A large wind-resistant billboard

Abstract

The present invention discloses a large wind-resistant billboard. It comprises a frame, a plurality of blinds installed in the frame for carrying advertising information, and a blind driving device for driving the blinds. When the external wind speed is less than the wind speed required for display, the blinds can be put in a display state through the blind driving device; when the external wind speed is greater than the wind speed required for folding, the blind driving device can put each blade of the blinds in a folded state. The advantages of the present invention are: the flipping state of the blinds can be adjusted according to the wind force. When the wind force is strong, the blinds flip to make the entire billboard hollow, greatly reducing the lateral force of the wind on the billboard. When the wind force is weak, the billboard can be in a normal display state, thus solving the technical problem in the prior art that billboards rely on increasing structural strength to achieve strong wind resistance.

Description

Technical Field

[0001] The invention relates to an outdoor billboard, in particular to a large wind-resistant billboard. Background Art

[0002] Large billboards generally refer to billboards with specifications of 3 meters high and 8 meters wide or above, such as billboards next to highways and billboards on the roofs of buildings. These billboards are large in area and are usually placed in unobstructed areas. Therefore, they are easily affected by strong winds, especially because there are promotional posters on the side of the billboard. Therefore, when strong winds blow, the airflow cannot pass through the billboard, resulting in greater wind resistance and greater lateral force.

[0003] In the prior art, large outdoor billboards generally use methods to increase their strength to resist wind force, such as increasing the strength of the columns, adding inclined ropes, etc. Although the existing method is simple and easy, it will also increase the cost to a certain extent. Therefore, how to alleviate the resistance of wind force to billboards while minimizing costs has become a technical problem that needs to be solved urgently. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a large wind-resistant billboard with ingenious structural design, low manufacturing cost and the ability to effectively alleviate the resistance of wind to the billboard.

[0005] In order to solve the above technical problems, the large wind-resistant billboard of the present invention includes a frame, a plurality of blinds installed in the frame for carrying advertising information, and a blind driving device for driving the blinds. When the external wind speed is lower than the wind speed required for display, the blinds can be put into a display state through the blind driving device; when the external wind speed is higher than the wind speed required for folding, the blinds can be put into a folded state through the blind driving device.

[0006] The shutter driving device includes a pneumatic device, a lifting and pushing device driven by the pneumatic device to lift and lower, and a shutter driving plate driven by the lifting and pushing device to lift and lower so as to slide up and down. The shutter driving plate cooperates with the shutter to move the shutter.

[0007] The louver driving plate is provided with transverse grooves corresponding to the positions of the blades of the louver. Both ends of each blade of the louver are mounted on the frame through a rotating shaft and a swing arm is hinged on the rotating shaft at one end, and the end of each swing arm is inserted into the corresponding transverse groove.

[0008] An auxiliary bracket is also provided at one end of the frame, and the lifting and pushing device includes a lifting component installed on the auxiliary bracket and capable of being lifted and lowered relative to the auxiliary bracket, a lifting bracket installed on the lifting component, a support member provided on the lifting bracket for cooperating with a pneumatic device, and a vertical sliding rod installed in cooperation with the lifting bracket, wherein the vertical sliding rod is fixedly connected to the louver driving plate and can drive the louver driving plate to lift and lower.

[0009] The pneumatic device includes a mounting sleeve mounted on the auxiliary bracket, a rotating shaft arranged in the mounting sleeve and capable of freely rotating and sliding up and down, a wind cup arranged at the bottom end of the rotating shaft, a turntable arranged in the upper middle part of the rotating shaft, and a rotating connecting rod assembly arranged at the upper part of the rotating shaft and located above the turntable, and the support member cooperates with the turntable.

[0010] The rotating connecting assembly includes an upper connecting rod and a lower connecting rod hinged to each other and a sliding sleeve mounted on the rotating shaft, the upper end of the upper connecting rod is fixedly hinged to the top of the central shaft, and the lower end of the lower connecting rod is hinged to the sliding sleeve that can slide up and down along the central shaft; the sliding sleeve is connected to the turntable.

[0011] The upper connecting rod is also provided with a counterweight block, and the position of the counterweight block can be adjusted on the upper connecting rod.

[0012] The vertical slide bar is connected in series to the lifting bracket and is provided with two retaining rings located on the upper and lower sides of the lifting bracket; through the lifting and lowering of the lifting bracket, it can selectively contact one of the retaining rings to achieve the purpose of pushing the vertical slide bar up and down.

[0013] The vertical slide bar is provided with a vertical slide bar auxiliary positioning device, and the slide bar auxiliary positioning device includes a vertical slide bar provided on the vertical slide bar. A power assist plate with guide grooves on the side, A booster bracket mounted on the frame, a driving rod supported and mounted by the booster bracket, and a spring sleeved on the driving rod for driving the rod to move relative to the vertical slide rod, wherein the end of the driving rod is provided with a limited position In the guide groove Turn the pin.

[0014] The guide groove is a V-shaped groove consisting of an upper inclined groove and a lower inclined groove, wherein the upper inclined groove moves away from the vertical slide bar from top to bottom, and the lower inclined groove moves closer to the vertical slide bar from top to bottom, and the inclination angle of the lower inclined groove relative to the axis of the vertical slide bar is greater than the inclination angle of the upper inclined groove relative to the axis of the vertical slide bar, and there is a smooth transition between the lower inclined groove and the upper inclined groove.

[0015] The frame is provided with a vertically arranged inner support tube, the cross-section of which is an elliptical structure and can make the inner support tube contact with the inner surface of the blinds through a large diameter when the blinds are in a display state; and can make the inner support tube contact with the edge of the blinds through a small diameter when the blades of the blinds are in a folded state.

[0016] The center of the inner support tube is provided with a driving shaft, and the driving shaft is connected to the vertical sliding rod through a rotating driving device, so that the inner support tube can be rotated under the action of the vertical sliding rod.

[0017] The advantages of the present invention are:

[0018] (1) The flipping state of the blinds can be adjusted according to the wind force. When the wind is strong, the blinds flip to make the entire billboard hollow, greatly reducing the lateral force of the wind on the billboard. When the wind is weak, the billboard can be in a normal display state, thus solving the technical problem of the existing technology that billboards rely on increasing structural strength to achieve strong wind resistance.

[0019] (2) The designed vertical slide rod auxiliary positioning device can apply an upward or downward force to the vertical slide rod according to the actual situation, avoiding the defect of frequent flipping of the blinds and keeping the blinds in the display or folded state as much as possible. When the wind force is unstable, the frequency of blinds flipping can be reduced.

[0020] (3) The whole device does not require external power supply and is particularly suitable for use in areas without electricity, such as beside highways and in mountainous areas. It has a wide range of applications and good application prospects.

[0021] (4) By vertically setting an inner support tube with an elliptical cross-section in the frame, the inner support tube can collide with the inner surface of the blind through a large diameter when the blind is in the display state; and can collide with the edge of the blind through a small diameter when the blades of the blind are in the folded state, thereby improving the stability and reliability of use.

[0022] (5) Through the structural design of the shutter drive plate, only one power input is needed to drive all the blades of the shutter to move synchronously. The driving method is simple and easy and not prone to failure, thus ensuring the reliability of use.

[0023] (6) By designing a pneumatic device with a special structure that cooperates with the lifting and pushing device, the lifting and pushing device can be used to make the shutter driving plate move up and down as long as the pneumatic device rotates freely. In particular, the rotating connecting rod assembly arranged on the upper part of the rotating shaft and located above the turntable can use the centrifugal force generated by the rotation of the rotating connecting rod itself to drive the sliding sleeve to move, thereby ensuring the reliability of power output. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the overall structure of the large wind-resistant billboard of the present invention;

[0025] Figure 2 yes Figure 1 A partial enlarged view of

[0026] Figure 3 It is a schematic diagram of the structure of the installation state of the power-assisting plate and the vertical sliding rod in the present invention;

[0027] Figure 4 is a schematic diagram of a state in which the louver is parallel to the surface of the frame in the present invention;

[0028] Figure 5 It is a schematic diagram of a state in which the shutters of the present invention are perpendicular to the surface of the frame;

[0029] Figure 6 It is a partial structural schematic diagram of the bottom perspective of the large wind-resistant billboard of the present invention;

[0030] Figure 7 It is a schematic diagram of the partial installation structure of the inner support cylinder in the present invention;

[0031] In the attached drawings: 1-frame; 2-louver; 3-louver drive plate; 4-vertical slide bar; 5-auxiliary bracket; 6-rotating shaft; 7-rotating connecting rod assembly; 8-lifting bracket; 11-frame base; 12-swinging bracket; 14-inner support tube; 15-gear; 16-rack; 21-swing arm; 31-ear plate; 32-transverse groove; 41-power plate; 41a-upper inclined groove; 41b-lower inclined groove; 42-power bracket; 43-rotating pin; 44-pull rod; 45-spring; 46-lower operating rod; 47-retaining ring; 51-installing sleeve; 61-wind cup; 62-turntable; 71-upper connecting rod; 72-lower connecting rod; 73-counterweight; 74-sliding sleeve; 81-telescopic rod; 82-support member. DETAILED DESCRIPTION

[0032] The present invention will be further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0033] The large wind-resistant billboard of the present invention comprises a frame 1, a plurality of blinds 2 installed in the frame 1 for carrying advertising information, and a blind driving device for driving the blinds 2 to move. The bottom of the frame 1 usually has a frame base 11, and the bottom of the frame base 11 usually has a column or other fixed structure. As can be seen from the figure, in this embodiment, the front surface and the back surface (the two sides of the display surface are defined as the front surface and the back surface) of the frame 1 are respectively provided with a group of blinds 2, and advertising information can be pasted or printed on the outer surface of the blinds. The blind driving device comprises a pneumatic device, a lifting and pushing device driven by the pneumatic device to lift and lower, and a blind driving plate 3 driven by the lifting and pushing device to lift and lower so as to slide up and down. The left and right ends of each blade of each group of blinds 2 ( Figure 1The left and right sides of the direction shown are defined as the left and right ends of the blades) are installed on the frame 1 through a rotating shaft and a swing arm 21 is hinged on the rotating shaft at the right end. The louver driving plate 3 is arranged with transverse grooves 32 corresponding to the positions of each blade of each group of louvers 2. The ends of each swing arm 21 are inserted into the corresponding transverse grooves 32. Therefore, when the louver driving plate 3 slides up and down, the swing arm 21 can move in the transverse groove 32 to drive each blade of the louver 2 to rotate around the rotating shaft. The wind speed value is set as follows: the speed setting value of V0 is usually 4-5m / s, the speed setting value of V1 is usually 8.0-12.0 m / s, and the speed setting value of V2 is usually 15-17 The speed setting values ​​of V3 are usually .5-7.0m / s. When the external wind speed is less than the wind speed required for display, that is, the setting value V1, the lateral force exerted by the wind on the billboard is small, that is, the strength of the 5-level wind, so the blinds 2 do not need to be flipped, then the two groups of blinds 2 are in a state parallel to the front and back surfaces of the frame 1, and the advertising information on the blinds 2 is displayed normally, so it is called the "display state". When the external wind speed is greater than the wind speed required for folding, that is, the setting value V2, that is, the strength of the 7-8 level wind, then the two groups of blinds are in a state parallel to the front and back surfaces of the frame 1, and the advertising information on the blinds 2 is displayed normally, so it is called the "display state". The leaves 2 are in a state perpendicular to the front and back surfaces of the frame 1, which is called the "folded state". At this time, the airflow can pass through the entire billboard from the gaps in the blinds, and the lateral force of the wind on the billboard is greatly weakened. In practical applications, the value of V2 can be adjusted, but V2 is definitely greater than V1. Then when the wind force is between V1 and V2, the blinds 2 switch back and forth between the "display state" and the "folded state". It should be noted that the blinds drive plate 3 can only drive the blinds 2 to rotate 90 degrees, which can be achieved by setting a conventional limit structure. When the external wind speed is less than the set value V0, the blinds drive plate 3 is in a low position (relatively low position); when the external wind speed is greater than the set value V2, the blinds drive plate 3 is in a high position.

[0034] The determination of the above wind speed values ​​is mainly determined by the parameters of the rotating connecting rod assembly 7, the lifting bracket 8, the wind cup 61, and the deadweight of the lifting bracket 8 and the vertical slide bar 4. For example, if the windward area of ​​the wind cup 61 is large, then the torque generated during rotation is relatively large, and the above wind speed values ​​may be relatively small; for another example: if the upper connecting rod 71 and the lower connecting rod 72 of the connecting rod in the rotating connecting rod assembly 7 are long or have a large mass, then the centrifugal force generated during rotation is also relatively large, and the above wind speed values ​​are relatively small. In actual applications, the wind speed value can be adjusted by adjusting the position of the counterweight block 73 relative to the upper connecting rod 71. When the counterweight block 73 is closer to the hinge point between the upper connecting rod 71 and the lower connecting rod 72, the above wind speed value becomes relatively small.

[0035] Furthermore, an auxiliary bracket 5 is also provided at one end of the frame 1. The lifting and pushing device includes a lifting component installed on the auxiliary bracket 5 and capable of being lifted and lowered relative to the auxiliary bracket 5, a lifting bracket 8 installed on the lifting component, a support member 82 provided on the lifting bracket 8 for cooperating with a pneumatic device, and a vertical slide bar 4 installed in cooperation with the lifting bracket 8. The louver driving plate 3 is connected to the vertical slide bar 4 through an ear plate 31. The vertical slide bar 4 and the louver driving plate 3 are in a synchronous lifting relationship, and therefore are fixedly connected, so that the louver driving plate 3 can be driven to lift and lower synchronously through the vertical slide bar 4; during installation, the vertical slide bar 4 is connected in series in the mounting hole designed on the lifting bracket 8, and two retaining rings 47 located on the upper and lower sides of the lifting bracket 8 are provided on the vertical slide bar 4; through the lifting and lowering of the lifting bracket 8, it can selectively contact one of the retaining rings 47 to achieve the purpose of pushing the vertical slide bar 4 up and down. Specifically, when the external wind speed is less than V0 , the lifting bracket 8 is between the two retaining rings 47 and does not contact the retaining ring 47 at the upper end of the lifting bracket 8. When the external wind speed is greater than V1, the lifting bracket 8 pushes the vertical slide bar 4 to move upward through the retaining ring 47 at the upper end, and the vertical slide bar 4, the louver driving plate 3, and the louver 2 are in a state of synchronous movement, so the louver 2 may flip over, but when the wind speed does not exceed the set value V2, the louver 2 cannot flip to a fully folded state. When the external wind speed is less than the set value V3 (the set value V3 is less than the set value V1), the lifting bracket 8 pulls the vertical slide bar 4 downward through the retaining ring 47 at the lower end of the lifting bracket 8 until all the louvers 2 are in a display state. In addition, in the present embodiment, the lifting assembly can be two groups of telescopic sleeves respectively composed of a sleeve and a telescopic rod arranged in the sleeve. The lifting bracket 8 in each telescopic sleeve is fixedly mounted on the top of the telescopic rod 81, and the sleeve in each telescopic sleeve is fixedly mounted on the auxiliary bracket 5.

[0036] Furthermore, the pneumatic device includes a mounting sleeve 51 installed on the auxiliary bracket 5, a rotating shaft 6 that can rotate freely and slide up and down and is arranged in the mounting sleeve 51, a wind cup 61 arranged at the bottom end of the rotating shaft 6, a turntable 62 arranged in the upper middle part of the rotating shaft 6, and a rotating connecting rod assembly 7 located above the turntable and arranged on the upper part of the rotating shaft 6. The support member 82 is installed in cooperation with the turntable 62. As can be seen from the figure, the turntable 62 is arranged between the two support members 82 and there is almost no gap between the support member 82 and the turntable 62, so that it can be ensured that the turntable 62 and the lifting bracket 8 are in a synchronous lifting relationship.

[0037] In addition, the rotating connecting assembly 7 includes an upper connecting rod 71 and a lower connecting rod 72 hinged to each other and a sliding sleeve 74 mounted on the rotating shaft 6. The upper end of the upper connecting rod 71 is fixedly hinged to the top of the rotating shaft 6, and the lower end of the lower connecting rod 72 is hinged to the sliding sleeve 74 that can slide up and down along the rotating shaft 6. The sliding sleeve 74 is connected to the turntable 62. In this way, when the rotating shaft 6 is driven to rotate by the wind cup 1, the rotating connecting rod assembly 7 can pull the sliding sleeve 74 upward along the rotating shaft due to the centrifugal force generated by its own rotation. When the sliding sleeve 74 is pulled upward, the angle between the upper connecting rod 71 and the lower connecting rod 72 will become smaller, and then the actual turning radius of the upper connecting rod 71 and the lower connecting rod 72 will increase, but at this time the angle of the lower connecting rod 72 relative to the rotating shaft 6 will also increase. Therefore, the actual upward pulling force generated on the sliding sleeve 74 is still nearly linear with the rotation speed of the rotating shaft.

[0038] Furthermore, in order to adjust the lifting force generated on the sliding sleeve 74 when the rotating connecting rod assembly 7 rotates, in this embodiment, the upper connecting rod 71 is also provided with a counterweight block 73. Specifically, the counterweight block 73 can be mounted on the upper connecting rod 71, so that the position of the upper connecting rod 71 can be adjusted. The specific adjustment method can adopt any one of the existing technologies. When the counterweight block 73 is closer to the hinge point between the upper connecting rod 71 and the lower connecting rod 72, at the same rotation speed, the actual rotation radius of the sliding sleeve 74 is relatively large, and the lifting force generated by the rotating connecting rod assembly 7 is relatively large; conversely, the lifting force generated by the rotating connecting rod assembly 7 is relatively small.

[0039] If the up and down sliding of the shutter driving plate 3 is always synchronized with the turntable 62, the consequence is that the shutter 2 swings repeatedly, seriously affecting the display effect of the billboard. Therefore, in this embodiment, the vertical slide bar 4 and the lifting bracket 8 are used to achieve stable flipping of the shutter 2. In order to ensure stability, in this embodiment, a vertical slide bar auxiliary positioning device is also provided on the vertical slide bar 4. As shown in the figure, the slide bar auxiliary positioning device includes a vertical slide bar 4. The side has guide A power plate 41 to the groove, A booster bracket 42 mounted on the frame 1, a driving rod 44 supported and mounted by the booster bracket 42, and a spring 45 sleeved on the driving rod 44 for driving the rod 44 to move relative to the vertical slide rod 4, are composed of Figure 2 It can be seen that the spring 45 is sleeved on the driving rod 44 and pressed on the outer end surface of the booster bracket 42. The end of the driving rod 44 is installed with a limited position through a U-shaped plate. In the guide groove The guide groove is a V-shaped groove formed by connecting an upper inclined groove 41a and a lower inclined groove 41b. The upper inclined groove 41a is away from the vertical slide bar 4 from top to bottom, and the lower inclined groove 41b is close to the vertical slide bar 4 from top to bottom. The inclination angle of the lower inclined groove 41b relative to the axis of the vertical slide bar 4 is ( Figure 3The angle B in the upper inclined groove 41a is greater than the inclination angle ( Figure 3 Angle A in the middle), and in order to ensure the smooth passage of the rotating pin 43, a smooth transition is made between the lower inclined groove 41b and the upper inclined groove 41a, which can be achieved by an arc transition. The reason why the inclination angle of the lower inclined groove 41b relative to the axis of the vertical slide bar 4 is relatively large is because the vertical slide bar 4 and the shutter drive plate 3 have a certain deadweight. In practical applications, it is best to set a corresponding counterweight structure for the two to offset part of the gravity of the vertical slide bar 4, the shutter drive plate 3, the turntable 62 and the lifting bracket 8. When the shutter drive plate 3 is in a high position, the rotating pin 43 is at the bottom of the lower inclined groove 41b, and when the shutter drive plate 3 is in a low position, the rotating pin 43 is at the highest point of the upper inclined groove 41a.

[0040] Furthermore, since the length of the blinds 2 is usually long, for example, a large billboard may be more than ten meters wide, it is necessary to ensure that the blinds 2 are kept in a straight state as much as possible. Therefore, the frame 1 of this embodiment has a vertically arranged inner support tube 14, and the cross-section of the inner support tube 14 is an elliptical structure and can make the inner support tube 14 contact with the inner surface of the blinds 2 through the large diameter when the blinds 2 are in the display state; when the blades of the blinds 2 are in the folded state, the inner support tube 14 contacts with the edge of the blinds 2 through the small diameter to avoid deformation as much as possible. The specific implementation structure is: the center of the inner support tube 14 has a The driving shaft in the frame is connected to the vertical slide bar 4 through a rotation driving device, so that the inner support tube 14 can be rotated under the action of the vertical slide bar 4, wherein the rotation driving device includes a swing bracket 12, a rack 16 and a gear 15 connected to the bottom of the driving shaft. It can be seen from the figure that the swing bracket 12 is L-shaped, and its inflection point is hinged on the frame base 11. The bottom of the vertical slide bar 4 is hinged to one end of the swing bracket 12, and the other end of the swing bracket 12 is connected to the rack 16. The rack 1 is meshed with the gear 15. In this way, when the vertical slide bar 4 moves up and down, the inner support tube 14 can be driven to rotate by the above-mentioned rotation driving device.

[0041] Here’s how it works:

[0042] During operation, when there is wind outside, the wind force drives the turntable 62 and the rotating link assembly 7 to rotate synchronously through the wind cup 61. When the rotating link assembly 7 rotates, the upper link 71 and the lower link 72 exert an upward pulling force on the turntable 62 under the action of centrifugal force. If the wind force is too small, the turntable 62 will not rise. When the wind force rises slightly, the turntable 62 drives the lifting bracket 8 to move upward. If the wind force does not exceed the set value V0, the lifting bracket 8 does not contact the retaining ring 47, and therefore will not drive the vertical slide rod 4 upward. Movement, when the wind force continues to increase to be greater than the set value V1, but does not exceed V2, the lifting bracket 8 pushes the vertical slide bar 4 to move upward through the retaining ring 47 at the upper end, and the vertical slide bar 4, the shutter drive plate 3, and the shutter 2 are in a state of synchronous movement, but the weight of the vertical slide bar 4, the shutter drive plate 3, the lifting bracket 8, and the rotating pin 43 exert a downward force on the vertical slide bar 4 through the upper inclined groove 41a. Therefore, when the wind force does not exceed the set value V2, the rotating pin 43 will not enter the lower inclined groove 41b. When the wind force exceeds the set value V2, the rotating pin 43 enters the lower inclined groove 41b ( Figure 5 State), at this time, the rotating pin shaft 43 applies an upward force to the vertical slide rod 4, and the louver driving plate 3 drives the louver 2 to a fully folded state. At this time, the louver 2 is in a horizontal state, and the entire billboard is in a hollow state. The airflow passes through the louver 2, which can greatly reduce the lateral force on the billboard.

[0043] When the wind force drops to a certain level, i.e., the set value V3, under the action of the self-weight of the vertical slide bar 4, the shutter driving plate 3, and the lifting bracket 8, the vertical slide bar 4 moves downward, and the upper inclined groove 41a cooperates with the rotating pin shaft 43 to apply a downward force to the vertical slide bar 4, so that the shutter 2 returns to the display state.

[0044] The reason why the setting value V3 is less than the setting value V1, that is, the wind force for the blinds 2 to recover from the fully folded state to the display state is much smaller than the wind force required for the blinds 2 to start flipping, is mainly because the vertical sliding rod 4, the blinds driving plate 3, the lifting bracket 8, the turntable 2, etc. have a certain self-weight, and when the rotating pin 43 acts on the lower inclined groove 41b, due to the large inclination angle of the lower inclined groove 41b, it can offset the above-mentioned self-weight to a certain extent.

[0045] It should be noted that during the rotation of the inner support tube 14, it is necessary to avoid jamming between the inner support tube 14 and the louver 2. At the same time, the turntable 62 should preferably have a certain mass (if the mass is too large, it should have a corresponding counterweight structure) to increase its moment of inertia, so as to reduce the impact of unstable wind speed as much as possible and make the rotation speed more stable.

[0046] In practical applications, a configuration structure with a mass completely equal to that of the vertical slide bar 4, the shutter drive plate 3, the lifting bracket 8, and the turntable 2 can be set to completely offset the gravity of the above four, so that they are not affected by gravity, and the inclination angles of the lower inclined groove 41b and the upper inclined groove 41a are designed to be equal. If this design is adopted, the relationship between the above V0, V1, V2, and V3 will change accordingly, and the specific description will not be expanded.

[0047] In order to facilitate the operation of the blinds on the ground, a lower operating rod 46 is provided at the lower end of the vertical slide rod 4. The lower operating rod 46 has a hanging hole, in which a hook can be temporarily connected, so that personnel can pull or push the vertical slide rod 4 on the ground.

[0048] Compared with the prior art, this embodiment can adjust the flipping state of the blinds 2 according to the wind force. When the wind force is strong, all the blinds 2 flip to make the entire billboard hollow, greatly reducing the lateral force of the wind on the billboard. When the wind force is weak, the billboard can be in a normal display state. In this embodiment, there is a certain vertical gap between the vertical slide bar 4 and the lifting bracket 8, and the slide bar auxiliary positioning device can apply an upward or downward force to the vertical slide bar 4 according to the actual situation, avoiding the defect of frequent flipping of the blinds 2, and keeping the blinds 2 in the display or folding state as much as possible. When the wind force is unstable, the frequency of flipping of the blinds 2 can be reduced.

[0049] The above are only preferred embodiments of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A large wind-resistant billboard, characterized in that: It comprises a frame (1), a plurality of blinds (2) installed in the frame (1) for carrying advertising information, and a blind driving device for driving the blinds (2) to move; when the external wind speed is less than the wind speed required for display, the blind driving device can put the blinds (2) in a display state; when the external wind speed is greater than the wind speed required for folding, the blind driving device can put each blade of the blind (2) in a folded state; The shutter driving device comprises a pneumatic device, a lifting and pushing device driven by the pneumatic device to move up and down, and a shutter driving plate (3) driven by the lifting and pushing device to move up and down so as to slide up and down, wherein the shutter driving plate (3) cooperates with the shutter (2) to move the shutter (2); An auxiliary bracket (5) is also provided at one end of the frame (1), and the lifting and pushing device comprises a lifting component mounted on the auxiliary bracket (5) and capable of lifting relative to the auxiliary bracket (5), a lifting bracket (8) mounted on the lifting component, a support member (82) provided on the lifting bracket (8) and used for cooperating with the pneumatic device, and a vertical slide bar (4) mounted in cooperation with the lifting bracket (8), wherein the vertical slide bar (4) is fixedly connected to the shutter drive plate (3) and can drive the shutter drive plate (3) to lift and lower; The pneumatic device comprises a mounting sleeve (51) mounted on the auxiliary bracket (5), a rotating shaft (6) arranged in the mounting sleeve (51) and capable of freely rotating and sliding up and down, a wind cup (61) arranged at the bottom end of the rotating shaft (6), a rotating disk (62) arranged in the middle and upper part of the rotating shaft (6), and a rotating connecting rod assembly (7) arranged on the upper part of the rotating shaft (6) and located above the rotating disk, wherein the support member (82) cooperates with the rotating disk (62); The rotating link assembly (7) comprises an upper link (71) and a lower link (72) which are hinged to each other, and a sliding sleeve (74) sleeved on the rotating shaft (6); the upper end of the upper link (71) is fixedly hinged to the top of the rotating shaft (6), and the lower end of the lower link (72) is hinged to the sliding sleeve (74) which can slide up and down along the rotating shaft (6); the sliding sleeve (74) is connected to the rotating disk (62); The upper connecting rod (71) is further provided with a counterweight block (73), and the counterweight block (73) can be adjusted in position on the upper connecting rod (71); The vertical slide bar (4) is connected in series to the lifting bracket (8) and is provided with two retaining rings (47) located on the upper and lower sides of the lifting bracket (8); the lifting bracket (8) can selectively contact one of the retaining rings (47) to achieve the purpose of pushing the vertical slide bar (4) up and down; The vertical slide bar (4) is provided with a vertical slide bar auxiliary positioning device, and the slide bar auxiliary positioning device comprises a vertical slide bar (4) A power assist plate (41) with a guide groove on the side, A booster bracket (42) mounted on the frame (1), a driving rod (44) supported and mounted by the booster bracket (42), and a spring (45) sleeved on the driving rod (44) for driving the rod (44) to move relative to the vertical slide rod (4), wherein the end of the driving rod (44) is provided with a limited position. In the guide groove of Turn the pin (43).

2. The large wind-resistant billboard according to claim 1, characterized in that: The shutter drive plate (3) is provided with transverse grooves (32) corresponding to the positions of the blades of the shutter (2); both ends of the blades of the shutter (2) are mounted on the frame (1) via a rotating shaft, and a swing arm (21) is hingedly connected to the rotating shaft at one end, and the ends of the swing arms (21) are inserted into the corresponding transverse grooves (32).

3. The large wind-resistant billboard according to claim 2, characterized in that: The guide groove is a V-shaped groove consisting of an upper inclined groove (41a) and a lower inclined groove (41b), wherein the upper inclined groove (41a) is gradually away from the vertical slide bar (4) from top to bottom, and the lower inclined groove (41b) is gradually close to the vertical slide bar (4) from top to bottom, and the inclination angle of the lower inclined groove (41b) relative to the axis of the vertical slide bar (4) is greater than the inclination angle of the upper inclined groove (41a) relative to the axis of the vertical slide bar (4), and there is a smooth transition between the lower inclined groove (41b) and the upper inclined groove (41a).

4. The large wind-resistant billboard according to claim 3, characterized in that: The frame (1) has an inner support tube (14) arranged vertically therein. The cross section of the inner support tube (14) is an elliptical structure and can make the inner support tube (14) contact the inner surface of the blind (2) through a large diameter when the blind (2) is in a display state; and make the inner support tube (14) contact the edge of the blind (2) through a small diameter when the blades of the blind (2) are in a folded state.

5. The large wind-resistant billboard according to claim 4, characterized in that: The center of the inner support cylinder (14) is provided with a driving shaft, and the driving shaft is connected to the vertical sliding rod (4) via a rotation driving device, so that the inner support cylinder (14) can be rotated under the action of the vertical sliding rod (4).

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