Jet printing headstock for vertical double-sided jet printing machine

Abstract

The utility model relates to the technical field of jet printing equipment, in particular to a jet printing headstock for a vertical double-sided jet printing machine, which comprises a headstock body, the headstock body is provided with a plurality of groups of nozzle assemblies, an air bottle and an ink bottle, and the nozzle assemblies are uniformly arranged at intervals along the height direction of the headstock body; each group of spray head assembly comprises a plurality of printing ink spray heads which are uniformly arranged at intervals in the length direction of the vehicle head body, the number of the air bottles is the same as that of the spray head assemblies, and one air bottle correspondingly controls the negative pressure of all the printing ink spray heads in one group of spray head assembly. The air bottles with the same number are arranged on the basis of the arrangement number of the nozzle assemblies, so that one air bottle correspondingly controls all the ink nozzles in one group of nozzle assemblies to keep the same and stable negative pressure, that is, ink is supplied to the ink nozzles at different heights through different negative pressures; therefore, it is ensured that all the ink nozzles on the vehicle head body keep the same ink supply rate.

Description

Technical Field

[0001] The present application relates to the technical field of inkjet printing equipment, and in particular to an inkjet printing head for a vertical double-sided inkjet printer. Background Art

[0002] Currently, in the technology of double-sided inkjet printers, horizontal double-sided inkjet printers are mainly used in the market. Horizontal double-sided inkjet printing means that the material moves in the horizontal direction, and the inkjet printing head reciprocates in the horizontal direction to inkjet print both sides of the material. In the inkjet printing head of a horizontal double-sided inkjet printer, usually multiple nozzles are provided, and the ink inlets and outlets of the multiple nozzles are located in the same horizontal plane. Therefore, the ink supply to the multiple nozzles can be achieved through one air bottle, that is, by maintaining a stable negative pressure in the ink bottle through the air bottle, so that the ink in the ink bottle continuously and synchronously fills into the multiple nozzles, and finally is ejected from the multiple nozzles to realize the inkjet printing process.

[0003] However, in actual use, since the material of the above-mentioned horizontal double-sided inkjet printer moves in the horizontal direction, the overall floor area of the equipment is large. To save floor area and improve space utilization rate, vertical double-sided inkjet printers have gradually become the mainstream inkjet printing method. Vertical double-sided inkjet printing means that the material moves from top to bottom or from bottom to top. Two inkjet printing heads are respectively arranged on the left and right of the material to reciprocate horizontally and synchronously inkjet print patterns on both sides of the material. For the inkjet printing head in the above-mentioned vertical double-sided inkjet printer, when the material moves along the vertical direction, multiple ink bottles are usually arranged in the same horizontal plane, and multiple nozzles need to be distributed at different positions in the vertical direction to complete the inkjet printing of the material.

[0004] However, it is found in actual application that under the influence of gravity, due to the height difference between the liquid levels of the ink inlets of the nozzles at different height positions and the ink bottles at the same height, to ensure the same ink replenishment efficiency while replenishing ink into the nozzles at different heights, the pressure required for the nozzles located above is greater than that required for the nozzles located below. At this time, if the ink supply method used for the nozzles in the above-mentioned horizontal double-sided inkjet printer, that is, the method of synchronously supplying ink to multiple nozzles through one air bottle, is adopted, since the negative pressure in all the ink bottles connected by one air bottle is the same, and the heights of the ink inlets of the nozzles located above and the nozzles located below are different, it is easy to have the problem that the ink supply speed in the nozzles located above is slower and the ink supply speed in the nozzles located below is faster under the same negative pressure. The different ink replenishment efficiencies of the multiple nozzles arranged on one inkjet printing head directly affect the inkjet printing quality of this inkjet printing head, thus resulting in a reduction in the overall inkjet printing quality and being not conducive to use. Summary of the Utility Model

[0005] In order to achieve the purpose of ensuring that the ink replenishment rates of nozzles at different heights are the same in the printing head of a vertical double-sided printer, so as to ensure the printing quality of the printing head, the present application provides a printing head for a vertical double-sided printer.

[0006] The printing head for a vertical double-sided printer provided by the present application adopts the following technical solutions:

[0007] A printing head for a vertical double-sided printer includes a head body. A nozzle assembly, an air bottle, and an ink bottle are arranged on the head body. A plurality of groups of nozzle assemblies are evenly spaced along the height direction of the head body. Each group of nozzle assemblies includes a plurality of ink nozzles evenly arranged along the length direction of the head body. The number of air bottles is the same as the number of nozzle assemblies, and one air bottle controls the negative pressure of all ink nozzles in one group of nozzle assemblies.

[0008] For a vertical printer, due to the liquid level differences at different vertical distances between multiple ink nozzles on a printing head and the ink bottle, if it is necessary to ensure that all ink nozzles on a printing head have the same ink replenishment or ink output rate, the negative pressures required by the ink nozzles at different height positions are different. By adopting the above technical solutions, since several ink nozzles within the same group of nozzle assemblies are at the same horizontal plane, the liquid level difference distances between several ink nozzles within the same group of nozzle assemblies and the ink bottle are the same. That is, based on the number of nozzle assemblies, the same number of air bottles can be correspondingly set. Thus, one air bottle controls all ink nozzles within one group of nozzle assemblies to maintain the same negative pressure, and the negative pressures between different air bottles are different. Through the combined cooperation of several air bottles, it is ensured that all ink nozzles on a printing head maintain a stable and the same ink replenishment or ink output rate, thereby ensuring the printing quality of the printing head.

[0009] Preferably, the head body includes a housing for connecting the printer, a sliding seat slid on the housing, a mounting plate fixed on the sliding seat, and a driving component for driving the sliding seat to slide along the width direction of the housing. An installation cavity is penetrated through the housing. The sliding seat, the mounting plate, and the driving component are all arranged in the installation cavity. A plurality of installation holes for passing through the ink nozzles are opened on the mounting plate. The plurality of installation holes are arranged in one-to-one correspondence with the plurality of ink nozzles. An adjusting structure for adjusting the installation position of the ink nozzles is arranged on the mounting plate. The air bottle and the ink bottle are both installed on the housing.

[0010] By adopting the above technical solution, during use, the installation position of the inkjet head on the mounting plate is adjusted through the adjusting component. After the adjustment is completed, the sliding seat is driven to slide through the driving component, so as to adjust the position of the inkjet head on the outer housing, so as to ensure the distance between the ink outlet on the inkjet head and the material surface when the inkjet head is installed on the vehicle head body, thereby ensuring the quality of inkjet printing of the inkjet head.

[0011] Preferably, the driving component includes a lead screw rotatably arranged on the outer housing, a sliding sleeve threadedly connected to the lead screw, and a rotating handwheel coaxially fixed to the end of the lead screw, and the sliding sleeve is fixedly connected to the sliding seat.

[0012] By adopting the above technical solution, during use, the staff rotates the rotating handwheel to drive the lead screw to rotate. The rotation of the lead screw synchronously drives the sliding sleeve to slide, thereby driving the sliding seat to slide. The use process is simple and convenient.

[0013] Preferably, the adjusting structure includes a limiting rod arranged on the mounting plate, a fixing block fixedly connected to the mounting plate, and a contact elastic sheet fixed to the fixing block. There are two limiting rods, and the two limiting rods are respectively located on both sides of the inkjet head. A first limiting groove is formed at one end of the inkjet head, and a second limiting groove is formed at the other end of the inkjet head. One of the limiting rods is in contact and cooperation with the inner wall of the first limiting groove, and the other limiting rod is in contact with the second limiting groove. A guiding inclined surface is formed at one end of the inkjet head, and the contact elastic sheet is in contact and cooperation with the guiding inclined surface.

[0014] By adopting the above technical solution, during use, after the inkjet head is inserted into the corresponding mounting hole, the two limiting rods can be respectively inserted into the first limiting groove and the second limiting groove, and the side walls of the two limiting rods are respectively in contact with the inner walls of the first limiting groove and the second limiting groove, and then combined with the contact elastic sheet abutting against the abutting inclined surface of the inkjet head, so as to realize the positioning of the installation position of the inkjet head.

[0015] Preferably, the limiting rod includes a plug rod fixed on the mounting plate, a contact sleeve slidably inserted on the plug rod, a return spring arranged between the contact sleeve and the plug rod, and an adjusting column arranged on the plug rod. One end of the plug rod passes through the contact sleeve and is threadedly connected to the adjusting column. The return spring is sleeved on the plug rod, and one end of the return spring abuts against the side wall of the plug rod, and the other end of the return spring abuts against the inner wall of the contact sleeve. An abutting inclined surface for abutting and limiting the inkjet head is formed on the outer wall of the contact sleeve.

[0016] By adopting the above technical solution, during use, through the combined use of the adjusting column, the inserting rod, the abutting sleeve and the return spring, that is, by adjusting the abutting positions of the ink nozzle and different positions of the abutting inclined surface on the abutting sleeve, the adjustment of the position of the installed ink nozzle is realized. During the adjustment process, through the abutting elastic piece, it is ensured that the inner walls of the first limiting groove and the second limiting groove on the ink nozzle are always tightly abutted against the abutting inclined surface.

[0017] Preferably, a cross-shaped adjusting groove is further formed at one end of the adjusting column away from the inserting rod.

[0018] By adopting the above technical solution, through the setting of the cross-shaped adjusting groove, it is more convenient for the staff to rotate the adjusting column, and thus it is beneficial to adjust the position of the abutting sleeve.

[0019] Preferably, a negative pressure gauge is further arranged on the head body, and the number of the negative pressure gauges is the same as the number of the nozzle assemblies. One group of the negative pressure gauges is used to monitor the negative pressure in the ink bottle connected to the corresponding group of nozzle assemblies.

[0020] By adopting the above technical solution, during use, by setting the negative pressure gauges with the same number as the nozzle assemblies, the negative pressure in the ink nozzles at different height positions is monitored respectively, which is more convenient for the staff to observe the negative pressure in the ink bottle in real time, so as to adjust in time.

[0021] Preferably, a protective shell is further fixed on the head body, and the protective shell covers the air bottle and the ink bottle.

[0022] By adopting the above technical solution, during use, by setting the protective shell, during the use of the printing head, the ink nozzles and their ink supply pipelines in the printing head are protected and shielded, so as to reduce the influence of external objects on the work of the ink nozzles in the printing head.

[0023] To sum up, the present application includes at least one of the following beneficial technical effects:

[0024] 1. During use, by setting a plurality of air bottles, each air bottle can be used to correspondingly control all the ink nozzles in a group of nozzle assemblies to maintain the same negative pressure, and the negative pressures between the plurality of air bottles are different from each other, so as to ensure that the ink nozzles at different height positions can also maintain the same negative pressure, thereby achieving the purpose of ensuring that the ink inlet or outlet rates of all the ink nozzles on a printing head are the same, and further ensuring the printing quality of the printing head;

[0025] 2. During use, the ink nozzle is installed on the mounting plate, and thus the position of the mounting plate is adjusted through the driving assembly to control the distance between the ink nozzle and the material, further ensuring the printing quality of the printing head.

[0026] 3. Through the combined use of two groups of limiting rods and a contact elastic sheet, the adjustment of the installation position of the ink nozzle is achieved, and at the same time, the installation stability of the ink nozzle is ensured, which is more conducive to use. Description of the Drawings

[0027] Figure 1 is an axonometric schematic diagram mainly showing the overall structure in the embodiment of the present application;

[0028] Figure 2 is an exploded view mainly showing the overall structure in the embodiment of the present application;

[0029] Figure 3 is an axonometric schematic diagram mainly showing the structure of the driving component in the embodiment of the present application;

[0030] Figure 4 is an axonometric schematic diagram mainly showing the distribution structure of the ink nozzles in the embodiment of the present application;

[0031] Figure 5 is an exploded view mainly showing the adjustment structure in the embodiment of the present application;

[0032] Figure 6 is a sectional view mainly showing the structure of the limiting rod in the embodiment of the present application.

[0033] Reference Signs: 1, vehicle head body; 11, outer shell; 12, sliding seat; 13, mounting plate; 14, driving component; 141, lead screw; 142, sliding sleeve; 143, rotating handwheel; 144, driving motor; 15, mounting hole; 2, nozzle component; 21, ink nozzle; 22, first limiting groove; 23, second limiting groove; 24, guide inclined surface; 3, air cylinder; 4, ink bottle; 5, adjustment structure; 51, limiting rod; 511, inserting rod; 512, contact sleeve; 513, return spring; 514, adjustment column; 515, contact inclined surface; 516, cross adjustment groove; 52, fixing block; 53, contact elastic sheet; 6, negative pressure gauge; 7, protective shell. Detailed Embodiments

[0034] The following Figure 1 - Figure 6 further describes the present application in detail with reference to the

[0035] The embodiment of the present application discloses a printing vehicle head for a vertical double-sided printer.

[0036] Refer to Figure 1 and Figure 2, An inkjet head for a vertical double-sided inkjet printer, including a horizontally arranged head body 1. The head body 1 is composed of an outer shell 11, a sliding seat 12, a mounting plate 13, and a driving component 14. Among them, the outer shell 11 is used to connect to the inkjet printer. An installation cavity is formed on the outer shell 11. The sliding seat 12 is slidably connected to the inner wall of the installation cavity along the width direction of the outer shell 11. The mounting plate 13 is fixed to one end of the sliding seat 12 by bolts. The mounting plate 13 is perpendicular to the sliding seat 12 and is located at the open end on one side of the installation cavity.

[0037] Refer to Figure 2 and Figure 3 , The driving component 14 is used to drive the sliding seat 12 to slide. The driving component 14 is composed of a lead screw 141, a sliding sleeve 142, and a rotating handwheel 143. The lead screw 141 is rotatably connected to the bottom wall of the installation cavity. The sliding sleeve 142 is threadedly connected to the lead screw 141, and the sliding seat 12 is fixed to the bottom wall of the sliding seat 12 by bolts. The rotating handwheel 143 is located at one end of the installation cavity away from the mounting plate 13, and the rotating handwheel 143 is coaxially fixed to the end of the lead screw 141. During use, the staff rotates the rotating handwheel 143 to drive the lead screw 141 to rotate, thereby driving the sliding seat 12 to slide.

[0038] Refer to Figure 2 and Figure 3 , In this application, a driving motor 144 can also be installed between the rotating handwheel 143 and the lead screw 141. In this embodiment, the driving motor 144 is preferably set as a two-axis stepper motor, that is, the driving motor 144 is installed on the inner wall of the installation cavity by bolts, and the two output shafts of the driving motor 144 are coaxially fixedly connected to the lead screw 141 and the rotating handwheel 143 respectively through couplings. Thus, during normal use, the lead screw 141 is driven to rotate by the driving motor 144. When in a power-off or unpowered state, the lead screw 141 is driven to rotate by manually rotating the rotating handwheel 143, and the overall adjustment process is more convenient.

[0039] Refer to Figure 2 and Figure 4 , A plurality of groups of nozzle assemblies 2 are arranged at equal intervals in the vertical direction on the mounting plate 13. Each group of nozzle assemblies 2 is composed of a plurality of ink nozzles 21 evenly distributed along the length direction of the mounting plate 13. In this embodiment, the nozzle assembly 2 is preferably set as three groups, and each group of nozzle assemblies 2 includes six ink nozzles 21. Mounting holes 15 for embedding the ink nozzles 21 are formed on the mounting plate 13. The number of the mounting holes 15 is the same as the number of the ink nozzles 21 and they are arranged in one-to-one correspondence. In this embodiment, the ink nozzles 21 in different groups of nozzle assemblies 2 are crosswise and staggeredly distributed on the mounting plate 13. An adjusting structure 5 is also arranged on the mounting plate 13. The adjusting structure 5 is used to adjust the position of the ink nozzles 21 installed in the mounting holes 15.

[0040] Refer toFigure 4 and Figure 5 The adjusting structure 5 is composed of a limiting rod 51, a fixing block 52 and an abutting elastic sheet 53. There are two limiting rods 51, and both of the two limiting rods 51 are threadedly connected to the mounting plate 13. A first limiting groove 22 is formed at the top end of the inkjet head 21. In this embodiment, the first limiting groove 22 is a V-shaped groove. A second limiting groove 23 is formed at the left side of the bottom end of the inkjet head 21. The side wall of one of the limiting rods 51 abuts and cooperates with the inner wall of the first limiting groove 22, and the side wall of the other limiting rod 51 abuts and cooperates with the inner wall of the second limiting groove 23. A guiding inclined surface 24 is integrally formed at the right side of the bottom end of the inkjet head 21. The fixing block 52 is fixedly connected to the lower right side of the mounting hole 15 by bolts. The abutting elastic sheet 53 is fixed to the fixing block 52 by bolts, and the end of the abutting elastic sheet 53 away from the fixing block 52 abuts and cooperates with the guiding inclined surface 24. In this embodiment, the abutting elastic sheet 53 is preferably arranged as an elastic spring sheet.

[0041] Refer to Figure 5 and Figure 6 Refer to

[0042] Refer to Figure 5 and Figure 6, during use, first insert the ink nozzle 21 into the mounting hole 15. Then, connect the two insertion rods 511 to the mounting plate 13 corresponding to the first limiting groove 22 and the second limiting groove 23 respectively, and form a preliminary limit by abutting the elastic sheet 53 against the guide inclined surface 24, so as to ensure the abutting force between the ink nozzle 21 and the limiting rod 51. After that, a tool with a corresponding shape can be inserted into the cross adjustment groove 516, and then by rotating the adjustment column 514 forward, the adjustment column 514 slides towards the direction close to the insertion rod 511. Under the abutting action of the adjustment column 514, the abutting sleeve 512 slides synchronously towards the direction close to the insertion rod 511. At this time, under the abutting and limiting action of the abutting inclined surface 515 outside the abutting sleeve 512, the position adjustment of the ink nozzle 21 can be realized. At the same time, in cooperation with the elastic force of the abutting elastic sheet 53, the ink nozzle 21 is also clamped, thus increasing the fixing stability of the ink nozzle 21.

[0043] Refer to Figure 5 and Figure 6 , when both limiting rods 51 are installed on the mounting plate 13 through the above operations, the ink nozzle 21 can be fixed in the mounting hole 15 by the abutting and limiting of the abutting inclined surface 515 in the two limiting rods 51; when the position of the ink nozzle 21 needs to be adjusted, only need to rotate the adjustment column 514 reversely. Under the elastic force of the return spring 513, the abutting sleeve 512 slides synchronously with the adjustment column 514 towards the direction away from the insertion rod 511, so that the abutting inclined surface 515 on the abutting sleeve 512 is separated from the ink nozzle 21, and then the position adjustment of the ink nozzle 21 can be carried out. The whole use process is simple and convenient.

[0044] Refer to Figure 2 , an air bottle 3 and an ink bottle 4 are also provided on the outer shell 11. Among them, the number of air bottles 3 is the same as the number of nozzle assemblies 2. In this embodiment, the nozzle assembly 2 is set to three groups, so three air bottles 3 are also provided, and each air bottle 3 controls the negative pressure in several ink nozzles 21 in one group of nozzle assemblies 2 to be stable. The number of ink bottles 4 depends on the number of colors to be printed by the printer, that is, several groups of ink bottles 4 need to be set according to the number of colors the printer needs to print on the material; at the same time, in order to facilitate the staff to observe the negative pressure value in the ink bottle 4, a negative pressure gauge 6 is also installed on the outer shell 11, and the number of negative pressure gauges 6 is the same as the number of air bottles 3, that is, each negative pressure gauge 6 is used to monitor the negative pressure value in the ink bottle 4 controlled by one air bottle 3.

[0045] Refer to Figure 1 and Figure 2, during use, the negative pressure tank, negative pressure pump, and negative pressure control board are correspondingly installed on the inkjet printer. Then, the negative pressure storage tank, negative pressure pump, air bottle 3, and ink bottle 4 are interconnected through air ducts, so as to ensure a stable negative pressure in the ink bottle 4 through the air bottle 3, thereby sucking the ink in the ink bottle 4. After that, through the cooperation of the ink bottle 4 and the air bottle 3, the end of continuously supplying ink to the ink nozzle 21 can be achieved. During the ink supply process, the staff can judge the negative pressure values of all the ink nozzles 21 in the corresponding nozzle assembly 2 by observing the reading of the negative pressure gauge 6, so as to facilitate the staff to adjust the negative pressure of all the ink nozzles 21, and then assist the staff to adjust the ink inlet or outlet rates of the ink nozzles 21 at different height positions to be consistent.

[0046] Refer to Figure 1 and Figure 2 , in practical applications, in order to ensure the normal use of the inkjet print head, that is, to reduce the influence of external objects on the structure of the ink nozzle 21 installed on the inkjet print head, a protective shell 7 is also fixed on the outer shell 11 by bolts. The protective shell 7 covers the air bottle 3, the ink bottle 4, and the nozzle assembly 2 inside the outer shell 11.

[0047] The implementation principle of the embodiment of the present application is as follows: during use, first, a plurality of ink nozzles 21 are installed on the mounting plate 13 one by one through the adjusting structure 5. Then, the mounting plate 13 is driven to slide by the driving assembly 14 to adjust the distance between the ink nozzle 21 and the material. After that, the inkjet print head can be started to print on the material. During the printing process, the negative pressure values of the ink nozzles 21 in the three nozzle assemblies 2 are respectively controlled by three air pumps, so as to adjust the negative pressure values of the corresponding air pumps according to the height positions of the ink nozzles 21, thereby ensuring that the ink supply or outlet rates of the ink nozzles 21 at different heights are always consistent and stable, thus ensuring the overall printing quality of the inkjet print head and being more conducive to the application in a vertical inkjet printer.

[0048] The above are all the preferred embodiments of the present application, and the protection scope of the present application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A printing head for a vertical double-sided inkjet printer, characterized in that: The invention comprises a vehicle head body (1), on which a nozzle assembly (2), an air bottle (3) and an ink bottle (4) are arranged, wherein the nozzle assembly (2) is arranged in a plurality of groups at even intervals along the height direction of the vehicle head body (1), and each group of the nozzle assembly (2) comprises a plurality of ink nozzles (21) arranged at even intervals along the length direction of the vehicle head body (1), the number of the air bottles (3) being arranged is the same as the number of the nozzle assemblies (2), and one air bottle (3) is used to control the negative pressure of all the ink nozzles (21) in a group of nozzle assemblies (2).

2. The printing head for a vertical double-sided inkjet printer according to claim 1, characterized in that: The vehicle head body (1) comprises an outer shell (11) for connecting to a jet printer, a sliding seat (12) sliding on the outer shell (11), a mounting plate (13) fixed on the sliding seat (12), and a driving assembly (14) for driving the sliding seat (12) to slide along the width direction of the outer shell (11); a mounting cavity is provided through the outer shell (11); the sliding seat (12), the mounting plate (13) and the driving assembly (14) are all arranged in the mounting cavity; a plurality of mounting holes (15) for inserting ink nozzles (21) are provided on the mounting plate (13); the plurality of mounting holes (15) are arranged in a one-to-one correspondence with the plurality of ink nozzles (21); an adjusting structure (5) for adjusting the installation position of the ink nozzles (21) is provided on the mounting plate (13); and the air bottle (3) and the ink bottle (4) are both installed on the outer shell (11).

3. The printing head for a vertical double-sided inkjet printer according to claim 2, characterized in that: The driving assembly (14) comprises a screw rod (141) rotating on the outer shell (11), a sliding sleeve (142) threadedly connected to the screw rod (141), and a rotating hand wheel (143) coaxially fixed to the end of the screw rod (141), and the sliding sleeve (142) is fixedly connected to the sliding seat (12).

4. The printing head for a vertical double-sided inkjet printer according to claim 2, characterized in that: The adjustment structure (5) comprises a limiting rod (51) arranged on the mounting plate (13), a fixing block (52) fixedly connected to the mounting plate (13), and an abutting spring sheet (53) fixed to the fixing block (52); two limiting rods (51) are provided, and the two limiting rods (51) are respectively located on both sides of the ink nozzle (21); a first limiting groove (22) is provided at one end of the ink nozzle (21), and a second limiting groove (23) is provided at the other end of the ink nozzle (21); one of the limiting rods (51) abuts against the inner wall of the first limiting groove (22), and the other limiting rod (51) abuts against the second limiting groove (23); a guiding inclined surface (24) is formed at one end of the ink nozzle (21), and the abutting spring sheet (53) abuts against the guiding inclined surface (24).

5. The printing head for a vertical double-sided inkjet printer according to claim 4, characterized in that: The limiting rod (51) comprises an insert rod (511) fixed on the mounting plate (13), an abutting sleeve (512) slidably inserted on the insert rod (511), a return spring (513) arranged between the abutting sleeve (512) and the insert rod (511), and an adjusting column (514) arranged on the insert rod (511); one end of the insert rod (511) passes through the abutting sleeve (512) and is threadedly connected to the adjusting column (514); the return spring (513) is sleeved on the insert rod (511), and one end of the return spring (513) abuts against the side wall of the insert rod (511), and the other end of the return spring (513) abuts against the inner wall of the abutting sleeve (512); and the outer wall of the abutting sleeve (512) is formed with an abutting inclined surface (515) for abutting against the limiting ink nozzle (21).

6. The printing head for a vertical double-sided inkjet printer according to claim 5, characterized in that: The end of the adjustment column (514) away from the insertion rod (511) is also provided with a cross adjustment groove (516).

7. The printing head for a vertical double-sided inkjet printer according to claim 1, characterized in that: A negative pressure gauge (6) is also provided on the vehicle head body (1), and the number of the negative pressure gauges (6) is the same as the number of the nozzle assemblies (2). A group of the negative pressure gauges (6) is used to monitor the negative pressure in the ink bottle (4) connected to the corresponding group of nozzle assemblies (2).

8. The printing head for a vertical double-sided inkjet printer according to claim 1, characterized in that: A protective shell (7) is also fixed on the vehicle head body (1), and the protective shell (7) is arranged outside the air bottle (3) and the ink bottle (4).

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