How to lift architectural panels

Abstract

To provide a lifting method of a construction panel which can easily and surely perform lifting work while satisfactorily maintaining designability of a construction panel.SOLUTION: In a lifting method of a construction panel for fixing a hanger 1 onto an upper surface of a construction panel 100, and then mounting and lifting a string-like member 30 on the hanger 1, the construction panel 100 is composed of an orthogonal laminated plate, and fixes the hanger 1 to the orthogonal laminated plate 100 by screwing into three or more layers of the orthogonal laminated plate 100 from the upper face side with a length not to penetrate through the orthogonal laminated plate 100.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a method for lifting a building panel. [Background technology]

[0002] As a method for lifting architectural panels such as floor panels, Patent Document 1 discloses a method in which multiple floor panels are attached and detached on a sling, and when a cross member is erected on the multiple floor panels, the sling is engaged with rings provided on both ends of the cross member, and the multiple floor panels are lifted up by the sling. With this lifting method, multiple floor panels can be lifted and lowered onto beams in a side-by-side state, which is said to eliminate the need for arranging the floor panels after lowering them.

[0003] However, this method of lifting floor panels using cross members had the risk of the floor panel dropping during lifting because the cross members were not fixed to the floor panel. Also, when lowering the lifted floor panel so that it was adjacent to the existing floor panel on the beam, the rings of the cross members protruding to the side of the floor panel interfered with the existing floor panel, making it difficult to position the floor panel without any gaps.

[0004] A conventional method for lifting architectural panels is known which uses a lifting device that is fixed using a through hole formed in the panel (for example, Patent Document 2). In this case, the problem of the protruding parts of the cross members interfering with the floor panel as described above does not occur. However, if the floor panel is exposed to the inside of the room due to an exposed ceiling or the like, there is a risk that the through hole in the floor panel will detract from the design of the room. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 11-241508 [Patent Document 1] Japanese Patent Application Publication No. 5-116881 Summary of the Invention [Problem to be solved by the invention]

[0006] SUMMARY OF THE PRESENT DISCLOSURE OF THE PRESENT DISCLOSURE An object of the present invention is to provide a method for lifting an architectural panel, which can perform the lifting operation easily and reliably while maintaining the design quality of the architectural panel. [Means for solving the problem]

[0007] The object of the present invention is to provide a method for lifting an architectural panel, comprising: fixing a hoisting tool to an upper surface of the architectural panel; attaching a string-like member to the hoisting tool; and lifting the architectural panel. The architectural panel is made of orthogonal laminated boards. the hanging device comprises a disk-shaped base plate and a mounting member supported by the base plate and to which the string-like member is attached, the base plate has a cross-shaped rib on an upper surface side, and each partition defined by the rib has a through hole through which a screw is inserted; A length that does not penetrate the cross-laminated board is provided for three or more layers from the upper surface side of the cross-laminated board. The above This is achieved by a method for lifting architectural panels in which the lifting tool is fixed to the cross-laminated board by screwing in a screw.

[0008] How to lift this architectural panel is before It is preferable that the hangers are disposed at the four corners of a rectangular area defined on the upper surface of the building panel, and that the hangers are fixed so that a portion of the rib is aligned along a diagonal line of the rectangular area.

[0009] The architectural panel is preferably a floor panel whose underside becomes an exposed ceiling surface. Effect of the Invention

[0010] According to the present invention, it is possible to provide a method for lifting an architectural panel, which can perform the lifting operation easily and reliably while maintaining the design quality of the architectural panel well. [Brief description of the drawings]

[0011] [Figure 1] 1 is a plan view of a lifting tool used in a method for lifting a construction panel according to one embodiment of the present invention. [Diagram 2] FIG. 2 is a front view of the sling shown in FIG. [Diagram 3] 2 is a plan view showing an example of a construction panel to which the hanging tool shown in FIG. 1 is fixed. [Figure 4] 1 is a cross-sectional view of a main portion of a building panel to which a hanging device is fixed. [Diagram 5] FIG. 4 is a front view showing a state in which the architectural panel shown in FIG. 3 is lifted up. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings. Fig. 1 is a plan view of a suspending tool used in a method for suspending an architectural panel according to one embodiment of the present invention. Fig. 2 is a front view of the suspending tool shown in Fig. 1. The suspending tool 1 shown in Figs. 1 and 2 is made of a metal such as stainless steel, and includes a disk-shaped base plate 2 and a mounting member 3 supported by the base plate 2.

[0013] A cross-shaped rib 10 having a pair of straight line portions 11, 12 intersecting at right angles is fixed to the upper surface of the substrate 2 by welding or the like. A cylindrical support portion 7 having a screw hole at the center is provided in the center of the rib 10 where the straight line portions 11, 12 intersect. The substrate 2 is divided into four partitions by the rib 10, each of which has a through hole 2a through which a screw (not shown) is inserted. The through holes 2a are formed by countersinking so that the head of the screw can be held flush with the upper surface of the substrate 2.

[0014] The mounting member 3 includes a block-shaped main body 4 and an engagement portion 5 that protrudes upward in an inverted U shape from the top surface of the main body 4. An insertion hole through which a bolt 6 is inserted is formed in the center of the main body 4, and the tip of the inserted bolt 6 is screwed into a screw hole in the support portion 7, so that the mounting member 3 is supported rotatably around the axis of the bolt 6.

[0015] In the method for lifting an architectural panel of this embodiment, first, the hoisting tool 1 having the above-mentioned configuration is fixed to the upper surface of the architectural panel. The architectural panel used is a cross-laminated timber (CLT) made by laminating three or more layers of multiple laminas (sawn boards) so that the fiber directions are perpendicular to each other above and below, and an appropriate number of hoisting tools 1 are used according to the shape, size, etc. of the architectural panel.

[0016] For example, when hoisting an architectural panel 100 made of rectangular flat orthogonal laminated boards as shown in Fig. 3, four hoisting devices 1 are placed at the four corners of a rectangular area A, which is a virtual area set on the upper surface of the architectural panel 100 by load calculation for slinging work. At this time, the orientation of each hoisting device 1 is aligned so that a part of a pair of straight lines 11, 12 constituting the rib 10 (straight line portion 11 in Fig. 3) is aligned along the diagonals D1, D2 of the rectangular area A.

[0017] Thereafter, screws are inserted into the four through holes of the hanging device 1, and the screws are screwed into the architectural panel 100 with an impact driver or the like, thereby fixing each hanging device 1 to the architectural panel 100. There are no particular limitations on the screws used, but screws for wood are preferred, and for example, M8 series (diameter 8 mm) of "Panellead (registered trademark) S" manufactured by Synegic Co., Ltd. can be suitably used.

[0018] The length of the screw is set so that it does not penetrate the architectural panel 100 and is screwed into three or more layers of the multiple laminas that make up the architectural panel 100. For example, as shown in the cross-sectional view of Fig. 4, in the case where the architectural panel 100 is an orthogonal laminated board composed of five lamina layers 101-105 with a thickness of 30 mm, the length of the screw 20 is set to 110 mm so that the screw 20 is screwed into the four lamina layers 101-104 from the upper surface side of the architectural panel 100. The length of the screw 20 may be set to, for example, 80 mm, so that the screw 20 is screwed into the three lamina layers 101-103, or the tip of the screw 20 may reach halfway through the lowest lamina layer 105 and the screw 20 may be screwed into the five lamina layers 101-105.

[0019] The fiber directions of the lamina layers 101-105 are mutually perpendicular between adjacent upper and lower layers, so that the threads of the screw 20 engage with three or more lamina layers to intertwine with the wood fibers in various directions, firmly fixing the screw 20 to the architectural panel 100. Even if the screw 20 passes through a knothole formed in one of the lamina layers, the engagement with the remaining multiple lamina layers prevents a decrease in the mounting strength of the screw 20. Therefore, the hanging device 1 can be easily and reliably fixed to the architectural panel 100.

[0020] After the four hoisting devices 1 are fixed to the upper surface of the architectural panel 100 in this manner, the end fittings of string-like members 30 such as slings or wires are attached to each hoisting device 1 as shown in Fig. 5, and the hoisting device 1 is hoisted by a crane or the like in a conventional manner. The hoisting angle α of the string-like members 30 shown in Fig. 5 is not necessarily limited, but it is preferable to set it to about 60 degrees, for example.

[0021] The method for lifting architectural panels of the present invention can be suitably used for lifting floor panels to the second or higher floor, and when the lifted floor panel is lowered onto the beams, it can be placed adjacent to the existing floor panel without any gaps, which can speed up the construction work. Also, since the screw holes are not exposed on the underside of the floor panel after the lifting tool is removed from the floor panel, the design can be well maintained even if the underside of the floor panel is used as the exposed ceiling surface of the floor below. [Explanation of symbols]

[0022] 1 Lifting equipment 2. Board 2a Through hole 3 Mounting parts 10. Ribs 20 bis 30 String-like member 100 Building panels

Claims

1. A method for lifting an architectural panel, comprising the steps of: fixing a hoisting tool to an upper surface of the architectural panel; attaching a string-like member to the hoisting tool; and lifting the architectural panel. The building panel is made of cross-laminated boards, The suspender includes a disk-shaped base plate and an attachment member supported by the base plate and to which the string-shaped member is attached, The substrate has a cross-shaped rib on an upper surface side, and each partition defined by the rib has a through hole through which a screw is inserted, A method for lifting an architectural panel, in which the lifting device is fixed to the orthogonal laminated board by screwing the screws into three or more layers from the top side of the orthogonal laminated board at a length that does not penetrate the orthogonal laminated board.

2. A method for lifting an architectural panel as described in claim 1, wherein the lifting devices are placed at the four corners of a rectangular area set on the upper surface of the architectural panel, and the lifting devices are fixed so that a portion of the rib is along the diagonal of the rectangular area.

3. 3. The method for hoisting an architectural panel according to claim 1, wherein the architectural panel is a floor panel having an exposed ceiling surface on the underside.

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