A wall corner plastering backing device

Abstract

This invention discloses a wall corner plastering support device, comprising: double-corner supports symmetrically arranged on both sides of a wall for simultaneous plastering of two external corners; a single-corner support arranged at right angles on both sides of a right angle on the wall for plastering a single external corner; two sets of spirit levels respectively arranged on the outer surfaces of the double-corner and single-corner supports for leveling during construction; at least two sets of leveling pins respectively inserted through the double-corner and single-corner supports for horizontal clamping on uneven walls; at least two sets of diagonal braces symmetrically arranged on the outer walls of the double-corner and single-corner supports for clamping the walls; clamping components arranged on the double-corner supports; and sliding rails respectively arranged on the sides of the double-corner and single-corner supports. This invention enables the support to be installed on uneven wall surfaces, improving the squareness of external corners and construction efficiency.

Description

Technical Field

[0001] This invention relates to the field of corner plastering backing boards, and more particularly to a wall corner plastering backing board device. Background Technology

[0002] With the rapid development of the civil construction industry, quality requirements are becoming increasingly stringent. Most houses are handed over as bare shells, and the plastering work, as the final process in the bare shell handover, directly determines whether the handover can proceed smoothly. According to the "Technical Specification for Plastering Mortar" JGJT220-2010, when the plastering thickness exceeds 35mm, reinforcement measures must be taken. This reinforcement measure generally involves laying a layer of mesh fabric on the surface.

[0003] Currently, the industry generally uses traditional manual methods for plastering external wall corners. This involves marking control lines parallel to the corner on both sides of the wall to determine the plaster thickness. Then, using a 2m straightedge, the plaster layer is repeatedly adjusted to ensure the verticality and squareness of the corner. Finally, a trowel is used to smooth and compact the edges of the corner. Although this method is simple to operate and does not require special equipment, it has many difficult-to-solve technical defects in actual construction, which seriously affect the construction quality, efficiency, and durability of external wall corner plastering. It is also unsuitable for installing backing boards on uneven wall surfaces. Summary of the Invention

[0004] The purpose of this invention is to address the aforementioned shortcomings by providing a wall corner plastering backing device that enables the backing to be installed on uneven wall surfaces, thereby improving the squareness of the corner and construction efficiency.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a wall corner plastering backing device, comprising: Double corner plasterers are symmetrically placed on both sides of the wall and are used for plastering the two external corners of the wall at the same time. A single-corner backing board is set at a right angle on both sides of a right angle on a wall and is used for plastering a single external corner of a wall. Two sets of spirit levels are installed on the outer surfaces of the double-corner and single-corner support plates, respectively, for leveling calibration during construction. Leveling pins, in at least two sets, are installed through the double-corner backing plates and the single-corner backing plates respectively, to accommodate horizontal clamping of uneven walls; The diagonal bracing components, in at least two sets, are symmetrically arranged on the outer walls of the double-corner backrests and the single-corner backrests, and are used to clamp the double-corner backrests and the single-corner backrests to the wall. Clamping components are installed on the double-corner backing plates to clamp the double-corner backing plates at the two external corners of the wall; Slide rails are respectively installed on the sides of the double-corner backrest and the single-corner backrest; Plastering components are slidably installed within a guide rail and are used for plastering at the external corners of walls.

[0006] Furthermore, the diagonal brace includes a fixed column disposed on the outer wall of the double-corner back plate and the single-corner back plate, and a telescopic rod rotatably disposed on the fixed column.

[0007] Furthermore, the telescopic rod includes an outer cylinder rotatably mounted on a fixed column, an inner cylinder disposed within the outer cylinder, and bolts disposed on the outer cylinder for clamping the inner cylinder.

[0008] Furthermore, the clamping component includes a rotating threaded cylinder and a rotating connecting component respectively disposed on the outer wall of the two double-corner abutment plates; It also includes a locking stud rotatably disposed within the rotating connector for threaded connection with the rotating threaded cylinder, which is used to clamp the two double-angled plates.

[0009] Furthermore, the end of the rotating threaded cylinder is provided with an L-shaped rod that is rotatably connected to the double-angle abutment plate, and the double-angle abutment plate is provided with an mounting cylinder for mounting the L-shaped rod, and a limiting screw is provided between the L-shaped rod and the mounting cylinder.

[0010] Furthermore, the rotating connector is L-shaped, and the end of the rotating connector is provided with a mounting cylinder for mounting with the double-corner back plate. A limiting screw is provided between the rotating connector and the mounting cylinder. The rotating connector and the locking stud are mounted by a rolling bearing.

[0011] Furthermore, the slide rail is C-shaped, and limiting plates are provided at both ends of the slide rail.

[0012] Furthermore, the plastering component includes sliders respectively disposed in the slide rail, and a rotating rod rotatably disposed in the slider; It also includes a plasterboard that is movable on the rotating rod.

[0013] Furthermore, the slider is adapted to the slide rail, and the slider is T-shaped.

[0014] Furthermore, the leveling pin includes a threaded post that passes through the double-corner back plate and the single-corner back plate, and the end of the threaded post is provided with a handle, and the other end of the threaded post is provided with a turntable. The double-corner back plate and the single-corner back plate are provided with a groove adapted to the turntable on the side near the wall.

[0015] The beneficial effects of this invention are reflected in: 1. This invention addresses the limitations of traditional plastering backing boards, which are fixed structures that can only fit standard walls with adequate flatness. They are unsuitable for uneven walls and base layers commonly found on construction sites, resulting in poor board fit, uneven plaster thickness, and crooked corners. By setting multiple sets of independently adjustable leveling pins, the fitting distance can be precisely adjusted according to local deviations in the wall surface, achieving precise clamping and positioning on uneven walls. This completely solves the technical pain point of traditional equipment being unable to adapt to non-standard walls, significantly expanding the applicable scenarios of the equipment.

[0016] 2. This invention addresses the issue that traditional manual plastering relies on worker experience, requiring repeated adjustments of the straightedge and calibration of verticality and squareness. This leads to significant human error and easily results in quality defects such as non-square corners, verticality deviations, and uneven edges, resulting in a high rate of rework. By using a spirit level for real-time horizontal calibration, combined with sliding rail limits, smooth T-slider sliding, and an adjustable plastering board structure, mechanized and standardized plastering operations are achieved. This effectively ensures the verticality, squareness, and flatness of wall corners, and provides a uniform and stable compaction and smoothing effect for plaster edges, significantly reducing construction quality defects and rework costs.

[0017] 3. This invention addresses the traditional process of repeatedly adjusting the straightedge and manually applying and smoothing plaster section by section, which is cumbersome, time-consuming, and labor-intensive, requiring a high level of technical expertise from construction workers. By setting up two types of straightedges, namely double-corner and single-corner, it can adapt to different construction scenarios such as single and double external corners, and supports simultaneous plastering on both sides. At the same time, the modular assembly, quick locking, and sliding plastering structure design simplifies the construction process, eliminates the need for repeated adjustment of the benchmark, significantly shortens the plastering time of a single external corner, reduces the difficulty of manual operation, and allows novices to quickly get started, effectively improving overall construction efficiency and saving labor and construction costs.

[0018] 4. This invention utilizes a dual-fixing structure—diagonal support with inclined bracing and bidirectional clamping with clamping components—to effectively counteract external disturbances during plastering, preventing board misalignment and loosening, and ensuring stable baseline throughout the construction process. Each connection point employs limit screws, rolling bearings, and threaded locking structures, resulting in robust assembly, minimal wear, and high overall equipment durability. It can be repeatedly used, reducing construction material costs. Simultaneously, the standardized plastering produces a uniform mortar layer with high compaction, effectively improving the adhesion strength and service life of the wall plaster layer and reducing later problems such as cracking, hollowing, and peeling. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural view of the present invention; Figure 2 This is a three-dimensional structural view of the single-corner backrest of the present invention; Figure 3 This is a three-dimensional structural view of the single-corner backrest of the present invention from another perspective; Figure 4 This is a three-dimensional structural view of the double-corner backrest of the present invention; Figure 5 This is a three-dimensional structural view of the double-corner backrest of the present invention from another perspective.

[0020] In the picture: 1a. Double-corner backrest; 1b. Single-corner backrest; 2. Spirit level; 3. Level the pin; 4. Diagonal bracing; 41. Fixed column; 42. Telescopic rod; 5. Clamping component; 51. Rotating threaded cylinder; 52. Locking stud; 53. Rotating connecting component; 6. Slide rail; 7. Plastering components; 71. Slider; 72. Rotating rod; 73. Plastering board. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Please see Figure 1-5 This invention discloses a wall corner plastering backing device, comprising: Double corner backing plate 1a, symmetrically set on both sides of the wall, is used for plastering the two external corners of the wall at the same time; The single-corner backing plate 1b is set at a right angle on both sides of the right angle of the wall and is used for plastering the single external corner of the wall. Both the double-corner backing plate 1a and the single-corner backing plate 1b are made of high-strength hard board, which is not easy to deform and ensures the accuracy of the plastering benchmark. Two sets of level rulers 2 are respectively embedded in the center of the outer surface of the double-corner backing plate 1a and the single-corner backing plate 1b, and keep horizontal and parallel to the backing plate surface. During construction, the horizontal status of the backing plate can be observed in real time and the deviation can be corrected in time, thus avoiding plastering crookedness and unevenness from the source. Two sets of spirit level 2 are installed on the outer surfaces of the double-corner support plate 1a and the single-corner support plate 1b, respectively, for leveling calibration during construction. Leveling pins 3, in at least two sets, are respectively installed inside the double-corner backing plate 1a and the single-corner backing plate 1b. They are used to adapt to the horizontal clamping of uneven walls. The leveling pins 3 adopt a threaded column drive structure. By rotating the outer handle, the operator can drive the threaded column to extend or retract, causing the inner turntable to fit against or move away from the wall surface. For working conditions with uneven walls or deviations in flatness, the extension length of each set of leveling pins 3 can be adjusted individually to achieve complete fit between the backing plate and the uneven wall surface. This fills the technical gap that traditional backing plates cannot adapt to non-standard flatness walls. The groove opened on the inner side of the backing plate can accommodate the turntable, ensuring that there are no protruding gaps when the backing plate fits against the wall surface, resulting in a tighter fit. The diagonal bracing 4, in at least two sets, is symmetrically arranged on the outer wall of the double-corner backing plate 1a and the single-corner backing plate 1b, and is used to clamp the wall between the double-corner backing plate 1a and the single-corner backing plate 1b. Clamping component 5 is provided on the double corner backing plate 1a and is used to clamp the double corner backing plate 1a at the two external corners of the wall. Slide rails 6 are respectively installed on the sides of the double-corner backrest 1a and the single-corner backrest 1b; Plastering component 7 is slidably installed in slide rail 6 and is used for plastering at the external corner of the wall.

[0023] In a specific embodiment, the diagonal brace 4 includes a fixed column 41 disposed on the outer wall of the double-corner back plate 1a and the single-corner back plate 1b, and a telescopic rod 42 rotatably disposed on the fixed column 41.

[0024] In one embodiment, the telescopic rod 42 includes an outer cylinder rotatably mounted on a fixed column 41, an inner cylinder disposed within the outer cylinder, and bolts disposed on the outer cylinder for clamping the inner cylinder. The fixed column 41 of the diagonal brace 4 is welded or bolted to the outer wall of the backing plate. The telescopic rod 42 can rotate freely around the fixed column 41 to adapt to different wall angles and different installation spaces. The telescopic rod 42 adopts a nested telescopic structure of inner and outer cylinders and is locked and positioned by side wall bolts. The support length can be precisely adjusted to form a diagonal support force on the backing plate, offsetting the external force offset during plastering operations and ensuring the stability of the backing plate installation.

[0025] In a specific embodiment, the clamping member 5 includes a rotating threaded cylinder 51 and a rotating connecting member 53 respectively disposed on the outer wall of the two double-corner back plates 1a; It also includes a locking stud 52 rotatably disposed within the rotating connector 53 for threaded connection with the rotating threaded cylinder 51, which is used to clamp the two double-angled plates 1a.

[0026] In one embodiment, the end of the rotating threaded cylinder 51 is provided with an L-shaped rod that is rotatably connected to the double-angled abutment plate 1a, and the double-angled abutment plate 1a is provided with a mounting cylinder for mounting the L-shaped rod, and a limiting screw is provided between the L-shaped rod and the mounting cylinder.

[0027] In a specific embodiment, the rotating connector 53 is L-shaped, and the end of the rotating connector 53 is provided with a mounting cylinder for mounting with the double-corner backing plate 1a. A limiting screw is provided between the rotating connector 53 and the mounting cylinder. The rotating connector 53 and the locking stud 52 are installed through a rolling bearing. The angle can be adjusted by a small rotation to adapt to different wall thicknesses. The locking stud 52 is connected to the rotating connector 53 through the rolling bearing. The rotation is smooth. Through the thread engagement of the locking stud 52 and the rotating threaded cylinder 51, the two double-corner backing plates 1a can be quickly tightened to achieve bidirectional clamping and fixing. The assembly is convenient and the locking is firm.

[0028] In one embodiment, the slide rail 6 is a C-shaped slide rail, and limiting plates are provided at both ends of the slide rail 6.

[0029] In a specific embodiment, the plastering component 7 includes a slider 71 respectively disposed in the slide rail 6, and a rotating rod 72 rotatably disposed in the slider 71; It also includes a plastering board 73 that is movably mounted on the rotating rod 72. The plastering board 73 slides on the rotating rod 72 to adapt to plastering in different positions.

[0030] In one embodiment, the slider 71 is adapted to the slide rail 6, and the slider 71 is a T-shaped block. The limiting plate effectively restricts the sliding range of the slider 71, preventing the slider 71 from dislodging from the slide rail 6 during plastering operations. The T-shaped slider 71 and the C-shaped slide rail 6 are precisely adapted, with small sliding gap and high stability, and can slide smoothly vertically along the slide rail 6. The rotating rod 72 on the inner side of the slider 71 can rotate slightly 360°, driving the plastering board 73 to adjust the working angle, perfectly adapting to the right-angle plastering and polishing operations of 90° wall external corners, ensuring that the external corners are square, flat and smooth.

[0031] In a specific embodiment, the leveling pin 3 includes a threaded post that passes through the double-corner back plate 1a and the single-corner back plate 1b, and the end of the threaded post is provided with a handle, and the other end of the threaded post is provided with a turntable. The double-corner back plate 1a and the single-corner back plate 1b are provided with a groove adapted to the turntable on the side near the wall.

[0032] When only a single external corner of a wall needs to be plastered at the construction site, a single-corner support plate 1b is selected. The single-corner support plate 1b is attached to the two sides of the right angle of the wall. By adjusting the extension length of each set of leveling pins 3, the wall surface unevenness is adapted to the levelness of the support plate. Referring to the external level 2, the extension rod 42 of the diagonal brace 4 is rotated to adjust the support length and lock it to complete the stable positioning of the single-corner support plate 1b. Finally, the plastering part 7 is driven to slide vertically along the slide rail 6, and the plastering board 73 completes the overall plastering and smoothing of the external corner.

[0033] When plastering both external corners of a wall simultaneously at the construction site, two corner bracing plates 1a are symmetrically arranged to fit the external corners on both sides of the wall. The fit and levelness of the bracing plates are calibrated using leveling pins 3. The diagonal bracing pieces 4 are adjusted to complete the initial support and fixation. The locking studs 52 of the clamping pieces 5 are then threaded into the rotating threaded cylinder 51 to achieve bidirectional clamping and reinforcement of the two corner bracing plates 1a. After calibration is confirmed, the plastering pieces 7 on both sides are slid synchronously to complete the simultaneous plastering of the two external corners, significantly improving construction efficiency. When using the device, clean the dust, scum, and debris from the surface of the wall corner base to ensure a clean construction surface. Depending on the number of corners (single or double), select either a single-corner support plate 1b or a double-corner support plate 1a. Check the integrity of all components and confirm that the sliding structures of the leveling pins 3, diagonal braces 4, clamping parts 5, and plastering parts 7 are operating normally. Fit the selected support plate structure onto the two sides of the wall corner, initially adjusting the position to align it with the wall corner reference, leaving room for the standard plaster thickness. Observe the gap between the support plate and the wall surface. Rotate the adjustment handles of each set of leveling pins 3 one by one, adjusting the extension length of the threaded column according to the wall's unevenness to ensure the end turntable fits tightly against the wall, eliminating any gaps. Simultaneously observe the reading on the level ruler 2 and fine-tune the support plate posture to ensure the entire support plate is level, completing the reference calibration. Rotate the telescopic rod 42 to adjust the overall support length of the inner and outer cylinders, ensuring the end of the telescopic rod 42 is pressed against the wall surface. Alternatively, after adjusting the base surface to the correct position, tighten the outer bolts to secure the diagonal brace. If it is a double external corner construction, operate the clamping part 5, rotate the locking stud 52 to engage with the threaded cylinder 51, and tighten the double corner plates 1a on both sides to achieve bidirectional clamping reinforcement, ensuring that the plates are not loose or offset. According to the angle of the external corner of the wall, rotate the inner rotating rod 72 of the slider 71 to fine-tune the working angle of the plastering board 73 so that it perfectly fits the right angle surface of the external corner, and evenly apply the plastering mortar. Spread the plaster on the wall surface to be constructed, manually drive the plastering component 7 to slide vertically from top to bottom at a uniform speed along the C-shaped slide rail 6, complete the integrated operation of mortar leveling, compaction, and edge smoothing, ensuring that the plaster layer thickness is uniform and the edges are square. After the plastering of a single external corner is formed and initially set, loosen the clamping component 5 and the diagonal support component 4 in the opposite direction, shrink the leveling pin 3, and smoothly remove the backing plate device. Clean the residual mortar on the surface of the equipment, reset all adjustment components, store and then proceed to the next construction point.

[0034] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0035] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0036] Additionally, "multiple" refers to two or more.

[0037] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A wall corner plastering backing device, characterized in that, include: Double corner backing plates (1a) are symmetrically set on both sides of the wall and are used for plastering the two external corners of the wall at the same time; The single-corner backing board (1b) is set at a right angle on both sides of the right angle of the wall and is used for plastering the single external corner of the wall; Level ruler (2), in two sets, is set on the outer surface of the double-corner backing plate (1a) and the single-corner backing plate (1b) respectively, for level calibration during construction; Leveling pins (3) are provided in at least two sets, which are respectively installed inside the double-corner backing plate (1a) and the single-corner backing plate (1b) to accommodate uneven walls for horizontal clamping. The diagonal bracing (4) consists of at least two sets, which are symmetrically arranged on the outer walls of the double-corner backing plate (1a) and the single-corner backing plate (1b) to clamp the wall between the double-corner backing plate (1a) and the single-corner backing plate (1b). Clamping element (5) is provided on the double corner back plate (1a) for clamping the double corner back plate (1a) at the two external corners of the wall; Slide rails (6) are respectively set on the sides of the double-corner backrest (1a) and the single-corner backrest (1b); Plastering component (7) is slidably set in slide rail (6) and used for plastering at the external corner of the wall.

2. The wall corner plastering backing device according to claim 1, characterized in that: The diagonal brace (4) includes a fixed column (41) disposed on the outer wall of the double-corner back plate (1a) and the single-corner back plate (1b), and a telescopic rod (42) rotatably disposed on the fixed column (41).

3. The wall corner plastering backing device according to claim 2, characterized in that: The telescopic rod (42) includes an outer cylinder rotatably mounted on a fixed column (41), an inner cylinder disposed inside the outer cylinder, and bolts disposed on the outer cylinder for clamping the inner cylinder.

4. The wall corner plastering backing device according to claim 1, characterized in that: The clamping member (5) includes a rotating threaded cylinder (51) and a rotating connector (53) respectively disposed on the outer wall of the two double-corner back plates (1a); It also includes a locking stud (52) rotatably disposed in the rotating connector (53) for threaded connection with the rotating threaded cylinder (51), which is used to clamp the two double-angled plates (1a).

5. The wall corner plastering backing device according to claim 4, characterized in that: The end of the rotating threaded cylinder (51) is provided with an L-shaped rod that is rotatably connected to the double-angled back plate (1a), and the double-angled back plate (1a) is provided with a mounting cylinder for mounting the L-shaped rod, and a limiting screw is provided between the L-shaped rod and the mounting cylinder.

6. The wall corner plastering backing device according to claim 4, characterized in that: The rotating connector (53) is L-shaped, and the end of the rotating connector (53) is provided with a mounting cylinder for mounting with the double-corner back plate (1a), and a limiting screw is provided between the rotating connector (53) and the mounting cylinder. The rotating connector (53) and the locking stud (52) are mounted by a rolling bearing.

7. The wall corner plastering backing device according to claim 1, characterized in that: The slide rail (6) is a C-shaped slide rail, and the two ends of the slide rail (6) are provided with limiting plates.

8. The wall corner plastering backing device according to claim 1, characterized in that: The plastering component (7) includes a slider (71) respectively disposed in the slide rail (6) and a rotating rod (72) rotatably disposed in the slider (71). It also includes a plasterboard (73) that is movable on the rotating rod (72).

9. The wall corner plastering backing device according to claim 8, characterized in that: The slider (71) is adapted to the slide rail (6), and the slider (71) is a T-shaped block.

10. The wall corner plastering backing device according to claim 1, characterized in that: The leveling pin (3) includes a threaded post that passes through the double-angle back plate (1a) and the single-angle back plate (1b), and the end of the threaded post is provided with a handle, and the other end of the threaded post is provided with a turntable. The double-angle back plate (1a) and the single-angle back plate (1b) are provided with a groove adapted to the turntable on the side near the wall.

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