Lifting hook device for preventing falling of paper pressing roller of rewinding machine and rewinding machine

Abstract

The utility model relates to a rewinding machine and a lifting hook device for preventing a paper pressing roller from falling off, the lifting hook device comprises a lifting hook, the lifting hook comprises a driving part, a hinging part, a swing arm part and a lock hook part, the driving part is arranged at one end of the hinging part, the lock hook part is arranged at the other end of the hinging part through a rocker arm part, and a lengthening position is arranged on the rocker arm part; one end of the telescopic mechanism is hinged to the rewinding machine, and the other end of the telescopic mechanism is hinged to the driving part of the lifting hook; the closing detection unit is arranged at one end of the telescopic mechanism cylinder body; the opening detection unit is arranged at the other end of the telescopic mechanism cylinder body; the lifting lug is internally provided with a lifting groove, the lifting groove of the lifting lug is provided with a lifting lug expanding position, and the lifting lug is arranged on the paper pressing roller. The lifting hook can enter the lifting groove of the lifting lug under the condition that the control precision of the paper pressing roller is not high, and meanwhile, the closing detection unit and the opening detection unit are arranged on the telescopic mechanism, so that the accurate position can be detected.

Description

Technical Field

[0001] This application relates to the field of papermaking technology, specifically to a hook device for preventing the pressure roller of a rewinder from falling off, and a rewinder. Background Technology

[0002] A rewinder is a specialized piece of equipment used for paper, mica tape, and film. Its purpose is to rewind paper rolls (called base rolls) produced by a papermaking machine sequentially, resulting in finished paper products for shipment. In the ACelli-T200S model rewinder, the pressure roller is a crucial component. It plays a vital role in the initial pressing of the paper roll and the tension of the paper. Located in the area of ​​the base roller with frequent movement, the pressure roller's safety hook locking when it reaches its final position is essential for the safety of maintenance and operators.

[0003] However, the pressure roller is hydraulically controlled, making it difficult to ensure that it stays fixed at the upper limit position when it rises. It either exceeds the upper limit or fails to reach it, making it difficult for the hook to be inserted into the groove of the lifting lug on the pressure roller in one go. Furthermore, because the pressure roller's stroke is difficult to control, the original hook closure detection device was installed on the hook itself, with the detection position on the lifting lug. Due to low position control accuracy, it often failed to detect the position, easily leading to control failure and the entire rewinder becoming unusable. Additionally, the upper and highest positions of the pressure roller almost coincide, causing the rod-side chamber of the oil rod to collide with the rodless chamber seal, damaging it, and the screws securing the rod-side chamber frequently loosening. Utility Model Content

[0004] In view of the above problems, this application provides a hook device for preventing the pressure roller of a rewinder from falling off, and a rewinder in general. This solves the problem that in existing rewinders, the closed position detection device of the hook is installed on the hook, while the open position detection device is installed on the lifting lug. However, due to the low position control accuracy, the device is often not detected, which can easily lead to control failure and the entire rewinder becoming unable to operate.

[0005] To achieve the above objectives, the inventors provide a hook device for preventing the pressure roller of a rewinder from falling off, comprising:

[0006] The hook includes a drive unit, a hinge unit, a swing arm unit, and a locking hook unit. The drive unit is located at one end of the hinge unit, and the locking hook unit is located at the other end of the hinge unit via the swing arm unit. The swing arm unit is provided with an extension position. The hook is hinged to a preset height position of the pressure roller body of the rewinder via the hinge unit.

[0007] A telescopic mechanism, one end of which is hinged to the rewinding machine, and the other end of which is hinged to the drive unit of the hook;

[0008] A closure detection unit is disposed at one end of the cylinder of the telescopic mechanism, and the closure detection unit is used to detect whether the telescopic mechanism is closed in place.

[0009] An opening detection unit is provided at the other end of the telescopic mechanism cylinder, and the opening detection unit is used to detect whether the telescopic mechanism is fully opened.

[0010] The lifting lug has a lifting groove inside, and the lifting groove of the lifting lug has an enlarged lifting lug position. The lifting lug is set on the paper pressure roller.

[0011] In some embodiments, the length of the extended position is the distance between the upper limit and the highest position of the travel of the pressure roller.

[0012] In some embodiments, both the closure detection unit and the opening detection unit are proximity switches.

[0013] In some embodiments, the proximity switch is a magnetic proximity switch.

[0014] In some embodiments, the telescopic mechanism is an actuating cylinder.

[0015] Another technical solution is also provided: a rewinder, which includes a pressure roller body and a hook device, the hook device including:

[0016] The hook includes a drive unit, a hinge unit, a swing arm unit, and a locking hook unit. The drive unit is located at one end of the hinge unit, and the locking hook unit is located at the other end of the hinge unit via the swing arm unit. The swing arm unit is provided with an extension position. The hook is hinged to a preset height position of the pressure roller body of the rewinder via the hinge unit.

[0017] A telescopic mechanism, one end of which is hinged to the rewinding machine, and the other end of which is hinged to the drive unit of the hook;

[0018] A closure detection unit is disposed at one end of the cylinder of the telescopic mechanism, and the closure detection unit is used to detect whether the telescopic mechanism is closed in place.

[0019] An opening detection unit is provided at the other end of the telescopic mechanism cylinder, and the opening detection unit is used to detect whether the telescopic mechanism is fully opened.

[0020] The lifting lug has a lifting groove inside, and the lifting groove of the lifting lug has an enlarged lifting lug position. The lifting lug is set on the paper pressure roller.

[0021] In some embodiments, the length of the extended position is the distance between the upper limit and the highest position of the travel of the pressure roller.

[0022] In some embodiments, both the closure detection unit and the opening detection unit are proximity switches.

[0023] In some embodiments, the proximity switch is a magnetic proximity switch.

[0024] In some embodiments, the telescopic mechanism is an actuating cylinder.

[0025] Unlike existing technologies, the above technical solution increases the length of the hook by adding an extended section to the rocker arm between the hook and the hinge. It also increases the length of the lifting lug by adding an enlarged section to the lifting lug slot. Furthermore, a closure detection unit is located at one end of the telescopic mechanism cylinder, and an opening detection unit is located at the other end. Because both the hook and the lifting lug are longer than before, the hook can still enter the lifting lug slot even when the control precision of the pressure roller is not high. Since both the closure and opening detection units are located on the telescopic mechanism, and the opening and retraction positions of the telescopic mechanism are fixed, accurate detection is ensured, preventing control failures that could cause the rewinder to malfunction.

[0026] The above description of the utility model is merely an overview of the technical solution of this application. In order to enable those skilled in the art to better understand the technical solution of this application and to implement it based on the description and drawings, and to make the above-mentioned objectives and other objectives, features and advantages of this application easier to understand, the following description is provided in conjunction with the specific embodiments and drawings of this application. Attached Figure Description

[0027] The accompanying drawings are only used to illustrate the principles, implementation methods, applications, features, and effects of specific embodiments of this application and other related content, and should not be considered as limitations on this application.

[0028] In the accompanying drawings of the instruction manual:

[0029] Figure 1 A schematic diagram of a hook device for preventing the pressure roller of a rewinder from falling off, as described in a specific embodiment;

[0030] Figure 2 A schematic diagram of a structure of the hook described in a specific embodiment;

[0031] Figure 3 This is a schematic diagram of one structure of the original hook described in the specific implementation method;

[0032] Figure 4 This is a schematic diagram of one structure of the original lifting lug described in a specific embodiment;

[0033] Figure 5 This is a structural view of the main body of the pressure roller of the rewinder described in a specific embodiment.

[0034] The reference numerals used in the above figures are explained as follows:

[0035] 100. Lifting hook device

[0036] 110. Lifting hook,

[0037] 111. Drive unit

[0038] 112. Hinge joint,

[0039] 113. Swing arm section,

[0040] 1131. Extended position.

[0041] 114. Locking hook section,

[0042] 120. Telescopic mechanism,

[0043] 130. Close the detection unit.

[0044] 140. Open the detection unit.

[0045] 150. Hanging ear,

[0046] 151. Hanging groove,

[0047] 1511. Enlarged position of the lug.

[0048] 200. Paper pressure roller body;

[0049] 210. Paper pressure roller. Detailed Implementation

[0050] To illustrate the possible application scenarios, technical principles, implementable specific solutions, and achievable objectives and effects of this application in detail, the following description, in conjunction with the listed specific embodiments and accompanying drawings, provides a detailed explanation. The embodiments described herein are merely illustrative of the technical solutions of this application and are therefore intended to limit the scope of protection of this application.

[0051] In this document, the term "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The term "embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment, nor does it specifically limit its independence or connection with other embodiments. In principle, in this application, as long as there are no technical contradictions or conflicts, the technical features mentioned in each embodiment can be combined in any way to form corresponding implementable technical solutions.

[0052] Unless otherwise defined, the technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the use of related terms herein is merely for the purpose of describing particular embodiments and is not intended to limit this application.

[0053] In the description of this application, the term "and / or" is used to describe the logical relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A exists, B exists, and A and B exist simultaneously. Additionally, the character " / " in this document generally indicates that the preceding and following objects have an "or" logical relationship.

[0054] In this application, terms such as “first” and “second” are used only to distinguish one entity or operation from another, and do not necessarily require or imply any actual quantity, hierarchy or order relationship between these entities or operations.

[0055] Unless otherwise specified, the use of terms such as “comprising,” “including,” “having,” or other similar expressions in this application is intended to cover non-exclusive inclusion, which does not exclude the presence of additional elements in a process, method, or product that includes the stated elements, such that a process, method, or product that includes a list of elements may include not only those defined elements but also other elements not expressly listed, or elements inherent to such a process, method, or product.

[0056] Similar to the understanding in the Examination Guidelines, in this application, expressions such as "greater than," "less than," and "exceeding" are understood to exclude the stated number; expressions such as "above," "below," and "within" are understood to include the stated number. Furthermore, in the description of the embodiments in this application, "multiple" means two or more (including two), and similar expressions related to "multiple" are also understood in this way, such as "multiple groups" and "multiple times," unless otherwise explicitly specified.

[0057] In the description of the embodiments of this application, the space-related expressions used, such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "vertical," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," indicate the orientation or positional relationship based on the orientation or positional relationship shown in the specific embodiments or drawings. They are only for the purpose of describing the specific embodiments of this application or for the reader's understanding, and do not indicate or imply that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0058] Unless otherwise expressly specified or limited, the terms "installation," "connection," "linking," "fixing," and "setting," as used in the description of the embodiments of this application, should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two components or the interaction between two components. For those skilled in the art to which this application pertains, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0059] Please see Figure 1-5 This embodiment provides a hook device 100 for preventing the pressure roller 210 of a rewinder from falling off, comprising:

[0060] The hook 110 includes a drive part 111, a hinge part 112, a swing arm part 113, and a locking hook part 114. The drive part 111 is disposed at one end of the hinge part 112, and the locking hook is disposed at the other end of the hinge part 112 via the swing arm part. The swing arm part is provided with an extension position 1131. The hook 110 is hinged to a preset height position of the pressure roller body 200 of the rewinder via the hinge part 112.

[0061] Telescopic mechanism 120, one end of which is hinged to the rewinding machine, and the other end of which is hinged to the drive part 111 of the hook 110;

[0062] A closure detection unit 130 is disposed at one end of the cylinder of the telescopic mechanism 120, and the closure detection unit 130 is used to detect whether the telescopic mechanism 120 is closed in place;

[0063] The opening detection unit 140 is located at the other end of the cylinder of the telescopic mechanism 120 and is used to detect whether the telescopic mechanism 120 is fully opened.

[0064] The lifting lug 150 has a lifting groove 151 inside, and the lifting groove 151 of the lifting lug 150 has a lifting lug enlargement position 1511. The lifting lug 150 is set on the paper pressure roller 210.

[0065] By adding an extension portion 1131 to the rocker arm portion between the locking hook and the hinge portion 112 of the hook 110 compared to the previous locking hook, please refer to [link to relevant documentation]. Figure 2-3Compared to the original hook 110, the length of the hook 110 in this application has been increased. At the same time, an enlarged lifting lug 1511 has been added to the lifting groove 151 of the lifting lug 150, increasing the length of the lifting lug 150. The closure detection unit 130 is set at one end of the cylinder of the telescopic mechanism 120, and the opening detection unit 140 is set at the other end of the cylinder of the telescopic mechanism 120. Since the length of the hook 110 and the lifting lug 150 have both been increased, it is ensured that the hook 110 can enter the lifting groove 151 of the lifting lug 150 even when the control accuracy of the pressure roller 210 is not high. The closure detection unit 130 and the opening detection unit 140 are both set on the telescopic mechanism 120. The opening and retracting positions of the telescopic mechanism 120 are fixed, which can ensure accurate detection and avoid the situation where the rewinder cannot operate due to control failure.

[0066] The working principle of the specific hook device 100 is as follows:

[0067] The opening and retraction of the telescopic mechanism 120 will drive the drive unit 111 on the hook 110 to move. The movement of the drive unit 111 will cause the locking hook to extend and retract around the hinge 112, thereby realizing the opening and closing of the hook 110 to the lifting lug 150. When the telescopic mechanism 120 drives the drive unit 111 to move, the locking hook of the hook 110 will enter the lifting groove 151 of the lifting lug 150, realizing the closing action of the hook 110. When the telescopic mechanism 120 drives the drive unit 111 to move, the locking hook of the hook 110 will retract from the lifting groove 151 of the lifting lug 150, realizing the opening action of the hook 110. When the telescopic mechanism 120 opens or retracts, the stroke of its telescopic rod will change. The opening detection unit 140 and the closing detection unit 130 can detect whether the telescopic mechanism 120 is fully opened or fully closed based on the stroke of the telescopic rod, thereby realizing the detection of whether the opening action and closing action of the hook 110 are fully completed. When it is necessary to lock the pressure roller 210, the pressure roller 210 is raised to a preset position, and the hook 110 is driven into the lifting groove 151 of the lifting lug 150 by the telescopic mechanism 120; when it is necessary to release the pressure roller 210, the hook 110 is driven out of the lifting groove 151 of the lifting lug 150 by the telescopic mechanism 120.

[0068] Specifically, the telescopic mechanism 120 can be set to open when it opens, and close when it retracts. By setting the closure detection unit 130 at a preset distance from the bottom of the telescopic mechanism 120, the opening action stops when the rod chamber of the telescopic mechanism 120 is almost at its lowest position, preventing impact on the bottom of the rod chamber, reducing the risk of damage to the sealing ring, and preventing the fixing screws from loosening, thus reducing maintenance costs.

[0069] In some embodiments, the length of the extension position 1131 is the distance between the upper limit and the highest point of the travel of the pressure roller 210. By setting the length of the extension position 1131 to the distance between the upper limit and the highest point of the travel of the pressure roller 210, it is ensured that even when the control precision of the pressure roller 210 is not high, the hook 110 can still enter the lifting lug 150.

[0070] In some embodiments, both the closure detection unit 130 and the opening detection unit 140 are proximity switches. The closure detection unit 130 and the opening unit employ proximity switches, which are position switches that can be operated without direct mechanical contact with moving parts. When an object approaches the sensing surface of the switch to the operating distance, the switch can be activated without mechanical contact or pressure, thereby driving DC electrical appliances or providing control commands to a computer (PLC) device. A proximity switch is a type of switch-type sensor (i.e., a contactless switch). It possesses the characteristics of limit switches and microswitches, while also having sensing capabilities. It is reliable, stable, has a fast frequency response, long service life, strong anti-interference ability, and is waterproof, shockproof, and corrosion-resistant. In some cases, the proximity switch is a magnetic proximity switch. A magnetic proximity switch utilizes the eddy currents generated inside the object when a conductive object approaches it, which generates an electromagnetic field. This eddy current reacts to the proximity switch, causing changes in the internal circuit parameters, thereby identifying the presence or absence of a conductive object and controlling the switch's on / off state. The telescopic rod of the telescopic mechanism 120 is made of a conductive metal material. In other embodiments, the proximity switch may also be a capacitive proximity switch.

[0071] In some embodiments, the telescopic mechanism 120 is an actuating cylinder. A cylinder is a cylindrical metal component that guides a piston to perform linear reciprocating motion within the cylinder. In an engine cylinder, air expands, converting thermal energy into mechanical energy; in a compressor cylinder, gas is compressed by a piston, increasing its pressure. In other embodiments, the telescopic mechanism 120 may also be an electric push rod or a hydraulic cylinder, etc.

[0072] Please see Figure 1-5 In another embodiment, a rewinder includes a hook device 100 and a pressure roller body 200, the hook device 100 comprising:

[0073] The hook 110 includes a drive part 111, a hinge part 112, a swing arm part 113, and a locking hook part 114. The drive part 111 is located at one end of the hinge part 112, and the locking hook is located at the other end of the hinge part 112 via the swing arm part. The swing arm part is provided with an extension position 1131. The hook 110 is hinged to the rewinder's pressure roller body 200 at a preset height position via the hinge part 112, that is, the hook is located at a preset distance above the pressure roller 210 in the pressure roller body 200.

[0074] Telescopic mechanism 120, one end of which is hinged to the rewinding machine, and the other end of which is hinged to the drive part 111 of the hook 110;

[0075] A closure detection unit 130 is disposed at one end of the cylinder of the telescopic mechanism 120, and the closure detection unit 130 is used to detect whether the telescopic mechanism 120 is closed in place;

[0076] The opening detection unit 140 is located at the other end of the cylinder of the telescopic mechanism 120 and is used to detect whether the telescopic mechanism 120 is fully opened.

[0077] The lifting lug 150 has a lifting groove 151 inside, and the lifting groove 151 of the lifting lug 150 has a lifting lug enlargement position 1511. The lifting lug 150 is set on the paper pressure roller 210.

[0078] By adding an extension section 1131 to the rocker arm between the locking hook and the hinge section 112 of the hook 110, the length of the hook 110 is increased. At the same time, an enlarged lifting section 1511 is added to the lifting groove 151 of the lifting lug 150, increasing the length of the lifting lug 150. Meanwhile, the closure detection unit 130 is set at one end of the cylinder of the telescopic mechanism 120, and the opening detection unit 140 is set at the other end of the cylinder of the telescopic mechanism 120. Since the length of the hook 110 and the lifting lug 150 have both increased by a certain length, it is ensured that the hook 110 can enter the lifting groove 151 of the lifting lug 150 even when the control accuracy of the pressure roller 210 is not high. At the same time, the closure detection unit 130 and the opening detection unit 140 are both set on the telescopic mechanism 120. The opening and retracting positions of the telescopic mechanism 120 are fixed, which can ensure accurate detection positions and avoid the situation where the rewinder cannot operate due to control failure.

[0079] The working principle of the specific hook device 100 is as follows:

[0080] The opening and retraction of the telescopic mechanism 120 will drive the drive unit 111 on the hook 110 to move. The movement of the drive unit 111 will cause the locking hook to extend and retract around the hinge 112, thereby realizing the opening and closing of the hook 110 to the lifting lug 150. When the telescopic mechanism 120 drives the drive unit 111 to move, the locking hook of the hook 110 will enter the lifting groove 151 of the lifting lug 150, realizing the closing action of the hook 110. When the telescopic mechanism 120 drives the drive unit 111 to move, the locking hook of the hook 110 will retract from the lifting groove 151 of the lifting lug 150, realizing the opening action of the hook 110. When the telescopic mechanism 120 opens or retracts, the stroke of its telescopic rod will change. The opening detection unit 140 and the closing detection unit 130 can detect whether the telescopic mechanism 120 is fully opened or fully closed based on the stroke of the telescopic rod, thereby realizing the detection of whether the opening action and closing action of the hook 110 are fully completed. When it is necessary to lock the pressure roller 210, the pressure roller 210 is raised to a preset position, and the hook 110 is driven into the lifting groove 151 of the lifting lug 150 by the telescopic mechanism 120; when it is necessary to release the pressure roller 210, the hook 110 is driven out of the lifting groove 151 of the lifting lug 150 by the telescopic mechanism 120.

[0081] In some embodiments, the length of the extension position 1131 is the distance between the upper limit and the highest point of the travel of the pressure roller 210. By setting the length of the extension position 1131 to the distance between the upper limit and the highest point of the travel of the pressure roller 210, it is ensured that even when the control precision of the pressure roller 210 is not high, the hook 110 can still enter the lifting lug 150.

[0082] In some embodiments, both the closure detection unit 130 and the opening detection unit 140 are proximity switches. The closure detection unit 130 and the opening unit employ proximity switches, which are position switches that can be operated without direct mechanical contact with moving parts. When an object approaches the sensing surface of the switch to the operating distance, the switch can be activated without mechanical contact or pressure, thereby driving DC electrical appliances or providing control commands to a computer (PLC) device. A proximity switch is a type of switch-type sensor (i.e., a contactless switch). It possesses the characteristics of limit switches and microswitches, while also having sensing capabilities. It is reliable, stable, has a fast frequency response, long service life, strong anti-interference ability, and is waterproof, shockproof, and corrosion-resistant. In some cases, the proximity switch is a magnetic proximity switch. A magnetic proximity switch utilizes the eddy currents generated inside the object when a conductive object approaches it, which generates an electromagnetic field. This eddy current reacts to the proximity switch, causing changes in the internal circuit parameters, thereby identifying the presence or absence of a conductive object and controlling the switch's on / off state. The telescopic rod of the telescopic mechanism 120 is made of a conductive metal material. In other embodiments, the proximity switch may also be a capacitive proximity switch.

[0083] In some embodiments, the telescopic mechanism 120 is an actuating cylinder. A cylinder is a cylindrical metal component that guides a piston to perform linear reciprocating motion within the cylinder. In an engine cylinder, air expands, converting thermal energy into mechanical energy; in a compressor cylinder, gas is compressed by a piston, increasing its pressure. In other embodiments, the telescopic mechanism 120 may also be an electric push rod or a hydraulic cylinder, etc.

[0084] In some embodiments, the rewinder pressure roller 210 operates as follows:

[0085] 1. When the pressure roller 210 is at its lowest position: the stroke is less than or equal to the lower limit of 125mm, and the pressure of the pressure roller 210 is set to 45.0 bar and is in a stationary state.

[0086] 2. When the pressure roller 210 is pressed up: the stroke is between the lower limit of 125mm and the slow upper limit of 2450mm. At this time, the pressure of the pressure roller 210 is set to 66.0 bar, and the pressure roller 210 rises rapidly.

[0087] 3. When the travel of the pressure roller 210 is between the slow upper position of 2450mm and the upper limit of 2665mm, the set pressure of the pressure roller 210 is 55.0 bar, and the pressure roller 210 rises slowly.

[0088] 4. When the travel of the pressure roller 210 is at the upper limit of 2665mm or exceeds the upper limit by about 10mm, it may exceed the limit slightly because the hydraulic stroke position is difficult to control. At this time, the pressure of the pressure roller 210 is set to 45.0 bar, and the pressure roller 210 is in a stationary state. After a delay of 500ms, the hook 110 is hooked into the lifting lug 150, and the magnetic switch on the cylinder detects the closed position to prevent the pressure roller 210 from falling.

[0089] 5. When the descent button is pressed, the pressure roller 210 first executes the slow upward command because sometimes after the oil station is turned off, the pressure roller 210 will be depressurized, causing it to slowly fall until the hook 110 catches it. Raising it slightly can prevent the hook 110 from being stuck by the pressure roller 210 and unable to open. The pressure roller 210 rises 1cm to 2cm in about 450ms, and the hook 110 opens at the same time. When the magnetic switch of the cylinder that opens the hook 110 detects the opening, the pressure roller 210 switches to 25.0 bar before descending rapidly.

[0090] 6. When the travel of the pressure roller 210 is 400mm, the pressure of the pressure roller 210 is set to 39.0 bar. The pressure roller 210 descends slowly to prevent it from hitting the bottom roller at once.

[0091] 7. When the travel of the pressure roller 210 is 125mm, the pressure of the pressure roller 210 is set to 45.0 bar and it is in a stationary state.

[0092] The hook 110 is lengthened by 10cm and the lifting lug 150 of the paper pressure roller 210 is enlarged by 8cm, such as Figure 2 , 3 As shown, this 10cm length is the distance between the upper limit and the highest position. Previously, the upper limit and the highest position of the pressure roller 210 almost overlapped. At the same time, when performing step 5, a slow upward movement is performed before descending to prevent the hook from jamming.

[0093] Compared to the previous solution, where the proximity switch for closed-position detection was installed on the hook 110 and the detection position was installed on the lifting lug 150, the position was difficult to control and the accuracy was not high, so it was often not detected. Now, the detection position is placed at the end of the cylinder's stroke, and the opening and closing positions of the cylinder are fixed, which can ensure accurate detection position.

[0094] By lengthening the hook 110 and enlarging the hole of the lifting lug 150, the hook 110 can be smoothly hooked into the lifting lug 150, reducing downtime for maintenance and improving the operating efficiency of the rewinding machine.

[0095] Simultaneously setting the positions of the closing detection unit 130 and the opening detection unit 140 on the cylinder body of the actuating cylinder ensures that when the telescopic mechanism 120 drives the hook 110, the rod chamber moves quickly to the lowest position without impacting the bottom of the rod chamber, the sealing ring is less likely to be damaged, and the fixing screws are less likely to loosen.

[0096] Finally, it should be noted that although the above embodiments have been described in the text and drawings of this application, this should not limit the scope of patent protection of this application. Any technical solutions that are based on the essential concept of this application and utilize the content described in the text and drawings of this application, resulting in equivalent structural or procedural substitutions or modifications, as well as the direct or indirect application of the technical solutions of the above embodiments to other related technical fields, are all included within the scope of patent protection of this application.

Claims

1. A hook device for preventing a paper pressing roller from falling in a rewinder, characterized by, The hook device comprises: a hook, the hook comprising a driving part, a hinged part, a swing arm part and a locking hook part, the driving part being arranged at one end of the hinged part, the locking hook being arranged at the other end of the hinged part through the swing arm part, the swing arm part being provided with an extension position, the hook being hinged to a preset height position of a paper roller main body of the rewinding machine through the hinged part; a telescopic mechanism, one end of the telescopic mechanism being hinged to the rewinding machine, the other end of the telescopic mechanism being hinged to the driving part of the hook; a closing detection unit, the closing detection unit being arranged at one end of a cylinder body of the telescopic mechanism, the closing detection unit being used for detecting whether the telescopic mechanism is closed to position; an opening detection unit, the opening detection unit being arranged at the other end of the cylinder body of the telescopic mechanism, the opening detection unit being used for detecting whether the telescopic mechanism is opened to position; a lifting lug, the lifting lug being provided with a lifting groove, the lifting groove of the lifting lug being provided with a lifting lug expansion position, the lifting lug being arranged on the paper roller.

2. The hook device for preventing the drop of the platen roller of a rewinding machine according to claim 1, characterized by, The length of the extension position is the distance between the upper limit position and the highest position of the stroke of the paper roller.

3. The hook device for preventing the drop of the platen roller of a rewinding machine according to claim 1, characterized in that, The closing detection unit and the opening detection unit are both proximity switches.

4. The hook device for preventing the drop of the platen roller of a rewinding machine according to claim 3, characterized in that, The proximity switch is a magnetic proximity switch.

5. The hook device for preventing the drop of the platen roller of a rewinding machine according to claim 1, characterized in that, The telescopic mechanism is an action cylinder.

6. A rewinding machine comprising a platen main body and a hanger device, characterized by The hook device comprises: a hook, the hook comprising a driving part, a hinged part, a swing arm part and a locking hook part, the driving part being arranged at one end of the hinged part, the locking hook being arranged at the other end of the hinged part through the swing arm part, the swing arm part being provided with an extension position, the hook being hinged to a preset height position of a paper roller main body of the rewinding machine through the hinged part; a telescopic mechanism, one end of the telescopic mechanism being hinged to the rewinding machine, the other end of the telescopic mechanism being hinged to the driving part of the hook; a closing detection unit, the closing detection unit being arranged at one end of a cylinder body of the telescopic mechanism, the closing detection unit being used for detecting whether the telescopic mechanism is closed to position; an opening detection unit, the opening detection unit being arranged at the other end of the cylinder body of the telescopic mechanism, the opening detection unit being used for detecting whether the telescopic mechanism is opened to position; a lifting lug, the lifting lug being provided with a lifting groove, the lifting groove of the lifting lug being provided with a lifting lug expansion position, the lifting lug being arranged on the paper roller.

7. The rewinder according to claim 6, characterized in that The length of the extension position is the distance between the upper limit position and the highest position of the stroke of the paper roller.

8. The rewinder according to claim 6, characterized in that The closing detection unit and the opening detection unit are both proximity switches.

9. The rewinder according to claim 8, characterized in that The proximity switch is a magnetic proximity switch.

10. The rewinder according to claim 6, characterized in that, The telescopic mechanism is an action cylinder.

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