Construction joint post-pouring strip leaving construction device

Abstract

The application relates to the technical field of building construction equipment, in particular to a construction joint post-pouring strip setting construction device, which comprises a supporting base, supports are symmetrically arranged on the outer side of the supporting base, a driving motor is arranged on the supports through a motor fixing frame, a gear shaft is coaxially connected to the output end of the driving motor, a C-shaped positioning plate is fixedly arranged near the top of the supporting base, edge blocking rollers are symmetrically arranged on the outer side wall of the C-shaped positioning plate at equal angles along the path, the edge blocking rollers on the same side are combined into movable mounting positions, a C-shaped driving plate and a C-shaped synchronous plate are arranged in the two symmetric movable mounting position areas, the opposite surfaces of the C-shaped driving plate and the C-shaped synchronous plate are locked and positioned through opposite pull bolts, a gear block meshed with the gear shaft is arranged in the inner arc surface area of the C-shaped driving plate, and a fixing plate is welded to the outer side of the C-shaped synchronous plate; the construction quality and efficiency of the closing net blocking surface unit are effectively improved, and the adaptability is high.

Description

Technical Field

[0001] This invention relates to the field of building construction equipment technology, and in particular to a construction device for leaving a post-pouring strip at a construction joint. Background Technology

[0002] In the field of building construction, the construction joint / post-cast strip installation device refers to a specialized tool or equipment used to pre-form and support the temporary structural section of the construction joint or post-cast strip during the concrete pouring process. Its core function is to ensure the precise location, regular shape, and reliable support of this temporary section, laying the foundation for the smooth pouring of subsequent concrete and the final overall connection of the structure. Among these steps, using a steel reinforcement cage as a support and wrapping it with a special sealing mesh to form an intercepting surface unit with sufficient rigidity and a rough surface is a key technical step in constructing the interface on both sides of the post-cast strip. The quality of this step directly determines the cross-sectional quality of the construction joint, its waterproof performance, and the bonding strength between the old and new concrete; therefore, it is a crucial link in the entire installation process.

[0003] Currently, existing construction methods involving this type of rebar cage and mesh reinforcement combination mostly rely on manual labor or simple fixed auxiliary tools. A common practice is for workers to weld two main reinforcing bars and several transverse short bars into a simple cage on-site, and then manually wrap and tie the mesh reinforcement to the cage. This method depends entirely on the experience and skill of the operators, resulting in inconsistent quality of the formed units. The tightness of the wrapping, the flatness of the mesh, and the tightness of the connection between the cage and the mesh cannot be guaranteed to be consistent, making it difficult to form an ideal uniform rough cross-section. Furthermore, manual wrapping is inefficient and labor-intensive, and it is difficult to achieve precise synchronization between the wrapping of the mesh reinforcement and the feeding of the cage, easily leading to uneven wrapping and cage deformation.

[0004] Therefore, it is necessary to provide a construction device for leaving a post-pouring strip at the construction joint to solve the above-mentioned technical problems. Summary of the Invention

[0005] To address the problems existing in the prior art, the present invention provides a construction device for leaving a post-pouring strip at a construction joint.

[0006] The technical solution adopted by the present invention to solve its technical problem is: a construction device for leaving a post-pouring strip at a construction joint, including a support base, brackets symmetrically installed on the outer side of the support base, a drive motor installed on the brackets via a motor fixing bracket, and a gear shaft coaxially connected to the output end of the drive motor;

[0007] A C-shaped positioning plate is fixedly installed near the top of the support base. Side guard rollers are symmetrically installed at equal angles along the outer side wall of the C-shaped positioning plate. The side guard rollers at the same position on the same side are combined to form a movable mounting position. A C-shaped drive plate and a C-shaped synchronization plate are respectively provided in the two symmetrical movable mounting position areas. The opposite surfaces of the C-shaped drive plate and the C-shaped synchronization plate are locked and positioned by tie bolts.

[0008] A toothed block that meshes with the gear shaft is provided on the inner arc surface area of ​​the C-type drive plate. A fixing plate is welded on the outer side of the C-type synchronous plate. An unwinding roller for placing the closing wire mesh roll is provided on the fixing plate, and a sealing sleeve with an opening is provided on the outside of the unwinding roller.

[0009] An extension frame is fixedly installed at the top of the bracket. Mounting holes are symmetrically opened on both sides of the extension frame. Two sets of sliders are symmetrically installed in the mounting holes at different horizontal heights. A conveyor wheel is installed between the two sliders via a rotating shaft. A drive unit is concentrically installed on one side of the lower conveyor wheel.

[0010] A timing pulley is mounted on the outer wall of the bracket via a support arm. The timing pulley is connected to the drive unit via a timing belt. A first bevel gear is connected to the center of one side of the timing pulley via a timing rod. A second bevel gear is meshed with one side of the first bevel gear. The second bevel gear is concentrically fixed in the shaft area of ​​the gear shaft.

[0011] Preferably, a horizontal frame is fixedly installed at the center of the outer side wall of the extension frame, and an internally threaded sleeve is provided at the center of the top of the horizontal frame. A threaded rod is fitted inside the internally threaded sleeve, and a retaining ring is sleeved near the end of the threaded rod. The two sides of the retaining ring are limited by baffles fixed to the outer wall of the threaded rod. A through hole is opened inside the retaining ring, and a limiting rod is inserted into the through hole. One end of the limiting rod is fixedly connected to the horizontal frame. Drive arms are symmetrically hinged to the outer side of the retaining ring, and the ends of the drive arms are all hinged to the slider.

[0012] Preferably, the drive unit includes a rotating disk concentrically connected to one side of the conveyor wheel via a synchronous shaft. A circular groove is provided at the center of the outer side of the rotating disk. Wedge-shaped holes are provided at equal angles along the circumference of the outer side of the circular groove. Wedge-shaped sliders are inserted into the wedge-shaped holes. An arc-shaped block is fixedly installed at the end of each wedge-shaped slider. The grooves on the outer surfaces of multiple arc-shaped blocks together form an annular mating surface adapted to the synchronous belt. A positioning post is welded to the outer surface of the wedge-shaped slider. A positioning disk is rotatably installed at the center of the circular groove. Arc-shaped sleeves are installed at equal angles on the outer ring of the positioning disk, and the arc-shaped sleeves are fitted onto the outer wall of the positioning post. A locking bolt is installed inside the positioning disk by threaded engagement.

[0013] Preferably, a ball head is fixedly installed at the end of the locking bolt, and a rubber pad is embedded inside the circular groove and directly opposite the ball head.

[0014] Preferably, a silicone sleeve is embedded in the outer ring of the conveyor wheel, and the outer ring surface of the silicone sleeve is provided with anti-slip texture.

[0015] Preferably, a ball bearing is provided at the connection between the retaining ring and the threaded rod, and the ball bearing is coated with lubricating grease. A rotating handle is fixedly installed at the end face of the outer position baffle.

[0016] Preferably, the intersection of the center line of the threaded rod and the center line of the extension frame is located on the horizontal extension line passing through the center of the C-shaped positioning plate.

[0017] Preferably, inner lining blocks are symmetrically installed on the outer wall of the C-shaped positioning plate and between the two adjacent side rollers, and the inner lining blocks provide lateral support for the inner sides of the C-shaped drive plate and the C-shaped synchronization plate.

[0018] Compared with related technologies, the construction joint post-pouring strip retention device provided by the present invention has the following beneficial effects:

[0019] (1) This invention provides a construction device for leaving a construction joint post-pouring strip. The winding rate of the closing mesh and the feeding rate of the reinforcing steel skeleton are derived from the same power source, and the transmission ratio meets the feeding requirements. A constant speed matching relationship is formed between the two, which effectively eliminates the quality defects caused by uneven winding pitch and uneven tightness between mesh layers due to manual operation or asynchronous dual power sources. It ensures that the geometric dimensions and performance of each closing mesh interception surface unit composed of reinforcing steel skeleton and closing mesh meet the preset standards, providing regular and reliable cross-sectional forming quality for the construction joint of the post-pouring strip. Moreover, the construction personnel only need to hold the equipment and control the start and stop to automatically complete the entire process from feeding the reinforcing steel skeleton and winding the closing mesh to a fixed length, thereby improving the construction efficiency of the closing mesh interception surface unit.

[0020] (2) This invention provides a construction device for leaving a construction joint post-pouring strip. When the clasp moves, it simultaneously applies a thrust to the drive arm. This thrust drives the slider to slide in the mounting hole, completing the adjustment of the distance between the two conveying wheels. This achieves stable clamping and reliable driving of steel reinforcement skeletons of different specifications. It ensures that, under the premise of sufficient clamping force, steel reinforcement skeletons of different sizes can obtain uniform and reliable friction force, effectively avoiding the phenomenon of slippage, movement or displacement of steel reinforcement skeletons caused by uneven clamping. No matter how the rotating handle is rotated to change the distance between the two conveying wheels, the position of the central axis of the clamped steel reinforcement skeleton remains constant and automatically coincides with the rotation central axis of the C-shaped positioning plate. This eliminates the tedious process of re-aligning after changing steel reinforcement skeletons of different specifications, thus achieving the effect of clamping and alignment at the same time. This effectively improves the preparation efficiency before construction and fundamentally ensures the geometric accuracy and quality consistency of the winding and forming closing mesh interception surface unit, improving the adaptability to different working conditions.

[0021] (3) This invention provides a construction device for leaving a construction joint post-pouring strip. This invention uses a variable-diameter annular mating surface to set up a transmission ratio between the conveying wheel and the winding operation that can be changed steplessly or in stages. This allows the same device to flexibly adapt to generate different pitch and diameter closing net interception surface units without replacing the complex gearbox. The overall versatility and adaptability to working conditions are expanded. It also allows construction personnel to make fine adjustments according to the actual material characteristics and accurately match the winding tension and feed thrust. This ensures that under any material combination, the closing net interception surface unit can achieve a state where the closing net is tightly attached to the steel frame and the closing net layers are tightly interlocked, avoiding the problem of loosening or deformation of the closing net due to parameter mismatch. Attached Figure Description

[0022] Figure 1 This is a construction state diagram of the overall structure of the present invention;

[0023] Figure 2 This is a partial three-dimensional structure of the present invention. Figure 1 ;

[0024] Figure 3 This is a partial three-dimensional structure of the present invention. Figure 2 ;

[0025] Figure 4 This is a partial front view of the structure of the present invention;

[0026] Figure 5 For the present invention Figure 3 A magnified view of a portion of region A in the middle;

[0027] Figure 6 For the present invention Figure 3 A magnified view of a portion of region B in the middle;

[0028] Figure 7 For the present invention Figure 3 A magnified view of a portion of region C in the middle;

[0029] Numbered in the diagram: 1. Support base; 2. Bracket; 3. C-shaped positioning plate; 4. Extension frame; 5. Drive unit; 21. Drive motor; 22. Gear shaft; 23. Synchronous pulley; 24. Synchronous belt; 25. First bevel gear; 26. Second bevel gear; 31. Sidewall roller; 32. C-shaped drive plate; 33. C-shaped synchronous plate; 34. Tie bolt; 35. Tooth block; 36. Fixing plate; 37. Unwinding roller; 38. Sealing sleeve; 39. Inner liner block; 41. Mounting hole. 42. Slider, 43. Conveyor wheel, 44. Horizontal frame, 45. Internal threaded sleeve, 46. Threaded rod, 461. Baffle, 47. Snap ring, 471. Through hole, 472. Limiting rod, 473. Drive arm, 51. Rotary disk, 52. Circular groove, 53. Wedge hole, 54. Wedge slider, 55. Arc block, 56. Positioning pin, 57. Positioning disc, 58. Arc sleeve block, 59. Locking bolt, 551. Groove, 511. Ball head, 512. Rubber pad. Detailed Implementation

[0030] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0031] Furthermore, the terms used below are defined based on the functionality of this invention and may vary depending on the user's, operator's, or conventions. Therefore, these terms are defined based on the entire contents of this specification.

[0032] Please see Figures 1-7 The construction device for leaving a post-pouring strip at a construction joint according to the present invention includes a support base 1. A bracket 2 is symmetrically installed on the outer side of the support base 1. A drive motor 21 is installed on the bracket 2 via a motor fixing bracket. The output end of the drive motor 21 is coaxially connected to a gear shaft 22. Generally, the drive motor 21 can be a motor with a reduction mechanism to prevent the output end speed from being too fast.

[0033] A C-shaped positioning plate 3 is fixedly installed near the top of the support base 1. Side guard rollers 31 are symmetrically installed at equal angles along the outer side wall of the C-shaped positioning plate 3. The side guard rollers 31 at the same position on the same side are combined to form a movable mounting position. A C-shaped drive plate 32 and a C-shaped synchronization plate 33 are respectively provided in the two symmetrical movable mounting position areas. The C-shaped drive plate 32 and the C-shaped synchronization plate 33 can rotate within the movable mounting position, and their rotation centers are the same.

[0034] Meanwhile, the opposing surfaces of the C-type drive plate 32 and the C-type synchronization plate 33 are locked and positioned by tie bolts 34, so that the movement trajectories of the C-type drive plate 32 and the C-type synchronization plate 33 are consistent.

[0035] The outer wall of the C-shaped positioning plate 3 is symmetrically equipped with inner lining blocks 39 between the two adjacent side rollers 31. The end face of the inner lining block 39 is a smooth surface. The inner lining block 39 provides lateral support to the inner side of the C-shaped drive plate 32 and the C-shaped synchronous plate 33, thereby reducing the squeezing force on the inner side of the side roller 31 when the C-shaped drive plate 32 and the C-shaped synchronous plate 33 move.

[0036] A toothed block 35 that meshes with the gear shaft 22 is provided on the inner arc surface area of ​​the C-type drive plate 32, and a fixing plate 36 is welded to the outer side of the C-type synchronization plate 33.

[0037] An unwinding roller 37 for placing the closing wire mesh roll is provided on the fixed plate 36, and a sealing sleeve 38 with an opening is provided on the outside of the unwinding roller 37. The sealing sleeve 38 is detachable from the unwinding roller 37.

[0038] An extension frame 4 is fixedly installed at the top of the bracket 2. Mounting holes 41 are symmetrically opened on both sides of the extension frame 4. Two sets of sliders 42 are symmetrically installed in the mounting holes 41 at different horizontal heights. A conveyor wheel 43 is installed between the two sliders 42 via a rotating shaft. The steel reinforcement skeleton is placed between the two conveyor wheels 43 at different horizontal heights.

[0039] A drive unit 5 is concentrically mounted on one side of the lower conveyor wheel 43. A synchronous wheel 23 is mounted on the outer side wall of the bracket 2 via a support arm. The synchronous wheel 23 is connected to the drive unit 5 via a synchronous belt 24. A first bevel gear 25 is connected to one side of the synchronous wheel 23 via a synchronous rod at the center position. A second bevel gear 26 is meshed with one side of the first bevel gear 25. The second bevel gear 26 is concentrically fixed in the shaft area of ​​the gear shaft 22.

[0040] In the initial state, the reinforcing steel frame is inserted between the two conveyor wheels 43. The construction worker manually pulls the free end of the closing mesh roll out from the opening of the sealing sleeve 38, and follows the steps as follows: Figure 1 The initial section of the closing mesh is wrapped around the steel frame as shown in the diagram.

[0041] Based on the above, when the drive motor 21 is started, the rotating gear shaft 22 first engages with the gear block 35 to drive the C-shaped drive plate 32 and the C-shaped synchronous plate 33 to rotate on the side roller 31. The rotating C-shaped synchronous plate 33 synchronously drives the coiling wire mesh on the unwinding roller 37 to wind onto the steel reinforcement skeleton. At the same time, the gear shaft 22 synchronously drives the second bevel gear 26 to rotate. The rotating second bevel gear 26 meshes with the first bevel gear 25 to drive the synchronous wheel 23 to run on the support arm. It also drives the drive unit 5 to rotate through the synchronous belt 24. Finally, the drive unit 5 drives the horizontally lowered conveyor wheel 43 to rotate. Under the action of friction, the steel reinforcement skeleton is automatically fed to complete the coiling wire mesh winding operation of the steel reinforcement skeleton.

[0042] In this embodiment, since the winding rate of the closing mesh and the feeding rate of the reinforcing steel cage originate from the same power source (i.e., drive motor 21) and the transmission ratio meets the feeding requirements, a constant speed matching relationship is formed between the two. This effectively eliminates the quality defects caused by uneven winding pitch and inconsistent mesh tightness due to manual operation or asynchronous dual power sources. It ensures that the geometric dimensions and performance of each closing mesh interception surface unit composed of reinforcing steel cage and closing mesh meet the preset standards, providing regular and reliable cross-sectional forming quality for the post-pouring strip construction joint. Moreover, construction personnel only need to hold the equipment and control the start and stop to automatically complete the entire process from feeding the reinforcing steel cage, winding the closing mesh to a fixed length, thereby improving the construction efficiency of the closing mesh interception surface unit.

[0043] Generally, a silicone sleeve is embedded in the outer ring of the conveying wheel 43, and the outer ring surface of the silicone sleeve is provided with anti-slip texture. The silicone sleeve increases its surface coefficient and increases the friction in the contact area with the steel reinforcement skeleton. The outer ring of the conveying wheel 43 has a V-shaped groove or a semi-circular groove, which can limit the feed steel reinforcement skeleton laterally and is suitable for steel reinforcement skeletons of different sizes.

[0044] In another embodiment, reference Figures 3-6 A horizontal frame 44 is fixedly installed at the center of the outer side wall of the extension frame 4. An internal threaded sleeve 45 is provided at the center of the top of the horizontal frame 44. A threaded rod 46 is installed inside the internal threaded sleeve 45. The feed depth between the threaded rod 46 and the internal threaded sleeve 45 can be adjusted by rotating the threaded rod 46.

[0045] A retaining ring 47 is fitted near the end of the threaded rod 46, and the two side walls of the retaining ring 47 are limited by a baffle 461 fixed to the outer wall of the threaded rod 46. The baffle 461 and the threaded rod 46 can be regarded as a single piece, and their movement is consistent. A ball is provided at the connection between the retaining ring 47 and the threaded rod 46, and the ball is coated with lubricating grease. A rotating handle is fixedly installed on the end face of the baffle 461 on the outer side. Rotating the rotating handle can drive the threaded rod 46 to rotate.

[0046] Since the retaining ring 47 has a through hole 471 inside, a limiting rod 472 is inserted into the through hole 471, and one end of the limiting rod 472 is fixedly connected to the horizontal frame 44, the circumferential rotation of the retaining ring 47 is locked by the limiting rod 472. When the threaded rod 46 rotates, it will push the retaining ring 47 to move along its axial direction.

[0047] Meanwhile, the outer side of the retaining ring 47 is symmetrically hinged to the drive arm 473, and the ends of the drive arm 473 are all hinged to the slider 42. That is, while the retaining ring 47 moves, a thrust is simultaneously applied to the drive arm 473. This thrust drives the slider 42 to slide in the mounting hole 41, completing the adjustment of the distance between the two conveying wheels 43. This achieves stable clamping and reliable driving of steel reinforcement cages of different specifications, ensuring that steel reinforcement cages of different sizes can obtain uniform and reliable friction under the premise of sufficient clamping force, effectively avoiding the phenomenon of slippage, movement or displacement of steel reinforcement cages caused by uneven clamping.

[0048] Furthermore, the intersection of the center line of the threaded rod 46 and the center line of the extension frame 4 is located on the horizontal extension line passing through the center of the C-shaped positioning plate 3. At this time, no matter how the rotating handle is rotated to change the distance between the two conveying wheels 43, the position of the central axis of the clamped steel reinforcement skeleton remains constant and automatically coincides with the rotation center axis of the C-shaped positioning plate 3. This eliminates the tedious process of re-aligning after changing steel reinforcement skeletons of different specifications, thus achieving the effect of clamping and centering at the same time. This effectively improves the preparation efficiency before construction and fundamentally ensures the geometric accuracy and quality consistency of the winding and forming closing mesh interception surface unit, thereby improving its adaptability to different working conditions.

[0049] In another embodiment, reference Figures 2-7 The drive unit 5 includes a rotating disk 51 that is concentrically connected to one side of the conveyor wheel 43 via a synchronous shaft. A circular groove 52 is provided at the center of the outer side of the rotating disk 51. Wedge-shaped holes 53 are provided at equal angles along the circumference of the outer side of the circular groove 52. A wedge-shaped slider 54 is inserted into the wedge-shaped hole 53. An arc-shaped block 55 is fixedly installed at the end of each wedge-shaped slider 54. The arc-shaped block 55 and the wedge-shaped slider 54 can be regarded as an integral part. When the wedge-shaped slider 54 slides in the wedge-shaped hole 53, it synchronously drives the arc-shaped block 55 to move.

[0050] Multiple arc-shaped blocks 55 have grooves 551 on their outer surfaces to form an annular mating surface that is adapted to be installed with the synchronous belt 24. A positioning post 56 is welded to the outer surface of the wedge-shaped slider 54. A positioning disc 57 is rotatably mounted in the center of the circular groove 52. Arc-shaped sleeves 58 are installed at equal angles on the outer ring of the positioning disc 57, and the arc-shaped sleeves 58 fit onto the outer wall of the positioning post 56. Figure 7 As shown, when the positioning disk 57 is rotated, the arc-shaped sleeves 58 at each position can be moved. The arc-shaped sleeves 58 apply a pressing force to the positioning pins 56 at each position. This pressing force is directly transmitted to the wedge-shaped sliders 54 through the positioning pins 56, causing the wedge-shaped sliders 54 at each position to slide synchronously in the wedge-shaped holes 53. The diameter of the annular mating surface formed by the combination of the arc-shaped blocks 55 at each position is changed.

[0051] The positioning disc 57 is fitted with a locking bolt 59 through a threaded connection. After the annular mating surface is adjusted, the locking bolt 59 can be rotated to lock the position of the positioning disc 57 against the inner wall of the circular groove 52. This variable diameter annular mating surface can be directly used to adjust the spacing value of the conveyor wheel 43, so that the synchronous belt 24 is always in a taut state.

[0052] The design parameters (width, depth) of the post-pouring strip at the construction site and the diameter and strength of the steel reinforcement skeleton vary, requiring the winding pitch (i.e. the tightness of the winding) of the closing mesh to be adjusted accordingly. By setting the variable diameter annular mating surface, the transmission ratio between the conveying wheel 43 and the winding operation can be changed steplessly or in stages, so that the same device can flexibly adapt to generate closing mesh interception surface units with different pitches and diameters without replacing the complex gearbox, thus expanding the overall versatility and adaptability to working conditions.

[0053] Meanwhile, when the thickness, hardness, or specifications of the reinforcing steel frame change, the required feeding and winding force matching relationship will also be different. The variable diameter annular mating surface setting allows construction personnel to make fine adjustments according to the actual material characteristics, accurately matching the winding tension and feeding thrust, thereby ensuring that under any material combination, the sealing mesh interception surface unit can achieve a state where the sealing mesh is tightly attached to the steel frame and the sealing mesh layers are tightly interlocked, avoiding the problem of loosening or deformation of the sealing mesh due to parameter mismatch;

[0054] Furthermore, such as Figure 7 As shown, a ball head 511 is fixedly installed at the end of the locking bolt 59. A rubber pad 512 is embedded in the inner side of the circular groove 52 and directly opposite the ball head 511. When the locking bolt 59 is rotated, the ball head 511 can be driven to fit tightly against the rubber pad 512, and the contact area of ​​the rubber pad 512 is squeezed concave, further increasing the positioning strength of the positioning plate 57.

[0055] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A construction device for leaving a post-pouring strip at a construction joint, comprising a support base (1), characterized in that, The support base (1) is symmetrically equipped with brackets (2), and a drive motor (21) is mounted on the bracket (2) via a motor fixing bracket. The output end of the drive motor (21) is coaxially connected to a gear shaft (22). A C-shaped positioning plate (3) is fixedly installed near the top of the support base (1). Side rollers (31) are symmetrically installed on the outer side wall of the C-shaped positioning plate (3) at equal angles along its path. The side rollers (31) at each position on the same side are combined to form a movable mounting position. A C-shaped drive plate (32) and a C-shaped synchronization plate (33) are respectively provided in the two symmetrical movable mounting positions. The opposite surfaces of the C-shaped drive plate (32) and the C-shaped synchronization plate (33) are locked and positioned by tie bolts (34). A toothed block (35) that meshes with the gear shaft (22) is provided on the inner arc surface area of ​​the C-type drive plate (32). A fixing plate (36) is welded to the outer side of the C-type synchronization plate (33). An unwinding roller (37) for placing the closing wire mesh roll is provided on the fixing plate (36), and a sealing sleeve (38) with an opening is provided on the outer side of the unwinding roller (37). An extension frame (4) is fixedly installed at the top of the bracket (2). Mounting holes (41) are symmetrically opened on both sides of the extension frame (4). Two sets of sliders (42) are symmetrically installed in the mounting holes (41) at different horizontal heights. A conveyor wheel (43) is installed between the two sliders (42) through a rotating shaft. A drive unit (5) is concentrically installed on one side of the lower conveyor wheel (43). A timing wheel (23) is installed on the outer wall of the bracket (2) via a support arm. The timing wheel (23) is connected to the drive unit (5) via a timing belt (24). A first bevel gear (25) is connected to the center of one side of the timing wheel (23) via a timing rod. A second bevel gear (26) is meshed with one side of the first bevel gear (25). The second bevel gear (26) is concentrically fixed in the shaft area of ​​the gear shaft (22).

2. The construction device for leaving a post-pouring strip at a construction joint according to claim 1, characterized in that, A horizontal frame (44) is fixedly installed at the center of the outer side wall of the extension frame (4). An internal threaded sleeve (45) is provided at the center of the top of the horizontal frame (44). A threaded rod (46) is installed in the internal threaded sleeve (45). A retaining ring (47) is sleeved near the end of the threaded rod (46). The two side walls of the retaining ring (47) are limited by baffles (461) fixed to the outer wall of the threaded rod (46). A through hole (471) is opened inside the retaining ring (47). A limiting rod (472) is inserted into the through hole (471). One end of the limiting rod (472) is fixedly connected to the horizontal frame (44). A drive arm (473) is symmetrically hinged to the outer side of the retaining ring (47). The ends of the drive arms (473) are all hinged to the slider (42).

3. The construction device for leaving a post-pouring strip at a construction joint according to claim 1, characterized in that, The drive unit (5) includes a rotating disk (51) that is concentrically connected to one side of the conveyor wheel (43) via a synchronous shaft. A circular groove (52) is provided at the center of the outer side of the rotating disk (51). A wedge-shaped hole (53) is provided at equal angles along the circumference of the outer side of the circular groove (52). A wedge-shaped slider (54) is inserted into the wedge-shaped hole (53). An arc-shaped block (55) is fixedly installed at the end of each wedge-shaped slider (54). The grooves (551) on the outer side of the multiple arc-shaped blocks (55) together form an annular mating surface that is adapted to be installed with the synchronous belt (24). A positioning post (56) is welded to the outer side of the wedge-shaped slider (54). A positioning disk (57) is rotatably installed at the center of the circular groove (52). An arc-shaped sleeve (58) is installed at equal angles on the outer ring of the positioning disk (57). The arc-shaped sleeve (58) is sleeved on the outer side wall of the positioning post (56). A locking bolt (59) is installed in the positioning disk (57) by threaded engagement.

4. The construction device for leaving a post-pouring strip at a construction joint according to claim 3, characterized in that, A ball head (511) is fixedly installed at the end of the locking bolt (59), and a rubber pad (512) is embedded in the inner side of the circular groove (52) and directly opposite the ball head (511).

5. A construction device for leaving a post-pouring strip at a construction joint according to claim 1, characterized in that, A silicone sleeve is embedded in the outer ring of the conveyor wheel (43), and the outer ring surface of the silicone sleeve is provided with anti-slip texture.

6. A construction device for leaving a post-pouring strip at a construction joint according to claim 2, characterized in that, A ball bearing is provided at the connection between the retaining ring (47) and the threaded rod (46), and the ball bearing is coated with lubricating grease. A rotating handle is fixedly installed at the end face of the outer position baffle (461).

7. A construction device for leaving a post-pouring strip at a construction joint according to claim 2, characterized in that, The intersection of the center line of the threaded rod (46) and the center line of the extension frame (4) is located on the horizontal extension line passing through the center of the C-shaped positioning plate (3).

8. The construction device for leaving a post-pouring strip at a construction joint according to claim 1, characterized in that, The outer wall of the C-type positioning plate (3) and between the two adjacent side rollers (31) are symmetrically equipped with inner lining blocks (39), which provide lateral support to the inner sides of the C-type drive plate (32) and the C-type synchronization plate (33).

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