阅读说明：本技术 内墙涂刷工艺 (Inner wall painting process ) 是由 彭苏诺 彭志远 于 2021-10-18 设计创作，主要内容包括：本申请公开了内墙涂刷工艺,包括如下步骤：步骤S1：内墙清理准备工作：步骤S2：调制界面剂；步骤S3：利用滚涂工具在基层表面涂刷一层界面剂；滚涂工具包括手柄、安装架和刷筒,安装架连接于手柄的一端,刷筒包括筒芯和覆盖筒芯外周面的刷毛,筒芯的两端分别突出设置有转轴,转轴与安装架转动连接,筒芯穿设有配重件,配重件偏离筒芯的轴心,安装架设有用于刮动刷毛的刮杆,刮杆与筒芯的轴线平行；步骤S4：晾置干燥；步骤S5：养护与成品保护；步骤S6：待界面剂晾置干燥后,用滚涂工具涂刷面漆。本申请中的滚涂工具蘸完涂料后过量的涂料可通过刮杆刮下,有利于减少等待涂料滴沥的时长,提高工作效率。(The application discloses an inner wall painting process, which comprises the following steps: step S1: inner wall cleaning preparation work: step S2: preparing an interface agent; step S3: coating a layer of interface agent on the surface of the base layer by using a roller coating tool; the roller coating tool comprises a handle, an installation frame and a brush barrel, wherein the installation frame is connected to one end of the handle, the brush barrel comprises a barrel core and brush bristles covering the peripheral surface of the barrel core, rotating shafts are respectively arranged at two ends of the barrel core in a protruding mode, the rotating shafts are rotatably connected with the installation frame, a counterweight part penetrates through the barrel core, the counterweight part deviates from the axis of the barrel core, a scraping rod used for scraping the brush bristles is arranged on the installation frame, and the scraping rod is parallel to the axis of the barrel core; step S4: drying in the air; step S5: maintaining and protecting finished products; step S6: and after the interface agent is dried in the air, painting finish paint by using a rolling painting tool. Excessive coating accessible scraping the pole after the instrument of scribbling in this application dips in coating and scrapes down, is favorable to reducing the length of time of waiting for the coating drippage, improves work efficiency.)

1. The inner wall painting process is characterized by comprising the following steps: the method comprises the following steps:

step S1: inner wall cleaning preparation work:

step S11: cleaning burrs on the surface of a base layer of the inner wall, and filling up partial pits of the base layer with gypsum putty;

step S2: preparing an interface agent: mixing the interfacial agent with water and stirring;

step S3: coating a layer of interface agent on the surface of the base layer by using a roller coating tool (1); the roller coating tool (1) comprises a handle (11), an installation frame (12) and a brush barrel (13), wherein the installation frame (12) is connected to one end of the handle (11), the brush barrel (13) comprises a barrel core (131) and bristles (132) covering the peripheral surface of the barrel core (131), two ends of the barrel core (131) are respectively provided with a rotating shaft (133) in a protruding mode, the rotating shaft (133) is rotatably connected with the installation frame (12), a counterweight (134) penetrates through the barrel core (131), the counterweight (134) deviates from the axis of the barrel core (131), the installation frame (12) is provided with a scraping rod (14) for scraping the bristles (132), and the scraping rod (14) is parallel to the axis of the barrel core (131);

step S4: drying in the air;

step S5: maintaining and protecting finished products;

step S6: and after the interface agent is dried in the air, painting finish paint by using a roller painting tool (1).

2. The interior wall painting process according to claim 1, wherein: step S1 further includes step S12: the antifouling belt (2) is pasted on the window frame and the door frame embedded in the inner wall, the length direction of the antifouling belt (2) is along the extending direction of the window frame or the door frame, the antifouling belt (2) is pasted with the door frame or the window frame through two ends, then one adhesive tape (3) is pasted on the surface of the antifouling belt (2), and the antifouling belt (2) is exposed at one side part of the adhesive tape (3) close to the base layer and is bonded with the window frame or the door frame.

3. The interior wall painting process according to claim 1, wherein: the mounting frame (12) comprises a cross rod (121) and two longitudinal rods (122), the cross rod (121) is vertically and fixedly connected with the handle (11), the two longitudinal rods (122) are respectively located at two ends of the cross rod (121), the two longitudinal rods (122) are respectively connected with a first sliding block (15) in a sliding mode along the length direction of the longitudinal rods (122), and the longitudinal rods (122) are provided with springback components (17) for forcing the first sliding blocks (15) to be far away from the cross rod (121); the scraping rod (14) is located between the brush barrel (13) and the cross rod (121), the longitudinal rod (122) is connected with a second sliding block (16) in a sliding mode along the length direction of the longitudinal rod (122), friction damping is arranged between the second sliding block (16) and the longitudinal rod (122), and two ends of the scraping rod (14) are connected with the second sliding blocks (16) respectively.

4. The interior wall painting process according to claim 3, wherein: the weight piece (134) is columnar, a first through hole (1311) for the weight piece (134) to penetrate through is formed in the barrel core (131) along the axial direction, threaded holes (1312) are formed in two ends of the first through hole (1311), and plugs (135) are connected to two ends of the barrel core (131) through the threaded holes (1312).

5. The interior wall painting process according to claim 4, wherein: the barrel core (131) is provided with a second through hole (1313), the second through hole (1313) is parallel to the first through hole (1311), two ends of the second through hole (1313) are provided with seal heads (136) used for sealing the second through hole (1313), the center line of the first through hole (1311) and the axis of the barrel core (131) are located on the same plane, and the first through hole (1311) and the second through hole (1313) are located on two sides of the axis of the barrel core (131) respectively.

6. The interior wall painting process according to claim 3, wherein: the two first sliding blocks (15) are positioned between the two longitudinal rods (122); two one side that first slider (15) deviate from mutually is equipped with and corresponds first spout (151) of vertical pole (122) adaptation, vertical pole (122) are equipped with and are used for hindering first slider (15) break away from spacing arch (1221) of vertical pole (122), two one side that second slider (16) deviate from mutually is equipped with and corresponds second spout (161) of vertical pole (122) adaptation.

7. The interior wall painting process according to claim 6, wherein: the rebounding assembly (17) comprises a first magnet (171) and a second magnet (172), the first magnet (171) is fixedly connected with the longitudinal rod (122), the second magnet (172) is fixed on the corresponding first sliding block (15), and a magnetic repulsive force is formed between the first magnet (171) and the second magnet (172).

8. The interior wall painting process according to claim 3, wherein: the rotating shaft (133) is rotatably connected with the first sliding block (15), the rotating shaft (133) is sleeved with a limiting ring (18), the limiting ring (18) is abutted to the first sliding block (15), a set screw (182) penetrates through the limiting ring (18) along the radial direction, and the set screw (182) penetrates through the inner circumferential surface of the limiting ring (18) and is in threaded connection with the rotating shaft (133).

9. The interior wall painting process according to claim 8, wherein: the brush barrel is characterized in that convex teeth (181) are arranged on the periphery of the outer periphery of the limiting ring (18) in a circumferential array mode, a metal shifting piece (19) is fixedly arranged on the scraping rod (14), and when the brush barrel (13) is close to the scraping rod (14), the convex teeth (181) interfere with the metal shifting piece (19).

Technical Field

The application relates to the technical field of building decoration, in particular to an inner wall painting process.

Background

The wall painting is a necessary step for beautifying the wall and a final step of wall construction, and the wall painting not only can beautify the home environment, but also can cover up flaws in the process of wall construction. The wall painting construction work can be carried out by adopting modes of painting, rolling painting, spraying and the like, and different painting tools such as a brush, a rolling painting tool, a spray gun and the like are required to be used corresponding to different wall painting modes.

The roller coating construction by using the roller coating tool has the advantages of large single coating area and higher coating efficiency. However, in the roll coating construction process, after the roll coating tool is dipped with the liquid paint, the roll coating tool is easy to drip when the dip is too much, excessive paint is required to be suspended before the roll brush, and the like, and the construction is carried out after the excessive paint is dripped, and when the roll coating tool is initially contacted with a wall surface, the local paint adhered to the wall surface is too much, and the repeated roll brush is required to be even, so that the working efficiency is influenced.

Disclosure of Invention

In order to solve the problem that the rolling brushing efficiency is influenced by too much dipping materials of a rolling brushing tool in the process of rolling brushing the wall surface, the application provides an inner wall brushing process.

The inner wall painting process provided by the application adopts the following technical scheme:

the inner wall painting process includes the following steps:

step S1: inner wall cleaning preparation work:

step S11: cleaning burrs on the surface of a base layer of the inner wall, and filling up partial pits of the base layer with gypsum putty;

step S2: preparing an interface agent: mixing the interfacial agent with water and stirring;

step S3: coating a layer of interface agent on the surface of the base layer by using a roller coating tool; the roll coating tool comprises a handle, an installation frame and a brush barrel, wherein the installation frame is connected to one end of the handle, the brush barrel comprises a barrel core and brush bristles covering the peripheral surface of the barrel core, rotating shafts are respectively arranged at two ends of the barrel core in a protruding mode, the rotating shafts are rotatably connected with the installation frame, a counterweight is arranged in the barrel core in a penetrating mode, the counterweight deviates from the axis of the barrel core, a scraping rod used for scraping the brush bristles is arranged on the installation frame, and the scraping rod is parallel to the axis of the barrel core;

step S4: drying in the air;

step S5: maintaining and protecting finished products;

step S6: and after the interface agent is dried in the air, painting finish paint by using a rolling painting tool.

By adopting the technical scheme, in the process of painting the inner wall, the brush barrel of the roller coating tool is immersed into the liquid coating, so that the brush barrel is dipped with the coating, when the roller coating tool is lifted upwards, the brush barrel is gradually changed from a state lower than the mounting frame to a state higher than the mounting frame, and because the barrel core of the brush barrel has a overweight characteristic, the brush barrel rotates relative to the mounting frame, so that the scraping rod scrapes the bristles, excessive coating adsorbed on the bristles is scraped, the condition that the coating on the bristles is dripped is reduced, the time for a worker to wait for the dripping of the coating on the bristles is shortened, and the improvement of the working efficiency is facilitated; after the excessive paint on the bristles is scraped, the situation that when the brush barrel initially contacts with a wall surface, the paint is excessively adhered to the part of the wall surface and needs to be repeatedly brushed and evenly brushed can be reduced, and the brushing work efficiency is improved. In addition, the brush cylinder can be repeatedly lifted and put down from different directions, so that the scraping rod scrapes the peripheral sides of the bristles as completely as possible, and the efficiency of scraping coating in a sweeping amount is improved. The process of scraping and sweeping the bristles by the scraping rod does not need to be additionally assisted by an auxiliary tool, and the operation is convenient.

Optionally, the step S1 further includes the step S12: the antifouling belt is pasted on the window frame and the door frame embedded in the inner wall, the length direction of the antifouling belt is along the extending direction of the window frame or the door frame, the antifouling belt is pasted with the door frame or the window frame through two ends, then, an adhesive tape is pasted on the surface of the antifouling belt, and the part of one side of the adhesive tape, which is close to the base layer, is exposed out of the antifouling belt and is bonded with the window frame or the door frame.

When the wall surface is coated, a coating tool is inevitably contacted with a window frame, a door frame and the like, when the coating is dried, the cleaning is inconvenient, and a clean and wiping mark is easy to leave; by adopting the technical scheme, after the window frame and the door frame are covered by the antifouling belt, the adhesive tape is adhered again, and one side part of the adhesive tape close to the base layer is exposed to adhere the window frame or the door frame.

Optionally, the mounting frame includes a cross bar and two longitudinal bars, the cross bar is vertically and fixedly connected with the handle, the two longitudinal bars are respectively located at two ends of the cross bar, the two longitudinal bars are respectively connected with a first sliding block in a sliding manner along the length direction of the two longitudinal bars, and the longitudinal bars are provided with a springback assembly for forcing the first sliding block to be away from the cross bar; the scraping rod is located between the brush barrel and the cross rod, the longitudinal rod is connected with a second sliding block in a sliding mode along the length direction of the longitudinal rod, friction damping is arranged between the second sliding block and the longitudinal rod, and two ends of the scraping rod are connected with the second sliding blocks respectively.

Through adopting above-mentioned technical scheme, the subassembly of kick-backing forces two spacing archs of first slider butt, make a brush section of thick bamboo keep in relatively stable position, scrape after sweeping excessive coating when a brush section of thick bamboo and apply paint before working, can make a brush section of thick bamboo push the inner wall of coating container, make a brush section of thick bamboo overcome the effort of subassembly of kick-backing and be close to the horizontal pole, thereby make a brush section of thick bamboo drive simultaneously and scrape the pole and remove to the direction that is close to the horizontal pole, after a brush section of thick bamboo resets, connect two second sliders of scraping the pole under friction damping's effect, stop the position that reaches after being promoted by a brush section of thick bamboo, make and scrape and keep certain interval between pole and the brush section of thick bamboo, when a brush section of thick bamboo carry out the in-process of brushing to the basic unit, be favorable to avoiding scraping the pole to scrape the condition that brush hair caused the coating to drip as far as possible.

Optionally, the weight is columnar, the barrel core is provided with a first through hole along the axial direction, the first through hole is penetrated by the weight, threaded holes are formed in two ends of the first through hole respectively, and two ends of the barrel core are connected with plugs through the threaded holes respectively.

Through adopting above-mentioned technical scheme, the counterweight is worn to establish with first through-hole and is connected, and the shutoff is carried out through the end cap at the both ends of first through-hole, makes the counterweight encapsulate in first through-hole, and the weight regulation accessible of counterweight changes the material of counterweight or the length realization of configuration piece, through the weight of adjusting the counterweight, is favorable to according to actual need, when satisfying the rotatory needs of brush section of thick bamboo, controls the weight of counterweight, alleviates the load of operation roller coating instrument.

Optionally, the barrel core is provided with a second through hole, the second through hole is parallel to the first through hole, two ends of the second through hole are provided with end sockets for sealing the second through hole, the center line of the first through hole and the axis of the barrel core are located on the same plane, and the first through hole and the second through hole are located on two sides of the axis of the barrel core respectively.

Through adopting above-mentioned technical scheme, the both ends of two head shutoff second through-holes to form confined cavity, second through-hole and first through-hole are located the opposite side of through-hole respectively, are favorable to promoting the heavy effect partially of section of thick bamboo core, can alleviate the weight of section of thick bamboo core simultaneously, weaken the influence of counterweight to the weight of roller coating instrument.

Optionally, the two first sliding blocks are both located between the two longitudinal bars; two one side that first slider deviates from mutually is equipped with and corresponds the first spout of vertical pole adaptation, the vertical pole is equipped with and is used for hindering first slider breaks away from the spacing arch of vertical pole, two one side that the second slider deviates from mutually is equipped with and corresponds the second spout of vertical pole adaptation.

By adopting the technical scheme, the first sliding groove located in the first sliding block and the second sliding groove located in the second sliding block are arranged, so that the sliding groove is prevented from being arranged on the longitudinal rod on the premise that the first sliding block and the second sliding block are respectively connected with the longitudinal rod in a sliding manner, the structure of the longitudinal rod is kept complete, and the requirement on the size of the cross section of the longitudinal rod can be reduced because the groove structure does not need to be arranged on the longitudinal rod, so that the material cost of the longitudinal rod is reduced, and the whole weight of the roller coating tool is reduced; and the length of the first slide block and the second slide block is smaller than that of the longitudinal rod, so that the influence on the overall material cost and the overall weight of the roll coating tool is small even if the cross section size is increased.

Optionally, the rebounding assembly includes a first magnet and a second magnet, the first magnet is fixedly connected to the vertical rod, the second magnet is fixed to the corresponding first slider, and a magnetic repulsion force is provided between the first magnet and the second magnet.

Through adopting above-mentioned technical scheme, the resilience force of resilience subassembly is regarded as to the magnetic repulsion between first magnet and the second magnet, because keep the relative separation between first magnet and the second magnet, is favorable to satisfying under the prerequisite of the resilience demand of resilience subassembly, reduces the condition that the resilience performance reduces because of the surface adheres to deposit coating of resilience subassembly.

Optionally, the rotating shaft is rotatably connected with the first sliding block, the rotating shaft is sleeved with a limiting ring, the limiting ring abuts against the first sliding block, a set screw penetrates through the limiting ring along the radial direction, and the set screw penetrates through the inner circumferential surface of the limiting ring and is in threaded connection with the rotating shaft.

Through adopting above-mentioned technical scheme, holding screw fixes a position the spacing ring, and the spacing ring limits the displacement of a brush section of thick bamboo along axial, and the spacing ring restriction two first sliders move along the direction that is close to each other simultaneously, make the slider keep sliding with the vertical pole and be connected.

Optionally, the circumferential side of the limiting ring is circumferentially provided with protruding teeth in an array manner, the scraping rod is fixedly provided with a metal shifting piece, and when the brush cylinder is close to the scraping rod, the protruding teeth interfere with the metal shifting piece.

Through adopting above-mentioned technical scheme, when the brush section of thick bamboo rolled along the wall, the action force between brush section of thick bamboo and the wall was undulant, when the action force between brush section of thick bamboo and the wall forces the brush section of thick bamboo to be close to and scrapes the pole, interference appears in dogtooth and metal plectrum, in case the dogtooth rotates along with the brush section of thick bamboo, the undulant metal plectrum of dogtooth sends the bullet and dials the sound, reminds staff control dynamics, and the dynamics of the guarantee applying paint with a brush is even to the reduction scrapes the pole and scrapes the condition that the coating drippage appears in the brush hair.

In summary, the present application includes at least one of the following beneficial technical effects:

the brush cylinder of the roller coating tool is immersed in the liquid coating, so that the brush cylinder is dipped with the coating, and when the roller coating tool is lifted upwards, the brush cylinder rotates relative to the mounting frame due to the overweight characteristic of the cylinder core of the brush cylinder, so that the scraping rod scrapes the bristles, and the excessive coating adsorbed on the bristles is scraped, so that the condition that the coating on the bristles is dripped is reduced, and the working efficiency is improved;

two ends of the second through hole are plugged by the two end sockets to form a sealed cavity, the second through hole and the first through hole are respectively positioned on the opposite sides of the through holes, the eccentric weight effect of the cylinder core is favorably improved, the weight of the cylinder core can be reduced, and the influence of the counterweight on the weight of the roller coating tool is weakened.

Drawings

Fig. 1 is a flowchart of the interior wall painting process of the present embodiment.

FIG. 2 is a schematic view showing the connection relationship between the adhesive tape and the stain-proofing tape according to the present embodiment.

Fig. 3 is a schematic structural view of the roll coating tool of the present embodiment.

Fig. 4 is a partial enlarged view at a in fig. 3.

FIG. 5 is a sectional view showing a structure of a brush cartridge according to the present embodiment.

Fig. 6 is an exploded view of the present embodiment showing the connection relationship of the mounting frame with the brush cylinder and the wiper rod, respectively.

Fig. 7 is a partial enlarged view at B in fig. 6.

Description of reference numerals: 1. a roll-coating tool; 11. a handle; 12. a mounting frame; 121. a cross bar; 122. a longitudinal bar; 1221. a limiting bulge; 123. a threaded sleeve; 13. a brush cylinder; 131. a barrel core; 1311. a first through hole; 1312. a threaded hole; 1313. a second through hole; 132. brushing; 133. a rotating shaft; 134. a counterweight; 135. a plug; 136. sealing the end; 14. a scraping rod; 141. a threaded portion; 15. a first slider; 151. a first chute; 16. a second slider; 161. a second chute; 17. a rebound assembly; 171. a first magnet; 172. a second magnet; 173. a bolt; 174. an arc-shaped notch; 18. a limiting ring; 181. a convex tooth; 182. tightening the screw; 19. a metal plectrum; 2. a stain-resistant tape; 3. an adhesive tape.

Detailed Description

The present application is described in further detail below with reference to figures 1-7.

The embodiment of the application discloses an inner wall painting process. Referring to fig. 1 and 2, the interior wall painting process includes the steps of:

step S1: inner wall cleaning preparation work:

step S11: polishing the base layer of the inner wall by using abrasive paper or an electric polishing tool, cleaning burrs on the surface of the base layer of the inner wall, and filling the local pit parts of the base layer with gypsum putty;

step S12: adhering antifouling belts 2 to a window frame and a door frame which are embedded in an inner wall, wherein the antifouling belts 2 can be made of strip-shaped plastic films, coated paper or oil paper, the length direction of the antifouling belts 2 is along the extending direction of the window frame or the door frame, the antifouling belts 2 are adhered to the door frame or the window frame through two ends, then adhering adhesive tapes 3 to the surfaces of the antifouling belts 2 in a partially overlapping manner, and one side parts, close to a base layer, of the adhesive tapes 3 are exposed out of the antifouling belts 2 and are adhered to the window frame or the door frame;

step S2: preparing an interface agent: mixing the interfacial agent with water and stirring;

step S3: coating a layer of interface agent on the surface of the base layer by using a roller coating tool 1;

step S4: drying in the air: drying for about 12 hours after finishing coating the interface agent;

step S5: maintenance and finished product protection: enhancing ventilation, naturally curing, and sealing the surface of the substrate after the interfacial agent is dried;

step S6: after the interface agent is dried in the air, coating finish paint by using a roller coating tool 1, wherein the coating times of the finish paint are determined according to the design and engineering quality requirements, and the finish paint is usually twice; the curing period is within 7 days after the coating is applied, and the paint film strength does not meet the final requirement, so that any contact between the paint film and a hard object or scrubbing is avoided.

Before the interior wall is applied paint with a brush, utilize antifouling area 2 and sticky tape 3 to cover the surface of window frame or door frame, the reducible condition of brushing a section of thick bamboo 13 pollution door frame or window frame, tear antifouling area 2 and sticky tape 3 after the work of brushing is accomplished, because sticky tape 3 is less with the effective face of pasting of window frame or door frame, the remaining probability of sticky material when reducible sticky tape 3 tears to reduce the condition of the remaining sticky material adhesion dust of sticky tape 3.

Referring to fig. 3, 4 and 5, the roll coating tool 1 includes a handle 11, a mounting frame 12 and a brush barrel 13, the mounting frame 12 includes a cross rod 121 and two longitudinal rods 122, the two longitudinal rods 122 are respectively and vertically fixed at two ends of the cross rod 121, a threaded sleeve 123 is vertically and fixedly arranged at the middle part of the cross rod 121, and one end of the handle 11 is in threaded connection with the threaded sleeve 123; the brush cylinder 13 includes a cylinder core 131 and bristles 132 covering the outer circumferential surface of the cylinder core 131, two ends of the cylinder core 131 are respectively provided with a rotating shaft 133 in a protruding manner, and the cylinder core 131 is rotatably connected with the mounting frame 12 through the two rotating shafts 133.

Referring to fig. 4 and 5, a weight 134 is arranged in the barrel core 131 in a penetrating manner, the weight 134 is in a cylindrical structure, the material of the weight 134 may be a metal with a relatively high density, such as copper or lead, etc., the barrel core 131 is provided with a first through hole 1311 adapted to the weight 134, both ends of the first through hole 1311 are respectively provided with a threaded hole 1312, and both ends of the barrel core 131 are respectively in threaded connection with plugs 135 through the threaded holes 1312; the cylinder core 131 is provided with a second through hole 1313, the second through hole 1313 and the first through hole 1311 are parallel to the axis of the cylinder core 131 and symmetrical along the axis of the cylinder core 131, the two ends of the second through hole 1313 are respectively provided with a sealing head 136, the outer circumferential surface of the sealing head 136 is attached to the inner circumferential surface of the through hole, the sealing head 136 seals the two ends of the through hole to form a cavity, the mounting frame 12 is provided with a scraping rod 14 for scraping the bristles 132, the scraping rod 14 is parallel to the axis of the cylinder core 131, the scraping rod 14 is located between the two longitudinal rods 122, and the scraping rod 14 is located between the brush cylinder 13 and the cross rod 121.

After the brush barrel 13 of the roller coating tool 1 is dipped with the liquid paint downwards and leaves the liquid level of the paint, the brush barrel 13 is gradually lifted upwards, the brush barrel 13 rotates relative to the mounting frame 12 due to the fact that the barrel core 131 is heavier, so that the brush bristles 132 dipped with the paint scrape the scraping rod 14, and the scraping rod 14 scrapes the paint in the brush barrel 13 excessively to reduce the dripping of the paint.

Referring to fig. 4 and 6, the two longitudinal bars 122 are respectively connected with first sliding blocks 15 in a sliding manner along the length direction thereof, the rotating shafts 133 at the two ends of the cylinder core 131 are respectively connected with the two first sliding blocks 15 in a rotating manner, a limiting protrusion 1221 for preventing the first sliding block 15 from being separated from the longitudinal bars 122 is arranged at one end of the longitudinal bar 122 away from the transverse bar 121, the two first sliding blocks 15 are both positioned between the two longitudinal bars 122, first sliding grooves 151 matched with the longitudinal bars 122 are respectively arranged at one sides of the two first sliding blocks 15 away from each other, and the longitudinal bars 122 are provided with springback assemblies 17 for forcing the first sliding blocks 15 to be away from the transverse bar 121; the rebound assembly 17 includes a first magnet 171 and a second magnet 172, the first magnet 171 is connected with the vertical rod 122 through a bolt 173, the second magnet 172 is connected with the corresponding first slider 15 through a bolt 173, a magnetic repulsive force is provided between the first magnet 171 and the second magnet 172, and the repulsive force between the first magnet 171 and the second magnet 172 forces the first slider 15 to abut against the limit projection 1221.

Referring to fig. 3 and 4, the two longitudinal bars 122 are connected with the second sliding blocks 16 in a sliding manner along the length direction of the two longitudinal bars, the two second sliding blocks 16 are located between the two longitudinal bars 122, the second sliding grooves 161 adapted to the longitudinal bars 122 are respectively arranged on the sides, away from the two second sliding blocks 16, of the two ends of the scraping bar 14, the thread directions of the thread parts 141 located at the two ends of the scraping bar 14 are opposite, the two ends of the scraping bar 14 are fixedly connected with the two sliding blocks, friction damping is provided between the second sliding blocks 16 and the longitudinal bars 122, and the two ends of the scraping bar 14 are respectively connected with the two second sliding blocks 16 in a threaded manner.

Before the roller coating tool 1 is used for coating the inner wall, the brush cylinder 13 can be pressed on a container containing the coating, the brush cylinder 13 is enabled to overcome the magnetic repulsion between the first magnet 171 and the second magnet 172 to be close to the cross rod 121, meanwhile, the brush cylinder 13 drives the scraping rod 14 to move towards the direction close to the cross rod 121, a certain distance is formed between the brush cylinder 13 and the scraping rod 14, and the condition that the coating drops due to the fact that the scraping rod 14 scrapes bristles 132 of the brush cylinder 13 in the coating operation is reduced; when the scraping rod 14 needs to be reset, the edge of the paint container can be used for poking the second slide block 16 to drive the scraping rod 14 to reset.

Referring to fig. 4 and 6, the rotating shaft 133 is sleeved with a limiting ring 18, an end surface of the limiting ring 18 abuts against the first sliding block 15, a set screw 182 radially penetrates through the limiting ring 18, the set screw 182 penetrates through an inner circumferential surface of the limiting ring 18 to be in threaded connection with the rotating shaft 133, convex teeth 181 are arranged on the circumference of the outer circumferential side of the limiting ring 18 in an array manner, and the scraping rod 14 is fixedly provided with a metal shifting piece 19. When the acting force between the brush barrel 13 and the wall surface fluctuates in the brushing process and the brush barrel 13 is close to the scraping rod 14 under the reaction force of the wall surface, the convex teeth 181 interfere with the metal shifting piece 19, and once the convex teeth 181 rotate along with the brush barrel 13, the metal shifting piece 19 is shifted to give a flicking sound so as to remind a worker to control the brushing force.

Specifically, neodymium iron boron magnets can be used for the first magnet 171 and the second magnet 172, but because neodymium iron boron material is hard and brittle and is difficult to open holes, the following arrangement is made to facilitate the connection between the first magnet 171 and the second magnet 172 (see fig. 7): the first magnet 171 and the second magnet 172 are of a square structure, each first magnet 171 or second magnet 172 corresponds to two bolts 173, two opposite sides of each of the first magnet 171 and the second magnet 172 are provided with arc-shaped notches 174 for avoiding the bolts 173, when the bolts 173 are connected to the first magnet 171 or the second magnet 172, bolt portions of the two bolts 173 clamp the first magnet 171 or the second magnet 172 together, bolt portions of the bolts 173 are inserted into the arc-shaped notches 174, and cap heads of the two bolts 173 press the first magnet 171 or the second magnet 172. The arcuate notch 174 is easier to machine than conventional hole configurations and reduces the occurrence of thin wall structures in the material.

The implementation principle of the inner wall painting process in the embodiment of the application is as follows: in the process of painting the inner wall by the roller painting tool 1, the brush barrel 13 is immersed in the liquid coating, so that the brush barrel 13 is fully dipped with the coating, and in the process of gradually lifting the brush barrel 13 of the roller painting tool 1 upwards, because the barrel core 131 of the brush barrel 13 has the overweight characteristic, the brush barrel 13 rotates relative to the mounting frame 12, so that the scraping rod 14 scrapes and sweeps the excessive coating adsorbed on the bristles 132, the condition that the coating on the bristles 132 is dripped is reduced, the time for a worker to wait for the dripping of the coating on the bristles 132 is shortened, and the work efficiency is improved; moreover, after the excessive paint on the brush hair 132 is reduced, the amount of the paint locally attached when the brush barrel 13 initially contacts the wall surface can be reduced, so that the workload of repeatedly rolling and brushing the excessive paint uniformly can be reduced, and the brushing work efficiency can be improved.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.