Paper cutter mechanism of rewinding machine

Abstract

The utility model provides a paper breaking knife mechanism of a rewinding machine, which comprises a first rack positioned below a front bottom roller and a rear bottom roller, a paper breaking guide rail is arranged on the first rack, a sliding knife holder is arranged on the paper breaking guide rail, and a paper breaking knife is arranged on the sliding knife holder; a tool apron driving mechanism for driving the sliding tool apron to slide on the paper breaking guide rail is hinged between the first rack and the sliding tool apron; the paper breaking guide rail comprises an arc guide rail used for cutting and an avoiding guide rail used for feeding and retracting. The circle center of the arc guide rail is concentric with the rear bottom roller; the circular arc guide rail and the avoiding guide rail are in smooth transition; and the paper breaking track is gradually heightened from back to front. According to the utility model, the cutter holder driving mechanism can extend to realize the original two actions of feeding and cutting which are performed separately, and the cutter holder driving mechanism is shortened to realize the cutter retracting action; and the cutting efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to paper processing field, and specifically relates to a rewinding machine paper cutting mechanism. BACKGROUND

[0002] The rewinding machine is used for longitudinally cutting the paper roll (called as the original paper roll) which is preliminarily wound on the rewinding machine, and rewinding into the finished paper roll with the width and tightness meeting the requirements, and the poor quality paper can be removed and the broken end can be bonded during the rewinding process. The rewinding machine is composed of a paper placing frame device, a longitudinal cutting device, a paper winding device, a hydraulic gas control system and a transmission control system. The paper cutting device includes a paper cutting knife for cutting the paper web. The patent CN208617037U discloses a novel high-speed rewinding machine paper cutting device. A plurality of arc-shaped guide rails are arranged below the conveying paper roller, and an arc-shaped guide rail is arranged on the first rack. A sliding seat is arranged on the arc-shaped guide rail, and a paper cutting blade is arranged on the sliding seat. The power mechanism includes a support seat connected to the first rack, and a power cylinder is hinged to the support seat, and the piston rod of the power cylinder is connected to the bottom of the sliding seat. The power cylinder is extended and retracted to drive the sliding seat and the paper cutting blade to move along the arc-shaped rail to cut the paper web. The support seat slides on the first rack, and the height can be adjusted. However, the structure of the comparative document has a problem. The paper cutting blade rotates along the arc-shaped rail to cut the paper. When the paper does not need to be cut, the paper cutting blade is still located in the cutting position above the arc-shaped rail, which hinders the work of the rewinding machine. In order to solve this problem, the height of the arc-shaped guide rail needs to be adjusted up and down. When the paper needs to be cut, the arc-shaped guide rail is lifted upwards to drive the paper cutting blade to the appropriate position. After the cutting is completed, the arc-shaped guide rail is moved downwards to drive the paper cutting blade to complete the process of withdrawing the cutter. However, in the above structure, two groups of hydraulic cylinders need to work together. One group of hydraulic cylinders lifts or lowers the arc-shaped rail to complete the cutter positioning and withdrawing process, and the other group of hydraulic cylinders drives the sliding seat and the paper cutting blade to move along the arc-shaped rail to cut the paper. The overall structure is complex and the cost is high. SUMMARY

[0003] The utility model provides a rewinding machine paper cutting device.

[0004] The utility model discloses a rewinding machine paper cutting mechanism, including the first rack below the front bottom roll and rear bottom roll, set up paper cutting guide rail on the first rack, set up sliding tool seat on paper cutting guide rail, set up paper cutting knife on sliding tool seat, the tool seat drive mechanism that drives sliding tool seat to slide on paper cutting guide rail is hinged between the first rack and sliding tool seat, paper cutting guide rail includes the arc guide rail for cutting and the avoidance guide rail for entering the cutter and withdrawing the cutter, the center of the arc guide rail is concentric with rear bottom roll, the arc guide rail and avoidance guide rail between round smooth transition, from rear to front, paper cutting guide rail gradually becomes high.

[0005] The shape of the avoiding guide rail is circular arc, the avoiding guide rail is tangent to the circular arc guide rail, and the center of the avoiding guide rail and the center of the circular arc guide rail are respectively located on two sides of the paper cutting guide rail.

[0006] The knife seat driving mechanism is arranged on the first rack with the lower end hinged, and the paper cutting cylinder is arranged on the upper end to slide the knife seat.

[0007] The sliding knife seat comprises a roller fixing plate, rollers are arranged on the roller fixing plate and rotate against the two sides of the paper cutting guide rail, the lower end of the roller fixing plate is hinged to one end of the knife seat driving mechanism, the upper end of the roller fixing plate is provided with a paper cutting arc plate which is concentric with the rear bottom roller, and the upper end of the paper cutting arc plate is provided with the paper cutting knife.

[0008] Compared with the prior art, the new paper cutting guide rail is arranged in the utility model, and the paper cutting guide rail does not need to move up and down to complete the feeding and retraction of the knife. Only one set of driving mechanism is needed to drive the sliding knife seat to move on the paper cutting guide rail, so that the paper cutting knife can be driven to move along the avoiding guide rail from the avoiding position to the position concentric with the rear bottom roller, and then continue to move along the circular arc guide rail to realize the cutting of the paper web. The extension of the knife seat driving mechanism can realize the feeding and cutting which are originally two separate actions, and the shortening of the knife seat driving mechanism realizes the retraction action; the operation time is reduced, and the cutting efficiency is improved. The utility model has the advantages of simple structure, low cost, convenient operation, difficulty in damage and improved work efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0009] Figure 1 It is a structural principle schematic view of the utility model.

[0010] Figure 2 It is Figure 1 It is a partial schematic view of the paper cutting knife.

[0011] Figure 3 It is a schematic view of the paper top roller mechanism.

[0012] Figure 4 It is Figure 3 It is a side view of the utility model.

[0013] In the figure, 1 is a front bottom roller, 2 is a rear bottom roller, 3 is a first rack, 30 is a guide rail mounting seat, 31 is a fixing plate, 4 is a paper cutting guide rail, 41 is a circular arc guide rail, 42 is an avoiding guide rail, 5 is a sliding knife seat, 50 is a paper cutting arc plate, 6 is a paper cutting knife, 7 is a knife seat driving mechanism, 8 is a second rack, 80 is a fixing seat, 81 is a connecting beam, 82 is a clamping cylinder, 83 is a supporting beam, 84 is a vertical plate, 85 is a paper top roller, 86 is a blowing pipe and 87 is a supporting wheel. DETAILED DESCRIPTION

[0014] In the utility model, unless another definite provision and limitation, the technical terms used in the application should be the general meaning understood by the technical personnel described in the utility model. The terms "connect", "connect", "fix", "set" and the like should be understood broadly, can be fixed connection, also can be detachable connection, or be integrated; can be direct connection, also can be indirect connection through intermediate medium; can be mechanical connection, also can be electrical connection. Unless another definite provision and limitation, the first feature is "on" or "under" the second feature can be the direct contact of the first and second features, or indirect contact through intermediate medium. Moreover, the first feature is "on" or "on" or "on" the second feature can be the first feature is directly above or obliquely above the second feature, or just indicates that the horizontal height of the first feature is higher than the second feature. The first feature is "under" or "under" or "under" the second feature can be the first feature is directly below or obliquely below the second feature, or just indicates that the horizontal height of the first feature is less than the second feature. The relationship terms such as first, second and the like are only used 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 the entities or operations. The orientation or positional relationship indicated by the terms such as "center", "transverse", "longitudinal", "length", "width", "thickness", "height", "front", "back", "left", "right", "up", "down", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", "clockwise", "counterclockwise" and the like used in the description is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation.

[0015] The technical scheme of the utility model will be described clearly and completely in combination with the drawings and specific embodiments. As Figures 1-4As shown, a rewinder paper cutter mechanism, comprising a first frame 3 below the front bottom roller 1 and the rear bottom roller 2, a paper cutting guide rail is arranged on the first frame 3, a sliding cutter seat 5 is arranged on the paper cutting guide rail, and a paper cutter 6 is arranged on the sliding cutter seat 5; a cutter seat driving mechanism 7 is hingedly arranged between the first frame 3 and the sliding cutter seat 5 to drive the sliding cutter seat 5 to slide on the paper cutting guide rail; the paper cutting guide rail comprises a circular arc guide rail 41 for cutting and a avoiding guide rail 42 for feeding and retracting; the center of the circular arc guide rail 41 is concentric with the rear bottom roller 2; the circular arc guide rail 41 and the avoiding guide rail 42 are smoothly transitioned; the paper cutting guide rail 4 gradually increases from back to front. The front bottom roller 1 is located in the front, and the rear bottom roller 2 is located in the rear. The front-rear direction here is consistent with it. The paper cutting guide rail 4 gradually increases from back to front, and can include a section of distance that maintains the same height. When the sliding cutter seat 5 is located in the avoiding track, the sliding cutter seat 5 is relatively low in position and is located behind the rear paper roller, the sliding cutter seat 5 and the paper cutter 6 avoid the working position of the front paper roller and the rear paper roller, and avoid affecting other operations on the rewinder. The smooth transition facilitates the smooth movement of the sliding cutter seat 5 on the entire paper cutting guide rail. The circular arc transition includes tangency, that is, the contact position of the circular arc guide rail 41 and the avoiding guide rail 42 is tangent. In the utility model, a new paper cutting guide rail is arranged, and the feeding and retracting of the paper cutting guide rail 4 is not required. Only the cutter seat driving mechanism 7 drives the sliding cutter seat 5 to move on the paper cutting guide rail, which can drive the paper cutter 6 to move along the avoiding guide rail 42 from the avoiding position to the position concentric with the rear bottom roller 2, and continue to move along the circular arc guide rail 41 to realize the cutting of the paper web. After cutting is completed, the sliding cutter seat 5 drives the paper cutter 6 to move to the avoiding position until the next operation. The extension of the cutter seat driving mechanism 7 can realize the originally two separate actions of feeding and cutting, and the shortening of the cutter seat driving mechanism 7 realizes the retracting action; the required operation time is less, and the cutting efficiency is improved. The utility model has the advantages of simple structure, low cost, convenient operation, not easy to damage and improved work efficiency.

[0016] Preferably, the shape of the avoidance guide rail 42 is a circular arc, the avoidance guide rail 42 is tangent to the circular arc guide rail 41; the center of the avoidance guide rail 42 and the center of the circular arc guide rail 41 are respectively located on both sides of the paper cutting guide rail. The diameter of the avoidance guide rail 42 is set as needed, which can be the same as or different from the center of the circular arc guide rail 41. Preferably, the radius of the corresponding circular arc of the avoidance guide rail 42 and the circular arc guide rail 41 is the same, which is convenient for processing. The avoidance guide rail 42 and the circular arc guide rail 41 can be integrally provided. They can also be separately processed and manufactured, and then integrated by means of bolt connection, welding and the like in the later period. The avoidance guide rail 42 can also be of other shapes, such as a straight line segment tangent to the circular arc guide rail 41 and a circular arc segment tangent to the straight line segment. Or it includes a circular arc segment tangent to the circular arc guide rail 41 and a straight line segment tangent to the circular arc segment at the rear. Or the avoidance guide rail 42 can also be a combination of various circular arcs, straight lines and the like, as long as it can smoothly transition to ensure the smooth movement of the sliding knife holder 5.

[0017] The knife holder driving mechanism 7 is a paper cutting cylinder provided on the first rack 3 at the lower end and hingedly connected to the sliding knife holder 5 at the upper end. The paper cutting cylinder is a kind of cylinder, which has two actions: elongation and shortening. The elongation of the paper cutting cylinder can directly realize the cutting-in and cutting, which are originally two separate actions, and the shortening of the paper cutting cylinder can complete the cutting-out action. The operation steps and time are reduced, and the effect is improved. Of course, it can also be an oil cylinder. The installation position of the specific cylinder belongs to the prior art. In addition, the first rack 3 includes two fixed plates 31 connected by at least one fixed beam; the fixed beam is provided with a guide rail mounting seat 30; and the guide rail mounting seat 30 is provided with the paper cutting guide rail.

[0018] The sliding knife holder 5 includes a roller fixed plate 31, which is provided with rollers rotating on the two sides of the paper cutting guide rail 4; the lower end of the roller fixed plate 31 is hingedly connected to one end of the knife holder driving mechanism 7; the upper end of the roller fixed plate 31 is provided with a paper cutting arc plate 50 concentric with the rear bottom roller 2; and the upper end of the paper cutting arc plate 50 is provided with a paper cutting knife 6. The paper cutting knife 6 can be a sawtooth-shaped blade. At least two rollers can be provided on each side. The upper roller and the lower roller make the roller fixed plate 31 and the paper cutting guide rail 4 rollingly connected and limited.

[0019] Further, a top paper roller 85 mechanism for pressing the rear bottom roller 2 during paper cutting is arranged on the second frame 8; the second frame 8 comprises two fixed seats 80 on the two sides, and the fixed seats 80 are connected by a connecting beam 81; the connecting beam 81 is connected to an upper support beam 83 by a linear driving mechanism, and vertical plates 84 are fixedly arranged at the two ends of the support beam 83, and the vertical plates 84 are rotationally connected to the fixed seats 80 on the corresponding sides; and at least one top paper roller 85 is rotationally arranged above the support beam 83. Specifically, a plurality of supports are arranged at the upper end of the support beam 83, a rotating shaft is arranged in each support, and a bearing is arranged on the rotating shaft. The two ends of the top paper roller 85 are provided with plugs, which are arranged on the bearings, so that the top paper roller 85 is rotationally arranged in the corresponding support. The linear driving mechanism is extended and retracted to drive the top paper roller 85 to rotate around the center of the connection between the vertical plate 84 and the fixed seat 80, so as to tighten and loosen the rear bottom roller 2. During paper cutting, the top and bottom roller mechanism is used to apply pressure to the rear paper roller, so as to ensure that the paper web is more stable during cutting.

[0020] Further, a support wheel 87 is arranged below each top paper roller 85; the support wheel 87 is arranged on the upper surface of the support beam 83; and a blowing pipe 86 is arranged on the support beam 83.

[0021] Further, the linear driving mechanism is a tightening cylinder 82.

[0022] In specific implementation, when paper cutting is needed, the tightening cylinder 82 is elongated to drive the paper pressing roller to apply pressure to the rear bottom roller 2. The paper cutting cylinder is elongated to drive the sliding knife seat 5 to move from the avoiding position to the position concentric with the rear bottom roller 2 and continue to move along the circular arc guide rail 41, so as to realize the cutting of the paper web by the paper cutting knife 6. After cutting is completed, the paper cutting cylinder is shortened, the sliding knife seat 5 drives the paper cutting knife 6 to move to the avoiding position and waits for the next operation. The tightening cylinder 82 is retracted to drive the paper pressing roller to return to the original position.

[0023] The technical features of the above-described embodiments can be combined in any manner, as long as the combination of the technical features does not exist contradictory, and should be considered as the scope of the present application. Without departing from the overall concept of the present application, the technical solution of the present application can be replaced or changed, and several changes and improvements should be considered as the protection scope of the present application.

Claims

1. A paper-cutting knife mechanism for a rewinder, comprising a first frame located below the front bottom roll and the rear bottom roll, characterized in that: A paper-cutting guide rail is provided on the first frame, a sliding knife holder is provided on the paper-cutting guide rail, and a paper-cutting knife is provided on the sliding knife holder; a knife holder driving mechanism that drives the sliding knife holder to slide on the paper-cutting guide rail is hinged between the first frame and the sliding knife holder; the paper-cutting guide rail includes an arc guide rail for cutting and a clearance guide rail for knife advance and retraction; the center of the arc guide rail is concentric with the rear bottom roller; the arc guide rail and the clearance guide rail have a smooth transition; from back to front, the paper-cutting guide rail gradually becomes higher.

2. The paper-cutting knife mechanism for a rewinder according to claim 1, characterized in that: The avoidance guide rail is arc-shaped and tangent to the arc guide rail; the center of the avoidance guide rail and the center of the arc guide rail are located on both sides of the paper-cutting guide rail, respectively.

3. The paper-cutting knife mechanism for a rewinder according to claim 1, characterized in that: The knife holder drive mechanism is a paper-cutting cylinder with its lower end hinged to the first frame and its upper end hinged to the sliding knife holder.

4. The paper-cutting knife mechanism for a rewinder according to claim 1, characterized in that: The sliding knife holder includes a roller fixing plate, on which rollers are rotatably mounted on both sides of the paper cutting guide rail; the lower end of the roller fixing plate is hinged to one end of the knife holder driving mechanism; the upper end of the roller fixing plate is provided with a paper cutting arc plate concentric with the rear bottom roller; and a paper cutting knife is provided at the upper end of the paper cutting arc plate.

Images