Joining structure of components, joining method of components

Abstract

When joining multiple components, even if the components include thicker parts, friction bonding can be achieved by tightening bolts. [Solution] A joining structure for joining multiple members, comprising: a joining member having through holes formed through the multiple members, being inserted into the through holes, and having holes with female threads on their inner circumferential surface opening at both ends; bolts screwed into the female threads from both ends of the joining member; and a bearing plate sandwiched between the heads of the bolts and the surface of the members.

Description

TECHNICAL FIELD

[0001] The present invention relates to a member joining structure and a member joining method. BACKGROUND ART

[0002] Conventionally, as a method for joining two members such as concrete members, there has been a method in which a through-hole penetrating both members is provided, a PC steel rod is inserted thereinto, and a tensile force is applied to the PC steel rod, thereby applying a compressive force to both members to press-bond them together.

[0003] For example, Patent Document 1 discloses, as a reinforcing structure for an opening of a reinforced concrete beam, a structure in which steel plates are arranged on both side surfaces of the beam, a tensile force is applied to a PC steel rod inserted into a hole penetrating the steel plates and the beam, after tightening a nut, the tensile force of the PC steel rod is released to apply a tension by the restoring force of the PC steel rod, thereby press-bonding the steel plates and the beam. PRIOR ART DOCUMENTS PATENT DOCUMENTS

[0004] Patent Document 1 Japanese Unexamined Patent Application Publication No. 2014-92005 SUMMARY OF THE INVENTION PROBLEM TO BE SOLVED BY THE INVENTION

[0005] When joining two members, if the thickness of the members is small, joining can be performed by, for example, inserting a bolt such as a high-strength bolt, attaching a nut to the threaded portion of the bolt, and tightening the nut or the bolt head with a shear wrench or the like. A shear wrench is small and lightweight, so it imposes a small work burden, and can also manage the torque when tightening the bolt.

[0006] However, as with the conventional technology described above, when joining thick beams to steel plates, long bolts that can penetrate the beam are difficult to obtain. For this reason, PC steel bars are used as described in Patent Document 1, but when using PC steel bars, large-scale machinery such as tensioners is required.

[0007] Furthermore, applying tension to PC steel bars using large-scale machinery such as tensioners is physically demanding work, and space must be secured to install the machinery.

[0008] The present invention has been made in view of the above points, and aims to provide a joining structure and method for members that enables friction joining by tightening bolts, even when a member with a large thickness is included in the joining of multiple members. [Means for solving the problem]

[0009] To achieve the above objective, the present invention provides a joining structure for joining multiple members, comprising: a joining member having through holes formed through the multiple members, being inserted into the through holes, and having holes with female threads on their inner circumferential surface opening at both ends; bolts screwed into the female threads from both ends of the joining member; and a bearing plate sandwiched between the heads of the bolts and the surface of the members.

[0010] In the present invention, the holes in the joining member may be provided to penetrate the joining member in the axial direction, or they may be provided from both ends of the joining member to a predetermined depth in the axial direction, leaving a solid portion in the center.

[0011] Furthermore, the present invention relates to a joining structure for joining multiple members, comprising: a joining member having a through hole formed through the multiple members, which is inserted into the through hole and has a hole with a female threaded portion on its inner circumferential surface opening at one end and a flange portion integrally provided at the other end; a bolt screwed into the female threaded portion from the one end of the joining member; and a bearing plate sandwiched between the head of the bolt and the surface of the members.

[0012] According to the present invention, by screwing a bolt into a joining member inserted into a through hole that penetrates multiple members, it is possible to friction-join members using a short bolt, even when the multiple members to be joined include members with a large thickness.

[0013] In the present invention, the plurality of members to be joined include any of the following: concrete members such as RC members, steel plates, wood members, resin members, and gypsum boards. Typically, this invention is applied when joining concrete members to each other, RC members to steel plates, or wood members to gypsum boards.

[0014] Furthermore, the present invention relates to a method for joining multiple members, wherein through holes are formed through the multiple members, a joining member is inserted into the through holes, and holes with female threads on their inner circumferential surface are provided at both ends, and bolts are screwed into the female threads from both ends of the joining member such that a bearing plate is sandwiched between the head of the bolt and the surface of the member.

[0015] Furthermore, the present invention relates to a method for joining multiple members, comprising: forming through holes that penetrate the multiple members; inserting a joining member into the through holes, the joining member having a hole with a female threaded portion on its inner circumferential surface opening at one end, and a flange portion integrally provided at the other end; and screwing a bolt into the female threaded portion from one end of the joining member such that a bearing plate is sandwiched between the head of the bolt and the surface of the member, and a compressive force acts on the multiple members from both sides by the bearing plate and the flange portion.

[0016] In the method for joining members of the present invention, the bolt may be screwed into the female threaded portion using a tool that can grip the head of the bolt and tighten it in a way that allows torque to be controlled. [Effects of the Invention]

[0017] According to the present invention, when joining a plurality of members, even when a member having a large thickness is included, friction joining can be achieved by tightening bolts. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] [Figure 1] FIG. 1 is a cross-sectional view of a member joining structure according to a first embodiment of the present invention. [Figure 2] FIG. 2 is a cross-sectional view of a member joining structure according to a second embodiment of the present invention. [Figure 3] FIG. 3 is a cross-sectional view of a member joining structure according to a third embodiment of the present invention. [Figure 4] FIG. 4 is a cross-sectional view of a member joining structure according to a fourth embodiment of the present invention. [Figure 5] FIG. 5 is a cross-sectional view of a member joining structure according to a fifth embodiment of the present invention. DETAILED DESCRIPTION OF EMBODIMENTS

[0019] Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view of a joining structure 1 for members according to a first embodiment of the present invention. The joining structure of the present embodiment joins reinforced concrete members (hereinafter referred to as RC members) 10 and 12.

[0020] As shown in FIG. 1, the RC members 10 and 12 are provided with a through-hole 14 having a circular cross-section that penetrates them. A joining member 16 is inserted into the through-hole 14. The joining member 16 in the present embodiment is a cylindrical steel member in which an axially penetrating hole 17 opens at both end faces. The cross-section of the hole 17 is circular, and female screw portions 16a and 16b are provided on the inner peripheral surface from both ends to a predetermined depth. Note that the female screw portions 16a and 16b may be provided continuously over the entire length of the joining member 16.

[0021] In addition, the joining member 16 may be manufactured by forming female screw portions 16a and 16b on the inner circumference of a thick-walled steel pipe, or may be manufactured by drilling a hole 17 in a round steel bar and forming the female screw portions 16a and 16b in this hole 17.

[0022] When a thick-walled steel pipe is used, the joining member 16 can be manufactured simply by providing female threaded portions 16a and 16b on the inner periphery of the steel pipe. Further, when drilling a hole in a round steel bar, the range of selection for the outer diameter is widened, and the degree of freedom for the inner hole diameter or wall thickness is also increased, so that the joining member 16 can be manufactured even when a thick-walled steel pipe of an appropriate size cannot be prepared.

[0023] As shown in Fig. 1, high-strength bolts 18 and 20 are screwed into the female threaded portions 16a and 16b of the joining member 16 from both ends, respectively, passing through washers 22 and 24 and bearing plates 26 and 28, respectively.

[0024] The high-strength bolts 18 and 20 are tightened with their bolt heads 18a and 20a gripped by, for example, a shear wrench and torque-controlled, so that the washers 22, 24 and the bearing plates 26, 28 are clamped between the bolt heads 18a, 20a and the surfaces of the RC members 10, 12, and thus screwed into the female threaded portions 16a, 16b of the joining member 16. This screwing force is transmitted as a compressive force to both sides of the RC members 10 and 12 via the washers 22, 24 and the bearing plates 26, 28, and the compressive force causes friction bonding between the RC member 10 and the RC member 12. The compressive force acting on the RC members 10 and 12 can be controlled by the tightening torque of the high-strength bolts 18 and 20 applied by the shear wrench.

[0025] As described above, according to the present embodiment, by inserting the joining member 16 having female threaded portions 16a and 16b on the inner peripheral surfaces of both ends into the through-hole 14 penetrating the RC members 10 and 12, the high-strength bolts 18 and 20 can be tightened from both sides of the RC members 10 and 12 to achieve friction bonding of the RC members 10 and 12.

[0026] In other words, since high-strength bolts of a length exceeding the thickness of the RC members 10 and 12 are difficult to obtain, conventionally, as described above, it was necessary to insert PC steel bars and apply tensile force to the PC steel bars using large machinery to create tension. However, in this embodiment, readily available high-strength bolts 18 and 20 that are shorter than the thickness of the RC members 10 and 12 can be used, so the joining work can be easily performed using a small, lightweight tool such as a shear runner that allows for controllable tightening torque. Furthermore, in this embodiment, since the RC members 10 and 20 are joined by friction, there is no need to fill the gap between them with a filler material such as grout.

[0027] Next, other embodiments of the present invention will be described. In each embodiment, components common to the first embodiment are denoted by the same reference numerals, and their descriptions are omitted or simplified. Similarly, the descriptions of the effects and benefits are also omitted or simplified to the same extent as in the first embodiment.

[0028] Figure 2 is a cross-sectional view showing a member joining structure 2, which is a second embodiment of the present invention. As shown in the figure, the joining member 116 in this embodiment is formed by drilling holes 117 to a predetermined depth from both end faces of a cylindrical steel member (round steel), leaving a solid portion in the center, and providing female screw portions 116a and 116b on the inner circumferential surface of the holes 117.

[0029] According to this embodiment, since the central part of the joining member 116 is solid, the strength of the joining member 116 can be increased. Furthermore, even if a thick-walled steel pipe of the appropriate size is not available, the necessary joining member 116 can be manufactured by making a hole of the desired diameter in a round steel pipe of the desired diameter.

[0030] Figure 3 is a cross-sectional view showing a third embodiment of the present invention, a joint structure 3. As shown in the figure, the joint member 216 in this embodiment has a hole 217 that extends along its entire axial length, and a female threaded portion 216a is provided on the inner circumference of the hole 217 only at one end (the upper end in Figure 3), similar to the joint member 16 of the first embodiment. On the other hand, a flange portion 216b extending outward is integrally provided at the other end of the joint member 216. The flange portion 216b is provided, for example, by welding a plate material to one end of the steel pipe constituting the joint member 216.

[0031] In the joining structure 3 of this embodiment, the joining member 216 is inserted into the through hole 14 from the lower side in Figure 3 until the flange portion 216b abuts against the lower surface of the RC member 12. In this state, the high-strength bolt 18 is screwed into the female threaded portion 216a, passing through the washer 22 and the bearing plate 26, thereby applying compressive force from both sides of the RC members 10 and 12 by the flange portion 216b and the bearing plate 26, and thereby frictionally joining the RC members 10 and 12. In this embodiment, since only one end of the joining member 216 needs to be provided with a female threaded portion 216a, the threading work can be reduced, and the number of high-strength bolts 18 can also be reduced since they only need to be attached from one end.

[0032] Figure 4 is a cross-sectional view showing a joining structure 4, which is a fourth embodiment of the present invention. In the joining structure 4 of this embodiment, the joining member 316 has a female screw portion 316a on the inner circumferential surface of a hole 317 of a predetermined depth that opens on one end face (upper end face in the figure), similar to the second embodiment in Figure 2, and a flange portion 316b is integrally provided on the other end, similar to the third embodiment in Figure 3.

[0033] In this embodiment, as in the third embodiment, by tightening the high-strength bolt 18 into the female threaded portion 316a, compressive force is applied from both sides of the RC members 10 and 12 by the flange portion 316b and the bearing plate 26, thereby enabling friction joining of the RC members 10 and 12. Furthermore, since the joining member 316 has a solid portion, the strength of the joining member 316 can be increased. Moreover, since the high-strength bolt 18 only needs to be tightened from one end of the joining member 316, the female threaded portion 316a only needs to be provided at one end of the joining member 316, thus reducing the threading work, and since the high-strength bolt 18 only needs to be attached from one end, the number of bolts can also be reduced.

[0034] Figure 5 is a cross-sectional view showing a fifth embodiment of the present invention, which is a joint structure 5. This embodiment applies the present invention to the beam reinforcement disclosed in Patent Document 1, in which reinforcing steel plates 401 and 402 are joined to an RC beam 400 from both sides.

[0035] In this embodiment, as in the first embodiment shown in Figure 1, through holes 414 are provided that penetrate the reinforcing steel plates 401, 402 and the RC beam 400. High-strength bolts 418 and 420 are screwed into the joining member 416 inserted into the through holes 414 from both sides and tightened to the surface of the reinforcing steel plates 401 and 402 via washers 422 and 424. The joining member 416 in this embodiment can also be configured in a way that the hole 417 penetrates axially, as shown in Figure 5; a configuration with a solid central part, as in the second embodiment shown in Figure 2; a configuration with a flange integrally provided on one end of a hollow member, as in the third embodiment shown in Figure 3; or a configuration with a hole only on one end into which the high-strength bolt is screwed, and a flange integrally provided on the other end, as in the fourth embodiment shown in Figure 4.

[0036] In the embodiments described above, high-strength bolts were used as bolts, but the invention is not limited to these. Depending on the required strength, other headed bolts such as medium bolts may be used, and tightening should be performed with a tool suitable for the type of bolt. For example, in the case of medium bolts, tightening can be performed using an impact wrench, for example.

[0037] Furthermore, in the above embodiment, the cross-sectional shape of the through holes 14 and 414 is circular, but if it is possible to make square holes, the outer shape of the connecting members 16, 116, 216, 316, and 416 may also be made square to match. In this case, when screwing the high-strength bolts 18 and 20 into the connecting members 16, 116, 216, 316, and 416, rotation of the connecting members 16, 116, 216, 316, and 416 inside the through hole 14 is prevented, thus improving the workability of the screwing operation.

[0038] Furthermore, although the above embodiment described the case of joining RC members to each other (RC members 10, 12) or RC members (RC beam 400) to steel plates (reinforcement steel plates 401, 402), it is not limited to these cases. It can be applied to joining members of any material, such as concrete members to steel, concrete members to wood or resin members, wood members to each other, wood members to gypsum board, etc. It can also be applied not only to joining two members, but also to joining three or more members. [Explanation of symbols]

[0039] 1, 2, 3, 4, 5 joint structure 10, 12 RC members 14,414 through holes 16, 116, 216, 316, 416 Joining members 16a, 16b, 116a, 116b, 216a, 316a Female thread section 17, 117, 217 holes 18, 20 High-strength bolts 18a, 20a Bolt heads 22, 24, 422, 424 washers 26, 28 Bearing plates 216b, 316b Flange section 400 RC beam 401, 402 reinforced steel plate

Claims

1. A joining structure for joining multiple members, Through holes are formed that penetrate the plurality of members, A joining member is inserted into the aforementioned through hole, and has holes with female threads on its inner circumferential surface opening at both ends, Bolts screwed into the female thread portion from both ends of the connecting member, A bearing plate sandwiched between the head of the bolt and the surface of the member, A joining structure for members that have the following features.

2. A joining structure for members according to claim 1, The aforementioned hole is provided through the joining member in the axial direction, or is provided from both ends of the joining member to a predetermined depth in the axial direction, leaving a solid portion in the center, in a joining structure for a member.

3. A joining structure for joining multiple members, Through holes are formed that penetrate the plurality of members, A joining member is inserted into the aforementioned through hole, and has a hole with a female threaded portion on its inner circumferential surface opening at one end, with a flange portion integrally provided at the other end. A bolt screwed into the female thread portion from one end of the connecting member, A bearing plate sandwiched between the head of the bolt and the surface of the member, A joining structure for members that have the following features.

4. A joining structure for members according to any one of claims 1 to 3, The aforementioned plurality of members are a joining structure for members including any of the following: concrete members, steel plates, wood members, resin members, and gypsum boards.

5. A method for joining multiple members, A through hole is formed that penetrates the plurality of members. A joining member is inserted into the aforementioned through hole, the joining member having holes with female threads on its inner circumferential surface opening at both ends. The bolt is screwed into the female threaded portion from both ends of the joining member such that a bearing plate is sandwiched between the head of the bolt and the surface of the member. Method of joining components.

6. A method for joining multiple members, A through hole is formed that penetrates the plurality of members. A joining member is inserted into the aforementioned through hole, the joining member having a hole with a female threaded portion on its inner circumferential surface opening at one end and a flange portion integrally provided at the other end. The bolt is screwed into the female thread portion from one end of the joining member such that a bearing plate is sandwiched between the head of the bolt and the surface of the member, and a compressive force is applied to the plurality of members from both sides by the bearing plate and the flange portion. Method of joining components.

7. A method for joining members according to claim 5 or 6, A method for joining members, comprising screwing the bolt into the female threaded portion using a tool capable of gripping the head of the bolt and tightening it in a way that allows torque control.

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