Low noise high speed paper stop, folding machine and deceleration device for conveying sheet material

Abstract

The application provides a low-noise high-speed paper stopping device, a folding machine and a deceleration device for conveying sheet materials, wherein the low-noise high-speed paper stopping device is installed on a folding fence of the folding machine and comprises a paper stopping plate arranged in a gap between adjacent folding fences and used for stopping paper, a paper deceleration mechanism arranged in front of the paper stopping plate in a paper movement direction and connected with the paper stopping plate and used for decelerating the paper, and a movement adjusting assembly arranged on a side of the folding fence and connected with the paper stopping plate and the paper deceleration mechanism and used for adjusting positions of the paper stopping plate and the paper deceleration mechanism in the paper movement direction. The application can greatly decelerate the paper before the paper collides with the folding fence, greatly reduce noise generated when the paper collides with the folding fence, has little influence on the efficiency of the whole folding process, can be applied to paper deceleration and noise reduction in the folding process of the fence-type folding machine and the fence-knife hybrid folding machine, and can also be applied to deceleration and noise reduction of sheet materials in the conveying process.

Description

Technical Field

[0001] This invention relates to the field of folding machine technology, specifically to a low-noise, high-speed paper-stopping device, a folding machine, and a deceleration device for conveying sheet material. Background Technology

[0002] Noise is one of the most common occupational hazards. Excessive noise not only adversely affects workers' health, causing hearing loss and noise-induced deafness, but also negatively impacts the cardiovascular, nervous, endocrine, immune, digestive, and metabolic systems. According to GBZ2.2-2007 "Occupational Exposure Limits for Hazardous Factors in the Workplace Part 2," workers should not work more than 8 hours per day in an environment with a steady-state noise limit of 85 dB(A). Measurements show that the noise level within 1 meter of a single folding machine during operation exceeds 90 dB(A). In actual production, multiple folding machines are often used simultaneously, further increasing the health risks to operators.

[0003] With the transformation and upgrading of the printing industry, the capacity and efficiency of post-press processing enterprises have been greatly improved. The improvement in efficiency inevitably requires the speed of folding machines, which in turn leads to an increase in the speed and frequency of paper hitting the baffle, resulting in a significant increase in the loudness and frequency of noise. The action of paper hitting the baffle has become one of the biggest sources of noise in the folding process.

[0004] Currently, the main noise reduction method on the market uses soundproof enclosures, which enclose the entire hinged grille inside. This method makes it inconvenient to adjust the hinged grille during use and is also expensive. Furthermore, due to space constraints, soundproof enclosures cannot be installed on hinged grilles installed at the bottom of machines, resulting in generally poor sound insulation. Summary of the Invention

[0005] The present invention was made to solve the above-mentioned problems, and aims to provide a low-noise high-speed paper-blocking device, a folding machine, and a deceleration device for conveying sheet material.

[0006] This invention provides a low-noise, high-speed paper-stopping device, installed on the folding rails of a folding machine, for blocking paper moving upwards in the gap between adjacent folding rails. It is characterized by comprising: a paper stop plate disposed in the gap for blocking the paper; a paper deceleration mechanism disposed in front of and connected to the paper stop plate in the paper movement direction for decelerating the paper; and a movement adjustment component disposed on the side of the folding rails and connected to the paper stop plate and the paper deceleration mechanism for adjusting the positions of the paper stop plate and the paper deceleration mechanism in the paper movement direction.

[0007] The low-noise high-speed paper-stopping device provided by the present invention may also have the following features: the paper deceleration mechanism uses friction to decelerate the paper, including a brush wheel assembly and a drive motor, wherein the brush wheel assembly is driven by the drive motor to provide a force opposite to the direction of paper movement.

[0008] Furthermore, a side support plate is connected to each end of the stop surface of the baffle plate. The brush wheel assembly includes a rotating shaft and multiple brush wheels mounted on the rotating shaft. The two ends of the rotating shaft are rotatably mounted on the two side support plates. The drive motor is mounted on one side support plate and its output shaft is connected to one end of the rotating shaft.

[0009] The low-noise high-speed paper-stopping device provided by the present invention may also have the following features: the paper deceleration mechanism uses adsorption to decelerate the paper, including an adsorption plate, an air suction component, an air blowing component, and a control device. The adsorption plate is connected to the lower edge of the paper stop and is flush with the surface of the folding grid located below the paper stop. The part of the adsorption plate in front of the paper stop in the paper movement direction has multiple air holes. The air suction component is connected to the air holes and is used to adsorb and decelerate the paper. The air blowing component is connected to the air holes and is used to blow air to completely separate the paper from the adsorption plate. The control device is connected to and controls the operation of the air suction component and the air blowing component.

[0010] Furthermore, the inhalation assembly includes a negative pressure air source, a negative pressure control valve, and a negative pressure air pipe. The negative pressure air source and the negative pressure control valve, as well as the negative pressure control valve and a portion of the air holes, are connected by negative pressure air pipes. The blowing assembly includes a positive pressure air source, a positive pressure control valve, and a positive pressure air pipe. The positive pressure air source and the positive pressure control valve, as well as the positive pressure control valve and another portion of the air holes, are connected by positive pressure air pipes. The opening and closing of both the negative pressure control valve and the positive pressure control valve are controlled by a control device.

[0011] The low-noise high-speed paper-stopping device provided by the present invention may also have the following features: the moving adjustment component includes multiple adjustment gears and a gear belt, the multiple adjustment gears are arranged sequentially along the paper movement direction and are connected by transmission through the gear belt, the middle adjustment gear is rotatably connected to the paper stop plate and the paper deceleration mechanism, and the remaining adjustment gears are rotatably mounted on the frame at the location of the folding grid.

[0012] The low-noise high-speed paper-blocking device provided by the present invention may also have the following features: the paper block includes a comb tooth portion disposed in the air and two layers of rubber and plastic layers wrapped around the stop surface and the opposite surface of the comb tooth portion.

[0013] The low-noise high-speed paper-blocking device provided by the present invention may also have the following features: the paper block includes a comb tooth portion disposed in the air and rubber blocks that are closely attached side by side to the sides of each comb tooth portion, and the stop surface of the rubber blocks protrudes slightly from the stop surface of the comb tooth.

[0014] The present invention also provides a folding machine, characterized by including the aforementioned low-noise, high-speed paper stop device.

[0015] The present invention also provides a deceleration device for conveying sheet materials such as paper, film, and aluminum foil, which is characterized by including the aforementioned low-noise high-speed blocking device.

[0016] The role and effect of invention

[0017] According to the present invention, the low-noise high-speed paper-stopping device, folding machine, and deceleration device for conveying sheet materials are provided. The low-noise high-speed paper-stopping device includes a paper stop plate, a paper deceleration mechanism, and a moving adjustment component. The paper deceleration mechanism is positioned in front of the paper stop plate in the paper's movement direction. The paper deceleration mechanism can decelerate the paper before it collides with the paper stop plate by means of friction or adsorption. The moving adjustment component can adjust the positions of the paper stop plate and the paper deceleration mechanism in the paper's movement direction to meet the blocking requirements of different paper sizes. Therefore, the present invention can significantly decelerate the paper before it collides with the paper stop plate, thereby greatly reducing the noise generated when the paper collides with the paper stop plate. Moreover, it has little impact on the production efficiency of the folding process. It can be applied to paper deceleration and noise reduction in the folding process of grid-type folding machines and grid-knife hybrid folding machines, and can also be applied to deceleration and noise reduction during the transmission of sheet materials such as paper, film, and metal sheets. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the folding machine in Embodiment 1 of the present invention;

[0019] Figure 2 This is a top view schematic diagram of the low-noise high-speed paper-blocking device in Embodiment 1 of the present invention;

[0020] Figure 3 This is a schematic diagram of an optional structure of the baffle plate in Embodiment 1 of the present invention;

[0021] Figure 4 This is a schematic diagram of another optional structure of the baffle plate in Embodiment 1 of the present invention;

[0022] Figure 5 This is a schematic diagram of the folding machine in Embodiment 2 of the present invention;

[0023] Figure 6 This is a top view schematic diagram of the low-noise high-speed paper-blocking device in Embodiment 2 of the present invention;

[0024] Figure 7 This is a schematic diagram of the working process of the low-noise high-speed paper-blocking device in Embodiment 2 of the present invention.

[0025] Explanation of reference numerals in the attached figures:

[0026] 1. Paper; 10. Paper feeding mechanism; 20. Conveying mechanism; 30. Folding mechanism; 31. Upper folding roller; 32. Lower folding roller; 33. Upper folding gate; 34. Lower folding gate; 35. Low-noise high-speed paper stop device; 351. Paper stop plate; 3511. Comb teeth; 3512. Rubber and plastic layer; 3513. Rubber block; 352. Side support plate; 353. Rotating shaft; 354. Brush wheel; 355. Drive motor; 356. Adjusting gear; 357. Gear belt; 36. Low-noise high-speed paper stop device; 361. Paper stop plate; 362. Adsorption plate; 3621. Air hole; 363. Negative pressure air source; 364. Negative pressure control valve; 365. Negative pressure air pipe; 366. Positive pressure air source; 367. Positive pressure control valve; 368. Positive pressure air pipe; 369. Control device; 3610. Side support plate; 3611. Adjusting gear; 3612. Gear belt. Detailed Implementation

[0027] To make the technical means, creative features, objectives and effects of this invention easier to understand, the following embodiments are described in detail with reference to the accompanying drawings.

[0028] Example 1

[0029] Figure 1 This is a schematic diagram of the folding machine in this embodiment.

[0030] like Figure 1 As shown, this embodiment provides a folding machine, which is a fence-type folding machine, including a paper feeding mechanism 10, a conveying mechanism 20, and a folding mechanism 30 arranged in sequence.

[0031] The paper feeding mechanism 10 is used for feeding paper 1, and the conveying mechanism 20 is used for conveying paper 1. The paper feeding mechanism 10 and the conveying mechanism 20 can adopt existing technologies and there is no inventive point.

[0032] The folding mechanism 30 is used for folding paper 1 and typically includes an upper folding roller 31, a lower folding roller 32, an upper folding gate 33, a lower folding gate 34, and a stop plate 351. The rotation directions of the upper folding roller 31 and the lower folding roller 32 are shown in the figure. The stop plate 351 is installed in the gap between adjacent upper folding gates 33 and lower folding gates 34. The position of the stop plate 351 can be moved and adjusted to meet the blocking requirements of different sizes of paper 1.

[0033] The working principle of the folding mechanism 30 is as follows: The paper 1 conveyed by the conveying mechanism 20 first reaches between the upper folding roller 31 and the lower folding roller 32, and then enters the gap between the upper folding gate 33 and the lower folding gate 34 under the friction of the upper folding roller 31 and the lower folding roller 32, and is blocked by the stop plate 351. Then, under the friction of the two lower folding rollers 32, it enters the gap between the two lower folding rollers 32, completing the folding. In order to reduce the speed of the paper 1 and the noise of the paper 1 hitting the stop plate 351, the folding mechanism 30 in this embodiment is designed with a low-noise high-speed paper-stopping device 35 for the stop plate 351. The structure of the low-noise high-speed paper-stopping device 35 is described in detail below.

[0034] Figure 2 This is a top view of the low-noise, high-speed paper-blocking device 35 in this embodiment.

[0035] like Figure 1 and Figure 2 As shown, the low-noise, high-speed paper-stopping device 35 includes a paper stop plate 351, a brush wheel assembly, a drive motor 355, and a movement adjustment assembly. The paper stop plate 351 and the brush wheel assembly are both installed in the space between adjacent upper folding gates 33 and lower folding gates 34. The brush wheel assembly is positioned upstream of the paper stop plate 351 in the paper movement direction and is driven by the drive motor 355 to provide a force opposite to the paper movement direction. The brush wheel assembly and the drive motor 355 constitute a paper deceleration mechanism. The movement adjustment assembly is located on the sides of the upper folding gates 33 and lower folding gates 34 and is used to adjust the position of the paper stop plate 351 and the brush wheel assembly in the paper movement direction.

[0036] In this embodiment, as Figure 2 As shown, the two ends of the stop surface of the paper stop 351 used to block the paper 1 are respectively connected to a side support plate 352. The brush wheel assembly includes a rotating shaft 353 and multiple brush wheels 354 mounted on the rotating shaft 353. The two ends of the rotating shaft 353 are respectively rotatably mounted on the two side support plates 352. The drive motor 355 is mounted on one side support plate 352, and its output shaft is connected to one end of the rotating shaft 353 through a coupling. The moving adjustment assembly includes three adjusting gears 356 and a gear belt 357. The three adjusting gears 356 are arranged sequentially along the paper movement direction and are connected to each other through the gear belt 357. The middle adjusting gear 356 is rotatably mounted on the outer side of the other side support plate 352. The other two adjusting gears 356 are rotatably mounted on the frame where the folding gate is located. Rotating any one of the adjusting gears 356 can drive the paper stop 351, the brush wheel assembly, the drive motor 355, and the two side support plates 352 to move together in the paper movement direction.

[0037] The working process and principle of the low-noise high-speed paper-stopping device 35: The paper 1, which enters between the upper folding gate 33 and the lower folding gate 34 and moves upward, is first decelerated by the friction of the brush wheel 354 driven by the drive motor 355, and then stopped by the blocking plate 351. Since the speed of the paper 1 has been greatly reduced before it collides with the blocking plate 351, the collision noise generated is small.

[0038] The brush wheel 354 can be made of synthetic fibers, plant fibers, animal hair, or other fibers. There is an adjustable gap between the brush wheel 354 and the lower folding gate 34. The size of the gap needs to be set according to the thickness of the paper 1 and the movement speed. The adjustable gap can be achieved using conventional techniques commonly used by those skilled in the art, such as adjusting bolts or lead screw slider modules.

[0039] Figure 3 and Figure 4 These are schematic diagrams of two optional structures for the baffle plate 351 in this embodiment.

[0040] The baffle plate 351 has three possible structures: First, the baffle plate 351 is a common metal baffle with an L-shaped cross-section and comb teeth 3511, the comb teeth 3511 being disposed in the space between adjacent upper folding gates 33 and lower folding gates 34; Second, as... Figure 3 As shown, based on the first structure, a layer of rubber-plastic layer 3512 is wrapped around both the stop surface and the opposite surface of the comb-tooth portion 3511 of the baffle plate 351; thirdly, as Figure 4 As shown, each tooth of the comb portion 3511 of the baffle plate 351 has a rubber block 3513 arranged side by side and closely attached to its side. The stop surface of the rubber block 3513 protrudes slightly from the stop surface of the comb tooth. The selection of these three types of baffle plates 351 is determined by the movement speed of the paper 1. Among them, the baffle plate 351 with rubber-plastic layer 3512 and rubber block 3513 can further slow down and reduce noise of the paper 1. The baffle plate 351 with rubber-plastic layer 3512 has the best effect in slowing down and reducing noise of the paper 1.

[0041] Example 2

[0042] Figure 5 This is a schematic diagram of the folding machine in this embodiment.

[0043] like Figure 5 As shown, this embodiment provides a folding machine, including a paper feeding mechanism 10, a conveying mechanism 20, and a folding mechanism 30 arranged sequentially. The difference from Embodiment 1 lies in the low-noise, high-speed paper-stopping device 36 of the folding mechanism 30.

[0044] Figure 6 This embodiment presents a top view of the low-noise, high-speed paper-blocking device.

[0045] like Figure 5 and Figure 6 As shown, the low-noise, high-speed paper-stopping device 36 includes a paper stop 361, an adsorption plate 362, an air suction assembly, an air blowing assembly, a control device 369, and a movement adjustment assembly. The paper stop 361 is installed in the gap between the upper folding gate 33 and the lower folding gate 34. The adsorption plate 362 is connected to the lower edge of the paper stop 361 and is flush with the lower folding gate 34. The adsorption plate 362 can be installed from below the lower folding gate 34. Multiple air holes 3621 are provided on the portion of the adsorption plate 362 located before (or upstream of) the paper stop 361 in the paper movement direction. The air suction assembly is connected to the air holes 3621 and is used to adsorb and decelerate the paper 1. The air suction assembly and the adsorption plate 362 form a paper deceleration mechanism. The air blowing assembly is connected to the air holes 3621 and is used to blow air to detach the paper 1 from the adsorption plate 362 for the next folding process. The control device 369 is connected to and controls the operation of the air suction assembly and the air blowing assembly. The movable adjustment components are located on the sides of the upper folding gate 33 and the lower folding gate 34, and are used to adjust the position of the guide plate 361 and the suction plate 362 in the paper movement direction.

[0046] In this embodiment, the structure of the baffle plate 361 is the same as that in Embodiment 1, and three structures are available. The suction assembly includes a negative pressure air source 363, a negative pressure control valve 364, and a negative pressure air pipe 365. The negative pressure air source 363 and the negative pressure control valve 364, as well as a portion of the air holes 3621 of the negative pressure control valve 364 and the adsorption plate 362, are connected by the negative pressure air pipe 365. The blowing assembly includes a positive pressure air source 366, a positive pressure control valve 367, and a positive pressure air pipe 368. The positive pressure air source 366 and the positive pressure control valve 367, as well as another portion of the air holes 3621 of the positive pressure control valve 367 and the adsorption plate 362, are connected by the positive pressure air pipe 368. A sensor for sensing the paper 1 is provided on the adsorption plate 362. (Not shown in the figure) The control device 369 can be a controller and / or control circuit that can control valves according to the prior art. The control device 369 controls the opening and closing of the negative pressure control valve 364 and the positive pressure control valve 367 according to the sensor signal. The moving adjustment assembly includes three adjusting gears 3611 and a gear belt 3612. Its basic structure is the same as that in Embodiment 1, but the difference is that one end of the baffle plate 361 and one end of the adsorption plate 362 are connected to a side support plate 3610. The adjusting gear 3611 located in the middle is rotatably mounted on the side support plate 3610. Rotating any one of the adjusting gears 3611 can drive the baffle plate 361, the adsorption plate 362 and the side support plate 3610 to move together in the paper movement direction.

[0047] Figure 7 This is a schematic diagram of the working process of the low-noise, high-speed paper-blocking device 36.

[0048] like Figure 7 As shown, the working process and principle of the low-noise high-speed paper-stopping device 36 are as follows: Before the paper 1, which enters between the upper folding grid 33 and the lower folding grid 34 and moves upward, comes into contact with the adsorption plate 362, the control device 369 keeps the negative pressure control valve 364 in the open state and the positive pressure control valve 367 in the closed state. At this time, the negative pressure air source 363 draws air through the negative pressure air pipe 365 and the air hole 3621. When the paper 1 passes the adsorption plate 362, the paper 1 is subjected to an adsorption force perpendicular to the lower folding grid 34, and its speed is reduced. Then it is blocked by the paper stop 361 and stops moving. Since the speed of the paper 1 has been greatly reduced before it collides with the paper stop 361, the collision noise generated is small. Subsequently, the control device 369 receives a signal from the sensor that the paper 1 has stopped, causing the negative pressure control valve 364 to open and the positive pressure control valve 367 to close. At this time, the positive pressure air source 366 blows air through the positive pressure air pipe 368 and the air hole 3621, causing the paper 1 to completely separate from the suction plate 362 and move downwards for the next folding process. After the paper 1 leaves the suction plate 362, the control device 369 receives a signal from the sensor and again opens the negative pressure control valve 364 and closes the positive pressure control valve 367, thus starting the next cycle.

[0049] It should be noted that the folding machine structure in the above two embodiments can be applied not only to grid-type folding machines but also to grid-knife hybrid folding machines. The low-noise, high-speed paper-stopping device can be used not only for paper deceleration and noise reduction during the folding process of a folding machine but also for deceleration and noise reduction during the transport of thin materials such as paper, film, and metal sheets.

[0050] The role and effect of the embodiments

[0051] According to the folding machine and the low-noise high-speed paper-stopping device included in the above embodiments, the low-noise high-speed paper-stopping device includes a paper stop plate, a paper deceleration mechanism, and a moving adjustment component. The paper deceleration mechanism is positioned in front of the paper stop plate in the paper movement direction. The paper deceleration mechanism can decelerate the paper before it collides with the paper stop plate by means of friction or adsorption. The moving adjustment component can adjust the position of the paper stop plate and the paper deceleration mechanism in the paper movement direction to meet the blocking requirements of different paper sizes. Therefore, this low-noise high-speed paper-stopping device can significantly decelerate the paper before it collides with the paper stop plate, thereby significantly reducing the noise generated when the paper collides with the paper stop plate. Moreover, it has little impact on the production efficiency of the folding process. It can be applied to paper deceleration and noise reduction in the folding process of grid-type folding machines and grid-knife hybrid folding machines. It can also be applied to deceleration and noise reduction in the transmission process of thin sheet materials such as paper, film, and metal sheet.

[0052] The paper deceleration mechanism, which uses friction to slow down the paper, includes a brush wheel assembly and a drive motor. The brush wheel assembly is driven by the drive motor to provide a force opposite to the direction of paper movement, thereby achieving the deceleration function.

[0053] The paper deceleration mechanism, which uses adsorption to slow down the paper, includes an adsorption plate, an air suction component, an air blowing component, and a control device. The adsorption plate is connected to the lower edge of the guide plate and is flush with the lower folding grid. The part of the adsorption plate in front of the guide plate has multiple air holes. The air suction component is connected to the air holes and is controlled by the control device to adsorb the paper and achieve the deceleration function. The air blowing component is connected to the air holes and is controlled by the control device to blow air, so that the paper is completely separated from the adsorption plate for the next folding process.

[0054] The movable adjustment component uses a combination of adjusting gears and gear belts to make the paper stop plate and paper speed reduction mechanism movable.

[0055] The above embodiments are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention.

Claims

1. A low-noise, high-speed paper-stopping device, installed on the folding rails of a folding machine, for blocking paper moving upwards in the space between adjacent folding rails, characterized in that, include: A paper baffle is provided in the cavity to block the paper. A paper deceleration mechanism is disposed in front of and connected to the paper stop in the direction of paper movement, and is used to decelerate the paper. as well as A movable adjustment component, disposed on the side of the folding gate and connected to the paper stop and the paper deceleration mechanism, is used to adjust the position of the paper stop and the paper deceleration mechanism in the paper movement direction. The paper deceleration mechanism uses adsorption to slow down the paper, and includes an adsorption plate, an air suction assembly, an air blowing assembly, and a control device. The adsorption plate is connected to the lower edge of the baffle plate and is flush with the surface of the folding grille located below the baffle plate. The portion of the adsorption plate in the paper movement direction ahead of the baffle plate has multiple air holes. The adsorption plate is also equipped with a sensor for sensing the paper. The suction assembly is connected to the air holes and is used to adsorb and slow down the paper. The blowing assembly is connected to the air holes and is used to blow air to detach the paper from the adsorption plate. The control device is connected to and controls the operation of the suction assembly and the blowing assembly. Before the paper comes into contact with the adsorption plate, the control device controls the suction component to extract air. When the paper passes the adsorption plate, the paper slows down due to the adsorption force and then stops moving because it is blocked by the baffle plate. After that, the control device receives a signal from the sensor that the paper has stopped, controls the suction component to turn off and controls the blowing component to blow air, so that the paper is completely separated from the adsorption plate and moves downward.

2. The low-noise, high-speed paper-stopping device according to claim 1, characterized in that: in, The intake assembly includes a negative pressure air source, a negative pressure control valve, and a negative pressure air pipe. The negative pressure air source and the negative pressure control valve, as well as the negative pressure control valve and the air port, are respectively connected by the negative pressure air pipe. The air blowing assembly includes a positive pressure air source, a positive pressure control valve, and a positive pressure air pipe. The positive pressure air source and the positive pressure control valve, as well as the positive pressure control valve and the air port, are respectively connected by the positive pressure air pipe. The opening and closing of both the negative pressure control valve and the positive pressure control valve are controlled by the control device.

3. The low-noise, high-speed paper-stopping device according to claim 1, characterized in that: in, The movable adjustment assembly includes multiple adjusting gears and a gear belt. Multiple adjusting gears are arranged sequentially along the paper movement direction and are connected by a gear belt. One of the adjusting gears in the middle is rotatably connected to the paper stop and the paper speed reduction mechanism, while the remaining adjusting gears are rotatably mounted on the frame at the location of the folding gate.

4. The low-noise, high-speed paper-stopping device according to claim 1, characterized in that: in, The baffle plate includes a comb tooth portion disposed in the cavity and two layers of rubber and plastic wrapping the stop surface and the opposite surface of the comb tooth portion.

5. The low-noise, high-speed paper-stopping device according to claim 1, characterized in that: in, The baffle plate includes a comb tooth portion disposed in the cavity and rubber blocks that are closely attached side by side to the sides of each comb tooth portion, the stop surface of the rubber blocks being slightly protruding from the stop surface of the comb tooth.

6. A folding machine, characterized in that, include: The low-noise, high-speed paper-stopping device according to any one of claims 1 to 5.

7. A speed reduction device for conveying thin sheet material, characterized in that, include: The low-noise, high-speed paper-stopping device according to any one of claims 1 to 5.

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