Stair step painting tool

Abstract

The utility model relates to a stair step painting tool which comprises a brush head, a lengthening rod, a handle, a balance plate and a reset spring. The brush head comprises a forming plate and a limiting plate, the limiting plate is perpendicularly fixed to the lower surface of the forming plate, a plurality of forming bosses are arranged on the lower surface of the forming plate at intervals, and the forming plate and the forming bosses extend in the left-right direction; the upper end of the lengthening rod is fixedly connected with the handle, and the lower end of the lengthening rod is hinged to the upper end face of the forming plate. The balance plate is vertically and fixedly arranged on the lower portion of the lengthening rod in a sleeving mode and distributed above the forming plate in parallel, a reset spring is fixedly connected between the balance plate and the forming plate, and the reset spring is in a pre-compression state in a normal state. After the handle is lengthened, the stability of the brush head can still be kept, smooth operation experience is provided, the instability problem caused by torque increase is reduced, and therefore the construction quality and efficiency are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of building construction, and particularly relates to a stair tread painting tool. Background Art

[0002] In the construction process of cement mortar stair treads, due to the problems of smooth surface and poor anti-slip effect in the traditional cement mortar surface decoration, anti-slip strips need to be set according to the specification requirements to increase the friction at the stair tread openings and prevent pedestrians from accidentally falling when going up and down the stairs.

[0003] The utility model patent with the patent number CN218467015U discloses a stair anti-slip strip construction and forming device. The upper flat plate and the lower flat plate are respectively bent by 90° to form bent flat plates with opposite directions. A plurality of grooves or protrusions are arranged on the inner surface of the horizontal section of the lower flat plate, and fixing nuts are arranged on the outer surface of the lower flat plate, and an operating handle is vertically connected through the fixing nuts, which can quickly paint the stair tread surface layer and form anti-slip strips.

[0004] However, in the above-mentioned prior art, the length of the handle is short, and workers need to crouch or bend down during construction. Long-term crouching operation will not only quickly increase the fatigue of workers, exacerbate physical consumption and discomfort, but also cause operation errors due to the visual angle changes caused by bending and crouching; while standing operation can not only make the movements of workers more flexible, reduce unnecessary posture adjustments, significantly improve the construction speed, but also provide better vision and control, ensuring the flatness of the stair surface layer and the consistency of the anti-slip grooves.

[0005] However, after the existing handle is lengthened, the moment between the handle and the brush head will increase, the brush head is easy to shake and tilt, and it will be more difficult for workers to control the painting tool. After continuous use, it may lead to uneven force application, further exacerbating the shaking and tilting problems of the brush head, affecting the stability of the painting tool and the construction quality. Seriously, it may cause the forming part to tilt and pierce into the upper surface of the stair tread, causing damage.

[0006] Based on this, it is necessary to study a stair tread painting tool. Utility Model Content

[0007] In view of this, the purpose of the utility model is to provide a stair tread painting tool, which can effectively solve the problem of the instability of the brush head caused by the increase in moment after the handle is lengthened.

[0008] To achieve the above purpose, the technical solution adopted by the utility model is:

[0009] A stair tread painting tool, comprising a brush head, an extension rod, a handle, a balance plate and a return spring;

[0010] The brush head includes a forming plate and a limiting plate. The limiting plate is vertically fixed to the lower surface of the forming plate. A plurality of forming bosses are arranged at intervals on the lower surface of the forming plate. Both the forming plate and the forming bosses extend in the left-right direction.

[0011] The upper end of the extension rod is fixedly connected to the handle, and the lower end of the extension rod is hingedly connected to the upper end surface of the forming plate.

[0012] The balance plate is vertically and fixedly sleeved on the lower part of the extension rod and is parallelly distributed above the forming plate. A return spring is fixedly connected between the balance plate and the forming plate. The return spring is in a pre-compressed state under normal conditions.

[0013] Further, a hinge seat is arranged on the upper end surface of the forming plate, and a rotating shaft is arranged through the hinge seat in the front-back direction.

[0014] The lower end of the extension rod is hingedly connected to the hinge seat through the rotating shaft, so that the extension rod can rotate in the left-right direction.

[0015] Further, two groups of return springs are provided and are symmetrically arranged on the left and right sides of the extension rod.

[0016] Further, chamfer angles are arranged at the internal corners of the forming plate and the limiting plate.

[0017] Further, the handle is of an L-shaped rod structure. The orientation of the handle is perpendicular to the length direction of the forming plate. The handle and the limiting plate are located on the same side of the forming plate.

[0018] Further, the extension rod is a telescopic rod with adjustable length.

[0019] The beneficial effects of the above technical solutions are as follows:

[0020] In the present utility model, the lower end of the extension rod is rotatably arranged left and right on the upper end surface of the forming plate. The balance plate is vertically and fixedly sleeved on the lower part of the extension rod and is parallelly distributed above the forming plate. A return spring is fixedly connected between the balance plate and the forming plate. Under normal conditions, the return spring is in a pre-compressed state and provides a supporting force between the balance plate and the forming plate, showing a certain initial rigidity, keeping the forming plate and the balance plate parallel, and making the connection effect between the extension rod and the brush head show an almost rigid connection effect, ensuring the initial stability of the operation. When the lower end of the extension rod rotates relative to the forming plate, the balance plate will tilt as the extension rod rotates. The torque generated by the extension rod acts on the return spring, and the return spring will deform and generate a restoring force to force the balance plate and the forming plate back to a parallel state, correcting the operation of the worker and maintaining the continuity and stability of the operation.

[0021] In addition, the restoring force generated by the return spring can effectively counteract the overturning moment and torque generated by the tilt of the handle, thereby eliminating jitter, ensuring the horizontality and stability of the brush head, and ensuring the stability of the brush head during the operation process.

[0022] In summary, after the handle of the present utility model is lengthened, the stability of the brush head can still be maintained, a smooth operation experience is provided, the instability problem caused by the increase in torque is reduced, thereby improving the construction quality and efficiency. Description of the Drawings

[0023] Figure 1 is a schematic diagram of the present utility model in the normal state;

[0024] Figure 2 is Figure 1 a side sectional view taken along the direction A-A in

[0025] Figure 3 is a schematic diagram when the extension rod is tilted.

[0026] Reference numerals: 1 is the brush head, 2 is the extension rod, 3 is the handle, 4 is the balance plate, 5 is the return spring, 6 is the hinge seat, 7 is the rotating shaft, 101 is the forming plate, 102 is the limiting plate, 103 is the forming boss, and 104 is the bevel angle. Detailed Embodiment

[0027] The present utility model will be further described in detail below in conjunction with the drawings and specific embodiments:

[0028] This embodiment aims to provide a staircase tread painting tool, which is mainly used to paint anti-slip strips on the surface layer of staircase treads, aiming to solve the problem of instability of the brush head 1 caused by the increase in torque after the handle 3 is lengthened.

[0029] A staircase tread painting tool, as Figure 1 and Figure 2 , includes a brush head 1, an extension rod 2, a handle 3, a balance plate 4 and a return spring 5; the brush head 1 includes a forming plate 101 and a limiting plate 102, and the limiting plate 102 is vertically fixed on the lower surface of the forming plate 101, mainly used to fit with the side surface of the staircase tread to achieve a limiting effect; a plurality of forming bosses 103 are arranged at intervals on the lower surface of the forming plate 101, and both the forming plate 101 and the forming bosses 103 extend in the left-right direction. The left-right direction refers to the left-right direction in Figure 1 , and is also the translation direction when using the painting tool. When the forming plate 101 is in contact with the upper surface of the staircase tread and the limiting surface is in contact with the side surface of the staircase tread, translating the painting tool in the left-right direction, the forming bosses 103 will leave concave anti-slip strips on the upper surface of the staircase tread.

[0030] The upper end of the extension rod 2 is fixedly connected to the handle 3, and the lower end of the extension rod 2 is hingedly connected to the upper end surface of the forming plate 101; an articulated seat 6 is provided on the upper end surface of the forming plate 101, and a rotating shaft 7 is passed through the articulated seat 6 in the front-rear direction; the lower end of the extension rod 2 is hingedly connected to the articulated seat 6 through the rotating shaft 7, so that the extension rod 2 can rotate in the left-right direction, that is, the extension rod 2 can rotate in the translation direction of using the painting tool.

[0031] The balance plate 4 is vertically and fixedly sleeved on the lower part of the extension rod 2 and is parallelly distributed above the forming plate 101. A return spring 5 is fixedly connected between the opposite surfaces of the balance plate 4 and the forming plate 101. The return spring 5 is in a pre-compressed state under normal conditions and will provide a supporting force between the balance plate 4 and the forming plate 101, showing a certain initial rigidity, keeping the forming plate 101 parallel to the balance plate 4, and making the connection effect between the extension rod 2 and the brush head 1 show an almost rigid connection effect, ensuring the initial stability of the operation.

[0032] As Figure 3 , when the lower end of the extension rod 2 rotates relative to the forming plate 101, the balance plate 4 will tilt as the extension rod 2 rotates. The torque generated by the extension rod 2 will act on the return spring 5 through the balance plate 4. The return spring 5 will deform and generate a restoring force. The restoring force tends to pull the balance plate 4 and the forming plate 101 back to the parallel state, offsetting the overturning torque caused by the tilt of the handle 3, ensuring the horizontal and stability of the brush head 1, providing a smooth operation experience, and at the same time correcting the worker's operation, keeping the balance plate 4 horizontal, enabling the tool to move correctly horizontally, and preventing the brush head 1 from tipping over and damaging the surface of the stair tread.

[0033] Two groups of return springs 5 are provided and are symmetrically arranged on the left and right sides of the extension rod 2. When the lower end of the extension rod 2 rotates to the right relative to the forming plate 101, as Figure 3 , the return spring 5 on its right side is further compressed, while the spring on the left side tends to be stretched, forming a torque rotating to the left to offset the torque of the extension rod 2 and offsetting the instability caused by the tilt of the handle 3. In other embodiments, four or more groups of return springs 5 can also be symmetrically arranged, or a group can be provided in the middle of the balance plate 4.

[0034] Furthermore, an inclined angle 104 is provided at the inner corner of the forming plate 101 and the limiting plate 102, which can chamfer the outer corner of the staircase to avoid forming a sharp edge.

[0035] To further facilitate length adjustment and storage, the extension rod 2 is a telescopic rod with adjustable length. The design of the extension rod 2 can meet the standing operation of workers. It can not only make the workers' movements more flexible, reduce unnecessary posture adjustments, significantly improve the construction speed, but also provide better vision and control, ensuring the flatness of the stair surface layer and the consistency of the anti-slip grooves. The design of the telescopic rod can adjust the length according to the actual working posture required, and also facilitate the storage and arrangement of tools.

[0036] The handle 3 is of an L-shaped rod structure. The orientation of the handle 3 is perpendicular to the length direction of the forming plate 101. The handle 3 and the limiting plate 102 are located on the same side of the forming plate 101. When holding the handle 3, it is convenient to move the painting tool horizontally in the left and right directions.

Claims

1. A stair tread painting tool, characterized in that: It comprises a brush head (1), an extension rod (2), a handle (3), a balance plate (4) and a return spring (5); The brush head (1) comprises a forming plate (101) and a limiting plate (102), wherein the limiting plate (102) is vertically fixed on the lower surface of the forming plate (101), and a plurality of forming bosses (103) are arranged at intervals on the lower surface of the forming plate (101), and the forming plate (101) and the forming bosses (103) both extend in the left-right direction; The upper end of the extension rod (2) is fixedly connected to the handle (3), and the lower end of the extension rod (2) is hingedly connected to the upper end surface of the forming plate (101); The balancing plate (4) is vertically fixedly sleeved on the lower part of the extension rod (2) and is distributed in parallel above the forming plate (101). A return spring (5) is fixedly connected between the balancing plate (4) and the forming plate (101). The return spring (5) is in a pre-compressed state under normal conditions.

2. A stair tread painting tool according to claim 1, characterized in that: The upper end surface of the forming plate (101) is provided with a hinge seat (6), and a rotating shaft (7) is passed through the hinge seat (6) along the front-to-back direction; The lower end of the extension rod (2) is hingedly connected to the hinge seat (6) via a rotating shaft (7), so that the extension rod (2) can rotate in left and right directions.

3. A stair tread painting tool according to claim 1, characterized in that: The return springs (5) are provided in two groups and are symmetrically arranged on the left and right sides of the extension rod (2).

4. A stair tread painting tool according to claim 1, characterized in that: Bevels (104) are provided at the inner corners of the forming plate (101) and the limiting plate (102).

5. A stair tread painting tool according to claim 1, characterized in that: The handle (3) is an L-shaped rod structure; the direction of the handle (3) is perpendicular to the length direction of the forming plate (101); the handle (3) and the limiting plate (102) are located on the same side of the forming plate (101).

6. A stair tread painting tool according to any one of claims 1 to 5, characterized in that: The extension rod (2) is a telescopic rod with adjustable length.

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