CN111992365A

CN111992365A - Billboard renovates device

Info

Publication number: CN111992365A
Application number: CN202010840474.2A
Authority: CN
Inventors: 张云国
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-08-20
Filing date: 2020-08-20
Publication date: 2020-11-27

Abstract

The invention relates to the field of advertisements, in particular to a billboard retreading device. The technical problems of the invention are as follows: provided is a billboard retreading device. The technical scheme is as follows: a billboard retreading device comprises a supporting mechanism, a control screen, a shade mechanism and a spraying mechanism; the supporting mechanism is connected with the control screen; the supporting mechanism is connected with the shade mechanism; the supporting mechanism is connected with the spraying mechanism; the shade mechanism is connected with the spraying mechanism. The invention realizes the shielding and manual coating matching with the fonts on the billboard, and can match the shielding and spraying matching with the paint colors of different cross bars, thereby realizing the quick renovation of the billboard and being suitable for the spraying of the cross bar billboard with different color layouts.

Description

Billboard renovates device

Technical Field

The invention relates to the field of advertisements, in particular to a billboard retreading device.

Background

A store, i.e., a shop, is a place where a merchant conducts a trading activity. The places of business of the stores are called "storefronts" and "storefronts". A bar-shaped shop signboard can be arranged on a general storefront to obviously display the store name and the sales commodity. In a busy commercial district, consumers often browse various large and small shop signboards to find commercial service places which achieve their purchase targets or are worth visiting. Thus, shop signboards with high generalization and strong appeal; visual stimulation and psychological impact on the consumer is important;

in the existing shop planning, in order to ensure the regularity of roads and the integral beauty of shops, the same billboard frame is often adopted as a main frame; more standard planning can also require the names, fonts, colors, sizes and the like of stores to be unified; the existing integral billboard frame main frame is generally formed by combining a plurality of transverse cross bars, and then a complete billboard is formed by combining the shop name, logo and the like designed by a shop; but because its horizontal pole is the later stage and colors, the horizontal pole can fade after long-time wind blows the sun and drenches with rain, needs the manual work to paint again, but around the shop name during the japanning, the inside horizontal pole position that corresponds the rear side is difficult to the japanning, still leads to the shop name to be paintd by paint easily, leads to the bill-board not pleasing to the eye, influences the whole image in shop.

Disclosure of Invention

In order to overcome the defect that the existing integral billboard frame main frame is generally formed by combining a plurality of transverse cross bars, and then a complete billboard is formed by combining the shop name, logo and the like designed by a shop; but because its horizontal pole is colored for the later stage, the horizontal pole can fade after long-time wind blows the sun and drenches with rain, needs the manual work to paint again, but around the shop name during the japanning, the inside horizontal pole position that corresponds the rear side is difficult to the japanning, still leads to the shop name to be paintd by paint easily, leads to the bill-board not pleasing to the eye, influences the whole visual shortcoming in shop, technical problem: provided is a billboard retreading device.

The technical scheme is as follows: a billboard retreading device comprises a supporting mechanism, a control screen, a shade mechanism and a spraying mechanism; the supporting mechanism is connected with the control screen; the supporting mechanism is connected with the shade mechanism; the supporting mechanism is connected with the spraying mechanism; the shade mechanism is connected with the spraying mechanism.

Preferably, the supporting mechanism further comprises a bottom plate, a first universal wheel, a second universal wheel, a first telescopic frame, a first sliding block, a second telescopic frame, a second sliding block, a first supporting frame, a first screw rod, a first fixed sliding rod, a first bevel gear, a second bevel gear, a first transmission rod and a first transmission wheel; one side below the bottom plate is connected with the first universal wheel through a bolt; the other side of the lower part of the bottom plate is connected with a second universal wheel through a bolt; one side above the bottom plate is connected with the first telescopic frame; the other side above the bottom plate is connected with a second telescopic frame; the first telescopic frame is rotatably connected with the first sliding block; the second telescopic frame is rotatably connected with the second sliding block; the outer surface of the first screw rod is in screwed connection with the first sliding block and the second sliding block; one side of the second telescopic frame, which is far away from the second sliding block, is rotatably connected with the first supporting frame; one side of the first telescopic frame, which is far away from the first sliding block, is rotatably connected with the first supporting frame; the first screw rod is rotatably connected with the first support frame; the first fixing slide bar is inserted into the first support frame and is positioned above the first screw rod; the outer surface of the first fixed sliding rod is in sliding connection with the first sliding block and the second sliding block; the first screw rod is in rotary connection with the first bevel gear; the first bevel gear is meshed with the second bevel gear; the second bevel gear is rotationally connected with the first transmission rod; the first transmission rod is rotationally connected with the first transmission wheel; the middle lower part of the outer surface of the first transmission rod is rotationally connected with the first support frame; the middle upper part of the outer surface of the first transmission rod is connected with the first supporting frame through a hydraulic push rod frame; the first supporting frame is connected with the shade mechanism; the first supporting frame is connected with the spraying mechanism; the first driving wheel is connected with the shade mechanism.

Preferably, the shade mechanism further comprises a first motor, a second transmission wheel, a third transmission wheel, a second transmission rod, a first cylindrical gear, a first support frame, a first electric push rod, a fourth transmission wheel, a third bevel gear, a fourth bevel gear, a second lead screw, a second fixed slide rod, a first slide seat, a second electric push rod, a third telescopic frame, a sleeve frame, a second motor, a third lead screw, a fifth transmission wheel, a third slide block, a first spring, a first sliding sleeve rod, a fourth slide block, a second spring, a second sliding sleeve rod, a first cloth rolling mechanism, a second cloth rolling mechanism, a third cloth rolling mechanism, a sixth transmission wheel, a fourth lead screw, a fifth slide block, a third spring, a third sliding sleeve rod, a sixth slide block, a fourth spring, a fourth sliding sleeve rod, a third fixed slide rod, a fourth fixed slide rod and a fourth cloth rolling mechanism; the output shaft of the first motor is rotationally connected with the second transmission wheel; the outer ring surface of the second driving wheel is in transmission connection with a third driving wheel through a belt; the inner axle center of the third driving wheel is rotationally connected with the second driving rod; the outer surface of the second transmission rod is rotationally connected with the first cylindrical gear; the outer surface of the second transmission rod is rotationally connected with the first support frame; the outer ring surface of the third driving wheel is in transmission connection with the fourth driving wheel through a belt; two sides below the first support frame are respectively provided with a first electric push rod; the inside of the fourth transmission wheel is rotationally connected with the third bevel gear through a rotating shaft; the interior of the fourth driving wheel is rotationally connected with the first support frame through a rotating shaft; the third bevel gear is meshed with the fourth bevel gear; the inner axis of the fourth bevel gear is rotationally connected with the second screw rod; a second fixed sliding rod is arranged above the second screw rod; the outer surfaces of the second screw rod and the second fixed sliding rod are respectively connected with the first sliding seat; two sides above the first sliding seat are respectively provided with a second electric push rod; the middle part above the first sliding seat is rotationally connected with a third telescopic frame; the middle part below the sleeve frame is rotationally connected with the third telescopic frame; two sides below the sleeve frame are respectively connected with a second electric push rod; the side surface of the sleeve frame is connected with a second motor through a bolt; the lower part in the sleeve frame is rotationally connected with a third screw rod; the lower part in the sleeve frame is spliced with a fourth fixed sliding rod, and the fourth fixed sliding rod is positioned above the third screw rod; the third screw rod is rotationally connected with a second motor; the outer surface of the third screw rod is rotationally connected with a fifth driving wheel; a third sliding block and a fourth sliding block are respectively arranged on the outer surfaces of the fourth fixed sliding rod and the third screw rod; the outer surface of the fourth fixed sliding rod is respectively in sliding connection with the first sliding sleeve rod and the second sliding sleeve rod; one side of the first spring is connected with the third sliding block; the other side of the first spring is connected with the first sliding sleeve rod; one side of the second spring is connected with the fourth sliding block; the other side of the second spring is connected with a second sliding sleeve rod; the second spring and the second spring are sleeved with the fourth fixed sliding rod; the outer ring surface of the fifth driving wheel is in transmission connection with the sixth driving wheel through a belt; the inner axis of the sixth transmission wheel is rotationally connected with the fourth screw rod; the outer surface of the fourth screw rod is rotationally connected with the sleeve frame; two ends of a third fixed sliding rod are respectively inserted into the sleeve frame, and the third fixed sliding rod is positioned below the fourth screw rod; the outer surfaces of the fourth screw rod and the third fixed sliding rod are respectively connected with a fifth sliding block and a sixth sliding block; the outer surface of the third fixed sliding rod is respectively connected with the third sliding sleeve rod and the fourth sliding sleeve rod in a sliding manner; one side of the third spring is connected with the fifth sliding block; the other side of the third spring is connected with a third sliding sleeve rod; one side of the fourth spring is connected with the sixth sliding block; the other side of the fourth spring is connected with a fourth sliding sleeve rod; the fourth spring and the fourth spring are sleeved with the third fixed sliding rod; one side above the first sliding sleeve rod is inserted into the first cloth rolling mechanism; the other side above the first sliding sleeve rod is inserted with a third cloth rolling mechanism; one side of the first cloth rolling mechanism, which is far away from the first sliding sleeve rod, is spliced with the second sliding sleeve rod; one side of the third cloth rolling mechanism, which is far away from the first sliding sleeve rod, is spliced with a third sliding sleeve rod; one side of the third sliding sleeve rod, which is far away from the third cloth rolling mechanism, is spliced with the fourth cloth rolling mechanism; one side of the fourth cloth rolling mechanism, which is far away from the third sliding sleeve rod, is spliced with the fourth sliding sleeve rod; one side of the fourth sliding sleeve rod, which is far away from the fourth cloth rolling mechanism, is spliced with the second cloth rolling mechanism; one side of the second cloth rolling mechanism, which is far away from the fourth sliding sleeve rod, is spliced with the second sliding sleeve rod; the outer ring surface of the second driving wheel is in transmission connection with the first driving wheel through a belt; the lower parts of the two first electric push rods are respectively connected with the first supporting frame; the two sides of the outer surface of the second lead screw and the outer surface of the second fixed sliding rod are both connected with the first supporting frame.

Preferably, the spraying mechanism further comprises a second supporting frame, a third electric push rod, a fourth electric push rod, a second cylindrical gear, a seventh transmission wheel, a fifth screw rod, an eighth transmission wheel, a sixth screw rod, a third cylindrical gear, a first shielding plate, a second shielding plate, a baffle plate, a first elastic mechanism, a second elastic mechanism, a guide rail, a second sliding seat, a toothed bar, a connecting rod, a lantern ring, a fifth electric push rod and a spray gun; one side below the second supporting frame is connected with a third electric push rod through a bolt; the other side of the lower part of the second supporting frame is connected with a fourth electric push rod through a bolt; one side of the outer surface of the second support frame is rotationally connected with the fifth screw rod; the other side of the outer surface of the second support frame is rotationally connected with a sixth screw rod; the upper part of the second support frame is inserted into the guide rail; the outer surfaces of the fifth screw rod and the sixth screw rod are respectively screwed with the two sides of the first shielding plate and the second shielding plate; the outer surface of the fifth screw rod is sequentially in rotary connection with the second cylindrical gear and the seventh transmission wheel; one side of the outer surface of the sixth screw rod is rotationally connected with an eighth driving wheel; the other side of the outer surface of the sixth screw rod is rotationally connected with a third cylindrical gear; the outer ring surface of the seventh driving wheel is in transmission connection with the eighth driving wheel through a belt; the inner side of the second support frame is in sliding connection with the baffle; the middle part of one side of the baffle is connected with the first elastic mechanism; the middle part of the other side of the baffle is connected with a second elastic mechanism; the outer surface of the guide rail is in sliding connection with the second sliding seat; the inner side of the second sliding seat is inserted with the rack bar; the toothed bar is inserted into the connecting rod; the lower part of the connecting rod is inserted into the lantern ring; the lower part of the second sliding seat is connected with a spray gun through a bolt; the second sliding seat is connected with a fifth electric push rod through a bolt; the upper part of the fifth electric push rod is inserted with the toothed bar; the lower parts of the third electric push rod and the fourth electric push rod are respectively connected with the first supporting frame.

Preferably, when the first cylindrical gear is meshed with the second cylindrical gear, the second cylindrical gear rotates; when the first cylindrical gear is not engaged with the second cylindrical gear, the second cylindrical gear does not rotate.

Preferably, the third bevel gear and the fourth bevel gear, and the first bevel gear and the second bevel gear are selectively meshed.

Preferably, the first cloth rolling mechanism, the second cloth rolling mechanism, the third cloth rolling mechanism and the fourth cloth rolling mechanism are formed by connecting two winders capable of automatically winding cloth strips with one long cloth strip.

Preferably, the upper side and the lower side of the first elastic mechanism and the second elastic mechanism are both provided with an elastic telescopic block, and springs are arranged in the combination of the elastic telescopic blocks.

The invention has the beneficial effects that: firstly, the invention realizes the shielding matching manual painting of fonts on the billboard, and can match the shielding matching spraying of different cross rod paint colors, thereby realizing the quick renovation of the billboard, and being suitable for the spraying of cross rod billboards with different color layouts.

Secondly, when the billboard renewing device is used, the billboard renewing device is firstly placed at a position to be used and can be placed in a matched manner through the portal frame, the billboard renewing device needs to be stably fixed when placed, then the device is externally connected with a power supply, then a control screen is controlled to operate, a supporting mechanism is firstly adjusted to the position of a cross rod of the corresponding billboard, then a shade mechanism is adjusted to move into an inner cavity of a font on the billboard, so that the cavity is protected, then the cavity on the font on the billboard is manually brushed, and then the positions of the supporting mechanism and the shade mechanism are repeatedly adjusted, so that the cavity in the font on the billboard is manually brushed; and then the spraying mechanism is controlled to spray the cross rods one by one, characters on the billboard can be shielded during spraying, and meanwhile, the cross rods at different positions are shielded in a matching way and are sprayed in a matching way.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural diagram of the supporting mechanism of the present invention;

FIG. 3 is a schematic view of a mask mechanism according to the present invention;

FIG. 4 is a schematic view of the spraying mechanism of the present invention;

FIG. 5 is a schematic view of a portion of the spray mechanism of the present invention;

FIG. 6 is a schematic view of a second support frame portion and a second cover assembly of the present invention;

FIG. 7 is a schematic view of a combined structure of a baffle and a second elastic mechanism of the present invention;

fig. 8 is an enlarged view of region W of the present invention.

Description of reference numerals: 1_ support mechanism, 2_ control panel, 3_ mask mechanism, 4_ spray mechanism, 101_ base plate, 102_ first universal wheel, 103_ second universal wheel, 104_ first telescopic frame, 105_ first slider, 106_ second telescopic frame, 107_ second slider, 108_ first support frame, 109_ first lead screw, 1010_ first fixed slide bar, 1011_ first bevel gear, 1012_ second bevel gear, 1013_ first transmission bar, 1014_ first transmission bar, 301_ first motor, 302_ second transmission bar, 303_ third transmission bar, 304_ second transmission bar, 305_ first cylindrical gear, 306_ first support frame, 307_ first electric push rod, 308_ fourth transmission bar, 309_ third bevel gear, 3010_ fourth bevel gear, 3011_ second lead screw, 3012_ second fixed slide bar, 3013_ first slide, 3014_ second electric push rod, 3015_ third telescopic frame, 3016_ sleeve frame, 3017_ second motor, 3018_ third lead screw, 3019_ fifth transmission wheel, 3020_ third slider, 3021_ first spring, 3022_ first sliding sleeve rod, 3023_ fourth slider, 3024_ second spring, 3025_ second sliding sleeve rod, 3026_ first winding mechanism, 3027_ second winding mechanism, 3028_ third winding mechanism, 3029_ sixth transmission wheel, 3030_ fourth lead screw, 3031_ fifth slider, 3032_ third spring, 3033_ third sliding sleeve rod, 3034_ sixth slider, 3035_ fourth spring, 3036_ fourth sliding sleeve rod, 3037_ third sliding rod, 3038_ fourth sliding rod, 3039_ fourth winding mechanism, 401_ second support frame, 402_ third push rod, 403_ fourth electric push rod, 404_ second cylindrical gear, 405_ seventh transmission wheel, 3018_ fifth transmission wheel, eighth lead screw, 4010_ cylindrical gear, 4011_ second shutter, 4012_ shutter, 4013_ first resilient mechanism, 4014_ second resilient mechanism, 4015_ rail, 4016_ second slide, 4017_ rack bar, 4018_ connecting rod, 4019_ collar, 4020_ fifth electric push rod, 4021_ spray gun.

Detailed Description

The following description is only a preferred embodiment of the present invention, and does not limit the scope of the present invention.

Example 1

A billboard retreading device is shown in figures 1-8 and comprises a supporting mechanism 1, a control screen 2, a shade mechanism 3 and a spraying mechanism 4; the supporting mechanism 1 is connected with the control screen 2; the supporting mechanism 1 is connected with the shade mechanism 3; the supporting mechanism 1 is connected with the spraying mechanism 4; the mask mechanism 3 is connected with the spraying mechanism 4.

When the device is used, the billboard refurbishing device is placed at a position to be used, the device can be placed through the cooperation of a portal frame and needs to be stably fixed when placed, then the device is externally connected with a power supply, then the control screen 2 is controlled to operate, the supporting mechanism 1 is adjusted to the position of the cross rod of the corresponding billboard, then the shielding mechanism 3 is adjusted to move into an inner cavity of a font on the billboard, so that the cavity is protected, then the cavity on the font on the billboard is manually coated, and then the positions of the supporting mechanism 1 and the shielding mechanism 3 are repeatedly adjusted, so that the cavity in the font on the billboard is manually coated; then the spraying mechanism 4 is controlled to spray the cross bars one by one, characters on the billboard can be shielded during spraying, and meanwhile, the cross bars at different positions are shielded in a matching way to be sprayed; the invention realizes the shielding and manual coating matching with the fonts on the billboard, and can match the shielding and spraying matching with the paint colors of different cross bars, thereby realizing the quick renovation of the billboard and being suitable for the spraying of the cross bar billboard with different color layouts.

The supporting mechanism 1 further comprises a bottom plate 101, a first universal wheel 102, a second universal wheel 103, a first telescopic frame 104, a first slide block 105, a second telescopic frame 106, a second slide block 107, a first supporting frame 108, a first screw rod 109, a first fixed slide rod 1010, a first bevel gear 1011, a second bevel gear 1012, a first transmission rod 1013 and a first transmission wheel 1014; one side below the bottom plate 101 is connected with a first universal wheel 102 through a bolt; the other side below the bottom plate 101 is connected with a second universal wheel 103 through a bolt; one side above the bottom plate 101 is connected with a first telescopic frame 104; the other side above the bottom plate 101 is connected with a second telescopic frame 106; the first expansion bracket 104 is rotatably connected with the first slide block 105; the second telescopic frame 106 is rotatably connected with a second sliding block 107; the outer surface of the first screw rod 109 is in screwed connection with the first slide block 105 and the second slide block 107; one side of the second telescopic frame 106, which is far away from the second sliding block 107, is rotatably connected with the first supporting frame 108; the side of the first telescopic frame 104 far away from the first sliding block 105 is rotatably connected with the first supporting frame 108; the first lead screw 109 is rotatably connected with the first support frame 108; the first fixed slide bar 1010 is inserted into the first support frame 108, and the first fixed slide bar 1010 is positioned above the first screw rod 109; the outer surface of the first fixed slide bar 1010 is connected with the first slide block 105 and the second slide block 107 in a sliding way; the first screw 109 is rotatably connected with a first bevel gear 1011; the first bevel gear 1011 meshes with the second bevel gear 1012; second bevel gear 1012 is in rotational communication with first transfer shaft 1013; the first driving lever 1013 is rotationally connected to the first driving wheel 1014; the middle lower part of the outer surface of the first driving rod 1013 is rotatably connected with the first supporting frame 108; the middle upper part of the outer surface of the first transmission rod 1013 is connected with the first support frame 108 through a hydraulic push rod frame; the first support frame 108 is connected to the mask mechanism 3; the first support frame 108 is connected with the spraying mechanism 4; the first driving wheel 1014 is connected to the mask mechanism 3.

When the device is used, the height of the device is required to be controlled to be matched with the billboard cross bars with different heights for spraying and shielding because the billboard has a certain height; therefore, when the height of the lifting device is required, the first universal wheel 102 and the second universal wheel 103 below the bottom plate 101 are kept horizontally placed in advance, so that the bottom plate 101 is kept horizontally, meanwhile, two first universal wheels 102 and two second universal wheels 103 are arranged, four opposite angles below the bottom plate 101 can be simultaneously supported and moved, then the first motor 301 on the shade mechanism 3 is controlled to rotate to drive the second driving wheel 302 to drive the first driving wheel 1014 to rotate, meanwhile, the shade mechanism 3 needs to firstly descend to enable the hydraulic push rod frame on the first supporting frame 108 to descend to drive the first driving rod 1013, and meanwhile, the second bevel gear 1012 is driven to be meshed with the first bevel gear 1011; the first bevel gear 1011 rotates to drive the first screw 109 to rotate to drive the first slider 105 and the second slider 107 to move oppositely under the limit of the first fixed slide bar 1010, the first screw 109 is provided with bidirectional threads, so that the first slider 105 and the second slider 107 can simultaneously drive the first expansion bracket 104 and the second expansion bracket 106 to ascend, and otherwise, the first slider descends and resets; the first telescopic frame 104 and the second telescopic frame 106 can be lifted to drive the first supporting frame 108 to lift at the same time, and drive the mask mechanism 3 and the spraying mechanism 4 to move at the same time; the adjustment and matching renovation of different positions of the matching shade mechanism 3 and the spraying mechanism 4 are realized, and the device can be supported and moved at the same time.

The shade mechanism 3 further includes a first motor 301, a second transmission wheel 302, a third transmission wheel 303, a second transmission rod 304, a first cylindrical gear 305, a first support frame 306, a first electric push rod 307, a fourth transmission wheel 308, a third bevel gear 309, a fourth bevel gear 3010, a second lead screw 3011, a second fixed slide rod 3012, a first slide 3013, a second electric push rod 3014, a third expansion bracket 3015, a sleeve frame 3016, a second motor 3017, a third lead screw 3018, a fifth transmission wheel 3019, a third slider 3020, a first spring 3021, a first sliding sleeve 3022, a fourth slider 3023, a second spring 3024, a second sliding sleeve 3025, a first rolling mechanism 3026, a second rolling mechanism 3027, a third rolling mechanism 3028, a sixth transmission wheel 3029, a fourth lead screw 3030, a fifth slider 3031, a third spring 3032, a third sliding sleeve 3023, a sixth sliding sleeve 3034, a fourth sliding sleeve 3035, a fourth sliding sleeve 3037, a third sliding sleeve 3028, a fourth sliding sleeve 3029, a fourth sliding sleeve 3030, a fourth sliding sleeve 3031, a third sliding sleeve 3032, a, A fourth fixed slide bar 3038 and a fourth cloth rolling mechanism 3039; an output shaft of the first motor 301 is rotationally connected with the second transmission wheel 302; the outer annular surface of the second driving wheel 302 is in transmission connection with a third driving wheel 303 through a belt; the inner axle center of the third driving wheel 303 is rotationally connected with the second driving rod 304; the outer surface of the second transmission rod 304 is rotatably connected with a first cylindrical gear 305; the outer surface of the second transmission rod 304 is rotatably connected with the first support frame 306; the outer annular surface of the third driving wheel 303 is in transmission connection with a fourth driving wheel 308 through a belt; two sides below the first support frame 306 are respectively provided with a first electric push rod 307; the inside of the fourth driving wheel 308 is rotationally connected with a third bevel gear 309 through a rotating shaft; the inside of the fourth transmission wheel 308 is rotationally connected with the first support frame 306 through a rotating shaft; third bevel gear 309 meshes with fourth bevel gear 3010; the inner axis of the fourth bevel gear 3010 is rotatably connected with the second lead screw 3011; a second fixed slide bar 3012 is arranged above the second screw rod 3011; the outer surfaces of the second lead screw 3011 and the second fixed slide 3012 are respectively connected with the first slide 3013; two sides above the first sliding seat 3013 are respectively provided with a second electric push rod 3014; the middle part above the first sliding seat 3013 is rotatably connected with a third telescopic frame 3015; the middle part below the sleeve frame 3016 is rotatably connected with a third telescopic frame 3015; two sides below the sleeve frame 3016 are respectively connected with a second electric push rod 3014; the side surface of the sleeve frame 3016 is connected with a second motor 3017 through bolts; the lower part in the sleeve frame 3016 is rotatably connected with a third screw rod 3018; the inner lower part of the sleeve frame 3016 is spliced with a fourth fixed sliding rod 3038, and the fourth fixed sliding rod 3038 is positioned above the third screw rod 3018; the third screw 3018 is rotatably connected to the second motor 3017; the outer surface of the third screw rod 3018 is rotatably connected with a fifth driving wheel 3019; the outer surfaces of the fourth fixed slide bar 3038 and the third screw rod 3018 are respectively provided with a third slide block 3020 and a fourth slide block 3023; the outer surface of the fourth fixed sliding rod 3038 is respectively connected with the first sliding sleeve rod 3022 and the second sliding sleeve rod 3025 in a sliding manner; one side of the first spring 3021 is connected to the third slider 3020; the other side of the first spring 3021 is connected with a first sliding bush rod 3022; one side of the second spring 3024 is connected to the fourth slider 3023; the other side of the second spring 3024 is connected with a second sliding bush rod 3025; the second spring 3024 and the second spring 3024 are sleeved with the fourth fixed sliding rod 3038; the outer ring surface of the fifth driving wheel 3019 is in transmission connection with a sixth driving wheel 3029 through a belt; the inner axis of the sixth driving wheel 3029 is rotatably connected with the fourth screw rod 3030; the outer surface of the fourth screw rod 3030 is rotatably connected with the sleeve frame 3016; two ends of a third fixed sliding rod 3037 are respectively spliced with the sleeve frame 3016, and the third fixed sliding rod 3037 is positioned below the fourth screw rod 3030; the outer surfaces of the fourth screw rod 3030 and the third fixed slide rod 3037 are respectively connected with a fifth slide block 3031 and a sixth slide block 3034; the outer surface of the third fixed sliding rod 3037 is respectively connected with the third sliding sleeve 3033 and the fourth sliding sleeve 3036 in a sliding way; one side of the third spring 3032 is connected with the fifth slider 3031; the other side of the third spring 3032 is connected with a third sliding sleeve rod 3033; one side of the fourth spring 3035 is connected with the sixth sliding block 3034; the other side of the fourth spring 3035 is connected with a fourth sliding sleeve rod 3036; the fourth spring 3035 and the fourth spring 3035 are sleeved with the third fixed sliding rod 3037; one side above the first sliding sleeve rod 3022 is inserted into the first cloth rolling mechanism 3026; the other side above the first sliding sleeve rod 3022 is inserted into the third cloth rolling mechanism 3028; the side of the first cloth rolling mechanism 3026, which is far away from the first sliding sleeve rod 3022, is inserted into the second sliding sleeve rod 3025; one side of the third cloth rolling mechanism 3028, which is far away from the first sliding sleeve rod 3022, is inserted into the third sliding sleeve rod 3033; one side of the third sliding sleeve rod 3033, which is far away from the third cloth rolling mechanism 3028, is spliced with the fourth cloth rolling mechanism 3039; one side of the fourth cloth rolling mechanism 3039, which is far away from the third sliding sleeve rod 3033, is spliced with the fourth sliding sleeve rod 3036; one side of the fourth sliding sleeve rod 3036, which is far away from the fourth cloth rolling mechanism 3039, is spliced with the second cloth rolling mechanism 3027; one side of the second cloth rolling mechanism 3027, which is far away from the fourth sliding sleeve rod 3036, is spliced with the second sliding sleeve rod 3025; the outer annular surface of the second transmission wheel 302 is in transmission connection with the first transmission wheel 1014 through a belt; the lower parts of the two first electric push rods 307 are respectively connected with the first supporting frame 108; the second lead screw 3011 and the second fixed slide bar 3012 are connected to the first supporting frame 108 on both sides of the outer surface.

When the cross bars around the fonts on the billboard are sprayed, manual brushing is required to be switched, and when the cross bars are brushed, as a plurality of cavities exist in the fonts on the billboard, the first motor 301 drives the second driving wheel 302 to rotate to drive the third driving wheel 303, and the third driving wheel 303 rotates to drive the second driving rod 304 on the first support frame 306 to rotate and simultaneously drive the first cylindrical gear 305 to rotate; the first cylindrical gear 305 can be selectively meshed with the spraying mechanism 4 when rotating; then the third driving wheel 303 drives the fourth driving wheel 308 and the third bevel gear 309 to rotate simultaneously in a rotating manner, and when the two first electric push rods 307 drive the first support frame 306 to ascend, the third bevel gear 309 enables the third bevel gear 309 to be meshed with the fourth bevel gear 3010; the fourth bevel gear 3010 rotates to drive the second lead screw 3011 to rotate, the second lead screw 3011 rotates and can drive the first slide 3013 to move left and right under the coordination of the second fixed slide 3012, finely adjust the position to be protected of the font inner cavity, and then pass through; two second electric push rods 3014 simultaneously extend and retract to drive a third telescopic frame 3015 to move up a sleeve frame 3016, simultaneously, a second motor 3017 rotates to drive a third lead screw 3018 to rotate, simultaneously, a third slider 3020 and a fourth slider 3023 are driven to move oppositely under the coordination of a fourth fixed slide bar 3038, the third lead screw 3018 is provided with reverse double threads, the third slider 3020 and the fourth slider 3023 can drive a first spring 3021 to pull a first sliding sleeve rod 3022 while moving oppositely, the second spring 3024 pulls a second sliding sleeve 3025 to slide on the fourth fixed slide bar 3038 simultaneously, the third lead screw 3018 rotates to drive a fifth transmission wheel 3019 to transmit a sixth transmission wheel 3029 to drive the fourth lead screw 3030 to rotate, the fourth lead screw 3030 rotates under the coordination of the third fixed slide bar 3037 to drive the fifth slider 3031 and the sixth slider 3034 to move oppositely, the fourth lead screw 3030 is provided with reverse double threads, the fifth slider 3031 and the sixth slider 3034 can drive the third sliding sleeve 3033 by pulling the third sliding sleeve 3032 simultaneously, the fourth spring 3035 pulls the fourth sliding sleeve rod 3036 to slide on the third fixed sliding rod 3037, the first sliding sleeve rod 3022, the second sliding sleeve rod 3025, the third sliding sleeve rod 3033 and the fourth sliding sleeve rod 3036 can simultaneously drive the first cloth rolling mechanism 3026, the second cloth rolling mechanism 3027, the third cloth rolling mechanism 3028 and the fourth cloth rolling mechanism 3039 to move when sliding, each of the first cloth rolling mechanism 3026, the second cloth rolling mechanism 3027, the third cloth rolling mechanism 3028 and the fourth cloth rolling mechanism 3039 is formed by connecting two winders capable of automatically rolling cloth strips with one long cloth strip, and the first cloth rolling mechanism 3026, the second cloth rolling mechanism 3027, the third cloth rolling mechanism 3028 and the fourth cloth rolling mechanism 3039 can independently contract and stretch, and the rectangular spring 3021 and the rectangular spring 3024 of the fourth cloth rolling mechanism 3039 can be adjusted by the rectangular spring 3021 and the second spring 3024 because the rectangular spring 3024 is adjusted by the first spring 3024 and the second cloth rolling mechanism 3024 are adjusted by the rectangular spring 3039 When the first cloth rolling mechanism 3026, the second cloth rolling mechanism 3027, the third cloth rolling mechanism 3028, and the fourth cloth rolling mechanism 3039 are moved away from each other from a close state, due to irregular font cavities of the billboard, such as a trapezoid shape, the cooperation of the first spring 3021, the second spring 3024, the third spring 3032, and the fourth spring 3035 enables one side to be sprung open to form protection when the other side is contracted, so that the protection and shielding of the quick adjustment cooperation are realized, and the manual brushing is performed at this time; the protection of different cavities by quick positioning is realized, and the brush coating is matched with manual brushing.

The spraying mechanism 4 further comprises a second support frame 401, a third electric push rod 402, a fourth electric push rod 403, a second cylindrical gear 404, a seventh transmission wheel 405, a fifth screw 406, an eighth transmission wheel 407, a sixth screw 408, a third cylindrical gear 409, a first shielding plate 4010, a second shielding plate 4011, a baffle 4012, a first elastic mechanism 4013, a second elastic mechanism 4014, a guide rail 4015, a second sliding seat 4016, a toothed bar 4017, a connecting rod 4018, a collar 4019, a fifth electric push rod 4020 and a spray gun 4021; one side below the second supporting frame 401 is connected with a third electric push rod 402 through a bolt; the other side below the second supporting frame 401 is connected with a fourth electric push rod 403 through a bolt; one side of the outer surface of the second support frame 401 is rotatably connected with a fifth screw rod 406; the other side of the outer surface of the second supporting frame 401 is rotatably connected with a sixth screw rod 408; the upper part of the second support frame 401 is inserted into the guide rail 4015; the outer surfaces of the fifth screw rod 406 and the sixth screw rod 408 are respectively screwed with the two sides of the first shielding plate 4010 and the second shielding plate 4011; the outer surface of the fifth screw rod 406 is sequentially in rotary connection with the second cylindrical gear 404 and a seventh transmission wheel 405; one side of the outer surface of the sixth screw rod 408 is rotatably connected with an eighth driving wheel 407; the other side of the outer surface of the sixth screw rod 408 is rotationally connected with a third cylindrical gear 409; the outer ring surface of the seventh driving wheel 405 is in transmission connection with an eighth driving wheel 407 through a belt; the inner side of the second support frame 401 is slidably connected with the baffle 4012; the middle part of one side of the baffle 4012 is connected with a first elastic mechanism 4013; the middle part of the other side of the baffle 4012 is connected with a second elastic mechanism 4014; the outer surface of the guide rail 4015 is in sliding connection with a second sliding seat 4016; the inner side of the second sliding seat 4016 is inserted into a rack bar 4017; the toothed bar 4017 is inserted into the connecting bar 4018; the lower part of the connecting rod 4018 is inserted into the lantern ring 4019; the lower part of the second sliding seat 4016 is connected with a spray gun 4021 through a bolt; the second sliding seat 4016 is in bolted connection with a fifth electric push rod 4020; the upper part of the fifth electric push rod 4020 is inserted into the toothed bar 4017; the lower parts of the third electric push rod 402 and the fourth electric push rod 403 are respectively connected with the first support frame 108.

When the spraying of the cross bar needs to be carried out, the third electric push rod 402 and the fourth electric push rod 403 are simultaneously contracted, so that the second supporting frame 401 descends to drive the second cylindrical gear 404 to be meshed with the first cylindrical gear 305, the second cylindrical gear 404 rotates to drive the fifth screw rod 406 to rotate and simultaneously drive the seventh transmission wheel 405 to drive the eighth transmission wheel 407 to rotate, and the eighth transmission wheel 407 rotates to drive the sixth screw rod 408 to rotate; the fifth screw 406 and the sixth screw 408 rotate simultaneously to drive the first shielding plate 4010 and the second shielding plate 4011 to rotate simultaneously and oppositely, the fifth screw 406 and the sixth screw 408 are both provided with double threads, then the first shielding plate 4010 and the second shielding plate 4011 move to shield the transverse rods which are not coated, because on the billboard formed by the transverse rods, the colors of the unified transverse rods can adopt double-color matching, such as the whole is black, but transverse rods with different colors are arranged above and below the height of the billboard, so that the overall format effect of the billboard is increased, shielding can be realized during multi-color coating, at the moment, firstly, the baffle 4012 is moved manually, the baffle 4012 slides on the second support frame 401, the baffle can be moved to the side close to the coating and close to the font of the billboard, through the shade, the side close to the coating and shielding is carried out on the font of the billboard, and simultaneously, in the process of continuously shortening the distance between the first 4010 and the second 4011, the first elastic mechanism 4013 and the second elastic mechanism 4014 on two sides of the baffle 4012 are pressed, the first elastic mechanism 4013 and the second elastic mechanism 4014 are pressed to fix the baffle 4012, then the second sliding seat 4016 on the guide rail 4015 slides to drive the spray gun 4021 to spray the cross bar, meanwhile, when the spraying angle and range need to be adjusted correspondingly, the fifth electric push rod 4020 descends to drive the toothed bar 4017 to drive the connecting rod 4018 to drive the lantern ring 4019 to descend, then the second sliding seat 4016 moves to mesh the toothed bar 4017 with the third cylindrical gear 409, the paint sprayed by the spray gun 4021 is in a wide-mouth shape, the spraying shape can be adjusted through the distance between the lantern ring 4019 and the spray gun 4021, after the distance is adjusted, the fifth electric push rod 4020 ascends to drive the toothed bar 4017 to drive the connecting rod 4018 to drive the lantern ring 4019 to ascend, and the toothed bar 4017 is not meshed with the third cylindrical gear 409; the step of adjusting the spraying distance may be adjusted in cooperation with the movement of the first shutter 4010 and the second shutter 4011; then, shielding protection spraying of different colors and different positions can be realized on the cross rod.

When the first cylindrical gear 305 is engaged with the second cylindrical gear 404, the second cylindrical gear 404 rotates; when the first cylindrical gear 305 is not engaged with the second cylindrical gear 404, the second cylindrical gear 404 is not rotated.

The functions of the supporting mechanism 1 and the spraying mechanism 4 can be switched.

Third bevel gear 309 and fourth bevel gear 3010, first bevel gear 1011 and second bevel gear 1012 are in selective engagement.

The function of the supporting mechanism 1 and the function of the shade mechanism 3 can be switched.

The first cloth rolling mechanism 3026, the second cloth rolling mechanism 3027, the third cloth rolling mechanism 3028, and the fourth cloth rolling mechanism 3039 are formed by connecting two windups capable of automatically winding cloth strips with one long cloth strip.

Independent bidirectional synchronous stretching and retracting can be respectively carried out.

Both sides all are provided with an elastic expansion piece about first elastic mechanism 4013 and the second elastic mechanism 4014, all are provided with the spring in its combination.

Can be shrunk and matched for limiting when stressed.

The above description is only an example of the present invention and is not intended to limit the present invention. All equivalents which come within the spirit of the invention are therefore intended to be embraced therein. Details not described herein are well within the skill of those in the art.

Claims

1. The utility model provides a bill-board renewing device, is including control panel (2), its characterized in that: the device also comprises a supporting mechanism (1), a shade mechanism (3) and a spraying mechanism (4); the supporting mechanism (1) is connected with the control screen (2); the supporting mechanism (1) is connected with the shade mechanism (3); the supporting mechanism (1) is connected with the spraying mechanism (4); the shade mechanism (3) is connected with the spraying mechanism (4).

2. A billboard retreading apparatus as claimed in claim 1, wherein: the supporting mechanism (1) further comprises a bottom plate (101), a first universal wheel (102), a second universal wheel (103), a first telescopic frame (104), a first sliding block (105), a second telescopic frame (106), a second sliding block (107), a first supporting frame (108), a first screw rod (109), a first fixed sliding rod (1010), a first bevel gear (1011), a second bevel gear (1012), a first transmission rod (1013) and a first transmission wheel (1014); one side below the bottom plate (101) is connected with a first universal wheel (102) through a bolt; the other side below the bottom plate (101) is connected with a second universal wheel (103) through a bolt; one side above the bottom plate (101) is connected with a first telescopic frame (104); the other side above the bottom plate (101) is connected with a second telescopic frame (106); the first expansion bracket (104) is rotationally connected with the first sliding block (105); the second telescopic frame (106) is rotatably connected with the second sliding block (107); the outer surface of the first screw rod (109) is in screwed connection with the first sliding block (105) and the second sliding block (107); one side of the second telescopic frame (106) far away from the second sliding block (107) is rotatably connected with the first supporting frame (108); one side of the first telescopic frame (104) far away from the first sliding block (105) is rotatably connected with the first supporting frame (108); the first screw rod (109) is rotationally connected with the first supporting frame (108); the first fixed sliding rod (1010) is inserted into the first supporting frame (108), and the first fixed sliding rod (1010) is positioned above the first screw rod (109); the outer surface of the first fixed slide bar (1010) is in sliding connection with the first slide block (105) and the second slide block (107); the first screw rod (109) is in rotary connection with the first bevel gear (1011); the first bevel gear (1011) is meshed with the second bevel gear (1012); the second bevel gear (1012) is rotationally connected with the first transmission rod (1013); the first transmission rod (1013) is rotationally connected with the first transmission wheel (1014); the middle lower part of the outer surface of the first transmission rod (1013) is rotationally connected with the first supporting frame (108); the upper middle part of the outer surface of the first transmission rod (1013) is connected with the first supporting frame (108) through a hydraulic push rod frame; the first supporting frame (108) is connected with the shade mechanism (3); the first supporting frame (108) is connected with the spraying mechanism (4); the first driving wheel (1014) is connected with the shade mechanism (3).

3. A billboard retreading apparatus as claimed in claim 2, wherein: the shade mechanism (3) further comprises a first motor (301), a second transmission wheel (302), a third transmission wheel (303), a second transmission rod (304), a first cylindrical gear (305), a first support frame (306), a first electric push rod (307), a fourth transmission wheel (308), a third bevel gear (309), a fourth bevel gear (3010), a second lead screw (3011), a second fixed slide rod (3012), a first slide seat (3013), a second electric push rod (3014), a third telescopic frame (3015), a sleeve frame (3016), a second motor (3017), a third lead screw (3018), a fifth transmission wheel (3019), a third slide block (3020), a first spring (3021), a first slide sleeve rod (3022), a fourth slide block (3023), a second spring (3024), a second slide sleeve rod (3025), a first batching mechanism (3026), a second batching mechanism (3027), a third batching mechanism (3028), A sixth transmission wheel (3029), a fourth screw rod (3030), a fifth slider (3031), a third spring (3032), a third sliding sleeve rod (3033), a sixth slider (3034), a fourth spring (3035), a fourth sliding sleeve rod (3036), a third fixed slide rod (3037), a fourth fixed slide rod (3038) and a fourth cloth rolling mechanism (3039); an output shaft of the first motor (301) is rotationally connected with the second transmission wheel (302); the outer ring surface of the second driving wheel (302) is in transmission connection with a third driving wheel (303) through a belt; the inner axle center of the third transmission wheel (303) is rotationally connected with the second transmission rod (304); the outer surface of the second transmission rod (304) is rotationally connected with the first cylindrical gear (305); the outer surface of the second transmission rod (304) is rotationally connected with the first support frame (306); the outer ring surface of the third driving wheel (303) is in transmission connection with a fourth driving wheel (308) through a belt; two sides below the first support frame (306) are respectively provided with a first electric push rod (307); the interior of the fourth transmission wheel (308) is rotationally connected with a third bevel gear (309) through a rotating shaft; the interior of the fourth transmission wheel (308) is rotationally connected with the first support frame (306) through a rotating shaft; the third bevel gear (309) is meshed with the fourth bevel gear (3010); the inner axis of the fourth bevel gear (3010) is rotatably connected with the second screw rod (3011); a second fixed sliding rod (3012) is arranged above the second screw rod (3011); the outer surfaces of the second screw rod (3011) and the second fixed slide rod (3012) are respectively connected with the first sliding seat (3013); two sides above the first sliding seat (3013) are respectively provided with a second electric push rod (3014); the middle part above the first sliding seat (3013) is rotatably connected with a third telescopic frame (3015); the middle part below the sleeve frame (3016) is rotatably connected with a third telescopic frame (3015); two sides below the sleeve frame (3016) are respectively connected with a second electric push rod (3014); the side surface of the sleeve frame (3016) is connected with a second motor (3017) through a bolt; the lower part in the sleeve frame (3016) is rotationally connected with a third screw rod (3018); the lower part in the sleeve frame (3016) is spliced with a fourth fixed sliding rod (3038), and the fourth fixed sliding rod (3038) is positioned above the third screw rod (3018); the third screw rod (3018) is connected with the second motor (3017) in a rotating way; the outer surface of the third screw rod (3018) is rotatably connected with a fifth driving wheel (3019); the outer surfaces of the fourth fixed slide bar (3038) and the third screw rod (3018) are respectively provided with a third slide block (3020) and a fourth slide block (3023); the outer surface of the fourth fixed slide bar (3038) is respectively connected with the first sliding sleeve rod (3022) and the second sliding sleeve rod (3025) in a sliding way; one side of the first spring (3021) is connected with the third slider (3020); the other side of the first spring (3021) is connected with a first sliding sleeve rod (3022); one side of the second spring (3024) is connected with the fourth slider (3023); the other side of the second spring (3024) is connected with a second sliding sleeve rod (3025); the second spring (3024) and the second spring (3024) are sleeved with the fourth fixed sliding rod (3038); the outer ring surface of the fifth driving wheel (3019) is in transmission connection with a sixth driving wheel (3029) through a belt; the inner axis of the sixth driving wheel (3029) is rotationally connected with the fourth screw rod (3030); the outer surface of the fourth screw rod (3030) is rotatably connected with the sleeve frame (3016); two ends of a third fixed sliding rod (3037) are respectively spliced with the sleeve frame (3016), and the third fixed sliding rod (3037) is positioned below the fourth screw rod (3030); the outer surfaces of the fourth screw rod (3030) and the third fixed slide rod (3037) are respectively connected with a fifth slide block (3031) and a sixth slide block (3034); the outer surface of the third fixed slide bar (3037) is respectively connected with the third sliding sleeve bar (3033) and the fourth sliding sleeve bar (3036) in a sliding way; one side of the third spring (3032) is connected with the fifth sliding block (3031); the other side of the third spring (3032) is connected with a third sliding sleeve rod (3033); one side of the fourth spring (3035) is connected with the sixth sliding block (3034); the other side of the fourth spring (3035) is connected with a fourth sliding sleeve rod (3036); the fourth spring (3035) and the fourth spring (3035) are sleeved with the third fixed sliding rod (3037); one side above the first sliding sleeve rod (3022) is inserted into the first cloth rolling mechanism (3026); the other side above the first sliding sleeve rod (3022) is inserted into a third cloth rolling mechanism (3028); one side of the first cloth rolling mechanism (3026) far away from the first sliding sleeve rod (3022) is spliced with the second sliding sleeve rod (3025); one side of the third cloth rolling mechanism (3028) far away from the first sliding sleeve rod (3022) is spliced with a third sliding sleeve rod (3033); one side of the third sliding sleeve rod (3033), which is far away from the third cloth rolling mechanism (3028), is spliced with the fourth cloth rolling mechanism (3039); one side of the fourth cloth rolling mechanism (3039), which is far away from the third sliding sleeve rod (3033), is spliced with the fourth sliding sleeve rod (3036); one side of the fourth sliding sleeve rod (3036), which is far away from the fourth cloth rolling mechanism (3039), is spliced with the second cloth rolling mechanism (3027); one side of the second cloth rolling mechanism (3027) far away from the fourth sliding sleeve rod (3036) is spliced with the second sliding sleeve rod (3025); the outer ring surface of the second driving wheel (302) is in transmission connection with the first driving wheel (1014) through a belt; the lower parts of the two first electric push rods (307) are respectively connected with the first supporting frame (108); the two sides of the outer surfaces of the second screw rod (3011) and the second fixed slide rod (3012) are connected with the first supporting frame (108).

4. A billboard retreading apparatus as claimed in claim 3, wherein: the spraying mechanism (4) further comprises a second supporting frame (401), a third electric push rod (402), a fourth electric push rod (403), a second cylindrical gear (404), a seventh driving wheel (405), a fifth screw rod (406), an eighth driving wheel (407), a sixth screw rod (408), a third cylindrical gear (409), a first shielding plate (4010), a second shielding plate (4011), a baffle plate (4012), a first elastic mechanism (4013), a second elastic mechanism (4014), a guide rail (4015), a second sliding seat (4016), a toothed bar (4017), a connecting rod (4018), a lantern ring (4019), a fifth electric push rod (4020) and a spray gun (4021); one side below the second supporting frame (401) is connected with a third electric push rod (402) through a bolt; the other side of the lower part of the second supporting frame (401) is connected with a fourth electric push rod (403) through a bolt; one side of the outer surface of the second supporting frame (401) is rotatably connected with a fifth screw rod (406); the other side of the outer surface of the second supporting frame (401) is rotatably connected with a sixth screw rod (408); the upper part of the second support frame (401) is inserted into the guide rail (4015); the outer surfaces of the fifth screw rod (406) and the sixth screw rod (408) are respectively in screwed connection with the two sides of the first shielding plate (4010) and the second shielding plate (4011); the outer surface of the fifth screw rod (406) is sequentially and rotatably connected with the second cylindrical gear (404) and the seventh transmission wheel (405); one side of the outer surface of the sixth screw rod (408) is rotationally connected with an eighth driving wheel (407); the other side of the outer surface of the sixth screw rod (408) is rotationally connected with a third cylindrical gear (409); the outer ring surface of the seventh driving wheel (405) is in transmission connection with an eighth driving wheel (407) through a belt; the inner side of the second supporting frame (401) is in sliding connection with the baffle plate (4012); the middle part of one side of the baffle plate (4012) is connected with a first elastic mechanism (4013); the middle part of the other side of the baffle plate (4012) is connected with a second elastic mechanism (4014); the outer surface of the guide rail (4015) is in sliding connection with a second sliding seat (4016); the inner side of the second sliding seat (4016) is inserted into the rack bar (4017); the toothed bar (4017) is inserted into the connecting bar (4018); the lower part of the connecting rod (4018) is inserted into the lantern ring (4019); the lower part of the second sliding seat (4016) is connected with a spray gun (4021) through a bolt; the second sliding seat (4016) is in bolted connection with a fifth electric push rod (4020); the upper part of the fifth electric push rod (4020) is inserted into the rack bar (4017); the lower parts of the third electric push rod (402) and the fourth electric push rod (403) are respectively connected with the first supporting frame (108).

5. A billboard retreading apparatus as claimed in claim 4, wherein: when the first cylindrical gear (305) is meshed with the second cylindrical gear (404), the second cylindrical gear (404) rotates; when the first cylindrical gear (305) is not engaged with the second cylindrical gear (404), the second cylindrical gear (404) is not rotated.

6. A billboard retreading apparatus as claimed in claim 5, wherein: a third bevel gear (309) and a fourth bevel gear (3010), wherein the first bevel gear (1011) and the second bevel gear (1012) are selectively meshed.

7. A billboard retreading apparatus as claimed in claim 6, wherein: the first cloth rolling mechanism (3026), the second cloth rolling mechanism (3027), the third cloth rolling mechanism (3028) and the fourth cloth rolling mechanism (3039) are formed by connecting two winders capable of automatically winding cloth strips with one long cloth strip.

8. A billboard retreading apparatus as claimed in claim 7, wherein: the upper side and the lower side of the first elastic mechanism (4013) and the second elastic mechanism (4014) are provided with an elastic telescopic block, and springs are arranged in the combination of the elastic telescopic blocks.