Sofa fabric imitation cowhide velvet treatment device

By introducing agitating components and thrashing components into the sofa fabric treatment device, the problems of antibacterial liquid layering and poor absorption of imitation cowhide fabrics are solved, achieving a more uniform antibacterial effect and higher production efficiency.

CN223033660UActive Publication Date: 2025-06-27ZHEJIANG MULUN TEXTILE TECH CO LTD
View PDF 0 Cites 0 Cited by

Patent Information

Application Number
CN202421952126.4
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-08-13
Publication Date
2025-06-27
Estimated Expiration
2034-08-13

AI Technical Summary

Technical Problem

After long-term use of the existing antibacterial treatment device, the antibacterial liquid is prone to delamination, resulting in uneven concentrations of the antibacterial liquid in the storage compartment, affecting the antibacterial effect of the fabric, and the antibacterial treatment effect of the imitation cowhide fabric is poor.

Method used

A sofa fabric imitation cowhide velvet treatment device is designed, including a mixing assembly and a thrash assembly. The stirring assembly drives the rotating shaft and the stirring frame through the first motor to prevent the layering of the antibacterial liquid; the beater assembly drives the drive shaft and the rotating rod through the second motor to drive the installation plate and the lower beater plate to repeatedly beat, improving the absorption effect of the antibacterial liquid.

Benefits of technology

By stirring the components, the antibacterial liquid remains in a flow state, avoiding layering, and ensuring uniform concentration; by thrashing the components, the imitation cowhide fabric absorbs the antibacterial liquid better and faster, improving its antibacterial effect and improving production efficiency.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN223033660U_ABST
    Figure CN223033660U_ABST
Patent Text Reader

Abstract

The utility model discloses a sofa fabric imitation cowhide velvet treatment device, and relates to the technical field of imitation cowhide velvet fabric treatment. A feeding groove is formed in one end of the box body, a discharging groove is formed in the other end of the box body, a plurality of guide rollers are installed in an inner cavity of the box body, a stirring assembly is installed on the box body, a beating assembly is installed at the lower end of the inner cavity of the box body, a driving assembly is installed at one end of the beating assembly, and installation windows are formed in the two ends of the upper surface of the box body. The stirring assembly can stir antibacterial liquid in the box body, so that the antibacterial liquid is in a flowing state all the time, and the situation that the antibacterial liquid is layered after being placed for a long time, the concentration of the upper portion and the concentration of the lower portion are different, and the antibacterial effect of the imitated cow leather velvet fabric is affected is avoided, the imitated cow leather velvet fabric can be repeatedly beaten through the beating assembly, and the antibacterial effect of the imitated cow leather velvet fabric is improved. Therefore, the antibacterial liquid can be better and more quickly absorbed, the antibacterial effect of the antibacterial liquid is improved, and the production efficiency is improved.
Need to check novelty before this filing date? Find Prior Art

Description

Technical Field

[0001] The utility model belongs to the technical field of imitation cowhide velvet fabric treatment, and specifically relates to a device for treating imitation cowhide velvet of sofa fabric. Background Technique

[0002] Sofa is a foreign word, transliterated from the English word "sofa", which is a multi-seat chair with soft cushions, a back chair equipped with springs or thick foam plastics, and armrests on both sides. It is a kind of soft furniture. The origin of the sofa can be traced back to ancient Egypt around 2000 BC, but the real soft-packed sofa appeared in the late 16th century to the early 17th century. With the continuous development of modern society, the forms and fabrics of sofas have become various, including imitation cowhide velvet fabric. The advantage of imitation cowhide velvet fabric sofas is that they have a texture comparable to real cowhide, low price, easy to clean and maintain, and have diverse colors and textures, which are the sofa fabrics with more choices now.

[0003] Since sofa fabrics are generally not easy to disassemble and clean, a large number of bacteria will grow on the surface after long-term use, and it is troublesome to sterilize. Generally, an antibacterial treatment device is used during production to immerse antibacterial liquid into the fabric interior to improve its antibacterial effect. However, in the existing antibacterial treatment device, the antibacterial liquid in the storage bin will stratify during long-term placement, resulting in uneven upper and lower concentrations of the antibacterial liquid in the storage bin, which easily leads to poor antibacterial treatment effect of the fabric. Moreover, in the antibacterial treatment of its imitation cowhide velvet fabric, if it is simply immersed in antibacterial liquid, the absorption effect of the fabric will be poor, affecting its antibacterial effect.

[0004] For the problems in the related technology, no effective solution has been proposed yet. Content of the Utility Model

[0005] For the problems in the related technology, the utility model provides a device for treating imitation cowhide velvet of sofa fabric to overcome the above-mentioned technical problems existing in the existing related technology.

[0006] To solve the above technical problems, the utility model is realized through the following technical solutions:

[0007] The utility model is a device for treating imitation cowhide velvet of sofa fabric, including a box body. One end of the box body is provided with a feeding slot, the other end of the box body is provided with a discharging slot. A plurality of guiding rollers are installed in the inner cavity of the box body. A stirring component is installed on the box body. A hammering component is installed at the lower end of the inner cavity of the box body. One end of the hammering component is installed with a driving component. Installation windows are respectively opened at both ends of the upper surface of the box body.

[0008] The feeding trough is used to convey the artificial leather velvet fabric into the box body. The installation window is used to install the artificial leather velvet fabric on the guiding roller and the beating assembly. The guiding roller is used to guide the passing route of the artificial leather velvet fabric inside the box body. The stirring assembly can stir the antibacterial liquid in the box body to prevent it from stratifying. The driving assembly can drive the beating assembly to move reciprocally so that the artificial leather velvet can better absorb the antibacterial liquid.

[0009] Further, the stirring assembly includes a first motor installed on the upper surface of the box body. A rotating shaft is installed on the axis of the first motor. The lower end of the rotating shaft penetrates the box body and enters its interior. A stirring frame is sleeved on the lower end of the rotating shaft.

[0010] Further, the beating assembly includes an upper beating plate with both ends installed on the inner wall of the box body. The beating assembly also includes fixing plates, and the number of the fixing plates is two. The two fixing plates are respectively installed on one side of the inner wall of the box body. Positioning blocks are installed on the fixing plates. Installation plates are installed on the corresponding sides of the fixing plates. Positioning grooves are formed in the installation plates. The positioning blocks can be slidably matched with the positioning grooves. A lower beating plate is installed at the upper end of the installation plate, and the lower beating plate corresponds to the upper beating plate up and down.

[0011] Further, the driving assembly includes a second motor installed on one side of the box body. A circular notch is formed in one of the fixing plates. A driving groove is formed at the lower end of the installation plate on the same side as the fixing plate. A driving shaft is installed on the axis of the second motor. One end of the driving shaft penetrates the box body and extends into the circular notch with the fixing block, and is located at the axis position of the circular notch. A rotating rod is installed at one end of the driving shaft, and the length of the rotating rod is equal to the radius of the circular notch. A driving column is installed at one end of the rotating rod, and the driving column can be slidably matched with the driving groove.

[0012] Further, a water outlet pipe communicating with the inside is installed on one side of the box body, and a valve is installed on the water outlet pipe.

[0013] Further, covers are rotatably installed on the installation windows. The covers can completely cover the installation windows, and handles are installed on the covers.

[0014] The utility model has the following beneficial effects:

[0015] 1. The utility model can stir the antibacterial liquid inside its box body through the stirring component, keeping it in a flowing state all the time, avoiding stratification due to long-term placement, resulting in different upper and lower concentrations, which affects the antibacterial effect of its artificial leather velvet fabric. Through the hammering component, the artificial leather velvet fabric can be repeatedly hammered, enabling it to better and more quickly absorb the antibacterial liquid, improving its own antibacterial effect and production efficiency.

[0016] 2. The utility model passes the artificial leather velvet fabric under the lower surface of its hammering plate. The second motor drives its drive shaft to drive its rotating rod to rotate in its circular notch, thereby driving the drive column installed at one end of the rotating rod to slide in its drive groove, and then driving its mounting plate to move up and down reciprocally on its fixing plate, enabling its lower hammering plate to repeatedly hammer the artificial leather velvet fabric, making the antibacterial liquid better penetrate into its interior, and the artificial leather velvet fabric can more quickly absorb the antibacterial liquid. Furthermore, the antibacterial treatment effect of the artificial leather velvet fabric by this device can be improved, the production efficiency can be increased, and the antibacterial effect of the artificial leather velvet fabric can be ensured.

[0017] Of course, it is not necessary for any product implementing the utility model to achieve all the above-mentioned advantages simultaneously. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0019] Figure 1 It is a three-dimensional structure schematic diagram of the utility model;

[0020] Figure 2 It is the second three-dimensional structure schematic diagram of the utility model;

[0021] Figure 3 It is a three-dimensional sectional structure schematic diagram of the utility model;

[0022] Figure 4 It is a structure schematic diagram of the stirring component of the utility model;

[0023] Figure 5 It is a structure schematic diagram of the hammering component of the utility model;

[0024] Figure 6 It is of the utility model Figure 5 Partial enlarged structure schematic diagram at A in;

[0025] Figure 7 It is a structure schematic diagram of the drive component of the utility model.

[0026] In the accompanying drawings, the list of components represented by each reference numeral is as follows:

[0027] 1. Box body; 2. Feeding trough; 3. Discharging trough; 4. Guide roller; 5. Stirring assembly; 6. Hammering assembly; 7. Driving assembly; 8. Installation window; 9. First motor; 10. Rotating shaft; 11. Stirring frame; 12. Upper hammering plate; 13. Fixed plate; 14. Positioning block; 15. Mounting plate; 16. Positioning groove; 17. Lower hammering plate; 18. Second motor; 19. Circular notch; 20. Driving groove; 21. Driving shaft; 22. Rotating rod; 23. Driving column; 24. Water outlet pipe; 25. Valve; 26. Cover plate; 27. Handle. Detailed implementation manners

[0028] Next, the technical solutions in the embodiments of the utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the utility model. Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the utility model without making creative efforts belong to the scope of protection of the utility model.

[0029] In the description of the present utility model, it should be understood that the terms "open hole", "upper", "lower", "top", "middle", "inner", etc. indicating the orientation or position relationship are only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the utility model.

[0030] Please refer to Figures 1-7 As shown, the present utility model is a device for processing imitation cowhide velvet of sofa fabric, including a box body 1. One end of the box body 1 is provided with a feeding trough 2, the other end of the box body 1 is provided with a discharging trough 3, a plurality of guide rollers 4 are installed in the inner cavity of the box body 1, a stirring assembly 5 is installed on the box body 1, a hammering assembly 6 is installed at the lower end of the inner cavity of the box body 1, a driving assembly 7 is installed at one end of the hammering assembly 6, and installation windows 8 are respectively opened at both ends of the upper surface of the box body 1;

[0031] The feeding trough 2 is used to convey the imitation cowhide velvet fabric into the box body 1. The installation window 8 is used to install the imitation cowhide velvet fabric on the guide rollers 4 and the hammering assembly 6. The guide rollers 4 are used to guide the passing route of the imitation cowhide velvet fabric inside the box body 1. The stirring assembly 5 can stir the antibacterial liquid in the box body 1 to prevent it from stratifying. The driving assembly 7 can drive the hammering assembly 6 to perform reciprocating motion so that the imitation cowhide velvet can better absorb the antibacterial liquid.

[0032] In actual use, the artificial leather suede fabric is conveyed into the box body 1 through the feeding chute 2, and then gradually installed on the guiding roller 4 and the beating assembly 6 through the installation window 8. Subsequently, the antibacterial liquid is poured into the box body 1 through the installation window 8, and the stirring assembly 5 can stir the antibacterial liquid, so that it is always in a flowing state and will not stratify due to long-term placement. The driving assembly 7 can drive the beating assembly 6 to move up and down reciprocally, so as to beat the artificial leather suede fabric passing through it, enabling the antibacterial liquid to better enter the interior of the artificial leather suede fabric and be absorbed by it, improving the antibacterial treatment effect. Subsequently, it is conveyed to the next process through the discharge chute 3.

[0033] The utility model can stir the antibacterial liquid inside the box body 1 through the stirring assembly 5, making it always in a flowing state, avoiding stratification due to long-term placement, resulting in different upper and lower concentrations and affecting the antibacterial effect of the artificial leather suede fabric. The beating assembly 6 can repeatedly beat the artificial leather suede fabric, enabling it to better and more quickly absorb the antibacterial liquid, improving its own antibacterial effect and production efficiency.

[0034] In one embodiment, for the above-mentioned stirring assembly 5, the stirring assembly 5 includes a first motor 9, the first motor 9 is installed on the upper surface of the box body 1, a rotating shaft 10 is installed at the axis of the first motor 9, the lower end of the rotating shaft 10 penetrates the box body 1 and enters its interior, and a stirring frame 11 is sleeved on the lower end of the rotating shaft 10.

[0035] By driving the first motor 9, the stirring frame 11 is driven to rotate through the rotating shaft 10, so as to stir the antibacterial liquid inside the box body 1, making it always in a flowing state, avoiding stratification due to long-term placement, resulting in different upper and lower concentrations and affecting the antibacterial treatment effect.

[0036] In one embodiment, for the above-mentioned beating assembly 6, the beating assembly 6 includes an upper beating plate 12, both ends of the upper beating plate 12 are installed on the inner wall of the box body 1. The beating assembly 6 further includes fixing plates 13, the number of the fixing plates 13 is two, the two fixing plates 13 are respectively installed on one side of the inner wall of the box body 1, positioning blocks 14 are installed on the fixing plates 13, mounting plates 15 are installed on the corresponding sides of the fixing plates 13, positioning grooves 16 are formed on the mounting plates 15, the positioning blocks 14 can be slidably matched with the positioning grooves 16, and a lower beating plate 17 is installed at the upper end of the mounting plate 15, and the lower beating plate 17 corresponds to the upper beating plate 12 up and down.

[0037] By passing the artificial leather velvet fabric under the lower surface of the beating plate 12, through the sliding fit of the positioning groove 16 and the positioning block 14, the driving component 7 can drive the mounting plate 15 to move up and down reciprocally on the fixed plate 13, so that the lower beating plate 17 can repeatedly beat the artificial leather velvet fabric, enabling the antibacterial liquid to better penetrate into it, and the artificial leather velvet fabric can more quickly absorb the antibacterial liquid, thereby achieving the effect that this device can improve the antibacterial treatment of the artificial leather velvet fabric, improve production efficiency, and ensure the antibacterial effect of the artificial leather velvet fabric.

[0038] In one embodiment, for the above-mentioned driving component 7, the driving component 7 includes a second motor 18, the second motor 18 is installed on one side of the box body 1, a circular notch 19 is opened on one side of the fixed plate 13, a driving groove 20 is opened at the lower end of the mounting plate 15 on the same side as the fixed plate 13, a driving shaft 21 is installed at the axis of the second motor 18, one end of the driving shaft 21 penetrates through the box body 1 and the fixed block and extends into the circular notch 19, and at the axis position of the circular notch 19, a rotating rod 22 is installed at one end of the driving shaft 21, the length of the rotating rod 22 is equal to the radius of the circular notch 19, a driving column 23 is installed at one end of the rotating rod 22, and the driving column 23 can be in sliding fit with the driving groove 20.

[0039] Drive the second motor 18, so that the driving shaft 21 drives the rotating rod 22 to rotate in the circular notch 19, thereby driving the driving column 23 installed at one end of the rotating rod 22 to slide in the driving groove 20, and further driving the mounting plate 15 to move up and down reciprocally on the fixed plate 13, so that the lower beating plate 17 can repeatedly beat the passing artificial leather velvet fabric.

[0040] In one embodiment, for the above-mentioned box body 1, a water outlet pipe 24 communicating with its interior is installed on one side of the box body 1, and a valve 25 is installed on the water outlet pipe 24.

[0041] When it is necessary to discharge the antibacterial liquid inside the box body 1 to the outside, the valve 25 on the water outlet pipe 24 can be opened, so that the antibacterial liquid can be discharged to the outside through the water outlet pipe 24, improving the practicality.

[0042] In one embodiment, for the above-mentioned installation window 8, a cover plate 26 is rotatably installed on each of the installation windows 8, the cover plate 26 can completely cover the installation window 8, and a handle 27 is installed on each of the cover plates 26.

[0043] The cover plate 26 can be opened by pulling the handle 27 so that it no longer covers the installation window 8, enabling the imitation cowhide velvet fabric to be installed on its guiding roller 4 through the installation window 8 and pass under the lower surface of the upper beating plate 12, and also enabling the antibacterial liquid to be poured into the box body 1 through the installation window 8. During use, the cover plate 26 can also completely cover the installation window 8 to prevent the antibacterial liquid from spilling out and avoid waste.

[0044] In summary, by means of the above technical solution of the present utility model, the cover plate 26 can be opened by pulling the handle 27 so that it no longer covers the installation window 8, enabling the imitation cowhide velvet fabric to be installed on its guiding roller 4 through the installation window 8 and pass under the lower surface of the upper beating plate 12, and also enabling the antibacterial liquid to be poured into the box body 1 through the installation window 8. During use, the cover plate 26 can also completely cover the installation window 8 to prevent the antibacterial liquid from spilling out and avoid waste. Then, by driving the first motor 9, the stirring frame 11 is driven to rotate through the rotating shaft 10, thereby stirring the antibacterial liquid inside the box body 1 to keep it in a flowing state, preventing it from stratifying after being placed for too long, resulting in different concentrations at the top and bottom and affecting the antibacterial treatment effect. By driving the second motor 18, the driving shaft 21 drives the rotating rod 22 to rotate in its circular notch 19, thereby driving the driving column 23 installed at one end of the rotating rod 22 to slide in its driving groove 20. Through the sliding cooperation of the positioning groove 16 and the positioning block 14, the mounting plate 15 can be driven to move up and down reciprocally on its fixed plate 13, so that the lower beating plate 17 can repeatedly beat the imitation cowhide velvet fabric, enabling the antibacterial liquid to better penetrate into it and the imitation cowhide velvet fabric to more quickly absorb the antibacterial liquid. Furthermore, the antibacterial treatment effect of the imitation cowhide velvet fabric can be improved by this device, the production efficiency can be increased, and the antibacterial effect of the imitation cowhide velvet fabric can be ensured. The imitation cowhide velvet fabric that has undergone antibacterial treatment is output to the outside through the discharge chute 3 for the next process. And when it is necessary to discharge the antibacterial liquid inside the box body 1 to the outside, the valve 25 on the water outlet pipe 24 can be opened, and the antibacterial liquid can be discharged to the outside through the water outlet pipe 24, improving the practicality.

[0045] Through the above technical solutions: 1. The stirring component 5 can stir the antibacterial liquid inside the box body 1 to keep it in a flowing state, preventing stratification due to long-term placement, which may lead to different concentrations at the top and bottom and affect the antibacterial effect of the artificial leather velvet fabric. The beating component 6 can repeatedly beat the artificial leather velvet fabric, enabling it to absorb the antibacterial liquid better and more quickly, improving its own antibacterial effect and production efficiency. 2. By passing the artificial leather velvet fabric under the lower surface of the beating plate 12, the second motor 18 drives its drive shaft 21 to drive the rotating rod 22 to rotate within the circular notch 19, thereby driving the drive column 23 installed at one end of the rotating rod 22 to slide within the drive groove 20, and then driving the mounting plate 15 to move up and down reciprocally on the fixing plate 13, so that the lower beating plate 17 can repeatedly beat the artificial leather velvet fabric, enabling the antibacterial liquid to better penetrate into its interior and the artificial leather velvet fabric to absorb the antibacterial liquid more quickly. Thus, the antibacterial treatment effect of the artificial leather velvet fabric by this device can be improved, the production efficiency can be increased, and the antibacterial effect of the artificial leather velvet fabric can be ensured.

[0046] In the description of this specification, the descriptions referring to terms such as "one embodiment", "example", "specific example", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0047] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to the specific embodiments described. Obviously, many modifications and variations can be made according to the content of this specification. This specification selects and specifically describes these embodiments to better explain the principle and practical application of the utility model, so that those skilled in the relevant technical field can well understand and utilize the utility model. The utility model is only limited by the claims and their full scope and equivalents.

Claims

1. A device for treating sofa fabric with imitation cowhide, comprising a box (1), characterized in that: A feed trough (2) is provided at one end of the box body (1), a discharge trough (3) is provided at the other end of the box body (1), a plurality of guide rollers (4) are installed in the inner cavity of the box body (1), a stirring assembly (5) is installed on the box body (1), a beating assembly (6) is installed at the lower end of the inner cavity of the box body (1), a driving assembly (7) is installed at one end of the beating assembly (6), and installation windows (8) are provided at both ends of the upper surface of the box body (1); The feed trough (2) is used to convey the imitation cowhide fabric into the box (1); the installation window (8) is used to install the imitation cowhide fabric on the guide roller (4) and the beating assembly (6); the guide roller (4) is used to guide the imitation cowhide fabric to pass through the box (1); the stirring assembly (5) can stir the antibacterial liquid in the box (1) so that it will not be stratified; the driving assembly (7) can drive the beating assembly (6) to reciprocate so that the imitation cowhide can better absorb the antibacterial liquid.

2. The imitation cowhide velvet processing device for sofa fabric according to claim 1 is characterized in that: The stirring assembly (5) comprises a first motor (9), the first motor (9) being mounted on the upper surface of the housing (1), a rotating shaft (10) being mounted on the axis of the first motor (9), the lower end of the rotating shaft (10) passing through the housing (1) and entering the interior thereof, and a stirring frame (11) being mounted on the lower end of the rotating shaft (10).

3. The imitation cowhide velvet processing device for sofa fabric according to claim 2 is characterized in that: The beating assembly (6) comprises an upper beating plate (12), both ends of which are mounted on the inner wall of the box body (1). The beating assembly (6) further comprises a fixing plate (13), two fixing plates (13) are provided, and the two fixing plates (13) are respectively mounted on one side of the inner wall of the box body (1). A positioning block (14) is mounted on each of the fixing plates (13). A mounting plate (15) is mounted on each of the corresponding sides of the fixing plates (13). A positioning groove (16) is formed on the mounting plate (15), and the positioning block (14) can be slidably matched with the positioning groove (16). A lower beating plate (17) is mounted on the upper end of the mounting plate (15), and the lower beating plate (17) corresponds to the upper beating plate (12) in the upper and lower directions.

4. The imitation cowhide velvet processing device for sofa fabric according to claim 3 is characterized in that: The driving assembly (7) comprises a second motor (18), the second motor (18) being mounted on one side of the housing (1), a circular notch (19) being provided on the fixing plate (13) on one side, a driving groove (20) being provided at the lower end of the mounting plate (15) on the same side as the fixing plate (13), a driving shaft (21) being mounted on the axis of the second motor (18), one end of the driving shaft (21) penetrating the housing (1) and the fixing plate (13) and extending into the circular notch (19), and a rotating rod (22) being mounted on one end of the driving shaft (21) at the axis position of the circular notch (19), the length of the rotating rod (22) being equal to the radius of the circular notch (19), and a driving column (23) being mounted on one end of the rotating rod (22), the driving column (23) being capable of slidingly cooperating with the driving groove (20).

5. The imitation cowhide velvet processing device for sofa fabric according to claim 4 is characterized in that: A water outlet pipe (24) communicating with the interior of the box (1) is installed on one side of the box body (1), and a valve (25) is installed on the water outlet pipe (24).

6. The imitation cowhide velvet processing device for sofa fabric according to claim 5, characterized in that: A cover plate (26) is rotatably mounted on each of the installation windows (8); the cover plate (26) can completely cover the installation window (8); and a handle (27) is mounted on each of the cover plates (26).