A device for leveling the plastic and iron in the backlight source of liquid crystal display

Abstract

The present invention relates to the field of mechanical equipment technology, and in particular to a glue iron material leveling device in a liquid crystal display backlight source, comprising a machine body, an upper guide roller, a lower guide roller and two pressure rollers, wherein the machine body is fixedly arranged, and the upper guide roller and the lower guide roller are used to extrude a sheet material and convey the sheet material along a first direction; the two pressure rollers are horizontally arranged on the machine body, and the extension direction of the axes of the two pressure rollers is inclined relative to the first direction, and the intersection of the two pressure rollers is located on the vertical plane where the mid-perpendicular line of the axis of the lower guide roller is located; in the direction in which the sheet material advances, the ends of the two pressure rollers that are close to each other are located in front of the ends that are far away from each other, and both pressure rollers can abut against the sheet material. When the pressure rollers rotate to drive the sheet material to advance on the lower guide roller, the two pressure rollers will respectively apply two forces that are opposite and pull the sheet material outward, so that the inclined or non-centered sheet material is centered on the lower guide roller, and the angle at which the sheet material enters between the upper guide roller and the lower guide roller is corrected, thereby improving the leveling effect of the sheet material.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical equipment, in particular to a glue-iron material taking and leveling device in a liquid crystal display backlight source. Background Art

[0002] In the production of LCD modules, the quality of the backlight source's main body's iron and glue has a crucial impact on the performance of the entire module. The metal plate part of the iron and glue is even more critical, as it provides support for the structural stability and functional realization of the backlight source.

[0003] In the actual production and transportation process, metal plates are very likely to bend due to various factors such as handling collision, vibration and its own gravity. Therefore, it is an essential step to level the metal plates in the early stage of the production of rubber iron.

[0004] The leveling machine is a processing equipment used to level uneven metal sheets. It extrude metal sheets of a certain thickness through upper and lower rollers to eliminate the raised or depressed parts formed on the surface of the metal sheets during the initial processing, so that the surface of the metal sheets becomes flat, thereby achieving the purpose of leveling the metal sheets. In actual operation, the spacing between the hot and cold rollers at fixed positions is fixed. When the metal sheet is bent, its shape is irregular and it is difficult to smoothly insert it into the fixed spacing between the hot and cold rollers. Secondly, during the leveling process, if the metal sheet is tilted, the pressure and leveling force at different positions of the tilted metal sheet are uneven when passing through the hot and cold rollers, which will greatly reduce the leveling effect. There may still be local bends or the flatness does not meet the standards, which seriously affects the quality of subsequent glue iron and LCD backlight source. Summary of the invention

[0005] Based on this, it is necessary to provide a glue iron material leveling device in a liquid crystal display backlight source to address the problems that the current leveling device is inconvenient to use and has a poor leveling effect.

[0006] The above purpose is achieved through the following technical solutions:

[0007] A device for leveling glue and iron materials in a liquid crystal display backlight source comprises a machine body, an upper guide roller, a lower guide roller, a power mechanism and an adjustment mechanism, the machine body is fixedly arranged, a plurality of upper guide rollers and a plurality of lower guide rollers are provided, the plurality of upper guide rollers and the plurality of lower guide rollers are respectively and evenly arranged on the machine body along a first direction, the first direction is a horizontal direction, and a spacing is provided between the upper guide rollers and the lower guide rollers, the axis of each upper guide roller and each lower guide roller extends along a second direction, the second direction is in the same horizontal plane as the first direction, and the second direction is perpendicular to the first direction; the sheet material is arranged between the upper guide roller and the lower guide roller, the power mechanism is used to drive the upper guide roller and the lower guide roller to transport the sheet material along the first direction, the adjustment mechanism comprises a pressing roller, an adjustment component and a driving component, two pressing rollers are provided, the axis of the two pressing rollers extends in the horizontal direction The two pressure rollers extend and have an angle with the first direction and the second direction, the two pressure rollers are located above the lower guide roller, one end of the two pressure rollers are close to each other, and the other ends of the two pressure rollers are away from each other, in the direction of sheet material moving forward, the ends of the two pressure rollers close to each other are located in front of the ends away from each other, and the two pressure rollers are located on the rear side of the upper guide roller, and both pressure rollers can abut against the sheet material; in the initial state, the two pressure rollers are symmetrically arranged with respect to the vertical plane where the mid-perpendicular lines of the axes of the multiple lower guide rollers are located, and the adjustment component is used to control the distance between the pressure roller and the lower guide roller and to adjust the angle between the extension direction of the axes of the two pressure rollers and the first direction; two driving components are provided, each driving component is used to drive one of the pressure rollers to rotate and drive the sheet material to approach the upper guide roller along the first direction.

[0008] Preferably, two adjusting assemblies are provided, each adjusting assembly includes a support plate, a mounting frame, a deflection unit, a first guide wheel and a telescopic rod, the support plate is fixedly mounted on the machine body, one end of the mounting frame is rotatably arranged on the support plate, the rotation axis of the mounting frame extends in the vertical direction, both ends of the pressure roller are rotatably arranged on the mounting frame, the deflection unit is arranged on the mounting frame and one of the pressure rollers, and is used to rotate the pressure roller around a preset axis, the extension direction of the preset axis is consistent with the extension direction of the axis of the pressure roller and the preset axis does not coincide with the axis of the pressure roller, the first guide wheel is rotatably arranged on the mounting frame, the rotation axis of the first guide wheel coincides with the preset axis, and is used to drive the pressure roller to rotate through the driving unit, one end of the telescopic rod is hinged on the machine body, and the rotation axis of the telescopic rod extends in the vertical direction, the other end of the telescopic rod is connected to the mounting frame, and the telescopic rod is telescoped in the horizontal direction.

[0009] Preferably, a torsion spring is provided between the mounting frame and the support plate to provide power for resetting the mounting frame.

[0010] Preferably, friction is provided between the mounting frame and the support plate.

[0011] Preferably, a distance is provided between the axis of the pressing roller and the preset axis.

[0012] Preferably, each driving assembly includes a first motor, a belt and a tensioning part. The first motor is fixedly mounted on the machine body. A second guide wheel is provided on the output shaft of the first motor. The belt is wound around the second guide wheel and one of the first guide wheels. The tensioning part is arranged on the machine body to keep the belt in a taut state at all times.

[0013] Preferably, the tensioning part includes a slide plate, a tensioning wheel and a spring. The slide plate penetrates the body in the vertical direction and is slidably connected to the body. The tensioning wheel is rotatably arranged on the slide plate. The tensioning wheel is located between the belts on both sides of the axis of the second guide wheel, and the tensioning wheel is rotatably connected to the belt. The spring is arranged on the slide plate, and both ends of the spring are respectively connected to the slide plate and the body.

[0014] Preferably, grooves are provided on the circumferential surfaces of the first guide wheel and the second guide wheel, and the cross-section of the grooves is arc-shaped.

[0015] Preferably, the distance between the upper guide roller and the pressure roller in the first direction is smaller than the distance from the edge of the sheet to its center of gravity in the first direction.

[0016] Preferably, the power mechanism includes a second motor, a third motor and a transmission belt. The second motor and the third motor are fixedly mounted on the machine body. A chain is wound around the output shaft of the second motor and the upper guide roller. The transmission belt is arranged below the lower guide roller, and the transmission belt is in contact with the lower guide roller. The transmission belt in contact with the lower guide roller moves along the first direction, and the third motor is used to drive the transmission belt to rotate.

[0017] The beneficial effects of the present invention are as follows: through the position coordination of the pressure roller and the upper guide roller, the sheet material first passes between the pressure roller and the lower guide roller before entering between the upper guide roller and the lower guide roller, and the pressure roller and the lower guide roller first perform correction processing on the sheet material, so that the sheet material is in a straightened state as much as possible when leveled, thereby improving the leveling effect; the axis extension direction of the two pressure rollers is inclined between the forward direction of the sheet material, and when the pressure roller rotates to drive the sheet material to advance on the lower guide roller, the two pressure rollers will respectively apply two forces that are opposite and pull the sheet material outward, so that the inclined or non-centered sheet material is centered on the lower guide roller, and the angle of the sheet material entering between the upper guide roller and the lower guide roller is corrected, thereby improving the leveling effect of the sheet material; an adjustment component is provided, and the spacing between the pressure roller and the lower guide roller is variable, thereby facilitating the placement of the sheet material. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the structure of a glue-iron material leveling device in a liquid crystal display backlight source provided by an embodiment of the present invention;

[0019] Figure 2 A rear view of a glue-iron material taking and leveling device in a liquid crystal display backlight source provided by an embodiment of the present invention;

[0020] Figure 3A schematic diagram of the structure of an adjustment mechanism of a glue-iron material taking and leveling device in a liquid crystal display backlight source provided by an embodiment of the present invention;

[0021] Figure 4 A schematic diagram of the structure of an adjustment component of a glue-iron material taking and leveling device in a liquid crystal display backlight source provided by an embodiment of the present invention;

[0022] Figure 5 A schematic structural diagram of a pressing roller of a glue-iron material taking and leveling device in a liquid crystal display backlight source provided by an embodiment of the present invention;

[0023] Figure 6 A schematic diagram of the structure of a mounting frame for a glue-iron material taking and leveling device in a liquid crystal display backlight source provided by an embodiment of the present invention;

[0024] Figure 7 for Figure 6 Enlarged view of point A in the middle.

[0025] Wherein: 100, machine body; 101, upper guide roller; 102, lower guide roller; 103, pressure roller; 104, support plate; 105, mounting frame; 106, first guide wheel; 107, telescopic rod; 108, concentric plate; 109, positioning rod; 110, positioning hole; 111, first motor; 112, belt; 113, second guide wheel; 114, slide plate; 115, tensioning wheel; 116, spring; 117, second motor; 118, third motor; 119, transmission belt. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0027] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in the present invention, unless otherwise specified, include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention 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 cannot be understood as a limitation to the present invention.

[0028] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0029] like Figures 1 to 7 As shown, an embodiment of the present invention provides a liquid crystal display backlight source glue iron material leveling device, including a body 100, an upper guide roller 101, a lower guide roller 102, a power mechanism and an adjustment mechanism, the body 100 is fixedly arranged, and a plurality of upper guide rollers 101 and lower guide rollers 102 are provided, and the plurality of upper guide rollers 101 and the plurality of lower guide rollers 102 are respectively and evenly arranged on the body 100 along a first direction, the first direction is a horizontal direction, and a spacing is provided between the upper guide rollers 101 and the lower guide rollers 102, and the axis of each upper guide roller 101 and each lower guide roller 102 extends along a second direction, the second direction is in the same horizontal plane as the first direction, and the second direction is perpendicular to the first direction; the sheet material is arranged between the upper guide roller 101 and the lower guide roller 102, the power mechanism is used to drive the upper guide roller 101 and the lower guide roller 102 to transport the sheet material along the first direction, the adjustment mechanism includes a pressing roller 103, an adjustment component and a driving component, and two pressing rollers 103 are provided, and the two pressing rollers 10 3 extends in the horizontal direction and has an included angle with the first direction and the second direction, the two pressing rollers 103 are located above the lower guide roller 102, in the direction of the sheet material moving forward, the ends of the two pressing rollers 103 that are close to each other are located in front of the ends that are away from each other, and the two pressing rollers 103 are located on the rear side of the upper guide roller 101, and the two pressing rollers 103 can both abut against the sheet material; in the initial state, the two pressing rollers 103 are symmetrically arranged about the vertical plane where the mid-perpendicular lines of the axes of the plurality of lower guide rollers 102 are located, and the adjustment component is used to control the distance between the pressing roller 103 and the lower guide roller 102 and to adjust the included angle between the axis extension direction of the two pressing rollers 103 and the first direction; the spacing between the ends of the two pressing rollers 103 that are away from each other in the second direction is greater than the length of the sheet material in the second direction; there are two driving components, each of which is used to drive one of the corresponding pressing rollers 103 to rotate and drive the sheet material to approach the upper guide roller 101 along the first direction.

[0030] By coordinating the positions of the pressure roller 103 and the upper guide roller 101, the sheet material passes between the pressure roller 103 and the lower guide roller 102 before entering between the upper guide roller 101 and the lower guide roller 102. The pressure roller 103 and the lower guide roller 102 first correct the sheet material so that the sheet material is in a straightened state as much as possible during leveling, thereby improving the leveling effect. The two pressure rollers 103 are arranged obliquely between the axis extension direction and the forward direction of the sheet material. When the pressure roller 103 rotates to drive the sheet material to advance on the lower guide roller 102, the two pressure rollers 103 will respectively apply two forces that are opposite and pull the sheet material outward, thereby making the inclined or non-centered sheet material centered on the lower guide roller 102, correcting the angle of the sheet material entering between the upper guide roller 101 and the lower guide roller 102, thereby improving the leveling effect of the sheet material. An adjustment component is provided, and the spacing between the pressure roller 103 and the lower guide roller 102 is variable, thereby facilitating the placement of the sheet material.

[0031] In this embodiment, two adjustment components are provided, each adjustment component includes a support plate 104, a mounting frame 105, a deflection unit, a first guide wheel 106 and a telescopic rod 107. The support plate 104 is fixedly mounted on the machine body 100, one end of the mounting frame 105 is rotatably arranged on the support plate 104, and the rotation axis of the mounting frame 105 extends in the vertical direction. Both ends of the pressure roller 103 are rotatably arranged on the mounting frame 105. The deflection unit is arranged on the mounting frame 105 and one of the pressure rollers 103, and is used to rotate the pressure roller 103 around a preset axis. The extension direction of the preset axis is consistent with the extension direction of the axis of the pressure roller 103 and the preset axis does not coincide with the axis of the pressure roller 103. The deflection unit includes a concentric plate 108 and multiple positioning rods 109, a concentric hole is opened on the end face of the pressure roller 103, the concentric hole is coaxial with the pressure roller 103, the concentric plate 108 is rotatably set in the concentric hole, and the rotation axis of the concentric plate 108 is coaxial with the axis of the pressure roller 103, and the end face of the pressure roller 103 is opened with multiple positioning holes 110 vertically adapted to the positioning rod 109, and are evenly distributed around the concentric plate 108, and the multiple positioning rods 109 are fixedly installed on the mounting frame 105, and each positioning rod 109 is correspondingly rotatably set in a positioning, and the diameter of the positioning rod 109 is smaller than the diameter of the positioning hole 110; there are two deflection parts, and the two deflection parts are correspondingly set to the two end faces of the corresponding pressure roller 103.

[0032] The first guide wheel 106 is rotatably arranged on the mounting frame 105, and the rotation axis of the first guide wheel 106 coincides with the preset axis, and is used to drive the pressure roller 103 to rotate through the driving part. The first guide wheel 106 is fixedly connected to one of the concentric plates 108, and the extension direction of the rotation axis of the first guide wheel 106 is consistent with the extension direction of the rotation axis of the concentric plate 108 and does not coincide with the rotation axis of the concentric plate 108. The rotation of the first guide wheel 106 drives the concentric plate 108 to rotate, and the rotation of the concentric plate 108 drives the pressure roller 103 to rotate. Under the action of the positioning rod 109 and the corresponding positioning hole 110, the positioning rod 109 does not rotate. The pressing roller 103 rotates along its own axis and around the rotation axis of the first guide wheel 106, so that the pressing roller 103 can intermittently contact the sheet material below it; one end of the telescopic rod 107 is hinged on the machine body 100, and the rotation axis of the telescopic rod 107 extends in the vertical direction, and the other end of the telescopic rod 107 is connected to the mounting frame 105. The telescopic rod 107 is telescopically extended and retracted in the horizontal direction. When the pressing roller 103 contacts the sheet material and the sheet material moves along the first direction, the sheet material can drive the mounting frame 105 to rotate around its rotation axis on the support plate 104 through the pressing roller 103, and the telescopic rod 107 adaptively retracts and retracts according to the rotation of the mounting frame 105.

[0033] In this embodiment, a torsion spring is provided between the mounting frame 105 and the support plate 104 to provide power for the resetting of the mounting frame 105. When the mounting frame 105 rotates relative to the support plate 104 under the action of the sheet material, the torsion spring will accumulate force to drive the mounting frame 105 to reset when the pressure roller 103 is separated from the sheet material.

[0034] In this embodiment, friction is provided between the mounting frame 105 and the support plate 104. Under the action of the friction, the time for the mounting frame 105 to be reset driven by the torsion spring is increased. When the two pressure rollers 103 contact the unaligned sheet material, the two pressure rollers 103 exert different forces on the sheet material, so that the sheet material is gradually aligned. During the alignment process, the sheet material will drive the mounting frame 105 to rotate through the corresponding pressure rollers 103. After rotation, the angle between the axis extension direction of the pressure roller 103 and the first direction becomes larger, thereby increasing the torque driving the sheet material to rotate. The sheet material can rotate in the opposite direction, avoiding over-correction caused by excessive unidirectional rotation of the sheet material. Since the pressure roller 103 and the sheet material are in gap contact, increasing the friction between the mounting frame 105 and the support plate 104 can extend the holding time of the angle between the axis extension direction of the pressure roller 103 and the first direction, thereby reducing the probability of over-correction of the sheet material.

[0035] In this embodiment, a distance is provided between the axis of the pressing roller 103 and the preset axis. When the first guide wheel 106 rotates, it can drive the pressing roller 103 to rotate around the axis of the first guide wheel 106. The distance between the pressing roller 103 and the lower guide roller 102 is variable, which facilitates the placement of the sheet material between the pressing roller 103 and the lower guide roller 102.

[0036] In this embodiment, each driving component corresponds to a pressure roller 103, and each driving component includes a first motor 111, a belt 112 and a tensioning part. The first motor 111 is fixedly mounted on the machine body 100, and a second guide wheel 113 is provided on the output shaft of the first motor 111. The belt 112 is wound around the second guide wheel 113 and one of the first guide wheels 106. The tensioning part is arranged on the machine body 100, and is used to keep the belt 112 in a taut state at all times. The first motor 111 drives the first guide wheel 106 to rotate through the belt 112, and the first guide wheel 106 drives the corresponding pressure roller 103 to rotate. Since the pressure roller 103 and the first guide wheel 106 are not coaxial, the pressure roller 103 rotates around the axis of the first guide wheel 106, and the pressure roller 103 is in a jumping state relative to the sheet material.

[0037] In this embodiment, the tensioning part includes a slide plate 114, a tensioning wheel 115 and a spring 116. The slide plate 114 penetrates the body 100 in the vertical direction and is slidably connected to the body 100. The tensioning wheel 115 is rotatably arranged on the slide plate 114. The tensioning wheel 115 is located between the belts 112 on both sides of the axis of the second guide wheel 113, and the tensioning wheel 115 is rotatably connected to the belt 112. The spring 116 is arranged on the slide plate 114, and the two ends of the spring 116 are respectively connected to the slide plate 114 and the body 100. The slide plate 114 is U-shaped and has an opening, and the opening of the slide plate 114 faces upward. The tensioning wheel 115 is arranged at the opening position of the slide plate 114. The spring 116 is retracted and retracted in the vertical direction. One end of the spring 116 is connected to the bottom of the opening of the slide plate 114, and the other end of the spring 116 is connected to the body 100. Under normal conditions, the spring 116 is in a semi-compressed state, and the belt 112 is in a taut state under the action of the spring 116.

[0038] In this embodiment, grooves are provided on the circumferential surfaces of the first guide wheel 106 and the second guide wheel 113, and the cross-section of the grooves is arc-shaped. When the pressure roller 103 rotates around the adjustment component, the belt 112 is not easy to slip on the first guide wheel 106 and the second guide wheel 113, thereby improving the stability of the belt 112.

[0039] In this embodiment, the distance between the upper guide roller 101 and the pressure roller 103 in the first direction is smaller than the distance between the edge of the sheet and its center of gravity in the first direction. After the sheet contacts the pressure roller 103, the pressure roller 103 adjusts the sheet by the position of the center of gravity of the sheet on the lower guide roller 102. In the direction of the sheet's advance, when the center of gravity of the sheet is located behind the pressure roller 103 and the sheet is deflected on the pressure roller 103, the contact areas between the two pressure rollers 103 and the sheet are different, and the forces acting on the sheet by the two pressure rollers 103 are The length of the force arm between the position of the action point and the center of gravity of the sheet is different. Under the action of the two pressure rollers 103, the sheet rotates until the sheet is straightened on the lower guide roller 102 and the forces exerted on the sheet by the two pressure rollers 103 are consistent; when the center of gravity of the sheet is located in front of the pressure roller 103, the sheet has contacted with the upper guide roller 101 and the sheet is in a state close to being straightened. The upper guide roller 101 and the lower guide roller 102 squeeze the sheet and transport it forward, and the pressure roller 103 no longer affects the sheet.

[0040] In this embodiment, the power mechanism includes a second motor 117, a third motor 118 and a transmission belt 119. The second motor 117 and the third motor 118 are fixedly mounted on the machine body 100. A chain is wound around the output shaft of the second motor 117 and the upper guide roller 101. When the second motor 117 rotates, the upper guide roller 101 can be driven to rotate through the chain. The transmission belt 119 is arranged below the lower guide roller 102, and the transmission belt 119 contacts the lower guide roller 102. The transmission belt 119 in contact with the lower guide roller 102 moves along the first direction. The third motor 118 It is used to drive the transmission belt 119 to rotate. Two transmission rollers are rotatably arranged on the machine body 100. The extension direction of the rotation axis of the two transmission rollers is consistent with the extension direction of the rotation axis of the lower guide roller 102. The transmission belt 119 is wound around the two transmission rollers. The output shaft of the third motor 118 is connected to one of the transmission rollers. The rotation of the third motor 118 drives the transmission belt 119 to rotate through the transmission roller. The rotation of the transmission belt 119 can drive the lower guide roller 102 to rotate. The rotation of the upper guide roller 101 and the lower guide roller 102 can drive the sheet material therebetween to move and flatten the sheet material.

[0041] The working principle of the glue iron material leveling device in the liquid crystal display backlight source provided in the above embodiment is:

[0042] First, start the first motor 111, the second motor 117 and the third motor 118. The first motor 111 drives the second guide wheel 113 to rotate. The second guide wheel 113 drives the first guide wheel 106 to rotate through the belt 112. The rotation of the first guide wheel 106 drives the concentric plate 108 to rotate. The concentric plate 108 drives the pressure roller 103 to rotate around the rotation axis of the first guide wheel 106 to make periodic changes. The rotation speed of the two pressure rollers 103 and the distance between them and the lower guide roller 102 are consistent; the second motor 117 drives the chain to rotate, and the chain rotation drives the upper guide roller 101 to rotate. The third motor 118 drives the transmission roller to rotate, and the transmission roller drives the transmission belt 119 to rotate. The transmission belt 119 drives the lower guide roller 102 to rotate by cooperating with the lower guide roller 102. The rotation of the lower guide roller 102, the upper guide roller 101 and the pressure roller 103 can drive the sheet to move in the first direction.

[0043] Then the operator places the sheet material on the lower guide roller 102, and places the sheet material under the pressing roller 103 when the pressing roller 103 is farthest from the lower guide roller 102. At this time, the pressing roller 103 does not contact the sheet material, and the pressing roller 103 rotates around the rotation axis of the first guide wheel 106. The pressing roller 103 changes from the highest point to the lowest point and gradually contacts the sheet material. After the two pressing rollers 103 contact the sheet material, they work together with the lower guide roller 102 to drive the sheet material along the first direction to approach the upper guide roller 101.

[0044] When the two pressure rollers 103 are in contact with the sheet material, if the force arms of the points of application of the two pressure rollers 103 on the sheet material are of the same length and the angles between the axis extension directions of the two pressure rollers 103 and the first direction are of the same size, it means that the sheet material is placed relatively centered, otherwise the sheet material is not aligned; when the sheet material is not aligned, the two corners on the end of the sheet material that contacts the two pressure rollers 103 are one in front and one behind in the direction of the sheet material's advance, assuming that the angle at the front is the first angle and the angle at the back is the second angle, the torque generated by the pressure roller 103 corresponding to the first angle on the sheet material away from the pressure roller 103 corresponding to the second angle is larger, which can drive the sheet material to deflect. , the first angle of the sheet rotates around the second angle, and correspondingly, the second angle rotates around the first angle, and the distance between the second angle and the first angle in the first direction is shortened. At the same time, the pressure roller 103 corresponding to the second angle is pushed by the sheet, and the angle between the extension direction of the rotation axis and the first direction increases, and the component force of the pressure roller 103 corresponding to the second angle on the sheet in one direction increases. As the pressure roller 103 rotates, the distance between the second angle and the first angle in the first direction is further shortened, and each time the pressure roller 103 separates from the sheet, the pressure roller 103 will be partially reset under the action of the torsion spring, and the torque of the two pressure rollers 103 on the sheet gradually becomes consistent.

[0045] When the difference in torque between the two pressure rollers 103 on the sheet material gradually decreases and the force components along the second direction applied by the two pressure rollers 103 to the sheet material are consistent, the sheet material is in an aligned state and the two pressure rollers 103 will not cause the sheet material to deflect; conversely, when the difference in torque between the two pressure rollers 103 on the sheet material gradually decreases and the force components along the second direction applied by the two pressure rollers 103 to the sheet material are inconsistent, the sheet material moves in the second direction, and the difference in torque between the two pressure rollers 103 on the sheet material gradually increases, and the two pressure rollers 103 enter the adjustment stage of the sheet material again until the sheet material is aligned.

[0046] The straightened sheet material is pushed by the lower guide roller 102 and the pressure roller 103 into between the upper guide roller 101 and the lower guide roller 102 for further leveling.

[0047] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, 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, they should be considered to be within the scope of this specification.

[0048] The above-described embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A device for leveling the glue iron in the backlight source of a liquid crystal display, characterized in that: include: A machine body, an upper guide roller, a lower guide roller, a power mechanism and an adjustment mechanism. The machine body is fixedly arranged. A plurality of upper guide rollers and a plurality of lower guide rollers are provided. The plurality of upper guide rollers and the plurality of lower guide rollers are respectively and evenly arranged on the machine body along a first direction. The first direction is a horizontal direction. A spacing is provided between the upper guide rollers and the lower guide rollers. The axis of each upper guide roller and each lower guide roller extends along a second direction. The second direction is in the same horizontal plane as the first direction, and the second direction is perpendicular to the first direction. The sheet material is arranged between the upper guide roller and the lower guide roller. The power mechanism is used to drive the upper guide roller and the lower guide roller to transport the sheet material along the first direction. The adjustment mechanism includes a pressing roller, an adjustment assembly and a driving assembly. Two pressing rollers are provided. The axis of the two pressing rollers extends in a horizontal direction and a spacing is provided between the first direction and the second direction. Angle, the two pressure rollers are located above the lower guide roller, one end of the two pressure rollers is close to each other, and the other ends of the two pressure rollers are away from each other. In the direction of the sheet material moving forward, the ends of the two pressure rollers close to each other are located in front of the ends away from each other, and the two pressure rollers are located on the rear side of the upper guide roller. Both pressure rollers can abut against the sheet material, and the distance between the upper guide roller and the pressure roller in the first direction is smaller than the distance from the edge of the sheet material to its center of gravity in the first direction; in the initial state, the two pressure rollers are symmetrically arranged about the vertical plane where the midpoint of the axis of the plurality of lower guide rollers is located, and the adjustment component is used to control the distance between the pressure roller and the lower guide roller and to adjust the angle between the extension direction of the axis of the two pressure rollers and the first direction; there are two drive components, each of which is used to drive one of them A pressure roller rotates and drives the sheet material to approach the upward guide roller in a first direction. Two adjustment components are provided, each of which includes a support plate, a mounting frame, a deflection unit, a first guide wheel and a telescopic rod. The support plate is fixedly mounted on the machine body, one end of the mounting frame is rotatably arranged on the support plate, and the rotation axis of the mounting frame extends in the vertical direction. Both ends of the pressure roller are rotatably arranged on the mounting frame. The deflection unit is arranged on the mounting frame and one of the pressure rollers, and is used to rotate the pressure roller around a preset axis. The extension direction of the preset axis is consistent with the extension direction of the axis of the pressure roller and the preset axis does not coincide with the axis of the pressure roller. The first guide wheel is rotatably arranged on the mounting frame, and the rotation axis of the first guide wheel coincides with the preset axis, and is used to drive the pressure roller to rotate through the driving unit. One end of the telescopic rod is hinged to the machine body. The cam is connected to the support plate to retract the support plate, and the cam is used to retract the support plate so that the cam can be retracted and retracted in the horizontal direction. A torsion spring is provided between the support plate and the support plate to provide power for resetting the support plate. A friction force is provided between the support plate and the support plate. Under the action of the friction force, the time for the torsion spring to drive the support plate to reset increases. When the two pressure rollers contact the unaligned sheet material, the two pressure rollers exert different forces on the sheet material, so that the sheet material is gradually aligned. During the alignment process, the sheet material drives the mounting frame to rotate through the corresponding pressure rollers. The angle between the axis extension direction of the pressure roller after rotation and the first direction becomes larger, thereby increasing the torque for driving the sheet material to rotate. The sheet material can rotate in the opposite direction, thereby avoiding overcorrection caused by excessive unidirectional rotation of the sheet material.Each driving assembly includes a first motor, a belt and a tensioning part. The first motor is fixedly mounted on the machine body. A second guide wheel is provided on the output shaft of the first motor. The belt is wound around the second guide wheel and one of the first guide wheels. The tensioning part is provided on the machine body to keep the belt in a taut state. The tensioning part includes a slide plate, a tensioning wheel and a spring. The slide plate passes through the machine body in a vertical direction and is slidably connected to the machine body. The tensioning wheel is rotatably provided on the slide plate. The tensioning wheel is located between the belts on both sides of the axis of the second guide wheel, and the tensioning wheel is rotatably connected to the belt. The spring is provided on the slide plate, and the two ends of the spring are respectively connected to the slide plate and the machine body. ; 2. The device for leveling the glue and iron in the liquid crystal display backlight source according to claim 1, characterized in that: A distance is arranged between the axis of the pressing roller and the preset axis.

3. The device for leveling the glue and iron in the liquid crystal display backlight source according to claim 1, characterized in that: The circumferences of the first guide wheel and the second guide wheel are both provided with grooves, and the cross-section of the grooves is arc-shaped.

4. The device for leveling the glue and iron in the liquid crystal display backlight source according to claim 1, characterized in that: The power mechanism includes a second motor, a third motor and a transmission belt. The second motor and the third motor are fixedly mounted on the machine body. A chain is wound around the output shaft of the second motor and the upper guide roller. The transmission belt is arranged below the lower guide roller, and the transmission belt contacts the lower guide roller. The transmission belt in contact with the lower guide roller moves along the first direction, and the third motor is used to drive the transmission belt to rotate.

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