A detachable corner plastering device

Abstract

A detachable corner plastering device includes two trowel blades, four supports, two L-shaped iron angle brackets, and four ball bearing linear guide rail devices. The device is characterized by: each of the two trowel blades having a handle (1); the supports (6) being strip-shaped steel plates with bolt holes at both ends; and the guide rail devices being linear guide rail devices (4) with elongated bases to allow the slider to circulate the steel balls via a ball return groove and ball retainer structure. This detachable corner plastering device has the advantages of circulating the steel balls via a ball return groove and ball retainer structure, allowing for a large permissible load capacity, facilitating low-friction linear movement of the slider carrying the trowel blades on the guide rail, easy portability, improved plastering efficiency, reduced time costs, reduced construction costs, and the ability to repair damaged corners while saving labor and time costs.

Description

Technical Field

[0001] This utility model relates to a plastering tool, specifically a detachable corner plastering device. Background Technology

[0002] With the rapid development of the construction industry, not only do construction sites provide valuable experience, but plastering also plays a crucial role. Traditional plastering techniques are labor-intensive, time-consuming, and prone to quality defects such as uneven corners, leading to increased maintenance costs later on. Furthermore, external corners are easily damaged during construction, affecting the building's aesthetics and integrity.

[0003] Chinese patent CN215716944U, published on February 1, 2022, discloses a dual-purpose corner plastering tool. Both the inside and outside corner cutters are constructed of right-angled steel sheets. The inside corner bend lines of the inside corner cutter and the outside corner bend lines of the outside corner cutter intersect. The two upper edges of the outside corner cutter extend to the working surface of the inside corner cutter, and the two upper edges of the inside corner cutter also extend to the working surface of the outside corner cutter. A connector is also included at the bottom of the inside and outside corner cutters. The device has an integrated structure, is small in size, and is portable and lightweight. While this device can plaster inside and outside corners, its structural stability is insufficient, the handle placement is unreasonable, and it is not convenient for effective work on large areas of inside and outside corners.

[0004] Chinese patent CN213806435U, published on July 27, 2021, discloses a corner plastering tool, comprising a right-angled plastering board with an inner side forming an outer corner plastering surface and an outer side forming an inner corner plastering surface; a handle with both ends rotatably connected to the two ends of the plastering board along its length, and the handle being able to rotate 360° around its hinge axis with the plastering board. This device has both outer and inner corner plastering functions, and allows for quick changes in handle direction. However, this device cannot precisely limit the angle of the inner and outer corners, and positional deviations may occur due to human factors.

[0005] Therefore, the known tools for plastering inside and outside corners have all the aforementioned inconveniences and problems. Utility Model Content

[0006] The purpose of this invention is to propose a detachable corner plastering device that can achieve precise angles.

[0007] To achieve the above objectives, the technical solution of this utility model is: A detachable corner plastering device includes two plaster blades, four supports, two L-shaped iron angle brackets, and four ball bearing linear guide rail devices, characterized in that: Each of the two trowel blades is equipped with a handle, and the handle is equipped with an anti-slip strip to facilitate the operation of the trowel by construction workers; The support is a strip steel plate with bolt holes at both ends. Adjacent supports are aligned by two L-shaped iron angle brackets and connected and fixed with bolts to ensure the stability and accuracy of the external corner plastering and to allow the trowel to run smoothly. The trowel is embedded in the support and can make reciprocating linear motion on the guide rail, which makes it easy for the support to carry the trowel through the linear guide rail device. The guide rail device is a linear guide rail device. The linear guide rail device has a long strip-shaped base, and a slider that slides along the guide rail is provided above the long strip-shaped base. The upper surface of the long strip-shaped base has spaced ball return grooves, and the lower part of the slider has balls that cooperate with the ball return grooves. Each end of the long strip-shaped base has a limiting block so that the slider can make the steel balls circulate through the ball return grooves and the ball retainer structure.

[0008] The detachable corner plastering device of this utility model can also be further realized by the following technical measures.

[0009] The aforementioned detachable corner plastering device, wherein the ball bearing is provided with a rolling groove so that the ball bearing rolls on the rolling groove.

[0010] The aforementioned detachable corner plastering device includes bolt holes at each end of the L-shaped iron angle bracket.

[0011] After adopting the above technical solution, the detachable corner plastering device of this utility model has the following advantages: 1. The guide rail adopts a standard medium-load ball linear guide rail device. Through the ball return groove, ball retainer and other structures, the steel balls are made to circulate. Because it is a point-to-surface contact, the frictional resistance is very small. The balls have their own rolling grooves, and the force on the rotating surface is dispersed. Therefore, it has a large allowable load and facilitates the low-friction linear motion of the slider carrying the trowel blade on the guide rail. 2. It is easy to carry and all connections are firm and reliable. In addition, the use of plastering device also reduces the problem of uneven corners caused by human factors, improves plastering efficiency, reduces time costs, and thus saves construction costs. 3. Repair damaged corners to save on labor and time costs. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the detachable corner plastering device according to an embodiment of the present utility model; Figure 2 This is a schematic diagram of the support connection of the corner plastering device according to an embodiment of the present utility model; Figure 3 This is a schematic diagram of the corner plastering device according to an embodiment of the present utility model; Figure 4 This is a schematic diagram of the support connection of the corner plastering device according to an embodiment of the present utility model; Figure 5 This is a schematic diagram of the guide rail for the corner plastering device according to an embodiment of the present invention.

[0013] In the diagram: 1. Handle; 2. Bolt; 3. Limiting block; 4. Ball linear guide; 5. Slider; 6. Support; 7. Spare squeegee; 8. L-shaped iron bracket. Detailed Implementation

[0014] The present invention will be further described below with reference to the embodiments and accompanying drawings.

[0015] Example 1 Please see now Figure 1-5 This utility model discloses a detachable corner plastering device, comprising two trowel blades, four supports, two L-shaped iron angle brackets, and four standard medium-load ball bearing linear guide rail devices. The supports and standard medium-load ball bearing linear guide rail devices are assembled and connected. The trowel blades are then assembled and connected to the guide rails, and the supports are fixed with L-shaped iron angle brackets. The supports 6 are fixed using L-shaped iron angle brackets and bolts to ensure precise angles. The slider 5 and the trowel 7 employ an embedded structure; specifically, the slider 5 and the trowel blade 7 are connected in an embedded manner. Specifically, the embedded connection can be achieved in the following ways: Slot connection: A slot matching the edge of the trowel blade 7 is provided on the slider 5. After the trowel blade 7 is inserted, it is fixed by a limiting protrusion, achieving a stable fit; Screw fixing: Threaded holes are provided on both the slider 5 and the trowel blade 7, and screws are used for tightening to enhance the reliability of the connection; Welding fixing: For long-term fixed applications, spot welding or full welding can be used to weld the trowel blade 7 and the slider 5 together; Removable buckle: An elastic buckle is provided on the slider 5. After the trowel blade 7 is inserted, it is locked by the buckle, facilitating disassembly and replacement. The ball linear guide 4 adopts a standard medium-load ball linear guide device. Through the ball return groove, ball retainer, and other structures, the steel balls circulate, thereby achieving low-friction linear motion of the slider on the guide rail. Anti-slip strips are used at the handle 1 for easy operation by construction workers. After the entire plastering device is fixed, it is adjusted to the inside / outside corner mode according to the usage requirements. The device is then fixed at the inside / outside corner, and plastering is performed by the trowel blade 7 moving laterally in a straight line.

[0016] Example 2 How to use the detachable corner plastering device of this utility model: 1. When plastering external corners, L-shaped iron angle brackets 8 are used to align, connect, and fix the supports, and bolts 2 are used for reinforcement to ensure the stability and accuracy of the external corner plastering, so that the trowel 7 can move smoothly and plaster 90° right angles on walls, columns, beams, etc. The handle 1 is equipped with anti-slip strips to facilitate the lateral movement of the trowel 7. The trowel 7 and the slider 5 adopt an embedded structure. The ball linear guide 4 is a standard medium-load ball linear guide with point-to-surface contact, so the frictional resistance is very small, allowing the support 6 and the embedded trowel 7 to make reciprocating linear motion on the transverse guide. The balls have their own rolling grooves, and the force on the rotating surface is distributed, so there is a large allowable load, which makes it easy for the support 6 to carry the trowel 7 through the ball linear guide 4 to work, improving plastering efficiency. Limiting blocks 3 are set at both ends of the ball linear guide 4 to prevent the slider 5 and the trowel 7 from deviating from the track during use and to reduce friction, ensuring the stability of the entire component.

[0017] 2. When plastering inside corners, L-shaped iron angle brackets 8 are used to ensure right angles between the supports, and then bolts 2 are used for direct fixing. The specific plastering operation method is the same as that for plastering outside corners.

[0018] The device can be adjusted using the above methods to achieve precise angle plastering of inside and outside corners according to different usage requirements. The detachable design ensures the portability of the device, and the standard medium-load ball linear guide greatly improves the linear motion efficiency of the trowel and improves plastering efficiency.

[0019] This utility model possesses substantial features and significant technological advancements. The detachable corner plastering device of this utility model employs a standard medium-load ball linear guide rail. Through structures such as ball return grooves and ball retainers, the steel balls circulate. Due to point-to-surface contact, frictional resistance is minimal. The balls have their own rolling grooves, dispersing the force on the rotating surface, thus allowing for a larger permissible load. This facilitates low-friction linear movement of the slider carrying the trowel blade on the guide rail. The device is detachable for easy transport, and all connections are secure and reliable. Using this plastering device also reduces the problem of uneven corners caused by human error, improving plastering efficiency, reducing time costs, and ultimately saving on construction costs. Furthermore, this device can repair damaged corners, saving labor and time costs.

[0020] The above embodiments are for illustrative purposes only and are not intended to limit the scope of this utility model. Those skilled in the art can make various modifications and variations without departing from the spirit and scope of this utility model. Therefore, all equivalent technical solutions should also fall within the scope of this utility model and should be defined by the claims.

Claims

1. A detachable corner plastering device, comprising a plaster blade (7), a support (6), an L-shaped iron corner bracket (8), and a ball bearing linear guide rail (4), characterized in that: The spatula (7) is detachably mounted on the ball linear guide (4) via the slider (5), and the slider (5) can reciprocate linearly along the guide (4); The support (6) is fixedly connected to the bolt (2) by the L-shaped iron angle bracket (8), thereby limiting the angle of the inside and outside corners; The linear guide (4) includes a base, a limiting block (3) set at both ends of the base, a slider (5) set above the base, a ball return groove on the surface of the base and a ball set below the slider (5). The ball forms a cyclic motion in the ball return groove, thereby enabling the trowel blade (7) to perform low-friction linear plastering operation.

2. The device of claim 1, wherein, The slider (5) and the spatula (7) are connected by an embedded connection.

3. The device of claim 2, wherein, The embedded connection is achieved through a slot-type structure, that is, a slot is set on the slider (5), and the spatula (7) is fixed by the limiting protrusion after being inserted.

4. The detachable corner plastering device according to claim 2, characterized in that, The embedded connection is achieved by screw fixing, that is, threaded holes are provided on the slider (5) and the spatula (7) respectively, and they are fastened by screws.

5. The device of claim 2, wherein, The embedded connection is achieved by welding, that is, the trowel blade (7) and the slider (5) are fixed together by welding.

6. The device of claim 2, wherein, The embedded connection is achieved through a detachable buckle, that is, an elastic buckle is set on the slider (5), and the spatula (7) is locked by the buckle after being embedded.

7. The apparatus of claim 1, wherein, The ball linear guide (4) is a medium-load ball linear guide, and the balls are provided with rolling grooves to distribute the force and improve the load-bearing capacity.

8. The device of claim 1, wherein, A handle (1) is provided on the trowel blade (7). The handle (1) has an anti-slip strip structure so that construction personnel can hold and operate it.

9. The device of claim 1, wherein, The L-shaped iron angle bracket (8) has bolt holes at both ends.

10. The device of claim 1, wherein, The limiting block (3) is set at both ends of the linear guide rail (4) to prevent the slider (5) and the spatula (7) from deviating from the track.

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