JP2017150130A - Deck plate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a deck plate which is easy in connection by only being slid in a horizontal direction without being lifted even if used as the deck plate for both a synthetic slab and a flat deck.SOLUTION: A deck plate for a concrete slab comprises a slab support part, and a reinforcing rib which is protrusively arranged toward a plane outside direction from a single face of the slab support part. A pair of left and right engagement ribs are formed along edges of the slab support part at both sides in a longitudinal direction, one first engagement rib has a flat plate shaped first erecting part which erects to the plane outside direction of the slab support part, and an engagement inclined part which is inclined while separating from a tip of the first erecting part to the outside at a constant interval, and the other second engagement rib has a flat plate shaped second erecting part which erects to the plane outside direction of the slab support part, and a straddling inclined part which is inclined to a direction reverse to the engagement inclined part from a tip of the second erecting part, and has a width which is accommodated within the constant interval.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a deck plate for a concrete slab used as a driving form that does not require dismantling, and more particularly to a deck plate that can be used as both a composite slab deck plate and a flat deck plate. .

  Conventionally, in order to build concrete slabs for structures such as floor slabs for buildings and roof slabs, they are bridged between shaped steel and formwork as cast-in forms that do not require dismantling, and concrete is placed in them. Various deck plates for concrete slabs have been proposed. This concrete slab deck plate functions as a formwork when casting concrete, and after the concrete hardens, the upper surface is almost flat (flat) as a structural member that is integrated with the concrete and bears tensile stress. However, it is roughly divided into two types of deck plates: flat deck deck plates that are not calculated to bear tensile stress as structural members.

  For example, in Patent Document 1, as a conventional technique, a flat deck plate 5 in which a plurality of reinforcing ribs 2 having a triangular cross section are formed on the lower surface of a horizontal plate 1 is formed at one end along the longitudinal direction. A claw-like connection piece 3 is provided, and the connection piece 3 is press-fitted into the reinforcing rib 2 of another adjacent flat deck plate so that the plurality of flat deck plates 5 do not shift laterally (horizontal direction). A flat deck plate 5 used by engaging and connecting is disclosed (see FIGS. 1 and 3 in the drawings of Patent Document 1).

  Further, in Patent Document 2, spot welding of the flat deck plate FD is possible in a flat deck plate FD in which a plurality of reinforcing ribs 2 having a triangular section are formed on the lower surface of the flat portion 1 that is substantially the same as in Patent Document 1. Therefore, it is disclosed that it can be used as a composite slab deck plate by reversing the top and bottom of the flat deck plate FD (up and down) of the flat deck plate FD. (See FIGS. 1 and 3).

  However, when the conventional flat deck plate 10 such as the flat deck plate 5 described in Patent Document 1 and the flat deck plate FD described in Patent Document 2 is used as a composite slab deck plate, FIG. As shown in a) and (b), the heavy flat deck deck plate 10 must be lifted and claw-shaped connection pieces etc. must be inserted into the grooves of the reinforcing ribs that cannot be seen from the top surface. There was a problem that the connection was very difficult.

  In addition, even if the conventional flat deck deck plate 10 is subjected to a difficult connecting operation for use as a synthetic slab deck plate, the inserted connecting piece is loaded as shown in FIG. Therefore, there is a problem that it is necessary to fix the connecting piece to the reinforcing rib by some fixing means such as welding or caulking, and the work efficiency of the connecting work is poor.

Japanese Utility Model Publication No. 63-10022 Japanese Patent Laid-Open No. 9-4107

  Therefore, the present invention has been devised in view of the above-described problems, and the object of the present invention is that it can be used as a deck plate for a synthetic slab as well as a deck plate for a flat deck. It is an object of the present invention to provide a deck plate that can be easily connected by simply sliding the deck plates horizontally without lifting the deck plates even when used as a deck plate, and does not require fixing work such as welding or caulking.

  A deck plate according to a first aspect of the present invention is a deck plate for a concrete slab that is bent from a steel plate and formed into a rectangular shape in plan view, and a rectangular flat slab support portion that supports the lower surface of the concrete slab, A reinforcing rib projecting along the longitudinal direction from one surface of the slab support portion toward the out-of-plane direction, and a pair of left and right engagement ribs along the longitudinal edges of the slab support portion. One of the first engaging ribs is formed with a flat plate-like first rising portion that rises in the out-of-plane direction of the slab support portion, and an inclination that is inclined outwardly from the tip of the first rising portion by a predetermined distance. A second inclined portion that rises in the out-of-plane direction of the slab support portion, and the engaging inclination from the tip of the second rising portion. Reverse direction And overcoming the inclined portion has a width inclined to fall within the predetermined interval, characterized in that is provided.

  The deck plate according to a second aspect of the present invention is the deck plate according to the first aspect, wherein the second engagement rib is provided with a pressing inclined portion inclined at substantially the same angle in the same direction as the engaging inclined portion from the tip of the climbing inclined portion. It is characterized by being.

  In the deck plate according to a third aspect of the present invention, in the first aspect or the second aspect, the first engagement rib is provided with a guide inclined portion inclined from the engagement inclined portion in a direction opposite to the engagement inclined portion. It is characterized by.

  The deck plate according to a fourth aspect of the present invention is the invention according to any one of the first to third aspects of the present invention, wherein the slab support portion is bent along the longitudinal direction so as to increase bending rigidity, thereby forming irregularities. It is characterized by.

  The deck plate according to a fifth aspect of the present invention is the deck plate according to any one of the first to fourth aspects of the present invention, wherein the deck plate and the inner side thereof are placed on one or both of the first rising portion and the second rising portion. Embossing is formed to prevent the formed concrete from deviating at the interface between the two.

  The deck plate according to a sixth aspect of the present invention is characterized in that, in the fifth aspect, the embossing is a ridge that inclines in either direction with respect to the surface of the slab support portion.

  A deck plate according to a seventh aspect of the present invention is characterized in that, in the invention according to any one of the first to sixth aspects, the reinforcing rib is provided with a triangular section that increases bending rigidity.

  According to the first to seventh inventions, the deck plate can be used as a deck plate for a synthetic slab or a flat deck, and the deck plates can be connected to each other regardless of which deck plate is used. It can be easily performed by simply sliding horizontally without lifting, and the work of fixing the deck plates to each other by welding or caulking is not required.

  Further, according to the first to seventh inventions, the engaging ribs located at the edges on both longitudinal sides of the slab support part have the engaging inclined part and the climbing inclined part extending in the lateral direction at a position away from the slab support part. Therefore, the cross-sectional performance (bending rigidity) at the edge in the short direction is improved, and even when the width is necessary due to the fraction between the multiple of the deck plate width and the width of the concrete slab to be constructed, it is flat. It is possible to deal with only the adjustment plate, and a plurality of types of accessories which have been necessary in the past are unnecessary. For this reason, the material cost of the deck plate and the concrete slab using the deck plate can be reduced and the construction can be simplified.

  Furthermore, according to the first to seventh inventions, the bending rigidity of the engaging rib at the end of the deck plate in the short direction is high, and the direction in which the engaging inclined portion and the climbing inclined portion face is the same. When stacked up and down in opposite directions, they do not protrude outward. For this reason, as described above, an insignificant accessory is not required, and the packaging is further improved, the transportation efficiency is improved, and a sling wire or sling that is hung on a bundle of deck plates when the deck plate is lifted. The engagement ribs are less likely to be deformed by being squeezed by the

  In particular, according to the second aspect of the present invention, the second engaging rib is provided with the pressing inclined portion that is inclined at substantially the same angle in the same direction as the engaging inclined portion from the tip of the climbing inclined portion. Due to the substantially same inclination of the part and the pressing inclination part, the deck plates to be engaged are pressed against each other regardless of whether they are used as the deck plate for the composite slab or the flat deck. It is possible to prevent the cement component from being hardened due to the leaking at the time of installation and the dirt that is difficult to peel off adheres to the lower surface of the deck plate.

  In particular, according to the third aspect of the present invention, since the guide inclined portion is provided on the first engagement rib, when the deck plate is used as a composite slab deck plate, the deck plates are slid horizontally to engage the deck plates. It becomes easier to combine them.

  In particular, according to the fourth aspect of the present invention, the flat surface of the slab support portion is bent along the longitudinal direction to form irregularities, so that the bending rigidity of the slab support portion is improved. Therefore, in the calculation of the strength of the deck plate as a formwork during construction until the strength of the concrete placed on the deck plate is developed, the total cross-sectional area of the vertical section perpendicular to the longitudinal direction of the deck plate is calculated as effective. As a result, the thickness of the deck plate can be reduced compared to the required strength. For this reason, the installation cost of the deck plate including the transportation cost can be reduced.

  In particular, according to the fifth invention, since the emboss is formed in one or both of the first rising portion and the second rising portion, the deck plate and the concrete placed inside thereof are at the interface between them. It is possible to prevent deviation.

  In particular, according to the sixth invention, since the emboss formed on one or both of the first rising portion and the second rising portion is a ridge that is inclined up and down, It is possible to prevent deviation in both the direction and the horizontal direction.

  In particular, according to the seventh aspect, since the reinforcing rib is provided with a triangular section, the bending rigidity of the deck plate can be further increased with a simple configuration that is easy to manufacture.

It is a perspective view which shows the deck plate which concerns on embodiment of this invention. It is a front view which shows the state which looked at the same deck plate horizontally along the longitudinal direction. It is a left view which abbreviate | omits an intermediate part and shows the state which looked at the deck plate same as the above horizontally along the transversal direction. It is a perspective view which shows the state before engaging the same deck plates in the case of using as a deck plate for synthetic | combination slabs. It is a perspective view which shows the state which engaged and arranged the deck plates same as the above in the case of using as a deck plate for synthetic | combination slabs. It is a vertical sectional view which shows the state after concrete placement when the deck plate same as the above is used as a deck plate for synthetic slabs in a vertical section perpendicular to the longitudinal direction of the deck plate. It is engagement state explanatory drawing which shows the state before engagement of the same deck plates in the case of using as a deck plate for synthetic | combination slabs with the vertical cross section orthogonal to a longitudinal direction. It is an engagement state explanatory view which shows the contact state just before the engagement start of the deck plates after FIG. It is an engagement state explanatory view which shows the state where the other engagement rib got on the slope of one engagement rib immediately after the start of engagement of the deck plates after FIG. 8 in a vertical section orthogonal to the longitudinal direction. FIG. 10 is an explanatory diagram of an engagement state showing, in a vertical cross section perpendicular to the longitudinal direction, a state immediately after the other engagement rib rides over the slope of one engagement rib before the end of engagement between the deck plates after FIG. 9. . It is an engagement state explanatory view which shows the state after the end of engagement of the deck plates after FIG. 10 with the vertical cross section orthogonal to a longitudinal direction. It is a perspective view which shows the state before engaging the same deck plates in the case of using as a deck plate for flat decks. It is a perspective view which shows the state which arranged the deck plates same as the above when engaging as a deck plate for flat decks. It is a vertical sectional view which shows the state after concrete placement when the deck plate same as the above is used as a deck plate for flat decks with the vertical cross section orthogonal to the longitudinal direction of a deck plate. It is a vertical sectional view which shows the state after concrete placement when the deck plate same as the above is used as a deck plate for flat decks in the vertical section along the longitudinal direction of the deck plate. It is engagement state explanatory drawing which shows the state before engagement of the same deck plates in the case of using as a deck plate for synthetic | combination slabs with the vertical cross section orthogonal to a longitudinal direction. FIG. 17 is an engagement state explanatory view showing a contact state immediately before the start of engagement between the deck plates after FIG. 16. FIG. 18 is an engagement state explanatory view showing a state in which the other engagement rib rides on the slope of one engagement rib immediately after the start of engagement between the deck plates after FIG. 17 in a vertical cross section orthogonal to the longitudinal direction. FIG. 19 is an engagement state explanatory diagram showing a state immediately after the other engagement rib rides over the slope of one engagement rib before the end of engagement between the deck plates after FIG. 18 in a vertical cross section perpendicular to the longitudinal direction. . FIG. 20 is an engagement state explanatory view showing a state after the engagement between the deck plates after FIG. 19 is shown by a vertical cross section orthogonal to the longitudinal direction. It is drawing which shows the state after concrete placement at the time of using the conventional combined deck plate as a deck plate for synthetic | combination slabs, (a) is a vertical sectional view shown by the vertical cross section orthogonal to the longitudinal direction of the deck plate, b) is the elements on larger scale which expand and show the part which inserts a connection piece in the groove | channel of a reinforcement rib. It is a front view which shows the conventional deck plate for flat decks, and its accessory, (a) shows the standard type of the conventional flat deck deck plate, (b)-(d) is wider than a standard type. The narrow adjustment tool is shown. It is a front view which shows the package which piled up the deck plate for conventional flat decks. It is a front view which shows the package which piled up the deck plate which concerns on this embodiment.

  Hereinafter, a deck plate according to an embodiment of the present invention will be described in detail with reference to the drawings.

  The deck plate 1 according to the embodiment of the present invention is constructed between a structural steel and a formwork as a driven formwork that does not require dismantling in order to construct a concrete slab of a structure such as a floor slab or roof slab of a building. It is a deck plate for concrete slab that is used by placing concrete on the top surface. The deck plate 1 can be applied to both a synthetic slab deck plate and a flat deck deck plate.

  This deck plate 1 is bent from a thin steel plate of about 0.8 mm to 1.6 mm subjected to rust prevention treatment such as hot dip galvanized steel plate (JIS G3302: SGCC, SGC340, SGH340), and according to the shape of the structure. It is a deck plate whose outline is formed in a rectangular shape in plan view of a predetermined length. The length of the deck plate 1 varies depending on the length of the concrete slab to be constructed, the thickness of the steel plate, and the use (whether it is used as a deck plate for a synthetic slab or a deck plate for a flat deck). In general, the length is in the range of about 0.8m to 3.7m.

  As shown in FIGS. 1 to 3, the deck plate 1 according to the present embodiment includes a rectangular flat plate-like slab support portion 2 that supports the lower surface of the concrete slab, and one surface (upper surface in the drawing) of the slab support portion 2. And a pair of left and right engaging ribs 4 that are formed along the longitudinal edges of the slab support portion 2 and that engage with each other. 5 or the like.

  1 to 3 show the case where the ribs (reinforcing ribs 3 and engaging ribs 4 and 5) of the deck plate 1 are positioned upward and above the slab support portion 2, that is, the deck plate 1 is combined with the composite slab. The installation direction in the case of using as a deck plate is illustrated.

  As shown in FIGS. 1 and 2, the deck plate 1 is provided with a reinforcing rib 3 protruding from the center of the slab support portion 2, and the slab support portion 2 has a first rib with the reinforcing rib 3 as a boundary. It is divided into a slab support portion 21 and a second slab support portion 22. Of course, a plurality of reinforcing ribs 3 may be provided, and the slab support 2 may be divided into three or more.

(Slab support part)
The first slab support portion 21 and the second slab support portion 22 are a pair of left and right flat plate members that are line-symmetric with respect to the reinforcing rib 3, and are bent along the longitudinal direction to increase bending rigidity. Is formed.

  In the slab support portion 2 according to the present embodiment, as shown in FIG. 2, both the first slab support portion 21 and the second slab support portion 22 are convex strips having a trapezoidal cross section as the unevenness that increases the bending rigidity. Two chevron ribs 23 are formed.

  For this reason, in the strength calculation of the deck plate 1 as a formwork at the time of construction until the strength of the concrete placed on the deck plate 1 is developed, the vertical cross section of FIG. 2 orthogonal to the longitudinal direction of the deck plate 1 The total cross-sectional area can be calculated as effective, and as a result, the thickness of the deck plate can be reduced compared to the required strength. Therefore, the installation cost of the deck plate 1 including the transportation cost can be reduced.

  Of course, as the projections and depressions provided on the slab support 2, the chevron ribs 23 that are trapezoidal cross-section ridges are illustrated, but ridges having a triangular or polygonal cross-section may be used. That is, the unevenness provided on the slab support portion 2 may be other shapes of ridges or concave ridges as long as it is bent along the longitudinal direction in order to increase bending rigidity.

(Reinforcing rib)
The reinforcing rib 3 is suspended at one side center of the slab support 2 (between the first slab support 21 and the second slab support 22), and a rising portion 30 in which two flat steel plates overlap each other, It is composed of a reinforcing rib portion 31 having a triangular cross section formed at the tip of the rising portion 30, and has a function of improving the bending rigidity of the slab support portion 2 in the longitudinal direction.

(First engagement rib)
The first engagement rib 4 that is the left-side engagement rib shown in FIG. 2 among the pair of engagement ribs rises perpendicularly to the surface of the first slab support portion 21 that is the out-of-plane direction of the slab support portion 2. A flat plate-like first rising portion 40, and a rising inclined portion 41 that rises from the tip of the first rising portion 40 to the upper side in the state of FIG. 2 (the side close to the reinforcing rib 3, the same applies hereinafter), A horizontal portion 42 that continues horizontally from the tip of the rising slope portion 41, an engagement slope portion 43 that slopes downward from the tip of the horizontal portion 42 in the state of FIG. It is comprised from the guide inclination part 44 etc. which incline in the opposite direction to the joint inclination part 43. FIG.

  The first engagement rib 4 has a function of engaging the second engagement ribs 5 of other adjacent deck plates 1 to connect the deck plates 1 to each other.

  Further, as shown in FIG. 2 and the like, a plurality of embosses 45 projecting inward from a flat surface having a width of 5-10 mm and a total length of 30-100 mm are parallel to the first rising portion 40 with a predetermined interval. It is formed side by side. As shown in FIG. 3, the emboss 45 is a long hole-like ridge that inclines up and down in a horizontal view, and the deck plate 1 and the concrete placed inside thereof are displaced at the interface between them. It has a function to prevent. Thus, since the convex stripes of the emboss 45 are inclined up and down, it is possible to prevent the emboss 45 from being displaced in either the vertical direction or the horizontal direction with one type of emboss.

  In addition, the corner | angular used as the junction part of each part of the 1st rising part 40, the rising inclination part 41, the horizontal part 42, the engagement inclination part 43, and the guide inclination part 44 is all curved and bent, and becomes a round face angle. Yes.

(Second engagement rib)
The second engagement rib 5 which is the right engagement rib shown in FIG. 2 among the pair of engagement ribs rises perpendicularly to the surface of the second slab support portion 22 which is the out-of-plane direction of the slab support portion 2. A flat plate-like second rising portion 50, an overriding inclined portion 51 that rises inward and upward from the tip of the second rising portion 50 in the state shown in FIG. 2, and a state shown in FIG. It is comprised from the press inclination part 52 etc. which incline below.

  Further, the inclination height of the climbing inclination part 51 is higher than the inclination heights of the engagement inclination part 43 and the guide inclination part 44, and the inclination angle of the climbing inclination part 51 is between the engagement inclination part 43 and the guide inclination part 44. Unlike the inclination angles, the inclination angle is gentler than these inclination angles in the state of FIG. For this reason, when the steel plate or the like on which the deck plate 1 is placed is slid in the horizontal direction, the climbing inclination part 51 easily gets over the engagement inclination part 43 and the guide inclination part 44, and the second engagement rib. 5 and the first engagement rib 4 of another deck plate are easily engaged.

  In addition, since the inclination of the pressing inclined portion 52 is inclined at substantially the same angle in the same direction as the engaging inclined portion 43, the second engaging rib 5 and the first engaging rib of another deck plate are engaged. When combined, the load is applied in the direction in which the second engaging rib 5 and the first engaging rib of the other deck plate 1 are pressed by the inclination of the engaging inclined portion 43 and the pressing inclined portion 52 due to the weight of the deck plate 1. The deck plates 1 can be brought into perfect engagement with each other. For this reason, it can prevent that a cement component hardens | cures by the leaking of the time of concrete placement, and the stain | pollution | contamination which is hard to peel off adheres to the lower surface of a deck plate.

  As shown in FIG. 2 and the like, a plurality of embosses 53 projecting inward from a flat surface having a width of 5 to 10 mm and a total length of 30 to 100 mm are formed in the second rising portion 50 in the same manner as the emboss 45. Are formed side by side in parallel. As shown in FIG. 1, the embossed 53 is a long hole-like ridge that is inclined up and down in the opposite direction to the embossed 45, and the deck plate 1 and the concrete placed inside thereof are an interface between the two. It has a function to prevent deviation. Since the embossing 53 and the embossing 45 are inclined in opposite directions, the effect of combining with the concrete to prevent the embossing 53 and the embossing 45 from shifting at the interface is further enhanced.

  As shown in each figure, as with the first engagement rib 4, all the corners that become the joints of the second rising portion 50, the climbing inclination portion 51, and the pressing inclination portion 52 of the second engagement rib 5 are all. The curved surface is processed and bent to form round surfaces.

  Further, as shown in FIG. 2 (see also FIGS. 7 and 16), the first rising portion 40 of the first engagement rib 4 and the engagement inclined portion 43 which is the return portion start to be inclined. The horizontal distance D1 from the point is substantially equal to the horizontal distance D2 between the outer surface of the second rising portion 50 of the second engagement rib 5 and the outer surface of the turning point where the pressing inclined portion 52 that is the turning portion starts to be inclined. ing. For this reason, even if there is some error in the processing accuracy of the inclination angle of the engaging inclined portion 43 and the pressing inclined portion 52, the second engaging rib 5 fits in the first engaging rib 4 perfectly. Thus, the first rising portion 40 and the second rising portion 50 are brought into contact with each other by surface contact, so that it is possible to reliably prevent the leakage at the time of placing the concrete.

<Deck plate installation method and engagement rib engagement method>
Next, the installation method of the deck plate 1 and the engagement method of the engagement rib according to the above-described embodiment of the present invention will be described with reference to FIGS.

[Deck plate for synthetic slab]
First, with reference to FIGS. 4 to 11, the installation method and the engagement method when the deck plate 1 is used as a deck plate for a synthetic slab are illustrated as an example of building a building floor slab that is a structure. I will explain.

  As shown in FIG. 4, the deck plate 1 is used as a driving form for constructing a floor slab of a building, and its longitudinal direction is perpendicular to the axial direction of the H-section steel H, which is a building beam (horizontal member). In addition, the ribs are placed between the H-shaped steels H so as to be horizontally oriented upward (horizontally such that the engaging ribs and the like are on the slab support portion).

  Then, as shown in FIG. 4, another deck plate 1 indicated by a broken line is placed side by side so as to be substantially parallel to the deck plate 1 indicated by a solid line already placed on the H-shaped steel H. Thereafter, the deck plate 1 indicated by a broken line is pushed or pulled in the direction of the arrow in the figure toward the deck plate 1 indicated by a solid line, or the second engagement rib 5 is engaged with the first engagement rib 4 so as to engage the deck plate 1. Connect them together.

  In this manner, the first engagement rib 4 and the second engagement rib 5 are engaged to connect the plurality of deck plates 1 to each other, and as shown in FIG. .

  After all the deck plates 1 are laid out on the H-shaped steel H (floor beam) that supports the floor slab, predetermined reinforcement according to the structural design of the floor slab such as a welded wire mesh is applied, and concrete with a predetermined design strength is applied. A floor slab made of reinforced concrete is constructed as shown in FIG.

  The composite slab made of reinforced concrete using such a deck plate 1 as an embedded form has a substantially uniform slab thickness, so that the drying shrinkage, fire resistance and sound insulation performance are also substantially uniform, and cracks after the concrete has hardened. While being able to suppress, fireproof performance and sound insulation performance can also be improved.

  Next, with reference to FIGS. 7 to 11, a method for engaging the deck plates when used as a deck plate for a synthetic slab will be described in detail.

  FIG. 7 is an explanatory diagram of an engagement state showing a state before the engagement between the deck plates 1 in a vertical cross section perpendicular to the longitudinal direction when the deck plate 1 is used as a deck plate for a composite slab. The second engagement rib 5 indicated by a solid line indicates the engagement rib of the deck plate 1 first placed on the H-section steel H which is a beam supporting the floor slab, and the first engagement rib 4 indicated by a broken line is The engaging rib of the deck plate 1 on the side that is placed later and pulled toward the existing deck plate 1 or pressed and slid on the flange of the H-section steel H in the direction of the arrow in the figure is shown. Yes.

  FIG. 8 shows a state immediately before the right deck plate 1 is slid in the direction of the arrow in FIG. 7 and the deck plates 1 are engaged with each other, that is, the first deck plate 1 is slid. 4 is an engagement state explanatory view showing a state in which the engagement rib 4 is in contact with the second engagement rib 5 of the left deck plate 1. FIG.

  As shown in FIG. 8, when the right deck plate 1 is slid to the left, the right deck plate 1 is inclined in the middle of the slope of the climbing slope 51 of the left second engaging rib 5. The round surface angle of the portion 43 and the guide inclined portion 44 abuts.

  9 shows a state immediately after the right deck plate 1 indicated by a broken line is slid in the direction of the arrow in FIG. 8 to start the engagement between the deck plates, that is, the engaging inclined portion of the first engaging rib 4 on the right side. 43 is an engagement state explanatory view showing a state in which the round face angle of 43 and the guide inclined portion 44 rides on the slope of the climbing inclined portion 51 of the second engagement rib 5 on the left side.

  As shown in FIG. 9, when the slide movement of the right deck plate 1 to the left side is continued, the round angle of the engagement inclined portion 43 and the guide inclined portion 44 of the first engagement rib 4 on the right side is changed to the left side. It is guided by the slope of the climbing slope 51 of the two engaging ribs 5 and rides up and rises along the slope, so that one side of the right deck plate 1 is lifted.

  At this time, since the corners of the engaging inclined portion 43 and the guide inclined portion 44 according to the present embodiment are round surfaces (curved surfaces), the sliding of the round surface angle along the inclination of the overcoming inclined portion 51 is smooth. It has become. However, guidance by the slope of the climbing slope 51 is possible even when the guide slope 44 is not provided and the end face of the engagement slope 43 and the slope of the climbing slope 51 are in sliding contact. 44 is not an essential component of the deck plate according to the present invention on the premise that the cross-sectional performance is satisfied.

  FIG. 10 shows a state in which the right deck plate 1 indicated by a broken line is slid in the direction of the arrow in FIG. 9 before the engagement between the deck plates, that is, the engagement inclined portion 43 of the first engagement rib 4 on the right side. It is an engagement state explanatory view showing a state immediately after the round face angle of the guide inclined portion 44 has climbed over the slope of the climbing slope portion 51 of the second engagement rib 5 on the left side.

  As shown in FIG. 10, when the slide movement of the right deck plate 1 to the left side is continued, the round face angles of the engagement inclined portion 43 and the guide inclined portion 44 of the right first engagement rib 4 are changed to the left side. The two engaging ribs 5 get over the inclined surface of the inclined portion 51, and then descend along the inclined surface of the pressing inclined portion 52 of the second engaging rib 5 on the left side.

  At this time, since the inclination angle of the inclined surface of the pressing inclined portion 52 and the inclination angle of the inclined surface of the engaging inclined portion 43 are substantially the same angle, the inertial force of the movement of the right deck plate 1 being slid is moved. In addition, the right deck plate 1 lifted by being guided by the slope of the pressing inclined portion 52 by the weight of the raised deck plate 1 also acts to move to the left side.

  FIG. 11 is an engagement state explanatory view showing a state in which the sliding movement to the left side of the right deck plate 1 indicated by a broken line is completed, that is, a state after the engagement between the deck plates is completed.

  As shown in FIG. 11, the component force to the left of the weight of the right deck plate 1 due to the inclined surface of the pressing inclined portion 52 and the inertial force to stop the stationary deck plate 1 on the left acting in the opposite direction. As a result, the deck plates 1 to be engaged are pressed against each other. For this reason, the deck plates 1 can be closely engaged with each other by surface contact, and it is possible to reliably prevent the leakage of the slot when placing concrete.

[Deck plate for flat deck]
Next, with reference to FIGS. 12 to 20, an installation method and an engagement method when the deck plate 1 is used as a deck plate for a flat deck will be described by exemplifying a case where a floor slab of a building is constructed. .

  As shown in FIG. 12, the deck plate 1 is used as a driving form for constructing a floor slab of a building so that its longitudinal direction is perpendicular to the H-shaped steel that is the beam of the building, and the H-shaped steel. Between the angle steel L attached along the axial direction of H, the rib is bridged horizontally and horizontally (the engagement rib or the like is below the slab support portion).

  Then, as shown in FIG. 12, another deck plate 1 indicated by a broken line is placed side by side so as to be substantially parallel to the deck plate 1 already placed on the H-shaped steel H indicated by a solid line. Thereafter, the deck plate 1 indicated by a broken line is pushed or pulled toward the deck plate 1 indicated by a solid line in the direction of the arrow in the drawing, and the second engagement rib 5 (not shown) is engaged with the first engagement rib 4. The deck plates 1 are connected to each other.

  In this manner, the first engagement rib 4 and the second engagement rib 5 are engaged to connect the plurality of deck plates 1 to each other, and as shown in FIG. .

  As shown in FIG. 13, it is necessary on the angle steel L so that the upper surface of the flange of the H-shaped steel H that is a floor beam that supports the floor slab and the upper surface of the slab support portion 2 of the deck plate 1 are substantially flush with each other. After all the deck plates 1 are laid out, a predetermined reinforcement according to the structural design of the floor slab, such as a welded wire mesh, is applied, and concrete with a predetermined design strength is laid, as shown in FIGS. Build a floor slab made of steel.

  Next, with reference to FIGS. 16 to 20, a method of engaging the deck plates when used as a deck plate for a flat deck will be described in detail.

  FIG. 16 is an engagement state explanatory view showing a state before the engagement between the deck plates 1 in a vertical cross section perpendicular to the longitudinal direction when the deck plate 1 is used as a deck plate for a flat deck. The first engagement rib 4 indicated by a solid line indicates the engagement rib of the deck plate 1 first placed on the angle steel L, and the second engagement rib 5 indicated by a broken line is placed after the existing engagement rib 5. The engagement ribs of the deck plate 1 on the side that is drawn toward or pushed against the deck plate 1 and slides on the flange of the H-section steel H in the direction of the arrow in the figure are shown.

  FIG. 17 shows a state immediately before the right deck plate 1 is slid in the direction of the arrow in FIG. 16 and the deck plates 1 are engaged with each other, that is, the second side of the right deck plate 1 being slid. 4 is an engagement state explanatory view showing a state in which the engagement rib 5 is in contact with the first engagement rib 4 of the left deck plate 1. FIG.

  As shown in FIG. 17, when the right deck plate 1 is slid to the left, the round angle of the engagement inclined portion 43 and the guide inclined portion 44 of the left first engagement rib 4 is the right deck. The plate 1 abuts in the middle of the inclined surface of the climbing inclined portion 51 of the plate 1.

  18 shows a state immediately after the right deck plate 1 indicated by a broken line is slid in the direction of the arrow in FIG. 17 to start the engagement between the deck plates, that is, over the inclined portion 51 of the right second engagement rib 5. These are engagement state explanatory drawings which show the state which got on the round surface angle of the engagement inclination part 43 and the guide inclination part 44 of the 1st engagement rib 4 of the left side.

  As shown in FIG. 18, when the sliding movement of the right deck plate 1 to the left side is continued, the climbing inclined portion 51 of the left second engaging rib 5 becomes the engaging inclined portion of the right first engaging rib 4. 43 and the guide inclined portion 44 are guided by the rounded surface angle, and climb up and rise along the inclination of the climbing inclined portion 51, so that one side of the right deck plate 1 is lifted.

  At this time, since the corners of the engaging inclined portion 43 and the guide inclined portion 44 according to the present embodiment are round surfaces (curved surfaces), the climbing inclined portion 51 smoothly slides up to the round surface angle. It has become. However, it is possible to ride over the climbing inclined portion 51 even when the guide inclined portion 44 is not provided and the end surface of the engaging inclined portion 43 and the slope of the climbing inclined portion 51 are in sliding contact with each other. Even when used as a plate, it can be said that the guide inclined portion 44 is not an essential component of the deck plate according to the present invention on the assumption that the cross-sectional performance is satisfied.

  FIG. 19 shows a state in which the right deck plate 1 indicated by a broken line is slid in the direction of the arrow in FIG. 18 to complete the engagement between the deck plates, that is, the engagement inclined portion 43 of the first engagement rib 4 on the left side. It is an engagement state explanatory drawing which shows the state immediately after the crossing inclination part 51 of the right side 2nd engagement rib 5 got over the round surface angle of the guide inclination part 44. FIG.

  As shown in FIG. 19, when the slide movement of the right deck plate 1 to the left side is continued, the climbing inclined portion 51 of the raised second engagement rib 5 is engaged with the left first engagement rib 4. Overcoming the round face angle of the inclined portion 43 and the guide inclined portion 44, the pressing inclined portion 52 of the second engaging rib 5 is then engaged with the engaging inclined portion of the first engaging rib 4 on the left side as the slide moves. It will descend while sliding along the slope of 43.

  At this time, since the inclination angle of the inclined surface of the pressing inclined portion 52 and the inclination angle of the inclined surface of the engaging inclined portion 43 are substantially the same angle, the inertial force of the movement of the right deck plate 1 being slid is moved. In addition, a force to move to the left side is exerted by the weight of the raised deck plate 1 on the right side, guided by the inclined surfaces of the pressing inclined portion 52 and the engaging inclined portion 43.

  FIG. 20 is an engagement state explanatory view showing a state in which the sliding movement to the left side of the right deck plate 1 indicated by a broken line is completed, that is, a state after the engagement between the deck plates is completed.

  As shown in FIG. 20, the component force to the left of the weight of the right deck plate 1 due to the slope of the engaging slope 43 and the inertia of the left stationary deck plate 1 acting in the opposite direction to stop. The force causes the deck plates 1 to be engaged to be pressed against each other. For this reason, the deck plates 1 can be closely engaged with each other, and the leakage of the slot at the time of placing the concrete can be reliably prevented.

  As an installation method when the deck plate 1 is used as a deck plate for a flat deck, the case where the deck plate 1 is bridged between the angle steels L attached along the axial direction of the H-section steel H has been described as an example. Of course, it is needless to say that the end plate processing may be performed on both ends in the longitudinal direction of the deck plate 1 so as to be directly bridged between the H-shaped steels H without attaching the angle steel L serving as a concrete stopper.

  Further, as described above, the method of engaging the deck plates is illustrated and described. However, when the deck plate is used in the direction opposite to the illustrated direction, that is, as a composite slab deck plate, the second engaging rib is used as the first engaging rib. When using as a deck plate for a flat deck, the first engagement rib may be slid and engaged with the second engagement rib. Even in such a case, it is clear that the above-described effects can be obtained.

<Deck plate features>
Next, the role of the deck plate will be described with reference to FIG. FIG. 22 is a front view showing a conventional deck plate for a flat deck and its accessory, (a) shows a standard type of a conventional deck plate for a flat deck, (b) to (d), This shows an adjustment tool narrower than the standard type.

  As shown in FIG. 22A, the conventional flat deck deck plate 10 generally has three reinforcing ribs and a connecting piece formed at one end in the short direction. . For this reason, bending rigidity cannot be expected at the end portion in the short direction, and the width adjustment is performed according to the width of the concrete slab to be constructed. Therefore, as shown in FIGS. Plate features 11-13 were required.

  On the other hand, in the deck plate 1 according to the embodiment of the present invention, as described above, the first engagement rib 4 and the second engagement rib 5 located at the end in the short direction of the slab support portion 2 are laterally moved. Since the horizontal portion 42, the engaging inclined portion 43, the guide inclined portion 44, the overpass inclined portion 51, the pressing inclined portion 52, etc. are formed, the cross-sectional performance (bending rigidity) of the end portion in the short direction is improved. A flat plate that is placed in the gap between the engagement rib and the steel plate even when the width of the concrete slab to be constructed is rounded and a width adjustment is required. It is possible to cope only with this, and it becomes unnecessary to use a plurality of types of accessories which have been necessary in the past. For this reason, the manufacturing cost of a deck plate and a concrete slab using the same can be reduced.

<Deck plate packing>
Next, the loading state of the deck plate will be described with reference to FIG. FIG. 23 is a front view showing a package form in which the conventional flat deck deck plates 10 are stacked, and FIG. 24 is a front view showing a package form in which the deck plates 1 according to the present embodiment are stacked.

  Deck plates are stacked in a hoop by stacking multiple deck plates into a rectangular shape in consideration of lifting the required number on each floor of the building and transport efficiency to transport the building from the factory to the construction site. They are united and arranged into one package.

  However, as shown in FIG. 23, the conventional flat deck deck plate 10 includes the above-mentioned accessories and the like, so that the dice are formed at the ends of the accessories 11 to 13 having a half size so as to be rectangular in the front view. It was necessary to devise a stacking method such as biting spacers such as camps and thick corners.

  In addition, even if the stacks were devised, there was a high risk that the deck plate would collapse when it was lifted by a sling wire or sling that was hung on the deck plate bundle. In addition, the rigidity of the end portion in the short direction of the deck plate is low, and there is also a problem that a portion protruding in the lateral direction from the end portion is deformed when being squeezed by a sling wire or a sling by lifting.

  On the other hand, as shown in FIG. 24, the engagement rib 4 and the engagement rib 5 described above are formed on the end portion in the short direction of the deck plate 1 according to the embodiment of the present invention, and the bending rigidity is high. Because there is no odd character, the package is a beautiful rectangle in the front view. Moreover, since the direction which the flange part which protrudes in a horizontal direction faces is the same, when it piles up and down, it does not protrude outside. For this reason, the conveyance efficiency is improved, and there is little possibility that the engaging ribs are deformed by being squeezed by the sling wires or slings that are hung on the deck plate bundle during the lifting of the deck plate.

<Operational effects of the deck plate according to the embodiment>
According to the deck plate 1 according to the embodiment of the present invention described above, the deck plate 1 can be used as a deck plate for a synthetic slab or as a deck plate for a flat deck. Can be easily connected by simply sliding the deck plates horizontally without lifting them, and fixing the deck plates by welding or caulking is unnecessary.

  Moreover, according to the deck plate 1, since the slope of the engaging inclined portion 43 and the inclined surface of the pressing inclined portion 52 are formed so as to be inclined at substantially the same angle in the same direction, for the composite slab and for the flat deck In any application, the deck plates to be engaged with each other are pressed against each other, and the cement component is hardened due to the leakage of nose when placing the concrete, and dirt that is difficult to peel off adheres to the bottom surface of the deck plate. Can be prevented.

  In addition, according to the deck plate 1, the cross-sectional trapezoidal shape formed on the flat surface of the slab support portion 2 by being bent along the longitudinal direction in both the first slab support portion 21 and the second slab support portion 22. Since the two chevron ribs 23 that are the ridges are formed, the bending rigidity of the slab support portion 2 is improved. Therefore, in the calculation of the strength of the deck plate as a formwork during construction until the strength of the concrete placed on the deck plate is developed, the total cross-sectional area of the vertical section perpendicular to the longitudinal direction of the deck plate is calculated as effective. As a result, the thickness of the deck plate can be reduced compared to the required strength. For this reason, the installation cost of the deck plate including the transportation cost can be reduced.

  Furthermore, since the emboss 45 and the emboss 53 are formed on the deck plate 1, it is possible to prevent the deck plate 1 and the concrete C placed inside thereof from being displaced at the interface between them.

  Of course, the combined effect of preventing the deck plate 1 and the concrete C from shifting at the interface between them is constant if embossing is formed on either one or both of the first rising portion 40 and the second rising portion 50. The above effects can be achieved. In addition, even if no emboss is formed, the above-described effects can be achieved. Therefore, it can be said that the emboss is formed at the rising portion is not an essential element of the present invention.

  Further, since the reinforcing rib 3 of the deck plate 1 is provided with the reinforcing rib portion 31 having a triangular cross section, the bending rigidity of the deck plate can be further increased with a simple configuration that is easy to manufacture.

  The deck plate according to the embodiment of the present invention has been described in detail above. However, the above-described or illustrated embodiment is merely an embodiment that is embodied in practicing the present invention. Therefore, the technical scope of the present invention should not be limitedly interpreted. In particular, the case where the deck plate is bridged between the steel shapes such as H-shaped steel has been described as an example, but it goes without saying that the deck plate may be bridged between the molds such as the wooden formwork such as the foundation. Absent.

1: Deck plate 2: Slab support part 21: 1st slab support part 22: 2nd slab support part 23: Yamagata rib 3: Reinforcement rib 30: Rising part 31: Reinforcement rib part 4: 1st engagement rib 40: 1st 1 rising part 41: rising inclined part 42: horizontal part 43: engaging inclined part 44: guide inclined part 45: emboss 5: second engaging rib 50: second rising part 51: riding over inclined part 52: pressing inclined part 53: Emboss C: Concrete H: H-section steel (section steel)
L: L section steel (section steel)
10: Conventional flat deck deck plates 11, 12, 13: Functions of conventional deck plates

Claims (7)

A deck plate for a concrete slab that is bent from a steel plate and formed into a rectangular shape in plan view,
A rectangular flat plate-like slab support part that supports the lower surface of the concrete slab, and a reinforcing rib projecting along the longitudinal direction from one side of the slab support part toward the out-of-plane direction,
A pair of left and right engagement ribs are formed along the edges on both sides of the longitudinal direction of the slab support part,
One first engagement rib includes a flat plate-like first rising portion that rises in the out-of-plane direction of the slab support portion, and an engagement inclined portion that is inclined outwardly from the tip of the first rising portion by a predetermined distance. And provided,
The other second engagement rib includes a flat plate-like second rising portion that rises in the out-of-plane direction of the slab support portion, and an inclination in a direction opposite to the engagement inclined portion from the tip of the second rising portion. A deck plate characterized by having a climbing slope portion having a width that fits within a certain interval. The pressing inclination part which inclines in the 2nd engagement rib from the front-end | tip of the said climbing inclination part in the same direction as the said engagement inclination part at substantially the same angle is provided. Deck plate. The deck plate according to claim 1 or 2, wherein the first engagement rib is provided with a guide inclined portion that is inclined from the engagement inclined portion in a direction opposite to the engagement inclined portion. . The deck plate according to any one of claims 1 to 3, wherein the slab support part is formed with irregularities by being bent along a longitudinal direction in order to increase bending rigidity. Either one or both of the first rising portion and the second rising portion is formed with an emboss that prevents the deck plate and the concrete placed inside thereof from shifting at the interface therebetween. The deck plate according to any one of claims 1 to 4. The deck plate according to claim 5, wherein the emboss is a ridge that inclines up and down. The deck plate according to any one of claims 1 to 6, wherein the reinforcing rib is provided with a triangular section that increases bending rigidity.

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