KR-20260067617-A - DEVICE FOR LIFTING CONCRETE BLOCKS

KR20260067617AKR 20260067617 AKR20260067617 AKR 20260067617AKR-20260067617-A

Abstract

The present invention relates to a device for lifting concrete blocks. Specifically, the present invention relates to a device for easily lifting concrete blocks without manufacturing a lifting hook embedded inside the concrete block, by attaching a lifting device comprising a frame, an arm, a binding pin, etc., to the concrete block and lifting the concrete block through a hook or handle on the frame.

Inventors

박창범
김창훈
최윤호

Assignees

현대건설(주)

Dates

Publication Date: 20260513
Application Date: 20241106

Claims (20)

In a lifting device for lifting concrete blocks, A main frame configured to be located on top of the above concrete block; A pair of adjustable arms configured to fix one side and the other side of the concrete block from the main frame to the bottom of the concrete block; A spacing adjustment device capable of moving the adjustable arms along the main frame to adjust the spacing between the adjustable arms; A binding pin configured to bind the adjustable arms along the bottom of the concrete block parallel to the main frame; One or more lifting hooks or one or more lifting handles to which a hook or rope can be connected for lifting the lifting device attached to the concrete block, The above one or more lifting hooks or the above one or more lifting handles are located on the main frame; including, Lifting device.
In Article 1, The above adjustable arms can slide along the sliding rail of the main frame, and The above adjustable arms can rotate around the rotation axes on the main frame, and The above adjustable arms are adjustable in terms of the spacing between the adjustable arms and the angle of the adjustable arms according to the size or shape of the concrete block. Lifting device.
In Article 2, The above gap adjustment device includes a locking device capable of adjusting the sliding stop position so that the adjustable arms are fixed at a set position after sliding along the main frame, and The above sliding rail has teeth formed at regular intervals in the form of ratchet gears that move when the above adjustable arms slide, and The above locking device includes a pawl that is inserted between the teeth of the ratchet gear to prevent the adjustable arms from moving in the set position, and The above locking device is configured such that when the above pawl is pulled, the locking device is released and the above adjustable arms can slide again. Lifting device.
In Article 1, In order to absorb shock during lifting of the lifting device bound to the concrete block, the lifting device further includes a shock absorber disposed between the adjustable arms and the main frame, and The shock absorber comprises a rubber-metal sandwich shock absorber in the form of a multilayer rubber and metal sandwich, or springs of multiple stiffness, or a hydraulic damper, or a combination in which one or more of the rubber-metal sandwich shock absorber, the springs of multiple stiffness, and the hydraulic damper are arranged in parallel. Lifting device.
In Paragraph 4, The above rubber-metal sandwich shock absorber is configured such that alternating layers of a rubber layer for absorbing shock and a metal plate for reinforcing the main frame so as not to deform while the shock is dispersed through the rubber layer are formed. The above-mentioned multi-stiffness spring is configured such that multiple springs with different elastic moduli are arranged in parallel to provide soft cushioning during small impacts and exert strong resistance during large impacts to mitigate shocks. The above hydraulic damper includes a hydraulic oil channel and a damper piston, wherein the hydraulic oil channel is a path through which the hydraulic oil flows while the damper piston is operating, and the damper piston is configured to move up and down within the hydraulic damper according to the pressure applied to the hydraulic damper to regulate the flow of fluid so that the resistance varies according to the magnitude of the pressure. Lifting device.
In Paragraph 4, The shock absorber is positioned at the joint between the main frame and the adjustable arms in a structure capable of 360-degree rotation, configured to disperse shock from all directions to the joint. Lifting device.
In Article 1, The lifting device further includes a clamp for securing the concrete block to the end of each of the adjustable arms, The clamp includes a plurality of independent grip arms at the ends of the clamp, and The plurality of grip arms are configured to fix the concrete block by distributing pressure at multiple points in accordance with the shape of the concrete block. Lifting device.
In Article 1, The portions of the main frame and the adjustable arms that come into contact with the concrete block are configured in the form of protrusions to increase friction with the concrete block, and The above protrusions are composed of double protrusion lines, including a first protrusion line to absorb shock generated from contact with the concrete block and a second protrusion line to increase frictional force to strengthen the fixation of the concrete block. The first protrusion line above is composed of a rubber or silicone material, and The above second protrusion line is composed of a metal or hardened plastic material, Lifting device.
In a lifting device for lifting concrete blocks, A first main frame configured to be located on the top of the above concrete block; A pair of first adjustable arms configured to fix one side and the other side of the concrete block from the first main frame to the bottom of the concrete block; A first spacing adjustment device capable of moving the first adjustable arms along the first main frame to adjust the spacing between the first adjustable arms; A first binding pin configured to bind the first adjustable arms along the bottom of the concrete block parallel to the first main frame; One or more first lifting hooks or one or more first lifting handles to which a hook or rope of another device for lifting the above lifting device can be connected, The above one or more first lifting hooks or the above one or more first lifting handles are located on the above first main frame; A second main frame configured parallel to the first main frame; A pair of second adjustable arms configured to fix one side and the other side of the concrete block from the second main frame to the bottom of the concrete block; A second spacing adjustment device capable of moving the second adjustable arms along the second main frame to adjust the spacing between the second adjustable arms; A second binding pin configured to bind the second adjustable arms along the bottom of the concrete block parallel to the second main frame; One or more second lifting hooks or one or more second lifting handles to which a hook or rope can be connected for lifting the lifting device bound to the concrete block, The above one or more second lifting hooks or the above one or more second lifting handles are located on the above second main frame; A first auxiliary frame configured to connect one end of the first main frame and one end of the second main frame; A second auxiliary frame configured to connect the other end of the first main frame and the other end of the second main frame; including, Lifting device.
In Article 9, The first adjustable arms or the second adjustable arms can slide along the sliding rail of the first main frame or the second main frame, and The first adjustable arms or the second adjustable arms are rotatable about the axes of rotation on the first main frame or the second main frame, and The first adjustable arms or the second adjustable arms are adjustable in spacing between the first adjustable arms or the second adjustable arms and in angle between the first adjustable arms or the second adjustable arms according to the size or shape of the concrete block. Lifting device.
In Article 10, The first gap adjustment device or the second gap adjustment device includes a locking device capable of adjusting a sliding stop position so that the first adjustable arms or the second adjustable arms are fixed at a set position after sliding along the first main frame or the second main frame, and The above sliding rail has teeth formed at regular intervals in the form of ratchet gears that move when the above adjustable arms slide, and The locking device includes a pawl that is inserted between the teeth of the ratchet gear to prevent the first adjustable arms or the second adjustable arms from moving from the set position, and The above locking device is configured such that when the above pawl is pulled, the locking device is released and the first adjustable arms or the second adjustable arms can slide again. Lifting device.
In Article 9, In order to absorb shock during lifting of the lifting device bound to the concrete block, the lifting device further includes a shock absorbing device disposed between the first adjustable arms or the second adjustable arms and the first main frame or the second main frame, and The shock absorber comprises a rubber-metal sandwich shock absorber in the form of a multilayer rubber and metal sandwich, or springs of multiple stiffness, or a hydraulic damper, or a combination in which one or more of the rubber-metal sandwich shock absorber, the springs of multiple stiffness, and the hydraulic damper are arranged in parallel. Lifting device.
In Article 12, The rubber-metal sandwich shock absorber described above is configured such that a rubber layer for absorbing shock and a metal plate for reinforcing the first main frame or the second main frame so as not to deform while the shock is dispersed through the rubber layer are alternately layered. The above-mentioned multi-stiffness spring is configured such that multiple springs with different elastic moduli are arranged in parallel to provide soft cushioning during small impacts and exert strong resistance during large impacts to mitigate shocks. The above hydraulic damper includes a hydraulic oil channel and a damper piston, wherein the hydraulic oil channel is a path through which the hydraulic oil flows while the damper piston is operating, and the damper piston is configured to move up and down within the hydraulic damper according to the pressure applied to the hydraulic damper to regulate the flow of fluid so that the resistance varies according to the magnitude of the pressure. Lifting device.
In Article 12, The shock absorber is positioned in a structure capable of 360-degree rotation at the joint portion of the first main frame or the second main frame and the first adjustable arms or the second adjustable arms, configured to disperse shock from all directions to the joint portion. Lifting device.
In Article 9, The lifting device further includes a clamp for securing the concrete block to the end of each of the first adjustable arms or the second adjustable arms, The clamp includes a plurality of independent grip arms at the ends of the clamp, and The plurality of grip arms are configured to fix the concrete block by distributing pressure at multiple points in accordance with the shape of the concrete block. Lifting device.
In Article 9, The portion where the first main frame or the second main frame and the first adjustable arms or the second adjustable arms come into contact with the concrete block is configured in the form of a protrusion to increase frictional force with the concrete block, and The above protrusions are composed of double protrusion lines, including a first protrusion line to absorb shock generated from contact with the concrete block and a second protrusion line to increase frictional force to strengthen the fixation of the concrete block. The first protrusion line above is composed of a rubber or silicone material, and The above second protrusion line is composed of a metal or hardened plastic material, Lifting device.
In a lifting device for lifting concrete blocks, A first main frame configured to be located on the top of the above concrete block; A pair of first adjustable arms configured to fix one side and the other side of the concrete block from the first main frame to the bottom of the concrete block; A first spacing adjustment device capable of moving the first adjustable arms along the first main frame to adjust the spacing between the first adjustable arms; A first binding pin configured to bind the first adjustable arms along the bottom of the concrete block parallel to the first main frame; One or more first lifting hooks or one or more first lifting handles to which a hook or rope can be connected for lifting the lifting device bound to the concrete block, One or more first lifting hooks or one or more first lifting handles are located on one or more of the first main frame; A second main frame configured parallel to the first main frame; A pair of second adjustable arms configured to fix one side and the other side of the concrete block from the second main frame to the bottom of the concrete block; A second spacing adjustment device capable of moving the second adjustable arms along the second main frame to adjust the spacing between the second adjustable arms; A second binding pin configured to bind the second adjustable arms along the bottom of the concrete block parallel to the second main frame; One or more second lifting hooks or one or more second lifting handles to which a hook or rope can be connected for lifting the lifting device bound to the concrete block, The above one or more second lifting hooks or the above one or more second lifting handles are located on the above second main frame; A third main frame configured parallel to the first main frame and the second main frame; A pair of third adjustable arms configured to fix one side and the other side of the concrete block from the third main frame to the bottom of the concrete block; A third spacing adjustment device capable of moving the third adjustable arms along the third main frame to adjust the spacing between the third adjustable arms; A third binding pin configured to bind the third adjustable arms along the bottom of the concrete block parallel to the third main frame; One or more third lifting hooks or one or more third lifting handles to which a hook or rope can be connected for lifting the lifting device bound to the concrete block, The above one or more third lifting hooks or the above one or more third lifting handles are located on the above third main frame; A first auxiliary frame configured to connect one end of the first main frame, one end of the second main frame, and one end of the third main frame; A third auxiliary frame configured to connect the other end of the first main frame, the other end of the second main frame, and the other end of the third main frame; including, Lifting device.
In Article 17, The first adjustable arms, the second adjustable arms, or the third adjustable arms can slide along the sliding rail of the first main frame, the second main frame, or the third main frame, and The first adjustable arms, the second adjustable arms, or the third adjustable arms can rotate about the axes of rotation on the first main frame, the second main frame, or the third main frame. The first adjustable arms or the second adjustable arms or the third adjustable arms are adjustable in spacing between the first adjustable arms or the second adjustable arms or the third adjustable arms and in angles between the first adjustable arms or the second adjustable arms or the third adjustable arms, depending on the size or shape of the concrete block. Lifting device.
In Article 18, The first gap adjustment device or the second gap adjustment device or the third gap adjustment device includes a locking device capable of adjusting a sliding stop position so that the first adjustable arms or the second adjustable arms or the third adjustable arms are fixed at a set position after sliding along the first main frame or the second main frame or the third main frame. The above sliding rail has teeth formed at regular intervals in the form of ratchet gears that move when the above adjustable arms slide, and The locking device includes a pawl that is inserted between the teeth of the ratchet gear to prevent the first adjustable arms, the second adjustable arms, or the third adjustable arms from moving from the set position. The locking device is configured such that when the pawl is pulled, the locking device is released and the first adjustable arms, or the second adjustable arms, or the third adjustable arms can slide again. Lifting device.
In Article 17, In order to absorb shock during lifting of the lifting device bound to the concrete block, the lifting device further includes a shock absorbing device disposed between the first adjustable arms, the second adjustable arms, or the third adjustable arms and the first main frame, the second main frame, or the third main frame. The shock absorber comprises a rubber-metal sandwich shock absorber in the form of a multilayer rubber and metal sandwich, or springs of multiple stiffness, or a hydraulic damper, or a combination in which one or more of the rubber-metal sandwich shock absorber, the springs of multiple stiffness, and the hydraulic damper are arranged in parallel. Lifting device.

Description

Device for lifting concrete blocks The present invention relates to a device for lifting concrete blocks. Specifically, the present invention relates to a device for easily lifting concrete blocks without manufacturing a lifting hook embedded inside the concrete block, by attaching a lifting device comprising a frame, an arm, a binding pin, etc., to the concrete block and lifting the concrete block through a hook or handle on the frame. Traditionally, the widely used method for lifting concrete blocks involved embedding lifting hooks (such as wire ropes) inside the block and using them to lift the block. This method involves the inconvenience of having to install additional lifting wires or hooks during block manufacturing and allocate separate space within the block for this purpose. Furthermore, these lifting hooks are susceptible to corrosion or damage over time, resulting in long-term maintenance costs. Lifting hooks embedded in concrete blocks are susceptible to corrosion as they are exposed to the external environment over time. This problem is particularly pronounced during construction in marine environments or humid locations. Corroded lifting hooks pose a high risk of breakage during lifting operations, which can threaten worker safety. This safety issue has been pointed out as one of the major drawbacks of existing technology. In the method of purchasing lifting hooks, the hooks are often discarded after being used once during the lifting process. In other words, due to the structure that makes reuse impossible, components such as lifting hooks and wires are required anew every time, which becomes a major factor hindering economic efficiency. Since the number and size of lifting hooks must be designed differently depending on the size of the block, the cost of these components becomes a significant burden in large-scale projects. The lifting method using lifting hooks involves a complex construction process. When fabricating concrete blocks, a separate structure must be designed to embed the lifting hooks, and installing them accurately within the blocks requires significant time and manpower. Furthermore, additional work is required during the attachment and removal of the hooks, which prolongs the overall construction process and increases costs. In conventional lifting methods, there is a risk that the concrete blocks may be damaged if the lifting hooks installed on them are not properly secured inside the block or if the hooks corrode. Particularly for large blocks, if the hooks are not securely fastened, the block may fall or break during lifting. This issue can lead to serious safety problems in large-scale projects. Blocks with embedded lifting hooks are difficult to remove even after lifting. In particular, once installed, the hooks may remain inside the block, damaging the structure's appearance or leaving behind corroded hooks that impose an additional burden on maintenance. This problem is particularly severe in infrastructure structures heavily exposed to the external environment. Conventional lifting methods also present issues regarding construction efficiency. Lifting using lifting hooks significantly increases construction time and labor costs, and particularly in large-scale projects, the lifting process can have a major impact on the overall project schedule. Consequently, new technology is required to address these issues. To address these issues, a method is required where the lifting device itself can secure and lift the block from the outside. A device and method capable of stably lifting blocks without using lifting hooks are proposed as a solution that resolves the shortcomings of existing methods while significantly improving construction efficiency and economic feasibility. FIG. 1 illustrates an example of a lifting device in the form of a single-stage jig according to various embodiments of the present invention. FIG. 2 illustrates an example of a two-stage jig-type lifting device according to various embodiments of the present invention. FIG. 3 illustrates an example of a lifting device in the form of a single-stage jig according to various embodiments of the present invention. FIG. 4 illustrates an example of a two-stage jig-type lifting device according to various embodiments of the present invention. FIG. 5 illustrates an example of a three-stage jig-type lifting device according to various embodiments of the present invention. FIG. 6 illustrates an example of the structural safety of a lifting device in the form of a single-stage jig according to various embodiments of the present invention. FIG. 7 illustrates an example of the structural safety of a two-stage jig-type lifting device according to various embodiments of the present invention. FIG. 8 illustrates an example of the structural safety of a three-stage jig-type lifting device according to various embodiments of the present invention. Hereinafter, embodiments of the present invention are described in detai