A paper cutting device

Abstract

A paper cutting device, a bearing mechanism, a door type frame and a transposition mechanism. The bearing mechanism is used to bear the paper stack in a horizontal posture. The door type frame is provided with a paper pressing mechanism and a paper cutting mechanism, the paper pressing mechanism is used to compact the part of the paper stack to be trimmed, and the paper cutting mechanism is used to trim the paper stack. The transposition mechanism includes a truss, a cross beam is assembled on the truss through a forward movement module, a mounting seat is assembled on the cross beam through a lifting module, the bottom of the mounting seat is connected with a mounting frame, a clamping assembly for clamping the paper stack is assembled on the mounting frame, and a transposition driving unit for driving the mounting frame to rotate is mounted on the mounting seat. Compared with the prior art, the design of the transposition mechanism can automatically complete the rotation of the paper stack, avoids the uncertainty brought by manual operation, ensures that the paper stack maintains accurate posture during transposition and positioning, and thus the quality of the subsequent paper pressing and cutting process is stable and uniform.

Description

Technical Field

[0001] This utility model belongs to the field of paper cutting equipment, and specifically relates to a paper cutting device. Background Technology

[0002] In the printing, packaging, and paper processing industries, cutting stacks of paper is an essential process. Traditional paper cutting equipment typically includes a support platform for carrying the paper stack and a gantry frame spanning above the platform. This gantry frame integrates a paper pressing mechanism and a paper cutting mechanism. The basic workflow is as follows: the paper stack is placed on the support platform and pushed to the cutting station under the gantry frame; then, the paper pressing mechanism (such as a hydraulically or pneumatically driven pressing beam) descends, pressing the edge of the paper stack to be cut; next, the paper cutting mechanism (such as a guillotine cutter) descends, completing the cutting of a single edge of the paper stack. After one side is cut, the operator manually pulls the paper stack out of the cutting station, manually rotates it at a specific angle (usually 90 degrees), and pushes it back into the cutting station for the next round of positioning, pressing, and cutting. The entire repositioning and positioning process relies on the operator's experience and physical labor, making it a crucial link in the production line.

[0003] Although the aforementioned paper cutting devices based on manual repositioning are widely used, they have the following significant drawbacks:

[0004] 1. During the manual rotation and repositioning of the paper stack, it is difficult to guarantee that the positioning accuracy is completely consistent each time. Even slight angular or positional deviations can directly lead to quality problems such as non-perpendicular edges and inconsistent dimensions in the cut paper stack. In addition, when pushing the paper stack, uneven force can easily cause the paper stack to scatter or misalign on the platform, further affecting the cutting accuracy and making it difficult to guarantee the product qualification rate.

[0005] 2. During the manual dragging and rotation of the paper stack, severe sliding friction occurs between the bottom of the stack and the supporting platform. This friction not only requires the operator to expend more force, but also directly wears down or scratches the paper at the bottom of the stack, resulting in waste of raw materials and economic losses. Utility Model Content

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution.

[0007] A paper cutting device includes a carrying mechanism, a gantry frame, and a shifting mechanism. The carrying mechanism is used to carry a stack of paper in a horizontal position. The gantry frame is equipped with a paper pressing mechanism and a paper cutting mechanism. The paper pressing mechanism is used to press down the portion of the paper stack to be cut, and the paper cutting mechanism is used to cut the edges of the paper stack.

[0008] The shifting mechanism includes a truss, on which a crossbeam is assembled via a forward moving mold, and a mounting base is assembled on the crossbeam via a lifting mold. The bottom of the mounting base is connected to a mounting frame, on which a clamping assembly for holding paper stacks is mounted, and on which a shifting drive unit for driving the mounting frame to rotate is mounted.

[0009] In a preferred embodiment of the paper cutting device, the clamping assembly includes a clamping motor, a slide rail, and a first positioning plate; the clamping motor is connected to a screw, and the free end of the screw is mounted on the mounting frame via a bearing seat; the screw has two threaded sections with opposite directions of rotation; there are two first positioning plates, which are arranged facing each other and respectively connected to the two threaded sections; the slide rail is fixed on the mounting frame; and the first positioning plate has a slider that is slidably connected to the slide rail.

[0010] As a preferred embodiment of the paper cutting device, the clamping assembly further includes a second positioning plate, which is located on the side of the mounting frame away from the gantry frame. The second positioning plate and the two first positioning plates together form a clamping area for positioning the paper stack from three sides.

[0011] In a preferred embodiment of the paper cutting device, wear-resistant plates are installed at the bottom of the first positioning plate and the second positioning plate.

[0012] As a preferred embodiment of the paper cutting device, the first positioning plate and the second positioning plate are provided with rubber paper pushing components on the sides facing the paper stack.

[0013] As a preferred embodiment of the paper cutting device, the supporting mechanism includes a supporting platform and a turntable, wherein the turntable is mounted on the supporting platform via bearings, and the upper surface of the turntable is flush with the upper surface of the supporting platform.

[0014] As a preferred embodiment of the paper cutting device, the turntable is sized such that the bottom of the paper stack being clamped and moved thereon does not exceed the turntable's load-bearing capacity.

[0015] Compared with existing technologies, this application has the following beneficial technical effects: By adding a transposition mechanism, the rotation of the paper stack can be completed automatically, replacing the traditional manual paper stack flipping operation. This avoids the uncertainties caused by manual operation and ensures that the paper stack maintains a precise posture during each transposition and positioning, thereby ensuring stable and consistent quality in subsequent paper pressing and cutting processes. Attached Figure Description

[0016] Figure 1 Three-dimensional paper cutting device Figure 1 .

[0017] Figure 2 Three-dimensional paper cutting device Figure 2 .

[0018] Figure 3 This is a three-dimensional view of a portal frame.

[0019] Figure 4 This is a 3D diagram of the transposition mechanism.

[0020] Figure 5 This is the front view of the clamping component.

[0021] Figure 6 This is a 3D view of the clamping component.

[0022] The following is an explanation of the reference numerals in the attached figures:

[0023] 100. Supporting mechanism; 110. Supporting platform; 120. Turntable;

[0024] 200. Gantry frame; 210. Paper pressing mechanism; 220. Paper cutting mechanism;

[0025] 300. Shifting mechanism; 310. Truss; 311. Forward moving module; 312. Crossbeam; 313. Lifting module; 314. Mounting base; 315. Mounting frame; 316. Shifting drive unit; 320. Clamping assembly; 321. Clamping motor; 322. Screw; 323. Slide rail; 324. First positioning plate; 325. Second positioning plate; 326. Wear-resistant plate; 327. Paper pushing structure. Detailed Implementation

[0026] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0027] In the following embodiments, the same or similar reference numerals denote the same or similar components or components with the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0028] In the description of this utility model, it should be understood that the terms such as center, longitudinal, transverse, length, width, thickness, upper, lower, front, back, left, right, vertical, horizontal, top, bottom, inner, outer, clockwise, and counterclockwise, indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description; therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features shown. In the description of this utility model, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," etc., should be interpreted broadly, and those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0029] Reference Figures 1 to 6 A paper cutting device includes a carrying mechanism 100, a gantry frame 200, and a shifting mechanism 300. The carrying mechanism 100 is used to carry a stack of paper in a horizontal position. The gantry frame 200 is equipped with a paper pressing mechanism 210 and a paper cutting mechanism 220. The paper pressing mechanism 210 is used to press down the portion of the paper stack to be cut, and the paper cutting mechanism 220 is used to cut the edges of the paper stack.

[0030] The supporting mechanism 100 is used to support the paper stack in a horizontal position. Specifically, the supporting mechanism 100 includes a horizontal supporting platform 110. The supporting platform 110 can be an integral rigid table or a frame structure composed of multiple longitudinal beams and transverse beams 312, with steel plates or high-strength engineering plastic plates laid on top to form a flat supporting surface.

[0031] The paper-pressing mechanism 210 is used to press the edge of the paper stack to be cut before cutting to prevent the paper from wrinkling or shifting during cutting. The paper-pressing mechanism 210 is a conventional paper-cutting mechanism 220 of a paper cutter, including a paper-pressing beam and a paper-pressing drive unit that drives its lifting and lowering. The length direction of the paper-pressing beam is parallel to the crossbeam 312 of the portal frame 200, and its length is at least equal to the width of the paper stack. The paper-pressing drive unit can be, but is not limited to, a cylinder, a hydraulic cylinder, or an electric screw module. Its cylinder body or fixed end is mounted on the crossbeam 312 of the portal frame 200, and its driving end is connected to the paper-pressing beam through a transmission component. During operation, the paper-pressing drive unit drives the paper-pressing beam downwards, pressing it against the area above the edge of the paper stack to be cut.

[0032] The paper cutting mechanism 220 is used to trim the edges of the compacted paper stack. The paper cutting mechanism 220 includes a paper cutter and a paper cutting drive assembly that drives its movement. The paper cutter is a long, strip-shaped guillotine-type blade, with a blade length not less than the width of the paper stack. The paper cutting drive assembly drives the paper cutter to perform the cutting action. The paper cutting drive assembly includes a paper cutting drive motor and a crank mechanism that converts rotational motion into linear motion. The paper cutting drive motor is fixed to the crossbeam 312 of the gantry frame 200, and drives the paper cutter to move vertically through the crank mechanism, thereby completing the downward cut and return stroke. The paper cutting mechanism 220 is located in front of the paper pressing mechanism 210 along the paper stack conveying direction, ensuring that the paper pressing mechanism 210 first compacts the paper stack before the paper cutter performs the cutting.

[0033] The shifting mechanism 300 includes a truss 310, on which a crossbeam 312 is mounted via a forward moving module 311, and a mounting base 314 is mounted on the crossbeam 312 via a lifting module 313. A mounting frame 315 is connected to the bottom of the mounting base 314, and a clamping assembly 320 for clamping paper stacks is mounted on the mounting frame 315. A shifting drive unit 316 for driving the mounting frame 315 to rotate is mounted on the mounting base 314.

[0034] The clamping assembly 320 includes a clamping motor 321, a slide rail 323, and a first positioning plate 324. The clamping motor 321 is connected to a screw 322, the free end of which is mounted on a mounting frame 315 via a bearing seat. The screw 322 has two threaded sections with opposite directions of rotation. There are two first positioning plates 324, which are arranged facing each other and connected to the two threaded sections respectively. The slide rail 323 is fixed to the mounting frame 315, and the first positioning plate 324 has a slider that is slidably connected to the slide rail 323. By using the clamping motor 321 to drive the screw 322 with reverse threads, the two first positioning plates 324 can be driven to move towards or away from each other synchronously, realizing synchronous, uniform, and automatic clamping and releasing of both sides of the paper stack.

[0035] Furthermore, the clamping assembly 320 also includes a second positioning plate 325, which is located on the side of the mounting frame 315 away from the gantry frame 200. The second positioning plate 325 and the two first positioning plates 324 together form a clamping area for positioning the paper stack from three sides, so that the paper stack is firmly limited during the clamping process and effectively prevents displacement.

[0036] Wear-resistant plates 326 are installed at the bottom of the first positioning plate 324 and the second positioning plate 325. The wear-resistant plates 326 effectively reduce direct friction and wear between the bottom of the first and second positioning plates 325 and the surface of the supporting platform 110 (or turntable 120), reducing the frequency and cost of equipment maintenance. Rubber paper-pushing components 327 are provided on the sides of the first and second positioning plates 324 and 325 facing the paper stack. The rubber paper-pushing components 327 are soft and will not scratch or damage the paper surface when clamping and pushing the paper stack, ensuring the appearance quality of the finished paper.

[0037] To prevent wear and tear on the paper at the bottom of the paper stack, the supporting mechanism 100 includes a supporting platform 110 and a turntable 120. The turntable 120 is mounted on the supporting platform 110 via bearings, and its upper surface is flush with the upper surface of the supporting platform 110. The turntable 120 provides a dedicated, flat, and stable supporting surface for the rotation of the paper stack. When the shifting mechanism 300 drives the paper stack to rotate on the turntable 120, the turntable 120 rotates accordingly, resulting in rolling friction between the bottom of the paper stack and the surface of the turntable 120, rather than sliding friction. This greatly reduces friction and effectively prevents wear and scratches on the paper at the bottom of the paper stack during rotation. The dimensions of the turntable 120 are designed so that the bottom of the paper stack, which is clamped and moved onto it, does not exceed the bearing capacity of the turntable 120. This ensures that the entire weight and force of the paper stack are fully supported by the turntable 120 during rotation, preventing structural deformation caused by partial suspension of the paper stack.

[0038] The scope of protection of this utility model includes, but is not limited to, the above embodiments. The scope of protection of this utility model is defined by the claims. Any substitutions, modifications, or improvements to this technology that are easily conceived by those skilled in the art shall fall within the scope of protection of this utility model.

Claims

1. A paper cutting device, comprising: A load-bearing mechanism (100) is used to carry the paper stack in a horizontal position; A gantry frame (200) is equipped with a paper pressing mechanism (210) and a paper cutting mechanism (220). The paper pressing mechanism (210) is used to press down the part of the paper stack to be cut, and the paper cutting mechanism (220) is used to cut the paper stack. Its features are, It also includes a shifting mechanism (300), which includes a truss (310), a crossbeam (312) mounted on the truss (310) via a forward moving module (311), a mounting base (314) mounted on the crossbeam (312) via a lifting module (313), a mounting frame (315) connected to the bottom of the mounting base (314), a clamping assembly (320) for clamping paper stacks mounted on the mounting frame (315), and a shifting drive unit (316) for driving the mounting frame (315) to rotate on the mounting base (314).

2. The paper cutting device according to claim 1, characterized in that, The clamping assembly (320) includes a clamping motor (321), a slide rail (323), and a first positioning plate (324). The clamping motor (321) is connected to a screw (322), and the free end of the screw (322) is mounted on the mounting frame (315) through a bearing seat. The screw (322) has two threaded sections with opposite directions of rotation. There are two first positioning plates (324), which are arranged facing each other and connected to the two threaded sections respectively. The slide rail (323) is fixed on the mounting frame (315), and the first positioning plate (324) has a slider that is slidably connected to the slide rail (323).

3. A paper cutting device according to claim 2, characterized in that, The clamping assembly (320) further includes a second positioning plate (325), which is located on the side of the mounting frame (315) away from the gantry frame (200). The second positioning plate (325) together with the two first positioning plates (324) form a clamping area for positioning the paper stack from three sides.

4. A paper cutting device according to claim 3, characterized in that, Wear-resistant plates (326) are installed at the bottom of the first positioning plate (324) and the second positioning plate (325).

5. A paper cutting device according to claim 3, characterized in that, The first positioning plate (324) and the second positioning plate (325) are provided with rubber paper pushing components (327) on the side facing the paper stack.

6. A paper cutting device according to claim 1, characterized in that, The bearing mechanism (100) includes a bearing platform (110) and a turntable (120). The turntable (120) is mounted on the bearing platform (110) by bearings, and the upper surface of the turntable (120) is flush with the upper surface of the bearing platform (110).

7. A paper cutting device according to claim 6, characterized in that, The dimensions of the turntable (120) are configured such that the bottom of the stack of paper being held and moved thereon does not exceed the load-bearing capacity of the turntable (120).

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