Connectors and lifting methods

Abstract

To realize a coupling device applicable to lifting operations from various directions, and a lifting method using the same. [Solution] The device comprises a flange portion 2 that is screwed to wood, wood screws 3 that screw the flange portion 2 to wood, and a connecting portion 4 that is connected to the flange portion 2 and also to a lifting device. The flange portion 2 has a plate portion 6 that is arranged along the wood and a shaft portion 7 that extends from the plate portion 6. The connecting portion 4 has a shackle 8 with connecting holes 81 at both ends and a support body 9 that has cylindrical lugs 91 that are fitted into the connecting holes 81 and is connected to the flange portion 2. The shackle 8 is rotatable around the cylindrical lugs 91 and the support body 9 is rotatable around the shaft portion 7.

Description

[Technical Field]

[0001] The present invention relates to a coupling used when lifting a structure made at least partially of wood using a hoisting apparatus, and to a lifting method of lifting a structure made at least partially of wood using a hoisting apparatus. [Background Art]

[0002] In recent years, against the background of the popularization of building materials made of CLT (also referred to as cross-laminated timber), demand for lifting a structure made at least partially of wood using a hoisting apparatus such as a crane has been increasing. As a coupling for achieving connection between a hoisting apparatus and a structure, Japanese Utility Model Laid-Open Publication No. 57-196076 (Patent Document 1) discloses a lifting jig for an architectural panel, comprising a telescopic balance beam and a lifting jig suspended from the balance beam. Further, Japanese Utility Model Laid-Open Publication No. 56-40175 (Patent Document 2) discloses a lifting jig having a retractable locking body. [Prior Art Document] [Patent Document]

[0003] [Patent Document 1] Japanese Utility Model Laid-Open Publication No. 57-196076 [Patent Document 2] Japanese Utility Model Laid-Open Publication No. 56-40175 [Summary of the Invention] [Problem to be Solved by the Invention]

[0004] The inventions described in Patent Documents 1 and 2 are assumed to be mounted on the top surface of a structure. On the other hand, in an actual construction site, there may arise demands such as a demand for lifting a structure having a coupling attached to its side surface, or a demand for erecting a structure with a coupling attached thereto. However, the inventions described in Patent Documents 1 and 2 have not responded to these demands.

[0005] Therefore, there is a need for a coupling device that can be applied to lifting operations from various directions, and a lifting method using this device. [Means for solving the problem]

[0006] The connector according to the present invention is a connector used when lifting a structure made of wood, at least partially, using a lifting device, and comprises a flange portion that is screwed to the wood, a wood screw that screws the flange portion to the wood, and a connecting portion that is connected to the flange portion and also connected to the lifting device, wherein the flange portion has a plate portion that is arranged along the wood and a shaft portion that extends from the plate portion, and the connecting portion has a shackle having connecting holes at both ends and a support body having cylindrical lugs that are fitted into the connecting holes and connected to the flange portion, wherein the shackle is rotatable around the cylindrical lugs and the support body is rotatable around the shaft portion.

[0007] The lifting method according to the present invention is a lifting method for lifting a structure made at least partially of wood using a lifting device, comprising the steps of: attaching a connector to the structure; connecting the connector to the lifting device; and operating the lifting device to lift the structure to which the connector is attached, wherein the connector comprises: a flange portion screwed to the wood; wood screws screwing the flange portion to the wood; and a connecting portion connected to the flange portion and also connected to the lifting device, wherein the flange portion has a plate portion arranged along the wood and a shaft portion extending from the plate portion, and the connecting portion has a shackle having holes at both ends and a support body having cylindrical lugs fitted into the holes and connected to the flange portion, wherein the shackle is rotatable around the cylindrical lugs and the support body is rotatable around the shaft portion.

[0008] With these configurations, the connecting part is rotatable on two axes, allowing for lifting operations from various directions.

[0009] Preferred embodiments of the present invention will be described below. However, the scope of the present invention is not limited by the examples of preferred embodiments described below.

[0010] In one embodiment, the connector according to the present invention preferably has a through hole in the flange portion that penetrates the plate portion and the shaft portion.

[0011] This configuration makes it easier to create more potential holes for wood screws, allowing for easier placement of screws in appropriate locations to avoid knots in the structure.

[0012] In one embodiment, the connector according to the present invention has a plate portion having a female threaded portion, a shaft portion having a male threaded portion that can be screwed into the female threaded portion, a head portion configured to sandwich the connector between the plate portion and the male threaded portion and the female threaded portion when the male threaded portion and the female threaded portion are screwed together, and a cylindrical portion extending between the male threaded portion and the head portion, wherein the support body has a bearing hole into which the shaft portion is fitted, and it is preferable that the length of the cylindrical portion is longer than the length of the bearing hole.

[0013] This configuration reduces interference between the support body and the head and plate sections, allowing the support body to rotate more smoothly.

[0014] In one embodiment, the connector according to the present invention preferably further comprises an anti-loosening member inserted between the female threaded portion of the screwed plate portion and the male threaded portion of the shaft portion.

[0015] This configuration makes it less likely for the screw connection between the plate and the shaft to loosen.

[0016] In one embodiment, the connector according to the present invention preferably includes a first member having a female threaded portion and a second male threaded portion on its outer surface, and a second plate-shaped member having a second female threaded portion that screws into the second male threaded portion, and which is arranged along the wood.

[0017] According to this configuration, the durability of the connector against loads, vibrations, and the like during lifting tends to be particularly enhanced.

[0018] In one aspect of the connector according to the present invention, it is preferable that the connector further comprises a spacer inserted between the flange portion and the connection portion.

[0019] According to this configuration, the flange portion and the connection portion are less likely to interfere with each other, so the connection portion tends to rotate smoothly.

[0020] Further features and advantages of the present invention will become more apparent from the following description of exemplary and non-limiting embodiments described with reference to the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] [Figure 1] It is a front cross-sectional view of the connector according to the embodiment. [Figure 2] It is a top view of the connector according to the embodiment. [Figure 3] It is a diagram showing a usage state of the connector according to the embodiment. [Figure 4] It is a front cross-sectional view of the connector according to a first modification. [Figure 5] It is a front cross-sectional view of the connector according to a second modification. [Figure 6] It is a front cross-sectional view of one aspect of the connector according to a third modification. [Figure 7] It is a front cross-sectional view of one aspect of the connector according to a third modification. [Figure 8] It is a front cross-sectional view of the connector according to a fourth modification. [Figure 9] It is a bottom view of the connector according to the fourth modification. MODES FOR CARRYING OUT THE INVENTION

[0022] Embodiments of the connector and lifting method according to the present invention will be described with reference to the drawings. Below, examples of applying the present invention to a connector 1 used when lifting a wooden panel material P (an example of a structure made at least partially of wood) and a method for lifting the panel material P using the connector 1 will be described.

[0023] [Composition of panel materials] In this embodiment, the panel material P to be lifted may, for example, be a building material made of CLT. CLT is a material in which multiple layers of sawn boards are laminated and bonded together in an arrangement where the fiber direction alternates between vertical and horizontal. Another example is that the panel material P may be a wooden frame wall constructed by combining standard structural lumber such as 2x4 or 2x6 lumber. The panel material P is used as a building material such as wall material, floor material, or roof material. In this embodiment, the case in which the entire panel material P is made of wood is described as an example, but the structure to be lifted by the present invention may be a structure made of wood at least partially, and the connector 1 is attached to the wooden part.

[0024] [Configuration of the connector] The connector 1 according to this embodiment comprises a flange portion 2, a wood screw 3, a connecting portion 4, and a spacer 5 (Figures 1 to 3). The flange portion 2 is screwed to the panel material P by the wood screw 3. The connecting portion 4 is connected to the flange portion 2 and also to a lifting device C that lifts the panel material P. The connector 1 is temporarily attached to the panel material P for the purpose of providing a portion that can be connected to the lifting device C.

[0025] The flange portion 2 is a member that is screwed to the panel material P (i.e., wood), and has a plate portion 6 arranged along the panel material P, and a shaft portion 7 extending from the plate portion 6. The shaft portion 7 is connected to the plate portion 6 by screwing. More specifically, the plate portion 6 has a female threaded portion 61, and a male threaded portion 71 provided at one end of the shaft portion 7 is screwed into the female threaded portion 61.

[0026] The plate portion 6 is a plate-shaped member, and the female screw portion 61 is provided as a through hole. In addition to the female screw portion 61, the plate portion 6 also has four holes 62. The holes 62 are provided for passing wood screws 3 through. When the wood screws 3 passed through the holes 62 are screwed into the panel material P, the plate portion 6 is screwed to the panel material P. Although the example given here shows four holes 62, the number of holes (holes for passing wood screws) provided in the flange portion in this invention is not limited. Furthermore, the position of these holes is also arbitrary.

[0027] The shaft portion 7 has a head 72 and a cylindrical portion 73 in addition to the male threaded portion 71 described above. A central hole 74 is provided in the radial center of the shaft portion 7, passing through it. When the male threaded portion 71 and the female threaded portion 61 are screwed together, the central hole 74 and the female threaded portion 61 form a continuous through hole. This through hole, like the hole 62, allows a wood screw 3 to pass through. In this embodiment, a countersunk type wood screw 3 is used, and countersunk holes are formed in the hole 62 and the central hole 74.

[0028] The flange portion 2 is configured to allow wood screws 3 to pass through a total of five holes: four holes 62 in the plate portion 6 and a through hole (center hole 74 and female threaded portion 61) that penetrates both the plate portion 6 and the shaft portion 7. However, when fastening the flange portion 2 to the panel material P, it is not necessary to pass wood screws 3 through all five holes. The number of wood screws 3 to be used can be determined by considering the weight of the panel material P, etc. Also, the holes through which the wood screws 3 pass can be determined according to purposes such as avoiding knots in the panel material P.

[0029] The shape and dimensions of the board portion 6 are arbitrary. The shape and dimensions of the board portion 6 are selected appropriately according to, for example, the weight, shape, and dimensions of the panel P to be lifted, and the number and shape of the wood screws 3 to be used.

[0030] The connecting portion 4 comprises a shackle 8 and a support body 9. The shackle 8 has connecting holes 81 at both ends. The support body 9 has cylindrical lugs 91 that are fitted into the connecting holes 81 of the shackle 8, and a bearing hole 92 into which the shaft portion 7 is fitted. Screw holes 93 are also provided in the cylindrical lugs 91.

[0031] The shackle 8 is formed by bending a rod-shaped shackle 8 while hot (or at room temperature), and during this bending process, the cylindrical lugs 91 are fitted into the connecting holes 81. The shackle 8 is fitted onto the cylindrical lugs 91 in a fixed manner and does not normally come loose, but a washer 82 and a screw 83 are provided to prevent it from coming loose even in the event of deformation due to overload. The screw 83 is screwed into the screw hole 93. Note that the innermost part of the screw hole 93 does not reach the base end of the cylindrical lugs 91. As a result, the cross-sectional area at the base end of the cylindrical lugs 91 is not impaired by the screw hole 93, and the screw hole 93 can be provided without compromising the strength of the cylindrical lugs 91.

[0032] The shackle 8 is rotatable around the lug 91. This is achieved by the fact that the inner diameter of the connecting hole 81 is slightly smaller than the outer diameter of the lug 91.

[0033] The support body 9 is connected to the flange portion 2. More specifically, the shaft portion 7 is fitted into the bearing hole 92 of the support body 9, and in this state, the male threaded portion 71 of the shaft portion 7 and the female threaded portion 61 of the plate portion 6 are screwed together, so that the support body 9 is sandwiched between the plate portion 6 and the head portion 72 of the shaft portion 7. Since the outer diameter of the head portion 72 is larger than the inner diameter of the bearing hole 92, the support body 9 will not come out of the shaft portion 7 in this state.

[0034] At this time, the cylindrical portion 73 of the shaft portion 7 is positioned opposite the inner surface of the bearing hole 92. Since both the surface of the cylindrical portion 73 and the inner surface of the bearing hole 92 are smooth surfaces, the support body 9 is rotatable around the shaft portion 7.

[0035] Furthermore, the length L1 of the cylindrical portion 73 is longer than the length L2 of the bearing hole 92. Therefore, when the male threaded portion 71 and the female threaded portion 61 are screwed together to the maximum extent, the distance between the head 72 and the plate portion 6 (which is substantially equal to the length L1 of the cylindrical portion 73) is greater than the height dimension of the support body 9 (which is substantially equal to the length L2 of the bearing hole 92). This relative size makes it less likely for the support body 9 to interfere with the head 72 and the plate portion 6, allowing the support body 9 to rotate smoothly.

[0036] Wood screws 3 can be any known type of wood screw. The number, dimensions, and shape of the wood screws 3 can be determined by considering the dimensions and weight of the panel material P. Furthermore, the dimensions of the wood screws 3 do not need to be the same for all of them; in this embodiment, an example is shown using four short wood screws 31 and one long wood screw 32. In the case where the panel material P is a building material, it is preferable that the male thread portion of the wood screw 3 has a diameter of 6 mm or more and a length of 50 mm or more, considering the actual dimensions and weight of the panel material P used as a building material.

[0037] The spacer 5 is a component inserted between the flange portion 2 and the connecting portion 4. In this embodiment, it is inserted between the plate portion 6 and the support body 9 and plays a role in adjusting the distance between the two components. Specifically, the spacer 5 is an annular component and is fitted onto the shaft portion 7 between the plate portion 6 and the support body 9. By placing the spacer 5 between the flange portion 2 and the connecting portion 4, the shackle 8 is less likely to interfere with the flange portion 2, allowing the shackle 8 to rotate more smoothly.

[0038] [Lifting method] The lifting method according to this embodiment includes the steps of: attaching the connector 1 to the panel material P; connecting the connector 1 to the lifting device C; and operating the lifting device C to lift the panel material P to which the connector 1 is attached. The lifting device C is not particularly limited and may be a crane, a chain block, or the like.

[0039] In the process of attaching the connector 1 to the panel material P, preferably, the entire surface of the plate portion 6 should be in contact with the panel material P (Figure 3). That is, the dimensions of the plate portion 6 should fit within the dimensions of the surface of the panel material P on which the connector 1 is installed. In other words, the dimensions of the connector 1 (especially the plate portion 6) to be used should be selected according to the dimensions of the panel material P to be lifted. At this time, the connector 1 may be attached to the panel material P in an assembled state, or the plate portion 6 may be attached to the panel material using wood screws 3, and then the spacer 5, connecting portion 4, and shaft portion 7 may be attached to the plate portion 6 in sequence. Furthermore, the specifications of the connecting portion 4 can be appropriately selected according to the weight and dimensions of the panel material P to be lifted, as well as the type of lifting work to be performed. For example, a shackle 8 with sufficient load-bearing capacity to support the weight of the panel material P to be lifted, and a support body 9 with dimensions that can be connected to it may be used.

[0040] The process of connecting the connector 1 and the lifting device C can be carried out using the method normally used when lifting an object to which known connectors such as eyebolts or shackles are attached using the lifting device C. That is, the rigging or other components of the lifting device C are connected to the connector 1.

[0041] The process of operating the lifting device C to lift the panel material P to which the connector 1 is attached can be carried out using the method normally used when lifting an object with the lifting device C. That is, after connecting the connector 1 and the lifting device C, the lifting device C can be operated by starting the crane motor or operating the chain of the chain hoist, thereby achieving the lifting of the panel material P.

[0042] The connector 1 according to this embodiment is screwed to the panel material P, making it less likely to fall off compared to conventional connectors that clamp and lift the object. Therefore, by using the connector 1, it is possible to lift panel materials P that are heavier than when using conventional connectors.

[0043] Furthermore, in the connector 1, the shackle 8 is rotatable around the cylindrical lug 91, and the support body 9 is rotatable around the shaft portion 7. As a result, the shackle 8 and the support body 9 automatically change their orientation depending on the direction in which the lifting device C lifts the panel material P. Therefore, when lifting the panel material P, excessive force is less likely to be applied to each part of the connector 1, and the connector 1 is less likely to detach from the panel material P. This allows the panel material P to be lifted stably. In addition, because the shackle 8 and the support body 9 change their orientation, the connector 1 can be attached to the top surface of the panel material P for lifting, to the side surface of the panel material P for lifting, and to lift the panel material P by attaching the connector 1 to the side surface of the panel material P for lifting.

[0044] [Variation] Four modified examples of the connecting device according to the present invention are described below. In the description of each modified example, components similar to those in the above embodiment are denoted by the same reference numerals, and their descriptions are omitted or simplified. The method of use when lifting the panel material P is the same for all modified examples.

[0045] (First variation) The connector 1A according to the first modified example differs from the above embodiment in the configuration of the flange portion 2A. The flange portion 2A according to this modified example has a plate portion 6A arranged along the panel material P and a shaft portion 7A extending from the plate portion 6A (Figure 4). The shaft portion 7A is connected to the plate portion 6A by screwing, similar to the above embodiment, but in the above embodiment the shaft portion 7 is screwed in from the surface side of the plate portion 6 (the side not facing the panel material P), whereas in this modified example the shaft portion 7A is screwed in from the back side of the plate portion 6A (the side facing the panel material P). When in use, the shaft portion 7A is sandwiched between the plate portion 6A and the panel material P, making it less likely to fall off.

[0046] The shaft portion 7A has a male threaded portion 71A, a head 72A, and a cylindrical portion 73A, and the function of each is the same as that of the corresponding portion in the above embodiment. The head 72A consists of a bolt portion 75 provided on the upper end side of the cylindrical portion 73A, and two nuts 76 that screw onto the bolt portion 75. By using two nuts 76, it is made less likely for the nuts 76 to loosen. Thus, the shaft portion in the present invention may be an integrated member as in the above embodiment, or it may be a member composed of multiple parts as in this modified example.

[0047] Furthermore, the shaft portion 7A has a spacer portion 77 on the lower end side of the cylindrical portion 73A. The spacer portion 77 plays the same role as the spacer 5 in the above embodiment, that is, it is inserted between the plate portion 6A and the support body 9 to adjust the distance between the two members. Thus, the spacer in the present invention may be a single component as in the above embodiment, or it may be integrated with other components (for example, the shaft member) as in this modified example.

[0048] In this modified example, the head 72A is shown to be composed of a bolt portion 75 and two nuts 76, but the number of nuts 76 may be one or three or more. However, having two nuts 76 is preferable because it makes it easier to balance making the nuts 76 less likely to loosen with ease of installation. In other words, the head of the shaft portion may include a bolt portion provided on the upper end side of the cylindrical portion and one or more nuts that screw onto the bolt portion, and it is particularly preferable that there are two nuts.

[0049] Furthermore, this modified example shows the use of wood screws 3 (hex bolts) with a different shape from those in the above embodiment. In this modified example, four short wood screws 33 and one long wood screw 34 are used.

[0050] (Second variation) The connector 1B according to the second modified example differs from the embodiment described above in the configuration of the flange portion 2B. The flange portion 2B according to this modified example has a plate portion 6B arranged along the panel material P and a shaft portion 7 extending from the plate portion 6B (Figure 5). The plate portion 6B according to this modified example includes a first member 63 that screws into the shaft portion 7 and a plate-shaped second member 64 that screws into the first member 63. The configuration of the shaft portion 7 is the same as in the embodiment described above. The configuration of the wood screw 3 is also the same as in the first modified example.

[0051] The first member 63 has a female threaded portion 61 that screws into the male threaded portion 71 of the shaft portion 7, and also has a second male threaded portion 65 on its outer surface. The second member 64 has a second female threaded portion 66 that screws into the second male threaded portion 65, and is arranged along the panel material P. The second male threaded portion 65 is provided on the back side (the side facing the panel material P) of the plate portion 6B, and the first member 63 is screwed into the back side of the plate portion 6B. When in use, the first member 63 is sandwiched between the plate portion 6B and the panel material P, making it difficult to fall out.

[0052] Furthermore, the first member 63 has a spacer portion 67 that protrudes from the surface side (the side not facing the panel material P) of the second member 64. The spacer portion 67 plays the same role as the spacer 5 in the above embodiment.

[0053] (Third variation) The connector 1C according to the third modified example differs from the above embodiment in the configuration of the flange portion 2C. The flange portion 2C according to this modified example has a plate portion 6C arranged along the panel material P and a shaft portion 7C extending from the plate portion 6C (Figures 6 and 7). The plate portion 6C and the shaft portion 7C are connected by the fitting male portion 78 of the shaft portion 7C fitting into the fitting hole 68 of the plate portion 6C. Similar to the first and second modified examples, the shaft portion 7C is sandwiched between the plate portion 6C and the panel material P, making it difficult to fall off.

[0054] The shaft portion 7C has a fitting male portion 78, a head portion 72C, and a cylindrical portion 73C. The head portion 72C consists of a bolt portion 75 provided on the upper end side of the cylindrical portion 73C, a nut 76 that screws onto the bolt portion 75, and a roll pin 79 that is inserted through the bolt portion 75 and the nut 76. In this modified example, the roll pin 79 is used to prevent the nut 76 from loosening. The shaft portion 7C may be made by machining a dedicated part as shown in Figure 6, or by machining a general-purpose countersunk screw as shown in Figure 7. In addition, the fitting male portion 78 may also serve the same role as the spacer 5 in the above embodiment as shown in Figure 6, or the spacer 5 may be provided separately from the shaft portion 7C as shown in Figure 7.

[0055] In this modified example, there is no through-hole that penetrates the shaft portion 7C, and therefore no wood screw is inserted there. As in this example, the flange portion 2C may be fixed to the panel material P only by the wood screw 3 (short wood screw 33) that is fixed to the plate portion 6C.

[0056] (Fourth variation) The fourth modified connector 1D differs from the above embodiment in that it further includes an anti-loosening member 10 inserted between the female threaded portion 61D of the plate portion 6D and the male threaded portion 71D of the shaft portion 7D (Figures 8 and 9). The anti-loosening member 10 prevents loosening of the screw by interfering with both the female threaded portion 61D and the male threaded portion 71D, and is inserted from the back side of the plate portion 6D (the side facing the panel material P) into the screw-fitting surface between the female threaded portion 61D and the male threaded portion 71D. Specifically, the anti-loosening member 10 may be a set screw, wedge, sealant, or the like.

[0057] The female threaded portion 61D and the male threaded portion 71D are provided with notches into which the anti-loosening member 10 is inserted. When the female threaded portion 61D and the male threaded portion 71D are screwed together, a hole is formed into which the anti-loosening member 10 can be inserted when the notches on both are aligned. However, the configuration in which notches are provided on both the female threaded portion 61D and the male threaded portion 71D is merely one example of a configuration that enables the installation of the anti-loosening member 10. For example, a notch may be provided on only one of the female threaded portion 61D or the male threaded portion 71D.

[0058] In this modified example, there is no through-hole that penetrates the shaft portion 7D, and therefore no wood screw is inserted there. In this respect, it is the same as the third modified example. Also, as is clear from Figures 2 and 9, the arrangement and number of holes 62 in the plate portion 6 of the above embodiment and the holes 62 in the plate portion 6D of this modified example are different. As mentioned above, the number and position of holes for passing wood screws are arbitrary in the present invention, and this will become clearer by comparing the above embodiment with this modified example.

[0059] [Other Embodiments] Finally, other embodiments of the coupling device and lifting method according to the present invention will be described. Note that the configurations disclosed in each of the following embodiments can be applied in combination with configurations disclosed in other embodiments, provided that no inconsistencies arise.

[0060] In the above embodiment, a configuration in which the flange portion 2 has through holes that penetrate the plate portion 6 and the shaft portion 7 was described as an example. However, in the present invention, the presence or absence of through holes that penetrate the plate portion and the shaft portion is optional. As mentioned above, the through holes are one of the candidates for holes through which wood screws pass, but the present invention does not require that wood screws be passed through them. However, if through holes are provided, the options for holes through which wood screws pass are broadened, which is advantageous, for example, in terms of avoiding knots in the wood. On the other hand, if through holes are not provided, it is advantageous in terms of ease of manufacturing the shaft portion and the strength of the shaft portion compared to a configuration with through holes.

[0061] In the above embodiment, a configuration in which the flange portion 2 has a plate portion 6 and a shaft portion 7 that can be screwed together was described as an example, but the configuration of the plate portion and shaft portion in the present invention is not limited to the above example. For example, the plate portion and the shaft portion may be welded together.

[0062] In the above embodiment, a configuration was described in which the plate portion 6 is flat and the connector 1 is attached to the flat portion of the panel material P. However, in the present invention, the plate portion is not limited to being flat. For example, if the structure to be lifted has a curved surface, the shape of the plate member may be curved to conform to that curved surface.

[0063] In the above embodiment, a configuration was described as in which the length L1 of the cylindrical portion 73 is longer than the length L2 of the bearing hole 92, thereby making it less likely for the support body 9 to interfere with the head portion 72 and the plate portion 6. However, in the present invention, the dimensional relationship between the support body and the shaft portion of the flange portion is arbitrary. For example, even if the support body and the flange portion are prone to interference, the rotation of the support body can be made smoother by taking measures to improve the sliding of the interfering surfaces (such as applying a lubricant).

[0064] The above-described embodiments are intended to explain the technical concept of the invention, and when actually implementing the present invention, necessary modifications may be made to the extent that they do not impair the technical concept. For example, although the above embodiment does not mention the clearance between each component, a clearance may be provided as appropriate for purposes such as allowing each component to operate smoothly. The size of such a clearance is not particularly limited, but it may be, for example, about 0.3 to 0.5 mm.

[0065] With regard to other configurations, the embodiments disclosed herein are illustrative in all respects, and it should be understood that the scope of the present invention is not limited thereto. Those skilled in the art will readily understand that modifications can be made as appropriate without departing from the spirit of the invention. Therefore, other embodiments modified without departing from the spirit of the invention are naturally included within the scope of the present invention. [Industrial applicability]

[0066] This invention can be applied to lifting structures made of at least part wood, such as those used as building materials. [Explanation of Symbols]

[0067] [Embodiment] 1: Connector 2: Flange section 3: Wood screws 4:Connection part 5: Spacer 6: Plate part 61: Female threaded section 62: Hole 7: Shaft part 71: Male threaded section 72:Head 73: Cylindrical part 74: Center hole 8: Shackle 81: Connecting hole 82: Washer 83: Bis 9: Support body 91: tube ears 92:Bearing hole 93: Screw hole C: Lifting device P: Panel material

[0068] [First variation] 1A: Connector (first modified example) 2A: Flange section 6A: Plate part 7A: Shaft part 71A: Male threaded section 72A: Head 73A: Cylindrical part 75: Bolt part 76: Nut 77: Spacer part

[0069] [Second variation] 1B: Connector (second variation) 2B: Flange section 6B: Plate part 63: First component 64: Second component 65: Second male thread section 66: Second female thread section 67: Spacer part

[0070] [Third variation] 1C: Connector (third variation) 2C: Flange section 6C: Plate part 68: Fitting hole 7C: Shaft part 78: Fitting male part 79: Roll Pin

[0071] [Fourth variation] 1D: Connector (fourth variation) 6D: Plate part 61D: Female thread section 7D: Shaft part 71D: Male threaded section 10: Anti-loosening member

Claims

1. A coupling device used when lifting a structure made of wood, at least partially, using a lifting device, A flange portion that is screwed to the aforementioned wood, A wood screw for fastening the flange portion to the wood, It comprises a connecting portion that is connected to the flange portion and also connected to the lifting device, The flange portion has a plate portion arranged along the wood and a shaft portion extending from the plate portion. The connecting portion comprises a shackle having connecting holes at both ends, and a support body having cylindrical lugs fitted into the connecting holes and connected to the flange portion. The shackle is rotatable around the cylindrical lug, and A connector in which the support body is rotatable around the shaft portion.

2. The connector according to claim 1, wherein the flange portion has a through hole that penetrates the plate portion and the shaft portion.

3. The plate portion has a female screw portion, The shaft portion has a male threaded portion that can be screwed into the female threaded portion, a head portion configured to sandwich the connecting portion between itself and the plate portion when the male threaded portion and the female threaded portion are screwed together, and a cylindrical portion extending between the male threaded portion and the head portion. The support body has a bearing hole into which the shaft portion is fitted, The connector according to claim 1, wherein the length of the cylindrical portion is longer than the length of the bearing hole.

4. The connector according to claim 3, further comprising a loosening prevention member inserted between the female threaded portion of the screwed plate portion and the male threaded portion of the shaft portion.

5. The aforementioned plate portion, A first member having the aforementioned female thread portion and a second male thread portion on its outer surface, The connector according to claim 3, further comprising a plate-shaped second member having a second female threaded portion that engages with the second male threaded portion, and arranged along the wood.

6. The connector according to claim 1, further comprising a spacer inserted between the flange portion and the connecting portion.

7. A lifting method for lifting a structure made of wood, at least partially, using a lifting device, The process of attaching the connector to the structure, A step of connecting the aforementioned connector and the aforementioned lifting device, The process includes operating the lifting device to lift the structure to which the connector is attached, The aforementioned connector, A flange portion that is screwed to the aforementioned wood, A wood screw for fastening the flange portion to the wood, It comprises a connecting portion that is connected to the flange portion and also connected to the lifting device, The flange portion has a plate portion arranged along the wood and a shaft portion extending from the plate portion. The connecting portion comprises a shackle having holes at both ends, and a support body having cylindrical lugs fitted into the holes and connected to the flange portion. The shackle is rotatable around the cylindrical lug, and A lifting method in which the support body is rotatable around the shaft portion.

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