JP7187259B2 - Construction method and construction kit for joining tight frames - Google Patents

Description

TECHNICAL FIELD The present invention relates to a construction method for joining a tight frame for attaching a folded plate roof to a roof beam.

Conventionally, in the case of thatching a folded-plate roof, the construction method is to fillet-weld a tight frame for attaching the folded-plate roof to the structural material (roof beams) of the building, and then place the folded-plate roof on the tight frame. It is done. Moreover, Patent Document 1 discloses a construction method using a grooved rivet that penetrates the bottom of the tight frame and is driven into the structural material instead of the fillet welding of the tight frame.

JP-A-8-284328

However, the construction method by welding cannot be constructed in places where fire cannot be used, and there is a problem that the welded tight frame or structural material tends to rust. Moreover, even if the grooved rivet of Patent Document 1 is used, there is a problem that the tight frame or the structural material tends to rust due to the potential difference generated by the contact of dissimilar metals. Therefore, a construction method that is safer and less likely to cause corrosion due to rust than the construction method described above is desired.

In order to solve the above problems, a construction method and a construction kit necessary for the construction are provided to prevent the area where the tight frame is joined from being corroded by rust or the like.

A method for constructing a tight frame according to a first aspect includes a curing step of curing the periphery of a joint region of a structural member that is in contact with the bottom portion of the tight frame; An attachment step and an installation step of installing the rear surface of the bottom portion of the tight frame on the first fiber reinforced resin sheet. Furthermore, the construction method includes a second attaching step of attaching an uncured second fiber reinforced resin sheet to the front surface of the bottom side of the tight frame and the first fiber reinforced resin sheet so as to straddle the tight frame; and an ultraviolet irradiation step of curing the reinforced resin sheet and the second fiber reinforced resin sheet with ultraviolet rays.

The joint region of the structural material may include the front surface and the rear surface of the structural material, and in the first attaching step and the second attaching step, the first fiber reinforced resin sheet and the second fiber reinforced resin sheet are bonded to the structural material. It may be attached to the front and back of the material.
In the ultraviolet irradiation step, a reflector may be used to irradiate the rear surface of the structural material with ultraviolet rays.
Further, after the curing step, a pretreatment step is provided for roughening the joint region or applying an undercoat layer of paint containing a rust-converting agent, and the first attaching step is performed on the joint region roughened or coated with the undercoat layer. 1 fiber reinforced resin sheet may be attached.

According to the construction method and construction kit of the present invention, the tight frame or structural material is less likely to be corroded by rust or the like.

1 is a perspective view showing a state where a folded plate is attached to a roof beam in the first embodiment; FIG. FIG. 4A is a top view, a front view, and a side view showing a state in which the tight frame is fixed to the roof beam. 4 is a flow chart of a construction procedure for fixing the tight frame to the roof beam. FIG. 10 is a front view and a side view showing a state in which the tight frame is fixed to the roof beam in the second embodiment;

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. It should be noted that the scope of the present invention is not limited to these forms unless there is a description to the effect that the present invention is particularly limited in the following description.

(First embodiment)
<Overview of folded plate roof>
FIG. 1 is a perspective view showing how a folded plate is attached to a roof beam, and is a perspective view of a partially cutaway folded plate. The folded-plate roof of the first embodiment is widely used in houses, factories, garages, station platforms, etc., and is particularly suitable for installing or repairing a folded-plate roof without using fire. . A folded plate roof generally includes a horizontally extending roof beam 4, a folded plate 5 fixed to the roof beam 4, and a tight frame 6. - 特許庁Folded-plate roofs include a seam type, an overlapping type, and an interlocking type. FIG. 1 shows an overlapping-type folded-plate roof. In this embodiment, the overlapping type will be described without explaining the seam tightening type and the fitting type, but it is also possible to apply this embodiment to the seam tightening type and the fitting type.

The roof beam 4 is, for example, a roof beam extending in the ridge direction (X-axis direction) on the eaves side. In this embodiment, the roof beam 4 is described as H-shaped steel, but it may be L-shaped steel (angle steel), I-shaped steel, channel steel, or the like. The roof beam 4 described in this embodiment is made of H-shaped steel and has a web and a flange 4f.

The folded plate 5 is formed from a steel plate shaped into a trapezoidal wave shape. Specifically, the folded plate 5 is formed by sequentially connecting a bottom surface portion 5a, a slope portion 5b, and a top surface portion 5c, and has a substantially trapezoidal cross section. This folded plate 5 is fixed to the roof beam 4 via a tight frame 6 .

The tight frame 6 is formed from a galvanized steel plate shaped into a trapezoidal corrugated shape. The tight frame 6 has a bottom portion 6a extending in the ridge direction (X-axis direction) in front of the flange 4f of the roof beam 4, and an oblique portion 6b and a top portion 6c integrally formed with the bottom portion 6a. The bottom portion 6a of the present embodiment is fixed to the front surface of the flange 4f of the roof beam 4 by the first fiber reinforced resin sheets 12 and 14 as will be described later, and is not fixed by bolts or welding. The oblique side portion 6b and the top side portion 6c are bent in a trapezoidal shape along the slope portion 5b and the top surface portion 5c on the back surface of the folded plate 5 . Specifically, the oblique side portion 6b is in contact with the rear surface of the slope portion 5b, and the top side portion 6c is in contact with the rear surface of the top surface portion 5c. A tip bolt 8 protrudes in front of the top side 6c, and the tip bolt 8 is used to fix the top face 5c of the folded plate 5 to the top side 6c of the tight frame 6. As shown in FIG.

Although the tight frame 6 has a plurality of different sizes depending on the size of the folded plate 5, any size can be applied to fixing using the fiber reinforced resin sheet of the present embodiment. In addition, generally commercially available tight frames include a type that is fixed to the roof beam 4 with bolts and a type that is fixed to the roof beam 4 by welding. The bolt-fixed type has holes for bolts formed in the bottom portion 6a of the tight frame 6, and the weld-fixed type does not have holes formed in the bottom portion 6a of the tight frame 6. FIG. This embodiment can be applied to a tight frame in which holes for bolts are formed in the bottom portion 6a and a tight frame in which holes are not formed.

<Structure with fixed tight frame>
FIG. 2 shows a state in which the tight frame 6 is fixed to the roof beam 4, where (a) is a top view, (b) is a side view, and (c) is a right front view. . Note that the tip bolt 8 arranged on the top surface portion 5c is not drawn in FIG. In FIG. 2, the width (Y-axis direction) of the tight frame 6 is indicated by W1, and the width of the flange 4f of the roof beam 4 is indicated by W2. The length (X-axis direction) of the bottom portion 6a of the tight frame 6 is indicated by L1. For example, the width W1 of the tight frame 6 is 30 mm, the length L1 of the bottom portion 6a is 40 mm, and the pitch PH of the bottom portion 6a is 200 mm. A width W2 of the flange 4f is, for example, 100 mm.

As shown in FIG. 2, the first fiber reinforced resin sheet 12 is attached to the front surface of the flange 4f of the roof beam 4 with a constant pitch width PH in the X-axis direction. One size of the first fiber reinforced resin sheet 12 is a length L2 of 1.5 to 3 times the length L1 of the base portion 6a in the X-axis direction, and a width W2 of the flange 4f in the Y-axis direction. The width W2 is approximately the same. This first fiber reinforced resin sheet 12 is attached. That is, the length L2 of the first fiber-reinforced resin sheet 12 is, for example, 80 mm, and the width W2 is, for example, 100 mm.

The bottom portion 6a of the tight frame 6 is arranged in the center (in the X-axis direction and the Y-axis direction) of the first fiber-reinforced resin sheet 12 attached with the pitch width PH. A second fiber reinforced resin sheet 14 is attached on the bottom portion 6 a of the tight frame 6 and on the first fiber reinforced resin sheet 12 . 2(a) and 2(b), since the tight frame 6 is arranged to extend in the X-axis direction, the elongated second fiber reinforced resin sheet 14 is attached in the Y-axis direction so as to straddle the bottom part 6a. attached. The tight frame 6 and the second fiber reinforced resin sheet 14 do not have to be perpendicular to each other, and it is sufficient if they intersect each other. One size of the second fiber-reinforced resin sheet 14 is the length L1 in the X-axis direction which is the same as the length L1 of the base portion 6a, and the width W2 which substantially matches the width W2 of the flange 4f in the Y-axis direction. That is, the length L1 of the second fiber-reinforced resin sheet 14 is, for example, 40 mm, and the width W2 is, for example, 100 mm. The second fiber reinforced resin sheet 14 without the bottom portion 6 a is directly attached to the first fiber reinforced resin sheet 12 .

Since the length (in the X-axis direction) of the bottom portions 6aa at both ends of the tight frame 6 is approximately L1/2, the second fiber reinforced resin sheet 14 is partly It is attached directly to the first fiber reinforced resin sheet 12 .

<Construction method of tight frame>
A construction method for fixing the tight frame 6 to the roof beam 4 will be described below with reference to FIG. FIG. 3 is a flow chart of a construction procedure for fixing the tight frame 6 to the H-shaped steel roof beam 4 .

In step S101 of the flow chart of FIG. 3, the operator cures the front surface of the H-shaped steel flange 4f by cleaning or the like. The region to be cured is determined in consideration of the pitch PH of the base portion 6a and the length L2 and width W2 of the first fiber reinforced resin sheet 12. As shown in FIG. For example, the area to be cured is 80 mm (X-axis direction)*100 mm (Y-axis direction) at a pitch of 200 mm (X-axis direction), and the area to be cured may be wider. In addition, it is preferable to carry out a masking treatment in order to clarify the area to be cured. This curing area becomes the joint area of the tight frame.

If floating rust or rust is present in the area to be cured on the front surface of the flange 4f, the operator removes the floating rust with a brush or the like, or cleans it.

In step S102, the operator applies a rust-converting agent-containing paint to the cured area (the area where the first fiber-reinforced resin sheet 12 is to be adhered). If there is no floating rust or rust on the front face of the flange 4f, this step may be skipped, but it is preferable to apply a paint containing a rust-converting agent in order to suppress the generation of rust in the medium to long term.

In step S103, after the paint containing the rust-converting agent has dried (about 2 hours to about 4 hours), the worker attaches the first fiber-reinforced resin sheet 12 (uncured) to the cured area. An adhesive is formed on the back surface of the first fiber reinforced resin sheet 12, and a release film of the adhesive is attached to the adhesive. The fiber reinforced resin sheet 12 can be easily attached. Also, the ultraviolet protective film on the surface of the first fiber reinforced resin sheet 12 is peeled off. Before or after peeling off the ultraviolet protective film, it is preferable to press the first fiber reinforced resin sheet 12 with a roller or the like (not shown) so as to adhere the first fiber reinforced resin sheet 12 to the front surface of the flange 4f.

In step S104, the operator places the rear surface of the bottom portion 6a of the tight frame 6 in the center of the first fiber-reinforced resin sheet 12 (X-axis direction and Y-axis direction).

In step S105, the operator attaches the elongated second fiber reinforced resin sheet 14 (uncured) so as to straddle the front surface of the bottom portion 6a. An adhesive is formed on the back surface of the second fiber reinforced resin sheet 14, and a release film of the adhesive is attached to the adhesive. The second fiber reinforced resin sheet 12 can be easily pasted on the fiber reinforced resin sheet 12 . Also, the ultraviolet protective film on the surface of the second fiber reinforced resin sheet 14 is peeled off. Before or after peeling off the ultraviolet protective film, the second fiber reinforced resin sheet 14 is applied with a roller or the like (not shown) so that the second fiber reinforced resin sheet 14 is in close contact with the base portion 6a and the first fiber reinforced resin sheet 12. Pressing is preferred. In addition, the bottom part 6aa of the both ends of the tight frame 6 is the same work process.

In step S106, the operator irradiates the first fiber reinforced resin sheet 12 and the second fiber reinforced resin sheet 14 with ultraviolet rays (UV). For example, a UV-LED is installed to irradiate the first fiber reinforced resin sheet 12 and the second fiber reinforced resin sheet 14 with UV for about one hour. Then, the first fiber reinforced resin sheet 12 and the second fiber reinforced resin sheet 14 are cured, and the tight frame 6 is fixed to the flange 4 f of the roof beam 4 .

<Strength to fix the tight frame>
The following flange 4f was prepared.
Width W2: 100mm
The following tight frame 6 was prepared. Width W1: 30 mm, length L1 of bottom portion 6a: 40 mm, pitch PH of bottom portion 6a: 200 mm
A first fiber-reinforced resin sheet 12 described below was prepared.
Length L2: 80mm, Width W2: 100mm
The following second fiber reinforced resin sheet 14 was prepared.
Length L2: 80mm, Width W2: 100mm
Length L1: 40mm, Width W2: 100mm

Since the tight frame 6 has two base portions 6a and bottom portions 6aa at both ends, the tight frame 6 is fixed by attaching the first fiber reinforced resin sheet 12 and the second fiber reinforced resin sheet 14 at four locations. As a result, when the tight frame 6 was pulled from the flange 4f by 48 kgf, neither the tight frame 6 nor the second fiber reinforced resin sheet 14 was peeled off. The coating of the tight frame 6 or the flange 4f is peeled off during welding, or the coating of the hole of the flange 4f is peeled off during bolting, and the metal surface precipitates, causing corrosion such as rust on the tight frame 6 or the flange 4f over time. may progress. However, in the first embodiment, the metal surface does not appear on the tight frame 6 or the flange 4f, and the tight frame 6 and the flange 4f are covered with the first fiber reinforced resin sheet 12 and the second fiber reinforced resin sheet 14. Corrosion such as rust is less likely to occur in the tight frame 6 or the flange 4f due to the change. Moreover, since the dissimilar metals of the bolt, the tight frame 6 and the flange 4f do not come into contact with each other, rust does not occur due to the potential difference caused by the dissimilar metals.

(Second embodiment)
4A and 4B are diagrams showing a state in which the tight frame 6 is fixed to the roof beam 4, where (a) is a side view and (b) is a right front view. Note that the tip bolt 8 arranged on the top surface portion 5c is not drawn in FIG. The difference between the first embodiment and the second embodiment is that in the second embodiment, the width of the first fiber reinforced resin sheet 12p and the second fiber reinforced resin sheet 14p is longer than the width of the flange 4f, and the first Parts of the fiber reinforced resin sheet 12p and the second fiber reinforced resin sheet 14p are attached not only to the front surface (+Z axis direction) of the flange 4f but also to the rear surface (−Z axis direction).

In FIG. 4, the width (Y-axis direction) of the tight frame 6 is indicated by W1, and the width of the flange 4f of the roof beam 4 is indicated by W2. The length (X-axis direction) of the bottom portion 6a of the tight frame 6 is indicated by L1. For example, the width W1 of the tight frame 6 is 30 mm, the length L1 of the bottom portion 6a is 40 mm, and the pitch PH of the bottom portion 6a is 200 mm. A width W2 of the flange 4f is, for example, 100 mm.

One size of the first fiber-reinforced resin sheet 12p is a length L2 of 1.5 to 3 times the length L1 of the base portion 6a in the X-axis direction and a width W2 of the flange 4f in the Y-axis direction. The width W3 is about twice as large. This first fiber reinforced resin sheet 12p is attached. That is, the length L2 of the first fiber-reinforced resin sheet 12p is, for example, 80 mm, and the width W3 is, for example, 200 mm.

One size of the second fiber reinforced resin sheet 14p is the same length L1 as the length L1 of the base portion 6a in the X-axis direction, and a width W3 (Fig. 4, it is the entire width that wraps around to the back surface). That is, the second fiber-reinforced resin sheet 14p has a length L1 of, for example, 40 mm and a width W3 of, for example, 200 mm.

Therefore, as shown in FIG. 4(b), about 50 mm of one side (−Y axis side) of the first fiber reinforced resin sheet 12p is also attached to the rear surface of the flange 4f, and the first fiber reinforced resin sheet 12p 50 mm on the other side (+Y-axis side) is also attached to the rear surface of the flange 4f. Similarly, about 50 mm of one side of the second fiber reinforced resin sheet 14p is pasted on the first fiber reinforced resin sheet 12p on the back surface of the flange 4f, and about 50 mm of the other side of the second fiber reinforced resin sheet 14p is attached to the flange 4f. is pasted on the first fiber reinforced resin sheet 12p on the rear surface of the first fiber reinforced resin sheet 12p.

The method of fixing the tight frame to the flange is basically the same as in the first embodiment. However, it is preferable that the region to be cured in step S101 is to cure not only the front surface of the flange 4f but also the rear surface thereof. Furthermore, it is preferable that the area to be coated with the paint containing the rust converting agent in step S102 be coated not only on the front surface of the flange 4f but also on the rear surface thereof. When curing the first fiber reinforced resin sheet 12p and the second fiber reinforced resin sheet 14p in step S106, it is preferable to irradiate the back surface of the flange 4f with UV. The UV-LED may illuminate the rear surface of the flange 4f from below, or the UV illuminated from above may be reflected by a reflector.

<Joining kit>
The first fiber reinforced resin sheet 12 (or 12p) and the second fiber reinforced resin sheet 14 (or 14p) are preferably sold as a joint kit for sale. The bonding kit includes a spray can containing a rust-converting agent-containing paint that converts red rust to black rust and an adhesive paint, and a plurality of first fiber-reinforced resin sheets 12 (or 12p). and a plurality of second fiber reinforced resin sheets 14 (or 14p). Although there are a plurality of types of tight frames 6, the first fiber reinforced resin sheet 12 (or 12p) and the second fiber reinforced resin sheet 14 (or 14p) are formed according to the standards such as the width of the bottom portion 6a of the tight frame 6. , are preferably prepared and sold as mating kits.

4... Roof beam 4f... Flange 5... Folded plate 5a... Bottom part 5b... Inclined part 5c... Top part 6... Tight frame 6a, 6aa... Base part 6b... Oblique side part 6c... Top part 12... First Fiber reinforced resin sheet 14 ... second fiber reinforced resin sheet

Claims (4)

A curing step of curing the joint region of the structural material in contact with the bottom part of the tight frame;
a first attaching step of attaching an uncured first fiber reinforced resin sheet to the bonding area;
an installation step of installing the back surface of the bottom portion of the tight frame on the first fiber reinforced resin sheet;
a second attaching step of attaching an uncured second fiber reinforced resin sheet to the front surface of the bottom portion of the tight frame and the first fiber reinforced resin sheet so as to straddle the tight frame;
and an ultraviolet irradiation step of curing the first fiber reinforced resin sheet and the second fiber reinforced resin sheet with ultraviolet rays. the joint region of the structural material includes the front surface and the rear surface of the structural material;
2. The method according to claim 1, wherein in said first attaching step and said second attaching step, said first fiber reinforced resin sheet and said second fiber reinforced resin sheet are attached to the front and rear surfaces of said structural member. Construction method of tight frame. 3. The tight frame construction method according to claim 2, wherein the ultraviolet irradiation step uses a reflector to irradiate the rear surface of the structural member with ultraviolet rays. After the curing step, a pretreatment step of roughening the joint area or applying an undercoat layer of a paint containing a rust converting agent,
4. The tight frame according to any one of claims 1 to 3, wherein the first attaching step attaches the first fiber reinforced resin sheet to the bonding region where the surface roughening treatment or the undercoat layer is applied. construction method.

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