Paper core feeding device of rewinding machine

Abstract

The utility model provides a paper core feeding device of a rewinding machine. The paper core feeding device comprises a connecting beam and a sliding beam below the connecting beam, at least one lifting driving mechanism is arranged between the connecting beam and the movable beam; a plurality of suction cup frames are detachably arranged at the lower end of the sliding beam in the length direction of the sliding beam, and the number of the suction cup frames corresponds to the number of paper cores on a supporting frame used for storing the paper cores; the lower end of each sucker frame is provided with a set of suckers communicated with an air source in the length direction of the sucker frame. And each group of suckers corresponds to one paper core. Sucker frames with different lengths can be arranged according to the number and the length of paper cores, and the positions of the suckers can be arranged. And each paper core can be stably adsorbed. When the number and the length of the paper cores are changed, only different suction cup frames need to be replaced.

Description

Technical Field

[0001] This utility model belongs to the field of paper manufacturing, and specifically relates to a paper core feeding device for a rewinder. Background Technology

[0002] A rewinder is used to longitudinally cut the paper roll (called the raw paper roll) initially rolled on the rewinder and rewind it into a finished paper roll with the required width and tightness. During the rewinding process, poor-quality paper can be removed, and broken ends can be glued together. The rewinder consists of a paper feeding device, a longitudinal cutting device, a paper winding device, a hydraulic and pneumatic control system, and a transmission control system. The paper winding device consists of a frame, support rollers and a transmission device, a paper unloading table, a paper pusher roller, a paper feeding device, a paper pressing device, and a tightening device. The paper winding device takes the paper web cut by the longitudinal cutting device, passes it through the lower arc roller, and enters between the lower paper feeding device and the rear bottom roller. It is drawn out from bottom to top. After the paper feeding is completed, the paper web is glued to the paper core for winding. After winding to the required diameter, the paper pusher pushes the paper roll out of the bottom roller and onto the paper unloading table. Then, the paper unloading table is lowered, allowing the finished paper roll to fall to the ground, thus completing one rewinding cycle. Rewinders rewind wider rolls of raw paper into multiple sets of narrower finished rolls. Besides the operating speed, the duration of auxiliary time for each roll change also affects the rewinder's speed. Currently, after completing one set of finished rolls, the operator cuts the paper web, places it into a core tube, and then attaches the subsequent paper webs to the core tube for rewinding. This process is time-consuming.

[0003] Patent CN111847045A discloses an automatic paper core feeding device and rewinder. The paper core feeding mechanism includes a paper core platform, also known as a paper core magazine. The paper core enters a slide rail via a rotating paper core feeder, and a pushing mechanism moves the paper core within the slide rail. A paper core feeding mechanism is located at the bottom of the pusher roller mechanism, and this mechanism consists of a clamping arm, a rotating arm, and a clamping cylinder. The paper core falls from the slide rail of the paper core feeding mechanism into a semi-open drawer formed by the paper core tray and the clamping arm. Then, the piston rod of the clamping cylinder extends, and hydraulic cylinder IV rotates adaptively around its hinge point to clamp and fix the paper core. When the pusher roller mechanism drives the paper core feeding mechanism to reach above the front and rear bottom roller mechanisms, the piston rod of the clamping cylinder retracts until the paper core is released from the clamping state and falls onto the front and rear bottom roller mechanisms. This structure is relatively complex and has relatively low precision.

[0004] In patents CN216996921U (a paper core suction and release device) and CN220537130U (a paper core placement device and slitting and rewinding machine), suction cups are used to pick up the paper cores. However, these patents have some problems. In the rewinding machine, multiple short paper cores, after being cut, move from the paper core magazine to the slide where the paper cores are stored. They are arranged in a straight line in the slide and adjacent paper cores are pressed together. The suction cups in the prior art lack a buffer structure or a limiting structure, which can easily damage the suction cups when picking up paper cores. Changes in the length and number of paper cores can also lead to unstable suction. Summary of the Invention

[0005] This utility model provides a paper core feeding device for a rewinder.

[0006] The purpose of this utility model is achieved in the following manner: a paper core feeding device for a rewinding machine, comprising a connecting beam and a sliding beam below the connecting beam; at least one lifting drive mechanism is provided between the connecting beam and the sliding beam; a plurality of suction cup frames are detachably provided at the lower end of the sliding beam along its own length direction, the number of suction cup frames corresponding to the number of paper cores on the support frame used to store the paper cores; a set of suction cups connected to an air source is provided at the lower end of each suction cup frame along its own length direction; each set of suction cups corresponds to one paper core.

[0007] A connecting rod is fixedly installed on the lower surface of the suction cup holder; the suction cup is slidably mounted on the connecting rod; a buffer spring is installed on the connecting rod between the suction cup and the suction cup holder.

[0008] The lower surface of the sliding beam is provided with several limiting structures facing downwards; the limiting structures are detachably provided at both ends of the sliding beam and at the position where the sliding beam is located between two adjacent suction cup frames; the limiting structure includes a fixing rod and a pressure block provided at the lower end of the fixing rod; when the suction cup picks up the paper core, the lower surface of the pressure block contacts the surface of the paper core.

[0009] The limiting structure includes a fixing block fixedly disposed on the lower end face of the sliding beam, and a pressure block disposed below the fixing block; two fixing rods are disposed between the fixing block and the pressure block along the front-back direction; the lower surface cross-section of the pressure block is tapered.

[0010] The lifting drive mechanism is a lifting cylinder; an air tank is provided on the side of the connecting beam; an air source distributor is provided on the side of the sliding beam for each suction cup frame; the air tank is connected to each air source distributor through an air pipe; the air source distributor is connected to the suction cup on the corresponding suction cup frame.

[0011] The two ends of the connecting beam are rotatably connected to the two support arms of the rewinder's pusher roller; the pusher roller drives the connecting beam from above the support frame storing the paper cores to above the center position of the two bottom rollers. Compared with the prior art, this utility model provides a corresponding suction cup frame for each paper core, with the suction cup mounted on the suction cup frame, and the suction cup frame is detachably mounted on the sliding beam. Suction cup frames of different lengths can be set according to the number and length of the paper cores, and the position of the suction cups can also be set. This ensures that each paper core can be firmly adsorbed. When the number and length of the paper cores change, only different suction cup frames need to be replaced. Attached Figure Description

[0012] Figure 1 This is the front view of this utility model.

[0013] Figure 2 yes Figure 1 Enlarged view of the left side.

[0014] Figure 3 This is a magnified view of the suction cup part.

[0015] Figure 4 This is a side view of the present invention.

[0016] Figure 5 yes Figure 4 The suction cup sucks up the paper core.

[0017] Figure 6 yes Figure 5 Enlarged view of the middle section.

[0018] Figure 7 This is a schematic diagram showing the position of the result of this utility model in the rewinding machine.

[0019] Among them, 1 is the connecting beam, 2 is the sliding beam, 3 is the lifting cylinder, 4 is the suction cup frame, 5 is the support frame, 50 is the support shaft, 6 is the suction cup, 7 is the connecting rod, 8 is the buffer spring, 9 is the fixing block, 10 is the fixing rod, 11 is the pressure block, 12 is the air tank, 13 is the air source distributor, 14 is the support arm, and 15 is the paper core. Detailed Implementation

[0020] In this utility model, unless otherwise expressly specified and limited, the technical terms used in this application shall have the ordinary meaning understood by those skilled in the art. Terms such as "connected," "linked," "fixed," and "set" shall be interpreted broadly, referring to fixed connections, detachable connections, or integral connections; direct connections or indirect connections via an intermediate medium; mechanical connections or electrical connections. Unless otherwise expressly specified and limited, "above" or "below" a second feature may mean that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," or "over" a second feature may mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," or "under" a second feature may mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature. Relational terms such as "first," "second," etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. The terms used in the description, such as “center,” “lateral,” “longitudinal,” “length,” “width,” “thickness,” “height,” “front,” “rear,” “left,” “right,” “up,” “down,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” “outer,” “axial,” “radial,” “circumferential,” “clockwise,” and “counterclockwise,” indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation.

[0021] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings and specific embodiments. Figure 1-7As shown, a paper core feeding device for a rewinding machine includes a connecting beam 1 and a sliding beam 2 below the connecting beam 1; at least one lifting drive mechanism is provided between the connecting beam 1 and the sliding beam; characterized in that: a plurality of suction cup frames 4 are detachably provided at the lower end of the sliding beam 2 along its own length direction, the number of suction cup frames 4 corresponding to the number of paper cores 15 in the support frame 5 used to store paper cores 15; a set of suction cups 6 connected to an air source is provided at the lower end of each suction cup frame 4 along its own length direction; each set of suction cups 6 corresponds to one paper core 15. One set of suction cups 6 may include a plurality of suction cups 6 arranged at intervals, such as the 5 suction cups 6 shown in the figure. The suction cups 6 are arranged at a certain distance. The width of a set of suction cups 6 is smaller than the width of the paper web. In this utility model, a corresponding suction cup frame 4 is provided for each paper core 15, and the suction cups 6 are provided on the suction cup frame 4. The suction cup frame 4 is detachably provided on the sliding beam 2. Suction cup frames 4 of different lengths can be provided according to the number and length of the paper cores 15, and the positions of the suction cups 6 can be set. Ensure that each paper core 15 can be firmly adsorbed. When the number and length of paper cores 15 change, simply replace them with different suction cup holders 4. If the same suction cup 6 layout is used for paper cores 15 of any length, changes in the length of the paper cores 15 may result in some paper cores 15 exhibiting unstable adsorption.

[0022] A connecting rod 7 is fixedly mounted on the lower surface of the suction cup holder 4; the suction cup 6 is slidably mounted on the connecting rod 7; a buffer spring 8 is mounted on the connecting rod 7 between the suction cup 6 and the suction cup holder 4. When the suction cup 6 adsorbs the paper core 15, the buffer spring 8 ensures a tight adsorption while preventing damage to the suction cup 6. In the specific structure, the end of the connecting rod 7 is slightly larger to prevent it from detaching from the suction cup 6. These structures are common spring-buffered structures and will not be described in detail further.

[0023] The lower surface of the sliding beam is provided with several limiting structures facing downwards; the limiting structures are detachably provided at both ends of the sliding beam and at the position where the sliding beam is located between two adjacent suction cup frames 4; the limiting structure includes a fixing rod 10 and a pressure block 11 provided at the lower end of the fixing rod 10; when the suction cup 6 picks up the paper core 15, the lower surface of the pressure block 11 contacts the surface of the paper core 15. After the pressure block 11 contacts the surface of the paper core 15, the sliding beam can no longer move downwards, to prevent the suction cup frame 4 from continuing to press downwards and damaging the suction cup 6 after the buffer spring 8 reaches the compression limit position. For suction cups 6 without a buffer spring 8 structure at the top, the pressure block 11 of this utility model can also play a role in protecting the suction cup 6.

[0024] The limiting structure includes a fixing block 9 fixedly disposed on the lower end face of the sliding beam, and a pressure block 11 disposed below the fixing block 9; two fixing rods 10 are disposed between the fixing block 9 and the pressure block 11 along the front-back direction; the lower surface cross-section of the pressure block 11 is conical. The two inclined surfaces form a cone shape, and this structure can accommodate paper cores 15 of different sizes. The fixing rods 10 are provided with threads, and the pressure block 11 is provided with threaded holes. The lower end of the fixing rod 10 and the pressure block 11 can be connected by threads. The fixing block 9 can be provided with through holes, and nuts are respectively provided above and below the fixing block 9. The fixing rods 10 and the fixing block 9 are fixed by tightening the nuts with the fixing rods 10.

[0025] The lifting drive mechanism is a lifting cylinder 3; an air tank 12 is provided on the side of the connecting beam 1; an air source distributor 13 is provided on the side of the sliding beam corresponding to each suction cup frame 4; the air tank 12 is connected to each air source distributor 13 through air pipes; the air source distributor 13 is connected to the suction cup 6 on the corresponding suction cup frame 4. The air source distributor 13 ensures that the suction force of the suction cup 6 is uniform and stable. The air tank 12 and the air source distributor 13 are existing technologies and will not be described in detail.

[0026] The two ends of the connecting beam 1 are rotatably connected to the two side support arms 14 of the rewinder's pusher roller, respectively. The pusher roller drives the connecting beam 1 from above the support frame 5 storing the paper core 15 to above the center position of the two bottom rollers. The pusher roller is an existing structure in rewinders and belongs to the prior art. The specific structure can be as follows: for example, the pusher roller is rotatably mounted on the upper crossbeam of the rewinder; a hydraulic cylinder is hinged between the bracket behind the crossbeam and the support arm 14 of the pusher roller. The extension and retraction of the hydraulic cylinder drives the pusher roller to swing. Other structures can also be used. Pins can be fixedly mounted at both ends of the support arm 14, and the pins are connected to both ends of the connecting beam 1 through bearings, so that the connecting beam 1 is rotatably mounted on the pusher roller, thereby adaptively adjusting its position according to gravity and ensuring that it does not tilt with the swing of the pusher roller. In addition, the connecting beam 1 of this application can also be mounted on other power mechanisms and move accordingly.

[0027] Additionally, the support frame 5 is equipped with two parallel support shafts 50 for mounting the paper core 15; a limit detection frame can be installed on the front or rear side of the support frame 5, and a position sensor is installed on the limit detection frame. The position sensor is used to detect whether there is a paper core 15 on the support roller. The position sensor is electrically connected to the controller. The control valves of various hydraulic cylinders and pneumatic cylinders are also electrically connected to the controller. The structure of the paper core 15 before it arrives at the support frame 5 from another position is existing technology and has various structures. These will not be described in detail further.

[0028] In practice: The pusher roller drives the suction cup 6 to the top of the support frame 5; the lifting drive mechanism, i.e., the lifting cylinder, drives the entire sliding beam 2 downward until the pressure block 11 of the limiting structure contacts the paper core 15, at which point the suction cup 6 begins to adsorb the paper core 15. After adsorption is complete, the lifting cylinder retracts, causing the paper core 15 to rise linearly away from the support frame 5. The pusher roller swings, causing the paper core 15 to come to the center position of the two bottom rollers. At this time, the front section of the pusher roller has pushed the paper roll at the center position of the two bottom rollers forward. There is no object at the center position of the two bottom rollers. The lifting cylinder drives the paper core 15 downward to the center position of the two bottom rollers, and the suction cup 6 stops adsorbing. The lifting cylinder retracts. The pusher roller returns to its original position.

[0029] The present invention uses a lifting cylinder 3 to drive a suction cup 6 to lift the paper core 15. When the paper pusher pushes the paper roll to the position behind the unloading table, the lifting cylinder 3 falls, the suction cup 6 is de-aired, and the paper core is placed into the center of the two bottom rollers. This reduces manual intervention during the paper core 15 placement process, realizes the automation of the paper core 15 placement operation, and improves the machine operating speed and production efficiency.

[0030] The technical features of the embodiments described above can be combined in any way, and as long as there is no contradiction in the combination of these technical features, they should all be considered within the scope of this specification. Without departing from the overall concept of this utility model, any equivalent substitutions or modifications made to the technical solution of this utility model, as well as any changes and improvements, should also be considered within the protection scope of this utility model.

Claims

1. A rewinding machine paper core device, comprising a connecting beam and a sliding beam below the connecting beam; at least one lifting drive mechanism is arranged between the connecting beam and the sliding beam; characterized in that: The lower end of the sliding beam is detachably provided with a plurality of suction disc racks along the length direction of the sliding beam, the number of the suction disc racks corresponds to the number of paper cores stored in the support racks; the lower end of each of the suction disc racks is provided with a group of suction discs in communication with the air source along the length direction of the suction disc rack; each group of suction discs corresponds to one paper core.

2. The rewinder paper core device of claim 1, wherein: The lower surface of the suction disc rack is fixedly provided with a connecting rod; the suction disc is slidably arranged on the connecting rod; the connecting rod is provided with a buffer spring between the suction disc and the suction disc rack.

3. The paper core applicator of claim 2 wherein: The lower surface of the sliding beam is provided with a plurality of limiting structures; the limiting structures are detachably arranged at the two ends of the sliding beam and the position of the sliding beam between two adjacent suction disc racks; the limiting structure comprises a fixed rod and a pressing block arranged at the lower end of the fixed rod; when the suction disc sucks the paper core, the lower surface of the pressing block is in contact with the surface of the paper core.

4. The paper core applicator of claim 3 wherein: The limiting structure comprises a fixed block fixedly arranged at the lower end of the sliding beam, and the pressing block is arranged below the fixed block; two fixed rods are arranged between the fixed block and the pressing block along the front and rear directions; the lower surface of the pressing block is tapered.

5. The rewinder paper core device of claim 1, wherein: The lifting driving mechanism is a lifting cylinder; the side surface of the connecting beam is provided with an air bag; the side surface of the sliding beam is provided with a respective air source distributor corresponding to each suction disc rack; the air bag is connected to each air source distributor through an air pipe; the air source distributor is connected to the suction disc on the corresponding suction disc rack.

6. A paper core device for a rewinding machine according to any one of claims 1-5, characterized in that: The two ends of the connecting beam are respectively rotatably connected to the two side support arms of the paper pusher roll of the rewinding machine; the paper pusher roll drives the connecting beam to move from above the support rack storing the paper core to above the center position of the two bottom rollers.

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