JP2020193496A - Floor panel fastening structure, and floor panel bolt-fastening method - Google Patents

Abstract

To provide a floor panel fastening structure capable of improving freedom in floor panel dimension, improving work safety, and suppressing construction period and cost, by making fastening by a work from one side of an upper and lower sides of a floor panel possible.SOLUTION: A floor panel fastening structure fastens a floor panel 20 to a floor beam 12 as a building skeleton using a bolt 30 inserted into the floor panel 20 and a nut 34 engaged with a screw portion 33 of the bolt 30, and comprises: a bolt through hole 21 formed so as to vertically penetrate the floor panel 20 and making the screw portion 33 of the bolt 30 penetrate; and a buckling hole 22 formed so as to store a head portion 31 of the bolt 30 at one end in an axial direction of the bolt through hole 21. Between the buckling hole 22 and the head portion 31 of the bolt 30, there is provided a rotation restriction structure restricting rotation of the head portion 31.SELECTED DRAWING: Figure 2

Description

The present invention relates to a floor panel fastening structure and a floor panel bolt fastening method.

Conventionally, a floor panel in which both ends in the longitudinal direction are fixed to a floor beam by using bolts is known (see, for example, Patent Document 1). In this conventional technique, a stud bolt fixed to a floor beam is inserted into a through hole of a floor panel, and a nut is fastened to the stud bolt to fix the floor panel to the floor beam.
Further, when fixing the floor panel to the floor beam, instead of the stud bolt, a bolt is penetrated from above the floor panel and fastened to the floor beam.

JP-A-2009-102832

However, when a stud bolt is used as in Patent Document 1, the floor panel is transported so as to penetrate the stud bolt provided in the floor beam in an upright state through the bolt through hole formed through the floor panel. Is difficult and time-consuming. That is, when transporting the floor panel onto the floor beam of the building, it is common to tie the floor panel to the floor panel with a wire or the like and lift the floor panel with a lifting device. In this case, since a gap is required to remove the string hung on the floor panel, temporarily place the stud bolt in a position shifted from the regular installation position where the stud bolt is inserted into the bolt through hole, remove the wire, etc., and then regular. It will be manually moved to the installation position of. Therefore, the work is troublesome, and the construction period and cost increase.

On the other hand, when the floor panel is transported to the proper installation position and then the bolt is passed through the floor panel and fastened to the floor beam, the following problems occur.
That is, as shown in FIG. 7, when the worker 01 rotates the head of the bolt 03 on the upper side of the floor panel 02 and fastens it to the skeleton such as the floor beam 04, it is necessary to stop the nut from being carried around by the bolt. There is. In this case, when the worker 01 performs the fastening work by himself / herself, he / she turns his / her hand to the lower surface of the floor panel 02 as shown to stop the nut from being carried around to the bolt.
Therefore, when the bolt 03 is provided in the center of the floor panel 02 in the width direction, the installation position of the bolt 03 is limited to the position where the worker 01 can turn his / her hand as described above, and the width of the floor panel 02 is limited. The dimensions are limited to a size that is within reach of the center. Moreover, at the time of this fastening work, the worker 01 leans out from the floor panel 02 as shown in the drawing, and especially when the floor panel 02 is laid on the second floor or the third floor, the safety of the worker 01 Means to ensure sex are needed.

Further, in order to solve the above problem, the workers 01 and 01 are arranged on both the upper side and the lower side of the floor panel 02, and two people work together. However, in this case, the required manpower increases, and in addition, the work is performed while coordinating the start and end of the fastening operation on the upper floor and the lower floor, which requires labor and time, and the construction period and It leads to an increase in cost.

The present disclosure has focused on the above-mentioned conventional problems, and by enabling bolts to be fastened by working from one side of the floor panel, it is possible to improve the degree of freedom in the dimensions of the floor panel and also to improve the degree of freedom in dimensions. It is an object of the present invention to provide a floor panel fastening structure and a floor panel bolt fastening method capable of enhancing work safety and suppressing the construction period and cost.

In order to achieve the above object, the floor panel fastening structure of the present disclosure is a floor in which the floor panel is fastened to the building frame by using a bolt inserted into the floor panel and a nut engaged with a screw portion of the bolt. It is a panel fastening structure, and is formed by penetrating the floor panel vertically and vertically, and can accommodate the head of the bolt at one end in the axial direction of the bolt through hole through which the screw portion of the bolt is penetrated. A floor panel fastening structure is provided between the counterbore hole and the head of the bolt, which is provided with a rotation restricting structure for restricting the rotation of the head.

In addition, the floor panel bolt fastening method of the present disclosure performs the following steps.
The head and the washer are arranged in the counterbore hole, the screw portion of the bolt is passed through the bolt through hole of the floor panel, and the fixing plate is formed in the screw portion protruding downward of the floor panel. After mounting the nut, the nut is mounted on the screw portion from the lower side of the fixing plate, and the fixing plate is further arranged at the non-engaging position.
A step of arranging the floor panel at a predetermined installation position of the skeleton.
The fixing plate is rotated from the lower side of the floor panel to the engaging position with respect to the screw portion, and further, the nut is rotated in the fastening direction to rotate the outer circumference of the washer and the inner circumference of the counterbore hole. A step of fixing the floor panel to the skeleton by fastening the floor panel while restricting the rotation of the head.

In the floor panel fastening structure and the floor panel bolt fastening method of the present disclosure, it is possible to fasten bolts by working from one of the upper and lower sides of the floor panel, which can improve the degree of freedom in the dimensions of the floor panel and improve work safety. It can be increased, and the construction period and cost can be suppressed.

FIG. 5 is a perspective view showing a state in which the floor panel 20 of the first embodiment is bridged over the floor beams 12 and 12. It is sectional drawing which shows the main part of the floor panel 20 used for the floor panel fastening structure of Embodiment 1. FIG. It is explanatory drawing of the eccentricity amount of the washer 32 in the bolt 30 used for the floor panel fastening structure of Embodiment 1. FIG. It is explanatory drawing which shows the relationship between the washer 32 and the counterbore hole 22 in the floor panel fastening structure of Embodiment 1. FIG. It is explanatory drawing which shows the relationship between the washer 32 and the counterbore hole 22 in the floor panel fastening structure of Embodiment 1. FIG. It is a perspective view which shows the time of transportation of the floor panel 20 in the floor panel fastening structure of Embodiment 1. FIG. It is explanatory drawing of the state which carried the floor panel 20 to which the floor panel fastening structure of Embodiment 1 is applied to the predetermined installation position of the floor beam 12. FIG. 5 is an explanatory view of a state in which the hanging metal fitting 50 is removed from the floor panel 20 to which the floor panel fastening structure of the first embodiment is applied, and the head portion 31 and the washer 32 of the bolt 30 have entered the counterbore hole 22. It is explanatory drawing of the state in which the bolt 30 is fastened by the floor panel fastening structure of Embodiment 1 and the floor panel 20 is fixed to a floor beam 12. It is explanatory drawing of the solution problem of the floor panel fastening structure of Embodiment 1. FIG.

Hereinafter, embodiments for realizing the floor panel fastening structure and the floor panel bolt fastening method according to the present disclosure will be described with reference to the drawings.
The floor panel fastening structure and the floor panel bolt fastening method of the first embodiment are used for fixing the floor panel 20 forming the floor FL of the building 1 shown in FIG.

The floor panel 20 is installed so as to be bridged over the floor beams 12 and 12 of the building 1. As the floor beam 12, channel steel or the like can be used, and in the first embodiment, H-shaped steel having an upper flange 12a and a lower flange 12b is used.

(Explanation of fixed structure of floor panel)
Next, a structure for fixing the floor panel 20 to the floor beam 12 will be described.
As shown in FIG. 1, the floor panel 20 is formed in a rectangular plate shape having a length that can be bridged over the floor beams 12 and 12, and a plurality of floor panels 20 are arranged in parallel along the floor beam 12 to form a floor FL. It is formed. The floor panel 20 is formed with bolt through holes 21 for vertically penetrating the screw portions 33 of the bolt 30 shown in FIG. 2 at both ends in the longitudinal direction. The material of the floor panel 20 is not particularly limited, and known materials such as precast concrete panels and wood-based panels can be used. In the first embodiment, a lightweight cellular concrete panel (ALC panel) is used as the floor panel 20.

The bolt through hole 21 is arranged so as to be located inside the upper flange 12a of the floor beam 12 when it is bridged over the floor beams 12 and 12 in the longitudinal direction of the floor panel 20. Further, it is arranged in the center of the floor panel 20 in the width direction orthogonal to the longitudinal direction of the floor panel 20 (see FIG. 1). Further, a concave counterbore hole 22 capable of accommodating the head portion 31 of the bolt 30 and the washer 32, which will be described later, is formed at the upper end of the bolt through hole 21.

The counterbore hole 22 and the bolt through hole 21 are formed in a circular shape when viewed from above as shown in FIGS. 4A and 4B, and further, as shown in FIG. 2, the central axis c22 of the counterbore hole 22 is a bolt. The through hole 21 is formed so as to be displaced from the central axis c21 in the direction orthogonal to the axis, that is, eccentric. Specifically, the counterbore hole 22 has a diameter of about 60 mm and a depth of about 10 mm, and the bolt through hole 21 has a diameter of about 15 mm, and its central axis is about 7 mm from the central axis of the counterbore hole 22. They are arranged in a staggered manner. Further, the counterbore hole 22 is formed to have a depth larger than the vertical dimension obtained by adding the head portion 31 of the bolt 30 and the washer 32, which will be described later.

The floor panel 20 is fixed to the floor beam 12 by a bolt 30 inserted through the bolt through hole 21 and a fixing plate 40 and a nut 34 supported at the lower end of the bolt 30. The details will be described.
As shown in FIG. 3, the bolt 30 is provided with a donut disk-shaped washer 32 having a hole 32a opened inside under the hexagonal head 31. The washer 32 is fixed to one or both of the head 31 and the screw portion 33 by welding. The head 31 and the screw portion 33 are coaxially formed as the central axis c30 of the bolt 30, whereas the washer 32 has its central axis c32 in a direction orthogonal to the central axis c30 of the bolt 30. They are arranged in a staggered manner. Specifically, the screw portion 33 has a diameter of about 10 mm, the washer 32 has an outer diameter of about 50 mm, and the inner diameter of the inner hole 32a is about 15 mm. Then, the inner peripheral surface of the hole 32a of the washer 32 is in contact with the outer periphery of the base end portion of the screw portion 33 and is fixed to the bolt 30, and the central axis c32 of the washer 32 is 2.5 mm from the central axis c30 of the bolt 30. Degree of eccentricity.

The outer diameter dimension of the washer 32 and the eccentric amount of the washer 32 in the bolt 30 and the inner diameter dimension and the eccentricity amount of the counterbore hole 22 are set to have the following relationship. That is, when the bolt 30 is rotated while the head portion 31 and the washer 32 can be accommodated in the counterbore hole 22 with the screw portion 33 inserted through the bolt through hole 21, the outer circumference and the washer 32 are in the middle of rotation. It is set so that the inner circumference of the moat hole 22 interferes with the rotation of the bolt 30. Therefore, as shown in FIG. 4A, it is farthest from the central axis c21 of the bolt through hole 21 of the counterbore hole 22 as compared with the dimension ma32 from the central axis c30 of the screw portion 33 to the farthest outer peripheral position of the washer 32. The dimension ma22 to the inner peripheral position is larger, and the dimension mi22 from the central axis c21 to the nearest inner peripheral position is formed to be smaller.

In order to fix the floor panel 20, as shown in FIG. 6A, the fixing plate 40 is attached to the screw portion 33 of the bolt 30 protruding downward of the floor panel 20, and then the nut 34 is engaged.
The fixing plate 40 is formed of a metal plate material, and is formed in a two-step step shape by a base portion 41 and an engaging piece portion 42 located below the base portion 41. A bolt insertion hole 41a through which the screw portion 33 of the bolt 30 is inserted is formed in the base portion 41. Therefore, the fixing plate 40 moves along the threaded portion 33 integrally with the nut 34 when the nut 34 is fastened.

The base 41 is rotatably attached to the screw portion 33 of the bolt 30. Further, the base portion 41 is formed to have a size that does not interfere with the upper flange 12a of the floor beam 12 in the vertical direction when attached to the screw portion 33.

The engaging piece portion 42 extends from the base portion 41 in the outer diameter direction, and in a state where the base portion 41 is in contact with the back surface of the floor panel 20, a step (base portion) can be brought into contact with the lower surface of the upper flange 12a of the floor beam 12. The position in the axial direction with respect to 41) and the length in the outer diameter direction are set. That is, by rotating the base 41 with respect to the threaded portion 33, the fixing plate 40 is vertically connected to the floor beam 12 when the floor panel 20 is bridged over the floor beam 12 as shown in FIGS. 6A and 6B. It is movably mounted between a non-engaged position that does not engage and an engaged position that engages in the vertical direction as shown in FIG. 6C.

Therefore, when the floor panel 20 is fixed to the floor beam 12, the head portion 31 and the washer 32 of the bolt 30 are housed in the counterbore hole 22, as shown in FIG. 6B. Then, as shown in FIG. 6C, the fixing plate 40 is engaged with the floor panel 20 by fastening the nut 34 as the engaging position where the engaging piece portion 42 is located below the upper flange 12a of the floor beam 12. The upper flange 12a is sandwiched between the piece portion 42, and at the same time, the base portion 41 of the fixing plate 40 is arranged close to the upper flange 12a. As a result, the floor panel 20 is restricted from moving in the vertical direction with respect to the floor beam 12 and in the longitudinal direction of the floor panel 20, and can be fixed to the floor beam 12.

In the first embodiment, the bolt 30 is also used for transporting the floor panel 20.
That is, when the floor panel 20 is transported, as shown in FIG. 6A, the hanging metal fitting 50 is inserted and engaged between the lower surface of the washer 32 of the bolt 30 and the surface 20a of the floor panel 20. Then, the hanging metal fitting 50 is hooked on the hanging tool 100 of a lifting device such as a crane, and the floor panel 20 is transported to a predetermined installation position over the floor beams 12 and 12 of the building 1.

Here, the hanging metal fitting 50 will be briefly described.
The hanging metal fitting 50 is formed of a metal plate material, and as shown in FIG. 5, the hanging metal fitting 50 is formed in a chevron cross-sectional shape by a rectangular bolt engaging piece 51 and a rectangular hanging piece 52. That is, when the bolt engaging piece 51 is positioned horizontally, the hanging piece 52 is formed so as to rise diagonally.

The bolt engaging piece 51 is formed with a screw portion insertion hole 51a. The screw portion insertion hole 51a is formed from the open end of the edge on the hanging piece 52 side to the center position of the bolt engaging piece 51, and has a width in which the screw portion 33 of the bolt 30 can be inserted. The width is smaller than the diameter of the head 31 and the washer 32.

The hanging piece 52 is formed with a head insertion hole 52a and a locking hole 52b. The head insertion hole 52a is formed at the end edge portion continuous with the bolt engaging piece 51 so as to be continuous with the screw portion insertion hole 51a, and is a rectangle having a size capable of inserting the head 31 and the washer 32 of the bolt 30. It is open to the shape. The locking hole 52b is opened in a circular shape at a position slightly away from the bolt engaging piece 51 from the center of the hanging piece 52.

Next, as shown in FIG. 1, a procedure of bridging the floor panel 20 to the floor beams 12 and 12 and arranging the floor panel 20 at a predetermined installation position and then fixing the floor panel 20 to the floor beams 12 and 12 will be described.

First, the bolt 30 and the fixing plate 40 are attached to the floor panel 20. In this case, as shown in FIG. 6A, the screw portion 33 is passed through the bolt through hole 21 of the floor panel 20 from above with the head portion 31 and the washer 32 of the bolt 30 facing up.

Next, the fixing plate 40 is attached to the screw portion 33. That is, the screw portion 33 protruding from the lower end of the bolt through hole 21 is inserted into the bolt insertion hole 41a of the base portion 41. Further, the nut 34 is engaged and mounted under the fixing plate 40 from the tip end side of the screw portion 33.
When the bolt 30 is pulled up from the floor panel 20 and the fixing plate 40 is brought into contact with the back surface of the floor panel 20, the mounting position of the nut 34 is such that the hanging metal fitting 50 is placed between the washer 32 and the surface 20a of the floor panel 20. The position is such that a gap is formed in which the bolt engaging piece 51 of the above can be inserted. Further, the fixing plate 40 is arranged at a non-engaging position.

Next, the hanging metal fitting 50 is inserted between the washer 32 and the surface 20a of the floor panel 20 and engaged with the bolt 30. Then, a hanging tool 100 of a lifting device such as a crane (not shown) is hooked in the locking hole 52b of the hanging piece 52 of the hanging metal fitting 50, and the predetermined installation position is bridged to the floor beams 12 and 12 of the building 1. Transport to. That is, since the floor panel 20 is not tied, the floor panel 20 can be directly arranged at a predetermined installation position of the floor beam 12. Further, at this time, since the fixing plate 40 is arranged at the non-engaging position, the floor panel 20 can be bridged to the floor beam 12 without interfering with the upper flange 12a of the floor beam 12.

Next, the hanging metal fitting 50 is removed from the bolt 30. Here, when the hanging metal fitting 50 is removed, the bolt 30 moves downward due to its own weight, and as shown in FIG. 6B, the head 31 and the washer 32 are housed in the counterbore hole 22. The fixing plate 40 is lowered to a position lower than the upper flange 12a of the floor beam 12.

Next, the fastening work with the fixing plate 40 and the nut 34 is performed, and this fastening work is performed from below the floor panel 20. For example, when the floor panel 20 is installed as the floor FL on the second floor, the work starts from the first floor.

In this fastening work, first, the fixing plate 40 is rotated around the bolt 30 from the non-engaging position shown in FIG. 6A to the engaging position shown in FIG. 6C, and the engaging piece portion 42 is placed on the floor beam 12. It is arranged below the flange 12a. At this point, the engaging piece portion 42 is separated below the upper flange 12a.

Next, the nut 34 is rotated in the fastening direction to narrow the distance between the head 31 and the nut 34 and the fixing plate 40, and as shown in FIG. 6C, the upper flange 12a of the floor beam 12 is attached to the lower surface of the floor panel 20. The floor panel 20 is fixed by sandwiching it between the engaging piece portion 42 and the engaging piece portion 42.

When the nut 34 is rotated in the fastening direction from the lower side in this way, the bolt 30 is initially rotated by the frictional resistance with the screw portion 33. Therefore, as shown in FIG. 4A, the location of the dimension ma32 where the distance between the central shaft c30 of the bolt 30 and the outer circumference of the washer 32 is large is the dimension of the central shaft c21 of the bolt through hole 21 and the inner circumference in the counterbore hole 22. When the ma 22 is located at a large location, the washer 32 rotates with respect to the counterbore hole 22.

However, after that, at the location of the dimension ma32 where the distance between the central shaft c30 of the bolt 30 and the outer circumference of the washer 32 is large, the distance between the central shaft c21 of the bolt through hole 21 and the inner circumference becomes narrower as shown in FIG. 4B. When approaching the location (the location of dimension mi22), the outer circumference of the washer 32 interferes with the inner circumference of the washer hole 22, and from this point, the rotation of the bolt 30 is restricted, and the nut 34 is attached to the screw portion 33. It can be rotated and fastened. As a result, the floor panel 20 can be fixed to the floor beam 12.

In this way, the operator can fasten the nut 34 from below the floor panel 20 by himself and fix the floor panel 20 to the floor beam 12. Therefore, as shown in FIG. 7, the worker 01 does not need to reach for the bolts 30 and the nuts 34 above and below the floor panel 20 with both hands, does not impose dimensional restrictions on the floor panel 20, and works. There is no need to guarantee the safety of a person from falling. Further, even if the size of the floor panel 20 is increased, no operator is required on each of the upper and lower sides of the floor panel 20, the workability is excellent, and the construction period and cost can be reduced.

(Effect of embodiment)
The effects of the floor panel fastening structure of the first embodiment are listed below.
(1) In the floor panel fastening structure of the first embodiment, the bolt 30 that penetrates the floor panel 20 upward through the head 31 and the nut 34 that is engaged with the screw portion 33 of the bolt 30 that protrudes downward from the floor panel 20. It is a floor panel fastening structure for fastening the floor panel 20 to the floor beam 12 as the frame of the building by using and. Then, a bolt through hole 21 is formed so as to penetrate the floor panel 20 vertically and penetrate the screw portion 33 of the bolt 30, and a head 31 of the bolt 30 can be accommodated at the upper end of the bolt through hole 21. A counterbore hole 22 is provided, and a rotation regulation structure for restricting the rotation of the head 31 is provided between the counterbore hole 22 and the head 31 of the bolt 30.
Therefore, when the nut 34 is fastened, the rotation of the bolt 30 is restricted by the rotation regulation structure, and the nut 34 can be fastened only by the work from the side where the nut 34 is provided on the floor panel 20. Therefore, the bolt 30 can be fastened by working from one of the upper and lower sides of the floor panel 20, the degree of freedom in the dimensions of the floor panel 20 can be improved, and the work safety can be improved. Moreover, the construction period and cost can be suppressed as compared with the case where workers are arranged above and below the floor panel 20 to perform the work in cooperation with each other.

(2) The rotation restricting structure of the floor panel fastening structure of the first embodiment includes a washer 32 eccentrically provided on the head 31 of the bolt 30, a washer hole 22 eccentrically provided on the bolt through hole 21. The counterbore hole 22 can accommodate the head portion 31 and the washer 32 in a state where the screw portion 33 is penetrated through the bolt through hole 21, and both eccentricities are measured when the bolt 30 is rotated. The outer circumference of the washer 32 interferes with the inner circumference of the washer hole 22 to regulate the rotation.
Therefore, the rotation of the bolt 30 can be regulated by a simple configuration in which the washer 32 is eccentric with respect to the bolt 30 and the counterbore hole 22 is eccentric with respect to the bolt through hole 21. Therefore, the effect of the above (1) can be obtained at a lower cost as compared with the case where the counterbore hole 22 is provided with another member such as a stopper that engages with the head 31.

(3) In the floor panel fastening structure of the first embodiment, the bolt through hole 21 and the bolt 30 are provided at positions where they do not overlap with the floor beam 12 as a skeleton in the horizontal direction, and the screw portion 33 has a nut 34. A fixing plate 40 is mounted adjacent to the fastening direction. The fixing plate 40 is formed so as to be movable along the screw portion 33, and includes an engaging piece portion 42 as an engaging portion that can be engaged with the floor beam 12, and the engaging piece portion 42 is on the floor. The engaging position that engages with the beam 12 and the non-engaging position that does not engage with the floor beam 12 are rotatably provided around the screw portion 33.
Therefore, as compared with the case where the bolt 30 is inserted into the hole formed through the floor beam 12 and then the nut 34 is fastened, the work of inserting the bolt 30 into the hole at the time of installing the floor panel 20 is performed. It is unnecessary and has excellent workability.

(4) In the floor panel fastening structure of the first embodiment, the washer 32 is provided with a hole 32a having a diameter larger than that of the screw portion 33 at the axial center portion, and the inner circumference of the hole 32a is the base of the screw portion 33. It is welded to the bolt 30 in a state of being in contact with the outer periphery of the end portion.
Therefore, the eccentricity of the washer 32 can be easily set, and the manufacturability is excellent.

(5) In the floor panel fastening structure of the first embodiment, the bolt 30 is used for transporting the floor panel 20 so that the slinging work of the floor panel 20 can be omitted. This also makes it possible to reduce the construction period and cost.

(6) The floor panel bolt fastening method of the first embodiment executes the following steps.
The head 31 and the washer 32 are arranged in the counterbore hole 22, the screw portion 33 of the bolt 30 is passed through the bolt through hole 21 of the floor panel 20, and the fixing plate 40 is inserted into the screw portion 33 protruding downward from the floor panel 20. The step of mounting the nut 34 on the screw portion 33 from the lower side of the fixing plate 40 and further arranging the fixing plate 40 in the non-engaged position.
A step of arranging the floor panel 20 at a predetermined installation position of the floor beam 12 of the building 1.
The fixing plate 40 is rotated from the lower side of the floor panel 20 to the engaging position with respect to the screw portion 33, and the nut 34 is further rotated in the fastening direction to form the outer circumference of the washer 32 and the inner circumference of the counterbore hole 22. Steps to fasten the floor panel 20 to the floor beam 12 while restricting the rotation of the head 31 due to interference.
Therefore, when the nut 34 is rotated, the head 31 and the washer 32 of the bolt 30 can be restricted from rotating without being suppressed from above. Therefore, when the bolt 30 is fastened, only the work from below the floor panel 20 is performed. Can be done with. Therefore, as described with reference to FIG. 7, one worker 01 extends his hand up and down the floor panel 02 to stop the nut from being carried around the bolt, and two workers 01 and 01 are the floor panel. There is no need to work in cooperation with the upper and lower parts of 02. Therefore, the labor and time of the work can be shortened, the construction period and the cost can be reduced, and the safety of the worker 01 can be easily ensured.

The floor panel fastening structure and the floor panel bolt fastening method of the present disclosure have been described above based on the embodiments. However, the specific configuration of the floor panel fastening structure of the present disclosure is not limited to these embodiments, and the combinations of the embodiments are combined as long as they do not deviate from the gist of each claim in the claims. , Design changes and additions are allowed.

For example, in the embodiment, an example is shown in which the floor panel fastening structure and the floor panel bolt fastening method are applied to the steel-framed building 1. However, this floor panel transportation method can be applied to conventional buildings and unit buildings as long as the floor panels are hung on the floor beams.

Further, in the embodiment, as a rotation regulation structure for restricting the rotation of the bolt 30 when the nut 34 is fastened, the washer 32 eccentric to the bolt 30 and the counterbore hole 22 eccentric to the bolt through hole 21 are relative to each other. It is shown that the outer circumference of the washer 32 and the inner circumference of the counterbore hole 22 come into contact with each other when rotating to restrict rotation, but the present invention is not limited to this. For example, an engaging piece protruding outward from the head 31 of the bolt 30 or the washer 32, and a stopper provided in the counterbore hole 22 at a certain position when the head 31 rotates. It is also possible to use a structure in which the wheels are engaged to regulate the rotation.

Further, in the embodiment, an example in which the hanging metal fitting 50 is engaged with the bolt 30 for transportation is shown, but the present invention is not limited to this, and so-called slinging may be used for transportation. In that case, the bolt 30 may be made to penetrate the floor panel 20 after the floor panel 20 is transported.

Further, in the embodiment, an example in which the floor panel 20 is fixed by using the fixing plate 40 is shown, but the structure for fixing the floor panel 20 is not limited to this. For example, the floor panel 20 may be fixed by penetrating a hole formed in a skeleton such as a floor beam 12 through a bolt 30 and fastening a nut 34 to a screw portion 33 of the penetrating bolt 30. Also in this case, when the nut 34 is fastened from below the floor panel 20, the rotation of the head 31 and the washer 32 can be restricted and fastened. Alternatively, a plate having a shape different from that of the fixing plate 40 shown in the embodiment may be used.

12 Floor beams (framework)
12a Upper flange 20 Floor panel 21 Bolt through hole 22 Counterbore hole 30 Bolt 31 Head 32 Washer 33 Threaded part 34 Nut 40 Fixed plate 42 Engaging piece (engaging part)
c21 Central axis c22 (of bolt through hole 21) Central axis c30 (of bolt 30 (head 31 and screw part 33)) Central axis c32 (of washer 32) Central axis c33 Central axis FL Floor

Claims (4)

Floor panel fastening structure for fastening the floor panel to the building frame using bolts that penetrate the floor panel with the head facing up and nuts that are engaged with the screw portions of the bolts that protrude below the floor panel. And
It is provided with a bolt through hole formed by penetrating the floor panel up and down and penetrating the screw portion, and a counterbore hole formed at the upper end of the bolt through hole so as to accommodate the head of the bolt. ,
A floor panel fastening structure provided with a rotation regulation structure for restricting the rotation of the head between the counterbore hole and the head. In the floor panel fastening structure according to claim 1,
The rotation restricting structure comprises a washer provided eccentrically to the head of the bolt and a counterbore hole eccentrically provided in the bolt through hole, and the counterbore hole is the screw. The head and the washer can be accommodated in a state where the portion is penetrated through the bolt through hole, and both eccentricities are such that when the bolt rotates, the outer circumference of the washer becomes the inner circumference of the washer hole. Floor panel fastening structure that interferes and is set to regulate rotation. In the floor panel fastening structure according to claim 2,
The bolt through hole and the bolt are provided at positions that do not overlap with the skeleton in the horizontal direction.
A fixing plate is attached to the screw portion adjacent to the fastening direction of the nut.
The fixing plate is formed so as to be movable along the screw portion, and includes an engaging portion that can be engaged with the skeleton, and an engaging position at which the engaging portion engages with the skeleton, and the above. A floor panel fastening structure that is rotatably provided around the screw portion at a non-engaging position that does not engage with the skeleton. A floor panel bolt fastening method using the floor panel fastening structure according to claim 3.
The head and the washer are arranged in the counterbore hole, the screw portion of the bolt is passed through the bolt through hole of the floor panel, and the fixing plate is formed in the screw portion protruding downward of the floor panel. After mounting the nut, the nut is mounted on the screw portion from the lower side of the fixing plate, and the fixing plate is further arranged in the non-engaging position.
A step of arranging the floor panel at a predetermined installation position of the skeleton, and
The fixing plate is rotated from the lower side of the floor panel to the engaging position with respect to the screw portion, and further, the nut is rotated in the fastening direction to rotate the outer circumference of the washer and the inner circumference of the counterbore hole. And the step of fixing the floor panel to the skeleton by fastening the floor panel while restricting the rotation of the head.
Floor panel bolt fastening method to be provided.