JPH07173878A - Joining auxiliary member for high strength bolt joint and coupling fitment - Google Patents

Abstract

PURPOSE:To stably generate a given slide yield strength and to eliminate a need for a process, such as rusting, at a steel frame processing factory to generate the slide yield strength of a joint. CONSTITUTION:A plate-form body 3 has a strength and hardness equivalent to or higher than those of a parent material 8 and a splice joint 5 and has a bolt hole 2 formed in a central part and size of a range wide enough to exercise the influence of the fastening force of a single high strength bolt 10. A plurality of liner and parallel blade-form protrusions 4 with a shoulder are formed at least in one surface of the plate-form body. By fastening the parent material and splice joint by the high strength bolt, the cutting edge 4b of the blade-form protrusion with a shoulder part is cut through the parent material or the parent material and the splice joint to its root part. A shoulder part 4a is adhered to the parent material or wears to provide a slide yield strength in one way.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joining assisting member and a joint fitting used for a high-strength bolt joint of a steel frame structure material (including a structural material such as stainless steel).

[0002]

2. Description of the Related Art High-strength bolt joining is a joining method for steel-framed structural materials using high-strength bolts (high-tensile bolts), and is a construction method in which an axial force is introduced into the bolts to strongly tighten the joining members together. It is roughly classified into three types: friction welding, tensile welding and bearing welding. Friction welding attempts to transmit the stress in the direction perpendicular to the bolt axis by utilizing the resistance force (slip resistance) to slip caused by the friction that acts between the joining members.
It is a so-called shear type joining method, and tensile joining is
It is a so-called tensile type joining method that tries to transmit stress in the axial direction of the bolt.Furthermore, bearing welding is a shear type similar to friction welding, and it is a slight slip deformation when slip occurs at the initial stage of loading. This is a joining method that attempts to shift to bearing support joining similar to rivet joining.

Conventionally, in a high-strength bolted joint made of steel frame, in order to increase the slip resistance at the joint surface between the base material and the addition plate or joint fitting, the surface roughness of the joint surface of the base material or the attachment plate is increased. For example, red rust or shot blast is used to increase the friction, and tightening of high-strength bolts causes friction to obtain a predetermined slip coefficient (μ = 0.45). The former method of using red rust is a method of removing the black skin on the surface of the steel plate with a grinder grinder, etc. and exposing the polished surface to the atmosphere for about 2 to 3 weeks to generate red rust, and the latter of shot blast is used. The method is a method in which the surface of the steel sheet is subjected to shot blasting to form a rough and appropriate uneven state. On the other hand, in the case of galvanized or painted steel frame structure, stainless steel structure, or the like, there are various problems in the high-strength bolt joint portion of friction joint.

[0004]

However, the conventional high-strength bolt joint should not slip (μ = 1.0).
Is ideal, but it is unavoidable that a predetermined slip coefficient is obtained by rusting, etc., so there is variation in the slip coefficient of the joint surface, and it is difficult to control the sufficient slip resistance of the high strength bolt joint. . In addition, both the method of generating red rust to obtain slip resistance and the method of performing shot blasting are performed in the steel processing factory, but a crane, grinder sander, and shot blasting machine to move the members are required. At the same time, great effort is required. In particular, the occurrence of red rust is a bottleneck in the steel processing process because it requires a time and a place for leaving it for a certain amount of rust to occur. Furthermore, there are structural materials that cannot use red rust, shot blast, and the like. Therefore, the present invention is a joint for high-strength bolt joints that can stably obtain a required slip resistance and can eliminate the processing step of a steel frame structure material in a steel frame processing factory for increasing the slip resistance of a joint surface. An object is to provide an auxiliary member and a joint fitting.

[0005]

In order to solve the above-mentioned problems, a first joining member for a high-strength bolt joint according to the present invention is interposed between a base material and an attachment plate in the high-strength bolt joint. It is a joining auxiliary member to be mounted, which has strength and hardness equal to or higher than those of the base material and the addition plate, has a bolt hole in the center, and is affected by the tightening force of one high-strength bolt. On at least one surface of the plate-like body having a size of the range, a plurality of parallel blade-shaped blade-like projections with shoulders, or a ring-like projection,
It is characterized in that the blade-shaped projections with shoulders are formed in a spiral shape, a radial shape, a grid shape (including a mesh shape, the same applies hereinafter) or a combination thereof. Further, the second high-strength bolt joining portion joining auxiliary member is a joining auxiliary member interposed between the base material and the addition plate or the like in the high-strength bolt joining portion, and is connected to the base material or the addition plate or the like. At least one side of a plate-like body that has strength and hardness equal to or higher than that of the ring-shaped, spiral-shaped, radial-shaped, lattice-shaped, or a combination of these, over the range that is affected by the tightening force of one high-strength bolt. In addition, it is characterized in that a blade-shaped projection having a width appropriately smaller than the width of the plate-shaped body or a plurality of pyramidal projections having one side appropriately smaller than the width of the plate-shaped body is formed. Furthermore, the high-strength bolt joint joint fitting of the present invention is a joint fitting such as an addition plate joined to the base material in the high-strength bolt joint, while having strength and hardness equal to or higher than the base material, A plurality of parallel blade-shaped projections with shoulders that form a straight line over a range that is affected by the tightening force of one high-strength bolt around the bolt hole on the joint surface to be joined to the base material, or A ring-shaped, spiral-shaped, radial-shaped, lattice-shaped, or a combination of these is formed to form a blade-shaped protrusion with a shoulder portion.

[0006]

In the first joining member for joining a high-strength bolt according to the present invention, the blade portion of the blade-shaped projection with a shoulder portion is the base material or the base material by tightening the base material and the attachment plate with the high-strength bolt. And the base plate or the base material and the shoulder part adheres to the base plate or the base plate, or the base plate and the base plate or the like are in contact with or destroyed, so that slip resistance in one direction or in all directions can be obtained. Further, in the second joining member for high-strength bolt joining portion, the plate-like body functions as a shoulder portion,
The same operation as the first one is achieved. Further, in the joint fitting for high-strength bolt joints, the joint fitting itself such as the attachment plate or the T-shaped joint is provided with the blade-like projection with the shoulder portion, and the same operation as the first one is achieved.

As a material for the plate-like body and joint fitting having strength and hardness equal to or higher than that of the base material, high-tensile steel, stainless steel, ceramics, cemented carbide or cermet is used. It is preferable to arrange several types of joining assisting members having different thicknesses in the range of about 1 to 10 mm including the blade-like protrusions with shoulders, and by doing so, when joining base materials having different thicknesses. Can have a plate thickness adjusting function. The shape of the plate-like body having a size within the range of the tightening force of one high-strength bolt is preferably circular in terms of processing, but may be oval, rectangular, or any other shape. When the blade-shaped projection with shoulders is formed on only one side, the plate-like body is welded or bonded to the joint surface around the bolt hole of the attachment plate or the joint fitting, or around the bolt hole. It is preferable to fit or fit into the counterbore recess and join them by welding, an adhesive, or the like. Further, even when the blade-like projections with shoulders are formed on both sides, the plate-like body is fitted into or fitted into the counterbore recessed portion around the bolt holes of the add-on plate or the joint fitting, and is joined by welding, adhesive or the like. You may do it. When the shoulder-shaped blade-shaped protrusions are formed on both sides, the shoulder-shaped blade-shaped protrusions having different shapes may be used instead of having the same shape on both sides.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 are drawings showing a first embodiment of a joining auxiliary member for a high-strength bolt joining portion of the present invention. This high-strength bolt joining portion joining assistant member 1 has a bolt hole 2 at the center thereof.
One side of the circular plate-like body 3 having a (top surface in FIG. 2)
In addition, a plurality of parallel straight lines (3 in the embodiment
The blade-like projections 4 with shoulders are integrally formed. Then, the joining assisting member 1 is made of high-tensile steel having strength and hardness equal to or higher than those of a base material and an attached plate described later,
The size of the range affected by the tightening force of one high-strength bolt,
For example, high-strength bolt diameter 16 to 30 mm, thickness of attached plate 12 m
In the case of m, the outer diameter is about 40 to 90 mm, and several different types are prepared within the range of about 1 to 20 mm in thickness including the blade-shaped projections with shoulders 4.

By the way, a blade-like projection without a shoulder (blade angle: 45 °, blade height: 3 mm, blade length: 135.8)
When measuring the relationship between the bolt tightening load and the bite amount in the high-strength bolted joint using a joining auxiliary member having a (mm), it is related to the height of the blade and the shape of the shoulder to increase the slip resistance. I understood it. Therefore, for example, if a shape is made such that about 70% of the bolt axial force is distributed to the blade portion and the remaining 30% is distributed to the shoulder portion, the shoulder portion presses around the bite portion that has been bitten. The joint surface such as an attachment plate or an attachment plate is pressed as a compressive force. Therefore, when a lateral force is applied to the blade, it becomes the resultant force with the compressive force of the shoulder, further increasing the slip resistance. As a result, in the shoulder-shaped blade-shaped projection 4, the height of the shoulder 4a is 0.5 to 5 mm, and the width of the shoulder 4a including the blade 4b is preferably 3 to 15 mm.
Further, the angle of the blade portion 4b is 20 to 90 °, the height of the blade portion 4b is 0.5 to 3.0 mm, and the length of the blade portion 4b is 45 to 225 m.
It has been found that m is preferred.

The joining assisting member 1 having the above structure is shown in FIGS.
As shown in FIG. 5, the blade is fitted in the counterbore recess 7 around the bolt hole 6 of the attachment plate 5 made of a structural material such as SS400 and welded all around, and in this state, the blade with the shoulder portion is used. The protrusions 4 project from the joint surface of the attachment plate 5. Then, a base material 8 made of a structural material similar to that of the attachment plate 5 and linearly butted against each other, and the attachment plate 5 arranged on both sides across the end portions of both the base materials 8. The bolt holes 6, the bolt holes 2 of the joining assisting member 1, and the bolt holes 9 of the base material 8 are passed through each of the required number (two in the embodiment) of the high-strength bolts 10 to tighten the shoulders. The blade portion 4b of the blade-shaped projection 4 with a part cuts into the joint surface of the base material 8 to the root, and the shoulder portion 4a is brought into close contact with the joint surface of the base material 8 or is destroyed, and Slip resistance can be obtained in one direction perpendicular to the existing direction.

Here, a slip proof test was conducted using the above-mentioned joining auxiliary member 1 of the first embodiment as shown in FIGS. 3 and 4, and the sum of initial introduction axial forces Nt was obtained after 30 minutes. Axial force residual rate Re1, slip load Ps, and slip coefficient μ
(Μ = Ps / 2Nt) is as shown in Table 1, and the relationship between the axial force decrease and time and the relationship between the tensile load and the displacement amount are shown in FIG. 5 and FIG. 6 (both show the test body SA2). )It became so.

[0012]

[Table 1]

The plate-like body of each test body in the table has a thickness of 3 mm,
The outer diameter is 50 mm, the inner diameter is 23 mm, and the blade-shaped projection with shoulders is
Width of shoulder (including blade) 4 mm, height 1 mm, angle of blade SA type 45 °, SB type 60 °, length SA1 type 135.8 mm, SB2 type and SA2 type 8
It is 9.0 mm. From Table 1, if the angle of the blade is 45 ° and the length is 89.0 mm, the slip resistance can be increased and the change in the bolt axial force at the time of tightening the bolt can be reduced to stabilize early as shown in FIG. I understand. The test sample SA
1 and SB2 also showed similar properties. Then, as shown in FIG. 6 showing the result of the slip proof test, the blade portion of each of the blade-shaped projections with shoulders ruptures from the root at the time when the maximum tensile load (slip resistance) is exhibited, and then the shoulder portion It was found that the condition changed to slip resistance, and it was found that this shape produces very stable slip resistance. The same applies to the test bodies SA1 and SB2.

FIGS. 7, 8, 9 and 10 are views showing a second embodiment, a third embodiment and a fourth embodiment of the joining assisting member for the high strength bolt joining portion of the present invention. In the joining assisting member 11 of FIGS. 7 and 8, a ring-shaped shouldered blade-shaped projection 14 centered on the bolt hole 12 is integrally formed on one surface of a circular plate-shaped body 13 having a bolt hole 12 at the center. The joining assisting member 15 shown in FIG. 9 has a blade-shaped protrusion 18 with a spiral shoulder centered on the bolt hole 16 on one side of a circular plate-shaped body 17 having a bolt hole 16 at the center. Is integrally formed, and further, FIG.
The joining assisting member 19 is formed by integrally forming a radial blade-shaped projection 22 with a shoulder centered on the bolt hole 20 on one surface of a circular plate-like body 21 having a bolt hole 20 at the center. There is. These joining auxiliary members 11, 15 and 19 are used in the same manner as in the first embodiment,
Except for showing slip resistance in all directions, almost the same action and effect are exhibited. The plate-shaped bodies 3, 13, 17, 21 are not limited to circular shapes, but may be oval shapes, rectangular shapes, or other shapes. Further, the blade-shaped protrusions 4, 14, 18, 22 with shoulders are formed by the plate-shaped members 3, 1
It is not limited to one side of 3, 17, 21 and may be integrally formed on both sides. Blade-shaped protrusions 4, 14, 1 with shoulders on both sides
In the case where the base plates 8 and 22 are provided, they may be directly interposed between the base material 8 and the attachment plate 5 or the like, or they may be fitted into the counterbore recesses 7 around the bolt holes 6 of the attachment plate 5 or the like. You may make it fit and join by welding, an adhesive agent, etc.

11 and 12 are views showing a fifth embodiment of the joining assisting member for a high-strength bolt joining portion according to the present invention. The joining auxiliary member 23 has strength and hardness equal to or higher than those of the base material and the addition plate, and both sides of the ring-shaped plate-shaped body 24 over the range affected by the tightening force of one high-strength bolt. In addition, a blade-shaped projection 25 having a width appropriately smaller than the width of the plate-shaped body 24 is integrally formed. The joining assisting member 23 having the above-described configuration is interposed between the base material and the additional plate so as to coaxially surround the bolt holes, and the blade-shaped projection 25 is attached to the base material and the like by the tightening of the high-strength bolt. Bite and plate 24
Is the joining assisting member 1, 11, 15, 1 of each embodiment described above.
It functions as the shoulder portion 4a of the stepped blade-shaped projections 4, 14, 18, 22 of 9 and is brought into close contact with or dented into the base material or the like, and slip resistance in all directions is obtained.

13 and 14 are views showing a sixth embodiment of the joining auxiliary member for a high-strength bolt joining portion according to the present invention. The joining assisting member 26 has strength and hardness equal to or higher than those of the base material, the addition plate, and the like, and has a ring-shaped outer plate-shaped portion 27a over a range affected by the tightening force of one high-strength bolt. , A ring-shaped inner plate-shaped portion 27 having a diameter appropriately smaller than the outer plate-shaped portion 27a
b and both sides of the plate-shaped body 27 composed of connecting plate-shaped portions 27a and 27b concentrically connected to each other and having a radial connecting plate-shaped portion 27c, each having a width appropriately smaller than the width of each plate-shaped portion 27a, 27b, 27c. The blade-like protrusions 28 are integrally formed. The joining assisting member 26 having the above-mentioned configuration is used in the same manner as that of the fifth embodiment and has substantially the same action.

FIGS. 15 and 16 are views showing a seventh embodiment of the joining assisting member for the high strength bolt joining portion of the present invention. The joining assisting member 29 has a plurality of pyramidal protrusions 31 (in the embodiment, having a side that is appropriately smaller than the width of the plate-shaped body 30 on both sides of the plate-shaped body 30 having the same properties as those of the fifth embodiment. Is a quadrangular pyramid). The joining assisting member 29 having the above structure is used in the same manner as that of the fifth embodiment, and has substantially the same action.

In the fifth to seventh embodiments, the case where the blade-shaped projections 25, 28 and the pyramidal projections 31 are formed on both sides of the plate-like bodies 24, 27, 30 has been described. It may be integrally formed on only one side. The usage mode in this case is the same as that of the first to fourth embodiments. Further, the plate-like bodies 24, 27, 30 are not limited to the ring shape and the concentric circle shape, and may have a spiral shape, a radial shape, a grid shape, or a combination thereof.

FIG. 17 and FIG. 18 are drawings showing an attachment plate as one embodiment of a joint metal fitting for a high-strength bolt joint according to the present invention. The addition plate 32 has a rectangular flat plate-shaped addition plate body 33 having strength and hardness equal to or higher than that of the base material, and a plurality of bolt holes 34 through which high-strength bolts are inserted, provided at appropriate pitches. Then, each bolt hole 34 on the joining surface to be joined to the base material
A plurality of straight blade-shaped blade-like projections 35 with shoulder portions are integrally formed over the range around the tightening force of one high-strength bolt. Attachment plate 3 having the above configuration
2 is disposed on both sides across the ends of the base materials that are linearly butted together, and by tightening high-strength bolts inserted into the bolt holes 34 and the bolt holes of the base material, the blade shape with shoulder portion is formed. The blade of the protrusion 35 cuts into the joint surface of the base material to the root,
In addition, the shoulder portion is brought into close contact with the joint surface of the base material or is destroyed, so that the sliding resistance in one direction perpendicular to the extending direction of the shouldered blade-like protrusion 35 can be obtained.

In the above embodiment, the attachment plate 32 as the joint fitting has been described, but the present invention is not limited to this, and the present invention can be applied to a T-shaped joint and other joint fittings. Further, the shoulder-shaped blade-shaped projection 35 is not limited to a linear shape, and may have a ring shape, a spiral shape, a radial shape, a lattice shape, or a combination thereof.

In each of the above-mentioned embodiments, high-strength steel is exemplified as having strength and hardness equal to or higher than that of the base material, but the invention is not limited to this, and strength and hardness equal to or higher than SS400 and the like. You may use the stainless steel, ceramics, cemented carbide, or cermet which it has. Further, the joining assisting members 1, 11, 15, 19, 23, 26, 29 and the joints are not limited to the case where they are used for the high-strength bolt joints of friction joining, but also for the high-strength bolt joints of tensile joining or bearing joint. You may use.

[0022]

As described above, according to the joining auxiliary member for the high-strength bolt joining portion and the joint fitting of the present invention, the shoulder portion can be formed by tightening the base material with the high-strength bolt and the attachment plate or the joint fitting. The blade part of the attached blade-shaped protrusion or the pyramid-shaped protrusion bites into the base material or the base material and the attachment plate uniformly and surely, and slip resistance in one direction or in all directions is obtained, so the tightening force of the high-strength bolt is efficient. It can be used well, and the slip resistance does not vary as in the past, and the required slip resistance can be stably obtained.At the same time, in order to obtain friction, processing such as rust generation at the steel frame processing plant is possible. It is not necessary to do it, and the construction period can be greatly shortened, and on-site joining by high-strength bolt joining can be performed easily and reliably regardless of the type of structural material. In particular, the blade portion or the pyramid-shaped protrusion of the blade-shaped protrusion with a shoulder bites into the base material or the base material and the base plate to the base, and the plate-shaped body provided with the shoulder portion or the pyramid-shaped protrusion is the base material or the base material. Since the shoulder part presses the periphery of the blade part that has come into close contact with or diminishes the attachment plate etc., the joint surface of the base material or the attachment plate etc. is pressed as a compressive force while adding to the blade part etc. Since it is the total force with the lateral force that is applied, the shoulder part can further increase the slip resistance and stabilize the tightening force by reducing the change in bolt axial force during and after tightening the bolt. Moreover, since the blade portions such as the blade-shaped projections with shoulder portions bite into the base material and the like, it is possible to prevent rusting of them.

[Brief description of drawings]

FIG. 1 is a plan view showing a first embodiment of a joining auxiliary member for a high-strength bolt joining portion of the present invention.

FIG. 2 is a half cross-sectional side view of the joining assisting member of FIG.

FIG. 3 is a side view of a high-strength bolt joint using the joining auxiliary member of FIG.

FIG. 4 is a cross-sectional view showing a main part of a high-strength bolt joint portion of FIG.

5 is an explanatory diagram showing the relationship between the axial force reduction rate of the high-strength bolt and the time at the high-strength bolt joint portion of FIG.

FIG. 6 is an explanatory diagram of a slip proof test result showing a relationship between a tensile load and a displacement amount in the high-strength bolt joint portion of FIG. 3.

FIG. 7 is a plan view showing a second embodiment of the joining assisting member for the high strength bolt joining portion of the present invention.

8 is a half sectional side view of the joining assisting member of FIG. 7. FIG.

FIG. 9 is a plan view showing a third embodiment of the joining auxiliary member for the high strength bolt joining portion of the present invention.

FIG. 10 is a plan view showing a fourth embodiment of the joining auxiliary member for the high strength bolt joining portion of the present invention.

FIG. 11 is a plan view showing a fifth embodiment of the joining auxiliary member for the high strength bolt joining portion of the present invention.

12 is a half cross-sectional side view of the joining auxiliary member of FIG.

FIG. 13 is a plan view showing a sixth embodiment of the joining assisting member for the high strength bolt joining portion of the present invention.

14 is a half sectional side view of the joining assisting member of FIG.

FIG. 15 is a plan view showing a seventh embodiment of the joining auxiliary member for the high strength bolt joining portion of the present invention.

16 is a half cross-sectional side view of the joining auxiliary member of FIG.

FIG. 17 is a plan view showing an example of a joint metal fitting for a high-strength bolt joint of the present invention.

FIG. 18 is a half sectional side view of the joint fitting of FIG. 17.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Joining assisting member 2 Bolt hole 3 Plate-like body 4 Blade-like protrusion with shoulder part 4a Shoulder part 4b Blade part 5 Addition plate 8 Base material 10 High-strength bolt 11 Joining assisting member 12 Bolt hole 13 Plate-like body 14 Blade with shoulder part -Shaped protrusion 15 Joining auxiliary member 16 Bolt hole 17 Plate-shaped body 18 Blade-shaped protrusion with shoulder 19 Bonding-assisting member 20 Bolt hole 21 Plate-shaped body 22 Blade-shaped protrusion with shoulder 23 Joint-assisting member 24 Plate-shaped body 25 Blade-shaped protrusion 26 joining auxiliary member 27 plate-like body 28 blade-like projection 29 joining auxiliary member 30 plate-like body 31 pyramidal projection 32 addition plate (joint metal fitting) 34 bolt hole 35 blade-like projection with shoulder part

Claims (3)

[Claims] 1. A joining auxiliary member, which is interposed between a base material and an addition plate or the like in a high-strength bolt joint, has strength and hardness equal to or higher than those of the base material and the addition plate, and has a center. Blades with a plurality of parallel shoulders having a straight line on at least one surface of a plate-like body having a bolt hole in its portion and having a size within the range of being influenced by the tightening force of one high-strength bolt A joining auxiliary member for a high-strength bolted joint, characterized in that a blade-shaped projection with a shoulder is formed in the shape of a projection, or in the shape of a ring, a spiral, a radial shape, a lattice shape, or a combination thereof. 2. A joining auxiliary member which is interposed between a base material and an addition plate or the like in a high-strength bolt joint, and which has strength and hardness equal to or higher than those of the base material and the addition plate and 1 At least one side of the ring-shaped, spiral-shaped, radial-shaped, grid-shaped, or a combination of these, which is within the range affected by the tightening force of the high-strength bolt of the book, is appropriately narrower than the width of the plate-shaped body A joining auxiliary member for high-strength bolt joints, characterized in that a plurality of pyramidal protrusions each having one side appropriately smaller than the width of the blade-like protrusion or the plate-like member are formed. 3. A joint metal fitting, such as an add-on plate, which is joined to a base material in a high-strength bolt joint, and which has strength and hardness equal to or higher than that of the base material, and which is a joint surface joined to the base material. Along the range of the influence of the tightening force of a single high-strength bolt around the hole, a plurality of straight parallel blade edge projections with shoulders, or a ring shape, a spiral shape, a radial shape or these A joint metal fitting for a high-strength bolt joint, characterized in that a blade-shaped projection with a shoulder portion having a combined shape is formed.