JP2021042827A - Pressure contact method - Google Patents

Abstract

To provide a pressure contact method capable of easily applying a pressure contact force to a plurality of plate materials which are stacked in a surface outer direction.SOLUTION: The present invention relates to a pressure contact method of putting a plurality of plate materials on over another and tightening a nut threadedly engaged with a bolt penetrating the plurality of plate materials in a surface outer direction to bring the plate materials into pressure contact. The bolt has a shaft body part having a threaded shaft part, a head part provided at one end of the shaft body part and arranged on one side in the surface outer direction of the plurality of plate materials, and a tip shaft part provided at the other end and arranged on the other side in the surface outer direction of the plurality of plate materials, and the nut is threadedly engaged with the threaded shaft part and provided with a disk spring one of between the plurality of plate materials and the head part and between the plurality of plate materials and the nut, the nut being tightened until the disk spring is compressed by a predetermined quantity by being rotated to threadedly move forward with the tip shaft part gripped to serve as a reaction force receiver.SELECTED DRAWING: Figure 4

Description

The present invention relates to a pressure welding method in which a plurality of plate members are pressure-welded in the out-of-plane direction.

Conventionally, a plurality of plate materials are pressure-welded in the out-of-plane direction. For example, an H-shaped steel flange constituting a sliding plate and a supplementary plate constituting a friction plate are slidably overlapped and penetrated together with a disc spring. A friction damper is known in which a disc spring is flexed and deformed by screwing a nut into a bolt to press the flange and the attached plate (see, for example, Patent Document 1). In this friction damper, the flange and the auxiliary plate are pressed against each other by the axial force acting by tightening the nut and compressing the disc spring.

Japanese Unexamined Patent Publication No. 11-269984

When tightening a nut to compress a disc spring in order to press-contact the flange and the auxiliary plate with the conventional friction damper, for example, to a surrounding part such as an adjacent bolt or H-shaped steel. , Shear runners, etc. must be hooked to take the reaction force. At this time, if an attempt is made to rotate the nut with a large force that compresses the disc spring, there is a risk of damaging the portion where the claw is caught. Therefore, for example, it is possible to use a tool such as a spanner with a long arm to turn the nut without taking a reaction force from the surrounding part, but it requires a lot of labor and time, and the workability is poor. There is a problem.

The present invention has been made in view of such circumstances, and an object of the present invention is to provide a pressure welding method capable of easily applying a pressure welding force to a plurality of plate materials stacked in the out-of-plane direction. ..

In order to achieve such an object, the pressure welding method of the present invention is used.
This is a pressure welding method in which a plurality of plate materials are superposed in the out-of-plane direction, and a nut screwed into a bolt penetrating the plurality of plate materials in the out-of-plane direction is tightened and pressure-welded.
The bolt is provided at one end of a shaft main body portion having a threaded shaft portion arranged along the out-of-plane direction and one end of the shaft main body portion, and is arranged on one side of the plurality of plate members in the out-of-plane direction. It has a head portion to be formed and a tip shaft portion provided at the other end and arranged on the other side of the plurality of plate members in the out-of-plane direction.
The nut is screwed onto the thread shaft portion on the other side of the plurality of plate members.
A disc spring is provided between the plurality of plates and the head, or between the plurality of plates and the nut.
The pressure welding method is characterized in that the nut is rotationally screwed while gripping the tip shaft portion and receiving a reaction force, and the nut is tightened until the disc spring is compressed by a predetermined amount.

According to such a pressure welding method, the nut is tightened by rotating and screwing the nut while grasping the tip shaft portion of the bolt and using it as a reaction force receiver, so that the rotation of the bolt is restricted or the surrounding members are used. There is no need to use as a reaction force. Further, since the tip shaft portion protrudes on the side opposite to the screwing direction of the nut, the nut can be easily tightened while gripping the tip shaft portion from one side. Therefore, it is possible to provide a pressure welding method capable of easily applying a pressure welding force to a plurality of stacked plate materials.

This is the pressure welding method
The bolt is characterized by having a strength that does not cause shear failure before the nut is tightened until the disc spring is compressed by the predetermined amount.

According to such a pressure welding method, the bolt does not undergo shear fracture before the nut is tightened until the disc spring is compressed by a predetermined amount, so that a desired pressure welding force can be more reliably applied to the disc spring. Is. For example, even a Torsia bolt known to be used by breaking the pin tail can be used by completing the tightening of the nut before the pin tail is broken.

This is the pressure welding method
The predetermined amount of compression of the disc spring is confirmed by the amount of deflection of the disc spring.

According to such a pressure contact method, a predetermined amount of compression of the disc spring is confirmed by the amount of deflection of the disc spring, so that a more accurate pressure contact force can be easily applied.

According to the present invention, it is possible to provide a pressure contact method capable of easily applying a pressure contact force to a plurality of plate materials stacked in the out-of-plane direction.

It is explanatory drawing about the outline of a friction damper. It is a side view which shows the structure of the friction damper of this embodiment. FIG. 2 is a cross-sectional view taken along the line AA in FIG. FIG. 2 is a cross-sectional view taken along the line BB in FIG.

Hereinafter, the pressure welding method of the present invention will be described with reference to the drawings.
In the present embodiment, a friction damper in which a plurality of plate materials are pressure-welded by the pressure-welding method of the present invention will be described as an example. The friction damper 1 of the present embodiment is incorporated in the brace 3 of the column-beam frame 2 as shown in FIG. 1, for example.

The brace 3 is divided at a predetermined position in the longitudinal direction thereof, and is joined while forming a friction damper 1 by using the divided end portion. The brace 3 is made of H-shaped steel 30, and as shown in FIGS. 2 and 3, friction dampers 1 are incorporated in the flange portion 31 and the web portion 32 of the H-shaped steel 30, respectively.

In the following description, a friction damper 1 provided so as to connect the flange portions 31 of the divided H-shaped steel 30 will be described as an example. Further, although the H-shaped steel 30 forming the brace 3 is arranged diagonally, in the following description, the plane of the flange portion 31 is arranged horizontally, and the direction in which the flange portion 31 faces is the vertical direction. The longitudinal direction and the left-right direction of the H-shaped steel 30 will be described. Further, in each flange portion 31, the side between the flange portions 31 facing each other in the vertical direction will be described as the inside, and the opposite side will be described as the outside.

In the H-shaped steel 30 formed of the brace 3 and divided, one of the flange portions 31 (hereinafter referred to as the first flange portion) 31a of the flange portions 31 arranged at intervals in the left-right direction has the first flange portion. Two splice plates 4 arranged so as to face each other above and below the flange portion 31a are fixed so as not to be movable by screwing a nut 6 into a bolt 5 penetrating in the out-of-plane direction.

Two splice plates 4 fixed to the first flange portion 31a are attached to the other flange portion (hereinafter referred to as the second flange portion) 31b which is arranged at a distance from the first flange portion 31a in the left-right direction. , The second flange portion 31b is arranged so as to sandwich it in the out-of-plane direction. Here, in the present embodiment, at least two splice plates 4 and the second flange portion 31b correspond to a plurality of plate materials overlapped in the out-of-plane direction.

As shown in FIG. 4, a sliding plate 7 is immovably fixed to each of the surfaces of the second flange portion 31b on the splice plate 4 side. Further, on the surface of each splice plate 4 on the side of the second flange portion 31b, a friction plate 8 integrally with the steel plate is fixed so as to face the sliding plate 7 so as not to move. Here, the friction plate 8 is, for example, an organic friction material or an inorganic friction material, and the sliding plate 7 is formed of a corrosion-resistant material such as stainless steel or titanium.

The torsia bolt 9 penetrates the second flange portion 31b to which the sliding plate 7 is fixed and the splice plate 4 to which the friction plate 8 is fixed in the out-of-plane direction. The torsia bolt 9 is provided at the shaft body portion 9b having a threaded shaft portion 9a into which the nut 10 is screwed, the head portion 9c provided at one end of the shaft body portion 9b, and the other end of the shaft body portion 9b. It has a tip shaft portion 9d through which the nut 10 can be inserted. The tip shaft portion 9d is a portion that is gripped and receives a reaction force when the nut 10 is rotationally screwed.

The splice plate 4 and the friction plate 8 are provided with round holes 4a and 8a having a diameter slightly larger than the diameter of the torusia bolt 9, and the second flange portion 31b and the sliding plate 7 are provided with the torusia bolt 9. An elongated hole 31c having a width slightly wider than the diameter and long in the longitudinal direction of the H-shaped steel 30 is provided.

The torsia bolt 9 is inserted through the second flange portion 31b from the outside (anti-web portion 32 side) to the inside (web portion 32 side). That is, the head portion 9c of the torsia bolt 9 is arranged outside the second flange portion 31b. A plurality of stacked disc springs 11 are provided between the head portion 9c of the torsia bolt 9 and the splice plate 4, and the splice plate 4 and the disc spring 11 together with the sliding plate 7 and the friction plate 8 are provided. The torsia bolt 9 is penetrated. Here, the number of disc springs 11 may be one.

The disc spring 11 is provided together with the bush 12 and the washer 13. The bush 12 has a tubular portion 12a that is inserted into a hole 11a provided in the disc spring 11, and is connected to the tubular portion 12a and is arranged between the disc spring 11 and the head portion 9c. It has 12b. The tubular portion 12a and the flat surface portion 12b have a penetrating portion 12c through which the torusia bolt 9 penetrates and is formed by a hole slightly larger than the diameter of the torusia bolt 9. The outer diameter of the tubular portion 12a is formed to be slightly smaller than the diameter of the hole 11a provided in the disc spring 11, and serves as a guide when the disc spring 11 is compressively deformed.

The flat surface portion 12b forms a flat surface substantially parallel to the splice plate 4 on the disc spring 11 with the tubular portion 12a inserted into the hole 11a of the disc spring 11, and is larger than the head portion 9c of the torsia bolt 9. It has a diameter. That is, even after the torusia bolt 9 is tightened, the flat surface portion 12b projects toward the outer periphery of the head portion 9c of the torusia bolt 9.

The disc spring 11 is compressed between the washer 13 located below the flat surface portion 12b of the bush 12 and the washer 14 located below the disc spring 11 by tightening the nut 10, and the second flange A pressure contact force is applied to the portion 31b and the splice plate 4.

The method of pressing the second flange portion 31b and the splice plate 4 in the friction damper 1 is as follows: first, a torsia bolt penetrating the second flange portion 31b, the splice plate 4, the sliding plate 7, the friction plate 8, and the disc spring 11. Temporarily tighten the nut 10 to 9.

Next, for example, using a tool such as a shear wrench manufactured by Jiro Co., Ltd., the nut 10 is rotationally screwed to tighten the nut 10 while grasping the tip shaft portion 9d and using it as a reaction force receiver. At this time, the amount of deflection of the disc spring 11 that is being compressed is confirmed. The torsia bolt 9 has a strength that does not cause shear failure before the nut 10 is tightened until the disc spring 11 is compressed by a predetermined predetermined amount.

According to the pressure welding method of the present embodiment, the nut 10 is rotationally screwed to tighten the nut 10 while grasping the tip shaft portion 9d provided in the torsia bolt 9 and using it as a reaction force receiver, so that the rotation of the torsia bolt 9 is restricted. Or, it is not necessary to use the surrounding members as a reaction force receiver. Further, since the tip shaft portion 9d protrudes on the side opposite to the screwing direction of the nut 10, the nut 10 can be easily tightened while gripping the tip shaft portion 9d from the inside of the second flange portion 31b. is there. Therefore, it is possible to provide a pressure welding method capable of easily applying a pressure contact force to the two stacked splice plates 4 and the second flange portion 31b.

At this time, since the nut 10 is tightened until the disc spring 11 is compressed by a predetermined amount, the disc spring 11 is compressed by a predetermined amount and the two splice plates 4 and the second flange portion 31b are pressure-welded with a desired elastic force. It is possible to do.

Further, before the nut 10 is tightened until the disc spring 11 is compressed by a predetermined amount to obtain a desired pressure contact force, the torsia bolt 9 is sheared by a shaft body portion 9b, a thread shaft portion 9a, a tip shaft portion 9d, or the like. Since it does not break, it is possible to more reliably apply a desired pressure contact force to the disc spring 11.

In the above embodiment, an example in which a plurality of plate members stacked in the out-of-plane direction are composed of two splice plates 4 and a second flange portion 31b has been described, but the present invention is not limited to this, and one plate is used. A plurality of plate materials are overlapped, such as a form in which the splice plate and the flange portion or the web portion are overlapped with each other, or a form in which a plurality of splice plates are overlapped so as to face the splice plate. It doesn't matter.

In the above embodiment, an example in which the torsia bolt 9 is used as a bolt that penetrates a plurality of plate members in the out-of-plane direction has been described, but the present invention is not limited to this, and the disc spring is compressed by a predetermined amount by having a tip shaft portion. Any bolt may be used as long as it has a strength that does not cause shear failure at the shaft body, the threaded shaft, the tip shaft, etc. before the nut is tightened.

The above embodiment is for facilitating the understanding of the present invention, and is not for limiting the interpretation of the present invention. It goes without saying that the present invention can be modified and improved without departing from the spirit thereof, and the present invention includes an equivalent thereof.

1 Friction damper, 4 Splice plate (plate material), 9 Torsia bolt (bolt),
9a thread shaft, 9b shaft body, 9c head, 9d tip shaft,
10 nuts, 11 disc springs, 31b second flange (plate material),

Claims (3)

This is a pressure welding method in which a plurality of plate materials are superposed in the out-of-plane direction, and a nut screwed into a bolt penetrating the plurality of plate materials in the out-of-plane direction is tightened and pressure-welded.
The bolt is provided at one end of a shaft main body portion having a threaded shaft portion arranged along the out-of-plane direction and one end of the shaft main body portion, and is arranged on one side of the plurality of plate members in the out-of-plane direction. It has a head portion to be formed and a tip shaft portion provided at the other end and arranged on the other side of the plurality of plate members in the out-of-plane direction.
The nut is screwed onto the thread shaft portion on the other side of the plurality of plate members.
A disc spring is provided between the plurality of plates and the head, or between the plurality of plates and the nut.
A pressure welding method characterized in that the nut is rotationally screwed while gripping the tip shaft portion and receiving a reaction force, and the nut is tightened until the disc spring is compressed by a predetermined amount. The pressure welding method according to claim 1.
A pressure welding method, characterized in that the bolt has a strength that does not cause shear fracture before the nut is tightened until the disc spring is compressed by the predetermined amount. The pressure welding method according to claim 1 or 2.
A pressure welding method, characterized in that the predetermined amount of compression of the disc spring is confirmed by the amount of deflection of the disc spring.

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