CN221187812U - Automatic double-sided printing device - Google Patents

Abstract

The utility model belongs to the technical field of printing, in particular to an automatic double-sided printing device which comprises a printing machine frame body, wherein a sliding rail is fixedly arranged at the top of one end of the printing machine frame body, and a sliding block is inserted at the top of the sliding rail in a sliding manner. According to the automatic double-sided printing device, the printing turnover mechanism is arranged for turnover of the printing label, so that the front side and the back side of the printing label can be treated in the printing process, and the printing efficiency and the product quality can be improved; the conveying guide adjusting mechanism is used for controlling the position and the direction of the printed labels in the conveying process. The printing label moving device can ensure that the printing label moves accurately and keeps stable trend, can also avoid the problems of offset, dislocation and the like of the printing label, and improves the printing accuracy and consistency; the tension adjusting mechanism is used for controlling the tension of the printed label in the printing process. It is ensured that the printed label maintains proper tension throughout the printing process, thereby improving print quality and stability.

Description

Automatic double-sided printing device

Technical Field

The utility model relates to the technical field of printing, in particular to an automatic double-sided printing device.

Background

In the prior art, when double-sided printing is needed, after the first side is printed, the printed label is rewound and turned once again, and then the printed label is put back into a printer to print on the second side. The method is simple and easy to operate, but has low efficiency, and can cause damage and influence on printing quality due to repeated manual overturning, wherein the manual overturning is adjusted, and the accurate alignment of the two sides is required to be ensured, so that the accuracy is reduced, and an automatic double-sided printing device is required.

Disclosure of utility model

Based on the prior art, the utility model provides an automatic double-sided printing device.

The utility model provides an automatic double-sided printing device which comprises a printing machine equipment frame body, wherein a sliding rail is fixedly arranged at the top of one end of the printing machine equipment frame body, a sliding block is inserted at the top of the sliding rail in a sliding manner, and supporting rods are distributed in a linear array on the inner bottom wall of the other end of the printing machine equipment frame body.

A vertical standing plate is fixedly arranged on one side surface of the sliding rail, and a printing turnover mechanism, a conveying guide adjusting mechanism and a tension adjusting mechanism are respectively arranged on one side of the vertical standing plate.

The printing turnover mechanism realizes the action of automatically turnover and converting the other side to convey printing after one side is printed by the printed label.

The conveying guide adjusting mechanism realizes the action of guiding conveying adjustment in the process of controlling the printing label to turn over by the printing turning mechanism.

The tension adjusting mechanism realizes the action of tension adjustment when the printing turnover mechanism drives the printing label to convert the printing surface.

Preferably, the printing turnover mechanism comprises a horizontal conveying turnover roller and a vertical conveying turnover roller, wherein a horizontal rotating shaft is connected to the top end surface and the bottom end surface of one side of the vertical standing plate through bearings in a rotating mode, one ends of the four horizontal rotating shafts are connected with vertical connecting plates through bearings in a rotating mode, and the arc surface of the horizontal rotating shaft is fixedly mounted on the surface of the horizontal conveying turnover roller.

Preferably, the connecting seat is fixedly installed on the top end surface and the bottom end surface of one side of the vertical connecting plate, two opposite surface two ends of the connecting seat are respectively connected with the vertical rotating shaft through bearings in a rotating mode, the arc surface of the vertical rotating shaft is fixedly installed on the surface of the vertical conveying overturning roller, two surfaces of the vertical conveying overturning roller and four surfaces of the horizontal conveying overturning roller are respectively connected with the surface of a printing label in a sliding mode, the connecting seat bottom surface installed at the bottom end of the vertical connecting plate is connected with the connecting pipe through bearings in a rotating mode, and the inner wall of the connecting pipe is in threaded connection with the top end of the supporting rod.

Preferably, the conveying guide adjusting mechanism is provided with two groups, and is respectively located at two sides of the printing turnover mechanism, the conveying guide adjusting mechanism comprises an inclined conveying turnover roller, a fixed pin shaft is fixedly installed at one end top of the vertical standing plate and one end bottom of the vertical connecting plate, and an adjusting groove is formed in the other end bottom of the vertical standing plate and the other end top of the vertical connecting plate.

Preferably, the circular arc surface of fixed pin axle is connected with right regulating block through the bearing rotation, the one end fixed mounting of right regulating block has right-hand screw rod, the surface threaded connection of right-hand screw rod has right-hand nut, the interior bottom wall fixed mounting of regulating tank has spacing seat, spacing seat's surface with the interior roof of regulating tank all is connected with the regulation pivot through the bearing rotation, the bottom fixed mounting of regulation pivot has the knob, the circular arc surface threaded connection of regulation pivot has the sliding seat, the surface of sliding seat with the inner wall slip grafting of regulating tank, the surface fixed mounting of sliding seat has connecting pin axle, the circular arc surface of connecting pin axle is connected with left regulating block through the bearing rotation, one side surface fixed mounting of left-hand screw rod has the left-hand screw rod, the surface threaded connection of left-hand screw rod has the left-hand nut, the one end of left-hand screw rod with the equal threaded connection of right-hand screw rod has the fine setting pipe, the fine setting pipe the inner wall of slope transport upset roller passes through the bearing rotation to be connected, two the circular arc surface of upset roller has sliding surface and the roll of upset roller, two the surface of upset roller is the roll and the roll surface of label is the roll surface of label winding is the roll and the roll is the roll surface of label and the label winding of label.

Preferably, the tension adjusting mechanism comprises tension rollers, tension driving seats are fixedly installed on the left side surface of the vertical standing plate and the left side surface of the vertical connecting plate, tension driving grooves are formed in the surfaces of the two tension driving seats, a threaded rod is connected with the right inner wall of each tension driving groove in a threaded mode, and a right clamping block is fixedly installed at one end of each threaded rod.

Preferably, a reset tube is fixedly arranged on one side surface of the tension driving seat, the inner wall of the reset tube is fixedly communicated with the inner wall of the tension driving groove, a reset spring is fixedly arranged on the inner wall of the left end of one end of the reset tube, a reset sliding shaft is fixedly arranged at one end of the reset spring, the arc surface of one end of the reset sliding shaft is in sliding connection with the inner wall of the reset tube, a left clamping block is fixedly arranged at the other end of the reset sliding shaft, annular seats are respectively clamped on the inner wall of a groove of the left clamping block and the inner wall of a groove of the right clamping block, tension shafts are respectively connected to the opposite surfaces of the two annular seats through bearings in a rotating mode, the arc surface of the tension shafts is fixedly arranged with the inner wall of the tension roller, and the arc surface of the tension roller is in sliding connection with the surface of a printing label.

The beneficial effects of the utility model are as follows:

The printing turnover mechanism is used for turnover printing labels, so that the front and the back of the printing label can be treated in the printing process, and the printing efficiency and the product quality can be improved; the conveying guide adjusting mechanism is used for controlling the position and the direction of the printed labels in the conveying process. The printing label moving device can ensure that the printing label moves accurately and keeps stable trend, can also avoid the problems of offset, dislocation and the like of the printing label, and improves the printing accuracy and consistency; the tension adjusting mechanism is used for controlling the tension of the printed label in the printing process. It is ensured that the printed label maintains proper tension throughout the printing process, thereby improving print quality and stability.

Drawings

FIG. 1 is a schematic diagram of an automatic duplex printing apparatus;

FIG. 2 is a perspective view of a print flipping mechanism of an automatic duplex printing apparatus;

FIG. 3 is a perspective view of a transport guide adjustment mechanism of an automatic duplex printing apparatus;

Fig. 4 is a perspective view of a tension adjusting mechanism of an automatic duplex printing apparatus.

In the figure: 1. a printer apparatus frame; 2. a slide rail; 3. a slide block; 4. a support rod; 5. a vertical standing board; 6. a printing turnover mechanism; 61. a horizontal conveying overturning roller; 62. a vertical conveying overturning roller; 63. a horizontal rotating shaft; 64. a vertical connecting plate; 65. a connecting seat; 66. a vertical rotating shaft; 67. a connecting pipe; 7. a conveying guide adjusting mechanism; 71. tilting the conveying turnover roller; 72. a fixed pin shaft; 73. an adjustment tank; 74. a right adjusting block; 75. a right-handed screw; 76. a right-handed nut; 77. a limit seat; 78. adjusting the rotating shaft; 79. a knob; 710. a sliding seat; 711. a connecting pin shaft; 712. a left regulating block; 713. a left-handed screw; 714. a left-handed nut; 715. a fine tuning tube; 8. a tension adjusting mechanism; 81. a tension roller; 82. a tension driving seat; 83. a tension driving groove; 84. a threaded rod; 85. a right clamp block; 86. a reset tube; 87. a return spring; 88. resetting the sliding shaft; 89. a left clamp block; 810. an annular seat; 811. tension shaft.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments.

Referring to fig. 1-4, an automatic double-sided printing device comprises a printing machine equipment frame 1, wherein a sliding rail 2 is fixedly arranged at the top of one end of the printing machine equipment frame 1, a sliding block 3 is inserted at the top of the sliding rail 2 in a sliding manner, and supporting rods 4 are distributed in a linear array on the inner bottom wall of the other end of the printing machine equipment frame 1.

The device is specifically implemented in such a way that the sliding rail 2 and the sliding block 3 are arranged to be in sliding fit, so that the device can horizontally slide on the surface of the frame body of the printing equipment, the overturning position can be conveniently adjusted, and the device can be used in an enhanced mode according to printing requirements.

A vertical standing board 5 is fixedly arranged on one side surface of the sliding rail 2, and a printing turnover mechanism 6, a conveying guide adjusting mechanism 7 and a tension adjusting mechanism 8 are respectively arranged on one side of the vertical standing board 5.

In order to realize the action of automatically turning over and converting the other side to convey printing after printing one side of the printed label; the printing turnover mechanism 6 comprises a horizontal conveying turnover roller 61 and a vertical conveying turnover roller 62, wherein the top end surface and the bottom end surface of one side of the vertical standing board 5 are respectively connected with a horizontal rotating shaft 63 through bearings in a rotating manner, one ends of the four horizontal rotating shafts 63 are respectively connected with a vertical connecting plate 64 through bearings in a rotating manner, and the arc surface of the horizontal rotating shafts 63 is fixedly arranged on the surface of the horizontal conveying turnover roller 61.

Specifically, the four horizontal conveying turnover rollers 61 and the two vertical conveying turnover rollers 62 are arranged to be distributed in a rectangular array of the four horizontal conveying turnover rollers 61 and are also arranged vertically to the two vertical conveying turnover rollers 62 and are located on one side, so that the effect that the printed labels can be conveyed and printed on both sides by conveying and winding the surfaces of the four horizontal conveying turnover rollers 61 and the two vertical conveying turnover rollers 62 after the printed labels are printed is achieved.

The connecting seat 65 is fixedly installed on the top end surface and the bottom end surface of one side of the vertical connecting plate 64, two vertical rotating shafts 66 are rotatably connected to two opposite surface ends of the two connecting seats 65 through bearings, the arc surfaces of the vertical rotating shafts 66 are fixedly installed on the surfaces of the vertical conveying overturning rollers 62, the surfaces of the two vertical conveying overturning rollers 62 and the surfaces of the four horizontal conveying overturning rollers 61 are slidably inserted into the surfaces of printing labels, a connecting pipe 67 is rotatably connected to the bottom surface of the connecting seat 65 installed at the bottom end of the vertical connecting plate 64 through bearings, and the inner wall of the connecting pipe 67 is in threaded connection with the top end of the supporting rod 4.

Specifically so implemented, the installation of connecting seat 65 controls its both ends fixed mounting vertical pivot 66 respectively to and through bearing rotation connection realization printing label can follow the supplementary effect of rotation in surface transmission, still through setting up connecting pipe 67 in the bottom, when being convenient for this tilting mechanism remove the position that needs the upset, utilize the bracing piece 4 connection support's of bottom effect.

In order to realize the control of the printing label turning operation by the printing turning mechanism 6, the guiding, conveying and adjusting actions are carried out; the conveying guide adjusting mechanism 7 is provided with two groups, and is respectively located at two sides of the printing turnover mechanism 6, the conveying guide adjusting mechanism 7 comprises an inclined conveying turnover roller 71, a fixed pin shaft 72 is fixedly installed at one end top of the vertical standing plate 5 and one end bottom of the vertical connecting plate 64, and an adjusting groove 73 is formed in the other end bottom of the vertical standing plate 5 and the other end top of the vertical connecting plate 64.

Specifically, in the print reverse conveyance, in order to facilitate the print label always being positioned in the center conveyance to prevent the eccentric movement to both sides from causing the squeeze folding to affect the quality, the inclined conveyance reverse roller 71 is provided to perform the adjustment operation, thereby enhancing the print label conveyance to stably improve the quality.

In order to realize the adjustment operation of the tilting conveying turnover roller 71, a right adjusting block 74 is rotatably connected to the circular arc surface of the fixed pin shaft 72 through a bearing, a right-handed screw 75 is fixedly installed at one end of the right adjusting block 74, a right-handed screw 713 is fixedly installed on one side surface of the right-handed screw 75, a limit seat 77 is fixedly installed on the inner bottom wall of the adjusting groove 73, an adjusting rotating shaft 78 is rotatably connected to the surface of the limit seat 77 and the inner top wall of the adjusting groove 73 through the bearing, a knob 79 is fixedly installed at the bottom end of the adjusting rotating shaft 78, a sliding seat 710 is in threaded connection with the circular arc surface of the adjusting rotating shaft 78, the surface of the sliding seat 710 is in sliding connection with the inner wall of the adjusting groove 73, a connecting pin shaft 711 is fixedly installed on the surface of the sliding seat 710, a left adjusting block 712 is in threaded connection with the bearing, a left-handed screw 713 is fixedly installed on one side surface of the left-handed screw 713, a fine tuning pipe 715 is in threaded connection with the surface of the left-handed screw 713, the circular arc surface of the fine tuning pipe 715 is in rotational connection with the inner wall of the tilting conveying turnover roller 71 through the bearing, the two tilting conveying turnover rollers 71 are in sliding connection with the horizontal label winding surface of the tilting conveying roller 71, and the tag winding surface of the tag winding on the tilting conveying roller is perpendicular to the surface of the tilting conveying roller 71.

In particular, when adjustment is needed, the control knob 79 is rotated to drive the adjusting screw to rotate through the reverse direction of the offset of the printing label, the sliding seat 710 in threaded connection is moved, so that the connecting pin 711 on the surface is driven to move, the left-handed screw 713 and the right-handed screw 75 of the fine-tuning tube 715 are extended or retracted to reset in the fine-tuning tube 715 by rotating the fine-tuning tube 715, after adjustment is finished, the fine-tuning tube 715 is locked to avoid rotation by utilizing the locking of the left-handed nut 714 and the right-handed nut 76, and the rotation of the knob 79 is stopped at the moment, so that one end of the printing surface wound on the surface of the inclined conveying turnover roller 71 is vertically distributed with the other end, and then the four horizontal conveying turnover rollers 61, the two vertical conveying turnover rollers 62 and the two inclined conveying guide rollers are matched to enable the printing label to be turned.

In order to realize the action of tension adjustment when the printing turnover mechanism 6 drives the printing label to change the printing surface; the tension adjusting mechanism 8 comprises tension rollers 81, tension driving seats 82 are fixedly mounted on the left side surface of the vertical standing plate 5 and the left side surface of the vertical connecting plate 64, tension driving grooves 83 are formed in the surfaces of the two tension driving seats 82, threaded rods 84 are connected with the right inner walls of the tension driving grooves 83 in a threaded mode, and right clamping blocks 85 are fixedly mounted at one ends of the threaded rods 84.

Specifically, tension rollers 81 are provided to tension the printed label when the printed label is conveyed and turned over, so that the printed label is conveyed stably, and offset falling caused by loose conveying is avoided.

One side surface fixed mounting of tension driving seat 82 has reset tube 86, the inner wall of reset tube 86 and the inner wall fixed intercommunication of tension driving groove 83, reset spring 87 is fixed to the one end left end inner wall fixed mounting of reset tube 86, reset slide shaft 88 is fixed to the one end fixed mounting of reset spring 87, the one end circular arc surface of reset slide shaft 88 and the inner wall slip grafting of reset tube 86, the other end fixed mounting of reset slide shaft 88 has left clamp splice 89, the equal joint of recess inner wall of left clamp splice 89 and the recess inner wall of right clamp splice 85 has annular seat 810, the opposite surface of two annular seats 810 is connected with tension axle 811 through the bearing rotation, the circular arc surface of tension axle 811 and the inner wall fixed mounting of tension roller 81, the circular arc surface of tension roller 81 and the surface slip grafting of printing label.

In tension adjustment, the right clamping block 85 is controlled to push the annular seat 810 to move by rotating the threaded rod 84, so that the reset sliding shaft 88 of the right clamping block is pressed by the reset spring 87 to compress, or the right clamping block 85 is controlled to be far away from the annular seat 810, and the left clamping block 89 is controlled to push the annular seat 810 to move under the compression elasticity of the reset spring 87, so that the effect of driving the tension roller 81 to move to press the printed label to perform tension adjustment is achieved.

The device carries the inside of printing tilting mechanism 6 after printing one side in the printing label printing operation again, carries the conversion, makes the surface of its printing overturn to control the one side upset of not printing and come to realize that both sides can both carry out printing operation, need demolish when avoiding current needs printing another side and reinstallate printing, still carry out tension adjustment and direction regulation to its printing in printing upset simultaneously, control printing label and rise throughout and be located central transport operation, avoid carrying the off tracking, thereby reinforcing printing quality reduces the damage.

The printing turnover mechanism 6 is used for turnover printing labels, so that the front and the back of the printing labels can be treated in the printing process, and the printing efficiency and the product quality can be improved; the transport guide adjustment mechanism 7 is used to control the position and orientation of the printed labels during transport. The printing label moving device can ensure that the printing label moves accurately and keeps stable trend, can also avoid the problems of offset, dislocation and the like of the printing label, and improves the printing accuracy and consistency; the tension adjustment mechanism 8 is used to control the tension of the printed label during printing. It is ensured that the printed label maintains proper tension throughout the printing process, thereby improving print quality and stability.

Working principle: after the printing of the printed label is finished, the printed label is controlled to be conveyed into the tension adjusting mechanism 8 through the horizontal conveying turnover rollers 61 on the left side of the bottom of the vertical standing board 5, the printed label is continuously contacted with the surfaces of the two horizontal conveying turnover rollers 61 on the top of the vertical standing board 5 through surface contact of the tension rollers 81, continuously downward and downwards in winding contact with the surfaces of the inclined conveying turnover rollers 71 on the right side of the vertical standing board 5, the printed label is continuously conveyed through contact with the surfaces of the two vertical conveying turnover rollers 62 vertically arranged on one side of the vertical connecting board 64, continuously conveyed through the surfaces of the inclined conveying turnover rollers 71 on the left side, and finally conveyed into the printing mechanism through the surfaces of the horizontal conveying turnover rollers 61 on the right side of the bottom of the vertical standing board 5 for printing operation;

After the overturning connection conveying, the corresponding adjustment setting is carried out according to the conveying reverse direction and the tension in conveying, so that the surface of the inclined conveying overturning roller 71 is tensioned, the inclined angle setting of the inclined conveying overturning roller 71 is controlled, and the printing surface is vertically distributed and conveyed on the surface of the inclined conveying overturning roller 71.

The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, should make equivalent substitutions or modifications according to the technical scheme of the present utility model and the inventive concept thereof, and should be covered by the scope of the present utility model.

Claims (7)

1. An automatic duplex printing apparatus comprising a printing press equipment frame (1), characterized in that: a sliding rail (2) is fixedly arranged at the top of one end of the printer equipment frame body (1), a sliding block (3) is inserted at the top of the sliding rail (2) in a sliding manner, and supporting rods (4) are distributed on the inner bottom wall of the other end of the printer equipment frame body (1) in a linear array manner;

A vertical standing plate (5) is fixedly arranged on the surface of one side of the sliding rail (2), and a printing turnover mechanism (6), a conveying guide adjusting mechanism (7) and a tension adjusting mechanism (8) are respectively arranged on one side of the vertical standing plate (5);

The printing turnover mechanism (6) realizes the action of automatically turnover and conversion of the other side to convey printing after one side is printed by the printed label;

The conveying guide adjusting mechanism (7) realizes the action of guiding conveying adjustment in the process of controlling the printing label to turn over by the printing turning mechanism (6);

The tension adjusting mechanism (8) realizes the action of tension adjustment when the printing turnover mechanism (6) drives the printing label to change the printing surface.

2. An automatic duplex printing arrangement as in claim 1 wherein: the printing turnover mechanism (6) comprises a horizontal conveying turnover roller (61) and a vertical conveying turnover roller (62), a horizontal rotating shaft (63) is rotatably connected to the top end surface and the bottom end surface of one side of the vertical standing plate (5) through bearings, vertical connecting plates (64) are rotatably connected to one ends of the four horizontal rotating shafts (63) through bearings, and the arc surfaces of the horizontal rotating shafts (63) are fixedly mounted on the surfaces of the horizontal conveying turnover roller (61).

3. An automatic duplex printing arrangement as in claim 2 wherein: the automatic printing device is characterized in that a connecting seat (65) is fixedly installed on the top end surface and the bottom end surface of one side of a vertical connecting plate (64), two vertical rotating shafts (66) are rotatably connected to two opposite surface ends of the connecting seat (65) through bearings, the arc surfaces of the vertical rotating shafts (66) are fixedly installed on the surfaces of vertical conveying overturning rollers (62), the surfaces of the vertical conveying overturning rollers (62) and the surfaces of the horizontal conveying overturning rollers (61) are slidably inserted into the surfaces of printing labels, connecting pipes (67) are rotatably connected to the bottom surface of the connecting seat (65) installed at the bottom end of the vertical connecting plate (64) through bearings, and the inner walls of the connecting pipes (67) are in threaded connection with the top ends of supporting rods (4).

4. An automatic duplex printing arrangement as in claim 2 wherein: the conveying guide adjusting mechanisms (7) are arranged in two groups and are respectively located at two sides of the printing turnover mechanism (6), the conveying guide adjusting mechanisms (7) comprise inclined conveying turnover rollers (71), fixing pins (72) are fixedly installed at one end top of the vertical standing plate (5) and one end bottom of the vertical connecting plate (64), and adjusting grooves (73) are formed in the other end bottom of the vertical standing plate (5) and the other end top of the vertical connecting plate (64).

5. An automatic duplex printing arrangement as in claim 4 wherein: the circular arc surface of the fixed pin shaft (72) is rotationally connected with a right adjusting block (74) through a bearing, one end of the right adjusting block (74) is fixedly provided with a right-handed screw (75), the surface of the right-handed screw (75) is in threaded connection with a right-handed nut (76), the inner bottom wall of the adjusting groove (73) is fixedly provided with a limiting seat (77), the surface of the limiting seat (77) and the inner top wall of the adjusting groove (73) are both rotationally connected with an adjusting rotating shaft (78) through a bearing, the bottom end of the adjusting rotating shaft (78) is fixedly provided with a knob (79), the circular arc surface of the adjusting rotating shaft (78) is in threaded connection with a sliding seat (710), the surface of the sliding seat (710) is in sliding connection with the inner wall of the adjusting groove (73), the surface of the sliding seat (710) is fixedly provided with a connecting pin shaft (711), the circular arc surface of the connecting pin shaft (711) is rotationally connected with a left adjusting block (712) through a bearing, one side surface of the left-handed screw (713) is fixedly provided with a left-handed screw (713), the surface of the left-handed screw (713) is connected with the threaded nut (715) through the inner wall of the rotating screw (71), one end of the pipe is in threaded connection with the inner wall (715) of the pipe (71) through the rotating screw (71), the surfaces of the two inclined conveying turnover rollers (71) are in sliding connection with the surface of a printed label, and labels wound on the surfaces of the inclined conveying turnover rollers (71) and labels wound on the surfaces of the horizontal conveying turnover rollers (61) are vertically distributed.

6. An automatic duplex printing arrangement as in claim 2 wherein: tension adjustment mechanism (8) are including tension roller (81), perpendicular left side surface of standing board (5) with the left side surface of perpendicular connecting plate (64) is all fixed mounting has tension drive seat (82), two tension drive groove (83) have all been seted up on the surface of tension drive seat (82), the right side inner wall threaded connection of tension drive groove (83) has threaded rod (84), the one end fixed mounting of threaded rod (84) has right clamp splice (85).

7. An automatic duplex printing arrangement as in claim 6 wherein: one side surface fixed mounting of tension driving seat (82) has reset tube (86), the inner wall of reset tube (86) with the inner wall fixed intercommunication of tension driving groove (83), the one end left end inner wall fixed mounting of reset tube (86) has reset spring (87), the one end fixed mounting of reset spring (87) has reset slide shaft (88), the one end circular arc surface of reset slide shaft (88) with the inner wall slip grafting of reset tube (86), the other end fixed mounting of reset slide shaft (88) has left clamp splice (89), the recess inner wall of left clamp splice (89) with the recess inner wall of right clamp splice (85) all joint has annular seat (810), two

The opposite surfaces of the annular seat (810) are respectively connected with a tension shaft (811) through bearings in a rotating way,

The arc surface of the tension shaft (811) is fixedly arranged with the inner wall of the tension roller (81),

The arc surface of the tension roller (81) is in sliding connection with the surface of the printed label.