Automatic folding and unfolding system and method for temporary canopy of open-air hole

Abstract

The invention relates to the technical field of building construction, in particular to an automatic folding and unfolding system and method for a temporary canopy of an open-air hole, the automatic folding and unfolding system comprises canopy cloth and supporting frames arranged at the two ends of the canopy cloth, and first rolling bodies are arranged on the supporting frames; an expansion driving piece and an expansion structure assembly are arranged between the two supporting frames; an upper ejection piece is arranged on the expansion structure assembly; the canopy cloth is unfolded in the mode that a worker twists a driving rod to drive the two supporting frames to be away from each other, in the unfolding process, the outer ends of the two first connecting rods located on the two sides of the base pull the base to ascend in the process that the outer ends of the two first connecting rods move along with the two included angle points, and finally the canopy cloth is jacked up by the upper jacking piece; at the moment, the canopy cloth forms an arch structure, the formed arch structure enables rainwater falling on the canopy cloth to slide into the arc-shaped inwards-concave faces formed in the two supporting frames in the trend of the arch structure, and finally the rainwater is drained through the drainage holes communicated with the arc-shaped inwards-concave faces.

Description

Technical Field

[0001] The invention relates to the technical field of building construction, and in particular to an automatic retracting and releasing system and method for a temporary rain shed with an open-air hole. Background Art

[0002] In building construction, temporary open-air holes are holes that are temporarily opened to meet certain specific needs during the construction process. They are usually closely related to lifting, transportation, installation and other work; they play an important role in the entire life cycle of the construction project, especially in the construction phase, and can provide necessary convenience for construction workers.

[0003] At present, in order to avoid water accumulation in buildings caused by rainy days during the construction process, temporary structures are often needed to cover the open-air holes. The shielding method is generally to build a frame with staggered bamboo poles, and then lay tarpaulin on the frame. However, this method has certain disadvantages. For example, water will accumulate at the center of the tarpaulin and cause it to fall, which increases the instability and leakage of the shielding facilities. In addition, the water accumulated on the tarpaulin will cause certain difficulties in the recovery of the facility when the open-air hole is reopened. Summary of the invention

[0004] In view of this, the purpose of the present invention is to propose an automatic retracting and extending system for temporary awnings for open-air holes, so as to solve the technical problems that when existing measures are used to cover open-air holes in construction areas, water will accumulate at the center of the tarpaulin and cause it to fall, increasing the instability and leakage of the shielding facilities, and ultimately causing certain difficulties in the recovery of the facilities due to the accumulated water on the tarpaulin when the open-air holes are reopened.

[0005] Based on the above purpose, the present invention provides an automatic retracting and releasing system for temporary awnings in open-air holes, comprising an awning cloth and support frames arranged at both ends of the awning cloth, wherein the support frames are provided with a first rolling body; An expansion drive and an expansion structure assembly are arranged between the two support frames, and the expansion drive is used to control the distance between the support frames at both ends of the awning cloth so that the awning cloth is in an expanded or compressed state; an upper push piece is arranged on the expansion structure assembly, and when the awning cloth is in an expanded state, the upper push piece drives the awning cloth to be arched up; The support frame is provided with a drainage hole, and the drainage hole is located at the low point of the arched awning cloth.

[0006] Preferably, the expansion drive member includes a support seat and a drive rod, wherein the support seats are respectively arranged on two support frames, and nuts are arranged on the support seats; two sections of threads are opened opposite to each other on the drive rod, and the two sections of threads of the drive rod are respectively threadedly connected with the nuts on one support seat and the second support seat.

[0007] Preferably, the expansion structure assembly includes a base, the upper member is mounted on the base, a first connecting rod is symmetrically arranged on the base, and one end of the first connecting rod is hinged to the base; Two groups of rod bodies are also provided on both sides of the base, one group of rod bodies consists of two second connecting rods, one end of the two second connecting rods is hinged to the other end of the first connecting rod, and the other ends of the two second connecting rods are respectively hinged to the first support frame and the second support frame.

[0008] Preferably, the awning cloth comprises a top cloth, and side skirts are distributed on both sides of the top cloth.

[0009] Preferably, the automatic retractable and extending system of the awning also includes a connecting rod and a reeling rod, the connecting rod is fixedly mounted on one of the support frames, and the reeling rod is rotatably mounted on the second support frame, and a coil spring is provided on the second support frame, one end of the coil spring is connected to the reeling rod, and the other end of the coil spring is connected to the corresponding support frame body.

[0010] Preferably, a curved concave is formed on the support frame, and the curved concave spans below the end of the awning cloth, and the drainage port provided on the support frame is connected to the curved concave.

[0011] Preferably, the automatic retracting and extending system of the awning also includes a positioning plate for contacting the inner wall of the open-air hole, and the positioning plate is installed on the supporting frame.

[0012] Preferably, the automatic retractable and extending system of the canopy also includes a covering plate, on which hollow liquid inlets are distributed, and the covering plate is installed on the support frame, and the covering plate is located above the concave arc surface of the support frame.

[0013] Preferably, the automatic awning retracting and extending system further comprises a linkage mechanism for controlling the gap between the covering plate and the awning cloth; The linkage mechanism includes a push rod, which is arranged on the bottom wall of the covering plate, the covering plate is slidably connected with the supporting frame, and the supporting frame is provided with a first elastic element for driving the covering plate to contact the awning cloth; A limiting rod, wherein the limiting rod is arranged on the positioning plate, the positioning plate is slidably connected with the support frame through the limiting rod, and a second elastic element is arranged on the limiting rod for pushing the positioning plate away from the center plane between the two support frames; A second rolling body is arranged at the bottom end of the top rod, a positioning rod is arranged on the positioning plate, a wedge-shaped groove for accommodating the second rolling body is formed on the positioning rod, and when the second rolling body is in the wedge-shaped groove, the covering plate contacts the awning cloth.

[0014] Preferably, a method for automatically retracting and releasing a temporary canopy in an open-air hole comprises the following steps: Step 1: The entire device in the initial state is transferred to the top of the open-air hole, and the first rolling body arranged on the support frame is placed on the ground on both sides of the open-air hole; Step 2: The staff twists the driving rod to make it rotate, and when the driving rod rotates, the awning cloth is unfolded by driving the two support frames away from each other; Step 3: When the two support frames are moving away from each other, since the two ends of the awning cloth are connected to the connecting rod and the reeling rod respectively, the connecting rod provided on one of the support frames will pull the awning cloth out from being wound on the reeling rod; Step 4: As the two support frames move away from each other, the inner angles of the two second connecting rods in one set of rod bodies will continue to expand, and eventually the inner angles of the two sets of rod bodies will expand and the two angle points will move away from each other. The outer ends of the two first connecting rods on both sides of the base will pull the base up as the two angle points move, and finally the upper lifting piece will lift up the top cloth of the awning cloth; Step 5: The formed arch structure allows the rainwater falling on the awning cloth to slide along the arch structure to the arc-shaped inner concave surfaces formed on the two support frames, and finally the rainwater will be discharged through the drainage holes connected to the arc-shaped inner concave surfaces.

[0015] Beneficial effects of the present invention: The present invention allows the awning cloth to unfold by a worker twisting a driving rod to drive the two support frames to move away from each other. During the unfolding process, the outer ends of the two first connecting rods on both sides of the base pull the base up as the two angle points move, and finally the upper jack lifts the top cloth of the awning cloth. At this time, the awning cloth forms an arch structure. The arch structure formed causes rainwater falling on the awning cloth to slide along the arch structure to the arc-shaped inner concave surfaces formed on the two support frames, and finally the rainwater will be discharged through the drainage holes connected to the arc-shaped inner concave surfaces. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only for the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 The three-dimensional structure of the present invention in the unfolded state is shown in FIG. Figure 1 ; Figure 2 The three-dimensional structure of the present invention in the unfolded state is shown in FIG. Figure 2 ; Figure 3 The three-dimensional structure of the present invention in the unfolded state is shown in FIG. Figure 3 ; Figure 4 The three-dimensional structure of the present invention in the unfolded state is shown in FIG. Figure 4 ; Figure 5 It is a schematic diagram of the three-dimensional structure of the support frame of the present invention; Figure 6 A side view of the present invention in an unfolded state; Figure 7 for Figure 6 A magnified image of point A; Figure 8 It is a schematic diagram of the internal structure of the support frame in the unfolded state of the present invention; Fig. 9 It is a schematic diagram of the internal structure of the support frame of the present invention; Fig.10 It is a schematic diagram of the three-dimensional structure of the present invention in a folded state; Fig.11 It is a schematic diagram of the three-dimensional structure during the unfolding process of the present invention.

[0018] The numbers in the figure are: 1-awning cloth; 11-top cloth; 12-side skirts; 2-support frame; 21-first rolling body; 22-drainage hole; 23-arc concave; 3-expansion drive member; 31-support seat; 32-nut; 33-drive rod; 4-expansion structure assembly; 41-upper member; 42-base; 43-first connecting rod; 44-second connecting rod; 5-connecting rod; 6-winding rod; 61-winding spring; 7-positioning plate; 71-limiting rod; 72-second elastic element; 73-positioning rod; 731-wedge groove; 8-covering plate; 81-first elastic element; 82-top rod; 821-second rolling body; 9-buckle. DETAILED DESCRIPTION

[0019] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments.

[0020] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0021] The first aspect of the present invention provides an automatic retractable system for temporary canopies in open-air holes, such as Figures 1 to 9 As shown, it includes a awning cloth 1 and a support frame 2 arranged at both ends of the awning cloth 1, and a first rolling body 21 is arranged on the support frame 2; An expansion drive member 3 and an expansion structure assembly 4 are provided between the two support frames 2, and the expansion drive member 3 is used to control the distance between the support frames 2 at both ends of the awning cloth 1 so that the awning cloth 1 is in an expanded or compressed state; an upper push member 41 is provided on the expansion structure assembly 4, and when the awning cloth 1 is in an expanded state, the upper push member 41 drives the awning cloth 1 to be arched up; The support frame 2 is provided with a drainage hole 22 , and the drainage hole 22 is located at the low point of the arched awning cloth 1 .

[0022] The first rolling body 21 in this embodiment is a roller but is not limited thereto.

[0023] like Figure 2 and Figure 3 As shown, further: The expansion drive member 3 includes a support seat 31 and a drive rod 33. The support seat 31 is respectively arranged on the two support frames 2, and a nut 32 is arranged on the support seat 31; two sections of threads are opened opposite to each other on the drive rod 33, and the two sections of threads of the drive rod 33 are respectively threadedly connected with the nuts 32 on one support seat 31 and the second support seat 31.

[0024] like Figure 3 and Figure 4 As shown, further: The expansion structure assembly 4 includes a base 42, the upper member 41 is installed on the base 42, and a first connecting rod 43 is symmetrically arranged on the base 42, and one end of the first connecting rod 43 is hinged to the base 42; Two groups of rod bodies are also provided on both sides of the base 42. One group of rod bodies consists of two second connecting rods 44. One end of the two second connecting rods 44 is hinged to the other end of the first connecting rod 43, and the other ends of the two second connecting rods 44 are hinged to the first support frame 2 and the second support frame 2 respectively.

[0025] like Figure 2 As shown, further: The awning fabric 1 comprises a top fabric 11 , and side skirts 12 are distributed on both sides of the top fabric 11 .

[0026] like Figure 6 and Fig. 9 As shown, further: The automatic retractable and extending system of the awning also includes a connecting rod 5 and a reeling rod 6. The connecting rod 5 is fixedly mounted on one support frame 2, and the reeling rod 6 is rotatably mounted on the second support frame 2. A coil spring 61 is provided on the second support frame 2. One end of the coil spring 61 is connected to the reeling rod 6, and the other end of the coil spring 61 is connected to the corresponding support frame 2 body.

[0027] like Figure 5 As shown, further: A curved concave 23 is formed on the support frame 2 , and the curved concave 23 spans the lower portion of the end of the awning fabric 1 , and a drainage port provided on the support frame 2 is communicated with the curved concave 23 .

[0028] like Figure 6 As shown, further: The automatic retractable and extending system of the canopy further comprises a positioning plate 7 for contacting the inner wall of the open-air hole, and the positioning plate 7 is mounted on the supporting frame 2 .

[0029] In this embodiment, when it is necessary to shield the open-air hole at the construction site, the worker holds the handles on the two support frames 2 to Fig.10 As shown, the entire device in the initial state is transferred to the top of the open-air hole, and the first rolling body 21 arranged on the support frame 2 is placed on the ground on both sides of the open-air hole. First, the buckle 9 connecting the two support frames 2 is opened, and then the staff twists the driving rod 33 to make it rotate. Since the driving rod 33 itself has two opposite sections of threads, and the two sections of threads are respectively threadedly connected to the support seats 31 installed on the first support frame 2 and the second support frame 2, when the driving rod 33 rotates, the awning cloth 1 will be unfolded by driving the two support frames 2 away from each other, until the positioning plates 7 on the two support frames 2 contact the inner walls on both sides of the open-air hole, so that the driving rod 33 cannot rotate, which means that the awning cloth 1 is unfolded. like Fig.11 As shown, the specific process of unfolding the awning cloth 1 is that, in the process of the two support frames 2 moving away from each other, since the two ends of the awning cloth 1 are respectively connected to the connecting rod 5 and the winding rod 6, the connecting rod 5 provided on one of the support frames 2 will pull the awning cloth 1 out from being wound on the winding rod 6; During the unfolding process of the awning cloth 1, two groups of rods in the expansion structure assembly 4 will drive the base 42 to rise. One group of rods is two second connecting rods 44 on one side of the base 42. During the process of the two support frames 2 moving away from each other, the inner angles of the two second connecting rods 44 in one group of rods will continue to expand, and eventually the inner angles of the two groups of rods are expanding and the two angle points are moving away from each other. The outer ends of the two first connecting rods 43 on both sides of the base 42 pull the base 42 up as the two angle points move, and finally the upper lifting member 41 lifts up the top cloth 11 of the awning cloth 1. At this time, the awning cloth 1 forms an arched structure, and the side skirts 12 on both sides of the top cloth 11 will cover and block the gaps on both sides of the arched structure. The formed arched structure allows rainwater falling on the awning cloth 1 to slide along the arched structure to the arc-shaped inner concave surfaces formed on the two support frames 2, and finally the rainwater will be discharged through the drainage holes 22 connected to the arc-shaped inner concave surfaces; The function of the coil spring 61 is that when the awning cloth 1 needs to stop being used, when the staff twists the driving rod 33 to bring the two support frames 2 closer to each other, the coil spring 61 can drive the reeling rod 6 to rotate under its own elastic action, so that the awning cloth 1 is rewound on the reeling rod 6, making the storage of the awning cloth 1 more neat and beautiful; The awning cloth 1 is made of PVC coated polyester cloth but is not limited thereto. As an embodiment, in order to prevent some solid debris other than rainwater from entering and clogging the drainage hole 22 during the process of rainwater flowing into the arc-shaped inner concave surface along the arched awning fabric 1, as shown in FIG. Figure 7 As shown, further: The automatic retractable and extending system of the canopy also includes a covering plate 8 , on which hollow liquid inlets are distributed. The covering plate 8 is installed on the support frame 2 , and the covering plate 8 is located above the arc-shaped concave 23 of the support frame 2 .

[0030] In this embodiment, the arched structure formed allows rainwater falling on the awning cloth 1 to slide along the arched structure to the arc-shaped inner concave surfaces formed on the two support frames 2. Before the rainwater enters the arc-shaped inner concave surface, it will pass through the hollow liquid inlet on the covering plate 8 to effectively block solid debris, and finally the rainwater will be discharged through the drainage holes 22 connected to the arc-shaped inner concave surface.

[0031] In order to avoid that the cover plate 8 is too close to the awning cloth 1 during the unfolding process, causing additional friction, resulting in an unsmooth unfolding process and wear of the awning cloth 1, as an implementation method, Figures 7 to 9 As shown, further: The automatic awning retracting and releasing system also includes a linkage mechanism for controlling the gap between the cover plate 8 and the awning cloth 1; The linkage mechanism includes a push rod 82, which is arranged on the bottom wall of the cover plate 8, the cover plate 8 is slidably connected to the support frame 2, and the support frame 2 is provided with a first elastic element 81 for driving the cover plate 8 to contact the awning cloth 1; A limiting rod 71, wherein the limiting rod 71 is disposed on the positioning plate 7, the positioning plate 7 is slidably connected to the support frame 2 via the limiting rod 71, and a second elastic element 72 is disposed on the limiting rod 71 for pushing the positioning plate 7 away from the center plane between the two support frames 2; A second rolling body 821 is provided at the bottom end of the top rod 82, and a positioning rod 73 is provided on the positioning plate 7. A wedge-shaped groove 731 is formed on the positioning rod 73 to accommodate the second rolling body 821. When the second rolling body 821 is in the wedge-shaped groove 731, the covering plate 8 is in contact with the awning cloth 1.

[0032] In this embodiment, in the initial state, the wedge-shaped groove 731 provided on the positioning rod 73 is not located below the top rod 82, the second rolling body 821 is a ball in this embodiment but is not limited thereto, the ball below the top rod 82 is in contact with the upper top wall of the positioning rod 73, the first elastic element 81 is a spring in this embodiment, at this time, the spring of the first elastic element 81 is in a contracted state, and the covering plate 8 is also not in contact with the awning cloth 1; When the staff member twists the driving rod 33 to move the two support frames 2 away from each other, the positioning plates 7 on the two support frames 2 contact the inner walls on both sides of the open-air hole. The second elastic element 72 is a spring in this solution. At this time, since the spring has an elastic deformation range, the staff member can still control the driving rod 33 to rotate. When the spring reaches the limit compression range, the two support frames 2 will be unable to move, and the driving rod 33 can be stopped from rotating. When the spring of the second elastic element 72 is compressed, the relative position relationship between the positioning plate 7 and the support frame 2 will also move. When the positioning rod 73 moves with the positioning plate 7, the wedge-shaped groove 731 on the positioning rod 73 will be below the top rod 82. Pushed by the spring of the first elastic element 81, the covering plate 8 and the top rod 82 will both descend, and the second rolling body 821 under the top rod 82 will enter the wedge-shaped groove 731. At this time, the awning cloth 1 has been unfolded, and the covering plate 8 will also be close to the surface of the awning cloth 1.

[0033] The present invention provides an automatic retracting and releasing method for a temporary rain shed in an open-air hole, comprising the following steps: Step 1: The entire device in the initial state is transferred to the top of the open-air hole, and the first rolling body 21 arranged on the support frame 2 is placed on the ground on both sides of the open-air hole; Step 2: The staff member twists the driving rod 33 to make it rotate, and when the driving rod 33 rotates, the two supporting frames 2 are driven away from each other to unfold the awning cloth 1; Step 3: When the two support frames 2 are moving away from each other, since both ends of the awning cloth 1 are connected to the connecting rod 5 and the reeling rod 6 respectively, the connecting rod 5 provided on one of the support frames 2 will pull the awning cloth 1 out from being wound around the reeling rod 6; Step 4: As the two support frames 2 move away from each other, the inner angles of the two second connecting rods 44 in one set of rod bodies will continue to expand, and eventually the inner angles of the two sets of rod bodies will expand and the two angle points will move away from each other. The outer ends of the two first connecting rods 43 on both sides of the base 42 will pull the base 42 upward as the two angle points move, and finally the upper lifting member 41 lifts up the top cloth 11 of the awning cloth 1. Step 5: The formed arch structure allows rainwater falling on the awning cloth 1 to slide along the arch structure to the arc-shaped inner concave surfaces formed on the two support frames 2, and finally the rainwater will be discharged through the drainage holes 22 connected to the arc-shaped inner concave surfaces.

[0034] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples. Under the concept of the present invention, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

[0035] The present invention is intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An automatic retractable system for temporary canopies in open-air holes, characterized in that: It includes a awning cloth and a support frame arranged at both ends of the awning cloth, and a first rolling body is arranged on the support frame; An expansion drive and an expansion structure assembly are arranged between the two support frames, and the expansion drive is used to control the distance between the support frames at both ends of the awning cloth so that the awning cloth is in an expanded or compressed state; an upper push piece is arranged on the expansion structure assembly, and when the awning cloth is in an expanded state, the upper push piece drives the awning cloth to be arched up; The support frame is provided with a drainage hole, and the drainage hole is located at the low point of the arched awning cloth.

2. The automatic retractable system for temporary canopies in open-air holes according to claim 1 is characterized in that: The expansion drive component includes a support seat and a drive rod, the support seats are respectively arranged on two support frames, and nuts are arranged on the support seats; two sections of threads are opened opposite to each other on the drive rod, and the two sections of threads of the drive rod are respectively threadedly connected with the nuts on one support seat and the second support seat.

3. The automatic retractable system for temporary canopy in open-air holes according to claim 1 is characterized in that: The expansion structure assembly includes a base, the upper member is installed on the base, a first connecting rod is symmetrically arranged on the base, and one end of the first connecting rod is hinged to the base; Two groups of rod bodies are also provided on both sides of the base, one group of rod bodies consists of two second connecting rods, one end of the two second connecting rods is hinged to the other end of the first connecting rod, and the other ends of the two second connecting rods are respectively hinged to the first support frame and the second support frame.

4. The automatic retractable system for temporary canopy in open-air holes according to claim 1 is characterized in that: The awning cloth comprises a top cloth, and side skirts are distributed on both sides of the top cloth.

5. The automatic retractable system for temporary canopy in open-air holes according to claim 1 is characterized in that: The automatic retractable and extending system of the awning also includes a connecting rod and a winding rod. The connecting rod is fixedly installed on one support frame, and the winding rod is rotatably installed on the second support frame. A coil spring is arranged on the second support frame, one end of the coil spring is connected to the winding rod, and the other end of the coil spring is connected to the corresponding support frame body.

6. The automatic retractable system for temporary canopies in open-air holes according to claim 1 is characterized in that: A curved concave is formed on the support frame, and the curved concave spans below the end of the awning cloth, and a drainage port provided on the support frame is communicated with the curved concave.

7. The automatic retractable and deployable system for temporary canopies in open-air holes according to claim 1 is characterized in that: The automatic retracting and extending system of the canopy also includes a positioning plate for contacting the inner wall of the open-air hole, and the positioning plate is installed on the supporting frame.

8. The automatic retractable and deployable system for temporary canopies in open-air holes according to claim 7 is characterized in that: The automatic retractable and extending system of the canopy also includes a covering plate, on which hollow liquid inlets are distributed, and the covering plate is installed on the supporting frame, and the covering plate is located above the inner concave arc surface of the supporting frame.

9. The automatic retractable and deployable system for temporary canopies in open-air holes according to claim 8, characterized in that: The automatic awning retracting and extending system also includes a linkage mechanism for controlling the gap between the covering plate and the awning cloth; The linkage mechanism includes a push rod, which is arranged on the bottom wall of the covering plate, the covering plate is slidably connected with the supporting frame, and the supporting frame is provided with a first elastic element for driving the covering plate to contact the awning cloth; A limiting rod, wherein the limiting rod is arranged on the positioning plate, the positioning plate is slidably connected with the support frame through the limiting rod, and a second elastic element is arranged on the limiting rod for pushing the positioning plate away from the center plane between the two support frames; A second rolling body is arranged at the bottom end of the top rod, a positioning rod is arranged on the positioning plate, a wedge-shaped groove for accommodating the second rolling body is formed on the positioning rod, and when the second rolling body is in the wedge-shaped groove, the covering plate contacts the awning cloth.

10. A method for automatically retracting and extending a temporary canopy in an open-air hole, using any one of the automatic canopy retracting and extending systems of claims 1 to 9, characterized in that: The following steps are included: Step 1: The entire device in the initial state is transferred to the top of the open-air hole, and the first rolling body arranged on the support frame is placed on the ground on both sides of the open-air hole; Step 2: The staff twists the driving rod to make it rotate, and when the driving rod rotates, the awning cloth is unfolded by driving the two support frames away from each other; Step 3: When the two support frames are moving away from each other, since the two ends of the awning cloth are connected to the connecting rod and the reeling rod respectively, the connecting rod provided on one of the support frames will pull the awning cloth out from being wound on the reeling rod; Step 4: As the two support frames move away from each other, the inner angles of the two second connecting rods in one set of rod bodies will continue to expand, and eventually the inner angles of the two sets of rod bodies will expand and the two angle points will move away from each other. The outer ends of the two first connecting rods on both sides of the base will pull the base up as the two angle points move, and finally the upper lifting piece will lift up the top cloth of the awning cloth; Step 5: The formed arch structure allows the rainwater falling on the awning cloth to slide along the arch structure to the arc-shaped inner concave surfaces formed on the two support frames, and finally the rainwater will be discharged through the drainage holes connected to the arc-shaped inner concave surfaces.

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