JP2011111818A - Rigid floor structure and method of construction of rigid floor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method of construction by which the amount of use of a wet material and the amount of processing on a floor panel are curtailed. <P>SOLUTION: A beam 1 and the floor panel 2 are connected to each other by using a joint metal 5. The joint metal 5 includes a base plate 54 comprising a beam abutting part 55 abutting on a lower surface of a flange 3 of the beam 1 and a panel abutting part 56 abutting on a lower surface of the floor panel 2 which are integrally formed. The joint metal 5 further includes a pin 51 extending upward from the beam abutting part 55 and inserted into a pin hole 11 formed in the flange 3 from below. Further, the joint metal 5 includes a bolt 53 extending upward from the panel abutting part 56 and inserted into a bolt hole 22 formed in the floor panel 2 from below, and a temporarily fixing spring 52 engaged with the beam 1 from the lower side of the beam 1 while being elastically deformed so that the joint metal 5 may be temporarily fixed to the beam 1. The joint metal 5 is fastened to the floor panel 2 by the bolt 53, a washer 59 and a nut 77. A gap between the bolt 53 and the bolt hole 22 is filled with the wet material 31. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention provides a rigid floor structure in which floor panels are integrated with each other in a steel building floor using a floor panel such as a lightweight aerated concrete (ALC) board, a flat roof, and the like, and these are tightly coupled to a steel beam. The present invention relates to a rigid floor construction method for constructing the rigid floor structure.

Steel building floors and flat roofs are mainly composed of deck plates and concrete composite floor plates and reinforced concrete floor plates, and floor panels such as ALC plates.
In the former, concrete is cast on site, and the floor board and the steel beam are fastened together with a headed stud or the like, so that the floor board can bear the in-plane shear force acting on the floor surface during an earthquake. Therefore, no floor brace is required. Further, since the floor plate restrains the movement of the upper flange of the beam, it is not necessary to prevent lateral buckling in the case of a small beam. Such a floor structure in which the floor board can bear the in-plane shear force acting on the floor surface is generally called a rigid floor structure.

  In the latter case, the general construction method is to place the floor panel on the beam and fix it so that the floor panel does not move or lift from the beam, and bears the in-plane shear force of the floor surface. I can't do it. Thus, in general, floor braces are provided to handle in-plane shear forces. In addition, it is necessary to prevent the lateral buckling of the beam.

The floor brace is placed below the floor panel, which not only obstructs the ceiling plumbing, sound absorbing material, curtain box work, etc. of the ceiling below the floor, but also the manufacture and construction of the brace itself. Costs are also incurred. Therefore, there is a demand for a rigid floor structure that tightly connects floor panels and the floor panels and steel beams.
For example, a rigid floor hardware with supporting hardware welded to both ends of a reinforcing bar is installed at the joint of the floor panel, and the supporting hardware at both ends are joined to two steel beams over which the floor panel is spanned by a one-side joint. A rigid floor structure has been proposed in which mortar is filled in the joints of the floor panel in which the reinforcing bars enter and the notches of the floor panel in which the support hardware is installed (see, for example, Patent Document 1).

  In addition, floor panels with notches with joint nuts protruding and fixed at the corners are arranged on the two beams, and the support brackets are fixed to the beams with bolts at the notches in the floor panel. A rigid floor structure in which a panel is fixed with bolts has been proposed (see, for example, Patent Document 2).

Japanese Patent Laid-Open No. 9-218661 JP-A-8-120814

By the way, in the rigid floor structure described in Patent Document 1, the shape of the rigid floor hardware is a shape in which the support hardware is attached to both ends of the rebar having the same length as the floor panel, so that the weight of the entire hardware is heavy and handling is inconvenient. In addition, transportation is also inconvenient.
Furthermore, since it is necessary to fill a large amount of mortar in the joints and the notches of the panel, it takes time for construction and increases the cost.

Further, in the rigid floor structure described in Patent Document 2, when a floor panel is manufactured, notching a corner portion of the floor panel and supplying a joint nut and a reinforcing bar for fixing the joint nut greatly increase the cost.
Furthermore, when fastening the support bracket to the floor panel, the bolts must be inserted and tightened in the lateral direction in a narrow area of the notch, making construction difficult.

  The present invention has been made in view of such circumstances, minimizing the use of wet materials such as mortar, minimizing processing on floor panels, and being excellent in workability and production. An object of the present invention is to provide a rigid floor structure and a rigid floor construction method capable of minimizing the overall cost of construction.

  In order to solve the above-mentioned problem, the rigid floor structure according to claim 1 is a rigid floor structure including a floor panel laid and spread between steel beams arranged in parallel to each other, and the steel beam is attached to the steel beam. A joining member that joins an end of a floor panel to be placed and the steel beam; and a movement restricting member that is provided across the adjacent floor panels and restricts relative movement between the floor panels. Is a base member integrally provided with a beam contact portion that contacts the lower surface of the flange of the steel beam and a panel contact portion that contacts the lower surface of the floor panel, and extends upward from the beam contact portion, A pin inserted from below into a pin hole provided in the flange, a bolt extending upward from the panel contact portion and inserted from below into a bolt hole provided in the floor panel, and the steel beam From the underside of the steel beam A temporary fixing member that engages while deforming and temporarily fixes the joining member to the steel beam. A pin is inserted into the pin hole of the flange, and a bolt is inserted into the bolt hole of the floor panel. And, in a state where the joint member is temporarily fixed to the steel beam by the temporary fixing member, the joint member is fastened to the floor panel by the bolt, a washer and a nut, and is formed in a gap between the bolt and the bolt hole. It is characterized by being filled with a wet material.

  A rigid floor structure according to a second aspect is the plate according to the first aspect, wherein the movement restricting member is disposed between the adjacent floor panels and is fixed to the upper surface of the floor panel. It is a base material of a shape.

  A rigid floor structure according to a third aspect is the invention according to the first aspect, wherein the movement restricting member is formed on a side edge portion of the floor panel so as to be overlapped between the adjacent floor panels to form one concave portion. It is a hardened material that is filled and hardened in the notched portion provided.

  The rigid floor construction method according to claim 4 is a rigid floor construction method in which a floor formed by laying and laying floor panels between steel beams arranged in parallel to each other is a rigid floor structure, and the flange of the steel beam A base member integrally provided with a beam abutting portion that abuts on the lower surface of the floor panel and a panel abutting portion that abuts on the lower surface of the floor panel, and a pin that extends upward from the beam abutting portion and is provided on the flange A pin inserted into the hole from below, a bolt extending upward from the panel abutting portion and inserted into a bolt hole provided in the floor panel, and the steel beam from below the steel beam And a temporary fixing member that engages while elastically deforming and temporarily fixes the joint member to the steel beam, and inserts the pin into the pin hole of the flange, and the floor panel Insert the bolt into the bolt hole And, in a state where the joining member is temporarily fixed to the steel beam by the temporary fixing member, the joining member is fastened to the floor panel by the bolt, a washer and a nut, and wet in a gap between the bolt and the bolt hole. A movement restricting member that fills the material and restricts relative movement between the floor panels is provided across the adjacent floor panels.

  The rigid floor construction method according to claim 5 is the invention according to claim 4, wherein the movement restriction member for restricting relative movement between the floor panels is provided across the adjacent floor panels as the movement restriction member. The plate-like base material is arranged between the adjacent floor panels and is fixed to the upper surface of the floor panel.

  The rigid floor construction method according to claim 6 is the invention according to claim 4, wherein when the movement restricting member for restricting relative movement between the floor panels is provided across the adjacent floor panels, the adjacent floor panels are arranged. A cutout portion is provided in a side edge portion of each floor panel so as to form an integral concave portion, and the cutout portion is filled with a curing material as the movement restricting member and cured.

  In the invention according to claim 1 and claim 4, since the joining member is attached by inserting a pin into the pin hole of the flange of the beam, the workability is improved as compared with the case where it is fastened with a bolt. . Moreover, when a pin is inserted into the pin hole from the lower side of the flange, the upper end of the pin may protrude above the upper surface of the beam. In addition, the upper end of the temporary fixing member that engages with the beam may protrude above the upper surface of the beam. Therefore, in the state where the end of the floor panel is placed on the upper surface of the beam, it is necessary to provide a notch for avoiding pins and temporary fixing members on the lower surface of the floor panel. Can be small.

  That is, when fastening steel beams and joint hardware with bolts, not only the minimum space for avoiding bolts, but also space for bolt fastening work is required, and the notches formed in the floor panel In contrast, in the present invention, since the pin of the joint metal piece is only inserted into the pin hole of the flange of the beam, the notch can be made the minimum size to avoid the pin and the temporary fixing member. .

  Further, the joining member is fastened to the floor panel with a bolt, and the position of the joining hardware with respect to the floor panel is fixed. Thereby, the position of the edge part of the floor panel which will be in the state mounted on the steel beam, and the beam contact part arrange | positioned under a steel beam are fixed. Therefore, the position of the beam abutting part is fixed to the lower surface of the beam, and the joint hardware having the beam abutting part is fixed to the floor panel, so that the floor panel does not float from the steel beam. The floor panel is fixed. Moreover, since the pin is inserted into the pin hole of the flange of the steel beam, a horizontal force is transmitted between the steel beam and the joining member fastened to the floor panel.

  The steel beam and the floor panel are joined by such a joint hardware. Moreover, since the relative movement (horizontal relative movement) between adjacent floor panels is restricted by the movement restricting member, the floor using the floor panel can be a rigid floor structure. As a result, it is possible to eliminate the lateral buckling of the floor brace and the small beam, thereby improving the workability and reducing the cost and facilitating the work of ceiling equipment piping work, sound absorbing material work, and curtain box work.

  In addition, as described above, the floor panel is joined to the steel beam using the joining member. The pin is inserted into the pin hole, the bolt is inserted into the bolt hole, and the temporary fixing member temporarily attaches the joining member to the steel beam. In a fixed state, a nut is screwed onto the bolt via a washer, the floor panel is fastened to the joining member, and the wet material is filled in the gap between the bolt and the bolt hole, so that workability is good. In addition, since the relative movement between the floor panels is restricted by the movement restricting member, for example, a structure in which the floor panel can be rotated with respect to the joining member by using one bolt for fastening the floor panel to the joining member. There is no problem, and it is possible to simplify the structure and save labor in fastening work by using one bolt for the joining member and one bolt hole for the floor panel.

Further, the floor panel may be provided with the bolt hole, for example, a countersink for preventing the upper end of the bolt from coming out on the floor panel, and a notch for avoiding the above-described pin, etc. Panel processing is simplified, and an increase in cost due to floor panel processing can be prevented. Moreover, it can prevent that the intensity | strength of a floor panel falls by giving many processes and a big process to a floor panel. Further, when the number of bolt holes is one as described above, the floor panel can be further processed.
Moreover, even if it fills with the wet material in the clearance gap between a volt | bolt hole and a volt | bolt, the usage-amount of a wet material will become a little, filling will be completed in a short time, and the increase in cost can be prevented.

  In invention of Claim 2 and Claim 5, using as a movement control member the base material (for example, plywood and particle board) of the floor finishing material generally used with the steel structure building used as a house. In addition, since the base material is disposed between the adjacent floor panels and is only fixed to the floor panel with a tapping screw or the like, an increase in cost due to the use of the movement restricting member can be prevented.

  In the invention according to claim 3 and claim 6, even in a floor structure that does not use the base material, a rigid floor structure can be constructed using a hardener as a movement restricting member. In addition, you may use the construction method using the hardening | curing material as a movement control member for the floor structure which uses a base material.

It is a principal part perspective view which shows the rigid floor structure which concerns on embodiment of this invention. It is a figure which shows the floor panel used with the said rigid floor structure, Comprising: (a) is a top view, (b) is a side view, (c) It is a bottom view. It is a figure which shows the joining metal fitting used with the said rigid floor structure, Comprising: (a) is a side view, (b) is a front view, (c) is a bottom view. It is principal part sectional drawing which shows the said rigid floor structure. It is a principal part bottom view which shows the said rigid floor structure. It is a top view which shows the fastening part with the joint metal fitting of the floor panel of the said rigid floor structure. The washer used by the said rigid floor structure is shown, (a) is a top view, (b) is a side view. It is a principal part perspective view which shows the modification of the said rigid floor structure.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
As shown in FIGS. 1 to 7, the rigid floor structure of this example is, for example, a floor constructed by a floor panel 2 such as an ALC plate spanned between beams (steel beams) 1 in a steel building. Applies to the roof. The beam 1 is made of, for example, an H-shaped steel and has a flange 3 and a web 4. The floor panel 2 is made of ALC or other known materials, and is formed in a long rectangular shape.
In the rigid floor structure, the floor panel 2 is arranged in a state of being bridged between two beams 1 that are parallel to each other and at the same height. Further, the longitudinal direction of the floor panel is arranged to be orthogonal to the longitudinal direction of the beam 1.

  The end portion of the floor panel 2 is placed on the flange 3 of the beam 1. In addition, on the flange 3 of the beam 1, two floor panels 2 are arranged in a state where the end surfaces are attached to each other with the position of the web 4 as a boundary. Further, the flange 3 of the beam 1 and the end of the floor panel 2 are connected via a joint metal (joining member) 5. A floor-finished plate-like base material (movement restricting member) 6 made of plywood or particle board is fixed to the upper surface side of the floor panel 2.

  The beam 1 is provided with a pin hole 11 in the upper flange 3 for inserting a pin 51 (to be described later) of the joint hardware 5. The pin hole 11 is provided corresponding to the mounting position of the floor panel 2 of the beam 1. That is, the flange 3 of the beam 1 is provided with a pair of pin holes 11 for one floor panel 2 across the center line of the floor panel 2 orthogonal to the longitudinal direction of the beam 1. A pair of pin holes 11 and a pair of adjacent pin holes 11 are spaced apart from each other by a width corresponding to the width of the floor panel 2. Further, except for the beam 1 near the wall as described above, the floor panels 2 adjacent to each other in the direction orthogonal to the longitudinal direction of the beam 1 are arranged on the upper side of the beam 1 with the end faces facing each other with the web 4 as a boundary. Therefore, the upper flange 3 of the beam 1 is in a state in which a pair of pin holes 11 are arranged in each part with the web 4 as a boundary, and the floor panels adjacent to each other with the web 4 interposed therebetween are substantially the same. When arranged by arrangement, the four pin holes 11 are arranged in one place.

  The floor panel 2 is a long rectangular plate, and both end portions in the longitudinal direction are placed on the flange 3 on the upper side of the beam 1. Here, the pin 51 of the metal joint 5 inserted from the lower side into the pin hole 11 of the flange 3 of the beam 1 protrudes above the upper surface of the upper flange 3. Further, in the vicinity of the pin 51, a later-described temporary fixing spring (temporary fixing member) 52 of the metal joint 5 protrudes above the upper surface of the flange 3.

  Therefore, since the end of the floor panel 2 cannot be placed on the flange 3 as it is, the floor panel 2 is provided with the notch 21 for escaping the pin 51 protruding on the flange 3 and the temporary fixing spring 52. Yes. The notch 21 has a depth and size close to the minimum necessary so that the support strength of the floor panel 2 is not hindered.

In this example, the temporary fixing spring 52 is disposed at a position between the pair of pins 51, and the temporary fixing spring 52 is located farther from the end surface of the floor panel 2 than the pin 51. The portion 21 corresponds to the distance between the pair of pins 51 arranged with the center line of the floor panel 2 in between, and the center portion in the width direction (direction parallel to the longitudinal direction of the beam 1) of the end of the floor panel 2 Is provided.
Further, the shape of the notch 21 is approximately semicircular, the chord side of the semicircle (arc) is disposed on the end face side of the floor panel 2, and the chord side of the semicircular notch 21 is the end face of the floor panel 2. It is in the open state.

  A pair of pins 51 is arranged in a wide portion of the notch 21 on the end face side of the floor panel 2, and is located on the side farther from the end face than the pin 51, and is a temporary fixing spring narrower than the distance between the pair of pins 51. 52 is arranged in a portion where the width of the semicircular cutout 21 is narrowed. As a result, the size of the notch 21 is substantially the minimum necessary.

Further, at the end of the floor panel 2, a bolt hole 22 penetrating the floor panel 2 up and down is formed in the center in the width direction on the center side in the longitudinal direction from the portion on the flange 3 on the upper side of the beam. ing. Further, a counterbore 23 centering on the bolt hole 22 is formed around the bolt hole 22 on the upper surface of the floor panel 2.
Further, an interval of about the thickness of the floor panel 2 is provided between the counterbore 23 having the bolt holes 22 and the end surface of the floor panel 2 so as not to hinder the support strength of the floor panel 2. .

The bolt hole 22 is configured such that a later-described bolt 53 of the metal fitting 5 is penetrated, and the floor panel 2 is fastened to the metal fitting 5 by the bolt 53, a washer 59 and a nut 77. Moreover, since the grout material 31 as a wet material is filled between the bolt hole 22 and the bolt 53, the diameter (inner diameter) of the bolt hole 22 absorbs construction errors, and the grout material 31 is surely secured. It is preferable to set the diameter about 10 mm larger than the diameter of the bolt 53 so that the injection can be performed. The wet material is a material that hardens after building construction and develops strength, and examples thereof include a grout material 31 such as cement milk.
The diameter of the counterbore 23 is larger than the diameter of the washer 59, and the depth thereof is as small as possible within a range in which the bolt 53 does not protrude from the upper surface of the floor panel 2 in consideration of the extra thread portion of the bolt 53. Say it.

The metal joint 5 includes a base plate 54, the pin 51, the temporary fixing spring 52, and the bolt 53.
The base plate 54 includes a beam contact portion 55 that contacts the lower surface of the flange 3 on the upper side of the beam 1, and a panel contact portion 56 that contacts the lower surface on the center side of the portion placed on the flange 3 at the end of the floor panel 2. And an intermediate portion 57 between the beam contact portion 55 and the panel contact portion 56.

Since there is a difference in the height of the flange 3 between the lower surface of the flange 3 and the lower surface of the floor panel 2, the intermediate portion 57 has a horizontal beam contact portion 55 and a panel contact portion 56. It forms so that it may become diagonal with respect to.
Further, the intermediate portion 57 is formed with an opening 58 through which the temporary fixing spring 52 penetrates as will be described later at the center in the width direction (direction parallel to the longitudinal direction of the beam 1).

  A pair of the pins 51 are welded to the beam contact portion 55 of the base plate 54 in a state of being aligned along the width direction. The pin 51 is firmly welded to the beam abutting portion 55 on the lower surface side of the beam abutting portion 55 in a state where a lower end portion thereof penetrates a through hole provided in the beam abutting portion 55. In addition, the upper end portion of the pin 51 has a truncated cone shape for easy insertion into the pin hole 11. A dome shape may be used.

In addition, since the horizontal force is transmitted between the joint metal 5 and the beam 1 as described later, the base end portion joined to the beam contact portion 55 of the pin 51 is based on the shearing force. Bending stress acts. Therefore, the base end portion of the pin 51 needs to be firmly welded to the beam contact portion 55.
The reason why the number of pins 51 is two is to restrict the rotation of the metal joint 5 with respect to the beam 1.

A certain amount of clearance is required to enable the pin 51 to be inserted into the pin hole 11 easily and smoothly. Here, for example, the inner diameter of the pin hole 11 is about 1 mm added to the outer diameter of the pin 51. It is made to become below the value, and it suppresses rattling. The clearance value varies depending on the diameter values of the pin hole 11 and the pin 51.
By inserting the pin 51 into the pin hole, the horizontal movement of the metal joint 5 with respect to the beam 1 is restricted, and the horizontal force is transmitted between the beam 1 and the metal joint 5. It is like that.

  The temporary fixing spring 52 is provided at a position between the pair of pins 51 of the base plate 54. The temporary fixing spring 52 is a plate spring formed by bending a band-shaped metal plate (thin steel plate), and a fixing portion 71 fixed to the lower surface of the base plate 54 by welding, and a substantially horizontal fixing portion 71. A U-shaped portion 72 that is bent 90 degrees from the bottom and then curved in a U-shape and is directed upward, and an extending portion 73 that extends further upward from the U-shaped portion 72 and penetrates the opening 58. A locking portion 74 that is bent so as to be locked to the upper surface of the upper flange 3 of the beam 1 from the upper end of the extending portion 73, and is inclined so as to move away from the flange 3 to be engaged as it goes upward. And an inclined portion 75.

When the pin 51 is inserted into the pin hole 11 of the upper flange 3, the locking portion 74 of the temporary fixing spring 52 is locked to the side edge of the flange 3, and temporarily fixed to the pin 51 inserted into the pin hole 11. The joining hardware 5 is temporarily fixed to the upper flange 3 of the beam 1 by the spring 52.
When the pin 51 is inserted into the pin hole 11, the upper side of the temporary fixing spring 52 is placed on the side edge of the upper flange 3 in a state where the horizontal movement of the metal joint 5 is restricted as described above. The inclined portion 75 is in contact. In this state, when the lower locking portion 74 of the inclined portion 75 is to be locked to the side edge portion of the upper flange 3, the inclined portion 75 is pressed against the side edge portion of the flange 3 and away from the flange 3. The locking part 74 moves. At this time, the U-shaped portion 72, the extending portion 73, and the like of the temporary fixing spring 52 are elastically deformed, so that the locking portion 74 moves.

The locking portion 74 thus moved contacts the side surface of the flange 3 from the lower side, and then moves upward, and when it moves over the flange 3, it moves to the flange 3 side, and the side edge of the flange 3 is moved to the flange 3 side. The metal fitting 5 is temporarily fixed to the beam 1 by being locked to the upper surface.
The bolt 53 has, for example, a normal hexagonal head and a rod-shaped male screw portion, and is provided on the panel abutting portion 56 of the base plate 54 of the metal joint 5.
The bolt 53 is inserted from below into an insertion hole having an inner diameter slightly larger than the outer diameter of the male thread portion formed in the panel contact portion 56, and the head is welded to the lower surface of the panel contact portion 56. The bolt 53 is fixed to the panel contact portion 56 so that the male screw portion extends vertically upward from the panel contact portion 56.

  The bolt 53 is inserted into the bolt hole 22 of the floor panel 2 when the pin 51 is inserted into the pin hole 11 of the upper flange 3 of the beam 1 and the temporarily fixing spring 52 is locked to the flange 3 as described above. It is supposed to be inserted. Further, when the joint hardware 5 is temporarily fixed to the beam 1 as described above, the panel contact portion 56 of the joint hardware 5 is disposed on the lower surface side of the floor panel 2 on the beam 1 and the bolt 53 is provided on the floor panel. The upper end portion of the bolt 53 (male thread portion) is inserted into the bolt hole 22 formed in the upper surface of the floor panel 2. A nut 77 is screwed to the upper end portion of the bolt 53 via a washer 59, and the metal fitting 5 is fastened to the floor panel 2 by tightening the nut 77.

The washer 59 has a larger diameter than the nut 77 and the bolt hole 22 in order to securely fasten the bolt 53 to the floor panel 2 by the nut 77 with respect to the bolt hole 22 having a larger diameter than the bolt 53.
Therefore, although the bolt hole 22 is blocked by the washer 59, the washer 59 is not only formed with the bolt through hole 78 through which the bolt 53 is penetrated, but also communicates across the bolt through hole 78. A long hole 79 is formed. The length of the long hole 79 in the longitudinal direction is, for example, about three times that of the bolt through hole 78, and the long hole 79 extends from the bolt through hole 78 to the left and right.

  In a state in which the nut 77 is screwed into the bolt 53 through the bolt 53 through the bolt through hole 78 of the washer 59, the bolt through hole 78 is closed by the bolt 53 and the nut 77, but the long hole 79 is at the center. The portion (the portion overlapping the bolt through hole 78) is closed by the bolt 53 and the nut 77, but the left and right portions except for the central portion are open. The grout material 31 is injected from one of the left and right open portions of the long hole 79. In addition, although the well-known grout material 31 can be used, it is preferable to use what has high fluidity as the grout material 31 so that the grout material 31 can be poured into a relatively narrow space without a gap.

When the grout material 31 is injected into the bolt hole 22, the lower side of the bolt hole 22 is closed by the panel contact portion 56 of the joint metal 5 that is in contact with the lower surface of the floor panel 2. The grout material 31 is filled between the inner peripheral surface of the bolt hole 22 and the outer peripheral surface of the bolt 53 without leaking. At this time, when the bolt hole 22 is filled with the grout material 31, the grout material 31 overflows and is discharged from the other open part of the long hole 79 of the washer 59, for example. You can see that 31 is full.
When the wet material (grouting material 31) is used as in the present invention, the diameter of the bolt hole 22 can be increased to increase the bearing area, and the overall bearing strength can be increased. In the case where the floor panel 2 is an ALC plate (lightweight cellular concrete), the bearing strength per unit area of the bolt hole 22 is smaller than that of a precast concrete plate or the like, and therefore the present invention is particularly effective.

  In the rigid floor structure having the beam 1, the floor panel 2, and the joint hardware 5 as described above, the floor panel 2 having a longitudinal direction orthogonal to the two beams 1 arranged in parallel is bridged. In addition to being arranged in a state, a plurality of floor panels 2 are lined up in a direction perpendicular to the longitudinal direction. Basically, such a structure is repeated in a direction orthogonal to the longitudinal direction of the beam.

In this state, the pin 51 of the metal fitting 5 is inserted into the pin hole 11 of the upper flange 3 of the beam 1, the temporary fixing spring 52 is locked to the side edge of the flange 3, and the bolt 53 of the metal fitting 5 is Fastened to the floor panel 2. Thereby, the both ends of the floor panel 2 are joined to different beams 1 via the joint hardware 5. Since the pin 51 is only inserted into the pin hole 11, the floor panel 2 is allowed to move in the vertical direction. However, the beam contact portion 55 of the metal fitting 5 fastened to the floor panel 2 is in contact with the lower surface of the flange 3 of the beam 1, and the end portion of the floor panel 2 is in contact with the upper surface of the flange 3. The vertical movement of the floor panel 2 with respect to the beam 1 is restricted. Thereby, even if the pin 51 is just inserted into the pin hole, the floor panel 2 is fixed to the beam 1 so as not to be lifted from the beam 1.
The pin 51 functions as a member that transmits a horizontal force between the beam 1 and the floor panel 2.

Moreover, the bolt 53 of the joint hardware 5 is fastened to the floor panel 2, and further, a wet material is filled in the gap between the bolt hole and the bolt, so that a horizontal force is generated between the joint hardware 5 and the floor panel 2. It is possible to communicate. However, since there are only two bolts 53 for one joint hardware 5 but only one bolt 53, the floor panel 2 is allowed to rotate relative to the joint hardware 5 joined so as not to rotate to the beam 1. Will be.
Therefore, when the parallel beams 1 supporting the both ends of the floor panel 2 are shifted by applying a shearing force to the floor surface, the individual floor panels 2 rotate and try to follow this. In that case, shear deviation occurs between adjacent floor panels 2. On the contrary, if this shift is stopped, the rotation of the individual floor panels 2 is stopped, and a structure that can resist the shearing force of the floor surface is obtained.

Therefore, in this example, when the steel structure building is a house (including an apartment house), a plywood or a particle board is generally arranged on the upper surface of the floor panel 2 as the base material 6 of the floor finishing material. To use it. That is, by arranging such a base material 6 so as to straddle at least between adjacent floor panels 2 and fixing the base material 6 to the floor panel 2 with a plurality of (multiple) tapping screws or the like, The rotation of the floor panel 2 is stopped to prevent the shear deviation.
Two bolts 53 may be used as rotation stoppers, but the tightening work of the bolts 53 is doubled, and two bolt holes 22 are formed in the vicinity of each end of the floor panel 2 so that the bolts In this example, the rotation of the floor panel 2 is stopped by the base material 6 because there is a possibility that the strength of the portion to which the force is applied by 53 may be reduced.
Moreover, the base material 6 is arrange | positioned so that the whole surface of the part by which the floor panel 2 was spread | covered may be covered.

Next, a rigid floor construction method for constructing such a rigid floor structure will be described.
First, before constructing a rigid floor structure on the site, the upper flange 3 of the beam 1 on which the end of the floor panel 2 is placed is symmetrical with the center line of the floor panel 2 laid on the flange 3 as described above. A pair of pin holes 11 is opened and placed in
At both ends of these floor panels 2, notches 21 are provided on the center line of the lower surface. Further, a countersink 23 is provided on the upper surface of the center line slightly apart from both ends, and a bolt hole 22 is provided in the center thereof.

A pair of pins 51, a single bolt 53, and a temporary fixing spring 52 are fixed to one side of the base plate 54 to join the beam 1 and the end of the floor panel 2 placed on the beam 1. A shaped metal fitting 5 is used.
After the floor panel 2 is installed on the flange 3 of the beam 1, a pair of pins 51 are inserted into the pair of pin holes 11 of the upper flange 3 of the beam 1, and a bolt 53 is inserted into the bolt hole 22 of the floor panel 2. In this way, the metal fitting 5 is brought into contact with the lower side. At that time, the joint metal 5 is pushed upward until the temporarily fixing spring 52 is engaged so as to hold the flange 3 of the beam 1, so that the joint metal 5 is temporarily fixed to the beam 1 by the temporary fixing spring 52. As will be described later, the metal fitting 5 is screwed onto the bolt 53 so that it does not fall until it is fastened to the floor panel 2.

Next, a washer 59 with a long hole 79 and a nut 77 are installed on the male thread portion of the bolt 53 protruding into the floor digging 23 of the floor panel 2, and the nut 77 is tightened.
Next, the grout material 31 is injected into the gap between the bolt hole 22 and the bolt 53 of the floor panel 2 from one end of the long hole 79 of the washer 59 and fixed.
After fixing all the floor panels 2 to the beam 1 with the joint hardware 5, the base material 6 is spread on the floor panel 2 across the joints between the floor panels 2 and fixed to the floor panel 2 with the tapping screw 80. To do.

  According to the rigid floor structure and the rigid floor construction method as described above, the floor panel 2 and the beam 1 are joined by the joint hardware 5 that can be easily installed, and the base material 6 disposed between the floor panels 2. By restricting the rotation of the floor panel 2, the in-plane shear force acting on the floor surface can be borne by the beam 1, the floor panel 2, the joint hardware 5, the base material 6, and the like. Therefore, the floor structure using the floor panel of ALC can be made into a rigid floor structure that does not require floor brace and lateral buckling by simple construction and easy construction.

  Accordingly, floor braces and lateral buckling prevention are not required, and it is possible to reduce the labor and cost of construction when the floor structure using the floor panel 2 such as ALC is made a rigid floor structure. Furthermore, in the floor structure using the floor panel 2, the floor brace disposed on the lower ceiling side of the floor structure is eliminated, thereby facilitating ceiling equipment piping work, sound absorbing material work, curtain box work, and the like. .

  Further, in joining the metal fitting 5 and the beam 1, the pin 51 of the metal fitting 5 is inserted into the pin hole 11 of the upper flange 3 from the lower surface of the upper flange 3 of the beam 1 and the bolt hole 22 of the floor panel 2. By inserting the bolt 53, the temporary fixing spring 52 is engaged with the side edge of the upper flange 3 of the beam 1 and is temporarily fixed so that the joint hardware 5 does not fall on the beam 1. It becomes good.

  For example, the temporary fixing of the joint hardware 5 to the beam 1 can be easily performed by using a stepladder from the lower floor portion of the floor after a plurality of floor panels 2 are spread on the beam 1. . In addition, it is also possible to attach the joint hardware 5 to the beam 1 on the lower side of the floor panel 2 while being on the floor panel 2 while providing the floor panel 2. Further, when it is necessary to remove the metal joint 5 for some reason, the flange 3 of the beam 1 is elastically deformed by inserting a finger or a jig through the opening 58 of the metal joint 5 and elastically deforming the temporary fixing spring 52. Can be removed from.

Further, the joining of the beam 1 and the metal fitting 5 is basically simple by merely inserting the pin 51 into the pin hole 11 of the flange 3. In addition, finally, the vertical movement of the floor panel 2 with respect to the beam 1 is also regulated by fastening the bolt 53 of the metal fitting 5 to the floor panel 2 as described above.
Further, when attaching the metal fitting 5 to the beam 1, if a bolt is used instead of the pin 51, a floor panel formed only to avoid the pin 51 protruding on the flange 3 and the temporary fixing spring 52. 2 may need to have a large working space for fastening a nut to a bolt, and securing the strength of the floor panel 2 becomes difficult.

  Further, in this example, the processing on the floor panel 2 side may be only the above-described notch portion 21, bolt hole 22, and countersink 23 thereof. That is, it is only necessary to process a simple shape, and an increase in cost and a decrease in strength due to processing of the floor panel 2 can be prevented. In particular, when the floor panel is ALC, the above-described processing can be performed with very common equipment and tools. For example, the floor panel 2 can be processed with a drill, a rotary blade, and the like, and an increase in cost is prevented. The

Further, in joining the floor panel 2 and the joint metal 5, by temporarily fixing the joint metal 5 to the beam 1, the upper end portion of the bolt 53 of the joint metal 5 is exposed in the pocket 23 on the upper surface of the floor panel 2. Thus, the fastening operation can be easily performed using the washer 59 and the nut 77 from the upper side of the floor panel 2. Moreover, since only the fastening operation | work of the two volt | bolts 53 with respect to the floor panel 2 should just be performed, a work amount will also become a thing small.
Moreover, since the joining hardware 5 will be in the state which connects the upper edge flange 3 of the beam 1 and the edge part of the floor panel 2 mounted on the said flange 3, it can shorten length. Further, since the metal fitting 5 is simply provided with the pin 51, the temporary fixing spring 52, and the bolt 53 on the base plate 54 which is considerably shorter than the length of the floor panel 2, it can be reduced in weight and can be stored and handled. Easy.

Further, the pin 51 needs to be firmly fixed to the base plate 54, but the temporary fixing spring 52 is for temporary fixing, so it is not necessary to be fixed as strongly as the pin 51, and the bolt 53 is finally also the base. Since it will be in the state fastened by the board 54 and the floor panel 2, it is not necessary to fix firmly, and these welding operations can be made simple.
The grout material 31 is injected between the outer peripheral surface of the bolt 53 and the inner peripheral surface of the bolt hole 22 of the floor panel 2. However, since the injection amount is small, it takes a long time for the injection. In addition, the cost for injecting the grout material 31 is also small.

FIG. 8 shows a modified example of the rigid floor structure, and the floor panel 2 and the beam 1 are joined using the joint hardware 5 as in the above example. 6 is not provided.
In general, when a steel structure building is used as a house, the base material 6 is often provided. However, in a building other than a house, the base material 6 may not be provided. This modification is for the case where the base material 6 is not provided, and a base that prevents the floor panel 2 from rotating due to a shearing force applied to the floor and causing the floor panel 2 to be sheared as described above. Instead of the material 6, a structure for preventing shear deviation from occurring at side edge portions that abut each other between adjacent floor panels is provided.

In this modification, the structure of the floor panel 2, the beam 1, and the joint hardware 5 is the same as the above example except for the structure for preventing the shear deviation.
A semi-cylindrical notch 82 is formed at a side edge along the longitudinal direction of the floor panel 2. The notches 82 are formed at two locations on the side edge of the floor panel 2 along the longitudinal direction of the floor panel 2, and are arranged at positions away from the counterbore 23 from the end surface of the floor panel 2, In addition, the distance between the two notch portions 82 is longer than the distance to the notch portion 82 closer to the end face.

Further, the notch 82 is opened to the upper surface side of the floor panel 2, but the lower surface side is closed. Further, since the notch 82 is semicircular, the string side is not open to the side surface of the floor panel 2 but a semicircular arc.
In the state where the floor panels 2 are laid down as described above, the notches 82 between the side edge portions of the adjacent floor panels 2 are arranged so that the open sides of the side surfaces overlap each other, and are in a columnar shape extending over the two floor panels 2 It becomes a recessed part. The recess is in a state where the bottom is closed.

  When, for example, mortar as a hardening material is injected into the notched portion 82 arranged to overlap the adjacent floor panel 2, a hole (concave portion) formed from the two notched portions 82 as described above has a lower side. Since it is in the closed state, the mortar is accumulated without flowing out, and the accumulated mortar is cured. Thereby, the movement of the direction shifted | deviated along a side surface mutually is prevented by the shear force applied between adjacent floor panels. That is, the shear stress is transmitted between the floor panels 2 by the mortar as the movement restricting member existing across the two floor panels in the notch 82.

Therefore, when shearing force is applied to the floor surface and the parallel beams 1 supporting the both ends of the floor panel 2 try to shift, the individual floor panels 2 rotate and follow this, A shear displacement occurs between the two, but this shear displacement is prevented by injecting mortar into the adjacent notch portions 82, resulting in a rigid floor structure.
Moreover, the semicylindrical notch part 82 can be formed with a general installation or tool, and the increase in cost by the process of the floor panel 2 can be prevented. Moreover, the usage-amount of the mortar as a hardening | curing material is few, and it can prevent the increase in cost. In addition, mortar (in addition to the above-mentioned grout material or concrete may be used as the hardening material) is simply injected into the hole, so that workability is good. Thereby, even if there is no base material 6, the effect similar to the said example can be show | played.

1 Beam (steel beam)
11 Pin hole 2 Floor panel 22 Bolt hole 3 Flange 5 Bonding hardware (joining member)
6 Base material (movement restriction member)
51 Pin 52 Temporary fixing spring (Temporary fixing member)
53 Bolt 54 Base plate (base member)
55 Beam contact portion 56 Panel contact portion 59 Washer 77 Nut 82 Notch

Claims (6)

A rigid floor structure comprising floor panels spread and spread between steel beams arranged in parallel to each other,
A joining member that joins an end of a floor panel placed on the steel beam and the steel beam, and a movement regulating member that is provided across the adjacent floor panels and regulates relative movement between the floor panels. ,
The joint member includes a base member integrally provided with a beam contact portion that contacts the lower surface of the flange of the steel beam and a panel contact portion that contacts the lower surface of the floor panel, and extends upward from the beam contact portion. Out, a pin inserted into the pin hole provided in the flange from below, a bolt extending from the panel contact portion upward and inserted into the bolt hole provided in the floor panel from below, A temporary fixing member that engages with the steel beam while elastically deforming from the lower side of the steel beam and temporarily fixes the joining member to the steel beam;
The bolt is inserted into the pin hole of the flange, the bolt is inserted into the bolt hole of the floor panel, and the joining member is temporarily fixed to the steel beam by the temporary fixing member. The joint member is fastened to the floor panel by a washer and a nut,
A rigid floor structure in which a wet material is filled in a gap between the bolt and the bolt hole.   The rigid floor structure according to claim 1, wherein the movement restricting member is a plate-like base material that is disposed between the adjacent floor panels and is fixed to the upper surface of the floor panel. .   The movement restricting member is a hardened material that is filled and hardened in a notch provided in a side edge portion of the floor panel so as to overlap between adjacent floor panels to form one concave portion. The rigid floor structure according to claim 1. A rigid floor construction method in which a floor formed by laying and laying floor panels between steel beams arranged in parallel to each other is a rigid floor structure,
A base member integrally provided with a beam contact portion that contacts the lower surface of the flange of the steel beam and a panel contact portion that contacts the lower surface of the floor panel; and the flange extending upward from the beam contact portion, A pin inserted into the pin hole provided in the bottom, a bolt extending upward from the panel abutting portion and inserted into a bolt hole provided in the floor panel, and a bottom of the steel beam Using a joining member provided with a temporary fixing member that engages with the steel beam from the side while elastically deforming and temporarily fixes the joining member to the steel beam,
The pin is inserted into the pin hole of the flange, the bolt is inserted into the bolt hole of the floor panel, and the joining member is temporarily fixed to the steel beam by the temporary fixing member. Fastening the joining member to the floor panel with bolts, washers and nuts,
Fill the gap between the bolt and the bolt hole with a wet material,
A rigid floor construction method, wherein a movement restricting member for restricting relative movement between the floor panels is provided across the adjacent floor panels.   When providing a movement restricting member for restricting relative movement between the floor panels across the adjacent floor panels, a plate-like base material as the movement restricting member is disposed across the adjacent floor panels. The rigid floor construction method according to claim 4, wherein the rigid floor construction method is fixed to an upper surface of the floor panel.   When a movement restricting member for restricting relative movement between the floor panels is provided across the adjacent floor panels, a notch is formed on a side edge of each floor panel so as to form an integral recess between the adjacent floor panels. The rigid floor structure according to claim 4, wherein the notch is filled with a curing material as the movement restricting member and cured.

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