Windproof door bucket

Abstract

The utility model relates to the technical field of door buckets, and particularly discloses a windproof door bucket which adopts a square metal stand column as a main support, the top of the door bucket is provided with a UPVC cantilever outrigger, an inner stainless steel pipe cross rod and an outer stainless steel pipe cross rod are fixed on the UPVC cantilever outrigger to form a stress frame, a PVC soft film ceiling is covered, the structural rigidity is enhanced through the skin effect, and the end part of the cantilever outrigger is supported by an L-shaped corner post. A transparent thickened PVC openable door curtain is arranged on the outer side of the door bucket, a counterweight plate is arranged on the lower portion of the door bucket, and the door bucket can be automatically closed and block airflow through connection of self-attraction magnetic strips. The windproof door bucket is suitable for regions with various climates, building entrances are temporarily transformed in winter and summer, energy consumption is reduced, and passing of people is facilitated; and the device can be detached and stored in spring and autumn and can be repeatedly used. And when being limited, the device can be reversely arranged on the inner side of the entrance. And the device can be combined with a large-area transparent windproof door curtain to solve the energy-saving problem of shops.

Description

Technical Field

[0001] This utility model relates to the field of vestibule technology, specifically to a windproof vestibule. Background Technology

[0002] Installing windproof vestibules at building entrances is an effective way to resist cold and sandstorms and protect indoor spaces from adverse weather conditions. Because a windproof vestibule serves as a transitional space between the indoor and outdoor environments, with the inner and outer doors (curtains) not opening simultaneously, the "wind gate" formed by the vestibule effectively blocks the impact of harsh outdoor weather, improving indoor comfort. By preventing direct intrusion of outdoor winds, it reduces indoor heat (or cold) loss, thereby lowering the energy consumption of heating (or cooling) equipment and achieving energy conservation and emission reduction goals.

[0003] However, the use of windproof vestibules at building entrances with energy-saving requirements is not widespread; most buildings use flat windbreak curtains with poor windproof performance. Especially in public places with high traffic flow, such as shopping malls and restaurants, the windbreak curtains cannot be kept closed due to the constant flow of people, resulting in frequent exchange of hot and cold air between indoors and outdoors, which greatly weakens their windproof and heat-insulating (cold-insulating) functions.

[0004] Traditional windproof vestibules are typically planned and installed during the building design phase. For shopping malls, restaurants, and other public service venues that were not originally designed with vestibules, adding them is cumbersome and requires significant space at the entrance. More importantly, vestibules are only truly useful in winter (northern regions) or summer (southern regions). During spring and autumn, when natural ventilation is crucial, vestibules become unnecessary and can even hinder pedestrian flow and ventilation. This explains why windproof vestibules, despite their energy efficiency, are not a year-round necessity and are not widely adopted in practice.

[0005] Therefore, a windproof vestibule that is easy to construct, cost-effective, and easy to disassemble has become an urgent problem to be solved. Utility Model Content

[0006] The technical problem to be solved by this utility model is to provide a windproof vestibule with a stable structure and convenient installation. It can effectively block external wind and dust, and improve the windproof, dustproof and heat insulation performance of building entrances and exits.

[0007] To solve the above-mentioned technical problems, the technical solution provided by this utility model is as follows: a windproof vestibule, including metal columns, cantilever beams, inner crossbars, outer crossbars, corner posts, a canopy, and a door curtain. The components cooperate with each other to form a stable windproof structure.

[0008] The metal columns are fixed to the side closest to the building, with their tops connected to the building via angle steel anchors and their bottoms connected to the ground via bases. The metal columns are made of aluminum alloy or steel square tubing, and their tops are secured to the floor slab, lintel, or wall above them using angle steel anchors to ensure a strong connection. The bases are made of UPVC and are bonded to the ground using elastic double-sided adhesive, further secured with silicone sealant to improve the stability of the connection between the base and the ground.

[0009] The cantilever beams are fixed to the metal columns using sleeves and bolts, with a sloping top and flat bottom. Two metal columns are used, each connected to one cantilever beam. The cantilever beams are made of UPVC and are symmetrically positioned on either side of the door. Each cantilever beam consists of a web and a lower hanging plate, which are integrally formed. Flanges extending to both sides are provided at the connection between the web and the lower hanging plate, as well as at the top of the web. A sleeve is provided at one end of the web and the lower hanging plate, and a slot is provided at the opposite end. A semi-circular support for fixing the inner crossbar is provided on the surface of the sleeve, and a circular support for fixing the outer crossbar is provided on the web above the slot.

[0010] Both the inner and outer crossbars are fixed to the crossbar supports of the cantilever beams with screws. The inner and outer crossbars are arranged parallel to each other, forming a load-bearing structural frame for the roof together with the two cantilever beams. Both the inner and outer crossbars are made of stainless steel tubing to ensure their strength and durability.

[0011] The canopy covers the top of the load-bearing structural frame. Its left and right sides are fixed to the cantilever beams using metal clamps, while the front and back sides are adhered to the inner and outer crossbars using electrostatic attraction and friction. The canopy is made of transparent PVC membrane, with UPVC edge strips hot-melt welded to the left and right sides and fixed to the flanges of the I-shaped cantilever beams using metal clamps. At the inner crossbars, the canopy is hot-melt welded to form a sleeve, which is then threaded through and fixed to the inner crossbars. The inner and outer sides of the canopy, or only the outer side, are bent and droop, with the edges hot-melt welded to a rigid plastic connecting plate. This connecting plate is then connected to bolts and the lower curtain to form a unified whole.

[0012] The curtain is bolted to the ceiling edge and hangs naturally from the outside of the cantilever beams, outer crossbars, and / or inner crossbars. The curtain is openable and made of transparent PVC. There are two installation methods: one with three sides (outside the two cantilever beams and the outer crossbar); the other with four sides (outside the two cantilever beams, the inner crossbar, and the outer crossbar). A vertical counterweight plate is installed at the bottom of the curtain, and the upper connecting plate and its lower counterweight plate are correspondingly installed in sections. Adjacent curtains, curtains to metal posts, and curtains to L-shaped polycarbonate corner posts at corners are connected by self-adhesive magnetic strips to improve the curtain's sealing and stability.

[0013] The corner post is connected to the cantilever beam at the top by a slot and screws, and to the base at the bottom by a slot and screws to fix it to the ground, thus reinforcing the vestibule structure.

[0014] The advantages of this utility model compared with the prior art are as follows:

[0015] This utility model features a windproof vestibule that is easy to assemble and disassemble: the assembly of the support structure and maintenance system does not require complicated tools or advanced professional skills, and 1 to 2 skilled workers can complete the installation or disassembly of the vestibule within half a day, meeting the needs of flexible use in different scenarios.

[0016] Compared to traditional methods that require the closure of entrances for new fixed vestibules, the main components of this invention are prefabricated in the factory and only need to be assembled on-site. This reduced on-site construction time can effectively minimize business losses caused by business closures.

[0017] The components of this invention are reusable, and only easily damaged parts need to be replaced during subsequent disassembly, assembly, and maintenance, thus reducing long-term operating costs. Simultaneously, it effectively blocks hot and cold outdoor air, reducing indoor heating or cooling energy consumption and achieving energy conservation and efficiency. Attached Figure Description

[0018] Figure 1 This is a plan view of a windproof vestibule according to the present invention.

[0019] Figure 2 This is a plan view of a door-and-window windproof vestibule.

[0020] Figure 3 This is a plan view of a windproof vestibule for a large-span roller shutter door (or doorway).

[0021] Figure 4 This is a cross-sectional view at point AA.

[0022] Figure 5 This is a cross-sectional view of point BB, used when the original entrance had doors and windows.

[0023] Figure 6 This is a cross-sectional view at point CC, used when the original entrance was a roller shutter door or doorway.

[0024] Figure 7 yes Figure 4 Enlarged view of the structure at the EE section.

[0025] Figure 8 yes Figure 5 Enlarged view of the structure at the FF position.

[0026] Figure 9 This is a plan view of the right-side sleeve cantilever beam.

[0027] Figure 10 This is a plan view of the right-side cantilever beam from below.

[0028] Figure 11 It is an elevation view of the root and end of the cantilever beam.

[0029] Figure 12 yes Figure 11 Cross-sectional view at point DD.

[0030] Figure 13 This is a bottom perspective view of a sleeve cantilever beam.

[0031] Figure 14 This is a schematic diagram of the square steel tube column base structure.

[0032] Figure 15 This is a schematic diagram of an L-shaped corner column base structure.

[0033] As shown in the figure: 1. Metal column, 2. Cantilever beam, 3. Inner crossbar, 4. Outer crossbar, 5. Corner column, 6. Ceiling, 7. Door curtain, 8. Angle steel anchor, 9. Base, 10. Sleeve, 11. Metal clamp, 12. Connecting plate, 13. Slot, 14. Folded edge strip, 15. Counterweight plate, 16. Magnetic strip, 17. Web plate, 18. Lower hanging plate, 19. Flange, 20. Semi-circular support, 21. Circular support, 22. Crossbar sleeve, 23. Windproof door curtain. Detailed Implementation

[0034] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer", "vertical", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0035] In the description of this utility model, "first feature" and "second feature" may include one or more of the indicated features. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the indicated features.

[0036] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0037] The following is a detailed description of a windproof vestibule according to the present invention, with reference to the accompanying drawings.

[0038] Combined with appendix Figure 1-3 The specific implementation process of this utility model for a windproof vestibule is as follows:

[0039] Square metal column 1: Serving as the main supporting structure of the vestibule, it is installed on the inner side of the vestibule against the wall or on both sides of the existing main entrance; the column is made of high-strength aluminum alloy or steel square tubing. The top of the column is reliably fixed to the floor slab, lintel, or wall above the vestibule using angle steel anchors 8; the bottom of the metal column 1 uses a UPVC base 9, which is bonded to the ground with high-viscosity elastic double-sided self-adhesive, and further secured with silicone sealant to ensure that the aesthetics of the ground are not affected after the vestibule is removed.

[0040] UPVC sleeve 10 cantilever beam 2: The cantilever beam 2 extending outward from the top of the vestibule is made of UPVC and is fixed to the square metal riser by sleeve 10 and bolts. The cantilever beam 2 is sloping upward and flat downward, which is visually appealing and facilitates drainage at the top of the ceiling 6. The roots and ends of the symmetrical UPVC cantilever beams 2 on both sides of the door are equipped with crossbar supports, which also serve as the support points for the inner and outer crossbars at the top of the vestibule. The cantilever beam 2 includes a web plate 17 and a lower hanging plate 18, which are integrally formed. Flanges 19 extending to both sides are provided at the connection between the web plate 17 and the lower hanging plate 18 and at the top of the web plate 17. One end of the web plate 17 and the lower hanging plate 18 is provided with a sleeve 10, and the opposite end is provided with a groove 13. The surface of the sleeve 10 is provided with a semi-circular support 20 for fixing the inner crossbar 3, and the upper end of the web plate 17 above the groove 13 is provided with a circular support 21 for fixing the outer crossbar 4.

[0041] The inner and outer stainless steel pipe horizontal crossbars 3 and 4 on the inner and outer sides of the top of the vestibule are fixed to the supports attached to the cantilever beam 2 with screws at both ends. The two horizontal crossbars and the UPVC cantilever beams 2 on both sides of the vestibule form a load-bearing structural frame. In addition, the canopy 6 (PVC soft film) covering the top of the frame is fixed to the cantilever beam 2 on both sides with metal clamps 11. The soft film is adhered to the stainless steel crossbars on both sides through electrostatic adsorption and friction. The combination of the soft film and the frame structure produces a skin effect, forming a canopy 6 support structure with high horizontal stiffness. For large (or extra-large) vestibules in areas with high winds, anchor points can be set at the root and end of the left and right cantilever beams 2 as needed, and X-shaped steel cables can be added to increase the horizontal stiffness of the support structure. The vertical direction of this support structure is fixed to the two square steel metal columns 1 on the inner side of the vestibule with sleeves 10 and bolts, and the outer side is supported by two L-shaped corner columns 5, which enhances the vertical load-bearing capacity of the cantilever beam 2 ends.

[0042] The L-shaped corner post 5 on the outside of the vestibule is made of polycarbonate sheet with folded edges. Polycarbonate sheet has strong impact resistance and can effectively resist possible external impacts. It also has good light transmission. While serving as the frame post of the vestibule, it reduces the presence of the corner post.

[0043] The upper and lower ends of the corner post 5 are fixed to the ends of the UPVC cantilever beam 2 and the ground base 9 respectively by means of the slot 13 and screws; the lower UPVC base 9 is pasted to the ground with high viscosity elastic double-sided self-adhesive, and the edges are sealed and anchored with silicone sealant so as not to affect the aesthetics of the ground after the vestibule is removed.

[0044] The windproof vestibule, through a spatial combination structure formed by "frame structure + skin effect + ground support", can effectively resist horizontal and vertical displacement under the action of gravity and wind load, ensuring the structural safety of the vestibule.

[0045] The vestibule canopy 6 is made of a single sheet of 1.5mm thick transparent PVC soft film; the left and right sides of the PVC soft film of the canopy 6 are hot-melt welded with UPVC trim strips, and fixed to the flange 19 of the I-shaped cantilever beam 2 with finished metal clamps 11.

[0046] For buildings with existing doors and windows at the entrance, the soft membrane of the ceiling 6 is hot-melt welded at the inner horizontal bar 3 to form a horizontal bar sleeve 22, which is then fixed to the inner metal horizontal bar 3. Transparent thickened PVC operable curtains 7 are installed on the three vertical surfaces of the vestibule. For buildings with existing roller shutter doors or doorways at the entrance, transparent thickened PVC operable curtains 7 are installed on all four vertical surfaces of the vestibule.

[0047] The inner and outer sides (or only the outer side) of the ceiling 6 stretch membrane are bent and drooped by the inner metal crossbars 3 and outer metal crossbars 4, and the edges are hot-melt welded to the rigid plastic connecting plate 12. Through the connecting plate 12 and bolts, it forms a whole with the lower operable curtain 7, and the PVC stretch membrane of the ceiling can be stretched taut by the gravity of the lower curtain 7. The UPVC connecting plate 12 at the top of the curtain 7 and the counterweight plate 15 at the bottom are arranged in sections to facilitate the folding and storage of the entire ceiling 6 stretch membrane.

[0048] The curtains 7 on the inner (outer) side of the vestibule are connected to the ceiling membrane via bolts and connecting plates 12; the curtains 7 on the left and right sides are fixed to the cantilever beam underhanging plates 18 with bolts. All curtains 7 can also be connected to the connecting plates 12 hanging under the UPVC cantilever beam 2 or the UPVC connecting plates 12 hot-melt welded to the ceiling membrane 6 using pre-made aluminum alloy guide rails and bolts, so that the curtains 7 can slide left and right along the guide rails and become openable curtains 7 when needed.

[0049] The vertical surface of the vestibule is made of transparent and thickened PVC curtain 7, which has good flexibility and light transmission and plays a role in blocking airflow. The lower part of the curtain 7 is equipped with a vertical counterweight plate 15 so that the curtain 7 can be restored to a vertical and closable state in time after being opened. The curtains 7 are connected to each other, to the inner metal columns 1, and to the polycarbonate L-shaped corner columns 5 at the corners by self-adhesive magnetic strips 16, which can automatically close after people enter and exit, effectively blocking cold outdoor wind and dust.

[0050] The construction procedure for the vestibule is as follows:

[0051] For customers who intend to add windproof vestibules, professional technicians will conduct on-site measurements and communicate with the customer. Based on the measurement results and the customer's requirements, the plan and vertical dimensions of the vestibule will be determined. Then, based on the local climate conditions (design values ​​of wind pressure and snow load), the specifications and models of relevant structural components will be determined, and the design drawings, construction plan and quotation for the vestibule will be submitted to the customer.

[0052] After the business negotiations are finalized, the structural components and maintenance system will be processed and customized according to the design drawings, and sufficient related accessories will be prepared and transported to the installation site as planned.

[0053] Positioning and laying out according to the design drawings: First, attach the foundation of the vestibule—that is, the UPVC base 9 of the square steel pipe column and the L-shaped corner column 5—to the ground positioning point using high-viscosity elastic double-sided self-adhesive; then insert the lower end of the square steel pipe column with the UPVC sleeve 10 fitted into the cantilever beam 2 into the base 9, and reliably fix the upper end of the square steel metal column 1 to the building roof, lintel or wall surface with metal angle brackets and bolts.

[0054] Raise the UPVC sleeve 10 cantilever beam 2 to a position slightly higher than the designed height of the square steel metal column 1. Then insert the upper and lower ends of the L-shaped polycarbonate corner column 5 into the base 9 and the slot 13 under the cantilever beam, respectively, and fix them with screws. After leveling the lower end of the cantilever beam 2, fix the UPVC cantilever beam 2 sleeve 10 to the square steel metal column 1 with pipe bolts.

[0055] Place the inner horizontal bars 3 and outer horizontal bars 4 of the stainless steel tubes on both the inner and outer sides of the canopy 6 onto the horizontal bar supports attached to the inner side of the cantilever beam, and fix them with screws (Note: If there are existing doors and windows at the building entrance and curtains 7 are installed on three sides of the vestibule, first put the horizontal bar sleeve 22, which is made by hot-melt welding of the soft membrane of the canopy 6, onto the inner horizontal bar 3, and then fix the stainless steel horizontal bars and supports with screws) to complete the construction of the vestibule support structure.

[0056] The entire soft film of the canopy 6, which has been pre-heat-melted and welded with UPVC connecting plate 12 and folded edge strip 14, is placed on the support frame. The soft film with folded edges on the left and right sides is fixed to the flange 19 of the I-shaped UPVC cantilever beam 2 through the strip and finished metal clamp 11.

[0057] The thickened transparent operable curtains 7 on both the inner and outer sides (or only the outer side) are fixed to the UPVC connecting plate 12, which is hot-melt welded to the soft film of the ceiling 6, with bolts (or slide rails).

[0058] The thickened transparent operable curtains 7 on the left and right sides are fixed to the connecting plate 12 hanging under the I-shaped UPVC cantilever beam with bolts (or slide rails).

[0059] Apply silicone sealant around the five supports of the square steel columns and L-shaped corner columns, and take protective measures.

[0060] Organize and test the vestibule, clean the site and pass customer acceptance; hand over the vestibule maintenance and disassembly manual and spare parts for vulnerable parts (such as UPVC base 9) to the customer, and conduct disassembly and assembly demonstrations and training on site.

[0061] This utility model is widely applicable to cold regions, hot-summer-cold-winter regions, and hot regions, and is mainly used in winter and summer. During the heating (cooling) period of air conditioning, in order to ensure a comfortable indoor environment, reduce energy consumption caused by indoor and outdoor air convection, and facilitate the passage of people at the entrances and exits, it is necessary to temporarily modify the building entrance and add windproof vestibules.

[0062] During the pleasant spring and autumn seasons when the building is naturally ventilated, the windproof vestibule can be easily removed and stored, and then reinstalled and reused during the winter and summer air-conditioned seasons.

[0063] Windproof vestibules should generally be installed close to the outside of the building entrance; however, if they cannot be installed outside the building entrance due to limitations in the width of the outdoor platform or sidewalk, or due to constraints such as planning or urban management, they can be installed in the opposite direction inside the entrance.

[0064] This utility model's detachable windproof vestibule, in addition to being used for a single entrance gate, can also be used in combination with a large-area single-layer fixed (or folding and sliding) transparent windproof door curtain 23 to solve the building energy-saving problem of shops such as fruit supermarkets and tourist souvenir shops that require a large display area during the winter and summer air-conditioned seasons.

[0065] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A windproof vestibule, characterized in that: It includes metal columns (1), cantilever beams (2), inner crossbars (3), outer crossbars (4), corner columns (5), ceiling (6), and door curtains (7); The metal column (1) is fixed to the side close to the building and its top is connected to the building by angle steel anchors (8), and its bottom is connected to the ground by a base (9); The cantilever beam (2) is fixed to the metal column (1) by a sleeve (10) and bolts, and it is inclined at the top and flat at the bottom. There are two metal columns (1), and each metal column (1) is connected to a cantilever beam (2) by a sleeve (10). The inner crossbar (3) and outer crossbar (4) are both fixed to the crossbar support of the cantilever beam (2) by screws. The inner crossbar (3) and outer crossbar (4) are arranged in parallel with the two cantilever beams (2) to form a load-bearing structural frame supporting the roof (6). The canopy (6) covers the top of the load-bearing structural frame and is fixed to the cantilever beam (2) on the left and right sides by metal clamps (11), and is attached to the inner crossbar (3) and outer crossbar (4) on the front and back sides by electrostatic adsorption and friction. The curtain (7) is connected to the edge of the ceiling (6) by bolts and connecting plate (12) and hangs down naturally from the outside of the cantilever beam (2), outer crossbar (4) and / or inner crossbar (3); The corner post (5) is fixed to the ground by connecting the cantilever beam (2) to the top of the corner post (5) with a screw via a slot (13) and the base (9) to the bottom via a slot (13) and a screw.

2. A windproof vestibule according to claim 1, characterized in that: The metal column (1) is made of aluminum alloy or steel square tube. The top of the metal column (1) is fixed to the floor slab, lintel or wall above it using angle steel anchors (8). The base (9) is made of UPVC material and is bonded to the ground with elastic double-sided adhesive and sealed with silicone sealant.

3. A windproof vestibule according to claim 2, characterized in that: The canopy (6) is made of transparent PVC soft film. The canopy (6) has UPVC folded edge strips (14) welded on the left and right sides and fixed to the flange (19) of the I-shaped cantilever beam (2) by metal clamps (11).

4. A windproof vestibule according to claim 3, characterized in that: The canopy (6) is formed by hot-melt welding at the inner crossbar (3) to form a crossbar sleeve (22) and is fixed to the inner crossbar (3). The door curtain (7) can be opened and is made of transparent PVC material. The door curtain (7) is provided on three sides: the outside of the two cantilever beams (2) and the outside of the outer crossbar (4).

5. A windproof vestibule according to claim 3, characterized in that: The door curtain (7) is openable and made of transparent PVC material. The door curtain (7) has four sides, namely: the outer sides of the two cantilever beams (2) and the outer sides of the inner crossbar (3) and the outer crossbar (4).

6. A windproof vestibule according to claim 4 or 5, characterized in that: The canopy (6) is bent down on both the inner and outer sides or only on the outer side, and the edges are hot-melted and welded to a rigid plastic connecting plate (12). It is connected to the bolts and the lower curtain (7) through the connecting plate (12) to form a whole. The lower end of the curtain (7) is provided with a vertical counterweight plate (15). The connecting plate (12) at the top of the curtain (7) and the counterweight plate (15) at its bottom are corresponding to each other and set in sections.

7. A windproof vestibule according to claim 6, characterized in that: Adjacent door curtains (7), door curtains (7) and metal pillars (1), and door curtains (7) and polycarbonate L-shaped corner pillars (5) at the corner are connected by self-absorbing magnetic strips (16).

8. A windproof vestibule according to claim 7, characterized in that: The cantilever beam (2) is made of UPVC material, and the two cantilever beams (2) are symmetrically located on both sides of the door.

9. A windproof vestibule according to claim 8, characterized in that: The cantilever beam (2) includes a web (17) and a lower hanging plate (18); the web (17) and the lower hanging plate are integrally formed, and the connection between the web (17) and the lower hanging plate and the top of the web (17) are provided with flanges (19) extending to both sides. One end of the web (17) and the lower hanging plate is provided with a sleeve (10), and the other end is provided with a slot (13). The surface of the sleeve (10) is provided with a semi-circular support (20) for fixing the inner crossbar (3), and the upper end of the web (17) of the slot (13) is provided with a circular support (21) for fixing the outer crossbar (4).

10. A windproof vestibule according to claim 9, characterized in that: Both the inner crossbar (3) and the outer crossbar (4) are made of stainless steel tubing.

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