WO2019237961A1

WO2019237961A1 - Inkjet printing device

Info

Publication number: WO2019237961A1
Application number: PCT/CN2019/089904
Authority: WO
Inventors: 张原�; 张征宇
Original assignee: 北京美科艺数码科技发展有限公司; 张原�
Priority date: 2018-06-11
Filing date: 2019-06-04
Publication date: 2019-12-19
Also published as: CN108528065A

Abstract

An inkjet printing device comprises a printing part (3), a base part (4), a platform part (5), a lifting device (1), and a stepping device (2). The printing part (3) is mounted above the base part (4), and the printing part (3) comprises a printing crossbeam and a printing carriage. The printing crossbeam is disposed along an X-axis direction. The printing carriage is disposed on the printing cross beam. The printing carriage can perform reciprocal motion along the print crossbeam in the X-axis direction. A print nozzle is disposed below the print carriage. The lifting device (1) is disposed in a middle region of the base part (4), and an inner side of the lifting device (1) is connected to the stepping device (2). The platform part (5) is mounted above the stepping device (2). The lifting device (1) is used to drive the stepping device (2) at the inner side thereof and the platform part (5) to synchronously perform lifting motions along a Z-axis direction, and the stepping device (2) is used to drive the platform part (5) above the stepping device (2) to perform a stepping motion along a Y-axis direction. The printing platform of the inkjet printing device has a large lifting range, a compact structure, a small device footprint, and a wide print object range.

Description

Inkjet printing device

Technical field

The invention relates to an inkjet printing device, in particular to an inkjet printing device capable of lifting and lowering a printing platform in a high range.

Background technique

Generally, during the work of an inkjet printer, the distance between the nozzle and the print object needs to be adjusted according to the size of the print object to ensure the best printing effect. One of the existing solutions is to adjust the elevation of the print head to maintain the distance between the print head and the print object, such as patents 200720179080 and 201010101452. However, because the printing object has high requirements for the printer's automatic control accuracy, it is relatively difficult to control the distance between the print head and the printing platform. In order to ensure the print quality, the second existing solution is to use the print head at a fixed height and the printing platform to rise and fall. Way to adjust the distance between the print head and the print object, such as the patent 201220525787.X, which uses the rotation of the screw shaft to drive the bracket body and the slider body to slide horizontally along the slide rail, thereby driving the components connected to the bracket body. One end angle of the inverted "V" cross swing arm is moved to change the cross angle of the swing arm to achieve the lifting of the printing platform. The lifting device is designed directly below the printing platform and only controls the lifting of the printing platform. When moving to scan printing, the stepping device is installed under the lifting device, and the stepping process needs to drive the lifting device together. This design method usually requires a low lifting height. If you want to print a high thickness to be printed When objects such as balls are used, the printing platform needs to have a high lifting range. At this time, this design is still used. The method is to increase the lifting height of the lifting device. With the position of the base and the stepping device unchanged, the height of the lifting device is increased, and the entire printing device must be increased accordingly. Affect the appearance. At this time, it is necessary to design a new structure that uses space reasonably and reduces the area occupied by the machine.

technical problem

The purpose of the present invention is to overcome the defects in the prior art, and provide an inkjet printing device with stable work, large lifting range, compact structure and space saving.

Technical solutions

The above technical problem of the present invention is solved by the following technical solution: An inkjet printing device is provided, which includes a printing part, a base part, a platform part, a lifting device, and a stepping device. The printing part is installed above the base part. The printing part includes a printing beam and a printing cart. The printing beam is set along the X axis direction. A printing cart is arranged on the printing beam. The printing cart can move back and forth along the printing beam in the X axis direction. A printing nozzle is arranged below the printing cart. A lifting device is set in the middle area of the base part. A stepping device is connected to the inside of the lifting device. A platform portion is installed above the stepping device. The lifting device is used to drive the stepping device and the platform portion on the inside to perform the lifting movement in the Z-axis direction. The step device is used to drive the platform part above it to perform step motion along the Y-axis direction.

In the above inkjet printing device, the lifting device includes a driving mechanism, a lifting mechanism, a guide mechanism, and a connecting mechanism. The lifting mechanism includes a lifter and a synchronous optical axis. One end of the lifter is connected to the drive mechanism and is used for horizontally placing along the X axis. The horizontal drive of the driving mechanism is changed to a vertical movement along the Z axis. The other end of the lift is connected to the synchronous optical axis, and the other end of the synchronous optical axis is symmetrically connected to the other lift. The two ends are symmetrically designed. The lifting process at the end is carried out synchronously. A wire nut is provided on the upper end of the lifter, and the wire nut rotates up or down along the screw rod of the lifter to drive the stepping device and the platform part connected to the connecting mechanism to rise or fall.

In the above-mentioned inkjet printing device, the inside of the elevator adopts a worm gear structure, and the upper end of the elevator converts a rotary motion into a linear motion through a ball screw pair.

In the above inkjet printing device, the driving mechanism is connected to the elevator through a coupling.

In the above inkjet printing device, the guide mechanism includes a guide rail provided in a vertical direction along the Z axis and a slider matched with the guide rail, and the guide rail is fixedly installed on the vertical guide rail fixing plate to cooperate with the guide rail. The slider is connected to the connecting mechanism.

In the above-mentioned inkjet printing device, the guide rails and the sliders are each provided at a set of four ends for ensuring the stability of the lifting process.

In the above inkjet printing device, the lifting device further includes an anti-collision device, and the anti-collision devices are respectively arranged at the extreme positions of the top end and the bottom end, and play a role of mechanical limit and protection.

In the above inkjet printing device, the connection mechanism includes a silk mother mounting plate and a lifting plate. The silk mother is connected to the lifting plate through the silk mother mounting plate, and the lifting plate is finally supported by the Y-axis in the stepping device. The fixing plates are connected.

In the above-mentioned inkjet printing device, the lifting device can drive the stepping device and the platform to move up and down at least 500 millimeters simultaneously.

In the above inkjet printing device, an accordion cover is provided below the stepping device and outside the lifting device, and the accordion cover is stretched or compressed with the lifting device.

Beneficial effect

The ink-jet printing device designed by the present invention is different from the conventional method of installing a lifting device directly below the printing platform part, but is provided with a Z-axis hanging lifting device on both sides of the Y-axis stepping device and the printing platform part, and simultaneously The Y-axis stepping device is raised and lowered together with the printing platform part. In this way, using the inherent height center free area of the printing device base design, a high range of lifting can be achieved (lifting height H can reach 500mm or higher), instead of the prior art. A lifting device is arranged above the Y-axis stepping device to occupy additional lifting height, so that the printing device has a compact structure, saves space, and has a beautiful appearance. In addition, the lifting device has a stable structure and a large lifting range, which also expands the types of objects to be printed and increases the competitiveness of the industry.

BRIEF DESCRIPTION OF THE DRAWINGS

1 is a schematic perspective view of an inkjet printing device according to a specific embodiment of the present invention;

2 is a schematic perspective view of the inkjet printing device after the organ cover is hidden in FIG. 1 according to the present invention;

3 is a schematic perspective view of a stepping device and a platform rising to the highest position in a specific embodiment of the present invention;

4 is a left side view of FIG. 3 in a specific embodiment of the present invention;

5 is a schematic perspective view of a stepping device and a platform lowered to the lowest position in a specific embodiment of the present invention;

6 is a schematic diagram of a printing device when a stepping device and a platform portion are lowered to a lowest position in a specific embodiment of the present invention;

FIG. 7 is a schematic perspective view of a Y-axis stepping device in a specific embodiment of the present invention.

The serial numbers in the figure are as follows: lifting device 1, stepping device 2, printing section 3, base section 4, printing platform section 5, organ cover 10, motor 11, lift 12, synchronous optical axis 13, guide rail 14, slider 15 Lifting wire female mounting plate 16, first lifting plate 17, second lifting plate 18, Y-axis support fixing plate 19, anti-collision device 111, bottom anti-collision block 112, lifting wire mother 121, coupling 131 , Guide plate 141, auxiliary fixing plate 142, corner joint 171, second motor 21, Y-direction slide rail 22, Y-direction screw 23, aluminum profile 4, housing 25 and connection plate 26.

Embodiments of the invention

The inkjet printing device in the present invention will be described in detail below with reference to the embodiments and the accompanying drawings.

As shown in FIG. 1-2, the inkjet printing apparatus includes a printing section 3, a base section 4, a printing platform section 5, a lifting device 1, and a stepping device 2. The printing section 3 includes a printing beam and a printing trolley. The printing beam is arranged along the X axis direction. A printing trolley is arranged on the printing beam. The printing trolley can move back and forth along the printing beam in the X axis direction. A printing nozzle is arranged below the printing trolley. The ink droplets are jet-printed on the medium to be printed to form a desired graphic. The printing part 3 is installed above the base part 4, and a lifting device 1 is provided in the middle area of the base part 4. A stepping device 2 is connected to the inside of the lifting device 1. A printing platform part 5 is installed above the stepping device 2. The lifting device 1 is used for The stepping device 2 and the printing platform portion 5 hanging on its inner side are driven to vertically move in the Z-axis direction, and the stepping device 2 is used to drive the printing platform portion 5 above it to perform stepping movement in the Y-axis direction. Below the stepping device 2, an organ cover 10 is provided outside the lifting device 1. The organ cover 10 is stretched or compressed with the lifting of the lifting device 1 to block parts inside the lifting device 1 for the appearance of the device.

The structure of the Z-axis lifting device according to the present invention is described below with reference to FIGS. 3-4. The lifting device 1 includes a motor 11, a lifter 12, a synchronous optical axis 13, a guide rail 14, a slider 15, and a lifting wire mother mounting plate 16. The motor 11 is selected. Stepper motor is used to connect the lifter 12, the lifter 12 selects the worm and worm reducer, the motor 11 is used to drive the worm and worm in the lifter 12 to rotate to convert the horizontal movement into the rotary motion of the upper screw of the lifter 12, and the motor 11 A shaft device (not shown in the figure) is connected to the lifter 12, and the other end of the lifter 12 in the horizontal direction is connected to a synchronous optical axis 13 through a coupling 131. A lifter 12 is symmetrically arranged at the other end of the synchronous optical axis 13 to synchronize Optical axis 13 is used to make the lifting process at both ends synchronized and stable. Except for the motor 11 at both ends of the synchronous optical axis 13, other mechanical structures are symmetrically arranged: a lifting wire mother 121 is installed on the screw rod above the elevator 12 and the lifting wire The nut 121 and the screw rod of the elevator 12 constitute a ball screw auxiliary structure, which converts the rotary motion into a linear motion, that is, the lifting nut 121 can rotate along the screw rod of the elevator 12 to rise or fall. 1 is connected to the first lifting plate 17 through the lifting wire mother mounting plate 16, and the two ends of the first lifting plate 17 are connected to the two second lifting plates 18 through the two corner joints 171 respectively to change the support surface. The rising plate 18 is then connected to two Y-axis support fixing plates 19, and the Y-axis support fixing plate 19 is connected to the stepping device 2 above. The driving of the motor 11 can control the lifting and lowering of the Y-axis support fixing plate 19 to control it. The connected stepping device 2 moves vertically along the screw rod above the elevator 12.

An auxiliary fixing plate 142 is provided on the upper end of the worm and worm engagement portion of the elevator 12 along the Y-axis direction to avoid the screw rod. Each end of the auxiliary fixing plate 142 is respectively connected to a guide plate 141, and a guide rail is installed on each guide plate 141. 14. Also designed symmetrically at both ends of the synchronous optical axis 13, that is, four guide plates 141 are provided at the four end positions, and four guide rails 14 are fixedly arranged. Each of the guide rails 14 is provided with a slider 15 and a slider 15 respectively. Connected to the first lifting plate 17, the slide rail 15 of the guide rail 14 is designed to ensure the stability of ascending and descending in the vertical direction, that is, the Z-axis direction, and plays a guiding role.

In addition, an anti-collision device 111 is provided at each of the top end positions of the four end portions to ensure the highest limit position of the printing platform portion 5 ascending, and a bottom-end anti-collision block 112 is provided at each of the bottom end positions of the four end portions. It is used to ensure the lowest limit position of the lowering of the printing platform part 5 so as to play a role of mechanical protection.

During use, according to the height of the object to be printed, the lifting device 1 is required to adjust the stepping device 2 and the printing platform portion 5 above the vertical lifting in the Z-axis direction. The motor 11 starts to work and drives the inside of the lifter 12 through the coupling. The rotation of the worm and worm wheel drives the screw rod above the lifter 12 to rotate, so that the lifting wire mother 121 connected to the screw shaft rotates along the screw shaft, and the lifting movement of the lifting wire mother 121 in the direction of the screw shaft, that is, the Z axis, can be realized. Finally, the first lifting plate connected to the lifting wire mother 121, the second lifting plate 18 connected to the first lifting plate 17, the Y-axis support fixing plate 19 connected to the second lifting plate 18, and the Y-axis are driven. The stepping device 2 connected to the support plate 19 and the printing platform portion 5 connected above the stepping device 2 synchronize the vertical lifting movement in the Z-axis direction. During the lifting movement, it and the first lifting plate 17 both The end-connected slider 15 slides synchronously along the guide rail 14 in the vertical direction to ensure the verticality and stability of the lifting. Finally, the distance between the object to be printed and the print head arranged on the printing platform part 5 is adjusted to the most suitable distance for printing.

The lifting device 1 can adjust the lifting height to a range of 500 mm. As shown in FIG. 5, it is a three-dimensional schematic diagram of the Z-axis lifting device driving the stepping device 2 and the printing platform portion 5 to the lowest position. 6 shown. Such a wide range of lifting heights can increase the types of printed objects, such as printing on some higher-sized objects such as balls. The lifting device simultaneously drives the lifting of the Y-axis stepping device 2 and the printing platform portion 5 connected to the inner side. It is not necessary to set a lifting device between the top of the Y-axis stepping device and the printing platform portion according to the conventional design, and the space in the middle of the base portion can be used. The space enables the printing platform to be lowered to the lowest end near the ground, saving twice the space of the height. At the same time, the hanging type can also save the volume of the side and the lifting device, which makes the printing device compact and smaller.

FIG. 7 is a schematic perspective view of the Y-axis stepping device 2 of the present invention. The stepping device 2 includes a second motor 21, a Y-direction slide rail 22, a Y-direction screw 23, an aluminum profile 24, and a housing 25. The stepping device 2 is connected by The plate 26 is installed on the inner side of the lifting device 1 and is fixed around the periphery by a housing 25. A second motor 21 is provided at the center of the inner end of the stepping device 2. The second motor 21 is connected to the Y-direction screw 23, and the second motor 21 is used for The Y-direction screw 23 is driven to rotate. The Y-direction screw 23 is provided with a silk mother. The silk mother is connected to the printing platform part 5 through a silk mother mounting seat. The printing platform connected to the silk mother can be driven by the driving of the second motor 21 The movement of the part 5 along the Y-axis direction, the printing platform part 5 performs the stepwise movement of the Y-axis direction during the actual printing process. During the movement, a slider (not shown in the figure) connected with the lower part of the printing platform 5 cooperates with the Y-direction slide rail 22 to play a guiding role. In addition, an aluminum profile 24 is provided for positioning and supporting and connecting functions.

The working process of the printing device in the actual printing process is: the first step is to install the object to be printed on the printing platform part 5 (to fix the object to be printed, the printing platform part 5 can also be equipped with supporting fixtures for installation), the motor 11 Drive the lifting device 1 to drive the stepping device 2 and the printing platform portion 5 to move up and down in the Z axis direction, so as to adjust the distance between the object to be printed and the print head to the most suitable printing distance; in the second step, the printing of the printing portion 3 The carriage moves back and forth along the X axis, and at the same time, the nozzle of the printing carriage sprays ink droplets on the object to be printed below to form a picture and text. In the third step, after the printing carriage returns to the initial position in the X axis direction, the stepping device 2 drives The upper printing platform part 5 steps a preset distance along the Y axis; the fourth step is to repeat the second and third steps until the printing of the image on the object to be printed is completed.

It should be noted that the number of times the print carriage moves back and forth along the X axis in the second step is determined according to the required print resolution of the image; in the printing method, sometimes ink droplets are ejected during the journey along the X axis, and not ejected during the return journey. Ink droplets are sometimes ejected during the round trip, and controlled by software according to the actual situation and needs. In addition, the stepping device 2 controls the stepping motion, which can be stepped after the printing cart returns to the initial position in the X axis direction. It can also step after the printing cart reaches the end position in the X-axis direction. The specific distance of the step can be controlled by software according to actual needs.

It should be noted that any modification made according to the specific embodiments of the present invention does not depart from the spirit of the present invention and the scope described in the claims.

Claims

An inkjet printing device includes a printing part, a base part, a platform part, a lifting device and a stepping device. The printing part is installed above the base part. The printing part includes a printing beam and a printing trolley, and the printing beam is arranged along the X axis direction. A printing trolley is arranged on the printing beam, and the printing trolley can move back and forth along the printing beam in the X-axis direction. A printing nozzle is arranged below the printing trolley, which is characterized in that a lifting device is arranged in the middle area of the base part, and the inside of the lifting device is connected to a step The lifting device is used to drive the platform part above the stepping device. The lifting device is used to drive the stepping device inside the platform and the platform part to move up and down along the Z axis. The stepping device is used to drive the platform part above it to move along the Y axis. Step motion.
The inkjet printing device according to claim 1, wherein the lifting device comprises a driving mechanism, a lifting mechanism, a guide mechanism, and a connecting mechanism, the lifting mechanism includes a lift and a synchronous optical axis, and one end of the lift is connected to the drive mechanism, In order to change the horizontal drive of the driving mechanism placed horizontally along the X axis to a vertical movement along the Z axis, the other end of the lift is connected to the synchronous optical axis, and the other end of the synchronous optical axis is symmetrically connected to the other lift. The two ends are symmetrically designed. The synchronous optical axis is used to synchronize the lifting process at both ends. A screw nut is provided on the upper end of the lifter, and the screw nut rotates up or down along the screw rod of the lifter to drive the stepping device and the platform part connected to the connecting mechanism to rise. Or fall.
The inkjet printing device according to claim 2, wherein the inside of the elevator adopts a worm gear type structure, and the upper end of the elevator converts the rotary motion into a linear motion through a ball screw pair.
The inkjet printing device according to claim 2, wherein the driving mechanism is connected to the elevator through a coupling.
The inkjet printing device according to claim 2, wherein the guide mechanism includes a guide rail provided in a vertical direction along the Z axis and a slider matching the guide rail, and the guide rail is fixedly installed in the vertical installation The guide rail fixing plate is connected with a slider that is matched with the slider.
The inkjet printing device according to claim 5, wherein each of the guide rail and the slider is provided at a set of four ends for ensuring the stability of the lifting process.
The inkjet printing device according to claim 2, wherein the lifting device further comprises an anti-collision device, and the anti-collision devices are respectively arranged at the extreme positions of the top end and the bottom end to play a role of mechanical limit and protection. .
The inkjet printing device according to claim 2, wherein the connection mechanism comprises a silk mother mounting plate and a lifting plate, the silk mother is connected to the lifting plate through the silk mother mounting plate, and the lifting plate is finally connected to the step. The Y-axis support fixing plate in the feeding device is connected.
The inkjet printing device according to claim 1, wherein the lifting device can drive the stepping device and the platform portion to be synchronously raised and lowered by at least 500 mm.
The inkjet printing device according to claim 1, wherein an organ cover is provided below the stepping device and outside the lifting device, and the organ cover is stretched or compressed with the lifting of the lifting device.