JP4864750B2 - Joining hardware for steel house, joining structure and method of steel house structural material - Google Patents

Description

  The present invention relates to a steel house joint metal that can be joined to an open end of a box-shaped steel applied to a floor joist constituting a floor panel of a steel house, and a joining structure and method of a steel house structural material.

  A steel house is a house that can be said to be a two-by-four version of a steel frame, and refers to a house with a steel-based panel structure made up of a frame material and a structural face material made of a thin, lightweight steel having a thickness of about 1 mm.

  The steel house frame material uses a large number of channel steel formed by roll forming a thin steel plate having a thickness of about 1.0 to 1.6 mm, and a web and flanges integrally connected to both ends thereof. A frame of a building is constructed by assembling this into a rectangle as a vertical frame material and a horizontal frame material. Further, the frame material is formed so that the width dimension thereof meets a predetermined specification. When constructing a steel house, it is common to construct a reinforcing frame material in which a plurality of frame materials are joined with a drill screw, and to construct the main frame of the building by joining these steel materials with a drill screw ( For example, see Patent Document 1.)

  7 (a) to 7 (c) show a conventional frame structure constituting the floor panel 101 of the steel house. In the frame structure constituting the floor panel 101, the outer frame is constituted by end joists 102 and side joists 103, and a plurality of floor joists 105 are provided at predetermined intervals in parallel with the side joists 103. The end joists 102 and the side joists 103 are each made of channel steel, and the mutual jolts are inserted into the end joists 102 as shown in the enlarged view of part A shown in FIG. Reinforcing hardware 106 is coupled to the corners where these intersect. Further, the side joists 103 may be provided with reinforcing metal pieces 107 made of grooved steel with lips at predetermined intervals. Further, both ends of the floor joist 105 are coupled to the front and rear end joists 102 as shown in an enlarged view of a portion B shown in FIG. Incidentally, the floor joist 105 has a substantially H-shaped cross section in which the webs of the grooved steel 112 with lips are bonded together.

Generally, a reinforcing metal piece 111 is provided at a joint portion between the ends of the floor joists 105 and the side joists 103 so that the longitudinal direction is the vertical direction. As a result, the load on the floor is transmitted to the end of the floor joist 105 as a shear stress, and this shear stress is transmitted to the wall frame 115 of the lower floor and the ground (foundation) via the reinforcement hardware 111. It becomes possible to make it. Further, in addition to the above-described function, the reinforcement hardware 111 has a function of transmitting the compressive stress generated in the upper floor wall frame 114 to the lower wall wall frame 115 via the floor panel 130. May also bear. Therefore, it is necessary to install the reinforcing hardware 111 so as to be located at the same position in the horizontal direction as much as possible with the upper-level wall frame 114 and the lower-level wall frame 115, and the shape thereof should be the same as much as possible. It is desirable that
JP 2003-147852 A

  In recent years, instead of laminating the lip groove steel 112 as the floor joist 105, for example, a box cross-section steel 121 as shown in FIG. 8 may be applied. The box cross section steel 121 is composed of a web 122 having two surfaces and a flange 123 straddling the web 122. The box cross section steel 121 is formed into a cross section box shape by bending a thin steel plate by roll forming and caulking the end portion. Welding may be performed instead of caulking, but caulking is cheaper and more general. The caulking part 124 formed by caulking is usually formed on the inner surface in order to improve the appearance of the box cross section steel 121.

  Such a box cross-section steel 121 has a cross-sectional performance substantially equivalent to the case where the cross-section H-shaped steel with the lip-attached groove-shaped steel 112 is bonded as described above, and is lightweight and economical. For this reason, in the future, it is considered that the box cross-section steel 121 is often used for the frame structure of the steel house.

  By the way, this box cross section steel 121 has two webs 122, and it is necessary to transmit the compressive stress and shear stress transmitted from the upper floor to the lower floor via the two webs 122. is there. For this reason, when joining the edge part of the box cross-section steel 121 to the end joist 102, it becomes necessary to provide a metal fitting for each web 122.

  FIG. 9 is a view of the end portion of the box cross section steel 121 as the floor joist joined to the end joist 102 as viewed from above. The joining hardware 131 is joined to the web 122 of the box section steel 121.

  However, it is uneconomical to provide two joint hardwares for one end of the box section steel 121 just to transmit the compressive stress from the upper floor to the lower floor, resulting in an increase in construction cost. . Further, since the wall frame 115 (114) is provided on the box cross section steel 121 as the floor joist, the horizontal position is shifted from the joint hardware 131, and the compression reinforcement by the joint hardware 131 is performed. There is a problem that the function cannot be fully exhibited.

  Further, in order to eliminate the displacement of the horizontal position of the wall frame 115 (114) in the horizontal direction, a metal joint is attached to the inside of the box cross section steel 121 at the same horizontal position as the wall frame 115 (114) shown in FIG. A method of arranging is also conceivable. However, since the crimped portion 124 is formed on the inner side surface of the box cross-section steel 121, this becomes a barrier, and there is a problem that it is impossible to insert the metal joint inside.

  Therefore, the present invention has been devised in view of the above-mentioned problems, and the object of the present invention is to provide a caulking portion in a steel house that uses a box-shaped box-shaped steel that has been crimped as a floor joist. Provided are a steel house joint metal, a steel house structural material joint structure and method that can be easily inserted into a box cross-section steel without being bent and that stress can be reliably transmitted to the lower floor. There is to do.

  In order to solve the above-described problems, the present inventor has a web, a first flange, a second flange that is wider than the first flange, and a first flange provided at the tip of the first flange. 1 to the opening end of the box-shaped steel, in which the first lip and the second lip formed on the tip of the second flange and spaced apart from the first lip are formed in advance. By inserting first from the first flange, the inner surface of the second lip in the joint metal can be joined to the outer surface of one side plate in the box-shaped steel, and the outer surface of the web in the joint metal is joined to the box-shaped steel. It is possible to join to the inner surface of another side plate, and the second flange in the joint hardware can be joined to the end joists constituting the floor panel. The method was invented.

  In the present invention, the distance between the outer surface of the first lip and the inner surface of the second lip is set so that the caulking portion can be easily inserted into the box cross-section steel without becoming a barrier. It is characterized by being equal to or greater than the thickness of the crimped portion formed on the inner surface of one side plate of the section steel.

  That is, the metal fitting for steel house to which the present invention is applied is for a steel house that can be joined to the open end of box-shaped steel applied to the floor joists constituting the floor panel of the steel house in order to solve the above-mentioned problems. In the metal joint, a first flange that is inserted into the opening end first, a second flange that is wider than the first flange and that can be joined to the end joists constituting the floor panel; The first lip provided at the tip of the first flange and the tip of the second flange are spaced apart from the first lip and the inner surface thereof is the box shape. A second lip that can be joined to the outer side surface of one side plate of steel and a web whose outer surface can be joined to the inner side surface of the other side plate of the box-shaped steel form a thin and light steel plate in a rectangular shape. In The distance between the outer side surface of the first lip and the inner side surface of the second lip is formed by brazing, and the distance of the caulking portion formed on the inner side surface of one side plate of the box-shaped steel is It is characterized by being more than this.

  In addition, in order to solve the above-described problems, a method for joining a steel house structural material to which the present invention is applied has a joint metal fitting at the opening end of a box-shaped steel applied to a floor joist constituting a floor panel of a steel house. In a method for joining steel house structural members to be joined, a thin flanged light steel plate is bent into a rectangular cross section, whereby a web, a first flange, and a second flange that is wider than the first flange. A first lip provided at the tip of the first flange, and a second lip provided at the tip of the second flange and spaced apart from the first lip. Further, the separation distance between the outer surface of the first lip and the inner surface of the second lip is not less than the thickness of the crimped portion formed on the inner surface of one side plate of the box steel. The joint metal fitting is inserted into the opening end of the box-shaped steel first from the first flange, and the inner surface of the second lip in the joint metal is connected to the outside of one side plate of the box-shaped steel. While joining to the side, the outer surface of the web in the joint metal is joined to the inner surface of the other side plate of the box-shaped steel, and the second flange in the joint metal is connected to the end joist constituting the floor panel. It is characterized by joining.

  In the present invention having the above-described configuration, the distance between the outer surface of the first lip and the inner surface of the second lip is the thickness of the crimped portion formed on the inner surface of one side plate of the box-shaped steel. That's it. Thereby, it becomes possible to easily insert the joining hardware into the floor joists without the first lip and the first flange colliding with the caulking portion. Further, the second lip is intentionally joined not from the inner surface of the web but from the outer surface. Thereby, the second lip can be joined to the web without the caulking portion being a barrier.

  Further, the present invention having the above-described configuration also has an advantage that the hardware can be easily joined without escaping by the procedure of joining the web and the web after joining the second lip.

  In particular, the arrangement position of the joint hardware in the horizontal direction is substantially the same as that of the vertical frame member. For this reason, the compressive stress generated in the vertical frame material on the upper floor can be smoothly transmitted to the vertical frame material on the lower floor via this joint hardware. Can be fully exhibited.

  In addition, the floor joist configured as a box cross-section steel has two webs, so shear stress and compressive stress are transmitted to each web. For this reason, it is necessary to apply compression reinforcement for each web. In the present invention, the second lip is joined to the web, and the web is joined to the web. Thus, the compression reinforcing function can be exhibited, and as a result, the stress can be reliably transmitted. In addition, it is possible to reduce the number of parts because it is only necessary to provide one joining hardware without providing two different joining hardware for each web as compared with the prior art, which is advantageous in terms of cost. .

  Hereinafter, as the best mode for carrying out the present invention, a structure for joining steel structural members will be described in detail with reference to the drawings.

  Steel houses to which this steel house structural material joint structure is applied have thin, light-weight steel frame material as the main frame element of the entire building, and if necessary, partially thin wooden frame material and structural surface material. Constructed in combination with a lightweight steel frame. This thin lightweight frame steel frame material is composed of a grooved steel with a web and flanges integrally connected to both ends by bending a thin steel plate with a thickness of about 1.0 mm to 1.6 mm. Has been.

  FIG. 1 shows the structure of such a steel house 100. In the steel house 100, a plurality of vertical frame members 2 are raised from the lower frame member 1 at a predetermined interval, and the upper frame member 3 is coupled between the upper ends of the vertical frame members 2. An outer wall panel and an inner wall panel, which will be described later, are attached to the wall frame member 31 composed of the lower frame member 1, the vertical frame member 2, and the upper frame member 3. Further, the steel house 100 is formed with openings 8 such as an entrance 8a and a window 8b.

  The upper frame 3 is supported by side joists 5a and end joists 5b, and both joists 5a and 5b are assembled in a rectangular shape. A plurality of long and short floor joists 10 are provided at predetermined intervals in parallel with the side joists 5a, both ends of the long floor joists 10 are coupled to the front and rear end joists 5b, and one ends of the short floor joists 10 are The front or rear end joist 5b and the other end are connected to the floor beam 12 (or rolling stopper 10d). One end of the opening side joist 10b is coupled to the end joist 5b, and the other end is coupled to the floor opening joist 10a. The floor panel 13 is attached to the floor frame member 42 configured between the floor joists 10 and the floor beams 12.

  FIG. 2 is an enlarged view of a connecting portion (for example, a portion C in FIG. 1) between the end joists 5b and the floor joists 10. In the present invention, a box cross section steel is applied as the floor joist 10. The end portion of the floor joist 10 is fitted into the end joist 5b, and the metal fitting 21 is inserted and fixed from the open end. Incidentally, from the end of the floor joist 10, the vertical frame member 2a is raised toward the upper floor, and the vertical frame member 2b is lowered toward the lower floor. That is, the arrangement position of the joint hardware 21 in the horizontal direction is substantially the same as that of the vertical frame members 2a and 2b.

  As shown in FIG. 3, a floor joist 10 configured as a box cross-section steel has webs 32a (one side plate) and 32b (other side plates) as two side plates and a flange 33 straddling the webs 32a and 32b. It consists of. This floor joist 10 is formed into a box-shaped section by bending a thin steel plate by roll forming and caulking the end portion. Welding may be performed instead of caulking, but caulking is cheaper and more general. The caulking part 34 formed on the web 32a by caulking is usually formed on the inner surface in order to improve the appearance of the floor joists 10. The floor joist 10 made of such box cross-section steel has substantially the same cross-sectional performance as compared with the case where the cross-section H-shape is formed by bonding grooved steel with lips, and is lightweight and economical. It becomes.

  Further, as shown in FIG. 3, the metal joint 21 inserted from the opening end 36 in the floor joist 10 is a second width that is wider than the web 22, the first flange 23, and the first flange. A flange 24, a first lip 25 provided at the tip of the first flange 23, and a second lip provided at the tip of the second flange 24 and spaced apart from the first lip. A lip 26 is formed. The metal joint 21 is formed by bending a thin lightweight steel plate into a rectangular cross section.

  The first flange 23 is the side that is first inserted into the opening end 36, and is configured to have a shorter width than the second flange 24. The 2nd flange 24 is set as the structure which can be joined also to the end joist 5b which comprises the floor panel 13. As shown in FIG. Incidentally, when the metal fitting 21 is inserted into the floor joist 10 through the opening end 36, as shown in FIG. 3, a caulking portion 34 is formed on the side where the first lip 25 is provided. It is assumed that the web 32a side is adjusted.

  The length L1 in the longitudinal direction of the first flange 23 may be shorter than the length L2 in the longitudinal direction of the second flange 24 so as not to perform the compression reinforcing function. Thereby, the shape of the web 22 is tapered so as to gradually taper from the second flange 24 to the first flange 22, and this can be easily inserted into the floor joist 10. Is possible. Moreover, by providing such a taper, the metal joint 21 can be closely fixed to the floor joist 10 without gaps, and stress can be transmitted reliably, and the quality of the entire steel house can be improved. it can. And since the alignment property of the joining metal object 21 with respect to the floor joist 10 can also be improved, it becomes possible to also improve workability.

  FIG. 4 is a view in which a cross-sectional configuration in a state in which the metal fitting 21 is fitted to the end portion of the floor joist 10 and further joined to the joist 5b is viewed from above. FIG. 4 (a) shows the joint form of the opening and the load-bearing wall end, and FIG. 4 (b) shows the joint form in the other general part.

  The inner surface of the second lip 26 in the metal fitting 21 is brought into contact with and joined to the outer surface of the web 32a in the floor joist 10, and the outer surface of the web 22 in the metal fitting 21 is brought into contact with the inner surface of the web 32b. In addition, the second flange 24 is joined to the end joist 5b. Incidentally, about this joining, you may join by the drill screw 30 and may join via a volt | bolt and a nut. If the drill screw 30 is used for joining, the joining position is two places on the second lip 26 and the web 32a, two places on the second flange 24 and the end joist 5b, and four places on the web 22 and the web 32b. It is desirable to do. In addition, in the joining form of the opening and the load-bearing wall end portion shown in FIG. 4A, the web of the joining hardware 29 is further brought into contact with the outside of the web 32b for joining.

  As described above, the second lip 26 is spaced outward from the first lip 25. That is, when the second lip 26 is considered as a reference, the first lip is spaced inward. For this reason, when the second lip 26 is brought into contact with and joined to the outer surface of the web 32a, the first lip 25 is fixed in a state of being separated from the web 32a inward.

  Here, the distance between the outer surface of the first lip 25 and the inner surface of the second lip 26 is L3. Further, the thickness of the caulking portion 34 is L4. Incidentally, the thickness L4 of the caulking portion 34 includes the thickness of the web 32a. At this time, if the separation distance L3 is equal to or greater than the thickness L4 of the caulking portion 34, the first lip 25 and the first flange 23 do not hit the caulking portion 34.

  That is, in the present invention, the first lip 25 and the first flange 23 do not collide with the caulking portion 34 by making the separation distance L3 equal to or greater than the thickness L4 of the caulking portion. The metal fitting 21 can be easily inserted into the floor joist 10. Further, the second lip 26 is intentionally joined not from the inner surface of the web 32a but from the outer surface. Thereby, the 2nd lip | rip 26 can be joined to the web 32a, without the crimping process part 34 becoming a barrier.

  In particular, the horizontal position of the metal fitting 21 is substantially the same as that of the vertical frame members 2a and 2b as shown in FIG. For this reason, the compressive stress generated in the vertical frame member 2a on the upper floor can be smoothly transmitted to the vertical frame member 2b on the lower floor via the joint metal member 21. It is possible to sufficiently exert the compression reinforcing function.

  Further, the floor joist 10 configured as a box cross-section steel has two webs 32a and 32b, so that shear stress and compressive stress are transmitted to each of the webs 32a and 32b. For this reason, it is necessary to apply compression reinforcement to each of the webs 32a and 32b. In the present invention, the second lip 26 is joined to the web 32a, and the web 22 is attached to the web 32b. Since they are joined, it is possible to exert a compression-reinforcing function and to transmit stress reliably. In addition, it is possible to reduce the number of parts because it is only necessary to provide one bonding hardware 21 without providing two different bonding hardware for each of the webs 32a and 32b as compared with the prior art. Is also advantageous.

  Next, a method for joining steel house structural materials to which the present invention is applied will be described.

  As shown in FIG. 5 (a), the metal joint 21 is inserted through the open end 36 of the floor joist 10 (see step S1 in FIG. 5 (a)). At this time, the insertion is performed under the positional relationship in which the first flange 23 is at the head and the side on which the first lip 25 is formed is the caulking part 34 side. As a result, as shown in FIG. 5B, the first lip 25 and the first flange 23 can be inserted into the floor joist 10 without hitting the caulking portion 34, and the second The inner surface of the lip 26 can be kept stationary in contact with the outer surface of the web 32a.

  Next, a drill screw 30 is driven on the second lip 26 and the web 32a as shown in step S2 in FIG. 5B to join them together. Further, as shown in step S2, the drill screw 30 is placed on the web 22 and the web 32b so that they are joined to each other. Thus, after joining the metal joint 21 to the floor joists 10, they are fitted to the end joists 5b as shown in step S3.

  Finally, as shown in step S4 in FIG. 5 (c), the drill screws 30 are respectively placed on the second flange 24 and the end joist 5b to join them together. As a result, it is possible to create the joint structure according to the present invention as described above.

  Hereinafter, specific examples of the metal joint 21 to which the present invention is applied will be described. FIG. 6 shows a side view of the metal joint 21. In this example, the width of the first lip 25 is 12 mm, the width of the second lip 26 is 30 mm, the width of the first flange 23 is 43.5 mm, the width of the second flange 24 is 50.5 mm, The length of the web is 89 mm. Incidentally, the thickness of the metal joint 21 is 1.2 mm. Further, the separation distance is set to 5.8 mm (7 mm-1.2 mm).

  In FIG. 6, the length L1 in the longitudinal direction of the first flange 23 in the metal fitting 21 is 233-0.2 mm, and the length L2 in the longitudinal direction of the second flange 24 is 233 ± 0.0 mm. . That is, the length L1 in the longitudinal direction of the first flange 23 is configured to be 0.2 mm shorter than the length L2 in the longitudinal direction of the second flange 24. As a result, a taper is formed so as to gradually taper from the second flange 24 to the first flange 22. In particular, it has been found that a more optimal taper is formed by configuring L1 to be 0.2 mm shorter than L2 while the length of the web 22 is 89 mm.

It is a figure for demonstrating per structure of a steel house. It is an enlarged view of the joint part of edge joist and floor joist. It is a perspective view of box section steel and a joint metal fitting. It is the figure which looked at the cross-sectional structure of the state which made the joint metal fitting fit to the edge part of a floor joist, and was further joined to the joist. It is a figure for demonstrating the joining method of the structural material for steel houses to which this invention is applied. It is a figure shown about the specific Example in the joint metal fitting which applied this invention. It is a figure which shows the conventional frame structure which comprises the floor panel of a steel house. It is a figure for demonstrating the structure of box cross-section steel. It is the figure which visually recognized the edge part of the box cross-section steel as a floor joist joined to the end joist from the top.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Lower frame material 2 Vertical frame material 3 Upper frame material 5a Side joist 5b End joist 8a Entrance / exit 8b Window 10 Floor joist 13 Floor panel 21 Joint metal | hardware 22 Web 23 1st flange 24 2nd flange 25 1st lip 26 1st Two lips 32a, 32b Web 33 Flange 34 Caulking part 36 Open end 42 Floor frame material 100 Steel house

Claims (5)

In the steel house joint hardware that can be joined to the open end of the box-shaped steel applied to the floor joists constituting the floor panel of the steel house,
A first flange that is inserted into the opening end first, a second flange that is wider than the first flange and that can be joined to an end joist constituting the floor panel; and the first A first lip provided at the front end of the flange and a second lip provided at the front end of the second flange and spaced apart from the first lip. The second lip that can be joined to the outer side surface of the side plate and the web whose outer surface can be joined to the inner side surface of the other side plate of the box-shaped steel bends the thin lightweight steel plate into a rectangular cross section. Formed by
The distance between the outer surface of the first lip and the inner surface of the second lip is set to be equal to or greater than the thickness of the crimped portion formed on the inner surface of one side plate of the box-shaped steel. Special steel fitting for steel house. The length of the longitudinal direction of the said 1st flange is comprised shorter than the length of the longitudinal direction of the said 2nd flange. The joining metal fitting for steel houses of Claim 1 characterized by the above-mentioned.   The steel house joint metal fitting according to claim 1 or 2 is inserted into the open end of the box-shaped steel, and the inner surface of the second lip of the joint metal hardware contacts the outer surface of one side plate of the box-shaped steel. The outer surface of the web in the joint metal is in contact with and joined to the inner side surface of the other side plate of the box-shaped steel, and the second flange constitutes the floor panel. Joint structure of steel house structural material joined to joists. In the joining method of the structural material for steel house, which joins the joint hardware to the open end of the box-shaped steel applied to the floor joists constituting the floor panel of the steel house,
By bending a thin and light steel plate into a rectangular cross section, a web, a first flange, a second flange that is wider than the first flange, and a tip of the first flange are provided. In addition, a first lip and a second lip provided at the tip of the second flange and spaced apart from the first lip are formed in advance, and the outside of the first lip is further formed. The distance between the side surface and the inner side surface of the second lip is such that the joint metal fitting having a thickness equal to or greater than the thickness of the crimped portion formed on the inner side surface of the one side plate of the box shape steel is the same as that of the box shape steel. Into the open end, first from the first flange,
The inner surface of the second lip of the joint metal is joined to the outer surface of one side plate of the box-shaped steel, and the outer surface of the web of the joint metal is joined to the inner surface of the other side plate of the box-shaped steel. And
A method for joining a steel house structural material, characterized in that the second flange of the joint hardware is joined to an end joist constituting the floor panel. The length of the longitudinal direction of the first flange is inserted into the opening end of the box-shaped steel, and the metal fitting is configured to be shorter than the length of the longitudinal direction of the second flange. Item 5. A method for joining steel house structural materials according to Item 4.

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