CN210195299U - Construction pay-off for building - Google Patents

Abstract

The utility model relates to the technical field of paying-off equipment, in particular to a construction paying-off device for buildings, which enables a box body to move more conveniently through the rotation of a right side wheel and a left side wheel, the box body moves faster, manpower and time are saved, and the speed of a wire on a wire wheel extending to the outside through a paying-off port is close to the advancing speed of the right side wheel, so that the tension of the wire body is reduced when paying-off is carried out, the risk of breaking the wire is reduced, the movement of the right side wheel is carried out synchronously with the wire winding work of the wire wheel when winding up, the work efficiency is improved, and the practicability and the reliability are improved; the wire unwinding device comprises a box body, a first rolling shaft, a first fixing block, a second fixing block and a wire wheel, wherein a cavity is arranged in the box body, the front end of the cavity is communicated with a wire unwinding port, the first rolling shaft is positioned in the cavity, and the left end of the first rolling shaft is rotatably connected with the right end of the first fixing block; the device also comprises a right side wheel, a left side wheel, a second rolling shaft, two groups of bearings, a first belt pulley, a belt, a second belt pulley and a third fixing block.

Description

Construction pay-off for building

Technical Field

The utility model relates to a technical field of unwrapping wire equipment especially relates to a construction pay-off for building.

Background

As is well known, a pay-off device is an auxiliary device for construction pay-off, which is widely used in the field of pay-off equipment; the existing pay-off device comprises a box body, a first rolling shaft, a first fixing block, a second fixing block and a wire wheel, wherein a cavity is arranged in the box body, the front end of the cavity is communicated with and provided with a wire pay-off opening, the first rolling shaft is positioned in the cavity, the left end of the first rolling shaft is rotatably connected with the right end of the first fixing block, the left end of the first fixing block is fixedly connected with the left wall of the cavity, the right end of the first rolling shaft is rotatably connected with the left end of the second fixing block, the right end of the second fixing block is fixedly connected with the right wall of the cavity, a left-right through shaft hole is formed in the middle of the wire wheel, the wire wheel is sleeved on the outer wall; when the existing pay-off device is used, firstly, a box body is manually taken up, the wire end of a wire wheel extends out of the cavity through a wire releasing port, the wire end of the wire wheel is manually fixed in position, then the box body is moved to release wires, the wire wheel end drags the wire wheel to rotate, the wire wheel drives a first rolling shaft to rotate through a first fixing block and a second fixing block, the wire end of the wire wheel does not generate pulling force any more after the box body reaches the position, the wire wheel stops rotating, the wire releasing is completed, the box body is manually moved to the position of the wire end of the wire wheel during the wire releasing, the wire wheel is manually rotated to collect wires outside the box body, and the box body; present pay-off uses the discovery, and the manual work is moved the box and is removed the unwrapping wire, leads to the consumption of physical power, and the translation rate is slower when the manual work is moved the box, and the unwrapping wire time is longer, leads to the time waste, and the line end that the line wheel was dragged to the manual work during the unwrapping wire needs carries out the unwrapping wire, and the line that leads to the box external world to have emitted has the pulling force, breaks the line easily, needs the manual work to rotate the line wheel when receiving the line and receives the line, and work efficiency is lower, leads.

SUMMERY OF THE UTILITY MODEL

For solving the technical problem, the utility model provides a rotate through right side wheel and left side wheel, it is more convenient to make the box remove, box moving speed is faster, use manpower sparingly and time, the line that takes turns to simultaneously stretches out to external speed and right side wheel forward velocity through the unwrapping wire mouth is close, make unwrapping wire during operation, line body pulling force reduces, reduce the risk of breaking the line, the removal of right side wheel is gone on with the receipts line work of line wheel in step when receiving the line, and the work efficiency is improved, improve the pay-off of practicality and reliability.

The utility model discloses a construction pay-off for building, including the box, first roller bearing, first fixed block, the second fixed block, the line wheel, be provided with the cavity in the box, the cavity front end intercommunication is provided with the unwrapping wire mouth, first roller bearing is located the cavity, the left end of first roller bearing and the right-hand member rotatable coupling of first fixed block, the left end of first fixed block and cavity left wall fixed connection, the right-hand member of first roller bearing and the left end rotatable coupling of second fixed block, the right-hand member of second fixed block and cavity right wall fixed connection, the middle part of line wheel is provided with the shaft hole that runs through about, the line wheel overlaps through the shaft hole and is adorned on first roller bearing outer wall, line wheel and first roller bearing synchronous rotation; the device also comprises a right side wheel, a left side wheel, a second rolling shaft, two groups of bearings, a first belt pulley, a belt, a second belt pulley and a third fixed block, wherein the middle part of the left end of the right side wheel is connected with the right end of the second rolling shaft, the middle part of the right end of the left side wheel is rotatably connected with the left end of the second rolling shaft, the two groups of bearings are sleeved on the outer wall of the second rolling shaft through inner holes, the outer wall of the second rolling shaft is tightly attached to the inner walls of the inner holes of the two groups of bearings, the top ends of the two groups of bearings are respectively connected with the left side and the right side of the bottom end of the box body, a first through hole which penetrates through from left to right is arranged in the first belt pulley, the first belt pulley is sleeved on the outer wall of the right side of the second rolling shaft through the first through hole, the first belt pulley is positioned outside the right ends of the two groups of, the right end of the third fixed block is connected with the upper side of the right wall of the cavity, a third roller is arranged at the left end of the second belt pulley, the left end of the third roller penetrates through the right wall of the box body and the third fixed block and extends into the cavity, a right first gear is arranged at the left end of the third roller and is connected with the middle part of the right end of the first gear, a right second gear is arranged at the right side of the first roller, the second gear is located outside the right end of the wire wheel, the first roller and the second gear rotate synchronously, and the second gear is meshed with the first gear.

The construction pay-off device for the building of the utility model also comprises a supporting block, a limiting block and a connecting rod, the spring, backup pad and third belt pulley, the left end of supporting shoe is connected with the right-hand member rear side of box, the slot that runs through around the middle part of supporting shoe is provided with, the rear end of stopper is provided with the rectangle and inserts the piece, the rectangle inserts the piece and inserts the slot through the front end of supporting shoe, the rear end of stopper and the front end of supporting shoe paste tightly, the rear end of rectangle piece is connected with the front end of connecting rod, the rear end of connecting rod is connected with the front end of backup pad, the spring suit is on the connecting rod, the front end of spring is connected with the rear end of supporting shoe, the rear end of spring is connected with the front end of backup pad, the spring is in compression state, the left end rear side rotatable coupling of third belt pulley and backup pad, first belt pulley, second belt pulley and third belt pulley pass through belt drive and are connected.

The utility model discloses a construction pay-off for building still includes catch bar and handle, and the front end of catch bar is connected with the rear end upside of box, and the top of catch bar is connected with the bottom middle part of handle.

The utility model discloses a construction pay-off for building still includes supporting leg and lower margin, and the top of supporting leg is connected with the bottom rear side of box, and the top middle part of lower margin is connected with the bottom of supporting leg.

The utility model discloses a construction pay-off for building still includes first branch, second branch and leading wheel, and the front end and the cavity front end middle part of first branch are connected, and the rear end of first branch is connected with the lower extreme of second branch, the top of second branch and the middle part rotatable coupling of leading wheel, the leading wheel is located the rear of putting the line mouth, and the middle part of leading wheel circumferencial direction is provided with the wire casing.

The utility model discloses a construction pay-off for building still includes a body and handle, and the top intercommunication of cavity is provided with the maintenance mouth, and the bottom lid dress of the door body is on the maintenance mouth, the front end of the door body and the top front side rotatable coupling of box, and the rear end of the door body passes through bolt-up with the top rear side of box to be connected, and the bottom of handle is connected with the top middle part of the door body.

The utility model discloses a construction pay-off for building still includes the hanging piece, and box outside line terminal is fastened with the top of hanging piece and is connected, runs through to the dress hole of hanging about being provided with in the hanging piece.

The utility model discloses a construction pay-off for building still includes the handle cover, and the handle cover suit is on the outer wall of handle.

Compared with the prior art, the beneficial effects of the utility model are that: the wire end of the wire wheel extends out of the cavity through the wire releasing port, the wire end of the wire wheel is fixed in position manually, the box body is pushed to move forwards by the manual operation through the forward rotation of the right side wheel and the left side wheel, the right side wheel drives the second rolling shaft to rotate in the forward direction, the second rolling shaft drives the first belt wheel to rotate in the forward direction, the first belt wheel drives the second belt wheel to rotate in the forward direction through the belt, the third rolling shaft can rotate through the third fixed block, the second belt wheel drives the first gear to rotate in the forward direction through the third rolling shaft, the first gear is meshed with the second gear, the second gear and the first rolling shaft rotate synchronously, the first gear drives the first rolling shaft to rotate in the forward direction through the second gear, the wire wheel drives the wire to rotate in the forward direction through the wire releasing port, the wire advancing speed of the right side wheel is close to the extending speed of the wire through the wire releasing port through the first belt, the second belt, the first gear and the, when the box body reaches the position, the right side wheel stops rotating the wire wheel, the wire releasing work is finished, when the wire is released, the box body is pushed to move backwards through the reverse rotation of the right side wheel and the left side wheel by manpower, the reverse rotation of the right side wheel drives the reverse rotation of a second rolling shaft, the second rolling shaft drives a first belt wheel to rotate reversely, the first belt wheel drives a second belt wheel to rotate reversely through a belt, the second belt wheel drives a first gear to rotate reversely through a third rolling shaft, the first gear is meshed with the second gear, the second gear and the first rolling shaft rotate synchronously, the first gear drives the first rolling shaft to rotate reversely through the second gear, the first rolling shaft drives the wire wheel to rotate reversely, the wire wheel recovers and winds an outer boundary line onto the wire wheel through a wire releasing port, the box body moves to the position of the wire wheel, when the wire releasing work and releasing work are finished, the box body pushes the right side wheel and the left, rotate through right side wheel and left side wheel, it is more convenient to make the box remove, and box moving speed is faster, uses manpower sparingly and time, and the line that takes turns to simultaneously stretches out to external speed and right side wheel forward velocity through the unwrapping wire mouth is close, makes unwrapping wire during operation, and line body pulling force is less, reduces the risk of breaking the line, and the removal of right side wheel and the receipts line work of taking turns to go on in step when receiving the line, has improved work efficiency, improves practicality and reliability.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a schematic diagram of the right-hand side view of FIG. 1;

FIG. 3 is an enlarged top view of the third pulley of FIG. 2;

FIG. 4 is an enlarged view of the guide wheel of FIG. 2;

in the drawings, the reference numbers: 1. a box body; 2. a first roller; 3. a first fixed block; 4. a second fixed block; 5. a wire wheel; 6. a right side wheel; 7. a left side wheel; 8. a second roller; 9. a bearing; 10. a first pulley; 11. a belt; 12. a second pulley; 13. a third fixed block; 14. a third roller; 15. a first gear; 16. a second gear; 17. a support block; 18. a limiting block; 19. a connecting rod; 20. a spring; 21. a support plate; 22. a third belt pulley; 23. a push rod; 24. a handle; 25. supporting legs; 26. ground feet; 27. a first support bar; 28. a second support bar; 29. a guide wheel; 30. a door body; 31. a handle; 32. hanging a piece; 33. a handle sleeve.

Detailed Description

The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

As shown in fig. 1 to 4, the utility model discloses a construction pay-off for building, including box 1, first roller shaft 2, first fixed block 3, second fixed block 4, line wheel 5, be provided with the cavity in the box 1, the cavity front end intercommunication is provided with the pay-off mouth, first roller shaft 2 is located the cavity, the left end of first roller shaft 2 and the right-hand member rotatable coupling of first fixed block 3, the left end of first fixed block 3 and the left wall fixed connection of cavity, the right end of first roller shaft 2 and the left end rotatable coupling of second fixed block 4, the right end of second fixed block 4 and the right wall fixed connection of cavity, the middle part of line wheel 5 is provided with the shaft hole that runs through from side to side, line wheel 5 is adorned on first roller shaft 2 outer wall through the shaft hole cover, line wheel 5 rotates with first roller shaft 2; the belt conveyor also comprises a right side wheel 6, a left side wheel 7, a second roller 8, two groups of bearings 9, a first belt pulley 10, a belt 11, a second belt pulley 12 and a third fixed block 13, the middle part of the left end of the right side wheel 6 is connected with the right end of the second roller 8, the middle part of the right end of the left side wheel 7 is rotatably connected with the left end of the second roller 8, the two groups of bearings 9 are sleeved on the outer wall of the second roller 8 through inner holes, the outer wall of the second roller 8 is tightly attached to the inner walls of the inner holes of the two groups of bearings 9, the top ends of the two groups of bearings 9 are respectively connected with the left side and the right side of the bottom end of the box body 1, a first through hole which penetrates through the left and right is arranged in the first belt pulley 10, the first belt pulley 10 is sleeved on the outer wall of the right side of the second roller 8 through the first through hole, the first belt pulley 10 is positioned outside the right ends of the two, the first belt pulley 10 is synchronously connected with the second belt pulley 12 through a belt 11, the right end of a third fixed block 13 is connected with the upper side of the right wall of the cavity, a third roller 14 is arranged at the left end of the second belt pulley 12, the left end of the third roller 14 penetrates through the right wall of the box body 1 and the third fixed block 13 and extends into the cavity, a right first gear 15 is arranged at the left end of the third roller 14 and is connected with the middle part of the right end of the first gear 15, a right second gear 16 is arranged at the right side of the first roller 2, the second gear 16 is positioned outside the right end of the reel 5, the first roller 2 and the second gear 16 synchronously rotate, and the second gear 16 is meshed with the first gear 15; the wire end of the wire wheel extends out of the cavity through the wire releasing port, the wire end of the wire wheel is fixed in position manually, the box body is pushed to move forwards by the manual operation through the forward rotation of the right side wheel and the left side wheel, the right side wheel drives the second rolling shaft to rotate in the forward direction, the second rolling shaft drives the first belt wheel to rotate in the forward direction, the first belt wheel drives the second belt wheel to rotate in the forward direction through the belt, the third rolling shaft can rotate through the third fixed block, the second belt wheel drives the first gear to rotate in the forward direction through the third rolling shaft, the first gear is meshed with the second gear, the second gear and the first rolling shaft rotate synchronously, the first gear drives the first rolling shaft to rotate in the forward direction through the second gear, the wire wheel drives the wire to rotate in the forward direction through the wire releasing port, the wire advancing speed of the right side wheel is close to the extending speed of the wire through the wire releasing port through the first belt, the second belt, the first gear and the, when the box body reaches the position, the right side wheel stops rotating the wire wheel, the wire releasing work is finished, when the wire is released, the box body is pushed to move backwards through the reverse rotation of the right side wheel and the left side wheel by manpower, the reverse rotation of the right side wheel drives the reverse rotation of a second rolling shaft, the second rolling shaft drives a first belt wheel to rotate reversely, the first belt wheel drives a second belt wheel to rotate reversely through a belt, the second belt wheel drives a first gear to rotate reversely through a third rolling shaft, the first gear is meshed with the second gear, the second gear and the first rolling shaft rotate synchronously, the first gear drives the first rolling shaft to rotate reversely through the second gear, the first rolling shaft drives the wire wheel to rotate reversely, the wire wheel recovers and winds an outer boundary line onto the wire wheel through a wire releasing port, the box body moves to the position of the wire wheel, when the wire releasing work and releasing work are finished, the box body pushes the right side wheel and the left, rotate through right side wheel and left side wheel, it is more convenient to make the box remove, and box moving speed is faster, uses manpower sparingly and time, and the line that takes turns to simultaneously stretches out to external speed and right side wheel forward velocity through the unwrapping wire mouth is close, makes unwrapping wire during operation, and line body pulling force is less, reduces the risk of breaking the line, and the removal of right side wheel and the receipts line work of taking turns to go on in step when receiving the line, has improved work efficiency, improves practicality and reliability.

The utility model discloses a construction pay-off for building, still include supporting shoe 17, stopper 18, connecting rod 19, spring 20, backup pad 21 and third belt pulley 22, the left end of supporting shoe 17 is connected with the right-hand member rear side of box 1, the middle part of supporting shoe 17 is provided with the rectangle hole that runs through from beginning to end, the rear end of stopper 18 is provided with rectangle inserted block, rectangle inserted block passes through the rectangle hole that the front end of supporting shoe 17 inserted, the rear end of stopper 18 and the front end of supporting shoe 17 are hugged closely, the rear end of rectangle block is connected with the front end of connecting rod 19, the rear end of connecting rod 19 is connected with the front end of backup pad 21, spring 20 suit is on connecting rod 19, the front end of spring 20 is connected with the rear end of supporting shoe 17, the rear end of spring 20 is connected with the front end of backup pad 21, spring 20 is in the compression state, third belt pulley 22 and the left end rear side rotatable coupling of backup, the first belt pulley 10, the second belt pulley 12 and the third belt pulley 22 are in transmission connection through a belt 11; the spring is in a compressed state, the rear end of the spring pushes the support plate and the third belt pulley to move backwards, the third belt pulley drives the belt to move backwards to enable the belt to be in a tensioned state, when the box body carries out paying-off and taking-up work, the first belt pulley and the second belt pulley transmit motion through the tensioned belt, when the box body is idle, the elongated insertion block can be pulled forwards manually through the limiting block and separated from the elongated insertion block, the elongated insertion block drives the third belt pulley to move forwards through the connecting rod and the support plate to enable the belt to be in a relaxed state, the spring is in a compressed state, the limiting block is moved to enable the elongated insertion block to deviate from the position of the rectangular hole, the rear end of the elongated insertion block is tightly attached to the front wall of the support block to enable the third belt pulley to be in a suspended state, the belt is in a relaxed state, the second belt pulley stops rotating, and, second belt pulley stop rotation, the convenience is removed the box, the box is carrying out the unwrapping wire and is receiving the during operation of line, manual movement stopper makes rectangular shape insert the piece and insert in the rectangular hole, spring promotion backup pad and third belt pulley rearward movement, the third belt pulley drives the belt rearward movement, the belt is in the tensioning state, first belt pulley passes through belt transmission motion with the second belt pulley, the back-and-forth movement through the third belt pulley makes the belt be in lax and tensioning state, the convenience is to the use of box, practicality and reliability are improved.

The construction pay-off device for the building of the utility model also comprises a push rod 23 and a handle 24, wherein the front end of the push rod 23 is connected with the upper side of the rear end of the box body 1, and the top end of the push rod 23 is connected with the middle part of the bottom end of the handle 24; through setting up catch bar and handle, make things convenient for human body to the impetus of box, improve the practicality.

The utility model discloses a construction pay-off for building still includes supporting leg 25 and lower margin 26, and the top of supporting leg 25 is connected with the bottom rear side of box 1, and the top middle part of lower margin 26 is connected with the bottom of supporting leg 25; through setting up supporting leg and lower margin, carry out the supporting role to pay-off when idle, prevent that the box from falling, improve practicality and reliability.

The utility model discloses a construction pay-off for building still includes first branch 27, second branch 28 and leading wheel 29, and the front end of first branch 27 is connected with cavity front end middle part, and the rear end of first branch 27 is connected with the lower extreme of second branch 28, and the top of second branch 28 and the middle part rotatable coupling of leading wheel 29, and leading wheel 29 is located the rear of putting the line mouth, and the middle part of leading wheel 29 circumferencial direction is provided with the wire casing; the wire on the wire wheel carries out the work of unwrapping wire and receipts line through the wire releasing groove on the leading wheel, and through the rotation of leading wheel, the receipts line that makes the wire wheel is more comfortable with put down work, improves the practicality.

The utility model discloses a construction pay-off for building still includes door body 30 and handle 31, and the top intercommunication of cavity is provided with the maintenance mouth, and the bottom lid of door body 30 is adorned on the maintenance mouth, and the front end of door body 30 and the top front side rotatable coupling of box 1, and the rear end of door body 30 passes through bolt-up with the top rear side of box 1 to be connected, and the bottom of handle 31 is connected with the top middle part of door body 30; the bolt between the door body and the box body is unscrewed, the door body is opened through the handle, and the inner member in the cavity can be checked and maintained through the maintenance port, so that the reliability is improved.

The utility model discloses a construction pay-off for building still includes hanging piece 32, and the terminal of the box 1 outside is tied tightly with the top of hanging piece 32, and hanging holes are arranged in hanging piece 32 and run through from left to right; through setting up the lacing film, can conveniently fix the line terminal of line wheel, make unwrapping wire work more convenient, improve the practicality.

The construction pay-off device for the building of the utility model also comprises a handle sleeve 33, the handle sleeve 33 is sleeved on the outer wall of the handle 24; through setting up the handle cover, can effectively protect the adversary when the manual work promotes the box motion through the handle, prevent that the hand from fraying, improve the security.

The utility model discloses a construction pay-off for building, it is at the during operation, the line end of line wheel stretches out to the cavity external through the unwrapping wire mouth, the artifical line end fixed position with the line wheel, the manual work is rotated through right side wheel and left side wheel forward and is promoted the box forward motion, right side wheel forward rotates and drives second roller bearing forward rotation, the second roller bearing drives first belt pulley forward rotation, first belt pulley drives second belt pulley forward rotation through the belt, the third roller bearing is rotatable through the third fixed block, the second belt pulley drives first gear forward rotation through the third roller bearing, first gear and second gear meshing, second gear and first roller bearing synchronous rotation, first gear drives first roller bearing forward rotation through the second gear, first roller bearing drives the line wheel forward rotation, the line wheel carries the line to the box external world through the unwrapping wire mouth, through first belt pulley, the belt, The second belt wheel, the first gear and the second gear are driven to enable the advancing speed of the right side wheel to be close to the extending speed of the wire through the wire releasing opening, when the box body reaches the position, the right side wheel stops rotating the wire wheel, the wire releasing work is finished, when the wire is taken up, the box body is pushed to move backwards through the reverse rotation of the right side wheel and the left side wheel, the reverse rotation of the right side wheel drives the reverse rotation of the second rolling shaft, the second rolling shaft drives the first belt wheel to rotate reversely through a belt, the second belt wheel drives the first gear to rotate reversely through a third rolling shaft, the first gear is meshed with the second gear, the second gear and the first rolling shaft rotate synchronously, the first gear drives the first rolling shaft to rotate reversely through the second gear, the first rolling shaft drives the wire wheel to rotate reversely, and the wire wheel recovers and winds an outer boundary line onto the wire wheel through the wire releasing opening, the box body is moved to the position of the wire wheel, the wire take-up work is finished, when the box body carries out the wire take-up and pay-off work, the spring is in a compressed state, the rear end of the spring pushes the support plate and the third belt pulley to move backwards, the third belt pulley drives the belt to move backwards, so that the belt is in a tensioned state, when the box body carries out the wire take-up and pay-off work, the first belt pulley and the second belt pulley transmit motion through the tensioned belt, when the box body is idle, the elongated insertion block can be manually pulled forwards through the limiting block to enable the elongated insertion block to be separated from the rectangular hole, the elongated insertion block drives the third belt pulley to move forwards through the connecting rod and the support plate, so that the belt is in a relaxed state, the spring is in a compressed state, the limiting block is moved to enable the elongated insertion block to deviate from the rectangular hole, the belt is in lax state, second belt pulley stall, when making the box remove through right side wheel and left side wheel, second belt pulley stall, the convenience removes the box, the box is carrying out the unwrapping wire and receives the during operation of line, the manual movement stopper makes rectangular shape insert the piece and insert in the rectangular hole, spring promotion backup pad and third belt pulley rearward movement, the third belt pulley drives the belt rearward movement, the belt is in the tensioning state, first belt pulley passes through belt transmission motion with the second belt pulley, the box is receiving line and unwrapping wire during operation, the manual work promotes the box and makes right side wheel and left side wheel remove through two sets of bearings can.

The utility model discloses a construction pay-off for building, its mounting means, connected mode or set up the mode and be common mechanical system, as long as can reach all can implement of its beneficial effect.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims (8)

1. A construction pay-off device for buildings comprises a box body (1), a first roller (2), a first fixed block (3), a second fixed block (4) and a wire wheel (5), wherein a cavity is arranged in the box body (1), the front end of the cavity is communicated with a wire releasing hole, the first roller (2) is positioned in the cavity, the left end of the first roller (2) is rotatably connected with the right end of the first fixed block (3), the left end of the first fixed block (3) is fixedly connected with the left wall of the cavity, the right end of the first roller (2) is rotatably connected with the left end of the second fixed block (4), the right end of the second fixed block (4) is fixedly connected with the right wall of the cavity, a left-right through shaft hole is formed in the middle of the wire wheel (5), the wire wheel (5) is sleeved on the outer wall of the first roller (2) through the shaft hole, and the wire wheel (5) and the first roller; it is characterized by also comprising a right side wheel (6), a left side wheel (7), a second rolling shaft (8), two groups of bearings (9), a first belt pulley (10), a belt (11), a second belt pulley (12) and a third fixed block (13), wherein the middle part of the left end of the right side wheel (6) is connected with the right end of the second rolling shaft (8), the middle part of the right end of the left side wheel (7) is rotatably connected with the left end of the second rolling shaft (8), the two groups of bearings (9) are sleeved on the outer wall of the second rolling shaft (8) through inner holes, the outer wall of the second rolling shaft (8) is tightly attached to the inner walls of the inner holes of the two groups of bearings (9), the top ends of the two groups of bearings (9) are respectively connected with the left side and the right side of the bottom end of the box body (1), a first through hole which penetrates through the left and the right sides of the first belt pulley (10) is arranged in the first belt pulley (10), the first belt pulley (10) is positioned outside the right ends of the two groups of bearings (9), the first belt pulley (10) and the second roller (8) synchronously rotate, the second belt pulley (12) is positioned outside the right ends of the box body (1), the first belt pulley (10) and the second belt pulley (12) are synchronously connected through a belt (11), the right end of a third fixed block (13) is connected with the upper side of the right wall of the cavity, the left end of the second belt pulley (12) is provided with a third roller (14), the left end of the third roller (14) penetrates through the right wall of the box body (1) and the third fixed block (13) and extends into the cavity, the left end of the third roller (14) is provided with a right first gear (15) and is connected with the middle part of the right end of the first gear (15), the right side of the first roller (2) is provided with a right second gear (16), the second roller (16) is positioned outside the right end of the wire wheel (5), the first roller (2) and the second gear (16) synchronously rotate, the second gear (16) is meshed with the first gear (15).

2. The construction pay-off device for the building as claimed in claim 1, further comprising a supporting block (17), a limiting block (18), a connecting rod (19), a spring (20), a supporting plate (21) and a third belt pulley (22), wherein the left end of the supporting block (17) is connected with the rear side of the right end of the box body (1), the middle part of the supporting block (17) is provided with a rectangular hole which penetrates through the front and the rear, the rear end of the limiting block (18) is provided with a rectangular insertion block which is inserted into the rectangular hole through the front end of the supporting block (17), the rear end of the limiting block (18) is closely attached to the front end of the supporting block (17), the rear end of the rectangular block is connected with the front end of the connecting rod (19), the rear end of the connecting rod (19) is connected with the front end of the supporting plate (21), the spring (20) is sleeved on the connecting rod (19), and the front end of the spring (20) is connected with, the rear end of the spring (20) is connected with the front end of the support plate (21), the spring (20) is in a compression state, the third belt pulley (22) is rotatably connected with the rear side of the left end of the support plate (21), and the first belt pulley (10), the second belt pulley (12) and the third belt pulley (22) are in transmission connection through a belt (11).

3. The construction paying-off device for buildings as claimed in claim 2, further comprising a push rod (23) and a handle (24), wherein the front end of the push rod (23) is connected with the upper side of the rear end of the box body (1), and the top end of the push rod (23) is connected with the middle part of the bottom end of the handle (24).

4. A construction pay-off device for buildings according to claim 3, further comprising support legs (25) and feet (26), wherein the top ends of the support legs (25) are connected to the rear side of the bottom end of the case (1), and the middle portions of the top ends of the feet (26) are connected to the bottom ends of the support legs (25).

5. The construction pay-off device for the building as claimed in claim 4, further comprising a first support rod (27), a second support rod (28) and a guide wheel (29), wherein the front end of the first support rod (27) is connected with the middle of the front end of the cavity, the rear end of the first support rod (27) is connected with the lower end of the second support rod (28), the top end of the second support rod (28) is rotatably connected with the middle of the guide wheel (29), the guide wheel (29) is located behind the pay-off port, and the middle of the guide wheel (29) in the circumferential direction is provided with a pay-off groove.

6. The construction pay-off device for the building as claimed in claim 5, further comprising a door body (30) and a handle (31), wherein the top end of the cavity is communicated with and provided with a maintenance opening, the bottom end of the door body (30) is covered on the maintenance opening, the front end of the door body (30) is rotatably connected with the front side of the top end of the box body (1), the rear end of the door body (30) is fixedly connected with the rear side of the top end of the box body (1) through a bolt, and the bottom end of the handle (31) is connected with the middle part of the top end of the door body (30).

7. The construction pay-off device for the building as claimed in claim 6, further comprising a hanging piece (32), wherein the outer side line end of the box body (1) is fastened and connected with the top end of the hanging piece (32), and the hanging piece (32) is internally provided with a hanging hole which penetrates through the left side and the right side.

8. The construction paying-off device for buildings according to claim 7, further comprising a handle sleeve (33), wherein the handle sleeve (33) is sleeved on the outer wall of the handle (24).

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