support frame 2) extends out of the top end of the second spiral rod 312 (i.e., the end of the second spiral rod 312 far from the support frame 2), and the extended part is provided as a solid body.

After the top ends of the first spiral sleeve 3111 and the second spiral sleeve 3121 are set to be solid, when the weight directly collides with the top ends of the first spiral sleeve 3111 and the second spiral sleeve 3121, the first spiral sleeve 3111 or the second spiral sleeve 3121 is directly extruded to be deformed and bent, so that the weight can be guided to the area between the first spiral sleeve 3111 and the second spiral sleeve 3121.

A plurality of first rope rings 3112 are respectively sleeved outside two first spiral casings 3111 in the same spiral rod group 31, the first rope rings 3112 are fixedly connected with the first spiral casings 3111, the plurality of first rope rings 3112 outside each first spiral casing 3111 are respectively and uniformly distributed along the length of the first spiral casing 3111, and the distance between two adjacent first spiral casings 3111 can be set to be small; meanwhile, a plurality of second rope loops 3122 are sleeved outside two second spiral casings 3121 in the same spiral rod group 31, the second rope loops 3122 are fixedly connected with the second spiral casings 3121, and the plurality of second rope loops 3122 on each second spiral rod 312 are respectively and uniformly arranged along the length of the second spiral casings 3121; the number of the first rope ring 3112 on each first spiral sleeve 3111 is equal to that of the second rope ring 3122 on each second spiral sleeve 3121, and the positions of the first rope rings are corresponding to each other; an elastic rope assembly 313 is connected between the first rope ring 3112 of each first spiral sleeve 3111 and the corresponding second rope ring 3122 of the second spiral sleeve 3121 outside the first spiral sleeve 3111, and a plurality of elastic rope assemblies 313 between each first spiral sleeve 3111 and the second spiral sleeve 3121 outside the first spiral sleeve are arranged in a spiral array.

Through establish a plurality of first becket bridle 3112 at first helical casing 3111 outer wall cover, and establish a plurality of second becket bridle 3122 at second helical casing 3121 outer wall cover, be used for playing certain guard action to first helical casing 3111 and second helical casing 3121 on the one hand, on the other hand is used for weighing down the friction of thing and slowing down.

And after setting up a plurality of elastic rope subassemblies 313 that are the spiral array and arrange, the elastic rope subassembly 313 of a plurality of spiral arrays forms a spiral type guide way 6, when weighing down the thing and contacting on the elastic rope subassembly 313 between corresponding first spiral shell 3111, second spiral shell 3121, when cushioning the thing that weighs down, also be convenient for guide the thing that weighs down slowly along the spiral type guide way 6 whereabouts that forms.

First hob 311, second hob 312 are the slope setting, and the bottom of each first hob 311, second hob 312 is connected with a dead lever 314 respectively, and a fixed frame 34 is connected perpendicularly jointly to each dead lever 314, and fixed frame 34 is located in braced frame 2.

As shown in fig. 7, the four second turnbuckles 3121 of each net cord unit 3 are clamped near the fixing rod 314 to form a diamond-like area, which is provided with the first cord net 32, and four sides of the first cord net 32 are respectively connected to the four second turnbuckles 3121; the first rope net 32 is formed by weaving a plurality of warp ropes 321 and a plurality of weft ropes 322, the lengths of the plurality of warp ropes 321 and the plurality of weft ropes 322 decrease from the middle part to two sides, and the warp ropes 321 and the weft ropes 322 can adopt elastic ropes.

In addition, two second rope nets 33 are arranged between two opposite spiral rod groups 31 in each net rope unit 3, and the two second rope nets 33 are respectively positioned at two sides of the first rope net 32 between the two spiral rod groups 31, which are far away from the fixed rod 314; meanwhile, a second rope net 33 is connected between two second turnbuckles 3121 in the screw rod group 31, and the second rope net 33 is located in the splayed area 4 formed between the connecting turnbuckles (see fig. 3 and 5).

Meanwhile, a plurality of first rope rings 3112 on two first turnbuckles 3111 in each screw rod group 31 are respectively in one-to-one correspondence, and an elastic rope component 313 is also arranged between each first rope ring 3112 close to the upper part of the first turnbuckle 3111 and the corresponding first rope ring 3112 on the other first turnbuckle 3111; as shown in fig. 4 and 5, in each of the net rope units 3, the region between the two first spiral housings 3111 and close to the fixing rod 314 is not provided with the elastic rope assembly 313, and the two corresponding first spiral housings 3111, the elastic rope assembly 313 between the two first spiral housings 3111 and closest to the fixing rod 314 and the fixing frame 34 are sandwiched to form an opening 5, which facilitates the falling or rolling of the falling objects or the timely cleaning and discharging of the trapped falling objects; that is, each net rope unit 3 has two openings 5, and the two openings 5 are oriented in the vertical direction, and the two openings 5 are located on two sides of the first rope net 32; since the supporting frame 21 is obliquely arranged and the whole net rope unit 3 is also obliquely arranged, when the falling object falls on the area of the first rope net 32 or the plurality of elastic rope assemblies 313 between the two first spiral sleeves 3111 on one side of the first rope net 32, the plurality of elastic rope assemblies 313 on both sides of the first rope net 32 have a blocking effect on the falling object in the horizontal direction, so that the impact rebound of the falling object in the horizontal direction is also reduced; moreover, when the falling object falls on the net rope unit 3 positioned at the upper part of the whole protective net for the building, the falling object rolls from the corresponding opening 5, and the falling object can conveniently roll on the net rope unit 3 below the opening 5, so that the falling object can slowly roll, and the impact of the falling object on the ground is reduced.

Referring to fig. 8, the elastic cord assembly 313 includes a first elastic cord 3131, the first elastic cord 3131 is in a relaxed state, i.e., not stretched straight, two first protection cords 3132 are wound around the first elastic cord 3131, the two first protection cords 3132 are spirally wound, two ends of the two first protection cords 3132 are respectively close to two ends of the first elastic cord 3131, and the two first protection cords 3132 are fixed on the first elastic cord 3131; the provision of two strands of cord wrapped around the first elastic cord 3131 enhances the overall tensile strength on the one hand and allows for the formation of a plurality of grooves between the two strands of protective cord on the other hand.

When a falling object falls onto the spiral guide channel 6, the elastic rope assembly 313 buffers and decelerates the falling object, meanwhile, the falling object extrudes the elastic rope assembly 313 to deform downwards, a V-shaped state is convenient to form, two sides of the falling object are extruded and rubbed, as the two strands of first protection ropes 3132 which are mutually wound form a plurality of grooves, the grooves are convenient to increase the friction effect with the two sides of the falling object, and as the first elastic ropes 3131 are in a loose state, the falling object is convenient to be trapped on the net rope unit 3 or the rebound effect of the falling object in the horizontal direction is greatly reduced, and the falling object is prevented from injuring surrounding buildings or people; the spiral type guide channel 6 that forms simultaneously is itself exactly to be spiral lift, compares the net rope of plane state, realizes falling object both sides centre gripping friction effect more obvious after the contact of falling object, further reduces the rebound effect of falling object on the horizontal direction, has still realized the certain guide effect to falling object in addition.

Referring to fig. 9, the second rope net 33 includes a plurality of second elastic ropes 331, the plurality of second elastic ropes 331 are uniformly distributed in parallel, and two ends of the second elastic ropes 331 are respectively fixed on outer walls of the corresponding second spiral sleeves 3121; two strands of the second protection string 332 are respectively wound on the outside of each second elastic string 331, and the two second protection strings 332 are spirally wound.

Referring to fig. 2 and fig. 10 again, the supporting frame 2 includes a supporting frame 21 and a protection plate 22 disposed inside the supporting frame 21, the fixing frame 34 is specifically disposed on the protection plate 22, and the protection plate 22 is made of a buffer board material, which may be a polyurethane board; a protective net body 7 is further arranged in the supporting frame body 21, the protective net body 7 is arranged on one side, close to the fixing rods 314, of the protective plate 22, and each fixing rod 314 penetrates through the protective net body 7; a conical net cylinder 35 is sleeved outside each fixing rod 314, and the conical net cylinder 35 is formed by weaving a rope body; each toper net section of thick bamboo 35 top is connected at corresponding second spiral cover 3121 bottom, its bottom is connected on protection net body 7, and toper net section of thick bamboo 35 is used for the protection to each dead lever 314, prevents the collision of the weight that drops and dead lever 314.

The protection plate 22 is arranged in parallel with the support frame 21, namely, obliquely arranged; the protective net body 7 and the protective plate 22 are arranged in parallel, and a certain distance is formed between the protective net body and the protective plate; the protective net body 7 is also woven by elastic ropes, and the protective net body 7 and the protective plate 22 are used for secondary blocking protection and slowing down the impact of falling objects; further, as shown in fig. 11, the net rope structure is provided in the region between the four net rope units 3, thereby achieving an all-round protective effect.

The working principle is as follows: the protective net is provided with a plurality of net rope units 3 which are arranged in a plurality of rows and a plurality of columns, four first spiral sleeves 3111 of the net rope units 3 are symmetrically arranged relatively, four second spiral sleeves 3121 are symmetrically arranged mutually, elastic rope components 313 which are uniformly distributed in a spiral manner are arranged between the four first spiral sleeves 3111 and the corresponding second spiral sleeves 3121 respectively, and a plurality of elastic rope components 313 which are uniformly distributed in a spiral manner form a spiral guide channel 6 which can guide falling pulleys or roll off conveniently; meanwhile, since the elastic string assembly 313 includes the first elastic string 3131 and two strands of the first protection string 3132 wound around the outside of the first elastic string 3131, a plurality of grooves are formed between the two strands of the protection string; when a falling object falls to the area of the spiral guide channel 6, the elastic rope assembly 313 buffers and decelerates the falling object, meanwhile, the falling object extrudes the elastic rope assembly 313 to deform downwards, a V-shaped state is convenient to form, two sides of the falling object are extruded and rubbed, as the two strands of first protection ropes 3132 which are mutually wound form a plurality of grooves, the grooves are convenient to increase the friction effect with the two sides of the falling object, and as the first elastic ropes 3131 are in a loose state, the falling object is convenient to be trapped on the net rope unit 3 or the rebound effect of the falling object in the horizontal direction is greatly reduced, and the falling object is prevented from injuring surrounding buildings or people; the spiral type guide channel 6 that forms simultaneously is itself exactly to be spiral lift, compares the net rope of plane state, realizes falling object both sides centre gripping friction effect more obvious after the contact of falling object, further reduces the rebound effect of falling object on the horizontal direction, has still realized the certain guide effect to falling object in addition.

Meanwhile, because the openings 5 are provided, each net rope unit 3 has two openings 5, the two openings 5 are oriented in the vertical direction, and the two openings 5 are located at two sides of the first rope net 32, and meanwhile, the four second spiral sleeves 3121 in each net rope unit 3 are clamped near the fixing rod 314 to form a diamond-like area in which the first rope net 32 is arranged; therefore, when falling objects fall into the spiral guide channel 6 or the first rope net 32 area, the opening 5 can facilitate the falling objects to roll or slide, and meanwhile, the trapped falling objects can be driven to be cleaned and discharged in time through the opening 5; since the supporting frame 21 is obliquely arranged and the whole net rope unit 3 is also obliquely arranged, when the falling object falls on the area of the first rope net 32 or the plurality of elastic rope assemblies 313 between the two first spiral sleeves 3111 on one side of the first rope net 32, the plurality of elastic rope assemblies 313 on both sides of the first rope net 32 have a blocking effect on the falling object in the horizontal direction, so that the impact rebound of the falling object in the horizontal direction is also reduced; moreover, when falling objects fall on the net rope unit 3 positioned at the upper part and fall from the corresponding opening 5, the falling objects conveniently fall on the net rope unit 3 at the lower part, so that the falling objects can slowly fall, and the impact of the falling objects on the ground is reduced; when the falling object directly touches the tops of the first spiral sleeve 3111 and the second spiral sleeve 3121, the top end parts of the first spiral sleeve 3111 and the second spiral sleeve 3121 are solid, and when the falling object directly collides the top ends of the first spiral sleeve 3111 and the second spiral sleeve 3121, the first spiral sleeve 3111 or the second spiral sleeve 3121 is directly extruded to deform and bend, so that the falling object is conveniently guided to the peripheral sides of the first spiral sleeve 3111 and the second spiral sleeve 3121; in addition, a protective net and a protective plate 22 are further arranged, so that the secondary effects of blocking protection and slowing down the impact of falling objects are achieved.

It should be noted that, in this document, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described above, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A protective net for buildings is characterized in that: comprises a supporting frame (2) which is obliquely arranged, wherein two sides of the supporting frame (2) are respectively provided with a supporting seat (1); a plurality of net rope units (3) are arranged in the supporting frame (2), and the net rope units (3) are arranged in multiple rows and multiple columns;

each net rope unit (3) comprises two oppositely arranged spiral rod groups (31);

the screw rod group (31) comprises two first screw rods (311) which are symmetrically arranged, a second screw rod (312) is respectively coated outside the two first screw rods (311), and the two second screw rods (312) are symmetrically arranged;

a first spiral sleeve (3111) is sleeved outside each of the two first spiral rods (311), and a second spiral sleeve (3121) is sleeved outside each of the two second spiral rods (312);

a plurality of first rope rings (3112) uniformly distributed along the length of the first spiral sleeve are sleeved outside the two first spiral sleeves (3111) respectively;

a plurality of second rope rings (3122) which are uniformly distributed along the length of the second spiral sleeve are respectively sleeved outside the two second spiral sleeves (3121);

the number of the first rope ring (3112) is equal to that of the second rope ring (3122), and the positions of the first rope ring and the second rope ring are corresponding;

an elastic rope component (313) is connected between a first rope ring (3112) on each first spiral casing (3111) and a corresponding second rope ring (3122) on a second spiral casing (3121) outside the first spiral casing (3111), and a plurality of elastic rope components (313) between each first spiral casing (3111) and the corresponding second spiral casing (3121) are arranged in a spiral array;

the first spiral rod (311) and the second spiral rod (312) are obliquely arranged, the bottom end of each of the first spiral rod (311) and the second spiral rod (312) is connected with a fixing rod (314), each fixing rod (314) is vertically connected with a fixing frame (34) together, and the fixing frames (34) are arranged in the supporting frame (2);

the four second spiral sleeves (3121) in each net rope unit (3) are provided with a first rope net (32) at the area formed by the part which is close to the fixed rod (314), and the four sides of the first rope net (32) are respectively connected with the four second spiral sleeves (3121).

2. A protective net for building according to claim 1, characterised in that: two second rope nets (33) are further arranged between two opposite spiral rod groups (31) in the net rope unit (3), and the two second rope nets (33) are respectively positioned at two sides, far away from the fixing rod (314), of the corresponding first rope net (32);

a second rope net (33) is also arranged between the two second turnbuckles (3121) in each screw rod group (31).

3. A protective net for buildings according to claim 1, characterized in that: a plurality of first rope rings (3112) on two first spiral casings (3111) in each spiral rod group (31) respectively correspond one to one, and an elastic rope component (313) is also arranged between each first rope ring (3112) close to the upper part of one of the first spiral casings (3111) and the corresponding first rope ring (3112) on the other first spiral casing (3111).

4. A protective net for building according to claim 3, characterised in that: the elastic rope assembly (313) comprises a first elastic rope (3131), two strands of first protection ropes (3132) are wound outside the first elastic rope (3131), and a spiral winding is formed between the two strands of first protection ropes (3132).

5. A protective net for buildings according to claim 1, characterized in that: the first cord net (32) is woven from a plurality of warp cords (321) and a plurality of weft cords (322).

6. A protective net for buildings according to claim 2, characterized in that: the second rope net (33) comprises a plurality of second elastic ropes (331), the second elastic ropes (331) are uniformly distributed in parallel, and two ends of each second elastic rope (331) are respectively fixed on the outer walls of the corresponding second spiral sleeves (3121);

two strands of second protection ropes (332) are respectively wound on the outer part of each second elastic rope (331), and the two second protection ropes (332) are spirally wound.

7. A protective net for building according to claim 1, characterised in that: the supporting frame (2) comprises a supporting frame body (21) and a protection plate (22) arranged in the supporting frame body (21); the supporting frame body (21) is internally provided with a protective net body (7), and the protective net body (7) is arranged on one side, close to the fixing rod (314), of the protective plate (22).

8. A protective net for buildings according to claim 7, characterized in that: a conical net barrel (35) is sleeved outside each fixing rod (314); each toper net section of thick bamboo (35) top is connected at corresponding second spiral shell (3121) bottom, and each toper net section of thick bamboo (35) bottom is connected on protection dictyosome (7).

9. A protective net for buildings according to claim 7, characterized in that: the supporting frame body (21) and the fixed frame (34) are arranged in parallel, the supporting frame body (21) and the fixed frame (34) are arranged in an inclined mode, and the included angle between the supporting frame (2) and the vertical direction is 15-20 degrees.