JP2010019371A - High-strength bolt friction joint structure and high-strength bolt friction joining method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a high-strength bolt friction joint structure and a high-strength bolt friction joining method capable of inexpensively improving stress transmission performance of joint surfaces without impairing on-site workability. <P>SOLUTION: Bending parts 3d, 4d to be bent and fit in a bolt insertion hole 1b of a joined member 1 are provided in a circumferential end side formed with bolt insertion holes of additional plates 3, 4. Bearing rings 9, 10 are interposed between a head 5b of a high-strength bolt 5, a nut 6 screwed on the high-strength bolt 5, and the additional plates 3, 4. A pair of the joined members 1 and the additional plates 3, 4 are clamped by the high-strength bolt 5, the bending parts 3d, 4d of the additional plates 3, 4 are pressed and bent by the bearing rings 9, 10, and the bending parts 3d, 4d are pressed against a circumference end 1d side of the bolt insertion hole 1b of the joined member 1. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a high-strength bolt friction joining structure and a high-strength bolt friction joining method for joining members to be joined such as steel plates and steel frames using high-strength bolts.

  Conventionally, as a method of joining members to be joined such as steel plates and steel frames, a pair of joined plates (splice plates) are installed so as to sandwich a pair of members to be joined so that one end portions are abutted with each other. 2. Description of the Related Art High-strength bolt friction joining is often used in which members and accessory plates are fastened with high-strength bolts and the members to be joined are joined to each other so that stress can be transmitted by frictional force generated on the joining surfaces of the members to be joined and the accessory plates. In general, in high-strength bolt friction welding, a required frictional force is generated by applying a red rust treatment or a blasting treatment to the joining surface of the member to be joined or the accessory plate.

  However, in the red rust treatment, the rust formation state tends to vary, and in the blast treatment, there are some differences depending on the steel type of the member, the type of shot grain, etc., but the surface roughness, that is, the height difference of the surface unevenness is 50 μm. Degree. For this reason, even when red rust treatment or blast treatment is applied to the joint surface of the member to be joined or the accessory plate, there is a limit to the increase in the friction coefficient of the joint surface. Generally, the friction coefficient (slip of the joint surface after treatment) The slip proof stress is calculated by setting a low coefficient of friction coefficient 0.45 to the design value of the coefficient.

In contrast, in order to reduce the amount of steel such as high-strength bolts and accessory plates, and to improve on-site productivity, the joint surfaces of the members to be joined and accessory plates have a high friction coefficient, and the stress transmission performance of the joint surfaces. Research and development is underway to try to improve this. And as a method of increasing the friction coefficient of the joint surface,
(1) Method of adjusting the unevenness angle and hardness of the joint surface of each member to improve the properties of the joint surface (2) Joining auxiliary members such as steel bars, piano wires, steel wire mesh, mild steel between members (3) A method of applying an adhesive to the joint surface has been proposed (see, for example, Patent Document 1, Patent Document 2, and Patent Document 3).

Here, the stress transmission mechanism in high-strength bolt friction bonding is mainly divided into adhesion resistance (adhesion between members) and digging resistance (digging up by the convex portion). And (1) In the method of improving the property of the joint surface, the frictional coefficient and the hardness of the joint surface are adjusted to realize an ideal digging resistance to achieve a high friction coefficient. Moreover, (2) In the method of interposing a joining auxiliary member, the joining auxiliary member is bitten into the joining surface of each member, and a bearing resistance is added to increase the friction coefficient. (3) In the method of applying an adhesive to the joint surfaces, a high friction coefficient is achieved by adding an adhesive resistance due to the adhesive.
Japanese Patent Laid-Open No. 10-18423 JP-A-11-106867 JP-A-8-177818

  However, in the above (1) method for improving the properties of the joint surface, surface treatment processing is difficult and processing cannot be performed at a general steel processing factory, which causes problems in delivery time and supply capacity, and further increases the processing cost. There is a problem that it is difficult to plan. Moreover, in the method of (2) interposing a joining auxiliary member, in order to obtain an ideal bearing resistance, it is necessary to arrange and construct the joining auxiliary member with high accuracy, and there is a problem in workability. Furthermore, in (3) the method of applying an adhesive to the joint surface, there are problems in the durability and fire resistance of the adhesive in addition to the on-site workability. As described above, in any method, there is a problem in on-site workability, cost, and the like, so that it is not widely spread in general.

  In view of the above circumstances, the present invention provides a high-strength bolt friction joint structure and a high-strength bolt friction joint method capable of improving the stress transmission performance of the joint surface at a low cost without impairing on-site workability. The purpose is to do.

  In order to achieve the above object, the present invention provides the following means.

  The high-strength bolt friction joining structure of the present invention is provided with a plate on the outside of a pair of members to be joined, and by tightening the pair of members to be joined and the plate with a high-strength bolt, A high-strength bolt friction joining structure for joining the members to be joined, wherein the accessory plate is formed with a bolt insertion hole having a smaller diameter than the bolt insertion hole formed in the member to be joined, and the bolt of the accessory plate A bent portion that tightens the pair of members to be joined and the accessory plate with the high-strength bolt and bends by being pressed against the peripheral end forming the insertion hole and fits into the bolt insertion hole of the member to be joined. The high-strength bolt head and / or the tip of the high-strength bolt shaft in a state where the shaft portion of the high-strength bolt is inserted through the bolt insertion hole of the joined member and the accessory plate. Between the nut screwed to the side and the accessory plate, The pair of members to be joined and the accessory plate are tightened with bolts, the bent portion of the accessory plate is pressed and bent, and the bent portion of the accessory plate is pressed against the peripheral end side of the bolt insertion hole of the member to be joined. And a supporting pressure ring to be supported is interposed.

  In this invention, the member to be joined and the accessory plate are fastened with a high-strength bolt, and the supporting ring presses the bent portion of the accessory plate with the head and / or nut of the high-strength bolt, and the supporting ring is used to attach the member. The bent portion of the plate is bent and plasticized by out-of-plane bending, and is fitted into the bolt insertion hole of the member to be joined. Further, since the joining surface of the member to be joined and the attachment plate are brought into close contact with each other by tightening with the high strength bolt, when a load is applied to the member to be joined, the attachment to the member to be joined is performed similarly to the conventional high strength bolt friction joining. The members to be joined can be joined together so that stress can be transmitted by the frictional force generated on the joining surfaces of the plates. Further, since the bent portion of the accessory plate is fitted in the bolt insertion hole of the member to be joined, when a load is applied to the member to be joined, the stress generated in one of the members to be joined is transmitted through the bent portion of the accessory plate. The bearing pressure can be transmitted to the other member to be joined. Thereby, in addition to the friction transmission of the conventional high-strength bolt friction welding, it is possible to add the bearing pressure transmission, and it is possible to improve the stress transmission performance of the joint surface.

  In the high-strength bolt friction joint structure according to the present invention, the accessory plate has a notch portion extending from a peripheral end forming the bolt insertion hole toward a radially outer side of the bolt insertion hole. It is desirable that a plurality are provided at intervals in the direction.

  In the present invention, a plurality of notches are provided at intervals in the circumferential direction on the peripheral end side where the bolt insertion hole of the accessory plate is formed, so that the notch portions adjacent to each other in the circumferential direction of the bolt insertion hole are separated. It is possible to form a plurality of bent portions. As a result, when the member to be joined and the accessory plate are fastened with a high-strength bolt, the bent portion is bent by pressing with a support ring, and the fitting member is inserted into the bolt insertion hole of the member to be joined with a high-strength bolt. While tightening, the bent portions can be reliably bent by the bearing ring and fitted into the bolt insertion holes of the members to be joined. Therefore, it is possible to reliably add bearing pressure transmission in addition to friction transmission, and it is possible to reliably improve the stress transmission performance of the joint surface.

  Furthermore, in the high-strength bolt friction joint structure of the present invention, it is more desirable that four or more notches are provided at equal intervals in the circumferential direction.

  In the present invention, by providing four or more notches, each bent portion can be bent and easily fitted into the bolt insertion hole of the member to be joined. Thereby, in addition to friction transmission, bearing pressure transmission can be added more reliably, and it becomes possible to improve the stress transmission performance of a joint surface.

  In the high-strength bolt friction joint structure of the present invention, it is further desirable that the accessory plate is formed using a steel material having a strength higher than that of the member to be joined.

  In this invention, since the accessory plate is formed using a steel plate that is thinner than the member to be joined, the bent portion can be bent, and the accessory plate is made of a steel plate having higher strength than the member to be joined. By using it, it is possible to reliably transmit the stress generated in one of the members to be bonded to the other member to be bonded through the bent portion of the accessory plate.

  Further, in the high strength bolt friction joint structure of the present invention, the bolt insertion hole of the member to be joined has a larger diameter than the dimension obtained by combining the outer diameter of the shaft portion of the high strength bolt and the thickness of the accessory plate. It is desirable that it be formed.

  In this invention, the bent portion of the bent plate is formed by forming the bolt insertion hole of the member to be joined with a diameter larger than the combined diameter of the outer diameter of the shaft portion of the high strength bolt and the thickness of the accessory plate. It is possible to securely fit into the bolt insertion hole of the member to be joined, and to reliably transmit the stress generated in one member to be joined to the other member to be joined through the bent portion. Become.

  Furthermore, in the high strength bolt friction joining structure of the present invention, it is more desirable that the bearing ring is formed with an outer diameter smaller than the diameter of the bolt insertion hole of the member to be joined.

  In this invention, the outer diameter of the bearing ring is smaller than the diameter of the bolt insertion hole of the member to be joined, so that the member to be joined and the accessory plate are fastened with a high-strength bolt, It is possible to press and support the portion closer to the tip of the bent part (the peripheral end of the bolt insertion hole of the accessory plate), and the accessory plate is securely bent by being supported by the supporting ring in a stable state. It is possible to support the bent portion by pressing it against the peripheral end side of the bolt insertion hole of the member to be joined. Thereby, it is possible to reliably transmit the stress generated in one of the members to be bonded through the bent portion to the other member to be bonded.

  In the high-strength bolt friction joint structure of the present invention, it is more desirable that the bearing ring is formed in a C shape.

  In this invention, when the member to be joined and the accessory plate are fastened with a high-strength bolt, the bearing ring presses the bent portion of the accessory plate, and the outer diameter and inner diameter are reduced according to the bent state of the bent portion. Thus, it becomes possible to deform the bearing ring. As a result, it becomes possible to press and support the portion closer to the tip of the bent portion (the peripheral end of the bolt insertion hole of the accessory plate) by the support ring, and the bent portion is supported by the support ring in a stable state. Thus, it is possible to reliably transmit the stress generated in one bonded member through the bent portion to the other bonded member.

  Furthermore, in the high strength bolt friction joining structure of the present invention, the bearing ring may be formed integrally with a washer.

  In this invention, when the washer is interposed between the nut and the accessory plate screwed to the head portion of the high strength bolt and / or the tip portion of the shaft portion of the high strength bolt, the washer and the support ring are There is no need to provide each separately, and an increase in the number of members can be suppressed.

  In the high strength bolt friction joint structure of the present invention, the support ring may be formed integrally with the head of the high strength bolt and / or the nut.

  In the present invention, since the head and / or nut of the high-strength bolt and the bearing ring are integrally formed, it is not necessary to separately provide the bearing ring, and the number of members can be eliminated.

  Furthermore, in the high-strength bolt friction joint structure of the present invention, it is more preferable that a chamfered portion that engages with a bent portion of the accessory plate is provided at a peripheral end that forms a bolt insertion hole of the member to be joined. .

  In the present invention, the contact area between the bent portion and the member to be joined can be increased by engaging the bent portion of the accessory plate with the chamfered portion. Thereby, it is possible to reliably transmit the stress generated in one of the members to be bonded through the bent portion to the other member to be bonded.

  The high-strength bolt friction joining method of the present invention is a method for joining the members to be joined by any one of the high-strength bolt friction joining structures described above, wherein the high-strength bolts are used to connect the pair of members to be joined and the attachment. The plate is tightened, and the bent portion of the accessory plate is pressed by the support ring to be bent into the bolt insertion hole of the member to be joined.

  In this invention, the member to be joined and the accessory plate are fastened with a high-strength bolt, and the supporting ring presses the bent portion of the accessory plate with the head and / or nut of the high-strength bolt, and the supporting ring is used to attach the member. The bent portion of the plate is bent and plasticized by out-of-plane bending, and is fitted into the bolt insertion hole of the member to be joined. Further, since the joining surface of the member to be joined and the attachment plate are brought into close contact with each other by tightening with the high strength bolt, when a load is applied to the member to be joined, the attachment to the member to be joined is performed similarly to the conventional high strength bolt friction joining. The members to be joined can be joined together so that stress can be transmitted by the frictional force generated on the joining surfaces of the plates. Further, since the bent portion of the accessory plate is fitted in the bolt insertion hole of the member to be joined, when a load is applied to the member to be joined, the stress generated in one of the members to be joined is transmitted through the bent portion of the accessory plate. The bearing pressure can be transmitted to the other member to be joined. As a result, it is possible to add the bearing pressure to the friction transmission of the conventional high-strength bolt friction joint, and it is possible to improve the stress transmission performance of the joint surface.

  According to the high-strength bolt friction joining structure and the high-strength bolt friction joining method of the present invention, the bent portion of the accessory plate is pressed and bent by the supporting ring while the high-strength bolt is tightened, and the bent portion is joined to the member to be joined. While fitting into the bolt insertion hole and supporting the bent part against the peripheral end side of the bolt insertion hole of the member to be joined by the support ring, it supports the friction transmission of the conventional high strength bolt friction joint Transmission can be added, and the stress transmission performance of the joint surface can be improved.

  When the bearing pressure transmission by the bent part of the accessory plate is sufficiently large, it is not necessary to perform red rust treatment or blast treatment (friction surface treatment) on the joining surface of the member to be joined or the accessory plate, and the number of member processing can be reduced. It becomes possible to reduce. Also, compared to conventional high-strength bolt friction welding, the number of members is only the bearing ring (if the bearing ring is formed integrally with the washer, the head of the high-strength bolt, and the nut, the number of members increases. In addition, since high-strength bolts can be tightened in the same manner as before, workability on site is not impaired. Furthermore, the increase in the amount of steel material and the number of members processed is small, and the increase in cost is also small. Thereby, it is possible to improve the stress transmission performance of the joint surface at a low cost without impairing the workability on site.

  Hereinafter, a high strength bolt friction joining structure and a high strength bolt friction joining method according to an embodiment of the present invention will be described with reference to FIGS. In the present embodiment, a pair of joined steel plates (members to be joined) arranged so as to face each other and a pair of accessory plates arranged so as to sandwich the joined steel plates are fastened with high-strength bolts. The present invention relates to a high-strength bolt friction bonding structure and a high-strength friction bonding method for bonding bonded steel plates to each other.

  The high-strength bolt friction joint structure A of the present embodiment includes, for example, a pair of joined steel plates 1 and 2, accessory plates 3 and 4, a high-strength bolt 5, and a nut 6 as shown in FIGS. 1 and 2. And washers 7 and 8 and pressure bearing rings 9 and 10.

  As shown in FIG. 1 to FIG. 3, the pair of bonded steel plates 1 and 2 are arranged in parallel with an interval so that the one end portions 1 a and 2 a abut each other. Each of the pair of bonded steel plates 1 and 2 has two bolt insertion holes 1b and 2b that are formed through one side from the one side to the other side at a predetermined interval on one end 1a and 2a side. Yes. The bolt insertion holes 1b and 2b of the joining steel plates 1 and 2 have a larger diameter d2 than the dimension (d1 + T) of the outer diameter d1 of the shaft portion 5a of the high strength bolt 5 and the plate thickness T of the accessory plates 3 and 4. Is formed. For example, it is formed with a diameter d2 that is about twice the dimension (d1 + T) of the outer diameter d1 of the shaft portion 5a and the thickness T of the accessory plates 3 and 4. Further, each of the bonded steel plates 1 and 2 is formed into a concavo-convex shape in which the bonding surfaces 1c and 2c on the one end portion 1a and 2a side of one surface and the other surface are blasted (or red rust treated) and the height difference is about 50 μm. .

  The accessory plates 3 and 4 are formed using a steel material that is stronger and thinner (thin plate thickness T) than the bonded steel plates 1 and 2, and as shown in FIGS. 1, 2, and 4, a pair of bonded steel plates It arrange | positions on each outer side of a pair of joining steel plates 1 and 2 so that the one end parts 1a and 2a side of 1 and 2 may be inserted | pinched. Each of the accessory plates 3 and 4 has one surface (joint surfaces 3a and 4a) blasted (or red rust treated), and is formed in an uneven shape with a height difference of about 50 μm. Further, each of the accessory plates 3 and 4 has four bolt insertion holes 3b and 4b respectively communicating with the bolt insertion hole 1b of one joining steel plate 1 and the bolt insertion hole 2b of the other joining steel plate 2 at a predetermined interval. Open from one surface (joint surfaces 3a, 4a) to the other surface. The bolt insertion holes 3b, 4b are formed with a diameter d3 smaller than the diameter d2 of the bolt insertion holes 1b, 2b formed in the bonded steel plates 1, 2.

  And the accessory plates 3 and 4 are installed so that a pair of joining steel plates 1 and 2 may be pinched | interposed, and the mutual bolt insertion hole 1b, 2b, 3b, 4b of the joining steel plates 1, 2 and the accessory plates 3, 4 may be mutually connected. In a state in which the central axes are arranged substantially on the same axis and communicated with each other (the state shown in FIG. 8A), the portions 3 and 4 are arranged on the bolt insertion holes 1b and 2b of the joining steel plates 1 and 2 of the joining plates 3 and 4 ( That is, the peripheral ends 3c and 4c side of the accessory plates 3 and 4 that form the bolt insertion holes 3b and 4b are bent portions 3d and 4d. As shown in FIG. 2, the bent portions 3 d and 4 d are inserted through the bolts of the bonded steel plates 1 and 2 in a state where the pair of bonded steel plates 1 and 2 and the pair of accessory plates 3 and 4 are fastened with a high-strength bolt 5. It bends in the holes 1b and 2b and fits into the bolt insertion holes 1b and 2b of the bonded steel plates 1 and 2. Moreover, in the accessory plates 3 and 4 of this embodiment, as shown in FIG. 5, it extends toward the outer side in the radial direction of the bolt insertion holes 3b and 4b from the peripheral ends 3c and 4c forming the bolt insertion holes 3b and 4b. Four notches 3e and 4e are provided at equal intervals in the circumferential direction of the bolt insertion holes 3b and 4b. Thus, four bent portions 3d and 4d divided by notches 3e and 4e adjacent in the circumferential direction are provided on the peripheral ends 3c and 4c side of the bolt insertion holes 3b and 4b of the accessory plates 3 and 4, respectively. ing.

  As shown in FIGS. 2, 6, and 7, the support rings 9, 10 are formed so that the inner diameter d4 is slightly larger than the outer diameter d1 of the shaft portion 5 a of the high-strength bolt 5. The diameter d5 is formed to be slightly smaller than the diameter d2 of the bolt insertion holes 1b and 2b of the bonded steel plates 1 and 2 and larger than the diameter d3 of the bolt insertion holes 3b and 4b of the accessory plates 3 and 4. . Further, the bearing rings 9 and 10 are formed in a C-shape by providing notches 9a and 10a that are notched from the inner peripheral end to the outer peripheral end.

  As shown in FIG. 2, the bearing rings 9 and 10 are inserted through the shaft portions 5a of the high-strength bolts 5 into the bolt insertion holes 1b, 2b, 3b and 4b of the joined steel plates 1 and 2 and the accessory plates 3 and 4, respectively. In this state, the shaft portion 5a of the high-strength bolt 5 is inserted together with the washers 7 and 8, and is provided between the head portion 5b of the high-strength bolt 5 and one of the supporting plates 3, and the shaft portion of the high-strength bolt 5. It is interposed between the nut 6 screwed to the front end side of 5a and the other accessory plate 4. Further, in a state where the bonded steel plates 1 and 2 and the accessory plates 3 and 4 are fastened by the high-strength bolt 5, the support rings 9 and 10 are connected to the bent portions 3d and 4d of the bent accessory plates 3 and 4, respectively. The two bolt insertion holes 1b, 2b are supported by pressing toward the peripheral ends 1d, 2d.

  Next, a method for joining the joined steel plates 1 and 2 with the high-strength bolt friction joint structure A having the above-described configuration will be described, and the operation and effect of the high-strength bolt friction joint structure A and the high-strength bolt joint method of the present embodiment will be described. Will be described.

  As shown in FIGS. 1 and 3, when joining the joined steel plates 1, 2, first, one end 2 a of the other joined steel plate 2 is abutted against one end 1 a of one joined steel plate 1, A pair of bonded steel plates 1 and 2 are arranged at predetermined positions. Next, as shown in FIGS. 1 and 8 (a), the pair of joined steel plates 1 and 2 are sandwiched, and the joined steel plates 1 and 2 and the bolt insertion holes 1b, 2b, 3b, and 4b are communicated with each other. The accessory plates 3 and 4 are installed at predetermined positions. At this time, the diameter d3 of the bolt insertion holes 3b and 4b of the accessory plates 3 and 4 is smaller than the diameter d2 of the bolt insertion holes 1b and 2b of the bonded steel plates 1 and 2, so Four bent portions 3d and 4d provided on the side of the peripheral ends 3c and 4c forming the insertion holes 3b and 4b are disposed on the bolt insertion holes 1b and 2b of the bonded steel plates 1 and 2, respectively.

  Next, as shown in FIG. 8A, the shaft portion 5a of the high-strength bolt 5 is inserted through the washer 7 and the support ring 9 in this order, and the joined steel plates 1 and 2 and the accessory plate 3 communicated with each other. The shaft portion 5a of the high-strength bolt 5 is inserted into the four bolt insertion holes 1b, 2b, 3b, 4b from the side of the one accessory plate 3. Further, the support ring 10 and the washer 8 are inserted in this order into the tip side of the shaft portion 5a of the high strength bolt 5 protruding outward from the bolt insertion hole 4b of the other accessory plate 4, and the nut 6 is screwed. .

  Then, the high-strength bolt 5 and the nut 6 are fastened so that a predetermined introduction axial force is generated in the shaft portion 5 a of the high-strength bolt 5, and the pair of joined steel plates 1 and 2 and the pair of auxiliary plates 3 are fastened by the high-strength bolt 5. 4 is tightened. As a result, as in the conventional high-strength bolt friction bonding, the bonded steel plates 1 and 2 subjected to blasting or red rust processing and the bonding surfaces 1c, 2c, 3a, and 4a of the accessory plates 3 and 4 are pressed against each other and brought into close contact with each other. .

  On the other hand, when fastening the bonded steel plates 1 and 2 and the accessory plates 3 and 4 in this way, one supporting ring 9 interposed between the one accessory plate 3 and the head 5b of the high-strength bolt 5, The other supporting plate 4 and the other supporting ring 10 interposed between the nuts 6 respectively connect the bent portions 3d and 4d of the supporting plates 3 and 4 into the bolt insertion holes 1b and 2b of the joining steel plates 1 and 2, respectively. Press towards. As a result, the bonded steel plates 1 and 2 and the accessory plates 3 and 4 are fastened with the high-strength bolts 5, and the bent portions 3d and 4d of the accessory plates 3 and 4 are bent and plasticized by out-of-plane bending. As shown in FIG. 2, the steel plates 1 and 2 are fitted into the bolt insertion holes 1 b and 2 b. Further, at this time, the bolt insertion holes 1b and 2b of the bonded steel plates 1 and 2 are formed with a larger diameter than the dimension of the outer diameter d1 of the shaft portion 5a of the high strength bolt 5 and the thickness T of the accessory plates 3 and 4. Therefore, the bent portions 3d and 4d of the bent attachment plates 3 and 4 are securely fitted into the bolt insertion holes 1b and 2b of the bonded steel plates 1 and 2, respectively.

  Further, four notches 3e and 4e are provided at equal intervals in the circumferential direction on the side of the peripheral ends 3c and 4c forming the bolt insertion holes 3b and 4b of the accessory plates 3 and 4, and the four bent portions 3d and 4d are separated. Is formed. Therefore, the bonded steel plates 1 and 2 and the accessory plates 3 and 4 are fastened with the high-strength bolts 5, and the bent portions 3d and 4d are reliably and easily bent so that the bolt insertion holes 1b of the bonded steel plates 1 and 2, Fit into 2b. Further, since the accessory plates 3 and 4 are formed using a steel plate that is thinner than the bonded steel plates 1 and 2, also from this point, the bent portions 3d and 4d are reliably and easily bent and the bonded steel plates 1 and 4 are bent. 2 is inserted into the bolt insertion holes 1b, 2b.

  Then, in a state where the bonded steel plates 1 and 2 and the accessory plates 3 and 4 are fastened with the high-strength bolts 5, the bent portions 3d and 4d of the bent attachment plates 3 and 4 are bent by the bearing rings 9 and 10, respectively. The two bolt insertion holes 1b and 2b are supported by being pressed toward the peripheral ends 1d and 2d. At this time, since the bearing rings 9 and 10 are formed so that the outer diameter d5 is smaller than the diameter d2 of the bolt insertion holes 1b and 2b of the bonded steel plates 1 and 2, the bent portions 3d and 4d have their tips ( The parts closer to the bolt insertion holes 3b and 4b of the peripheral plates 3c and 4b of the accessory plates 3 and 4 are pressed and supported by the supporting rings 9 and 10.

  Further, since the support rings 9 and 10 are formed in a C shape, when the bonded steel plates 1 and 2 and the accessory plates 3 and 4 are fastened with the high-strength bolt 5, the bent portions of the accessory plates 3 and 4 are provided. While pressing 3d and 4d, it deform | transforms so that the outer diameter d5 and the internal diameter d4 may become small according to the bending state of the bending parts 3d and 4d. Thus, in a state where the bonded steel plates 1 and 2 and the accessory plates 3 and 4 are fastened with the high-strength bolts 5, the bent portions 3d and 4d have their tips (the peripheral ends of the bolt insertion holes 3b and 4b of the accessory plates 3 and 4). The portion closer to 3c, 4c) is pressed and supported by the support ring 9,10.

  In this way, with the high-strength bolt 5 tightening the joined steel plates 1 and 2 and the accessory plates 3 and 4, the support rings 9 and 10 support the bent portions 3 d and 4 d by pressing the portions closer to the tip. Accordingly, the bent portions 3d and 4d are supported in a stable state by being pressed toward the peripheral ends 1d and 2d of the bolt insertion holes 1b and 2b of the bonded steel plates 1 and 2.

  As described above, in the high-strength bolt friction joining structure A (high-strength bolt friction joining method) of the present embodiment, the bent portions 3d of the accessory plates 3 and 4 are inserted into the bolt insertion holes 1b and 2b of the joined steel plates 1 and 2. 4d is bent and fitted, and the joining surfaces 1c, 2c, 3a, and 4a of the joined steel plates 1 and 2 and the accessory plates 3 and 4 are brought into close contact with each other with a pressing force according to the introduction axial force of the high strength bolt 5. Thus, the bonded steel plates 1 and 2 are bonded to each other through the accessory plates 3 and 4.

  When a load is applied to the bonded steel plates 1 and 2, as in the conventional high-strength bolt friction bonding, the bonded surface 1 c subjected to blasting or red rust treatment of the bonded steel plates 1 and 2 and the accessory plates 3 and 4. Stress is transmitted by the frictional force generated in 2c, 3a, 4a. Further, the bent portions 3d and 4d of the accessory plates 3 and 4 are fitted into the bolt insertion holes 1b and 2b of the bonded steel plates 1 and 2, and the bolt insertion holes 1b and 2b of the bonded steel plates 1 and 2 by the support rings 9 and 10. Since the pressure is applied to the peripheral ends 1d and 2d of the steel plates 1 and 2d, when a load is applied to the bonded steel plates 1 and 2, the stress generated in one of the bonded steel plates 1 (2) The bearing pressure is transmitted to the other bonded steel plate 2 (1) through the bent portions 3d and 4d. Further, at this time, since the accessory plates 3 and 4 are formed using a steel plate having a strength higher than that of the bonded steel plates 1 and 2, the stress generated in the bonded steel plates 1 (2) is surely increased. The bearing pressure is transmitted to the other bonded steel plate 2 (1) through the bent portions 3d and 4d. Thus, in the high-strength bolt friction joint structure A of the present embodiment, by adding a support pressure to the friction transmission of the conventional high-strength bolt friction joint, compared with the conventional high-strength bolt friction joint, The stress transmission performance of the joint surfaces 1c, 2c, 3a, and 4a is greatly improved.

  Therefore, in the high-strength bolt friction joining structure A and the high-strength bolt friction joining method of the present embodiment, the joining steel plates 1 and 2 and the accessory plates 3 and 4 are fastened with the high-strength bolt 5, and the supporting rings 9 and 10 are used. The bent portions 3d and 4d of the accessory plates 3 and 4 can be bent and fitted into the bolt insertion holes 1b and 2b of the bonded steel plates 1 and 2. Further, the joining surfaces 1c, 2c, 3a, and 4a of the joined steel plates 1 and 2 and the accessory plates 3 and 4 can be brought into close contact with each other by tightening with the high-strength bolt 5. For this reason, when a load is applied to the bonded steel plates 1 and 2, the friction generated on the bonded surfaces 1c, 2c, 3a, and 4a of the bonded steel plates 1 and 2 and the accessory plates 3 and 4 is the same as in conventional high-strength bolt friction bonding. It becomes possible to join the bonded steel plates 1 and 2 so that stress can be transmitted by force. Further, it is possible to transmit the stress generated in one bonded steel sheet 1 (2) to the other bonded steel sheet 2 (1) through the bent portions 3d and 4d of the accessory plates 3 and 4. As a result, it is possible to add the bearing pressure to the friction transmission of the conventional high-strength bolt friction joint, and it is possible to improve the stress transmission performance of the joint surfaces 1c, 2c, 3a, and 4a.

  In addition, when the bearing pressure transmission by the bent portions 3d and 4d of the accessory plates 3 and 4 is sufficiently large, red rust treatment of the joining surfaces 1c, 2c, 3a and 4a of the joined steel plates 1 and 2 and the accessory plates 3 and 4 The blasting process (friction surface process) can be eliminated, and in this case, the number of member processing can be reduced. Furthermore, compared to the conventional high-strength bolt friction joint, the number of members is increased only by the bearing rings 9 and 10, and tightening with the high-strength bolt 5 can be performed in the same manner as before, which may impair the workability on site. Absent. Furthermore, the increase in the amount of steel material and the number of members processed is small, and the increase in cost is also small. Therefore, it becomes possible to improve the stress transmission performance of the joint surfaces 1c, 2c, 3a, and 4a at a low cost without impairing the workability on site.

  Furthermore, in the high-strength bolt friction joining structure A of the present embodiment, four notches 3e are equally spaced in the circumferential direction on the peripheral ends 3c and 4c side of the accessory plates 3 and 4 forming the bolt insertion holes 3b and 4b. 4e is provided, and the four bent portions 3d and 4d are formed separately, so that the high strength bolt 5 fastens the bonded steel plates 1 and 2 and the accessory plates 3 and 4 and reliably and easily these bent portions. 3d and 4d can be bent and fitted into the bolt insertion holes 1b and 2b of the bonded steel plates 1 and 2. As a result, it is possible to reliably add the bearing pressure to the friction transmission, and it is possible to improve the stress transmission performance of the joint surfaces 1c, 2c, 3a, and 4a.

  Further, since the accessory plates 3 and 4 are formed using a steel material that is thinner than the bonded steel plates 1 and 2, the bent portions 3d and 4d can be reliably bent by being pressed by the support ring 9 and 10. It becomes possible, and the plates 3 and 4 are formed using a steel plate having a strength higher than that of the bonded steel plates 1 and 2, so that the stress generated in one of the bonded steel plates 1 (2) can be reliably transferred. It is possible to transmit the bearing pressure to the other bonded steel plate 2 (1) through the four bent portions 3d and 4d.

  Furthermore, the bolt insertion holes 1b and 2b of the bonded steel plates 1 and 2 are formed with a diameter d2 larger than the dimension of the outer diameter d1 of the shaft portion 5a of the high strength bolt 5 and the thickness T of the accessory plates 3 and 4. Accordingly, the bent portions 3d and 4d of the bent accessory plates 3 and 4 can be reliably fitted into the bolt insertion holes 1b and 2b of the bonded steel plates 1 and 2, and the bent portions 3d and 4d can be more reliably connected. It is possible to transmit the stress generated in one bonded steel sheet 1 (2) through the other to the other bonded steel sheet 2 (1).

  Further, since the outer diameter d5 of the support rings 9 and 10 is smaller than the diameter d2 of the bolt insertion holes 1b and 2b of the bonded steel plates 1 and 2, the bonded steel plates 1 and 2 and the accessory plates 3 and 4 are made higher. In a state of being tightened with the force bolt 5, the support rings 9 and 10 are used to press the portions closer to the ends of the bent portions 3d and 4d (the peripheral ends 3c and 4c of the bolt insertion holes 3b and 4b of the accessory plates 3 and 4). The bent portions 3d and 4d of the accessory plates 3 and 4 which are supported by the supporting pressure rings 9 and 10 in a stable state and are securely bent are connected to the bonded steel plates 1 and 2 in a stable manner. The bolt insertion holes 1b, 2b can be pressed and supported on the peripheral ends 1d, 2d side. This makes it possible to transmit the stress generated in one bonded steel sheet 1 (2) through the bent portions 3d and 4d to the other bonded steel sheet 2 (1) more reliably.

  Further, since the support rings 9 and 10 are formed in a C shape, the support rings 9 and 10 are attached when the bonded steel plates 1 and 2 and the accessory plates 3 and 4 are fastened with the high-strength bolt 5. By pressing the bent portions 3d and 4d of the plates 3 and 4, the support rings 9 and 10 can be deformed so that the outer diameter d5 and the inner diameter d4 are reduced according to the bent state of the bent portions 3d and 4d. Become. This makes it possible to press and support the portions closer to the tips of the bent portions 3d, 4d (the peripheral ends 3c, 4c of the bolt insertion holes 3b, 4b) of the bending plates 3d, 4d by the support rings 9, 10. Thus, the bent portions 3d and 4d are supported by the supporting rings 9 and 10 in a stable state, and the stress generated in one of the bonded steel plates 1 (2) through the bent portions 3d and 4d is more reliably applied to the other bonded steel plate 2 ( It is possible to transmit the bearing pressure to 1).

  As mentioned above, although one embodiment of the high-strength bolt friction joining structure and the high-strength bolt friction joining method according to the present invention has been described, the present invention is not limited to the above-described one embodiment, and does not depart from the spirit thereof. It can be changed as appropriate. For example, in this embodiment, although the to-be-joined member shall be the joined steel plates 1 and 2, the to-be-joined member based on this invention may be things other than steel plates, such as a steel frame, for example.

  Further, in the present embodiment, the bearing rings 9 and 10 are formed so that the outer diameter d5 is smaller than the diameter d2 of the bolt insertion holes 1b and 2b of the bonded steel plates 1 and 2. The supporting ring according to the present invention fastens the joined steel plates 1 and 2 and the accessory plates 3 and 4 with the high-strength bolts 5, and connects the bent portions 3 d and 4 d of the accessory plates 3 and 4 to the bolt insertion holes 1 b of the joined steel plates 1 and 2. If it is possible to press and support the peripheral ends 1d and 2d that form 2b, the outer diameter d5 is particularly made smaller than the diameter d2 of the bolt insertion holes 1b and 2b of the bonded steel plates 1 and 2. There is no need to limit it. For example, the bearing ring is formed in a T shape in a side view with a small diameter portion and a large diameter portion, and only the small diameter portion has an outer diameter d5 smaller than the diameter d2 of the bolt insertion holes 1b and 2b of the bonded steel plates 1 and 2. It may be so formed that it is tightened with a high-strength bolt 5, and the bent portions 3d and 4d are pressed and bent by this small diameter portion to be supported.

  Furthermore, in this embodiment, the accessory plates 3 and 4 form the four notch parts 3e and 4e in the peripheral end 3c and 4c side which forms the bolt penetration hole 3b and 4b, and it is by the notch parts 3e and 4e adjacent. Although the description has been made assuming that the four bent portions 3d and 4d are provided, the bent portion according to the present invention is fastened by the high-strength bolt 5 and the supporting steel plates 1 and 2 by the support rings 9 and 10. As long as it is formed so as to be supported by being pressed toward the peripheral ends 1d and 2d forming the bolt insertion holes 1b and 2b. In particular, the number and arrangement of the notches 3e and 4e and the bent portions 3d and 4d are limited. do not have to.

  Further, for example, as shown in FIGS. 9A and 9B, chamfered portions 1e and 2e are provided at the peripheral ends 1d and 2d forming the bolt insertion holes 1b and 2b of the bonded steel plates 1 and 2 and bent. The bent portions 3d and 4d of the accessory plates 3 and 4 may be engaged (fitted) with the chamfered portions 1e and 2e. In this case, the bent portions 3d and 4d of the accessory plates 3 and 4 are engaged with the chamfered portions 1e and 2e, so that the contact area between the bent portions 3d and 4d and the bonded steel plates 1 and 2 can be increased. For this reason, as compared with the high-strength bolt friction bonding structure A shown in the present embodiment, the stress generated in one bonded steel sheet 1 (2) through the bent portions 3d and 4d is surely supported to the other bonded steel sheet 2 (1). It is possible to transmit pressure. Further, when the chamfered portions 1e and 2e are provided in this way, the peripheral ends 1d and 2d (the peripheral end surfaces and the inner surface) of the bolt insertion holes 1b and 2b of the bonded steel plates 1 and 2 and the bolt insertion holes 1b and 2b. It is possible to reduce the play S with the shaft portion 5a of the high-strength bolt 5 inserted through the shaft. That is, the diameters of the bolt insertion holes 1b and 2b of the bonded steel plates 1 and 2 can be made small (standard size). For this reason, it becomes possible to reduce the processing effort of the bolt insertion holes 1b and 2b of the bonded steel plates 1 and 2.

  Further, for example, as shown in FIG. 10, the support rings 9 and 10 may be formed integrally with the washers 7 and 8, and for example, as shown in FIG. 11, the head 5b and nut of the high strength bolt 5 6 and the supporting pressure rings 9 and 10 may be integrally formed. In this case, since there is no increase in the number of members due to the provision of the bearing rings 9 and 10, it is possible to prevent the workability on the site from being further impaired than in the present embodiment, and the bonding surface 1c, It becomes possible to improve the stress transmission performance of 2c, 3a, 4a. Further, as shown in FIGS. 10 and 11, the bent surfaces 3d and 4d are bent by forming the outer surfaces of the supporting rings 9 and 10 pressing the bent portions 3d and 4d of the accessory plates 3 and 4 in a tapered shape. And the bearing ring 9, 10 can be increased in contact area, and the stress generated in the bonded steel sheet 1 (2) can be more reliably applied to the other bonded steel sheet 2 ( It is possible to transmit the bearing pressure to 1). For this reason, it becomes possible to improve the stress transmission performance of the joint surfaces 1c, 2c, 3a, and 4a more reliably.

It is a side view which shows the high strength bolt joining structure which concerns on one Embodiment of this invention. It is sectional drawing which shows the joined part of a to-be-joined member and a subsidiary plate in the high strength bolt joining structure which concerns on one Embodiment of this invention. It is a top view of a member to be joined. It is a top view of an attachment board. It is the top view to which the bolt insertion hole, bending part, and notch part of the accessory plate were expanded. It is a top view of a bearing ring. It is a side view of a bearing ring. It is sectional drawing which shows the state which fastens a to-be-joined member and a subsidiary plate with a high strength volt | bolt, and bends the bending part of a subsidiary plate. It is a figure which shows the modification of the high strength bolt joining structure which concerns on one Embodiment of this invention, and is sectional drawing which shows the state which clamp | tightens a to-be-joined member and a subsidiary plate with a high strength bolt, and bends the bending part of a subsidiary plate. . It is a figure which shows the modification of the high strength bolt joining structure which concerns on one Embodiment of this invention, and is sectional drawing which shows the high strength bolt joining structure comprised by integrally forming the bearing ring with the washer. It is a figure which shows the modification of the high strength bolt junction structure which concerns on one Embodiment of this invention, and is sectional drawing which shows the high strength bolt junction structure which comprised the supporting ring integrally with the head and nut of the high strength bolt It is.

Explanation of symbols

1 Joined steel sheet (members to be joined)
DESCRIPTION OF SYMBOLS 1a One end part 1b Bolt penetration hole 1c Joining surface 1d Circumferential end 1e Chamfering part 2 Joining steel plate (member to be joined)
2a One end portion 2b Bolt insertion hole 2c Joining surface 2d Circumferential end 2e Chamfering portion 3 Substituting plate 3a Joining surface 3b Bolt insertion hole 3c Peripheral end 3d Bending portion 3e Notch portion 4 Attaching plate 4a Joining surface 4b Bolt insertion hole 4c Peripheral end 4d Bending Part 4e Notch part 5 High-strength bolt 5a Shaft part 5b Head part 6 Nut 7 Washer 8 Washer 9 Supporting ring 10 Supporting ring A High-strength bolt friction joint structure T Plate thickness d1 Outside the shaft part of the high-strength bolt Diameter d2 Diameter of bolt insertion hole of joined steel sheet d3 Diameter of bolt insertion hole of accessory plate d4 Inner diameter of bearing ring d5 Outer diameter of bearing ring

Claims (11)

A high-strength bolt that joins the members to be joined via the accessory plate by providing a subsidiary plate on the outside of the pair of members to be joined and tightening the pair of members to be joined and the accessory plate with a high-strength bolt. A friction welding structure,
A bolt insertion hole having a diameter smaller than that of the bolt insertion hole formed in the member to be joined is formed in the accessory plate, and the pair of high-strength bolts are used to connect the pair of bolts to the peripheral end side of the accessory plate that forms the bolt insertion hole. A bent portion is provided that clamps and bends the member to be joined and the accessory plate, and is fitted into the bolt insertion hole of the member to be joined.
In a state where the shaft portion of the high-strength bolt is inserted into the bolt insertion hole of the member to be joined and the accessory plate, it is screwed into the head portion of the high-strength bolt and / or the distal end side of the shaft portion of the high-strength bolt. Between the nut and the accessory plate, the pair of members to be joined and the accessory plate are fastened with the high-strength bolt, and the bent portion of the accessory plate is pressed and bent, and the bent portion of the accessory plate A high-strength bolt friction joint structure is provided, in which a support ring that presses and supports the member to the peripheral end side of the bolt insertion hole of the member to be joined is interposed. The high strength bolt friction joint structure according to claim 1,
The accessory plate is provided with a plurality of notches extending from the peripheral end forming the bolt insertion hole toward the radially outer side of the bolt insertion hole with a gap in the circumferential direction of the bolt insertion hole. Features a high-strength bolt friction joint structure. In the high strength bolt friction joint structure according to claim 2,
A high-strength bolt friction joint structure, wherein four or more notches are provided at equal intervals in the circumferential direction. In the high strength bolt friction joining structure according to any one of claims 1 to 3,
A high-strength bolt friction joint structure, wherein the accessory plate is formed using a steel material that is stronger and thinner than the member to be joined. In the high strength bolt friction joining structure according to any one of claims 1 to 4,
The high-strength bolt friction joint, wherein the bolt insertion hole of the member to be joined is formed with a diameter larger than the dimension of the outer diameter of the shaft portion of the high-strength bolt and the thickness of the accessory plate. Construction. In the high strength bolt friction joining structure according to any one of claims 1 to 5,
The high-strength bolt friction joining structure, wherein the bearing ring is formed with an outer diameter smaller than a diameter of a bolt insertion hole of the member to be joined. In the high strength bolt friction joining structure according to any one of claims 1 to 6,
A high-strength bolt friction joint structure, wherein the support ring is formed in a C shape. In the high strength bolt friction joining structure according to any one of claims 1 to 6,
A high-strength bolt friction joint structure, wherein the support ring is formed integrally with a washer. In the high strength bolt friction joining structure according to any one of claims 1 to 6,
The high-strength bolt friction joint structure, wherein the support ring is formed integrally with a head of the high-strength bolt and / or the nut. In the high strength bolt friction joint structure according to any one of claims 1 to 9,
A high-strength bolt friction joining structure, wherein a chamfered portion that engages with a bent portion of the accessory plate is provided at a peripheral end that forms a bolt insertion hole of the member to be joined. A method for joining the members to be joined by the high-strength bolt friction joining structure according to any one of claims 1 to 10,
The pair of members to be joined and the accessory plate are fastened with the high-strength bolts, and the bent portion of the accessory plate is pressed by the supporting ring to be bent into the bolt insertion hole of the member to be joined. High-strength bolt friction joining method.

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