Magnetic lift device

Abstract

The present invention relates to a magnetic lift device, comprising a main body made of a metal material having a first adsorption surface and a second adsorption surface formed on the left and right sides of a groove formed along the longitudinal direction in the center of the bottom surface, a first through hole formed in the center, and a first magnetic shielding means made of a non-magnetic material installed along the vertical direction above and below the first through hole in the interior, and a plurality of unit plates installed spaced apart at a certain interval along the front-rear direction; a fixed permanent magnet part comprising at least one first fixed permanent magnet disposed between the unit plates corresponding to the upper part of the first adsorption surface having a polarity different from the front-rear, and at least one second fixed permanent magnet disposed between the unit plates corresponding to the upper part of the second adsorption surface having a polarity different from the front-rear, and disposed such that a polarity different from the first fixed permanent magnet faces forward; and a second through hole formed in the center, disposed between the first fixed permanent magnet and the second fixed permanent magnet among the unit plates having a polarity different from the front-rear, wherein the first adsorption surface A permanent magnet rotating body formed by dividing at least one first permanent magnet, positioned in an area corresponding to the upper portion such that a polarity opposite to that of the first fixed permanent magnet faces forward, and at least one second permanent magnet, positioned in an area corresponding to the upper portion of the second adsorption surface such that a polarity opposite to that of the second fixed permanent magnet faces forward; a rotating shaft coupled through the first through hole and the second through hole, wherein one side of the outer surface is supported on one side of the inner surface of the permanent magnet rotating body having the second through hole formed therein and rotates together with the permanent magnet rotating body; and a lever part having one end coupled to one side of the rotating shaft, wherein the rotating shaft is rotated between a first position in which the first permanent magnet is positioned on the upper portion of the first adsorption surface and the second permanent magnet is positioned on the upper portion of the second adsorption surface, and a second position in which the first permanent magnet is positioned on the upper portion of the second adsorption surface and the second permanent magnet is positioned on the upper portion of the first adsorption surface, wherein each unit plate has a mutual spacing of 5 to 12 mm formed,Each is characterized by having a thickness of 5 to 12 mm. According to the present invention as described above, by improving the main body structure of the magnetic lift device so that a plurality of magnetic regions with a narrow width and shallow depth are formed on the lower part of the adsorption surface of the main body, a relatively thin object to be adsorbed can be adsorbed more reliably. In addition, since the present invention can adsorb an object with a relatively thin thickness using a magnetic force corresponding to its weight, the problem of the object being magnetized by residual magnetic flux generated by adsorbing with a magnetic force higher than the magnetic force capable of adsorbing it does not occur.

Description

Technology Field

[0001] The present invention relates to a magnetic lift device, and more specifically, to a magnetic lift device that improves the main body structure of the magnetic lift device so that a plurality of narrow and shallow magnetic regions are formed on the lower part of the adsorption surface of the main body, thereby enabling the magnetic lift device to adsorb objects with a relatively thin thickness with a magnetic force corresponding to their weight. Background Technology

[0002] Generally, magnetic lift devices are used to transport or load steel plates or steel-based objects using magnetic force, and they are widely used in various industrial settings.

[0003] FIG. 1 schematically illustrates a conventional magnetic lift device, and FIG. 2 (a) and (b) are drawings to explain the operating principle of a conventional magnetic lift device.

[0004] Referring to FIG. 1, a conventional magnetic lift device comprises a base (2) equipped with a lifting hook (1), a non-magnetic isolation plate (3), a plurality of ferromagnetic plates (4) formed symmetrically on the left and right sides around a non-magnetic member (11) and spaced apart at regular intervals, a fixed permanent magnet (5) inserted between ferromagnetic plates (4) having opposite polarities on one side and a side corresponding to one side, a rotating permanent magnet (6) formed symmetrically on the left and right sides around a non-magnetic member (11) and inserted between the plurality of ferromagnetic plates (4), a rotating shaft (7) connecting the rotating permanent magnets (6), and a lever (not shown) coupled to the rotating shaft (7).

[0005] As shown in FIG. 2(a), the above-described conventional magnetic lift device rotates the rotation axis (7) by 180° using a lever so that the polarity of the fixed permanent magnet (5) and the rotating permanent magnet (6) between the multiple ferromagnetic plates (4) becomes the same, and a structure in which the polarity of the fixed permanent magnet (5) and the rotating permanent magnet (6) are arranged in the same way is continuously arranged along the front-rear direction.

[0006] Accordingly, the magnetic force from the N pole of each fixed permanent magnet (5) and rotating permanent magnet (6) passes through the ferromagnetic plate (4) in contact with it and the object to be adsorbed (8), and forms a magnetic flux flow that enters the ferromagnetic plate (4) in contact with the S pole of each fixed permanent magnet (5) and rotating permanent magnet (6) and the S pole of each fixed permanent magnet (5) and rotating permanent magnet (6), thereby enabling the object to be adsorbed (8) to be adsorbed.

[0007] And, as seen in Fig. 2(b), if the rotation axis (7) is rotated 0° or 360° using a lever so that the polarity of the fixed permanent magnet (5) and the rotating permanent magnet (6) between the multiple ferromagnetic plates (4) is opposite, a structure in which the polarity of the fixed permanent magnet (5) and the rotating permanent magnet (6) is arranged oppositely is continuously arranged along the front and rear directions.

[0008] Accordingly, the magnetic force from the N pole of the fixed permanent magnet (5) and the rotating permanent magnet (6) flows to the S pole of the fixed permanent magnet (5) and the rotating permanent magnet (6) that are in contact with the same surface as the ferromagnetic plate (4), so that no magnetic force is generated flowing to the object to be adsorbed (8), and thus the object to be adsorbed (8) cannot be adsorbed.

[0009] Meanwhile, in the above-described conventional magnetic lift device, the thickness of the ferromagnetic plate (4) is not only thick, but the spacing between the ferromagnetic plates (4) is also formed relatively wide, so a wide and deep magnetic region is formed at the bottom of the ferromagnetic plate (4). Consequently, when a relatively thin object to be adsorbed is adsorbed, a problem arises in which the object to be adsorbed becomes magnetized by the residual magnetic flux generated by adsorbing it with a magnetic force higher than the magnetic force capable of adsorbing the object. The problem to be solved

[0010] The present invention has been devised to solve the above-mentioned problems, and the objective of the present invention is to provide a magnetic lift device that can adsorb objects with a relatively thin thickness using magnetic force corresponding to their weight by improving the main body structure of the magnetic lift device so that a plurality of narrow and shallow magnetic regions are formed on the lower part of the adsorption surface of the main body. means of solving the problem

[0011] According to the present invention for achieving the above objective, the invention comprises a main body including a plurality of unit plates installed spaced apart at a certain interval along the front-rear direction, wherein a first adsorption surface and a second adsorption surface are formed on the left and right sides of a groove formed along the longitudinal direction in the center of the bottom surface made of a metal material, a first through hole is formed in the center, and a first magnetic shielding means made of a non-magnetic material is installed along the vertical direction above and below the first through hole inside, and the main body includes a plurality of unit plates, each unit plate having a polarity different from the front and rear and disposed between the unit plates corresponding to the upper part of the first adsorption surface, and a fixed permanent magnet part including at least one first fixed permanent magnet having a polarity different from the front and rear and disposed between the unit plates corresponding to the upper part of the second adsorption surface, and disposed such that a polarity different from the first fixed permanent magnet faces forward, and a fixed permanent magnet part having a polarity different from the front and rear and disposed between the first fixed permanent magnet and the second fixed permanent magnet among the unit plates, wherein a second through hole is formed in the center, and in an area corresponding to the upper part of the first adsorption surface A permanent magnet rotating body having at least one first permanent magnet positioned such that a polarity opposite to that of the first fixed permanent magnet faces forward, and at least one second permanent magnet positioned such that a polarity opposite to that of the second fixed permanent magnet faces forward in an area corresponding to the upper portion of the second adsorption surface, wherein the first permanent magnet is formed by division and coupled through the first and second through holes, and one side of the outer surface is supported on one side of the inner surface of the permanent magnet rotating body having the second through hole formed therein and rotates together with the permanent magnet rotating body, and a lever part having one end coupled to one side of the rotating shaft, wherein the lever part rotates the rotating shaft between a first position in which the first permanent magnet is positioned on the upper portion of the first adsorption surface and the second permanent magnet is positioned on the upper portion of the second adsorption surface, and a second position in which the first permanent magnet is positioned on the upper portion of the second adsorption surface and the second permanent magnet is positioned on the upper portion of the first adsorption surface, wherein each unit plate is formed with a mutual spacing of 5 to 12 mm.A magnetic lift device is provided, characterized in that each thickness is formed to be 5 to 12 mm.

[0012] Here, the first fixed permanent magnet and the second fixed permanent magnet are formed in multiple numbers, and the permanent magnet rotating body may include a rotating plate disposed between the first fixed permanent magnet and the second fixed permanent magnet among the unit plates and having a second through hole formed in the center, a first permanent magnet disposed at a certain interval along the inner circumference of the rotating plate corresponding to the upper part of the first adsorption surface and having a number corresponding to the first fixed permanent magnet, and a second permanent magnet disposed at a certain interval along the inner circumference of the rotating plate corresponding to the upper part of the second adsorption surface and having a number corresponding to the second fixed permanent magnet.

[0013] In addition, it may further include a position fixing part formed on one side of at least one of the main body or the lever part, and which supports one side of the lever part on one side of the main body to fix the lever part at any position between the first position and the second position.

[0014] In addition, it may further include a magnetic shielding part installed along the circumference of the rotating plate as a non-magnetic material. Effects of the invention

[0015] According to the present invention as described above, by improving the main body structure of the magnetic lift device so that a plurality of magnetic regions with a narrow width and shallow depth are formed on the lower part of the adsorption surface of the main body, a relatively thin object to be adsorbed can be adsorbed more reliably.

[0016] In addition, since the present invention can adsorb an object with a relatively thin thickness using a magnetic force corresponding to its weight, the problem of the object being magnetized by residual magnetic flux generated by adsorbing with a magnetic force higher than the magnetic force capable of adsorbing it does not occur. Brief explanation of the drawing

[0017] FIG. 1 schematically illustrates a conventional magnetic lift device. FIGS. 2(a) and (b) are drawings for explaining the operating principle of a conventional magnetic lift device, FIG. 3 is a perspective view of a magnetic lift device according to an embodiment of the present invention, FIG. 4 is an exploded perspective view of a magnetic lift device according to one embodiment of the present invention, FIG. 5 is a partially exploded perspective view of a magnetic lift device according to one embodiment of the present invention, FIGS. 6a, 6b and FIGS. 7a, 7b are drawings for explaining the operation of a magnetic lift device according to an embodiment of the present invention. FIG. 8 is a perspective view of a magnetic lift device according to another embodiment of the present invention, FIG. 9 is an exploded perspective view of a magnetic lift device according to another embodiment of the present invention, FIG. 10 is a partially exploded perspective view of a magnetic lift device according to another embodiment of the present invention, FIG. 11 is a cross-sectional view of a lever portion of a magnetic lift device according to another embodiment of the present invention, FIGS. 12, FIGS. 13, and FIGS. 14 (a) and (b) are drawings for explaining the operation of a magnetic lift device according to another embodiment of the present invention. Specific details for implementing the invention

[0018] The present invention will be described in more detail below with reference to the drawings. It should be noted that identical components in the drawings are indicated by the same reference numerals wherever possible. Furthermore, detailed descriptions of known functions and configurations that could unnecessarily obscure the essence of the invention are omitted.

[0019] FIG. 3 is a perspective view of a magnetic lift device according to one embodiment of the present invention, FIG. 4 is an exploded perspective view of a magnetic lift device according to one embodiment of the present invention, and FIG. 5 is a partially exploded perspective view of a magnetic lift device according to one embodiment of the present invention.

[0020] Referring to FIGS. 3 to 5, a magnetic lift device (1) according to one embodiment of the present invention includes a main body (10), a fixed permanent magnet part (20), a permanent magnet rotating body (30), a rotating shaft (40), and a lever part (50).

[0021] The main body (10) is made of metal and has a first adsorption surface (11a) and a second adsorption surface (11b) formed on the left and right sides of a groove (H) formed along the longitudinal direction in the center of the bottom surface, and a first through hole (11c) formed in the center through which a rotation shaft (40) described later is connected, and a first magnetic shielding means (12) made of a non-magnetic material is installed along the vertical direction in the upper and lower parts of the first through hole (11c) inside, and includes a plurality of unit plates (11) installed at a certain distance apart along the front and rear directions.

[0022] As shown in FIG. 4, the unit plates (11) are characterized by having a narrow gap (D) between adjacent unit plates (11) of 5-12 mm and a relatively thin thickness (T) of each unit plate (11) of 5-12 mm, so that a plurality of narrow and shallow magnetic regions can be formed between adjacent first adsorption surfaces (11a) and adjacent second adsorption surfaces (11b).

[0023] Meanwhile, the first magnetic shielding means (12) is formed in a rectangular block shape and is inserted and installed inside each unit plate (11). This first magnetic shielding means (12) serves to prevent the magnetic force of the first fixed permanent magnet (21) and the second fixed permanent magnet (22), which are described later and are placed on the upper portions of the first adsorption surface (11a) and the second adsorption surface (11b), and the first permanent magnet (31) and the second permanent magnet (32), from interfering with each other on the first adsorption surface (11a) and the second adsorption surface (11b).

[0024] And, on both sides of the front lower portion of the unit plate (11) positioned at the forefront, a pair of stoppers (11d) are formed protruding to limit the rotation radius of the lever portion (50) described later.

[0025] Additionally, the main body (10) further includes an upper fixing cover (13) and a side fixing cover (14) for fixing the upper surface and both sides of each unit plate (11).

[0026] In addition, the main body (10) has a lifting hook (15a) formed on one side to which a hook of a transport means such as a hoist is coupled, and further includes a gripping means (15) coupled to the upper surface of the upper surface fixing cover (13).

[0027] The fixed permanent magnet part (20) includes a first fixed permanent magnet (21) disposed between the unit plate (11) corresponding to the upper part of the first adsorption surface (11a), and a second fixed permanent magnet (22) disposed between the unit plate (11) corresponding to the upper part of the second adsorption surface (11b).

[0028] Here, the first fixed permanent magnet (21) and the second fixed permanent magnet (22) have different polarities in the front and back directions, and are arranged so that the different polarities face forward.

[0029] The permanent magnet rotating body (30) is in the shape of a disc and has different polarities on the front and back sides, and is positioned between the first fixed permanent magnet (21) and the second fixed permanent magnet (22) among the unit plates (11). A second through hole (30a) is formed in the center through which a rotating shaft (40), described later, is connected. A pair of support parts (30aa) are formed on both sides of the inner surface opposite to where the second through hole (30a) is formed, which are supported by the support surface (41) of the rotating shaft (40). When the rotating shaft (40) rotates, the support parts (30aa) rotate together with the rotating shaft (40).

[0030] In this permanent magnet rotating body (30), a first permanent magnet (32) is positioned on the upper part of the first adsorption surface (11a) such that the polarity opposite to that of the first fixed permanent magnet (21) faces forward, and a second permanent magnet (33) is positioned on the upper part of the second adsorption surface (11b) such that the polarity opposite to that of the second fixed permanent magnet (22) faces forward, by means of a magnetic shielding means (31) made of a non-magnetic material formed along the upper and lower parts of the second through hole (30a).

[0031] The rotation axis (40) is coupled to a first through hole (11c) formed in each unit plate (11) and a second through hole (30a) formed in each permanent magnet rotating body (30), and a pair of support surfaces (41) are formed along the longitudinal direction on both sides of the outer surface corresponding to a pair of support members (30aa) formed in the permanent magnet rotating body (30). These pair of support surfaces (41) are supported by the pair of support members (30aa) to rotate the permanent magnet rotating body (30) together.

[0032] And, the rotation axis (40) is installed so that the shear portion is exposed to the front of the unit plate (11) positioned at the forefront.

[0033] The lever portion (50) is in the shape of a roughly circular rod, with one end inserted into the front end of the rotation shaft (40) and fixedly coupled to the front end of the rotation shaft (40) through a fastening means such as a bolt, and the other end extending outward to provide a gripping area to the user.

[0034] Here, the lever portion (50) is coupled to one side of the front portion of the rotation shaft (40) and further includes a separate protective cover (51) to protect the coupling area between the lever portion (50) and the rotation shaft (40).

[0035] This lever part (50) serves to rotate the permanent magnet rotating body (30) between a first position in which a first permanent magnet (32), with a polarity different from that of the first fixed permanent magnet (21) facing forward, is positioned on the upper part of the first adsorption surface (11a) and a second permanent magnet (33), with a polarity different from that of the second fixed permanent magnet (22) facing forward, is positioned on the upper part of the second adsorption surface (11b), and a second position in which a second permanent magnet (33), with a polarity the same as that of the first fixed permanent magnet facing forward, is positioned on the upper part of the first adsorption surface (11a) and a first permanent magnet (32), with a polarity the same as that of the second fixed permanent magnet (22) facing forward, is positioned on the upper part of the second adsorption surface (11b).

[0036] FIGS. 6a, 6b and FIGS. 7a, 7b are drawings for explaining the operation of a magnetic lift device according to an embodiment of the present invention.

[0037] As shown in FIGS. 6a and 6b, in a state where the lever portion (50) is positioned in a first position, the S pole of the first fixed permanent magnet (21) positioned on the upper part of the first adsorption surface (11a) is positioned to face forward, and the N pole of the first permanent magnet (32) is positioned to face forward.

[0038] Accordingly, the magnetic force emanating from the respective N poles of the first fixed permanent magnet (21) and the first permanent magnet (32) passes through the adjacent unit plates (11) that are in contact with each and enters into the respective S poles, thereby forming a magnetic force that circulates within the adjacent unit plates (11), so that the object to be adsorbed cannot be adsorbed through the first adsorption surface (11a).

[0039] Meanwhile, FIG. 6b is a view of FIG. 6a from the left, and although it has been explained that a magnetic force circulating inside an adjacent unit plate (11) is formed by the first fixed permanent magnet (21) and the first permanent magnet (32) placed on the upper part of the first adsorption surface (11a), the second fixed permanent magnet (22) and the second permanent magnet (33) placed on the upper part of the second adsorption surface (11b) are formed with polarities facing forward that are opposite to those of the first fixed permanent magnet (21) and the first permanent magnet (32), and thus, just like the first fixed permanent magnet (21) and the first permanent magnet (32), different polarities are arranged facing forward to form a magnetic force circulating inside an adjacent unit plate, so a detailed explanation thereof is omitted.

[0040] And, as shown in FIGS. 7a and 7b, in the magnetic lift device according to one embodiment of the present invention, when the lever part (50) is rotated 180° and positioned in the second position, the N poles of the first fixed permanent magnet (21) and the second permanent magnet (33) placed on the upper part of the first adsorption surface (11a) are arranged to face forward.

[0041] Accordingly, a portion of the first adsorption surface (11a) of the unit plate (11) in contact with the N pole of the first fixed permanent magnet (21) and the second permanent magnet (33) of the adjacent unit plate (11) is induced to the N pole, and a portion of the first adsorption surface (11a) of the unit plate (11) in contact with the S pole of the first fixed permanent magnet (21) and the second permanent magnet (33) of the adjacent unit plate (11) is induced to the S pole, thereby forming a magnetic force that circulates from the first adsorption surface (11a) induced to the N pole of the adjacent unit plate (11) toward the direction of the first adsorption surface (11a) induced to the S pole, so that an object to be adsorbed can be adsorbed through the first adsorption surface (11a).

[0042] Meanwhile, FIG. 7b is a view of FIG. 7a from the left, and although it has been explained that a magnetic force circulating between the first adsorption surfaces (11a) of adjacent unit plates (11) is formed by the first fixed permanent magnet (21) and the second permanent magnet (33) placed on the upper part of the first adsorption surface (11a), the second fixed permanent magnet (22) and the first permanent magnet (32) placed on the upper part of the second adsorption surface (11b) are formed with the polarity facing forward opposite to that of the first fixed permanent magnet (21) and the second permanent magnet (33), and are arranged with the same polarity facing forward just like the first fixed permanent magnet (21) and the second permanent magnet (33), so a detailed explanation of this is omitted.

[0043] In particular, in a magnetic lift device according to one embodiment of the present invention, the gap (D) between adjacent unit plates (11) is formed narrowly to 5-12 mm, and the thickness (T) of each unit plate (11) is formed relatively thinly to 5-12 mm, so that a plurality of magnetic regions with a narrow width and shallow depth are formed at the bottom of the first adsorption surface (11a) of adjacent unit plates (11) and at the bottom of the second adsorption surface (11b) of adjacent unit plates (11).

[0044] As described above, the magnetic lift device according to one embodiment of the present invention can more reliably adsorb objects with a relatively thin thickness by improving the structure of the main body so that a plurality of magnetic fields with a narrow width and shallow depth are formed on the lower part of the adsorption surface of the main body.

[0045] In addition, since the present invention can adsorb an object with a relatively thin thickness using a magnetic force corresponding to its weight, the problem of the object being magnetized by residual magnetic flux generated by adsorbing with a magnetic force higher than the magnetic force capable of adsorbing it does not occur.

[0046] FIG. 8 is a perspective view of a magnetic lift device according to another embodiment of the present invention, FIG. 9 is an exploded perspective view of a magnetic lift device according to another embodiment of the present invention, FIG. 10 is a partially exploded perspective view of a magnetic lift device according to another embodiment of the present invention, and FIG. 11 is a cross-sectional view of a lever portion of a magnetic lift device according to another embodiment of the present invention.

[0047] Referring to FIGS. 8 to 11, the magnetic lift device (1) according to another embodiment of the present invention differs from the first embodiment of the present invention in that a plurality of first fixed permanent magnets (21) and second fixed permanent magnets (22) of the fixed permanent magnet part (20) are arranged, the structure of the permanent magnet rotating body (30') is partially different, and a magnetic shielding part (60) for shielding the magnetic force between the fixed permanent magnet part (20) and the permanent magnet rotating body (30') and a position fixing part (70) for fixing the lever part (50) at an arbitrary position between the first position and the second position are added. The remaining configuration is the same as the first embodiment of the present invention, so a detailed description thereof is omitted.

[0048] The fixed permanent magnet section (20) includes a plurality of first fixed permanent magnets (21) disposed between unit plates (11) corresponding to the upper part of the first adsorption surface (11a), and a plurality of second fixed permanent magnets (22) disposed between unit plates (11) corresponding to the upper part of the second adsorption surface (11b).

[0049] Here, the first fixed permanent magnet (21) and the second fixed permanent magnet (22) have different polarities in the front and back directions, and are arranged so that the different polarities face forward.

[0050] The permanent magnet rotating body (30') includes a rotating plate (31'), a first permanent magnet (32'), and a second permanent magnet (33').

[0051] The rotating plate (31') is in the shape of a disc and has a second through hole (31a') formed in the center through which the rotating shaft (40), described later, is connected. A pair of support members (31aa') are formed on both sides of the inner surface opposite to where the second through hole (31a') is formed, which are supported by the support surface (41) of the rotating shaft (40), so that when the rotating shaft (40) rotates, they rotate together with the rotating shaft (40).

[0052] Additionally, the rotating plate (31') has insertion holes (31b') formed at regular intervals along its inner circumference, into which a first permanent magnet (32') and a second permanent magnet (33') are inserted. Among these insertion holes (31b'), a number of first insertion holes (31ba') corresponding to the first fixed permanent magnet (21) are formed at a position corresponding to the upper part of the first adsorption surface (11a), and a number of second insertion holes (31bb') corresponding to the second fixed permanent magnet (22) are formed at a position corresponding to the upper part of the second adsorption surface (11b).

[0053] The first permanent magnet (32') is inserted and installed in a first insertion hole (31ba') formed at a position corresponding to the upper part of the first adsorption surface (11a), and has different polarities in the front and back, and is arranged so that the polarity opposite to that of the first fixed permanent magnet (21) faces forward.

[0054] The second permanent magnet (33') is inserted and installed in the second insertion hole (31bb') formed at a position corresponding to the upper part of the second adsorption surface (11b), and has different polarities in the front and back, and is positioned so that the polarity opposite to that of the second fixed permanent magnet (22) faces forward.

[0055] The magnetic shielding part (60) is made of a non-magnetic material and is installed along the circumference of the rotating plate (31'), and by shielding the magnetic force between the first fixed permanent magnet (21) and the second fixed permanent magnet (22) and the first permanent magnet (32') and the second permanent magnet (33'), it serves to prevent the first fixed permanent magnet (21) and the second fixed permanent magnet (22) from deviating from a preset installation position due to the attractive or repulsive force with the first permanent magnet (32') and the second permanent magnet (33').

[0056] The position fixing part (70) is for fixing the lever part (60) at any position between the first position and the second position by supporting one side of the lever part (60) on one side of the main body (10), and includes a fixing bracket (71) and a support means (72).

[0057] The fixed bracket (71) is a plate-shaped member installed on one side of the front of the unit plate (11) positioned at the forefront, and a plurality of locking grooves (71a) are formed along the rotation radius of the lever part (60) that rotates between the first position and the second position.

[0058] The support means (72) is installed so as to be movable along the longitudinal direction of the lever part (60) on one side of the lever part (60) corresponding to the locking groove (71a) of the fixed bracket (71), and is intended to support the lever part (60) at any position between the first position and the second position by engaging or disengaging the locking groove (71a) of the fixed bracket (71). As shown in FIG. 6, it includes a locking piece (72a), an elastic member (72b), an extension bar (72c), and a pressure bar (72d).

[0059] The locking piece (72a) is movably installed inside one end of the lever part (60), and a locking projection (72aa) corresponding to the locking groove (71a) of the fixing bracket (71) is installed on one side of the outer surface so as to be exposed to the outside of the lever part (60).

[0060] The elastic member (72b) is interposed between the locking piece (72a) and one side of the inner surface of the lever part (60), and provides elastic force to the locking piece (72a) in a direction in which the locking projection (72aa) is engaged with the locking groove (71a) of the fixed bracket (71), thereby serving to maintain the state in which the locking projection (72aa) is engaged with the locking groove (71a) of the fixed bracket (71) when the pressure applied to the pressure bar (72d) described later is released.

[0061] The extension bar (72c) is installed inside the lever part (60), with one end connected to one side of the locking piece (72a) and the other end extended in the direction of the other end of the lever part (60).

[0062] The pressure bar (72d) is inserted and coupled to the other end of the lever part (60), and when a pressure force is applied from the outside by pressing operation, it presses the other end of the extension bar (72c) to press the locking piece (72a), thereby causing the locking projection (72aa) that is locked and coupled to the locking groove (71a) of the fixed bracket (71) to be detached from the locking groove (71a) of the fixed bracket (71).

[0063] FIGS. 12, FIGS. 13 and FIGS. 14 (a) and (b) are drawings for explaining the operation of a magnetic lift device according to another embodiment of the present invention.

[0064] In a magnetic lift device according to another embodiment of the present invention, as seen in FIG. 12 (a), when the lever part (50) is positioned in the first position, as seen in FIG. 12 (b), the magnetic force of the N pole of the first fixed permanent magnet (21) having a corresponding number and the S pole of the first permanent magnet (32') are mutually canceled out, so that the first adsorption surface (11a) is induced to be non-polar, and the magnetic force of the S pole of the second fixed permanent magnet (22) having a corresponding number and the N pole of the second permanent magnet (33') are mutually canceled out, so that the second adsorption surface (11b) is induced to be non-polar, so that the object to be adsorbed (P) cannot be adsorbed through the first adsorption surface (11a) and the second adsorption surface (11b).

[0065] And, in the magnetic lift device according to another embodiment of the present invention, as shown in FIG. 13 (a), when the lever portion (50) is rotated 180° counterclockwise and positioned in the second position, as shown in FIG. 13 (b), the magnetic force of the N pole of the first fixed permanent magnet (21) having a corresponding number and the N pole of the second permanent magnet (33') is added together to induce the first adsorption surface (11a) to the N pole, and the magnetic force of the S pole of the second fixed permanent magnet (22) having a corresponding number and the S pole of the first permanent magnet (32') is added together to induce the second adsorption surface (11b) to the S pole, so that a magnetic force circulating from the first adsorption surface (11a) to the second adsorption surface (11b) is formed at the bottom of the first adsorption surface (11a) and the second adsorption surface (11b), through the first adsorption surface (11a) and the second adsorption surface (11b) It becomes possible to adsorb the object to be adsorbed (P).

[0066] Here, at the second position mentioned above, the entire second permanent magnet (33'), which has the same polarity as the first fixed permanent magnet (21), moves to the upper part of the first adsorption surface (11a), so that the first adsorption surface (11a) is induced to the N pole, which has the greatest magnetic force, and the entire first permanent magnet (32'), which has the same polarity as the second fixed permanent magnet (22), moves to the upper part of the second adsorption surface (11b), so that the second adsorption surface (11b) is induced to the S pole, which has the greatest magnetic force, so that the maximum magnetic force is generated at the second position.

[0067] Additionally, in a magnetic lift device according to another embodiment of the present invention, as shown in FIG. 14 (a), when the lever portion (50) is positioned at an arbitrary position rotated by a certain angle in a counterclockwise direction by the position fixing means (70), as shown in FIG. 14 (b), one second permanent magnet (33') having the same polarity as the N pole of the first fixed permanent magnet (21) moves to the upper part of the first adsorption surface (11a), so that the first adsorption surface (11a) is induced to the N pole where the magnetic force strength is weakest, and one first permanent magnet (32') having the same polarity as the S pole of the second fixed permanent magnet (22) moves to the upper part of the second adsorption surface (11b), so that the second adsorption surface (11b) is induced to the S pole where the magnetic force strength is weakest, so that a magnetic force lower than the maximum magnetic force is formed at the lower part of the first adsorption surface (11a) and the second adsorption surface (11b), the weight corresponding to the maximum magnetic force A first object to be adsorbed (P') with a weight lower than that of the object to be adsorbed (P) can be adsorbed with a corresponding magnetic force.

[0068] When the lever portion (50) is gradually rotated counterclockwise in the manner described above, as the number of second permanent magnets (33') moving to the upper part of the first adsorption surface (11a) and the number of first permanent magnets (32') moving to the upper part of the second adsorption surface (11b) increases, the strength of the magnetic force formed on the lower part of the first adsorption surface (11a) and the second adsorption surface (11b) gradually increases, thereby making it possible to easily adsorb objects of various weights corresponding to the magnetic force.

[0069] As described above, the magnetic lift device according to another embodiment of the present invention can adsorb objects of various weights with a single device using a magnetic force corresponding to their weights. Therefore, not only is the problem of the object being magnetized by residual magnetic flux generated by adsorbing with a magnetic force higher than that capable of adsorbing the object of the corresponding weight not to occur, but the cost of purchasing equipment can be significantly reduced because there is no need to provide multiple magnetic lift devices for adsorbing objects of various weights.

[0070] Although the present invention has been described in relation to the preferred embodiments above, various modifications and variations are possible without departing from the essence and scope of the invention. Accordingly, the appended claims will include such modifications and variations that fall within the essence of the invention. Explanation of the symbols

[0071] 1 : Magnetic lift device 10 : Main body 11: Unit plate 11a: First adsorption surface 11b: Second adsorption surface 11c: First through hole 11d : Stopper 12 : First magnetic shielding means 13: Top fixing cover 14: Side fixing cover 20: Fixed permanent magnet part 21: First fixed permanent magnet 22: Second fixed permanent magnet 30: Permanent magnet rotating body 30a : Second through hole 30aa : Support part 31: Second magnetic shielding means 32: First permanent magnet 33: Second permanent magnet 30': Permanent magnet rotating body 31' : Rotating plate 31a' : Second through hole 31aa' : Support part 31b' : Insertion hole 31ba' : 1st insertion hole 31bb' : 2nd insertion hole 32' : 1st permanent magnet 32' : 2nd permanent magnet 40 : Rotation axis 41 : Support surface 50 : Lever part 51 : Protective cover 60 : Magnetic shielding part 70 : Position fixing part 71 : Fixing bracket 71a : Locking groove 72a : Locking piece 72b : Elastic member 72c : Extension bar 72d : Pressure bar H : Home

Claims

Claim 1 A main body comprising a plurality of unit plates installed at a certain interval along the front-rear direction, wherein a first adsorption surface and a second adsorption surface are formed on the left and right sides of a groove formed along the longitudinal direction in the center of the bottom surface made of a metal material, a first through hole is formed in the center, and a first magnetic shielding means made of a non-magnetic material is installed along the vertical direction above and below the first through hole inside; a fixed permanent magnet part comprising a plurality of first fixed permanent magnets disposed between the unit plates corresponding to the upper part of the first adsorption surface having different polarities in the front and rear, and a plurality of second fixed permanent magnets disposed between the unit plates corresponding to the upper part of the second adsorption surface having different polarities in the front and rear and arranged such that a polarity different from that of the first fixed permanent magnet faces forward; a rotating plate disposed between the unit plates and disposed between the first fixed permanent magnet and the second fixed permanent magnet and having a second through hole formed in the center, and the inner circumference of the rotating plate corresponding to the upper part of the first adsorption surface having different polarities in the front and rear A permanent magnet rotating body comprising: a first permanent magnet arranged at regular intervals and positioned such that a polarity different from that of the first fixed permanent magnet faces forward and has a number corresponding to that of the first fixed permanent magnet; a second permanent magnet arranged at regular intervals along the inner circumference of the rotating plate corresponding to the upper part of the second adsorption surface, having a polarity different from that of the second fixed permanent magnet and positioned such that a polarity different from that of the second fixed permanent magnet faces forward and has a number corresponding to that of the second fixed permanent magnet; and a rotating shaft that is coupled through the first through hole and the second through hole, wherein one side of the outer surface is supported on one side of the inner surface of the permanent magnet rotating body where the second through hole is formed, and rotates together with the permanent magnet rotating body.A magnetic lift device comprising: a lever portion that rotates the rotation axis between a first position in which the first permanent magnet is positioned on the upper part of the first adsorption surface and the second permanent magnet is positioned on the upper part of the second adsorption surface, and a second position in which the first permanent magnet is positioned on the upper part of the second adsorption surface and the second permanent magnet is positioned on the upper part of the first adsorption surface; a position fixing portion formed on at least one side of the main body or the lever portion, and which supports one side of the lever portion to one side of the main body to fix the lever portion at any position between the first position and the second position; and a magnetic shielding portion made of a non-magnetic material and installed along the circumference of the rotation plate, wherein each unit plate is formed with a spacing of 5 to 12 mm between them and a thickness of 5 to 12 mm. Claim 2 delete Claim 3 delete Claim 4 delete

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