JPH11324112A - Joint method for steel building material and joint structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve workability due to easy construction and shorten the construction period to reduce the cost, when steel building materials are joined together through a tapping screw. SOLUTION: When steel building materials 2, 4 of nearly U-shaped or C- shaped section constituted of webs 21, 41 and a pair of flanges 22a, 22b, 42a, 42b are joined with each other through a tapping screw 60, a joint tool 5 provided with a grip part 51 given pressing force pressing the tapping screw 60, a chuck part 54 fitted with the tapping screw 60, and a U-shaped or L-shaped transmission case 52 forming an opening part 53 between both and connecting together both is used. The chuck part 54 is inserted between a pair of the flanges 42a, 42b, and the grip part 51 is arranged on the outer face side of the flange 42a while avoiding the one flange 42a. By applying pressing force from the outer face side of the flange 42a, the tapping screw 60 is screwed in from the inner face side of the other flange 42b toward the outer face side, and the flange 42b and the steel building material 2 contacted with the flange 42b are joined together.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for joining steel building materials, such as channel steel and lip channel steel, using tapping screws and a joining structure thereof.

[0002]

2. Description of the Related Art Conventionally, for example, on a floor of a steel house, in joining a base material made of a channel steel or a lip channel steel to a beam member, welding, bolt or welding using a bracket, self-drilling, and the like are known. Direct joining using a tapping screw was performed.

[0003]

When a base material is welded to a beam member by welding, the performance may vary depending on the skill of a welding technician. Advanced technology is required for its quality control. In addition, there are various problems such as stress concentration at the weld defect, heat distortion during welding, which requires correction, and post-treatment (such as painting) of the welded part.

As shown in FIGS. 9 and 10, when the base material 3 is joined to the beam member 1 via the bracket 11, the bracket 11 is separately manufactured and the bracket 11 is bolted or welded. It must be attached to the beam member 1. Therefore, the number of parts and the number of man-hours are increased.

[0005] When a self-drilling tapping screw (hereinafter referred to as tapping screw) is used, the above-mentioned problem does not occur. However, as shown in FIG. It is made of a channel steel, and in order to directly join the flange to the beam member 1, a driver insertion hole 61 for screwing the tapping screw 60 into the other flange must be provided, so that extra work is required only. Instead, the rigidity and strength of the base material 3 were reduced. For this reason, there is a case where a reinforcing means for compensating for a decrease in rigidity and strength is provided, and further extra work may be required.

The base materials 3 constituting the floor are mounted on the beam members 1 at intervals of, for example, 300 to 400 mm. Therefore, at least several tens, and in many cases, 100 or more base materials 3 must be joined to the beam members 1. Must. For this reason, the above-mentioned problems have caused delays in the construction period and increased costs, and an early solution has been desired.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems. In joining steel building materials with tapping screws, the construction is easy, the workability is improved, the construction period is shortened, and the cost is reduced. It is an object of the present invention to obtain a joining method and a joining structure for steel building materials that can be used.

[0008]

SUMMARY OF THE INVENTION A method of joining steel building materials according to the present invention is to join steel building materials having a substantially U-shaped cross section or a substantially C-shaped cross section comprising a web and a pair of flanges with tapping screws. In this case, a grip portion to which a pressing force for pressing the tapping screw is applied, a chuck portion to which the tapping screw is attached, and a U-shaped or L-shaped transmission for forming an opening between the two and connecting the two. Using a joining tool having a case, a chuck portion is inserted between a pair of flanges, a grip portion is arranged on the outer surface side of the flange while avoiding one flange, and a pressing force is applied from the outer surface side of the flange. By applying, a tapping screw is screwed from the inner surface side to the outer surface side of the other flange, and the flange and the steel building material abutting on the flange are joined.

The above tapping screw is screwed substantially perpendicularly to the flange surface.

[0010] In addition, the joint structure of steel building materials according to the present invention is a steel building material having a substantially U-shaped or substantially C-shaped cross-section formed of a web and a pair of flanges, which is joined with a tapping screw. A joining structure, in which a grip portion to which a pressing force for pressing the tapping screw is applied, a chuck portion to which the tapping screw is attached, and a U-shaped or L-shape for forming an opening therebetween and connecting the both. Using a joining tool having a U-shaped transmission case, a chuck portion is inserted between a pair of flanges, a grip portion is arranged on the outer surface side of the flange while avoiding one flange, and the outer surface side of the flange is arranged. The tapping screw is screwed in from the inner side to the outer side of the other flange by applying a pressing force from the other side, and the flange is joined to a steel building material abutting on the flange.

The above tapping screw was screwed almost perpendicularly to the flange surface.

[0012]

FIG. 1 is an explanatory view showing an example of a method for joining steel building materials according to the present invention. In the drawing, reference numeral 1 denotes a web 21 formed by bending a steel sheet into a substantially U-shape and comprising two steel building materials 2 (hereinafter referred to as channel steel) each comprising a web 21 and a pair of flanges 22a and 22b. This is a beam member in which the members are brought into contact with each other and joined with the tapping screw 60 to be integrated. 3 is a pair of flanges 42 having a web 41 and a lip formed by bending a steel plate into a substantially C shape.
a, 42b, a base material composed of a steel building material 4 (hereinafter referred to as a lip channel steel), which is disposed on the beam member 1 at right angles to the beam member 1 and whose lower flange 42b is The upper flanges 22a, 22a are joined with the joining tool 5 by tapping screws 60.

As shown in FIG. 2, an example of the joining tool 5 is a grip portion 51, a transmission case 52 provided below the grip portion 51 and having a substantially U-shaped opening 53, and a chuck for mounting a tapping screw 60. The handle 51 is provided with a push button switch 55 for opening and closing a power supply circuit of a motor described later. Reference numeral 56 denotes a motor housed in the transmission case 52. The motor 56 may be driven by a battery (not shown) provided in the transmission case 52, or may be driven by a commercial power supply or the like. The output of the motor 56 is transmitted to the chuck 54 by power transmission means 57 composed of, for example, a sprocket and a chain. The power transmission means 37 may use other means such as a bevel gear and a rotating shaft, a pulley and a timing belt, for example.

In order to join the base material 3 to the beam member 1 by the joining tool 5 as described above, as shown in FIG. Thus, the opening 53 of the transmission case 52 is inserted into the overhang portion (upper franc 42 a) of the base material 3. Then, the tip of the tapping screw 60 is
To the predetermined position of the lower flange 42b of the
When the motor 56 is driven by turning on the push button switch 55 with the finger of the hand holding the motor 1, the rotation of the motor 56 is transmitted to the chuck 54 via the power transmission means 57 and the tapping screw 60 is automatically 3 and the upper flanges 22a, 22a of the beam member 1 are screwed together.

FIGS. 3 to 7 show an example of a joint structure for steel building materials according to the present invention. In the example of FIG. 3, the lip channel 4a constituting the base material 3 is placed on the lip channel 4 constituting the beam member 1 at right angles thereto, and the lower flange 42b thereof is attached to the beam member 1. The opening 53 of the joining tool 5 is inserted into the upper flange 42a of the base material 3, and the two are joined by the tapping screw 60 in the manner shown in FIG.

FIG. 4 shows an example in which a lip channel 4
And the flanges 22a, 42a, 22b, 4
2b are respectively joined by tapping screws 6 to form a box-shaped beam member 1, on which a base material 3
The lower flange 42b of the lip channel steel 4a constituting the base member 3 is placed in contact with the lower member 42, and the lower flange 42b of the base material 3 and the beam member 1
The upper flange 22a of the channel steel 2 and the upper flange 42a of the lip channel steel 4 are integrally joined by a joining tool 5 by tapping screws 6 in the manner shown in FIG.

In the example shown in FIG. 5, the webs 21 and 21 of the two channel steels 2 and 2 are abutted on the lip channel 4 constituting the beam member 1 at right angles to the lip channel 4 and the tapping screws 60 are provided. The base material 3 joined by the method described above is placed, and its lower flanges 22b, 22b and the upper flange 42a of the beam member 1 are integrally joined by a joining tool 5 by tapping screws 60 in the manner shown in FIG.

FIG. 6 shows an example in which a lip channel 4
And the flanges 22a, 42a, 22b, 4
2b are joined by tapping screws 60 to form a box-shaped column 7 and a beam member 1 is similarly formed, and the beam member 1 is attached to the upper end of one flange 22b of the channel steel 2 of the column 7. Abut the web 21 of the channel steel 2.

Then, the opening 53 of the joining tool 5 is inserted into the other flanges 22a and 42a of the column 7, and the chuck 54 is inserted.
The tapping screw 60 attached to the column 7 is positioned at a predetermined position inside the flange 42b of the lip channel steel 4 constituting the column 7, and the motor 56 is driven to set the tapping screw 60 to the flanges 42b, 22b of the column 7 and the beam member 1. Are screwed into the web 21 and joined together.

In the example shown in FIG. 7, the lower ends of the studs 7a made of the lip channel steel 4 are provided at predetermined intervals in the opening of the lower frame 8 made of the channel steel 2 and arranged with the opening facing upward. The lower frame 8 is provided with the face material 9 attached to the outdoor side.
Of the flanges 22a and 22b of the stud 7a and the flanges 42a and 42 of the
0 is integrally joined. In addition, 60a in FIG. 7 shows the case where the tapping screw is screwed into the flange 42a of the stud 7a from the indoor side of the flange 22a of the lower frame 8, and 60b shows the flange 42a of the stud 7a.
5 shows a case where a tapping screw is screwed into the flange 22a of the lower frame 2 from the outdoor side of FIG.

Thus, in the present invention, for example,
When joining the beam member 1 and the base material 3, not only is an L-shaped bracket unnecessary, but also a driver insertion hole (FIG. 1) in the upper flange 42 a (overhang portion) of the base material 3.
1) 61), the opening 5 of the joining tool 5 is not required.
By inserting the tapping screw 60 into the overhang portion 42a of the base material 3, the tapping screw 60 can be directly and very easily screwed into a predetermined position. For this reason, the degree of freedom in design and working posture is increased, and the tapping screw 60 is not screwed in the upward posture.

FIG. 8 is a schematic view of another example of the welding tool 5 used in the present invention. The joining tool 5 of the present embodiment includes a substantially L-shaped transmission case 52, a grip portion 51 provided substantially parallel to a horizontal portion of the transmission case 52, and a chuck 54. An opening 53 is formed between the handle and the grip 51. Reference numeral 55 denotes a push button switch provided on the grip 51. 56 is the transmission case 5
The output of the motor is stored in a chuck 54 via a power transmission means 57 composed of, for example, a rotating shaft and gears.
Is transmitted to

In the joining tool 5 as described above, the tapping screw 60 is attached to the chuck 54, the grip portion 51 is held, and the opening 53 is formed in the overhang portion 4 of the base material 3.
2a. Then, the tip of the tapping screw 60 is aligned with a predetermined position of the lower flange 42b of the base material 3,
The push button switch 55 is turned on to transmit the rotation of the motor 56 to the chuck 54. As a result, the tapping screw 60 is screwed from the lower flange 42b of the base member 3 to the upper flange 22a of the beam member 1, and the two are joined.

In the above description, the case where the beam member of the steel house and the base material are mainly joined with the tapping screw using the joining tool has been described. However, the present invention is not limited to this, and the web and the pair of webs are joined. The present invention can be applied to the joining of steel building materials having a substantially U-shaped or substantially C-shaped cross section composed of a flange.

Although the case where the motor of the welding tool is accommodated in the transmission case has been described, the motor may be provided outside the transmission case.
Further, a pneumatic motor may be used instead of the electric motor. Furthermore, although the case where the push button switch is provided on the lower surface of the grip portion is shown, it may be provided in another place.

[0026]

According to the method for joining steel building materials according to the present invention, a tapping screw is used to join steel building materials having a substantially U-shaped or substantially C-shaped cross section composed of a web and a pair of flanges. A grip portion to which a pressing force for pressing the gripping portion is applied, a chuck portion to which a tapping screw is attached, and a U-shaped or L-shaped transmission case that forms an opening between the two and connects the two. Using a joining tool to insert, insert the chuck between a pair of flanges,
By arranging a grip portion on the outer surface side of the flange avoiding one flange and applying a pressing force from the outer surface side of the flange, a tapping screw is screwed in from the inner surface side of the other flange toward the outer surface side. Then, the flange and the steel building material abutting on the flange are joined, and the tapping screw is screwed almost perpendicularly to the flange surface, so that the following effects can be obtained. it can.

That is, according to the present invention, an L-shaped bracket is required for joining steel building materials having a substantially U-shaped or substantially C-shaped cross section composed of a web and a pair of flanges. Also, there is no need to provide a screwdriver insertion hole in the overhang part of the steel building material, and the tapping screw can be directly and easily screwed into a predetermined position, improving workability and shortening the construction period. Cost can be reduced. In addition, the degree of freedom in design can be increased.

Further, the joint structure of steel building materials according to the present invention is a steel building material having a substantially U-shaped or substantially C-shaped cross section composed of a web and a pair of flanges, which is joined with a tapping screw. A joining structure, in which a grip portion to which a pressing force for pressing the tapping screw is applied, a chuck portion to which the tapping screw is attached, and a U-shaped or L-shape for forming an opening therebetween and connecting the both. Using a joining tool having a U-shaped transmission case, a chuck portion is inserted between a pair of flanges, a grip portion is arranged on the outer surface side of the flange while avoiding one flange, and the outer surface side of the flange is arranged. A tapping screw is screwed in from the inner surface side to the outer surface side of the other flange, and the flange is joined to a steel building material abutting on the flange. Since screwed substantially perpendicular to the screw against the flange surface, it is possible to obtain the same effect as above.

[Brief description of the drawings]

FIG. 1 is an explanatory view of an example of a method for joining steel building materials according to the present invention.

FIG. 2 is a schematic view of the joining tool of FIG. 1;

FIG. 3 is an explanatory view of an example of a joint structure of a steel building material according to the present invention.

FIG. 4 is an explanatory view of an example of a joint structure of a steel building material according to the present invention.

FIG. 5 is an explanatory diagram of an example of a joint structure of a steel building material according to the present invention.

FIG. 6 is an explanatory view of an example of a joint structure of a steel building material according to the present invention.

FIG. 7 is an explanatory view of an example of a joint structure of a steel building material according to the present invention.

FIG. 8 is a schematic view of another example of a joining tool.

FIG. 9 is an explanatory view of an example in which a conventional base material is joined to a beam member.

FIG. 10 is an explanatory view of an example in which a conventional base material is joined to a beam member.

FIG. 11 is an explanatory diagram of an example of joining a conventional base material to a beam member.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Beam member 2 Steel building material (channel steel) 3 Base material 4 Steel building material (lip channel steel) 5 Joining tool 51 Handle 52 Transmission case 53 Opening 54 Chuck 56 Motor 57 Power transmission means 60 Tapping screw

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code FI E04B 1/58 506 E04B 1/58 506F

Claims (4)

[Claims] 1. A method for joining steel building materials having a substantially U-shaped or substantially C-shaped cross section, comprising a web and a pair of flanges, to each other with a tapping screw, the pressing force for pressing the tapping screw. And a chuck portion to which a tapping screw is attached,
A chucking portion is inserted between a pair of flanges using a joining tool having a U-shaped or L-shaped transmission case for forming an opening between the two and connecting the two. A grip is arranged on the outer surface side of the flange to avoid
By applying a pressing force from the outer surface side of the flange, a tapping screw is screwed in from the inner surface side to the outer surface side of the other flange to join the flange and the steel building material abutting on the flange. Characteristic method of joining steel building materials. 2. The method according to claim 1, wherein the tapping screw is screwed substantially perpendicularly to the flange surface. 3. A joining structure of a steel building material comprising a web and a pair of flanges and having a substantially U-shaped or substantially C-shaped cross section joined by a tapping screw, the pressing force for pressing the tapping screw. And a chuck portion to which a tapping screw is attached,
A chucking portion is inserted between a pair of flanges using a joining tool having a U-shaped or L-shaped transmission case for forming an opening between the two and connecting the two. A grip is arranged on the outer surface side of the flange to avoid
By applying a pressing force from the outer surface side of the flange, a tapping screw was screwed in from the inner surface side to the outer surface side of the other flange, and that the flange and the steel building material abutting on the flange were joined. Characteristic joint structure of steel building materials. 4. The joint structure for steel building materials according to claim 3, wherein the tapping screw is screwed substantially perpendicularly to the flange surface.