JP5480014B2 - Floor structure and fixtures - Google Patents

Description

  The present invention relates to a floor structure for fixing a floor plate member made of ALC or the like to a beam member such as a steel frame and a fixture used in the floor structure.

Conventionally, in the connection between a floor plate member and a beam member, for example, as shown in Patent Document 1, a flat floor plate member is placed on a flange of a beam member made of H-shaped steel, and a through hole is formed in the floor plate member. In addition, one shaft portion of the L-shaped fixing jig is inserted into the through hole, and the other shaft portion is positioned below the flange of the beam member, and a nut is placed on the one shaft portion at the upper portion of the floor plate member. A configuration in which the floor plate member and the beam member are sandwiched between the fixing jig and the nut by fastening is known. In such a fixing jig, first, an operator inserts one shaft portion of the fixing jig into the through-hole from below the floor plate member and positions the other shaft portion below the flange, and then, above the floor plate member. There is a problem that the work of turning around and tightening one shaft portion of the fixing jig with a nut is required, and the operator goes down and above the floor plate member, so that the workability is poor.
In order to solve such a problem, it is conceivable that the work on the lower side of the floor board member is left to one worker and the work on the upper side of the floor board member is requested to another worker. This is necessary and not preferable from the viewpoint of cost management. In addition, there is a problem in that this type of fixing method cannot be used when a construction method that does not fit under the floor, such as an extremely small underfloor space, is employed.

  By the way, in Patent Document 2, an attachment hole provided at a predetermined position of an attachment member attached to a beam, and an end portion of the attachment member abuts against a part of the housing when the attachment hole is rotated to prevent rotation. And a bolt inserted non-rotatably into the hole formed in the plate-like piece, the bolt is non-rotatably inserted into the hole of the plate-like piece, and a wall panel is inserted into the bolt. A panel mounting structure is disclosed in which a through-hole is fitted and a nut is fastened to a bolt from the surface side of the wall panel and the wall panel is attached to the housing. It is conceivable to apply the fixing of the floor plate member 1 to the beam member. That is, by making the other end of the fixing jig of Patent Document 1 a plate-like piece and contacting a part of the beam member to prevent rotation, the floor plate member can be removed only from above the floor plate member. It can be fixed to the beam member.

JP 2007-254959 A JP 2004-278680 A

  However, in the configuration of Patent Document 2, since the plate-shaped piece is formed in a flat plate shape, when the configuration of Patent Document 2 is simply applied to the structure of Patent Document 1 as described above, the plate-shaped piece is located below the flange. Since the plate-like piece rotates while rubbing the lower surface of the floor plate member, it is difficult to rotate the plate-like piece with the tightening of the nut, so that the plate-like piece is positioned below the flange. It is conceivable that the bolt is tightened in a state in which the bolt is not tightened, and the bolt may be tightened without fixing the floor plate member to the beam member.

  The present invention has been made to solve such a problem. When the floor board member is installed on the beam member, the floor board member is securely attached to the beam member even when the installation work is performed only from above the floor board member. It aims at providing the floor structure which can be fixed to a member, and the fixing tool used for this floor structure.

  (1) A floor structure according to the present invention includes a beam member, a floor plate member placed on the beam member, and a fixture for fixing the floor plate member to the beam member, and the beam member includes the floor plate. A flange that receives the member; and a web that is suspended from the flange. The floor plate member is provided with a through-hole penetrating the front and back at a position that does not overlap the flange. In a state where the main shaft portion is formed in a shaft shape inserted into the hole and has a male screw portion tightened on the nut on the surface side of the floor plate member at the upper end portion, and at least the floor plate member is placed on the beam member The flange extends from the through hole to the web of the beam member in the radially outward direction of the main shaft portion and reaches below the flange, and the flange is connected to the floor plate as the nut is tightened into the main shaft portion. Side to be crimped to the member And an angle formed between the main shaft portion and the horizontal shaft portion is formed as an acute angle, and the horizontal shaft portion is separated from the beam member and the floor plate member except for a tip portion that contacts a flange of the beam member. It is characterized by being.

In implementing the floor structure having the above-described configuration, the main shaft portion of the fixture is inserted into the through hole of the floor plate member, and the floor member is temporarily tightened with the male screw portion and the nut of the main shaft portion protruding on the floor plate member. By placing the nut on the beam member and then tightening the nut, the fixture is rotated along with the rotation of the nut, and the horizontal axis portion eventually goes below the flange of the beam member, and the tip is the web. The contact is stopped and the rotation is stopped.
After that, by further tightening the nut, only the nut rotates with respect to the main shaft portion of the fixing tool, whereby the nut is tightened into the male screw portion of the fixing tool. The horizontal axis portion presses the flange of the beam member toward the floor plate member. As a result, the beam member is pressure-bonded to the floor plate member, whereby the floor plate member is fixed to the beam member.

In such a process, the horizontal shaft portion of the fixture is formed in a horned shape with respect to the main shaft portion. Therefore, in the nut tightening step, the fixture has a horizontal shaft portion that contacts the flange of the beam member. Since it is separated from the beam member and floor plate member except for the tip, there is no risk of friction between the fixture and these beam member and floor plate member, and the fixture is easily provided at the initial stage of tightening the nut. Thus, the horizontal shaft portion can be surely turned below the flange of the beam member and brought into contact with the web to complete the rotation.
Accordingly, in the floor structure configured as described above, the floor plate member can be reliably fixed to the beam member even when the mounting operation is performed only from above the floor plate member.

 In addition, the fixing tool is formed with an acute angle between the horizontal shaft portion and the main shaft portion, and the base end portion of the horizontal shaft portion is separated from the lower surface of the floor plate member while being inserted through the through hole. When the main shaft portion is bent to form the horizontal shaft portion, the bending rate of the bending can be increased, and the main shaft portion can be easily formed. Further, even when the horizontal shaft portion is formed by welding joining to the main shaft portion, the surplus portion of the welded portion can be formed in contact with the floor plate member, and only a fixture can be easily formed. Even if it is such a fixing tool, a contact with a floor board member can be suppressed as much as possible.

  (2) Moreover, it is preferable that the upper end of the said main-shaft part is provided with the judgment means which can judge the position of the front-end | tip part of the said horizontal axis part. Even when the horizontal shaft portion is located below the floor plate member, the judgment means can easily confirm the position of the tip of the horizontal shaft portion from above the floor plate member, and the nut to the main shaft portion can be confirmed. It is possible to easily determine whether or not final fastening is possible.

(3) Further, a seat carved portion for accommodating the nut is recessed on the upper surface of the floor plate member, and the male screw portion formed on the main shaft portion of the fixture is deeper than the seat carved portion. It is preferable that the maximum length is formed at the tip of the main shaft portion.
According to this, even if the nut is tightened to the maximum extent to the main shaft portion of the fixture, the upper end portion of the main shaft portion is located in the seat carved portion and does not protrude above the upper surface of the floor plate member, It becomes possible to maintain the flatness of the floor plate member surface. Further, when the nut is tightened to the maximum, the lower surface of the nut comes into contact with the main shaft portion, whereby not only a sufficient tightening torque is obtained, but also excessive tightening of the nut is prevented. Thereby, it is possible to prevent an excessive clamping force accompanying the tightening of the nut from being generated between the nut and the distal end portion of the horizontal shaft portion.

(4) Moreover, it is preferable that the sleeve which protects an inner peripheral wall surface is inserted by the through-hole of the said floor board member. By providing the sleeve in the through hole, the pressing force by the main shaft portion is received by the sleeve, thereby preventing the inner wall of the through hole from being damaged.

(5) Moreover, it is preferable that the said nut is provided with the collar part which protects the upper surface of the said floor board member. According to this, the contact area between the nut and the floor plate member will be expanded, and the pressing force accompanying the tightening of the nut will be dispersed by the amount of the collar portion, and as a result, damage to the floor plate member can be prevented. it can.

(6) Moreover, it is preferable that a washer formed at least wider than the outer diameter of the nut is provided between the nut and the floor plate member.
According to this, even if the floor plate member receives an excessive pressing force between the nut and the floor plate member as the nut is tightened, a washer having a contact area larger than that of the nut is provided between them. The pressure is weakened and transmitted to the floor board member, thereby preventing damage to the floor board member.

(7) Moreover, it is preferable that the front-end | tip part which contact | connects the web and flange of the said beam member is formed in the projecting circular arc shape at the horizontal axis part of the said fixture.
According to this, the distal end portion of the horizontal shaft portion of the fixture comes into contact with the flange of the beam member in a dotted manner, and the contact area is made as small as possible and the frictional force is hardly generated. It is possible to satisfactorily generate the rotation of the fixture accompanying the tightening of the. In addition, since the projecting arc-shaped portion comes into contact with the web and the flange, even if the tip of the horizontal shaft portion rubs the surface of the web or the flange with tightening, these surfaces are scratched. It is possible to suppress entering.

(8) Further, it is preferable that the horizontal shaft portion of the fixture is plastically deformed in a direction away from the main shaft portion by receiving a predetermined pressing force at a tip portion in contact with the flange of the beam member.
According to this, the fixture is plastically deformed as the nut is tightened, and not only can the tightening force by the nut be increased, but also the horizontal shaft portion is not only the tip portion but also the predetermined portion from the tip portion. Surface contact is made with the flange of the beam member over a range, and the fixing of the floor plate member to the beam member by the fixture can be further strengthened.

  (9) Moreover, the fixing tool concerning this invention is a fixing tool which fixes the floor board member mounted on the flange of a beam member provided with a flange and the web suspended from this flange to the said beam member. A main shaft portion having a male screw portion formed at an upper end portion, which is formed in a shaft shape and inserted into a through hole formed in the floor plate member, and is fastened to a nut on the floor plate member, and at least the floor plate member is the beam member In the state of being placed on the top, it extends in the radially outward direction of the main shaft portion, which is larger than the length from the through hole to the web of the beam member, and reaches the lower side of the flange. And a horizontal axis part for pressing the flange to the floor plate member, and an angle formed between the main axis part and the horizontal axis part is formed at an acute angle.

In the fixture having the above-described configuration, the horizontal shaft portion is formed in an angular shape with the main shaft portion. Therefore, in the nut tightening step, the beam member and the beam member except for the tip portion that contacts the flange of the beam member Since it is separated from the floor plate member, there is no risk of friction between the fixture and these beam members and floor plate members, and the fixture can be easily turned around at the initial stage of tightening the nut. Can be reliably wound around the flange of the beam member and brought into contact with the web to finish the rotation. After that, by further tightening the nut, only the nut rotates with respect to the main shaft portion of the fixing tool, whereby the nut is tightened into the male screw portion of the fixing tool, and accordingly the horizontal axis of the fixing tool. The part presses the flange of the beam member toward the floor plate member. As a result, the beam member is pressure-bonded to the floor plate member, whereby the floor plate member is fixed to the beam member.
Therefore, by using the fixture having the above-described configuration, the floor plate member can be reliably fixed to the beam member even when the mounting operation is performed only from above the floor plate member.

 In addition, the fixing tool is formed with an acute angle between the horizontal shaft portion and the main shaft portion, and the base end portion of the horizontal shaft portion is separated from the lower surface of the floor plate member while being inserted through the through hole. When the main shaft portion is bent to form the horizontal shaft portion, the bending rate of the bending can be increased, and the main shaft portion can be easily formed. Further, even when the horizontal shaft portion is formed by welding joining to the main shaft portion, the surplus portion of the welded portion can be formed in contact with the floor plate member, and only a fixture can be easily formed. Even if it is such a fixing tool, a contact with a floor board member can be suppressed as much as possible.

  According to the floor structure and the fixture used for the floor structure according to the present invention, when the floor board member is installed on the beam member, an appropriate holding force is imparted even when the installation work is performed only from above the floor board member. Thus, the floor plate member can be reliably fixed to the beam member.

It is a longitudinal section of the floor structure concerning one embodiment of the present invention. It is a figure explaining the fixing tool concerning one embodiment of the present invention. It is a figure explaining the enforcement method of the floor structure by the fixing tool concerning one Embodiment of this invention. It is the figure which looked at the floor structure of Drawing 3 from the plane direction of a floor board member. It is sectional drawing of the floor structure concerning another embodiment of this invention.

A Floor structure 1 Beam member 2 Floor plate member 3 Fixing tool 4 Nut 5 Flange 6 Web 7 Heat insulating material 8 Through hole 9 Seat carved portion 10 Main shaft portion 11 Horizontal shaft portion 12 Male screw portion 13 Tip portion 14 Judging means 15 Hook portion 16 Washer 17 sleeve

 Hereinafter, the floor structure and the fixture according to the present invention will be described in detail based on the embodiments. However, these embodiments are described in order to help understanding of the present invention, and the present invention has been described. It is obvious that the present invention is not limited to the embodiment.

  As shown in FIG. 1, a floor structure A according to the present embodiment includes a beam member 1, a floor plate member 2 placed on the beam member 1, and a fixture for fixing the floor plate member 2 to the beam member 1. 3 and a nut 4 that is screwed into the fixture 3.

The beam member 1 is formed of H-shaped steel, and includes a flange 5 that receives the floor plate member 2 and a web 6 that is suspended from the flange 5.
A heat insulating material 7 is installed outside the beam member 1. Thereby, the lower part of the floor board member 2 is surrounded by the heat insulating material 7, and the under floor space below the floor board member 2 can be maintained in a thermal environment close to the living space above the floor board member 2.

  Further, the floor plate member 2 is formed in a flat plate shape made of ALC (Autoclaved Light-weight Concrete), and the peripheral portion is placed on the flange 4 of the beam member 1 so that the beam member 1 It is to be supported. Further, the floor plate member 2 is provided with a through hole 8 penetrating the front and back at a position where the floor plate member 2 is placed on the flange 4 of the beam member 1 and does not overlap the flange 4. Further, on the surface side of the floor plate member 2, a seat carved portion 9 is recessed at a position that becomes the peripheral edge portion of the through hole 8.

  The fixture 3 is a member that fastens and fixes the floor plate member 2 placed on the beam member 1 to the beam member 1, and as shown in FIGS. 1 and 2A, the through hole of the floor plate member 2 is provided. 8 is formed by bending a linear shaft member such as a reinforcing bar having a diameter through which the main shaft portion 10 can be inserted. The main shaft portion 10 is bent from the lower end portion of the main shaft portion 10 to be out of the diameter of the main shaft portion 10. And a horizontal axis portion 11 extending in the direction. Further, bending is performed so that the angle θ formed between the main shaft portion 10 and the horizontal shaft portion 11 becomes an acute angle. Alternatively, the main shaft portion 10 and the horizontal shaft portion 11 may be formed separately and integrated by welding or the like. In this case, although the horizontal axis part 11 may be constituted by a flat plate-like member, the angle θ between the horizontal axis part 11 and the main axis part 10 needs to be an acute angle.

  A male screw portion 12 is formed on the upper end portion of the main shaft portion 10. The length of the male screw portion 12 is the same as or slightly smaller than the depth of the seat carved portion 9 formed in the floor board member 2. Thus, even if the nut 4 is tightened to the maximum extent with respect to the main shaft portion 10 of the fixture 3, the upper end portion of the main shaft portion 10 is located in the seat carved portion 9 and protrudes above the upper surface of the floor board member 2. Without this, the flatness of the surface of the floor board member 2 can be maintained.

  Further, a marking (determination means) 14 capable of determining the position of the distal end portion 13 of the horizontal shaft portion 11 is provided at the upper end of the main shaft portion 10. With the marking 14, the position of the distal end portion 13 of the horizontal shaft portion 11 can be easily confirmed, and it can be easily determined whether or not the nut 4 can be finally tightened to the main shaft portion 10. As illustrated in FIG. 2B, the marking 14 is preferably formed on the upper surface of the main shaft portion 10, and the upper surface of the floor plate member 2 even when the fixture 3 is attached to the floor plate member 2. As long as the direction of the front end portion of the horizontal axis portion 11 can be determined from the portion, any configuration may be used.

  The horizontal shaft portion 11 is bent and extended from the distal end portion 13 of the main shaft portion 10 so that the angle θ formed with the main shaft portion 10 is an acute angle. As shown in FIG. 2, the length L from the main shaft portion 10 to the tip portion 13 of the horizontal shaft portion 11 is at least the through hole 8 in a state where the floor board member 2 is placed on the flange 5 of the beam member 1. To the web 6 of the beam member.

  Further, the horizontal axis portion 11 is formed with a tip portion 13 in contact with the flange 5 of the beam in a curved shape. By forming the distal end portion 13 in a curved surface shape, the distal end portion 13 of the horizontal shaft portion 11 comes into contact with the flange 5 of the beam member 1 in a dotted manner, and the contact area is made as small as possible and generation of frictional force occurs. Since this is difficult, the rotation of the fixture 3 accompanying the tightening of the nut 4 can be generated satisfactorily.

  In addition, the fixture 3 has a length of the main shaft portion 10 inserted through the through hole 8 of the floor plate member 2 and the distal end portion 13 of the horizontal shaft portion 11 in a state where the nut 4 is tightened to the lowermost portion of the male screw portion 12. The distance between the floor plate members 2 is set to a length that is the same as or slightly smaller than the thickness of the flange 5 of the beam member 1. As a result, the fixture 3 does not come into contact with the back surface of the floor plate member 2 or the web 6 of the beam member 1 except for the tip portion 13 of the horizontal shaft portion 11, thereby providing the fixture 3 by screwing the nut 4. This makes it possible to generate good rotation.

  Further, as shown in FIG. 1, the nut 4 that is screwed into the male screw portion 12 of the main shaft portion 10 of the fixture 3 is provided with a flange portion 15 that protects the upper surface of the floor plate member 2. As a result, the contact area between the nut 4 and the floor board member 2 is increased, and the pressing force associated with the tightening of the nut 4 is dispersed by the amount of the flange portion 15. As a result, damage to the floor board member 2 is prevented. can do.

Further, a washer 16 having a larger contact area with the floor plate member 2 than at least the nut 4 is provided between the nut 4 and the floor plate member 2.
Even if the floor plate member 2 receives an excessive pressing force between the nut 4 and the floor board member 2 as the nut 4 is tightened by the washer 16, the contact area between the nut 4 and the nut 4 is larger than the nut 4. Since the washer 16 is provided, the pressing force is dispersed and transmitted to the floor board member 2, thereby preventing the floor board member 2 from being damaged when the nut 7 is tightened.

  Moreover, as shown in FIG. 1, the sleeve 17 which protects an inner peripheral wall surface is inserted by the through-hole 8 of the floor board member 2. As shown in FIG. Further, the sleeve 17 may be a simple cylindrical member, but in the present embodiment, as shown in FIG. 1, a hook is formed at one end facing the nut 4 in order to hold the floor plate member 2. Is provided.

  When the nut 4 is finally tightened with respect to the main shaft portion 10 with the distal end portion 13 of the horizontal shaft portion 11 of the fixture 3 being in contact with the flange 5 of the beam member 1, the horizontal shaft portion 11 is used as a fulcrum. It is conceivable that an axial deviation in which the main shaft portion 10 is inclined in the through hole 8 occurs. Since the floor plate member 2 uses ALC having a compression strength of 3 to 5 N / mm 2 and a strength against compression that is not so high, the main shaft portion 10 is in point contact or line contact with the inner wall in the through hole 8 due to the shaft misalignment. If the inner wall is pressed with a large load in this state, it is conceivable that the inner peripheral wall of the through hole 8 is damaged accordingly. On the other hand, by providing the sleeve 17 in the through hole 8, the pressing force by the main shaft portion 10 is received by the sleeve 17, thereby preventing damage to the inner wall of the through hole 8. Further, since the main shaft portion 10 is inserted into the sleeve 17, the posture of the main shaft portion 10 is corrected by the sleeve 17, and the occurrence and progress of the above-described shaft misalignment is suppressed as much as possible. .

  Next, the enforcement method of the floor structure A which concerns on this invention is demonstrated using FIG.

1. First, as shown in FIG. 3A, the main shaft portion 10 of the fixture 3 is inserted into the through hole 8 from the back surface side of the floor plate member 2, and the male screw portion 12 of the main shaft portion 10 is placed on the front surface side of the floor plate member 2. The nut 4 is temporarily tightened to the male screw portion 12 so as to be exposed. At this stage, since the nut 4 is temporarily tightened, the fixture 3 is freely rotated around the axis of the main shaft portion 10. Moreover, the space | interval between the front-end | tip part 13 of the fixing tool 3 in this state and the back surface of the floor board member 2 will be set more than the thickness of the flange 5 of the beam member 1 at least. After the fixture 3 is attached to the floor board member 2 in this way, the floor board member 2 is placed on the beam member 1.
4A is a view of the state in which the floor plate member 2 is placed on the beam member 1 as viewed from the upper surface direction of the floor plate member 2, and the horizontal axis portion 10 of the fixture 3 does not contact the beam member 1. FIG. Located in the direction.

2. After placing the floor board member 2 on the beam member 1, the nut 4 is rotated in a tightening direction, and the nut 4 is finally tightened. Thereby, the fixture 3 rotates with the nut 4, and the front-end | tip part 13 of the horizontal shaft part 11 contact | abuts to the web 6 (FIG.3 (b) and FIG.4 (b)). At this time, it can be reliably determined by the determination means 14 whether or not the front end portion 13 is in contact with the web 6.
In this state, it is preferable that the distance between the distal end portion 13 of the horizontal shaft portion 11 and the lower portion of the flange 5 is about 1 to 5 mm.

3. By further tightening the nut 4, the distal end portion 13 of the horizontal shaft portion 11 comes into contact with the lower surface of the flange 5, and then the final tightening is continued thereafter, so that the distal end portion 13 of the horizontal shaft portion 11 becomes the beam member. 1 flange 5 is pressed, whereby the flange 5 is pressed against the floor member 2 (FIG. 3C). In this way, the floor plate member 2 and the flange 5 of the beam member 1 are fastened by the fixture 3 and the nut 4 to complete the construction.
From the state of FIG. 3B to the state of FIG. 3C, the horizontal shaft portion 11 is in contact with the web 6 as shown in FIG. 4B.

As described above, when the floor structure A according to the present embodiment is constructed, the nut 4 is tightened because the horizontal shaft portion 11 of the fixture 3 is formed in an angular shape with the main shaft portion 10. In the process, since the fixture 3 is separated from the beam member 1 and the floor plate member 2 except for the tip portion 13 of the horizontal shaft portion 11 that contacts the flange 5 of the beam member 1, the fixture 3 and these beam members 1 and There is no possibility that a frictional force is generated between the floor plate member 2 and the fixing member 3 is easily turned around at the initial stage of tightening of the nut 4, so that the horizontal shaft portion 11 is surely placed below the flange 5 of the beam member 1. It is possible to end the rotation by bringing it into contact with the web 6.
Therefore, in the floor structure A having the above configuration, the floor plate member 2 can be reliably fixed to the beam member 1 even when the mounting operation is performed only from above the floor plate member 2.

  Further, since the angle θ formed between the main shaft portion 10 and the horizontal shaft portion 11 of the fixture 3 is an acute angle, the reaction force acting on the horizontal shaft portion 11 when the horizontal shaft portion 11 presses the flange 5 is reduced. A part flows in the radial direction of the main shaft portion 10, thereby reducing the moment acting on the horizontal shaft portion 11 and suppressing the deformation of the horizontal shaft portion 11 due to the application of torque accompanying tightening of the nut 4. Is possible.

 As described above, the fixture 3 has an acute angle θ formed between the horizontal shaft portion 11 and the main shaft portion 10, and is inserted into the through hole 8, so that the proximal end of the horizontal shaft portion 11 is formed. Since the portion is separated from the lower surface of the floor plate member 2, when the main shaft portion 10 is bent to form the horizontal shaft portion 11, it is possible to increase the bending curvature of the bending and easily form it. It becomes. Further, even when the horizontal shaft portion 11 is formed on the main shaft portion 10 by welding joining, the surplus portion of the welded portion can be formed in contact with the floor plate member 2, and the fixture 3 can be easily formed. Not only does this occur, but even the fixture 3 can suppress contact with the floor board member 2 as much as possible.

  Further, in the configuration in which the main shaft portion 10 is bent to form the horizontal shaft portion 11 as in the present embodiment, the rigidity of the bent portion is remarkably increased. When the length of the main shaft portion 10 or the angle θ formed between the horizontal shaft portion 11 and the main shaft portion 10 is adjusted by using such a property, as shown in FIG. As a result, the main shaft portion 10 rises, and the distal end portion 13 presses the upper flange while the middle shaft portion is elastically deformed from the base end of the horizontal shaft portion 11. Thereby, a load always acts on the flange 5 from the fixing tool 3 via the elastic deformation portion of the horizontal shaft portion 11, and not only can the flange and the floor plate member be sandwiched with an appropriate load, The elastic deformation portion functions as a device that absorbs shock and vibration, and the fixed state by the fixing tool 3 is maintained over a long period of time.

  As described above, according to the present embodiment, when the floor board member 2 is installed on the beam member 1, even when the mounting work is performed only from above the floor board member 2, it is ensured by applying an appropriate holding force. The floor plate member 2 is fixed to the beam member 1.

  In addition, since determination means 14 capable of determining the position of the distal end portion 13 of the horizontal shaft portion 11 is provided at the upper end of the main shaft portion 10, the horizontal shaft portion 11 is positioned below the floor plate member 2 by the determination means 14. Even if it is located, the position of the front-end | tip part 13 of the horizontal shaft part 11 can be easily confirmed from the upper part of the floor board member 2, and it is easily judged whether the nut 4 can be finally tightened to the main shaft part 10. Will be.

  Moreover, since the seat carved part 9 for accommodating the nut 4 is recessedly provided on the upper surface of the floor plate member 2, even if the nut 4 is tightened to the main shaft part 10 of the fixture 3 to the maximum, The upper end portion of the main shaft portion 10 is located in the seat carving portion 9 and does not protrude above the upper surface of the floor plate member 2, and the upper end portion of the fixture is prevented from protruding beyond the surface of the floor plate member 2. The flatness of the surface of the floor board member 2 is maintained. Further, when the nut 4 is tightened to the maximum, the lower surface of the nut 4 comes into contact with the main shaft portion 10, thereby not only obtaining a sufficient tightening torque but also preventing excessive tightening of the nut 4. Become. Thereby, generation | occurrence | production of the excessive clamping force accompanying the fastening of the said nut 4 is avoided.

  Further, since a sleeve 17 that protects the inner peripheral wall surface is fitted into the through hole 8 of the floor plate member 2, the pressing force by the main shaft portion 10 is received by the sleeve 17, thereby the inner wall of the through hole 8. Can prevent damage.

  Further, since the flange 4 that protects the upper surface of the floor plate member 2 is provided on the nut 4, the contact area between the nut 4 and the floor plate member 2 is increased, and the pressing force associated with the tightening of the nut 4 is less As a result, the floor plate member 2 is prevented from being damaged when the nut 4 is tightened.

  In addition, since a washer 16 formed wider than at least the outer diameter of the nut 4 is provided between the nut 4 and the floor board member 2, the nut 4 and the floor board member 2 are tightened as the nut 4 is tightened. Even if an excessive pressing force is received by the floor plate member 2 between them, a washer having a larger contact area than the nut 4 is provided between them, so that the pressing force is dispersed and transmitted to the floor plate member 2, This also prevents the floor plate member 2 from being damaged.

  Further, the tip 13 of the horizontal shaft 11 of the fixture 3 is formed in a protruding arc shape so that the horizontal shaft 11 of the fixture 3 contacts the web 6 and the flange 5 of the beam member 1. Since the contact with the flange 5 of the beam member 1 is made in a point-like manner, the contact area becomes as small as possible and the frictional force is hardly generated. It will occur well. Further, since the projecting arc-shaped portion comes into contact with the web 6 and the flange 5, even when the tip portion 13 of the horizontal shaft portion 11 rubs the surface of the web 6 or the flange 5 with tightening, It is possible to suppress the surface from being scratched.

 As mentioned above, although especially preferable embodiment of this invention was described, this invention is not limited to this embodiment, It is possible to implement in various deformation | transformation aspects.

  For example, as shown in FIG. 5, by adjusting the composition of the bar forming the fixture 3, the nut 4 is further tightened after the nut 4 is finally tightened, and a predetermined pressing force is applied to the distal end portion 13 of the horizontal shaft portion 11. It is also possible to employ the fixture 3 that plastically deforms the horizontal shaft portion 11 in the direction away from the main shaft portion 10 by applying the above. In the case of such a fixture 3, the above 3. When the nut 4 is further tightened after the above step, the load acting on the tip portion 13 reaches the predetermined pressing force, and accordingly, the horizontal shaft portion 11 of the fixture 3 is separated from the main shaft portion 10. While being deformed in the direction, not only the distal end portion 13 but also the middle portion from the distal end portion 13 toward the proximal end portion is in contact with the web 6 of the beam member 1, and the horizontal shaft portion 11 is in line contact with the web 6 of the beam member 1. In this state, the beam member 1 and the floor board member 2 are held between the fixture 3 and the nut 4.

 Moreover, this embodiment can be adopted not only for fixing the floor member of the first floor, but also for fixing the floor members of other floors such as the second floor and the R floor.

Claims (9)

A beam member, a floor plate member placed on the beam member, and a fixture for fixing the floor plate member to the beam member,
The beam member includes a flange that receives the floor board member, and a web that is suspended from the flange.
The floor plate member is provided with a through hole penetrating the front and back at a position that does not overlap the flange,
The fixing member is formed in a shaft shape that is inserted into the through hole, and a main shaft portion that includes a male screw portion that is fastened to a nut on the floor plate member surface side at an upper end portion;
At least the floor plate member is placed on the beam member, and extends in a radially outward direction of the main shaft portion larger than the length from the through hole to the web of the beam member, and reaches the lower side of the flange. A horizontal shaft portion that crimps the flange to the floor plate member in accordance with tightening of the nut with respect to the portion,
An angle formed between the main shaft portion and the horizontal shaft portion is formed as an acute angle, and the horizontal shaft portion is separated from the beam member and the floor plate member except for a front end portion in contact with a flange of the beam member. Floor structure.   The floor structure according to claim 1, wherein a determination unit capable of determining a position of a tip end portion of the horizontal shaft portion is provided at an upper end of the main shaft portion. On the upper surface of the floor plate member, a seat carved portion for accommodating a nut is recessed,
The male screw portion formed on the main shaft portion of the fixture is formed at the tip portion of the main shaft portion with the depth of the seat carved portion being the maximum. Floor structure.   The floor structure according to any one of claims 1 to 3, wherein a sleeve that protects an inner peripheral wall surface is fitted into the through hole of the floor plate member.   The floor structure according to any one of claims 1 to 4, wherein the nut is provided with a flange portion that protects an upper surface of the floor board member.   The floor structure according to any one of claims 1 to 5, wherein a washer formed at least wider than an outer diameter of the nut is provided between the nut and the floor plate member. .   The floor structure according to any one of claims 1 to 6, wherein the horizontal shaft portion of the fixing member has a protruding arc shape at a tip portion that contacts the flange of the beam.   The horizontal shaft portion of the fixture is plastically deformed in a direction away from the main shaft portion by receiving a predetermined pressing force at a tip portion in contact with the flange of the beam. The floor structure according to any one of the above. A fixture for fixing a floor plate member placed on a flange of a beam member comprising a flange and a web depending from the flange to the beam member,
A main shaft portion that is formed in a shaft shape inserted into a through hole formed in the floor plate member and has a male screw portion that is fastened to a nut on the floor plate member at an upper end portion;
At least the floor plate member is placed on the beam member, and extends in a radially outward direction of the main shaft portion larger than the length from the through hole to the web of the beam member, and reaches the lower side of the flange. A horizontal shaft portion that crimps the flange to the floor plate member along with tightening of the nut to the portion,
A fixing tool, wherein an angle formed between the main shaft portion and the horizontal shaft portion is formed as an acute angle.