JPH0510000A - Structure of the panel to which hot-dip zinc plating is applied - Google Patents

Abstract

PURPOSE:To prevent thermal deformation by specifying thickness of a reinforcing material as well as arranging and fastening the reinforcing material on one side of a rectangular steel plate in the linearly contact state in one direction. CONSTITUTION:A plate 9 made of a steel sheet the side edge of which is bent and reinforcing materials 10, 11 having thickness of 70-140% of the plate 9 are provided. A panel for floor board and roof board is formed by welding and fixing the reinforcing materials 10, 11 linearly, scatteringly and others on the plate 9. Then, this panel is cooled with hot water for cooling after plated with molten zinc. In the case of using it for the roof board, when required, it is possible to bend the plate 9 in sectionally arc or in a gable shape. Furthermore, the reinforcing materials 10, 11 can be made in a tube, a square cylinder, a V, an H or an upside-down T shape. It is also possible to fix them with a rivet, a bolt and others. Consequently, it is possible to prevent camber and wrinkle, and because of simple structure, it is possible to manufacture them easily.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a panel in which a reinforcing member is fixed to a rectangular steel plate which can be subjected to hot dip galvanizing without causing deformation such as wrinkles and warpage. The panel has a sufficient strength by itself and is useful as a floorboard or a roofboard of a building.

[0002]

2. Description of the Related Art When manufacturing a steel panel of a type in which a reinforcing member is fixed to a rectangular steel plate, the steel plate is divided into fine rectangles by fixing the reinforcing member and the steel plate combined in a cross beam shape. Conventionally, the structure that restrains the entire circumference has been taken in common sense.

[0003]

However, when a panel having such a structure is rapidly dipped in molten zinc at a temperature of 440 to 450 ° C. from room temperature, it is dipped in hot water and subjected to hot dip galvanizing accompanied by rapid heating and quenching. Deformation such as wrinkles and warpage occurs, and not only a great deal of labor is required for correction, but also when the deformation is large, it may be unavoidable to discard it. Further, if the panel is preheated or gradually cooled in order to avoid rapid heating and rapid cooling, there are problems in that the number of steps is increased and the processing time is increased, which makes industrial use difficult. There is also a method of separately plating a reinforcing member and a steel plate and fastening them later, but this is not preferable because the number of steps increases.

It is an object of the present invention to obtain a structure of a hot-dip galvanized panel which does not cause deformation such as wrinkles and warpage without the above-mentioned special process.
An example of hot dip galvanizing the panel having the above structure will be shown below. The hot dip galvanizing conditions in the present specification are as follows: hot dip galvanizing temperature is 442 to 450 ° C. Temperature of hot water for cooling 50
It is performed in the range of -80 ° C.

FIG. 1 shows a panel of the structure normally considered. The flat plate 1 shown by cutting out a part has an outer dimension of 1219 mm × 3620 mm in which the edges of one long side and two short sides are bent,
It is a striped steel plate with a thickness of 3.2 mm, and the reinforcing material 2 arranged in the longitudinal direction of both ends of the flat plate 1 and the reinforcing material 3 connecting them are groove-shaped ropes (JISG3192) and the size is 125 mm × 65.
It is mm × 6 mm, and is intermittently welded to the flat plate 1 at a pitch of 100 mm. Reinforcing material 4 is equilateral Yamagata rope (JISG3
192), the size is 50 mm × 50 mm × 4 mm, and the flat plate 1 is also intermittently welded at a pitch of 100 mm. As a result of applying hot dip galvanizing to the panel to which rapid heating and rapid cooling are applied, wavy wrinkles are generated in the flat plate 1 and the reinforcing material 2 is warped in a convex shape on the opposite side of the flat plate 1.
When the flat plate 1 was placed on top and measured on a surface plate, a maximum lift of 30 mm occurred with respect to the grounding point, and it was unavoidable to discard it.

FIG. 2 shows a panel of a structure which is also usually considered. The flat plate 5 shown with a part cut away has an outer dimension of 720 mm × 5400 mm with the edges of both long sides bent, and a thickness of 3.2 mm.
Which is a striped steel plate, and the reinforcing material 6 arranged in the longitudinal direction of both ends of the flat plate 5 and the reinforcing material 7 arranged in the short side direction of both ends of the flat plate 5 are groove type steels 1.
It is 25 mm × 65 mm × 6 mm (JISG3192) and is intermittently welded to the flat plate 5 at a pitch of 300 mm. The reinforcing member 8 connecting the reinforcing members 6 is an equilateral Yamagata rope (JIS
G3192), the size is 50 mm × 50 mm × 4 mm, and the plate 5 is intermittently welded at a pitch of 100 mm. When hot dip galvanizing was applied to such a panel, wavy wrinkles were generated on the flat plate 5, and the reinforcing material 6 had a convex warpage on the opposite side of the flat plate 5. When measured on the surface plate, the ground point As a result, a maximum of 70 mm was lifted, and it had to be discarded.

[0007]

In order to achieve the above object, in the panel of the present invention, 1 is formed on one side of a rectangular steel flat plate.
A plurality of reinforcing members are arranged separately only in parallel or in parallel, and the steel flat plate and the reinforcing member are abutted so as to be in line contact, and then fixed in a linear or dot shape, and made of the steel. By making the thickness of the reinforcing member 70 to 140% of the thickness of the flat plate, deformation such as wrinkles and warpage due to hot dip galvanization is prevented.

[0008]

In the panel according to the present invention, since the reinforcing member is arranged in parallel with the flat plate, the flat plate is not divided into a cross beam shape, and has a peculiar structure in which it is restrained by only two sides. The difference in wall thickness of the reinforcing material is small, and the flat plate and the reinforcing material are in linear contact with each other, and the deviation of the heat capacity is small. When such a panel is subjected to hot dip galvanization, the reinforcing material and the steel flat plate have a small thickness difference, and since the abutting portion is a line contact, the difference in heat capacity between the respective parts of the panel is small, so that a difference in thermal expansion rate occurs. Hateful. Furthermore, the direction perpendicular to the reinforcing member is connected only by the steel flat plate and has low rigidity. Therefore, the restraining force of deformation due to thermal expansion is weak, and large stress does not occur in the steel material. Wrinkles and warpage do not occur for the above reasons.

[0009]

EXAMPLE FIG. 3 shows an example of a panel having a structure according to the present invention. The flat plate 9 shown with a part cut away has an outer dimension of 1200 mm × 3620 mm in which the edges of one long side and two short sides are bent.
It is a striped steel plate having a thickness of 3.2 mm. The two reinforcing members 10 arranged in parallel to the longitudinal direction of the flat plate 9 are obtained by bending a steel plate having a thickness of 4.5 mm, which is approximately 140% of the thickness of the steel plate, and having a height of 15 mm.
The width is 0 mm and the width is 75 mm, and the two reinforcing members 11 have a thickness of 3.
Bending a 2 mm rope plate, height 150 mm, width 100 m
m, and each reinforcing material is intermittently welded to the flat plate 9 at a pitch of 300 mm. The ribs 12 attached to each reinforcing member at four positions at equal intervals are steel plates having a thickness of 3.2 mm. As a result of performing hot dip galvanizing on such a panel, it was possible to maintain the shape before hot dip galvanizing without generating wrinkles or warpage.

FIG. 4 also shows an example of the panel according to the present invention. The flat plate 13 shown with a part cut away has an outer dimension of 1170 mm
The striped steel plate has a thickness of 2423 mm and a thickness of 3.2 mm, and the edges of one short side and two long sides are bent. The reinforcing members 14 arranged in the direction of the short side are formed by bending a steel plate having a thickness of 3.2 mm, have a height of 150 mm and a width of 50 mm, and are intermittently welded to the flat plate 13 at a pitch of 68 mm.
Also, three ribs 1 are attached at equal intervals per reinforcing material.
5 is a steel plate having a thickness of 3.2 mm. As a result of hot-dip galvanizing such a panel, it was possible to maintain the shape before plating without causing wrinkles or warpage.

FIG. 5 also shows an example of the panel according to the present invention. The flat plate 16 has an outer dimension of 720 mm × 2965 mm and a thickness of 3.
It is a striped steel plate of 2 mm, and both ends in the long side direction are bent. The two reinforcing members 17 arranged parallel to the longitudinal direction are bent steel plates having a thickness of 3.2 mm, and have a height of 150 m.
It has a width of 50 mm and is intermittently welded to the flat plate 16 at a pitch of 250 mm. Ribs 18 and 19 are steel strips with a thickness of 3 mm
Is. The member 20 for connecting the reinforcing member 17 is provided separately from the flat plate 16 and has a width of 50 mm and a thickness of 3 mm. As a result of subjecting the panel to hot dip galvanization, it was possible to maintain the shape before plating without generating wrinkles or warpage.

FIG. 6 also shows an example of the panel according to the present invention. The flat plate 21 shown with a part cut away has an outer dimension of 1219 mm ×
It is a striped steel plate having a thickness of 3620 mm and a thickness of 3.2 mm, and both short sides are bent. The reinforcing member 22 is formed by bending a steel plate having a thickness of 4.5 mm, and has a height of 150 mm, a width of 75 mm, and four ribs 24 having a thickness of 3.2 mm per one at equal intervals, and is intermittently welded to the flat plate 21 at a pitch of 250 mm. ing. Reinforcement material 2
3 is a U-shaped bent steel plate having a thickness of 3.2 mm, and has a height of 150 mm and a width of 200 mm.
It is intermittently welded at a pitch of 00 mm. The flat plate 21 is provided with a 240 mm × 1005 mm rectangular opening. As a result of performing hot dip galvanizing on such a panel, it was possible to maintain the shape before plating without generating wrinkles or warpage.

FIG. 7 also shows an example of the panel according to the present invention. The flat plate 25 is a striped steel plate having an outer dimension of 1180 mm × 3640 mm and a thickness of 3.2 mm, and the edges of both long sides are bent, and the central portion is approximately 10 mm higher than the end portions in the short side direction. Bent smoothly. The reinforcing member 26 is a bent steel plate having a thickness of 3.2 mm and has a height of 150 mm and a width of 75 mm. The reinforcing member 27 is a bent steel plate having a thickness of 3.2 mm and has a height of 15 mm.
6mm width 75mm, each reinforcement is 68m pitch
It is intermittently welded to the flat plate 25 at m. The members 28 and 30 are separated from the flat plate 25 and welded to the reinforcing members 26 and 27 to connect the four reinforcing members for convenience. Member 28 has a thickness of 4.5
A steel plate having a size of 25 mm is bent to a height of 25 mm and a width of 55 mm. Member 30 is lip groove type steel 60mm × 30mm × 1
The thickness is 0 mm and 2.3 mm (JISG3350). The draining shaped steel 29 is a strip steel having a thickness of 3 mm and a width of 65 mm, the end thereof is bent into a V shape, the side contacting with the flat plate 25 is processed to have a middle height, and intermittently welded to the flat plate 25 at a pitch of 100 mm. ing. As a result of performing hot dip galvanization on such a panel, it was possible to maintain the shape before plating without generating wrinkles or warpage.

The panel shown in FIG. 7 is manufactured in consideration of being used for a roof, and in order to make rainwater easily flow down, it is necessary to have a flat panel having a middle height in the short side direction.
It is not necessary to provide a means for providing a gradient for facilitating the flow of water. The bent edge 31 of the flat plate 25 and the member 29 have a function as a drainer. It is possible to make a roof with a large area by arranging such panels in a grid pattern and arranging a rain toy under the edge 31 and the lower portion of the member 29.

Although the flat plate of this panel is smoothly bent, it may be bent like a gable roof.

The flat plate 25 of the panel shown in FIG. 7 was also manufactured as a flat plate which was not bent and was subjected to hot dip galvanizing. However, the shape before plating could be maintained without wrinkles or warpage. It was

The panel shown in FIG. 8 also has the same material and structure as the panel shown in FIG. 7, but differs from the example of FIG. 7 in that the member 35 connects only three reinforcing members. It was possible to perform hot dip galvanizing on such a panel while maintaining the shape before plating without causing wrinkles or warpage.

In the panel according to the present invention, the reinforcing material and the flat plate may be fixed to each other by lines or points.
It is also possible to dispose a reinforcing member having each of the cross-sectional shapes of 39 to 43 illustrated in FIG.

In this embodiment, only welding is illustrated as the fixing means, but means such as riveting, bolting and fitting may be used.

Further, the member for connecting the reinforcing member separately from the flat plate may be other than that shown in the embodiment as long as it does not have an excessive resistance to the thermal expansion or the thermal contraction of the flat plate which occurs during hot dip galvanizing. Therefore, it is also possible to dispose the thin plates 46 between the reinforcing members 47 as shown in FIG. 10 without fixing the tangent line 45 between the flat plate 44 and the thin plates 46 as shown in FIG. A member for connecting the reinforcing material is provided for the purpose of ensuring rigidity of the entire panel, preventing deformation during panel can making and galvanizing, and fastening means during assembly.

The thickness of the reinforcing material and the shape steel attached to the outer edge of the flat plate is 100 to 140% with respect to the thickness of the flat plate in the examples. This is because the panel is deformed during hot dip galvanizing. This is because the reinforcing material or the shaped steel to be attached to the outer edge is made as strong as possible within the range where it does not exist, and if the strength does not matter, the flat plate may be thinned in the opposite ratio to the above.

Further, the panel shown in the present embodiment is particularly intended for use as a roof or a floor, and therefore the reinforcing material is fixed to only one side of the flat plate, however, hot dip galvanizing Since only the deformation at the time is a problem, it may be fixed on both sides of the flat plate if there is any.

Further, in the panel shown in FIGS. 3, 4, and 6 in which the reinforcing members are not connected to each other, it is possible to bend the panel when it is assembled as a floor or roof after plating, and for example, water It is also easy to assemble the panel flat plate so that it does not stay.

[0024] Further, in the panel in which the reinforcing material is assembled in a cross beam shape,
The part surrounded by the flat plate and the reinforcing material becomes a box shape, which causes buoyancy when immersed in molten zinc, making it impossible to quickly immerse the entire panel, resulting in a large temperature difference at each point of the panel and excessive thermal strain. Therefore, it is easy to deform. In that respect, since the panel shown in this embodiment does not generate such buoyancy, it can be dipped quickly and thermal distortion is less likely to occur.

[0025]

The panel having the structure according to the present invention has the following effects. 1. It is possible to perform hot-dip galvanizing without causing deformation such as warpage or wrinkles without using a special method such as preheating or slow cooling. 2. The structure according to the present invention is simpler and easier to manufacture than the structure in which the reinforcing materials are combined in a cross beam shape. 3. When the plate of the panel is provided with a slope, it is only necessary to attach the reinforcing material in one direction, so that it can be easily dealt with. 4. In the case of a panel having a structure in which the reinforcing materials are not connected to each other, it can be assembled in a bent state after plating.

[Brief description of drawings]

[Figure 1] and

[Fig. 2] Panel of a structure that is usually considered

[Figure 3]

[Figure 4] and

[Figure 5] and

[Fig. 6]

FIG. 7 and

FIG. 8: Panel having a structure according to the present invention

[Fig. 9] Example of cross section of reinforcing material

FIG. 10 is an example of a member connecting the reinforcing members viewed from a direction parallel to the reinforcing members.

[Explanation of symbols]

32 ... steel plate 33 ... Reinforcing material 34 ... Reinforcing material 36 ... Shaped steel for draining 37 ... Member for connecting reinforcing members

Claims (6)

[Claims] 1. A structure of a panel which comprises a steel plate and one or a plurality of reinforcing members which are in contact with one surface of the steel plate and fixed to each other, and which is then subjected to hot dip galvanizing. 2. A part or all of the outer edge of the steel plate according to claim 1, wherein the steel plate is bent or shaped steel having a thickness of 70 to 140% of the thickness of the steel plate is fixed. The structure of a panel to be hot-dip galvanized according to claim 1. 3. The steel plate and the reinforcing member according to claim 1,
The structure of a panel to be galvanized according to claim 1, wherein the reinforcing member is horizontally placed below the steel plate, and the steel plate is convex upward or has an inclination. . 4. The steel plate and the reinforcing member according to claim 1,
The structure of a panel to be galvanized according to claim 1, wherein the reinforcing member is fixed to the steel plate by lines or points. 5. A reinforcing member for a steel plate according to claim 1,
The structure of a panel to be galvanized according to claim 1, wherein the reinforcing member has a plate thickness of 70 to 140% of the steel plate. 6. The steel plate and the reinforcing member according to claim 1,
The structure of a panel to be galvanized according to claim 1, wherein the reinforcing members are connected to each other by a member provided separately from the steel plate.