CN213973194U - Scraper device and ink-jet printer - Google Patents

Abstract

The embodiment of the utility model provides a scraper device and an ink-jet printer, the scraper device provided by the utility model comprises a holding tank, a rotating component, a driving mechanism and a scraper, wherein the rotating component comprises a rotating shaft and a driving mechanism for driving the rotating shaft to rotate; the scraper is positioned in the accommodating groove and is fixedly connected with the side wall of the rotating shaft; the nozzle assembly comprises a nozzle and a connecting pipe, the nozzle is installed on the side wall of the containing groove, the jet hole of the nozzle faces the rotating shaft, the first end of the connecting pipe is connected with the nozzle, and the second end of the connecting pipe is used for being connected with a water supply mechanism. The utility model also provides an ink jet printer, including mount table, inkjet shower nozzle and above-mentioned scraper device. The utility model provides a scraper device, scraper are after using, and actuating mechanism among the rotating assembly drives the pivot and rotates, and then drives the axis rotation that the scraper revoluted the axle. When the scraper rotates to be opposite to the position of the nozzle assembly, water is sprayed from the spraying hole of the nozzle assembly to clean the surface of the scraper, and then residual ink on the surface of the scraper is removed.

Description

Scraper device and ink-jet printer

Technical Field

The embodiment of the utility model provides a relate to the printer technology, especially relate to a scraper device and ink jet printer.

Background

After an ink jet nozzle of an ink jet printer moves from a maintenance station to a printing station of the ink jet printer, the ink jet nozzle is still in the printing station, a material moves in the printing station of the ink jet printer, and ink drops are sprayed by the ink jet nozzle to form an image on the surface of the material.

When the ink jet nozzle is maintained, positive pressure is applied to the ink jet nozzle in a maintenance station of the ink jet printer, each jet hole in the ink jet nozzle is guaranteed to be in a smooth state, a scraper is arranged between the maintenance station and a printing station, the ink jet nozzle moves to the printing station from the maintenance station, the top end of the scraper can be in contact with the ink jet nozzle, cleaning of redundant ink drops on the ink jet nozzle is achieved by means of relative movement of the scraper and the ink jet nozzle, and the phenomenon that the redundant ink drops are condensed to block the ink jet nozzle is avoided.

However, after the ink jet head is used, ink remains on the surface of the ink jet head, and the ink and dust in the environment form condensation, which affects the ink scraping effect of the ink jet head of the next time.

SUMMERY OF THE UTILITY MODEL

The ink jet nozzle scraper aims to solve the problems that after the existing scraper is used, ink is remained on the surface of the scraper, the remained ink and dust in the environment form condensation, and the condensation influences the ink scraping effect of the next scraper on the ink jet nozzle.

According to an aspect of the embodiments of the present invention, there is provided a scraper device, including:

the accommodating groove is formed into a box-shaped structure with an open top;

the rotating assembly comprises a rotating shaft and a driving mechanism for driving the rotating shaft to rotate, the rotating shaft is horizontally arranged, and two ends of the rotating shaft respectively penetrate through the side walls on two opposite sides of the accommodating groove;

the scraper is positioned in the accommodating groove and is fixedly connected with the side wall of the rotating shaft;

the nozzle assembly comprises a nozzle and a connecting pipe, the nozzle is installed on the side wall of the containing groove, the jet hole of the nozzle faces the rotating shaft, the first end of the connecting pipe is connected with the nozzle, and the second end of the connecting pipe is used for being connected with a water supply mechanism.

In an alternative implementation manner, the number of the injection holes of the nozzle is multiple, and the multiple injection holes are arranged in a straight line, and the straight line is parallel to the axis of the rotating shaft.

In an alternative implementation manner, when the scraper rotates to be parallel to a horizontal plane, a straight line in which the plurality of injection holes are arranged is positioned on the same plane as the scraper, and the diameter of each injection hole is not smaller than the thickness of the scraper.

In an optional implementation, still include the three-way valve, the three-way valve with the outer wall fixed connection of holding tank, the export of three-way valve with the second end fastening connection of connecting pipe, the water inlet of three-way valve is used for connecting water supply mechanism, the air inlet of three-way valve is used for connecting air feed mechanism.

In an optional implementation manner, the system further comprises a controller, wherein the controller is connected with the three-way valve in a communication manner and is used for controlling the working state of the three-way valve.

In an optional implementation manner, the driving mechanism is a rotating cylinder, a main body of the rotating cylinder is located at the outer side of the accommodating groove, and an output shaft of the rotating cylinder is fixedly connected with the rotating shaft.

In an alternative embodiment, the rotary cylinder cover is provided with a cylinder cover, and the cylinder cover is fixedly connected with the side wall of the accommodating groove.

In an alternative implementation, the bottom wall of the accommodating groove is provided with a drain hole, and the drain hole is provided with a drain joint connected with a drain pipe.

In an alternative implementation manner, the scraper is a rubber scraper made of a rubber material, and the rubber scraper is mounted on the rotating shaft through a mounting seat.

According to another aspect of the embodiments of the present invention, there is provided an inkjet printer, including a mounting table, an inkjet head and the above-mentioned scraper device, wherein the inkjet head is capable of moving between a maintenance station and a printing station of the inkjet printer;

the scraper device is arranged between a maintenance station and a printing station of the ink-jet printer;

the ink jet nozzle is arranged on the bottom surface of the mounting table, and the mounting table can horizontally move along the axis direction perpendicular to the rotating shaft.

As can be appreciated by those skilled in the art, the doctor apparatus of the present invention includes a receiving tank, a rotating assembly, a doctor blade and a nozzle assembly. The holding tank forms open-top's box-like structure, and rotating assembly includes pivot and drive pivot pivoted actuating mechanism, and the pivot level sets up and both ends pass respectively the relative both sides lateral wall of holding tank. The scraper is located the inside of holding tank and with the lateral wall fixed connection of pivot. The nozzle assembly comprises a nozzle and a connecting pipe, the nozzle is installed on the side wall of the containing groove, the jet hole of the nozzle faces the rotating shaft, the first end of the connecting pipe is connected with the nozzle, and the second end of the connecting pipe is used for being connected with a water supply mechanism. Therefore, after the scraper is used, the driving mechanism in the rotating assembly drives the rotating shaft to rotate, and then the scraper is driven to rotate around the axis of the rotating shaft. When the scraper rotates to the position opposite to the nozzle assembly, water is sprayed from the spray hole of the nozzle assembly to clean the surface of the scraper, and then residual ink on the surface of the scraper is removed, so that the phenomenon that the dust of the ink on the surface of the scraper and the environment forms condensation and influences the ink scraping effect of the scraper on the ink jet nozzle is avoided.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.

Fig. 1 is a schematic structural diagram of a scraper device according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a cylinder cover of a scraper device provided in an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a nozzle assembly according to an embodiment of the present invention;

fig. 4 is a schematic structural view of a jet hole of a nozzle provided in an embodiment of the present invention;

fig. 5 is a schematic structural diagram of the scraper device according to the present invention after the accommodating groove is separated from the three-way valve.

Description of reference numerals:

1-accommodating a tank;

2-a rotating assembly;

21-a rotating shaft;

22-a drive mechanism;

3-a scraper;

31-a mounting seat;

4-a nozzle assembly;

41-a nozzle;

411-the jet orifice;

42-connecting pipe;

5-three-way valve;

51-an outlet;

52-water inlet;

53-air inlet;

6-a controller;

7-a cylinder cover;

8-water drainage joint.

Detailed Description

First of all, it should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention. And can be modified as needed by those skilled in the art to suit particular applications.

Next, it should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "inside", "outside", and the like are based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that a device or member must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present invention.

In the prior art, a positive pressure is applied to an inkjet head at a maintenance station of the inkjet head, that is, each jet hole of the inkjet head is caused to jet ink downward, thereby ensuring that each jet hole in the inkjet head is in a smooth state. After the ink jet head is maintained, ink drops can remain below the ink jet head, a scraper is arranged between a maintenance station and a printing station, the ink jet head moves to the printing station from the maintenance station, the top end of the scraper can be in contact with the ink jet head, and the ink drops remaining at the jet hole of the ink jet head are cleaned by the aid of relative movement of the scraper and the ink jet head. However, ink remains on the surface of the scraper after use, and the remaining ink and dust in the environment can form condensation, thereby affecting the ink scraping effect of the next scraper on the inkjet nozzle, and causing the phenomena of needle skewing and nozzle blockage in the printing process.

Through thinking repeatedly and verifying, the inventor finds that if can set up the nozzle on the scraper device, the scraper can both use the nozzle to spout washing liquid or pure water to the scraper surface after wiping at every turn, and then gets rid of the remaining ink in scraper surface, like this, when the scraper is next wiping, just can not have the condensation thing that ink and dust formed and influence the scraper to the wiping effect of wiping the ink shower nozzle because of the surface of scraper.

In view of the above, the present invention provides a scraper device, which includes a receiving groove, a rotating assembly, a scraper, and a nozzle assembly. The holding tank forms open-top's box-like structure, and rotating assembly includes pivot and drive pivot pivoted actuating mechanism, and the relative both sides lateral wall of holding tank is passed respectively at pivot level setting and both ends. The scraper is located the inside of holding tank and with the lateral wall fastening connection of pivot. The nozzle assembly comprises a nozzle and a connecting pipe, the nozzle is installed on the side wall of the containing groove, the jet hole of the nozzle faces the rotating shaft, the first end of the connecting pipe is connected with the nozzle, and the second end of the connecting pipe is used for being connected with a water supply mechanism. Like this, after the scraper is scraped the china ink at every turn, actuating mechanism drive pivot rotates and then drives scraper and pivot synchronous rotation, when the scraper rotated to the position that can be brushed by nozzle assembly spun water-washed, nozzle blowout water or washing liquid washed the surface of scraper to get rid of the remaining ink in scraper surface, guarantee the scraper to the wiping effect of inkjet shower nozzle.

Example one

Fig. 1 is a schematic structural diagram of a doctor apparatus provided in this embodiment. As shown in fig. 1, the doctor apparatus of the present embodiment includes a receiving groove 1, a rotating component 2, a doctor blade 3 and a nozzle component 4. Rotating assembly 2 and holding tank 1's lateral wall fixed connection, scraper 3 are located holding tank 1's inside and with rotating assembly 2 fixed connection. Holding tank 1 is open-top's box-shaped structure, and when scraper 3 rotated to the peak, the top of scraper 3 can stretch out and contact with the inkjet shower nozzle from box-shaped structure's top opening, and at inkjet shower nozzle and 3 relative movement's of scraper in-process, scraper 3 clears up the remaining ink droplet of inkjet shower nozzle, and the remaining ink droplet of inkjet shower nozzle can flow into the inside of holding tank 1 along the surface of scraper 3. The cross-sectional area and depth of the box-like structure are not limited in this embodiment, and those skilled in the art can set the cross-sectional area and depth according to actual needs.

Continuing to refer to fig. 1, rotating assembly 2 includes pivot 21 and drive pivot 21 pivoted actuating mechanism 22, and pivot 21 level sets up and both ends pass the relative both sides lateral wall of holding tank 1 respectively, and exemplarily, the both sides lateral wall is provided with the through-hole respectively around holding tank 1, imbeds the bearing in the through-hole, and pivot 21 passes through the bearing with holding tank 1 and is connected.

The driving mechanism 22 is located outside the accommodating groove 1 and is used for driving the rotating shaft 21 to rotate around the axis. The present embodiment is not limited to the specific structure of the drive mechanism 22 here, and for example, a stepping motor or a rotary air cylinder may be used as the drive mechanism 22.

Preferably, a rotating cylinder can be used as the driving mechanism 22, specifically, the main body of the rotating cylinder is located outside the holding tank 1, and exemplarily, the main body of the rotating cylinder is connected with the holding tank 1 by a cylinder fixing seat in a fastening manner, that is, one end of the cylinder fixing seat is connected with the other end of the outer side wall of the holding tank 1. The output shaft of the rotating cylinder is fixedly connected with the rotating shaft 21, for example, a coupler can be used to connect the output shaft of the rotating cylinder with the rotating shaft 21.

By configuring the driving mechanism 22 as a rotary cylinder, a person skilled in the art can control the rotation angle of the output shaft of the rotary cylinder by controlling the air inlet and the air outlet of the rotary cylinder, thereby conveniently controlling the rotation angle of the rotary shaft 21.

Fig. 2 is a schematic structural diagram of a cylinder cover of the doctor apparatus provided in this embodiment. As shown in fig. 1-2, the cylinder cover 7 is disposed outside the cylinder, and the cylinder cover 7 is fastened to the side wall of the receiving groove 1, and illustratively, the right end of the cylinder cover 7 and the outer side wall of the receiving groove 1 may be connected by screws.

The shape of the cylinder cover 7 is not limited in the present embodiment, and the structure of the cylinder cover 7 is, for example, a substantially strip-shaped structure, and the length direction of the strip-shaped structure is parallel to the axial direction of the output shaft of the rotating cylinder. Through set up cylinder hood 7 in the outside of revolving cylinder, play the effect of protection to revolving cylinder, avoid revolving cylinder and external environment to take place to collide with and cause the damage.

As shown in fig. 1, the scraper 3 is tightly connected with the portion of the rotating shaft 21 inside the accommodating groove 1. One possible implementation is that a rubber blade made of rubber material can be used as the scraper 3, so as to ensure that the scraper 3 has certain elasticity and lower hardness, and the ink jet head cannot be damaged. The number of the scrapers 3 is not limited in the present embodiment, and those skilled in the art can set the scrapers according to actual needs, for example, the number of the scrapers 3 can be two, and the two scrapers 3 are located on the same plane and are respectively fastened to the rotating shaft 21.

The scraper 3 is fastened and connected with the rotating shaft 21 through the mounting seat 31, illustratively, the mounting seat 31 includes a first connecting portion and a second connecting portion, one end of the first connecting portion is connected with the rotating shaft 21, the other end of the first connecting portion is detachably connected with the second connecting portion, for example, by a screw, a part of the scraper 3 is clamped between the first connecting portion and the second connecting portion, and then the fastening and connection of the scraper 3 and the rotating shaft 21 are realized.

As can be understood by those skilled in the art, by providing the mounting seat 31 to connect the scraper 3 and the rotating shaft 21, on one hand, the stability of the connection between the scraper 3 and the rotating shaft 21 is ensured; on the other hand, when the blade 3 is aged, the blade 3 can be replaced by opening the mount 31, i.e., separating the first connection portion from the second connection portion.

Fig. 3 is a schematic structural diagram of the nozzle assembly provided in this embodiment. As shown in fig. 1 and 3, the nozzle assembly 4 includes a nozzle 41 and a connection pipe 42, the nozzle 41 is mounted to a side wall of the receiving groove 1, illustratively, the side wall of the receiving groove 1 is provided with a mounting block, the receiving groove 1 and the mounting block are formed as a single piece, and the nozzle 41 and the mounting block are fixed to a top surface of the mounting block by a fastening member such as a screw.

That is, when the blade 3 is rotated to a fixed position by the rotation shaft 21, the liquid ejected from the ejection hole of the nozzle 41 can be flushed to the side surface of the blade 3, and the ink remaining on the side surface of the blade 3 can be flushed. It is easily understood that the liquid sprayed from the spray hole of the nozzle 41 may be pure water or detergent or other solvent. The following is given by way of example of water, but should not be construed as a specific limitation to the scope of protection, which can be set by a person skilled in the art according to the actual needs.

As shown in fig. 3, a first end of the connection pipe 42 is connected to the water inlet of the nozzle 41, and a second end, i.e., a lower end, of the connection pipe 42 is used to connect to a water supply mechanism. In fig. 3, the connection pipe 42 is an L-shaped bent pipe, and has a first end opening to the left in the drawing and a second end opening to the lower in the drawing. The water supply provided by the water supply mechanism can flow to the nozzle 41 via the connection pipe 42 and be ejected from the ejection hole of the nozzle 41.

In this embodiment, the doctor blade 3 is rotatable about the axis of the rotary shaft 21 in the housing tank 1 by providing the rotary member 2, the nozzle member 4 is attached to the side wall of the housing tank 1, and the injection hole of the nozzle 41 is provided toward the rotary shaft 21. Scraper 3 is after using, and actuating mechanism 22 among the rotating component 2 drives pivot 21 and rotates, and then drives scraper 3 and revolve the axis rotation of pivot 21, when scraper 3 rotatory to opposite with nozzle assembly 4 position, from nozzle assembly 4's jet orifice blowout water, wash 3 surfaces on the scraper, and then clear away the remaining ink on 3 surfaces on the scraper, avoid the ink to form the condensate at 3 surfaces of scraper and the dust in the environment, influence scraper 3 to the ink jet head scrape the china ink effect.

Fig. 4 is a schematic structural view of the nozzle provided in this embodiment at the injection hole. As shown in fig. 1 and 4, one possible implementation is that the number of the injection holes 411 of the nozzle 41 is plural, the plural injection holes 411 are arranged in a straight line, and the straight line in which the plural injection holes 411 are arranged is parallel to the axial direction of the rotating shaft 21. It is easily understood that the number of the injection holes 411 is not limited, and those skilled in the art can set it according to the width of the blade 3.

By arranging the spray holes 411 of the nozzles 41 to be straight lines parallel to the axis of the rotating shaft 21, that is, the water sprayed from the spray holes 411 of the nozzles 41 also falls on the surface of the scraper 3 to form a straight line parallel to the axis of the rotating shaft 21, the position of the straight line formed by the water on the surface of the scraper 3 can be adjusted by adjusting the rotating angle of the scraper 3, and the problem that the partial surface area of the scraper 3 is not cleaned or the cleaning is not completely cleaned in the process of cleaning the surface of the scraper 3 is avoided.

Preferably, when the scraper 3 rotates to be parallel to the horizontal plane, the plurality of injection holes 411 are aligned in a line which is in the same plane as the scraper 3, that is, the plurality of injection holes 411 are aligned in a line which is in the same plane as the axis of the rotating shaft 21. It is worth mentioning that the diameter of the injection hole 411 is not smaller than the thickness of the blade 3. When the scraper 3 rotates to be parallel to the horizontal plane, the water sprayed from the spray holes 411 can flow from the side of the scraper 3 away from the rotating shaft 21 to the side close to the rotating shaft 21, and the surface of the scraper 3 is cleaned.

By arranging the plurality of injection holes 411 in a straight line to be in the same plane as the rotary shaft 21, when the scraper 3 is cleaned, the surface of the scraper 3 can be cleaned by only rotating the scraper 3 to a horizontal state and controlling the water to be discharged from the injection holes 411 of the nozzle 41 without controlling the scraper 3 to rotate back and forth. The energy consumption in the cleaning process of the scraper 3 is reduced.

Fig. 5 is a schematic structural diagram of the scraper device provided in this embodiment after the accommodating groove is separated from the three-way valve. As shown in fig. 5, the scraper device provided in this embodiment further includes a three-way valve 5, the three-way valve 5 is fixedly connected to the outer wall of the accommodating tank 1, the position of the three-way valve 5 relative to the accommodating tank 1 is not limited in this embodiment, for example, the three-way valve 5 may be disposed below the accommodating tank 1, that is, the three-way valve 5 is fixedly connected to the bottom wall of the accommodating tank 1, and of course, a person skilled in the art may also dispose the three-way valve 5 to the side of the accommodating tank 1, that is, the three-way valve 5 is fixedly connected to the outer side wall of the accommodating tank 1.

The outlet 51 of the three-way valve 5 is tightly connected with the second end of the connecting pipe 42, and a water pump can be connected to the middle of the connecting pipe 42, the first end of the connecting pipe 42 is connected with the nozzle 41, and the water pump is used for driving the water to flow into the nozzle 41 from the three-way valve 5. The water inlet 52 of the three-way valve 5 is used for connecting with the water supply mechanism, and the air inlet 53 of the three-way valve 5 is used for connecting with the air supply mechanism, that is, the connecting pipe 42 can be controlled to be communicated with the water supply mechanism or the air supply mechanism by controlling the three-way valve 5.

The communication state between the control connection pipe 42 and the water supply mechanism or the air supply mechanism can be achieved by setting the three-way valve 5. Specifically, when cleaning the scraper 3, the three-way valve 5 may be controlled to communicate the connection pipe 42 with a water supply mechanism, which supplies water to the nozzle 41, so that the injection hole 411 of the nozzle 41 sprays water to clean the scraper 3; after cleaning scraper 3, can control three-way valve 5 and make connecting pipe 42 and air feed mechanism intercommunication, make the jet orifice 411 of shower nozzle jet gas and then weather the moisture on scraper 3 surface, compare in scraper 3 washs the back and dries naturally, can improve scraper 3's cleaning efficiency.

With continued reference to fig. 5, the present embodiment provides a doctor apparatus further comprising a controller 6, the controller 6 being located below the three-way valve 5 and being in communication with the three-way valve 5. The controller 6 is used to control the working state of the three-way valve 5, that is, a person skilled in the art can switch between spraying and spraying of the spraying holes 411 of the nozzle 41 by only operating the controller 6. The present embodiment is not limited to the structure of the controller, and for example, a PLC may be used as the controller.

As shown in fig. 5, the bottom wall of the accommodating groove 1 is further provided with a drain hole, and the drain hole is provided with a drain joint 8 connected with a drain pipe, and is exemplarily in interference fit with the drain joint 8. The structure of the drain connector 8 is not limited in this embodiment, and those skilled in the art can set the drain connector according to actual needs.

It is easy to understand that the water sprayed from the nozzle 41 cleans the scraper 3 and then flows into the accommodating tank 1, and during the process of scraping the ink by the scraper 3, the ink also flows into the accommodating tank 1 along the surface of the scraper 3. Through set up the wash port in the bottom of holding tank 1, the drain port is installed and is connected with the drainage joint 8 of drain pipe, can discharge the water and the ink that flow into holding tank 1 inside washing scraper 3 from holding tank 1, realizes the discharge of the water of ink and washing scraper 3.

Example two

On the basis of the first embodiment, the embodiment further provides an inkjet printer, which includes a mounting table, an inkjet head and the scraper device in the first embodiment, wherein the inkjet head can move between a maintenance station and a printing station of the inkjet printer. Specifically, the scraper device is installed between the maintenance station and the printing station of the ink-jet printer, the ink-jet nozzle is arranged on the bottom surface of the mounting table, and the mounting table can horizontally move along the axial direction perpendicular to the rotating shaft.

When the mounting platform moves above the scraper device, the top end of the scraper is in contact with the jet hole of the ink jet nozzle, and the cleaning of redundant ink drops on the nozzle is realized by utilizing the relative movement between the scraper and the ink jet nozzle.

The scraper device in this embodiment has the same structure as the scraper device provided in the first embodiment, and can bring about the same or similar technical effects, and details are not repeated herein, and specific reference may be made to the description of the above embodiment.

In the description of the present invention, it is to be understood that the terms "top," "bottom," "upper," "lower" (if present), and the like, are used in the orientation or positional relationship shown in the drawings for convenience in describing the present invention and to simplify the description, and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; 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 meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

The terms "first" and "second" in the description and claims of the present application and the description of the above-described figures are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims (10)

1. A doctor apparatus, characterized in that it comprises:

the accommodating groove is formed into a box-shaped structure with an open top;

the rotating assembly comprises a rotating shaft and a driving mechanism for driving the rotating shaft to rotate, the rotating shaft is horizontally arranged, and two ends of the rotating shaft respectively penetrate through the two opposite side walls of the accommodating groove;

the scraper is positioned in the accommodating groove and is fixedly connected with the side wall of the rotating shaft;

the nozzle assembly comprises a nozzle and a connecting pipe, the nozzle is installed on the side wall of the containing groove, the jet hole of the nozzle faces the rotating shaft, the first end of the connecting pipe is connected with the nozzle, and the second end of the connecting pipe is used for being connected with a water supply mechanism.

2. The doctor apparatus as claimed in claim 1, wherein the nozzle has a plurality of injection holes, and the plurality of injection holes are arranged in a line parallel to the axis of the rotary shaft.

3. The doctor apparatus according to claim 2, wherein when the doctor blade is rotated to be parallel to a horizontal plane, a plurality of the injection holes are aligned in a line in the same plane as the doctor blade, and the diameter of the injection holes is not smaller than the thickness of the doctor blade.

4. The scraper device according to any one of claims 1-3, further comprising a three-way valve, wherein the three-way valve is fixedly connected with the outer wall of the accommodating groove, an outlet of the three-way valve is fixedly connected with the second end of the connecting pipe, a water inlet of the three-way valve is used for connecting a water supply mechanism, and an air inlet of the three-way valve is used for connecting an air supply mechanism.

5. The doctor apparatus of claim 4, further comprising a controller communicatively coupled to the three-way valve for controlling an operational state of the three-way valve.

6. The doctor apparatus as claimed in any one of claims 1-3, wherein the driving mechanism is a rotary cylinder, a main body of the rotary cylinder is located outside the receiving groove, and an output shaft of the rotary cylinder is fixedly connected with the rotary shaft.

7. The doctor apparatus as claimed in claim 6, wherein the rotary cylinder cover is provided with a cylinder cover which is fixedly connected to the side walls of the receiving groove.

8. A scraper device according to any one of claims 1-3, characterized in that the bottom wall of the receiving groove is provided with a drainage hole, which is fitted with a drainage connection to a drainage pipe.

9. A scraper device according to any one of claims 1-3, characterized in that the scraper is a rubber blade made of rubber material, which is mounted to the shaft by means of a mounting.

10. An ink jet printer comprising a mounting station, an ink jet head and a doctor blade apparatus as claimed in any one of claims 1 to 9, the ink jet head being movable between a maintenance station and a printing station of the ink jet printer;

the scraper device is arranged between a maintenance station and a printing station of the ink-jet printer;

the ink jet nozzle is arranged on the bottom surface of the mounting table, and the mounting table can horizontally move along the axis direction perpendicular to the rotating shaft.

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