CN220429684U - Multi-PASS ink-jet printer - Google Patents

Abstract

The utility model relates to the field of large-format inkjet printing, in particular to a multi-PASS inkjet printer which is arranged above a printing platform and comprises two subframes distributed along the X direction, a cantilever beam connected below the subframes and a cleaning maintenance assembly, wherein the subframes and the cantilever beam form a buffer space, a printing inkjet space and an operation space, the cleaning maintenance assembly is arranged in the operation space, the cantilever beam comprises one group of spray heads, and the inkjet vehicle comprises a plurality of groups of jack shifting inkjet for realizing the position exchange of the spray heads A and the spray heads B. The support structure is used for solving the problems that the stability of the support structure is insufficient, the occupied space of the maintenance part is large, the installation is complex, the service life of the ink-jet printer is short, and the use cost is high. The stability of the reinforced frame is realized, and the manufacturing and the installation are simple and portable; the bending strength of the cantilever beam is increased; the service efficiency of the spray head is improved, the service life of the spray head is prolonged, and the utilization rate of the whole space of the printer is improved.

Description

Multi-PASS ink-jet printer

Technical Field

The utility model relates to the field of large-format inkjet printing, in particular to a multi-PASS inkjet printer.

Background

Conventional digital inkjet printing or digital inkjet printing can be divided into two main categories by the manner in which it works: scanning (multi-pass) and single pass (single-pass/one-pass). The scanning printing mode is that a printing object is fixed, and image output is realized by moving a printing head; the single-program printing mode is that the printing head is fixed, and the image output is realized by moving the printing stock. In the jet printing industry, the number of times the PASS value screen is required to be printed, namely the number of times of masking per unit area, and the higher the PASS number, the slower the printing speed, the better the printing quality, and the PASS number and the printing precision are related. The advantage of multiple PASS scan printing is that errors that may occur during one scan of the nozzle are covered by the next scan, and the more the number of scans, the more likely that errors that occur during a single print will be masked.

In the prior art, the number of PASS is increased or the number of nozzles is increased in the direction of improving the printing precision, and the increase of the number of PASS brings the defect of obviously reducing the printing speed and is unfavorable for improving the production efficiency. The problem with increasing the number of nozzles is a significant increase in printer costs, which is detrimental to control of production costs.

How can solve many PASS inkjet printer print time long, efficiency is not enough, the printing cost is higher, the problem that the picture and text resolution ratio of printing out is not enough, the inkjet car is because the distribution of force is not even enough when scanning repeatedly and remove leads to the great problem of wearing and tearing to bearing structure, simultaneously, this bearing structure not only needs to solve structural stability's problem, still need provide a space enough, simple to operate's space for the inkjet car, how can improve through maintaining the shower nozzle in order to prolong inkjet printer's life, and avoid maintaining the installation complicacy of part, occupation space is too big, all be the technical problem that the field needs to solve.

Disclosure of Invention

The present utility model aims to overcome at least one of the above-mentioned drawbacks (shortcomings) of the prior art, and provides a multiple PASS inkjet printer, which is used for providing an inkjet vehicle with insufficient stability of a supporting structure, insufficient simplicity in installation, and large occupied space and complex installation of maintenance components, so that the problem of short service life and high use cost of the inkjet printer cannot be solved.

The technical scheme adopted by the utility model is that the multi-PASS ink-jet printer is arranged above a printing platform, and comprises more than two subframes distributed along the X direction, a cantilever beam connected below the subframes and a cleaning maintenance assembly, wherein the subframes are door-shaped supporting frames, each subframe comprises two upright posts and a supporting beam connected to the top ends of the two upright posts, the upright posts and the cantilever beam form a first frame surface in the X direction, the upright posts and the supporting beams form a second frame surface in the Y direction, and the distance d1 between the two subframes is equal to the distance d1 between the two subframes on the first frame surface: the ratio of the length D of the cantilever beam is 1/2, and the distance between the subframe and the end part D2 of the cantilever beam is as follows: the ratio of the length D of the cantilever beam is 1/4, the subframe and the cantilever beam form a buffer space, a printing spray painting space and an operation space, the cleaning maintenance assembly is arranged in the operation space, the cantilever beam comprises one cantilever beam, the cantilever beam supports the inkjet vehicle to slide on the cantilever beam through a suspension structure, the inkjet vehicle comprises a plurality of groups of spray heads, each group of spray heads comprises a plurality of spray heads which are arranged in the Y direction and have the same color, the spray heads are arranged into a plurality of rows in the X direction, the spray heads A and the spray heads B are arranged in any two rows, and jack shifting inkjet with position interchange of the spray heads A and the spray heads B is realized.

The support force is better stabilized for the cantilever beam through the subframe, so that the whole structure of the printer is more stable during multi-PASS reciprocating printing, and the influence of shaking of the inkjet vehicle on the accuracy is avoided; the suspension beam and the suspension structure are beneficial to limiting the sliding track of the inkjet vehicle and driving the sliding direction of the inkjet vehicle, so that the displacement of the inkjet vehicle is accurately controlled; the cleaning maintenance assembly is favorable for cleaning, moisturizing, replacing the moisturizing assembly and other routine nozzle maintenance work for the nozzle in the inkjet vehicle, so that the inkjet printing effect of the nozzle is enhanced, and the service life of the inkjet vehicle is prolonged.

Further, the spray head A and the spray head B are adjacently arranged.

The ink jet vehicle is favorable for simultaneously jetting ink when the ink jet vehicle shifts through two adjacent groups of nozzles, so that the color difference generated on a printing medium due to the change of the nozzle height, the nozzle voltage and the temperature difference of the ink jet is covered by the adjacent groups of nozzles, and the printing precision and the printing effect are improved.

Further, the C nozzle is a row different from the A nozzle or the B nozzle, and the ink-jet vehicle in the step 3 realizes the exchange of any two rows of positions of the A nozzle, the B nozzle and the C nozzle along the Y-axis direction according to the displacement distance P.

The method is beneficial to alternately jetting ink when the inkjet vehicle is shifted through the plurality of groups of nozzles, so that the color difference coverage range of the plurality of groups of nozzles is further enlarged compared with that of the adjacent groups of nozzles, thereby avoiding the obvious color difference boundary generated after the two groups of nozzles are fixed for color difference coverage and further improving the printing effect.

Further, the ink jet width I of the ink jet vehicle on the Y axis is at least one L more than the width H of the printing medium.

The spray head can cover the corner position of the printing medium in the printing process, and the ink-jet covering force of the scanning printer is increased.

Further, the cantilever beam is of a rectangular beam structure, the rectangular beam is formed by splicing at least two rectangular sub-beams with the same length direction, the rectangular sub-beams are hollow beams, transverse supports and longitudinal supports are arranged in the rectangular sub-beams, and the width direction of the rectangular sub-beams is not greater than the height direction of the rectangular sub-beams.

The two rectangular sub-beams are spliced, so that the strength of the rectangular beam is enhanced, and the installation of the rectangular beam structure is simplified; the rectangular beam is beneficial to being manufactured through the existing hollow beam, so that the manufacturing cost of the cantilever beam is reduced; the rectangular sub-beam is beneficial to uniformly guiding and distributing stress on the rectangular sub-beam to the whole rectangular beam structure through transverse support and longitudinal support penetrating through the whole hollow beam, and the service life of the rectangular beam is prevented from being influenced by excessively concentrated stress.

Further, the suspension structure comprises a driving device, wherein the driving device and the inkjet vehicle are linear motors in the connection direction of an X axis and a Y axis, and the driving device and the inkjet vehicle are screw rods in the connection direction of a Z axis.

The linear motor is beneficial to driving the inkjet vehicle to move in the X-axis direction and the Y-axis direction, and the linear motor is beneficial to improving the accuracy of the control of the movement displacement of the inkjet vehicle, so that the jack displacement multi-PASS scanning printing effect of the inkjet vehicle on a printing medium is realized; the device is beneficial to the movement of the ink-jet vehicle in the Z-axis direction through the screw rod drive, and the accuracy of displacement control of the ink-jet vehicle in the height direction is improved through the screw rod, and meanwhile, the control assembly of the ink-jet vehicle is also beneficial to simplification through the screw rod, so that the maintenance flow is simplified, and the maintenance cost is reduced.

Further, the cleaning and maintaining assembly comprises an ink receiving groove, wherein the ink receiving groove is arranged in the buffer space and is used for receiving waste ink of the inkjet vehicle.

The waste ink after the nozzle is cleaned is collected and guided by the ink receiving groove, so that the service life of the inkjet vehicle is prolonged; the ink receiving groove arranged in the buffer space is beneficial to saving space occupation of the printer, so that the whole volume of the printer is reduced; the cleaning and maintenance of the spray heads at the two ends of the ink-jet vehicle are facilitated for operators.

Further, the cleaning and maintaining assembly further comprises a cleaning assembly, wherein the cleaning assembly is arranged in the operation space and is used for cleaning the spray heads on the inkjet vehicle.

The cleaning component is favorable for flushing and wiping the nozzle attached with the ink drops, so that the influence of the solidification of the ink drops on the nozzle on the ink-jet effect of the nozzle is avoided, the service efficiency of the nozzle is further improved, and the service life of the nozzle is prolonged.

Further, the cleaning and maintaining assembly further comprises a moisturizing assembly, wherein the moisturizing assembly is arranged in the operation space and used for isolating and moisturizing the spray heads on the inkjet vehicle.

The spray head is favorable for moisturizing and sealing the cleaned spray head through the moisturizing component, so that the phenomenon that ink drops in the spray head are subjected to the influence of external environment to be coagulated again is avoided, the spray head can smoothly discharge ink when the spray head is started to spray ink next time, the service efficiency of the spray head is improved, and the service life of the spray head is prolonged.

Further, the cleaning and maintaining assembly further comprises a moisturizing film conveying assembly, wherein the moisturizing film conveying assembly is arranged in the operation space and used for replacing the moisturizing assembly.

The moisturizing module is beneficial to being replaced at regular time through the moisturizing module conveying module, so that the humidity in the moisturizing module is maintained in a higher numerical range, the service efficiency of the spray head is further improved, and the service life of the spray head is prolonged.

Compared with the prior art, the utility model has the beneficial effects that: providing a supporting force for the ink-jet vehicle for reciprocally scanning the ink jet through the frame; the stability of the frame is enhanced through the subframe, a wider moving space is provided for the inkjet vehicle, and meanwhile, the frame is simpler and more portable to manufacture and install; the bending strength of the cantilever beam is increased through the spliced rectangular sub-beams; the suspension structure drives the inkjet vehicle to realize the multi-PASS jack shift printing effect in the X, Y axis direction, and the height is accurately controlled in the Z axis direction; the waste ink collecting and draining device has the advantages that waste ink collecting and draining are realized through the cleaning and maintaining assembly, the cleaning and moisturizing of the spray head are realized, the service efficiency of the spray head is improved, the service life of the spray head is prolonged, and the utilization rate of the whole space of the printer is improved.

Drawings

Fig. 1 is a front view of a multiple PASS inkjet printer of the present utility model.

Fig. 2 is a schematic perspective view of a multiple PASS inkjet printer of the present utility model.

Fig. 3 is an end view of the cantilever structure of the present utility model.

FIG. 4 is a schematic view of a cleaning maintenance assembly according to the present utility model.

FIG. 5 is an enlarged schematic view of the ink receiving slot of the present utility model.

FIG. 6 is an enlarged schematic view of a cleaning assembly according to the present utility model.

Fig. 7 is an enlarged schematic view of a moisturizing assembly and moisturizing film delivery assembly of the present disclosure.

The attached drawings are used for identifying and describing: buffer space 10, print painting space 20, operation space 30, subframe 100, cantilever beam 200, rectangular sub-beam 210, lateral support 211, longitudinal support 212, intermediate support plate 213, inkjet vehicle 300, cleaning maintenance assembly 400, ink receiving tank 410, cleaning assembly 420, moisturizing assembly 430, and moisturizing film conveying assembly 440.

Detailed Description

The drawings are for illustrative purposes only and are not to be construed as limiting the utility model. For better illustration of the following embodiments, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the actual product dimensions; it will be appreciated by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

Examples

As shown in fig. 1-7, the present embodiment provides a multiple PASS inkjet printer, which is disposed above a printing platform, and includes two or more sub-frames 100 distributed along an X direction, a suspension beam 200 connected below the sub-frames 100, and a cleaning maintenance assembly 400, wherein the sub-frames 100 are gate-type supporting frames, the sub-frames 100 and the suspension beam 200 form a buffer space 10, a printing painting space 20, and an operation space 30, the cleaning maintenance assembly 400 is disposed in the operation space 30, the suspension beam 200 includes one, the suspension beam 200 supports the inkjet vehicle 300 by a suspension structure to slide thereon, the inkjet vehicle 300 includes a plurality of groups of inkjet nozzles, each group of inkjet nozzles includes a plurality of inkjet nozzles of the same color arranged in a Y direction, the inkjet nozzles are arranged in a plurality of rows in the X direction, and the a and B inkjet nozzles are arranged in any two rows, so as to implement jack-shift inkjet positions of the a and B inkjet nozzles.

In this embodiment, before the inkjet printing operation is started, the print file is converted into a format required by the print control software by the manuscript raster image processor, after loading, an operator clicks the print in the operation space 30, the printer starts the print task after reading the information of the loaded print file, and the inkjet vehicle 300 slides from the operation space 30 to the print inkjet space 20 along the track of the cantilever 200; the inkjet vehicle 300 moves on the printing and painting space 20 and performs a first scanning inkjet along the track of the cantilever 200; after the ink jet is finished, the ink jet vehicle 300 continues to slide to the buffer space 10 along the track of the cantilever beam 200, so that the ink jet vehicle 300 pauses in the buffer space 10, meanwhile, the ink jet vehicle 300 starts to adjust the displacement in the Y direction, and after the displacement distance is adjusted, the ink jet vehicle 300 slides to the printing and painting space 20 from the buffer space 30; at this time, the inkjet carriage 300 returns along the track of the cantilever 200 to perform the second scanning inkjet; after the ink ejection is completed, the ink jet vehicle 300 stops in the operation space 30.

When the inkjet carriage 300 is suspended in the buffer space 10, the waste ink on the inkjet carriage 300 is intensively drained to the ink receiving tank 410, and the waste ink in the ink receiving tank 410 is connected to a waste ink bottle to realize the effect of waste ink centralized treatment; when the inkjet vehicle 300 stops in the operation space 30 after the inkjet printing work is completed, the cleaning assembly 420 cleans the nozzle on the inkjet vehicle 300, and the moisturizing assembly 430 is used for moisturizing the cleaned nozzle so as to prevent the nozzle from being affected by the external environment and causing the ink drops to coagulate again; until the next time the inkjet vehicle 300 is started for inkjet printing, the nozzles on the inkjet vehicle 300 will remain isolated, closed and moisturized by the moisturizing assembly 430. When the inkjet vehicle 300 is ready to start printing, the moisturizing module 430 is out of contact with the spray head until the next time the moisturizing module 430 seals off the spray head, the moisturizing module 430 is replaced by the moisturizing film delivery module 440, and the optimal moisturizing state is maintained by the replaced moisturizing module 430 each time the spray head seals off.

The spray head A and the spray head B are adjacently arranged.

In this embodiment, the 2PASS inkjet printing includes two times of inkjet, and the advancing ranges of the first inkjet and the second inkjet are the same, and opposite directions, and after the adjacent set a nozzle and B nozzle perform first-PASS inkjet color development on the printing medium, the inkjet vehicle 300 adjusts the jack displacement in the Y direction, and the adjacent set a nozzle and B nozzle perform second-PASS inkjet color development on the printing medium while inkjet, so that the second-PASS color development can cover the color development difference of the first-PASS inkjet, so as to improve the printing precision and the printing effect.

The spray heads C are one row different from the spray heads A or B, and the ink jet vehicle 300 in the step 3 realizes the exchange of the positions of any two rows of spray heads A, B and C along the Y-axis direction according to the displacement distance P.

In this embodiment, the 2PASS inkjet printing includes two inkjet processes, and the travelling ranges of the first inkjet process and the second inkjet process are the same, and the directions of the three groups of nozzles are opposite, the arrangement sequence of the three groups of nozzles is C-se:Sub>A-B, se:Sub>A-B-C, or se:Sub>A-C-B, and when the first PASS of the inkjet development of the se:Sub>A, B, and C nozzles on the printing medium is performed, the inkjet vehicle 300 adjusts the displacement of the jack in the Y direction, and any two groups of the three groups of nozzles simultaneously perform the inkjet development of the second PASS on the printing medium, so that the inkjet range of any two groups of nozzles is wider than the inkjet range of the fixed adjacent groups of nozzles, thereby avoiding the obvious color difference boundary generated after the fixed adjacent groups perform the color difference coverage, and further improving the printing accuracy and the printing effect.

The ink jet width I of the ink jet vehicle on the Y axis is at least one L more than the width H of the printing medium.

In this embodiment, the ink jet width I of the ink jet vehicle on the Y axis is one more L than the width H of the printing medium. The breadth I may also be greater than the breadth H by an integer multiple L.

The cantilever beam is of a rectangular beam structure, the rectangular beam is formed by splicing at least two rectangular sub-beams with the same length direction, the rectangular sub-beams are hollow beams, transverse supports and longitudinal supports are arranged in the rectangular sub-beams, and the width direction of the rectangular sub-beams is not greater than the height direction of the rectangular sub-beams.

In this embodiment, the suspension beam 200 has a rectangular beam structure, and the rectangular beam is used to offset bending wear generated by the reciprocating movement of the inkjet vehicle 300, so as to improve the bending strength of the suspension beam 200; the rectangular beam is formed by welding two rectangular sub-beams 210 with the same length, width and height, and in order to avoid overlarge stress intensity of the frame caused by overlarge weight of the rectangular sub-beams 210, the rectangular sub-beams 210 are hollow beams, so that the service life of the frame is influenced; in order to further improve the bending strength of the rectangular sub-beams 210, 9 lateral supports 211 and 9 longitudinal supports 212 are provided in the rectangular sub-beams 210, and the lateral supports 211 are simultaneously connected to two rectangular sub-beams 210 in a penetrating manner.

The suspension structure comprises a driving device, wherein the driving device and the inkjet vehicle are linear motors in the connection direction of an X axis and a Y axis, and the driving device and the inkjet vehicle are screw rods in the connection direction of a Z axis.

In this embodiment, the linear motor drives the inkjet vehicle 300 to move in the X direction and the Y direction, controls the start, stop, speed change and traveling direction of the inkjet vehicle 300 in the X direction, and controls the displacement distance of the inkjet vehicle 300 in the Y direction; the lead screw drives the inkjet vehicle 300 to adjust the inkjet height along the Z-axis direction; the operator sets parameters of the linear motor and the screw rod before starting the inkjet vehicle 300 to jet ink through the control panel, and can also independently adjust the parameters of the linear motor and the screw rod when stopping the inkjet vehicle 300 to jet ink through the control panel.

The cleaning and maintenance assembly 400 includes an ink receiving slot 410, wherein the ink receiving slot 410 is disposed in the buffer space 10 for receiving waste ink from the inkjet vehicle 300.

In this embodiment, in the inkjet printing process of the inkjet vehicle 300, since the inkjet vehicle 300 is provided with multiple groups of nozzles, a large amount of waste ink is generated by the inkjet vehicle 300, and the inkjet vehicle 300 needs to be maintained and cleaned in time by an operator, when the inkjet vehicle 300 travels to the buffer space 10, the operator cleans the nozzle at one end of the inkjet vehicle 300 far away from the operation space 30, so as to prevent the operator from not thoroughly cleaning the inkjet vehicle 300 in the operation space 30, and at this time, the ink receiving groove 410 can collect the waste ink and waste water generated in the cleaning process; in addition, the ink-jet vehicle 300 may have a phenomenon that ink drops on a nozzle, and the ink receiving slot 410 may collect ink drops. The ink receiving groove 410 is disposed in the buffer space 10, adjacent to and flush with the printing platform, and the ink receiving groove 410 is funnel-shaped, so that the ink receiving surface of the waste ink is large enough to increase the collection capacity, and the waste ink can slowly flow along the gradient, so as to achieve the effect of controlling the flow rate of the waste ink, the waste water and the ink drops in the ink receiving groove 410.

The cleaning and maintenance assembly 400 further includes a cleaning assembly 420, where the cleaning assembly 420 is disposed in the operation space 30 and is used for cleaning the nozzles on the inkjet vehicle 300.

In this embodiment, after the long-time printing of the nozzle on the inkjet vehicle 300, the problem that the nozzle is blocked by the condensation of ink is easily generated, in order to solve the above problem, the cleaning assembly 420 is used to clean the nozzle, when the inkjet vehicle 300 finishes printing and is parked in the operation space 30, the cleaning assembly 420 disposed in the operation space 30 moves to the lower portion of the inkjet vehicle 300, and the cleaning assembly 420 reciprocates along the Y direction and cleans the nozzle by means of negative pressure adsorption, so that the nozzle is kept in a clean state.

The cleaning and maintenance assembly 400 further includes a moisturizing assembly 430, where the moisturizing assembly 430 is disposed in the operation space 30 and is used for isolating and moisturizing the nozzles on the inkjet vehicle 300.

The cleaning and maintenance assembly 400 further includes a moisturizing film delivery assembly 440, wherein the moisturizing film delivery assembly 440 is disposed in the operation space 30 for replacing the moisturizing assembly 430.

In this embodiment, when the inkjet vehicle 300 is started, the nozzle is separated from contact with the moisturizing component 430 and the inkjet vehicle 300 is made to travel from the operation space 30 to the printing and painting space 20; when the inkjet vehicle 300 finishes a printing job and is parked in the operation space 30, the cleaning assembly cleans the nozzles, after the cleaning is finished, the cleaning assembly 420 is withdrawn out of the inkjet vehicle 300, the cleaned nozzles are moisturized by the moisturizing assembly 430, the moisturizing assembly 430 is a moisturizing film, and all the nozzles on the inkjet vehicle 300 are sealed and moisturized by a whole moisturizing film so as to isolate the influence of the external environment on the humidity of the nozzles; when the inkjet vehicle 300 completes the next printing job and stops in the operation space 30, the nozzles that are cleaned by the cleaning assembly 420 need to be moisturized again, and at this time, the moisturizing film conveying assembly 440 conveys a new moisturizing film to the position below the nozzles by a roller structure, and seals all the nozzles to insulate and moisturize.

In this embodiment, the moisturizing module 430 is disposed above the moisturizing film conveying module 440, and the moisturizing module 430 moves up and down in the Z-axis direction to achieve contact or separation between the spray head and the moisturizing module 430, where the highest horizontal surface of the moisturizing film conveying module 440 is lower than the horizontal surface of the printing platform, so as to avoid contact with the spray head in the process of replacing the moisturizing film.

It should be understood that the foregoing examples of the present utility model are merely illustrative of the present utility model and are not intended to limit the present utility model to the specific embodiments thereof. Any modification, equivalent replacement, improvement, etc. that comes within the spirit and principle of the claims of the present utility model should be included in the protection scope of the claims of the present utility model.

Claims (10)

1. The multi-PASS ink-jet printer is arranged above a printing platform and is characterized by comprising more than two subframes distributed along the X direction, a cantilever beam connected below the subframes, and a cleaning maintenance assembly, wherein the subframes are door-shaped supporting frames, the subframes and the cantilever beam form a buffer space, a printing and painting space and an operating space, the cleaning maintenance assembly is arranged in the operating space, the cantilever beam comprises one, the cantilever beam supports the ink-jet vehicle to slide on the cantilever beam through a hanging structure, the ink-jet vehicle comprises a plurality of groups of spray heads, each group of spray heads comprises a plurality of spray heads with the same color, the spray heads are arranged into a plurality of rows in the X direction, the spray heads A and the spray heads B are arranged into any two rows, and jack shifting ink-jet of the positions of the spray heads A and the spray heads B are realized.

2. The multiple PASS inkjet printer of claim 1 wherein the C-head is a different row than the a-head or the B-head, and the inkjet vehicle is configured to interchange any two rows of positions of the a-head, the B-head, and the C-head by a displacement distance P along the Y-axis.

3. The multiple PASS inkjet printer of claim 1 wherein the subframe comprises two posts and a support beam attached to the top ends of the two posts, the posts and the cantilever beam forming a first frame surface in the X-direction and the posts and the support beam forming a second frame surface in the Y-direction.

4. A multiple PASS inkjet printer according to claim 3 wherein on the first frame face, the spacing of the two subframes, d1: the ratio of the length D of the cantilever beam is 1/2, and the distance between the subframe and the end part D2 of the cantilever beam is as follows: the ratio of the length D of the cantilever beam is 1/4.

5. The multiple PASS inkjet printer of claim 1, wherein the cantilever beam is a rectangular beam structure, the rectangular beam is formed by splicing at least two rectangular sub-beams with the same length direction size, the rectangular sub-beams are hollow beams, a transverse support and a longitudinal support are arranged inside the rectangular sub-beams, and the width direction size of the rectangular sub-beams is not greater than the height direction size.

6. The multiple PASS inkjet printer of claim 1 wherein the suspension structure comprises a drive device, the drive device and the inkjet carriage are linear motors in the X-axis and Y-axis connection directions, and the drive device and the inkjet carriage are lead screws in the Z-axis connection directions.

7. A multiple PASS inkjet printer according to any one of claims 1 to 6 wherein the cleaning maintenance assembly includes an ink receiving slot provided in the buffer space for receiving waste ink from the inkjet vehicle.

8. A multiple PASS inkjet printer according to any one of claims 1 to 6 wherein the cleaning maintenance assembly further includes a cleaning assembly disposed within the operating space for cleaning the nozzles on the inkjet vehicle.

9. A multiple PASS inkjet printer according to any one of claims 1 to 6 wherein the cleaning maintenance assembly further comprises a moisturizing assembly disposed within the operating space for insulating and moisturizing the nozzles on the inkjet vehicle.

10. The multiple PASS inkjet printer of claim 9 wherein the cleaning maintenance assembly further comprises a moisturizing film delivery assembly disposed within the operating space for replacing the moisturizing assembly.