JP6652425B2 - Plate-shaped joining structure - Google Patents

Description

  The present invention relates to a joining structure of plate members, and more particularly, to a joining structure of plate members that is effective at a joint portion of a steel frame.

Conventionally, when a steel frame is formed by assembling iron materials or steel materials, joining using high-strength bolts that can be tightened and fixed with high axial force is performed so that the joint portion does not come off or loosen. (For example, see Patent Document 1).
Furthermore, in the case where tightening with a high axial force cannot be performed, a method has been proposed in which, in order to surely prevent the bolt from being loosened, the nuts are stacked in two stages and jointly fastened with a middle bolt (for example, Non-Patent Document 1).

  However, if the joints (joint parts) of the steel frame are fastened with high-strength bolts, the joints will become structurally susceptible when the structure receives external force such as vibration, or when the structure expands or contracts due to temperature. It is not possible to follow the movement of the body, and a large stress is applied to parts such as the plate-like member and the bolts at the joint part, which may damage the structure and the parts constituting the joint part.

  In this regard, in the case where a thermal expansion occurs in a structure due to a fire, a nut is coupled to a high-strength bolt via a washer as a configuration that enables movement of a plate-shaped member at a joint portion in response to the thermal expansion. When the structures are connected to each other by tightening, in the event of a fire, the heat is used to melt some or all of the washer, allowing the bolts to move in the long holes, and absorbing the thermal expansion of the structure A configuration is disclosed (for example, see Patent Document 2).

JP-A-2005-034397 JP-A-11-082465

Hard Lock Industry Co., Ltd. "What is Hard Lock Nut" http://www.hardlock.co.jp/hl/index.php

However, the scene where it is necessary to move the joint portion (joint portion) of the steel frame is not limited to a case where a large temperature change occurs such as in a fire.
Rather, in response to the expansion and contraction of the structure due to daily temperature changes, vibration of the structure due to wind, earthquake, etc., avoid damage to the structure itself and the parts that make up its joints as much as possible, In some cases, a configuration that does not require large-scale repair or replacement of parts is desired.

  On the other hand, at the joint (joint) of the steel frame, it is necessary to reliably prevent the joint from coming off or being damaged due to the loosening of the bolts and nuts. It is necessary to perform appropriate fastening that satisfies the two requirements of the ability to follow the movement of the structure due to contraction or the like.

Although the high-strength bolts are specified in terms of the torque coefficient value of the tightening torque and the like according to JIS standards and the like, medium bolts are generally used at the joints. When medium bolts are used (double nuts), specific fastening methods (torque parameters, etc.) and construction management methods as in high-strength bolts are not determined.
For this reason, when trying to satisfy the two demands of preventing loosening and following the movement of the structure due to vibration, temperature shrinkage, etc., the bolts become too loose and the strength of the joint decreases, or conversely, Overtightening may hinder the movement of the plate-shaped member at the joint, and may cause deformation and the like, and thus it is difficult to perform appropriate construction management.

  The present invention has been made in view of the above circumstances, and at the joint portion (joint portion) of a steel frame, it is possible to prevent loosening of the joint and follow the movement of the structure due to vibration, temperature shrinkage, etc. It is an object of the present invention to provide a joining structure of a plate-like member that can ensure the above.

In order to solve the above problems, the joining structure of the plate-shaped member according to the invention of the present application is:
It is a joining structure of a plate-like member that overlaps and joins the plate-like members,
A high-strength bolt unit that has a high-strength bolt and a nut and joins the plate members,
An intermediate material that is formed to be thicker than the thickness of the overlapping portion of the plate-like member and that can form a through-hole that penetrates the plate-like member in the thickness direction thereof,
With
A slot-shaped bolt insertion hole is formed in the overlapping portion of the plate-like member,
The intermediate member is disposed in the bolt insertion hole,
The high-strength bolt is configured to be inserted into the through hole formed by the intermediate member disposed in the bolt insertion hole, and screwed to the nut with the intermediate member interposed. is there.

  With this configuration, the intermediate member functions as a spacer, and the high tightening force of the high-strength bolt is not transmitted to the plate-shaped member. Dynamic movement is ensured, and the movement of the structure can be absorbed to prevent deformation and the like.

Here, preferably, the intermediate member has a corner for restricting free rotation in the bolt insertion hole.
Preferably, the intermediate member comprises a hexagon nut.
With such a configuration, a commercially available hexagon nut can be used as an intermediate material. Then, at the time of fastening the high-strength bolt, any one of the six corners abuts on the inner surface of the bolt insertion hole, so that the free rotation of the intermediate member can be restricted.

Still preferably, the intermediate member includes a plurality of intermediate member structures that are opposed to each other to form the through hole.
With this configuration, the relative movement of the plate member at the joint portion is ensured even after the high-strength bolt and nut are tightened without increasing the width of the bolt insertion hole, and the movement of the structure To prevent deformation and the like. Therefore, when applied to a joint between steel plates in an existing structure, there is no need to perform a cutting process to increase the width of the bolt insertion hole at a site where the structure to be installed is present, thereby shortening the working time. be able to.

Further, preferably, the high-strength bolt unit is provided between the washer and the washer or the high-strength bolt and the intermediate member structure, the washer being joined to the intermediate member disposed in the bolt insertion hole. Movement suppressing means capable of suppressing movement of the intermediate member in the separating direction is provided.
Thereby, it is possible to prevent the intermediate member constituting body disposed in the bolt insertion hole from falling out of the bolt insertion hole due to vibration or the like.

Further, the high-strength bolt unit is provided with means for fastening the plurality of intermediate member structures together.
Further, the high-strength bolt unit includes a washer that is joined to the intermediate member disposed in the bolt insertion hole, and the washer or the intermediate member structure includes a plurality of the plurality of bolts disposed in the bolt insertion hole. Means may be provided for preventing the intermediate members from moving in a direction away from the outer periphery of the high-strength bolt unit.
According to the above-described configuration, it is possible to prevent the intermediate member structure disposed in the bolt insertion hole from falling out of the bolt insertion hole due to vibration or the like.

According to the present invention, the bolt of the high-strength bolt unit is screwed into the nut via the intermediate member formed to be thicker than the thickness of the overlapping portion of the plate-like member.
For this reason, the intermediate material functions as a spacer, and a gap is secured between the surface of the plate-like member and the high-strength bolt or nut even when the nut is strongly tightened to the high-strength bolt, and the high-strength bolt is directly attached to the plate-like member. Is not transmitted.
Thereby, it is possible to achieve both prevention of loosening of the joint portion and securing of followability to the movement of the structure due to vibration, temperature shrinkage, and the like.
In other words, even if the structure moves due to vibration or temperature change and a strong force is applied to the plate member at the joint portion, even after tightening with a high axial force to prevent the joint portion from loosening, It is possible to move relative to each other along the extending direction of the bolt insertion hole, which is a long hole, and the joint portion moves smoothly, so that an excessive force is applied to the joint portion and the component of the joint portion It is possible to prevent the structure from being broken or the structure from being deformed or damaged.

In addition, when the intermediate member is provided with a corner portion for restricting free rotation in the bolt insertion hole, even when a nut is used as the intermediate member, it is possible to prevent rotation when fastening the high-strength bolt and smoothly increase the height. The work of tightening the force bolt can be performed.
In particular, when the intermediate material is a hexagon nut, a commercially available product can be used, which is convenient.

It is a top view which shows the joining structure of the plate-shaped member which concerns on this embodiment. It is a side view of the joining structure of the plate-shaped member shown in FIG. FIG. 3 is an enlarged view of a part III surrounded by a dashed line in FIG. 1. FIG. 4 is an enlarged view of a portion IV surrounded by a dashed line in FIG. 2. It is a top view which shows an example of the joining structure of the conventional plate-shaped member. It is a side view of the joining structure of the plate-shaped member shown in FIG. FIG. 7 is an enlarged view of a portion VII surrounded by a dashed line in FIG. 5. FIG. 7 is an enlarged view of a portion VIII surrounded by a dashed line in FIG. 6. (A) is a perspective view showing an example of a windbreak wall to which a conventional joining structure of plate-like members is applied, and (b) is an enlarged view of a portion b surrounded by a dashed line in (a). FIGS. 4A and 4B show a first specific example of an intermediate material in the second embodiment, in which FIG. 4A is a top view and FIG. FIGS. 6A and 6B show a second specific example of the intermediate member according to the second embodiment, in which FIG. 6A is a top view and FIG. It is a top view showing the 3rd example of an intermediate material in a 2nd embodiment. FIG. 7A is a top view showing a modification of the second embodiment, in which FIG. 7A is a top view showing an engagement state between a washer and an intermediate member, and FIG. It is a sectional side view showing other modifications of a 2nd embodiment.

One embodiment of a plate-shaped member joining structure according to the present invention will be described with reference to FIGS. 1 to 9A and 9B.
As described below, the joining structure of the plate members in the present embodiment is a joining structure of the plate members in which the plate members 1 and 2 (see FIG. 1 and the like) are overlapped and joined. 1 and 2 are relatively movably joined to each other. The joint structure of the plate-like members 1 and 2 of the present embodiment is assumed to be used in an expansion joint which is a joint for dividing structures having different properties so as not to transmit a force. You.

Specifically, first, there is a case where the joint structure of the present embodiment is used for a joint portion between structures in order to prevent a large stress from being generated in the structure due to vibration due to an earthquake or the like. Application to a building that straddles an expansion joint such as a structure can be considered.
For example, a junction between the passenger villa and the overpass, a junction between the roof and the stairs, a junction between the station building and the roof, and the like can be given.
The second is a case where the joint structure of the present embodiment is used for a joint portion between structures in order to prevent a large stress from being generated in the structure due to thermal expansion or contraction. When a building is divided into a plurality of structures, it is conceivable to apply the structure to a joint connecting the structures.
More specifically, joining of structures in a windbreak wall formed by connecting a plurality of panels (structures), a passenger house constructed of a plurality of structures, a repair room, a large space building, and the like. And the like.
In either case, the load in the vertical direction (vertical direction in FIG. 2) is borne at the joint portion, but the horizontal force (horizontal direction, that is, the lateral force in FIG. 2) is not borne, and the plate-like members 1 and 2 are not borne. By enabling relative movement in the horizontal direction, the structure is configured to absorb the movement of the structure and prevent a large stress from being generated in the structure.
Hereinafter, a specific configuration of the joining structure of the plate-shaped members in the present embodiment will be described in detail.

  FIG. 1 is a top view showing a joint structure of the plate members according to the present embodiment, and FIG. 2 is a side view of the joint structure of the plate members. FIG. 3 is an enlarged view of a portion III surrounded by a dashed line in FIG. 1, and FIG. 4 is an enlarged view of a portion IV surrounded by a dashed line in FIG.

The joining structure of the plate-like members is provided at a joining portion when the plate-like members 1 and 2 are overlapped and joined. Here, the plate-like members 1 and 2 are, for example, joint plates that are provided at one end of a structure (not shown) to be joined and constitute a joint between the structures.
As shown in FIGS. 1 to 4, two elongated bolt insertion holes 11 and 21 are formed in the overlapping portion of the plate members 1 and 2 in parallel in the longitudinal direction.
As will be described later, in the present embodiment, since the shaft portion 31 of the high-strength bolt 3 is configured to be movable in the bolt insertion holes 11 and 21, the plate-like members 1 and 2 are relatively movable. The length of the bolt insertion holes 11 and 21 in the longitudinal direction is determined by how much the plate-like members 1 and 2 can move, that is, how much the movable range at the joint portion is. It is set appropriately depending on the situation.
Further, in the present embodiment, as described later, since the intermediate member 6 having the same outer diameter as the outer diameter of the nut 4 configuring the high-strength bolt unit 30 is arranged in the bolt insertion holes 11 and 21, The length of the bolt insertion holes 11 and 21 in the short direction orthogonal to the longitudinal direction is formed larger than the outer diameter of the intermediate member 6.
In the following embodiment, an example is shown in which an elongated hole is provided at a position corresponding to both of the plate members 1 and 2, but an elongated hole is provided in only one of the plate members 1 and 2, and the other is provided. The plate members 1 and 2 may be provided with round holes.

The joining structure of the plate-like members includes a high-strength bolt unit 30 for joining the plate-like members 1 and 2, and the intermediate member 6 arranged in the bolt insertion holes 11 and 21.
One high-strength bolt unit 30 and one intermediate member 6 are provided for each of the two bolt insertion holes 11 and 21. Since the configuration of the bolt insertion holes 11 and 21 and the high-strength bolt unit 30 and the intermediate member 6 provided for each of the bolt insertion holes 11 and 21 are the same, one bolt insertion hole 11 will be described below. , 21 and the high-strength bolt unit 30 and intermediate member 6 provided therein will be described.

The high-strength bolt unit 30 includes a high-strength bolt 3 and a nut 4.
The high-strength bolt 3 is a high-strength bolt made of steel that can withstand a high tensile force, and has a shaft portion 31 having a male thread and a screw head 32.
The nut 4 has a female screw that is screwed with the male screw of the high-strength bolt 3. In the present embodiment, the nut 4 is a hexagonal nut having a hexagonal shape in a top view.

In the present embodiment, between the screw head 32 of the high-strength bolt 3 and one of the plate-like members 1 and 2 (in the present embodiment, the plate-like member 1 arranged on the upper side in FIGS. 2 and 4). A washer 5 (5a, 5b) is disposed between the nut 4 and the other plate-like member 1, 2 (in the present embodiment, the plate-like member 2 disposed on the lower side in FIGS. 2 and 4). I have.
The washer 5 (5a, 5b) may have any shape such as an elliptical shape, a square shape, etc., in addition to the circular shape shown in the present embodiment.
The size of the washer 5 (5a, 5b) needs to be such that the washer 5 (5a, 5b) does not enter the bolt insertion hole 11, 21 of the plate member 1, 2. The holes 11 and 21 are formed so as to have an outer diameter larger than the width in the short direction.
In this embodiment, one washer 5 (5a, 5b) is arranged between the screw head 32 of the high-strength bolt 3 and the plate-like member 1 and between the nut 4 and the plate-like member 2 respectively. Although the case has been exemplified, the number and arrangement of the washers 5 (5a, 5b) are not limited thereto. For example, a plurality of washers 5 may be arranged between the screw head 32 of the high-strength bolt 3 and the plate member 1 and between the nut 4 and the plate member 2. When a plurality of washers 5 are provided, these washers 5 may be integrated.

The intermediate member 6 is a ring-shaped member having a through hole 61 penetrating in the thickness direction of the plate-like members 1 and 2 at a substantially central portion in the plane direction.
The shape and the like of the intermediate member 6 are not particularly limited, but in the present embodiment, a hexagonal nut formed in the same hexagonal shape as the nut 4 of the high-strength bolt unit 30 is used as the intermediate member 6.
When the intermediate member 6 is a nut as described above, if the intermediate member 6 is freely rotated in the bolt insertion holes 11 and 21, it is difficult to work with the shaft portion 31 of the high-strength bolt 3 when tightening the high-strength bolt 3. For this reason, it is preferable that the intermediate member 6 be provided with a corner portion 62 that regulates free rotation in the bolt insertion holes 11 and 21.
In the present embodiment, the intermediate member 6 is formed so that the shape in a top view becomes a hexagonal shape as described above, and six corner portions 62 are provided in the intermediate member 6. Thus, even when the intermediate member 6 tries to rotate when the high-strength bolt 3 is tightened, one of the corners 62 abuts against the inner side surface of the bolt insertion hole 11, 21, and the intermediate member 6 in the bolt insertion hole 11, 21 is formed. 6 is restricted.

As shown in FIG. 4 and the like, the intermediate member 6 is formed to be thicker than the thickness of the overlapped portion of the two plate-like members 1 and 2, and the high-strength bolt 3 of the high-strength bolt unit 30 is used for the washer 5 (5a, 5a). When tightened to the nut 4 via 5b), a slight gap is formed between the washer 5 (5a, 5b) and the plate-like members 1, 2.
The material forming the intermediate member 6 is not particularly limited, but the intermediate member 6 needs to be able to withstand strong tightening by the high-strength bolt unit 30 and is formed of a steel material or the like having a high strength. Is preferred.

Next, the operation of the joining structure of the plate-like members in the present embodiment will be described.
When joining the plate-like members 1 and 2 such as a joint plate of a steel frame by the joining structure of the present embodiment, first, the plate-like members 1 and 2 such as the joint plate of the structure to be joined are bolted together. The insertion holes 11 and 21 are superimposed on each other so that their positions are substantially overlapped.
The intermediate member 6 is arranged in the bolt insertion holes 11 and 21, and the intermediate member 6 is sandwiched from above and below between the screw head 32 of the high-strength bolt 3 and the plate member 1 and between the nut 4 and the plate member. Washers 5 (5a, 5b) are arranged between the members 2 respectively.
Furthermore, the back side of the washer 5b on the back side (in this embodiment, the lower side in FIGS. 2 and 4) in the insertion direction of the high-strength bolt 3 (the direction from the top to the bottom in FIGS. 2 and 4 in this embodiment). The nut 4 is disposed on the lower side in FIGS. 2 and 4 in this embodiment.

Then, as described above, with the washer 5 (5a, 5b) interposed above and below the intermediate member 6, the high-strength bolt 3 is inserted into the through-hole 61 of the intermediate member 6 arranged in the bolt insertion hole 11, 21. 2 and 4 are inserted from the top to the bottom, and tightened tightly with a high axial force. At this time, for example, it is preferable to perform primary tightening, final tightening, and double tightening. Thereby, the high-strength bolt 3 is screwed with the nut 4 via the intermediate member 6. When the high-strength bolt 3 is tightened, the intermediate member 6 can be easily rotated without rotating because the corners 62 of the intermediate member 6 abut against the inner surfaces of the bolt insertion holes 11 and 21 to restrict free rotation. Can be.
In the joining structure of the plate-shaped members in the present embodiment, even if the fastening is performed by the high axial force by the high-strength bolt 3, the axial fastening force is only applied to the intermediate member 6, and the plate-shaped members 1 and 2 themselves are not tightened. Has no clamping force. For this reason, after being tightened by the high-strength bolt 3, the movement of the plate-like members 1 and 2 in the short direction (vertical (vertical) direction in FIG. 2) of the bolt insertion holes 11 and 21 is restricted, but the bolt insertion holes are not fixed. In the longitudinal direction (the horizontal (horizontal) direction in FIG. 2) of the bolts 11 and 21, the bolts can relatively move within the length of the bolt insertion holes 11 and 21.

Here, a conventional joining structure of plate-like members will be described with reference to FIGS. 5 to 9A and 9B.
FIG. 5 is a top view showing an example of a conventional joining structure of plate members, and FIG. 6 is a side view of the joining structure of plate members shown in FIG. FIG. 7 is an enlarged view of a portion VII surrounded by a dashed line in FIG. 5, and FIG. 8 is an enlarged view of a portion VIII surrounded by a dashed line in FIG.

As shown in FIGS. 5 to 8, in the conventional joining structure, the plate-like members 1 and 2 are provided with bolt insertion holes 12 and 22 which are elongated holes wider than the diameter of the shaft of the bolt 7. In the conventional joint structure, the bolt insertion holes 12 and 22 only need to have a width that allows the shaft portion of the bolt 7 to be inserted, and the bolt insertion holes 11 and 22 in the joint structure of the present embodiment shown in FIG. A width smaller than 21 is sufficient.
When joining the plate-like members 1 and 2, first, the plate-like members 1 and 2 such as joint plates of the structure to be joined are aligned and overlapped so that the bolt insertion holes 12 and 22 substantially overlap.
Then, washers 9 (9a, 9b) are arranged above and below the plate members 1, 2, respectively.
In addition, the back side of the washer 9b (the lower side in FIGS. 6 and 8 in the present embodiment) in the insertion direction of the bolt 7 (the direction from the top to the lower side in FIGS. 6 and 8 in the present embodiment). In the embodiment, two nuts 8a and 8b are arranged on the lower side in FIGS. 6 and 8).
Then, with the washer 9 (9a, 9b) interposed above and below the plate-like members 1 and 2, the bolt 7 is inserted into the bolt insertion holes 12 and 22 from top to bottom in FIGS. To tighten.

In this manner, by stacking the nuts 8a and 8b in two stages, more reliable tightening can be expected, and the bolt 7 can be prevented from loosening.
On the other hand, when the bolts are tightened, the plate-like members 1 and 2 are sandwiched from above and below by the washers 9 (9a, 9b). For this reason, even if the bolt insertion holes 12 and 22 are elongated holes, the plate-like members 1 and 2 cannot move, and the structure constituting the steel frame is subjected to vibration due to an earthquake or the like, When expansion, contraction, or the like occurs, the movement of the structure cannot be absorbed at the joint, and a large stress is generated at the joint (joint) where the structures are joined. As a result, for example, there is a possibility that buckling or the like may occur in parts such as the plate-like members 1 and 2 at the joint (joint part).

For example, FIG. 9A is a perspective view showing an example of a windproof wall to which a conventional joining structure of plate members is applied, and FIG. 9B is a portion surrounded by a dashed line in FIG. 9A. It is an enlarged view of b.
As shown in FIGS. 9A and 9B, a long windproof wall 100 provided with a plurality of windproof panels 103 is divided into a plurality of structures, and a joint of a longitudinal steel frame 101 of one structure is formed. When joining and integrating the structures by joining the plate 104 and the lateral steel frame 102 of the adjacent structure to the plate 104, conventionally, the bolt 111 is inserted into the bolt insertion hole 105 via the washer 113, The two plate-shaped members (that is, the joint plate 104 of the vertical steel frame 101 and the horizontal steel frame 102 of the structure) are fastened by being screwed with the nut 112.

  In such a joint structure, when the bolt 111 is tightened by an appropriate tightening force to the extent that the joint portion (joint portion) can follow the deformation, the joint plate 104 of the longitudinal steel frame 101 and the joint plate 104 of the longitudinal steel frame 101 are not tightened. The steel frame 102 can slide relative to each other, and the force can be released. However, if the bolts 111 are excessively tightened, the structural plates may be subjected to vibrations such as strong winds or earthquakes, or may undergo thermal expansion or contraction due to temperature changes. The lateral steel frame 102 cannot move relative to each other, and the joints (joint parts) between the structures cannot follow the movements associated with vibration and expansion / contraction. For this reason, the bolt 111 and the bolt insertion hole 105 may be damaged, or the plate-shaped member itself such as the joint plate 104 may be deformed or damaged as shown in FIG. 9B.

In this regard, according to the joining structure of the plate-shaped members in the present embodiment, the intermediate member 6 formed to be thicker than the thickness of the overlapped portion of the plate-shaped members 1 and 2 is disposed in the bolt insertion holes 11 and 21 and the height is increased. When the fastening is performed by the force bolt 3, the high-strength bolt 3 and the nut 4 are configured to fasten the intermediate member 6 via the washer 5, so that the fastening force is not transmitted to the plate members 1 and 2 themselves.
For this reason, even if the high-strength bolt 3 is used to prevent the joint portion from being loosened and fastened by a high axial force using the high-strength bolt 3, regardless of the degree of tightening of the high-strength bolt 3 and the nut 4, The two members can move in the direction along the bolt insertion holes 11 and 21, and the deformation followability of a joint (joint portion) that joins the structures constituting the steel frame is secured.

As described above, according to the present embodiment, the high-strength bolt 3 is screwed to the nut 4 via the intermediate member 6 formed to be thicker than the overlapping portion of the plate members 1 and 2.
Therefore, the intermediate member 6 functions as a spacer, and a gap is secured between the surfaces of the plate-like members 1 and 2 and the high-strength bolt 3 or the nut 4 even when the nut 4 is strongly tightened to the high-strength bolt 3. .
Thereby, even if the structure moves due to vibration, temperature change, etc., and a strong force is applied to the plate-like members 1 and 2 of the joint portion even after tightening with a high axial force to prevent loosening of the joint portion. The plate-like members 1 and 2 can move relative to each other along the extending direction of the bolt insertion holes 11 and 21 which are long holes. It is possible to prevent the parts and the like at the joint portion from being destroyed or the structure from being deformed or damaged due to excessive force.
Further, since it is possible to tighten and fix to the limit of the tightening torque defined for the high-strength bolt 3 without worrying about securing the deformation followability of the joint portion (joint portion), loosening of the joint portion is reliably prevented. Therefore, it is possible to realize both the prevention of loosening and the securing of the deformation followability of the joint portion (joint portion).

Further, in the present embodiment, a nut is used as the intermediate member 6. However, even when the nut is used as the intermediate member, the corner portion 62 restricts the free rotation of the intermediate member 6. At the time of fastening, the rotation of the intermediate member 6 is prevented, so that the high-strength bolt 3 can be smoothly tightened.
In particular, in the present embodiment, since a hexagon nut is used as the intermediate member 6, when the high-strength bolt 3 is fastened, one of the six corners abuts on the inner surface of the bolt insertion hole 11, 21 to restrict free rotation. Can be.
Moreover, since a commercially available hexagon nut can be used, the cost can be reduced.

  Although the embodiment of the present invention has been described above, the present invention is not limited to the embodiment, and it goes without saying that various modifications can be made without departing from the spirit of the present invention.

For example, in the present embodiment, the case where the intermediate member 6 is a hexagonal nut having a hexagonal shape in a top view is illustrated, but the intermediate member 6 is provided with the intermediate member 6 when the high-strength bolt 3 is tightened. The shape may be any shape that does not rotate, and is not limited to a hexagonal shape.
For example, the intermediate member 6 may be a quadrangle having four corners, or may be a polygon having more corners than a hexagon.
Further, even when the intermediate member 6 has a circular shape in a top view, it is possible to provide a protrusion, a flange, or the like, which abuts against the inner surface of the bolt insertion hole 11, 21 at a part of the circular peripheral portion. The rotation of the intermediate member 6 may be prevented. Further, the intermediate member 6 may be configured so that the intermediate member 6 does not rotate when the top view is an elliptical shape whose major axis is longer than the length of the bolt insertion holes 11 and 21 in the short direction.

Further, in the present embodiment, the case where the intermediate member 6 and the washer 5 (5a, 5b) are provided as separate members has been illustrated, but the intermediate member 6 is not limited to such a single member.
For example, the intermediate member 6 may be integrated with the washer 5b. In this case, the number of parts can be reduced, and the fastening operation by the high-strength bolt unit 30 can be speeded up and the efficiency can be improved.

Further, in the present embodiment, the case where the intermediate member 6 is a nut is illustrated, but the intermediate member 6 is not limited to the case where the intermediate member 6 is a nut.
For example, the intermediate member 6 may be a circular spacer having a through hole formed at a substantially central portion in the surface direction.

Further, in the present embodiment (first embodiment), a case where two long slot-shaped bolt insertion holes 11 and 21 are formed in a superposed portion of the plate-like members 1 and 2 in parallel in the longitudinal direction. Although illustrated, the number of the bolt insertion holes 11 and 21 is not limited to this.
For example, three or more bolt insertion holes 11 and 21 may be formed in the overlapping portion of the plate members 1 and 2, or only one bolt insertion hole 11 and 21 may be formed.

Next, a second embodiment of the present invention will be described.
In the first embodiment, the width of the intermediate member 6 inserted into the bolt insertion holes (loose holes) 11 and 21 formed in the two plate members 1 and 2 joined to each other is as follows. Since it is larger than the diameter of the screw portion of the high-strength bolt 3 for fastening, if it is to be applied to a joint portion between steel plate plates in an existing structure, the width of the bolt insertion holes 11 and 21 at the site where the structure exists. It is necessary to perform a cutting process to increase the size. Therefore, there is a problem that the working time becomes longer and it is necessary to change to a washer having a larger diameter than the original washer.

Further, in the first embodiment, by performing the processing to increase the width of the bolt insertion holes 11 and 21, the cross-sectional area of the plate is reduced and the strength is reduced. In addition, when a new joining structure is provided, it is necessary to form the two plates in advance in order to avoid a decrease in strength, and there is also a problem that the weight and cost increase.
In the second embodiment, a device for solving the problems of the first embodiment as described above is applied to the intermediate member 6 and its peripheral parts. Hereinafter, some specific examples will be described.

  In a first specific example of the second embodiment, as shown in FIGS. 10A and 10B, the intermediate member 6 is divided into two parts, and a crescent-shaped intermediate member structures 6A and 6B are formed. When the intermediate members 6A and 6B are arranged to face each other, a circular insertion hole H slightly larger than the diameter of the screw portion of the high-strength bolt 3 is formed at the center. Has become. As in the case of the intermediate member 6 in the first embodiment, the height of the intermediate member structures 6A and 6B is set to be slightly larger than the thickness of the two plate members to be joined to each other.

  Accordingly, even when the high-strength bolt 3 is tightened, the two plate-like members can move in a direction in which they are displaced from each other. In addition, it is possible to prevent the components constituting the structure and the joint portion from being damaged. In addition, when the present invention is applied to a joint portion of an existing structure, it is not necessary to perform a process of increasing the width of the bolt insertion holes 11 and 21, and the working time can be reduced. Further, since there is no need to increase the width, an original washer or a washer having the same size as the original can be used, and there is an advantage that it is not necessary to prepare a large washer.

By the way, the intermediate material in the first specific example is composed of two intermediate material components separated from each other, so that handling is troublesome, and the intermediate material component falls out from the bolt insertion holes 11 and 12 after being attached, and then falls. There is a possibility that it will.
In the second specific example, in order to avoid such a problem, as shown in FIGS. 11 (a) and 11 (b), a gap between the intermediate member constructs 6A and 6B and a washer 17 joined to one surface of the intermediate constructs 6A and 6B. For example, the intermediate material structures 6A and 6B and the washer 17 are bonded to each other with a double-sided tape 8 interposed therebetween.

This has the same advantages as the first specific example, and also has the advantage that it is possible to prevent a problem that the intermediate member structure comes off from the inside of the bolt insertion holes 11 and 12 after the attachment, thereby preventing the problem. is there.
As described above, instead of bonding the intermediate members 6A and 6B and the washer 17 with the double-sided tape 8, the outer periphery of the screw portion of the high-strength bolt 3 and the inner periphery of the intermediate members 6A and 6B are double-sided. You may make it adhere using a tape or an adhesive.

  In the third specific example, as shown in FIG. 12, a thin hinge 6C is provided across the side surfaces of the intermediate material structures 6A and 6B so that the intermediate material structures 6A and 6B can be opened and closed. By adopting such a configuration, the intermediate member structures 6A and 6B are integrated to facilitate handling, and are prevented from dropping out of the intermediate member member bolt insertion holes 11 and 21 after being attached. Can be. The hinge 6C may be formed of any material such as a metal or a synthetic resin as long as it is a sheet or a thin plate, and both ends are fixed to the side surfaces of the intermediate member structures 6A and 6B with screws or the like. May be used, or may be simply bonded with an adhesive. Also, a small hinge may be used.

Further, as shown in FIGS. 13 (a) and 13 (b), locking pieces 17a and 17b are formed on the outer edge of the washer 17 so as to be able to contact the outer surfaces of the intermediate material structures 6A and 6B. The pieces 17a and 17b may be configured to prevent the intermediate material structures 6A and 6B from moving in directions away from each other.
Further, as shown in FIG. 14, protrusions 6a and 6b are provided on the inner edges of the end surfaces of the intermediate member structures 6A and 6B to enter the gap between the opening of the washer 17 and the outer peripheral surface of the high-strength bolt 3. It may be.

DESCRIPTION OF SYMBOLS 1 Plate-shaped member 2 Plate-shaped member 3 High-strength bolt 4 Nut 5 Washer 6 Intermediate material 6A, 6B Intermediate material structure 17 Washer 11 Bolt insertion hole 21 Bolt insertion hole 31 Shaft 32 Screw head 61 Through-hole 62 Corner

Claims (7)

It is a joining structure of a plate-like member that overlaps and joins the plate-like members,
A high-strength bolt unit that has a high-strength bolt and a nut and joins the plate members,
An intermediate material that is formed to be thicker than the thickness of the overlapping portion of the plate-like member and that can form a through-hole that penetrates the plate-like member in the thickness direction thereof,
With
A slot-shaped bolt insertion hole is formed in the overlapping portion of the plate-like member,
The intermediate member is disposed in the bolt insertion hole,
The high-strength bolt is inserted into the through-hole formed by the intermediate member disposed in the bolt insertion hole, and screwed to the nut with the intermediate member interposed therebetween .
The joining structure of a plate-shaped member, wherein the intermediate member has a corner for restricting free rotation in the bolt insertion hole . The joint structure for a plate-like member according to claim 1 , wherein the intermediate member is a hexagon nut. It is a joining structure of a plate-like member that overlaps and joins the plate-like members,
A high-strength bolt unit that has a high-strength bolt and a nut and joins the plate members,
An intermediate material that is formed to be thicker than the thickness of the overlapping portion of the plate-like member and that can form a through-hole that penetrates the plate-like member in the thickness direction thereof,
With
A slot-shaped bolt insertion hole is formed in the overlapping portion of the plate-like member,
The intermediate member is disposed in the bolt insertion hole,
The high-strength bolt is inserted into the through-hole formed by the intermediate member disposed in the bolt insertion hole, and screwed to the nut with the intermediate member interposed therebetween.
The intermediate material is bonded structure characteristics as to that plate member that has a plurality of intermediate material structure for forming the through hole by being opposed. The high-strength bolt unit is provided between the washer or the high-strength bolt and the intermediate material structure, and a washer joined to the intermediate material disposed in the bolt insertion hole. 4. The joint structure for a plate-like member according to claim 3 , further comprising: movement suppressing means capable of suppressing movement of the plate member in the separating direction. The joint structure for a plate-like member according to claim 3 , wherein the high-strength bolt unit includes a unit that ties the plurality of intermediate member structures together. The high-strength bolt unit includes a washer that is joined to the intermediate member disposed in the bolt insertion hole, and the washer or the intermediate member structure includes a plurality of the plurality of the plurality of bolts disposed in the bolt insertion hole. The joint structure for a plate-like member according to claim 3 , further comprising means for preventing the intermediate member structure from moving away from the outer periphery of the high-strength bolt unit. It is a joining structure of a plate-like member that overlaps and joins the plate-like members,
A high-strength bolt unit that has a high-strength bolt and a nut and joins the plate members,
An intermediate material that is formed to be thicker than the thickness of the overlapping portion of the plate-like member and that can form a through-hole that penetrates the plate-like member in the thickness direction thereof,
With
A slot-shaped bolt insertion hole is formed in the overlapping portion of the plate-like member,
The intermediate member is disposed in the bolt insertion hole,
The high-strength bolt is inserted into the through-hole formed by the intermediate member disposed in the bolt insertion hole, and screwed to the nut with the intermediate member interposed therebetween.
A plate-shaped member, wherein the intermediate member is integrally formed including a plurality of intermediate member forming portions that are disposed to face each other to form the through hole, and a connecting portion that connects the intermediate member forming portions. Joint structure.

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