Lifting device and electrode sheet transport device using same

Abstract

A lifting device and an electrode sheet transfer device using the same are disclosed. A lifting device according to one embodiment of the present invention is a device for lifting a sheet-type member, comprising: a main suction plate that adsorbs the central portion by making surface contact with the central portion of the sheet-type member; a sub suction plate that adsorbs the edge portion by making surface contact with the edge portion of the sheet-type member located on the outer side of the central portion; and a lifting unit that is respectively connected to the main suction plate and the sub suction plate to raise or lower the main suction plate and the sub suction plate, wherein the lifting unit may be configured to raise the main suction plate and the sub suction plate when the main suction plate and the sub suction plate adsorb the sheet-type member, but to raise the sub suction plate before the main suction plate.

Description

Technology Field

[0001] The present invention relates to a lifting device and an electrode sheet transfer device using the same, and more specifically, to a lifting device that adsorbs and raises a sheet-shaped member and an electrode sheet transfer device using the same. Background Technology

[0002] Generally, an electrode assembly for a secondary battery capable of repeated charging and discharging is manufactured by stacking or winding multiple laminated structures in which a separator is interposed between a first electrode corresponding to the cathode and a second electrode corresponding to the anode. To automate the manufacturing process of such an electrode assembly, a transfer device for transporting sheet-shaped electrodes or separators is required.

[0003] However, as disclosed in Japanese Registered Patent Publication No. 5667127, the existing technology for transporting a sheet-type member by adsorbing it with a suction plate has a problem in that, during the process of adsorbing and lifting the sheet-type member, the pressure generated by the sheet-type member coming into face-to-face contact with a table or other member located underneath the sheet-type member causes the sheet-type member to fail to be adsorbed or to be dropped. To solve this problem, if the suction force of the suction plate is increased to lift the sheet-type member, there is a risk of causing deformation or damage to the sheet-type member.

[0004] Furthermore, the existing technology has a problem in that, even when bending occurs in the edge portion of the sheet-type member, the flat suction surface of the suction plate is pressed directly against the sheet-type member to suction the sheet-type member, which causes wrinkles in the sheet-type member or fails to suction the sheet-type member due to a gap between the suction plate and the sheet-type member. The problem to be solved

[0005] The technical problem that the present invention aims to solve is to provide a lifting device that easily adsorbs and separates a sheet-type member in face-to-face contact with a table or other member without deformation or damage, and an electrode sheet transfer device using the same.

[0006] Another technical problem that the present invention aims to solve is to provide a lifting device that safely raises a sheet-type member without adsorption failure and without causing wrinkles in the sheet-type member even when bending occurs in the edge portion of the sheet-type member, and an electrode sheet transfer device using the same. means of solving the problem

[0007] A lifting device according to one embodiment of the present invention is a device for lifting a sheet-type member, comprising: a main suction plate that adsorbs the central portion by making surface contact with the central portion of the sheet-type member; a sub suction plate that adsorbs the edge portion by making surface contact with the edge portion of the sheet-type member located on the outer side of the central portion; and a lifting unit that is respectively connected to the main suction plate and the sub suction plate to raise or lower the main suction plate and the sub suction plate, wherein the lifting unit may be configured to raise the main suction plate and the sub suction plate when the main suction plate and the sub suction plate adsorb the sheet-type member, but to raise the sub suction plate before the main suction plate.

[0008] In one embodiment, the lifting device may include a plurality of sub-adhesive plates, wherein at least one first sub-adhesive plate among the plurality of sub-adhesive plates adsorbs a one-sided edge portion of the sheet-shaped member, and at least one second sub-adhesive plate among the plurality of sub-adhesive plates adsorbs a other-sided edge portion of the sheet-shaped member located opposite the one-sided portion.

[0009] In one embodiment, the lifting unit may include a first lifting unit that raises the one end of the sub-adhesive plate to a first height, among the one end of the sub-adhesive plate located on the edge side of the sheet-type member and the other end of the sub-adhesive plate located on the center side of the sheet-type member, when the main adhesive plate and the sub-adhesive plate adsorb the sheet-type member.

[0010] In one embodiment, the first lifting unit may include: a first guide rail extending in a horizontal direction; a first moving module moving along the first guide rail; and a first support leg having one end connected to the first moving module and the other end connected to the sub suction plate to support the sub suction plate, and raising the one end of the sub suction plate or lowering the raised one end according to the direction of movement of the first moving module.

[0011] In one embodiment, the first support leg may have at least one joint.

[0012] In one embodiment, the lifting unit may further include a second lifting unit that raises the main suction plate and the sub suction plate to a second height when the one end of the sub suction plate is raised to the first height.

[0013] In one embodiment, the lifting device may further include a posture adjustment unit that connects the sub-suction plate and the lifting unit and adjusts the posture of the sub-suction plate according to the curvature or inclination of the edge portion to which the sub-suction plate contacts.

[0014] In one embodiment, the posture adjustment unit may include an elastic member coupled to the sub-suction plate; and a support frame coupled to the lifting unit and supporting the elastic member.

[0015] In one embodiment, the elastic member may include a plurality of compression springs, one end of which is fixed to the sub-adhesive plate and the other end of which is fixed to the support frame.

[0016] In one embodiment, the lifting device (100) may further include a flattening unit that flattens the sheet-shaped member using a roll before the main suction plate and the sub-suction plate come into contact with the sheet-shaped member.

[0017] In one embodiment, the flattening unit may include a second guide rail extending in a horizontal direction; a second moving module moving along the second guide rail; and a second support leg having one end connected to the second moving module and the other end connected to the roll to support the roll.

[0018] An electrode sheet transfer device according to one embodiment of the present invention may be configured to transfer an electrode sheet using a lifting device according to any one of the embodiments described above. Effects of the invention

[0019] According to the present invention, when a main suction plate adsorbed to the central part of a sheet-type member and a sub-suction plate adsorbed to the edge part of the sheet-type member are adsorbed to the sheet-type member, a lifting unit raises the main suction plate and the sub-suction plate, but raises the sub-suction plate before the main suction plate, thereby allowing the sheet-type member in face-to-face contact with a table or other member to be easily adsorbed and separated without deformation or damage.

[0020] In addition, the posture adjustment unit connecting the sub-suction plate and the lifting unit adjusts the posture of the sub-suction plate according to the curvature of the sheet-type member, thereby enabling the sheet-type member to be safely lifted without suction failure and without causing wrinkles in the sheet-type member even when curvature occurs in the edge portion of the sheet-type member.

[0021] In addition, before the main suction plate and the sub-suction plate come into contact with the sheet-type member, the flattening unit flattens the sheet-type member using a roll, thereby ensuring the accuracy and reliability of the suction operation performed by the main suction plate and the sub-suction plate and improving the suction performance.

[0022] Furthermore, a person skilled in the art to which the present invention pertains will readily understand from the following description that various embodiments according to the present invention can solve various technical problems not mentioned above. Brief explanation of the drawing

[0023] FIG. 1 is a perspective view showing an electrode sheet transfer device according to one embodiment of the present invention. FIG. 2 is a perspective view showing a lifting device according to one embodiment of the present invention. Figure 3 is a front view showing the lifting device illustrated in Figure 2. Figure 4 is a diagram showing the electrode sheet adsorption operation of the lifting device illustrated in Figure 3. Figure 5 is a diagram showing the adsorption operation of a modified electrode sheet of the lifting device illustrated in Figure 3. FIGS. 6 and FIGS. 7 are drawings illustrating the electrode sheet lifting operation of the lifting device shown in FIGS. 4. FIG. 8 is a drawing showing a lifting device according to a modified embodiment of the present invention. Figure 9 is a diagram showing the electrode sheet flattening operation of the lifting device illustrated in Figure 8. Specific details for implementing the invention

[0024] Hereinafter, embodiments according to the present invention will be described in detail with reference to the accompanying drawings to clarify solutions corresponding to the technical problems of the present invention. However, in describing the present invention, if a description of related prior art would obscure the essence of the present invention, such description may be omitted. Furthermore, terms used in this specification are defined considering their functions in the present invention, and these may vary depending on the intentions or conventions of designers, manufacturers, etc. Therefore, the definitions of terms described below should be based on the content throughout this specification.

[0025] FIG. 1 shows a perspective view of an electrode sheet transfer device (10) according to one embodiment of the present invention.

[0026] As illustrated in FIG. 1, an electrode sheet transfer device (10) according to one embodiment of the present invention is a device for adsorbing and transferring an electrode sheet, and may include a lifting device (100) and a robot arm (200) according to the present invention.

[0027] The lifting device (100) above may be configured to adsorb and raise or lower an electrode sheet used in manufacturing an electrode assembly of a secondary battery. As will be explained again below, the lifting device (100) may include an adsorption unit (100) that adsorbs the electrode sheet and a lifting unit (120, 130) that raises or lowers the adsorption unit (100).

[0028] In this specification, "electrode sheet" may refer to various sheet-type members used in the manufacture of secondary batteries. For example, "electrode sheet" may refer to a positive electrode sheet, a negative electrode sheet, or a separator sheet, etc.

[0029] The robot arm (200) may be configured to move the lifting device (100) from its current position to a target position. To this end, the robot arm (200) may be configured as a multi-joint robot arm of various types. For example, the robot arm (200) may include a plurality of joints that rotate in a horizontal direction, such as a SCARA (Selective Compliance Assembly Robot Arm).

[0030] In one embodiment, the robot arm (200) may include a first arm unit (210), a second arm unit (220), and a support unit (230).

[0031] In this case, the first arm unit (210) may be configured to support the lifting device (100) by being coupled with the lifting unit (130) of the lifting device (100) and to move the lifting device (100) by rotating around the first axis (A1).

[0032] The second arm unit (220) may be configured to support the first arm unit (210) and rotate around the second axis (A2) to move the first arm unit (210).

[0033] The support unit (230) may be configured to be fixed at a predetermined position to support the second arm unit (220).

[0034] A first axis (A1) corresponding to the rotation center of the first arm unit (210) and a second axis (A2) corresponding to the rotation center of the second arm unit (220) may be configured to be parallel to each other. According to an embodiment, the first axis (A1) and the second axis (A2) may be configured to be orthogonal to each other or to intersect at a specific angle.

[0035] FIG. 2 shows a perspective view of a lifting device (100) according to one embodiment of the present invention.

[0036] As illustrated in FIG. 2, a lifting device (100) according to one embodiment of the present invention is a device that raises or lowers a sheet-type member, such as an electrode sheet, by adsorbing it, and may include an adsorption unit (110), a lifting unit (120, 130), and a posture control unit (140).

[0037] The above-described adsorption unit (110) may be configured to adsorb a sheet-type member. To this end, the adsorption unit (110) may include a main adsorption plate (112) and a sub-adsorption plate (114). In particular, the adsorption unit (110) may include a plurality of the sub-adsorption plates (114).

[0038] The main suction plate (112) may be configured to adsorb the central portion of a sheet-type member by making surface contact with the central portion of the sheet-type member. To this end, a plurality of fine intake ports through which air is drawn may be provided on the bottom surface of the main suction plate (112). Additionally, an air passage communicating with the fine intake ports may be provided inside the main suction plate (112).

[0039] The sub-suction plate (114) may be configured to adsorb the edge portion of the sheet-type member by making surface contact with the edge portion of the sheet-type member located on the outer side of the central portion. To this end, a plurality of fine intake ports through which air is drawn may be provided on the bottom surface of the sub-suction plate (114). Additionally, an air passage communicating with the fine intake ports of the sub-suction plate (114) may be provided inside the sub-suction plate (114).

[0040] Additionally, the sub-suction plate (114) may be configured to have a smaller size and area than the main suction plate (112). This is because the main suction plate (112) is primarily intended to provide suction force for transporting a sheet-type member, whereas the sub-suction plate (114) is primarily intended to lift only the edge portion of the sheet-type member to dissipate pressure caused by the sheet-type member coming into face-to-face contact with a table or other member.

[0041] As previously mentioned, the suction unit (110) of the lifting device (100) may include a plurality of the sub-suction plates (114) described above. In this case, the plurality of sub-suction plates may be arranged adjacent to the main suction plate (112), such that at least one first sub-suction plate among the plurality of sub-suction plates suctions the edge portion of one end of the sheet-type member, and at least one second sub-suction plate among the plurality of sub-suction plates suctions the edge portion of the other end of the sheet-type member located opposite the one end.

[0042] For example, the adsorption unit (110) may include two first sub-adsorption plates positioned adjacent to one end of the main adsorption plate (112) as shown in FIG. 2, and two second sub-adsorption plates positioned adjacent to the other end of the main adsorption plate (112) opposite to the one end.

[0043] In one embodiment, the lifting device (100) may further include a pump (not shown) that generates negative pressure inside the air passage of the main suction plate (112) and the sub suction plate (114) so ​​that air is sucked in through the fine intake ports of the main suction plate (112) and the sub suction plate (114).

[0044] The above lifting units (120, 130) may be configured to be connected to the main suction plate (112) and the sub suction plate (114), respectively, to raise or lower the main suction plate (112) and the sub suction plate (114).

[0045] In particular, the lifting unit (120, 130) may be configured to raise the main suction plate (112) and the sub suction plate (114) when the main suction plate (112) and the sub suction plate (114) adsorb a sheet-type member, such that the sub suction plate (114) is raised before the main suction plate (112). To this end, the lifting unit (120, 130) may include a first lifting unit (120) and a second lifting unit (130).

[0046] The first lifting unit (120) may be configured to be connected to a sub-suction plate (114) and to support the sub-suction plate (114). Additionally, the first lifting unit (120) may be configured to raise one end of the sub-suction plate (114) located on the edge side of the sheet-type member and the other end of the sub-suction plate (114) located on the center side of the sheet-type member to a first height or to lower the raised one end back to its original position.

[0047] For example, when the main suction plate (112) and the sub suction plate (114) suction a sheet-type member, the first lifting unit (120) can raise one end of the sub suction plate (114) located on the edge side of the sheet-type member and the other end of the sub suction plate (114) located on the center side of the sheet-type member to a first height while maintaining the main suction plate (112).

[0048] To this end, the first lifting unit (120) may include a guide rail (122), a moving module (124), and a support leg (126).

[0049] The guide rail (122) is supported by the vertical movement frame (132) of the second lifting unit (130) described later and can be configured to extend in a horizontal direction (X-axis direction).

[0050] The above-mentioned moving module (124) may be configured to move in a horizontal direction (X-axis direction) along a guide rail (122). To this end, the moving module (124) may include a driving motor or actuator that generates power.

[0051] One end of the support leg (126) is connected to the moving module (124), and the other end is connected to the sub suction plate (114) directly or indirectly through the posture adjustment unit (140) described later to support the sub suction plate (114), and may be configured to raise one end of the sub suction plate (114) or lower the raised one end depending on the direction of movement of the moving module (124). To this end, the support leg (126) may be provided with at least one joint (126a).

[0052] The second lifting unit (130) can be coupled to and supported by the first arm unit (210) of the robot arm (200) described above, and can be configured to raise or lower the main suction plate (112) and the sub suction plate (114) together.

[0053] For example, when one end of the sub-suction plate (114) is raised to a first height by the first lifting unit (120), the second lifting unit (130) can raise the main suction plate (112) and the sub-suction plate (114) together to a second height.

[0054] To this end, the second lifting unit (130) may include a vertical moving frame (132) and a driving module (134).

[0055] The above-mentioned vertical moving frame (132) supports the main suction plate (112) and the guide rail (122) of the first lifting unit (120), and can be configured to be movable in a vertical direction (Z-axis direction). Of course, this vertical moving frame (132) can be configured in various forms.

[0056] The above-described drive module (134) is coupled to and supported by the first arm unit (210) of the robot arm (200) described above, and may be configured to move the vertical movement frame (132) in a vertical direction (Z-axis direction). To this end, the drive module (134) may include a motor or actuator, etc., capable of moving the vertical movement frame (132) upward or downward.

[0057] The above posture adjustment unit (140) connects the sub suction plate (114) and the first lifting unit (120), and may be configured to adjust the posture of the sub suction plate (114) according to the curvature or inclination of the edge portion of the sheet-type member to which the sub suction plate (114) contacts.

[0058] In particular, the posture adjustment unit (140) may be configured to adjust the posture of the sub-suction plate (114) by using an elastic member (142) coupled to the sub-suction plate (114).

[0059] In this case, the posture adjustment unit (140) may include an elastic member (142) coupled to a sub-suction plate (114), and a support frame (144) coupled to a support leg (126) of the first lifting unit (120) to support the elastic member (142).

[0060] Additionally, the elastic member (142) may include a plurality of compression springs, one end of which is fixed to a sub-adhesive plate (114) and the other end of which is fixed to a support frame (144).

[0061] In addition, the support frame (144) can be configured in various forms. That is, the support frame (144) can be configured in a plate form as shown in FIG. 2, and can also be configured in a ring form or a cone form depending on the embodiment.

[0062] In FIG. 3, the lifting device (100) of FIG. 2 is shown in a front view.

[0063] As illustrated in FIG. 3, the lifting device (100) may include a main suction plate (112), a sub suction plate (114), a first lifting unit (120), a second lifting unit (130), and a posture adjustment unit (140).

[0064] The main suction plate (112) may be configured to adsorb the central portion of the electrode sheet (S) by making surface contact with the central portion of the electrode sheet (S). As described above, a plurality of fine intake ports for air intake may be provided on the bottom surface (112a) of the main suction plate (112) that makes surface contact with the electrode sheet (S).

[0065] The above sub-adhesive plate (114) may be configured to adsorb the edge portion of the electrode sheet (S) by making surface contact with the edge portion of the electrode sheet (S) located outside the central portion of the electrode sheet (S). As described above, a plurality of fine intake ports for air intake may be provided on the bottom surface (114a) of the sub-adhesive plate (114) that makes surface contact with the electrode sheet (S).

[0066] Additionally, the lifting device (100) may include a plurality of the sub-adhesive plates (114). For example, the lifting device (100) may include at least one sub-adhesive plate positioned adjacent to one end of the main adhesive plate (112) to adsorb the edge portion of one end of the electrode sheet (S), and at least one sub-adhesive plate positioned adjacent to the other end of the main adhesive plate (112) to adsorb the edge portion of the other end of the electrode sheet (S).

[0067] The sub-suction plate (114) is connected to a posture control unit (140), and the posture control unit (140) can be connected to a first lifting unit (120). That is, the sub-suction plate (114) can be indirectly connected to and supported by the first lifting unit (120) by the posture control unit (140). On the other hand, the main suction plate (112) can be directly connected to and supported by the second lifting unit (130).

[0068] The first lifting unit (120) can be connected to and supported by the second lifting unit (130), and the second lifting unit (130) can be connected to and supported by the first arm unit (210) of the robot arm (200) described above.

[0069] This lifting device (100) can be moved by the robot arm (200) described above and positioned above the electrode sheet (S) placed on the table (T).

[0070] Figure 4 illustrates the electrode sheet adsorption operation of the lifting device (100) shown in Figure 3.

[0071] As illustrated in FIG. 4, the lifting device (100) can perform an electrode sheet adsorption operation above the electrode sheet (S) placed on the table (T).

[0072] That is, the vertical moving frame (132) of the second lifting unit (130) moves downward so that the main suction plate (112) and the sub suction plate (114), which are directly or indirectly supported by the vertical moving frame (132), can come into surface contact with the electrode sheet (S).

[0073] Next, the main suction plate (112) and the sub suction plate (114) can each suck in air through fine intake ports provided on their bottom surfaces to adsorb the electrode sheet (S). At this time, the main suction plate (112) adsorbs the central part of the electrode sheet (S), and the sub suction plate (114) adsorbs the edge part of the electrode sheet (S).

[0074] FIG. 5 is a diagram showing the modified electrode sheet adsorption operation of the lifting device (100) illustrated in FIG. 3.

[0075] As shown in FIG. 5, even when a bend occurs in the edge portion of the electrode sheet (S') placed on the table (T), the lifting device (100) can accurately perform the electrode sheet adsorption operation.

[0076] That is, when the vertical moving frame (132) of the second lifting unit (130) moves downward and the main suction plate (112) and sub suction plate (114), which are directly or indirectly supported by the vertical moving frame (132), come into contact with the electrode sheet (S'), the posture adjustment unit (140) can adjust the posture of the sub suction plate (114) according to the curvature or inclination of the corresponding edge portion by utilizing the elastic force of the elastic member (142) combined with the sub suction plate (114).

[0077] As a result, the sub-adhesive plate (114) can stably make surface contact with the edge portion of the electrode sheet (S') that has a bend and adsorb the edge portion.

[0078] FIGS. 6 and 7 illustrate the electrode sheet lifting operation of the lifting device shown in FIG. 4.

[0079] As illustrated in FIG. 6, when the main suction plate (112) and the sub suction plate (114) suction the electrode sheet (S), the first lifting unit (120) can raise one end of the sub suction plate (114) located on the edge side of the electrode sheet (S) and the other end of the sub suction plate (114) located on the center side of the electrode sheet (S) to a first height while maintaining the main suction plate (112).

[0080] That is, the first lifting unit (120) can raise the left end of the sub-suction plate located to the left of the main suction plate (112) in FIG. 6 and the right end of the sub-suction plate located to the right of the main suction plate (112) to a first height, respectively.

[0081] In this case, the moving module (124) of the first lifting unit (120) moves along the guide rail (122) toward the center of the electrode sheet (S), thereby moving the support leg (126) connected to the moving module (124) in the same direction.

[0082] Then, the lower part of the support leg (126) is rotated at a predetermined angle around the joint (126a) to raise the one end of the sub-suction plate (114) to a first height. As a result, the center part of the electrode sheet (S) remains on the table (T), and only the edge part of the electrode sheet (S) is raised obliquely.

[0083] Next, as illustrated in FIG. 7, when one end of the sub-suction plate (114) is raised to a first height, the vertical moving frame (132) of the second lifting unit (130) moves upward, so that the main suction plate (112) and the sub-suction plate (114), which are directly or indirectly supported by the vertical moving frame (132), can be raised to a second height.

[0084] In this way, when the lifting device (100) adsorbs and raises the electrode sheet (S), the robot arm (200) described above can transport the electrode sheet (S) by moving the lifting device (100) to a target position.

[0085] The lifting device (100) that has arrived at the target position can place the electrode sheet (S) at the target position by moving the vertical moving frame (132) of the second lifting unit (130) downward again and moving the moving module (124) of the first lifting unit (120) back to its original position.

[0086] FIG. 8 illustrates a lifting device (100A) according to a modified embodiment of the present invention.

[0087] As illustrated in FIG. 8, a lifting device (100A) according to a modified embodiment of the present invention may include a main suction plate (112), a sub-suction plate (114), a first lifting unit (120), a second lifting unit (130), and a posture adjustment unit (140) as described with reference to FIG. 2 through 7. In particular, the lifting device (100A) may further include a flattening unit (150).

[0088] The flattening unit (150) may be configured to flatten the electrode sheet (S) using a roll (152) before the main suction plate (112) and the sub suction plate (114) come into contact with the electrode sheet (S) corresponding to the sheet-type member.

[0089] For example, a lifting device (100A) located above a curved electrode sheet (S) can flatten the electrode sheet (S) by driving the flattening unit (150) before driving the second lifting unit (130) to lower the main suction plate (112) and the sub suction plate (114) toward the electrode sheet (S).

[0090] To this end, the leveling unit (150) may include a guide rail (154), a moving module (156), and a support leg (158).

[0091] The guide rail (154) is supported by the second lifting unit (130) and can be configured to extend in a horizontal direction (X-axis direction).

[0092] The above-mentioned moving module (156) may be configured to move in a horizontal direction (X-axis direction) along a guide rail (154). To this end, the moving module (156) may include a driving motor or actuator that generates power.

[0093] The support leg (158) may be configured such that one end is connected to the moving module (156) and the other end is connected to the roll (152) to support the roll (152).

[0094] FIG. 9 illustrates the electrode sheet flattening operation of the lifting device (100A) shown in FIG. 8.

[0095] As illustrated in FIG. 9, when the lifting device (100A) is positioned above the electrode sheet (S) by the robot arm (200) described above, the second lifting unit (130) of the lifting device (100A) can lower the flattening unit (150) and bring the roll (152) of the flattening unit (150) into close contact with the electrode sheet (S) before lowering the main suction plate (112) and the sub suction plate (114) toward the electrode sheet (S).

[0096] Then, the flattening unit (150) can flatten the electrode sheet (S) by moving the roll (152) left and right while the roll (152) is in close contact with the electrode sheet (S).

[0097] In this case, the moving module (156) of the flattening unit (150) moves along the guide rail (154) in the left and right direction (X-axis direction), and can perform a flattening operation by moving the support leg (158) connected to the moving module (156) and the roll (152) supported by the support leg (158) in the left and right direction.

[0098] Afterwards, the lifting device (100A) can perform the electrode sheet adsorption operation and the electrode sheet lifting operation described with reference to FIGS. 4 to 7.

[0099] As described above, according to the present invention, when a main suction plate (112) adsorbed to the central part of a sheet-type member and a sub-suction plate (114) adsorbed to the edge part of the sheet-type member are adsorbed to the sheet-type member, a lifting unit (120, 130) raises the main suction plate (112) and the sub-suction plate (114), and raises the sub-suction plate (114) before the main suction plate (112), the sheet-type member that is in face-to-face contact with a table or other member can be easily adsorbed and separated without deformation or damage.

[0100] In addition, the posture adjustment unit (140) connecting the sub-suction plate (114) and the first lifting unit (120) adjusts the posture of the sub-suction plate (114) according to the curvature of the sheet-type member, thereby allowing the sheet-type member to be safely lifted without suction failure and without causing wrinkles in the sheet-type member even when curvature occurs in the edge portion of the sheet-type member.

[0101] In addition, before the main suction plate (112) and the sub suction plate (114) come into contact with the sheet-type member, the flattening unit (150) flattens the sheet-type member using a roll (152), thereby ensuring the accuracy and reliability of the suction operation performed by the main suction plate (112) and the sub suction plate (114) and improving the suction performance.

[0102] Furthermore, it is obvious that the embodiments according to the present invention can solve various other technical problems in the relevant technical field as well as related technical fields other than those mentioned in this specification.

[0103] The present invention has been described above with reference to specific embodiments. However, those skilled in the art will clearly understand that various modified embodiments may be implemented within the technical scope of the present invention. Therefore, the embodiments disclosed above should be considered in an illustrative rather than a restrictive sense. That is, the true technical scope of the present invention is set forth in the claims, and all variations within the scope of equivalents should be interpreted as being included in the present invention. Explanation of the symbols

[0104] 100: Lifting device 110: Suction unit 112: Main suction cup 114: Sub suction cup 120: 1st lifting unit 122: Guide rail 124: Moving module 126: Support leg 130: 2nd lifting unit 132: Vertical movement frame 134: Drive module 140: Attitude control unit 142: Elastic member 144: Support frame 150: Leveling unit 200: Robot arm 210: 1st Arm Unit 220: 2nd Arm Unit 230 : Support unit

Claims

Claim 1 A lifting device for raising and lowering a sheet-type member, comprising: a main suction plate that contacts the central portion of the sheet-type member and adsorbs the central portion; a sub suction plate that contacts the edge portion of the sheet-type member located on the outer side of the central portion and adsorbs the edge portion; and a lifting unit each connected to the main suction plate and the sub suction plate to raise or lower the main suction plate and the sub suction plate, wherein the lifting unit is configured to raise the main suction plate and the sub suction plate when the main suction plate and the sub suction plate adsorb the sheet-type member, but to raise the sub suction plate before the main suction plate. The lifting device further comprises a flattening unit that flattens the sheet-type member using a roll before the main suction plate and the sub suction plate come into contact with the sheet-type member, wherein the flattening unit comprises: a second guide rail extended in a horizontal direction; and a second moving module that moves along the second guide rail. A lifting device comprising a second support leg, one end of which is connected to the second moving module and the other end of which is connected to the roll to support the roll. Claim 2 A lifting device according to claim 1, wherein the device comprises a plurality of sub-adhesive plates, wherein at least one first sub-adhesive plate among the plurality of sub-adhesive plates adsorbs a one-sided edge portion of the sheet-shaped member, and at least one second sub-adhesive plate among the plurality of sub-adhesive plates adsorbs a other-sided edge portion of the sheet-shaped member located opposite the one-sided portion. Claim 3 A lifting device according to claim 1, wherein the lifting unit comprises a first lifting unit that raises the one end of the sub-adhesive plate located on the edge side of the sheet-shaped member and the other end of the sub-adhesive plate located on the center side of the sheet-shaped member to a first height when the main adhesive plate and the sub-adhesive plate adsorb the sheet-shaped member. Claim 4 A lifting device according to claim 3, wherein the first lifting unit comprises: a first guide rail extending in a horizontal direction; a first moving module moving along the first guide rail; and a first support leg having one end connected to the first moving module and the other end connected to the sub suction plate to support the sub suction plate, and raising the one end of the sub suction plate or lowering the raised one end according to the direction of movement of the first moving module. Claim 5 A lifting device according to claim 4, wherein the first support leg is characterized by having at least one joint. Claim 6 A lifting device according to paragraph 3, wherein the lifting unit further comprises a second lifting unit that raises the main suction plate and the sub suction plate to a second height when the one end of the sub suction plate is raised to the first height. Claim 7 A lifting device according to claim 1, further comprising a posture adjustment unit that connects the sub-suction plate and the lifting unit and adjusts the posture of the sub-suction plate according to the curvature or inclination of the edge portion to which the sub-suction plate contacts. Claim 8 A lifting device according to claim 7, wherein the posture adjustment unit comprises: an elastic member coupled to the sub-suction plate; and a support frame coupled to the lifting unit and supporting the elastic member. Claim 9 A lifting device according to claim 8, wherein the elastic member comprises a plurality of compression springs, one end of which is fixed to the sub-adhesive plate and the other end of which is fixed to the support frame. Claim 10 delete Claim 11 delete Claim 12 An electrode sheet transfer device that transfers an electrode sheet using a lifting device according to any one of claims 1 to 9.

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