CN215360409U - Last separating mechanism of printing device - Google Patents

Abstract

The application relates to a separating mechanism on a printing device, comprising: the cutting device comprises a rack, two driving roller groups, a supporting plate, a separating plate and a cutter, wherein the two driving roller groups are arranged on the rack and comprise two driving rollers which are horizontally and rotatably arranged on the rack; the support plate is horizontally arranged on the rack, is positioned between the two driving roller groups, and the upper surface of the support plate is used for supporting the printing substrate; the separating plate is horizontally arranged on the frame and is positioned between the two driving rollers, and a gap for the bottom paper layer to pass through is formed between the separating plate and the upper surface of the supporting plate; the cutter is vertically arranged on the rack in a sliding manner, is positioned above the separating plate and is used for cutting the processing layer into easily torn lines; still be provided with the driving piece in the frame, the driving piece is used for driving the vertical slip of cutter. This application has the effect that can process more even easy tear line on the working layer.

Description

Last separating mechanism of printing device

Technical Field

The application relates to the field of printing technology, in particular to a separating mechanism on a printing device.

Background

Printing is a technology of making a plate, applying ink, pressurizing and the like on an original such as characters, pictures, photos, anti-counterfeiting and the like, so that the ink is transferred to the surface of materials such as paper, textiles, plastic products, leather, PV, PC and the like, and the content of the original is copied in batches, wherein a printing substrate is used in the printing process, specifically, the printing substrate comprises a processing layer and a bottom paper layer which are adhered together, when a required product is printed, the processing layer is separated from the bottom paper layer, an easy-to-tear line is cut on the processing layer, and then the processing layer is sent to a subsequent processing area to manufacture the required product.

In the related art, the separating mechanism on the printing device comprises a rack, two groups of driving roller sets, a separating rod and a cutter, wherein the two groups of driving roller sets are arranged on the rack at intervals; the rack is also horizontally provided with a supporting plate, and the upper surface of the supporting plate is used for supporting the printing substrate; the separating rods are arranged on the rack, a gap for the bottom paper layer to pass through is formed between the separating rods and the upper surface of the supporting plate, one end of each separating rod is in a conical shape for separating the processing layer from the bottom paper layer, and a plurality of separating rods are arranged at intervals; the cutter slides and sets up in the frame to the slip direction of cutter is vertical direction, and the cutter sets up adjacent with the one end that the release lever self is the toper shape moreover.

When will make required product, make two drive roller of drive roller group rotate, so that printing substrate carries forward gradually, when printing substrate passes through separation bar department after that, the working layer just is separated with the ground paper layer, wherein the working layer can move to the one side that the backup pad is kept away from to the separation bar, the ground paper layer then can move to the one side that the separation bar is close to the backup pad, then make the cutter move down, so that the cutter cutting working layer is located the part of separation bar toper shape department, thereby make to be formed with easily tearing line on the working layer, last working layer just can be sent into on next step's manufacturing procedure by drive roller group, in order can make required product.

To the correlation technique among the above-mentioned, the inventor thinks that there is when the cutter cuts the machined layer, because of there is certain interval between a plurality of separation poles, so make the part of machined layer position between a plurality of separation poles be difficult for cutting out easily tear the line easily to make the easily tear line on the machined layer set up inhomogeneous defect.

SUMMERY OF THE UTILITY MODEL

In order to enable the easy-tearing lines on the processing layer to be uniformly arranged, the application provides a separating mechanism on a printing device.

The application provides a last separating mechanism of printing device adopts following technical scheme:

a separation mechanism on a printing device, comprising: the cutting device comprises a rack, two driving roller groups, a supporting plate, a separating plate and a cutter, wherein the two driving roller groups are arranged on the rack and also comprise two driving rollers which are horizontally and rotatably arranged on the rack; the supporting plate is horizontally arranged on the rack, is positioned between the two driving roller groups, and the upper surface of the supporting plate is used for supporting a printing substrate; the separating plate is horizontally arranged on the rack and is positioned between the two driving rollers, and a gap for the bottom paper layer to pass through is formed between the separating plate and the upper surface of the supporting plate; the cutter is vertically arranged on the rack in a sliding manner, is positioned above the separating plate and is used for cutting the processing layer into easily torn lines; still be provided with the driving piece in the frame, the driving piece is used for driving the vertical slip of cutter.

By adopting the technical scheme, when the printing substrate is processed, the driving roller group is enabled to gradually convey the printing substrate forward, when the printing substrate is transported to the separation plate, the processing layer and the bottom paper layer are separated, the processing layer moves to the upper side of the separation plate, the bottom paper layer moves to the gap between the lower side of the separation plate and the support plate, then the driving part is started, the driving part enables the cutter to slide downwards, the cutter is matched with the upper surface of the separation plate to cut out an easy-to-tear line on the processing layer, then the processed processing layer is gradually sent to the next procedure by the driving roller group to manufacture a required product, compared with the mode of arranging a plurality of separation rods, in the design mode, when the cutter cuts out the easy-to-tear line, the separation plate can support different positions of the processing layer along the cutting direction of the cutter, so that the processing layer can be more uniformly contacted with the cutter, thereby the easy-to-tear lines on the processing layer can be uniformly arranged.

Preferably, one of the two driving roller groups is set as an input group, and the other is set as an output group, wherein the distance between the two driving rollers in the input group is used for the printing substrate to penetrate through, and the distance between the two driving rollers in the output group is used for the processing layer to penetrate through; the vertical distance between the input group and the support plate is smaller than the vertical distance between the output group and the support plate.

Through adopting above-mentioned technical scheme, after because of the machined layer separates with the bottom paper layer, still have certain viscidity on the bottom paper layer, and when the cutter cut out easily tearing the line on the machined layer, the machined layer also can receive decurrent power, so distance between output group and the backup pad is for the input group and the backup pad between the distance will be a little big setting mode, then the machined layer can upwards be transported after being processed out easily tearing the line, thereby make the machined layer be difficult for again with the adhesion of bottom paper layer, and then be difficult for interfering the follow-up reprocessing to the machined layer.

Preferably, one end of the separation plate close to the output group is provided with an extension plate, one end of the extension plate far away from the support plate extends to one side of the output group close to the separation plate, and the distance between one end of the extension plate close to the separation plate and the upper surface of the support plate is smaller than the distance between one end of the extension plate far away from the separation plate and the upper surface of the support plate.

Through adopting above-mentioned technical scheme, because of the setting of extension board, then the working layer is being processed out after easily tearing the line, can receive the support of extension board at the in-process that removes to output group, on the one hand, the part that the working layer lies in between separation plate and the output group is difficult for taking place to collapse by a wide margin, thereby make the working layer be difficult for adhesion on the base stock layer again more, on the other hand, the extension board can play certain guide effect to the working layer, make the working layer move up gradually when moving on the extension board, thereby make output group can send the working layer into on next step's process more smoothly.

Preferably, the distance between one end of the extension plate close to the output group and the upper surface of the support plate is smaller than the distance between the two driving rollers of the output group and the upper surface of the support plate.

Through adopting above-mentioned technical scheme, when the processing layer breaks away from and gets into the interval between two drive rollers in the output group from the one end that the separation plate was kept away from to the extension board, the processing layer is difficult for taking place bending by a wide margin between the part that the processing layer is in the output group and the part that is in on the extension board, then the processing layer removes to the extension board and is difficult for appearing too taut condition when keeping away from separation plate one end to make the processing layer be difficult for appearing cracked condition on the position at easy tear line place.

Preferably, the supporting plate is provided with two limiting parts at positions below the separating plate, and the two limiting parts can respectively separate and block two ends of the base paper layer perpendicular to the conveying direction of the base paper layer.

Through adopting above-mentioned technical scheme, after bottom paper layer and working layer separation, bottom paper layer just can move to in the clearance between separator below and the backup pad, because of the setting of locating part this moment for bottom paper layer's direction of delivery is difficult for taking place the skew, thereby is difficult for influencing bottom paper layer not with the part of working layer separation, and then makes the working layer can carry forward more smoothly.

Preferably, the limiting part comprises a connecting rod, a connecting cap and a connecting ring, the connecting rod is arranged on the supporting plate in a penetrating mode, and an external thread is arranged on the connecting rod; the connecting cap is arranged at one end of the connecting rod, and the connecting cap and the lower surface of the supporting plate form a barrier; the connecting ring is sleeved on one end of the connecting rod, which is far away from the connecting cap, and is in threaded connection with the connecting rod; the support plate is provided with a sliding hole for the connecting rod to slide and penetrate through, and the extending direction of the sliding hole is perpendicular to the conveying direction of the bottom paper layer.

Through adopting above-mentioned technical scheme, when will fixing the locating part in the backup pad, wear to establish in the slide opening with the connecting rod earlier, then keep away from the connecting cap with go-between threaded connection on one end at the connecting rod, and screw up the go-between, then just make the go-between support tightly on the upper surface of backup pad, thereby just make the locating part fix in the backup pad, two go-between this moment just can produce to the both ends of bottom paper layer perpendicular to self direction of delivery and separate the fender, the setting of slide opening in addition, still can make the locating part can set up along the different positions of slide opening extending direction, thereby make the not unidimensional bottom paper layer of locating part adaptation.

Preferably, the rack comprises two mounting plates for mounting the driving roller group, the two mounting plates are parallel to each other and are arranged at intervals, and a mounting hole is formed in one side surface of each mounting plate; one of the two driving rollers is a fixed roller, the other driving roller is a sliding roller, and two ends of the fixed roller are rotatably connected to the two mounting plates through bearings; the two ends of the sliding rolling shaft are sleeved with sliding blocks, the sliding rolling shaft is rotatably connected with the sliding blocks through bearings, and the sliding blocks are arranged in the mounting holes in a sliding mode; and the mounting plate is provided with an adjusting piece for adjusting the distance between the fixed rolling shaft and the sliding rolling shaft.

By adopting the technical scheme, the slider can slide up and down along the inner wall of the mounting hole through the adjusting piece, so that the distance between the sliding roller and the fixed roller can be changed, on one hand, the sliding roller and the fixed roller can be matched with printing base materials with different thicknesses, on the other hand, the distance between the sliding roller and the fixed roller can be changed, and the sliding roller and the fixed roller can have enough friction force to convey the printing base materials.

Preferably, the adjusting part comprises an adjusting rod, one end of the adjusting rod is arranged on the side wall of the upper end of the mounting hole in a penetrating mode and is in threaded connection with the side wall of the mounting hole, the other end of the adjusting rod is arranged on the sliding block in a penetrating mode and is connected with the sliding block in a rotating mode through a bearing.

Through adopting above-mentioned technical scheme, when will adjusting the interval between slip roller bearing and the fixed roller bearing, rotatable adjusting lever, then the length that the adjusting lever is in the mounting hole can change, thereby make the position that the slider is in the mounting hole change, and then just reach the purpose that makes the interval between slip roller bearing and the fixed roller bearing, compare in the mode of pulling the adjusting lever from top to bottom, this kind of design, on the one hand, the adjusting lever passes through threaded connection's mode, can adjust the interval between slip roller bearing and the fixed roller bearing more accurately, on the other hand, threaded connection's mode alright make the adjusting lever fix on the mounting panel, thereby needn't add locking components and parts, in order to pin the position at the adjusting lever place after the adjustment finishes, thereby be convenient for make the adjusting lever more.

In summary, the present application includes at least one of the following beneficial technical effects:

1. through the arrangement of the rack, the driving roller group, the supporting plate, the separating plate and the cutter, when the cutter cuts out the easy-to-tear line, the separating plate can support different positions of the processing layer along the cutting direction of the cutter, so that the processing layer can be more uniformly contacted with the cutter, and the easy-to-tear line on the processing layer can be uniformly arranged;

2. through the arrangement mode that the distance between the output group and the support plate is larger than that between the input group and the support plate, the processing layer can be conveyed upwards after the easy-to-tear line is processed, so that the processing layer is not easy to adhere to the bottom paper layer again, and further the subsequent reprocessing of the processing layer is not easy to interfere;

3. through the setting of extension board, then the part that the processing layer is located between separator and the output group is difficult for taking place to collapse by a wide margin to make the processing layer be difficult for adhesion again on the ground paper layer more.

Drawings

Fig. 1 is a schematic structural view of a separating mechanism on a printing apparatus in an embodiment of the present application.

Fig. 2 is an enlarged view at a in fig. 1.

Description of reference numerals: 1. a frame; 11. mounting a plate; 12. mounting holes; 13. a slider; 2. a drive roller group; 21. a drive roller; 211. fixing the roller; 212. a sliding roller; 22. inputting a group; 23. outputting the group; 3. a support plate; 31. a slide hole; 4. a separation plate; 41. an extension plate; 5. a cutter; 51. a drive member; 6. printing a substrate; 61. processing the layer; 62. a base paper layer; 7. a limiting member; 71. a connecting rod; 72. a connecting cap; 73. a connecting ring; 8. an adjustment member; 81. an adjusting rod.

Detailed Description

The present application is described in further detail below with reference to figures 1-2.

The embodiment of the application discloses last separating mechanism of printing device. Referring to fig. 1, the separating mechanism includes two driving roller sets 2 disposed on the frame 1, in this embodiment, two driving roller sets 2 are disposed, and each driving roller set 2 further includes two driving rollers 21, specifically, the two driving rollers 21 are disposed in parallel and at an interval, and the driving rollers 21 are further horizontally rotatably connected to the frame 1, and a gap between the two driving rollers 21 is provided for the printing substrate 6 to pass through, so that when the two driving rollers 21 rotate, the printing substrate 6 can be gradually conveyed forward.

Referring to fig. 1, a support plate 3 is further horizontally fixed on the frame 1, and the support plate 3 is located between two driving roller sets 2, in this embodiment, one of the two driving roller sets 2 is an input set 22, and the other is an output set 23, where a distance between the input set 22 and an upper surface of the support plate 3 is smaller than a distance between the output set 23 and an upper surface of the support plate 3, and in this embodiment, the printing substrate 6 further includes a processing layer 61 and a base paper layer 62, so that when the driving roller set 2 is used, the printing substrate 6 is inserted between the two driving rollers 21 in the input set 22, the processing layer 61 is inserted between the two driving rollers 21 in the output set 23, and the processing layer 61 and the base paper layer 62 are separated at a position between the two driving roller sets 2, so that a certain processing treatment can be performed on the processing layer 61 when the separation is performed.

Referring to fig. 1, a separating plate 4 is horizontally fixed on the frame 1, the separating plate 4 is disposed above the supporting plate 3 and located between the input group 22 and the output group 23, and a gap for passing the base paper layer 62 exists between the separating plate 4 and the upper surface of the supporting plate 3, in this embodiment, a driving member 51 is further fixed on the frame 1, the driving member 51 is a hydraulic cylinder, wherein the driving member 51 is located above the separating plate 4, and a cutting knife 5 is fixed on a piston rod of the driving member 51, so that when the layer 61 is to be processed, the input group 22 moves the printing substrate 6 toward the output group 23, when the substrate 6 to be printed moves to an end of the separating plate 4 close to the input group 22, the processing layer 61 is separated from the base paper layer 62, wherein the processing layer 61 moves above the separating plate 4, the base paper layer 62 moves into the gap between the separating plate 4 and the supporting plate 3, then, the driving member 51 is started to make the cutter 5 slide downwards, so that the cutter 5 is matched with the upper surface of the separating plate 4 to cut the easy-to-tear line on the processing layer 61, and then the output group 23 sends the processed processing layer 61 to the next process, so that the remaining processes of producing the required product can be performed.

Referring to fig. 1, in this embodiment, after separation plate 4 separates machined layer 61 and ground paper layer 62, cutter 5 can support machined layer 61 tightly on the upper surface of separation plate 4, in order to cut out the easy tear line on machined layer 61, at this in-process, separation plate 4 can play the supporting role to machined layer 61 along the different positions of cutting direction, thereby make the different positions homoenergetic of machined layer 61 and cutter 5 contact, then the difficult condition that the easy tear line that appears is interrupted the setting on the different positions of machined layer 61 along cutting direction, and then make the easy tear line on machined layer 61 can set up ground more evenly.

Referring to fig. 1, an extension plate 41 is integrally fixed to an end of the separation plate 4 remote from the input group 22, and the extending plate 41 is disposed obliquely, specifically, one end of the extending plate 41 is fixedly connected to one end of the separating plate 4 close to the output group 23, and the other end extends to one side of the input group 22 close to the separating plate 4, wherein the distance between the end of the extension plate 41 close to the separation plate 4 and the upper surface of the support plate 3 is smaller than the distance between the end of the extension plate 41 close to the output group 23 and the upper surface of the support plate 3, so that the extension plate 41 is in an upward inclined state, so as to support the part of the processing layer 61 between the separating plate 4 and the output group 23, when the cutter 5 cuts the easy-to-tear line on the processing layer 61, the part of the processing layer 61 between the separating plate 4 and the output group 23 is not easy to drop greatly, so that the processing layer 61 is not easy to adhere to the base paper layer 62 again.

Referring to fig. 1, in this embodiment, the distance between the end of the extension plate 41 close to the output group 23 and the upper surface of the support plate 3 is smaller than the distance between the two driving rollers 21 in the output group 23 and the upper surface of the support plate 3, so that after the processing layer 61 is separated from the end of the extension plate 41 far from the separating plate 4, the processing layer is not easily bent downward to penetrate into the two driving rollers 21 in the output group 23, and thus the processing layer 61 is not easily tensioned when passing through the end of the extension plate 41 far from the separating plate 4, and further the processing layer 61 is not easily torn at the position of the easy-to-tear line.

Referring to fig. 1 and 2, a sliding hole 31 is formed in the upper surface of the support plate 3, the sliding hole 31 is located below the separation plate 4, and the arrangement direction of the sliding hole 31 is perpendicular to the conveying direction of the base paper layer 62, wherein the sliding hole 31 is further slidably arranged on two limiting members 7, the two limiting members 7 respectively block two ends of the base paper layer 62 perpendicular to the conveying direction of the base paper layer, specifically, each limiting member 7 comprises a connecting rod 71, a connecting cap 72 and a connecting ring 73, the connecting rod 71 is arranged on the sliding hole 31 in a penetrating manner, and the connecting rod 71 is further provided with an external thread; the connecting cap 72 is integrally fixed to one end of the connecting rod 71, and the connecting cap 72 forms a barrier to the lower surface of the support plate 3. in this embodiment, the connecting rod 71 and the connecting cap 72 are one of the components of a bolt, and the bolt can be selected for use in actual use.

Referring to fig. 1 and 2, the connecting ring 73 is sleeved on one end of the connecting rod 71, which is far away from the connecting cap 72, the connecting ring 73 is in threaded connection with the connecting rod 71, and the connecting ring 73 is located above the supporting plate 3, when the limiting member 7 is to be locked on the supporting plate 3, the connecting ring 73 can be screwed, so that the connecting cap 72 abuts against the lower surface of the supporting plate 3, and the connecting ring 73 abuts against the upper surface of the supporting plate 3, at this time, the limiting member 7 is locked on the supporting plate 3, so that two ends of the base paper layer 62, which are perpendicular to the conveying direction, can be respectively blocked, after the base paper layer 62 is separated from the processing layer 61, the conveying direction of the base paper layer 62 is not prone to be skewed, so that the base paper layer 62 which is not separated from the processing layer 61 is not prone to be interfered, and the processing layer 61 can be conveyed forward more smoothly.

In addition, in the embodiment, when the size of the printing substrate 6 changes, the position-limiting members 7 can be fixed at different positions in the length direction of the sliding hole 31, so that the distance between the two position-limiting members 7 can be changed, and the position-limiting members 7 can be adapted to the printing substrates 6 with different sizes.

Referring to fig. 1, the frame 1 further includes two mounting plates 11 for mounting the driving roller set 2, the two mounting plates 11 are parallel to each other and are spaced apart from each other, one side surface of the two mounting plates 11 close to each other is respectively provided with a mounting hole 12, the cross section of the mounting hole 12 is rectangular, and the length direction of the cross section of the mounting hole 12 is vertical, in this embodiment, one of the two driving rollers 21 in the driving roller set 2 is a fixed roller 211, the other is a sliding roller 212, specifically, two ends of the fixed roller 211 are rotatably connected to the two mounting plates 11 through bearings, two ends of the sliding roller 212 are respectively sleeved with a slider 13, the sliding roller 212 is rotatably connected to the slider 13 through bearings, and the slider 13 is further slidably connected to the mounting hole 12, wherein the sliding direction of the slider 13 is further parallel to the length direction of the cross section of the mounting hole 12, so that the interval between the sliding roller 212 and the fixed roller 211 can be changed.

Referring to fig. 1, in the present embodiment, an adjusting member 8 is disposed on the mounting plate 11, specifically, the adjusting member 8 includes an adjusting rod 81, an upper end of the adjusting rod 81 is inserted into a side wall at an upper end of the mounting hole 12 and is in threaded connection with a side wall of the mounting hole 12, a lower end of the adjusting rod 81 is inserted into the slider 13 and is rotatably connected to the slider 13 through a bearing, wherein a circumferential side surface of the slider 13 is also abutted to a vertical inner wall of the mounting hole 12, when the adjusting rod 81 is rotated, a length of a portion of the adjusting rod 81 located in the mounting hole 12 is changed, so that the slider 13 can slide upward or downward, and a purpose of adjusting a distance between the sliding roller 212 and the fixed roller 211 is achieved, and when the distance between the sliding roller 212 and the fixed roller 211 is adjusted, the adjusting rod 81 is stopped rotating.

The implementation principle of the separating mechanism on the printing device in the embodiment of the application is as follows: when the printed substrate 6 is to be processed, the input group 22 is made to convey the printed substrate 6 to a direction close to the output group 23, when the printed substrate 6 moves to the end of the separation plate 4 close to the input group 22, the processing layer 61 is separated from the base paper layer 62, wherein the processing layer 61 moves to the upper side of the separation plate 4, the base paper layer 62 moves to the gap between the lower side of the separation plate 4 and the support plate 3, then the driving member 51 is started, so that the cutter 5 slides downwards, the processing layer 61 is abutted against the upper surface of the separation plate 4 by the cutter 5, the easy-to-tear line is cut on the processing layer 61, and then the processing layer 61 is sent to the next processing procedure by the output group 23 to manufacture a required product.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (8)

1. A separating mechanism on a printing device, comprising: the cutting device comprises a rack (1), two driving roller groups (2), a supporting plate (3), a separating plate (4) and a cutter (5), wherein the driving roller groups (2) are arranged on the rack (1), the number of the driving roller groups (2) is two, and the driving roller groups (2) also comprise two driving rollers (21) which are horizontally and rotatably arranged on the rack (1); the supporting plate (3) is horizontally arranged on the rack (1), the supporting plate (3) is positioned between the two driving roller groups (2), and the upper surface of the supporting plate (3) is used for supporting a printing substrate (6); the separating plate (4) is horizontally arranged on the frame (1) and is positioned between the two driving rollers (21), and a gap for the bottom paper layer (62) to pass through is formed between the separating plate (4) and the upper surface of the supporting plate (3); the cutter (5) is vertically arranged on the rack (1) in a sliding mode, the cutter (5) is located above the separating plate (4), and the cutter (5) is used for enabling the processing layer (61) to cut an easy-to-tear line; the cutting knife is characterized in that a driving piece (51) is further arranged on the rack (1), and the driving piece (51) is used for driving the cutting knife (5) to vertically slide.

2. A separating mechanism on a printing apparatus according to claim 1, wherein: one of the two driving roller groups (2) is set as an input group (22), and the other is set as an output group (23), wherein the distance between the two driving rollers (21) in the input group (22) is used for the printing base material (6) to penetrate through, and the distance between the two driving rollers (21) in the output group (23) is used for the processing layer (61) to penetrate through; the vertical distance between the input group (22) and the support plate (3) is smaller than the vertical distance between the output group (23) and the support plate (3).

3. A separating mechanism on a printing apparatus according to claim 2, wherein: one of the end of the separation plate (4) close to the output group (23) is provided with an extension plate (41), one end of the extension plate (41) far away from the support plate (3) extends to one side of the output group (23) close to the separation plate (4), and the distance between one end of the extension plate (41) close to the separation plate (4) and the upper surface of the support plate (3) is smaller than the distance between one end of the extension plate (41) far away from the separation plate (4) and the upper surface of the support plate (3).

4. A separating mechanism on a printing apparatus according to claim 3, wherein: the distance between one end, close to the output group (23), of the extension plate (41) and the upper surface of the support plate (3) is smaller than the distance between the two driving rollers (21) of the output group (23) and the upper surface of the support plate (3).

5. A separating mechanism on a printing apparatus according to claim 1, wherein: the supporting plate (3) is provided with two limiting parts (7) at the position below the separating plate (4), and the two limiting parts (7) can respectively separate and block two ends of the bottom paper layer (62) perpendicular to the conveying direction of the bottom paper layer.

6. The separating mechanism of a printing apparatus according to claim 5, wherein: the limiting piece (7) comprises a connecting rod (71), a connecting cap (72) and a connecting ring (73), the connecting rod (71) is arranged on the supporting plate (3) in a penetrating mode, and an external thread is arranged on the connecting rod (71); the connecting cap (72) is arranged at one end of the connecting rod (71), and the connecting cap (72) and the lower surface of the supporting plate (3) form a barrier; the connecting ring (73) is sleeved on one end of the connecting rod (71) far away from the connecting cap (72) and is in threaded connection with the connecting rod (71); the support plate (3) is provided with a sliding hole (31) for the connecting rod (71) to slide and penetrate, and the extending direction of the sliding hole (31) is perpendicular to the conveying direction of the bottom paper layer (62).

7. A separating mechanism on a printing apparatus according to claim 1, wherein: the rack (1) comprises mounting plates (11) for mounting the driving roller group (2), the two mounting plates (11) are parallel to each other and are arranged at intervals, and a mounting hole (12) is formed in one side surface of each mounting plate (11); one of the two driving rollers (21) is a fixed roller (211), the other one is a sliding roller (212), and two ends of the fixed roller (211) are rotatably connected to the two mounting plates (11) through bearings; the two ends of the sliding rolling shaft (212) are sleeved with sliding blocks (13), the sliding rolling shaft (212) is rotatably connected with the sliding blocks (13) through bearings, and the sliding blocks (13) are arranged in the mounting holes (12) in a sliding mode; the mounting plate (11) is provided with an adjusting piece (8) used for adjusting the distance between the fixed rolling shaft (211) and the sliding rolling shaft (212).

8. The separating mechanism of claim 7, wherein: the adjusting piece (8) comprises an adjusting rod (81), one end of the adjusting rod (81) is arranged on the side wall of the upper end of the mounting hole (12) in a penetrating mode, and is in threaded connection with the side wall of the mounting hole (12), the other end of the adjusting rod is arranged on the sliding block (13) in a penetrating mode, and the adjusting piece is connected with the sliding block (13) in a rotating mode through a bearing.

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