A paper cutter

Abstract

The application relates to the field of paper cutting devices, and discloses a paper cutter which comprises a rack, a pressing assembly, a paper cutting assembly and a control assembly. The pressing assembly comprises a driving motor, a transmission plate and a pressing plate. The driving motor is arranged on an operation table and is in transmission connection with the transmission plate to drive the transmission plate to move leftward and rightward. The transmission plate is in sliding connection with the pressing plate to drive the pressing plate to move upward and downward to press a paperboard. The control assembly comprises a controller and a current sensor. The current sensor is electrically connected with the driving motor. The signal input end of the controller is connected with the current sensor, and the signal output end of the controller is connected with the driving motor to receive the current signal acquired by the current sensor and control the driving motor to rotate forward and reversely to drive the pressing plate to move upward and downward or be fixed. The pressing plate does not need to be reset to the initial highest position every time, the empty stroke distance is effectively shortened, and the efficiency of repeated cutting operation is improved.

Description

Technical Field

[0001] This application relates to the field of paper cutting apparatus, and more particularly to a paper cutter. Background Technology

[0002] As an automated paper cutting device, the electric paper cutter uses a motor driven by a sprocket and screw for transmission. Limit switches are installed at both ends of the pressure plate's movement path to control the downward pressing and releasing of the pressure plate during the cutting process. Specifically, the initial limit switch defines the standby position, and the pressing limit switch determines the termination position. During operation, the motor rotates forward to drive the pressure plate downward, and after each cut, the motor rotates in reverse to drive the pressure plate upward. Due to the slow screw transmission, the pressure plate must return to its initial position after each cut to trigger the limit switches before the next pressing and cutting can begin. This results in a long idle stroke during vertical movement, creating ineffective waiting time during continuous paper cutting operations and affecting cutting efficiency. Utility Model Content

[0003] This application aims to improve at least one technical problem in the background art.

[0004] This application provides a paper cutter, comprising a frame, a clamping assembly, a paper cutting assembly, and a control assembly. The frame is equipped with an operating table. The clamping assembly includes a drive motor, a transmission plate, and a pressure plate. The drive motor is mounted on the operating table and is connected to the transmission plate for driving the transmission plate to move left and right. The transmission plate is slidably connected to the pressure plate for moving the pressure plate up and down to clamp the paperboard. The paper cutting assembly is located on one side of the clamping assembly and is used to cut the paperboard. The control assembly includes a controller and a current sensor. The current sensor is electrically connected to the drive motor. The signal input terminal of the controller is connected to the current sensor, and the signal output terminal of the controller is connected to the drive motor. The controller receives the current signal acquired by the current sensor and controls the drive motor to rotate forward and backward according to the current signal to move or fix the pressure plate up and down.

[0005] The paper cutter provided in this application has at least the following beneficial effects:

[0006] After the paper cutting assembly finishes cutting the cardboard, the controller controls the pressure motor to run in reverse, causing the pressure plate to loosen and move up to a certain height and fix it. Compared with limit switches on the upper and lower parts of the transmission plate, when processing cardboard of the same thickness, the pressure plate does not need to be reset to the initial highest position every time, which effectively shortens the idle travel distance and improves the efficiency of repeated cutting operations.

[0007] According to some technical solutions of this application, the clamping assembly further includes a first sprocket, a second sprocket, a chain, and a first screw. The first sprocket is connected to the output end of the drive motor, and the first sprocket and the second sprocket are connected through the chain. One end of the first screw is fitted with the second sprocket, and the other end is threadedly connected to the transmission plate.

[0008] According to some technical solutions of this application, the frame is provided with a first protrusion, and the transmission plate is provided with a first guide groove arranged laterally, and the first protrusion is inserted into the first guide groove.

[0009] According to some technical solutions of this application, the transmission plate is provided with an inclined second guide groove and a vertically arranged third guide groove, and the pressure plate is provided with a first guide shaft and a second guide shaft, the first guide shaft being inserted into the second guide groove and the second guide shaft being inserted into the third guide groove.

[0010] According to some technical solutions of this application, the paper cutting assembly includes a paper cutting motor, a first gear, a second gear, a blade holder, and a cutter. The paper cutting motor is mounted on the operating table, the output end of the paper cutting motor is connected to the first gear, the second gear meshes with the first gear, the second gear is hinged to the blade holder, and the cutter is mounted on the blade holder.

[0011] According to some technical solutions of this application, the two ends of the frame are respectively provided with an arc-shaped guide groove and an inclined fourth guide groove, and the two ends of the tool holder are respectively provided with a third guide shaft and a fourth guide shaft. The third guide shaft is inserted into the arc-shaped guide groove, and the fourth guide shaft is inserted into the fourth guide groove.

[0012] According to some technical solutions of this application, the operating table is provided with a pressing slider, the pressing slider is slidably connected to the operating table, the operating table is provided with a guide groove, a limiting protrusion is provided below the pressing slider, the pressing slider is connected to the limiting protrusion, and one end of the limiting protrusion is inserted into the guide groove.

[0013] According to some technical solutions of this application, the pressing slider is further provided with a locking device, the pressing slider is provided with a receiving cavity, the locking device includes a knob part and a third screw, the knob part is provided on the pressing slider, one end of the third screw is fixedly connected to the knob part, and the other end extends into the receiving cavity and is threadedly connected to the limiting protrusion.

[0014] According to some technical solutions of this application, the rack is also provided with a reset button, which is electrically connected to the controller.

[0015] According to some technical solutions of this application, the pressing component, the paper cutting component and the control component are all provided with protective shells. Attached Figure Description

[0016] Figure 1 A perspective structural diagram of the paper cutter provided in the embodiments of this application;

[0017] Figure 2 A structural diagram of a paper cutter provided in an embodiment of this application;

[0018] Figure 3 This is a schematic diagram of the paper pressing assembly provided in an embodiment of this application from one perspective;

[0019] Figure 4 This is a schematic diagram of the paper pressing assembly provided in an embodiment of this application from another perspective;

[0020] Figure 5 This is a schematic diagram of the internal structure of the rack provided in an embodiment of this application;

[0021] Figure 6 This is a schematic diagram of the paper cutting assembly provided in an embodiment of this application from another perspective;

[0022] Figure 7 This is a structural schematic diagram of the paper cutting assembly provided in an embodiment of this application.

[0023] In the attached diagram: 100 - frame; 200 - clamping assembly; 210 - drive motor; 220 - transmission plate; 230 - pressure plate; 300 - paper cutting assembly; 510 - pressing slider; 520 - limiting protrusion; 210 - drive motor; 220 - transmission plate; 230 - pressure plate; 240 - first sprocket; 250 - second sprocket; 260 - first guide groove; 270 - first screw; 221 - second guide groove; 231-Second guide shaft; 232-Third guide groove; 110-Operating table; 111-Fifth guide groove; 112-First guide shaft; 120-First protrusion; 140-Arc-shaped guide groove; 150-Fourth guide groove; 160-Protective shell; 310-Paper cutting motor; 320-First gear; 330-Second gear; 340-Knife holder; 350-Cutter; 341-Third guide shaft; 342-Fourth guide shaft. Detailed Implementation

[0024] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having 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.

[0025] In the description of this application, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation or be constructed or operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0026] In the description of this utility model, unless otherwise explicitly defined, terms such as "set," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0027] The following is combined Figures 1 to 7 The embodiments of this utility model are described below.

[0028] This embodiment relates to a paper cutter. In the first embodiment, the paper cutter includes a frame 100, a clamping assembly 200, a paper cutting assembly 300, and a control assembly; the frame 100 is provided with an operating table 110.

[0029] The clamping assembly 200 includes a drive motor 210, a transmission plate 220, and a pressure plate 230. The drive motor 210 is mounted on the operating table 110 and is connected to the transmission plate 220 to drive the transmission plate 220 to move left and right. The transmission plate 220 is slidably connected to the pressure plate 230 to move the pressure plate 230 up and down to clamp the paperboard. By applying pressure to the paper, it ensures that the paper will not move during the cutting process. After cutting, it also ensures that the cut paper will not scatter.

[0030] The paper cutting assembly 300 is located on one side of the clamping assembly 200 and is used to cut the cardboard;

[0031] The control components include a controller and a current sensor. The current sensor is electrically connected to the drive motor 210. The signal input terminal of the controller is connected to the current sensor, and the signal output terminal of the controller is connected to the drive motor 210. The controller is used to receive the current signal obtained by the current sensor and control the drive motor 210 to rotate forward and backward according to the current signal so that the pressure plate 230 moves up and down or is fixed.

[0032] After the paper cutting assembly 300 completes the paperboard cutting, the controller detects the change in current of the drive motor 210. After the cutting is completed, the controller controls the paper pressing motor to run in reverse, causing the paper pressing plate to be released so that the paper pressing plate is moved up to a certain height and fixed.

[0033] The cardboard is placed on the operating table 110, and the drive motor 210 is started, which moves the transmission plate 220, thereby causing the pressure plate 230 to move up and down to press the cardboard. The paper cutting assembly 300 cuts the cardboard. After cutting, because the motor is stalled during operation, the current will increase. The current sensor detects the change in current of the drive motor 210 and transmits the signal to the controller. The controller controls the drive motor 210 to run in reverse according to the current signal, so that the pressure plate 230 moves up a certain height and is fixed.

[0034] Furthermore, by adopting the principle that the motor speed is constant, it can also be configured to record the speed of one working cycle to determine the thickness of the pressed paper, and when the cardboard is cut, the pressure plate 230 does not return to the initial position of the pressure plate 230, but only moves upward a certain distance.

[0035] For example, when the initial position of the pressure plate 230 is 40mm away from the table surface of the operating table 110, the motor speed is 290 revolutions, the gear ratio of the sprocket is 1.1, the tooth pitch of the screw is 1, the paper pressing height is 40mm, the motor drives the screw to rotate, and the screw moves 1mm for every revolution of the motor. That is to say, it takes 8 seconds for the pressure plate 230 to move 40mm and the motor to rotate 40 revolutions.

[0036] In the traditional limit switch operating mode, after each pressing operation, the motor needs to drive the pressure head to retract a full 40mm stroke to return to the initial state. Then, it needs to travel another 40mm downward distance before the next cutting operation, resulting in an 80mm stroke in total, requiring 16 seconds. This reciprocating motion mechanism is inefficient when handling thinner cardboard or cardboard of the same cutting height. The return stroke generates a significant amount of wasted travel, leading to a longer overall waiting time and reduced cutting efficiency.

[0037] When using the improved paper cutter, when repeatedly cutting 5mm high cardboard, the controller is configured to reverse the motor for 2 seconds and stop after detecting stall current, so that the pressure plate 230 returns to a height of 10mm. If the first paper cut is 5mm thick, since the height of the pressure plate 230 from the operating table 110 is 40mm, it needs to travel 35mm to press the cardboard. The motor rotates 35 times in 3.5 seconds to achieve the force to press the paper. At this time, the motor stops rotating. That is to say, it takes 3.5 seconds for the motor to start and stop. When the paper cutting is completed, the paper pressing motor reverses for 2 seconds and stops. After the cutting is completed, it only rotates in reverse to move the pressure plate 230 by 10mm, leaving 5mm for the new cardboard to be placed.

[0038] In this way, after the paper is cut, the pressure motor reverses and releases the pressure plate. At this point, the pressure plate rises 10mm and stops. When a second pressing cut is needed, the motor only needs to run for 1 second to execute an effective stroke of 5mm to fix the paper. This shortens the straight-line distance for the next cutting operation, thereby improving work efficiency. The single cycle stroke is reduced from the original unnecessary idle stroke to 10mm, significantly shortening the motor running time and significantly improving the equipment's processing and cutting efficiency.

[0039] In other words, traditional paper cutters use limit switches to control the reset of the pressure plate 230. After each cut, the pressure plate 230 needs to return to its initial highest position, resulting in a long idle stroke, excessive time consumption, and reduced work efficiency. Compared to the traditional limit switch control method, this embodiment eliminates the need for a lower limit switch when processing paperboard of the same thickness. Instead, it controls the movement of the pressure plate 230 based on the current changes of the drive motor 210, reducing unnecessary reset strokes, improving the paper cutter's work efficiency, effectively shortening the idle stroke distance, and enhancing the efficiency of repetitive cutting operations.

[0040] In some embodiments, the clamping assembly 200 further includes a first sprocket 240, a second sprocket 250, a chain, and a first screw 270. The first sprocket 240 is connected to the output end of the drive motor 210, and the first sprocket 240 and the second sprocket 250 are connected by the chain. One end of the first screw 270 is fitted with the second sprocket 250, and the other end is threadedly connected to the transmission plate 220. In use, the drive motor 210 operates, causing the first sprocket 240 connected to the output end to rotate. The first sprocket 240 drives the second sprocket 250 to rotate via the chain, causing the second sprocket 250 to drive the first screw 270 fitted at one end to rotate. The rotation of the screw pushes the transmission plate 220 to move left and right, thereby causing the pressure plate 230 to move.

[0041] The transmission plate 220 is provided with an inclined second guide groove 221 and a vertically arranged third guide groove 232. The pressure plate 230 is provided with a first guide shaft 112 and a second guide shaft 231. The first guide shaft 112 is inserted into the second guide groove 221, and the second guide shaft 231 is inserted into the third guide groove 232. When the transmission plate 220 moves left and right, the first guide shaft 112 slides in the second guide groove 221, and the second guide shaft 231 slides in the third guide groove 232. Through the guiding action of the guide grooves on the transmission plate 220, the pressure plate 230 is driven to move up and down, while ensuring the stability of the movement of the pressure plate 230.

[0042] For example, inclined grooves are provided on both sides. Since there are inclined grooves on the transmission plate 220, the inclined grooves push the pressure plate to move up and down, thereby pressing and releasing the plate. The structure is simple and the transmission is stable.

[0043] If the transmission plate 220 lacks effective guidance during movement, it is prone to deviation, affecting the clamping effect of the pressure plate 230 and the paper cutting accuracy. Therefore, the frame 100 is provided with a first protrusion 120, and the transmission plate 220 is provided with a horizontally arranged first guide groove 260, into which the first protrusion 120 is inserted. By utilizing the cooperation of the first protrusion 120 and the horizontal first guide groove 260, the movement direction of the transmission plate 220 is restricted, allowing it to move only left and right.

[0044] In some embodiments, the paper cutting assembly 300 includes a paper cutting motor 310, a first gear 320, a second gear 330, a blade holder 340, and a cutter 350. The paper cutting motor 310 is mounted on the operating table 110. The output end of the paper cutting motor 310 is connected to the first gear 320. The second gear 330 meshes with the first gear 320 and is hinged to the blade holder 340. The cutter 350 is mounted on the blade holder 340. In use, the paper cutting motor 310 starts, driving the first gear 320 connected to the output end to rotate. The first gear 320 drives the second gear 330, which meshes with it, to rotate. The second gear 330, through a hinge connection, drives the blade holder 340 to move. During the movement, the blade holder 340 supports the cutter 350 downwards, thereby cutting the cardboard.

[0045] Furthermore, the frame 100 is provided with an arc-shaped guide groove 140 and an inclined fourth guide groove 150 at both ends, and the tool holder 340 is provided with a third guide shaft 341 and a fourth guide shaft 342 at both ends, with the third guide shaft 341 inserted into the arc-shaped guide groove 140 and the fourth guide shaft 342 inserted into the fourth guide groove 150.

[0046] During the movement of the drive tool holder 340, the third guide shaft 341 on the tool holder 340 slides within the arc-shaped guide groove 140, and the fourth guide shaft 342 slides within the fourth guide groove 150. Through the guiding effect of the guide grooves on both sides, the tool holder 340 achieves the oblique cutting action. Thus, by utilizing the cooperation between the arc-shaped guide groove 140 and the fourth guide groove 150 with the third guide shaft 341 and the fourth guide shaft 342, the cutting blade 350 experiences more uniform force during cutting, reducing cutting resistance. This provides stable guidance for the oblique cutting action of the tool holder 340, ensuring that the tool holder 340 moves along the predetermined trajectory and guaranteeing cutting quality.

[0047] In some specific embodiments, the paper cutting assembly 300 is located on the rear side of the operating table 110. After cutting, the fragments are easy to scatter. Therefore, the tail of the paper cutter is also provided with a collection groove. During the paper cutting process, the cut fragments will fall into the collection groove at the tail of the paper cutter, which facilitates the collection and cleaning of the cut paper fragments.

[0048] In some embodiments, the operating table 110 is provided with a pressing slider 510, which is slidably connected to the operating table 110. The operating table 110 is provided with a fifth guide groove 111, and a limiting protrusion 520 is provided below the pressing slider 510. The pressing slider 510 is connected to the limiting protrusion 520, and one end of the limiting protrusion 520 is inserted into the fifth guide groove 111. Paper is placed on the operating table 110, and the pressing slider 510 is moved along the length direction of the fifth guide groove 111 to press against the outer edge of the paper. The paper is stacked and aligned flat. By sliding the pressing slider 510 on the operating table 110, the paper is pressed against, ensuring the accuracy of cutting. At the same time, the paper can be pushed in to adjust the position of the paper cutting nozzle, which facilitates the control of the paper size.

[0049] In some embodiments, the abutting slider 510 is further provided with a locking device. The abutting slider 510 has a receiving cavity. The locking device includes a knob and a third screw. The knob is located on the abutting slider 510. One end of the third screw is fixedly connected to the knob, and the other end extends into the receiving cavity and is threadedly connected to the limiting protrusion 520. In use, after moving the abutting slider 510 to a suitable position, the knob is tightened. The knob drives the third screw to rotate, and the third screw is threadedly connected to the limiting protrusion 520, thereby fixing the abutting slider 510 at a certain position in the guide groove.

[0050] In some embodiments, the frame 100 is also equipped with a reset button, which is electrically connected to the controller. When it is necessary to return the pressure plate 230 to its initial state, pressing the reset button transmits a signal to the controller, which then controls the drive motor 210 to operate, returning the pressure plate 230 to its initial height for easy pressing at another paper feeding height. Therefore, the return operation of the pressure plate 230 is facilitated, improving the flexibility and efficiency of the paper cutter.

[0051] In some embodiments, the clamping assembly 200, the paper cutting assembly 300, and the control assembly are all provided with protective housings 160. By protecting the internal components from external damage, the service life and operational safety of the paper cutter are improved.

[0052] The preferred embodiments of the present invention have been described in detail above, but the present disclosure is not limited to the embodiments described. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and these equivalent modifications or substitutions are all included within the scope defined by the claims of the present disclosure.

Claims

1. A paper cutter, characterized in that: include: A frame (100) is provided with an operating table (110); The pressing assembly (200) includes a drive motor (210), a transmission plate (220), and a pressure plate (230). The drive motor (210) is mounted on the operating table (110). The drive motor (210) is connected to the transmission plate (220) for driving the transmission plate (220) to move left and right. The transmission plate (220) is slidably connected to the pressure plate (230) for moving the pressure plate (230) up and down to press the cardboard. A paper cutting assembly (300), disposed on one side of the clamping assembly (200), is used to cut the cardboard; The control component includes a controller and a current sensor. The current sensor is electrically connected to the drive motor (210). The signal input terminal of the controller is connected to the current sensor, and the signal output terminal of the controller is connected to the drive motor (210). The controller is used to receive the current signal acquired by the current sensor and control the drive motor (210) to rotate forward and backward according to the current signal so that the pressure plate (230) moves up and down or is fixed.

2. The paper cutter according to claim 1, characterized in that: The clamping assembly (200) further includes a first sprocket (240), a second sprocket (250), a chain, and a first screw (270). The first sprocket (240) is connected to the output end of the drive motor (210). The first sprocket (240) and the second sprocket (250) are connected by the chain. One end of the first screw (270) is fitted with the second sprocket (250), and the other end is threadedly connected to the transmission plate (220).

3. The paper cutter according to claim 2, characterized in that: The frame (100) is provided with a first protrusion (120), and the transmission plate (220) is provided with a first guide groove (260) arranged laterally, and the first protrusion (120) is inserted into the first guide groove (260).

4. The paper cutter according to claim 2, characterized in that: The transmission plate (220) is provided with an inclined second guide groove (221) and a first guide shaft (112), and the pressure plate (230) is provided with a second guide shaft (231) and a vertically arranged third guide groove (232). The first guide shaft (112) is inserted into the second guide groove (221), and the second guide shaft (231) is inserted into the third guide groove (232).

5. The paper cutter according to claim 4, characterized in that: The paper cutting assembly (300) includes a paper cutting motor (310), a first gear (320), a second gear (330), a blade holder (340), and a cutter (350). The paper cutting motor (310) is mounted on the operating table (110). The output end of the paper cutting motor (310) is connected to the first gear (320). The second gear (330) meshes with the first gear (320). The second gear (330) is hinged to the blade holder (340). The cutter (350) is mounted on the blade holder (340).

6. The paper cutter according to claim 5, characterized in that: The frame (100) is provided with an arc-shaped guide groove (140) and an inclined fourth guide groove (150) at both ends. The tool holder (340) is provided with a third guide shaft (341) and a fourth guide shaft (342) at both ends. The third guide shaft (341) is inserted into the arc-shaped guide groove (140), and the fourth guide shaft (342) is inserted into the fourth guide groove (150).

7. The paper cutter according to claim 1, characterized in that: The operating table (110) is provided with a pressing slider (510), which is slidably connected to the operating table (110). The operating table (110) is provided with a fifth guide groove (111). A limiting protrusion (520) is provided below the pressing slider (510). The pressing slider (510) is connected to the limiting protrusion (520), and one end of the limiting protrusion (520) is inserted into the fifth guide groove (111).

8. The paper cutter according to claim 7, characterized in that: The pressing slider (510) is also provided with a locking device. The pressing slider (510) has a receiving cavity. The locking device includes a knob and a third screw. The knob is located on the pressing slider (510). One end of the third screw is fixedly connected to the knob, and the other end extends into the receiving cavity and is threadedly connected to the limiting protrusion (520).

9. The paper cutter according to claim 1, characterized in that: The frame (100) is also provided with a reset button, which is electrically connected to the controller.

10. The paper cutter according to claim 1, characterized in that: The pressing assembly (200), the paper cutting assembly (300), and the control assembly are all provided with protective shells (160).

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