CN216733547U - Sign indicating number device and case packer - Google Patents

Abstract

The utility model discloses an ink recorder, include: a frame; the printing mechanism is arranged on the rack and used for printing codes on the surface of the box body; an ink tank for storing ink; the ink supply mechanism is arranged between the ink barrel and the printing mechanism and used for conveying ink to the printing mechanism; and the regulating mechanism is connected with the ink supply mechanism and used for detecting the ink amount in the ink supply mechanism and controlling the ink barrel to convey the ink to the ink supply mechanism. The utility model discloses can realize automatic seal code, effectively improve seal code quality and production efficiency. The utility model also provides a case sealer.

Description

Sign indicating number device and case packer

Technical Field

The utility model relates to a vanning packing technical field, in particular to seal sign indicating number device and case packer.

Background

In cigarette packaging production, products are loaded into a box body through an automatic box filling and sealing machine and are sealed. In order to distinguish machine numbers of the automatic box filling and sealing machine and realize that finished products are placed in batches by the extension stations, batch number information such as production units, machine numbers of production machines and the like is clearly marked on the appearance of the box body. In the prior art, batch number information is printed on the outer surface of a box body in a manual stamping mode. The seal is a traditional handheld seal, manual pressing is needed during use, ink needs to be supplemented in stages, and uneven imprinting depth is easily caused due to unbalanced manual force application; when too much ink is added into the seal, the problems of blurred print, pattern code, box pollution and the like caused by ink overflow are easily caused; with the consumption of ink in the seal, the imprints on different boxes are easy to have different depths and poor consistency; in mass production, the labor intensity of operators is high, and the problems of missing printing and the like are easily caused along with the reduction of physical strength. In summary, the problems of low code printing efficiency and poor code printing quality exist in the prior art of adopting manual code printing.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that the box seal code is inefficient and the seal code quality is poor. The utility model provides an ink recorder can realize automatic ink recorder, effectively improves ink recorder quality and production efficiency.

In order to solve the above technical problem, an embodiment of the utility model discloses an ink recorder, include:

a frame;

the printing mechanism is arranged on the rack and used for printing codes on the surface of the box body;

an ink tank for storing ink;

the ink supply mechanism is arranged between the ink barrel and the printing mechanism and used for conveying ink to the printing mechanism;

and the regulating mechanism is connected with the ink supply mechanism and used for detecting the ink amount in the ink supply mechanism and controlling the ink barrel to convey the ink to the ink supply mechanism.

Optionally, the printing mechanism comprises:

a print head;

the cylinder is arranged on the frame;

and the buffer unit is arranged between the printing head and the air cylinder and is connected with the printing head and the air cylinder.

Optionally, a feeding port is arranged on the printing head and connected with the ink supply mechanism.

Optionally, the cylinder is a double rod cylinder.

Optionally, a baffle is disposed on the print head, and the buffer unit includes:

the hollow rod is internally provided with a cavity, and the first end of the hollow rod is connected with the output end of the air cylinder;

the stopping part is connected with the second end of the hollow rod, and is provided with a through hole which is communicated with the cavity;

the first end of the telescopic rod is arranged in the cavity, and the second end of the telescopic rod penetrates through the through hole and is connected with the baffle;

the elastic piece is arranged between the stopping part and the baffle.

Optionally, the elastic member is a spring, the spring is sleeved on the telescopic rod, one end of the spring abuts against the stopping portion, and the other end of the spring abuts against the baffle.

Optionally, the diameter of the through hole is smaller than that of the cavity and larger than that of the telescopic rod, the upper end of the telescopic rod is provided with an anti-falling part, and the diameter of the anti-falling part is larger than the inner diameter of the through hole.

Optionally, the ink supply mechanism includes,

the upper end of the first pipeline is communicated with a discharge hole of the ink barrel, and the lower end of the first pipeline is communicated with the printing mechanism;

the lower extreme of second pipeline is linked together with the middle part of first pipeline, and the upper end of second pipeline is higher than the upper surface of printing ink bucket or flushes with the upper surface of printing ink bucket.

Optionally, the regulating mechanism comprises:

the liquid level controller is arranged on the second pipeline and used for detecting the amount of the printing ink in the second pipeline;

the electromagnetic valve is arranged at the joint of the first pipeline and the ink barrel, is electrically connected with the liquid level controller and is used for controlling the ink barrel to convey ink to the ink supply mechanism;

and the alarm unit is electrically connected with the liquid level controller and is used for giving an alarm when the ink amount in the ink supply mechanism is insufficient.

Optionally, the first and second conduits are both hoses.

Optionally, a filter mantle is arranged at the upper end of the second pipeline and is communicated with the external environment through the filter mantle.

Optionally, the liquid level controller comprises:

a control unit;

the first sensor is electrically connected with the control unit and used for sending a signal to the control unit when the liquid level of the ink is higher than that of the first sensor so as to close the electromagnetic valve;

the second sensor is arranged below the first sensor, is electrically connected with the control unit and is used for sending a signal to the control unit when the liquid level of the printing ink is lower than that of the second sensor so as to open the electromagnetic valve;

and the third sensor is arranged below the second sensor, is electrically connected with the control unit and the alarm unit, and is used for sending a signal to the control unit to trigger the alarm unit when the liquid level of the ink is lower than the third sensor.

The utility model also provides a case packer, including aforementioned arbitrary seal sign indicating number device.

Optionally, the method further comprises:

the conveying belt is arranged below the printing mechanism and used for conveying the box body;

the image collector is arranged on the rack and used for identifying the printing code on the box body;

and the rejecting mechanism is arranged on the rack, is electrically connected with the image collector and is used for rejecting the box body which cannot be identified by the image collector.

Compared with the prior art the utility model discloses following beneficial effect has:

the embodiment of the utility model provides a pass through printing mechanism and automatically seal the sign indicating number to the box surface, compare very big improvement with the artifical hand-held type sign indicating number method of adoption among the prior art and seal code efficiency, the while has also avoided artifical sign indicating number to cause the poor quality problems of uniformity, through the volume that regulation and control mechanism control printing ink bucket carried printing ink to supplying ink mechanism and printing mechanism, it is poor to have avoided the seal code uniformity that printing mechanism printing ink volume fluctuation arouses, the uneven quality problems of depth, prevent because of printing ink too much causes the flower sign indicating number, the blurred quality problems who pollutes the box of trace.

Drawings

Fig. 1 is a view showing an overall structure of an ink recorder according to an embodiment of the present invention;

fig. 2 is a structural view of a printing mechanism according to an embodiment of the present invention.

Reference numerals:

1. the printer comprises a frame, 2, a printing mechanism, 21, a printing head, 211, a feeding port, 212, a baffle, 22, an air cylinder, 23, a buffer unit, 230, a cavity, 231, a hollow rod, 232, a stopping part, 233, a telescopic rod, 234, an elastic part, 235, a through hole, 236, an anti-dropping part, 3, a box body, 4, an ink barrel, 5, an ink supply mechanism, 51, a first pipeline, 52, a second pipeline, 521, a filter cover, 6, a regulating mechanism, 61, a liquid level controller, 611, a first sensor, 612, a second sensor, 613, a third sensor, 62, an electromagnetic valve, 63, an alarm unit, 7, a conveying belt, 8, an image collector and 9, and a removing mechanism.

Detailed Description

The following description is provided for illustrative embodiments of the present invention, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. While the invention will be described in conjunction with the preferred embodiments, it is not intended that features of the invention be limited to only those embodiments. On the contrary, the intention of implementing the novel features described in connection with the embodiments is to cover alternatives or modifications as may be included in the appended claims. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The invention may be practiced without these particulars. Moreover, some of the specific details are omitted from the description so as not to obscure or obscure the focus of the present invention. It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

It should be noted that in this specification, like reference numerals and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the present invention are usually placed in when used, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or the element to which the present invention is directed must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.

The terms "first," "second," "third," and the like are used solely to distinguish one from another as to indicate or imply relative importance.

In the description of the present embodiment, it should be further noted that, unless explicitly stated or limited otherwise, the terms "disposed," "connected," and "connected" are to be interpreted broadly, e.g., as a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present embodiment can be understood in specific cases by those of ordinary skill in the art.

In order to make the objects, technical solutions and advantages of the present invention clearer, embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

An embodiment of the utility model provides an ink recorder, as shown in FIG. 1, include:

a frame 1;

the printing mechanism 2 is arranged on the frame 1 and used for printing codes on the surface of the box body 3;

an ink tank 4 for storing ink;

the ink supply mechanism 5 is arranged between the ink barrel 4 and the printing mechanism 2 and used for conveying ink to the printing mechanism 2;

and the regulating mechanism 6 is connected with the ink supply mechanism 5 and is used for detecting the ink amount in the ink supply mechanism 5 and controlling the ink barrel 4 to supply the ink to the ink supply mechanism 5.

By adopting the embodiment of the technical scheme, codes are automatically printed on the surface of the box body 3 through the printing mechanism 2, compared with the manual handheld code printing method adopted in the prior art, the code printing efficiency is greatly improved, meanwhile, the quality problem of poor consistency caused by manual code printing is avoided, the quantity of the printing ink which is conveyed to the ink supply mechanism 5 and the printing mechanism 2 through the ink barrel 4 is controlled by the regulating and controlling mechanism 6, the quality problems of poor consistency and uneven depth of the codes caused by fluctuation of the ink quantity in the printing mechanism 2 are avoided, and the quality problems of marks, fuzzy prints and pollution to the box body 3 caused by excessive printing ink are prevented.

Further, the printing mechanism 2 includes:

a print head 21;

the cylinder 22 is arranged on the frame 1;

and a buffer unit 23 provided between the printing head 21 and the air cylinder 22 and connected to the printing head 21 and the air cylinder 22. The buffer unit 23 arranged between the printing head 21 and the air cylinder 22 can effectively reduce the impact force of the printing head 21 on the box body 3 and prevent the box body 3 from being damaged at the moment that the printing head 21 collides with the box body 3.

Further, as shown in fig. 2, the print head 21 is provided with a feed port 211, and the feed port 211 is connected to the ink supply mechanism 5.

Further, the cylinder 22 is a double rod cylinder. Adopt two pole cylinders to promote to beat printer head 21 and seal the sign indicating number, can make and beat printer head 21 atress balance, the uneven quality problem of seal sign indicating number colour depth that leads to because of the unbalanced stress when effectively having avoided single pole cylinder to seal the sign indicating number.

Further, as shown in fig. 2, the print head 21 is provided with a baffle 212, and the buffer unit 23 includes:

a hollow rod 231 having a cavity 230 therein, a first end of the hollow rod 231 being connected to an output end of the cylinder 22;

a stopper 232 connected to the second end of the hollow rod 231, the stopper 232 having a through hole 235, the through hole 235 being communicated with the cavity 230;

a first end of the telescopic rod 233 is arranged in the cavity 230, and a second end of the telescopic rod 233 passes through the through hole 235 and is connected with the baffle plate 212; when the print head 21 is pressed against the box 3, the telescopic rod 233 is pressed into the cavity 230 by a force toward the hollow rod 231, which acts as a buffer and reduces the impact of the print head 21 on the box 3.

The elastic member 234 is disposed between the stopping portion 232 and the blocking plate 212. The elastic member 234 can slowly retract the telescopic bar 233 into the cavity 230 by applying an elastic force to the shutter 212 when the print head 21 is pressed against the casing 3; and the extension bar 233 is restored to the original state by applying an elastic force to the barrier 212 when the printing head 21 is apart from the cabinet 3.

Further, the elastic member 234 is a spring, the spring is sleeved on the telescopic rod 233, one end of the spring abuts against the stop portion 232, and the other end of the spring abuts against the baffle 212.

Further, the diameter of the through hole 235 is smaller than the diameter of the cavity 230 and larger than the diameter of the telescopic rod 233, the upper end of the telescopic rod 233 is provided with a retaining part 236, and the diameter of the retaining part 236 is larger than the inner diameter of the through hole 235. By adopting the technical scheme, the telescopic rod 233 can be prevented from being separated from the cavity 230.

Further, the ink supply mechanism 5 includes,

a first duct 51, the upper end of the first duct 51 is communicated with the discharge port of the ink barrel 4, and the lower end is communicated with the printing mechanism 2;

and a second pipe 52, a lower end of the second pipe 52 communicating with a middle portion of the first pipe 51, and an upper end of the second pipe 52 being higher than an upper surface of the ink barrel 4 or flush with the upper surface of the ink barrel 4. Specifically, the upper end of the second pipeline 52 and the upper end of the ink barrel 4 are communicated with the external environment, the first pipeline 51, the ink barrel 4 and the second pipeline 52 are combined into a Y-shaped communicator, the regulating mechanism 6 can control the connection and disconnection between the ink barrel 4 and the first pipeline 51, and when the ink barrel 4 is disconnected from the first pipeline 51, the ink barrel 4 stops delivering ink to the first pipeline 51; at this time, if the first tube 51 cannot be communicated with the atmosphere, the first tube 51 is in a closed state, the air pressure in the first tube 51 is gradually reduced along with the outflow of the ink, and when the air pressure in the first tube 51 is reduced to a certain degree, the ink cannot flow downward to the printing mechanism 2 under the action of gravity, so that the ink cannot flow smoothly. By using the second duct 52 to communicate with the first duct 51 without closing the upper end of the second duct 52, the first duct 51 can be indirectly communicated with the atmosphere, and the ink in the first duct 51 can smoothly flow into the printing mechanism 2 by its own weight.

Further, the regulating mechanism 6 includes:

the liquid level controller 61 is provided in the second duct 52, and detects the liquid level of the ink in the second duct 52, thereby being able to estimate the amount of the ink in the second duct 52. Since the second conduit 52 forms a communicating vessel structure with the first conduit 51, the liquid level controller 61 can indirectly detect the amount of ink in the first conduit 51 as well;

and an electromagnetic valve 62 provided at a connection of the first pipe 51 and the ink tank 4, the electromagnetic valve 62 being electrically connected to the liquid level controller 61, the liquid level controller 61 being capable of opening or closing the electromagnetic valve 62 when detecting that the liquid level of the ink in the second pipe 52 reaches a set height to control the ink tank 4 to feed the ink to the ink supply mechanism 5. Specifically, the electromagnetic valve 62 can control the communication and disconnection state between the ink tank 4 and the first duct 51 by opening and closing: when the solenoid valve 62 is opened, the ink tank 4 supplies ink to the first pipe 51 and the second pipe 52, and buffers the ink into the second pipe 52; when the solenoid valve 62 is closed, the ink tank 4 stops feeding ink to the first conduit 51, and the ink flows back from the second conduit 52 into the first conduit 51 and continues along the first conduit 51 into the printing mechanism 2. The ink volume of buffering in the second pipeline 52 is far less than the ink volume in the ink bucket 4 to when having avoided ink bucket 4 directly to printing mechanism 2 transport printing ink through first pipeline 51, because of a large amount of printing ink in the ink bucket 4 to first pipeline 51 or printing mechanism 2 production pressure too big cause printing ink to leak, or to printing mechanism 2 transport printing ink flow too big make the seal sign indicating number fuzzy or flower sign indicating number.

It should be noted that the solenoid valve 62 is opened for a period much shorter than the closing period, so that the time for directly delivering the ink from the ink tank 4 to the printing mechanism 2 through the first conduit 51 is extremely short, and the situation of excessive ink in the printing mechanism 2 is not caused. An alarm unit 63 electrically connected to the liquid level controller 61 for giving an alarm when the amount of ink in the ink supply mechanism 5 is insufficient.

Further, the first pipe 51 and the second pipe 52 are both hoses. The hose is adopted to convey the printing ink, so that the heights of the printing ink barrel 4 and the liquid level controller 61 are convenient to adjust, and the printing effect of the printing device can be optimized according to the use requirement; secondly, the flexible tube is adopted to convey the printing ink, so that the printing head 21 can reciprocate in the code printing process.

Further, the upper end of the second pipe 52 is provided with a filter cover 521, and is communicated with the external environment through the filter cover 521. The filter cover 521 can prevent dust in the external environment from entering the second pipeline 52 to pollute the ink.

Further, the liquid level controller 61 includes:

a control unit;

a first sensor 611 electrically connected to the control unit for sending a signal to the control unit when the level of the ink is higher than the first sensor 611, and then the control unit 611 controls the electromagnetic valve 62 to close; the ink barrel 4 stops feeding the ink into the first pipeline 51, the liquid level height of the ink is limited below the first sensor 611, and quality problems of liquid leakage or excessive ink discharge caused by large pressure on the printing head 21 due to the fact that the liquid level of the ink is too high can be prevented, such as pattern code, print blur and the like. In this embodiment, the installation height of the first sensor 611 can be adjusted, the installation height of the first sensor 611 is the same as the height of the maximum value of the liquid level set in the second pipe 52, and the adjustment of the maximum value of the liquid level in the second pipe 52 can be realized by adjusting the installation height of the first sensor 611.

A second sensor 612 disposed below the first sensor 611 and electrically connected to the control unit, for sending a signal to the control unit to open the electromagnetic valve 62 when the liquid level of the ink is lower than the second sensor 612; the ink barrel 4 starts to convey ink into the first pipeline 51, so that the printing chroma of the printing head 21 is prevented from being gradually lightened due to insufficient ink, and the consistency of the printing effect is prevented from being reduced. In this embodiment, the installation height of the second sensor 612 can be adjusted, the installation height of the second sensor 612 is the same as the height of the minimum set liquid level in the second pipe 52, and the adjustment of the minimum liquid level in the second pipe 52 can be realized by adjusting the installation height of the second sensor 612.

And a third sensor 613 disposed below the second sensor 612 and electrically connected to the control unit and the alarm unit 63, for sending a signal to the control unit to trigger the alarm unit 63 when the liquid level of the ink is lower than the third sensor 613. If the liquid level of the ink is lower than the second sensor 612 and the ink barrel 4 does not timely deliver the ink to the first pipeline 51, and when the liquid level of the ink is lower than the third sensor 613, it indicates that the ink in the ink barrel 4 is used up or the electromagnetic valve 62 cannot be opened, and at this time, the control unit can trigger the alarm unit 63 to remind an operator to timely replenish the ink barrel 4 with the ink or check whether the electromagnetic valve 62 fails. In this embodiment, the installation height of the third sensor 613 may be adjusted, the installation height of the third sensor 613 is the same as the set early warning liquid level height in the second pipeline 52, and the adjustment of the early warning liquid level height in the second pipeline 52 may be achieved by adjusting the installation height of the third sensor 613.

The embodiment of the utility model provides a case sealer is still provided, including aforementioned arbitrary seal sign indicating number device.

Further, still include:

the conveyer belt 7 is arranged below the printing mechanism 2 and used for conveying the box body 3; the boxes 3 are continuously conveyed to the lower part of the printing mechanism 2, so that the printing mechanism 2 can continuously perform code printing operation on each box 3, and the code printing efficiency is improved.

The image collector 8 is arranged on the rack 1 and used for identifying the printing code on the box body 3; specifically, image collector 8 locates printing mechanism 2 along the low reaches station of 7 traffic directions of conveyer belt, and image collector 8 judges the seal code quality through the seal code on the discernment box 3, is favorable to improving product quality.

And the rejecting mechanism 9 is arranged on the rack 1, is electrically connected with the image collector 8 and is used for rejecting the box body 3 which cannot be identified by the image collector 8. In this embodiment, the rejecting mechanism 9 can adopt the cylinder to push the box 3 which can not be identified with the code out of the conveyer belt 7, can also adopt the guide plate to change the running route of the box 3 to leave the conveyer belt 7, and can also adopt the mechanical arm to grab the box 3 out of the conveyer belt 7. The specific structure of the removing mechanism 9 is not limited, and the structure of the device for removing the box 3 from the conveyor belt 7 should be considered.

While the invention has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that the foregoing is a more detailed description of the invention, and the specific embodiments thereof are not to be considered as limiting. Various changes in form and detail, including simple deductions or substitutions, may be made by those skilled in the art without departing from the spirit and scope of the invention.

Claims (14)

1. An imprinting apparatus, comprising:

a frame (1);

the printing mechanism (2) is arranged on the rack (1) and is used for printing codes on the surface of the box body (3);

an ink tank (4) for storing ink;

the ink supply mechanism (5) is arranged between the ink barrel (4) and the printing mechanism (2) and is used for conveying ink to the printing mechanism (2);

regulating and controlling mechanism (6), with supply ink mechanism (5) to link to each other, be used for detecting supply ink volume in the ink mechanism (5), and be used for control ink barrel (4) to supply ink mechanism (5) to carry printing ink.

2. The coding device according to claim 1, characterized in that the printing mechanism (2) comprises:

a print head (21);

the air cylinder (22) is arranged on the frame (1);

and the buffer unit (23) is arranged between the printing head (21) and the air cylinder (22) and is connected with the printing head (21) and the air cylinder (22).

3. The ink marking device according to claim 2, wherein the print head (21) is provided with a feed opening (211), the feed opening (211) being connected to the ink supply mechanism (5).

4. The marking device according to claim 2, characterized in that the cylinder (22) is a double-rod cylinder.

5. The ink recorder according to claim 2, wherein a shutter (212) is provided on the print head (21), and the buffer unit (23) comprises:

a hollow rod (231) provided with a cavity (230) therein, wherein the first end of the hollow rod (231) is connected with the output end of the air cylinder (22);

the stopping part (232) is connected with the second end of the hollow rod (231), a through hole (235) is formed in the stopping part (232), and the through hole (235) is communicated with the cavity (230);

the first end of the telescopic rod (233) is arranged in the cavity (230), and the second end of the telescopic rod (233) penetrates through the through hole (235) and is connected with the baffle (212);

and the elastic piece (234) is arranged between the stopping part (232) and the baffle plate (212).

6. The marking device according to claim 5, wherein the elastic member (234) is a spring, the spring is sleeved on the telescopic rod (233), one end of the spring abuts against the stopping portion (232), and the other end of the spring abuts against the baffle (212).

7. The ink recorder according to claim 6, wherein the diameter of the through hole (235) is smaller than the diameter of the cavity (230) and larger than the diameter of the telescopic rod (233), the telescopic rod (233) is provided at an upper end thereof with a coming-off prevention portion (236), and the diameter of the coming-off prevention portion (236) is larger than the inner diameter of the through hole (235).

8. The marking device according to claim 1, characterized in that the ink supply means (5) comprise,

the upper end of the first pipeline (51) is communicated with the discharge hole of the ink barrel (4), and the lower end of the first pipeline (51) is communicated with the printing mechanism (2);

the lower extreme of second pipeline with the middle part of first pipeline (51) is linked together, the upper end of second pipeline is higher than the upper surface of ink barrel (4) or with the upper surface of ink barrel (4) flushes.

9. The printing device according to claim 8, wherein said regulating means (6) comprise:

the liquid level controller (61) is arranged on the second pipeline and used for detecting the amount of the ink in the second pipeline;

the electromagnetic valve (62) is arranged at the joint of the first pipeline (51) and the ink barrel (4), the electromagnetic valve (62) is electrically connected with the liquid level controller (61), and the electromagnetic valve (62) is used for controlling the ink barrel (4) to convey ink to the ink supply mechanism (5);

and an alarm unit (63) electrically connected to the liquid level controller (61) and configured to give an alarm when the amount of ink in the ink supply mechanism (5) is insufficient.

10. The marking device according to claim 9, characterized in that said first duct (51) and said second duct are both hoses.

11. The printing device according to claim 9, characterized in that the upper end of said second conduit is provided with a filtering mantle (521) and is in communication with the external environment through said filtering mantle (521).

12. The imprinting apparatus of claim 9, wherein the level controller (61) comprises:

a control unit;

a first sensor (611) electrically connected to the control unit for sending a signal to the control unit to close the solenoid valve (62) when the level of ink is higher than the first sensor (611);

the second sensor (612) is arranged below the first sensor (611), is electrically connected with the control unit, and is used for sending a signal to the control unit when the liquid level of the ink is lower than the second sensor (612) so as to open the electromagnetic valve (62);

and the third sensor (613) is arranged below the second sensor (612), is electrically connected with the control unit and the alarm unit (63), and is used for sending a signal to the control unit to trigger the alarm unit (63) when the liquid level of the ink is lower than the third sensor (613).

13. A case sealer characterized by comprising the ink-coding device according to any one of claims 1 to 12.

14. The box sealer as claimed in claim 13, further comprising:

the conveying belt (7) is arranged below the printing mechanism (2) and is used for conveying the box body (3);

the image collector (8) is arranged on the rack (1) and used for identifying the printing codes on the box body (3);

and the rejecting mechanism (9) is arranged on the rack (1), is electrically connected with the image collector (8) and is used for rejecting the box body (3) which can not be identified by the image collector (8) to print codes.

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