Low-noise high-speed paper blocking device and folding machine

Abstract

The invention discloses a low-noise paper blocking device and a folding machine, and belongs to the field of folding machines. The low-noise paper blocking device comprises a folding fence, a paper buffering structure and a buffering adjusting structure; the folding fence comprises an upper fence and a lower fence which are parallel and oppositely arranged at intervals, the paper buffering structure is arranged in a neutral gear area between the upper fence and the lower fence and used for reducing the impact speed of paper, and the buffering adjusting structure is used for adjusting the position of the paper buffering structure in the paper moving direction. According to the low-noise high-speed paper blocking device provided by the invention, through the arrangement of the paper buffering structure, the paper conveying speed can be effectively slowed down, so that the noise generated during paper collision is reduced, and meanwhile, the folding efficiency of the paper is not influenced as much as possible; and in addition, through the arrangement of the buffer adjusting structure, the position of the paper buffer structure can be adjusted, and therefore the folding of paper of different sizes and specifications at different positions is adapted.

Description

Technical Field

[0001] The present invention relates to the technical field of folding machines, and in particular to a low-noise paper stopper and a folding machine. Background Art

[0002] Noise is the most common occupational hazard. Noise that exceeds the normal range not only has adverse effects on the health of workers, but also causes hearing loss and noise-induced deafness. It also has adverse effects on the cardiovascular system, nervous system, endocrine system, immune system, digestive system and metabolic function.

[0003] According to the requirements of GBZ2.2-2007 "Occupational Exposure Limits for Hazardous Factors in the Workplace, Part 2", workers should not work more than 8 hours a day in an environment with a steady-state noise limit of 85dB(A). According to measurements, the noise within 1 meter of a single folding machine during operation is greater than 90dB(A), and in actual production, multiple folding machines are often used at the same time, and the noise is more harmful to the health of operators.

[0004] With the transformation and upgrading of the printing industry, the production capacity and efficiency of post-press processing companies have been greatly improved. The improvement of efficiency will inevitably require the speed of folding machines to increase, which will increase the speed and frequency of paper hitting the baffle, and the loudness and frequency of the noise generated will also increase significantly. The action of paper hitting the baffle board has become one of the biggest sources of noise in the folding process.

[0005] Currently, the main method of noise reduction on the market is to use a soundproof box, which wraps the entire folding fence in the soundproof box. This method is not convenient for adjusting the folding fence during use and is expensive. In addition, the folding fence installed at the bottom of the machine cannot be installed with a soundproof box due to limited space, so the overall sound insulation effect is not good. Summary of the invention

[0006] In view of the problems in the prior art that when the folding machine is working, the impact noise of the papers is relatively loud and the sound insulation effect of the sound insulation box is not good, the purpose of the present invention is to provide a low-noise paper blocking device and a folding machine so as to at least partially solve the above problems.

[0007] To achieve the above object, the technical solution of the present invention is: In a first aspect, the present invention provides a low-noise paper stop device, comprising a folding fence, a paper buffer structure and a buffer adjustment structure; the folding fence comprises upper and lower fences arranged in parallel and relatively spaced apart, the paper buffer structure is used to slow down the impact speed of the paper when it moves between the upper and lower fences, and the buffer adjustment structure is used to adjust the position of the paper buffer structure in the direction of paper movement.

[0008] In some preferred embodiments, the paper buffer structure includes a baffle base, a spring and a baffle plate which are connected in sequence, and the baffle plate is located on the side facing the paper.

[0009] In some preferred embodiments, the baffle is a thin sheet structure.

[0010] In some preferred embodiments, a thin sheet is detachably connected to the side of the baffle plate facing the paper. In some preferred embodiments, the paper buffer structure comprises a base body and a baffle plate connected to each other, wherein the baffle plate is located on the side facing the paper; wherein the baffle plate and / or the baffle plate base has a thin-walled cavity, and the thin-walled cavity is filled with a buffer.

[0011] In some preferred embodiments, the buffer is a high-pressure gas or liquid.

[0012] In some preferred embodiments, the buffer adjustment structure includes a sliding member, a gear, a rack and a positioning member. The sliding member slides relative to the folding fence along the direction of paper movement, and the paper buffer mechanism is fixed on the sliding member. The gear is rotatably connected to the sliding member, the gear is meshed with the rack, and the positioning member is used to control the rotation state of the gear.

[0013] In some preferred embodiments, the positioning member includes a card block and a card block driving mechanism, the card block is provided with a tooth profile meshing with the gear, the card block is movably connected relative to the sliding member, and the card block driving mechanism is used to control the meshing state between the card block and the gear.

[0014] In some preferred embodiments, the buffer adjustment structure further includes a driving member, an output end of which is connected to the sliding member, and the driving member is used to adjust the position of the sliding member; alternatively, the positioning member is replaced by the driving member.

[0015] In a second aspect, the present invention further provides a folding machine, comprising the low-noise paper stopper as described above.

[0016] By adopting the above technical scheme, the beneficial effects of the present invention are as follows: in the low-noise and high-speed paper blocking device provided by the present invention, the paper conveying speed can be effectively slowed down by setting the paper buffer structure, thereby reducing the noise generated when the paper collides, while at the same time not affecting the paper folding efficiency as much as possible; in addition, by setting the buffer adjustment structure, the position of the paper buffer structure can be adjusted, so as to adapt to the folding of papers of different sizes and specifications at different positions. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic structural diagram of a low-noise and high-speed paper stopper in Example 1 of the present invention.

[0018] Figure 2 1. A top view of the low-noise and high-speed paper stopper in Example 1 of the present invention.

[0019] Figure 3 This is a schematic structural diagram of the stop gauge base and the stop plate in Example 1 of the present invention.

[0020] Figure 4 1. A top view of a low-noise, high-speed paper stopper in Example 2 of the present invention.

[0021] Figure 5 Another top view of the low-noise and high-speed paper blocking device in Example 2 of the present invention.

[0022] Figure 6 Schematic diagram of the structure of the low-noise and high-speed paper stop device in Example 3 of the present invention.

[0023] Figure 7 Schematic diagram of the structure of the paper buffer structure in Example 3 of the present invention.

[0024] Figure 8 It is a structural schematic diagram of the folding machine in Example 4 of the present invention.

[0025] Fig. 9 This is another structural schematic diagram of the folding machine in Example 4 of the present invention.

[0026] In the figure: 1-folding fence, 2-paper buffer structure, 21-block gauge base, 211-base body, 212-block plate, 213-buffer, 22-spring, 23-baffle, 231-baffle body, 232-tooth, 3-buffer adjustment structure, 31-sliding member, 32-gear, 33-rack, 34-positioning member, 341-block, 342-block drive mechanism, 35-drive member, 4-paper feed roller, 5-belt, 6-upper folding roller, 7-upstream lower folding roller, 8-downstream lower folding roller, 9-paper. DETAILED DESCRIPTION

[0027] The specific embodiments of the present invention are further described below in conjunction with the accompanying drawings. It should be noted that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation of the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0028] It should be noted that, in the description of the present invention, the directions or positional relationships indicated by the terms "up", "down", "left", "right", "front", "back", etc. are descriptions of the structure of the present invention based on the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0029] The "first" and "second" in this technical solution are only used to distinguish the names of the same or similar structures, or corresponding structures with similar functions, and are not an arrangement of the importance of these structures, nor do they have a ranking, comparison of size, or other meanings.

[0030] In addition, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense. For example, the connection can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be a connection between the two structures. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood based on the overall idea of ​​the present invention and the specific context of the present solution.

[0031] Example 1 A low noise paper stop device, such as Figure 1-3 As shown, it includes a folding fence 1, a paper buffer structure 2 and a buffer adjustment structure 3.

[0032] The folding fence 1 is fixed on the frame of the folding machine when in use. The folding fence 1 includes an upper fence and a lower fence that are arranged in parallel and relatively spaced apart, that is, there is a certain gap between the upper and lower fences, and the gap is suitable for allowing the paper to pass through it without hindrance, and it can also ensure that the paper will not bend in the gap. Usually, the upper and lower fences are arranged in an inclined shape. Before the paper is folded, it will move in the gap between the upper and lower fences in a bottom-to-top direction, and then the paper buffer mechanism 2 will slow down the impact speed of the paper, thereby reducing the noise generated by the paper impact action.

[0033] In this embodiment, the paper buffer structure 2 includes a baffle base 21, a spring 22 and a baffle 23 which are connected in sequence, and the baffle 23 is located on the side facing the paper.

[0034] The baffle 23 is a long thin sheet structure, and its plate surface is roughly perpendicular to the movement direction of the paper, so that the paper can hit the baffle 23 at the best angle. The baffle 23 includes a long baffle body 231 and a plurality of teeth 232 formed on the baffle body 231 along the length direction and arranged at intervals. For example, the baffle body 231 and the teeth 232 are an integral structure; the baffle body 231 can be arranged in the gap between the upper and lower fences, and the plurality of teeth 232 extend from the gaps of the upper and lower fences respectively; or, the baffle body 231 is arranged on the outside of the folding fence 1, and the plurality of teeth 232 extend into the gap between the upper and lower fences through the gaps. Such a configuration allows the baffle 23 to maintain a certain width dimension, and while improving the structural strength of the baffle 23, it will not affect the activity function of the baffle 23.

[0035] Similarly, the retaining gauge base 21 also has a structure similar to the baffle 23. For example, the cross-section of the retaining gauge base 21 is configured as an L-shape, and its side wall perpendicular to the direction of paper movement (called the baffle 211) also has teeth. Its side wall parallel to the direction of paper movement (called the base body 212) can also be arranged in the gap between the upper and lower fences, or on the outside of the folding fence 1.

[0036] There are usually a plurality of springs 22, which are arranged at intervals along the length direction of the baffle 23. Usually the springs 22 are arranged on the outside of the folding fence 1 to facilitate maintenance thereof.

[0037] It is easy to understand that a thin sheet, such as a thin paper sheet or a thin plastic sheet, can be installed on the side of the baffle 23 facing the paper in a detachable fixed connection manner. The installation method can be threaded connection, pin connection or gluing, so as to protect the baffle 23 and reduce the difficulty of maintenance.

[0038] The buffer adjustment structure 3 is used to adjust the position of the paper buffer structure 2 in the paper movement direction, so that different sizes of paper can obtain a good deceleration effect, thereby adapting to the folding of different sizes of paper at different positions.

[0039] The buffer adjustment structure 3 includes a sliding member 31 , a gear 32 , a rack 33 and a positioning member 34 .

[0040] The sliding member 31 slides relative to the folding fence 1 along the paper movement direction, and the retaining gauge base 21 in the paper buffer mechanism 2 is fixed on the sliding member 31. It is easy to understand that the sliding member 31 can be slidably connected to the frame of the folding machine through the slide rail slider structure, and the end of the retaining gauge base 21 in the length direction is fixed to the sliding member 31 by screws or welding after extending out of the coverage range of the folding fence 1. In other preferred embodiments, when the retaining plate 211 of the retaining gauge base 21 is arranged in the gap between the upper and lower fences, the retaining gauge base 21 can also be used directly as the sliding member 31. At this time, it is only necessary to make the thickness of the retaining plate 211 slightly smaller than the gap between the upper and lower fences, and make the tooth width on the base body 212 slightly smaller than the gap width of the upper and lower fences. At this time, the retaining gauge base 21 will be able to slide on the folding fence 1 along the paper movement direction, and other degrees of freedom are restricted.

[0041] The gear 32 is rotatably connected to the slide 31, for example, the gear 32 is fixed to the shaft by a key, and the shaft is rotatably connected to the bearing seat on the slide 31 by a bearing. The rack 33 is fixed to the frame of the folding machine by screws or welding in a direction parallel to the movement of the paper, and the gear 32 is meshed with the rack 33. When the gear 32 rolls on the rack 33, it can drive the paper buffer structure 2 to move, thereby changing the position of the paper buffer structure 2.

[0042] The positioning member 34 is used to control the rotation state of the gear 32 , that is, the positioning member 34 controls whether the gear 32 can move on the rack 33 , thereby fixing the position of the paper buffer structure 2 .

[0043] The positioning member 34 includes a block 341 and a block driving mechanism 342. The block 341 is provided with a tooth profile meshing with the gear 34. The block 341 is slidably connected to the sliding member 31 in a direction parallel to the axis of the gear 32 through a slider slot structure. The block driving mechanism 342 is used to drive the block 341 to move. When the block driving mechanism 342 drives the block 341 to a position where the tooth profile on the block is meshed with the gear 32, the gear 32 cannot rotate, its position on the rack 33 no longer changes, and the position of the corresponding paper buffer structure 2 is also fixed. The block driving mechanism 342 can be a source power component, such as a cylinder, a hydraulic cylinder, an electric cylinder or an electromagnet; the block driving mechanism 342 can also be a passive component, such as a spring or a spring, and the elastic force provided by the spring is used to make the block 341 in a position meshing with the gear 32. Of course, in other preferred embodiments, the block 341 can also be fixed on a swing arm, and the swing arm is rotatably connected to the sliding member 31.

[0044] When the position of the paper buffer structure 2 needs to be adjusted, the block 341 is driven away from the gear 32 by the block driving mechanism 342, and then a driving force is manually applied to the sliding member 31 to make the gear 32 roll on the rack 33, thereby changing the position of the paper buffer structure 2. After the position adjustment is completed, the block 341 is driven to be stuck on the gear 32 by the block driving mechanism 342. At this time, the gear 32 cannot rotate and the position of the paper buffer structure 2 is fixed.

[0045] Example 2 On the basis of embodiment 1, the buffer adjustment structure 3 further includes a driving member 35, such as Figure 4 As shown, it is fixed on the frame of the folding machine, such as a pneumatic cylinder, hydraulic cylinder or electric cylinder, and its output end is fixedly connected to the sliding member 31, thereby replacing manpower to adjust the position of the paper buffer structure 2. Accordingly, the card block driving mechanism 342 is configured as a source power component to cooperate with the driving member to improve the overall automation of the device.

[0046] It is easy to understand that when the driving member 35 has a self-locking function, the positioning member 34 can be cancelled. For example, the driving member 35 is configured as a cylinder, hydraulic cylinder or electric cylinder with a self-locking function. When it is not working, the position of its output end will be locked, so that the position of the paper buffer structure 2 will no longer change after the position adjustment is completed.

[0047] It is easy to understand that the positioning member 34 can also be eliminated, and the driving member 35 can be configured as a motor fixed on the sliding member 31, such as Figure 5 As shown, the gear 32 is then adjusted to be fixedly mounted on the motor shaft of the motor, and the motor is configured to have a self-locking function. With this arrangement, the position of the paper buffer structure 2 can be adjusted by controlling the forward and reverse rotation of the motor.

[0048] Example 3 Compared with Example 1, the paper buffer structure 3 of this embodiment has a different structure. Specifically, the spring 22 and the baffle 23 are cancelled, and only the baffle base 21 is retained. That is, the paper buffer structure 1 now only includes a base body 212 and a baffle 211 that are interconnected. The baffle 211 is perpendicular to the movement direction of the paper and is located on the side facing the paper.

[0049] In this embodiment, Figure 6-7 As shown, a thin-walled cavity is configured in the baffle 211, and the thin-walled cavity is filled with a buffer 213, and the buffer is gas or liquid. When the buffer is gas, the gas is high-pressure gas.

[0050] It is easy to understand that the thin-wall cavity can also be provided in the base body 212 alone, or in the blocking piece 211 and the base body 212 at the same time.

[0051] With such arrangement, when the paper hits the baffle 211 , the kinetic energy of the impact is converted into the internal energy (ie, heat energy) of the buffer (ie, liquid or high-pressure gas) in the thin-wall space, thereby reducing the energy converted into noise and further reducing the collision noise.

[0052] Example 4 The embodiment of the present invention provides a folding machine, such as Figure 8-9 As shown, it includes a paper feeding device, a paper folding device and a low-noise paper blocking device in any of the above embodiments.

[0053] The paper feeding device is, for example, a belt conveyor, which includes two paper feeding rollers 4, a belt 5 is wound between the two paper feeding rollers 4, and any one of the paper feeding rollers 4 is driven by a motor. The paper feeding device is used to transport the paper to the paper folding device.

[0054] The paper folding device includes an upper folding roller 6 and two lower folding rollers, the two lower folding rollers are respectively an upstream lower folding roller 7 and a downstream lower folding roller 8, the upper folding roller 6 and the upstream lower folding roller 7 are arranged in an up-and-down manner and are located on the side close to the paper feeding device, and the upper folding roller 6 rotates in the opposite direction to the upstream lower folding roller 7, so as to facilitate the paper to be transported from the paper feeding device to the low-noise paper stopper. The downstream lower folding roller 8 is located on the lower side of the low-noise paper stopper, and the downstream lower folding roller 8 rotates in the opposite direction to the upstream lower folding roller 7.

[0055] The paper 9 is conveyed by the paper feeding device and reaches between the upper folding roller 6 and the upstream lower folding roller 7. Under the friction force of the upper folding roller 6 and the upstream lower folding roller 7, the paper 9 enters the gap between the two folding fences 1. After moving upward, the paper 9 first collides with the paper buffer structure 2, and the kinetic energy of the paper is converted into the elastic potential energy of the spring or the internal energy of the buffer, thereby reducing the collision noise. When the paper 9 stops moving, the tail of the paper continues to move forward under the friction force of the upper folding roller 6 and the upstream lower folding roller 7, but because the paper head has stopped moving, when the paper tail is pushed forward, the paper 9 bends at the gap between the upstream lower folding roller 7 and the downstream lower folding roller 8 (the paper head is constrained by the two folding fences 1, so the front end of the paper 9 cannot bend). After bending, the paper 9 slowly contacts the downstream lower folding roller 8. Under the friction between the downstream lower folding roller 8 and the upstream lower folding roller 7, the paper 9 moves downward through the folding gap to complete a folding.

[0056] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions and variations of these embodiments are made without departing from the principles and spirit of the present invention, and still fall within the scope of protection of the present invention.

Claims

1. A low-noise paper stopper, characterized in that: It includes a folding fence, a paper buffer structure and a buffer adjustment structure; the folding fence includes upper and lower fences arranged in parallel and relatively spaced apart, the paper buffer structure is used to slow down the impact speed of the paper when it moves between the upper and lower fences, and the buffer adjustment structure is used to adjust the position of the paper buffer structure in the direction of paper movement.

2. The low-noise paper stopper according to claim 1, characterized in that: The paper buffer structure comprises a baffle base, a spring and a baffle which are connected in sequence, and the baffle is located on the side facing the paper.

3. The low-noise paper stopper according to claim 2, characterized in that: The baffle is a thin sheet structure.

4. The low-noise paper stopper according to claim 2, characterized in that: A thin sheet is detachably connected to one side of the baffle plate facing the paper.

5. The low-noise paper stopper according to claim 1, characterized in that: The paper buffer structure comprises a base body and a baffle which are connected to each other, wherein the baffle is located on a side facing the paper; wherein the baffle and / or the baffle base has a thin-walled cavity, and the thin-walled cavity is filled with a buffer.

6. The low-noise paper stopper according to claim 5, characterized in that: The buffer is high-pressure gas or liquid.

7. The low-noise paper stopper according to claim 1, characterized in that: The buffer adjustment structure includes a sliding member, a gear, a rack and a positioning member. The sliding member slides relative to the folding fence along the direction of paper movement, and the paper buffer mechanism is fixed on the sliding member. The gear is rotatably connected to the sliding member, and the gear is meshed with the rack. The positioning member is used to control the rotation state of the gear.

8. The low-noise paper stopper according to claim 7, characterized in that: The positioning member includes a card block and a card block driving mechanism. The card block is provided with a tooth profile meshing with the gear. The card block is movably connected relative to the sliding member. The card block driving mechanism is used to control the meshing state between the card block and the gear.

9. The low-noise paper stopper according to claim 7, characterized in that: The buffer adjustment structure further includes a driving member, an output end of which is connected to the sliding member, and the driving member is used to adjust the position of the sliding member; alternatively, the positioning member is replaced by the driving member.

10. A folding machine, characterized in that: It comprises a low-noise paper stopper as described in any one of claims 1 to 9.

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