Paper pressing device for nozzle protection

Abstract

The utility model relates to a paper pressing device for spray head protection. The paper pressing device for nozzle protection comprises a first paper pressing plate, a second paper pressing plate, a first transverse pushing mechanism and a supporting rack. The first paper pressing plate and the second paper pressing plate are arranged in parallel; the first paper pressing plate is connected with the first transverse pushing mechanism, and the first transverse pushing mechanism is installed on the supporting rack. The second paper pressing plate is connected with the supporting rack; the bottom face of the first paper pressing plate and the bottom face of the second paper pressing plate are located on the same plane. The paper pressing device for nozzle protection has the advantage that the printing nozzle is well protected through the paper pressing plate.

Description

Technical Field

[0001] The present application relates to the field of printing technology, and in particular to a paper pressing device for protecting a nozzle. Background Art

[0002] Cardboard is also called paperboard. It is a thick paper sheet made of various pulps and interwoven with fibers. The difference between cardboard and paper is usually distinguished by basis weight and thickness. Generally, paper with a basis weight of more than 250g / m2 and a thickness of more than 0.5mm is called cardboard (in other words: paper with a thickness of more than 0.1mm is generally called cardboard. Generally, paper with a basis weight of less than 250g / m2 is considered paper, and paper with a basis weight of 250g / m2 or more is considered cardboard).

[0003] Packaging and printing are important means and ways to increase product added value and enhance product competitiveness. Printing operations are performed on some cardboards.

[0004] During conventional cardboard printing, the print head is located above the cardboard, and the cardboard is placed below the print head by horizontal transportation. Therefore, when the cardboard has a problem of warping corners, the cardboard will scratch the print head.

[0005] Therefore, in the prior art cardboard printing technology, the protection of the printing nozzle is not good enough. Utility Model Content

[0006] Based on this, the purpose of the present application is to provide a paper pressing device for nozzle protection, which has the advantage of better protecting the printing nozzle by pressing the paper.

[0007] In one aspect of the present application, there is provided a paper pressing device for nozzle protection, comprising a first paper pressing board, a second paper pressing board, a first lateral pushing mechanism, and a supporting frame;

[0008] The first paperboard and the second paperboard are arranged in parallel;

[0009] The first paper pressing plate is connected to the first transverse pushing mechanism, and the first transverse pushing mechanism is installed on the supporting frame;

[0010] The second paperboard is connected to the supporting frame;

[0011] The bottom surface of the first paperboard and the bottom surface of the second paperboard are in the same plane.

[0012] The paper pressing device for nozzle protection described in the present application presses down the paperboard through the first paper pressing plate and the second paper pressing plate respectively, thereby pressing the paperboard tightly on the conveyor belt to prevent the corners or edges of the paperboard from warping, thereby effectively ensuring the flatness of the paperboard, so that the paperboard will not scratch the printing nozzle, effectively ensuring the safety of the printing nozzle. The first lateral pushing mechanism is used to drive the movement of the first paper pressing plate, so that the distance between the first paper pressing plate and the second paper pressing plate can be adjusted.

[0013] Furthermore, it also includes a second lateral pushing mechanism, which is installed on the supporting frame, and the second paper pressing board is connected to the supporting frame through the second lateral pushing mechanism.

[0014] Furthermore, the first lateral pushing mechanism includes a first synchronous belt, a first reducer, a first synchronous wheel, and a first connecting shell;

[0015] The first synchronous wheels are respectively sleeved at both ends of the first synchronous belt, and the first connecting shell is installed on the first synchronous belt; the first reducer is driven by a motor and installed on the supporting frame; one end of the first pressing paperboard is installed on the first connecting shell;

[0016] The second lateral pushing mechanism includes a second synchronous belt, a second reducer, a second synchronous wheel, and a second connecting shell;

[0017] The second synchronous wheels are respectively sleeved at both ends of the second synchronous belt, and the second connecting shell is installed on the second synchronous belt; the second reducer is driven by a motor and installed on the supporting frame; one end of the second pressing paperboard is installed on the second connecting shell;

[0018] The output end of the first reducer is rotationally connected to the first synchronous wheel, and the second synchronous wheel is rotationally connected to the first reducer; the output end of the second reducer is rotationally connected to the second synchronous wheel, and the first synchronous wheel is rotationally connected to the second reducer.

[0019] Furthermore, the first synchronous wheel and the second synchronous wheel are coaxial.

[0020] Furthermore, it also includes a first guide rail, a first slider, a second guide rail, and a second slider;

[0021] The first sliding block is fixed on the top surface of the first connecting shell and is slidably connected to the first guide rail;

[0022] The second sliding block is fixed on the top surface of the second connecting shell and is slidably connected to the second guide rail;

[0023] The first guide rail and the second guide rail are respectively fixedly assembled and connected to the supporting frame.

[0024] Furthermore, it also includes a first limit sensor and a second limit sensor;

[0025] The two first limit sensors are respectively installed on the supporting frame and are respectively placed at the two ends of the first guide rail; the two second limit sensors are respectively installed on the supporting frame and are respectively placed at the two ends of the second guide rail.

[0026] Furthermore, it also includes a first slot switch, a second slot switch, a first detection sheet, and a second detection sheet;

[0027] The two first slot switches are respectively mounted on the supporting frame and are respectively placed at the two ends of the first guide rail; the two second slot switches are respectively mounted on the supporting frame and are respectively placed at the two ends of the second guide rail;

[0028] The first detection piece is mounted on the first connection shell, the first slot switch is movably matched with the first detection piece, and the first slot switch is used to detect a passing signal of the first detection piece;

[0029] The second detection piece is mounted on the second connection shell, the second slot switch is movably matched with the second detection piece, and the second slot switch is used to detect a passing signal of the second detection piece.

[0030] Furthermore, the first paperboard includes a first straight plate segment and a first inclined plate segment, and the second paperboard includes a second straight plate segment and a second inclined plate segment;

[0031] The end of the first straight plate segment is fixed to one end of the first inclined plate segment, and the other end of the first inclined plate is mounted on the first lateral pushing mechanism;

[0032] The end of the second straight plate segment is fixed to one end of the second inclined plate segment, and the other end of the second inclined plate segment is mounted on the second lateral pushing mechanism;

[0033] The first straight plate segment is arranged in parallel with the second straight plate segment, and the bottom surface of the first straight plate segment and the bottom surface of the second straight plate segment are on the same plane.

[0034] Furthermore, it also includes an auxiliary pressing plate, which is installed at the bottom of the supporting frame;

[0035] The auxiliary pressing plate comprises a flat plate and an inclined plate, and the edges of the flat plate are spliced ​​with the edges of the inclined plate;

[0036] The bottom surface of the first straight plate segment, the bottom surface of the second straight plate segment, and the bottom surface of the plane plate are on the same plane.

[0037] Furthermore, it also includes a bottom surface detection sensor and an inclined surface detection sensor; the bottom surface detection sensor and the inclined surface detection sensor are respectively installed on the supporting frame;

[0038] The bottom surface of the flat plate is formed with a detection groove along its length direction; the emitter and the receiver of the bottom surface detection sensor are respectively placed at two ends of the auxiliary pressing plate;

[0039] The emitter and the receiver of the inclined plane detection sensor are respectively arranged at two ends of the inclined plane.

[0040] For better understanding and implementation, the present application is described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 This is a schematic diagram of the three-dimensional structure of an exemplary paper pressing device for nozzle protection in this application;

[0042] Figure 2 A schematic diagram of a three-dimensional structure of an exemplary paper pressing device for nozzle protection in the present application from another perspective;

[0043] Figure 3 A side view of an exemplary paper pressing device for nozzle protection of the present application;

[0044] Figure 4 It is a front view of the assembly structure of the first lateral pushing mechanism, the second lateral pushing mechanism, the guide rail, and the sliding block exemplarily used in the present application;

[0045] Figure 5 A side view of an exemplary auxiliary pressing plate of the present application;

[0046] Figure 6 This is a schematic diagram of the three-dimensional structure of an exemplary auxiliary pressing plate of the present application;

[0047] Figure 7 It is a schematic three-dimensional structural diagram of an exemplary assembly structure of a first paperboard, a first connecting shell, and a first sliding block of the present application. DETAILED DESCRIPTION

[0048] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating positions or positional relationships, are based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In the description of the present application, unless otherwise specified, "multiple" means two or more.

[0049] See also Figure 1-7 , an exemplary paper pressing device for nozzle protection of the present application includes a first paper pressing board 10, a second paper pressing board 20, a first lateral pushing mechanism 30, and a supporting frame 40;

[0050] The first paperboard 10 and the second paperboard 20 are arranged in parallel;

[0051] The first paperboard 10 is connected to the first lateral pushing mechanism 30, and the first lateral pushing mechanism 30 is installed on the supporting frame 40;

[0052] The second paperboard 20 is connected to the supporting frame 40;

[0053] The bottom surface of the first paperboard 10 and the bottom surface of the second paperboard 20 are in the same plane.

[0054] The paper pressing device for nozzle protection described in the present application presses down the paperboard through the first paper pressing plate 10 and the second paper pressing plate 20 respectively, so as to press the paperboard tightly on the conveyor belt to prevent the corners or edges of the paperboard from warping, thereby effectively ensuring the flatness of the paperboard, so that the paperboard will not scratch the printing nozzle, effectively ensuring the safety of the printing nozzle. The first lateral pushing mechanism 30 is used to drive the movement of the first paper pressing plate 10, so as to adjust the distance between the first paper pressing plate 10 and the second paper pressing plate 20.

[0055] In the present application, the conveyor belt is located below the support frame 40, the printing mechanism is located on one side of the support frame 40, and a print head is provided on the printing mechanism, so that the print head is located on one side of the support frame 40, and the printing mechanism and the support frame 40 are respectively located above the conveyor belt. In the transport state, the cardboard moves laterally following the conveyor belt, and the cardboard first contacts the bottom of the printer frame, and then the two sides of the cardboard are pressed down by the first cardboard pressing board 10 and the second cardboard pressing board 20 respectively, so that the cardboard is stably and steadily pressed on the conveyor belt. In some examples, the print head is located above the middle of the first cardboard pressing board 10 and the second cardboard pressing board 20, so when the cardboard is pressed, the print head prints on the cardboard, and at this time, the flatness of the cardboard prevents the cardboard from directly contacting the print head, thereby avoiding the print head from being scratched.

[0056] Since the first transverse pushing mechanism 30 can drive the movement of the first paperboard 10 , the distance between the first paperboard 10 and the second paperboard 20 can be adjusted, so that it can be suitable for printing operations on paperboards of different sizes.

[0057] In some preferred embodiments, a second lateral pushing mechanism 50 is further included. The second lateral pushing mechanism 50 is installed on the supporting frame 40 , and the second paperboard 20 is connected to the supporting frame 40 via the second lateral pushing mechanism 50 .

[0058] The second lateral pushing mechanism 50 is provided so that the second paperboard 20 can also be moved and adjusted laterally. The first lateral pushing mechanism 30 and the second lateral pushing mechanism 50 operate independently, so that the movement of the first paperboard 10 and the movement of the second paperboard 20 are independent.

[0059] In some preferred embodiments, the first lateral pushing mechanism 30 includes a first synchronous belt 31, a first reducer 32, a first synchronous wheel 33, and a first connecting shell 34;

[0060] The first synchronous wheels 33 are respectively sleeved at both ends of the first synchronous belt 31, and the first connecting shell 34 is installed on the first synchronous belt 31; the first reducer 32 is driven by a motor and installed on the supporting frame 40; one end of the first pressing paperboard 10 is installed on the first connecting shell 34;

[0061] The second lateral pushing mechanism 50 includes a second synchronous belt 51, a second reducer 52, a second synchronous wheel 53, and a second connecting shell 54;

[0062] The second synchronous wheels 53 are respectively sleeved at both ends of the second synchronous belt 51, and the second connecting shell 54 is installed on the second synchronous belt 51; the second reducer 52 is driven by a motor and installed on the supporting frame 40; one end of the second press paper 20 is installed on the second connecting shell 54;

[0063] The output end of the first reducer 32 is rotationally connected to the first synchronous wheel 33 thereof, and the second synchronous wheel 53 is rotationally connected to the first reducer 32; the output end of the second reducer 52 is rotationally connected to the second synchronous wheel 53 thereof, and the first synchronous wheel 33 is rotationally connected to the second reducer 52.

[0064] In some preferred embodiments, the first synchronous wheel 33 and the second synchronous wheel 53 are coaxial.

[0065] One of the first synchronous wheels 33 is tightly sleeved on the output shaft of the first reducer 32, and one of the second synchronous wheels 53 is slidably sleeved on the rotating shaft of the first reducer 32. Although the first synchronous wheel 33 and the second synchronous wheel 53 are coaxial, the first reducer 32 can only drive the first synchronous wheel 33 to rotate; at the same time, another first synchronous wheel 33 is slidably sleeved on the rotating shaft of the second reducer 52, and another second synchronous wheel 53 is tightly sleeved on the output shaft of the second reducer 52, and the second reducer 52 can only drive the second synchronous wheel 53 to rotate. The sliding sleeve connection here can be achieved by bearings. Therefore, the rotation of the first synchronous wheel 33 and the rotation of the second synchronous wheel 53 are independent.

[0066] In the example of the drawings, the first connecting shell 34 and the second connecting shell 54 are both hollow structures, and the first synchronous belt 31 moves through the first connecting shell 34 , and the second synchronous belt 51 moves through the second connecting shell 54 .

[0067] In some preferred embodiments, it further includes a first guide rail 61, a first slider 63, a second guide rail 62, and a second slider 64;

[0068] The first sliding block 63 is fixed on the top surface of the first connecting shell 34 and is slidably connected to the first guide rail 61;

[0069] The second sliding block 64 is fixed on the top surface of the second connecting shell 54 and is slidably connected to the second guide rail 62;

[0070] The first guide rail 61 and the second guide rail 62 are respectively fixedly assembled and connected to the supporting frame 40 .

[0071] In some preferred embodiments, a first limit sensor 71 and a second limit sensor 72 are further included;

[0072] The two first limit sensors 71 are respectively installed on the supporting frame 40 and are respectively placed at the two ends of the first guide rail 61 ; the two second limit sensors 72 are respectively installed on the supporting frame 40 and are respectively placed at the two ends of the second guide rail 62 .

[0073] The first guide rail 61 is used to limit the movement direction of the first slider 63, and the first slider 63 is used to assist and limit the movement direction of the first connecting shell 34; the second guide rail 62 is used to limit the movement direction of the second slider 64, and the second slider 64 is used to assist and limit the movement direction of the second connecting shell 54.

[0074] In some preferred embodiments, it further includes a first slot switch 73, a second slot switch 74, a first detection sheet 75, and a second detection sheet 76;

[0075] The two first slot switches 73 are respectively mounted on the supporting frame 40 and are respectively placed at the two ends of the first guide rail 61; the two second slot switches 74 are respectively mounted on the supporting frame 40 and are respectively placed at the two ends of the second guide rail 62;

[0076] The first detection piece 75 is mounted on the first connection shell 34, the first slot switch 73 is movably matched with the first detection piece 75, and the first slot switch 73 is used to detect the passing signal of the first detection piece 75;

[0077] The second detection piece 76 is mounted on the second connection shell 54 , the second slot switch 74 is movably matched with the second detection piece 76 , and the second slot switch 74 is used to detect a passing signal of the second detection piece 76 .

[0078] It should be noted that, in the drawings, the connection structure between the first guide rail 61, the second guide rail 62 and the support frame 40 is not shown, but it does not mean that there is no assembly relationship between the two. At the same time, the connection structure between the first slot switch 73, the second slot switch 74 and the support frame 40 is not shown in the drawings, and the connection structure is hidden. This is to better express the assembly position of the first slot switch 73, the second slot switch 74 in the drawings, and does not mean that they have no connection relationship with the support frame 40.

[0079] The principle and function of several limit sensors of the present application are that they will not work normally, that is, they will not hit each other; only when abnormal, the connecting shell hits or the slider hits the limit sensor, and the connecting shell can only move in the opposite direction.

[0080] The principles and functions of several slot switches of the present application are to reset or determine the position of the paperboard.

[0081] In some preferred embodiments, the first paperboard 10 includes a first straight plate segment 11 and a first inclined plate segment 12, and the second paperboard 20 includes a second straight plate segment and a second inclined plate segment;

[0082] The end of the first straight plate section 11 is fixed to one end of the first inclined plate section 12, and the other end of the first inclined plate is mounted on the first lateral pushing mechanism 30;

[0083] The end of the second straight plate segment is fixed to one end of the second inclined plate segment, and the other end of the second inclined plate segment is mounted on the second lateral pushing mechanism 50;

[0084] The first straight plate segment 11 is arranged in parallel with the second straight plate segment, and the bottom surface of the first straight plate segment 11 and the bottom surface of the second straight plate segment are on the same plane.

[0085] In some preferred embodiments, an auxiliary pressing plate 80 is further included, and the auxiliary pressing plate 80 is installed at the bottom of the supporting frame 40;

[0086] The auxiliary pressing plate 80 includes a flat plate 81 and an inclined plate 82, and the edges of the flat plate are spliced ​​with the edges of the inclined plate 82;

[0087] The bottom surface of the first straight plate segment 11 , the bottom surface of the second straight plate segment, and the bottom surface of the planar plate 81 are on the same plane.

[0088] In some preferred embodiments, a bottom surface detection sensor B1 and an inclined surface detection sensor B2 are further included; the bottom surface detection sensor B1 and the inclined surface detection sensor B2 are respectively mounted on the support frame 40;

[0089] The bottom surface of the flat plate 81 is formed with a detection groove M along its length direction; the emitter and the receiver of the bottom surface detection sensor B1 are respectively placed at the two ends of the auxiliary pressure plate 80;

[0090] The emitter and the receiver of the slope detection sensor B2 are respectively placed at two ends of the slope plate 82 .

[0091] The detection groove M is used to detect the warped edge or angle of the cardboard when it passes through. When the cardboard passes through the auxiliary pressure plate 80, if the cardboard has a warped edge or angle, it will enter the detection groove M and be detected by the bottom surface detection sensor B1. The inclined surface detection sensor B2 of the present application is used to detect the state of the cardboard before it enters the auxiliary pressure plate 80. If the angle is too high to enter the bottom of the auxiliary pressure plate 80, it will be detected and an alarm will be issued, and even the controller will send a control signal to stop the conveyor belt from conveying the cardboard.

[0092] In the present application, the first lateral pushing mechanism 30 and the second lateral pushing mechanism 50 operate independently, so that the first paperboard 10 and the second paperboard 20 move independently. In some examples, the position of the first paperboard 10 is adjustable and the second paperboard 20 is fixed; in other examples, the positions of the first paperboard 10 and the second paperboard 20 are both adjustable.

[0093] In the present application, the cardboard is transported horizontally on the conveyor belt, and one side of the cardboard first contacts the auxiliary pressing plate 80, and then the cardboard is pressed on the conveyor belt by the auxiliary pressing plate 80; after that, the two sides of the cardboard contact the first pressing plate 10 and the second pressing plate 20 respectively, and the cardboard is pressed down by the first pressing plate 10 and the second pressing plate 20 respectively to be pressed and flattened and placed on the conveyor belt. The print head is located above the middle of the first pressing plate 10 and the second pressing plate 20, and the printing operation is performed while pressing the paper. At this time, the cardboard is stable and will not contact the print head, thereby effectively protecting the safety of the print head.

[0094] In addition, in the present application, the paper pressing is achieved by changing the distance between the upper surface of the paperboard and the conveyor belt, while the distances between the first paperboard pressing 10, the second paperboard pressing 20, and the auxiliary bottom plate and the conveyor belt in the height direction remain unchanged. In other words, before the paper pressing, the distance between the upper surface of the paperboard and the upper surface of the conveyor belt is relatively large, and after the paper pressing, the distance is limited and reduced.

[0095] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent application. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application.

Claims

1. A paper pressing device for nozzle protection, Features: It includes a first paperboard, a second paperboard, a first lateral pushing mechanism, and a supporting frame; The first paperboard and the second paperboard are arranged in parallel; The first paper pressing plate is connected to the first transverse pushing mechanism, and the first transverse pushing mechanism is installed on the supporting frame; The second paperboard is connected to the supporting frame; The bottom surface of the first paperboard and the bottom surface of the second paperboard are in the same plane.

2. The paper pressing device for nozzle protection according to claim 1, Features: It also includes a second lateral pushing mechanism, which is installed on the supporting frame, and the second paper pressing board is connected to the supporting frame through the second lateral pushing mechanism.

3. The paper pressing device for nozzle protection according to claim 2, Features: The first lateral pushing mechanism includes a first synchronous belt, a first reducer, a first synchronous wheel, and a first connecting shell; The first synchronous wheels are respectively sleeved at both ends of the first synchronous belt, and the first connecting shell is installed on the first synchronous belt; The first reducer is driven by a motor and mounted on the support frame; one end of the first paperboard is mounted on the first connecting shell; The second lateral pushing mechanism includes a second synchronous belt, a second reducer, a second synchronous wheel, and a second connecting shell; The second synchronous wheels are respectively sleeved at both ends of the second synchronous belt, and the second connecting shell is installed on the second synchronous belt; the second reducer is driven by a motor and installed on the supporting frame; one end of the second pressing paperboard is installed on the second connecting shell; The output end of the first reducer is rotationally connected to the first synchronous wheel, and the second synchronous wheel is rotationally connected to the first reducer; the output end of the second reducer is rotationally connected to the second synchronous wheel, and the first synchronous wheel is rotationally connected to the second reducer.

4. The paper pressing device for nozzle protection according to claim 3, Features: The first synchronous wheel and the second synchronous wheel are coaxial.

5. The paper pressing device for nozzle protection according to claim 3, Features: It also includes a first guide rail, a first slider, a second guide rail, and a second slider; The first sliding block is fixed on the top surface of the first connecting shell and is slidably connected to the first guide rail; The second sliding block is fixed on the top surface of the second connecting shell and is slidably connected to the second guide rail; The first guide rail and the second guide rail are respectively fixedly assembled and connected to the supporting frame.

6. The paper pressing device for nozzle protection according to claim 5, Features: Also includes a first limit sensor and a second limit sensor; The two first limit sensors are respectively installed on the supporting frame and are respectively placed at the two ends of the first guide rail; the two second limit sensors are respectively installed on the supporting frame and are respectively placed at the two ends of the second guide rail.

7. The paper pressing device for nozzle protection according to claim 6, Features: It also includes a first slot switch, a second slot switch, a first detection sheet, and a second detection sheet; The two first slot switches are respectively mounted on the supporting frame and are respectively placed at the two ends of the first guide rail; the two second slot switches are respectively mounted on the supporting frame and are respectively placed at the two ends of the second guide rail; The first detection piece is mounted on the first connection shell, the first slot switch is movably matched with the first detection piece, and the first slot switch is used to detect a passing signal of the first detection piece; The second detection piece is mounted on the second connection shell, the second slot switch is movably matched with the second detection piece, and the second slot switch is used to detect a passing signal of the second detection piece.

8. The paper pressing device for nozzle protection according to any one of claims 2 to 7, Features: The first paperboard comprises a first straight plate segment and a first inclined plate segment, and the second paperboard comprises a second straight plate segment and a second inclined plate segment; The end of the first straight plate segment is fixed to one end of the first inclined plate segment, and the other end of the first inclined plate is mounted on the first lateral pushing mechanism; The end of the second straight plate segment is fixed to one end of the second inclined plate segment, and the other end of the second inclined plate segment is mounted on the second lateral pushing mechanism; The first straight plate segment is arranged in parallel with the second straight plate segment, and the bottom surface of the first straight plate segment and the bottom surface of the second straight plate segment are on the same plane.

9. The paper pressing device for nozzle protection according to claim 8, Features: Also included is an auxiliary pressing plate, which is mounted on the bottom of the supporting frame; The auxiliary pressing plate comprises a flat plate and an inclined plate, and the edges of the flat plate are spliced ​​with the edges of the inclined plate; The bottom surface of the first straight plate segment, the bottom surface of the second straight plate segment, and the bottom surface of the plane plate are on the same plane.

10. The paper pressing device for nozzle protection according to claim 9, Features: It also includes a bottom surface detection sensor and an inclined surface detection sensor; the bottom surface detection sensor and the inclined surface detection sensor are respectively mounted on the supporting frame; The bottom surface of the flat plate is formed with a detection groove along its length direction; the emitter and the receiver of the bottom surface detection sensor are respectively placed at two ends of the auxiliary pressing plate; The emitter and the receiver of the inclined plane detection sensor are respectively arranged at two ends of the inclined plane.

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