Scraper device and screen printing device

Abstract

The utility model relates to the technical field of screen printing machines, and discloses a scraper device and a screen printing device with the scraper device, the scraper device comprises a lifting driving mechanism, two cross rods and two sets of scrapers, the lifting driving mechanism comprises a rotary driving mechanism, a synchronous belt and four sets of lead screw pairs, the four sets of lead screw pairs are vertically arranged and distributed in a four-corner mode, and the two cross rods are arranged on the rotary driving mechanism. The rotary driving mechanism is in transmission connection with lead screws of the four lead screw pairs through a synchronous belt; the two ends of one cross rod are connected with the two lead screw nut seats of the two lead screw pairs, and the two ends of the other cross rod are connected with the two lead screw nut seats of the other two lead screw pairs; and the two groups of scrapers are respectively arranged on the two cross rods. The rotary driving mechanism synchronously drives the lead screws of the four lead screw pairs to rotate through the synchronous belt, the four lead screw nut seats drive the two transverse rods and the two scrapers to synchronously ascend and descend, then it is guaranteed that the two scrapers synchronously move with high precision, the contact ratio of the two scrapers on the contact line of the screen frame is guaranteed, and the risk of crushing a workpiece is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of screen printing machines, in particular to a scraper device and a screen printing device. Background Art

[0002] The vertical screen printing machine can screen print on both sides of the workpiece at the same time, which requires the two sets of scrapers on both sides of the workpiece to achieve high-precision synchronous movement. At present, two lifting groups are usually set to drive the two sets of scrapers respectively. Both lifting groups are equipped with power sources, or a power source is set, and then the two lifting groups are divided into an active lifting group and a driven lifting group. The active lifting group and the driven lifting group are connected through a transmission mechanism. This structure has a large transmission error. The direct reaction is that the contact lines of the two sets of scrapers on the screen frame do not overlap, which causes the deflection stress to damage the workpiece. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides a scraper device that can achieve high-precision synchronous movement and reduce the risk of crushing workpieces.

[0004] The utility model also provides a silk screen printing device with the scraper device.

[0005] A scraper device according to an embodiment of the first aspect of the utility model includes a lifting drive mechanism, two cross bars and two groups of scrapers. The lifting drive mechanism includes a rotation drive mechanism, a synchronous belt and four groups of screw pairs. The four groups of screw pairs are vertically arranged and distributed in four corners. The rotation drive mechanism is connected to the screw transmission of the four groups of screw pairs through the synchronous belt; the two ends of one cross bar are connected to the two screw nut seats of the two groups of screw pairs, and the two ends of the other cross bar are connected to the two screw nut seats of the other two groups of screw pairs; the two groups of scrapers are arranged on the two cross bars.

[0006] At least the following beneficial effects are achieved:

[0007] The rotary drive mechanism synchronously drives the four groups of screws of the screw pairs to rotate through the synchronous belt, so that the four screw nut seats are synchronously lifted and lowered, and the four screw nut seats drive the two cross bars and the two groups of scrapers to be lifted and lowered synchronously, thereby ensuring that the two groups of scrapers move synchronously with high precision, ensuring the overlap of the contact lines of the two groups of scrapers on the screen frame, and reducing the risk of crushing the workpiece.

[0008] According to some embodiments of the utility model, a tensioning mechanism is further included, wherein the tensioning mechanism includes a tensioning wheel arranged between the four groups of the screw pairs, the synchronous belt is wound around the tensioning wheel, and the tensioning wheel is used to tension the synchronous belt.

[0009] According to some embodiments of the present utility model, the tensioning mechanism further includes a bottom plate, a sliding seat, and an adjusting member. The sliding seat is slidably disposed on the bottom plate. The tensioning wheel is disposed on the sliding seat. The adjusting member is disposed on the bottom plate. The adjusting member is connected to the sliding seat, and the adjusting member is used to drive the sliding seat to move so as to adjust the tension of the synchronous belt.

[0010] According to some embodiments of the present utility model, the adjusting member is a first screw. The adjusting member is in threaded connection with the bottom plate. One end of the adjusting member is rotatably connected to the sliding seat, or the adjusting member is rotatably connected to the bottom plate, and one end of the adjusting member is in threaded connection with the sliding seat.

[0011] According to some embodiments of the present utility model, a guiding and limiting groove is provided on the bottom plate, and a limiting member is provided on the sliding seat. The limiting member passes through the guiding and limiting groove to limit the sliding seat to slide on the bottom plate.

[0012] According to some embodiments of the present utility model, the guiding and limiting groove penetrates through the upper and lower surfaces of the bottom plate. The guiding and limiting groove is a stepped hole that is smaller at the top and larger at the bottom. The limiting member is a second screw. The large end of the limiting member passes through the lower end of the guiding and limiting groove, and the small end of the limiting member passes through the upper end of the guiding and limiting groove and is in threaded connection with the sliding seat.

[0013] According to some embodiments of the present utility model, it further includes a mounting plate. The lower ends of the four guide columns of the four sets of lead screw pairs are all disposed on the mounting plate. The lower ends of the four lead screws all extend below the mounting plate and are all connected with driven pulleys. The rotary drive mechanism is disposed below the mounting plate. The output end of the rotary drive mechanism is connected with a driving pulley, and the driving pulley is located between the four driven pulleys. The synchronous belt is wound around the driving pulley and the four driven pulleys.

[0014] According to some embodiments of the present utility model, one end of the cross bar is hinged to the lead screw nut seat of one set of the lead screw pairs, and the other end of the cross bar is connected to the lead screw nut seat of another set of the lead screw pairs through a fastener. A handle is provided on the cross bar.

[0015] The silk printing device according to the second aspect embodiment of the present utility model includes a frame, a screen frame connecting mechanism, a workpiece clamping mechanism, and a squeegee device according to the first aspect embodiment of the present utility model, all of which are disposed on the frame. The screen frame connecting mechanism is used to fix the screen frame. The workpiece clamping mechanism is used to fix the workpiece. The squeegee device is used to scrape the ink on the screen frame.

[0016] It has at least the following beneficial effects:

[0017] The screen printing device has all the beneficial effects brought by the doctor blade device in the above embodiment, and will not be repeated here.

[0018] Additional aspects and advantages of the present utility model will be given in part in the following description, become apparent in part from the following description, or be understood through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present utility model will be further described below in conjunction with the drawings and embodiments, where:

[0020] Figure 1 is a schematic structural diagram of an embodiment of the present utility model;

[0021] Figure 2 is a schematic structural diagram of the embodiment of the present utility model after hiding the mounting plate and the doctor blade;

[0022] Figure 3 is Figure 2 a partial enlarged schematic view of part A in

[0023] Reference numerals in the drawings:

[0024] Lifting drive mechanism 100; Rotating drive mechanism 110; Synchronous belt 120; Lead screw 130; Lead screw nut seat 140; Guide post 150;

[0025] Cross bar 200; Handle 210;

[0026] Doctor blade 300;

[0027] Tensioning mechanism 400; Tensioning wheel 410; Base plate 420; Guide and limit groove 421; Sliding seat 430; Adjusting member 440;

[0028] Mounting plate 500. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] Embodiments of the present utility model will be described in detail below. Examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation of the present utility model.

[0030] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as up, down, front, back, left, right, etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model.

[0031] In the description of the present utility model, "a plurality" means more than two. If there is a description of "first" or "second", it is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0032] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0033] Reference Figure 1 and Figure 2 The utility model discloses a scraper device, including a lifting drive mechanism 100, two cross bars 200 and two groups of scrapers 300. The lifting drive mechanism 100 includes a rotation drive mechanism 110, a synchronous belt 120 and four groups of lead screw pairs. The four groups of lead screw pairs are vertically arranged and distributed in four corners. The rotation drive mechanism 110 is connected to the lead screws 130 of the four groups of lead screw pairs through the synchronous belt 120; the two ends of one cross bar 200 are connected to the two lead screw nut seats 140 of the two groups of lead screw pairs, and the two ends of another cross bar 200 are connected to the two lead screw nut seats 140 of the other two groups of lead screw pairs; the two groups of scrapers 300 are respectively arranged on the two cross bars 200.

[0034] The rotating drive mechanism 110 synchronously drives the lead screws 130 of the four lead screw pairs to rotate through the synchronous belt 120, so that the four lead screw nut seats 140 are synchronously lifted and lowered, and the four lead screw nut seats 140 drive the two cross bars 200 and the two groups of scrapers 300 to be lifted and lowered synchronously, thereby ensuring that the two groups of scrapers 300 move synchronously with higher precision, ensuring the overlap of the contact lines of the two groups of scrapers on the screen frame, and reducing the risk of crushing the workpiece.

[0035] Reference Figure 2 and Figure 3 In some of the embodiments, the scraper device also includes a tensioning mechanism 400, which includes a tensioning wheel 410 arranged between the four groups of screw pairs, and the synchronous belt 120 is wound around the tensioning wheel 410. The tensioning wheel 410 is used to tension the synchronous belt 120 to ensure the tension of the synchronous belt 120, thereby ensuring the synchronous operation of the four groups of screw pairs.

[0036] Reference Figure 3, in some of these embodiments, the tensioning mechanism 400 further includes a bottom plate 420, a sliding seat 430, and an adjusting member 440. The sliding seat 430 is slidably disposed on the bottom plate 420. The tensioning pulley 410 is disposed on the sliding seat 430. The adjusting member 440 is disposed on the bottom plate 420. The adjusting member 440 is connected to the sliding seat 430. The adjusting member 440 is used to drive the sliding seat 430 to move on the bottom plate 420, adjust the positions of the sliding seat 430 and the tensioning pulley 410, and thus adjust the tension of the timing belt 120.

[0037] In some of these embodiments, the adjusting member 440 is a first screw. The adjusting member 440 is threadedly connected to the bottom plate 420. One end of the adjusting member 440 is rotatably connected to the sliding seat 430, or the adjusting member 440 is rotatably connected to the bottom plate 420, and one end of the adjusting member 440 is threadedly connected to the sliding seat 430. Rotating the adjusting member 440 can drive the sliding seat 430 to move on the bottom plate 420.

[0038] Refer to Figure 3 , in some of these embodiments, a guiding and limiting groove 421 is provided on the bottom plate 420, and a limiting member is provided on the sliding seat 430. The limiting member passes through the guiding and limiting groove 421 to limit the sliding seat 430 to slide on the bottom plate 420. The guiding and limiting groove 421 serves to drive the moving direction of the guiding sliding seat 430 and at the same time limits the sliding seat 430 on the bottom plate 420.

[0039] In some of these embodiments, the guiding and limiting groove 421 penetrates the upper and lower surfaces of the bottom plate 420. The guiding and limiting groove 421 is a stepped hole that is smaller at the top and larger at the bottom. The limiting member is a second screw. The large end of the limiting member passes through the lower end of the guiding and limiting groove 421, and the small end of the limiting member passes through the upper end of the guiding and limiting groove 421 and is threadedly connected to the sliding seat 430. The large end of the limiting member cannot pass through the upper end of the guiding and limiting groove 421, thus limiting the sliding seat 430 on the bottom plate 420.

[0040] During installation, the small end of the limiting member passes through the guiding and limiting groove 421 from bottom to top. After the small end of the limiting member extends above the bottom plate 420, it is threadedly connected to the sliding seat 430. The limiting member can be a screw or a bolt.

[0041] Refer to Figure 1 and Figure 2, in some of these embodiments, the doctor blade device further includes a mounting plate 500. The lower ends of the four guide posts 150 of the four sets of lead screw pairs are all arranged on the mounting plate 500. The mounting plate 500 supports the four guide posts 150. The lower ends of the four lead screws 130 all extend below the mounting plate 500 and are all connected with driven pulleys. The rotary drive mechanism 110 is arranged below the mounting plate 500. The output end of the rotary drive mechanism 110 is connected with a driving pulley, and the driving pulley is located between the four driven pulleys. The timing belt 120 is wound around the driving pulley and the four driven pulleys. The rotary drive mechanism 110 drives the driving pulley to rotate. The driving pulley drives the four driven pulleys to rotate synchronously through the timing belt 120. The four driven pulleys drive the four lead screws 130 to rotate synchronously, thereby realizing driving the four lead screw nuts 140, the two cross bars 200 and the two sets of doctor blades 300 to lift and lower synchronously.

[0042] In some of these embodiments, one end of the cross bar 200 is hinged to the lead screw nut 140 of one set of lead screw pairs, and the other end of the cross bar 200 is connected to the lead screw nut 140 of another set of lead screw pairs through a fastener. The other end of the cross bar 200 can be unfastened through the fastener, so as to swing the cross bar 200. When the cross bar 200 is far away from the lead screw pairs and the screen frame, it is convenient for the installation, disassembly, maintenance and debugging of the doctor blade 300.

[0043] Referring to Figure 3 , a handle 210 is arranged on the cross bar 200. It is convenient to drive the cross bar 200 to swing through the handle 210.

[0044] It can be conceived that two sets of lead screw pairs are in the front, and the other two sets of lead screw pairs are in the back. The four sets of lead screw pairs are distributed in a rectangle. The two ends of one cross bar 200 are respectively connected to the two lead screw nuts 140 of the two sets of lead screw pairs in the front, and the two ends of the other cross bar 200 are respectively connected to the two lead screw nuts 140 of the two sets of lead screw pairs in the back.

[0045] It can be understood that the rotary drive mechanism 110 is connected to the lower surface of the mounting plate 500. The rotary drive mechanism 110 is a motor. The mounting plate 500 is connected to the bottom plate 420 through a U-shaped connecting plate. The mounting plate 500 supports the bottom plate 420 through the U-shaped connecting plate. Four mounting holes are arranged on the mounting plate 500. The four mounting holes all penetrate through the upper and lower surfaces of the mounting plate 500. Bearings are installed in the four mounting holes, and the four bearings are respectively sleeved on the four lead screws 130. The lower ends of the four lead screws 130 all extend below the mounting plate 500.

[0046] The utility model discloses a silk screen printing device, which comprises a frame, a screen frame connecting mechanism, a workpiece clamping mechanism and the above-mentioned squeegee device, all of which are arranged on the frame. The frame is connected to the mounting plate 500 of the squeegee device. The screen frame connecting mechanism is used to fix the screen frame, the workpiece clamping mechanism is used to fix the workpiece, and the squeegee device is used to scrape the ink on the screen frame so as to realize silk screen printing on the workpiece.

[0047] The silk screen printing device has all the beneficial effects brought by the squeegee device in the above-mentioned embodiment, and will not be repeated here.

[0048] The technical features of the above embodiments can be combined arbitrarily. For the sake of brief description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0049] Certainly, the utility model is not limited to the above embodiments. Those skilled in the art can make equivalent deformations or substitutions without departing from the spirit of the utility model, and these equivalent deformations or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A scraper device, characterized in that: include: A lifting drive mechanism (100) comprises a rotation drive mechanism (110), a synchronous belt (120) and four sets of lead screw pairs, wherein the four sets of lead screw pairs are vertically arranged and distributed at four corners, and the rotation drive mechanism (110) is transmission-connected to the lead screws (130) of the four sets of lead screw pairs via the synchronous belt (120); Two cross bars (200), two ends of one cross bar (200) being connected to two screw nut seats (140) of two sets of screw pairs, and two ends of the other cross bar (200) being connected to two screw nut seats (140) of the other two sets of screw pairs; Two groups of scrapers (300) are respectively arranged on the two cross bars (200).

2. A scraper device according to claim 1, characterized in that: It also includes a tensioning mechanism (400), the tensioning mechanism (400) including a tensioning wheel (410) arranged between the four groups of the lead screw pairs, the synchronous belt (120) being wound around the tensioning wheel (410), and the tensioning wheel (410) being used to tension the synchronous belt (120).

3. A scraper device according to claim 2, characterized in that: The tensioning mechanism (400) further comprises a base plate (420), a sliding seat (430) and an adjusting member (440); the sliding seat (430) is slidably arranged on the base plate (420); the tensioning wheel (410) is arranged on the sliding seat (430); the adjusting member (440) is arranged on the base plate (420); the adjusting member (440) is connected to the sliding seat (430); and the adjusting member (440) is used to drive the sliding seat (430) to move so as to adjust the tension of the synchronous belt (120).

4. A scraper device according to claim 3, characterized in that: The adjusting member (440) is a first screw, the adjusting member (440) is threadedly connected to the base plate (420), one end of the adjusting member (440) is rotatably connected to the sliding seat (430), or the adjusting member (440) is rotatably connected to the base plate (420), one end of the adjusting member (440) is threadedly connected to the sliding seat (430).

5. A scraper device according to claim 3 or 4, characterized in that: The bottom plate (420) is provided with a guide limit groove (421), and the sliding seat (430) is provided with a limit member, and the limit member is passed through the guide limit groove (421) to limit the sliding seat (430) to slide on the bottom plate (420).

6. A scraper device according to claim 5, characterized in that: The guide limit groove (421) passes through the upper and lower surfaces of the bottom plate (420); the guide limit groove (421) is a stepped hole that is smaller at the top and larger at the bottom; the limit member is a second screw; the large end of the limit member is passed through the lower end of the guide limit groove (421); the small end of the limit member is passed through the upper end of the guide limit groove (421) and is threadedly connected to the sliding seat (430).

7. A scraper device according to claim 1, characterized in that: It also includes a mounting plate (500), the lower ends of the four guide pillars (150) of the four groups of the lead screw pairs are all arranged on the mounting plate (500), the lower ends of the four lead screws (130) are all extended to the bottom of the mounting plate (500) and are all connected to driven pulleys, the rotary drive mechanism (110) is arranged below the mounting plate (500), the output end of the rotary drive mechanism (110) is connected to a driving pulley, and the driving pulley is located between the four driven pulleys, and the synchronous belt (120) is wound around the driving pulley and the four driven pulleys.

8. A scraper device according to claim 1, characterized in that: One end of the cross bar (200) is hinged to the screw nut seat (140) of one group of the screw pairs, and the other end of the cross bar (200) is connected to the screw nut seat (140) of another group of the screw pairs via a fastener. A handle (210) is provided on the cross bar (200).

9. A screen printing device, characterized in that: It comprises a frame, a screen frame connecting mechanism, a workpiece clamping mechanism and a scraper device according to any one of claims 1 to 8, all of which are arranged on the frame, wherein the screen frame connecting mechanism is used to fix the screen frame, the workpiece clamping mechanism is used to fix the workpiece, and the scraper device is used to scrape the ink on the screen frame.

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