CN112874134B

CN112874134B - Plate collecting and releasing system of screen printing machine

Info

Publication number: CN112874134B
Application number: CN202110006251.0A
Authority: CN
Inventors: 陈祥力
Original assignee: Goal Searchers Co ltd Zhuhai
Current assignee: Goal Searchers Co ltd Zhuhai
Priority date: 2021-01-05
Filing date: 2021-01-05
Publication date: 2022-06-10
Anticipated expiration: 2041-01-05
Also published as: CN112874134A

Abstract

The invention discloses a screen printer retractable plate system, which comprises: the feeding frame is used for stacking and placing a plurality of PCB boards; the transfer positioning table comprises a base, a guide rod, a sliding supporting block and a fixed supporting block; the screen printing machine comprises a screen printing table top for positioning and placing the PCB; the blanking frame is provided with a plurality of vertical insertion grooves which are horizontally arranged at intervals; the carrying mechanism comprises a manipulator and a gripping device arranged on the manipulator, the gripping device can grip or release the PCB, and the manipulator can drive the gripping device to move back and forth between the transfer positioning table and the feeding frame, the screen printing table surface and the inserting groove. This receive and release board system can adapt to not unidimensional PCB board, guarantees that the position that the PCB board placed on the silk screen printing mesa at every turn is unified, and the printing precision is very high, because first support inclined plane and second support inclined plane only contact with the border of PCB board, can not be stained with the printing ink on the PCB board that the consent was accomplished, and whole process realizes the full automatization, and is very high-efficient.

Description

Plate collecting and releasing system of screen printing machine

Technical Field

The invention relates to the technical field of screen printing, in particular to a screen printing machine board collecting and releasing system.

Background

The screen printing technology or simply the screen printing technology has a long history and a mature automatic scheme, so the screen printing technology is widely applied to various industries and has higher requirements on printing precision.

Before the PCB is subjected to vacuum hole plugging, the position and the angle of the PCB transferred from the feeding frame are not uniform, so that the position difference of the PCB placed on the surface of a silk screen printing table is large, and a large amount of time is needed for aligning and adjusting the silk screen printing position; even if the screen printing table top is provided with the auxiliary positioning position of the PCB, the PCB is difficult to accurately place in the auxiliary positioning position when being moved, so that the production efficiency is low, and the printing precision is also influenced; in addition, the PCB subjected to vacuum hole plugging is required to be accurately inserted into the inserting groove of the blanking frame, so that a set of screen printing machine board collecting and placing system is urgently needed.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a screen printer board collecting and releasing system which can automatically collect and place the PCB in each link and can realize the function of accurate positioning.

The plate receiving and releasing system of the screen printing machine provided by the embodiment of the invention comprises the following components: the feeding frame is used for stacking and placing a plurality of PCB boards; the transfer positioning table comprises a base, a guide rod, a sliding support block and a fixed support block, wherein the guide rod is obliquely arranged on the base, the sliding support block is connected with the guide rod in a sliding manner, the sliding support block is provided with a first support inclined plane parallel to the axis of the guide rod, the fixed support block is arranged on the base and close to the lower end of the guide rod, and is provided with a second support inclined plane and a positioning inclined plane; the screen printing machine comprises a screen printing table top for positioning and placing the PCB; the blanking frame is provided with a plurality of vertical insertion grooves which are horizontally arranged at intervals; the carrying mechanism comprises a manipulator and a gripping device arranged on the manipulator, the gripping device can grip or release the PCB, and the manipulator can drive the gripping device to move back and forth between the transfer positioning table and the feeding frame, between the screen printing table surface and between the insertion grooves.

The method has the following beneficial effects: the board collecting and releasing system can adapt to PCBs of different sizes by arranging the transfer positioning table and adjusting the position of the sliding support block on the guide rod according to the length of the PCBs, the distance between the sliding support block and the positioning inclined plane is slightly smaller than the length of the PCBs, in the working process, the manipulator drives the gripping device to grip the PCBs stacked on the material loading frame one by one, the positions and the angles of the PCBs gripped each time are not uniform due to the stacked PCBs, once the PCBs are transferred and placed on the first supporting inclined plane and the second supporting inclined plane by the manipulator, the PCBs are supported by the first supporting inclined plane and the second supporting inclined plane in the same plane together, the lower end faces of the PCBs can be abutted on the positioning inclined planes by dead weight, the positioning inclined planes can effectively and accurately position the PCBs in the length direction, and then the PCBs can be transferred and taken away by the gripping device and transferred to the screen printing table board by the manipulator, guarantee that the PCB board places the position on the silk screen printing mesa unified at every turn, the printing precision is very high, treat that the vacuum consent is accomplished the back, the manipulator drives grabbing device again and shifts the PCB board to the transfer location bench and fix a position once more, because first support inclined plane and second support inclined plane only contact with the border of PCB board, can not be stained with the printing ink on the PCB board that the consent was accomplished, shift the PCB board to inserting the inslot again at last and air-dry and put, whole process realizes the full automatization, and is very high-efficient.

According to some embodiments of the invention, the gripping device comprises a mounting frame, a side clamp assembly, a supporting clamp assembly and a sucker assembly, the side clamp assembly is mounted at one end of the mounting frame relative to the first direction, the side clamp assembly comprises at least one pair of clamping jaws which are spaced along the third direction and are oppositely arranged, the pair of clamping jaws is used for clamping the PCB board along the third direction, the supporting clamp assembly is mounted at one end of the mounting frame relative to the third direction, the supporting clamp assembly comprises at least one pair of clamping units which are spaced along the second direction and are used for clamping the PCB board along the third direction, the sucker assembly is mounted at the other end of the mounting frame relative to the third direction, the sucker assembly comprises a plurality of suckers, the suckers are located in the same plane perpendicular to the third direction, the first direction, The second direction and the third direction are perpendicular to each other.

According to some embodiments of the invention, the screen printing table surface is provided with a first avoidance groove at the edge corresponding to the PCB, the clamping unit comprises a fixing clamp plate and an air cylinder, the fixing clamp plate can extend into the first avoidance groove, a piston rod of the air cylinder can extend and retract along the third direction to cooperate with the fixing clamp plate to clamp the PCB, and the fixing clamp plate is far away from the mounting frame in the third direction compared with the piston rod of the air cylinder.

According to some embodiments of the invention, the fixing support block is provided with a V-shaped groove, the V-shaped groove is defined by the second support inclined surface and the positioning inclined surface, the fixing support block is provided with a second avoiding groove below the V-shaped groove, and the second avoiding groove is communicated with the V-shaped groove.

According to some embodiments of the invention, the sliding support block is provided with a third avoidance groove at a position corresponding to the second avoidance groove.

According to some embodiments of the invention, the mounting bracket comprises a main bracket and two side brackets respectively mounted to both ends of the main bracket with respect to the second direction, each of the side brackets being adjustable in position with respect to the main bracket in the second direction.

According to some embodiments of the present invention, the clamping assembly includes four clamping units distributed in a matrix, two clamping units are disposed on one of the side brackets at intervals along the first direction, and the other two clamping units are disposed on the other side bracket at intervals along the first direction, and the clamping units are movable relative to the main bracket along the second direction.

According to some embodiments of the invention, some of the suction cups are mounted on the main support and the rest of the suction cups are mounted on the two side supports.

According to some embodiments of the invention, the main bracket is elastically connected with a main bottom plate, part of the suction cups are distributed on the main bottom plate, each side bracket is elastically connected with a side bottom plate, and the rest suction cups are distributed on two side bottom plates.

According to some embodiments of the invention, the side clamp assembly includes two pairs of said clamping jaws, wherein one pair of said clamping jaws and the other pair of said clamping jaws are spaced apart from each other along said second direction on said main support.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

FIG. 3 is a schematic structural diagram of a transfer positioning table according to an embodiment of the present invention;

FIG. 4 is a side view of a transfer table in an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a grasping device according to an embodiment of the present invention;

FIG. 6 is a front view of a grasping apparatus in an embodiment of the present invention;

FIG. 7 is a schematic view of a partial structure of a side clamp assembly for transferring a PCB board according to an embodiment of the present invention;

FIG. 8 is a partial schematic structural view of the bracket assembly and the chuck assembly transferring a PCB according to an embodiment of the present invention;

fig. 9 is a schematic structural view of a blanking frame in an embodiment of the present invention.

Reference numerals: the device comprises a PCB (printed circuit board) 1, a feeding rack 2, a transfer positioning table 3, a base 31, a guide rod 32, a sliding support block 33, a first support inclined surface 331, a third avoidance groove 332, a fixed support block 34, a second support inclined surface 341, a positioning inclined surface 342, a V-shaped groove 343, a second avoidance groove 344, a screen printing machine 4, a screen printing table 41, a first avoidance groove 42, a blanking rack 5, an insertion groove 51, a manipulator 6, a gripping device 7, a mounting rack 71, a main support 711, a side support 712, a main bottom plate 713, a side bottom plate 714, a side clamp assembly 72, a 721 clamping jaw, a bracket assembly 73, a clamping unit 731, a fixed clamping plate 7311, a cylinder 7312, a piston rod 7313, a sucker assembly 74 and a sucker 741.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to the orientation description, such as up, down, front, rear, left, right, first direction, second direction, third direction, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplicity of description, and does not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and more than, less than, more than, etc. are understood as excluding the present number, and more than, less than, etc. are understood as including the present number. If any description to first, second and third is only for the purpose of distinguishing technical features, it is not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.

Referring to fig. 1, the invention discloses a screen printer retracting plate system, which comprises a feeding frame 2, a transfer positioning table 3, a screen printer 4, a discharging frame 5 and a carrying mechanism.

Further refer to fig. 9, wherein, the material loading frame 2 is used for stacking the PCB boards 1 for waiting for vacuum hole plugging, the screen printer 4 comprises a screen printing table 41 for positioning and placing the PCB boards 1, the screen printer 4 is used for vacuum hole plugging of the PCB boards 1, the material unloading frame 5 is provided with a plurality of vertical inserting grooves 51, the inserting grooves 51 are horizontally arranged at intervals, the inserting grooves 51 can be inserted into the PCB boards 1 with completed hole plugging and used for airing the PCB boards 1, so that the printing ink on the PCB boards 1 is dried.

Referring further to fig. 3 and 4, the transfer positioning table 3 includes a base 31, a guide bar 32, a slide support block 33, and a fixed support block 34.

The guide rod 32 is obliquely arranged on the base 31, the sliding support block 33 is slidably connected with the guide rod 32, the sliding support block 33 is provided with a first support inclined surface 331 parallel to the axis of the guide rod 32, the fixed support block 34 is arranged on the base 31 near the lower end of the guide rod 32 and is provided with a second support inclined surface 341 and a positioning inclined surface 342, the second support inclined surface 341 and the first support inclined surface 331 are in the same plane, and the second support inclined surface 341 and the positioning inclined surface 342 are vertically intersected. The position of the sliding support block 33 on the guide rod 32 is adjusted according to the length of the PCB board 1, so that the distance between the sliding support block 33 and the positioning inclined plane 342 is slightly less than the length of the PCB board 1, and the sliding support block can adapt to PCB boards 1 of different sizes, and because the first support inclined plane 331 and the second support inclined plane 341 only contact with the edge of the PCB board 1, ink on the PCB board 1 with holes plugged can not be adhered.

In addition, the carrying mechanism comprises a manipulator 6 and a gripping device 7 arranged on the manipulator 6, the gripping device 7 can grip or release the PCB 1, the manipulator 6 can drive the gripping device 7 to move back and forth between the transfer positioning table 3 and the feeding frame 2, between the screen printing table 41 and between the inserting grooves 51, namely, the manipulator 6 can drive the gripping device 7 to move back and forth between the transfer positioning table 3 and the feeding frame 2, between the transfer positioning table 3 and the screen printing table 41 and between the transfer positioning table 3 and the inserting grooves 51.

This receive and release board system is in the course of the work, manipulator 6 drives grabbing device 7 earlier and snatchs PCB board 1 that stacks on the work or material rest 2 one by one, because PCB board 1 stacks and places, the position and the angle of the PCB board 1 of grabbing at every turn are not unified, in case PCB board 1 is shifted by manipulator 6 and is placed on first support inclined plane 331 and second support inclined plane 341, rely on first support inclined plane 331 and second support inclined plane 341 in the coplanar to support jointly, PCB board 1 can make its lower terminal surface support on location inclined plane 342 by the dead weight, location inclined plane 342 can carry out accurate location on length direction to PCB board 1 effectively, then can move again through grabbing device 7 and take away PCB board 1 and be shifted to silk screen printing mesa 41 by manipulator 6, guarantee that PCB board 1 is placed the position of 41 on the silk screen mesa at every turn unified, the printing precision is very high, treat that the vacuum consent is accomplished, manipulator 6 drives grabbing device 7 again and shifts PCB board 1 to location transfer to 3 and fix again and go on silk screen printing once again And finally, the PCB (printed circuit board) 1 is transferred into the inserting groove 51 and aired, so that the whole process is fully automatic and very efficient.

Referring further to fig. 5, in some embodiments of the present invention, the grasping apparatus 7 includes a mounting bracket 71, a side clamp assembly 72, a bracket assembly 73, and a suction cup assembly 74, wherein the side clamp assembly 72, the bracket assembly 73, and the suction cup assembly 74 can cooperate to transfer the PCB board 1 in division.

Referring to fig. 6 and 7, the first direction, the second direction and the third direction are perpendicular to each other, the side clamp assembly 72 is mounted at one end of the mounting bracket 71 with respect to the first direction, the side clamp assembly 72 includes at least one pair of clamping jaws 721 spaced and disposed opposite to each other along the third direction, the pair of clamping jaws 721 are used for clamping the PCB 1 along the third direction, the side clamp assembly 72 can clamp the PCB 1 on the transfer table 3, and the PCB is transferred to the discharging rack 5 by the manipulator 6 and inserted into the insertion slot 51.

Referring to fig. 1 and 8, the suction cup assembly 74 is mounted at the other end of the mounting frame 71 relative to the third direction, the suction cup assembly 74 includes a plurality of suction cups 741, the suction cups 741 are located in the same plane perpendicular to the third direction, the suction cup assembly 74 can suck the stacked PCB boards 1 on the feeding frame 2 one by one, the PCB boards are placed on the first supporting inclined plane 331 and the second supporting inclined plane 341 by the transfer of the manipulator 6, the PCB boards 1 are completely positioned, the suction cup assembly 74 sucks the PCB boards 1 again, and then the PCB boards 1 are transferred to the screen printing table 41 by the manipulator 6.

After the hole of the PCB 1 is plugged, the sucking disc assembly 74 is not convenient to reuse to suck the PCB 1 due to the fact that the areas of the PCB 1 except the edge are stained with ink, the sucking disc assembly 74 sucks the ink easily, and therefore the PCB 1 can be clamped by the supporting clamp assembly 73.

Referring to fig. 1 and 8, the bracket component 73 is mounted at one end of the mounting frame 71 relative to the third direction, the bracket component 73 includes at least one pair of clamping units 731 arranged at intervals along the second direction, the clamping units 731 are used for clamping the PCB 1 along the third direction, after the PCB 1 completes the hole plugging, the bracket component 73 can clamp the PCB 1 on the screen printing table 41 and is transferred and placed on the first supporting inclined plane 331 and the second supporting inclined plane 341 by the manipulator 6.

Referring to fig. 2, since the PCB 1 is attached to the screen printing table 41, considering that the bracket assembly 73 has a certain difficulty in clamping the PCB 1 on the screen printing table 41, and is easy to scratch the screen printing table 41 and the PCB 1, the screen printing table 41 is provided with a first avoiding groove 42 at a position corresponding to an edge of the PCB 1, the clamping unit 731 includes a fixing clamp plate 7311 and a cylinder 7312, the fixing clamp plate 7311 can extend into the first avoiding groove 42, a piston rod 7313 of the cylinder 7312 can extend and retract along a third direction to clamp the PCB 1 by matching with the fixing clamp plate 7311, the fixing clamp plate 7311 is far away from the mounting frame 71 in the third direction compared with the piston rod 7313 of the cylinder 7312, when the bracket assembly 73 works, the PCB 1 is horizontally placed on the screen printing table 41, the gripping device 7 shown in fig. 1 and 8 is turned over by 180 degrees, so that the third direction is a vertical direction, each pair of the clamping units 731 first moves outwards along the second direction (the left and right direction shown in fig. 1) relative to the mounting frame 71, then, the clamping unit 73 moves upwards for a short distance, so that the fixing clamping plate 7311 slightly supports the PCB 1, and then the cylinder 7312 drives the piston rod 7313 to extend out to press the edge of the PCB 1 against the fixing clamping plate 7311, so that the PCB 1 can be taken away without rubbing the screen printing table 41 and the PCB 1.

In addition, in order to facilitate the transfer of the PCB 1 transferred by the bracket clip assembly 73 on the transfer positioning table 3, the fixed supporting block 34 is provided with a V-shaped groove 343, the V-shaped groove 343 is surrounded by the second supporting inclined surface 341 and the positioning inclined surface 342, the second avoiding groove 344 is formed below the V-shaped groove 343 by the fixed supporting block 34, the second avoiding groove 344 is communicated with the V-shaped groove 343, the third avoiding groove 332 is formed at a position corresponding to the second avoiding groove 344 by the sliding supporting block 33, and the second avoiding groove 344 and the third avoiding groove 332 can avoid the fixed clamping plate 7311, so that the bracket clip assembly 73 can place the PCB 1 on the transfer positioning table 3 without obstacles.

In addition, referring to fig. 5 and 6, in some embodiments of the present invention, the mounting bracket 71 includes a main bracket 711 and two side brackets 712 respectively mounted at two ends of the main bracket 711 with respect to the second direction, and each of the side brackets 712 is adjustable in position with respect to the main bracket 711 in the second direction, specifically, manually adjustable, or automatically adjustable, for example, by a lead screw and nut mechanism to precisely adjust the position of the side bracket 712.

The supporting and clamping assembly 73 includes four clamping units 731 distributed in a matrix, as shown in fig. 8, two of the clamping units 731 are disposed on one of the side brackets 712 at intervals along the first direction, the other two clamping units 731 are disposed on the other side bracket 712 at intervals along the first direction, the clamping units 731 can move along the second direction relative to the main bracket 711, the four clamping units 731 can stably support and clamp the PCB board 1, and the supporting and clamping assembly 73 can support and clamp PCB boards 1 with different sizes because the positions of the side brackets 712 relative to the main bracket 711 in the second direction are adjustable.

Referring to fig. 6 and 8, in some embodiments of the present invention, some of the suction cups 741 are mounted on the main frame 711, the other suction cups 741 are mounted on the two side frames 712, the suction cups 741 on the side frames 712 are aligned in a first direction, and since the position of the side frames 712 relative to the main frame 711 in the second direction is adjustable, the position of the suction cups 741 on the side frames 712 can be adjusted to form a central and two-side synchronous suction manner, so that the suction cup assemblies 74 can suck PCB boards 1 with different sizes, and the suction manner using the suction cup assemblies 74 is particularly effective for the PCB boards 1 stacked on the loading frame 2.

In order to prevent the excessive impact force when the suction cups 741 are in contact with the PCB 1, referring to fig. 6, the main bracket 711 is elastically connected to the main bottom plate 713, part of the suction cups 741 are distributed on the main bottom plate 713, each side bracket 712 is elastically connected to the side bottom plate 714, and the rest of the suction cups 741 are distributed on the two side bottom plates 714, so that the suction cups 741 can be buffered when in contact with the PCB 1.

In some embodiments of the present invention, the side clamping assembly 72 includes two pairs of clamping jaws 721, wherein one pair of clamping jaws 721 and the other pair of clamping jaws 721 are disposed on the main bracket 711 at intervals along the second direction, and the two pairs of clamping jaws 721 can also stably clamp the PCB board 1, especially to facilitate inserting the PCB board 1 into the insertion slot 51 on the blanking frame 5.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.

Claims

1. Silk screen printing machine receive and releases board system, its characterized in that includes:

the feeding frame is used for stacking and placing a plurality of PCB boards;

the transfer positioning table comprises a base, a guide rod, a sliding support block and a fixed support block, wherein the guide rod is obliquely arranged on the base, the sliding support block is connected with the guide rod in a sliding manner, the sliding support block is provided with a first support inclined plane parallel to the axis of the guide rod, the fixed support block is arranged on the base and close to the lower end of the guide rod, and is provided with a second support inclined plane and a positioning inclined plane;

the screen printing machine comprises a screen printing table top for positioning and placing the PCB;

the blanking frame is provided with a plurality of vertical insertion grooves which are horizontally arranged at intervals;

the carrying mechanism comprises a manipulator and a gripping device arranged on the manipulator, the gripping device can grip or release the PCB, the manipulator can drive the gripping device to move back and forth between the transfer positioning table and the feeding frame, the screen printing table surface and the insertion groove, the gripping device comprises a mounting frame, a side clamping component, a supporting and clamping component and a sucker component, the side clamping component is arranged at one end of the mounting frame relative to a first direction, the side clamping component comprises at least one pair of clamping jaws which are arranged at intervals and oppositely along a third direction, the pair of clamping jaws are used for clamping the PCB along the third direction, the supporting and clamping component is arranged at one end of the mounting frame relative to the third direction, the supporting and clamping component comprises at least one pair of clamping units which are arranged at intervals along the second direction, and the clamping units are used for clamping the PCB along the third direction, the sucker component is arranged at the other end of the mounting rack relative to the third direction and comprises a plurality of suckers which are positioned in the same plane vertical to the third direction, the first direction, the second direction and the third direction are mutually perpendicular, the mounting frame comprises a main support and two side supports which are respectively arranged at two ends of the main support relative to the second direction, the position of each side support relative to the main support in the second direction is adjustable, the supporting and clamping assembly comprises four clamping units which are distributed in a matrix manner, wherein two clamping units are arranged on one side bracket at intervals along the first direction, the other two clamping units are arranged on the other side bracket at intervals along the first direction, and the clamping units can move along the second direction relative to the main bracket.

2. The system of claim 1, wherein the screen printing table top is provided with a first avoiding groove at the edge corresponding to the PCB, the clamping unit comprises a fixing clamp plate and a cylinder, the fixing clamp plate can extend into the first avoiding groove, a piston rod of the cylinder can extend along the third direction to cooperate with the fixing clamp plate to clamp the PCB, and the fixing clamp plate is used for comparing the piston rod of the cylinder to be far away from the mounting rack in the third direction.

3. The screen printing machine retracting plate system according to claim 2, wherein the fixed support block is provided with a V-shaped groove, the V-shaped groove is defined by the second support inclined surface and the positioning inclined surface, the fixed support block is provided with a second avoiding groove below the V-shaped groove, and the second avoiding groove is communicated with the V-shaped groove.

4. The screen printing machine retracting plate system according to claim 3, wherein the sliding support block is provided with a third avoiding groove at a position corresponding to the second avoiding groove.

5. The screen printing machine take-up and pay-off plate system as claimed in claim 1, wherein a portion of said suction cups are mounted on said main bracket, and the remaining suction cups are mounted on two of said side brackets.

6. The system of claim 5, wherein the main bracket is elastically connected with a main bottom plate, some of the suckers are distributed on the main bottom plate, each side bracket is elastically connected with a side bottom plate, and the rest suckers are distributed on two side bottom plates.

7. The screen printing machine retracting plate system of claim 1, wherein the side clamp assembly comprises two pairs of the clamping jaws, wherein one pair of the clamping jaws and the other pair of the clamping jaws are arranged on the main bracket at intervals along the second direction.