OLED metal mask stretching system using high performance tension gripper unit and pitch adjustment unit based on pattern induction automatic movement

Abstract

The present invention relates to an OLED metal mask stretching system using a high performance tension gripper unit and a pitch adjustment unit that automatically moves based on pattern induction. When the hinge block rotates with the main hinge shaft as the reference, the free end of the outer arm of the hinge block slides and moves along the inclined surface inclined piece of the angle block in a sliding manner, and the hinge block rotates with the main hinge shaft as the reference. The inclined block sides of the angle blocks are separated from each other or pressed and engaged with each other from the mounting protrusions of the lower arm through the front hinge, and meanwhile precise clamping is carried out. A pitch adjusting unit is arranged on one side of the bottom surface between the rails of the stretcher, not only is the tension gripper unit transferred and arranged at a set position according to the specification or stretching condition of the mask sheet, but also when the tension gripper unit is transferred and arranged, according to the mutual matching identification between the high-pattern sensor and the low-pattern sensor, the pitch adjusting unit adjusts the pitch of the tension gripper unit according to the matching identification between the high-pattern sensor and the low-pattern sensor; loading / unloading is formed at a set position and interval, so that alignment characteristics for a large-area mask can be precisely adjusted.

Description

Technical Field

[0001] The present invention relates to a pitch control unit using a high performance tension gripper unit and a pattern sensing auto-moving (encoder) based pitch control unit. The OLED metal mask stretching system of the present invention is characterized in that it is provided with a tension clamp unit and a pitch adjustment unit, thereby achieving the strengthening of the clamping force and the improvement of the stretching force of the large-area mask, and significantly improving the alignment precision; the tension clamp unit enables the hinge block relative to the corner block to implement the bite and release of the mask sheet, and when the hinge block rotates with the main hinge axis as the reference, the free end of the outer arm of the hinge block slides along the inclined inclined piece (angular displacement) of the corner block in a sliding manner, while the inclined block side of the corner block is spaced or squeezed and bitten from the placement protrusion of the lower arm through the front hinge, and precise clamping can be implemented at the same time; in particular, a pitch adjustment unit is provided on one side of the bottom surface between the tracks (long side tracks or short side tracks) of the stretcher, which not only actively transfers and sets the tension clamp unit at a set position according to the specifications of the mask sheet or the stretching conditions, but also realizes loading / unloading at a set position and interval according to the mutual matching and recognition between the high pattern sensor and the low pattern sensor when transferring and setting the tension clamp unit, so that the alignment characteristics for the large-area mask can be precisely adjusted.

[0002] Such a feature of the present invention is that it is possible to significantly improve manufacturability, precision, productivity, and economic efficiency. Background Art

[0003] Usually, OLED metal masks use Invar 36 material, and Invar raw materials are generally only produced in the 6th generation half-size (1040mm*coil winding).

[0004] That is, the existing Invar raw materials are difficult to cover the 8th generation metal mask (8th generation or 8.6th generation and a half) due to the size limitations of the original production.

[0005] On the one hand, some prior patents (Korean Patent Gazette No. 10-1891242) proposed a solution of splicing pattern masks of the 6th generation size to make a substrate mask, stretching the four sides with a stretcher, and then welding and joining them to the mask frame to make a series of evaporation masks.

[0006] However, the front part of the clamping module for stretching introduced in such a prior patent contacts the I-shaped right-angled surfaces at the top and bottom, so that when closing or opening by a hinge on one side, the corner part on one side (inner side) of the contacted surface is touched first, causing damage such as piercing the end of the mask sheet.

[0007] In addition, in the existing clamp, while causing deformation of the desired clamping position (based on the lower end of the open vise, the upper end vise touches while descending, starting from the inner corner portion generated by the angle to the end of the sheet, causing further tension and other distortion), excessive clamping force is only generated on one side of the end of the mask sheet, resulting in a defect of reduced overall bite, that is, low clamping force.

[0008] In addition, the conventional clamp has a hinge point for rotation disposed on the upper side of the vise, so the height of the vise needs to be designed to be too high, which hinders the design reflection space for the optical equipment or the accompanying transfer equipment arranged above the clamp.

[0009] In addition, when the existing clamp is clamped by the rear hinge, if excessive force is applied relative to the front hinge, the hinge axis will exceed 90°, and the front end of the front vise will open, causing the clamp to be released.

[0010] In addition, the existing clamps are integrally arranged on a table, resulting in low precision in tensile force control. In particular, when the equipment is shut down or reset, the position of each clamp needs to be reset individually. Therefore, there has long been a problem of long operation time and low precision.

[0011] Furthermore, in the existing clamp, the rear hinge engagement structure results in a low maximum engagement angle, and when the thickness of the mask sheet changes (50 to 300 microns), other devices must be installed, resulting in problems of low productivity and economy in the process.

[0012] Prior art literature

[0013] Patent Literature

[0014] (Patent Document 0001) 1. Korean Registered Patent Gazette No. 10-1891242 (registered on August 17, 2018) Summary of the invention

[0015] The present invention is used to solve the above-mentioned problems, and its purpose is to provide an OLED metal mask stretching system using a high-performance tension clamp unit and a pitch adjustment unit that automatically moves based on pattern sensing. The technical gist is that the tension clamp unit enables the hinge block relative to the corner block to engage and release the mask sheet. When the hinge block rotates with the main hinge axis as the reference, the free end of the outer arm of the hinge block slides along the inclined surface of the corner block (angular displacement) in a sliding manner, and at the same time, the inclined block side of the corner block is spaced or squeezed and engaged with each other from the placement protrusion of the lower arm through the front hinge, and precise clamping can be implemented at the same time.

[0016] The purpose of the present invention is to provide an OLED metal mask stretching system using a high-performance tension clamp unit and a pitch adjustment unit that automatically moves based on pattern sensing, wherein a pitch adjustment unit is provided on one side of the bottom surface between the tracks (long side track or short side track) of the stretcher, which not only actively transfers and sets the tension clamp unit at a set position according to the specifications or stretching conditions of the mask sheet, but also realizes loading / unloading at a set position and interval based on the mutual matching and recognition between the high pattern sensor and the low pattern sensor when transferring and setting the tension clamp unit, thereby being able to precisely adjust the alignment characteristics of large-area masks.

[0017] In addition, the purpose of the present invention is to provide an OLED metal mask stretching system using a high-performance tension clamp unit and a pitch adjustment unit that automatically moves based on pattern sensing. The tilting block hinge rotates while the inline block contacts the end of the mask sheet face to face. This not only solves the existing problem of stabbing the end of the sheet, but also can accurately clamp the set clamping point without position deformation. In particular, it can achieve an averaged and uniform clamping force on the end surface of the mask sheet, thereby greatly improving the overall bite.

[0018] In addition, the present invention aims to provide an OLED metal mask stretching system using a high-performance tension clamp unit and a pitch adjustment unit that automatically moves based on pattern sensing. The hinge point of the hinge block is applied downward, and the production height of the corner block becomes lower, which is conducive to creating an avoidance space for optical equipment or accompanying transfer equipment arranged above the clamp.

[0019] In addition, the present invention aims to provide an OLED metal mask stretching system using a high-performance tension clamp unit and a pitch adjustment unit that automatically moves based on pattern sensing, which can maintain the stability of the inclined block side even when the hinge block is vertically relative to the corner block during clamping (moved to close to 90°), thereby ensuring high clamping performance.

[0020] In addition, the purpose of the present invention is to provide an OLED metal mask stretching system using a high-performance tension clamp unit and a pitch adjustment unit that automatically moves based on pattern sensing. Through the downward rotating hinge structure of the tilting block and the inclined tilting piece transfer structure, the maximum bite angle has high variability. Therefore, when the thickness of the mask sheet changes (50 to 300 microns), active clamping can be achieved without setting up other equipment, thereby greatly improving productivity and economy in the process.

[0021] In other words, the present invention is characterized in that it can significantly improve manufacturability, precision, productivity, and economy.

[0022] In order to achieve such a purpose, the present invention includes: a tension clamp unit 100, in which the upper side of the front lower arm 131-1 of the clamp base 131 is combined with a corner block 140 through a front hinge 141, so as to implement the engagement and release of the mask sheet 10. When the hinge block 139-6 rotates with the main hinge shaft 139-8 as a reference, the outer arm free end 139-9 of the hinge block 139-6 slides along the inclined inclined piece 142 (angular displacement) of the corner block 140 in a sliding manner, and at the same time, the front inclined block 150 side of the corner block 140 is spaced or squeezed and engaged from the placement protrusion 131-2 of the lower arm 131-1 through the front hinge 141, and clamping is implemented at the same time; and a pitch adjustment unit 200, which is provided on one side between the rails 21 (long side rail or short side rail) of the stretcher 20, and the tension clamp unit 100 is transferred and set at a set position according to the specifications or stretching conditions of the mask sheet 10.

[0023] The tension clamp unit 100 includes: a main base 110, a frame 111 constituting four sides, an internal tensioning engine 112, a driving shaft of the tensioning engine 112 is combined with a screw 113, so that the transfer bracket 121 of the slider moves forward and backward through a lengthwise stroke, and a rail 114 is formed on the upper side of the frame 111. When the transfer bracket 121 moves forward and backward through the tensioning engine 112, the platform 122 of the slider moves forward and backward through the transfer area 123; the slider 120, the transfer bracket 121 and the transfer area 123 are combined at the lower part of the platform 122 installed on the rail 114, respectively corresponding to the screw 113 and the rail 114, and move forward and backward in the lengthwise direction, and stretch the mask sheet at the same time; and a clamping part 130, a clamping base 131 is installed and combined with one side of the upper part of the platform 122 of the slider 120, and the rear end of the clamping base 131 is installed with the tensioning engine 1 12 linkage, and can measure the tensile strength of the load sensor assembly 133; the driving shaft 134 of the clamp engine 132 is combined with a pressure plate 136 that passes through the housing block 135 and branches downward. As the driving shaft 134 rotates, it moves axially forward and backward in a ball screw manner; a moving block 137 and a nut block 138 are built into the housing block 135; a coil spring 139 is built between the internal spaces of the moving block 137 and the nut block 138, so as to maintain the pressurization elasticity (the force pushing toward the hinge block side) based on the shaft 139-1; the lower side of the moving block 137 is combined with a sub-bracket 139-2; one side end of the sub-bracket 139-2 is combined with a linkage link 139-4 that rotates based on the driving hinge 139-3; the linkage link 139-4 forms a sub-hinge 139-5 at the end of the branch, and is connected to the linkage hinge hole 139-7 of the hinge block 139-6.

[0024] At this time, the load sensor assembly 133 is formed with a tension block 133-3 at the front end of the fixing fixture 133-2 on which the load sensor 133-1 is installed, and one side of the measuring part of the load sensor 133-1 is threadedly fastened, and the rear end of the fixing fixture 133-2 is supported and fixed with the first elastic body 133-4, the fixing nut 133-5 and the first shaft 133-6 at the first guide block 133-7, and there is a load end bearing housing between the load sensor 133-1 and the fixing nut 133-5. 133-8, and is connected to the hinge pin 122-1 at the rear end of the table 122. The front of the tension block 133-3 passes through the second guide block 133-9, and the branched second axis 133-91 is supported and fixed by the second elastic body 133-92 and the fixed plate 133-93. When the second guide block 133-9 and the rear end connecting plate 131-3 of the clamp base 131 are combined and the mask sheet 10 is stretched, the load sensor 133-1 can measure the tensile strength and digitize it at the same time.

[0025] Therefore, the tension clamp unit 100 is formed with a non-slider 170 having a high pattern sensor 160 for identification and a retaining member 171 for movement termination on the lower side of the frame 111, and the pitch adjustment unit 200 is formed with a moving shaft 210 having a transfer interval in a direction perpendicular to the clamping direction of the tension clamp unit 100, and an upper and lower cylinder 220 is installed on the upper side of the moving shaft 210, and a lifting block 230 is installed at the end of the operating rod of the upper and lower cylinder 220, so that it can be raised and lowered according to the signal, and the center of the lifting block 230 is equipped with a low pattern sensor 240, which corresponds to the high pattern sensor 160 with the same pattern recognition, and is loaded / unloaded and transferred up and down according to the selected position and interval.

[0026] In addition, the non-slider 170 is installed on the upper side of the reference block 250 (a box body that wraps the movable shaft, upper and lower cylinders, lifting block and low pattern sensor) of the pitch adjustment unit 200, and an elastic spring 172, a lifting bushing 173 and a rod pin 174 are built into one side and the other side of the main body of the non-slider 170 (because the non-slider usually pushes the reference block through an elastic spring, the clamper base does not move).

[0027] Thus, a coating layer for improving the friction coefficient is formed on the upper end surface of the reference block 250, thereby ensuring a large friction resistance with the non-sliding block 170 (preventing movement due to external force).

[0028] In addition, in the tilting block 150, a hinge area 152 is formed on the upper side of the pressing plate 151, which can keep the bottom surface of the tilting block in a vertical state at all times while ensuring the leading surface contact state with the end of the mask sheet 10, thereby increasing the pressure clamping force (preventing sheet damage).

[0029] At this time, the lower arm 131-1 and the corner block 140 are respectively formed with inner grooves 180 on the opposite sides, and a spring 181 is built in between the inner grooves. At the same time, the placement protrusion 131-2 of the tilting block 150 and the lower arm 131-1 is always in an open state (pre-initial clamping state).

[0030] In addition, the moving block 137 and the nut block 138 are formed as short circular plates, are built into the circular space portion of the housing block 135, and are smoothly guided to slide based on the longitudinal stroke.

[0031] Preferably, the free end 139 - 9 of the outer arm of the hinge block 139 - 6 is formed in a hemispherical shape, and is easy to slide when corresponding to the inclined surface inclined member 142 of the corner block 140 .

[0032] As described above, the present invention is provided with a tension clamp unit and a pitch adjustment unit, thereby achieving the strengthening of the clamping force and the improvement of the stretching force for the large-area mask, and significantly improving the alignment precision. The tension clamp unit enables the hinge block relative to the corner block to implement the engagement and release of the mask sheet. When the hinge block rotates with the main hinge axis as the reference, the free end of the outer arm of the hinge block slides along the inclined inclined member (angle displacement) of the corner block in a sliding manner, while the inclined block side of the corner block is spaced or squeezed and engaged from the placement protrusion of the lower arm through the front hinge, and precise clamping is implemented at the same time. In particular, a pitch adjustment unit is provided on one side of the bottom surface between the tracks (long side tracks or short side tracks) of the stretcher, which not only actively transfers and sets the tension clamp unit at a set position according to the specifications of the mask sheet or the stretching conditions, but also realizes loading / unloading at a set position and interval according to the mutual matching recognition between the high pattern sensor and the low pattern sensor when transferring and setting the tension clamp unit, so that the alignment characteristics for the large-area mask can be precisely adjusted.

[0033] In addition, in the present invention, the tilting block hinge rotates and contacts the end of the mask sheet in a straight line face to face. This not only solves the existing problem of piercing the end of the sheet, but also can accurately clamp the set clamping point without position deformation. In particular, it can achieve an averaged and uniform clamping force on the end surface of the mask sheet, thereby greatly improving the overall bite.

[0034] In addition, in the present invention, since the hinge point of the hinge block is applied downward, the manufacturing height of the corner block becomes low, which is conducive to creating an avoidance space for the optical equipment or the accompanying transfer equipment arranged above the clamper.

[0035] In addition, in the present invention, even if the hinge block is perpendicular to the corner block (moved to nearly 90°) during clamping, the stability of the inclined block side can still be maintained, thereby ensuring high clamping performance.

[0036] In addition, the present invention has a high variability in the maximum engagement angle through the downward rotating hinge structure of the tilting block and the inclined tilting piece transfer structure. Therefore, when the thickness of the mask sheet changes (50 to 300 microns), active clamping can be achieved without setting up other equipment, thereby greatly improving productivity and economy in the process. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 An exemplary diagram showing an OLED metal mask stretching system using a high-performance tension gripper unit and a pitch adjustment unit based on pattern sensing automatic movement (encoder) according to the present invention;

[0038] Figure 2 for Figure 1 Floor plan of

[0039] Figure 3-4 An exemplary diagram showing a tension clamp unit and a pitch adjustment unit according to the present invention;

[0040] Figure 5-8 An exemplary diagram showing a tension clamp unit according to the present invention;

[0041] Figure 9-12 FIG. 1 is a diagram showing an example of a pitch adjustment unit according to the present invention.

[0042] Description of Reference Numerals

[0043] 10: Mask sheet 20: Stretcher

[0044] 21: Track

[0045] 100: Tension clamp unit 110: Main base

[0046] 111: Frame 112: Stretching Engine

[0047] 113: screw 114: rail

[0048] 120: Slider 121: Transfer bracket

[0049] 122: Table 122-1: Hinge pin

[0050] 123: Transfer Area

[0051] 130: Clamping part 131: Clamping device base

[0052] 131-1: Lower arm 131-2: Placement protrusion

[0053] 131-3: Rear connection plate

[0054] 132: Gripper engine 133: Load sensor assembly

[0055] 133-1: Load sensor 133-2: Fixing fixture

[0056] 133-3: tension block 133-4: first elastic body

[0057] 133-5: Fixing nut 133-6: First shaft

[0058] 133-7: First guide block 133-8: Load end bearing housing

[0059] 133-9: Second guide block 133-91: Second axis

[0060] 133-92: Second elastic body 133-93: Fixed plate

[0061] 134: driving shaft 135: housing block

[0062] 136: Pressure plate 137: Moving block

[0063] 138: Nut block 139: Coil spring

[0064] 139-1: shaft 139-2: auxiliary bracket

[0065] 139-3: Driving hinge 139-4: Linkage link

[0066] 139-5: Secondary hinge 139-6: Hinge block

[0067] 139-7: Linkage hinge hole 139-8: Main hinge axis

[0068] 139-9: Free end of outer arm

[0069] 140: Corner block 141: Front hinge

[0070] 142: Inclined surface tilting piece 150: Tilt block

[0071] 151: Pressing plate 152: Hinge area

[0072] 160: High pattern sensor 170: Non-slider

[0073] 171: retaining member 172: elastic spring

[0074] 173: Lifting bushing 174: Lever pin

[0075] 180: Inner groove 181: Spring

[0076] 200: Pitch adjustment unit 210: Moving axis

[0077] 220: Up and down cylinders 230: Lifting block

[0078] 231: V-groove retainer

[0079] 240: Low pattern sensor 250: Reference block DETAILED DESCRIPTION

[0080] Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

[0081] like Figure 1-12 As shown, the present invention mainly includes a tension clamper unit 100 and a pitch adjustment unit 200 .

[0082] First, in the tension clamper unit 100 , the upper side of the front lower arm 131 - 1 of the clamper base 131 is connected to the corner block 140 via the front hinge 141 , so that the mask sheet 10 can be engaged or released.

[0083] That is, in the tension clamp unit 100, when the hinge block 139-6 rotates with the main hinge shaft 139-8 as a reference, the free end 139-9 of the outer arm of the hinge block 139-6 slides along the inclined surface inclined member 142 (angular displacement) of the corner block 140, and at the same time, the front inclined block 150 side of the corner block 140 is spaced or squeezed and engaged with each other from the placement protrusion 131-2 of the lower arm 131-1 through the front hinge 141, and clamping is implemented at the same time.

[0084] At this time, the tension clamper unit 100 mainly includes a main base 110 , a slider 120 and a clamping portion 130 .

[0085] In the main base 110, a stretching motor 112 is provided inside a frame 111 constituting four sides. The driving shaft of the stretching motor 112 is combined with a screw 113 to move the transfer bracket 121 of the slider forward and backward through a lengthwise stroke.

[0086] At this time, a rail 114 is formed on the upper side of the frame 111. When the transfer bracket 121 moves forward and backward through the stretching engine 112, the platform 122 of the slider moves forward and backward at the same time through the transfer area 123.

[0087] Then, in the slider 120, the transfer bracket 121 and the transfer area 123 are combined at the lower part of the platform 122 installed on the rail 114, and respectively correspond to the screw rod 113 and the rail 114, and move forward and backward in the length direction at the same time, and the mask sheet is stretched.

[0088] In the clamping part 130, the clamper base 131 is installed and combined with the upper side of the platform 122 of the slider 120, and the driving shaft 134 of the clamper engine 132 is combined with a pressure plate 136 that penetrates the shell block 135 and branches downward. As the driving shaft 134 rotates, it moves axially forward and backward in a ball screw manner.

[0089] At this time, the housing block 135 has a movable block 137 and a nut block 138 built therein, and a coil spring 139 is built between the inner spaces of the movable block 137 and the nut block 138, thereby maintaining pressurized elasticity (force pushing toward the hinge block) based on the axis 139-1.

[0090] A sub-bracket 139 - 2 is coupled to the lower side of the moving block 137 , and a linkage link 139 - 4 that rotates based on the driving hinge 139 - 3 is coupled to one end of the sub-bracket 139 - 2 .

[0091] At this time, the linkage link 139-4 is formed with a secondary hinge 139-5 at the end of the branch, so as to be connected to the linkage hinge hole 139-7 of the hinge block 139-6.

[0092] In addition, in the tilting block 150, a hinge area 152 is formed on the upper side of the pressing plate 151, so that the bottom surface of the tilting block can always be kept in a vertical state, while ensuring the leading surface contact state with the end of the mask sheet 10, thereby improving the pressurized clamping force (preventing sheet damage).

[0093] At this time, the lower arm 131-1 and the corner block 140 are respectively formed with inner grooves 180 on the opposite sides, and a spring 181 is built in between the inner grooves. At the same time, the placement protrusion 131-2 of the tilting block 150 and the lower arm 131-1 is always in an open state (pre-initial clamping state).

[0094] The moving block 137 and the nut block 138 are formed as short circular plates, and are built into the circular space of the housing block 135 , and are smoothly guided to slide based on the longitudinal stroke.

[0095] Preferably, the free end 139 - 9 of the outer arm of the hinge block 139 - 6 is formed in a hemispherical shape, and is easy to slide when corresponding to the inclined surface inclined member 142 of the corner block 140 .

[0096] Furthermore, a load cell assembly 133 is mounted on the rear end of the clamper base 131 so as to work in conjunction with the tension motor 112 and to measure the tension strength.

[0097] At this time, in the load sensor assembly 133, a tension block 133-3 is formed at the front end of the fixing clamp 133-2 on which the load sensor 133-1 is installed, a threaded fastening is formed on one side of the measuring part of the load sensor 133-1, and the first elastomer 133-4, the fixing nut 133-5 and the first shaft 133-6 are supported and fixed to the first guide block 133-7 at the rear end of the fixing clamp 133-2.

[0098] A load-end bearing housing 133-8 is provided between the load sensor 133-1 and the fixing nut 133-5 and is connected to the hinge pin 122-1 at the rear end of the platform 122.

[0099] At this time, the front of the tension block 133-3 passes through the second guide block 133-9, and the branched second axis 133-91 is supported and fixed by the second elastic body 133-92 and the fixed plate 133-93, and the second guide block 133-9 is combined with the rear end connecting plate 131-3 of the clamp base 131. When the mask sheet 10 is stretched, the load sensor 133-1 can measure the tensile strength and digitize it at the same time.

[0100] The following will describe the operational relationship of the present invention based on the above-mentioned structure.

[0101] First, in the initial pre-clamping state, the pressure plate 136 (the state of approaching the clamper engine side) is moved backward by the driving shaft 134 close to the clamper engine 132 side, and the free end of the outer arm of the hinge block moves toward the low angle side of the inclined surface tilting member, and the inclined block side of the angle block 140 with the front hinge 141 as the reference opens from the placement protrusion of the lower arm 131-1.

[0102] At this time, the lower arm 131-1 and the corner block 140 are respectively formed with inner grooves 180 on the opposite sides, and a spring 181 is built in between the inner grooves. At the same time, the placement protrusion 131-2 of the tilting block 150 and the lower arm 131-1 is always in an open state (pre-initial clamping state).

[0103] At this time, when the clamping operation is performed, the clamper motor is driven and the drive shaft is rotated, and the pressure plate moves toward the corner block side (moves to the left in the figure) by the ball screw method.

[0104] Thereafter, a guide plate penetrating the housing block is formed on the upper side of the pressure plate so as to push the moving block and the nut block.

[0105] At this time, an axis 139-1 is formed in a direction perpendicular to the guide plate, and the axis 139-1 places the coil spring 139 on the outer peripheral surface and leads it into the center of its axis. One end of the axis 139-1 is coupled to the guide plate, and the other end is coupled to the nut block 138 located at the outermost side (the leftmost side in the drawing) among the nut blocks 138, while the coil spring 139 applies an elastic force that pushes toward the corner block side.

[0106] That is, when the pressure plate uses the axis as a reference to make the coil spring push the moving block 137 and the nut block 138, the auxiliary bracket coupled to the lower end of the moving block simultaneously moves toward the angle block side, and at the same time rotates the linkage link 139-4 based on the driving hinge 139-3.

[0107] Thereafter, while the linkage link 139-4 pushes out the linkage hinge hole 139-7 combined with the secondary hinge 139-5, the hinge block 139-6 moves the free end of the outer arm of the hinge block along the inclined surface of the inclined surface inclined member to a high angle based on the main hinge axis.

[0108] At this time, in order to keep the placement protrusion and the tilting block spaced apart at all times, the expanded spring is accommodated in the respective inner grooves on the upper and lower sides while expanding and contracting.

[0109] As a result, the free end of the outer arm of the hinge block of the ramp tilting member can ensure a stable clamping force even in a state not exceeding 90° from the vertical reference, and the moving block and the nut block moving in the cylindrical housing block ensure smooth operability.

[0110] In particular, the tilting block forms a hinge area 152 on the upper side of the pressing plate 151, so that the bottom surface of the tilting block can always remain in a vertical state while ensuring the leading surface contact state with the end of the mask sheet 10, thereby increasing the pressure clamping force (preventing damage to the sheet).

[0111] After that, when the clamping is completed, the stretching motor 112 is driven, and at the same time, the transfer bracket 121 coupled to the screw 113 moves backward through the length direction stroke. That is, the mask sheet is pulled and moved backward (the slider moves to the right in the figure).

[0112] That is, a rail 114 is formed on the upper side of the frame 111 , and when the transfer bracket 121 is moved backward by the stretching motor 112 , the platform 122 of the slider is moved backward while being linked by the transfer area 123 .

[0113] In other words, the slider 120 is formed as follows: in a state where the clamping is completed according to the structure of the tilting block, etc., the transfer bracket 121 and the transfer area 123 installed on the rail 114 make the screw 113 and the rail 114 retreat in the length direction (the slider moves to the right in the figure), and at the same time, the mask sheet is stretched.

[0114] At this time, a load cell assembly 133 capable of measuring the tensile strength while working in conjunction with the tensile motor 112 is mounted on the rear end of the clamper base 131 .

[0115] That is, in the load sensor assembly 133, a tension block 133-3 is formed at the front end of the fixing clamp 133-2 on which the load sensor 133-1 is installed, one side of the measuring part of the load sensor 133-1 is threadedly fastened, and at the rear end of the fixing clamp 133-2, the first elastic body 133-4, the fixing nut 133-5 and the first shaft 133-6 are supported and fixed to the first guide block 133-7.

[0116] Thus, a load-end bearing housing 133 - 8 is provided between the load sensor 133 - 1 and the fixing nut 133 - 5 , thereby being connected to the hinge pin 122 - 1 at the rear end of the table 122 .

[0117] At this time, the second axis 133-91 that passes through the second guide block 133-9 in front of the tension block 133-3 and branches out is supported and fixed by the second elastic body 133-92 and the fixing plate 133-93. When the second guide block 133-9 and the rear end connecting plate 131-3 of the clamp base 131 are combined and the mask sheet 10 is stretched, the load sensor 133-1 can measure the tensile strength and digitize it at the same time.

[0118] On the other hand, the pitch adjustment unit 200 is provided between the rails 21 (long side rails or short side rails) of the stretcher 20 , and transfers and sets the tension clamper unit 100 at a set position according to the specification or stretching conditions of the mask sheet 10 .

[0119] For reference, the tension clamp unit 100 is formed with a non-slider 170 having a high pattern sensor 160 for position recognition and a retaining member 171 for movement termination on the lower side of the frame 111, and the pitch adjustment unit 200 is formed with a moving axis 210 having a transfer section along a direction perpendicular to the clamping direction of the tension clamp unit 100.

[0120] At this time, an up-and-down cylinder 220 is installed on the upper side of the moving shaft 210, and a lifting block 230 is installed at the end of the operating rod of the up-and-down cylinder 220, so that it can be raised and lowered according to the signal.

[0121] The lifting block 230 is provided with a low pattern sensor 240 in the center, and corresponds to the high pattern sensor 160 with the same pattern sensing, and loads / unloads and transfers up and down according to the selected position and interval.

[0122] That is, the low pattern sensor 240 and the high pattern sensor 160 provide information on the number or printed value that can identify the corresponding patterns, so that the encoder value is maintained when the equipment itself is shut down or reset, and is automatically configured to the set position according to the respective recognized values.

[0123] For reference, in the prior art, when the clamp is formatted, the position needs to be reset. At this time, the encoder values ​​of the actuators of the existing clamp are reset, and the position needs to be manually reset again. This existing method requires individual settings one by one, which is very time-consuming and the problem of reduced precision persists.

[0124] On the one hand, a V-groove retainer 231 is formed on the top of the lifting block, which can perform smooth linear movement when the retainer 171 corresponding to the non-slider 170 is transferred along the track (the concave and convex locking protrusions that drive the pattern recognition to the set position along the track work).

[0125] That is, for any one of the plurality of gripper units 100 , the V-groove retainer 231 can correspond to the insertion angle of the retainer 171 , and can be aligned at the same position.

[0126] In addition, the non-slider 170 is installed on the upper side of the reference block 250 (a box body that wraps the movable shaft, upper and lower cylinders, lifting block and low pattern sensor) of the pitch adjustment unit 200, and an elastic spring 172, a lifting bushing 173 and a rod pin 174 are built into one side and the other side of the main body of the non-slider 170 (since the non-slider pushes the reference block through an elastic spring, the clamper base does not move).

[0127] That is, the spring keeps the non-slider (close to the set position) pushing the reference block (pressing downward). When the lifting block rises or falls, the spring expands and contracts, and slightly lifts the non-slider. Then the rod pin is lifted through the center hole in the bushing, allowing smooth lengthwise movement on the track.

[0128] The reference block 250 has a coating formed on its upper end surface to increase the friction coefficient, thereby ensuring greater friction resistance with the non-sliding block 170 (preventing movement due to external forces / increasing the friction coefficient by the surface coating to prevent slipping).

[0129] The present invention is not limited to the above-mentioned specific preferred embodiments, and anyone having ordinary knowledge in the technical field to which the invention belongs can implement various modifications without departing from the spirit of the present invention as claimed in the claims, and these modifications are also within the scope of the claims.

Claims

1. An OLED metal mask stretching system using a high-performance tension gripper unit and a pitch adjustment unit based on pattern sensing automatic movement, characterized in that, The system includes: A tension clamp unit (100), wherein the upper side of the front lower arm (131-1) of the clamp base (131) is connected to a corner block (140) through a front hinge (141), thereby implementing engagement and release of the mask sheet (10); when the hinge block (139-6) rotates with the main hinge shaft (139-8) as a reference, the outer arm free end (139-9) of the hinge block (139-6) slides along the inclined surface inclined piece (142) of the corner block (140) in a sliding manner, while the front inclined block (150) side of the corner block (140) is spaced or squeezed and engaged from the placement protrusion (131-2) of the lower arm (131-1) through the front hinge (141), thereby implementing clamping; and The pitch adjustment unit (200) is provided on one side between the rails (21) of the stretcher (20), and is used to transfer and set the tension clamp unit (100) at a set position according to the specification or stretching conditions of the mask sheet (10).

2. The OLED metal mask stretching system using a high-performance tension gripper unit and a pitch adjustment unit based on pattern sensing automatic movement according to claim 1, characterized in that, The tension clamp unit (100) comprises: The main base (110) is provided with a stretching engine (112) inside a frame (111) which forms four frames. The driving shaft of the stretching engine (112) is combined with a screw (113) to enable the transfer bracket (121) of the slider to move forward and backward through a lengthwise stroke. A rail (114) is formed on the upper side of the frame (111). When the transfer bracket (121) moves forward and backward through the stretching engine (112), the platform (122) of the slider moves forward and backward simultaneously through the transfer area (123). The slider (120), the transfer bracket (121) and the transfer area (123) are combined at the lower part of the platform (122) installed on the rail (114), respectively corresponding to the screw rod (113) and the rail (114), and move forward and backward in the length direction, while stretching the mask sheet; and The clamping part (130) is provided with a clamping base (131) mounted on one side of the upper part of the platform (122) of the slider (120). The driving shaft (134) of the clamping engine (132) is combined with a pressure plate (136) which penetrates the housing block (135) and branches downward. As the driving shaft (134) rotates, the clamping engine (132) moves forward and backward axially in a ball screw manner. The housing block (135) is provided with a moving block (137) and a nut block (138). The moving block (137) and the nut block (138) are A coil spring (139) is built into the internal space to maintain pressurized elasticity based on the axis (139-1). The lower side of the moving block (137) is combined with a sub-bracket (139-2). One end of the sub-bracket (139-2) is combined with a linkage link (139-4) that rotates based on the driving hinge (139-3). The linkage link (139-4) is formed with a sub-hinge (139-5) at the end of the branch and is connected to the linkage hinge hole (139-7) of the hinge block (139-6).

3. The OLED metal mask stretching system using a high-performance tension gripper unit and a pitch adjustment unit based on pattern sensing automatic movement according to claim 2, characterized in that, A load sensor assembly (133) is installed at the rear end of the clamp base (131) and is linked to the tensile engine (112) and can measure the tensile strength. The load sensor assembly (133) is formed with a tension block (133-3) at the front end of a fixing fixture (133-2) on which the load sensor (133-1) is installed. One side of the measuring part of the load sensor (133-1) is threadedly fastened. The rear end of the fixing fixture (133-2) is supported and fixed with a first elastic body (133-4), a fixing nut (133-5) and a first shaft (133-6) at a first guide block (133-7). The load sensor (133-1) is fixed to the first guide block (133-7). A load-end bearing housing (133-8) is provided between the support nut (133-1) and the fixing nut (133-5), and is connected to the hinge pin (122-1) at the rear end of the platform (122); the front of the tension block (133-3) passes through the second guide block (133-9), and the branched second shaft (133-91) is supported and fixed by the second elastic body (133-92) and the fixing plate (133-93); when the second guide block (133-9) and the rear end connecting plate (131-3) of the clamp base (131) are combined and the mask sheet (10) is stretched, the load sensor (133-1) can measure the tensile strength and perform data conversion at the same time.

4. The OLED metal mask stretching system using a high-performance tension gripper unit and a pitch adjustment unit based on pattern sensing automatic movement according to claim 3, characterized in that, The tension clamper unit (100) is formed with a non-slider (170) having a high pattern sensor (160) for identification and a holder (171) for movement termination on the lower side of the frame (111); The pitch adjustment unit (200) is formed with a moving shaft (210) having a transfer interval along a direction perpendicular to the clamping direction of the tension clamp unit (100), and an upper and lower cylinder (220) is installed on the upper side of the moving shaft (210), and a lifting block (230) is installed at the end of the operating rod of the upper and lower cylinder (220), so that it can be raised and lowered according to the signal, and the center of the lifting block (230) has a low pattern sensor (240), which corresponds to a high pattern sensor (160) with the same pattern recognition, and is loaded / unloaded and transferred up and down according to the selected position and interval.

5. The OLED metal mask stretching system using a high-performance tension gripper unit and a pitch adjustment unit based on pattern sensing automatic movement according to claim 4, characterized in that, The non-slider (170) is installed on the upper side of the reference block (250) of the pitch adjustment unit (200), and an elastic spring (172), a lifting bushing (173) and a rod pin (174) are built into one side and the other side of the main body of the non-slider (170).

6. The OLED metal mask stretching system using a high-performance tension gripper unit and a pitch adjustment unit based on pattern sensing automatic movement according to claim 5, characterized in that, The reference block (250) has a coating layer formed on the upper end surface for improving the friction coefficient, thereby ensuring greater friction resistance with the non-sliding block (170).

7. The OLED metal mask stretching system using a high-performance tension gripper unit and a pitch adjustment unit based on pattern sensing automatic movement according to claim 6, characterized in that, The tilting block (150) is formed with a hinge area (152) on the upper side of the pressing plate (151), which can keep the bottom surface of the tilting block in a vertical state while ensuring the leading surface contact state with the end of the mask sheet (10), thereby improving the pressurized clamping force.

8. The OLED metal mask stretching system using a high-performance tension gripper unit and a pitch adjustment unit based on pattern sensing automatic movement according to claim 7, characterized in that, The lower arm (131-1) and the corner block (140) are respectively formed with inner grooves (180) on the sides opposite to each other, and a spring (181) is built in between the inner grooves. At the same time, the tilting block (150) and the placement protrusion (131-2) of the lower arm (131-1) are always in an open state.

9. The OLED metal mask stretching system using a high-performance tension gripper unit and a pitch adjustment unit based on pattern sensing automatic movement according to claim 8, characterized in that, The moving block (137) and the nut block (138) are formed as circular short plates, are built into the circular space portion of the housing block (135), and are smoothly guided to slide based on the longitudinal stroke.

10. The OLED metal mask stretching system using a high performance tension gripper unit and a pitch adjustment unit based on pattern sensing automatic movement according to claim 1, characterized in that, The free end (139-9) of the outer arm of the hinge block (139-6) is formed in a hemispherical shape, and is easy to slide when corresponding to the inclined surface inclined member (142) of the corner block (140).

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