WO2007073108A1

WO2007073108A1 - Coupling apparatus for moving concrete structure

Info

Publication number: WO2007073108A1
Application number: PCT/KR2006/005640
Authority: WO
Inventors: Il Do Chang
Original assignee: Il Do Chang
Priority date: 2005-12-22
Filing date: 2006-12-22
Publication date: 2007-06-28
Also published as: KR100635216B1

Abstract

A locking device for moving a concrete structure comprises an insertion member having a head part, a body part and a bed part, and embedded into the concrete structure to directly apply external lifting force to the concrete structure; and a connection member having a coupler part locked to the head part of the insertion member, and a locking ring part extending vertically upward from the coupler part to be locked to a lifting hook of an external lifting apparatus.

Description

COUPLING APPARATUS FOR MOVING CONCRETE

STRUCTURE

Technical Field

[1] The present invention relates to a locking device for moving a concrete structure, and more particularly, to a locking device for moving a concrete structure, wherein the lifting hook of an external lifting apparatus can be conveniently and easily locked to the locking device when conducting a locking operation for moving a concrete structure, so that the locking operation can be simplified and workability can be improved, wherein the likelihood of the occurrence of an accident is eliminated by solving the problem of a conventional locking device, in which the lifting hook of the external lifting apparatus is likely to be released by an external shock or due to imbalance occurring while the concrete structure is moved, wherein the distal end of the head part of the locking device is positioned lower than the surface of the concrete structure to allow concrete structures to be stacked into multiple layers when storing and moving concrete structures, so that the storing and moving costs can be significantly reduced, wherein it is possible to prevent cracks from being formed and the outer appearance of the concrete structure from being deteriorated due to stress concentration induced due to the presence of the projecting ring of the conventional locking device, wherein it is not necessary to remove the projecting ring using an oxygen welding set after installation of the concrete structure, so that labor and equipment costs can be greatly reduced, and wherein the outer appearance of the concrete structure after installation can be improved by putting mortar in the gap defined between the head part and the concrete structure. Background Art

[2] As is generally known in the art, since concrete structures, used in the construction of panels, walls, beams, partitions, etc. weigh several tons or several tens of tons, they must be lifted, moved and assembled using a separately provided lifting apparatus such as a large crane.

[3] In the conventional art, two methods of lifting a concrete structure are used. In the first method, in a state in which a wire rope is put around a concrete structure, the concrete structure is moved by an external lifting apparatus such as a crane. In the second method, in a state in which the ring or the anchor projecting out of a concrete structure is hung on the hook or the rope of the external lifting apparatus, the concrete structure is moved by the external lifting apparatus.

[4] However, in the first method, the locking operation that is conducted in order to move the concrete structure is complex, labor-intensive and dangerous. In the second method, the hook or the rope is likely to be released from the concrete structure due to external shocks or vibrations. Also, because the ring or the anchor is exposed to the outside, there are drawbacks in that a plurality of concrete structures cannot be stored or moved while being stacked upon one another, and in that the ring or the anchor should be removed using an oxygen welding set after installation of the concrete structure.

[5] In order to cope with these problems, an insert anchor for pulling up a concrete mass has been disclosed in Korean Utility Model Registration No. 191011, and a hanger set for a concrete assembly has been disclosed in Korean Utility Model Registration No. 229791.

[6] In Korean Utility Model Registration No. 191011, directed to an insert anchor for pulling up a concrete mass, the lower end of the embedded part, which is embedded into a concrete mass, is bent to increase the coupling force between the insert anchor and the concrete mass. However, since the distal end of the insert anchor is exposed to the outside, conventional problems still occur in that concrete masses cannot be stacked upon one another and in that the insert anchor must be removed through a separate operation.

[7] In Korean Utility Model Registration No. 229791, directed to a hanger set for a concrete assembly, an anchor and a hanger are separately provided, and an anchor fastener is employed so that the distal end of the anchor is not exposed outside of a concrete assembly. Nevertheless, since the anchor and the hanger are not securely coupled to each other, if external shocks or vibrations occur, or if the center of gravity becomes imbalanced, while moving the concrete assembly, the hanger is likely to be released from the anchor, whereby the likelihood of an accident increases.

[8] Therefore, a novel locking device for moving a concrete structure which overcomes the above problems is required in the art. Disclosure of Invention Technical Problem

[9] Accordingly, the present invention has been made in an effort to solve the problems occurring in the related art, and an object of the present invention is to provide a locking device for moving a concrete structure, wherein the lifting hook of an external lifting apparatus can be conveniently and easily locked to the locking device when conducting a locking operation for moving a concrete structure, so that the locking operation can be simplified and workability can be improved, and wherein the likelihood of the occurrence of an accident is eliminated by solving the problem with the conventional locking device, in which the lifting hook of the external lifting apparatus is likely to be released by external shocks or due to imbalance occurring while the concrete structure is moved.

[10] Another object of the present invention is to provide a locking device for moving a concrete structure, wherein the distal end of the head part of the locking device is positioned lower than the surface of the concrete structure to allow concrete structures to be stacked into multiple layers when storing and moving concrete structures, so that the storing and moving costs can be significantly reduced, wherein it is not necessary to remove the projecting ring using an oxygen welding set after installation of the concrete structure, so that labor and equipment costs can be greatly reduced, and wherein the outer appearance of the concrete structure after installation can be improved by putting mortar in the gap defined between the head part and the concrete structure. Technical Solution

[11] In order to achieve the above objects, according to one aspect of the present invention, there is provided a locking device for moving a concrete structure, comprising an insertion member having a head part, a body part and a bed part, and embedded into the concrete structure to directly apply external lifting force to the concrete structure; and a connection member having a coupler part locked to the head part of the insertion member, and a locking ring part extending vertically upward from the coupler part to be locked to a lifting hook of an external lifting apparatus, the head part of the insertion member having the shape of a quadrangle, a circle with at least one ear, an oval, or a cone.

[12] According to another aspect of the present invention, there is provided a locking device for moving a concrete structure, comprising an insertion member having a head part, a body part and a bed part, and embedded into the concrete structure to directly apply external lifting force to the concrete structure; and a connection member having a coupler part locked to the head part of the insertion member, and a locking ring part extending vertically upward from the coupler part to be locked to a lifting hook of an external lifting apparatus, wherein the coupler part of the connection member comprises a coupler body which defines a frame, an insertion opening which has substantially the same sectional shape as the head part to allow the head part to be initially inserted therethrough, a guide groove which defines a passage along which the head part can be rotated, a open section which accommodates the head part inserted through the insertion opening, and an engagement piece which is arranged in the open section to be engaged with the head part through rotation of the connection member about a Z- axis.

[13] According to another aspect of the present invention, there is provided a locking device for moving a concrete structure, comprising an insertion member having a head part, a body part and a bed part, and embedded into the concrete structure to directly apply external lifting force to the concrete structure; and a connection member having a coupler part locked to the head part of the insertion member, and a locking ring part extending vertically upward from the coupler part to be locked to a lifting hook of an external lifting apparatus, wherein the coupler part of the connection member comprises a coupler body which defines a frame, an insertion opening which has substantially the same sectional shape as the head part to allow the head part to be initially inserted therethrough, and a guide groove which accommodates the head part inserted through the insertion opening and guides the head part in one direction so that the head part is engaged in the guide groove to be supported therein.

[14] According to another aspect of the present invention, the locking device further comprises auxiliary securing means installed in one sidewall or both sidewalls of the coupler part so as to prevent reverse rotation or movement of the head part.

[15] According to another aspect of the present invention, the auxiliary securing means comprises a steel ball which is brought into contact with the head part, an elastic spring which abuts the steel ball to apply predetermined biasing force, and a tightening bolt which is threaded into the coupler body of the coupler part and compresses the elastic spring.

[16] According to still another aspect of the present invention, the locking device further comprises a coupler support flange formed so as to be partially or wholly located on the coupler body of the coupler part and brought into contact with the surface of the concrete structure to reduce the load applied to the head part positioned in the coupler part and to prevent rotation of the coupler part.

[17] It is preferred that the head part of the insertion member comprise an eye bolt or an eye nut.

[18] More preferably, the coupler part of the connection member comprises an eye bolt or an eye nut which can be threadedly coupled to the head part, and a support flange, having the shape of a circle, an oval or a quadrangle, is formed between the coupler part and the locking ring part.

[19] According to a still further aspect of the present invention, there is provided a locking device for moving a concrete structure, comprising a head part, a body part and a bed part, and configured to be embedded into the concrete structure to thereby directly apply external lifting force to the concrete structure, the head part having the shape of an Ω or a ring and being locked to a lifting hook of an external lifting apparatus, and the body part being made of a reinforced steel bar or being formed with a plurality of projections on an outer surface thereof. Advantageous Effects

[20] Thanks to the features of the present invention, the lifting hook of an external lifting apparatus can be conveniently and easily locked to the locking device when conducting a locking operation for moving a concrete structure, so that the locking operation can be simplified and workability can be improved. Further, the likelihood of the occurrence of an accident is eliminated by solving the problem with the conventional locking device in which the lifting hook of the external lifting apparatus is likely to be released by an external shock or due to imbalance occurring while the concrete structure is moved, through additionally providing securing means such as an engagement piece or an auxiliary securing means.

[21] Also, the distal end of the head part of the locking device is positioned lower than the surface of the concrete structure to allow concrete structures to be stacked into multiple layers when storing and moving concrete structures, so that the storing and moving costs can be significantly reduced, and it is not necessary to remove the projecting ring using an oxygen welding set after installation of the concrete structure, so that labor and equipment costs can be greatly reduced.

[22] Moreover, the outer appearance of the concrete structure after installation can be improved by putting mortar in the gap defined between the head part and the concrete structure. Brief Description of the Drawings

[23] The above objects, and other features and advantages of the present invention will become more apparent after a reading of the following detailed description taken in conjunction with the drawings, in which:

[24] FIGs. 1 through 7 are perspective views illustrating the embodiments of an insertion member according to the present invention;

[25] FIG. 8 is a side cross-sectional view illustrating the state in which the insertion member according to the present invention is inserted into a concrete structure;

[26] FIGs. 9 through 13 are respectively a perspective view, a front view, a side view, a plan view, and a side cross-sectional view illustrating a connection member according to the present invention;

[27] FIGs. 14 through 18 are respectively a perspective view, a front view, a side view, a plan view, and a bottom view illustrating another embodiment of the connection member according to the present invention;

[28] FIGs. 19 through 21 are respectively a perspective view, a front view, and a side view illustrating a locking device for moving a concrete structure according to the present invention;

[29] FIGs. 22 and 23 are cross-sectional views taken along the lines A-A and B-B of FIGs. 20 and 21, respectively; [30] FIGs. 24 through 26 are respectively a broken-away perspective view, a broken- away front view, and a broken-away side view illustrating the state in which the insertion member according to the present invention is coupled to a form; [31] FIGs. 27 and 28 are exploded and assembled perspective views, respectively, illustrating another embodiment of the locking device for moving a concrete structure according to the present invention; [32] FIG. 29 is a broken-away perspective view illustrating the state in which the insertion member shown in FIGs. 27 and 28 is coupled to a form; [33] FIG. 30 is an exploded perspective view illustrating the state in which auxiliary securing means is additionally provided to the connection member of FIG. 9; [34] FIG. 31 is a perspective view illustrating another embodiment of the connection member according to the present invention;

[35] FIG. 32 is a cross-sectional view taken along the line C-C of FIG. 31;

[36] FIG. 33 is a perspective view illustrating the state in which an insertion member is locked to the connection member of FIG. 31 ; [37] FIG. 34 is a broken-away perspective view of FIG. 33;

[38] FIGs. 35 through 37 are perspective views sequentially illustrating a procedure for locking the insertion member to the connection member in FIG. 33; [39] FIGs. 38 and 39 are perspective views illustrating other embodiments of the insertion member according to the present invention; [40] FIGs. 40 and 41 are perspective views illustrating connection members respectively associated with the insertion members shown in FIGs. 38 and 39; [41] FIGs. 42 and 43 are perspective views illustrating the locking device for moving a concrete structure in which the insertion members shown in FIGs. 38 and 39 and the connection members shown in FIGs. 40 and 41 are installed on molds without using forms; [42] FIG. 44 is a perspective view illustrating still another embodiment of the locking device for moving a concrete structure according to the present invention; [43] FIG. 45 is a perspective view illustrating the use of the locking device for moving a concrete structure according to the present invention; and [44] FIGs. 46 through 48 are respectively a front view, a side view and a plan view of

FIG. 45.

Best Mode for Carrying Out the Invention [45] Reference will now be made in greater detail to a preferred embodiment of the invention, an example of which is illustrated in the accompanying drawings. Wherever possible, the same reference numerals will be used throughout the drawings and the de- scription to refer to the same or like parts.

[46] A locking device 1 for moving a concrete structure in accordance with the present invention includes an insertion member 100 having a head part 110, a body part 130 and a bed part 150, and is embedded into a concrete structure 5 to directly apply external lifting force to the concrete structure 5; and a connection member 200 having a coupler part 210 locked to the head part 110 of the insertion member 100, and a locking ring part 230 extending vertically upward from the coupler part 210 to be locked to the lifting hook 3 of an external lifting apparatus (not shown).

[47] Further, a locking device 1 for moving a concrete structure in accordance with the present invention may comprise a head part 110, a body part 130 and a bed part 150, and may be configured to be embedded into a concrete structure 5 to thereby directly apply external lifting force to the concrete structure 5, the head part 110 having the shape of an Ω or a ring and being locked to the lifting hook 3 of an external lifting apparatus (not shown).

[48] In more detail, the head part 110 of the insertion member 100 may have the shape of a circle with ears on both opposite sides, as shown in FIG. 1, the shape of a circle with a plurality of ears, as shown in FIG. 2, or the shape of a quadrangle, an oval, or a cone, which is not shown in the drawings.

[49] The body part 130 of the insertion member 100 is made of a reinforced steel bar

130a (which means a steel bar having projections formed on the outer surface thereof) as shown in FIG. 3 to improve the coupling or securing force between the concrete structure 5 and the insertion member 100. If such a reinforced steel bar 130a is not used, the same effect can be obtained by forming a plurality of projections on the outer surface of the body part 130.

[50] The bed part 150 of the insertion member 100 is configured to have an area capable of dispersing a load so that the coupling or securing force between the insertion member 100 and the concrete structure 5 is increased and the insertion member 100 is not removed from the concrete structure 5.

[51] The bed part 150 of the insertion member 100 has the physical shape of a circle or an oval, as shown in FIGs. 1 through 4. As the occasion demands, the bed part 150 of the insertion member 100 may be made of a steel plate which has the shape of a quadr angle, as shown in FIGs. 5 and 6, or some other shape.

[52] Also, as shown in FIGs. 4 and 7, a separate auxiliary base member 500 can be additionally provided above and below the bed part 150 to maximize the locking effect. The auxiliary base member 500 can be shaped in the same manner as the bed part 150, as shown in FIG. 4, or can be added under the bed part 150 as a wire net.

[53] The insertion member 100 constructed as mentioned above is inserted into the concrete structure 5 as shown in FIG. 8. At this time, since the head part 110 and a portion of the body part 130 of the insertion member 100 are inserted into a hemispherical form 7, as shown in FIG. 8, they are not embedded into the concrete structure 5. As a consequence, the distal end of the head part 110 is not exposed out of the surface of the concrete structure 5.

[54] The connection member 200 includes the coupler part 210, which is locked to the head part 110 of the insertion member 100, and the locking ring part 230, which is locked to the lifting hook 3 of the external lifting apparatus (not shown).

[55] As shown in FIGs. 9 through 18, the coupler part 210 of the connection member

200 comprises a coupler body 211 which defines a frame, an insertion opening 213 which has substantially the same sectional shape as the head part 110 to allow the head part 110 to be initially inserted therethrough, a space section 215 which accommodates the head part 110, inserted through the insertion opening 213, and an engagement piece 217 which is arranged in the space section 215 to be engaged with the head part 110 through rotation of the connection member 200 around a Z- axis.

[56] Alternatively, as shown in FIGs. 31 and 32, the coupler part 210 of the connection member 200 may comprise a coupler body 211 which defines a frame, an insertion opening 213 which has substantially the same sectional shape as the head part 110 to allow the head part 110 to be initially inserted therethrough, a guide groove 219 which accommodates the head part 110, inserted through the insertion opening 213, and guides the head part 110 in one direction so that the head part 110 is engaged in the guide groove 219 to be supported therein, and a space section 215 which accommodates the head part 110. At this time, preferably, the insertion opening 213 is defined in a manner such that, even when the assembly becomes slightly uncoupled due to external shocks, etc., the head part 110 is prevented from being released, as long as the parts are not in precise positions for disassembly.

[57] It is preferred that the insertion opening 213 be defined vertically or at a predetermined angle with respect to the guide groove 219. At this time, it is preferred that the head part 110 be introduced into the guide groove 219 through rotation of the head part 110 around a Z-axis after the head part 110 is inserted into the insertion opening 213. In other words, it is preferred that the width of the guide groove 219 be less than the width of the insertion opening 213.

[58] Preferably, after the head part 110 is completely moved through the guide groove

219, the head part 110 is accommodated in the space section 215, and the space section 215 is defined in such a way as to allow the head part 110 to be rotated 360° around the Z-axis.

[59] Here, the shape of the coupler body 211 is determined in a manner such that the coupler body 211 can be tightly fitted into the groove 9 defined by the form 7.

[60] In further detail, the connection member 200 having the coupler part 210 shown in FIGs. 9 through 13 is locked to the insertion member 100 having the quadrangular head part 110 shown in FIG. 1. In a detailed procedure, as shown in FIGs. 19 through 26, after the head part 110 of the insertion member 100 is inserted into the insertion opening 213 of the coupler part 210, by rotating the connection member 200 about the Z-axis (that is to say, by rotating the connection member 200 in one direction with respect to the insertion member 100), the head part 110 is moved along the guide groove 219 of the coupler part 210, is then engaged with the engagement piece 217 , and is accommodated in the space section 215 so that it does not rotate further.

[61] Namely, as shown in FIG. 22, if one end of the head part 110 is engaged with and secured to the engagement piece 217, the head part 110 remains engaged with the engagement piece 217 in the space section 215, so that it is not released upon the application of external lifting force.

[62] Further, the connection member 200 having the coupler part 210 shown in FIGs. 14 through 18 is locked to the insertion member 100 having the head part 110 of the circular shape with the plurality of ears, as shown in FIG. 2. In a detailed procedure, the head part 110 can be locked and unlocked through rotation similar to the case of the insertion member 100 having the quadrangular head part 110.

[63] Meanwhile, as shown in FIG. 30, auxiliary securing means 300 can be installed in one or both sidewalls of the coupler body 211 of the coupler part 210, which has the insertion opening 213, the space section 215 and the engagement piece 217, so as to prevent reverse rotation of the head part 110.

[64] In more detail, referring to FIG. 30, the auxiliary securing means 300 comprises a steel ball 300a which is brought into contact with the head part 110, an elastic spring 300b which abuts the steel ball 300a to apply a predetermined biasing force, and a tightening bolt 300c which is threaded into the coupler body 211 of the coupler part 210 and compresses the elastic spring 300b.

[65] The auxiliary securing means 300 constructed in this way is inserted through the coupler body 211 of the coupler part 210, so that, when the head part 110 is reversely rotated from the space section 215 to the guide groove 219 of the coupler part 210 while moving the concrete structure 5, resistance force is adequately applied to prevent the insertion member 100 from being released from the connection member 200.

[66] Moreover, the connection member 200 having the coupler part 210 shown in FIGs.

31 and 32 is locked to the insertion member 100 having the quadrangular head part 100, as shown in FIG. 1. The locked state is illustrated in FIGs. 33 and 34. In a detailed procedure, as shown in FIGs. 35 through 37, after the head part 110 of the insertion member 100 is inserted into the insertion opening 213, which is defined at an angle with respect to the guide groove 219 of the coupler part 210, by rotating the head part 110 about the Z-axis, the head part 110 is aligned with the width of the? guide groove 219. Then, by moving the connection member 200 in one direction along the Y-axis of the coupler part 210, the head part 110 of the insertion member 100 is moved along the guide groove 219 of the connection member 200, and the head part 110 is accommodated in the space section 215. With the head part 110 accommodated in the space section 215, the head part 110 can be rotated through 360° about the Z-axis of the head part 110 in the space section 215.

[67] Here, FIG. 35 illustrates the state in which the head part 110 of the insertion member 100 is inserted into the insertion opening 213 of the coupler part 210, FIG. 36 illustrates the state in which the head part 110, inserted into the insertion opening 213, is guided along the guide groove 219 of the coupler part 210, and FIG. 37 illustrates the state in which the head part 110 is fully moved and the locking of the insertion member 100 and the connection member 200 is completed.

[68] It is preferred that, through rotating the connection member 200 about the Z-axis, that is, in one direction with respect to the head part 110 of the insertion member 100, the contact or engagement area between the guide groove 219 and the head part 110 be increased.

[69] A coupler support flange 212 is installed opposite the insertion opening 213 of the coupler part 210. As a consequence, when the coupling of the coupler part 210 and the insertion member 100 is completed, as the coupler support flange 212 comes into tight contact with the surface of the concrete structure 5 and increases support force, the load applied to the insertion member 100 accommodated in the coupler part 210 can be decreased, whereby structural stability can be improved.

[70] Further, similar to the connection member 200 (see FIG. 30) having the above- described coupler part 210, preferably, auxiliary securing means 300 comprising the steel ball 300a, the elastic spring 300b and the tightening bolt 300c are additionally provided on both sidewalls of the coupler body 211 of the coupler part 210.

[71] By additionally providing the auxiliary securing means 300 in this way, as both sidewalls of the head part 110 are brought into tight contact with the steel balls 300a, the head part 110 is prevented from being reversely moved along the guide groove 219 and from being released from the connection member 200 unless a predetermined magnitude of external force is applied to the head part 110.

[72] Preferably, the head part 110 of the insertion member 100 is not simply formed to have the shape of a quadrangle but is formed with a predetermined taper to be smoothly guided along the guide groove 219 and to increase engagement force.

[73] Meanwhile, the head part 110 of the insertion member 100 may comprise an eye nut or an eye bolt as shown in FIGs. 38 and 39. Also, the coupler part 210 of the connection member 200 which is locked to the insertion member 100 may comprise an eye bolt or an eye nut as shown in FIGs. 40 and 41. [74] At this time, when installing the insertion member 100 on a mold 600, the former 7 can be used (the in-use state being not shown), or as shown in FIGs. 42 and 43, the insertion member 100 and the connection member 200 can be directly locked to the mold 600 to be installed without using the former 7.

[75] At this time, preferably, a support flange 400 having the shape of a circle, an oval or a quadrangle is provided between the coupler part 210 and the locking ring part 230 of the connection member 200 as shown in FIGs. 40 through 43.

[76] Here, the size of the support flange is determined to be greater than the area of the groove 9 which is defined by the former 7.

[77] The reason why the support flange 400 is located between the coupler part 210 and the locking ring part 230 resides in that, when locking the insertion member 100 and the connection member 200, the support flange 400 is brought into tight contact with the outer end of the groove 9 to provide sufficient coupling force.

[78] Meanwhile, referring to FIGs. 44 through 48, a locking device 1 for moving a concrete structure in accordance with the present invention comprises the head part 110, the body part 130 and the bed part 150, and configured to be embedded into the concrete structure 5 to thereby directly apply external lifting force to the concrete structure 5, the head part 110 having the shape of an Ω or a ring and being locked to the lifting hook 3 of the external lifting apparatus (not shown).

[79] That is to say, as shown in FIG. 44, the locking device for moving a concrete structure can be constructed to simultaneously perform the functions of the insertion member 100 and the connection member 200.

[80] Here, the head part 110 can have the shape of a ring as shown in FIG. 44 and be directly locked to the lifting hook 3 of the external lifting apparatus (not shown). Alternatively, the head part 110 can have the shape of an Ω as shown in FIGs. 45 through 48 and be directly locked to the lifting hook 3.

[81] At this time, a plurality of body parts 130 can be provided as shown in FIGs. 46 through 48, and the bed part 150 can be divided into two and be bent.

[82] Of course, as describe above, the body part 130 can be made of a reinforced steel bar 130a, and the separate auxiliary base member 500 can be additionally provided to the bed part 150.

[83] Further, in the case where the head part 100 has the shape of a ring, it is preferred that the coupler part 210 having the shape of a hook be adopted. Industrial Applicability

[84] As is apparent from the above description, the locking device for moving a concrete structure according to the present invention provides advantages in that the lifting hook of an external lifting apparatus can be conveniently and easily locked to the locking device when conducting a locking operation for moving a concrete structure, so that the locking operation can be simplified and workability can be improved. Also, the likelihood of the occurrence of an accident is eliminated by preventing the lifting hook of the external lifting apparatus from being released by an external shock or due to imbalance occurring while the concrete structure is moved.

[85] In the drawings and specification, typical preferred embodiments of the invention have been disclosed and, although specific terms are employed, they are used in a generic and descriptive sense only and not for purposes of limitation, the scope of the invention being set forth in the following claims.

Claims

[1] A locking device for moving a concrete structure, comprising: an insertion member having a head part, a body part and a bed part, and embedded into the concrete structure to directly apply external lifting force to the concrete structure; and a connection member having a coupler part locked to the head part of the insertion member, and a locking ring part extending vertically upward from the coupler part to be locked to a lifting hook of an external lifting apparatus, wherein the coupler part of the connection member comprises a coupler body which defines a frame, an insertion opening which has substantially the same sectional shape as the head part to allow the head part to be initially inserted therethrough, a guide groove which defines a passage along which the head part can be rotated, an open section which accommodates the head part inserted through the insertion opening, and an engagement piece which is arranged in the open section to be engaged with the head part through rotation of the connection member around a Z- axis.

[2] A locking device for moving a concrete structure, comprising: an insertion member having a head part, a body part and a bed part, and embedded into the concrete structure to directly apply external lifting force to the concrete structure; and a connection member having a coupler part locked to the head part of the insertion member, and a locking ring part extending vertically upward from the coupler part to be locked to a lifting hook of an external lifting apparatus, wherein the coupler part of the connection member comprises a coupler body which defines a frame, an insertion opening which has substantially the same sectional shape as the head part to allow the head part to be initially inserted therethrough, and a guide groove which accommodates the head part, inserted through the insertion opening, and guides the head part in one direction so that the head part is engaged in the guide groove to be supported therein.

[3] The locking device according to claim 1 or 2, further comprising: auxiliary securing means installed in one sidewall or both sidewalls of the coupler part so as to prevent reverse rotation or movement of the head part.

[4] The locking device according to claim 3, wherein the auxiliary securing means comprises a steel ball which is brought into contact with the head part, an elastic spring which abuts the steel ball to apply predetermined biasing force, and a tightening bolt which is threaded into the coupler body of the coupler part and compresses the elastic spring.

[5] The locking device according to claim 1 or 2, further comprising: a coupler support flange partially or entirely formed on the coupler body of the coupler part and brought into contact with a surface of the concrete structure to reduce a load applied to the head part positioned in the coupler part and to prevent rotation of the coupler part.

[6] A locking device for moving a concrete structure, comprising a head part, a body part and a bed part, and configured to be embedded into the concrete structure to thereby directly apply external lifting force to the concrete structure, the head part having the shape of an Ω or a ring and being locked to a lifting hook of an external lifting apparatus, and the body part being made of a reinforced steel bar or being formed with a plurality of projections on an outer surface thereof.