JP7071869B2 - Floor structure and method of reinforcing the floor - Google Patents

Description

The present invention relates to a floor structure having a reinforced floor portion and a method for reinforcing the floor portion.

For example, in a clean room, clean air is circulated and supplied in order to maintain high cleanliness. A circulation path for circulating clean air is configured by utilizing the underfloor space, and it is required that clean air can pass through the floor of the clean room. Therefore, a floor material having ventilation (for example, a free access floor panel having a plurality of ventilation holes in a floating floor panel) is installed over the existing joists to construct a floor portion of a clean room.

Since various types of equipment are installed in the clean room, it is required to reinforce the floor where the equipment is installed as a countermeasure against the load of the equipment and the vibration of the equipment. There is. Therefore, of the floor portion, the part where the equipment is installed is reinforced by adopting a floor structure provided with a foundation mount which is the basis of the equipment (see, for example, Patent Document 1).

In the floor structure described in Patent Document 1, the foundation pedestal is composed of a high-rigidity pedestal main body having a substantially square planar shape. In the high-rigidity pedestal body, the side surface portion and the top plate portion are composed of stainless steel plates, and the space surrounded by the stainless steel plates constituting the side surface portions is filled with concrete. When constructing the foundation pedestal, the high-rigidity pedestal body is placed on the existing joist, and then the high-rigidity pedestal body and the existing joist are integrated.

Japanese Unexamined Patent Publication No. 2005-336762

In the floor structure described in Patent Document 1, when the high-rigidity pedestal main body and the existing joist are integrated, the non-shrinkable solidification of non-shrink mortar or the like is formed in the through holes formed in the high-rigidity pedestal main body. It is performed by a wet method in which the material is filled. Therefore, in the floor structure described in Patent Document 1, work such as installing a damming member for damming the non-shrinkable solidifying material is required, which complicates the work and causes the non-shrinkable solidifying material. It takes a curing period until it solidifies, which causes a problem that the construction period becomes long. Further, when the reinforcing floor portion is removed, work such as breaking the solidified non-shrinkable solidifying material must be performed, which requires time-consuming work.

Especially in a clean room, the layout of equipment may be changed. Therefore, every time the layout is changed, the work to construct the foundation pedestal is performed on the part of the floor where the equipment is installed, which makes the work complicated and prolongs the construction period. It becomes a problem. Moreover, due to the layout change, the part of the floor where equipment etc. will not be installed will be changed from the reinforced floor to a breathable floor material, so it takes time and effort to remove the reinforced floor. The work must be performed, and from this point as well, the complexity of the work and the lengthening of the construction period become problems.

In view of this situation, a main object of the present invention is to provide a floor structure having a reinforced floor portion capable of simplifying the work and shortening the construction period, and providing a method for reinforcing the floor portion.

The first characteristic configuration of the present invention includes an integrated means for integrating the reinforced floor portion arranged at the reinforcement target portion of the floor portion and the existing joist.
The integrated means is configured as a dry type by fastening bolts between the reinforced floor side and the existing joist side.
The reinforcing floor portion includes one rectangular plate body and a frame body that supports the plate body, and is formed in a rectangular shape in a plan view.
The frame is composed of four channel steels arranged in a rectangular shape in a plan view.
The point is that the reinforcing floor portion is formed by integrating the separable metal plate body and the frame body in a dry manner by fastening fasteners .

According to this configuration, when constructing the reinforced floor portion, the reinforced floor portion is arranged at the reinforced target portion of the floor portion, and the reinforced floor portion and the existing joist are integrated by the integrating means. At this time, as the integration means, the reinforcing floor and the existing joist are integrated by a dry method by fastening bolts between the reinforcing floor side and the existing joist side, so that the reinforcing floor can be constructed only by the dry work. can. Therefore, as described in Patent Document 1, the work can be simplified and the construction period can be shortened as compared with the case where the reinforced floor portion is constructed by wet work.

Further, according to this configuration, the reinforcing floor portion can be easily configured from one plate body and the frame body in which four channel steels are combined, so that the reinforcing floor portion can be constructed while simplifying the configuration. Can be done.

In the second characteristic configuration of the present invention, support legs are arranged in the hollow spaces formed at the four corners of the frame body.
The upper part of the support leg is covered with the plate body placed on the frame body, and the plate body is attached to the support leg by a dry method by fastening a fastener.
The third characteristic configuration of the present invention is that each of the four channel steels is provided with the back surface of the web facing inward and the flange extending outward.

According to this configuration, since the back surface of each of the four channel steels faces inward, various members can be easily joined to the back surface of the channel steel web by welding or the like. It is possible to simplify the joining work of the members. Further, since each of the four channel steels has a posture in which the flange extends outward, the flange can be used as a handle when a worker or the like transports the frame, which simplifies the transport work. Can be planned.

The fourth characteristic configuration of the present invention is that a reinforcing member extending over the back surface of the web of channel steel located facing each other is provided.

According to this configuration, the reinforcing floor portion can be reinforced by providing the reinforcing member in a state extending over the back surface of the web of the channel steel located opposite to each other. Moreover, the reinforcing member can be easily attached by welding or the like by using the back surface of the channel steel web, and the reinforcing floor portion can be reinforced while simplifying the attachment work of the reinforcing member.

In the fifth characteristic configuration of the present invention, the reinforcing floor portion includes one rectangular metal plate body and a frame body that supports the plate body, and is formed in a rectangular shape in a plan view.
The frame is composed of four channel steels arranged in a rectangular shape in a plan view.
The first step of installing the frame body at the part to be reinforced on the floor,
The second step of integrating the frame and the existing joist by a dry method by fastening bolts between the reinforced floor side and the existing joist side,
The point is that the plate body is placed on the frame body, the frame body and the plate body are integrated by a dry method by fastening fasteners, and the third step of forming the reinforcing floor portion is performed .

According to this configuration, when reinforcing the floor, the reinforced floor is placed in the reinforced floor, and the reinforced floor and the existing joist are installed by a dry type by fastening bolts between the reinforced floor side and the existing joist side. It can be integrated with the joist. Therefore, the floor can be reinforced only by the dry work, and the work can be simplified and the construction period can be shortened.

Perspective view showing a floor having a reinforced floor Plan view showing the reinforced floor FIG. 2 is a cross-sectional view taken along the line III-III. FIG. 2 is a cross-sectional view taken along the line IV-IV. The plan view which shows the reinforced floor part in 2nd Embodiment The plan view which shows the reinforced floor part in 3rd Embodiment FIG. 6 is a cross-sectional view taken along the line VII-VII of FIG. Sectional drawing of the reinforced floor part in 4th Embodiment Plan view of the reinforced floor portion in the fifth embodiment Sectional drawing in XX of FIG.

An embodiment of the floor structure and the method for reinforcing the floor according to the present invention will be described with reference to the drawings.
[First Embodiment]
As shown in FIG. 1, the floor structure and the method for reinforcing the floor according to the present invention are applied to, for example, the floor 1 of a clean room. FIG. 1 shows a part of the floor portion 1 of the clean room, and the floor portion 1 is configured by mixing the floor panel 2 and the reinforced floor portion 3.

Of the floor portion 1, it is necessary to reinforce the floor portion 1 because the load of the equipment and the vibration of the equipment are transmitted to the portion where various devices are installed. Therefore, in the floor portion 1, the reinforcing floor portion 3 is constructed at the portion where the equipment or the like is installed to reinforce the floor portion 1, and the floor panel 2 is arranged at the other portion. FIG. 1 illustrates three floor panels 2 and one reinforcing floor portion 3.

The floor panel 2 and the reinforcing floor portion 3 are formed in a substantially square shape in a planar shape, and are arranged in a state of extending over the existing joists 4 arranged at predetermined intervals. The floor panel 2 and the reinforcing floor portion 3 are formed to have the same or substantially the same size and the same or substantially the same shape, and the reinforcing floor portion 3 can be installed in place of the floor panel 2. As a result, the floor panel 2 can be changed to the reinforcing floor portion 3 in units of the floor panel 2. Therefore, when changing the layout of the equipment, the equipment is constructed by constructing the reinforced floor 3 instead of the floor panel 2 in the part of the floor 1 where the equipment is installed due to the layout change. Can be reinforced at the site where the floor is installed. Further, since the reinforcing floor portion 3 is constructed in the portion where the equipment was installed before the layout change, when the equipment is installed due to the layout change, the reinforcing floor portion 3 is removed and the floor panel 2 is installed. Can be installed.

The floor panel 2 is composed of a floating floor panel (free access floor panel) in which a plurality of ventilation holes 21 are formed. Support legs 5 are arranged on the upper part of the existing joist 4 at predetermined intervals. Each of the plurality of floor panels 2 is arranged so that its four corners are supported by the support legs 5. Since the floor panel 2 can allow clean air in the clean room to flow to the underfloor space through the plurality of ventilation holes 21, it is possible to form a circulation path for circulating the clean air using the underfloor space.

As shown in FIGS. 2 to 4, the reinforcing floor portion 3 includes one square plate body 31 and a frame body 32 that supports the plate body 31 from below. FIG. 2 shows a plan view of the reinforcing floor portion 3, but in order to show mainly the configuration of the frame body 32 in the reinforcing floor portion 3, the plate body 31 is shown by a alternate long and short dash line, and the existing joists are shown. 4 and the integrating means 8 and the like are omitted in the figure. Incidentally, the existing joists 4 omitted in FIG. 2 are arranged so as to extend in the left-right direction with an interval in the vertical direction in FIG. 2.

As shown in FIG. 2, the frame body 32 is configured by arranging four channel steels 33 to 36 in a square shape in a plan view. As shown in FIGS. 3 and 4, the plate body 31 is provided so as to be mounted on the upper surface portion of the frame body 32. The plate body 31 is made of a metal plate body having a predetermined thickness. As shown in FIG. 2, the four channel steels 33 to 36 of the first to fourth channel steels have a U-shaped cross section (see FIGS. 3 and 4) and are formed to have the same length.

As shown in FIG. 2, the first to fourth channel steels 33 to 36 have the length direction of the first channel steel 33 parallel to the length direction of the third channel steel 35, and the length of the second channel steel 34. The vertical direction and the length direction of the fourth channel steel 36 are parallel to each other, and the length direction of the first channel steel 33 and the third channel steel 35 and the length direction of the second channel steel 34 and the fourth channel steel 36 are aligned. They are arranged so that they are orthogonal to each other. As a result, the first to fourth channel steels 33 to 36 are arranged in a square shape in a plan view in a state where the hollow space 38 is formed on the lower side of the plate body 31 at each of the four corners of the square frame body 32. Has been done.

Each of the first to fourth channel steels 33 to 36 is provided with the back surfaces of the webs 33a to 36a facing inward and the flanges 33b to 36b extending outward. As a result, as shown in FIG. 3, the web 33a of the first channel steel 33 and the web 35a of the third channel steel 35 face each other at a distance, and as shown in FIG. 4, the second groove The web 34a of the structural steel 34 and the web 36a of the fourth channel steel 36 are arranged so as to face each other with a gap. As shown in FIGS. 3 and 4, the first to fourth channel steels 33 to 36 are arranged so that the upper flanges 33b to 36b are in the same position in the vertical direction, and the upper flanges 33b to 36b are arranged. The upper surface is configured to be flush with each other.

As shown in FIG. 2, the frame body 32 is provided with a channel steel connecting member 37 for connecting the first to fourth channel steels 33 to 36. The channel steel connecting member 37 is arranged at a position where the two channel steels of the first to fourth channel steels 33 to 36 intersect, and connects the ends of the two intersecting channel steels. The square frame 32 in a plan view is provided with one channel steel connecting member 37 at a position corresponding to each of the four corners, and a total of four channel steel connecting members 37 are provided.

Since the four channel steel connecting members 37 have the same configuration, the first channel steel 33 (the channel steel located on the left side in FIG. 2) and the second channel steel 34 (the channel steel located on the upper side in FIG. 2) are used. The channel steel connecting member 37 to be connected will be described with reference to the channel steel connecting member 37 to be connected.
As shown in FIG. 2, the channel steel connecting member 37 includes a first contact wall portion 37a and a second contact wall portion 37b which are orthogonal side walls in a plan view, a right-angled triangular lower surface portion 37c in a plan view, and a lower surface portion 37c. It is provided with a top surface portion 37d (see FIGS. 3 and 4). The channel steel connecting member 37 is arranged inward of the intersecting first channel steel 33 and the second channel steel 34, and the first contact wall portion 37a abuts on the back surface of the web 33a of the first channel steel 33. The second contact wall portion 37b can be brought into contact with the back surface of the web 34a of the second channel steel 34. In the channel steel connecting member 37, the first contact wall portion 37a is joined to the back surface of the web 33a of the first channel steel 33 by welding or the like, and the second contact wall portion 37b is joined to the back surface of the web 33a by welding or the like. By joining to the back surface of the web 34a, the end portion of the first channel steel 33 and the end portion of the second channel steel 34 are connected.

As shown in FIG. 2, the frame body 32 has a first reinforcing member 39 (corresponding to a reinforcing member) in a state extending over the back surfaces of the webs 34a and 36a of the second and fourth channel steels 34 and 36 located opposite to each other. ) Is provided. The first reinforcing member 39 is made of channel steel (see FIG. 3) having a U-shaped cross section. Both ends of the first reinforcing member 39 are joined to the back surface of the web 34a of the second channel steel 34 and the back surface of the web 36a of the fourth channel steel 36, which are located opposite to each other, by welding or the like.

As shown in FIG. 2, the frame body 32 is provided with a plate member 40 on the back surface of the webs 33a and 35a of the first and third channel steels 33 and 35 located opposite to each other. The channel steels 33, 35 provided with the plate member 40 are the first and third channel steels 33, 35 (groove steels extending in the vertical direction in FIG. 2) arranged in a state orthogonal to the existing joist 4. ing. In this first embodiment, the first reinforcing member 39 is joined to the second and fourth channel steels 34 and 36, while the plate member 40 is joined to the first and third channel steels 33 and 35. The channel steel to be joined by the first reinforcing member 39 and the channel steel to be joined by the plate member 40 are different from each other.

Two plate members 40 are provided at a predetermined interval in the length direction of the first channel steel 33, and two plate members 40 are provided at a predetermined interval in the length direction of the third channel steel 35, for a total of four. It is prepared. As shown in FIG. 3, the plate member 40 is formed in an L shape in a side view having a bottom surface portion 40a and a side wall portion 40b extending upward from the bottom surface portion 40a, and the side wall portions 40b are channel steels 33, 35. It is possible to contact the back surfaces of the webs 33a and 35a. The side wall portion 40b of the plate member 40 is joined to the back surface of the webs 33a and 35a of the channel steels 33 and 35 by welding or the like, and the bottom surface portion 40a of the plate member 40 is used for bolt fastening as shown in FIGS. 2 and 4. The hole 40c is formed.

Since the reinforcing floor portion 3 can be separated into a plate body 31 and a frame body 32, the plate body 31 and the frame body 32 are integrated by fasteners 7a and 7b as shown in FIGS. 2 to 4. , The reinforcing floor portion 3 is configured. A bolt 7a (for example, a countersunk bolt) through which a hole portion 31a for inserting a bolt formed in the plate body 31 is inserted is attached to a threaded portion 7b formed in the channel steels 33 to 36 of the frame body 32 and the first reinforcing member 39. The plate body 31 and the frame body 32 are integrated by the dry type to be fastened.

As shown in FIGS. 3 and 4, the existing joists 4 spaced apart from each other are provided with a plurality of (for example, two) joist connecting members 6 in a state extending over the existing joists 4. The joist connecting member 6 is made of channel steel (see FIG. 3) having a U-shaped cross section. Both ends of the joist connecting member 6 are frictionally joined to the bottom surface of the existing joist 4 by tightening bolts. As shown in FIG. 3, the joist connecting member 6 is provided with the back surface of the web 6a facing upward and the flange 6b extending downward. As shown in FIG. 4, the web 6a of the joist connecting member 6 is formed with a hole 6c for bolt fastening.

As shown in FIGS. 3 and 4, in a state where the reinforcing floor portion 3 is arranged at the portion to be reinforced, the integrated means 8 for integrating the reinforced floor portion 3 and the existing joist 4 is provided. The integrating means 8 is configured in a dry type by fastening bolts 9 between the reinforcing floor portion 3 side and the existing joist 4 side. As shown in FIG. 4, the integrating means 8 is a bolt 9 (cutting into pieces) extending over the hole 40c of the plate member 40 on the reinforcing floor 3 side and the hole 6c of the joist connecting member 6 on the existing joist 4 side. By fastening the bolts) with a plurality of nuts 10, the reinforcing floor portion 3 and the existing joist 4 are integrated. In this way, the integrating means 8 bolts the plate member 40 (floor side intermediate member) joined to the reinforcing floor portion 3 and the joist connecting member 6 (joist side intermediate member) joined to the existing joist 4. Therefore, the reinforcing floor portion 3 and the existing joist 4 are integrated via the floor portion side intermediate member and the joist side intermediate member.

Hereinafter, a procedure for reinforcing the floor portion 1 by installing the reinforcing floor portion 3 at the portion to be reinforced in the floor portion 1 will be described.
As described above, of the floor portion 1, the portion where the equipment is installed is the portion to be reinforced. Therefore, first, as shown in FIG. 1, the reinforcing floor portion 3 is arranged at the portion to be reinforced. At this time, since the reinforcing floor portion 3 can be separated into the plate body 31 and the frame body 32, the plate body 31 can be separated from the frame body 32 and only the frame body 32 can be arranged at the reinforcement target portion. .. Further, it is also possible to integrally install the frame body 32 and the plate body 31 at the portion to be reinforced without separating the frame body 32 and the plate body 31.

For example, as shown in FIG. 4, the second and fourth channel steels 34, 36 located opposite to each other in the frame 32 are located above each of the existing joists 4 arranged at intervals. As described above, the frame body 32 is arranged. At this time, as shown in FIG. 2, since hollow spaces 38 are formed at the four corners of the frame body 32, by installing the frame body 32 at the portion to be reinforced, the support arranged on the existing joist 4 is provided. The legs 5 can enter the hollow space 38 and prevent the support legs 5 from interfering with the frame body 32.

When arranging the reinforcing floor portion 3 (frame body 32) on the upper side of the existing joist 4, as shown in FIGS. 3 and 4, the lower end portions of the channel steels 34 and 36 and the upper end portion of the existing joist 4 in the frame body 32. The height adjusting member 11 can be interposed between the and. The height adjusting member 11 is configured by arranging a plurality of plate bodies in a laminated state, and by changing the number of laminated plates, the height of the reinforcing floor portion 3 (frame body 32) can be freely adjusted. Has been done.

In a state where the reinforcing floor portion 3 (frame body 32) is arranged at the portion to be reinforced, the reinforcing floor portion 3 (frame body 32) and the existing joist 4 are integrated by the integrating means 8. The integrating means 8 has a plurality of nuts 9 (cut bolts) extending over the hole 40c of the plate member 40 on the reinforcing floor 3 side and the hole 6c of the joist connecting member 6 on the existing joist 4 side. By fastening at, the reinforcing floor portion 3 (frame body 32) and the existing joist 4 are integrated.

When the frame body 32 is integrated with the existing joist 4 by the integrating means 8, the plate body 31 is placed on the frame body 32, and the plate body 31 and the frame body 32 are integrated by the fasteners 7a and 7b. To construct the reinforcing floor portion 3. When the plate body 31 is placed on the frame body 32, the upper part of the support leg 5 that has entered the hollow space 38 (see FIG. 2) can be covered with the plate body 31, and the support leg is placed on the lower side of the plate body 31. 5 will exist. Therefore, the plate body 31 is supported by a dry method in which a fastener (for example, a countersunk bolt) through which a hole portion 31b for inserting a bolt formed in the plate body 31 is inserted is fastened to a screw portion formed in the support leg 5. It is attached to the leg 5.

As described above, as a method of reinforcing the floor portion 1, each of the following steps (1) to (3) is sequentially performed. Incidentally, the procedure of the reinforcing floor portion 1 is not limited to this procedure, and the reinforcing floor portion 3 can be installed by another procedure, and the procedure can be appropriately changed. For example, the reinforcing floor portion 3 is constructed by manufacturing and installing a floor portion in which the plate body 31 and the frame body 32 are integrated, and integrating the floor portion with the existing joist 4 by the integration means 8. You can also do it.

(1) Step of installing the frame body 32 in the portion to be reinforced (2) Step of integrating the frame body 32 and the existing joist 4 by the integration means 8 (3) Placing the plate body 31 on the frame body 32 Step to integrate the frame 32 and the plate 31

As described above, in constructing the reinforcing floor portion 3, not only the reinforcing floor portion 3 (frame body 32) and the existing joist 4 are integrated by the integrating means 8, but also the frame body 32 and the plate body 31 are integrated. Since it can be performed by the dry type, the reinforcing floor portion 3 can be constructed only by performing the dry type work, and the work can be simplified and the construction period can be shortened.

As shown in FIG. 2, the plate members 40 are arranged on both ends of the first and third channel steels 33, 35 in the length direction. In a plan view, the place where the plate member 40 is arranged is the place where the reinforcing floor portion 3 by the integrating means 8 and the existing joist 4 are fastened. Therefore, the fastening points between the reinforcing floor portion 3 and the existing joist 4 are dispersedly arranged on the four corners side of the reinforcing floor portion 3 in a plan view, and the reinforcing floor portion 3 and the existing joist 4 are integrated in a well-balanced manner. be able to. Further, since the four corners side of the reinforcing floor portion 3 are located near the mounting position of the reinforcing floor portion 3 and the support leg 5, the fastening is performed at the position near the mounting position of the reinforcing floor portion 3 and the support leg 5. A tensile force can be applied, and the reinforcing floor portion 3 can be constructed while preventing problems such as lifting of the reinforcing floor portion 3.

Although the reinforcing floor portion 3 has a simple structure in which one plate body 31 and four channel steels 33 to 36 are combined, the plate body 31 can be appropriately supported by the frame body 32, and the reinforcing floor portion 3 can be appropriately supported. 3 can be appropriately configured. In forming the reinforcing floor portion 3, each of the four channel steels 33 to 36 is provided in such a posture that the back surface of the webs 33a to 36a faces inward and the flanges 33b to 36b extend outward. The first reinforcing member 39 and the plate member 40 can be easily joined to the back surfaces of the webs 33a to 36a by welding or the like, and when the frame 32 is conveyed, an operator or the like holds the flanges 33b to 36b. Can be used as. Therefore, it is possible to simplify the work of forming the reinforcing floor portion 3 and the work of installing the reinforcing floor portion 3.

[Second Embodiment]
Since the second embodiment is another embodiment of the reinforcing member in the first embodiment, the reinforcing member in the second embodiment will be described with reference to FIG. Since other configurations and the like are the same as those in the first embodiment, the description thereof will be omitted by describing the same reference numerals and the like. Incidentally, in FIG. 5, similarly to FIG. 2, the plate body 31 is shown by a alternate long and short dash line, and the existing joists 4 and the integrating means 8 are omitted.

In the first embodiment, as shown in FIG. 2, an example in which one first reinforcing member 39 is provided as a reinforcing member is shown. Instead of this, as shown in FIG. 5, in the second embodiment, two reinforcing members, a second reinforcing member 41 and a third reinforcing member 42, are provided as the reinforcing members.

Since the second reinforcing member 41 and the third reinforcing member 42 are the same as the first reinforcing member 39, they are not shown, but are made of channel steel having a U-shaped cross section. Both ends of the second reinforcing member 41 and the third reinforcing member 42 are joined to the back surface of the web 34a of the second channel steel 34 and the back surface of the web 36a of the fourth channel steel 36, which are located opposite to each other, by welding or the like. ing. As a result, the second reinforcing member 41 and the third reinforcing member 42 are provided so as to extend over the back surfaces of the webs 34a and 36a of the channel steels 34 and 36 located opposite to each other.

[Third Embodiment]
Since the third embodiment is another embodiment of the reinforcing member in the first embodiment, the reinforcing member in the third embodiment will be described with reference to FIGS. 6 and 7. Since other configurations and the like are the same as those in the first embodiment, the description thereof will be omitted by describing the same reference numerals and the like. Incidentally, in FIG. 6, similarly to FIG. 2, the plate body 31 is shown by a alternate long and short dash line, and the existing joists 4 and the integrating means 8 are omitted.

In the first embodiment, as shown in FIG. 2, an example in which one first reinforcing member 39 is provided as a reinforcing member is shown. Instead of this, in this third embodiment, as shown in FIGS. 6 and 7, in addition to the first reinforcing member 39, a fourth reinforcing member 43 and a fifth reinforcing member 44 are provided as a total. It is equipped with three reinforcing members.

The fourth reinforcing member 43 and the fifth reinforcing member 44 are made of an angle member (see FIG. 7) having an L-shaped cross section. The fourth reinforcing member 43 and the fifth reinforcing member 44 are provided in a state extending over the first and third channel steels 33 and 35 located opposite to each other. The fourth reinforcing member 43 and the fifth reinforcing member 44 are provided at intervals in the length direction of the first and third channel steels 33 and 35. As shown in FIG. 7, the fourth reinforcing member 43 and the fifth reinforcing member 44 are arranged so as to abut on the bottom surface portion 40a of the plate member 40 from the lower side. As a result, when the plate member 40 and the joist connecting member 6 are integrated by fastening the bolt 9 and the nut 10 of the integrating means 8, the fourth reinforcing member 43 and the fifth reinforcing member 44 are connected to the bolt 9 and the nut 10. By fastening and tightening together, the plate member 40, the joist connecting member 6, the fourth reinforcing member 43, and the fifth reinforcing member 44 are integrated.

[Fourth Embodiment]
Since the fourth embodiment is another embodiment of the connection between the existing joist 4 and the joist connecting member 6 in the first embodiment, the existing joist 4 and the joist connecting member in the fourth embodiment are based on FIG. The connection with 6 will be described. Since other configurations and the like are the same as those in the first embodiment, the description thereof will be omitted by describing the same reference numerals and the like.

In the first embodiment, as shown in FIG. 4, regarding the connection between the existing joist 4 and the joist connecting member 6, the existing joist 4 and the joist connecting member 6 are frictionally joined by fastening bolts to the existing joist. An example in which the joist 4 and the joist connecting member 6 are directly connected is shown. Instead of this, as shown in FIG. 8, an angle member 12 is interposed between the existing joist 4 and the joist connecting member 6, and the existing joist 4 and the joist connecting member 6 are connected via the angle member 12. There is.

The angle member 12 has an L-shaped cross-sectional shape having a first extending portion 12a extending in the horizontal direction and a second extending portion 12b extending in the vertical direction. The bottom surface portion of the existing joist 4 is joined to the upper surface portion of the first extension portion 12a of the angle member 12 by an adhesive or by bolts, and the end portion of the joist connecting member 6 is joined to the second extension portion 12b of the angle member 12. It is joined to the back surface of the above by adhesive or by bolting.

Incidentally, FIG. 8 shows a case where the fourth reinforcing member 43 and the fifth reinforcing member 44 are provided as in the third embodiment shown in FIGS. 6 and 7.

[Fifth Embodiment]
Since the fifth embodiment is another embodiment of the integration means 8 in the first embodiment, the integration means 8 in the fifth embodiment will be described with reference to FIGS. 9 and 10. Since other configurations and the like are the same as those in the first embodiment, the description thereof will be omitted by describing the same reference numerals and the like. Incidentally, in FIG. 9, similarly to FIG. 2, the plate body 31 is shown by a alternate long and short dash line, and the existing joists 4 and the integrating means 8 are omitted.

In the first embodiment, as shown in FIG. 4, the integrating means 8 is reinforced by fastening a bolt 9 between the plate member 40 on the reinforcing floor 3 side and the joist connecting member 6 on the existing joist 4 side. An example in which the floor portion 3 and the existing joist 4 are integrated is shown. Instead of this, as shown in FIGS. 9 and 10, the integrating means 8 is provided with the reinforcing floor portion 3 by fastening bolts 9 between the channel steels 33 and 35 on the reinforcing floor portion 3 side and the existing joist 4. And the existing joist 4 can be integrated.

9 and 10 show a state in which the arrangement position of the existing joist 4 is rotated by 90 degrees in a plan view with respect to FIGS. 2 to 4. Therefore, in FIGS. 9 and 10, the reinforcing floor portion 3 is rotated by 90 degrees in a plan view and arranged with respect to FIGS. 2 to 4. As a result, as in FIGS. 2 to 4, as shown in FIG. 10, the second and fourth positions of the frame 32 facing each other on the upper side of each of the existing joists 4 arranged at intervals. The reinforcing floor portion 3 is arranged so that the channel steels 34 and 36 are located respectively.

As shown in FIGS. 9 and 10, holes 34c and 36c for bolt fastening are formed in the flanges 34b and 36b of the second and fourth channel steels 34 and 36, and the upper end of the existing joist 4 is also formed. A hole 4a for fastening a bolt is formed. The integrating means 8 includes bolts 9 (for example, one-side bolts and flips) extending between the holes 34c and 36c of the second and fourth channel steels 34 and 36 on the reinforcing floor 3 side and the holes 4a of the existing joist 4. By fastening the bolts) with the nuts 10, the reinforcing floor portion 3 and the existing joists 4 are integrated. In this way, the integrating means 8 directly bolts the channel steels 34 and 36 to the existing joists 4.

A plurality (for example, three) of the holes 34c and 36c are provided at predetermined intervals in the length direction of the second and fourth channel steels 34 and 36. The holes 34c and 36c are provided in the central portion and both ends in the length direction of the second and fourth channel steels 34 and 36. As a result, the fastening points between the reinforcing floor portion 3 and the existing joist 4 become the central portion and both ends of one side portion of the reinforcing floor portion 3 in a plan view, and the integration of the reinforcing floor portion 3 and the existing joist 4 is balanced. You can do it well. Further, since both ends of one side of the reinforcing floor portion 3 are located near the mounting positions of the reinforcing floor portion 3 and the support legs 5, at the positions near the mounting positions of the reinforcing floor portion 3 and the support legs 5. A tensile force due to fastening can be applied, and the reinforcing floor portion 3 can be constructed while preventing problems such as lifting of the reinforcing floor portion 3.

[Another Embodiment]
Other embodiments of the present invention will be described. It should be noted that the configurations of the respective embodiments described below are not limited to being applied independently, but can also be applied in combination with the configurations of other embodiments.

(1) In the above embodiment, the frame 32 is formed into a square shape in a plan view by forming the four channel steels 33 to 36 constituting the frame 32 having the same length. It is also possible to form the frame 32 into a rectangular shape (rectangular shape) in a plan view by using the two channel steels 33 as two having a long length and two having a short length.

(2) Which of the first to fifth embodiments is to be adopted can be appropriately changed. For example, a floor portion such as a portion of the floor portion 1 to which the reinforcing floor portion 3 is to be constructed. It can be changed according to the situation of 1. Further, the reinforced floor portion 3 shown in the first embodiment can be constructed on the floor portion 1, and the reinforced floor portion 3 shown in the second embodiment can also be constructed, and the first to fifth embodiments can be constructed. It is also possible to mix the reinforcing floor portions 3 shown in the plurality of embodiments.

(3) In the above embodiment, the case where the floor structure and the method for reinforcing the floor according to the present invention are applied to the floor 1 of the clean room is shown, but the floor structure 1 is not limited to the clean room, and various other types are shown. It can be applied to the floor.

1 Floor 3 Reinforced floor 4 Existing root 8 Integrated means 9 Bolt 31 Plate 32 Frame 33 1st channel steel 33a 1st channel steel web 33b 1st channel steel flange 34 2nd channel steel 34a 2nd groove Shaped steel web 34b 2nd channel steel flange 35 3rd channel steel 35a 3rd channel steel web 35b 3rd channel steel flange 36 4th channel steel 36a 4th channel steel web 36b 4th channel steel flange 39 1 Reinforcing member (reinforcing member)
41 Second reinforcing member (reinforcing member)
42 Third reinforcing member (reinforcing member)
43 Fourth reinforcing member (reinforcing member)
44 Fifth reinforcing member (reinforcing member)

Claims (5)

Equipped with an integrated means to integrate the reinforced floor part placed in the reinforcement target part of the floor part with the existing joist.
The integrated means is configured as a dry type by fastening bolts between the reinforced floor side and the existing joist side.
The reinforcing floor portion includes one rectangular plate body and a frame body that supports the plate body, and is formed in a rectangular shape in a plan view.
The frame is composed of four channel steels arranged in a rectangular shape in a plan view.
A floor structure in which the reinforced floor portion is formed by integrating the separable metal plate body and the frame body in a dry manner by fastening fasteners . Support legs are arranged in the hollow spaces formed at the four corners of the frame.
The floor structure according to claim 1 , wherein the upper part of the support leg is covered with the plate body placed on the frame body, and the plate body is attached to the support leg by a dry method by fastening fasteners . The floor structure according to claim 1 or 2 , wherein each of the four channel steels is provided with the back surface of the web facing inward and the flange extending outward. The floor structure according to claim 3, wherein a reinforcing member is provided over the back surface of a channel steel web located opposite to each other. The reinforced floor portion includes one rectangular metal plate body and a frame body that supports the plate body, and is formed in a rectangular shape in a plan view.
The frame is composed of four channel steels arranged in a rectangular shape in a plan view.
The first step of installing the frame body at the part to be reinforced on the floor,
The second step of integrating the frame and the existing joist by a dry method by fastening bolts between the reinforced floor side and the existing joist side,
A method for reinforcing a floor portion in which the plate body is placed on the frame body, the frame body and the plate body are integrated by a dry method by fastening fasteners, and the third step of forming the reinforcing floor portion is performed. ..

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