Cloth cutting machine for trouser production

Abstract

The utility model belongs to the technical field of trouser production equipment, and particularly relates to a cloth cutting machine for trouser production, which comprises an operation table, support frames are symmetrically fixed on the left side of the upper surface of the operation table, and cloth placing rollers are rotatably mounted at the top ends of the two support frames. A wrinkle removing mechanism used for leveling cloth is arranged on the upper surface of the operation table and located on the right sides of the two supporting frames, a through groove is formed in the position, located in the middle, of the upper surface of the operation table, and a sliding rail is arranged on the position, located over the through groove, of the upper surface of the operation table; a cloth cutter which is fixedly mounted on the side wall of the operation table is arranged on the peripheral side of the sliding rail; by arranging the dust collecting mechanism, fiber chippings and part of dust generated in the cloth breaking process can be effectively collected, the cleanliness of the table top of the operation table is guaranteed, the adverse effect on cloth raw materials is reduced, the low efficiency caused by manual cleaning is reduced, and the overall working efficiency is greatly improved.

Description

Technical Field

[0001] This utility model belongs to the technical field of trouser production equipment, and in particular relates to a fabric cutting machine for trouser production. Background Technology

[0002] A fabric cutting machine is a machine used to cut fabric. In the clothing industry, in order to improve the efficiency of fabric use, people need to use fabric cutting machines to cut the fabric to meet people's needs and improve efficiency. In the production of trousers, fabric cutting machines are needed to cut the trouser fabric.

[0003] For example, Chinese patent CN221501572U discloses a fabric cutting machine for trouser production, including an operating table. A support frame is installed at the top rear end of the operating table, and a fabric feeding roller is installed on the support frame. A slide rail is horizontally embedded in the top of the operating table, and a fabric cutter is slidably installed on the slide rail. The machine also includes a fabric spreading mechanism. A fixed frame is fixedly connected between the slide rail and the support frame on the operating table. The fabric spreading mechanism is installed on the fixed frame and is used to spread the trouser fabric flat. This invention uses a fabric spreading mechanism to drive a connecting seat to descend, causing the pressure roller to contact the trouser fabric. As the driving component continues to descend, a rotating plate rotates around the connecting seat, causing the two pressure rollers to roll away from each other on the trouser fabric, thus spreading the trouser fabric flat and preventing wrinkles from affecting the fabric cutting operation.

[0004] This patent has some drawbacks in its use. For example, the fabric cutting machine in this patent lacks a corresponding waste recycling mechanism, which makes it easy for cotton lint, waste debris, and other impurities to accumulate on the slide rails, operating table, and rollers in its fabric spreading mechanism after prolonged use, thus affecting the normal operation of the equipment. Therefore, we propose a fabric cutting machine solution for trouser production. Utility Model Content

[0005] The purpose of this utility model is to provide a fabric cutting machine for trouser production, so as to solve the problems mentioned in the background art.

[0006] In view of this, the present invention provides a fabric cutting machine for trouser production, comprising:

[0007] The operating table has support frames symmetrically fixed on the left side of its upper surface. Fabric feeding rollers are rotatably installed on the top of the two support frames. A wrinkle removal mechanism for smoothing the fabric is provided on the upper surface of the operating table and to the right of the two support frames. A through groove is provided on the upper surface of the operating table at the middle position. A slide rail is provided on the upper surface of the operating table and directly above the through groove. A fabric cutter is fixedly installed on the side wall of the operating table around the slide rail.

[0008] The dust collection mechanism is located directly below the operating table and near the through slot, and is used to collect the debris and threads generated during the cutting of the feed material.

[0009] In the above technical solution, the wrinkle removal mechanism further includes:

[0010] Two support rods are symmetrically arranged and fixed to the upper surface of the operating table. A reversing roller is symmetrically rotatably installed between the two support rods. Two symmetrically arranged steering blocks are arranged between the two reversing rollers. The two steering blocks are rotatably connected to the inner wall of the corresponding support rod. A C-shaped steering clamp is symmetrically rotatably installed on the other side of the steering block.

[0011] In the above technical solution, a softening component for softening fibers is further provided on the upper surface of the operating table and at the bottom position between the two support rods. The softening component consists of a heating box, an infrared heating lamp, and a protective mesh plate. The heating box is fixedly installed on the upper surface of the operating table and at the position between the two support rods. The infrared heating lamp is fixedly installed in the inner cavity of the heating box. The protective mesh plate is fixedly installed at the top opening of the heating box by bolts.

[0012] In the above technical solution, further, the upper surface of the operating table and the right side of the wrinkle removal mechanism are symmetrically fixed with side plates, and multiple guide rollers are rotatably installed between the two side plates, with the lower surface of the guide rollers being flush with the upper surface of the slide rail.

[0013] In the above technical solution, the dust collection mechanism further includes a collection component for collecting debris and filaments and a cleaning component for cleaning the inner cavity of the collection component.

[0014] In the above technical solution, the collection component further includes:

[0015] The dust collection box has a top-opening, hollow interior structure. It is bolted to the lower surface of the operating table and located directly below the through slot. Side holes are symmetrically opened on both sides of the dust collection box. A bottom groove 1 is opened on the bottom surface of the inner cavity of the dust collection box, and a bottom groove 2 is opened on the bottom surface of the inner cavity of the bottom groove 1. Multiple evenly distributed ventilation holes are opened on the bottom surface of the bottom groove 2. A filter screen 1 is snapped into the bottom groove 1, and a filter screen 2 is snapped into the bottom groove 2. A fan is fixedly installed at the bottom of the dust collection box.

[0016] In the above technical solution, the cleaning component further includes:

[0017] A push plate is slidably installed in a side hole on the right side of the dust collection box. The lower surface of the push plate is flush with the upper surface of the filter screen. A fixing frame is provided on the right side of the push plate and fixed to the lower surface of the operating table. An electric push rod is fixedly installed in the fixing frame. The telescopic rod end of the electric push rod is fixed to the outer wall of the push plate. A collection box is provided on the left side of the dust collection box and fixed to the lower surface of the operating table. A baffle is slidably installed at the bottom opening of the collection box. The collection box and the dust collection box are connected through a side hole.

[0018] The beneficial effects of this utility model are:

[0019] 1. This fabric cutting machine for trouser production, by setting up a wrinkle removal mechanism, can smooth out the wrinkles in the fabric after it has been stretched, reducing the errors caused by wrinkles in the fabric material during cutting, and effectively improving the cutting accuracy and cutting effect of the fabric.

[0020] 2. This fabric cutting machine for trouser production softens the fabric to be cut by setting a softening component, effectively improving the fabric's flexibility and making the fibers softer. This reduces friction between fibers, making cutting smoother. Heated fabric is less prone to fraying and tearing during cutting. In addition, heated fabric is easier to cut according to design requirements, reducing errors caused by uneven fabric stiffness and effectively improving cutting accuracy.

[0021] 3. This fabric cutting machine for trouser production, by setting up a dust collection mechanism, can effectively collect fiber debris and some dust generated during the fabric cutting process, ensuring the cleanliness of the workbench surface, reducing adverse effects on the fabric raw materials, reducing the inefficiency of manual cleaning, and greatly improving overall work efficiency. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0023] Figure 2 This is a schematic diagram of the wrinkle removal mechanism and softening component in this utility model;

[0024] Figure 3 This is a schematic diagram of the through groove structure of this utility model;

[0025] Figure 4 This is a schematic diagram of the dust collection mechanism in this utility model;

[0026] Figure 5 This is a schematic diagram of the structure of the collection box in this utility model;

[0027] Figure 6 This is a schematic diagram of the structure of the collecting component in this utility model.

[0028] The markings in the diagram are as follows:

[0029] 1. Operating table; 2. Support frame; 3. Fabric feeding roller; 4. Support rod; 5. Reversing roller; 6. Steering block; 7. Steering clamp; 8. Heating box; 9. Infrared heating lamp; 10. Protective mesh plate; 11. Side plate; 12. Guide roller; 13. Through groove; 14. Slide rail; 15. Fabric cutter; 16. Dust collection box; 17. Side hole; 18. Bottom groove one; 19. Bottom groove two; 20. Filter screen one; 21. Filter screen two; 22. Fan; 23. Push plate; 24. Fixing frame; 25. Electric push rod; 26. Collection box; 27. Baffle. Detailed Implementation

[0030] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0031] In the description of this application, it should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. For ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items, and therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0032] It should be noted that the terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and are not limited in number; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character "" generally indicates that the preceding and following objects have an "or" relationship.

[0033] It should be noted that in the description of this application, the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this application. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0034] It should be noted that, in this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0035] Example 1:

[0036] Please see Figure 1 - Figure 6 As shown, this embodiment provides a fabric cutting machine for trouser production, including:

[0037] The operating table 1 has support frames 2 symmetrically fixed on the left side of its upper surface. Fabric rollers 3 are rotatably installed on the top of the two support frames 2. A wrinkle removal mechanism for flattening the fabric is provided on the upper surface of the operating table 1 and to the right of the two support frames 2. A through groove 13 is provided on the upper surface of the operating table 1 and at the middle position. A slide rail 14 is provided on the upper surface of the operating table 1 and directly above the through groove 13. A fabric cutter 15 is fixedly installed on the side wall of the operating table 1 around the slide rail 14.

[0038] The dust collection mechanism is located directly below the operating table 1 and near the through groove 13, and is used to collect the debris and threads generated during the cutting of the feed material.

[0039] In this embodiment, the wrinkle removal mechanism includes:

[0040] Two support rods 4 are symmetrically arranged and fixed to the upper surface of the operating table 1. A reversing roller 5 is symmetrically rotatably installed between the two support rods 4. Two steering blocks 6 are symmetrically arranged between the two reversing rollers 5. The two steering blocks 6 are rotatably connected to the inner wall of the support rod 4 on the corresponding side. A C-shaped steering clamp 7 is symmetrically rotatably installed on the other side of the steering block 6.

[0041] In this embodiment, the dust collection mechanism includes a collection component for collecting debris and lint, and a cleaning component for cleaning the inner cavity of the collection component.

[0042] In this application, the fabric roll is first placed on the fabric feeding roller 3. Then, the head end of the fabric roll is pulled and passed through the wrinkle removal mechanism and placed on the upper surface of the slide rail 14. Then, the fabric cutter 15 is started to cut the fabric. It is worth noting that the fabric cutter 15 is prior art. It has been described and used in the publication CN221501572U entitled "A Fabric Cutting Machine for Pants Production". The specific model and parameters of the fabric cutter 15 will not be described in detail in this application. Those skilled in the art should be familiar with them. The main purpose of this application is to recycle and process the fibers and dust generated during the fabric cutting process, so as to ensure the cleanliness of the workbench 1 during operation and reduce the adverse effects of "dirt, mess and poor" factors on the fabric raw materials and the raw materials during the cutting process. A certain area of ​​blank space is reserved on the right side of the workbench 1 so that the user can stack and further process the cut fabric.

[0043] Example 2:

[0044] This embodiment provides a fabric cutting machine for trouser production. In addition to the technical solutions of the above embodiments, it also has the following technical features: a softening component for softening fibers is provided on the upper surface of the operating table 1 at the bottom position between the two support rods 4. The softening component consists of a heating box 8, an infrared heating lamp 9, and a protective mesh plate 10. The heating box 8 is fixedly installed on the upper surface of the operating table 1 at the position between the two support rods 4. The infrared heating lamp 9 is fixedly installed in the inner cavity of the heating box 8. The protective mesh plate 10 is fixedly installed at the top opening of the heating box 8 by bolts.

[0045] When the fabric passes through the de-wrinkling mechanism, it passes directly above the heating box 8. At this time, the infrared heating lamp 9 is activated. After the infrared heating lamp 9 is powered on, it starts to work and heats up, thereby raising the air temperature directly above the heating box 8, which heats the passing fabric. After the fabric is heated, the fibers in the fabric can be softened.

[0046] By setting up a softening component, the fabric to be cut is softened, effectively improving the fabric's flexibility and making the fabric fibers softer. This reduces friction between fibers, making cutting smoother. Heated fabric is less prone to fraying and tearing during cutting. In addition, heated fabric is easier to cut according to design requirements, reducing errors caused by uneven fabric stiffness and effectively improving cutting accuracy.

[0047] Example 3:

[0048] This embodiment provides a fabric cutting machine for trouser production. In addition to the technical solution of the above embodiment, it also has the following technical features: a side plate 11 is symmetrically fixed on the upper surface of the operating table 1 and on the right side of the wrinkle removal mechanism. A plurality of guide rollers 12 are rotatably installed between the two side plates 11. The lower surface of the guide rollers 12 is flush with the upper surface of the slide rail 14.

[0049] The softened fabric is gradually brought to a horizontal position by multiple guide rollers 12 until it is smoothly conveyed to the upper surface of the slide rail 14.

[0050] By setting multiple guide rollers 12, the fabric is guided to a certain extent, reducing the inclination between the fabric and the slide rail 14 when the fabric is output from the wrinkle removal mechanism, and reducing the cutting error caused by the uneven placement of the fabric.

[0051] Example 4:

[0052] This embodiment provides a fabric cutting machine for trouser production. In addition to the technical solutions described in the above embodiments, it also has the following technical features, including a collection component:

[0053] The dust collection box 16 has a top-opening, hollow interior structure. It is bolted to the lower surface of the operating table 1 and located directly below the through groove 13. Side holes 17 are symmetrically opened on the left and right sides of the dust collection box 16. A bottom groove 18 is opened on the bottom surface of the inner cavity of the dust collection box 16. A bottom groove 29 is opened on the bottom surface of the inner cavity of the bottom groove 18. Multiple evenly distributed ventilation holes are opened on the bottom surface of the bottom groove 29. A filter screen 20 is snapped into the bottom groove 18, and a filter screen 21 is snapped into the bottom groove 29. A fan 22 is fixedly installed at the bottom of the dust collection box 16.

[0054] During collection, the fan 22 is started first. At this time, the multiple blades in the fan 22 rotate and generate a certain negative pressure, so that the fiber ends and dust at the upper cutting point can enter the inner cavity of the dust collection box 16 below through the channel 13. The dust and fiber ends will be blocked by the filter screen 20. Some of the dust and fiber ends that leak into the lower part of the filter screen 20 through the mesh of the filter screen 20 will be further blocked by the filter screen 21 to prevent them from entering the fan 22 below and having an adverse effect on the fan 22.

[0055] By setting up a collection component, fiber debris and some dust generated during the fabric cutting process can be effectively collected, ensuring the cleanliness of the workbench 1, reducing adverse effects on the fabric raw materials, reducing the inefficiency of manual cleaning, and greatly improving overall work efficiency.

[0056] Example 5:

[0057] This embodiment provides a fabric cutting machine for trouser production. In addition to the technical solutions of the above embodiments, it also has the following technical features: the cleaning components include:

[0058] Push plate 23 is slidably installed in the side hole 17 on the right side of dust collection box 16. The lower surface of push plate 23 is flush with the upper surface of filter screen 20. A fixing frame 24 is provided on the right side of push plate 23 and fixed to the lower surface of operating table 1. An electric push rod 25 is fixedly installed in the fixing frame 24. The telescopic rod end of electric push rod 25 is fixed to the outer wall of push plate 23. A collection box 26 is provided on the left side of dust collection box 16 and fixed to the lower surface of operating table 1. A baffle 27 is slidably installed at the bottom opening of collection box 26. Collection box 26 and dust collection box 16 are connected through side hole 17.

[0059] After a period of use, a certain amount of fiber debris and dust will accumulate on filter screen 20 and filter screen 21. At this time, the electric push rod 25 is activated, and its extension rod slides towards the dust collection box 16, pushing the push plate 23 to slide within the dust collection box 16. Under the action of the push plate 23, the fiber debris on filter screen 20 can be effectively cleaned, thus ensuring the normal operation of the collection component. Since most of the fiber debris and dust are effectively filtered by filter screen 20, the frequency of cleaning of filter screen 21 decreases, thus extending the maintenance cycle of filter screen 21. When cleaning filter screen 21 is required, simply twist... The dust collection box 16 can be completely removed downwards by fixing the bolts that secure it to the operating table 1. Then, the filter screen 20 and filter screen 21 can be cleaned or replaced sequentially from top to bottom. Furthermore, the push plate 23 pushes the fiber debris on the upper surface of the filter screen 20 and collects it into the collection box 26 through the side hole 17 on the left side of the dust collection box 16. When it is necessary to process the debris in the collection box 26, simply pull the baffle 27. Under the action of gravity, the debris in the inner cavity of the collection box 26 can be discharged from the bottom opening. It is worth noting that when the electric push rod 25 is working, the fan 22 is in a stopped state to avoid the instability of the cleaning process caused by the operation of the fan 22.

[0060] By setting up a cleaning component, the fiber debris and dust collected in the inner cavity of the dust collection box 16 can be centrally processed, ensuring the stable operation of the collection component.

[0061] The working principle of this device is as follows: In use, first, the fabric roll is placed on the fabric feeding roller 3. Then, the end of the fabric roll is pulled, allowing it to pass sequentially through the wrinkle removal mechanism. The two reversing rollers 5 in the wrinkle removal mechanism are referred to below as the upper reversing roller 5 and the lower reversing roller 5, respectively. When passing through the wrinkle removal mechanism, the fabric roll is first guided to the right from the upper surface of the upper reversing roller 5. Then, the fabric roll is inserted into the gap formed by the four turning plates 7, and then passes through from the left side of the lower reversing roller 5. After passing the lower surface of the lower reversing roller 5, it then passes through from the right side of the lower reversing roller 5. When viewed from the side, the overall... The fabric is arranged in an "S" shape. When the fabric passes through the de-wrinkling mechanism, it passes directly above the heating box 8. At this time, the infrared heating lamp 9 is activated. After the infrared heating lamp 9 is powered on, it starts to work and heats up, thereby raising the air temperature directly above the heating box 8 and heating the passing fabric. After the fabric is heated, the fibers in the fabric are softened. The softened fabric is guided by multiple guide rollers 12 and gradually becomes horizontal until it is smoothly conveyed to the upper surface of the slide rail 14. Then, the fabric cutter 15 is activated to cut the fabric raw material.

[0062] The embodiments of this application have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A cloth cutting machine for producing trousers, characterized by comprising: Include: The operating platform (1), the upper surface of the operating platform (1) is fixed with support frame (2) on the left side symmetry, the top of two support frame (2) is rotatably mounted cloth roll (3), the upper surface of the operating platform (1) and located at the right side of two support frame (2) is provided with fold mechanism for leveling cloth, the upper surface of the operating platform (1) and located at the middle position is provided with through slot (13), the upper surface of the operating platform (1) and located above the through slot (13) is provided with slide rail (14), the side of the slide rail (14) is provided with cloth cutter (15) fixedly installed on the side wall of the operating platform (1); The dust collection mechanism is arranged below the operating platform (1) and close to the position of the through slot (13), and is used for collecting the debris and threads generated when the material is cut.

2. The fabric breaking machine for producing trousers according to claim 1, characterized in that, The fold mechanism comprises: Two support rods (4), two support rods (4) are symmetrically arranged and fixed with the upper surface of the operating platform (1), two reversing rollers (5) are rotatably installed between two support rods (4), two turning blocks (6) are symmetrically arranged between two reversing rollers (5), two turning blocks (6) are rotatably connected with the inner wall of the corresponding side support rod (4), and the other side of the turning block (6) is rotatably installed with C-shaped turning clamping plate (7).

3. The fabric breaking machine for producing trousers according to claim 2, characterized in that, The upper surface of the operating platform (1) and located at the bottom position between two support rods (4) is provided with softening assembly for softening fiber, the softening assembly is composed of heating box (8), infrared heating lamp (9) and protective mesh plate (10), the heating box (8) is fixedly installed on the upper surface of the operating platform (1) and located between two support rods (4), the infrared heating lamp (9) is fixedly installed in the inner cavity of the heating box (8), and the protective mesh plate (10) is fixedly installed on the top opening of the heating box (8) through bolts.

4. The fabric breaking machine for producing trousers according to claim 1, characterized in that, The upper surface of the operating platform (1) and located at the right side of the fold mechanism is symmetrically fixed with side plate (11), a plurality of guide rollers (12) are rotatably installed between two side plates (11), and the lower surface of the guide roller (12) is flush with the upper surface of the slide rail (14).

5. The fabric breaking machine for producing trousers according to claim 1, characterized in that, The dust collection mechanism comprises a collection assembly for collecting debris and threads and a cleaning assembly for cleaning the inner cavity of the collection assembly.

6. The fabric breaking machine for producing trousers according to claim 5, characterized in that, The collection assembly comprises: A dust collecting box (16) is internally hollow in a top opening structure, is fixedly installed on the lower surface of the operating table (1) and is located directly below the through slot (13), symmetrical side holes (17) are formed on the left and right sides of the dust collecting box (16), a bottom groove one (18) is formed on the inner bottom surface of the dust collecting box (16), a bottom groove two (19) is formed on the inner bottom surface of the bottom groove one (18), a plurality of air holes are formed on the bottom surface of the bottom groove two (19) in a uniform distribution, a filter screen one (20) is clamped and installed in the bottom groove one (18), a filter screen two (21) is clamped and installed in the bottom groove two (19), and a fan (22) is fixedly installed on the bottom of the dust collecting box (16).

7. The fabric breaking machine for producing trousers according to claim 6, characterized in that, The cleaning assembly comprises: A push plate (23) is slidingly installed in the right side hole (17) of the dust collecting box (16), the lower surface of the push plate (23) is flush with the upper surface of the filter screen one (20), a fixed frame (24) is arranged on the right side of the push plate (23) and is fixed to the lower surface of the operating table (1), an electric push rod (25) is fixedly installed in the fixed frame (24), the telescopic rod end of the electric push rod (25) is fixed to the outer wall of the push plate (23), a collecting box (26) is arranged on the left side of the dust collecting box (16) and is fixed to the lower surface of the operating table (1), a baffle (27) is slidingly installed at the bottom opening of the collecting box (26), and the collecting box (26) is in communication with the dust collecting box (16) through the side hole (17).

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