Paper cutter with safe knife replacement

Abstract

The utility model relates to a paper cutter for safely replacing a cutter, comprising: a frame, and a paper loading platform, a paper pushing mechanism, a paper pressing mechanism, and a cutting mechanism respectively mounted on the frame. The cutting mechanism comprises: a driver, a knife holder, a cutter, and an auxiliary tool. The knife holder is provided with a mounting hole and an L-shaped slide groove located on the mounting hole. The L-shaped slide groove comprises: a first slide groove and a second slide groove connected to each other. The first slide groove is arranged along the height direction of the knife holder. The second slide groove is arranged along the length direction of the knife holder. The cutter is provided with a screw hole and a positioning hole. Each screw hole is arranged in a one-to-one correspondence with the mounting hole. The positioning holes are arranged in a one-to-one correspondence at one end of the second slide groove away from the first slide groove. The auxiliary tool comprises: a handle and a rod body connected to the handle. The rod body is inserted into the positioning hole through the second slide groove. When replacing the cutter, temporary support and positioning of the cutter are achieved, the steps of replacing the cutter are simplified, the difficulty of operation is reduced, and the safety of operation is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of printing, in particular to a paper cutter with a safe replacement cutter. Background Art

[0002] In the printing industry, in order to improve work efficiency, multiple unit patterns are printed on paper at the same time, and then cut into independent unit patterns by a paper cutter. Or in order to reserve margin, a blank area is set on the paper, and after printing, the blank area is cut off by a paper cutter. For a paper cutter, the cutter will become blunt after long-term use, and the cutter needs to be removed from the cutter holder for maintenance and polishing.

[0003] In a traditional paper cutter, the cutter is locked to the cutter holder by multiple screws. Replacing the cutter generally includes the following steps:

[0004] 1. Control the device to lower the knife to the lowest point and remove the screw on one side of the cutter (since the cutter is beveled during cutting, the screws on both sides will be blocked. When the cutter is at the highest point, the screw on one side will be exposed, and when it is at the lowest point, the screw on the other side will be exposed);

[0005] 2. Control the equipment to lift the cutter to the highest point and remove the screws on the other side of the cutter;

[0006] 3. Keep the control device still, keep the middle screw, and then remove the other screws between the two sides of the cutter;

[0007] 4. Observe the positions of the screw holes with vertical slots on the tool holder (corresponding to the two sides of the cutter or slightly closer to the middle, there are two in total), screw the auxiliary tool with a screw (similar to a screwdriver) into the cutter, and use the auxiliary tool to lock the cutter and the tool holder;

[0008] 5. Remove the screw in the middle of the cutter;

[0009] 6. Operate one auxiliary tool with one hand, hold up the auxiliary tool with your hand to keep the cutter in the current state, and gradually rotate the auxiliary tool to separate the auxiliary tool from the tool holder, and ensure that the auxiliary tool and the cutter remain connected together;

[0010] 7. Use auxiliary tools to gradually lower the cutter to separate the cutter from the knife holder.

[0011] The above-mentioned steps of replacing the cutter are cumbersome, and the operator needs to concentrate fully from the beginning of using the auxiliary tool. When separating the auxiliary tool from the tool holder, the operator must not only hold up the cutter, but also rotate the auxiliary tool. If one is not careful, it is easy to cause a safety accident where the cutter falls, resulting in the blade of the cutter breaking and personal injury (subconsciously reaching out to catch the knife). Utility Model Content

[0012] Based on this, the utility model provides a paper cutter with safe replacement of the cutter. The cutting mechanism is improved, and auxiliary tools, L-shaped slide grooves, and positioning holes are used to achieve temporary support and positioning of the cutter when replacing the cutter, thereby simplifying the steps of replacing the cutter, reducing the difficulty of operation, and improving operation safety.

[0013] A paper cutter with safe replacement of cutting blades, comprising:

[0014] frame;

[0015] A paper loading platform is installed on the frame; the paper loading platform is used to load the paper to be cut; a detachable knife pad is provided on the paper loading platform;

[0016] A paper pushing mechanism installed on the frame; the paper pushing mechanism is used to adjust the position of the paper;

[0017] A paper pressing mechanism installed on the frame; the paper pressing mechanism is used to press and fix the paper before cutting; and

[0018] A cutting mechanism mounted on a frame; the cutting mechanism is used for cutting paper; the cutting mechanism comprises: a driver mounted on the frame, a knife holder connected to the driver, a cutter detachably mounted on the knife holder by screws, and an auxiliary tool detachably connected between the knife holder and the cutter; the driver is used to drive the knife holder to tilt, thereby driving the cutter to tilt and cut in a direction perpendicular to the paper loading platform; the knife holder is provided with a mounting hole and an L-shaped slide groove on the mounting hole; the number of the mounting holes is multiple and evenly spaced along the length direction of the knife holder; the number of the L-shaped slide grooves is two and one is provided along the knife holder The two L-shaped slides are symmetrically distributed in the length direction; the two L-shaped slides are oriented in the same direction; each L-shaped slide comprises: a first slide and a second slide that are interconnected; the first slide is arranged along the height direction of the tool holder; the second slide is arranged along the length direction of the tool holder; the cutter and the pad are arranged opposite to each other; the cutter is provided with a screw hole and a positioning hole; each screw hole is arranged in a one-to-one correspondence with the mounting hole; the positioning holes are arranged in a one-to-one correspondence at one end of the second slide away from the first slide; the number of auxiliary tools is two; each auxiliary tool comprises: a handle and a rod body connected to the handle; the rod body is inserted into the positioning hole through the second slide.

[0019] In the above-mentioned paper cutter with safe replacement of the cutter, the auxiliary tool is disassembled and stored during the paper cutting operation. When the cutter needs to be replaced, the auxiliary tool is taken out and inserted into the positioning hole of the cutter. At this time, the auxiliary tool, the positioning hole, and the second slide groove of the L-shaped slide groove are used to support the cutter. Then, the position of the cutter can be adjusted by lifting and lowering, and all the screws on the cutter can be removed with the help of a screwdriver. Then, by operating the auxiliary tool, the rod body of the auxiliary tool slides out of the tool holder along the second slide groove and the first slide groove in turn, thereby driving the cutter to separate from the tool holder. The steps are simple, the operation difficulty is low, and it is safe and reliable. Through the above-mentioned design, the cutting mechanism is improved, and the auxiliary tool, the L-shaped slide groove, and the positioning hole are used to achieve temporary support and positioning of the cutter when the cutter is replaced, simplifying the steps of cutter replacement, reducing the difficulty of operation, and improving operation safety.

[0020] In one embodiment, the knife holder is further provided with a limit block; the limit block is located on the back of the cutter, and the limit block is provided with limit holes corresponding to the positioning holes; the limit holes are used for the rod to be inserted. The position of the rod is further limited by the limit holes of the limit block, so that the cutter is more stable during the process of removing the screws, and the risk of the cutter being loosened and falling is further reduced.

[0021] In one embodiment, the driver includes: a cutting motor mounted on a frame, a cam connected to the cutting motor, and a swing arm of the cam connected between the cam and the tool holder.

[0022] In one embodiment, the cutting mechanism further comprises: an electromagnetic lock connected to the knife holder; the electromagnetic lock is used to lock the knife holder at the highest point of the active stroke. The electromagnetic lock is used to lock the cutter when it stays at the highest point to prevent safety accidents caused by the cutter suddenly falling.

[0023] In one embodiment, the cutting mechanism further comprises: a laser lamp installed on the knife holder; the number of the laser lamps is multiple and when lit, a light spot is formed that overlaps with the knife pad strip. The light spot formed by the laser lamp is used for the operator to visually observe whether the knife pad strip is installed in place.

[0024] In one embodiment, the paper carrying platform is an air floating platform, which can reduce the friction coefficient of paper sliding, facilitate the movement of paper and reduce the wear on the paper.

[0025] In one embodiment, the paper pushing mechanism includes: a paper pushing paperboard slidably arranged on the paper loading platform, a slide seat connected to the paper pushing paperboard, a nut sleeve connected to the slide seat, a screw rod passed through the nut sleeve, and a paper pushing motor connected to the screw rod; the paper pushing motor drives the screw rod to rotate, and drives the slide seat to slide linearly via the nut sleeve to drive the paper pushing paperboard to slide on the paper loading platform in a direction perpendicular to the pad knife strip.

[0026] In one embodiment, the paper pressing mechanism includes: a hydraulic cylinder installed on a frame, a connecting rod connected to the hydraulic cylinder, a lifting block connected to the connecting rod, and a paper pressing board installed on the lifting block; the hydraulic cylinder drives the lifting block to move up and down through the connecting rod, thereby driving the paper pressing board to move up and down. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A three-dimensional view of a paper cutter with a safe replacement cutter according to an embodiment of the utility model;

[0028] Figure 2 for Figure 1 A three-dimensional view of the paper cutter with a safe replacement cutter from another perspective;

[0029] Figure 3 for Figure 1 A three-dimensional perspective of another perspective of the paper cutter with safe replacement of the cutter blade is shown;

[0030] Figure 4 for Figure 1 The paper cutter for safely changing the cutter blade is shown with the blade changing auxiliary tool removed;

[0031] Figure 5 for Figure 1 A combined view of a paper pressing mechanism and a cutting mechanism in a paper cutter for safely replacing a cutter is shown;

[0032] Figure 6 for Figure 5 A combined view of the paper pressing mechanism and the cutting mechanism from another perspective;

[0033] Figure 7 for Figure 5 A combined view of a cutter and a knife holder in a cutting mechanism of a paper cutter for safely replacing the cutter shown;

[0034] Figure 8 for Figure 7 The cutter and the knife holder are shown in a state of relative offset;

[0035] Fig. 9 for Figure 8 The cutter is shown separated from the cutter holder;

[0036] Fig.10 for Figure 1 A three-dimensional view of an auxiliary tool in a cutting mechanism of a paper cutter for safely replacing a cutter blade;

[0037] Fig.11 for Figure 1 The state view of the paper cutter with safe knife replacement shown in the process of knife replacement is that the knife is lowered to the lowest point;

[0038] Fig.12The state view of the paper cutter with safe knife replacement shown in 11 is when the knife is raised to the highest point during the knife changing process.

[0039] The meanings of the symbols in the accompanying drawings are:

[0040] 100-Paper cutter with safe replacement of cutter blade;

[0041] 10- rack;

[0042] 20-paper loading platform, 21-knife pad;

[0043] 30-paper pushing mechanism, 31-paper pushing board, 32-sliding seat, 33-nut sleeve, 34-screw rod, 35-paper pushing motor;

[0044] 40-paper pressing mechanism, 41-connecting rod, 42-lifting block, 43-paper pressing board, 44-counterweight block;

[0045] 50-cutting mechanism, 51-driver, 511-cutting motor, 512-cam, 513-rocker, 52-knife holder, 521-mounting hole, 522-L-shaped slide, 5221-first slide, 5222-second slide, 53-cutter, 531-screw hole, 532-positioning hole, 54-auxiliary tool, 541-handle, 542-rod body, 55-electromagnetic lock. DETAILED DESCRIPTION

[0046] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0047] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0048] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0049] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0050] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0051] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0052] like Figures 1 to 12 As shown, it is a paper cutter 100 with a safe replacement cutter according to an embodiment of the present invention.

[0053] like Figure 1 and Figure 2As shown, the paper cutter 100 with safe replacement of the cutter comprises: a frame 10, and a paper loading platform 20, a paper pushing mechanism 30, a paper pressing mechanism 40, and a cutting mechanism 50 respectively mounted on the frame 10. The frame 10 is used to provide stable support, the paper loading platform 20 is used to carry the paper to be cut, the paper pushing mechanism 30 is used to adjust the position of the paper, the paper pressing mechanism 40 is used to press and fix the paper before cutting, and the cutting mechanism 50 is used to cut the paper.

[0054] Below, combined Figures 1 to 12 , the above-mentioned paper cutter 100 with safe replacement of the cutter is further explained.

[0055] like Figures 1 to 3 As shown, in this embodiment, the frame 10 is a door-shaped structure, which is a metal steel frame structure.

[0056] like Figure 1 As shown, a detachable knife pad 21 is provided on the paper loading platform 20. Further, in order to facilitate paper pushing and reduce the wear of the paper, as Figure 1 and Figure 2 As shown, in this embodiment, the paper carrying platform 20 is an air floating platform. The air floating platform can reduce the friction coefficient of paper sliding, facilitate the movement of paper and reduce the wear on the paper.

[0057] Combination Figure 2 and Figure 3 As shown, in this embodiment, the paper pushing mechanism 30 includes: a paper pushing board 31 slidably disposed on the paper loading platform 20, a slide seat 32 connected to the paper pushing board 31, a nut sleeve 33 connected to the slide seat 32, a screw rod 34 inserted through the nut sleeve 33, and a paper pushing motor 35 connected to the screw rod 34. The paper pushing motor 35 drives the screw rod 34 to rotate, and drives the slide seat 32 to slide linearly via the nut sleeve 33 to drive the paper pushing board 31 to slide on the paper loading platform 20 in a direction perpendicular to the knife pad 21.

[0058] like Figure 6 As shown, in this embodiment, the paper pressing mechanism 40 includes: a hydraulic cylinder (not shown) installed on the frame 10, a connecting rod 41 connected to the hydraulic cylinder, a lifting block 42 connected to the connecting rod 41, and a paper pressing plate 43 installed on the lifting block 42. The hydraulic cylinder drives the lifting block 42 to move up and down through the connecting rod 41, thereby driving the paper pressing plate 43 to move up and down.

[0059] Furthermore, if Figure 6 As shown, in this embodiment, the paper pressing mechanism 40 may further include: a counterweight block 44 connected to the connecting rod 41, and the counterweight block 44 is used to reduce the load of the hydraulic cylinder.

[0060] Combination Figure 4 , Figure 5 ,as well as Figure 7As shown, in this embodiment, the cutting mechanism 50 includes: a driver 51 mounted on the frame 10, a knife holder 52 connected to the driver 51, a cutter 53 detachably mounted on the knife holder 52 by screws (not shown), and an auxiliary tool 54 detachably connected between the knife holder 52 and the cutter 53. The driver 51 is used to drive the knife holder 52 to tilt, thereby driving the cutter 53 to tilt down and cut in a direction perpendicular to the paper loading platform 20.

[0061] In order to realize the beveling action mode of the cutter 53, as Figure 5 As shown, in this embodiment, the driver 51 includes: a cutting motor 511 installed on the frame 10, a cam 512 connected to the cutting motor 511, and a swing rod 513 of the cam 512 connected between the cam 512 and the knife holder 52.

[0062] To improve the safety of the equipment, Figure 5 As shown, in this embodiment, the cutting mechanism 50 further includes: an electromagnetic lock 55 connected to the knife holder 52. The electromagnetic lock 55 is used to lock the knife holder 52 at the highest point of the active stroke. The electromagnetic lock 55 is used to lock the cutter 53 when it stays at the highest point to prevent the cutter 53 from falling suddenly and causing a safety accident.

[0063] like Fig. 9 As shown, the tool holder 52 is provided with a mounting hole 521 and an L-shaped groove 522 located on the mounting hole 521. The number of mounting holes 521 is multiple and evenly spaced along the length direction of the tool holder 52. The number of L-shaped grooves 522 is two and symmetrically distributed along the length direction of the tool holder 52. The two L-shaped grooves 522 have the same orientation. Each L-shaped groove 522 includes: a first groove 5221 and a second groove 5222 that are interconnected. The first groove 5221 is arranged along the height direction of the tool holder 52, and the second groove 5222 is arranged along the length direction of the tool holder 52. As shown in FIG. Figure 1 As shown, the cutting knife 53 is arranged opposite to the knife pad strip 21.

[0064] like Fig. 9 As shown, the cutter 53 is provided with a screw hole 531 and a positioning hole 532. Figure 7 As shown, each screw hole 531 is arranged in one-to-one correspondence with the mounting hole 521. The positioning holes 532 are arranged in one-to-one correspondence at one end of the second slide groove 5222 away from the first slide groove 5221. The number of auxiliary tools 54 is two. Fig.10 As shown, each auxiliary tool 54 includes a handle 541 and a rod 542 connected to the handle 541. The rod 542 is inserted into the positioning hole 532 through the second slide groove 5222. In this embodiment, a silicone sleeve is provided on the surface of the handle 541 to increase the friction coefficient and play an anti-slip role.

[0065] In order to improve the safety when the cutter 53 is replaced, in other embodiments, the knife holder 52 may also be provided with a limit block. The limit block is located on the back of the cutter 53, and the limit block is provided with a limit hole corresponding to the positioning hole 532. The limit hole is used for the rod body 542 to be inserted. The position of the rod body 542 is further limited by the limit hole of the limit block, so that the cutter 53 is more stable during the process of removing the screw, and the risk of the cutter 53 being loosened and falling is further reduced.

[0066] Without considering whether there is a limit block, in some embodiments, if the unlocking direction of the screw hole 531 is clockwise, the second slide groove 5222 is extended to the right relative to the first slide groove 5221; if the unlocking direction of the screw hole 531 is counterclockwise, the second slide groove 5222 is extended to the left relative to the first slide groove 5221, which can also reduce the risk of the cutter 53 loosening and falling during the process of removing the screws.

[0067] In addition, in order to facilitate the assembly and debugging of the equipment, in other embodiments, the cutting mechanism 50 may also include: a laser lamp installed on the knife holder 52. There are multiple laser lamps, and when they are turned on, they form a light spot that overlaps with the pad knife strip 21. The light spot formed by the laser lamp is used for operators to visually observe whether the pad knife strip 21 is installed in place. Furthermore, the light spot formed by the laser lamp can be a linear light spot or a light spot array.

[0068] Brief description of working principle:

[0069] like Figure 4 As shown, during the paper cutting operation, the auxiliary tool 54 is removed and stored.

[0070] like Figure 1 As shown, when the cutter 53 needs to be replaced, the auxiliary tool 54 is taken out and inserted into the positioning hole 532 of the cutter 53. At this time, the auxiliary tool 54, the positioning hole 532, and the second slide groove 5222 of the L-shaped slide groove 522 are used to support the cutter 53.

[0071] Then, the position of the cutter 53 can be adjusted by lifting and lowering, and all screws on the cutter 53 can be removed with a screwdriver. Fig.11 As shown in FIG. 1 , lower the knife holder 52 to the lowest point of the active stroke, and remove the leftmost screw on the cutter 53. Then, as shown in FIG. Fig.12 As shown, lift the knife holder 52 to the highest point of the movable stroke, and remove the remaining screws on the cutter 53.

[0072] Then, if Figure 8 and Fig. 9As shown, by operating the auxiliary tool 54, the rod 542 of the auxiliary tool 54 slides out of the tool holder 52 along the second slide groove 5222 and the first slide groove 5221 in sequence (in Figure 8 For example, driven by the auxiliary tool 54, the cutter 53 is first translated to the left in the direction of the arrow in the figure, so that the rod body 542 enters the top of the first slide groove 5221, that is, the intersection of the second slide groove 5222 and the first slide groove 5221, and then slides down the first slide groove 5221 to complete the unloading of the knife), thereby driving the cutter 53 to separate from the knife holder 52. The steps are simple, the operation difficulty is low, and it is safe and reliable.

[0073] The above-mentioned paper cutter 100 with safe replacement of the cutter is improved on the cutting mechanism 50. The auxiliary tool 54, the L-shaped slide groove 522, and the positioning hole 532 are used to temporarily support and position the cutter 53 when replacing the cutter 53, thereby simplifying the steps of replacing the cutter 53, reducing the difficulty of operation, and improving the safety of operation.

[0074] The technical features of the above embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0075] The above embodiments only express the preferred implementation of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A paper cutter with safe replacement of cutter blades, characterized in that: include: frame; A paper carrying platform installed on the frame; the paper carrying platform is used to carry the paper to be cut; The paper carrying platform is provided with a detachable knife pad; A paper pushing mechanism installed on the frame; the paper pushing mechanism is used to adjust the position of the paper; A paper pressing mechanism installed on the frame; the paper pressing mechanism is used to press and fix the paper before cutting; as well as A cutting mechanism mounted on the frame; The cutting mechanism is used for cutting paper; the cutting mechanism comprises: a driver mounted on the frame, a knife holder connected to the driver, a cutter detachably mounted on the knife holder by screws, and an auxiliary tool detachably connected between the knife holder and the cutter; the driver is used to drive the knife holder to tilt, thereby driving the cutter to tilt and cut in a direction perpendicular to the paper loading platform; the knife holder is provided with a mounting hole and an L-shaped slide groove on the mounting hole; the number of the mounting holes is multiple and evenly spaced along the length direction of the knife holder; the number of the L-shaped slide grooves is two and symmetrically distributed along the length direction of the knife holder ; The two L-shaped slide grooves are oriented in the same direction; each of the L-shaped slide grooves comprises: a first slide groove and a second slide groove which are interconnected; the first slide groove is arranged along the height direction of the tool holder; the second slide groove is arranged along the length direction of the tool holder; the cutter and the pad knife strip are arranged opposite to each other; the cutter is provided with a screw hole and a positioning hole; each of the screw holes is arranged in a one-to-one correspondence with the mounting hole; the positioning holes are arranged in a one-to-one correspondence at one end of the second slide groove away from the first slide groove; the number of the auxiliary tools is two; each of the auxiliary tools comprises: a handle and a rod body connected to the handle; the rod body is inserted into the positioning hole through the second slide groove.

2. The paper cutter with safe blade replacement according to claim 1, characterized in that: The knife holder is also provided with a limit block; the limit block is located on the back of the cutter, and the limit block is provided with limit holes corresponding to the positioning holes one by one; the limit holes are used for the rod body to be inserted.

3. The paper cutter with safe blade replacement according to claim 1, characterized in that: The driver comprises: a cutting motor installed on the frame, a cam connected to the cutting motor, and a swing arm of the cam connected between the cam and the tool holder.

4. The paper cutter with safe blade replacement according to claim 1, characterized in that: The cutting mechanism further comprises: an electromagnetic lock connected to the knife holder; the electromagnetic lock is used to lock the knife holder at the highest point of the movable stroke.

5. The paper cutter with safe blade replacement according to claim 1, characterized in that: The cutting mechanism also includes: a laser lamp installed on the knife holder; the laser lamp is in multiple numbers and forms a light spot that overlaps with the knife pad when it is lit.

6. The paper cutter with safe blade replacement according to claim 1, characterized in that: The paper carrying platform is an air floating platform.

7. The paper cutter with safe blade replacement according to claim 1, characterized in that: The paper pushing mechanism includes: a paper pushing board slidably arranged on the paper loading platform, a slide seat connected to the paper pushing board, a nut sleeve connected to the slide seat, a screw rod passed through the nut sleeve, and a paper pushing motor connected to the screw rod; the paper pushing motor drives the screw rod to rotate, and drives the slide seat to slide linearly via the nut sleeve to drive the paper pushing board to slide on the paper loading platform in a direction perpendicular to the knife pad.

8. The paper cutter with safe blade replacement according to claim 1, characterized in that: The paper pressing mechanism includes: a hydraulic cylinder installed on the frame, a connecting rod connected to the hydraulic cylinder, a lifting block connected to the connecting rod, and a paper pressing board installed on the lifting block; the hydraulic cylinder drives the lifting block to move up and down through the connecting rod, thereby driving the paper pressing board to move up and down.

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