Material limiting mechanism of rewinding machine

Abstract

The invention relates to a material limiting mechanism of a rewinding machine, which relates to the technical field of roll paper production equipment, and comprises a rack, a winding roller, a metering assembly, a cutting assembly and a connecting assembly, a rotating frame is rotationally arranged on the rack; a first motor is fixedly arranged on the rack; the winding roller is rotationally arranged on the rotating frame; a winding drum is fixedly arranged on the winding roller; a second motor is fixedly arranged on the rack; the metering assembly comprises a driving gear and a driven gear; the driving gear is coaxially and fixedly connected with an output shaft of the second motor; the driven gear is rotationally arranged on the rack; the cutting assembly is arranged on the rack and used for cutting off a paper tape and fixing the cut-off paper tape; the connecting assembly is arranged on the rack and used for adjusting the connecting state of the second motor and the winding roller. The paper tape can be automatically cut off, the winding drum can be automatically replaced, and therefore paper roll production is facilitated.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of paper roll production equipment, in particular to a rewinding machine material limiting mechanism. BACKGROUND

[0002] The rewinding machine is a special equipment for the production of paper and other strip materials, which is used to rewind the raw paper roll produced by the paper machine to obtain high-quality paper roll products.

[0003] At present, when the rewinding machine is in use, the length of the paper tape wound on the winding drum needs to be measured manually. When the paper roll winding is completed, the paper tape is cut off manually, then the winding drum is replaced, the paper tape is fixed with the new winding drum, and then the production of the paper roll is continued.

[0004] In the above-mentioned paper roll production process, the manual cutting of the paper tape and the replacement of the winding drum often exist the situation of not timely cutting or cutting too early, which leads to the length of the produced paper tape being different, and subsequent rework is needed, which brings great inconvenience to the production of the paper roll. SUMMARY

[0005] In order to automatically cut the paper tape and replace the winding drum, thereby facilitating the production of the paper roll, the present application provides a rewinding machine material limiting mechanism.

[0006] The rewinding machine material limiting mechanism provided by the present application adopts the following technical scheme: A rewinding machine material limiting mechanism, comprising a rack, a winding roller, a metering assembly, a cutting assembly and a connecting assembly; a rotating frame is rotatably arranged on the rack; a first motor is fixedly arranged on the rack, and the first motor is used to drive the rotating frame to rotate; at least two winding rollers are arranged, and each winding roller is rotatably arranged on the rotating frame; a winding drum is fixedly arranged on the winding roller, and a rubber strip is arranged on the winding drum; a second motor is fixedly arranged on the rack, and the second motor is used to drive the winding roller to rotate; the metering assembly comprises a driving gear and a driven gear; the driving gear is an incomplete gear, and the driving gear is coaxially and fixedly connected with the output shaft of the second motor; the driven gear is rotatably arranged on the rack, and the driven gear is engaged with the driving gear; the cutting assembly is arranged on the rack, and is used to cut the paper tape and fix the cut paper tape; the connecting assembly is arranged on the rack, and is used to adjust the connection state of the second motor and the winding roller.

[0007] By adopting the above technical scheme, when the paper roll is produced, the paper tape produced by the paper machine in the previous process is adhered to the winding drum through the adhesive tape, the winding roller is driven to rotate by the second motor, so that the winding drum is driven to rotate, the paper tape is wound on the winding drum, the driving gear rotates together with the second motor, when the second motor rotates a certain number of turns, that is, a predetermined amount of paper tape is wound on the winding drum, at this time, the driving gear drives the driven gear to rotate by a certain angle, the paper tape is cut off by the cutting assembly, and the cut paper tape is adhered and fixed, then the second motor is disconnected with the winding roller through the connecting assembly, the rotating frame is driven to rotate by the first motor, the winding roller is replaced, after the winding roller is replaced, the second motor is connected with the new winding roller through the connecting assembly, automatic cutting of the paper tape and replacement of the winding drum are realized, the accuracy of the paper tape cutting time and the length of the paper tape wound on the paper roll are ensured, and rework is avoided, thereby facilitating the production of the paper roll.

[0008] Optionally, the cutting assembly comprises a mounting block, a cutting roller, a third motor and a cutter; the mounting block is slidingly arranged on the rack; the cutting roller is rotationally connected with the mounting block, and the cutting roller is also provided with an adhesive tape; the third motor is used to drive the cutting roller to rotate; the cutter is fixedly arranged on the cutting roller; the rack is provided with a transmission assembly, which is used to transmit the rotation of the driven gear to the mounting block and drive the mounting block to slide; the rack is provided with a control assembly, which is used to control the working state of the third motor.

[0009] By adopting the above technical scheme, when the paper tape is cut, the rotation of the driven gear is transmitted to the mounting block through the transmission assembly, and the mounting block is driven to slide, thereby driving the cutting roller to slide, when a predetermined amount of paper tape is wound on the paper roll, the cutting roller abuts against the paper tape, the paper tape is adhered to the cutting roller under the action of the adhesive tape on the cutting roller, then the third motor is started by the control assembly, the cutting roller is driven to rotate, thereby driving the cutter to rotate, and the paper tape is cut off, thereby realizing automatic cutting of the paper tape and fixing of the cutting roller.

[0010] Optionally, the transmission assembly comprises a crank, a connecting rod and a sliding block; the crank is fixedly connected with the driven gear; one end of the connecting rod is hingedly connected with the crank; a sliding groove is formed in the rack; the sliding block is slidingly arranged in the sliding groove, and the other end of the connecting rod away from the crank is hingedly connected with the sliding block.

[0011] By adopting the above technical scheme, the crank, the connecting rod and the sliding block jointly constitute a matched crank and sliding block mechanism, thereby realizing transmission of the rotation of the driven gear to the sliding block and driving the sliding block to reciprocate.

[0012] Optionally, the control assembly comprises a displacement sensor and a controller; the displacement sensor is fixedly arranged in the sliding groove, and is configured to detect position information of the sliding block and convert the position information into a position signal input to the controller; the controller is fixedly arranged on the rack, and is electrically connected with the displacement sensor and the third motor, and is configured to receive the position signal transmitted by the displacement sensor and control an operating state of the third motor.

[0013] By adopting the above technical scheme, during the sliding of the sliding block, the displacement sensor is always in an operating state, and the distance between the sliding block and the displacement sensor is detected; when it is detected that the distance between the sliding block and the displacement sensor gradually decreases and reaches a preset value, at this time, a preset amount of paper tape is wound on the winding drum, and the controller controls the third motor to rotate, so as to drive the cutting roller to rotate and cut the paper tape.

[0014] Optionally, the connecting assembly comprises a first electric push rod and a connecting key; the fixed end of the first electric push rod is coaxially fixedly connected with the output shaft of the second motor; the winding roller has a tubular structure, and a key groove is formed in the winding roller; the connecting key is fixedly arranged on the movable end of the first electric push rod, and is matched with the key groove; the controller is electrically connected with the first electric push rod and the first motor, and is further configured to control operating states of the first electric push rod and the first motor.

[0015] By adopting the above technical scheme, when it is needed to disconnect the second motor from the winding roller, the first electric push rod is retracted, so as to drive the connecting key to slide away from the winding roller, so that the second motor is disconnected from the winding roller; when the second motor rotates, the winding roller cannot be driven to rotate. When the roller replacement is completed, the first electric push rod is extended, the movable end of the first electric push rod is inserted into the inner hole of the winding roller, and the connecting key is inserted into the key groove during the extension, so that the output shaft of the second motor is connected with the winding roller; when the second motor is started, the winding roller can be driven to rotate, so that the connection state of the second motor and the winding roller is adjusted.

[0016] Optionally, the connecting key is fixedly arranged on the top of the movable end of the first electric push rod; a counterweight is fixedly arranged on the winding roller, and the counterweight is located on the side of the winding roller away from the key groove.

[0017] By adopting the above technical scheme, when the roller is replaced, during the rotation of the rotating frame, the new winding roller on the rotating frame is under the gravity of the counterweight, the counterweight is located at the bottom of the winding roller, and the key groove is always located at the top of the winding roller; therefore, when the first electric push rod is extended, the connecting key can be inserted into the key groove.

[0018] Optionally, the second electric push rod is arranged on the rack, and at least two second electric push rods are arranged, the fixed end of the second electric push rod is fixedly connected with the rotating frame, the movable end of the second electric push rod is arranged in the winding roller, the winding roller and the movable end of the second electric push rod can rotate relative to each other, the second electric push rod is electrically connected with the controller, and the controller is further used for controlling the working state of the second electric push rod.

[0019] By adopting the technical scheme, when in use, the winding roller is sleeved on the movable end of the second electric push rod, so that the winding roller can rotate relative to the rotating frame. When the winding roller needs to be unloaded after the production of the paper roll is completed, the controller controls the second electric push rod to retract, the movable end of the second electric push rod moves away from the winding roller, the winding roller is separated from the second electric push rod, and the winding roller falls to the bottom of the rack, thereby achieving automatic unloading of the paper roll.

[0020] Optionally, an upper roller mechanical arm is fixedly arranged on the rack, and the upper roller mechanical arm is used for arranging the winding roller on the movable end of the second electric push rod. The upper roller mechanical arm is electrically connected with the controller, and the controller is further used for controlling the working state of the upper roller mechanical arm.

[0021] By adopting the technical scheme, the winding roller is lifted by the upper roller mechanical arm, and then is moved to the position of the second electric push rod. The controller controls the second electric push rod to retract, the upper roller mechanical arm places the winding roller at the coaxial position of the second electric push rod, and then controls the second electric push rod to extend, so that the movable end of the second electric push rod is inserted into the inner hole of the winding roller, thereby achieving automatic winding of the winding roller.

[0022] In summary, the present application has at least one of the following beneficial technical effects: By arranging the metering assembly, the cutting assembly and the connecting assembly, automatic cutting of the paper tape and replacement of the winding drum are achieved, the accuracy of the paper tape cutting time and the length of the paper tape wound on the winding drum are ensured, rework is avoided, and the production of the paper roll is facilitated. By arranging the second electric push rod, when the production of the paper roll is completed, the controller controls the second electric push rod to retract, so that the winding roller is separated from the second electric push rod, and the winding roller falls to the bottom of the rack, thereby achieving automatic unloading of the paper roll. By arranging the upper roller mechanical arm, the winding roller is lifted by the upper roller mechanical arm, and then is moved to the position of the second electric push rod. The controller controls the second electric push rod to retract, the upper roller mechanical arm places the winding roller at the coaxial position of the second electric push rod, and then controls the second electric push rod to extend, so that the movable end of the second electric push rod is inserted into the inner hole of the winding roller, thereby achieving automatic winding of the winding roller. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1is a sectional view of the winding roller shown by the embodiment of the present application; Figure 2 is a schematic diagram of the structure of the first motor shown by the embodiment of the present application; Figure 3 is a schematic diagram of the structure of the third motor shown by the embodiment of the present application; Figure 4 is a sectional view of the first electric push rod shown by the embodiment of the present application.

[0024] Legend of reference signs: 1, frame; 11, rotating frame; 111, first end portion; 112, second end portion; 113, third end portion; 12, first motor; 13, second motor; 14, sliding slot; 15, second electric push rod; 16, upper roller manipulator; 2, winding roller; 21, winding drum; 22, key groove; 23, counterweight; 3, metering assembly; 31, driving gear; 32, driven gear; 4, cutting assembly; 41, mounting block; 42, cutting roller; 43, third motor; 44, cutting knife; 5, connecting assembly; 51, first electric push rod; 52, connecting key; 6, transmission assembly; 61, crank; 62, connecting rod; 63, sliding block; 7, control assembly; 71, displacement sensor; 72, controller. DETAILED DESCRIPTION

[0025] The following will be described in detail below with reference to the accompanying drawings Figures 1-4 The present application will be described in further detail.

[0026] The embodiment of the present application discloses a material limiting mechanism of a rewinding machine. Referring to Figure 1 and Figure 2 The material limiting mechanism of the rewinding machine comprises a frame 1 and a winding roller 2, the frame 1 is provided with a rotating frame 11, the rotating frame 11 is composed of two Y-shaped plates and a rotating shaft, the two Y-shaped plates are fixedly arranged at two ends of the rotating shaft, the rotating frame 11 is rotationally connected with the frame 1, and the rotating axis is horizontally arranged. The three end portions of the Y-shaped plate are a first end portion 111, a second end portion 112 and a third end portion 113 respectively. The frame 1 is fixedly provided with a first motor 12, the output shaft of the first motor 12 is arranged on the frame 1, and is fixedly connected with the rotating shaft of the rotating frame 11 coaxially.

[0027] Referring to Figure 1 and Figure 3The three ends of the Y-shaped plate of the rotating frame 11 are provided with through holes. The rack 1 is provided with second electric push rods 15, and the second electric push rods 15 are three in number. The second electric push rods 15 correspond to the three ends of the Y-shaped plate of the rotating frame 11 one by one, and the second electric push rods 15 are horizontally arranged. The fixed end of the second electric push rod 15 is fixedly connected with the rotating frame 11, and the movable end of the second electric push rod 15 is inserted into the roll 2.

[0028] Referring to Figure 1 The roll 2 is in a tubular structure, and a key groove 22 is formed in the roll 2 and communicates with the inner hole of the roll 2. A counterweight 23 is fixedly arranged in the roll 2 and located on the side of the roll 2 away from the key groove 22. A winding drum 21 is fixedly arranged on the roll 2, and the winding drum 21 is provided with a rubber strip.

[0029] Referring to Figure 2 The rack 1 is fixedly provided with a second motor 13, and the second motor 13 is used to drive the roll 2 to rotate.

[0030] Referring to Figure 4 The rack 1 is provided with a connecting assembly 5, and the connecting assembly 5 comprises a first electric push rod 51 and a connecting key 52. The fixed end of the first electric push rod 51 is rotatably arranged in the rack 1 and coaxially fixedly connected with the output shaft of the second motor 13. The movable end of the first electric push rod 51 penetrates the rack 1. The connecting key 52 is fixedly arranged on the top of the movable end of the first electric push rod 51, and the connecting key 52 is used in cooperation with the key groove 22. The three ends of the Y-shaped plate close to the first motor 12 and the rack 1 are also provided with key grooves 22.

[0031] Initially, the second electric push rod 15 on the first end 111 is in an extended state, and the movable end of the second electric push rod 15 is sleeved with the roll 2. When the paper roll is produced, the first motor 12 is used to drive the rotating frame 11 to rotate, so that the roll 2 on the first end 111 is coaxially arranged with the output shaft of the second motor 13. Then, the operator starts the first electric push rod 51 to extend the first electric push rod 51. The movable end of the first electric push rod 51 penetrates the inner hole of the roll 2, the connecting key 52 is located in the key groove 22 on the roll 2, and the second motor 13 is fixedly connected with the roll 2 on the first end 111. It should be noted that under the action of the gravity of the counterweight 23 on the roll 2, no matter how the rotating frame 11 rotates, the counterweight 23 is always located at the bottom of the roll 2, and the key groove 22 is always located at the top of the roll 2. Therefore, when the first electric push rod 51 is extended, the connecting key 52 can penetrate the key groove 22.

[0032] After the second motor 13 is fixedly connected with the winding roller 2 on the first end part 111, the second motor 13 is started, the first electric push rod 51 is driven to rotate by the second motor 13, the winding roller 2 on the first end part 111 is driven to rotate by the connecting key 52, and the winding drum 21 is driven to rotate, so that the paper tape produced by the paper machine is fixed on the winding drum 21 by the adhesive tape, and the winding drum 21 rotates to wind the paper tape on the winding drum 21.

[0033] With reference to Figure 2 and Figure 4 , the rack 1 is provided with a metering assembly 3, and the metering assembly 3 comprises a driving gear 31 and a driven gear 32. The driving gear 31 is an incomplete gear, and the driving gear 31 is coaxially and fixedly connected with the output shaft of the second motor 13. The driven gear 32 is located at the top of the driving gear 31, and the driven gear 32 is rotationally connected with the rack 1, and the rotation axis is parallel to the output shaft axis of the second motor 13. The driven gear 32 is a complete gear, and the driven gear 32 is engaged with the driving gear 31.

[0034] With reference to Figure 1 and Figure 3 , the rack 1 is provided with a cutting assembly 4, and the cutting assembly 4 comprises a mounting block 41, a cutting roller 42, a third motor 43 and a cutting knife 44. The mounting block 41 is slidingly arranged on the rack 1, and the sliding axis is horizontally arranged. The cutting roller 42 is rotationally arranged on the mounting block 41, and the axis of the cutting roller 42 is parallel to the output shaft axis of the second motor 13. The cutting roller 42 is also provided with an adhesive tape. The third motor 43 is fixedly arranged on the mounting block 41, and the output shaft of the third motor 43 is coaxially and fixedly connected with the cutting roller 42. The cutting knife 44 is fixedly arranged on the cutting roller 42.

[0035] With reference to Figure 2 and Figure 3 , the rack 1 is provided with a transmission assembly 6, and the transmission assembly 6 comprises a crank 61, a connecting rod 62 and a sliding block 63. One end of the crank 61 is fixedly connected with the driven gear 32. One end of the connecting rod 62 is hingedly connected with the crank 61, and the hinge axis is parallel to the rotation axis of the driven gear 32. A sliding groove 14 is formed in the rack 1, and the sliding block 63 is slidingly arranged in the sliding groove 14, and the sliding axis is in the same horizontal plane as the rotation axis of the driven gear 32. The end of the connecting rod 62 away from the crank 61 is hingedly connected with the sliding block 63, and the hinge axis is parallel to the rotation axis of the driven gear 32, and the hinge axis of the connecting rod 62 and the sliding block 63 is in the same horizontal plane as the rotation axis of the driven gear 32. The crank 61, the connecting rod 62 and the sliding block 63 constitute a concentric crank and sliding block mechanism.

[0036] With reference to Figure 1 and Figure 2The rack 1 is provided with a control assembly 7, the control assembly 7 comprising a displacement sensor 71 and a controller 72. The displacement sensor 71 is arranged in the sliding groove 14 and fixedly connected with the side wall of the sliding groove 14 close to the second motor 13, the displacement sensor 71 being used for detecting the position information of the sliding block 63 and converting into a position signal input to the controller 72. The controller 72 is fixedly arranged on the rack 1, the controller 72 being electrically connected with the displacement sensor 71, the first motor 12, the second motor 13, the third motor 43, the first electric push rod 51 and the second electric push rod 15, the controller 72 being used for receiving the position signal transmitted by the displacement sensor 71 and controlling the working states of the first motor 12, the second motor 13, the third motor 43, the first electric push rod 51 and the second electric push rod 15.

[0037] With reference to Figure 2 and Figure 3 The rack 1 is provided with an upper roller mechanical arm 16, the base of the upper roller mechanical arm 16 being fixedly connected with the rack 1, the upper roller mechanical arm 16 being used for arranging the winding roller 2 on the movable end of the second electric push rod 15.

[0038] During the production of the paper roll, when the winding roller 2 of the first end portion 111 is rotated by the second motor 13, the driving gear 31 rotates to drive the driven gear 32 to rotate, and when the driving gear 31 rotates one circle, the angle of rotation of the driven gear 32 is 360 divided by the number of teeth of the driven gear 32, and when the driven gear 32 rotates, the crank 61 is driven to rotate, thereby driving the sliding block 63 to reciprocatingly move through the connecting rod 62, and the sliding block 63 drives the mounting block 41 and the cutting roller 42 to move.

[0039] Initially, the cutting roller 42 abuts against the winding roller 2 of the first end portion 111, and when the winding roller 2 is rotated by the second motor 13 to start winding the paper tape on the winding drum 21, the sliding block 63 drives the mounting block 41 and the cutting roller 42 to move away from the winding roller 2, and when the winding roller 2 is rotated by the second motor 13 for a certain number of turns, the amount of the paper tape wound on the winding drum 21 reaches a proper value, the sliding block 63 drives the mounting block 41 and the cutting roller 42 to move close to the winding roller 2, and the cutting roller 42 abuts against the paper tape, and the paper tape is adhered to the cutting roller 42 under the action of the adhesive tape on the cutting roller 42. In this process, the displacement sensor 71 detects the position information of the sliding block 63, and when the displacement sensor 71 detects that the distance between the sliding block 63 and itself gradually decreases and reaches a preset value, the controller 72 first controls the third motor 43 to rotate, thereby driving the cutting roller 42 to rotate, so that the cutter 44 moves close to the paper tape to cut the paper tape between the cutting roller 42 and the winding roller 2 on the first end portion 111, and then the third motor 43 drives the cutting roller 42 to reversely rotate to reset the cutter 44.

[0040] After the paper tape is cut, the controller 72 controls the first electric push rod 51 to retract, and the movable end of the first electric push rod 51 and the connecting key 52 slide away from the winding roller 2 on the first end portion 111, so that the second motor 13 is disconnected from the winding roller 2 on the first end portion 111. After the first electric push rod 51 is retracted, the controller 72 starts the first motor 12, the first motor 12 drives the rotating frame 11 to rotate, thereby driving the winding roller 2 on the first end portion 111 to rotate downward, and the winding roller 2 on the second end portion 112 is coaxial with the output shaft of the second motor 13, and the third end portion 113 at the bottom is rotated upward to the side of the upper roller mechanical arm 16. The controller 72 controls the second electric push rod 15 on the first end portion 111 to retract, so that the winding roller 2 on the first end portion 111 is dropped on the bottom of the frame 1. At the same time, the controller 72 controls the upper roller mechanical arm 16 and the second electric push rod 15 of the third end portion 113 to start working at the same time. The upper roller mechanical arm 16 places the to-be-installed winding roller 2 at a position coaxial with the second electric push rod 15 of the third end portion 113, and the second electric push rod 15 extends, and the movable end of the second electric push rod 15 is inserted into the inner hole of the to-be-installed winding roller 2.

[0041] Then the controller 72 controls the second motor 13 to rotate, at this time the second motor 13 is not in a connected state with the winding roller 2 on the second end portion 112, the second motor 13 rotates to drive the driving gear 31 and the driven gear 32 to rotate, and the slider 63 is driven by the centering crank slider mechanism to continue to slide towards the winding roller 2 on the second end portion 112 until the cutting roller 42 abuts against the winding roller 2 on the second end portion 112, and the adhesive tape on the winding roller 2 is used to bond the paper tape produced by the paper machine to the winding roller 2 on the second end portion 112. Then the controller 72 controls the first electric push rod 51 to extend, so that the movable end of the first electric push rod 51 is inserted into the inner hole of the winding roller 2 on the second end portion 112, and the connecting key 52 is inserted into the key groove 22 on the winding roller 2 on the second end portion 112, so that the second motor 13 is fixed with the winding roller 2 on the second end portion 112, and the controller 72 controls the second motor 13 to start, so that the production of the paper roll can continue.

[0042] It should be noted that, since the rotating speeds of the first motor 12, the second motor 13 and the third motor 43 are constant, and the extension and retraction speeds of the first electric push rod 51 and the second electric push rod 15 are constant, the controller 72 can control the working states of the first motor 12, the second motor 13, the third motor 43, the first electric push rod 51 and the second electric push rod 15 by setting a time delay.

[0043] The implementation principle of the paper roll rewinding machine limiting mechanism is as follows: When the paper roll is produced, the first motor 12 drives the rotating frame 11 to rotate, and the roll 2 on the first end portion 111 is coaxially arranged with the output shaft of the second motor 13, then the operator starts the first electric push rod 51, and the first electric push rod 51 extends, the movable end of the first electric push rod 51 is arranged in the inner hole of the roll 2, and the connecting key 52 is arranged in the key groove 22 on the roll 2, so that the second motor 13 is fixedly connected with the roll 2 on the first end portion 111.

[0044] Then, the second motor 13 is started, the second motor 13 drives the first electric push rod 51 to rotate, and the roll 2 on the first end portion 111 is driven to rotate by the connecting key 52, so as to drive the roll 21 to rotate, and the paper tape produced by the paper machine is fixed on the roll 21 by the adhesive tape, and the roll 21 rotates, so as to wind the paper tape on the roll 21.

[0045] When the second motor 13 drives the roll 2 on the first end portion 111 to rotate, the driving gear 31 rotates, drives the driven gear 32 to rotate, and drives the crank 61 to rotate, the crank 61 drives the sliding block 63 to reciprocate through the connecting rod 62, and the sliding block 63 drives the mounting block 41 and the cutting roller 42 to reciprocate. When the second motor 13 drives the roll 2 on the first end portion 111 to rotate to start winding the paper tape on the roll 21, the sliding block 63 drives the mounting block 41 and the cutting roller 42 to move away from the roll 2 on the first end portion 111, when the second motor 13 drives the roll 2 on the first end portion 111 to rotate for a certain number of turns, the amount of paper tape wound on the roll 21 reaches a suitable value, the sliding block 63 drives the mounting block 41 and the cutting roller 42 to move towards the roll 2 on the first end portion 111, and the cutting roller 42 abuts against the paper tape, and the paper tape is adhered to the cutting roller 42 under the action of the adhesive tape on the cutting roller 42. In this process, the displacement sensor 71 detects the position information of the sliding block 63, when the displacement sensor 71 detects that the distance between the sliding block 63 and itself gradually decreases and reaches a preset value, the controller 72 first controls the third motor 43 to rotate, so as to drive the cutting roller 42 to rotate, and the cutting knife 44 moves towards the paper tape to cut the paper tape between the cutting roller 42 and the roll 2 on the first end portion 111, and then the third motor 43 drives the cutting roller 42 to rotate reversely, so as to reset the cutting knife 44.

[0046] After the paper tape is cut, the controller 72 controls the first electric push rod 51 to retract, and the movable end of the first electric push rod 51 and the connecting key 52 slide away from the winding roller 2 on the first end portion 111, so that the second motor 13 is disconnected from the winding roller 2 on the first end portion 111. After the first electric push rod 51 is retracted, the controller 72 starts the first motor 12, and the first motor 12 drives the rotating frame 11 to rotate, thereby driving the winding roller 2 on the first end portion 111 to rotate downward, and the winding roller 2 on the second end portion 112 is coaxial with the output shaft of the second motor 13, and the third end portion 113 at the bottom is rotated upward to the side of the upper roller mechanical arm 16. The controller 72 controls the second electric push rod 15 on the first end portion 111 to retract, so that the winding roller 2 on the first end portion 111 is dropped on the bottom of the frame 1. At the same time, the controller 72 controls the upper roller mechanical arm 16 and the second electric push rod 15 of the third end portion 113 to start working at the same time. The upper roller mechanical arm 16 places the to-be-installed winding roller 2 at a position coaxial with the second electric push rod 15 of the third end portion 113, and the second electric push rod 15 extends, and the movable end of the second electric push rod 15 is inserted into the inner hole of the to-be-installed winding roller 2.

[0047] Then the controller 72 controls the second motor 13 to rotate, and at this time, the second motor 13 is not connected with the winding roller 2 on the second end portion 112. The second motor 13 rotates to drive the driving gear 31 and the driven gear 32 to rotate, and the slider 63 is continuously slid to the direction close to the winding roller 2 on the second end portion 112 through the centering crank slider mechanism, until the cutting roller 42 abuts against the winding roller 2 on the second end portion 112, and the paper tape produced from the paper machine is adhered to the winding roller 2 on the second end portion 112 under the action of the adhesive tape on the winding roller 2. Then the controller 72 controls the first electric push rod 51 to extend, so that the movable end of the first electric push rod 51 is inserted into the inner hole of the winding roller 2 on the second end portion 112, and the connecting key 52 is inserted into the key groove 22 on the winding roller 2 on the second end portion 112, so that the second motor 13 is fixed with the winding roller 2 on the second end portion 112. The controller 72 controls the second motor 13 to start, and the production of the paper roll can continue.

[0048] The above are preferred embodiments of the present application, which do not limit the protection scope of the present application. Therefore, any equivalent changes made on the basis of the structure, shape, and principle of the present application should be covered by the protection scope of the present application.

Claims

1. A material limiting mechanism for a rewinding machine, characterized by: The invention comprises a frame (1), a winding roller (2), a metering component (3), a cutting component (4) and a connecting component (5); a rotating frame (11) is rotatably provided on the frame (1); a first motor (12) is fixedly provided on the frame (1), and the first motor (12) is used to drive the rotating frame (11) to rotate; at least two winding rollers (2) are provided, and both are rotatably provided on the rotating frame (11); a reel (21) is fixedly provided on the winding roller (2), and a rubber strip is provided on the reel (21); a second motor (13) is fixedly provided on the frame (1), and the second motor (13) is used to drive the winding roller (2) to rotate. The metering assembly (3) includes a driving gear (31) and a driven gear (32); the driving gear (31) is an incomplete gear, and the driving gear (31) is coaxially fixedly connected to the output shaft of the second motor (13); the driven gear (32) is rotatably arranged on the frame (1), and the driven gear (32) is engaged with the driving gear (31); the cutting assembly (4) is arranged on the frame (1) and is used to cut the paper tape and fix the cut paper tape; the connecting assembly (5) is arranged on the frame (1) and is used to adjust the connection state between the second motor (13) and the roller (2).

2. The material limiting mechanism of the rewinding machine according to claim 1, characterized in that: The cutting assembly (4) comprises a mounting block (41), a cutting roller (42), a third motor (43) and a cutter (44); the mounting block (41) is slidably arranged on the frame (1); the cutting roller (42) is rotatably connected to the mounting block (41), and a rubber strip is also arranged on the cutting roller (42); the third motor (43) is used to drive the cutting roller (42) to rotate; the cutter (44) is fixedly arranged on the cutting roller (42); a transmission assembly (6) is arranged on the frame (1), and the transmission assembly (6) is used to transmit the rotation of the driven gear (32) to the mounting block (41) and drive the mounting block (41) to slide; a control assembly (7) is arranged on the frame (1), and the control assembly (7) is used to control the working state of the third motor (43).

3. The material limiting mechanism of the rewinding machine according to claim 2, characterized in that: The transmission assembly (6) includes a crank (61), a connecting rod (62) and a slider (63); the crank (61) is fixedly connected to the driven gear (32); one end of the connecting rod (62) is hinged to the crank (61); a slide groove (14) is provided on the frame (1); the slider (63) is slidably arranged in the slide groove (14), and one end of the connecting rod (62) away from the crank (61) is hinged to the slider (63).

4. The material limiting mechanism of the rewinding machine according to claim 3, characterized in that: The control component (7) includes a displacement sensor (71) and a controller (72); the displacement sensor (71) is fixedly arranged in the slide groove (14), and the displacement sensor (71) is used to detect the position information of the slider (63) and convert it into a position signal to input into the controller (72); the controller (72) is fixedly arranged on the frame (1), and the controller (72) is electrically connected to the displacement sensor (71) and the third motor (43), and the controller (72) is used to receive the position signal transmitted by the displacement sensor (71) and control the working state of the third motor (43).

5. The material limiting mechanism of the rewinding machine according to claim 4, characterized in that: The connecting assembly (5) includes a first electric push rod (51) and a connecting key (52); the fixed end of the first electric push rod (51) is coaxially fixedly connected to the output shaft of the second motor (13); the winding roller (2) is a tubular structure, and a key slot (22) is provided on the winding roller (2); the connecting key (52) is fixedly arranged on the movable end of the first electric push rod (51), and the connecting key (52) is adapted to the key slot (22); the controller (72) is electrically connected to both the first electric push rod (51) and the first motor (12), and the controller (72) is also used to control the working states of the first electric push rod (51) and the first motor (12).

6. The material limiting mechanism of the rewinding machine according to claim 5, characterized in that: The connecting key (52) is fixedly arranged on the top of the movable end of the first electric push rod (51); a counterweight (23) is fixedly arranged on the winding roller (2), and the counterweight (23) is located on a side of the winding roller (2) away from the key slot (22).

7. The material limiting mechanism of the rewinding machine according to claim 5, characterized in that: The frame (1) is provided with a second electric push rod (15), and at least two second electric push rods (15) are provided. The fixed end of the second electric push rod (15) is fixedly connected to the rotating frame (11), and the movable end of the second electric push rod (15) is inserted into the roller (2). The roller (2) and the movable end of the second electric push rod (15) can rotate relative to each other. The second electric push rod (15) is electrically connected to the controller (72), and the controller (72) is also used to control the working state of the second electric push rod (15).

8. The material limiting mechanism of the rewinding machine according to claim 7, characterized in that: An upper roller manipulator (16) is fixedly provided on the frame (1), and the upper roller manipulator (16) is used to insert the winding roller (2) onto the movable end of the second electric push rod (15); the upper roller manipulator (16) is electrically connected to the controller (72), and the controller (72) is also used to control the working state of the upper roller manipulator (16).

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