JP7598251B2 - Deck plate and packaging structure - Google Patents

Description

The present invention relates to a deck plate and a packaging structure.

Deck plates used as formwork for concrete structures have been proposed (see, for example, Patent Document 1). The deck plate described in Patent Document 1 has a flat flange and multiple ribs protruding from the flange, and the strength of the deck plate is improved by the ribs formed integrally with the flange.

JP 2020-143448 A

When transporting or conveying multiple deck plates such as those described in Patent Document 1, it is preferable to package two deck plates with the ribs facing each other for space reasons. However, when multiple deck plates with different short side dimensions are packaged together, spaces are created where the relatively short deck plates are located, which can make the relatively short deck plates more likely to move and reduce the stability of the package.

One way to prevent the deck plate from moving inside the packaging is to use spacers or other materials to fill the gaps. However, since these packaging materials such as spacers are not necessary for construction, it has been desirable to reduce their use.

The present invention was made in consideration of the above-mentioned problems, and its purpose is to provide a deck plate and a packaging structure for the deck plate that can reduce packaging materials while ensuring the stability of the packaging.

To achieve the above object, the deck plate of the present invention comprises a rectangular flange portion and a plurality of ribs protruding from one side of the flange portion, extending along the long side direction of the flange portion and aligned in the short side direction, at least one of the plurality of ribs being a retaining rib capable of holding a rib of another deck plate, and a retaining protrusion is provided on the one side of the flange portion between the retaining rib and the retaining protrusion capable of holding the rib of the other deck plate.

In one aspect of the present invention, a deck plate has a recess formed on the other side of the flange at the position where the retaining protrusion is provided.

In one aspect of the deck plate of the present invention, the retaining protrusion extends along the long side of the flange portion.

In one aspect of the deck plate of the present invention, the retaining protrusion has an orthogonal surface that faces the retaining rib and extends perpendicular to the flange portion.

On the other hand, the deck plate packaging structure according to the present invention is characterized in that a pair of deck plates each having a rectangular flange portion and a plurality of ribs protruding from one side of the flange portion, extending along the long side direction of the flange portion, and aligned in the short side direction, are arranged with the one side sides facing each other to form a deck plate pair, and a plurality of the deck plate pairs are stacked in a direction perpendicular to the flange portion, and at least one of the deck plates in the deck plate pair is the above-mentioned deck plate.

The deck plate and deck plate packaging structure of the present invention can reduce packaging materials while ensuring packaging stability.

FIG. 1 is a perspective view showing a deck plate according to an embodiment of the present invention. FIG. 1 is a cross-sectional view illustrating a schematic example of a deck plate according to an embodiment of the present invention. FIG. 4 is a cross-sectional view illustrating a schematic diagram of another example of a deck plate according to an embodiment of the present invention. 1 is a cross-sectional view showing a schematic diagram of a deck plate according to an embodiment of the present invention packaged. FIG. FIG. 11 is a cross-sectional view showing a typical appearance of a deck plate of a comparative example packaged.

The following describes an embodiment of the present invention with reference to the drawings.

Figure 1 is a perspective view showing deck plates 1A and 1B according to an embodiment of the present invention, Figure 2 is a cross-sectional view showing an example of deck plate 1A according to an embodiment of the present invention, Figure 3 is a cross-sectional view showing another example of deck plate 1B according to an embodiment of the present invention, and Figure 4 is a cross-sectional view showing the state in which deck plates 1A and 1B according to an embodiment of the present invention are packaged.

As shown in Figures 1 to 3, the deck plates 1A, 1B according to the embodiment of the present invention comprise rectangular flange portions 2A, 2B, and a plurality of ribs 31, 32 that protrude from one surface 201 of the flange portions 2A, 2B, extend along the long side direction X of the flange portions 2A, 2B, and are aligned in the short side direction Y, with at least one of the plurality of ribs 31, 32 being a retaining rib 4 capable of holding a rib of another deck plate, and a retaining protrusion 5 capable of holding a rib of another deck plate is provided between the retaining rib 4 and the one surface 201 side of the flange portions 2A, 2B. Deck plates 1A, 1B will be described in detail below.

In the following, the long side direction of the rectangular plate-shaped flange portions 2A, 2B is the X direction, the short side direction is the Y direction, and the direction perpendicular to the plate is the Z direction. Deck plates 1A, 1B have different dimensions in the Y direction, that is, they have flange portions 2A, 2B with different Y direction dimensions. The following mainly describes deck plate 1A, but unless otherwise specified, deck plate 1B is assumed to have a similar configuration.

Deck plates 1A and 1B are, for example, flat decks, and are formed entirely from a single thin steel plate. The surfaces of deck plates 1A and 1B may be appropriately treated with corrosion-resistant processing such as hot-dip galvanizing. Deck plates 1A and 1B are used as formwork for reinforced concrete structures, and their shape does not change significantly between their in-use state and their packed state, but they may have portions whose shape changes.

The flange portions 2A and 2B are composed of multiple plate portions 20. The plate portions 20 are formed in a rectangular plate shape with the long side direction being in the X direction, and the multiple plate portions 20 are lined up in the Y direction. The multiple plate portions 20 are formed integrally with each other via ribs 31 and 32. The surface of the flange portions 2A and 2B on which the ribs 31 and 32 are provided (the lower surface in Figs. 1 and 2) is referred to as one surface 201, and the opposite surface (the upper surface in Figs. 1 and 2) is referred to as the other surface 202. The other surface 202 may be embossed or ridged to improve rigidity.

The flange portions 2A and 2B differ, for example, in the number of plate portions 20, and this difference results in a difference in the Y-direction dimension of the deck plates 1A and 1B. In other words, the Y-direction dimension of deck plate 1A is larger than that of deck plate 1B by the Y-direction dimension of the plate portions 20 (or an integer multiple thereof). Deck plate 1A has a bent portion 21 formed so as to be continuous with one end of the flange portion 2A in the Y direction, while deck plate 1B has no bent portion formed.

The ribs 31, 32 protrude from the first surface 201 of the flanges 2A, 2B, and are formed in a triangular cross section such that the X-direction dimension increases from the base end 311, 321 toward the tip end 312, 322 (i.e., as it moves away from the first surface 201). That is, the base end 311, 321 is located at the apex of the triangle in cross section, and the tip end 312, 322 is located at the base. The ribs 31, 32 are formed integrally with each of the plate portions 20 located on both sides in the Y direction, thereby connecting the plate portions 20 on both sides. The two ribs 31, 32 are aligned along the Y direction and have the same shape and dimensions. In the illustrated example, the deck plates 1A, 1B each have two ribs 31, 32, but may have three or more ribs.

As described above, in the flange portions 2A and 2B, the ribs 31 and 32 are provided on both sides of the plate portion 20 in the Y direction. This makes the Y direction dimension of the plate portion 20 and the distance between the ribs 31 and 32 aligned in the Y direction (i.e., the distance between the base ends 311 and 321) approximately equal.

The retaining protrusion 5 is formed on the plate portion 20 so as to protrude toward one surface 201 of the flange portions 2A and 2B, i.e., it is disposed between the two ribs 31 and 32. A recess 6 is formed on the other surface 202 of the flange portions 2A and 2B at the position where the retaining protrusion 5 is provided. That is, the retaining protrusion 5 and the recess 6 are formed simultaneously by subjecting the plate portion 20 to appropriate processing such as punching, pressing, or rolling.

As shown in FIG. 1, the holding protrusions 5 and recesses 6 extend along the X direction. In this case, the holding protrusions 5 and recesses 6 may be formed over the entire X direction of the flange portions 2A and 2B (up to the ends), or may not be formed at the Y direction ends.

In the illustrated example, the retaining protrusion 5 is located at the center of the plate portion 20 in the Y direction, but in reality, the distance between the retaining protrusion 5 and the rib 31, which is the retaining rib 4 described below, is slightly larger than the Y direction dimension of the tip ends 312, 322 of the ribs 31, 32.

The holding protrusion 5 is formed in a generally V-shaped cross section, i.e., it has an apex 51, a surface 52 facing the rib 31, and a surface 53 facing the rib 32. The surface 52 facing the rib 31 of the holding protrusion 5 is an orthogonal surface that extends perpendicular to the flange portions 2A and 2B (i.e., along the Z direction). The surface 52 may have a slight inclination with respect to the perpendicular direction to the flange portions 2A and 2B, as long as the angle of inclination with respect to the perpendicular direction is smaller than that of the surface 53. In this way, the holding protrusion 5 has an asymmetric shape on both sides in the X direction across the apex 51.

Here, the packaging structure 100 and packaging method for multiple deck plates 1A, 1B will be described with reference to FIG. 4. For convenience of explanation, FIG. 4 shows two types of deck plates 1A, 1B with different X-direction dimensions being packaged, but three or more types of deck plates may be packaged.

First, a pair of deck plates of the same type (i.e., two deck plates 1A and two deck plates 1B) are arranged so that the first surfaces 201 of the flange portions 2A, 2B face each other, and the ribs 31, 32 of one deck plate are brought into contact with or close to the first surface 201 of the other deck plate, forming a deck plate pair. That is, two deck plates 1A form a deck plate pair 10A, and two deck plates 1B form a deck plate pair 10B.

Next, multiple deck plate pairs 10A, 10B are stacked in the Z direction so that the other faces 202 face each other. In the illustrated example, five deck plate pairs 10A, 10B are stacked, with one deck plate pair 10B provided in the center and the other four being deck plate pairs 10A.

When constructing the deck plate pair 10A, 10B as described above, the rib 31 of one deck plate is held by the other deck plate, and the rib of the other deck plate is held by one deck plate. This holding structure will be explained with reference to the deck plate pair 10A arranged at the top in Figure 4. Here, the deck plate 1A provided on the upper side is referred to as one deck plate 1A1, its rib 31 is referred to as rib 31A, and its holding protrusion 5 is referred to as holding protrusion 5A. Additionally, the deck plate 1B provided on the lower side is referred to as the other deck plate 1A2, its rib 31 is referred to as rib 31B, and its holding protrusion 5 is referred to as holding protrusion 5B.

The tip end 312 of the rib 31B of one deck plate 1A2 is positioned between the base end 311 of the rib 31A of the other deck plate 1A1 and the retaining protrusion 5A, and this rib 31B is held. In other words, when the deck plate 1A2 attempts to move in the Y direction relative to the deck plate 1A1, the movement of the rib 31B is restricted by the rib 31A and the retaining protrusion 5A. In this way, the rib 31A of the deck plate 1A1 functions as a retaining rib 4 that, together with the retaining protrusion 5A, holds the rib 31B of the other deck plate 1A2. Similarly, the rib 31A of one deck plate 1A1 is held by the rib 31B (retaining rib 4) and retaining protrusion 5B of the other deck plate 1A2.

Similarly, in deck plate pair 10B, the ribs of the mating deck plate are held by the retaining rib 4 and retaining protrusion 5. At this time, the ribs of the mating deck plate are held in a state in which the Y direction dimension of deck plate pair 10B is equal to the Y direction dimension of deck plate pair 10A, and this Y direction dimension can be maintained. Note that in the above packaging structure 100 and packaging method, the deck plate pair is formed by stacking a pair of deck plates of the same type together, but the deck plate pair may also be formed by stacking deck plates of different types together.

Here, FIG. 5 shows a packaging structure 900 of a comparative example. In the packaging structure 900, five deck plate pairs 901 to 905 are packaged, and like the packaging structure 100, the Y-direction dimension of the deck plate constituting the centrally located deck plate pair 903 is relatively small. At this time, no holding protrusions are formed on each deck plate. Therefore, the pair of deck plates constituting the deck plate pair can move relatively in the Y direction. In the deck plate pairs 901, 902, 904, and 905 constituted by deck plates with relatively large Y-direction dimensions, the relative movement can be suppressed by pressing from the outside during packaging, but in the deck plate pair 903 constituted by a deck plate with a relatively small Y-direction dimension, the relative movement in the Y direction cannot be suppressed even if pressed from the outside. Therefore, a spacer 906 is placed as a packaging member in a position aligned with the deck plate pair 903 in the Y direction, and the relative movement is suppressed by filling the space generated in the packaging structure 900.

In this way, according to the deck plates 1A and 1B of the embodiment of the present invention, the retaining protrusions 5 are provided on one side of the flange portions 2A and 2B, so that the stability of the packaging is ensured while reducing the amount of packaging materials such as the spacer 906.

In addition, a recess 6 is formed on the other surface 202 of the flange portions 2A and 2B at the position where the retaining protrusion 5 is provided, thereby improving the rigidity of the flange portions 2A and 2B.

In addition, the holding protrusions 5 extend along the X direction, which is the long side direction of the flange portions 2A and 2B, making it easier to stably hold the ribs of other deck plates.

In addition, the retaining protrusion 5 faces the retaining rib 4 and has a surface 52 that extends perpendicular to the flange portions 2A and 2B, making it difficult for the ribs of other deck plates to overcome the retaining protrusion 5.

The present invention is not limited to the above-described embodiment, but includes other configurations that can achieve the object of the present invention, and the following modifications are also included in the present invention. For example, in the above-described embodiment of the present invention, the recess 6 is formed at the position where the retaining protrusion 5 is provided, and the retaining protrusion 5 and the recess 6 are formed simultaneously, but the present invention may be configured so that only the retaining protrusion is formed (i.e., the thickness of the flange portion is increased at the position where the retaining protrusion is formed). In addition, a protrusion separate from the flange portion may be fixed to the flange portion by welding or the like.

In addition, in the above embodiment of the present invention, the retaining protrusion 5 extends along the long side direction of the flange portions 2A and 2B, but the shape of the retaining protrusion is not limited to this. For example, multiple retaining protrusions may be scattered along the long side direction of the flange portions, or a single point-like retaining protrusion may be provided.

In addition, in the above embodiment of the present invention, the retaining protrusion 5 has a surface 52 that faces the retaining rib 4 and extends perpendicular to the flange portions 2A and 2B, but is not limited to this configuration. For example, if the rib has a triangular cross-sectional rib side surface that has a relatively small inclination angle with respect to the Z direction, or if the protruding dimension of the retaining protrusion is sufficiently large, making it difficult for the rib to overcome the retaining protrusion, the retaining protrusion does not need to have a surface perpendicular to the flange portion.

In addition, in the above embodiment of the present invention, all of the deck plates 1A, 1B constituting the packaging structure 100 are provided with the retaining protrusions 5, but it is sufficient that the retaining protrusions are provided at least on the deck plate for which it is desired to restrict relative movement. That is, the retaining protrusions may be omitted in the deck plate having the largest Y-direction dimension among the packaging structures, since relative movement is unlikely to occur in the deck plate pair. Furthermore, if a retaining protrusion is provided on at least one of the pair of deck plates constituting the deck plate pair, relative movement can be restricted.

Although the embodiment of the present invention has been described above, the present invention is not limited to the deck plate according to the above embodiment of the present invention, but includes all aspects included in the concept of the present invention and the scope of the claims. In addition, each configuration may be appropriately and selectively combined so as to achieve at least a part of the above-mentioned problems and effects. For example, the shape, material, arrangement, size, etc. of each component in the above embodiment may be appropriately changed depending on the specific usage mode of the present invention.

1A, 1B... deck plate, 2A, 2B... flange portion, 31, 32... rib, 4... retaining rib, 5... retaining protrusion, 52... surface (orthogonal surface), 6... recess, 100... packaging structure, 10A, 10B... deck plate pair

Claims (4)

A rectangular plate-shaped flange portion;
a plurality of ribs protruding from one surface side of the flange portion, extending along a long side direction of the flange portion and aligned in a short side direction ;
A holding protrusion is provided on the one surface side of the flange portion ,
The holding projection has an orthogonal surface extending perpendicular to the flange portion on one side in the short side direction,
A deck plate characterized in that the distance between the retaining protrusion and a retaining rib, which is one of the multiple ribs adjacent to the retaining protrusion on the perpendicular surface side, is larger than the dimension of the tip of the rib in the short side direction . The deck plate according to claim 1, characterized in that a recess is formed on the other side of the flange portion at the position where the retaining protrusion is provided. The deck plate according to claim 1 or 2, characterized in that the retaining protrusion extends along the long side direction of the flange portion. A pair of deck plates each having a rectangular flange portion and a plurality of ribs protruding from one surface side of the flange portion, extending along the long side direction of the flange portion, and aligned in the short side direction, are arranged such that the one surface sides face each other to form a deck plate pair,
A plurality of the deck plate pairs are stacked along a direction perpendicular to the flange portion,
A packaging structure comprising the pair of deck plates, at least one of the deck plates being the deck plate according to any one of claims 1 to 3 .

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