Rolling test device for flexible material

Abstract

To provide a rolling test device for a flexible material.SOLUTION: The flexible material rolling test apparatus includes a rolling unit including a winding roller configured to grip one side of the flexible material and a winding driving unit configured to rotate the winding roller in forward and reverse directions such that the flexible material is wound around the winding roller or unwound from the winding roller, a sliding unit configured to grip the other side of the flexible material, spaced apart from the winding roller, and configured to slide the flexible material according to rotation of the winding roller, an elevating unit configured to elevate the rolling unit, and a control unit configured to control operations of the rolling unit, the sliding unit, and the elevating unit according to rotation of the winding roller such that a slope of the flexible material is adjusted between the rolling unit and the sliding unit.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a rolling test device for flexible materials that prevents the flexible material from tilting between a sliding unit and a rolling unit when performing a rolling test on the flexible material, and maintains a constant tensile force applied to the flexible material. [Background technology]

[0002] Generally, LCDs (Liquid Crystal Displays), Organic Light Emitting Diodes (OLEDs), and ELs (Electroluminescence) are types of FPDs (Flat Panel Displays) that have low power consumption, light weight, and flatness characteristics, and are therefore used in a variety of applications, including monitors for televisions, computers, and mobile phones, as well as automobiles and aircraft.

[0003] In recent years, the industry has been actively developing flexible displays. As the performance and quality of such flexible displays improve, they must not only bend but also have durability and driving stability that can withstand bending to a certain extent. More precisely, flexible displays must be able to display normal images even when bent or rolled and then unrolled again. Thus, flexibility, the degree to which a flexible display can bend within a range that allows normal image display, is one of the important performance characteristics of flexible displays.

[0004] In recent years, as the performance and quality of flexible displays have improved, research and development into displays such as foldable display technology, which allows displays to be completely folded or unfolded for use, slidable display technology, which allows displays to be slid for use, and rollable display technology, which allows displays to be rolled up like paper for use, has been actively conducted, and commercialization based on the results of this research and development has also been actively conducted.

[0005] In particular, when conducting durability tests on rollable displays during the development process of rollable display technology, the tensile force applied to the rollable display is one of the factors that has the greatest impact on the test. To obtain fair and consistent test results, the tensile force applied to the flexible material must be set to maintain a constant value.

[0006] However, when a rolling test of a flexible material is carried out, as the flexible material is wound around the rolling unit, the diameter of the rolling unit increases, causing the flexible material to tilt, which causes a problem in that the durability evaluation of the flexible material varies considerably depending on the tilt of the flexible material. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Korean Patent No. 10-2348742 (Announced on January 7, 2022, Title of invention: Rolling device and evaluation system for evaluating the durability of flexible materials) Summary of the Invention [Problem to be solved by the invention]

[0008] The present invention has been made to solve such problems, and its object is to provide a rolling test device for flexible materials that prevents the flexible material from tilting between the sliding unit and the rolling unit when rolling testing the flexible material, and maintains a constant tensile force applied to the flexible material. [Means for solving the problem]

[0009] A flexible material rolling test device according to a preferred embodiment of the disclosed invention includes a rolling unit including a winding roller that grips one side of the flexible material and a winding drive unit that rotates the winding roller forward and backward so that the flexible material is wound onto the winding roller or unwound from the winding roller; a sliding unit that grips the other side of the flexible material and is positioned spaced apart from the winding roller to slide the flexible material in accordance with the rotation of the winding roller; an elevating unit that moves the rolling unit up and down; and a control unit that controls the operations of the rolling unit, the sliding unit, and the elevating unit in accordance with the rotation of the winding roller so that the inclination of the flexible material between the rolling unit and the sliding unit is adjusted.

[0010] This clarifies the initial setting of the flexible material, clearly links the operations of the rolling unit, sliding unit, and lifting unit, and prevents wrinkles in the flexible material.

[0011] Here, the sliding unit includes a slide guide positioned at a distance from the winding roller, a gripping slider slidably connected to the slide guide, a detachable member provided on the gripping slider for gripping the other side of the flexible material, and a slide drive unit for sliding the gripping slide on the slide guide in response to the rotation of the winding roller.

[0012] This allows the flexible material to be kept in a taut state, and the rolling and unrolling operations of the flexible material can be stably achieved.

[0013] Here, the lifting unit includes a ball screw that is disposed apart from the rolling unit and extends in the direction of the lifting movement of the winding roller, a screw driving unit that rotates the ball screw forward and backward so that the winding roller moves up and down, a lifting member that is threaded onto the ball screw, and a lifting bracket that connects the rolling unit and the lifting member.

[0014] As a result, the winding roller moves up and down in conjunction with the operation of the rolling unit and the sliding unit, minimizing or preventing the flexible material from tilting between the rolling unit and the sliding unit, and the tension applied to the flexible material can be set to be maintained constant.

[0015] Here, the control unit includes a condition input unit into which the length of the flexible material, the thickness of the flexible material, and the diameter of the winding roller are input as condition information; a rotation number calculation unit that calculates the number of rotations of the winding roller using the condition information; a rolling distance calculation unit that calculates a rolling distance that the other side of the flexible material slides and moves by the sliding unit according to the number of rotations using the condition information and the number of rotations; a lifting distance calculation unit that calculates a lifting distance that the winding roller moves up and down according to the number of rotations using the condition information and the number of rotations; and a drive control unit that controls the operations of the rolling unit, the sliding unit, and the lifting unit using the number of rotations, the rolling distance, and the lifting distance so that the inclination of the flexible material is adjusted between the rolling unit and the sliding unit.

[0016] This allows the winding roller to be changed in various ways depending on the flexible material to be tested, and by interlocking the rolling unit, sliding unit, and lifting unit, the rotation of the winding roller, the lifting movement of the winding roller, and the sliding movement of the flexible material can be clarified, while improving the accuracy of the test results. [Effects of the Invention]

[0017] According to the present invention, it is possible to realize a rolling test device for flexible materials that prevents the flexible material from tilting between the sliding unit and the rolling unit when performing a rolling test on the flexible material, and maintains a constant tensile force applied to the flexible material.

[0018] Furthermore, the present invention allows the flexible material to maintain a flat state continuously, and allows the tension of the flexible material to be adjusted so that a uniform tension acts on the flexible material.

[0019] Furthermore, the present invention clarifies the initial setting of the flexible material, and clearly links the operations of the rolling unit, sliding unit, and lifting unit, thereby preventing wrinkles in the flexible material.

[0020] Furthermore, the present invention can maintain the flexible material in a taut state, and can stably realize the rolling operation of the flexible material and the unrolling operation of the flexible material.

[0021] In addition, in the present invention, the winding roller moves up and down in conjunction with the operation of the rolling unit and the sliding unit, which minimizes or prevents the flexible material from tilting between the rolling unit and the sliding unit, and allows the tension applied to the flexible material to be set to be constant.

[0022] In addition, the present invention allows for various changes to the winding roller depending on the flexible material to be tested, and by linking the rolling unit, sliding unit, and lifting unit, the rotation of the winding roller, the lifting movement of the winding roller, and the sliding movement of the flexible material can be clarified, while improving the accuracy of the test results.

[0023] In addition, the present invention realizes intermittent rotation of the winding roller according to the rotation speed of the winding roller, predicts changes in the inclination of the flexible material according to the thickness of the flexible material, and can easily correct test results due to the inclination of the flexible material.

[0024] In addition, the present invention realizes continuous rotation of the winding roller according to the rotation speed of the winding roller, and can stably maintain the initially set flatness of the flexible material, making it possible to easily correct test results due to the inclination of the flexible material. [Brief explanation of the drawings]

[0025] [Figure 1] FIG. 1 illustrates a flexible material rolling test device according to one embodiment of the present invention. [Figure 2] 10A and 10B are diagrams for explaining the operation of a control unit in the rolling test device for flexible materials according to one embodiment of the present invention. [Figure 3] 10A and 10B are diagrams illustrating the operation of the lifting unit when the winding roller rotates intermittently depending on the rotation speed in the flexible material rolling test device according to one embodiment of the present invention. [Figure 4] 10A and 10B are diagrams illustrating the operation of the lifting unit when the winding roller rotates continuously according to the rotation speed in the rolling test device for flexible materials according to one embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0026] The above-mentioned objects, other objects, features, and advantages of the present invention can be easily understood through the following preferred embodiments in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments described herein and may be embodied in other forms. Rather, the embodiments introduced herein are provided so that the disclosed content will be thorough and complete, and so that the concept of the present invention will be fully conveyed to those skilled in the art.

[0027] In this specification, when a component is referred to as being on another component, it means that the component may be formed directly on the other component, or a third component may be interposed between them. Furthermore, in the drawings, the thickness of the components may be exaggerated for the purpose of effectively explaining the technical content.

[0028] In this specification, when terms such as "first" and "second" are used to describe components, these components should not be limited by these terms. These terms are merely used to distinguish one component from another. The embodiments described and illustrated herein also include their complementary embodiments.

[0029] Additionally, when a first element (or component) is referred to as operating or executing on a second element (or component), it should be understood that the first element (or component) operates or executes in the environment in which the second element (or component) operates or executes, or operates or executes through direct or indirect interaction with the second element (or component).

[0030] When an element, component, device, or system is said to include a component consisting of a program or software, it should be understood that the element, component, device, or system also includes hardware (e.g., memory, CPU, etc.) or other programs or software (e.g., an operating system or drivers necessary to operate the hardware) necessary for the program or software to execute or operate, even if not explicitly stated.

[0031] Furthermore, unless a specific reference is made to the implementation of a certain element (or component), it should be understood that the element (or component) can be implemented in the form of software, hardware, or both software and hardware.

[0032] Furthermore, the terms used in this specification are for the purpose of describing the embodiments and do not limit the present invention. In this specification, the singular form includes the plural form unless otherwise specified in the context. As used in this specification, "comprises" and / or "comprising" do not exclude the presence or addition of one or more other components in addition to the components mentioned.

[0033] 1 to 4, a rolling test device for a flexible material according to an embodiment of the present invention may include a rolling unit 20, a sliding unit 10, a lifting unit 30, and a control unit 40.

[0034] The rolling unit 20 grips one side of the flexible material so that the flexible material is wound up or unwound.

[0035] The rolling unit 20 may include a winding roller 21 that grips one side of the flexible material, and a winding driver 22 that rotates the winding roller 21 forward and backward so that the flexible material is wound onto or unwound from the winding roller 21. The diameter of the winding roller 21 can be changed in various ways depending on the length and thickness of the flexible material to be tested, and the like, and the winding roller 21 can be detachably connected to the winding driver 22.

[0036] The sliding unit 10 grips the other side of the flexible material, is disposed apart from the winding roller 21, and slides the flexible material in response to the rotation of the winding roller 21.

[0037] The sliding unit 10 can include a slide guide 11 arranged at a distance from the winding roller 21 of the rolling unit 20, a gripping slider 12 slidably connected to the slide guide 11, a detachable member 121 provided on the gripping slider 12 for gripping the other side of the flexible material, and a slide drive unit 13 for sliding the gripping slider 12 on the slide guide 11 in accordance with the rotation of the winding roller 21 of the rolling unit 20.

[0038] According to the operation of the rolling unit 20, the sliding unit 10 adjusts the sliding speed of the flexible material, so that the flexible material can be stably maintained in a flat state.

[0039] Although not shown, the sliding unit 10 can slide the gripping slider 12 using a ball screw system. The sliding unit 10 can further include a screw member that is rotated forward and backward by the slide drive unit 13 and is screwed into the gripping slider 12. In this case, the rotational movement of the screw member is converted into the linear movement of the gripping slider 12, allowing the gripping slider 12 to slide stably on the slide guide 11. The screw member operates together with a ball screw 31, which will be described later, and the gripping slider 12 operates together with a lifting member 33, which will be described later.

[0040] The lifting unit 30 moves the rolling unit 20 up and down.

[0041] The lifting unit 30 can include a ball screw 31 that is positioned at a distance from the rolling unit 20 and extends along the direction of lifting and lowering movement of the winding roller 21, a screw drive unit 32 that rotates the ball screw 31 forward and backward so that the winding roller 21 moves up and down, a lifting member 33 that is threaded onto the ball screw 31, and a lifting bracket 34 that connects the rolling unit 20 and the lifting member 33.

[0042] In this way, the rotational motion of the ball screw 31 is converted into the linear motion of the lifting member 33, so that the winding roller 21 can be moved up and down stably.

[0043] The control unit 40 controls the operations of the rolling unit 20, the sliding unit 10 and the lifting unit 30 in accordance with the rotation of the winding roller 21 so that the inclination of the flexible material is adjusted between the rolling unit 20 and the sliding unit 10.

[0044] The control unit 40 can include a condition input unit 41 in which the length of the flexible material, the thickness of the flexible material, and the diameter of the winding roller 21 are input as condition information; a rotation speed calculation unit 42 that calculates the number of rotations of the winding roller 21 using the condition information; a rolling distance calculation unit 43 that calculates the rolling distance that the other side of the flexible material slides over by the sliding unit 10 according to the number of rotations using the condition information and the number of rotations; a lifting distance calculation unit 44 that calculates the lifting distance that the winding roller 21 moves up and down according to the number of rotations using the condition information and the number of rotations; and a drive control unit 45 that controls the operation of the rolling unit 20, the sliding unit 10, and the lifting unit 30 using the number of rotations, the rolling distance, and the lifting distance so that the inclination of the flexible material is adjusted between the rolling unit 20 and the sliding unit 10.

[0045] Therefore, considering a method for controlling a flexible material rolling test device according to an embodiment of the present invention, as shown in Fig. 2, the control unit 40 can perform a condition input step (S1) by inputting the length of the flexible material, the thickness of the flexible material, and the diameter of the winding roller 21 according to the flexible material to be tested. Thus, in the condition input step (S1), condition information is input. The condition input step (S1) can be performed by the operation of the condition input unit 41. At this time, the condition information is the length of the flexible material, the thickness of the flexible material, and the diameter of the winding roller 21.

[0046] Prior to the condition input step (S1), the control unit 40 selects a flexible material to be tested and selects a winding roller 21 according to the selected flexible material, thereby enabling the sample selection step (S11) and the roller selection step (S12). Thus, the sample selection step (S11) selects a flexible material to be tested and extracts condition information from information on the selected flexible material. Furthermore, the roller selection step (S12) selects a winding roller 21 according to the selected flexible material and extracts condition information from information on the selected winding roller 21. The extracted condition information is then input to the condition input unit 41. The sample selection step (S11) and the roller selection step (S12) can be performed by the operation of the control unit 40.

[0047] Although not shown in the drawings, prior to the condition input step (S1), the control unit 40 couples the selected winding roller 21 to the winding driver 22, and operates the sliding unit 10 and the lifting unit 30 based on the condition information through the condition input step (S1), thereby performing the setting step. As a result, the setting step can set the rolling unit 20, the sliding unit 10, and the lifting unit 30 so that the flexible material is attached. The setting step can be performed by the operation of the control unit 40. More specifically, in response to the setting step, the control unit 40 operates the sliding unit 10 to separate the detachable member 121 from the winding roller 21 according to the length of the flexible material, and operates the lifting unit 30 to prevent an imaginary line connecting the other side of the flexible material coupled to the detachable member 121 and the portion of the flexible material in contact with the winding roller 21 from tilting.

[0048] The above-described setting steps can be performed manually by an operator.

[0049] After the condition input step (S1), the control unit 40 calculates the number of rotations of the winding roller 21 using the condition information, and thus the rotation number calculation step (S2) can be performed. As a result, the rotation number calculation step (S2) calculates the number of rotations of the winding roller 21 using the condition information. The rotation number calculation step (S2) can be performed by the operation of the rotation number calculation unit 42.

[0050] After the rotation speed calculation step (S2), the control unit 40 calculates the rolling distance according to the rotation speed using the condition information and the rotation speed, and calculates the lifting distance according to the rotation speed using the condition information and the rotation speed, so that the first distance calculation step (S3) and the second distance calculation step (S4) can be performed. The order of the first distance calculation step (S3) and the second distance calculation step (S4) is not limited, and the second distance calculation step (S4) may be performed after the first distance calculation step (S3), or the first distance calculation step (S3) may be performed after the second distance calculation step (S4), or the first distance calculation step (S3) and the second distance calculation step (S4) may be performed simultaneously. As a result, the first distance calculation step (S3) calculates the rolling distance according to the rotation speed, and the second distance calculation step (S4) calculates the lifting distance according to the rotation speed. The first distance calculation step (S3) can be performed by the operation of the rolling distance calculation unit 43, and the second distance calculation step (S4) can be performed by the operation of the lifting distance calculation unit 44. In this case, the rolling distance indicates the distance that the other side of the flexible material slides and moves by the sliding unit 10 according to the rotation speed, and the lifting distance indicates the distance that the winding roller 21 moves up and down according to the rotation speed.

[0051] After the first distance calculation step (S3) and the second distance calculation step (S4), the control unit 40 operates the rolling unit 20, the sliding unit 10, and the lifting unit 30 using the rotation speed, rolling distance, and lifting distance calculated so that the flexible material is wound onto the winding roller 21, thereby performing the first rolling control step (S51). Thus, the first rolling control step (S51) operates the rolling unit 20, the sliding unit 10, and the lifting unit 30 using the rotation speed, rolling distance, and lifting distance calculated so that the flexible material is wound onto the winding roller 21. The first rolling control step (S51) can be performed by the operation of the drive control unit 45.

[0052] Furthermore, after the first rolling control step (S51), the control unit 40 operates the rolling unit 20, the sliding unit 10, and the lifting unit 30 using the rotation speed, rolling distance, and lifting distance calculated so that the flexible material is unwound from the winding roller 21, thereby performing the second rolling control step (S52). Thus, the second rolling control step (S52) operates the rolling unit 20, the sliding unit 10, and the lifting unit 30 using the rotation speed, rolling distance, and lifting distance calculated so that the flexible material is unwound from the winding roller 21. The second rolling control step (S52) can be performed by the operation of the drive control unit 45.

[0053] As an example, assuming that the calculated number of rotations of the winding roller 21 is n, as shown in FIG. 3 , the first rolling control step (S51) intermittently rotates the winding roller 21 once in accordance with the rotation number, intermittently slides the other side of the flexible material in accordance with the intermittent rotations of the winding roller 21, and intermittently lowers the rolling unit 20 in accordance with the intermittent rotations of the winding roller 21. More specifically, in the first rolling control step (S51), the sliding unit 10 can intermittently slide the other side of the flexible material toward the winding roller 21 in accordance with the operation of the rolling unit 20. Also, in the first rolling control step (S51), the lifting unit 30 can intermittently lower the rolling unit in accordance with the thickness of the flexible material during a first inflection period when the rolling unit 20 stops and then rotates again, or during a second inflection period when the rolling unit 20 decelerates and then accelerates. When the winding roller 21 rotates n times according to the rotation speed, the first rolling control step (S51) can be completed.

[0054] In addition, the second rolling control step (S52) intermittently rotates the winding roller 21 in the reverse direction once in response to the rotation speed, intermittently slides the other side of the flexible material in response to the intermittent reverse rotation of the winding roller 21, and intermittently lifts the rolling unit in response to the intermittent reverse rotation of the winding roller 21. More specifically, in the second rolling control step (S52), the sliding unit 10 can intermittently slide the other side of the flexible material away from the winding roller 21 in response to the operation of the rolling unit 20. In addition, in the second rolling control step (S52), the lifting unit 30 can intermittently lift the rolling unit in response to the thickness of the flexible material during a first inflection period when the rolling unit 20 stops and then rotates again, or during a second inflection period when the rolling unit 20 decelerates and then accelerates. When the gripping slider 12 returns to its original position or the winding roller 21 rotates in the reverse direction n times according to the number of rotations, the second rolling control step (S52) can be completed.

[0055] As another example, if the calculated number of rotations of the winding roller 21 is n, as shown in FIG. 4, the first rolling control step (S51) continuously rotates the winding roller 21 according to the rotation number, continuously slides the other side of the flexible material according to the continuous rotation of the winding roller 21, and continuously lowers the rolling unit according to the continuous rotation of the winding roller 21. More specifically, in the first rolling control step (S51), the sliding unit 10 can continuously slide the other side of the flexible material toward the winding roller 21 according to the operation of the rolling unit 20. Also, in the first rolling control step (S51), the lifting unit 30 can continuously lower the rolling unit according to the operation of the rolling unit 20. When the winding roller 21 has rotated n times according to the rotation number, the first rolling control step (S51) can be completed.

[0056] In addition, the second rolling control step (S52) continuously rotates the winding roller 21 in the reverse direction once per rotation according to the rotation speed, continuously slides the other side of the flexible material in accordance with the continuous reverse rotation of the winding roller 21, and continuously lifts the rolling unit in accordance with the continuous reverse rotation of the winding roller 21. More specifically, in the second rolling control step (S52), the sliding unit 10 continuously slides the other side of the flexible material away from the winding roller 21 in accordance with the operation of the rolling unit 20. In addition, in the second rolling control step (S52), the lifting unit 30 continuously lifts the rolling unit in accordance with the operation of the rolling unit 20. The second rolling control step (S52) can be completed when the gripping slider 12 returns to its original position or the winding roller 21 has rotated in the reverse direction n times according to the rotation speed.

[0057] According to the above-described rolling test device for flexible materials, it is possible to realize a rolling test device for flexible materials that prevents the flexible material from tilting between the sliding unit 10 and the rolling unit 20 when rolling testing the flexible material, and maintains a constant tensile force applied to the flexible material.

[0058] In addition, the flexible material can be kept flat continuously, and the tension of the flexible material can be adjusted, so that a uniform tension acts on the flexible material.

[0059] Furthermore, the initial setting of the flexible material is made clear, and the operations of the rolling unit 20, sliding unit 10 and lifting unit 30 are clearly linked, thereby preventing wrinkles in the flexible material.

[0060] Furthermore, the flexible material can be maintained in a taut state, and the rolling operation of the flexible material and the unrolling operation of the flexible material can be stably achieved.

[0061] In addition, since the winding roller 21 moves up and down in conjunction with the operation of the rolling unit 20 and the sliding unit 10, tilting of the flexible material between the rolling unit 20 and the sliding unit 10 can be minimized or prevented, and the tensile force applied to the flexible material can be set to be maintained constant.

[0062] In addition, the winding roller 21 can be changed in various ways depending on the flexible material to be tested, and the rolling unit 20, sliding unit 10, and lifting unit 30 are linked together to clarify the rotation of the winding roller 21, the lifting movement of the winding roller 21, and the sliding movement of the flexible material, while improving the accuracy of the test results.

[0063] In addition, the intermittent rotation of the winding roller 21 is realized according to the rotation speed of the winding roller 21, and the change in the inclination of the flexible material is predicted according to the thickness of the flexible material, making it possible to easily correct the test results due to the inclination of the flexible material.

[0064] In addition, continuous rotation of the winding roller 21 is realized according to the rotation speed of the winding roller 21, and the initially set flatness of the flexible material can be stably maintained, making it possible to easily correct test results due to the inclination of the flexible material. [Explanation of symbols]

[0065] 10 Sliding Unit 11 Slide Guide 12 gripping slider 121 Detachable parts 13 Slide drive unit 20 Rolling Unit 21 Winding roller 22 Winding drive unit 30 Lifting unit 31 Ball screw 32 Screw drive unit 33 Lifting member 34 Lifting bracket 40 Control Unit 41 Condition input section 42 Rotational speed calculation section 43 Rolling distance calculation unit 44 Elevation distance calculation section 45 Drive control unit S11 Sample selection step S12 Roller selection step S1 Condition input step S2 Rotation speed calculation step S3 First distance calculation step S4 Second distance calculation step S51 First rolling control step S52 Second rolling control step

Claims

1. a rolling unit including a winding roller that grips one side of the flexible material, and a winding drive unit that rotates the winding roller forward and backward so that the flexible material is wound onto the winding roller or the flexible material is unwound from the winding roller; a sliding unit that grips the other side of the flexible material, is disposed apart from the winding roller, and slides the flexible material in response to rotation of the winding roller; an elevation unit that moves the rolling unit up and down; a control unit that controls the operations of the rolling unit, the sliding unit, and the lifting unit in accordance with the rotation of the winding roller so that the inclination of the flexible material is adjusted between the rolling unit and the sliding unit.

2. The sliding unit comprises: a slide guide disposed at a distance from the winding roller; a gripping slider slidably coupled to the slide guide; a detachable member provided on the gripping slider and configured to grip the other side of the flexible material; 2. The rolling test device for flexible materials according to claim 1, further comprising: a slide drive unit that slides the gripping slide on the slide guide in response to rotation of the winding roller.

3. The lifting unit is a ball screw disposed apart from the rolling unit and extending along the vertical movement direction of the winding roller; a screw driving unit that rotates the ball screw forward and backward so that the winding roller moves up and down; an elevating member that is screwed onto the ball screw; 2. The rolling test device for flexible materials according to claim 1, further comprising: an elevating bracket for connecting the rolling unit and the elevating member.

4. The control unit a condition input unit into which the length of the flexible material, the thickness of the flexible material, and the diameter of the winding roller are input as condition information; a rotation number calculation unit that calculates the rotation number of the winding roller using the condition information; a rolling distance calculation unit that uses the condition information and the number of rotations to calculate a rolling distance by which the other side of the flexible material slides and moves by the sliding unit in accordance with the number of rotations; a lifting distance calculation unit that calculates a lifting distance by which the winding roller moves up and down in accordance with the rotation speed using the condition information and the rotation speed; 4. The flexible material rolling test device according to claim 1, further comprising: a drive control unit that controls the operation of the rolling unit, the sliding unit, and the lifting unit using the rotation speed, the rolling distance, and the lifting distance so that the inclination of the flexible material is adjusted between the rolling unit and the sliding unit.

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