JP4361341B2 - Mounting structure of metal joists to beams, mounting hardware and floor panels - Google Patents

Description

  The present invention relates to a metal joist attachment structure to a beam, an attachment hardware, and a floor panel.

  In a building such as a house, when a floor panel on the second floor or the like is installed on the floor beam, when the joists provided on the floor panel are installed on the floor beam, the installation is performed from the top. If it is possible, the work is easy and there is little trouble. However, when the joists are made of metal such as steel joists, the cost required to realize the installation from the upper level is likely to be high. It is safe to adopt a mounting structure that works upward from the top.

  However, the upward mounting work is very troublesome, and there is a problem that the physical and mental burden on the worker is very large. Moreover, when the joist is made of metal such as steel, the processing cost for the joist is likely to be high.

  In view of the above problems, the present invention can easily attach a metal joist to a beam with little physical and mental burden despite upward work, and is advantageous in terms of cost. It is an object of the present invention to provide an attachment structure and the like that can be realized.

The above problem is a mounting structure for attaching an internal hollow metal joist to a beam,
The joist has an opening on the bottom side, and lip portions that project inward are provided on both sides of the side face of the joist, and the opening has a dimension in the width direction of the joist than the dimension in the length direction of the joist. Is set too small,
Mounting hardware to attach joists to the beam is provided,
The mounting hardware includes a first hardware material, a second hardware material, and male and female screw materials,
The first hardware is
On one end side, with a claw part that sandwiches the beam from the top and bottom direction in cooperation with the bottom surface side of the joist,
On the other end side, it is provided with a pair of leg portions that rises along the side surface on both side surfaces of the joist, and a joist contact portion that contacts the lower surface side of the joist at the intermediate portion,
It is provided with a screw through hole penetrating in the vertical direction at an intermediate position between the claw part and the leg part,
The second hardware is
It can be inserted into the joist through the opening on the underside of the joist. By rotating, it projects over the upper surface of both lip parts sandwiching the opening on the lower side of the joist. With a joist abutment that is regulated,
It consists of a screw hole that penetrates the center of rotation vertically.
One of the male and female screw members is integrally attached to the second hardware member, the other is disposed on the lower surface side of the first hardware member, and the male screw rod portion of the male screw member is the first. 1, passed through the screw holes of the second hardware material, screwed together,
The mounting hardware can be inserted into the joist through the opening on the lower surface side of the joist in the threaded state of the male and female screw members,
In the inserted state, the pair of legs of the first hardware member rises along both sides of the joists and comes into contact with both sides of the joists and is prevented from rotating. Is rotated in the screwing direction, and the second hardware member follows and rotates, and the joisting contact portion of the second hardware material comes into contact with both side surfaces in the joist and the second hardware material is prevented from rotating. And then
When the screw material on the lower side is further rotated and the male and female screw materials are fastened together, both lip portions of the opening on the underside of the joist are attached to each joist contact portion of the first and second hardware members. The first metal material is fixed to the bottom side of the joist and is sandwiched between the nail portion of the first hardware material and the lower surface of the joist, and the joist is attached to the beam. It is solved by a metal joist mounting structure to the beam.

  In this mounting structure, both the legs of the first hardware material of the mounting hardware are made to run along both sides of the joist, and the second hardware material is inserted into the joist through the opening of the metal joist. The mounting hardware can be easily attached to the joists simply by rotating the screw material from the outside in the screwing direction.

  In other words, during the rotation of the screw material, the first hardware material does not rotate following the rotation of the screw material because its both leg portions abut on the side surface portion of the joist. It is not necessary to hold the first hardware material by hand, so that the mounting hardware can be easily attached to the joists.

  In addition, the second hardware material is inserted into the joist through the opening of the metal joist. However, if the screw member is rotated in the screwing direction as described above, the screw member is rotated and displaced in accordance with the screw member. The abutting portion projects to the side of both lip portions of the joist and comes into contact with the side surface portion in the joist, and subsequent follow-up rotation is restricted. Therefore, the rotation of the screw material in the screwing direction is to project the joist abutment portion of the second hardware material to the side of both lip portions of the joist or to position the second metal material in the projecting state. The mounting hardware can be easily attached to the joists.

  Note that the mounting hardware to the joists may be performed before the joists are installed on the beam, or may be performed in an upward operation with the joists installed on the beams.

  And, the mounting of the joist to the beam is to install the joist on the beam, and to place the claw part provided on the first hardware material of the mounting hardware attached to the joist on the lower surface side of the beam, After that, if the screw material is tightened from the bottom, the joist can be attached to the beam, and the metal joist can be easily attached to the beam with little physical and mental burden despite the upward work. it can.

  That is, as described above, when the screw material is tightened, the first hardware material of the mounting hardware does not rotate together, and the second hardware material is also restricted in rotational displacement, and both the lip of the joist abutting portion is the joist Because it is held in the state of projecting to the side of the part, in the upward work, while holding the tool in one hand with a tool, hold the first hardware material with the other hand, and do not rotate the second hardware material together It can be easily attached without using physical strength and without scuffing nerves despite upward work.

  Moreover, it is only necessary to machine one opening on the lower surface of the metal joist, and the machining of the metal joist can be carried out in an advantageous manner. If the joist is provided with a portion, there is no need to process the opening.

In the mounting structure described above, the second hardware member includes a double turn restricting portion on the lower side of the joist abutting portion,
The double turn restricting portion is configured such that the second hardware member is lowered by the screwing of the screw material from the state in which the second hardware member is inserted into the joist together with the double turn restricting portion through the opening on the lower surface side of the joist, and the joist contact portion. In the process of contacting the upper surface side of both lip portions of the opening on the lower surface side of the joist, it enters into the opening portion of the joist and contacts both edges of the lip portion so as to regulate both rotations of the second hardware member. It is good to have been made.

  In this case, in the mounting state of the mounting hardware to the joist, the both-turn restricting portion enters the joist opening and contacts the lip portion in the rotation direction, and the second hardware member rotates in either direction within the joist. Therefore, the second hardware is prevented from rotating in the anti-screw tightening direction, and it is ensured that the second hardware is pulled out from the opening of the joist and the fitting is detached from the joist. Can be prevented.

  In particular, when mounting the mounting hardware to the joists before installing the joists on the beam, for example, the mounting hardware is pre-installed on the joists in a factory, etc., and then transported to the construction site. When installing joists on the top, it is possible to reliably prevent mounting hardware from falling off the joists when carrying joists or carrying joists on site.

  In particular, in the floor panel in which the above-mentioned metal joists are attached to the lower surface of the floor covering material, when the above-mentioned mounting hardware is pre-attached to the metal joists, the floor panel is transported from the factory to the construction site. In addition, when carrying the floor panel on site, it is possible to reliably prevent the mounting hardware from falling off the floor panel.

  In addition, in storage of the floor panel at the site, factory, or transportation, the joist can be supported through the mounting hardware, and the mounting hardware can have a function as a storage spacer.

  Further, in the above mounting structure, the mounting hardware can be moved in the longitudinal direction of the joist in relation to the joist opening in the assembled state to the joist before tightening, and the claw portion is placed on the lower surface side of the beam. It is preferable that the position can be changed between the advanced position where the vehicle has advanced and the exit position where the beam has exited from the lower side of the beam.

  In this case, after installing joists on the beam, the claw part of the mounting hardware should be advanced from the exit position to the bottom of the beam and tightened, so the claw part of the mounting hardware is positioned below the beam. Can be easily done by upward work.

  Since the present invention is as described above, it is possible to easily attach the metal joists to the beam with little physical and mental burden despite the upward work, and this is advantageous in terms of cost. Can be realized.

  Next, the best mode for carrying out the present invention will be described with reference to the drawings.

  The embodiment shown in FIGS. 1 to 5 relates to a mounting structure for attaching a joist provided on an upper floor panel such as the second floor of a building such as a house to a floor beam. In FIG. Is a floor panel, and the floor beam 1 is made of H-shaped steel having upper and lower flanges and a web connecting these flanges.

  The floor panel 2 is formed by attaching a plurality of steel joists 4... As metal joists in parallel to each other at predetermined intervals on the lower surface of the floor covering 3. The floor panel 2 is installed on the floor beam 1 such that the end of the joists 4... Is supported on the upper surface of the upper flange 1 a of the floor beam 1.

  In the floor panel 2, an opening 5 having a square shape or the like used for attaching the joist 4 to the floor beam 1 is formed on the bottom surface of the joist 4 as shown in FIG. Each of both side portions on the side surface side of the joist 4 is provided with lip portions 6 and 6 projecting inwardly. The dimension of the opening 5 in the joist length direction is set larger than the dimension in the joist width direction.

  It is the mounting hardware 7 shown in FIGS. 1 and 2 that is used to mount the joist 4 to the floor beam 1 using the opening 5. The mounting hardware 7 includes the first hardware material 8, It is composed of a two-metal material 9 and male and female screw materials 10 and 11, and the first and second metal materials 8 and 9 are both made of a metal plate bending product.

  The first hardware member 8 has a groove shape, and at one end thereof, as shown in FIG. 4, a groove that sandwiches the floor beam 1 from above and below in cooperation with the lower surface side of the joist 4. A pair of leg portions 13 and 13 rising along the side surface on both sides of the joist 4 as shown in FIG. As shown in FIG. 4, the intermediate portion is a groove-shaped joist abutting portion 14 that comes into contact with the lower surface side of the joists 4, specifically, the lower surfaces of the lip portions 6 and 6. Further, a screw through hole 15 penetrating in the vertical direction is provided in the bottom wall portion of the joist abutting portion 14 at an intermediate position between the claw portion 12 and the leg portions 13 and 13. The wall portion around the screw hole 15 is raised to the side in the groove and the bottom surface side is recessed, and the head portion of the male screw material 10 is accommodated in the recessed portion so that the head portion does not protrude downward. ing.

  The second metal material 9 has a T-shaped groove shape when viewed from the side. The upper half of both side walls, which are the upper half, serves as a joist abutting portion 17, and the lower half of both side walls, which is the lower half. The bottom wall and the bottom wall are the restricting portions 18, and any of the portions 17 and 18 can be inserted into the joist 4 through the lower face side opening 5 of the joist 4 by directing the groove direction in the longitudinal direction of the joist opening 5. Thus, by rotating in the screw tightening direction in the inserted state, the joist abutting portion 17 projects to the upper surface side of both lip portions 6 and 6 sandwiching the opening 5 on the lower surface side of the joist 4 and in this projecting state, the joist 4 The inner side surfaces 4a and 4a are in contact with each other to restrict the rotation.

  In addition, in this embodiment, the joist abutting portion 17 is rotated 90 ° from the inserted state and is brought into contact with the side surface portions 4a and 4a in the joist 4 so that the rotation is restricted. One end of both side walls of the upper half of the groove shape is retracted on one end side, and the other end of both side walls of the upper half of the groove shape is retracted on the other end side. It is designed so as not to interfere with the side surface portions 4a, 4a. Note that this structure is merely an example, and needless to say, such a structure is not necessary.

  Further, the both-directions restricting portion 18 is set to have a length dimension smaller than the length dimension of the joist abutment portion 17 and slightly smaller than the width dimension of the joist opening 5, and In the state where the contact portion 17 is rotated by 90 ° from the inserted state and is in contact with the side surface portions 4a, 4a in the joist 4 and the rotation is restricted, the joist opening 5 can be smoothly inserted into the joist opening 5. In this intrusion state, both rotations of the second metal material 9 are regulated by abutting against the edges of both lip portions 6 and 6 of the joist opening 5.

  Further, the bottom wall portion of the second metal material 9 is provided with a screw through hole 19 penetrating in the vertical direction at the center of rotation, and a hexagonal female screw material is formed in the groove so as to communicate with the screw through hole 19. A nut 11 is set, and the nut 11 is provided integrally with the second hardware 9 by fitting, welding, or the like.

  And the hexagon socket countersunk bolt 10 as a male screw material is passed from the bottom to the screw through holes 15 and 19 of the first and second hardware members 8 and 9, as shown in FIG. 9 is screwed into a nut 11 attached to 9 to form one mounting hardware 7. The length of the male screw member 10 is set such that, for example, the joist abutting portion 14 of the first hardware member 8 is brought into contact with the lower surface of the joist 4 as shown in FIGS. 7 (b) and 9 (e). In such a state, the dimension is set such that the entire second metal material 9 can be present in the joist 4.

  The mounting hardware 7 to the joists 4 may be performed with the floor panel 2 having the openings 5 formed in the joists 4 installed on the floor beam 1 at the construction site, or at the factory or the like. Although it may be pre-attached to the panel 2, in this embodiment, an attachment method in the case of the latter pre-installation method will be described.

  That is, as shown in FIGS. 7 (a) and 7 (b), with the joist 4 turned upside down and the opening 5 facing up, both legs 13 of the first hardware 8 of the mounting hardware 7 from above. 13 is inserted into the joist 4, the entire second hardware 9 is inserted into the joist 4 through the joist opening 5, and the joist abutment 14 of the first hardware 8 is placed on the upper surface of the joist 4. Make contact.

  Thereafter, as shown in FIGS. 8 and 9 (e), the male screw member 10 is rotated in the screwing direction. The first hardware member 8 has both legs 13 and 13 fitted on the side surface side of the joist 4 and the both legs 13 and 13 are separated from the center of rotation in the radial direction. During the rotation of 10, it is not necessary to hold the first hardware material 8 by hand, and the male screw material 10 can be easily rotated.

  Further, in the initial stage of rotation of the male screw material 10, the second hardware material 9 is rotationally displaced following the rotation of the male screw material 10 as shown in FIGS. 8 (d) and 9 (e). The joist abutment portion 17 of the second metal material 9 protrudes toward the lip portions 6 and 6 of the joist 4 and, when rotated by 90 °, the joist abutment portion 17 comes into contact with both side surfaces in the joist 4. The second metal material 9 is prevented from rotating.

  And in this embodiment, since the both-turns control part 18 is provided in the 2nd metal material 9, as shown in FIG. 9 (f) by further progressing screwing of the external thread material 10, When the both-turns restricting portion 18 of the second metal material 9 enters the joist opening 5, and further advances the screw and tightens the male screw material 10, the state is maintained while maintaining the inserted state. 9 (G), the joist abutting portion 17 of the second hardware member 9 and the joist abutting portion 14 of the first hardware member 8 sandwich the both lip portions 6 and 6 of the joist opening 5; Thus, the mounting of the mounting hardware 7 to the joists 4 is completed.

  In this assembled state, the mounting hardware 7 can be moved in the joist longitudinal direction in relation to the longitudinal size of the opening 5 of the joist 4 by loosening the male screw material 10.

  Thus, in order to attach the attachment metal 7 to the steel joist 4, all that is required of the steel joist 4 is to form the opening 5, and the attachment metal 7 to the steel joist 4 is required. The processing for attaching the can can be carried out advantageously in terms of cost.

  In this way, the floor panel in which the mounting hardware 7 is assembled to the joists 4 is transported from the factory or the like to the construction site and is installed on the floor beam at the construction site. Even if loosening occurs, the joist contact portion 17 of the second metal member 9 in the joist 4 maintains the state in which the both turn restricting portion 18 has entered the joist opening 5, and in any direction Cannot be rotated, so that the mounting hardware 7 does not fall off the joists 4.

  Further, when the floor panel 2 is stored on site, at a factory, or during transportation, the joist 4 can be brought into a support state via the mounting hardware 7, and the mounting hardware 7 can function as a storage spacer.

  The floor panel 2 is attached to the floor beam 1 by installing the floor panel on the floor beam, and then loosening the male screw material 10 from below as shown in FIG. The eight claw portions 12 are slid from the retracted position shown in FIG. 10 to the advanced position shown in FIG. When the male screw member 10 is retightened, the upper flange 1 a of the floor beam 1 is sandwiched between the joist 4 and the claw portion 12 of the mounting hardware 7, and the floor panel 2 is attached to the floor beam 1. The joists 4 and the claw portions 12 of the mounting hardware 7 may sandwich the upper flange 1a of the floor beam 1 in a tightened state or may simply be sandwiched in an untightened state. Although not shown, it is preferable to provide a vibration isolating material such as a vibration isolating rubber between the joists 4 and the upper flange 1a of the floor beam 1. In this case, it is preferable that the vibration isolator is attached to the floor panel in advance together with the mounting hardware and the mounting hardware protects the vibration isolating material.

  These operations after the installation of the floor panel are performed from the bottom upward, but when the male screw material 10 is loosened or tightened, the first hardware material 8 has its legs 13 and 13 turned to the joists 4. The second metal member 9 does not rotate due to being externally fitted, and the both-turns restricting portion 18 enters the joist opening 5 so that it does not rotate unintentionally. The joist 4 can be easily attached to the body with little physical and mental burden despite the upward work.

  Although the embodiment of the present invention has been described above, the present invention is not limited to this, and various modifications can be made without departing from the spirit of the invention. For example, in the above embodiment, the case where the female screw material 11 is integrally attached to the second metal material 9 is shown, but the male and female are reversed and the head of the male screw material is attached to the second metal material 9. The structure may be such that it is integrally attached and the female screw material is screwed from below.

  In the above embodiment, the joist is made of a square steel pipe, but it may be of an internal cavity, for example, it may be a grooved material with a lip that opens downward, in which case The space between the lip portions can be used as an opening, and there is an advantageous aspect that does not require processing for mounting the mounting hardware, and the joist may be a metal joist other than steel.

  Further, in the above-described embodiment, the case where the mounting hardware 7 is attached to the joists 4 by tipping is shown. However, after the floor panel is installed on the floor beam, the mounting hardware to the joists 4 is operated upward from below. 7 may be performed, and even in such a case, the mounting hardware can be easily attached to the joists while being an upward operation.

It is a disassembled perspective view which shows the attachment structure of embodiment. It is a disassembled perspective view of an attachment hardware. It is a partial cross section perspective view which shows the relationship between a floor panel and a floor beam. It is a partial cross section front view of an attachment structure part. 4A is a cross-sectional view taken along the line II of FIG. 4, and FIG. 2B is a cross-sectional view taken along the line II-II of FIG. Fig. (A) is an exploded front view of the mounting hardware, and Fig. (B) is a front view of the assembled mounting hardware. FIGS. 1A and 1B are cross-sectional side views sequentially showing the mounting method together with FIGS. Figures (c) and (d) are plan views of the same section. Figures (e) to (g) are plan views of the same section. The figure (h) and figure (ri) are the same section sectional front views.

Explanation of symbols

1 ... Floor beams (beams)
2 ... Floor panel 3 ... Floor material 4 ... Steel joists (metal joists)
DESCRIPTION OF SYMBOLS 5 ... Opening part 6 ... Lip part 7 ... Mounting hardware 8 ... 1st metal material 9 ... 2nd metal material 10 ... Male screw material 11 ... Female screw material 12 ... Nail | claw part 13 ... Leg part 14 ... Radish contact part 15 ... Screw hole 17 ... joist contact portion 18 ... both-turn restricting portion 19 ... screw through hole

Claims (5)

A mounting structure for attaching an internal hollow metal joist to a beam,
The joist has an opening on the bottom side, and lip portions that project inward are provided on both sides of the side face of the joist, and the opening has a dimension in the width direction of the joist than the dimension in the length direction of the joist. Is set too small,
Mounting hardware to attach joists to the beam is provided,
The mounting hardware includes a first hardware material, a second hardware material, and male and female screw materials,
The first hardware is
On one end side, with a claw part that sandwiches the beam from the top and bottom direction in cooperation with the bottom surface side of the joist,
On the other end side, it is provided with a pair of leg portions that rises along the side surface on both side surfaces of the joist, and a joist contact portion that contacts the lower surface side of the joist at the intermediate portion,
It is provided with a screw through hole penetrating in the vertical direction at an intermediate position between the claw part and the leg part,
The second hardware is
It can be inserted into the joist through the opening on the underside of the joist. By rotating, it projects over the upper surface of both lip parts sandwiching the opening on the lower side of the joist. With a joist abutment that is regulated,
It consists of a screw hole that penetrates the center of rotation vertically.
One of the male and female screw members is integrally attached to the second hardware member, the other is disposed on the lower surface side of the first hardware member, and the male screw rod portion of the male screw member is the first. 1, passed through the screw holes of the second hardware material, screwed together,
The mounting hardware can be inserted into the joist through the opening on the lower surface side of the joist in the threaded state of the male and female screw members,
In the inserted state, the pair of legs of the first hardware member rises along both sides of the joists and comes into contact with both sides of the joists and is prevented from rotating. Is rotated in the screwing direction, and the second hardware member follows and rotates, and the joisting contact portion of the second hardware material comes into contact with both side surfaces in the joist and the second hardware material is prevented from rotating. And then
When the screw material on the lower side is further rotated and the male and female screw materials are fastened together, both lip portions of the opening on the underside of the joist are attached to each joist contact portion of the first and second hardware members. The first metal material is fixed to the bottom side of the joist and is sandwiched between the nail portion of the first hardware material and the lower surface of the joist, and the joist is attached to the beam. A metal joist mounting structure to the beam. The second hardware member includes a double turn restricting portion on a lower side of the joist abutting portion;
The double turn restricting portion is configured such that the second hardware member is lowered by the screwing of the screw material from the state in which the second hardware member is inserted into the joist together with the double turn restricting portion through the opening on the lower surface side of the joist, and the joist contact portion. In the process of contacting the upper surface side of both lip portions of the opening on the lower surface side of the joist, it enters into the opening portion of the joist and contacts both edges of the lip portion so as to regulate both rotations of the second hardware member. 2. A structure for attaching a metal joist to a beam according to claim 1.   The mounting hardware can be moved in the longitudinal direction of the joist in relation to the joist opening in the assembled state to the joist before tightening, and the advancement position where the claw portion has advanced to the lower surface side of the beam and the beam The structure for attaching a metal joist to a beam according to claim 1 or 2, wherein the position can be changed with the exit position retracted from the lower surface side.   A mounting hardware used in the mounting structure according to claim 1 or 2. A floor panel having a metal joist attached to the lower surface of a floor covering,
A floor panel in which the mounting hardware used in the mounting structure according to claim 3 is attached in advance to the metal joist described in the same paragraph, and the metal joist is the joist described in this paragraph.

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