Lifting unit and lifting method

Abstract

To provide a lifting unit capable of lifting building components while holding them in place. [Solution] The lifting unit 1 includes receiving members 10A and 10B that are spaced apart horizontally and support the steel frame member B from below, and connecting members 20A and 20B that are spaced apart horizontally, positioned outside the steel frame member, and connect the receiving members 10A and 10B. The receiving member 10 has a pair of receiving protrusions 15 that are provided at both ends of a long receiving body 11 and sandwich the steel frame member B from the side. The connecting member 20 has a pair of connecting extensions 25 that are provided at both ends of a long connecting body 21 and are connected to the receiving protrusions 15. The receiving protrusions 15 have hooking holes 17 for attaching a lifting sling S. The connecting extensions 25 have mounting holes 27 for attaching a winding belt V.

Description

Technical Field

[0004] , , ,

[0001] The present invention relates to a lifting unit and a lifting method, and particularly to a lifting unit and a lifting method for lifting a building member while holding it.

Background Art

[0002] Conventionally, a construction member such as a steel member is carried into a construction site, and the carried-in construction member is lifted by a lifting member (sling) hooked to a lifting device, and the lifted construction member is installed at a predetermined position in a building (see, for example, Patent Documents 1 and 2). In Patent Document 1, a pair of lifting jigs (receiving members) provided at intervals in the horizontal direction and supporting a building member from below are used to lift the building member. Specifically, one end of each of four wire ropes (lifting members) hooked to a crane is hooked to a lifting jig to lift a building member. Patent Document 2 has a similar configuration.

Prior Art Documents

Patent Documents

[0003] <000002​​​​​​​​​​​​​​​​​​Therefore, there was a need for a lifting unit that could suitably lift various building components, including steel frame members, while holding them in place. In particular, there was a need for a lifting unit that could suitably lift building materials even when they were stacked side by side and multiple building materials were stacked with gaps between them in the vertical direction.

[0005] The object of the present invention is to provide a lifting unit and a lifting method that can suitably lift building components while holding them in place. Another object of the present invention is to provide a lifting unit and lifting method that can suitably lift building components even when they are stacked side by side and with gaps between them in the vertical direction. [Means for solving the problem]

[0006] The aforementioned problem is solved by the lifting unit of the present invention, which is a lifting unit for lifting a building member while holding it, comprising: a first support member and a second support member provided at a distance from each other in one horizontal direction, extending horizontally in an elongated manner to support the building member from below; and a first connecting member and a second connecting member provided at a distance from each other in another direction intersecting the aforementioned horizontal direction, extending horizontally in an elongated manner, positioned outside the building member, and connecting the first support member and the second support member, wherein the support member comprises an elongated support body that supports the building member from below, and both ends in the longitudinal direction of the support body The problem is solved by having a pair of receiving protrusions provided on the receiving body, which protrude upward from the receiving body and are arranged to sandwich the building member from the side, and the connecting member having a long connecting body and a pair of connecting extensions provided at both ends in the longitudinal direction of the connecting body, which extend beyond the connecting body and are connected to the receiving protrusions, and a hooking portion formed on either the receiving protrusions or the connecting extensions for hanging a long suspension member, and a mounting portion formed on the other of the receiving protrusions or the connecting extensions for attaching a long wrapping member for wrapping the building member.

[0007] With the above configuration, a lifting unit can be realized that is simple in design and capable of effectively lifting building components while holding them in place. More specifically, the above-mentioned lifting unit includes a first connecting member and a second connecting member that connect the first and second support members, which support the building components. This prevents the position (sling position) of the first and second support members, which support the building components from below, from shifting, and allows the building components to be lifted stably. Furthermore, in the above-described lifting unit, a fastening portion for attaching a lifting member (lifting sling) is formed on either the receiving projection or the connecting extension, and a mounting portion for attaching a wrapping member (wrapping belt) is formed on the other of the receiving projection or the connecting extension. This allows for the construction members to be suitably lifted by the lifting member (by the lifting member fastened to the lifting device) while multiple construction members are secured with the wrapping member. They can also be lowered.

[0008] In this case, the lifting unit is used to lift multiple steel frame members while holding them at intervals in the vertical direction, the fastening portion is a fastening hole for fastening a lifting sling which will be the lifting member, and is provided at the upper end of the receiving projection, and the mounting portion is a mounting hole for attaching a winding belt which will be the winding member, and is provided at the extended end of the connecting extension. With the above configuration, a lifting unit can be realized that can suitably lift building materials even when they are stacked with gaps in the vertical direction. In particular, by arranging a hooking hole at the upper end of the receiving projection and a mounting hole at the extended end of the connecting extension, the lifting member and the wrapping belt can be securely hooked to the four corners of the lifting unit.

[0009] In this case, the receiving projection has a connecting shaft provided on the outer surface of the receiving projection and projecting toward the connecting extension, the connecting extension has a connecting hole provided on the side surface of the connecting extension and detachably connecting to the connecting shaft in the direction of projection of the connecting shaft, and the latching portion and the mounting portion are preferably positioned above or to the outside of the connecting shaft and the connecting hole, respectively. With the above configuration, the connecting member can be easily connected to the receiving member. Furthermore, the connecting member can be easily removed from the receiving member.

[0010] In this case, the connecting member is detachably connected to the receiving member such that the end face of the connecting body faces the side surface of the extended end of the receiving body, and the inner surface of the connecting extension faces the outer surface of the receiving projection, and the lifting unit is preferably formed in a frame shape by the first receiving member, the second receiving member, the first connecting member, and the second connecting member. With the above configuration, the first receiving member, the second receiving member, the first connecting member, and the second connecting member can be firmly connected. In particular, by assembling these parts into a frame shape, a stable lifting unit can be realized.

[0011] In this case, a positioning projection is formed at the end of the receiving body, protruding upward from the upper surface of the receiving body to position the building member, and the positioning projection is positioned spaced apart from the end of the receiving body, and the suspension member fits into the gap formed between the end of the receiving body and the positioning projection in the longitudinal direction of the receiving body. With the above configuration, building components can be easily positioned on the upper surface of the receiving member. In addition, building components can be loaded while ensuring a gap for attaching the suspension member (suspension sling).

[0012] In this case, the lifting unit is used to lift a steel frame member having a column and a brace connected to the column at a predetermined angle of inclination, the receiving member supports the left and right steel frame members that are adjacent to each other horizontally from below, the connecting member is arranged to surround the left and right steel frame members in a top view, and a positional displacement suppression part is provided on the upper surface of the receiving body at a position corresponding to the brace to suppress the displacement of the brace. With the above configuration, when loading steel frame members having columns and braces, the displacement suppression section can suppress the displacement of the braces. Furthermore, even when steel frame members are loaded side by side, it is possible to suppress the sliding of the steel frame members and the shifting of the center of gravity of the steel frame members.

[0013] Furthermore, the aforementioned problems are solved by the lifting method of the present invention, which is a lifting method using the lifting unit described above, comprising: an arrangement step of arranging the first receiving member and the second receiving member at a predetermined interval; a connection step of connecting the first receiving member and the second receiving member with the first connecting member and the second connecting member; a loading step of stacking the building members on the first receiving member and the second receiving member side by side; a hooking step of hooking the lifting member onto the hooking portion of the receiving member; and an attachment step of attaching the wrapping member to the attachment portion of the connecting member, wherein in the connection step, the first receiving member, the second receiving member, the first connecting member and the second connecting member are connected in a frame-like manner. With the above configuration, a lifting method can be realized that allows for the appropriate lifting of building components while holding them in place.

[0014] In this case, during the loading process, steel frame members having columns and braces connected to the columns at a predetermined angle of inclination are loaded side by side as building components, and the steel frame members are loaded with gaps between them in the vertical direction, with wooden supports interposed between the steel frame members in the vertical direction, and the wooden supports are positioned so as to overlap the receiving members when viewed from above. With the above configuration, even when steel frame members are stacked side by side and stacked with a space in the vertical direction, a lifting method capable of suitably lifting the steel frame members can be realized.

Advantages of the Invention

[0015] According to the lifting unit and the lifting method of the present invention, it becomes possible to suitably lift a building member while holding it. Moreover, even when building members are stacked side by side and stacked with a space in the vertical direction, the building members can be suitably lifted.

Brief Description of the Drawings

[0016] [Figure 1] It is a diagram showing a state where a steel frame member is being lifted using a lifting unit. [Figure 2] It is a plan view of a steel frame member. [Figure 3] It is a perspective view of a pair of receiving members. [Figure 4] It is an exploded perspective view of a pair of receiving members and connecting members. [Figure 5] It is a perspective view of a pair of receiving members, connecting members, a steel frame member, and a pair of crossbeams. [Figure 6] It is a side view of a lifting unit loaded with a steel frame member. [Figure 7] It is a plan view of a lifting unit loaded with a steel frame member.

Embodiments for Carrying Out the Invention

[0017] Hereinafter, embodiments according to the present invention will be described with reference to FIGS. 1 to 7. This embodiment relates to a "lifting unit" that enables a building member (steel frame member) to be suitably lifted while being held. It also relates to a "lifting method" using the lifting unit.

[0018] <Overall Configuration> As shown in Figure 1, the lifting unit 1 is used to transport multiple steel frame members B to the construction site, and at the construction site, it is lifted together with the steel frame members B by the lifting device L and used when unloading the steel frame members B. Specifically, the lifting unit 1 is transported by truck from the factory to the construction site with the steel frame members B stacked flat. At the construction site, it is lifted together with the steel frame members B by a lifting sling S attached to the lifting device L, and used to install the steel frame members B in the designated position within the building.

[0019] The lifting unit 1 is lifted together with the steel frame member B while being supported by two lifting slings S that are attached to the lifting device L. In this configuration, multiple steel frame members B are stacked side by side and also stacked vertically with gaps between them. The multiple steel frame members B are held by the lifting unit 1 (receiving member 10, connecting member 20, and support beam 30) and stacked while wrapped around (secured by) two wrapping belts V. As a result, the lifting unit 1, despite its simple configuration, suppresses slippage of the steel frame member B and shifting of its center of gravity, enabling stable lifting and unloading of the steel frame member B.

[0020] As shown in Figure 1, the lifting sling S is, for example, a long sling made of nylon, with one end hooked onto the lifting section L1 of the lifting device L, and the other end hooked onto the four corners (sling hooking holes 17) of the lifting unit 1. An annular portion S1 is formed at the other end of the suspension sling S in the longitudinal direction. The annular portion S1 is directly attached to the sling attachment hole 17, but is not limited to that and may also be attached via a known shackle.

[0021] As shown in Figure 1, the wrapping belt V is, for example, a long belt made of nylon (a cargo securing belt), which is attached to both ends of the lifting unit 1 in the longitudinal direction and wrapped around multiple steel frame members B. Specifically, the wrapping belt V is wrapped around multiple steel frame members B to secure them together, and is attached to the belt attachment hole 27 of the lifting unit 1 to fasten the load. The wrapping belt V shown in Figure 1 is attached in a frame-like manner to surround the steel frame member B (it goes all the way around), but this is not particularly limited, and it may also be attached in a way that presses down on the steel frame member B from above (it may go only halfway around). In other words, the wrapping belt V does not need to go all the way to the underside of the steel frame member B.

[0022] As shown in Figures 1 and 2, steel member B is a steel material used in steel-framed buildings, and is a structural member used in the framework, such as columns and beams. Specifically, steel member B is a member composed of column B1 (steel column), brace B2 (steel brace) connected to column B1 at a predetermined angle of inclination, and a second column B3 connected to brace B2. Steel members B include, for example, (1) an "N-type steel member" consisting of column B1, brace B2, and second column B3, (2) a "V-type steel member" consisting of column B1 and brace B2, and (3) an "I-type steel member" consisting of column B1. Furthermore, the upper and lower ends of column B1 (second column B3) are connected to connecting parts (also called connecting joints or joint boxes (registered trademark)), and the type (category) differs depending on the type of connecting part.

[0023] The steel frame member B shown in Figures 1 and 2 is an "N-type steel frame member" and is composed of a column B1, a brace B2, and a second column B3. Column B1 comprises a long column body B1a formed from a square pipe, a foundation connection part B1b fixed to the lower end of the column body B1a by welding, and a beam connection part B1c fixed to the upper end of the column body B1a by welding. The foundation connection part B1b is the part that connects to the foundation of the building, and a connection hole is formed in the end face of the foundation connection part B1b. The beam connection section B1c is the part that connects to the building's beam, and a connection hole is formed on the end face of the beam connection section B1c. Brace B2 is connected to the lower end of column B1.

[0024] Brace B2 is a reinforcing member that is connected to column B1 at a predetermined angle of inclination and extends diagonally relative to column B1. Column B1 and brace B2 together form the structural frame of a load-bearing wall. Brace B2 comprises a long brace body B2a formed from a square pipe, a damper B2b fixed to the lower end of the brace body B2a by welding, and a column connection part B2c fixed to the upper end of the brace body B2a by welding. Damper B2b is a component that absorbs vibrations (vibrational energy) caused by earthquakes, typhoons, etc., and is connected to the side of column B1. The column connection part B2c is the part that connects to the upper end of the second column B3 and is fixed to the side of the second column B3.

[0025] The second column B3, like column B1, has a long column body B3a, a foundation connection section B3b, and a beam connection section B3c. A connection hole is formed on the end face of the foundation connection section B3b. Similarly, a connection hole is formed on the end face of the beam connection section B3c.

[0026] In the case of a "V-shaped steel frame member," the steel frame member B consists of a column B1 and a brace B2 connected to the column B1. In this case, a brace connector will be fixed to one end of brace B2, for example, to connect to another brace.

[0027] As shown in Figures 1, 6, and 7, the steel frame members B are stacked horizontally adjacent to each other on the lifting unit 1, and multiple members are stacked vertically with gaps between them, using the link wood 30 as an intermediary. In this embodiment, all loads are "N-type steel frame members," but this is not particularly limited. For example, "N-type steel frame members" and "V-type steel frame members" may be loaded in combination, or "N-type steel frame members" and "I-type steel frame members" may be loaded in combination. Alternatively, "V-type steel frame members" may be loaded in combination with each other, or "V-type steel frame members" and "I-type steel frame members" may be loaded in combination.

[0028] <Lifting Unit> As shown in Figures 1 to 7, the lifting unit 1 is used to lift multiple steel frame members B while holding them at intervals in the vertical direction. The lifting unit 1 includes support members 10A and 10B that are spaced apart in the longitudinal direction of the steel frame member B and support the steel frame member B from below, connecting members 20A and 20B that are spaced apart in the width direction of the steel frame member B and are positioned outside the steel frame member B and connect the support members 10A and 10B, and linking members 30A and 30B that are spaced apart in the vertical direction and interposed between the steel frame members B.

[0029] As shown in Figures 1, 3 to 5, the receiving member 10 has a long receiving body 11 that supports the steel frame member B from below, and a pair of receiving protrusions 15 provided at both ends in the longitudinal direction of the receiving body 11, which protrude above the receiving body 11 and are positioned to sandwich the steel frame member B from the sides. In this embodiment, two support members, the first support member 10A and the second support member 10B, support the steel frame member B from below. However, this is not limited to this embodiment, and three or more support members 10 may support the steel frame member B from below.

[0030] The receiving body 11 is a long member formed from, for example, a square pipe, and has a length that allows it to load two steel frame members B placed adjacent to each other on the left and right. At both ends of the receiving body 11, positioning protrusions 12 are formed that slightly protrude upward from the upper surface of the receiving body 11 and are capable of positioning the steel frame member B. The positioning projection 12 is positioned slightly away from the end of the receiving body 11 (for example, about 20 mm). The lifting sling S (annular portion S1) will fit into the gap formed between the end of the receiving body 11 and the positioning projection 12 along the length of the receiving body 11. This allows multiple steel frame members B to be loaded while maintaining a gap (space) for attaching the suspension sling S.

[0031] The receiving projection 15 is a plate-shaped member that is fixed to the end face of the receiving body 11 by welding and protrudes upward from the receiving body 11. The receiving projection 15 is provided on the lower part of its outer surface and has a connecting shaft 16 (connecting part) that protrudes outward from the receiving projection 15, and a sling attachment hole 17 (attachment part) provided above the connecting shaft 16 for attaching the suspension sling S.

[0032] The connecting shaft 16 is a bolt shaft that is detachably connected to the connecting hole 26 of the connecting member 20, and protrudes outward from the outer surface of the receiving projection 15. Specifically, a T-nut is welded to the side of the plate-shaped receiving projection 15 so as to be embedded, and a bolt shaft is assembled to the T-nut to form the connecting shaft 16. The sling attachment hole 17 is a through hole formed by penetrating the upper end of the receiving projection 15, and is positioned above the receiving body 11. Furthermore, the sling attachment hole 17 is positioned above the connecting member 20.

[0033] As shown in Figures 1, 4, and 5, the connecting member 20 is a connecting member (reinforcement member) that connects the receiving members 10A and 10B, and has a long connecting body 21 and a pair of connecting extensions 25 provided at both ends in the longitudinal direction of the connecting body 21, extending beyond the connecting body 21 and connected to the receiving projection 15. In this embodiment, the connecting members 20A and 20B are attached so as to sandwich the receiving members 10A and 10B and the steel frame member B from the sides. However, they may also be attached so as to be connected to the bottom surface of the receiving members 10A and 10B and to support the receiving members 10A and 10B and the steel frame member B from below.

[0034] The connecting body 21 is a long member formed from, for example, a square pipe, and is positioned to be sandwiched between the first receiving member 10A and the second receiving member 10B. Alternatively, the steel frame member B may be in contact with the upper surface (or a portion of the upper surface) of the connecting body 21, and the steel frame member B may be supported from below by the connecting body 21.

[0035] The connecting extension 25 is a plate-shaped member that is fixed by welding to the outer surfaces of both ends of the connecting body 21 and extends outward from the connecting body 21 (outward in the longitudinal direction of the connecting body 21). The connecting extension 25 has a connecting hole 26 provided in the portion that extends outward from the connecting body 21, and a belt attachment hole 27 (attachment portion) provided outside the connecting hole for attaching the wrapping belt V.

[0036] The connecting hole 26 is a through hole formed by penetrating the side surface of the connecting extension 25, and is a connecting portion that is detachably connected to the connecting shaft 16 in the direction of the connecting shaft 16's projection. The belt attachment hole 27 is a through hole formed by penetrating the extended end of the connecting extension 25, and is positioned outside the connecting body 21. Furthermore, the belt attachment holes 27 are positioned outside the receiving member 10 in the longitudinal direction of the connecting member 20.

[0037] Furthermore, in order to increase the fixing strength between the connecting body 21 and the connecting extension 25, a reinforcing part (reinforcing angle), such as an L-shaped angle, may be provided to connect the end face of the connecting body 21 and the inner surface of the connecting extension 25. If such a reinforcing angle is provided, the reinforcing angle will come into contact with the inner surface in the width direction of the receiving body 11 and the outer surface of the receiving projection 15.

[0038] As shown in Figures 1 and 5, the lintel 30 is a long, rectangular prism-shaped piece of timber, which is used as a sleeper when stacking steel frame members B with gaps in the vertical direction. The wooden supports 30A and 30B are arranged at intervals along the length of the steel frame member B, similar to the receiving members 10A and 10B. More specifically, the wooden supports 30A and 30B are positioned so as to overlap the receiving members 10A and 10B when viewed from above. This allows the lifting unit 1 to stably hold the steel frame member B and lift it effectively.

[0039] In the above configuration, as shown in Figures 1, 3 to 5, the sling attachment hole 17 is positioned to protrude above the connecting shaft 16 and the connecting hole 26, and the belt attachment hole 27 is positioned to protrude outward (outward in the longitudinal direction of the connecting member 20) from the connecting shaft 16 and the connecting hole 26. This allows the suspension sling S to be easily attached to the receiving member 10, and the wrapping belt V to be easily attached to the connecting member 20.

[0040] In the above configuration, as shown in Figures 1, 4, and 5, when the connecting members 20A and 20B are connected to the receiving members 10A and 10B, the end face of the connecting body 21 abuts against the side surface of the extended end of the receiving body 11, and the inner surface of the connecting extension 25 abuts against the outer surface of the receiving projection 15. The first receiving member 10A, the second receiving member 10B, the first connecting member 20A, and the second connecting member 20B form a frame shape. This allows for a strong connection between the receiving members 10A and 10B and the connecting members 20A and 20B. In particular, the assembly of these parts into a frame-like structure enables the realization of a stable lifting unit 1.

[0041] <Loading of steel frame members> Next, the state when multiple steel frame members B are loaded onto the lifting unit 1 will be explained based on Figures 6 and 7. Figure 6 is a side view of the lifting unit 1 loaded with steel frame member B. Figure 7 is a top view of the lifting unit 1 loaded with steel frame member B.

[0042] The lifting unit 1 can stack two steel frame members B side by side, and can also stack multiple steel frame members B with spacing between them in the vertical direction. Specifically, the lifting unit 1 is equipped with two receiving members 10, two connecting members 20, and eight linking members 30, and can carry a total of ten steel frame members B by stacking two steel frame members B on each side in five layers. According to Figure 6, the lower lifting unit 1 is equipped with two receiving members 10, two connecting members 20, and eight support beams 30, and is capable of carrying a total of ten steel frame members B. The upper lifting unit 1 is equipped with two receiving members 10, two connecting members 20, and six support beams 30, and is capable of carrying a total of eight steel frame members B. Furthermore, building materials such as steel frame members B, columns, beams, and ladders may be stacked on top of the upper surface of the lifting unit 1 located in the upper section, by placing additional wooden blocks 30A and 30B on top of the upper section.

[0043] As shown in Figure 7, the support members 10A and 10B support the left and right steel frame members B, which are adjacent to each other horizontally, from below. The connecting members 20A and 20B (connecting extensions 25) are arranged to surround the left and right steel frame members in a top view. When the steel frame member B is placed on the upper surface of the pair of receiving members 10, a receiving recess 13 capable of accommodating the column B1 is formed in the portion of the upper surface of the receiving body 11 corresponding to the column B1. In addition, a displacement suppression portion 14 is provided in the portion of the upper surface of the receiving body 11 corresponding to the brace B2 to suppress displacement of the brace B2.

[0044] The column B1 fits into the receiving recess 13, allowing the steel frame member B to be held stably. Furthermore, as shown in Figure 7, it is preferable that a portion of the damper B2b of the steel frame member B fits into the receiving recess 13. This allows for even more stable holding of the steel frame member B. The receiving recess 13 may be formed by recessing the target portion on the upper surface of the receiving body 11, or it may be formed by attaching plywood or rubber to a portion of the upper surface of the receiving body 11 that is different from the target portion, thereby creating a step.

[0045] The displacement suppression portion 14 may be formed, for example, by applying an anti-slip material (displacement suppression material) to the upper surface of the receiving body 11. Alternatively, it may be formed by attaching rubber to the upper surface of the receiving body 11. When rubber is attached, a step is created on the upper surface of the receiving body 11, so the part without rubber becomes the receiving recess 13, and the part with rubber becomes the displacement suppression portion 14. By providing the displacement suppression section 14, displacement of the brace B2 can be suppressed. In particular, since the V-shaped steel member B has an unstable shape, the displacement of the brace B2 can be suppressed, allowing the steel member B to be loaded stably. In other words, it is possible to prevent steel member B from sliding or from tipping over due to a shift in its center of gravity.

[0046] <Lifting method> Next, the lifting method using the lifting unit 1 will be explained based on Figures 1 to 7. The method includes at least the following steps: "arrangement step," "connection step," "loading step," "fastening step," "installation step," and "lifting step." A detailed explanation follows. Regarding the construction of the building, explanations of construction processes other than those mentioned above will be omitted.

[0047] First, the worker performs a "placement process" in which the first support member 10A and the second support member 10B are placed at a predetermined interval (Step 1 (S1)). Specifically, as shown in Figures 3, 6, and 7, the worker positions the first support member 10A and the second support member 10B at positions corresponding to the length of the steel frame member B to be lifted.

[0048] Then, the worker performs a "connecting process" in which the first receiving member 10A and the second receiving member 10B are connected by the first connecting member 20A and the second connecting member 20B (Step 2). Specifically, as shown in Figures 4, 6, and 7, the worker connects the first receiving member 10A, the second receiving member 10B, the first connecting member 20A, and the second connecting member 20B in a frame-like structure.

[0049] Then, the worker performs the "loading process" (step 3) in which the two steel frame members B are placed side by side on the receiving members 10A and 10B. Specifically, as shown in Figures 5 to 7, the worker stacks the steel frame members B, which have columns B1 and braces B2, side by side, and also stacks the steel frame members B with gaps between them in the vertical direction. More specifically, the worker interposes the wooden supports 30A and 30B between the steel frame members B in the vertical direction, and positions the wooden supports 30A and 30B so that they overlap with the receiving members 10A and 10B when viewed from above. As shown in Figure 6, two sets of the lifting unit 1 (receiving member 10, connecting member 20, and link timber 30) may be stacked on top of each other. Alternatively, three or more sets (multiple sets) may be stacked.

[0050] Then, the worker performs the "hooking process" (step 4) in which the lifting sling S is hooked into the sling hooking holes 17 of the receiving members 10A and 10B. Specifically, as shown in Figure 1, the worker attaches the lifting sling S, which is attached to the lifting device L (lifting section L1), to the sling attachment holes 17 located at the four corners of the lifting unit 1.

[0051] Then, the worker performs the "installation process" (step 5) in which the wrap-around belt V is attached to the belt attachment holes 27 of the connecting members 20A and 20B. Specifically, as shown in Figure 1, the worker attaches the wrapping belt V using the belt attachment holes 27 located at the four corners of the lifting unit 1. The wrapping belt V is passed through two belt attachment holes 27, which are spaced apart in the width direction of the lifting unit 1, and is wrapped around the steel frame member B.

[0052] Then, the worker lifts the lifting unit 1 loaded with multiple steel frame members B and performs the "lifting process" (step 6), which involves lowering the steel frame members B to a designated location inside the building. After completing step 6 above, the series of work processes is finished.

[0053] With the above construction method, even if the steel frame members B are stacked side by side and spaced apart vertically, the steel frame members B can be lifted effectively.

[0054] <Other> In the above embodiment, as shown in Figure 1, the lifting unit 1 comprises two receiving members 10, two connecting members 20, and six linking members 30. However, the number of parts for each component is not particularly limited and can be changed. For example, to increase the rigidity of the lifting unit 1 and to load the steel frame member B appropriately, the number of support members 10 and support beams 30 may be increased. Alternatively, you could stack three (or four) steel members B in a horizontal line, or if the building material is relatively large, you could stack just one (or one) and then stack multiple others vertically with gaps in between.

[0055] In the above embodiment, as shown in Figures 1 and 5, a sling attachment hole 17 (attachment part) is formed in the receiving member 10 and a belt attachment hole 27 (attachment part) is formed in the connecting member 20, but this is not particularly limited and can be changed. For example, a belt attachment hole 27 may be formed in the receiving member 10, and a sling attachment hole 17 may be formed in the connecting member 20. Alternatively, both the sling attachment hole 17 and the belt attachment hole 27 may be formed in the receiving member 10, or both may be formed in the connecting member 20.

[0056] In the above embodiment, as shown in Figure 4, the receiving member 10 (receiving projection 15) has a rod-shaped connecting shaft 16 and the connecting member 20 (connecting extension 25) has a connecting hole 26, but the configuration is not particularly limited and the opposite configuration may also be used. In other words, the receiving member 10 may have a connecting hole, the connecting member 20 may have a connecting shaft, and the connecting hole and the connecting shaft may be detachably connected.

[0057] In the above embodiments, the lifting unit and lifting method according to the present invention were mainly described. However, the embodiments described above are merely examples to facilitate understanding of the present invention and do not limit it. The present invention can be modified and improved without departing from its spirit, and of course, equivalents thereof are included. In particular, the embodiments described above are merely examples and do not limit the present invention. [Explanation of Symbols]

[0058] L Lifting device (crane) L1 Lifting section S Lifting sling (lifting component) S1 Circular section V-shaped wrapping belt (wrapping component) B. Steel structural members (building components) B1 pillar B1a Column Body B1b Foundation connection section B1c Beam connection section B2 Brace B2a Brace Body B2b damper B2c Column connection section B3 Second Pillar B3a Column Body B3b Foundation connection section B3c Beam connection section 1. Lifting Unit 10 Receiving member 10A First support member 10B Second receiving member 11 Receiving body 12 Positioning protrusion (positioning part) 13 Receiving recess 14. Positional displacement suppression unit 15 Receiving protrusion 16 Connecting shaft 17. Sling attachment hole (attachment hole, attachment part) 20 Connecting Members 20A First connecting member 20B Second connecting member 21 Connecting Body 25 Connecting extension 26 connecting holes 27 Belt mounting holes (mounting holes, mounting parts) 30 Phosphorus 30A First Phosphorus Tree 30B Second Lin Tree

Claims

1. A lifting unit for lifting building components while holding them in place, A first support member and a second support member are provided at intervals in one horizontal direction, extending horizontally in an elongated manner, and supporting the building member from below. It comprises a first connecting member and a second connecting member that are spaced apart in a direction intersecting the aforementioned horizontal direction, extend horizontally in an elongated manner, are positioned outside the building member, and connect the first receiving member and the second receiving member, The receiving member is, A long support body that supports the aforementioned building component from below, It has a pair of receiving protrusions provided at both ends in the longitudinal direction of the receiving body, which protrude above the receiving body and are arranged to sandwich the building member from the side, The aforementioned connecting member is A long connecting body, It has a pair of connecting extensions provided at both ends in the longitudinal direction of the connecting body, extending beyond the connecting body and connected to the receiving projection, A fastening portion for attaching a long suspension member is formed in either the receiving projection or the connecting extension. A lifting unit characterized in that a mounting portion is formed on either the receiving projection or the connecting extension for attaching a long wrapping member around which the building material is wrapped.

2. The aforementioned lifting unit is used to lift multiple steel frame members while holding them at intervals in the vertical direction. The aforementioned fastening portion is a fastening hole for fastening the suspension sling which will be the suspension member, and is provided at the upper end of the receiving projection. The lifting unit according to claim 1, characterized in that the mounting portion is a mounting hole for attaching the winding belt which will be the winding member, and is provided at the extended end of the connecting extension portion.

3. The receiving projection is provided on the outer surface of the receiving projection and has a connecting shaft that protrudes from the receiving projection toward the connecting extension. The connecting extension portion has a connecting hole provided on the side surface of the connecting extension portion, which is detachably connected to the connecting shaft in the direction of the protrusion of the connecting shaft. The lifting unit according to claim 1 or 2, characterized in that the latching portion and the mounting portion are each positioned above or outside the connecting shaft and the connecting hole, respectively.

4. The connecting member is detachably connected to the receiving member such that the end face of the connecting body faces the side surface of the extended end of the receiving body, and the inner surface of the connecting extension faces the outer surface of the receiving projection. The lifting unit according to claim 1 or 2, characterized in that the lifting unit is formed in a frame shape by the first receiving member, the second receiving member, the first connecting member, and the second connecting member.

5. The end of the receiving body has a positioning projection that protrudes upward from the upper surface of the receiving body and positions the building component. The positioning projection is positioned at a distance from the end of the receiving body. The lifting unit according to claim 1 or 2, characterized in that the lifting member is housed in a gap formed between the end of the receiving body and the positioning projection in the longitudinal direction of the receiving body.

6. The aforementioned lifting unit is used to lift a steel frame member while holding a column and a brace connected to the column at a predetermined angle of inclination. The support member supports the left and right steel frame members, which are adjacent to each other in the horizontal direction, from below. The connecting member is arranged so as to surround the left and right steel frame members when viewed from above. The lifting unit according to claim 1 or 2, characterized in that a positional displacement suppression part is provided on the upper surface of the receiving body at a position corresponding to the brace to suppress displacement of the brace.

7. A lifting method using the lifting unit described in claim 1, Arrangement step of arranging the first receiving member and the second receiving member with a predetermined interval between them, A connecting step of connecting the first receiving member and the second receiving member with the first connecting member and the second connecting member, A loading step of stacking the building components side by side on the first support member and the second support member, A hooking step of hooking the suspension member onto the hooking portion of the receiving member, The process includes attaching the winding member to the attachment portion of the connecting member, A lifting method characterized in that, in the connection step, the first receiving member, the second receiving member, the first connecting member, and the second connecting member are connected in a frame-like manner.

8. In the aforementioned loading process, As building components, steel frame members having columns and braces connected to the columns at a predetermined angle of inclination are stacked side by side, and the steel frame members are stacked with gaps between them in the vertical direction. The lifting method according to claim 7, characterized in that a wooden link is interposed between the steel frame members in the vertical direction, and the wooden link is positioned so as to overlap the receiving member when viewed from above.

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