JP7281009B1 - Building materials and fittings - Google Patents

Abstract

The object of the present invention is to facilitate construction management, prevent loosening of a bolt from a nut, easily maintain a tightened state within a proper torque range, and obtain adequate bonding strength with the bolt. . A building material (1) comprises a building material body (2), a locking metal fitting (3), a fitting (5) having a plate nut member (50) and an insert nut (60), and a bolt (4). The plate nut member 50 includes an inner peripheral plate portion 51 having a female screw hole 55 , an extension portion 52 , and an outer peripheral plate portion 53 . The insert nut 60 includes a nut body portion 61 , a tubular portion 62 , an inner peripheral threaded portion 80 , and an outer peripheral threaded portion 70 formed on the outer peripheral surface of the tubular portion 62 . The inner peripheral threaded portion 80 is provided with inner peripheral locking means 65 . The outer threaded portion 70 is screwed into the female threaded hole 55 of the plate nut member 50 , and the bolt 4 is inserted through the bolt insertion holes 35 and 25 and screwed into the inner peripheral threaded portion 80 of the insert nut 60 . . [Selection drawing] Fig. 2

Description

The present invention relates to building materials and fittings.

In buildings such as buildings, factories, and warehouses, construction materials such as extruded cement panels (ECP) and ALC (autoclaved lightweight aerated concrete) materials are sometimes used for outer walls and partition walls. Such building materials are attached to the building body via locking fittings.

7 and 8 illustrate structures for attaching building materials to a building body.
In the configuration shown in FIG. 7, locking fittings 101 for attaching building materials 200 to the building body are locked to angle members or the like provided on the building body. The locking metal fittings 101 are attached to the building material 200 using bolts 102 and nut members 103 . The locking fitting 101 is arranged on the building body side (on the right side of the drawing in FIG. 7) with respect to the building material 200 . The bolt 102 is passed through the locking metal fitting 101 and the building material 200 from the building body side. The nut member 103 is arranged on the side opposite to the locking fitting 101 with the building material 200 interposed therebetween. The nut member 103 is screwed onto the bolt 102 . The nut member 103 is a plate-like plate nut and has a female screw hole 103h into which the bolt 102 is screwed. A flat washer 104 and a spring washer 105 are interposed between the head 102a of the bolt 102 and the locking fitting 101. As shown in FIG.

Moreover, in the configuration shown in FIG. 8 , the locking fitting 101 is attached to the building material 200 using the bolt 102 and the nut member 107 . The nut member 107 has a plate-like portion 107a and a pair of inclined plate portions 107b formed on both sides of the plate-like portion 107a. The plate-like portion 107a has a female screw hole 107h into which the bolt 102 is screwed. The pair of inclined plate portions 107b extend inclined toward the building material 200 with increasing distance from the plate-like portion 107a. A bolt 102 is screwed into the female threaded hole 107h. In this state, the tip portions 107s of the pair of inclined plate portions 107b of the nut member 107 are in contact with the building material 200, and the plate-like portion 107a is in a state of leaving a gap between the building material 200 and the nut member 107.

By the way, when the building material 200 is attached to the building body using the configuration shown in FIGS. There is a risk that it will be lost. Also, if the bolt 102 is tightened with excessive torque, cracks may occur in the building material 200 around the bolt 102 and the nut members 103 and 107 . In the configuration shown in FIG. 8, the tip portions 107s of the pair of inclined plate portions 107b may bite into the building material 200 and cause cracks. For this reason, when attaching the building material 200 to the building body, it is necessary to observe the proper torque range when tightening the bolts 102, which requires time and effort for construction management.

However, even if the bolt 102 is tightened within an appropriate torque range, the bolt 102 and the nut members 103 and 107 may become loose over time due to microvibrations caused by earthquakes, wind, etc. over a long period of time. There is also a possibility that it will be lost.
Further, in order to connect the building material 200 with a pin, it is necessary to manage the tightening torque of the bolt 102 so as to be within the torque range corresponding to the pin connection. If the tightening torque of the bolt 102 exceeds the torque range corresponding to pin joint, the building material 200 will be rigidly joined to the building body instead of pin joint. Therefore, when pin-joining the building material 200 to the building body, it is necessary to strictly manage the tightening torque of the bolts 102 .
However, as described above, if the nut members 103 and 107 loosen with the passage of time, the pin-joined state of the building material 200 cannot be maintained.

Furthermore, as shown in FIGS. 7 and 8, when the building material 200 is an extruded cement board, this building material 200 has a hollow portion 200k. In this case, the nut members 103, 107 are arranged inside the hollow portion 200k. When the nut members 103 and 107 are arranged inside the hollow portion 200k, the nut members 103 and 107 cannot be seen from the outside of the building material 200. For this reason, even if the nut members 103 and 107 are loosened or come off, it is difficult to confirm it, and it cannot be said that the maintainability is excellent.

In addition, in the nut members 103 and 107 as shown in FIGS. 7 and 8, the length of the female screw holes 103h and 107h in the direction along the central axis of the bolt 102 is the plate thickness of the nut members 103 and 107. is equivalent to Therefore, the engagement length between the bolt 102 and the female screw holes 103h and 107h of the nut members 103 and 107 is limited by the plate thickness of the nut members 103 and 107. FIG. As a result, sufficient bonding strength between the bolt 102 and the nut members 103 and 107 may not be ensured.

On the other hand, Patent Publication 1 discloses a configuration in which a nut is previously welded to a plate (reinforcing locking fitting). In this way, it is conceivable to use a plate with a nut welded thereto instead of the nut members 103 and 107 as described above. In this case a nut welded to the plate is screwed onto the bolt 102 . The thickness of the nut is generally greater than the thickness of the plate-like nut members 103,107. Therefore, it is possible to increase the length of engagement between the bolt 102 and the nut, and to properly ensure the strength of the connection between the bolt 102 and the nut. However, in such a configuration, it is necessary to weld the nut to the plate in advance, which is troublesome.

JP 2017-149282 A

An object of the present invention is to facilitate construction management, prevent the nut from loosening from the bolt, easily maintain the tightened state within the appropriate torque range, and obtain an appropriate bonding strength with the bolt. It is to provide building materials and mounting hardware that can

In order to solve the above problems, the present invention employs the following means.
That is, the building material of the present invention comprises a building material body, a locking fitting arranged along one surface of the building material body for locking the building material body to the building body, and the building material body. A plate-like plate nut member arranged along the other surface of the main body, a fitting having an insert nut screwed onto the plate nut member, and a bolt. The plate nut member includes an inner peripheral plate portion having a female screw hole penetrating through a first side and a second side in the plate thickness direction, and a radially outward direction of the female screw hole from the inner peripheral plate portion. and an outer peripheral plate portion extending radially outward from the extending portion in parallel with the inner peripheral plate portion. The insert nut includes a nut body portion having a tool engagement portion with which a tool can be engaged, a tubular portion continuously extending from the nut body portion toward the first side in the plate thickness direction, the nut body portion, and an inner peripheral threaded portion having a helical inner peripheral thread groove that is formed in the inner peripheral surface of a hole that penetrates the cylindrical portion in the plate thickness direction and continues around the central axis of the hole; An outer peripheral threaded portion is formed on the outer peripheral surface and has a spiral outer peripheral thread groove that continues in a direction opposite to the inner peripheral threaded portion around the central axis of the hole. The inner peripheral threaded portion includes an inner peripheral locking means for preventing loosening of the bolt screwed with the inner peripheral threaded portion, and the outer peripheral threaded portion of the insert nut is connected to the female screw hole of the plate nut member. The bolt is inserted from one side of the building material body into bolt insertion holes formed in each of the locking fitting and the building material body, and the inner peripheral threaded portion of the insert nut is screwed on.

According to such a configuration, the locking fitting arranged along one surface of the building material body is composed of the mounting fitting including the plate nut member and the insert nut, and the bolt screwed to the insert nut. It is attached to the building material body.
The bolt is screwed into an inner peripheral threaded portion formed in the inner peripheral surface of a hole extending through the nut main body portion and the cylindrical portion of the insert nut. That is, the bolt is screwed into the inner peripheral threaded portion formed over the nut main body portion and the cylindrical portion of the insert nut. As a result, it is possible to secure a large length of the inner peripheral screw portion in the direction along the central axis of the bolt. Therefore, it is possible to increase the engagement length between the bolt and the insert nut in the direction along the central axis of the bolt. As a result, the joint strength between the bolt and the insert nut is enhanced.
The insert nut is attached to the plate nut member by screwing the outer peripheral threaded portion into the female threaded hole of the plate nut member. Therefore, the mounting hardware can be configured without welding the insert nut and the plate nut member, and labor is not required during construction.
In addition, since the inner peripheral threaded portion is provided with the inner peripheral loosening preventing means, loosening of the bolt screwed with the inner peripheral threaded portion is suppressed. As a result, loosening and falling off of the mounting hardware including the insert nut from the bolt can be suppressed. Therefore, when the bolt is tightened within a preset proper torque range, the tightened state is stably maintained. As a result, it is possible to reduce the need to check the tightening state of the mounting hardware after construction, and maintainability is improved. In particular, since the building material body is an extruded cement board having a hollow portion, and the mounting hardware is arranged in the hollow portion, it is maintenance-free even if it cannot be visually observed from the outside after construction. High effect can be obtained.
Further, the outer thread groove of the outer threaded portion screwed into the female threaded hole of the plate nut member is continuous in the opposite direction around the central axis of the hole with respect to the inner threaded groove of the inner threaded portion to which the bolt is screwed. are doing. Therefore, when the bolt is screwed into the inner threaded portion, the outer threaded portion is tightened into the female threaded hole of the plate nut member by rotating the bolt around the central axis. Thereby, the insert nut is firmly fixed to the plate nut member, and the loosening of the insert nut from the plate nut member can be prevented.
Further, in a state in which the bolt is fastened to the insert nut, the outer peripheral plate portion of the plate nut abuts against the surface of the building material main body to come into surface contact. Therefore, for example, even if the bolt is tightened with an excessive torque exceeding a preset proper torque range, the force applied to the building material body via the plate nut member when the bolt is tightened is dispersed. Therefore, the occurrence of cracks or the like in the building material body can be suppressed. In addition, even if the bolt is tightened with a torque less than the appropriate torque range, the loosening and falling off of the mounting hardware including the insert nut can be suppressed by the inner circumference locking means. In this way, even if the bolt is tightened with a torque outside the proper torque range, the occurrence of troubles can be suppressed, so construction management is facilitated.
By using such a fitting, it is possible to reliably attach the locking fitting to the building material body.
As a result, construction management becomes easier, the loosening of the nut from the bolt can be prevented, the tightened state can be easily maintained within the appropriate torque range, and it is possible to obtain an appropriate bonding strength with the bolt. becomes.

In one aspect of the present invention, the building material of the present invention is securely attached to the building body via the locking fittings attached to the building material body by the bolt, the plate nut member, and the insert nut. is pinned to

According to such a configuration, the building material is pin-joined to the building body, so that the building material moves relative to the building body when an earthquake occurs, and damage to the building material can be suppressed. In addition, loosening of the mounting hardware is suppressed by means for preventing loosening of the inner periphery of the insert nut. Therefore, if the bolt is tightened within an appropriate torque range that is set so that the building materials are pinned together, loosening of the mounting hardware including the insert nut can be suppressed. Therefore, the pin-joined state of the building materials can be stably maintained, so that maintenance-free operation is possible.

A mounting bracket according to the present invention is a mounting bracket for attaching a member to be attached to a building material body using a bolt, comprising: a plate-like plate nut member arranged along the surface of the building material body; an insert nut that is screwed onto the plate nut member. The plate nut member includes an inner peripheral plate portion having a female screw hole penetrating through a first side and a second side in the plate thickness direction, and a radially outward direction of the female screw hole from the inner peripheral plate portion. and an outer peripheral plate portion extending radially outward from the extending portion in parallel with the inner peripheral plate portion. The insert nut includes a nut main body portion having a tool engaging portion with which a tool can be engaged, a cylindrical portion continuously extending from the nut main body portion in a cylindrical shape toward a first side in the plate thickness direction, and the nut. an inner peripheral threaded portion having a helical inner peripheral thread groove formed in an inner peripheral surface of a hole penetrating the body portion and the cylindrical portion in the plate thickness direction and continuing around the central axis of the hole; An outer peripheral threaded portion is formed on the outer peripheral surface of the shaped portion and has a helical outer peripheral thread groove that continues in the direction opposite to the inner peripheral threaded portion around the central axis of the hole. The inner peripheral threaded portion includes an inner peripheral locking means for preventing loosening of the bolt screwed with the inner peripheral threaded portion, and the outer peripheral threaded portion of the insert nut is connected to the female screw hole of the plate nut member. is screwed on.

According to such a configuration, the member to be attached arranged along one surface of the building material body is sandwiched between the attachment fitting including the plate nut member and the insert nut, and the bolt screwed to the insert nut. It can be attached to the main body of the building material.
In such a configuration, the bolt is screwed into the inner peripheral threaded portion formed in the inner peripheral surface of the hole extending through the nut main body and the cylindrical portion of the insert nut. Thereby, the bolt is screwed into the inner peripheral threaded portion formed over the nut main body portion and the cylindrical portion of the insert nut. As a result, it is possible to secure a large length of the inner peripheral screw portion in the direction along the central axis of the bolt. Therefore, it is possible to increase the engagement length between the bolt and the insert nut in the direction along the central axis of the bolt. As a result, the joint strength between the bolt and the insert nut is enhanced.
The insert nut is attached to the plate nut member by screwing the outer peripheral threaded portion into the female threaded hole of the plate nut member. Therefore, the mounting hardware can be configured without welding the insert nut and the plate nut member, and labor is not required during construction.
In addition, since the inner peripheral threaded portion is provided with the inner peripheral loosening preventing means, loosening of the bolt screwed with the inner peripheral threaded portion is suppressed. As a result, loosening and falling off of the mounting hardware including the insert nut from the bolt can be suppressed. Therefore, when the bolt is tightened within a preset proper torque range, the tightened state is stably maintained. As a result, it is possible to reduce the need to check the tightening state of the mounting hardware after construction, and maintainability is enhanced. In particular, since the building material body is an extruded cement board having a hollow portion, and the mounting hardware is arranged in the hollow portion, it is maintenance-free even if it cannot be visually observed from the outside after construction. High effect can be obtained.
Further, the outer thread groove of the outer threaded portion screwed into the female threaded hole of the plate nut member is continuous in the opposite direction around the central axis of the hole with respect to the inner threaded groove of the inner threaded portion to which the bolt is screwed. are doing. Therefore, when the bolt is screwed into the inner threaded portion, the outer threaded portion is tightened into the female threaded hole of the plate nut member by rotating the bolt around the central axis. Thereby, the insert nut is firmly fixed to the plate nut member, and the loosening of the insert nut from the plate nut member can be prevented.
Further, in a state in which the bolt is fastened to the insert nut, the outer peripheral plate portion of the plate nut abuts against the surface of the building material main body to come into surface contact. Therefore, for example, even if the bolt is tightened with an excessive torque exceeding a preset proper torque range, the force applied to the building material body via the plate nut member when the bolt is tightened is dispersed. Therefore, the occurrence of cracks or the like in the building material body can be suppressed. In addition, even if the bolt is tightened with a torque less than the appropriate torque range, the loosening and falling off of the mounting hardware including the insert nut can be suppressed by the inner circumference locking means. In this way, even if the bolt is tightened with a torque outside the proper torque range, the occurrence of troubles can be suppressed, so maintenance management as well as construction management can be facilitated.
As a result, construction management becomes easier, the loosening of the nut from the bolt can be prevented, the tightened state can be easily maintained within the appropriate torque range, and it is possible to obtain an appropriate bonding strength with the bolt. becomes.

In one aspect of the present invention, the inner circumference locking means has a helical coil spring portion that is held by the nut body portion and engages with the thread groove of the bolt.

According to such a configuration, when the bolt is rotated in the loosening direction, the diameter of the spiral coil spring portion is reduced. As a result, the bolt is strongly held by the coil spring portion, and loosening of the bolt can be suppressed.
By using the inner peripheral locking means having such a spring member, the trouble of torque control of the bolt is reduced, and construction control is facilitated.

In one aspect of the present invention, the inner peripheral plate portion has a contact surface that extends radially outward from the female screw hole and that the bearing surface of the nut body portion contacts.

According to such a configuration, since the inner peripheral plate portion has the contact surface that expands radially outward from the female threaded hole, the seat surface of the nut main body portion is brought into contact with the contact surface, and the insert nut is inserted. The seat surface and the contact surface of the can be brought into surface contact. As a result, while the bolt is screwed to the insert nut, the tightening force of the bolt can be stably transmitted from the insert nut to the surface of the building material body via the plate nut member. In addition, loosening of the insert nut can be suppressed by frictional resistance due to surface contact between the bearing surface and the contact surface of the insert nut.

According to the present invention, construction management is facilitated, the loosening of the nut from the bolt can be prevented, the tightened state can be easily maintained within the appropriate torque range, and the strength of the connection with the bolt can be properly obtained. be able to.

1 is a perspective view showing the configuration of a building material according to an embodiment of the present invention; FIG. FIG. 4 is a plan cross-sectional view of a portion where the locking metal fitting is attached to the building material by the mounting metal fitting according to the embodiment of the present invention; It is an enlarged cross-sectional view showing a portion around a mounting bracket and a bolt according to the present embodiment. It is a perspective view which shows the external appearance of the mounting bracket which concerns on this embodiment. It is the figure which looked at the mounting bracket which concerns on this embodiment from the plate|board thickness direction. It is a perspective view which shows the external appearance of the insert nut which concerns on this embodiment. 1 is a cross-sectional view showing an example of a conventional configuration for attaching a locking metal fitting to a building material; FIG. FIG. 4 is a cross-sectional view showing another example of a conventional configuration for attaching a locking metal fitting to a building material;

EMBODIMENT OF THE INVENTION Hereinafter, with reference to an accompanying drawing, the form for implementing the building material by this invention, and a fitting is demonstrated based on drawing.
FIG. 1 shows a perspective view showing the configuration of a building material according to an embodiment of the present invention. FIG. 2 is a plan cross-sectional view of a portion where the locking metal fitting is attached to the building material by the metal fitting according to the embodiment of the present invention.
As shown in FIG. 1, the building material 1 is attached to a building body 90 such as a building, a factory, a warehouse, etc., using locking fittings 3, which will be described later.

As shown in FIGS. 1 and 2, the building material 1 mainly includes a building material body 2 , locking metal fittings (mounted members) 3 , bolts 4 and mounting metal fittings 5 .
The building material main body 2 is an object to which the locking metal fittings 3 are attached with the bolts 4 and the mounting metal fittings 5 . The building material main body 2 is a member made of concrete. The building material main body 2 is attached to the building main body 90 to constitute the outer wall of the building and the partition wall. In this embodiment, the building material body 2 is an extruded cement board having a plate shape as a whole. The building material body 2 in this embodiment integrally has a first panel portion 21 , a second panel portion 22 , and a plurality of connection portions 23 .

The first panel portion 21 and the second panel portion 22 are arranged with a space therebetween in the plate thickness direction Dt of the building material body 2 . The first panel portion 21 and the second panel portion 22 are each formed in a plate shape along a plane perpendicular to the plate thickness direction Dt. The first panel portion 21 is arranged on the first side in the plate thickness direction Dt (the side close to the building body 90). The second panel portion 22 is arranged on the second side (the side away from the building body 90) in the plate thickness direction Dt.
A plurality of connection portions 23 are arranged between the first panel portion 21 and the second panel portion 22 . The plurality of connecting portions 23 are arranged at intervals in the width direction Dw of the building material body 2 that intersects the plate thickness direction Dt and the vertical direction Dv. Each connecting portion 23 extends in the plate thickness direction Dt and connects the first panel portion 21 and the second panel portion 22 .
The building material main body 2 has a hollow portion 24 between the first panel portion 21, the second panel portion 22, and the connection portions 23 adjacent to each other in the width direction Dw. The hollow portion 24 extends in the vertical direction Dv and vertically penetrates the building material body 2 .
A bolt insertion hole 25 for inserting the bolt 4 is formed at a predetermined position in the first panel portion 21 so as to penetrate the first panel portion 21 in the plate thickness direction Dt.

The locking fitting 3 is arranged along one surface 21 f of the first panel portion 21 of the building material body 2 . As shown in FIG. 1 , the locking fitting 3 is made of metal and integrally includes a base portion 31 , a connecting portion 32 and a locking portion 33 . The base portion 31 extends along the surface 21 f of the first panel portion 21 . The base portion 31 has a bolt insertion hole 35 passing through the base portion 31 in the plate thickness direction Dt. The connecting portion 32 connects the base portion 31 and the locking portion 33 . The connecting portion 32 extends from the base portion 31 while being inclined in a direction (downward) away from the base portion 31 in the vertical direction Dv toward the first side in the plate thickness direction Dt. The locking portion 33 continues from the connecting portion 32 and extends parallel to the surface 21 f of the first panel portion 21 . The locking portion 33 is locked to a locked portion 91 such as an angle member provided on the building body 90 . Thereby, the building material 1 is held by the locked portion 91 .

FIG. 3 is an enlarged cross-sectional view showing parts around the mounting hardware and the bolt according to the present embodiment.
As shown in FIG. 2, the locking metal fittings 3 are attached to the building material body 2 with bolts 4 and mounting metal fittings 5 .
As shown in FIGS. 2 and 3, the bolt 4 integrally has a shaft portion 41 and a head portion 42 . The bolt 4 is arranged with its central axis C along the plate thickness direction Dt of the building material main body 2 .
The shaft portion 41 extends along the central axis C. As shown in FIG. The head portion 42 is formed at one end of the shaft portion 41 . The head 42 has, for example, a hexagonal cross section and can be engaged with a tool such as a spanner or wrench. A male screw portion 43 is formed on the outer peripheral surface of the shaft portion 41 . In the present embodiment, the male screw portion 43 continues spirally around the central axis C of the shaft portion 41 in a direction away from the head portion 42 along the central axis C. It has an external thread groove for the screw. Such a bolt 4 can be tightened into an insert nut 60 described later by rotating it clockwise when viewed from the head 42 side.

FIG. 4 is a perspective view showing the appearance of the mounting hardware according to this embodiment. FIG. 5 is a diagram of the mounting hardware according to the present embodiment as seen from the plate thickness direction.
As shown in FIGS. 2 and 3 , the mounting hardware 5 includes a plate nut member 50 and an insert nut 60 . The mounting hardware 5 is arranged in the hollow portion 24 of the building material body 2 .
The plate nut member 50 is arranged along the other surface 21 g of the building material body 2 . As shown in FIGS. 4 and 5, the plate nut member 50 is, for example, rectangular when viewed from the plate thickness direction Dt. The plate nut member 50 integrally includes an inner peripheral plate portion 51 , an extension portion 52 , and an outer peripheral plate portion 53 .

As shown in FIG. 5, the inner peripheral plate portion 51 is formed in a circular shape when viewed from the plate thickness direction Dt. A diameter D1 of the inner peripheral plate portion 51 when viewed from the plate thickness direction Dt is formed to be larger than a diameter D2 of the nut main body portion 61 of the insert nut 60, which will be described later. As a result, the inner peripheral plate portion 51 has a contact surface 51f that expands radially outward from the female screw hole 55 and with which a bearing surface 61f of the nut main body portion 61, which will be described later, abuts.
As shown in FIGS. 2 and 3, a female screw hole 55 is formed in the central portion of the inner peripheral plate portion 51 so as to penetrate the inner peripheral plate portion 51 to the first side and the second side in the plate thickness direction Dt. ing.
As shown in FIGS. 2 , 3 , and 5 , the extending portion 52 is formed radially outward of the female screw hole 55 with respect to the inner peripheral plate portion 51 . The extending portion 52 extends from the inner peripheral plate portion 51 toward the radially outer side of the female screw hole 55 toward the first side in the plate thickness direction Dt while being inclined or curved.
The outer peripheral plate portion 53 is formed radially outward with respect to the extending portion 52 . The outer peripheral plate portion 53 extends along a plane orthogonal to the plate thickness direction Dt. That is, the outer peripheral plate portion 53 extends radially outward from the extending portion 52 in parallel with the inner peripheral plate portion 51 . As shown in FIG. 2, the outer peripheral plate portion 53 has a flat portion 53f on the first side in the plate thickness direction Dt, which contacts the surface 21g of the first panel portion 21 of the building material body 2. As shown in FIG.

As shown in FIG. 2, such a plate nut member 50 is configured such that the extending portion 52 and the inner peripheral plate portion 51 are arranged on the second side in the plate thickness direction Dt with respect to the outer peripheral plate portion 53. A recessed portion 54 recessed from the outer peripheral plate portion 53 toward the second side in the plate thickness direction Dt is formed. The concave portion 54 prevents burrs generated around the bolt insertion holes 25 from forming the bolt insertion holes 25 on the surface 21g of the first panel portion 21 from projecting to the second side in the plate thickness direction Dt. , can avoid interference with burrs.
A sealing member 58 is accommodated inside the recess 54 . The seal member 58 is made of a rubber-based material or the like. The seal member 58 has a through hole 59 that communicates with the bolt insertion hole 25 . The seal member 58 is sandwiched between the inner peripheral plate portion 51 and the first panel portion 21 in a compressed state. This prevents rainwater or the like from entering the hollow portion 24 from the outside of the building material body 2 through the bolt insertion hole 25 .

FIG. 6 is a perspective view showing the appearance of the insert nut according to this embodiment.
As shown in FIGS. 3 and 6, the insert nut 60 integrally has a nut body portion 61 and a cylindrical portion 62 .
The nut main body portion 61 has a tool engaging portion 63 on its outer peripheral surface with which a tool can be engaged. In this embodiment, the tool engaging portion 63 has a hexagonal cross-sectional shape perpendicular to the central axis C, and can be engaged with a tool such as a spanner or a wrench. The cylindrical portion 62 continues from the nut main body portion 61 and extends in a cylindrical shape along the central axis C toward the first side in the plate thickness direction Dt. The tubular portion 62 is formed to have a diameter smaller than that of the nut body portion 61 . As a result, the nut body portion 61 spreads radially outward from the cylindrical portion 62 . A bearing surface 61f facing the first side in the plate thickness direction Dt is formed at the end portion of the nut body portion 61 on the first side in the plate thickness direction Dt.
The insert nut 60 is formed with a hole 64 passing through the nut body portion 61 and the cylindrical portion 62 in the plate thickness direction Dt.

The insert nut 60 further includes an outer threaded portion 70 , an inner threaded portion 80 , and an inner periphery locking means 65 .
The outer threaded portion 70 is formed on the outer peripheral surface of the tubular portion 62 . The outer threaded portion 70 has an outer threaded groove 71 . The outer threaded groove 71 is provided radially outside of the inner threaded portion 80 when viewed in the plate thickness direction Dt. The outer peripheral thread groove 71 extends counterclockwise around the central axis C from the distal end portion 62a of the tubular portion 62 on the first side in the plate thickness direction Dt toward the base end portion 62b on the second side in the plate thickness direction Dt. It is a so-called reverse thread that continues spirally around (counterclockwise). The outer peripheral thread groove 71 is spirally continuous in the opposite direction around the central axis C to the inner peripheral thread groove 81 of the inner peripheral thread portion 80 described later.

The inner peripheral screw portion 80 is formed on the inner peripheral surface of the hole 64 . That is, the inner peripheral screw portion 80 is formed over both the nut body portion 61 and the cylindrical portion 62 in the plate thickness direction Dt. The inner peripheral threaded portion 80 has an inner peripheral thread groove 81 . The inner peripheral thread groove 81 is a so-called normal thread that continues spirally clockwise (rightward) around the central axis C from the distal end portion 62a of the cylindrical portion 62 toward the second side in the plate thickness direction Dt. It is

As shown in FIGS. 4 to 6, the inner peripheral locking means 65 is housed in a housing recess 68 formed in the nut main body 61. As shown in FIGS. The housing recess 68 is formed in the nut main body 61 so as to be recessed from the end 61t on the second side in the plate thickness direction Dt toward the first side in the plate thickness direction Dt. The accommodation recess 68 is formed in a circular shape, a polygonal shape, or the like when viewed in the plate thickness direction Dt. In the present embodiment, the accommodation recess 68 has, for example, a hexagonal shape when viewed in the plate thickness direction Dt, and the inner diameter thereof is larger than the inner diameter of the hole 64 . Further, the nut body portion 61 is formed with a locking hole 69 that communicates the inside of the housing recess 68 with the outer peripheral surface of the nut body portion 61 .

In this embodiment, a spring member 66 is provided as the inner circumference locking means 65 . The spring member 66 is made of a wire having elasticity, and integrally has a coil spring portion 66a and a locking end portion 66b.
The coil spring portion 66a is formed by spirally winding a wire rod. The coil spring portion 66 a is housed inside the housing recess 68 and has an outer diameter substantially equal to the inner diameter of the housing recess 68 . The coil spring portion 66 a has its inner diameter and pitch in the central axis C direction set so as to be screwed into the external thread portion 43 of the bolt 4 that is screwed into the inner peripheral thread portion 80 of the insert nut 60 .
The locking end portion 66b is formed by bending an end portion of a wire forming the spring member 66 radially outward from one end of the coil spring portion 66a. The locking end portion 66 b is inserted (locked) into the locking hole 69 of the nut body portion 61 . By locking the locking end portion 66b in the locking hole 69, the spring member 66 is restricted from moving in the central axis C direction and in the circumferential direction around the central axis C by a certain amount or more.

As shown in FIG. 3 , such an insert nut 60 has an outer peripheral threaded portion 70 screwed into a female threaded hole 55 of the plate nut member 50 , so that the plate nut member 50 is inserted into the plate nut member 50 in the second direction in the thickness direction Dt. attached to the side. When the outer threaded portion 70 is screwed into the female threaded hole 55 of the plate nut member 50 , the seat surface 61 f abuts against the inner peripheral plate portion 51 of the plate nut member 50 . When the insert nut 60 is tightened into the female threaded hole 55 of the plate nut member 50 with a torque greater than or equal to a predetermined value, the outer peripheral threaded portion 70 is elastically deformed in the direction of the central axis C and stretches to exert tension, thereby connecting the seat surface 61f and the plate nut. The frictional force between the member 50 and the frictional force between the outer peripheral screw groove 71 and the female screw hole 55 are increased. Thereby, the insert nut 60 is securely fastened to the plate nut member 50 .
As shown in FIGS. 2 and 3 , the shaft portion 41 of the bolt 4 is screwed onto the inner peripheral screw portion 80 . The bolt 4 is inserted through the bolt insertion holes 35, 25 from the first side to the second side in the plate thickness direction Dt of the first panel portion 21 of the building material main body 2, and the inner peripheral thread of the insert nut 60 is inserted. It is screwed to the portion 80 and the spring member 66 as the inner circumference locking means 65 . The head 42 of the bolt 4 abuts against the locking fitting 3 via a washer 48 and a spring washer 49 from the first side to the second side in the plate thickness direction Dt.
Here, in order to maximize the engagement length of the bolt 4 with the inner peripheral screw portion 80 and the spring member 66 in the direction of the central axis C, it is preferable to make the cylindrical portion 62 as long as possible in the direction of the central axis C. . In this embodiment, the length of the cylindrical portion 62 is set to a thickness equivalent to the plate thickness of the inner peripheral plate portion 51 of the plate nut member 50 to which the outer peripheral screw portion 70 is tightened. As a result, it is possible to secure a long engagement length between the inner peripheral screw portion 80 and the bolt 4 in the direction of the central axis C and a long engagement length between the outer peripheral screw portion 70 and the female screw hole 55 of the plate nut member 50 .

When the shaft portion 41 of the bolt 4 is screwed into the inner threaded portion 80 of the insert nut 60 , the distal end thereof is screwed into the coil spring portion 66 a of the spring member 66 .
When the bolt 4 rotates in the loosening direction for some reason, the spiral coil spring portion 66a tries to rotate in the loosening direction together with the bolt 4 due to the frictional force generated between the bolt 4 and the male screw portion 43 of the bolt 4. do. However, the coil spring portion 66a cannot rotate with the bolt 4 because the locking end portion 66b formed at one end of the coil spring portion 66a is locked to the nut main body portion 61, and the bolt 4 is twisted in the loosening direction. become. Then, the diameter of the coil spring portion 66a is reduced. As a result, the frictional force generated between the coil spring portion 66a and the male screw portion 43 of the bolt 4 increases, and the bolt 4 is strongly held. As a result, the spring member 66 prevents the bolt 4 from loosening.

Further, for example, the outer peripheral threaded portion 70 may be Meck-processed so as to prevent the outer peripheral threaded portion 70 from loosening from the screwed plate nut member 50 . In the MEC processing, a film of the locking material is formed on the surface of the outer peripheral thread groove 71 by previously applying a locking material made of a compound containing microcapsules in which an adhesive is enclosed. to form When the outer peripheral threaded portion 70 is tightened into the female threaded hole 55 of the plate nut member 50 , the microcapsules contained in the film are broken, and the adhesive flows out of the capsule, thereby causing the outer peripheral threaded groove 71 and the female threaded hole 55 to become loose. Fastening strength is increased.
In order to suppress the loosening of the outer peripheral threaded portion 70 from the screwed plate nut member 50, the outer peripheral threaded portion 70 may be coated with a so-called thread lock agent or other loosening prevention processing, not limited to the MEC processing. good.

In order to attach the locking metal fitting 3 to the building material main body 2 using the mounting metal fitting 5 as described above, the following procedure is performed.
First, prior to attaching the locking fitting 3 to the building material main body 2, the insert nut 60 is attached to the plate nut member 50 in advance. For this purpose, the outer threaded portion 70 of the insert nut 60 is screwed into the female threaded hole 55 formed in the inner peripheral plate portion 51 of the plate nut member 50 . To tighten the insert nut 60, the tool engaging portion 63 is engaged with a tool such as a spanner or a wrench to rotate the insert nut 60 around the central axis C. As shown in FIG. Since the outer threaded portion 70 is a reverse thread, the insert nut 60 is tightened by rotating it counterclockwise around the central axis C when viewed from the nut body portion 61 side (the side facing the plate nut member 50). be taken in. Such an operation of attaching the insert nut 60 can be performed at a factory or the like.

Next, at the assembly site of the building material 1, the mounting hardware 5 is inserted into the hollow portion 24 of the building material body 2, and the outer peripheral plate portion 53 of the plate nut member 50 abuts against the surface 21g of the first panel portion 21. to set. The mounting hardware 5 is aligned so that the center of the bolt insertion hole 25 coincides with the center of the female screw hole 55 of the plate nut member 50 .
Also, the base portion 31 of the locking metal fitting 3 is set along the surface 21 f of the first panel portion 21 . The locking fitting 3 is aligned so that the bolt insertion hole 35 communicates with the bolt insertion hole 25 of the first panel portion 21 .

Subsequently, from the first side in the plate thickness direction Dt of the building material main body 2, the shaft portion 41 of the bolt 4 is inserted through the bolt insertion holes 35 and 25 to the inner circumference of the insert nut 60 in the female screw hole 55. Tighten the threaded portion 80 . The bolt 4 is tightened by engaging a tool such as a spanner or wrench with the tool engaging portion 63 of the insert nut 60 to restrain the rotation of the mounting hardware 5 around the central axis C, and then tighten the head 42. , by engaging a tool such as a spanner or wrench. The bolt 4 is rotated around the central axis C. Since the male threaded portion 43 of the bolt 4 and the inner thread groove 81 of the inner threaded portion 80 are normal threads, the bolt 4 is viewed from the head portion 42 side (the side facing the surface 51f of the plate nut member 50). and rotate it clockwise around the central axis C to tighten it.

The bolt 4 is tightened with a torque within a preset proper torque range using a torque wrench. As a result, tension is generated in the shaft portion 41 and the bolt 4 is fastened to the insert nut 60 . As a result, the locking metal fitting 3 is sandwiched and fixed between the head 42 of the bolt 4 and the surface 21f of the first panel portion 21 .
Here, in this embodiment, the building material body 2 is pin-joined to the building body 90 . In order to connect the building material main body 2 with a pin, for example, if the screw diameter of the bolt 4 is set to "M8" according to the ISO metric thread standard, the bolt 4 must be tightened within a torque range of 15 to 20 Nm.

The building material 1 as described above includes the building material body 2 and the locking metal fittings 3 arranged along one surface 21f of the building material body 2 for locking the building material body 2 to the building body 90. , a plate-like plate nut member 50 arranged along the other surface 21g of the building material body 2, and a fitting 5 provided with an insert nut 60 screwed to the plate nut member 50, and a bolt 4. I have. The plate nut member 50 includes an inner peripheral plate portion 51 having a female screw hole 55 penetrating the first side and the second side in the plate thickness direction Dt, and a radial direction of the female screw hole 55 extending from the inner peripheral plate portion 51 . An extension portion 52 extending outward toward the first side in the plate thickness direction Dt and an outer peripheral plate portion 53 extending radially outward from the extension portion 52 in parallel with the inner peripheral plate portion 51 are integrally formed. I have. The insert nut 60 includes a nut body portion 61 having a tool engaging portion 63 with which a tool can be engaged, a tubular portion 62 continuously extending from the nut body portion 61 toward the first side in the plate thickness direction Dt, and a nut body. An inner peripheral threaded portion 80 having a helical inner peripheral thread groove 81 that is formed in the inner peripheral surface of a hole 64 penetrating the portion 61 and the cylindrical portion 62 in the plate thickness direction Dt and continues around the central axis C of the hole 64. and an outer peripheral threaded portion 70 formed on the outer peripheral surface of the tubular portion 62 and having a helical outer peripheral threaded groove 71 continuous in the direction opposite to the inner peripheral threaded portion 80 around the central axis C of the hole 64. ing. The inner peripheral threaded portion 80 is provided with an inner peripheral loosening prevention means 65 that prevents loosening of the bolt 4 that is screwed with the inner peripheral threaded portion 80 . The outer threaded portion 70 of the insert nut 60 is screwed into the female threaded hole 55 of the plate nut member 50, and the bolt 4 is threaded from one side of the building material body 2 into each of the locking fitting 3 and the building material body 2. It is inserted through the formed bolt insertion holes 35 and 25 and screwed onto the inner peripheral threaded portion 80 of the insert nut 60 .

According to such a configuration, the locking metal fittings 3 arranged along one surface 21f of the building material body 2 are the mounting metal fittings 5 having the plate nut member 50 and the insert nut 60, and the insert nut 60. It is securely attached to the building material body 2 by being sandwiched between the screwed bolts 4. - 特許庁
The bolt 4 is screwed into an inner peripheral threaded portion 80 formed in the inner peripheral surface of a hole 64 passing through the nut body portion 61 and the cylindrical portion 62 of the insert nut 60 . As a result, the bolt 4 is screwed into the inner peripheral threaded portion 80 formed over the nut body portion 61 and the cylindrical portion 62 of the insert nut 60 . The inner peripheral threaded portion 80 is formed to be longer than the thickness of the plate nut member 50 in the direction (thickness direction Dt) along the central axis C of the bolt 4 . Therefore, a large engagement length between the bolt 4 and the insert nut 60 can be ensured. As a result, the joint strength between the bolt 4 and the insert nut 60 is enhanced.
The insert nut 60 is attached to the plate nut member 50 by screwing the outer peripheral threaded portion 70 into the female threaded hole 55 of the plate nut member 50 . Therefore, the mounting metal fitting 5 can be configured without welding the insert nut 60 and the plate nut member 50, which saves time and effort.
In addition, since the inner peripheral screw portion 80 is provided with the inner peripheral loosening prevention means 65, loosening of the bolt 4 screwed with the inner peripheral screw portion 80 is suppressed. As a result, loosening and falling off of the mounting hardware 5 including the insert nut 60 from the bolt 4 can be suppressed. Therefore, when the bolt 4 is tightened within a preset proper torque range, the tightened state is stably maintained. As a result, the need to check the fastening state of the mounting hardware 5 after construction is reduced, and maintainability is enhanced. Particularly, when the building material main body 2 is an extruded cement board having a hollow portion 24, and the mounting hardware 5 is arranged in the hollow portion 24 and cannot be visually observed from the outside after construction, the effect is particularly high because it is maintenance-free. is obtained.
Further, the outer thread groove 71 of the outer threaded portion 70 screwed into the female threaded hole 55 rotates around the center axis C of the hole 64, while the inner threaded groove 81 of the inner threaded portion 80 to which the bolt 4 is screwed. continuous in the opposite direction. Therefore, when the bolt 4 is rotated around the central axis C when screwing the bolt 4 onto the inner threaded portion 80 , the outer threaded portion 70 is tightened into the female threaded hole 55 of the plate nut member 50 . Thereby, the insert nut 60 is appropriately fixed to the plate nut member 50 .
Further, in a state where the bolt 4 is fastened to the insert nut 60 , the outer peripheral plate portion 53 abuts against the surface 21 g of the building material main body 2 . Therefore, for example, even if the bolt 4 is tightened with an excessive torque exceeding the preset appropriate torque range, the plane portion 53f of the outer peripheral plate portion 53 is in surface contact with the surface 21g of the building material body 2. Therefore, the force applied to the building material body 2 when tightening the bolt 4 is dispersed. Therefore, the plate nut member 50 prevents the building material main body 2 from being cracked or the like. In addition, even if the bolt 4 is tightened with a torque less than the proper torque range, the inner circumference locking means 65 can prevent the mounting hardware 5 including the insert nut 60 from loosening and falling off from the bolt 4 . Therefore, even if the bolt 4 is tightened by a worker with a torque outside the proper torque range, the occurrence of troubles can be suppressed, and construction management is facilitated.
As a result, construction management and maintenance management (maintenance management) are facilitated, loosening of the mounting hardware 5 from the bolt 4 can be prevented, and a tightened state within an appropriate torque range can be easily maintained. It is possible to obtain sufficient bonding strength with.

Also, the building material 1 is pin-joined to the building body 90 via the locking fittings 3 attached to the building material body 2 by the bolts 4 , the plate nut members 50 and the insert nuts 60 .
According to such a configuration, the building material 1 is pin-joined to the building body 90, so that the building material 1 moves relative to the building body 90 when an earthquake occurs, and the building material 1 is prevented from being damaged. can be suppressed. In addition, the looseness of the fitting 5 is suppressed by the inner peripheral looseness preventing means 65 of the insert nut 60 . Therefore, if the bolt 4 is tightened within an appropriate torque range that is set so that the building material 1 is pin-jointed when tightening the bolt 4, loosening of the fitting 5 including the insert nut 60 can be suppressed thereafter. . Therefore, it is possible to stably maintain the state in which the building material 1 is pin-joined.

The mounting hardware 5 as described above is a mounting hardware 5 for attaching the locking metal fitting 3 to the building material body 2 using the bolt 4, and is a plate-shaped member arranged along the surface 21g of the building material body 2. and an insert nut 60 screwed onto the plate nut member 50 . The plate nut member 50 includes an inner peripheral plate portion 51 having a female screw hole 55 penetrating the first side and the second side in the plate thickness direction Dt, and a radial direction of the female screw hole 55 extending from the inner peripheral plate portion 51 . An extension portion 52 extending outward toward the first side in the plate thickness direction Dt and an outer peripheral plate portion 53 extending radially outward from the extension portion 52 in parallel with the inner peripheral plate portion 51 are integrally formed. I have. The insert nut 60 includes a nut body portion 61 having a tool engaging portion 63 with which a tool can be engaged, and a cylindrical portion 62 continuously extending from the nut body portion 61 to the first side in the plate thickness direction Dt. , formed on the inner peripheral surface of a hole 64 penetrating the nut main body portion 61 and the cylindrical portion 62 in the plate thickness direction Dt, and having a spiral inner peripheral thread groove 81 continuous around the central axis C of the hole 64 A threaded portion 80 and an outer peripheral threaded portion 70 having a helical outer peripheral thread groove 71 formed on the outer peripheral surface of the cylindrical portion 62 and continuing in the direction opposite to the inner peripheral threaded portion 80 around the central axis C of the hole 64 . , is equipped with The inner peripheral threaded portion 80 is provided with an inner peripheral loosening prevention means 65 that prevents loosening of the bolt 4 that is screwed with the inner peripheral threaded portion 80 . The outer threaded portion 70 of the insert nut 60 is screwed into the female threaded hole 55 of the plate nut member 50 .

According to the mounting hardware 5 having such a configuration, construction management is facilitated, the loosening of the mounting hardware 5 from the bolt 4 can be prevented, and the tightened state within the proper torque range can be easily maintained. It is possible to obtain sufficient bonding strength with the bolt 4 .

In addition, the inner circumference locking means 65 has a spiral coil spring portion 66 a that is held by the nut body portion 61 and engages with the screw groove of the bolt 4 .
According to such a configuration, when the bolt 4 rotates in the loosening direction, the diameter of the spiral coil spring portion 66a is reduced. As a result, the bolt 4 is strongly held by the coil spring portion 66a, and loosening of the bolt 4 can be suppressed.
By using the inner peripheral loosening preventing means 65 having such a spring member, the trouble of managing the torque of the bolt 4 can be reduced, and construction management can be facilitated.

In addition, the inner peripheral plate portion 51 has a contact surface 51f that expands radially outward from the female screw hole 55 and with which the seat surface 61f of the nut main body portion 61 contacts.
According to this configuration, the inner peripheral plate portion 51 has the contact surface 51f that extends radially outward from the female screw hole 55, so that the seat surface 61f of the nut main body portion 61 becomes the contact surface 51f. can be brought into surface contact. As a result, while the bolt 4 is screwed to the insert nut 60, the tightening force of the bolt 4 is stably transmitted from the insert nut 60 to the surface 21g of the building material body 2 via the plate nut member 50. be able to. Further, the loosening of the insert nut 60 can be suppressed by the frictional resistance due to surface contact between the bearing surface of the insert nut 60 and the contact surface 51f.

(Verification example)
Verification of the loosening prevention function of the insert nut 60 and the occurrence of cracks in the building material body 2 when the locking metal fitting 3 is attached to the building material body 2 using the mounting hardware 5 and bolt 4 as described above. I did, and the results are shown below.
First, the locking function of the insert nut 60 was verified.
As the bolt 4, three types of screw diameters of M8, M10, and M12 were prepared. For the insert nut 60 of the mounting hardware 5, three types of M8, M10, and M12 were prepared, each having a thread diameter of the inner peripheral threaded portion 80 corresponding to the thread diameter of the bolt 4. As shown in FIG.
Using an impact-type vibration tester conforming to NAS (National Aerospace Standard) 3350, after tightening the bolt 4 of each screw diameter to the insert nut 60 with an appropriate tightening torque value, the vibration frequency : 1750 times/min, vibration acceleration: 19.5 G, vibration stroke: 11 mm, impact stroke: 19 mm, number of vibrations: 30000 times.
As a result, it was confirmed that the insert nut 60 did not loosen with any of the thread diameters of M8, M10, and M12.

Next, when the locking metal fittings 3 were attached to the building material body 2 using the mounting metal fittings 5 and the bolts 4, the occurrence of cracks in the building material body 2 was verified.
(Example 1)
The thread diameter of the bolt 4 is set to M10, and the thread diameter of the inner peripheral threaded portion 80 of the insert nut 60 is also set to M10.
As the mounting hardware 5, the one shown in the above embodiment was used. The plate nut member 50 has a plate thickness of 6 mm and a rectangular shape of 40 mm×60 mm when viewed from the plate thickness direction Dt. The female screw hole 55 has a screw diameter of M16 and is formed with a reverse screw. The insert nut 60 has an outer threaded portion 70 with a thread diameter of M16 and a reverse thread. The inner peripheral threaded portion 80 has a thread diameter of M10 and is formed with a forward thread.
For comparison, a nut member 103 (comparative example 1) shown in FIG. 7 and a nut member 107 (comparative example 2) shown in FIG. was attached to the building material body 2.
In each of Example 1 and Comparative Examples 1 and 2, after the bolts 4 were tightened with tightening torques of 20 Nm, 30 Nm, 40 Nm, 50 Nm, 60 Nm, 70 Nm, and 75 Nm, the bolt insertion holes 25 of the building material body 2 were tightened. The presence or absence of cracks in the surrounding area was visually confirmed.
As a result, in Comparative Example 1, it was confirmed that cracks were generated around the bolt insertion hole 25 at a tightening torque of 40 Nm or more. Also, in Comparative Example 2, cracks were observed around the bolt insertion hole 25 at a tightening torque of 75 Nm. On the other hand, in Example 1, cracking around the bolt insertion hole 25 could not be confirmed up to the tightening torque of 75 Nm.

(Modification of embodiment)
In addition, although the extruded cement board was illustrated as the building material main body 2 in the above embodiment, it is not limited to this. The building material main body 2 may be, for example, an ALC plate or the like.
Moreover, although the locking metal fitting 3 for locking the building material body 2 to the building body 90 was illustrated as a to-be-mounted metal fitting, it is not restricted to this. The metal fittings to be attached may be of other uses as long as they are attached to the building material main body 2 using the metal fittings 5 .
In addition to this, it is possible to select the configurations described in the above embodiments or to change them to other configurations as appropriate without departing from the gist of the present invention.

1 building material 60 insert nut 2 building material main body 61 nut main body 3 locking metal fitting 61f seat surface 4 bolt 62 tubular portion 5 mounting metal fitting 63 tool engagement portion 21f one surface 64 hole 21g other surface 65 locking means 25 , 35 bolt insertion hole 66a coil spring portion 50 plate nut member 70 outer peripheral screw portion 51 inner peripheral plate portion 71 outer peripheral screw groove 51f contact surface 80 inner peripheral screw portion 52 extending portion 81 inner peripheral screw groove 53 outer peripheral plate portion 90 building body 55 Female screw hole C Central axis

Claims (3)

a building material body;
a locking fitting disposed along one surface of the building material body for locking the building material body to the building body;
a fitting comprising a plate-shaped plate nut member arranged along the other surface of the building material body and an insert nut screwed onto the plate nut member;
a bolt and a
The plate nut member is
an inner peripheral plate portion having a female screw hole penetrating the first side and the second side in the plate thickness direction;
an extending portion extending from the inner peripheral plate portion toward the first side in the plate thickness direction toward the radially outer side of the female screw hole;
integrally provided with an outer peripheral plate portion extending parallel to the inner peripheral plate portion toward the radially outer side from the extending portion;
The insert nut is
a nut body having a tool engaging portion with which a tool can be engaged;
a tubular portion continuously extending from the nut main body portion to the first side in the plate thickness direction;
an inner peripheral threaded portion having a helical inner peripheral thread groove formed in the inner peripheral surface of the hole penetrating the nut body portion and the cylindrical portion in the plate thickness direction and continuing around the center axis of the hole;
an outer peripheral threaded portion formed on the outer peripheral surface of the cylindrical portion and having a helical outer peripheral thread groove continuous in the direction opposite to the inner peripheral threaded portion around the central axis of the hole,
The inner peripheral threaded portion includes inner peripheral loosening prevention means for suppressing loosening of the bolt screwed with the inner peripheral threaded portion,
the outer threaded portion of the insert nut is screwed into the female threaded hole of the plate nut member;
The bolt is inserted from one side of the building material main body into bolt insertion holes formed in each of the locking fitting and the building material main body, and screwed onto the inner peripheral threaded portion of the insert nut ,
The building material is pin-joined to the building body via the locking fitting attached to the building material body by the bolt, the plate nut member, and the insert nut.
building material. The inner circumference locking means has a helical coil spring portion held by the nut body portion and engaged with the thread groove of the bolt,
A building material according to claim 1 . The inner peripheral plate portion has a contact surface that extends radially outward from the female screw hole and that the bearing surface of the nut body portion contacts .
A building material according to claim 1 or 2 .

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